When an output curve force is applied to a horizontal servo cylinder with a heavy load, the piston rod bears a dynamic partial load based on the installation and load characteristics, which significantly affects the frequency response and control accuracy of the servo cylinder. Based on this partial load, increased friction can lead to cylinder bore scuffing, leakage, lack of output power, or even system failure. In this paper, a novel asymmetric static-pressure support structure is proposed based on the principle of hydrostatic support. The radial component force of a dynamic partial load is balanced by cooperation between the support oil cushion of the variable hydraulic pressure support structure, oil cushion of the supportive force, and the damper. Adaptive control of the servo cylinder piston rod, guide sleeve, and piston, as well as the cylinder oil film friction between lubricated surfaces is achieved. In this paper, theoretical design and analysis of the traditional hydrostatic bearing structure and novel structure are presented. A hydraulic dynamic shear scissor is used as a research target to derive a structural dynamic model. Comparative simulations are performed using Matlab Simulink. Additionally, flow field analysis of the novel structure is performed, which verifies the rationality and feasibility of the proposed structure and system.
Linan Ma
,
Qingxue Huang
,
Lifeng Ma
,
Qiangjun Ma
,
Wenze Zhang
,
Heyong Han
. Structural Design and Dynamic Characteristics of Overloaded Horizontal Servo Cylinder for Resisting Dynamic Partial Load[J]. Chinese Journal of Mechanical Engineering, 2019
, 32(1)
: 11
-11
.
DOI: 10.1186/s10033-019-0326-x
[1] B C Liu, L S Yin, H Z Fan, et al. A brief analysis on cause of lateral force in hydraulic cylinder and the counter measures. Construction Machinery and Equipment, 2013(44): 11-14. (in Chinese)
[2] C C Zhan, J H Deng, K S Chen. Research on low-friction and high-response hydraulic cylinder with variable clearance. Journal of Mechanical Engineering, 2015, 51(24): 161-167. (in Chinese)
[3] H Nabae, M Hemmi, Y Hirota, et al. Super-low friction and lightweight hydraulic cylinder using multi-directional forging magnesium alloy and its application to robotic leg. Advanced Robotics, 2018, 32(9): https://doi.org/10.1080/01691864.2018.1463868.
[4] Y B Yin, T Tao, K W Zhu, et al. Characteristics of hydrostatic bearing of anti-radial load hydraulic cylinder. Fluid Power Transmission & Control, 2016, 6(79): 12-18. (in Chinese)
[5] Y L Zeng, C J Yao, K S Chen, et al. Simulation and analysis on gap seal of the hydraulic cylinder support guide bush. Wuhan Iron and Steel Corporation Technology, 2017, 55(3): 58-62.
[6] X M Wu, Z L Zhao, S W Zheng, et al. Use of non-contact seal in servo cylinder and its influence on low speed stability of hydraulic system. Machine Tool & Hydraulics, 2015, 43(13): 72-74. (in Chinese)
[7] F M Jian, Z W Wei, Z L Ying. Experimental and theoretical investigation on the sealing performance of the combined seals for reciprocating rod. Journal of Mechanical Science and Technology, 2012, 26(6): 1765-1772.
[8] X Zhao, Z Hu, R Li, et al. Internal leakage fault feature extraction of hydraulic cylinder using wavelet packet energy. Parallel Computational Fluid Dynamics, Springer Berlin Heidelberg, 2014: 363-375.
[9] J M Hale, E Y Sim. Self-weight loading of horizontal hydraulic cylinders with axial load. Journal of Physics: Conference Series, 2016, 721(1): https://doi.org/10.1088/1742-6596/721/1/012006.
[10] L F Lu, C L Chen, L C Zeng, et al. Simulation and characteristics analysis of piston rod hydrostatic support seal for gap seal hydraulic cylinder. Chinese Hydraulics & Pneumatics, 2012(12): 126-129.
[11] Z B Chu, Y L Yang, Q X Huang, et al. Kinematical analysis of PR-11RⅢ level composite rodlinkage mechanism. Journal of Sichuan University (Engineering Science Edition), 2015, 47(6): 165-171.
[12] J He, J Zhao, Q X Meng, et al. The design of a new type servo oil cylinder for underwater docking device. Chinese Hydraulics & Pneumatics, 2006(8): 62-63.
