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Method for calculating sliding shoe-chuck wear life of plunger pump

A calculation method and wear life technology, applied in calculation, special data processing applications, instruments, etc., can solve the problems of lack of sliding shoes and chucks, increased oil return, less research on the wear of sliding shoes and chucks, etc.

Active Publication Date: 2014-11-19
BEIHANG UNIV
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AI Technical Summary

Problems solved by technology

At present, the research on the wear failure of aviation hydraulic pumps mainly focuses on the three typical friction pairs of the valve plate and the rotor, the plunger and the cylinder, and the sliding shoe and the swash plate. The wear analysis and design of boots and swash plates, but less research on the wear of sliding shoes and chucks
[0003] Most of the current aviation hydraulic pump products have made corresponding engineering improvements to the wear problem of the sliding shoe and the swash plate, such as adding wear-resistant plates for the swash plate and silver plating on the lower surface of the sliding shoe, etc. These measures have greatly improved the sliding However, there has been a lack of corresponding theories and methods for the wear of sliding shoes and chucks, making the corresponding engineering problems increasingly prominent. This is also the case in the durability test of an engine-driven pump product of a certain type of aircraft. Exposed a lot of wear and tear on the shoes and chucks, resulting in increased oil return

Method used

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  • Method for calculating sliding shoe-chuck wear life of plunger pump
  • Method for calculating sliding shoe-chuck wear life of plunger pump
  • Method for calculating sliding shoe-chuck wear life of plunger pump

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Embodiment Construction

[0053] The present invention will be further described in detail below with reference to the drawings and embodiments.

[0054] The invention is a method for calculating the wear life of the plunger pump slipper-chuck, see figure 2 As shown, the specific steps of the method are as follows:

[0055] Step 1: Calculation of the asperity load. Since the annular surface of the sliding shoe and the chuck are in a clearance fit, there is an oil film between the chuck and the annular surface of the sliding shoe during the working process of the hydraulic pump, and there is no direct contact, so the normal pressure of the chuck to the sliding shoe W a Is the asperity load. If A represents the nominal contact area between the upper surface of the shoe and the chuck, and H represents the hardness of the upper surface of the shoe, the calculation formula for the asperity load is shown in formula (1):

[0056] W a = 1 30 AHψ [ F 3 2 ( λ ) - F 3 2 ...

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Abstract

The invention provides a method for calculating the sliding shoe-chuck wear life of a plunger pump. The method for calculating the sliding shoe-chuck wear life of the plunger pump includes the following steps of firstly, micro-bulge load calculation, secondly, allowable wear volume calculation, thirdly, allowable wear stroke calculation, fourthly, sliding shoe spin velocity calculation and fifthly, sliding shoe-chuck wear life calculation. The method can be directly applied to products, the sliding shoe spin velocity is determined by establishing the relationship between liquid frictional work and kinetic energy generated by rotating a sliding shoe relative to a chuck, the sliding shoe-chuck wear life of the plunger pump is determined in combination with an Archard adhesive wear model and through theoretical calculation, and the method has the advantage of being high in engineering adaptability.

Description

Technical field [0001] The invention provides a method for calculating the wear life of a plunger pump slipper-chuck, in particular to a method for calculating the wear life of a plunger pump due to the rotation of the slipper and the chuck under the action of liquid friction, and belongs to the wear life analysis technology field. Background technique [0002] Aviation hydraulic pumps are the power components of aircraft hydraulic systems, and their performance directly affects the working conditions of the hydraulic system, and more than 80% of the failures of aviation hydraulic pumps are caused by wear. At present, the research on the wear failure of aviation hydraulic pumps mainly focuses on the three pairs of typical friction pairs of valve plate and rotor, plunger and cylinder, and slipper and swash plate. The slipper pair has the most research, but they are all concentrated and slippery. Wear analysis and design of shoes and swashplates, but less research on the wear of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 陈云霞井海龙廖寻康锐
Owner BEIHANG UNIV
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