Method for evaluating friction and wear performance of valve and predicting service life under simulating working conditions

A technology of friction and wear and working conditions, which is applied in the direction of mechanical valve testing, testing wear resistance, testing material strength by applying repetitive force/pulsation force, etc., can solve problems such as not considering the working conditions of valves, and achieve accurate evaluation Effect

Inactive Publication Date: 2019-11-05
WUZHONG INSTR
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Problems solved by technology

However, this test method does not take into account the operating conditions of the valve. The test is carried out under idealized friction and wear conditions. The test results will be quite different from the actual results of the valve. At the same time, the evaluation index is only the number of reciprocations, which can only be used as life expectancy index

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  • Method for evaluating friction and wear performance of valve and predicting service life under simulating working conditions

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Embodiment Construction

[0022] The present invention is described in further detail now in conjunction with accompanying drawing. These drawings are all simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, so they only show the configurations related to the present invention.

[0023] Such as figure 1 As shown, a method for evaluating the friction and wear performance of valves and predicting service life under simulated working conditions includes the following steps:

[0024] 1) Apply valve sealing pre-tightening force, using electric cylinder as the drive, so that the pre-tightening force reaches the test set value, and at the same time ensure that the external pre-tightening force is constant during the test, and the pre-tightening force during the test is monitored by the pressure sensor Changes;

[0025] 2) Prepare a working medium close to the actual working conditions, and prepare 0.65m in the storage tank 3 The working me...

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Abstract

The invention relates to a method for evaluating the friction and wear performance of a valve and predicting the service life under simulating working conditions. By simulating the actual working condition environment in combination with the mature sensing technology, the variation conditions of the operation torque are monitored through a torque sensor, and then the wear conditions of the valve are reflected; the pressure intensity variation of a closed containing cavity is monitored through a pressure sensor, and the static sealing performance of the valve is reflected; by recording the revolutions of a driver through a counter, through the relationship between the revolutions of the driver and the switching on and off frequency of the valve, the switching on and off frequency of the valve is calculated, and then the service life of the valve is predicted. By placing the practical use valve in an artificially-set working condition environment, the effect of simulating actual workingconditions is realized, the friction and wear performance of the valve is evaluated through torque and pressure intensity indexes, the service life of the valve is predicted according to the switchingon and off frequency index, the evaluating result and the predicting result are closer to the actual working condition results, and the accurate guiding effect on actual production is realized.

Description

technical field [0001] The invention relates to the technical field of valves, in particular to a method for evaluating valve friction and wear performance and predicting service life under simulated working conditions. Background technique [0002] In modern industry, especially in the field of coal chemical industry, valves are used in high-temperature, high-pressure and highly corrosive working conditions, and their working form is frequent reciprocating opening and closing. Working under such working conditions for a long time will seriously shorten the valve life. service life. At present, aiming at the failure forms of valves at home and abroad, combined with working forms and working conditions, the performance of valves is improved through surface treatment technology, advanced manufacturing technology and equipment, and structural optimization, and the service life of valves in high-strength and harsh working conditions is extended. . In order to be able to accura...

Claims

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Application Information

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IPC IPC(8): G01M13/003G01N3/36G01N3/56
CPCG01M13/003G01N3/36G01N3/56G01N2203/0005G01N2203/0044
Inventor 马玉山武刚吴向清陈连阳张耀华马小春
Owner WUZHONG INSTR
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