[13] J L Xiao, H Zhou. Application of liquid hydrostatic technology in servo hydraulic cylinder. Machine Tool & Hydraulics, 1994(1): 43-47.
[14] C R Zhai, R H Zhang. A new type of mechano-electronic integrated servo cylinder used for flight simulator. Machine Tool & Hydraulics, 1999(1): 13-16.
[15] C J Chen. Simulation of the flow field of hydrostatic support seal for servo hydraulic cylinder based on fluent. Wuhan: Mechanical and Electronic Engineering of Wuhan University of Science and Technology, 2012: 2-2, 8-10, 20-24.
[16] Y Q Wang, X Zhou, Z F Liu, et al. Study on dynamic characteristics of hydrostatic thrust bearing with servo control. Journal of Sichuan University: Engineering Science Edition, 2012, 44(2): 201-205. (in Chinese)
[17] H J Liu, H Guo, S L Zhang. Research on static characteristics of deep/shallow pockets hybrid, bearing based on FLUENT. Journal of Lubrication Engineering, 2013, 38(10): 35-38. (in Chinese)
[18] Y Yi, C B Yin, Li Ping, et al. Analysis on characteristics of oil film in hydrostatic support system. Journal of Nanjing Tech University (Natural Science Edition), 2014, 36(2): 35-39. (in Chinese)
[19] H Y Han, Q X Huang, L F Ma, et al. Research on the hydraulic system of hydraulic rolling shear. Journal of Sichuan University (Engineering Science Edition), 2011, 43(3): 239-243. (in Chinese)
[20] J B Lei, X Y Wang, Y J Pi. Sliding mode control in position control for asymmetrical hydraulic cylinder with chambers connected. Journal of Shanghai Jiaotong University, 2013, 18(4): 454-459.
[21] P Robert, A Harald. Comparison of nonlinear flatness-based control of two coupled hydraulic servo cylinders. IFAC Proceedings Volumes, 2014, 47(3): 10940-10945.
[22] Z L Zhang, S J Wu, J Y Zhong, et al. Optimal design of cushion system for high-speed and high-flow valve-controlled hydraulic cylinder. Journal of Central South University (Science and Technology), 2015, 46(10): 3646-3655. (in Chinese)
[23] Z Has, M F Rahmat. Robust tracking control of an electro-hydraulic actuator in the presence of friction and internal leakage. Arabian Journal for Science and Engineering, 2014, 39(4): 2965-2978.
[24] C Cristescu, R Radoi, C Dumitrescu, et al. Experimental research on energy losses through friction in order to increase lifetime of hydraulic cylinders. IOP Conference Series: Materials Science and Engineering, 2017, 174(1): https://doi.org/10.1088/1757-899x/174/1/012011.
[25] Y Zhou, B Q Sun, S J Wang, et al. Finite element analysis of sealing performance and frictional forces of hydraulic cylinder. Coal Mine Machinery, 2018, 39(03): 50-53. (in Chinese)
[26] Q Li, S Liu, X Pan, et al. A new method for studying the 3D transient flow of misaligned journal bearings in flexible rotor-bearing systems. Journal of Zhejiang University-Science (Applied Physics & Engineering), 2012, 13(4): 293-310.
[27] Q Li, G Yu, S Liu, et al. Application of computational fluid dynamics and fluid structure interaction techniques for calculating the 3D transient flow of journal bearings coupled with rotor systems. Chinese Journal of Mechanical Engineering, 2012, 25(5): 926-932.
[28] L F Ma, H Y Han, Q X Huang, et al. Analysis of commutation impact in hydraulic system of hydraulic rolling shear. Journal of Jilin University (Engineering and Technology Edition), 2012, 42(6): 1396-1401. (in Chinese)
[29] Z B Chu, Q X Huang, L F Ma, et al. Experimental study and simulation of kinetics on linkage structure of rolling-cut bilateral shear. Journal of Sichuan University (Engineering Science Edition), 2011, 43(1): 247-252.
[30] Y Zhou, B Q Sun, S J Wang, et al. Finite element analysis of sealing performance and frictional forces of hydraulic cylinder. Coal Mine Machinery, 2018, 39(3): 50-53. (in Chinese)
