Configuration Design and Performance Test of Electromechanical Hydraulic Hybrid Driving Linear Actuator

doi:10.3901/JME.2022.05.212

Abstract

Abstract: Aiming at the problems of the large throttling loss of valve controlled hydraulic cylinder and weak load carrying capacity of electro-mechanical actuator, the two kinds of actuators are integrated into a new electromechanical hydraulic hybrid driving linear actuator by rigidly connecting hydraulic cylinder piston with electro-mechanical actuator screw nut. The actuator is mainly composed of electro-mechanical driving mechanism and hydraulic driving mechanism. The electro-mechanical driving mechanism is used for motion control, and the hydraulic driving mechanism with power amplification function is used to improve the loading capacity of the actuator. In the research, the piston rod is designed as a hollow structure for the installation of the long-stroke screw. The piston is added to some oil holes for the rapid flow of oil. The two sides of the piston are designed to be filled with high-pressure oil through the seal design. The strength of the new actuator parts is checked by ANSYS Workbench finite element software. The actuator prototype is manufactured, and the performance test platform is built. The test results show that the designed actuator has good sealing effect, smooth starting and braking, and good velocity and position control characteristics. The hydraulic driving mechanism has obvious force increasing effect and less throttling loss. The proposed actuator combines the advantages of hydraulic drive and electro-mechanical drive, which provides a new idea for realizing high energy efficiency and power density linear drive.

Key words: electromechanical hydraulic hybrid driving linear actuator, electro-mechanical actuator, hydraulic cylinder, integration, structure design

CLC Number:

TH137

QIAO Shu-fei, HAO Yun-xiao, QUAN Long, GE Lei, XIA Lian-peng. Configuration Design and Performance Test of Electromechanical Hydraulic Hybrid Driving Linear Actuator[J]. Journal of Mechanical Engineering, 2022, 58(5): 212-222.

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