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Journal articles on the topic 'Rotary valve'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Soloviev, I. I., N. V. Klenov, S. V. Bakurskiy, V. V. Bol'ginov, V. V. Ryazanov, M. Yu Kupriyanov, and A. A. Golubov. "Josephson magnetic rotary valve." Applied Physics Letters 105, no. 24 (December 15, 2014): 242601. http://dx.doi.org/10.1063/1.4904012.

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2

Bey, Roger. "Rotary noise attenuating valve." Journal of the Acoustical Society of America 105, no. 1 (1999): 24. http://dx.doi.org/10.1121/1.424745.

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3

Du, huiqi, and dong Du. "Gasoline New Timing and Flux Adjustable Rotary Valve Design (Hereinafter: Rotary Valve)." MATEC Web of Conferences 68 (2016): 04003. http://dx.doi.org/10.1051/matecconf/20166804003.

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4

Yu, Ji Cheng. "Stress Analysis and Exploration of the Rotary Valve." Advanced Materials Research 952 (May 2014): 206–9. http://dx.doi.org/10.4028/www.scientific.net/amr.952.206.

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the low pressure oil chamber and the high pressure oil chamber act directly on Both sides of the rotary valve. It will be large axial force to the valve body If the system working pressure is greater. The resulting outcome is low vibration frequency of the rotary valve driven hydraulic exciter. How to improve the hydraulic exciter frequency?We can improve the speed of the rotary valve or increase the number of rotary valve guide groove. But if we increase the tank guided number ,the diameter of the rotary valve spoo must be increased. Design a rotary valve without axial force can solve the problem of the rotary valve spool shaft size restricted. By calculation and analysis of the rotary valve spool suffered axial force . The work of a single rotary valve chamber pressure problems can be solved spool axial force

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5

NOGAMI, TADAHIKO, ICHIRO NAKAMURA, HIROYUKI SADAMORI, and HIRONORI SIMOGAMA. "Development of rotary servo valve." Proceedings of the JFPS International Symposium on Fluid Power 1993, no. 2 (1993): 435–40. http://dx.doi.org/10.5739/isfp.1993.435.

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6

YAMAMOTO, Hiroshi, Naruto YAMANE, Kazuhiro MAJIMA, Ryutarou MIYAJI, and Teturou OBARA. "2711 Development of rotary valve." Proceedings of the JSME annual meeting 2005.4 (2005): 145–46. http://dx.doi.org/10.1299/jsmemecjo.2005.4.0_145.

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7

Deng, Baoqing, Zhenyu Deng, Yuezhen Gao, Dingkai Liang, and Mengqi Deng. "Single Rotary Valve Engine Design." IOP Conference Series: Earth and Environmental Science 603 (December 1, 2020): 012040. http://dx.doi.org/10.1088/1755-1315/603/1/012040.

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8

Deng, Baoqing, Zhuoya Liu, Zengfa Gao, Shihang Li, and Mengqi Deng. "Double Rotary Valve Engine Design." IOP Conference Series: Earth and Environmental Science 603 (December 1, 2020): 012048. http://dx.doi.org/10.1088/1755-1315/603/1/012048.

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9

Gricay, A. S., A. V. Kaplienko, D. N. Donchenko, and B. B. Paychadze. "Hydrodynamic processes in rotary slide valve." St. Petersburg State Polytechnical University Journal 214, no. 1 2015 (March 2015): 209–15. http://dx.doi.org/10.5862/jest.214.24.

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10

Kannon, Tatsumi. "Analysis of Rotary Compressor Valve Noise." Transactions of the Japan Society of Mechanical Engineers Series C 60, no. 570 (1994): 418–23. http://dx.doi.org/10.1299/kikaic.60.418.

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11

Nogami, Tadahiko, Ichiro Nakamura, Hiroyuki Sadamori, Hironori Shimogama, and Hiroyuki Sato. "Development of Directly Operated Rotary Servo Valve. 1st Report. Structure and Performance of Rotary Servo Valve." Transactions of the Japan Society of Mechanical Engineers Series C 61, no. 584 (1995): 1431–36. http://dx.doi.org/10.1299/kikaic.61.1431.

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12

CUI, Jian. "High-pressure Bi-directional Rotary Proportional Solenoid for Rotary Servo Valve." Chinese Journal of Mechanical Engineering 44, no. 09 (2008): 230. http://dx.doi.org/10.3901/jme.2008.09.230.

