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Journal articles on the topic 'Seals of compressors'

Author: Grafiati

Published: 30 May 2022

Last updated: 31 July 2025

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1

Ying, Ming, Xinghua Liu, Yue Zhang, and Chongbin Zhang. "Impact of Gas Foil Bearings, Labyrinth Seals, and Impellers on the Critical Speed of Centrifugal Compressors for Fuel Cell Vehicles: A Comprehensive Investigation." Lubricants 11, no. 12 (2023): 532. http://dx.doi.org/10.3390/lubricants11120532.

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The critical speed is a crucial factor that impacts the stability of high-speed compressors. However, limited research has simultaneously considered the influence of gas foil bearings (GFBs), labyrinth seals, and impellers on critical speed. In this study, we develop a rotordynamic model that incorporates the aerodynamic forces of GFBs, labyrinth seals, and impellers to explore the effects of each component on the critical speed. To validate the developed model, experimental tests are conducted on a centrifugal compressor test bed, and the results exhibit a high level of agreement with the mod

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2

Kirk, R. Gordon, and S. K. Baheti. "Evaluation of Floating Ring Seals for Centrifugal Compressors Using the Finite Element Method." Journal of Vibration and Acoustics 121, no. 1 (1999): 131–36. http://dx.doi.org/10.1115/1.2893940.

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The use of liquid ring type oil seals in centrifugal compressors was essential for high pressure applications dating back to the early 1960’s. The analysis of high pressure oil seals was first documented in the literature in the mid-1970’s following a series of compressor instability problems that made it clear that a better understanding of how seals influence the overall rotor stability was necessary. To produce compressor designs at higher speeds requires that an adequate method of predicting the oil seal influence on rotor dynamic stability be available for the designer. With the enhanced

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3

Raswin, Nuradi Bin. "Analisis Pengujian Dry Gas Seal Type 28AT Tandem untuk Meningkatkan Reliability Dry Gas Seal di Kompresor Setrifugal." SINTEK JURNAL: Jurnal Ilmiah Teknik Mesin 13, no. 2 (2019): 73. http://dx.doi.org/10.24853/sintek.13.2.73-79.

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Dry gas seal testing is one of the stages in the repair and maintenance of dry gas seals because without testing dry gas seals will have fatal consequences, which can cause more severe damage to the compressor and repair of humans and the environment. In the operation and maintenance of centrifugal compressors, especially gas compressors, there is often damage to dry gas seals or even if they are not damaged dry gas seals must be kept in a health check so that they can be used optimally and their reliability can be improved. In conducting a health check or repairing dry gas seal, one of the de

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4

Busarov, Sergey S., Marina A. Rashchupkina, and Dmitry R. Marchenko. "Study of working processes of reciprocating compressors of road-building machines." Russian Automobile and Highway Industry Journal 22, no. 1 (2025): 26–36. https://doi.org/10.26518/2071-7296-2025-22-1-26-36.

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Introduction. The article presents studies of the possibility of increasing gas pressure in one stage. Reciprocating compressors of road construction machines have been investigated, for which, as for any mobile stations, the issue of reducing the weight and size parameters of process equipment is acute. In this regard, the aim of the work was to expand the range of pressures obtained in single-stage piston machines. An alternative to the use of existing compressors with lubricated flow part can be compressors with seals based on fluoroplastic compounds that do not require liquid lubrication.

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5

Wang, Wei Min, and Wei Zheng An. "Investigation on the Subsynchronous Vibration Fault Diagnosis and Control for Centrifugal Compressor." Applied Mechanics and Materials 34-35 (October 2010): 1488–92. http://dx.doi.org/10.4028/www.scientific.net/amm.34-35.1488.

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Centrifugal compressors are widely used to compressor gas in many different processes within the petroleum and chemical industry. Two vibration types of concern in industrial compressors are synchronous and subsynchronous vibration. The latter, more troubling type of vibration, occurs when non-conservative whirling forces(Cross-coupling) act to excite a lateral natural frequency, which lies below the running speed(subsynchronous vibration). In this paper, more attention is paid to impellers from a rotordynamic standpoint and a synthesis gas compress in ammonia plant is analyzed in order to dia

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6

Aliev, V. I., and I. I. Gasanov. "Improving the Sealing Efficiency of Compressor Cylinders of Gas Engine Compressors in the System of Gas-Lift Production of Offshore Fields." Проблемы машиностроения и надежности машин, no. 6 (November 1, 2023): 96–101. http://dx.doi.org/10.31857/s0235711923060044.

