Dual plunger valve distribution load-sensing linear motor pump

Abstract

The invention discloses a double-plunger valve flow distribution load-sensitive linear motor pump. The double-plunger valve flow distribution load-sensitive linear motor pump comprises a pump body, end covers, a first linear motor module, a second linear motor module, a first plunger assembly, a second plunger assembly, a first flow distribution valve assembly, a second flow distribution valve assembly, inlet pressure sensors, outlet pressure sensors and electric connectors; the two ends of the pump body are each provided with one end cover; the first linear motor module and the second linearmotor module are located in the pump body side by side; the first plunger assembly is located in an inner cavity of the first linear motor module, and the second plunger assembly is located in an inner cavity of the second linear motor module; the first flow distribution valve assembly and the second flow distribution valve assembly are installed on the inner sides of the end covers arranged at the two ends of the pump body correspondingly; each end cover is provided with a main oil path inlet and a main oil path outlet; the inlet pressure sensors are used for detecting the pressure of the main oil path inlets, and the outlet pressure sensors are used for detecting the pressure of the main oil path outlets; and the electric connectors are installed on the end covers.

Description

Technical field [0001] The present invention relates to the technical field of pump control servo systems, in particular to a dual-plunger valve flow distribution load-sensitive linear motor pump. Background technique [0002] The aerospace pump-controlled servo control system is a hydraulic servo system for direct closed control of the pump. It is also a new type of positive displacement electro-hydraulic servo system developed in recent years. [0003] The aerospace pump control servo control system adopts the working principle of changing the output flow or pressure of the pump to match the load. In this hydraulic control system, the pressure and flow of the system are completely realized by the adjustment of the pump. The operation and control are simple and reliable, and it has the dual advantages of the flexibility of servo motor control and the large hydraulic output force. As the direct pump control system has significant advantages of energy saving, high efficiency, and h...

AI Technical Summary

Problems solved by technology

However, in the existing technology, there are the following problems: the existing electrohydrostatic actuator generally generates a large amount of heat, and there is a large proportion of ineffective power consumption. In addition, it is difficult to reflect the load change of the pump inlet and outlet and realize the load real-time Control problems; there are complex flow passages inside the pump, which makes the flow field state complicated and the pressure loss is large; there is a problem that the response speed of the distribution valve is higher than that of the plunger reciprocating motion, and the slide valve structure is difficult to adapt to high pressure. Frequency response requirements, resulting in large pressure pulsation and even flow distribution failure; there is a linear motor that drives multiple plunger movements, which requires high process requirements, resulting in difficult processing and assembly, increased cost, increased wear, and reduced pump efficiency. question etc.

These problems limit the application of valve-distribution linear motor pumps, making it difficult to meet the application requirements of high-performance, low-cost hydraulic pumps

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