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Wear life calculation method for aviation hydraulic sliding valve

A technology for hydraulic slide valves and wear life, which is applied in the testing of slide valves, valve devices, and mechanical components, and can solve problems such as increased frictional resistance between the valve core and valve sleeve, wear, and increased internal leakage

Active Publication Date: 2014-12-24
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

[0003] The fit gap between the spool valve core and the valve sleeve directly affects the performance of the slide valve. If the fit gap is too large, the spool will be skewed in the valve sleeve, which will cause the spool to stick, and the internal leakage will increase at the same time; if the fit gap is too small, the spool will Increased frictional resistance between valve sleeve and aggravated wear

Method used

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  • Wear life calculation method for aviation hydraulic sliding valve
  • Wear life calculation method for aviation hydraulic sliding valve
  • Wear life calculation method for aviation hydraulic sliding valve

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Embodiment Construction

[0062] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0063] A method for calculating the wear life of an aviation hydraulic spool valve according to the present invention, see figure 1 As shown, the specific steps of the method are as follows:

[0064] Step 1: Wear mechanism analysis. Adhesive wear usually occurs when the contacting objects have the same or similar hardness. Since the material of the spool and sleeve of the aviation hydraulic spool valve is the same, the wear mechanism is determined to be adhesive wear.

[0065] Step 2: Asperity load calculation. Since the spool and sleeve of the aviation hydraulic spool valve are clearance fit, the normal contact load is the asperity load W a . And the asperity load is the load W borne by the asperity in the state of elastic deformation e and the load W on the plastically deformed asperities p Sum. mainly include:

[0066] a. Profile he...

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Abstract

The invention provides a wear life calculation method for an aviation hydraulic sliding valve. The determining method includes the following steps that (1) wear mechanism analysis is carried out; (2) micro-bulge loads are calculated; (3) a wear coefficient is calculated; (4) wear life is calculated. The wear life calculation method can be directly used for products, the wear life of a valve element and a valve sleeve of the aviation hydraulic sliding valve is obtained after theoretical calculation, and adaptability of a project is high; meanwhile, when normal contact loads of the valve element and the valve sleeve of the aviation hydraulic sliding valve are calculated, the micro-bulge loads are calculated by means of elastic micro-bulge bearing and plastic micro-bulge bearing, and references can be provided for calculation of normal contact loads of similar contact-type friction pairs.

Description

technical field [0001] The invention provides a method for calculating the wear life of an aviation hydraulic slide valve, in particular to a calculation method for the asperity load and wear amount of a valve core and sleeve of a slide valve with clearance fit, and belongs to the technical field of wear life analysis. Background technique [0002] The spool valve uses the sliding of the spool relative to the valve sleeve to realize the opening and closing of the oil circuit or change the direction of the liquid flow, so as to realize the start, stop or change of the movement direction of the hydraulic actuator. It is widely used in hydraulic systems. The valve core and the valve sleeve are the structural main body of the slide valve, and the cylindrical valve core can slide axially in the valve sleeve. [0003] The fit gap between the spool valve core and the valve sleeve directly affects the performance of the slide valve. If the fit gap is too large, the spool will be ske...

Claims

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Application Information

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IPC IPC(8): G01M13/00F16K3/30
Inventor 陈云霞井海龙廖寻康锐
Owner BEIHANG UNIV
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