A High Power Density Electromagnetic Direct Drive Linkage Distribution Pump

Abstract

The invention relates to the technical field of hydraulic pumps, and provides a high-power-density electromagnetic direct-drive linkage flow distribution pump, which includes two linkage flow distribution pump modules with the same structure, and the linkage pump modules include a moving-coil electromagnetic linear actuator, two The valve-pump units with the same structure are symmetrically installed at both ends of the moving coil electromagnetic linear actuator; the two linkage distribution pump modules are connected to the oil circuit through four valve-pump units, and the four valve-pump units are in the form of 2× 2 are distributed in a matrix; the oil circuit connecting the four valve-pump units includes a full linkage connection and a half linkage connection. A high-power-density electromagnetic direct-drive linkage flow distribution pump of the present invention uses two pump modules with the same structure to jointly drive four valve-pump units to simultaneously distribute flow, which can realize continuous oil suction and discharge, and reduce the pulsation of output flow; at the same time, The size, direction and frequency of the output flow can be adjusted conveniently, which improves the working efficiency and flexibility of the direct drive pump.

Description

technical field [0001] The invention relates to the technical field of hydraulic pumps, in particular to an electromagnetic direct-drive linkage flow distribution pump with high power density. Background technique [0002] The electromagnetic direct drive pump cancels the "rotary-linear" motion conversion mechanism in the middle of the traditional swash plate plunger pump, shortens the power transmission route, has the advantages of small size, simple structure and high power density, and is convenient for highly integrated integrated design. It is widely used in the fields of aerospace hydrostatic actuators, engineering hydraulic presses and walking hydraulics. [0003] At present, most of the common electromagnetic direct drive pumps work with active valves to ensure the continuity of pump suction and discharge. Although the pump oil flow can be changed by adjusting the reciprocating motion amplitude and actuation frequency of the oil suction and discharge plungers, the ad...

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Problems solved by technology

[0003] At present, most of the common electromagnetic direct drive pumps work with active valves to ensure the continuity of pump suction and discharge. Although the pump oil flow can be changed by adjusting the reciprocating motion amplitude and actuation frequency of the oil suction and discharge plungers, the additional active valves increase the The structure is complex, and there are still problems such as serious pump flow pulsation and limited ability to adjust system flow and pressure.

[0004] The patent No. CN 103133322 B is a multi-piezoelectric driven circulating active distribution pump, which proposes an active distribution pump driven by multiple piezoelectric ceramic drivers. Although it can effectively reduce flow pulsation and achieve continuous oil suction and discharge, However, limited by the micro-stroke of the piezoelectric ceramic driver, the rated load of the pump is small, and when it is running at high load, the piezoelectric ceramic driver requires ultra-high frequency operating conditions, which will cause high temperature irreversible losses and reduce work efficiency

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