Double-vane hydraulic self-servo oscillating cylinder

Abstract

The invention relates to a double-vane hydraulic self-servo oscillating cylinder. According to the technical scheme, two fixed stoppers (9) are symmetrically fixed on the inner wall of a cylinder body (7). Two vanes (25) are symmetrically fixed on an oscillating output shaft (10). The two vanes (25) and the two fixed stoppers (9) are in staggered arrangement. The valve body (6) and the oil distribution disc (17) are used for oil distribution for end faces. High-pressure oil enters two corresponding work cavities through a high-pressure oil way (16), a radial high-pressure oil way of the cylinder (7), a high-pressure annular oil groove (27) and a high-pressure radial oil passage (23) and a high-pressure radial oil passage (19). Low-pressure oil of the other two work cavities returns through a low-pressure oil distribution oil way (18), a low-pressure radial oil passage (19), a low-pressure annular oil groove (26), a radial low-pressure oil way of the cylinder body (7) and a low-pressure oil way (8). The double-vane hydraulic self-servo oscillating cylinder is small in radial size, good in dynamic property, simple in oil ways, convenient to machine and easy to produce, and stress of the valve body (6) and the oscillating output shaft (10) is balanced.

Description

technical field [0001] The invention belongs to the technical field of hydraulic servo swing cylinders, in particular to a double-blade hydraulic self-servo swing cylinder. Background technique [0002] The double-vane hydraulic self-servo swing cylinder can convert the small power input by the motor into the high power output by the hydraulic pressure, so as to control the equipment with high torque and precise rotation angle. [0003] At present, Professor Zhu Xinglong of Yangzhou University in China has studied a hydraulic servo joint (Zhu Xinglong et al. Research on Dynamics Modeling and Simulation of 3-DOF Hydraulic Servo Joint. Mechanical Design and Manufacturing Engineering, 2002,31(6):23-25. ) technology, because there is only a pair of oil ports on the rotary valve core of this hydraulic servo joint, the radial force on the valve core is unbalanced due to structural reasons, and at the same time, one end of the valve core is easy to form a dead space, and the dynami...

AI Technical Summary

Problems solved by technology

The servo valve also has the difficulty of preparing the hidden oil passage inside the servo valve sleeve, the valve core has poor dynamic characteristics, and the radial dimension is large.

[0005] Jiang Lin, a scholar of Wuhan University of Science and Technology, etc., also has a complex structure in the patented technology of "An Easy-to-Control Hydraulic Angle Self-servo Valve" (CN 201210033081.6). There are many complicated inner oil passages inside the sleeve, it is difficult to ensure the machining accuracy, the flow rate is small, the flow gain is non-linear, and the radial dimension is large

[0006] In addition, Jiang Lin, a scholar of Wuhan University of Science and Technology, also designed "a rotary valve type high torque hydraulic angle self-servo valve" (CN201210514025.4), the servo valve Although the radial force of the spool has been balanced and the resistance of the spool has been relatively reduced, there is also a complex structure. The spool and the valve sleeve are radially matched, and the position of the spool and the valve sleeve must be assembled radially. The radial dimension of the vane is reduced, resulting in a larger radial dimension of the servo valve

Images