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Material for preparing locomotive traction motor carbon brush

A technology for traction motors and carbon brushes, which is applied in the field of preparing carbon brush materials for locomotive traction motors, which can solve the problems of commutation performance limitations, carbon brush temperature rise, and working current limitations, so as to improve orientation and wear resistance Uniform performance and performance

Active Publication Date: 2016-10-19
SUZHOU DONEKA NEW MATERIALS CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to achieve high current density and avoid excessive temperature rise of carbon brushes during work, materials with medium resistivity (40-50μΩM) are usually used to prepare carbon brushes, but their commutation performance is greatly limited; in order to To obtain good commutation, at the expense of working current density, carbon brushes are made of materials with high resistivity (55-65μΩM). Even if a good ventilation and cooling auxiliary system is prepared, the temperature rise of carbon brushes will not increase. Not optimistic
Usually, the commutation capability and the working current are opposite, because to improve the commutation capability, the resistivity of the material (commutation resistance) must be increased, and the increase of the resistivity will cause the temperature of the carbon brush to rise, and the working current will be severely limited.
[0006] Due to the constraints of production technology, at present, there is no carbon brush material in the foreign or domestic market that can be applied to both diesel locomotive traction motors and electric locomotive traction motors.

Method used

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  • Material for preparing locomotive traction motor carbon brush
  • Material for preparing locomotive traction motor carbon brush
  • Material for preparing locomotive traction motor carbon brush

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0085] 1. Preparation of soft carbon black powder

[0086] 1-A) Prepare materials according to the following weight ratio (kg):

[0087]

[0088] 1-B) Add acetylene carbon black and stearic acid to a double paddle mixing pot preheated to 150°C, close the lid and mix for 20 minutes, then add medium-temperature pitch and coal tar, close the lid and mix for 60 minutes, turn off the power to obtain a mixture material.

[0089] 1-C) Take out the mixed material, cool it naturally to 80° C., and press it into a material column; wherein, the pressure of the pressing treatment is 5 MPa.

[0090] 1-D) Put the material column in the roasting furnace, isolate the air and roast, the maximum temperature is 1200 ° C for 10 hours, and the roasting curve is 288 hours; after cooling out of the furnace, put the roasted material column into the graphitization furnace, and use pitch As a filler, it can be rapidly graphitized when electrified (the temperature can be raised freely), and it can ...

Embodiment 2

[0121] 1. Preparation of soft carbon black powder

[0122] In addition to step 1-A) according to the following weight ratio preparation (kg):

[0123]

[0124] 2. Preparation of carbon brush blanks

[0125] 2-A) Prepare raw materials (kg) according to the following weight ratio:

[0126]

[0127] 2-B) Mixed extrusion treatment

[0128] Preheat the second-ninth section of the twin-screw extrusion mixer cavity to 110°C, add the raw materials in step 2-A) to the first section of the twin-screw extrusion mixer at a constant speed, and continue Raise the temperature to 200°C and carry out mixing and extrusion treatment to obtain the mixed material;

[0129] 2-C) The first grinding treatment

[0130] The mixed material was pulverized to 74 μm in a Raymond mill, and then pulverized to 48 μm in a fluidized bed jet mill.

[0131] 2-D) Blending, rolling

[0132] Preheat the double paddle mixer to 155°C, put the mixed material crushed to 48μm into the double paddle mixer, clo...

Embodiment 3

[0142] 1. Preparation of soft carbon black powder

[0143] In addition to step 1-A) according to the following weight ratio preparation (kg):

[0144]

[0145]

[0146] 2. Preparation of carbon brush blanks

[0147] 2-A) Prepare raw materials (kg) according to the following weight ratio:

[0148]

[0149] 2-B) Mixed extrusion treatment

[0150] Preheat the second-ninth section of the twin-screw extrusion mixer chamber to 130°C, add the raw materials in step 2-A) to the first section of the twin-screw extrusion mixer at a uniform speed, and continue Raise the temperature to 210°C and carry out mixing and extrusion treatment to obtain the mixed material;

[0151] 2-C) The first grinding treatment

[0152] The mixed material was pulverized to 74 μm in a Raymond mill, and then pulverized to 48 μm in a fluidized bed jet mill.

[0153] 2-D) Blending, rolling

[0154] Preheat the double paddle mixer to 160°C, put the mixed material ground to 48μm into the double paddle...

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Abstract

The invention discloses a material for preparing a locomotive traction motor carbon brush. The material comprises soft carbon black powder, sprayed carbon black, pitch coke powder, graphite powder, a pore forming agent, a directional auxiliary agent, modified asphalt and a lubricant. According to the present invention, the carbon brush prepared from the material has characteristics of high rupture strength, good direction change performance and high passing current density, and is used for the diesel locomotive traction motor and the electric locomotive traction motor.

Description

technical field [0001] The invention belongs to the technical field of locomotives, in particular to a material for preparing carbon brushes for traction motors of locomotives. Background technique [0002] The material of carbon brushes is the prerequisite for the production of high-quality carbon brushes. Carbon brushes for traction motors of railway locomotives, as the core components of locomotive motors, have always been the most important research and development points of carbon brush manufacturers. The carbon brushes produced by the characteristics of the material type are used in various traction motors. However, the existing carbon brushes for locomotive traction motors cannot be applied to all types of locomotive traction motors due to different product performances, which brings a lot of inconvenience to locomotive users. However, the carbon brush materials of locomotive traction motors in my country still almost follow the technological thinking of the 1960s, a...

Claims

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Application Information

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IPC IPC(8): C04B38/00C04B35/532C01B31/04
Inventor 顾志平朱约辉易文斌
Owner SUZHOU DONEKA NEW MATERIALS CORP LTD
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