Electromagnetic direct-drive electro-hydraulic servo pump

Abstract

The invention discloses an electromagnetic direct-drive electro-hydraulic servo pump, which comprises an electromagnetic direct-drive pump valve module A and an electromagnetic direct-drive pump valve module B. The electromagnetic direct-drive pump valve module A and the electromagnetic direct-drive pump valve module B are identical, the electromagnetic direct-drive pump valve module B comprises an end cover (1), a valve spool (3), a pump body (4), a piston (5), an end cover (7), a pump shaft (8), a ball hinge sleeve (9), a linear motor rotor extending rod (10), a linear motor (11), a sealing ring (13), a sealing ring (14), a piston cavity (15), a sealing ring (31), a sealing ring (32) and a valve cavity (33). The piston is directly driven to suck and drain oil by the linear motor, transmission is simple and high-efficient, additional lateral force is avoided, internal friction loss is reduced, and the service life of the electromagnetic direct-drive electro-hydraulic servo pump is longer that that of an axial plunger pump on the same technologic level.

Description

technical field [0001] The invention relates to an electromagnetic direct drive electro-hydraulic servo pump, which belongs to the technical field of hydraulic pumps. Background technique [0002] Axial piston pumps are important power components in hydraulic systems, widely used in aerospace hydraulics, industrial hydraulics and travel hydraulics, and are one of the most widely used hydraulic components in modern hydraulic components. [0003] At present, the most commonly used axial piston pump is generally in the form of rotary drive. Its structure includes pump shaft, sliding shoe, plunger, cylinder block, plunger cavity, distribution plate and swash plate, etc. The mover of the rotating motor is connected to the pump shaft. Drive the pump shaft to rotate, and drive the cylinder to rotate together. Through the action of the swash plate, the rotary motion is converted into the reciprocating linear motion of the plunger. The oil is sucked and discharged through the change ...

AI Technical Summary

Problems solved by technology

However, it is the driving mode of the rotary motor driving the axial piston pump, and the performance of the variable mechanism itself such as the adjustable inclination swash plate in the axial piston pump, which has become a bottleneck restricting the development of the pump control system.

A series of components on the rotating shaft system in the axial piston pump, including the cylinder block, plunger and slipper, etc., the combined moment of inertia, plus the moment of inertia of the rotating motor rotor itself and various frictions in the pump The resistance is a big burden for the forward and reverse speed control of the rotating motor; the more complicated flow channel design and larger mass of the swash plate variable mechanism make the adjustment of the variable process neither accurate nor fast, etc. These factors are It determines that the dynamic response capability of the pump control system has a big gap compared with the valve control system.

Images