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13

Zhang, Lingtan, Yue Shen, Long Wang, Jia Jia, and Lingzhi Wei. "Rotation Speed Control of the Rotary Valve in MWD Tools Based on Speed Feedforward Compensation." Mathematical Problems in Engineering 2021 (April 5, 2021): 1–8. http://dx.doi.org/10.1155/2021/5565672.

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The rotary valve speed control, seriously affected by the nonlinear characteristic of rotary valve load torque, affects the generation of drilling fluid pressure phase shift keying (PSK) signal and its quality. The calculation model feedforward of the load torque acts on the speed control system and enables the motor voltage to change according to the law of calculation model, and the linearization correction of the speed system is performed. Additionally, the flow measurement is introduced into the calculation model of the load torque to track the load torque change with the flow, suppressing the influence of large changes in flow rate on open-loop control of rotary valve speed. The closed-loop proportional-integral-derivative (PID) control is formed by negative feedback of speed, and the PID parameter value rule is established based on the rapid decay control of transient component in the rotary valve speed step response, which speeds up the tracking of the rotary valve speed following the control voltage pulse and reduces the distortion of the drilling fluid pressure PSK signal, increasing the frequency of the drilling fluid pressure carrier and improving the transmission rate of downhole information. Simulink simulation indicates that the closed-loop PID control of rotary valve speed can track the change of control voltage pulse quickly and strongly suppress the interference influences from flow measurement error and load torque calculation model deviation.

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14

Zhang, Yuan Shen, Xue Ping Xian, and Jie Yin. "Modeling Analysis and Experiment Research on Rotary Motor Buffer Overflow Valve." Applied Mechanics and Materials 709 (December 2014): 68–73. http://dx.doi.org/10.4028/www.scientific.net/amm.709.68.

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This paper studies a buffer overflow valve that is attached to a hydraulic rotary motor which could reduce high hydraulic impact when the hydraulic rotary motor starts, brakes or suddenly reverses. A rotary motor buffer overflow valve was modeled and simulated using a computer software, AMESim, and the relation of the buffer overflow valve to the hydraulic impact experienced by the motor was analyzed. The cushioning property of the buffer overflow valve of a rotary motor is verified by using an excavator. It is concluded that having a reasonable design of the buffer overflow valve’s maximum displacement for the buffer set and diameter size for the buffer damping hole, it can reduce the pressure impact experienced by the hydraulic rotary motor and improve its operating performance, which also improves the service life of the system or its hydraulic components.

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15

Xu, Su Ying. "Research for Guide Groove Configuration of Rotary Valve." Advanced Materials Research 989-994 (July 2014): 2874–77. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.2874.

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Rotary valve is a device to achieve fast commutation hydraulic transmission . Rotary valve is driven by a hydraulic motor drive and can achieve rapid conversion of the hydraulic circuit . Rotary valve spool by a rotating shaft , housing , shafts and bearings and other components. Guide grooves machined on the spool shaft is evenly distributed for hydraulic cylinder into the oil and return oil conversion. The coordinate gap between the spool shaft and valve chamber bore Because will affect the leakage in the leak. How to improve the guide groove structure? We can put the guide groove by high and low partition instead of overlapping arrangement. Reducing leakage within the valve chamber and Meet with the requirements of the spool shaft and valve chamber bore.

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16

Zhou, Qu Zhu. "The Simulation Design of the Rotary Valve of Hydraulic Power Assisted Steering System Based on the VB." Advanced Materials Research 69-70 (May 2009): 641–44. http://dx.doi.org/10.4028/www.scientific.net/amr.69-70.641.

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That automobile steering system are designed to suitable or not have a direct impact on vehicle safety, handling stability and driving comfort.The rotary valve of hydraulic power assisted steering system is one of the key components which affects the automotive steering performance. Design a reasonable spool valve in size can allow the car to get good properties . In this paper we use Visual Basic 6.0 to make a design calculations on rotary valve firstly, and then use the VB to carry out the numerical simulation on the steering performance of rotary valve and fitting the performance curve secondly, This method raised the design precision of the rotary valve, the design calculations is simplified.

