Hydraulic motor series-parallel control valve group, test system and test bench

Abstract

The application relates to the technical field of hydraulic motor testing, in particular to a hydraulic motor series-parallel control valve group, a testing system and a test bench. In the control valve group, in addition to two electromagnetic valves for controlling two hydraulic motors, a first speed regulating valve and a second speed regulating valve are added, so that the rotating speeds of the two hydraulic motors can be adjusted in real time when the hydraulic motors work alone or the two hydraulic motors work in parallel, and the rotating speeds are not affected by the loads of the hydraulic motors; an overflow throttle valve is added, so that the rotating speed of the second hydraulic motor can be adjusted when the two hydraulic motors work in series; a first one-way valve and a second one-way valve are added, so that the air suction problem of the hydraulic motor when the motor fails, the hydraulic pump fails or the rotating speed of the motor decreases from high speed to low speed is solved; the middle position of the electromagnetic valve directly connected with the hydraulic motor adopts a U type, so that the air suction problem of the hydraulic motor when the hydraulic motor works from high speed to stop is solved.

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