A three-way speed regulating valve based on hydraulic motor-generator pressure compensator

Abstract

The invention provides a three-way speed regulating valve based on a hydraulic motor-generator pressure compensator, the oil inlet of the hydraulic motor (8) is connected with the oil inlet of the throttle valve (4); the oil outlet of the hydraulic motor (8) Connect with the oil outlet of the throttle valve (4); connect the first pressure sensor (6) with the oil outlet of the throttle valve (4); connect the second pressure sensor (7) with the oil inlet of the throttle valve (4) connection; the torque input end of the motor controller (10) is connected to the generator (9); the inlet and outlet pressure difference Δp of the throttle valve (4) is obtained through the first pressure sensor (6) and the second pressure sensor (7) , which is also the inlet and outlet pressure difference of the hydraulic motor (8), compare the inlet and outlet pressure difference Δp with the target control pressure difference; when Δp is less than the target control pressure difference, the motor controller (10) adjusts the torque T of the generator (9) Increase, according to the increase of the inlet and outlet pressure difference Δp of the hydraulic motor (8), the inlet pressure Pp also increases accordingly, thereby increasing the pressure difference at both ends of the throttle valve.

Description

technical field [0001] The invention relates to an electro-hydraulic control technology and a speed regulating valve, in particular to a three-way speed regulating valve based on a hydraulic motor-generator pressure compensator. Background technique [0002] In terms of hydraulic components and system energy-saving technologies, hydraulic energy loss mainly includes throttling loss and overflow loss. Among them, throttling loss is mainly divided into throttling loss at inlet, throttling at outlet, bypass throttling loss and linkage throttling loss. Different types of hydraulic systems have different types of throttling losses. For example, in the throttling and speed regulating circuit of a single pump and multiple actuators, a large amount of energy is always consumed on the throttle port of the circuit with a lower pressure. The use of volumetric speed regulation circuit can avoid additional throttling loss and overflow loss, but the volumetric speed regulation system is...

AI Technical Summary

Problems solved by technology

For the throttling and speed regulating system using the three-way speed regulating valve, the fixed difference relief valve has the function of relief and pressure regulation. When the load changes, part of the hydraulic oil will always flow back to the oil tank through the relief valve. Throttle valve always has overflow loss

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