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An increase in the efficiency of gland seals in compressor cylinders with cast iron rings pressed against the contact surface of the piston rod using a steel spring in reciprocating compressors used in offshore oil and gas-condensate fields for gas-lift oil production systems is considered. Studies of a gas engine reciprocating compressor working directly on the operating gas-lift system have shown that in order to increase the time of normal operation of gland seals, it is necessary to adjust the clearance using lubricant up to 0.1 mm. After increasing the spring stiffness, the serviceability

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7

Gelin, A., J. M. Pugnet, D. Bolusset, and P. Friez. "Experience in Full-Load Testing of Natural Gas Centrifugal Compressors for Rotordynamics Improvements." Journal of Engineering for Gas Turbines and Power 119, no. 4 (1997): 934–41. http://dx.doi.org/10.1115/1.2817077.

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During full-load shop tests under natural gas, two multistage centrifugal compressors exhibited subsynchronous vibrations. Both of them are low-flow, high-pressure, high rotational speed compressors, and are fitted with tilting pad bearings and dry gas seals. A rotating stall problem was first eliminated by a modification of the diffuser geometry. Then, aerodynamic excitations caused the rotors to operate at their stability limit, and high vibration levels were observed at the first natural frequency. A complete rotordynamics analysis was performed in order to model precisely all the fluid–str

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8

BASKANBAYEVA, D. D., K. K. YELEMESSOV, L. B. SABIROVA, and N. K. AUBAKIROVA. "INTEGRATION OF SAFETY AND EFFICIENCY OF COMPRESSOR UNITS IN PETROLEUM INDUSTRIAL ENVIRONMENTS." Neft i Gaz 144, no. 6 (2024): 48–63. https://doi.org/10.37878/2708-0080/2024-6.05.

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In this article, the analysis of safety, reliability and efficiency indicators of compressor units according to operating data was carried out. The disadvantages of a commercial nature are revealed, for example, the degree of compressor loading depending on the location of the CNG station, hindering business development. Then the analysis of technical characteristics is carried out, the task is formulated and the most acceptable way of its organizational and technical solution is found. Kazahstan buys compressors for natural gas compression abroad, so, among other things, we are talking about

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9

Sadovskiy, Nikolai, Leonid Strizhak, Anatoliy Simonov, and Mikhail Sokolov. "Some problem of centrifugal compressors upgrading." MATEC Web of Conferences 245 (2018): 09004. http://dx.doi.org/10.1051/matecconf/201824509004.

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The results of computational investigation of the influence of a gas labyrinth seals, oil end seals with floating rings and oil journal bearings lubricating layer stiffness coefficient on centrifugal compressor rotor critical speed are presented and analysed. The main principles of a method for axial forces acting on centrifugal compressor rotor calculation are listed. The method has been developed at the compressor, vacuum and refrigeration technologies department of SPbSTU. In addition, the estimation of method applicability in engineering calculations is given.

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10

Serhii, Shevchenko. "ANALYSIS OF THE IMPACT OF SPECIAL CONSTRUCTIONS OF GAP SEALS ON THE DYNAMICS OF CENTRIFUGAL MACHINES." ScienceRise, no. 5 (Special Issue) (October 30, 2020): 3–13. https://doi.org/10.21303/2313-8416.2020.001485.

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<strong>The object of research:</strong> the influence of the design features of special gap seals on the dynamic characteristics of centrifugal machines. <strong>Investigated problem:</strong> harmonization of the consumption and dynamic characteristics of the seals of the rotors of high-speed machines by applying special design methods. <strong>Main scientific results:</strong> The mechanism and operating conditions of seals with floating rings are described. It is determined that the most effective from the point of view of dynamic characteristics is the variant of the semi-m

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11

Petrovskii, B. S., B. I. Nazarevich, and I. T. Yarema. "Plastic seals of rotor of centrifugal compressors." Chemical and Petroleum Engineering 23, no. 12 (1987): 610–12. http://dx.doi.org/10.1007/bf01147526.

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12

Pavlyuchenko, E. A., A. S. Tegzhanov, V. E. Shcherba, E. A. Lysenko, and A. K. Kuzhbanov. "The analysis of methods for calculating seals of hybrid power machines." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 7, no. 1 (2023): 40–46. http://dx.doi.org/10.25206/2588-0373-2023-7-1-40-46.

