A hydraulic slide valve pair friction test system and test method

Abstract

The invention provides a hydraulic spool valve pair friction testing system and a testing method. The hydraulic spool valve pair friction testing system comprises a friction testing part, a testing measurement part and a monitoring camera, wherein a hydraulic spool valve, a cycle counter and an alternating current and direct current converter are connected in series to form the friction testing part, the on / off state of a current signal, which is provided by the alternating current and direct current converter for the hydraulic spool valve, is controlled by the cycle counter, and cycle reversing of the hydraulic spool valve and friction testing of a spool valve pair are achieved. The hydraulic spool valve is a hydraulic spool valve pair friction testing device, the oil port of the hydraulic spool valve is completely blocked, part of oil liquid is stored in the spool valve, and reciprocating rectilinear movement of the hydraulic spool valve element is achieved through electromagnet driving and spring return; the output movement of the cycle counter circularly controls the on / off state of the current in the order of opening, closing and opening; the alternating current and direct current converter is used for converting alternating current into direct current; the testing measurement part is composed of a profilometer, a balance and a ferrograph which are used for measuring the surface morphology of the spool valve pair, weighing the valve element and detecting an oil product respectively; the monitoring camera is used for monitoring the state of the friction testing system.

Description

technical field [0001] The invention relates to the technical field of hydraulic slide valve tests, in particular to a hydraulic slide valve pair friction test. Background technique [0002] Surface topography refers to the geometry and properties of the surface of the friction pair. Simply put, it refers to the microscopic geometry, waviness, texture and shape error of the surface of the part. Surface topography analyzes the micro-geometric shape of the surface of the part to find the cause of surface failure and provide the most direct experimental basis to study various failure mechanisms. Hydraulic components are precision heavy-duty machines, and the microscopic surface topography of key friction pairs is crucial to the performance of components. [0003] The application of hydraulic slide valve in hydraulic system is very common, and it is the most widely used structural form among various hydraulic valves. In the hydraulic spool valve, there is generally a cylindric...

AI Technical Summary

Problems solved by technology

[0007] 1. The evaluation of the friction and wear performance of the hydraulic valve spool and valve body is limited to the hydraulic comprehensive effects of the slide valve pair, such as wear and leakage, and does not go deep into the surface microscopic topography of the slide valve pair;

[0008] 2. The sliding run-in wear test of the surface morphology adopts the traditional universal friction and wear testing machine to carry out the friction of the pin-disc friction pair, and does not specifically conduct a model-based friction test close to the actual hydraulic slide valve;

[0009] 3. Active spool valve friction test (hydraulic spool valve is tested in a hydraulic system with high-pressure oil source) has high energy consumption and high cost;

[0010] 4. Lack of specialized measurement and analysis for slide valve pair friction test

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