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One hundred million-rotation long-service-life multi-point end face contact gold alloy fiber electric brush and preparation method thereof

An alloy fiber, long-life technology, applied in brush manufacturing, rotating current collectors, connections, etc., can solve problems such as poor contact stability and wear service life, and achieve improved contact stability, high adaptability, and stable contact Effect

Active Publication Date: 2022-01-18
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to prepare a brush material with multi-point end surface elastic contact through the optimized design of structure and material, so as to solve the problem of poor contact stability, serious wear and service life of traditional block brush materials. Short and other questions

Method used

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  • One hundred million-rotation long-service-life multi-point end face contact gold alloy fiber electric brush and preparation method thereof
  • One hundred million-rotation long-service-life multi-point end face contact gold alloy fiber electric brush and preparation method thereof
  • One hundred million-rotation long-service-life multi-point end face contact gold alloy fiber electric brush and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] Embodiment 1: Silver mesh coated gold alloy fiber electric brush

[0071] The brush material is mainly composed of three parts: cladding material, fiber brush body and low-temperature solder, and its external dimensions are The cladding material is a silver alloy fiber braided mesh sleeve with a thickness of 0.15mm and the material is 78Ag20Cu2Ni (7.2wt.%); the fiber brush body material is gold alloy fiber with a diameter of 30 μm and the material is 91Au9Ni (51.4wt.%); It is SAC305 (Sn96.5 / Ag3 / Cu0.5 (10.9wt.%)) and 6404 (Sn64 / Bi35 / Ag1 (30.5wt.%)) lead-free solder. The friction partner is 78Ag20Cu2Ni alloy. The brush contact angle is 80°.

[0072] The brush preparation method comprises the following steps:

[0073] Step 1 Fiber Forming

[0074] According to the fiber shape design requirements, the gold alloy fiber is bent and formed by using a limit mold.

[0075] Step 2 Fiber bundling

[0076] The fibers obtained in Step 1 were chopped into bundles according to ...

Embodiment 2

[0094] The brush material is mainly composed of four parts: coating material, fiber brush body, low-temperature solder and fixed end cap, and its external dimensions are The cladding material is a silver alloy fiber braided mesh sleeve with a thickness of 0.15mm and the material is 78Ag20Cu2Ni (7.8wt.%); the fiber brush body material is gold alloy fiber with a diameter of 30 μm and the material is 91Au9Ni (51.8wt.%); It is SAC305 (Sn96.5 / Ag3 / Cu0.5 (10.6wt.%)) and 6404 (Sn64 / Bi35 / Ag1 (29.8wt.%)) lead-free solder. The friction partner is 78Ag20Cu2Ni alloy. The brush contact angle is 80°.

[0095] The brush preparation method comprises the following steps:

[0096] Step 1 Fiber Forming

[0097] According to the fiber shape design requirements, the gold alloy fiber is bent and formed by using a limit mold.

[0098] Step 2 Fiber bundling

[0099] The fibers obtained in Step 1 were chopped into bundles according to the designed length, and the fibers with a filling rate of 20 ...

Embodiment 3

[0117] The brush material is mainly composed of four parts: coating material, fiber brush body, low-temperature solder and fixed end cap, and its external dimensions are The cladding material is a silver alloy fiber braided mesh sleeve with a thickness of 0.15mm and the material is 78Ag20Cu2Ni (8.5wt.%); the fiber brush body material is gold alloy fiber with a diameter of 30 μm and the material is 91Au9Ni (53.4wt.%); It is SAC305 (Sn96.5 / Ag3 / Cu0.5 (13.7wt.%)) and 6404 (Sn64 / Bi35 / Ag1 (24.4wt.%)) lead-free solder. The friction partner is 70Au20Ag10Cu alloy. The brush contact angle is 90°.

[0118] The brush preparation method comprises the following steps:

[0119] Step 1 Fiber Forming

[0120] According to the fiber shape design requirements, the gold alloy fiber is bent and formed by using a limit mold.

[0121] Step 2 Fiber bundling

[0122] The fibers obtained in Step 1 were chopped into bundles according to the designed length, and the fibers with a filling rate of 20...

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Abstract

The invention relates to a one hundred million-rotation long-service-life, high-rotating-speed and large-current-carrying gold alloy fiber brush material for conductive slip ring products in the space field and a preparation method thereof. The material can keep a stable electric contact state for a long time under the conditions of high vacuum, high rotating speed of more than or equal to 300rpm and large current carrying of more than or equal to 500A / cm < 2 >, the average static contact resistance is less than 10m omega, the average dynamic contact resistance is less than 20m omega, the average friction coefficient is stabilized at 0.5-0.8, the average wear rate is less than 8 * 10 <-11 > m / m, the average contact voltage drop is less than 80mV, and the average electric noise is less than 1m omega. The cumulative service life or the total mileage is greater than 10 million rotation or 10000 km. The preparation process is simple, the cost is low and controllable, and large-scale industrial application is facilitated.

Description

technical field [0001] The invention relates to a 100 million revolution long-life multi-point end face contact gold alloy fiber brush and a preparation method thereof, belonging to the technical field of space equipment development. Background technique [0002] The brush is a main contact part that constitutes a conductive slip ring. The purpose of transmitting data signals or power from a fixed position to a rotating position is achieved through continuous frictional contact between the brush and the rotor. Various types of space vehicles and extraterrestrial detectors need to use space precision conductive slip rings to realize energy transmission and signal transmission, such as solar panels, radars, scanners and other payloads. Therefore, as a key component of the space precision conductive slip ring, the brush is the key to the performance of the conductive slip ring. The length of its life and the stability of the state directly determine the length of the spacecraft...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R39/20H01R39/24H01R43/12
CPCH01R39/20H01R39/24H01R43/12Y02E10/50
Inventor 张雷罗博
Owner CENT SOUTH UNIV