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The article discusses the main methods for calculating seals of hybrid power machines. The analysis of works on the designs of hybrid power machines is carried out. The main types of piston seals of pumps, compressors and hybrid power machines are considered, with an emphasis on the main advantages and disadvantages of each type of seal, as well as recommendations on the choice of seals for hybrid power machines. Based on the analysis of the work on the research of piston seals, the main methods for calculating the seals of hybrid power machines are considered and the most suitable one is dete

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13

Soto, E. A., and D. W. Childs. "Experimental Rotordynamic Coefficient Results for (a) a Labyrinth Seal With and Without Shunt Injection and (b) a Honeycomb Seal." Journal of Engineering for Gas Turbines and Power 121, no. 1 (1999): 153–59. http://dx.doi.org/10.1115/1.2816303.

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Centrifugal compressors are increasingly required to operate at higher pressures, speeds, and fluid density. In these conditions, compressors are susceptible to rotordynamic instabilities. To remedy this situation, labyrinth seals have sometimes been modified by using shunt injection. In shunt injection, the gas is taken from the diffuser or discharge volute and injected into an upstream chamber of the balance-piston labyrinth seal. The injection direction can be radial or against rotation. This study contains the first measured rotordynamic data for labyrinth seals with shunt injection. A com

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14

Shevchenko, Serhii. "ANALYSIS OF THE IMPACT OF SPECIAL CONSTRUCTIONS OF GAP SEALS ON THE DYNAMICS OF CENTRIFUGAL MACHINES." ScienceRise, no. 5 (November 11, 2020): 3–13. http://dx.doi.org/10.21303/2313-8416.2020.001485.

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The object of research: the influence of the design features of special gap seals on the dynamic characteristics of centrifugal machines. Investigated problem: harmonization of the consumption and dynamic characteristics of the seals of the rotors of high-speed machines by applying special design methods. Main scientific results: The mechanism and operating conditions of seals with floating rings are described. It is determined that the most effective from the point of view of dynamic characteristics is the variant of the semi-movable ring. Expressions for determining the condition

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15

Yusha, V. L., S. S. Busarov, and A. V. Nedovenchany. "The assessment of applicability of single-stage piston long-stroke low-speed compressors in low-temperature refrigeration machines." Omsk Scientific Bulletin. Series Aviation-Rocket and Power Engineering 8, no. 3 (2024): 21–28. http://dx.doi.org/10.25206/2588-0373-2024-8-3-21-28.

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The work processes and integral characteristics of low-temperature ammonia single-stage piston longstroke low-speed compressors are considered. A method for calculating the actual working process of a stage of such a compressor is presented, taking into account such basic factors as the processes of non-stationary heat transfer between the working fluid in the cylinder and the external cooling medium; processes of flow of the working fluid through leaks in valves and in seals of the cylinder-piston group; dynamics of motion of the shut-off valve body, etc. The flow coefficient, cooling coeffic

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16

Shade, W. N., and D. W. Legg. "Explosive Decompression Resistance of Centrifugal Compressor O-Ring Seals: A Comparative Test Summary and Procedure." Journal of Engineering for Gas Turbines and Power 110, no. 2 (1988): 289–94. http://dx.doi.org/10.1115/1.3240119.

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Explosive decompression is a phenomenon that can destroy O-ring sealing elements in high-pressure (>3.4 MPa) natural gas compressors during rapid venting to atmospheric pressure. A test rig and procedure have been developed to identify important parameters influencing O-ring seal explosive decompression failure, consistent with utilization of these seals in high-pressure centrifugal compressors. The test rig and procedure are described and comparative test results presented.

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17

Childs, Dara W., Luis E. Rodriguez, Vito Cullotta, Adnan Al-Ghasem, and Matthew Graviss. "Rotordynamic-Coefficients and Static (Equilibrium Loci and Leakage) Characteristics for Short, Laminar-flow Annular Seals." Journal of Tribology 128, no. 2 (2005): 378–87. http://dx.doi.org/10.1115/1.2164468.

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Test results are presented for laminar-flow seals that are representative of buffered-flow oil seals in centrifugal compressors. The seals are short (L∕D≅0.21), with a diameter of 117mm and a clearance-to-radius ratio 0.0007. A smooth seal, a seal with one central groove, and a seal with three grooves were tested. Groove geometries employed are representative of industrial practice for compressors with a groove-depth to clearance ratio on the order of 6. Tests were conducted at 4000, 7000, and 10,000rpm shaft speed with delta pressures across the seals of 21, 45, and 69bars. For all cases, the

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18

Kuznetsov, Eduard, and Iveta Pandová. "Calculation of the Operational Characteristics of the Impulse Gas-Barrier Face Seal." Management Systems in Production Engineering 31, no. 4 (2023): 411–17. http://dx.doi.org/10.2478/mspe-2023-0046.

