The manufacturing of spiral groove structure of two-dimensional valve (2D valve) feedback mechanism has shortcomings of both high cost and time-consuming. This paper presents a novel configuration of rotary electro-mechanical converter with negative feedback mechanism (REMC-NFM) in order to replace the feedback mechanism of spiral groove and thus reduce cost of valve manufacturing. In order to rapidly and quantitative evaluate the driving and feedback performance of the REMC-NFM, an analytical model taking leakage flux, edge effect and permeability nonlinearity into account is formulated based on the equivalent magnetic circuit approach. Then the model is properly simplified in order to obtain the optimal pitch angle. FEM simulation is used to study the influence of crucial parameters on the performance of REMC-NFM. A prototype of REMC-NFM is designed and machined, and an exclusive experimental platform is built. The torque-angle characteristics, torque-displacement characteristics, and magnetic flux density in the working air gap with different excitation currents are measured. The experimental results are in good agreement with the analytical and FEM simulated results, which verifies the correctness of the analytical model. For torque-angle characteristics, the overall torque increases with both current and rotation angle, which reaches about 0.48 N·m with 1.5 A and 1.5°. While for torque-displacement characteristics, the overall torque increases with current yet decrease with armature displacement due to the negative feedback mechanism, which is about 0.16 N·m with 1.5 A and 0.8 mm. Besides, experimental results of conventional torque motor are compared with counterparts of REMC-NFM in order to validate the simplified model. The research indicates that the REMC-NFM can be potentially used as the electro-mechanical converter for 2D valves in civil servo areas.
[1] H Y Yang. Review of Intelligent Manufacturing and Intelligent Hydraulic Components. Chinese Hydraulic & Pneumatics, 2020, (1): 1–9. (in Chinese)
[2] P Tamburrano, A R Plummer, E Distaso, et al. A review of electro-hydraulic servovalve research and development. International Journal of Fluid Power, 2018: 1–23. https://doi.org/10.1080/14399776.2018.1537456.
[3] P Tamburrano, A R Plummer, E Distaso. A review of direct drive proportional electrohydraulic spool valves: industrial state-of-the-art and research advancements. Journal of Dynamic Systems, Measurement, and Control, 2019, 141(2): 020801.
[4] J J Vyas, B Gopalsamy, H Joshi. Electro-hydraulic actuation systems: Design, testing, identification and validation. Singapore: Springer Press, 2018.
[5] B Xu, J Shen, S H Liu, et al. Research and development of electro-hydraulic control valves oriented to Industry 4.0: A review. Chinese Journal of Mechanical Engineering, 2020, 33: 29.https://doi.org/10.1186/s10033-020-00446-2.
[6] Y B Yin. Electro hydraulic control theory and its applications under extreme environment. Oxford: Butterworth-Heinemann, 2019.
[7] R Amirante, E Distaso, P Tamburrano. Sliding spool design for reducing the actuation forces in direct operated proportional directional valves: Experimental validation. Energy Conversion and Management, 2016, 119: 399–410.
[8] S Z Zhang, N Z Aung, S J Li. Reduction of undesired lateral forces acting on the flapper of a flapper–nozzle pilot valve by using an innovative flapper shape. Energy Conversion and Management, 2015, 106: 835–848.
[9] N Z Aung, Q J Yang, M Chen, et al. CFD analysis of flow forces and energy loss characteristics in a flapper–nozzle pilot valve with different null clearances. Energy Conversion and Management, 2014, 83: 284–295.
[10] H Yang, W Wang, K Q Lu, et al. Cavitation reduction of a flapper-nozzle pilot valve using continuous microjets. International Journal of Heat and Mass Transfer, 2019, 133: 1099–1109.
[11] H Yan, F J Wang, C C Li. Research on the jet characteristics of the deflector–jet mechanism of the servo valve. Chinese Physics B, 2017, 26(4): 252–260.
[12] C M Li, Y B Yin, M Y Wang, et al. Influence of high temperature on couples matching and characteristics of jet pipe electrohydraulic servovalve. Journal of Mechanical Engineering, 2018, 54(20): 251–261. (in Chinese)
[13] J Ruan, R Burton, P R Ukrainetz. An investigation into the characteristics of a two dimensional “2D” flow control valve. Journal of Dynamic Systems Measurement and Control, 2002, 124(1): 214–220.
