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Multi-field coupled spatial conductive slip ring wear modeling and life prediction method

A conductive slip ring, life prediction technology, applied in the direction of electrical digital data processing, special data processing applications, instruments, etc., can solve problems such as increased wear, slip ring failure, slip ring conductivity, etc., to avoid high costs, good The effect of referential meaning

Active Publication Date: 2019-09-27
SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under the condition of contact load and current flow, the friction pair is in the coupling environment of heat, force and electricity, and the mutual influence aggravates the wear. When the amount of wear debris generated by wear reaches a certain amount, the electrical conductivity of the slip ring will be seriously affected. Finally lead to slip ring failure

Method used

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  • Multi-field coupled spatial conductive slip ring wear modeling and life prediction method
  • Multi-field coupled spatial conductive slip ring wear modeling and life prediction method
  • Multi-field coupled spatial conductive slip ring wear modeling and life prediction method

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Embodiment Construction

[0055] The present invention will be further described below in conjunction with the accompanying drawings.

[0056] Such as figure 1 As shown, the space conductive slip ring friction and wear analysis and life prediction method provided by the present invention comprises the following steps:

[0057] Step 1. Use Hertz theory to calculate the contact area of ​​the slip ring friction pair;

[0058] The contact of the friction pair of the conductive slip ring belongs to point-to-point contact, and the contact of the conductive slip ring is approximately ellipsoidal, and the contact between the contact and the bus plate produces elastic deformation. Secondary wear severity, the present invention calculates the elastic deformation contact area between the two through the Hertz theory, and the friction pair contact model can be known by the Hertz theory as figure 2 As shown, when the contact is in contact with the bus plate, the contact surface is approximately regarded as a cir...

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Abstract

The invention provides a modeling analysis and service life prediction method for friction wear of a spatial conductive slip ring, and aims to overcome the problems that the existing current-carrying friction wear is difficult to quantitatively evaluate and the service life is difficult to predict. The frictional wear analysis method comprises the following steps: calculating the abrasive dust amount, the contact area and the temperature change in the running process of a friction pair according to an adhesive wear theoretical calculation method, a Hertz theory and a heat transfer theory, and solving the coupling relationship of the mutual influence among thermoelectricity; carrying out quantitative analysis on the operation failure process of the conductive slip ring, and establishing a corresponding model of the abrasive dust amount and the number of running circles under different environment and condition parameters, so that the running life of the conductive slip ring is predicted, and technical and data support is provided for service life evaluation of the slip ring in the actual machining process.

Description

technical field [0001] The invention relates to a life prediction method of a slip ring, in particular to a life prediction method of a space slip ring based on wear modeling. Background technique [0002] As the core component of the satellite solar array drive mechanism (SADA) product, the conductive slip ring is mainly used to transmit electric power and signals between the relatively rotating solar panels and the star. It is one of the few single-point failure links in the entire star. Whether its work is reliable or not is directly related to the energy supply of the entire star and the success or failure of the mission, and it is a veritable "lifeline" of the aircraft. In response to the new requirements of the new generation of long-life satellites for high reliability and long life of key components, there is a huge demand for conductive slip rings in design methods, new material development, tribological properties, long-life maintenance, and high-precision manufact...

Claims

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20Y02T90/00
Inventor 余建波徐燕铭施英莹罗京王永松刘双宝贺晓斌刘贤军孙远航
Owner SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
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