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17

Zhang, Lei, Cun Yun Pan, Xiao Chong Wang, Hao Deng, and Hu Chen. "Dynamic Study of Valve Train for Rotary Piston Engine." Applied Mechanics and Materials 184-185 (June 2012): 170–74. http://dx.doi.org/10.4028/www.scientific.net/amm.184-185.170.

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Rotary Piston Engine is a new kind of rotary engine. To analyze the dynamic character of the valve system, kinematics equations are established using dynamical method. Dynamic response of the valve is studied by calculating the outcome using numerical method.FFT analysis is applied here to analyze the response curve. The result shows that the Valve Train covers the basic need, but the dynamic performance of the system still could be improved.

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18

Martynowicz, Paweł, Sławomir Kciuk, and Arkadiusz Mężyk. "Rotary Shock-Absorber with Magnetorheological Valves." Advanced Materials Research 628 (December 2012): 505–11. http://dx.doi.org/10.4028/www.scientific.net/amr.628.505.

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The paper analyses the problem of design of the magnetorheological (MR) fluid valve to be constrained within the cylindrical hole in the stationary barrier of rotary shock-absorber. The main objective is to maximise valve’s dynamic range (i.e. controllable/passive ratio of shock-absorber’s resistance torque) thus to maximise controlled part of the pressure drop along the MR valve. To obtain this, a special type of two-winding configuration with annular fluid gap is proposed.

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19

LIU, Yi. "Pulse Wave Generation Method Using Rotary Valve Control." Journal of Mechanical Engineering 54, no. 20 (2018): 279. http://dx.doi.org/10.3901/jme.2018.20.279.

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20

Hruzik, Lumir, Adam Burecek, Lukas Dvorak, Kamil Fojtasek, Peter Monka, Martin Vasina, and Miroslav Bova. "VALVE CONTROL OF DRIVE WITH ROTARY HYDRAULIC MOTOR." MM Science Journal 2019, no. 2 (June 4, 2019): 2902–9. http://dx.doi.org/10.17973/mmsj.2019_06_201882.

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21

Thayer, Orla E. "Rotary sound path selector valve with biased rotor." Journal of the Acoustical Society of America 88, no. 2 (August 1990): 1196–97. http://dx.doi.org/10.1121/1.399797.

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22

Wang, He, Guofang Gong, Hongbin Zhou, Wei Wang, and Yi Liu. "A rotary valve controlled electro-hydraulic vibration exciter." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 230, no. 19 (August 9, 2016): 3397–407. http://dx.doi.org/10.1177/0954406215615156.

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When sinusoidal vibration waveform is required, the frequency bandwidth of conventional electro-hydraulic vibration exciter controlled by servo valve is always limited to a rather narrow range due to the limits of slide valve structure and response speed, and no parameter is available for defining and evaluating the waveform quality. In this paper, a novel electro-hydraulic vibration exciter controlled by electromotor driven rotary valve is proposed to significantly extend the frequency range compared to the conventional servo valve controlled counterpart. Total harmonic distortion (THD) theory which is usually used to cope with voltage and current in electric system is borrowed to evaluate the quality of theoretical and experimental vibration waveforms at different supply pressures and vibration frequencies, quantitatively and qualitatively. The results show that the waveform quality is mainly influenced by the 3rd harmonic resonance. The proposed vibration exciter can output sinusoidal waveform with THD less than 5% at the vibration frequency higher than 70 Hz. In this frequency domain, the supply pressure has an extremely low impact on the THD of the waveform. The amplitude of the waveform can be adjusted by changing the supply pressure with almost no effect to the waveform quality at a certain vibration frequency.

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23

Moghadam, Mahdi Esmaily, and Mohammad Behshad Shafii. "Rotary Magnetohydrodynamic Micropump Based on Slug Trapping Valve." Journal of Microelectromechanical Systems 20, no. 1 (February 2011): 260–69. http://dx.doi.org/10.1109/jmems.2010.2090500.

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24

Li, Yuesong. "Steady-state modelling and performance of a rotary direct drive digital valve." Measurement and Control 53, no. 3-4 (January 6, 2020): 311–19. http://dx.doi.org/10.1177/0020294019866852.