[14] F He, X Chen, P Y Lu, et al. Theoretical analysis and experimental study on two-dimensional cartridge servo valve. Acta Aeronautica et Astronautica Sinica, 2019, 40(5): 422590 (in Chinese). https://doi.org/10.7527/s1000-6893.2018.22590.
[15] Y Ren, J Ruan. Theoretical and experimental investigations of vibration waveforms excited by an electro-hydraulic type exciter for fatigue with a two-dimensional rotary valve. Mechatronics, 2016, 33: 161–172.
[16] X Q Zuo, J Ruan, G W Liu, et al. Characteristics of direct-acting airborne 2D electro-hydraulic pressure servo valve. Acta Aeronautica et Astronautica Sinica, 2017, 38(11): 421294. (in Chinese)
[17] Q H Zhang, W Xiong, J Ruan, et al. Research on 2D digital buffering valve for vehicle shift. Journal of Mechanical Engineering, 2018, 54(20): 206–212. (in Chinese)
[18] S Li, J Ruan, B Meng. Two-dimensional electro-hydraulic proportional directional valve. Journal of Mechanical Engineering, 2016, 52(2): 202–212. (in Chinese)
[19] A J Gong. Research on key technology of moving-coil proportional electromagnet. China: Zhejiang University, 2016. (in Chinese)
[20] D Ahn, H Kim, K Choi, et al. Design process of square column-shaped voice coil motor design for magnetic levitation stage. International Journal of Applied Electromagnetics and Mechanics, 2020, 62(3): 517–540.
[21] S Wu, Z X Jiao, L Yan, et al. Development of a direct-drive servo valve with high-frequency voice coil motor and advanced digital controller. IEEE/ASME Transactions on Mechatronics, 2014, 19(3): 932–942.
[22] J Cui, F Ding, Q P Li. Novel bidirectional rotary proportional actuator for electrohydraulic rotary valves. IEEE Transactions on Magnetics, 2007, 43(7): 3254–3258.
[23] J H Buscher, E Amherst. Complier: US, 5679989. 1997-10-21[2021-01-11]. http://www.pat2pdf.org/patents/pat5679989.pdf.
[24] B Meng, Y J Lai, X G Qiu. Regulation method for torque–angle characteristics of rotary electric–mechanical converter based on hybrid air gap. Chinese Journal of Mechanical Engineering, 2020, 33: 35.https://doi.org/10.1186/s10033-020-00452-4.
[25] Q F Zhang, L Yan, Z H Duan, et al. High torque density torque motor with hybrid magnetization pole arrays for jet pipe servo valve. IEEE Transactions on Industrial Electronics, 2019, 67(3): 2133–2142.
[26] S Li, Y Song. Dynamic response of a hydraulic servo-valve torque motor with magnetic fluids. Mechatronics, 2007, 17(8): 442–447.
[27] W Zhang, J Peng, S Li. Damping force modeling and suppression of self-excited vibration due to magnetic fluids applied in the torque motor of a hydraulic servovalve. Energies, 2017, 10(6): 749. https://doi.org/10.3390/en10060749.
[28] E Urata. Influence of unequal air-gap thickness in servo valve torque motors. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 2007, 221(11): 1287–1297.
[29] C Liu, H Jiang. Influence of magnetic reluctances of magnetic elements on servo valve torque motors. Chinese Journal of Mechanical Engineering, 2016, 29(1): 136–144.
[30] C Han, S B Choi, Y M Han. A piezoelectric actuator-based direct-drive valve for fast motion control at high operating temperatures. Applied Sciences, 2018, 8(10): 1806. https://doi.org/10.3390/app8101806.
[31] Z S Yang, Z B He, F B Yang, et al. Design and analysis of a voltage driving method for electro-hydraulic servo valve based on giant magnetostrictive actuator. International Journal of Applied Electromagnetics and Mechanics, 2018, 57(4): 1–18.
[32] G L Hu, K Y Zheng. Pressure drop and response time analysis of magnetorheological valve with mosquito-plate fluid flow channels. Transactions of the Chinese Society for Agricultural Machinery, 2019, 50(10): 401–409. (in Chinese)
[33] H Shi, B He, Z Wang, et al. Magneto-mechanical behavior of magnetic shape memory alloy and its application in hydraulic valve actuator. Journal of Mechanical Engineering, 2018, 54(20): 235–244. (in Chinese)
[34] B L Wang. Design basis of electromagnetic appliances. Beijing: National Defense Industry Press, 1989.