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Abstract The problem of reducing leaks along the pump or compressor shaft of pumped liquids and gases into the environment is very urgent. Serious difficulties have to be faced when sealing the shafts of machines that pump aggressive, toxic, explosive and fire-hazardous environments. According to modern occupational safety requirements, such pumps and compressors should use double seals with a barrier medium whose pressure exceeds the sealed one by 0.05-0.2 MPa. Currently, liquid-lubricated double mechanical seals are widely used in chemical production equipment, however, over the last decade

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19

Shade, W. N., and D. E. Hampshire. "An Experimental Investigation of Oil-Buffered Shaft Seal Flow Rates." Journal of Engineering for Gas Turbines and Power 107, no. 1 (1985): 170–80. http://dx.doi.org/10.1115/1.3239679.

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An experimental investigation was conducted to identify an optimum oil-buffered shaft seal for use on centrifugal compressors, with the primary objective being minimal seal oil exposure to process gases that cause seal oil degradation or are toxic. Types of seals tested included smooth bore cylindrical bushings, spiral groove cylindrical bushings, radial outward-flow face seals, and radial inward-flow face seals. The influence of shaft speed, gas pressure, seal oil differential pressure, oil bypass flow rate, and oil supply temperature on process side seal oil flow rate was determined. The inv

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20

Reedy, S. W., and R. G. Kirk. "Advanced Analysis of Multi-Ring Liquid Seals." Journal of Vibration and Acoustics 114, no. 1 (1992): 42–46. http://dx.doi.org/10.1115/1.2930232.

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The equilibrium position of multi-ring seal assemblies is of major importance to the designer of high pressure centrifugal compressors. Typical computer codes now use a curve-fit of the Short Bearing Sommerfeld Number for eccentricity evaluation with the assumption that all rings in the assembly will always operate at the same eccentricity. The results from the recently developed seal analysis program, SEALS, have shown that the equal eccentricity assumption for multi-ring seals is questionable. This paper will review the analysis procedure used in SEALS, and present the results of an eccentri

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21

Matuszewski, Leszek, and Piotr Bela. "New Designs of Magnetic Fluid Seals for Reciprocating Motion." Polish Maritime Research 28, no. 4 (2021): 151–59. http://dx.doi.org/10.2478/pomr-2021-0057.

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Abstract The operating conditions of magnetic fluid seals during reciprocating motion are so different from those observed in rotating motion that the use of their conventional structures for reciprocating motion seals yields no good results. The analysis of the sealing mechanism of magnetic fluid seals in reciprocating motion shows that the operation of these seals is affected by the carry-over phenomenon and magnetic fluid film deformation in the sealing gap, which depends on the velocity of the reciprocating motion. The reduced amount of magnetic fluid in the sealing gap caused by the recip

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22

Kwon, Jeong Woo, and Joon Ahn. "Prediction of Leakage Flow Rate and Blow-Down in Brush Seals via 2D CFD Simulation with Porosity Correction." Applied Sciences 14, no. 19 (2024): 8821. http://dx.doi.org/10.3390/app14198821.

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Brush seals are extensively used in rotating equipment, such as gas turbines and compressors, providing effective sealing while accommodating radial, axial, and angular movements between components. In this study, the performance of brush seals with and without clearances was predicted through axisymmetric 2D computational fluid dynamic (CFD) simulations using a porous media model. Because the accurate modeling of a brush seal requires the appropriate porosity to be determined and the flow resistance to be calculated, a porosity correction was performed based on the brush seal’s geometry and p

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23

TYMOSHCHUK, Oleksandr. "DEVELOPMENT AND ANALYSIS OF THE ACCURACY OF ENGINEERING METHODS FOR DETERMINATION OF INTERACTION VOLUME FOR CALCULATION OF THE TIGHTNESS OF NON-LUBRICATING CYLINDER-PISTON SEALS." Herald of Khmelnytskyi National University 303, no. 6 (2021): 256–59. http://dx.doi.org/10.31891/2307-5732-2021-303-6-256-259.

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Based on the theory of stochastic processes, methods of engineering calculation of the contact volume for the calculation of the tightness of non-lubricating cylinder-piston seals of compressors have been developed. The result is the creation of methods for calculating the tightness (duration of gas flow) in non-lubricating cylinder-piston metal-polymer seals, as well as assessing the accuracy of the created methods for piston seals. The article considers the elastic contact of a strongly anisotropic rough surface (polymer surface) with a smooth (metal) surface. The dependence of the intercont

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24

Pellegrino, Antonio, Maria Jesus Perez-Martin, Kalin Dragnevski, Giuseppe Zumpano, and Nik Petrinic. "Temperature and strain rate dependent mechanical response of METCO 601 aluminium-polyester abradable seal coating." EPJ Web of Conferences 183 (2018): 04012. http://dx.doi.org/10.1051/epjconf/201818304012.