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A rotary direct drive digital valve driven by a stepper motor was proposed. By analysing its working principle, the steady-state mathematical model reflecting the relationship between the pressure, the flow and the angular displacement was deduced. Based on this mathematical model, the models of the null valve coefficients, the zero leakage flow and the steady-state flow torque were given. The simulation shows that the relationship between the pressure and the flow of the rotary valve is nonlinear; however, under a constant load pressure, the flow characteristics and the steady-state flow torque characteristics of the rotary valve with rectangular throttle orifices are linear. The experimental results show that the flow is directly proportional to the steps of the stepper motor, and the proposed mathematical models are valid.

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25

Somsuk, Nisakorn, Teerapot Wessapan, and S. Teekasap. "Design and Development of a Rotary Airlock Valve for Using in Continuous Pyrolysis Process to Improve Performance." Advanced Materials Research 383-390 (November 2011): 7148–54. http://dx.doi.org/10.4028/www.scientific.net/amr.383-390.7148.

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A rotary airlock valve is a widely used device in material handling processes. It can be applied to the conveying of pyrolyzing wood chips into pyrolysis ovens for wood vinegar production. In a pyrolysis process, the process conducted in a closed system, under limited amount of air and high temperature conditions, and then a rotary airlock valve is provided for conveying pyrolyzing wood chips to be pyrolyzed. This research aims to design and develop a rotary airlock valve to achieve a uniform feed and an airlock operation (feeding without leaking), and consequently to improve its performance, for using in continuous pyrolysis process, in which a continuous material feeding is required. Due to the better airlock the better pyrolysis product yields. The rotary airlock valve is designed by concept of minimum clearance between the blade tips and the housing, along with using a rotor with the adjustable and replaceable blade tips mounted on blades welded to a rotor shaft, and a packing seal, in the closed rotor, and thus minimize leakage. According to the airlock performance test results of the developed rotary airlock valve, its performance improved approximately 60% when compared to the conventional counterpart. In this paper, conclusions for future research are described.

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26

Luo, Yan Lei, Cong Guo Xu, and Qiu Yan Zhang. "Research on Dynamic Characteristics of Anti-Reverse Valve for Hydraulic Excavator Rotary Motor." Advanced Materials Research 871 (December 2013): 290–95. http://dx.doi.org/10.4028/www.scientific.net/amr.871.290.

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Hydraulic excavator slewing system is an important component of the excavator and its core-component is the rotary motor. When the rotary hydraulic system starts, stops, and reciprocating works, dynamic characteristic of rotary motor anti-reverse valve has a great influence for working condition of the whole system. Through researching working principle of hydraulic system anti-reverse valve, establish dynamic mathematical model of anti-reverse valve, analyze dynamic response of the model, and get the theoretical foundation of the impact of anti-reverse valve middle chamber throttle opening on hydraulic system. According to the actual working condition of the excavator slewing hydraulic system, establish the system AMESim simulation model, take different parameters of the anti-reverse valve throttle opening, conduct simulation and analysis of the anti-reverse valve characteristics, and validate throttle opening has a great influence on dynamic characteristics of the hydraulic system.

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27

Wu, Jianhua, Gang Wang, Yuyong Li, Ang Chen, Qiang Gao, Zhenhua Chen, and Bo Jiang. "Experimental study on P-V diagram and valve displacement of a HC290 rotary compressor." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 229, no. 17 (January 7, 2015): 3113–24. http://dx.doi.org/10.1177/0954406214566220.

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HC290 is a substitute for R22 and R410A for small heat pumps, room air conditioners, and light commercial refrigeration equipment since it has a negligible environmental impact and high efficiency. The performance, P-V diagram and valve dynamic displacement of a rotary compressor using R22 and R290 as the refrigerant, under five different operating conditions, were measured and analyzed in this paper to help understand the characteristics of internal thermodynamic process and the distribution of indicated power losses. Further, a new method for analyzing the P-V diagram of a rotary compressor was proposed. Compared with the R22 compressor, some conclusions about the discharge process starting angle, dynamic variation of pressure in the cylinder, volumetric efficiency, indicated efficiency, and loss distribution of the R290 rotary compressor under high efficiency conditions were given. The performance variation of the R290 compressor under other conditions was explained. Several measures to increase the energy efficiency of the R290 rotary compressor were proposed.

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28

NAKAMICHI, Tatsuya, Ken MATSUOKA, Jiro KASAHARA, Akiko MATSUO, and Ikkoh FUNAKI. "Performance Validation of Coaxial-Rotary-Valve Pulse Detonation Engines." AEROSPACE TECHNOLOGY JAPAN, THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES 10 (2011): 107–12. http://dx.doi.org/10.2322/astj.10.107.

