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Test bed and measurement method for measuring friction coefficient of electric brush

A friction coefficient, test bench technology, applied in measuring devices, instruments, mechanical devices, etc., can solve problems such as low measurement accuracy, achieve strong anti-interference ability, reduce human resource costs, and improve accuracy.

Active Publication Date: 2014-06-18
严格集团股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the current device and method for measuring the dynamic friction coefficient have low measurement accuracy of the brush dynamic friction coefficient under high-speed conditions. The present invention provides a brush friction coefficient test bench and its measurement method

Method used

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  • Test bed and measurement method for measuring friction coefficient of electric brush
  • Test bed and measurement method for measuring friction coefficient of electric brush

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Experimental program
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specific Embodiment approach 1

[0030] Embodiment 1: Combining figure 1 Describe this embodiment, the brush friction coefficient test bench described in this embodiment, the test bench includes a test tool and a control system;

[0031] The test tooling includes a support base 1, a torque sensor 2, a lever arm 3, a pressure sensor 4, a brush mounting tooling 5, a copper-inlaid turntable 6, a radial bearing 7 and a drag motor 8;

[0032] The test bench support base 1 is a three-layer support base, and a torque sensor 2 is arranged on the topmost layer of the test bench support base 1. The output shaft 2-1 of the torque sensor 2 is vertically connected to the top of the lever arm 3, and the arm lever is connected vertically. The bottom end of 3 is fixedly connected with the upper surface of the pressure sensor 4,

[0033] The brush mounting fixture 5 is divided into an upper part and a lower part, and the upper part and the lower part are connected by screws; the lower surface of the pressure sensor 4 is fixe...

specific Embodiment approach 2

[0041] Specific implementation mode 2: Combining figure 2 This embodiment is described. This embodiment is a further limitation of the brush friction coefficient test bench described in Embodiment 1. The control system includes a torque signal test unit, a positive pressure signal test unit, a signal acquisition and conditioning unit, a control unit, and a control system. and processing unit and communication unit;

[0042] Torque signal testing unit, used to receive the torque signal measured by the torque sensor 2;

[0043] a positive pressure signal test unit for receiving the positive pressure signal measured by the pressure sensor 4;

[0044] The signal acquisition and conditioning unit is used for sampling the received torque signal and the positive pressure signal, conditioning the sampling signal, and sending it to the control and processing unit;

[0045] The control and processing unit is used to control the rotation of the driving motor 8, and is also used to sel...

specific Embodiment approach 3

[0048] Embodiment 3: This embodiment is a further limitation of the brush friction coefficient test bench described in Embodiment 3, and the torque sensor 2 is implemented by a loaded dynamometer.

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Abstract

The invention discloses a test bed and a measurement method for measuring the friction coefficient of an electric brush, relates to a friction coefficient measurement device and method, and aims to solve the problem of low measurement accuracy of a dynamic friction coefficient of an electric brush under a high-speed condition during conventional measurement. The test bed comprises a test tool and a control system, wherein the test tool is perpendicularly connected with a pressure sensor through a force arm rod by a torque sensor; the pressure sensor is connected with an electric brush clamping tool and the tested electric brush in the electric brush clamping tool; the electric brush clamping tool is arranged on the upper part of a copper-embedded turntable; a dragging motor drives the copper-embedded turntable to rotate; the upper part and the lower part of the electric brush clamping tool are in threaded connection with each other; the force arm rod is a telescopic force arm rod; the control system enables the dragging motor to rotate to acquire signals of the pressure sensor and the torque sensor; during measurement, the electric brush is in contact with the copper-embedded turntable, a thread and the force arm rod are adjusted, and the reading of the pressure sensor is in a ruled range; the control system calculates a friction coefficient of the tested electric brush according to measured data. The test bed is used for measuring the dynamic friction coefficient of the electric brush under a high-speed condition.

Description

technical field [0001] The invention relates to a friction coefficient measurement device and a measurement method thereof, in particular to a brush friction coefficient test bench and a measurement method thereof. Background technique [0002] The brush is a conductive component that is in sliding contact with the moving part to form an electrical connection. The brush is used on the commutator or slip ring as a sliding contact body for importing and exporting current. It has good electrical, thermal and lubricating properties, and has certain mechanical strength and the instinct of reversing sparks. Almost all DC motors and commutated motors use brushes, which are an important component of the motor. Since the DC brush motor requires good lubricity, the friction coefficient of the brush is an important parameter for the performance of the brush. [0003] At present, the measurement of friction coefficient is mainly carried out by measuring the positive pressure and fric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N19/02
Inventor 关宇东丁焱于博良提纯利仲小挺杜克宁宇朱雨桐徐志剑
Owner 严格集团股份有限公司
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