A four-module linkage flow distribution type electromagnetic direct drive pump

Abstract

The invention relates to the technical field of hydraulic pumps, and provides a four-module linkage flow distribution type electromagnetic direct drive pump, which includes four linkage pump modules with the same structure and oil passages connecting the four linkage pump modules; A coil type electromagnetic linear actuator, a valve unit and a pump unit; the oil circuit connecting the four linkage pump modules includes a full linkage connection and a half linkage connection. A four-module linkage flow distribution type electromagnetic direct drive pump of the present invention simultaneously drives the flow distribution work under the control of four sinusoidal displacement signals with the same amplitude and 90-degree phase difference, which can realize continuous oil suction and discharge, and reduce the pulsation of output flow ; At the same time, it is convenient to adjust the size, direction and frequency of the output flow, 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 a four-module linkage flow distribution electromagnetic direct drive pump. 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 additional acti...

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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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