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29

Hasegawa, Tadahiro, Kenichiro Nakashima, Fumiyuki Omatsu, and Koji Ikuta. "Multi-directional micro-switching valve chip with rotary mechanism." Sensors and Actuators A: Physical 143, no. 2 (May 2008): 390–98. http://dx.doi.org/10.1016/j.sna.2007.10.082.

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30

Hamanaga, Shinji. "Structure of rotary valve assembly used in wind instrument." Journal of the Acoustical Society of America 90, no. 1 (July 1991): 627. http://dx.doi.org/10.1121/1.402351.

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31

ICHIYANAGI, Takayoshi, Takao NISHIUMI, Nobuyuki KINDO, and Haruhisa TAKATANI. "3111 Basic Characteristics of a Hydraulic Rotary Control Valve." Proceedings of the JSME annual meeting 2006.2 (2006): 325–26. http://dx.doi.org/10.1299/jsmemecjo.2006.2.0_325.

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32

Wypych, P. W. "Effect of Rotary Valve Leakage on Pneumatic Conveying Performance." Particulate Science and Technology 26, no. 3 (April 29, 2008): 257–72. http://dx.doi.org/10.1080/02726350802028975.

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33

HIROTA, Michinobu, Takafumi YAMAGUCHI, and Ryuichi SAGAWA. "803 Noise Occurred on Rotary Valve of Hydraulic Motor." Proceedings of Conference of Kansai Branch 2001.76 (2001): _8–5_—_8–6_. http://dx.doi.org/10.1299/jsmekansai.2001.76._8-5_.

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34

Hu, YS, J. Xu, O. X. Yang, J. Gao, X. Y. Zhang, and Y. P. Hu. "Mechanical and deformation characteristics of rotary compressor discharge valve." IOP Conference Series: Materials Science and Engineering 1180, no. 1 (September 1, 2021): 012018. http://dx.doi.org/10.1088/1757-899x/1180/1/012018.

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35

Imaduddin, Fitrian, Saiful Amri Mazlan, Hairi Zamzuri, and Mohd Azizi Abdul Rahman. "Bypass Rotary Magnetorheological Damper for Automotive Applications." Applied Mechanics and Materials 663 (October 2014): 685–89. http://dx.doi.org/10.4028/www.scientific.net/amm.663.685.

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A novel concept of bypass rotary Magneto-rheological (MR) damper is studied in the automotive suspension application. The proposed design is developed based on a vane-type damper structure with an MR control valve located outside of the damper. The design is intended to enhance the ease of maintenance and to reduce the thermal effect from the coil to the MR fluid. The valve is the key component of the damper that exploits the advance characteristics of MR fluid in which have sensitive rheological properties to magnetic field. The ability of the valve to modify the strength of magnetic field has given an advantage that the valve can be operated without any moving parts. The elimination of these parts in the throttling mechanism of the valve will provide benefit in terms of product lifetime and responsiveness. The main objective of this paper is to elaborate the advantages of the bypass rotary MR damper and to demonstrate the damper performance through force-velocity characteristics. The analytical model of the damper is developed and used in the determination of the force-velocity curves and the equivalent damping coefficients.

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36

Wu, Jin Jun, You Sheng Yang, Jing Yuan Li, Ge Gang Yu, and Zong Xia Jiao. "Numerical Study of the Characteristics of Rotary Spool Orifice in Water Hydraulics." Applied Mechanics and Materials 716-717 (December 2014): 662–69. http://dx.doi.org/10.4028/www.scientific.net/amm.716-717.662.

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The rotary control orifice, in which the relative angular openings are adjusted by the rotary motion of the spool, thus controlling the flow area and the flow passing through, is a basic control element of hydraulic control valve. It has several advantages, such as little minimal steady flow rate, good anti-contamination, small driving power, small opening and shutting shock, and etc., over the translational control orifice. The working medium is tap water. A model is developed and numerical studies are carried out to investigate the hydrodynamic characteristics of the rotary control orifice, including flow and pressure field, flow characteristics, flow torque. The relationships between the flow and the pressure drops, the efflux angle and the angular openings, the steady-state flow torque and the pressure drops as well as the angular openings are obtained. The results show that a) the orifice geometries have great effects on the efflux angle and the steady-state flow torque; b) Under the same openings and flow direction, the efflux angle is almost constant under different pressure drops. It is larger for meter-in flow than for meter-out flow and decreases with the increase of openings; c) The steady-state flow torque (including meter-in flowTsfinand meter-out flowTsfout) is proportional to the pressure drops and first increases and then decreases with the increase of openings, finally reaches zero at the fully opened position; d) The friction moment is proportional to the rotary speed so as the transient flow induced moment to the rotary acceleration. The in-depth study of the drag moment of rotary control orifice helps to design high performance rotary servo valve for robots. The in-depth study of the rotary control orifice provides a basis for developing high performance rotary control valve.

