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A ground brush and a preparation method thereof

A grounding brush, graphite powder technology, applied in the direction of brush manufacturing, circuit, connection, etc., can solve the problems of lead-containing is not environmentally friendly, short service life, poor stability, etc., to achieve long service life, good wear resistance, make up a reasonable effect

Active Publication Date: 2018-12-14
美尔森哈碳电碳(哈尔滨)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of poor wear resistance, poor stability, short service life, and lead-containing non-environmental protection of existing brushes, the present invention provides a grounding brush and its preparation method, especially a grounding brush for motors and Its preparation method, the grounding brush of the present invention has low resistivity, good wear resistance, does not contain lead, has long service life, has high wear resistance, and adopts the technical scheme as follows:

Method used

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  • A ground brush and a preparation method thereof

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Effect test

Embodiment 1

[0033] This embodiment provides a grounding brush and a preparation method thereof, the formula and preparation method are as follows:

[0034] 1. Formula:

[0035] The grounding brush is prepared from the following raw materials in parts by weight: 10 parts of graphite powder, 70 parts of copper powder, 2 parts of tin powder, 5 parts of zinc carbonate, 0.1 part of silicon carbide and 0.1 part of washing oil; wherein: graphite powder has a particle size of 300 mesh natural graphite powder (flaky graphite powder), and the carbon content in the graphite powder is ≥99%, the ash content is ≤1%; the average particle size of silicon carbide is 300 mesh; the bulk density of copper powder is 0.9g / cm 3 ;

[0036] 2. The preparation method of the grounding brush is carried out according to the following steps:

[0037] 1) Weighing: Weigh graphite powder, copper powder, tin powder, zinc carbonate, anti-wear agent and washing oil respectively;

[0038] 2) Mixing: put graphite powder, a...

Embodiment 2

[0042] This embodiment provides a grounding brush and a preparation method thereof, the formula and preparation method are as follows:

[0043] 1. Formula:

[0044] The grounding brush is prepared from the following raw materials in parts by weight: 20 parts of graphite powder, 75 parts of copper powder, 8 parts of tin powder, 11 parts of zinc carbonate, 0.5 part of anti-wear agent and 0.2 part of washing oil; wherein: graphite powder is the particle size It is 300 mesh natural graphite powder (flaky graphite powder), and the carbon content in the graphite powder is ≥99%, the ash content is ≤1%; the average particle size of silicon carbide is 300 mesh; the bulk density of copper powder is 0.9g / cm 3 ;

[0045] 2. The preparation method of the grounding brush is carried out according to the following steps:

[0046] 1) Weighing: Weigh graphite powder, copper powder, tin powder, zinc carbonate, anti-wear agent and washing oil respectively;

[0047] 2) Mixing: put graphite powder...

Embodiment 3

[0051] This embodiment provides a grounding brush and a preparation method thereof, the formula and preparation method are as follows:

[0052] 1. Formula:

[0053] The grounding brush is prepared from the following raw materials in parts by weight: 14 parts of graphite powder, 75 parts of copper powder, 5 parts of tin powder, 8 parts of zinc carbonate, 0.3 part of anti-wear agent and 0.1 part of washing oil; wherein: graphite powder is the particle size It is 300 mesh natural graphite powder (flaky graphite powder), and the carbon content in the graphite powder is ≥99%, the ash content is ≤1%; the average particle size of silicon carbide is 300 mesh; the bulk density of copper powder is 0.9g / cm 3 ;

[0054] 2. The preparation method of the grounding brush is carried out according to the following steps:

[0055] 1) Weighing: Weigh graphite powder, copper powder, tin powder, zinc carbonate, anti-wear agent and washing oil respectively;

[0056] 2) Mixing: put graphite powde...

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Abstract

The invention discloses a ground brush and a preparation method thereof, belonging to the technical field of brushes. The grounding brush of the invention is prepared from graphite powder, copper powder, tin powder, zinc carbonate, antiwear agent and ishing oil. The invention also provides a preparation method of a grounding brush. The method comprises the following steps of: putting raw materialsinto a cold mixer for mixing, passing through a 40-mesh sieve, placing a lower part of the sieve in a mold, and pressing under 4t / cm3 to obtain a bulk density of 5.65 g / cm3; and then, pressing the lower part of the sieve in a mold to obtain a bulk density of 5.65 g / cm3. 5.75 g / cm3 of brush blank, placing the brush blank in a mesh belt furnace, and heating at 248 DEG C + / 15 DEG C, 300 DEG C + / 15 DEG C, 4000 DEG C + / 15 DEG C, 500 DEG C + / 15 DEG C, 600 DEG C + / 15 DEG C, 700 DEG C + / 15 DEG C, 780 DEG C + / 15 DEG C for 1h-1.5h. The grounding brush of the invention has low resistivity, good abrasionresistance, no lead, long service life, high abrasion resistance, and is suitable for electric machines.

Description

technical field [0001] The invention relates to a grounding brush and a preparation method thereof, belonging to the technical field of electric brushes. Background technique [0002] Some rotating machinery, due to its own mechanical or electrical properties, will generate induced potential and voltage on the shaft when rotating. If the induced voltage cannot be dealt with, such as no grounding brush or voltage release system installed on the rotating machinery, the The induced voltage will find a release path, then the metal body on the rotating machine will become the ground conductor of the induced voltage, a very typical example is the bearing or seal of the rotor, the arc generated by the induced voltage is electrostatic discharge, and these arcs will damage the metal Surface and increased normal operating seal gaps between components, if electrostatic discharge is not dealt with in a timely manner, bearings and seals will gradually damage, the dynamic characteristics ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01R39/22H01R43/12
CPCH01R39/22H01R43/12
Inventor 马庆春佟立国于淼
Owner 美尔森哈碳电碳(哈尔滨)有限公司
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