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Abradable coatings are utilised as sacrificial materials in low-pressure compressor casings, and in intermediate and high pressure compressors and seals. The adoption of abradable coatings allows for the clearance between compressor blades and casing to be minimised, increasing the overall efficiency of the engine. Quasi-static and dynamic experiments at different temperatures are conducted to characterise the mechanical response of a thermally-sprayed abradable seal coating. The material is composed of an aluminium continuum matrix and fairly well-dispersed polyester particles. Stress versus

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25

Lelgemann, K. D. "The Design, Selection, and Application of Oil-Free Screw Compressors for Fuel Gas Service." Journal of Engineering for Gas Turbines and Power 117, no. 1 (1995): 74–80. http://dx.doi.org/10.1115/1.2812784.

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Fuel gas compressors installed in cogeneration systems must be highly reliable and efficient machines. The screw compressor can usually be designed to meet most of the gas flow rates and pressure conditions generally required for such installations. To an ever-increasing degree, alternative sources are being found for the fuel gas supply, such as coke-oven gas, blast-furnace gas, flare gas, landfill gas, and synthesis gas from coal gasification or from pyrolysis. A feature of the oil-free screw compressor when such gases are being considered is the isolation of the gas compression space from t

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26

Schwerdtfeger, Markus. "Leakage test examination of shaft seals for CO2 refrigerant compressors." ATZ worldwide 111, no. 6 (2009): 38–43. http://dx.doi.org/10.1007/bf03225080.

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27

Gilev, K. O., I. Y. Kleinrock, A. Y. Kultyshev, and A. V. Skorohodov. "Development of a unified line of booster compressor units for combined-cycle power plants." Safety and Reliability of Power Industry 16, no. 2 (2023): 97–102. http://dx.doi.org/10.24223/1999-5555-2023-16-2-97-102.

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In a period from 2000 till 2020, a program of power industry modernization through Capacity Supply Agreements (DPM program) was implemented in Russia. Within the DPM program, more than a hundred power facilities were put in operation, including foreign-made equipment and equipment partly localized in Russia.Since the foreign companies left the Russian market, an actual state target is now to localize the main and auxiliary equipment for combined-cycle power plants as well as to replace missing manufacturing technologies for manufacture of new apparatuses and spare parts.Hundreds of foreign-mad

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28

Baheti, S. K., and R. G. Kirk. "Analysis of High Pressure Liquid Seal Ring Distortion and Stability Using Finite Element Methods." Journal of Tribology 121, no. 4 (1999): 921–26. http://dx.doi.org/10.1115/1.2834156.

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The evaluation of floating bushing ring oil seals is of great importance for designs of high pressure centrifugal compressors. This is a result of their enhanced damping capacity at low speeds and their strong destabilizing action at speeds in excess of twice the compressor first critical speed. Accurate prediction of oil seal leakage and exit temperature is very important from the standpoint of the pump and cooler selection for the seal oil console. The previous research has performed thermohydrodynamic (THD) analysis of bushing seal rings with various geometries. The current work is to evalu

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29

Wang, Yu-Ming, and Zhen-Qing Chen. "Effective Use of Buffer Gas Sleeve-Type Seals in Centrifugal Compressors." Tribology Transactions 31, no. 3 (1988): 376–81. http://dx.doi.org/10.1080/10402008808981837.

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30

Schaller, Andreas, Novin Darvishsefat, and Eberhard Schlücker. "Simulation and Experimental Investigation of Labyrinth Seals for Reciprocating Piston Compressors." Chemical Engineering & Technology 41, no. 5 (2018): 1043–50. http://dx.doi.org/10.1002/ceat.201700698.

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31

Izemenko, V., A. Zahorulko, and Yu Zahorulko. "Leakage and rotordynamic coefficients of labyrinth-scallop seals." Problems of Tribology 29, no. 4/114 (2024): 14–23. https://doi.org/10.31891/2079-1372-2024-114-4-14-23.