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37

Zhu, Yuchuan, Zhenyu Wang, and Shangshu Fei. "Development of a magnetostrictive material–based electro-hydrostatic actuator with an active rotary rectifying valve." Proceedings of the Institution of Mechanical Engineers, Part I: Journal of Systems and Control Engineering 233, no. 8 (November 16, 2018): 994–1008. http://dx.doi.org/10.1177/0959651818809185.

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A magnetostrictive material–based electro-hydrostatic actuator with an active rotary valve for fluid rectification is presented in this article, which consists of a magnetostrictive material–based pump, an active rotary valve and a hydraulic cylinder. First, the magnetostrictive material–based pump plunger motion model is established, and the factors that affect the phase lag between the magnetostrictive material–based pump plunger displacement and the input voltage are discussed. Second, the flow area model of the active rotary valve and the kinetic model of the cylinder are established. After that, the phase compensation for the input voltage that influences the synchronous motion between the magnetostrictive material–based pump plunger and the valve spool is investigated. Finally, the simulation model is built in MATLAB/Simulink, and the results are subsequently verified with experimental data. The results indicate that the phase lag of magnetostrictive material–based pump plunger output displacement is mostly influenced by magnetization with a low driving frequency and by an eddy current with a high driving frequency. The compensation angle for the input voltage affects the output flow of the magnetostrictive material–based electro-hydrostatic actuator and the moving direction of the cylinder piston rod. For a magnetostrictive material–based electro-hydrostatic actuator rectified by the active rotary valve, at the driving frequency of 200 Hz, the peak output flow can reach 2.4 L/min, which is much higher than 1.1 L/min of a magnetostrictive material–based electro-hydrostatic actuator rectified by the passive reed valve.

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38

Ruan, J., R. Burton, P. Ukrainetz, and Y. M. Xu. "Two-dimensional pressure control valve." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 215, no. 9 (September 1, 2001): 1031–38. http://dx.doi.org/10.1177/095440620121500903.

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The two-dimensional pressure control valve is a piloted control valve which functions by using both linear and rotary motions of a single spool. A groove on the spool land, incorporating a sensing channel, forms the pilot stage to control the pressure of a spool chamber, while the load pressure is fed to the other spool chamber. To sustain the balance of the force across the spool, the load pressure must follow the change of pressure variation along the groove while the spool is in rotary motion. The geometric parameters of the groove and the spool-to-sleeve clearance have significant effects on both the static and dynamic characteristics of the valve. Increasing the sectional size of the groove results in a large Reynolds number and the static property of the valve thus changes from that of linearity owing to the entrance effect. The linearity of the static property is also affected by the leakage through the spool-to-sleeve clearance. The dynamic characteristics of the valve are dependent upon both the structural parameters and the tune constant of the load. The stability and dynamic response were investigated under different structural parameters and time constants of the load using both linear theory and simulation methods. Experiments were designed to obtain the static and dynamic characteristics of the valve and the leakage through the pilot. A balance should be made between the linearity of the static property and the response speed; it was found that both fairly linear static and desired dynamic characteristics could be simultaneously maintained for the two-dimensional pressure control valve.

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39

Qiu, Li Jun, and Su Ying Xu. "Exploration on the Dual Spool Design of Rotary Hydraulic Valve." Advanced Materials Research 989-994 (July 2014): 2845–48. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.2845.

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There is also a monomer leak valve body on the single spool, Leakage between the guide groove affected the layout of the form guide groove. Two end faces of the single spool work in the different fluid pressure in the chamber. When the working pressure of the hydraulic system is high, the pressure differential will cause the spool bearings subject to large axial force. It will increase the resistance torque of bearing rotation. Effects of axial force also limits the increase spool diameter. Double spool valve with two spool rotation series manner. Each spool in the same pressure in the working medium. Eliminating the axial force of the valve body due to fluid pressure differential generated, also reduces the resistance to rotation of the spool moment and the impact of guide groove arrangement by oil leak, and also the commutation frequency of the rotary valve can be improved by increasing the diameter of the spool.

