Friction and wear test method for inner surface of stator of straight vane variable displacement pump

Abstract

The invention discloses a straight blade variable pump stator inner surface frictional wear detecting device and a testing method, aiming at the problem that a tester for simulating frictional wear ofa single-acting variable blade pump under a normal working condition does not exist at present. The straight blade variable pump stator inner surface frictional wear detecting device comprises a straight blade, a blade guide groove and a stator inner curve contour simulation cam. When a contour lowest point of the stator inner curve contour simulation cam is in contact with the straight blade, asecond servo motor drives the straight blade, and the second servo motor stops when a pressure value fed back by means of a pressure sensor is equal to a set value; the stator inner curve contour simulation cam rotates and stops after reaching rotation time; hydraulic oil passes through a detection channel and is discharged after sequentially passing through an extinction type particle size analyzer and an extinction type particle counter, the extinction type particle size analyzer detects particle size of fall-off metal particles, and the extinction type particle counter detects a number of the fall-off metal particles; and the total worn mass of the stator inner curve contour simulation cam and the straight blade is calculated. The straight blade variable pump stator inner surface frictional wear detecting device can simulate the operating environment of the straight blade variable pump reliably, and measure the wear extent.

Description

technical field [0001] The invention belongs to the technical field of friction pair detection, in particular to a method for testing the friction and wear performance of a friction pair on the inner surface of a vane pump stator. Background technique [0002] The stator of the single-acting variable vane pump can be moved, and the variable is realized by changing the eccentricity of the stator and rotor. This kind of pump is highly efficient and energy-saving, and can be widely used as a medium and high pressure vane pump in metallurgy, machine tools, plastic machines and other industries. In the application, we found that the single-acting variable vane pump mainly has the following shortcomings: the inner cavity of the stator is worn, scratched, and the vanes and side plates are worn, resulting in leakage and reducing the efficiency and service life of the vane pump. Detecting the friction between the inner cavity of the stator and the blades of the single-acting variable...

AI Technical Summary

Problems solved by technology

In the application, we found that the single-acting variable vane pump mainly has the following shortcomings: the inner cavity of the stator is worn, scratched, and the blades and side plates are worn, resulting in leakage and reducing the efficiency and service life of the vane pump.

However, there is currently no tester that can simulate the friction and wear of a single-acting variable vane pump under normal working conditions, so it is necessary to invent a device for testing the inner cavity wear of the single-acting variable vane pump under the condition of hydraulic oil immersion

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