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Reducing leakages and improving the rotor-dynamic damping characteristics of annular seals is an essential problem of sealing technology. A whole range of damping seals are used to seal the shafts of turbomachines, such as honeycomb, hole pattern, pocket, and scallop seals. To reduce the cost and production time, the scallop seals are increasingly used. They showed quite good dynamic and leakage characteristics in the modernization of compressors in the chemical industry. Some designs of scallop seals are able not only to increase dynamic performance (additional use of swirl brakes in the form

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32

Ivanov, V. M., Yu V. Kozhukhov, and A. M. Danylyshyn. "IMPROVING THE QUALITY OF DESIGNING LOW-FLOW STAGES OF CENTRIFUGAL COMPRESSORS DUE TO VERIFICATION AND VALIDATION OF CALCULATED CFD MODELS." Izvestiya of Samara Scientific Center of the Russian Academy of Sciences 22, no. 6 (2020): 48–56. http://dx.doi.org/10.37313/1990-5378-2020-22-6-48-56.

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The quality of the produced centrifugal compressors largely depends on the design quality of the flow path. In order to carry out high-quality design of low-flow stages of centrifugal compressors, in this work, a numerical model of a low-flow stage is verified and validated, which are based on modern methods of computational fluid dynamics - CFD (computational fluid dynamics) as part of CALS technologies. In the numerical model of the step, clearances and labyrinth seals were modeled. The issues of using intergrid interfaces, application of turbulence and roughness models are considered. The o

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33

Gunter, Edgar J. "Lund’s Contribution to Rotor Stability: The Indispensable and Fundamental Basis of Modern Compressor Design." Journal of Vibration and Acoustics 125, no. 4 (2003): 462–70. http://dx.doi.org/10.1115/1.1605978.

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In the early design of compressors and turbines, it was of importance to locate the rotor critical speeds so as to insure that a turbo rotor would not be operating at a critical speed. As compressor and turbine design became more sophisticated, a more detailed analysis of the rotor damped critical speeds and rotor log decrements was necessary. With compressors and turbines operating at higher speeds, under high power levels, and at multiples of the first critical speed, the problem of stability or self-excited whirling is of paramount importance. The onset of self-excited motion may lead to la

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34

Aliyev, Alesker M. "Determination of kinematic parameters of the compressor unit applied to low-pressure petroleum gas." Nafta-Gaz 79, no. 4 (2023): 252–56. http://dx.doi.org/10.18668/ng.2023.04.03.

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The collection and transportation of low-pressure gas released into the atmosphere from the oil fields is important in increasing gas production. This issue, which differs in its actuality, has both economic and pollution preveniton benefits. One such project, led by the UN Development Fund, was successfully implemented in the city of Siyazan, Azerbaijan. An electrically driven compressor unit of NQK-7/1-5 type with two oscillating cylinders is commonly used for such work. On visual inspection of the compressors undergoing repair, it was found that the seals in the pneumatic part and the eleme

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35

XI, JINXIANG, and DAVID L. RHODE. "Rotordynamics of Impeller Eye Seals with Wear-Damaged Teeth in Centrifugal Compressors." Tribology Transactions 49, no. 3 (2006): 328–37. http://dx.doi.org/10.1080/05698190600678655.

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36

Wyssmann, H. R. "Rotor Stability of High Pressure Multistage Centrifugal Compressors." Journal of Vibration and Acoustics 110, no. 2 (1988): 185–92. http://dx.doi.org/10.1115/1.3269497.

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A major factor influencing rotor stability of multistage high pressure centrifugal turbocompressors are the forces caused by the fluid-rotor interaction in the interstage and balance piston gas seals. An example of a fully 3-D labyrinth flow solution shows that using time averaged Navier-Stokes solutions are still excessive in computer time and hence cannot be used for practical applications. The paper gives a theory based on a two-volume bulk flow model for the prediction of the rotor-dynamic coefficients used for rotor stability calculation by complex eigenvalue analysis. Comparisons of pred

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37

Memmott, E. A. "Stability Analysis and Testing of a Train of Centrifugal Compressors for High Pressure Gas Injection." Journal of Engineering for Gas Turbines and Power 121, no. 3 (1999): 509–14. http://dx.doi.org/10.1115/1.2818502.

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This paper describes the rotor dynamic stability analysis and the PTC-10 Class 1 test of a three body centrifugal compressor train for high pressure natural gas injection service. This train had a full load full pressure string test on hydrocarbon gasses to a final discharge pressure of 500 BAR (7250 PSIA). Each compressor is of the back to back configuration, and is equipped with tilting pad seals, damper bearings, and a honeycomb labyrinth at the division wall with shunt holes. The driver is a gas turbine.