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40

MUROI, Yuuta, Saku KIMURA, Shinichi MAEDA, and Tetsurou OBARA. "Operation of a pulse detonation engine with a rotary valve." Proceedings of Conference of Kanto Branch 2017.23 (2017): 604. http://dx.doi.org/10.1299/jsmekanto.2017.23.604.

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41

Chow, P. H. P., H. C. Watson, and T. Wallis. "Combustion in a high-speed rotary valve spark-ignition engine." Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 221, no. 8 (August 1, 2007): 971–90. http://dx.doi.org/10.1243/09544070jauto407.

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The current paper describes a study of combustion in the Bishop rotary valve engine by means of computation simulations. The combustion model was developed for this research at speeds up to 18 000 r/min and the results from the simulation were compared with experimental data. Sensitivity studies were performed in order to investigate the parametric effects on the combustion simulation of the engine. The major finding of this study was that convection of the flame kernels occurs and has a strong influence on the performance of the engine. The results indicated some insights as to how the combustion process of the engine can be improved.

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42

SUZUKI, Kenji, and Tatsuya YONEZAWA. "307 Design of a rotary servo valve for water hydraulics." Proceedings of Conference of Chugoku-Shikoku Branch 2015.53 (2015): _307–1_—_307–2_. http://dx.doi.org/10.1299/jsmecs.2015.53._307-1_.

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43

MIZUNO, Masahiro, Fumihiko NIMURA, Kenta SEKI, and Makoto IWASAKI. "G1000103 Compensation Approach for Nonlinearity in Rotary-driven Servo Valve." Proceedings of Mechanical Engineering Congress, Japan 2015 (2015): _G1000103——_G1000103—. http://dx.doi.org/10.1299/jsmemecj.2015._g1000103-.

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44

Royston, Tom, and Rajendra Singh. "Development of a Pulse-Width Modulated Pneumatic Rotary Valve for Actuator Position Control." Journal of Dynamic Systems, Measurement, and Control 115, no. 3 (September 1, 1993): 495–505. http://dx.doi.org/10.1115/1.2899128.

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A new concept in the directional flow control of a high speed pneumatic actuation system is proposed. Two recent developments reported in the literature, namely (i) the application of pulse-width modulation techniques to on-off pneumatic valves and (ii) the introduction of a high speed rotary air valve, are merged in the design of a novel rotary flow control valve with built-in pulse-width modulation. Valve feasibility is demonstrated experimentally through the closed-loop position control of a pneumatic actuator. Static and dynamic performance characteristics as predicted by a detailed nonlinear lumped parameter model, compare favorably with measured data. Additionally, a simple linear time-invariant model, with a few empirical parameters, of the system is developed and validated through comparison with experiment and the nonlinear model. Then, several system design improvements based on this simple linear model are implemented and evaluated with the detailed nonlinear model.

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45

Yang, Jia. "Hydraulic Vibration Exciter and Hydraulic Circuit Design Research." Advanced Materials Research 989-994 (July 2014): 2904–7. http://dx.doi.org/10.4028/www.scientific.net/amr.989-994.2904.

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Pressure of the liquid is used as power source of hydraulic vibration exciter. Rotary directional control valve is the realization of oiling-way veversing components . The piston is reciprocated under the influence of the change of the hydraulic. The reciprocating movement of the piston is a result of fluid pressure.Working area of the piston multiplied by the pressure of the liquid is equal to the thrust of the piston.Displacement response of the vibration exciter can be simplified to the second-order vibration systems.Elastic beam is used as limit components of piston of vibration exciter,the piston vibration waveform is a sine wave .The volume of elastic beam is smaller than the volume of fluid elastic element . The hydraulic circuit is a dual pump fuel supply circuits.Pumps are used to supply rotary valve and hydraulic cylinder .Dual pumps fuel supply system is conducive to control fluid pressure and flow of the rotary valve and vibration piston.

