Friction performance testing device for slipper pair of high-pressure axial plunger pump

Abstract

The invention discloses a friction performance testing device for a slipper pair of a high-pressure axial plunger pump. The left and right sides of a box body are respectively provided with a high-pressure oil chamber and a sealed experiment chamber; the left and right ends of the box body are respectively provided with a left end cover and a right end cover of the box body; the high-pressure oil chamber is internally provided with a thrust piston; the end part of a piston rod of the thrust piston is arranged in the sealed experiment chamber and is connected with a slipper for testing through a connecting bolt; a swash plate stationary shaft is arranged on the right end cover of the box body; one end of the stationary swash plate shaft is arranged in the sealed experiment chamber, and a swash plate for testing is connected to the end through a bolt; and the other end of the swash plate stationary shaft is connected with a variable-frequency motor through a shaft coupling, and the variable-frequency motor is controlled by a frequency converter. By using the friction performance testing device, not only can the dry friction performance of the slipper pair of the high-pressure axial plunger pump be tested, but also different working states can be simulated to test. The friction performance testing device has the advantages of simple structure, convenience in use, accuracy in testing, low manufacturing and using costs and the like.

Description

technical field [0001] The invention relates to a high-pressure axial plunger pump sliding shoe pair friction performance testing device, which belongs to the technical field of friction performance testing of the axial plunger pump sliding shoe pair. Background technique [0002] At present, there are generally 7, 9 or 11 sliding shoe pairs installed in commonly used axial piston pumps, and each sliding shoe pair is composed of a sliding shoe and a swash plate. The detailed structure of each sliding shoe pair is as follows: figure 2 As shown, in the actual working process, the sliding shoe slides along the surface of the swash plate at high speed, and an inner oil chamber and an auxiliary supporting oil tank are designed on the bottom surface of the sliding shoe. When the axial piston pump is working, there is high-pressure oil in the pump Through the oil hole set on the shoe, it enters the inner oil chamber on the bottom surface of the shoe and the auxiliary support oil gr...

AI Technical Summary

Problems solved by technology

The performance of the whole pump is closely related to the performance of this layer of oil film. If the performance of the oil film is good, the service life of the pump will be long; Over time, it will burn out the slide shoes, which will cause the whole pump to break down

Therefore, in order to improve the performance of the pump, many scholars concentrate their efforts on the oil film between the sliding shoe and the swash plate. Therefore, in the prior art, there are many technical solutions for testing the friction performance of the sliding shoe pair. The performance of the oil film of the shoe pair is tested from the perspective of oil film lubrication, and the entire high-pressure axial piston pump is directly simulated to test the actual working conditions of the oil film lubrication performance during the test. This test method It can reveal the oil film lubrication performance of the shoe pair, but it cannot reveal the dry friction performance of the shoe pair; and there are still problems such as high test cost, complicated test device structure, troublesome test operation, and low test efficiency.

Therefore, the existing test methods for the friction performance of the sliding shoe pair of high-pressure axial piston pumps cannot fully reveal the working performance of the sliding shoe pair, and further supplementary tests are required

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