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38

Yucel, U., and J. Y. Kazakia. "Analytical Prediction Techniques for Axisymmetric Flow in Gas Labyrinth Seals." Journal of Engineering for Gas Turbines and Power 123, no. 1 (2000): 255–57. http://dx.doi.org/10.1115/1.1340630.

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Labyrinth seals are commonly found in turbines and compressors. Their objective is to control gas leakage from high pressure regions to low pressure regions. The correct prediction and control of this leakage is crucial for the efficient and economic operation of turbomachinery. In this paper we present approaches for obtaining the above prediction in a simple analytical and explicit method. Both constant and pressure dependent flow coefficients are incorporated in the present study which extends to the higher inlet/outlet pressure differences. The results obtained with our methods compare fav

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Sprowl, Tony B., and Dara W. Childs. "A Study of the Effects of Inlet Preswirl on the Dynamic Coefficients of a Straight-Bore Honeycomb Gas Damper Seal." Journal of Engineering for Gas Turbines and Power 129, no. 1 (2004): 220–29. http://dx.doi.org/10.1115/1.2227416.

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Honeycomb seals are frequently used as replacements for labyrinth seals in high-pressure centrifugal compressors to enhance rotordynamic stability. A concern exists that this enhanced stability will be lost if the honeycomb cavities become clogged. Static and dynamic tests were conducted on a honeycomb and a smooth seal (representing the honeycomb seal with completely clogged cells) at the same constant clearances using air with a supply pressure of 70 bars. The test matrix included three speeds, three pressure ratios, and three inlet preswirl conditions. The results show increased leakage, de

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Al-Ghasem, Adnan, G. L. Morrison, and John P. Platt. "Experimental and Numerical Investigation of a Gas Compressor Windback Seal." Journal of Tribology 129, no. 1 (2006): 129–34. http://dx.doi.org/10.1115/1.2401205.

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The effectiveness of a computational fluid dynamics (CFD) commercial code to accurately predict the leakage rate for a windback seal was evaluated. The windback seal under consideration has a rectangular cavity and is similar in design to a gas tooth on stator annular labyrinth seal. The main difference is the windback seal has only one tooth, which continuously winds around the shaft like a screw thread. These seals are used in gas compressors to isolate the gas face seal from bearing oil. A purge gas is passed through the seal into the bearing housing. The helical design allows the seal to c

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Dorokhin, V. P., A. V. Yanko, O. V. Nasakin, and E. A. Shevtsova. "Testing of materials for end seals of compressors used in mobile air conditioners." Chemical and Petroleum Engineering 23, no. 3 (1987): 123–25. http://dx.doi.org/10.1007/bf01156778.

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Childs, Dara W., Matthew Graviss, and Luis E. Rodriguez. "Influence of Groove Size on the Static and Rotordynamic Characteristics of Short, Laminar-Flow Annular Seals." Journal of Tribology 129, no. 2 (2007): 398–406. http://dx.doi.org/10.1115/1.2647471.

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Test results are presented for a smooth seal and three centrally grooved seals that are representative of buffered-flow oil seals in centrifugal compressors. The seals are short (L∕D≅0.21), with a diameter of 117mm and a nominal radial clearance of 0.085mm, netting the clearance-to-radius ratio 0.0015. The grooves have groove depth to clearance ratios (Dg∕Cr) of 5, 10, and 15. Test conditions include three shaft speeds from 4000rpm to 10,000rpm, three inlet oil pressures from 24bar to 70bar, and seal eccentricity ratios from 0 (centered) to 0.7. Dynamic results include stiffness, damping, and

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Wellborn, S. R., I. Tolchinsky, and T. H. Okiishi. "Modeling Shrouded Stator Cavity Flows in Axial-Flow Compressors." Journal of Turbomachinery 122, no. 1 (1999): 55–61. http://dx.doi.org/10.1115/1.555427.

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Experiments and computational analyses were completed to understand the nature of shrouded stator cavity flows. From this understanding, a one-dimensional model of the flow through shrouded stator cavities was developed. This model estimates the leakage mass flow, temperature rise, and angular momentum increase through the cavity, given geometry parameters and the flow conditions at the interface between the cavity and primary flow path. This cavity model consists of two components, one that estimates the flow characteristics through the labyrinth seals and the other that predicts the transfer

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Baheti, S. K., and R. G. Kirk. "Finite Element Thermohydrodynamic Analysis of Two-Lobe Oil Seals Used in High Pressure Centrifugal Compressors." Tribology Transactions 41, no. 4 (1998): 554–62. http://dx.doi.org/10.1080/10402009808983782.