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46

Petukhov, Dmitry, Leonie Korn, Marian Walter, and Dmitry Telyshev. "A Novel Control Method for Rotary Blood Pumps as Left Ventricular Assist Device Utilizing Aortic Valve State Detection." BioMed Research International 2019 (December 11, 2019): 1–12. http://dx.doi.org/10.1155/2019/1732160.

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A novel control method for rotary blood pumps is proposed relying on two different objectives: regulation of pump flow in accordance with desired value and the maintenance of partial support with an open aortic valve by the variation of pump speed. The estimation of pump flow and detection of aortic valve state was performed with mathematical models describing the first- and second generation of Sputnik rotary blood pumps. The control method was validated using a cardiovascular system model. The state of the aortic valve was detected with a mean accuracy of 91% for Sputnik 1 and 96.2% for Sputnik 2 when contractility, heart rate, and systemic vascular resistance was changed. In silico results for both pumps showed that the proposed control method can achieve the desired pump flow level and maintain the open state of the aortic valve by periodically switching between two objectives under contractility, heart rate, and systemic vascular resistance changes. The proposed method showed its potential for safe operation without adverse events and for the improvement of chances for myocardial recovery.

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Chen, Li Dan, and Jian Ruan. "Experimental Study of New High-Frequency Valve." Applied Mechanics and Materials 63-64 (June 2011): 668–72. http://dx.doi.org/10.4028/www.scientific.net/amm.63-64.668.

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A double degree of freedom valve was designed. It has the functions of the radial direction rotary motion and the axial translation motion. In the electro-hydraulic vibrator, 2D valves are used to control hydraulic cylinder to achieve high-frequency vibration. The vibration frequency and amplitude are controlled by the speed and axial displacement in the spool valve core respectively. The vibration-exciting force signals and the displacement signals are obtained by adapting card under Delphi development. The real excited waveforms are analyzed, compared and studied.

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48

SUZUKI, Kenji. "Angle Control of a Water Hydraulic Semi-rotary Motor with a Rotary-type Servo Valve for Water Hydraulics." Proceedings of Mechanical Engineering Congress, Japan 2016 (2016): J1110104. http://dx.doi.org/10.1299/jsmemecj.2016.j1110104.

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49

Zhao, Wei, and Jian Ruan. "Experimental Study of the Dynamic Properties of 2D Servo Valve with Different Pilot Structure." Applied Mechanics and Materials 687-691 (November 2014): 326–30. http://dx.doi.org/10.4028/www.scientific.net/amm.687-691.326.

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The mechanical part of the 2D servo valve is mainly a hydraulic servo screw mechanism, by which the rotary motion of the spool is turned to linear sliding. A step motor is utilized to rotate the spool and functions as the electrical-to-mechanical transformer. For studying the different influences of 2D valve's pilot circular and full arch structure on its dynamic characteristics of servo screw mechanism, a step response and sine response experiment device was designed, and the experiments were done. The experimental results show that the full arch structure type step response time is about 1.6 ms (abbreviation of millisecond), the circular type about 3ms, proved that the full bow structure can significantly improve the dynamic characteristic of servo screw mechanism, it is also be proved by sinusoidal frequency response experiments.

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50

Yu, Xiaoling, Yumei Ren, Qin Tan, Zhao Lu, Xiaofei Jia, and Xiaolin Wang. "Study on the torsional movement of a reed valve in a rotary compressor." Advances in Mechanical Engineering 10, no. 6 (June 2018): 168781401877840. http://dx.doi.org/10.1177/1687814018778402.

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Torsional movement makes the motion of a reed valve very complex and unmanageable in a rotary compressor. However, there is little information on the torsional movement of the reed valve in comparison to the valve displacement and velocity in the literature. This article investigates the torsional movement of a reed valve in a rotary compressor under different operating conditions using a fluid–structure interaction model. The phenomenon of the torsional movement of the reed valve during an operating cycle in the compressor was first studied. Then, the impact process and stress between the reed and the retainer were examined as the torsional movement was considered. The effect of the key parameters (including the asymmetric shape of the discharge chamber, eccentric reed mounting, and compressor working conditions) on the valve torsional movement was evaluated. Results showed that the impact stress of the first contact between the reed and the retainer increased as the torsional movement increased. The asymmetric shape of the discharge chamber and the eccentric mounting of the reed had a large influence on the torsional movement of the reed valve, while the rotational speed of the compressor was the key factor that significantly affected the impact stress.

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