Loading device of hydraulic motor test board

Abstract

The invention relates to a loading device of a hydraulic motor test board, which is characterized in that a high-pressure oil pump which is connected with an oil tank is connected with an electro-hydraulic reversing valve, a bi-direction retaining throttling valve and a test motor oil inlet through a high-pressure filter and an oil inlet retaining valve, a test motor oil outlet forms a test loop with an oil return retaining valve and an oil return filter oil return box after being connected with a remote counterbalance overflow valve, a flow-rate sensor, through the bi-direction retaining throttling valve and an electro-hydraulic reversing valve oil outlet. A loader is formed by joining a loading motor and a testing motor respectively with a rotation speed torque instrument through a coupling joint, at the same time, a low-pressure pump which is connected with the oil tank enters two ends of the loading motor through two retaining valves, the testing motor rotates to drive the loading motor to rotate, the oil outlet retaining valve is automatically closed, and the outlet oil forms a loading circuit through the counterbalance overflow valve, the remote overflow valve, the oil return retaining valve and the oil return filter oil return box. The loading motor is used for substituting an original magnetic powder loader, so the size is greatly reduced, the energy consumption is reduced, the remote control adjustment is convenient for test personnel to work, the loading force is large, torque of 60000 N.m can be tested, the testing range is wide, and the practicability is strong.

Description

technical field [0001] The invention relates to an important part of a hydraulic motor test bench, in particular to a loading device of the hydraulic motor test bench used for testing the output load of the motor. Background technique [0002] Before the hydraulic motor leaves the factory, in order to ensure the product quality, each hydraulic motor must be tested for performance, such as pressure, flow, torque, speed, performance, etc., and the qualified product can only be shipped if it meets the design requirements. [0003] The current manufacturer uses a magnetic powder brake as the output load of the test motor in the test, and the magnetic powder brake is based on the electromagnetic principle and uses magnetic powder to transmit torque. The magnetic powder brake is connected to the hydraulic motor of the test piece. It has many components, large volume and energy consumption High cost, high cost, difficult maintenance, and it has a linear relationship between the exc...

AI Technical Summary

Problems solved by technology

[0003] The current manufacturer uses a magnetic powder brake as the output load of the test motor in the test, and the magnetic powder brake is based on the electromagnetic principle and uses magnetic powder to transmit torque. The magnetic powder brake is connected to the hydraulic motor of the test piece. It has many components, large volume and energy consumption High cost, high cost, difficult maintenance, and it has a linear relationship between the excitation current and the transmission torque. It needs a steady current power supply produced by a professional manufacturer as its special power supply. It is prone to jamming during the work process. High-power The magnetic powder brake also needs water cooling, so using the magnetic powder brake as the output load of the test motor has high cost, high maintenance cost, and poor practicability

Images