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Wu, Fan, Jinbo Jiang, Xudong Peng, Liming Teng, Xiangkai Meng, and Jiyun Li. "Influence of Natural Gas Composition and Operating Conditions on the Steady-State Performance of Dry Gas Seals for Pipeline Compressors." Lubricants 12, no. 6 (2024): 217. http://dx.doi.org/10.3390/lubricants12060217.

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A dry gas seal (DGS) is one of the key basic components of natural gas transmission pipeline compressors, and the sealing performance of a DGS dealing with complex multi-component pipeline natural gas is different from that dealing with conventional nitrogen medium. In this paper, a spiral groove DGS of the compressor in natural gas transmission pipeline systems is taken as the research object. The thermal hydrodynamic lubrication model of the DGS is established considering turbulence effect and choking effect. Based on the finite difference method, the temperature and pressure distributions a

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Baheti, S. K., and R. G. Kirk. "Thermo-Hydrodynamic Solution of Floating Ring Seals for High Pressure Compressors Using the Finite-Element Method." Tribology Transactions 37, no. 2 (1994): 336–46. http://dx.doi.org/10.1080/10402009408983302.

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M., Purusothaman, Sai Teja Nama, Jaswanth Reddy Muddarapu, Pavan Ram Oduri, and Surya Saketh Meka. "Structural Analysis of Mechanical Seal Holding for Mixer Pumps." International Journal of Engineering and Advanced Technology (IJEAT) 9, no. 3 (2020): 3867–72. https://doi.org/10.35940/ijeat.C6367.029320.

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A mechanical seal is a device that used to reduce leakage containing pressure or ignoring contamination. Mechanical seal is the device used in centrifugal Pumps, Mixers, Agitators and Compressors to arrest or reduce the leakage. The mechanical seal standard API 682 provides the design guidelines for the seals which are fits below 110mm shaft diameter and 4.2 N/mm2 seal chamber pressure. Any seal more than these parameters required special engineering or guidelines needs from technical service. The main aim is to design the mechanical seal for more than 110mm shaft diameter and more than 4.2 N/

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Villasmil, Larry A., Dara W. Childs, and Hamn-Ching Chen. "Understanding Friction Factor Behavior in Liquid Annular Seals With Deliberately Roughened Surfaces." Journal of Tribology 127, no. 1 (2005): 213–22. http://dx.doi.org/10.1115/1.1828071.

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Multistage centrifugal pumps and compressors are among the most widely used pieces of rotating machinery in industry. A typical application demands the arrangement of several impellers or wheels mounted on a shaft that spins within a stationary case. Annular seals are the most common sealing devices used in this type of machinery. The annular seal design affects both (i) machinery performance in terms of energy conversion efficiency, and (ii) stability due to the interaction within the rotor and the stator through the fluid flow within the seals. Traditionally, the “bulk-flow” theory due to Hi

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Zou, Chang, Yangxin Ou, Weiliang Zhou, Zhiqiang Li, Pu Zheng, and Xingzhong Guo. "Microstructure and Properties of Hot Pressing Sintered SiC/Y3Al5O12 Composite Ceramics for Dry Gas Seals." Materials 17, no. 5 (2024): 1182. http://dx.doi.org/10.3390/ma17051182.

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Silicon carbide (SiC) ceramics with high bending strength were prepared by hot pressing sintering (HPS) with yttrium aluminum garnet (Y3Al5O12, YAG) as sintering additive, and the effects of YAG content and sintering temperature on the sintering behavior, microstructure and mechanical properties of SiC ceramics were investigated in detail. The uniform distribution of YAG to form a liquid phase and the driving force provided by hot pressing sintering decrease the sintering temperature, improve the densification of SiC ceramics, and refine the crystal size. By means of suitable sintering conditi

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Baha, Vadym, Natalia Lishchenko, Serhiy Vanyeyev, Jana Mižáková, Tetiana Rodymchenko, and Ján Piteľ. "Numerical Simulation of Gas Flow Passing through Slots of Various Shapes in Labyrinth Seals." Energies 15, no. 9 (2022): 2971. http://dx.doi.org/10.3390/en15092971.

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Labyrinth seals are widely used in centrifugal compressors, turbines, and many other pneumatic systems due to their simplicity of design, reliability, and low cost. The calculation scheme for the movement of the working medium in a labyrinth seal is constructed by analogy with the movement of the working medium through holes with a sharp edge. Annular and flat slots, holes, and such a factor as the shaft rotation with a calculated sector of 3 degrees were studied. The purpose of the study is to determine the flow coefficient when the working medium flows through slots of various shapes. To ach

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