CN212462302U

CN212462302U - Direct current motor carbon brush wear monitoring device based on tilt angle sensor

Info

Publication number: CN212462302U
Application number: CN202021159352.9U
Authority: CN
Inventors: 相恒堂; 龚箭
Original assignee: Xinjiang Maya Electric Power Technology Co ltd
Current assignee: Xinjiang Maya Electric Power Technology Co ltd
Priority date: 2020-06-19
Filing date: 2020-06-19
Publication date: 2021-02-02
Anticipated expiration: 2030-06-19

Abstract

A direct current motor carbon brush abrasion monitoring device based on an inclination angle sensor is characterized in that a brush holder is sleeved on a carbon brush, the brush holder and the carbon brush form sliding fit, a support is fixedly connected with the brush holder, a pressing sheet is positioned above the carbon brush, a shaft is erected on two plate type shaft brackets on a rack through a bearing, the right part of the pressing sheet is fixedly connected on the shaft, the upper end of an extension spring is fixed on the bottom surface of the pressing sheet, the lower end of the extension spring is fixed on the lower part of the rack, the extension spring is arranged in an obliquely downward or vertical direction, the left bottom surface of the pressing sheet is tightly attached to the top surface of the carbon brush under the action of the extension spring, and; the inclination angle sensor is arranged on the pressing sheet. The device can monitor the carbon brush of the direct current motor in real time and has the advantages of direct observation, convenience in installation, accurate and reliable performance and easiness in expansion and compatibility.

Description

Direct current motor carbon brush wear monitoring device based on tilt angle sensor

Technical Field

The utility model relates to a direct current motor technical field, concretely relates to direct current motor carbon brush wearing and tearing monitoring devices based on angular transducer can the large-scale direct current motor carbon brush wearing and tearing condition of real-time supervision, sends alarm signal when direct current motor carbon brush wearing and tearing surpass the wearing and tearing cut-off line, but wide popularization and application in large-scale direct current motors such as metallurgy, oil drilling, colliery.

Background

The carbon brushes of a dc motor often wear during use. If the carbon brushes are worn too much and not replaced, serious consequences can be caused to the motor. If once the carbon brush is worn excessively, the damage of the commutator is easily caused, or the armature current is abnormal, the motor is overheated, the control components are damaged, and even the motor is burnt out.

The most direct method for monitoring the abrasion of the carbon brush of the existing direct current motor is manual detection and maintenance at regular intervals, is limited by continuous operation of equipment, can be checked only when a system and the equipment stop, and is limited in detection time; all carbon brushes need to be detached and checked one by one, and the efficiency is very low; failure cannot be predicted and handled in advance, and scientificity is lacked.

In another method for monitoring the abrasion of the carbon brush of the direct current motor, a proximity switch is additionally arranged beside the carbon brush or a pressing sheet for monitoring, but due to the fact that installation space is limited, the detection method and the detection effect are rough, the precision is not high, and the method is not popularized in a large area.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a direct current motor carbon brush wearing and tearing monitoring devices based on angular transducer aims at avoiding the serious wearing and tearing of direct current motor carbon brush and the equipment potential safety hazard that brings through the angular transducer monitoring direct current motor carbon brush wearing and tearing condition.

The purpose of the utility model is realized like this: a direct current motor carbon brush abrasion monitoring device based on an inclination angle sensor is characterized in that a brush holder is sleeved on a carbon brush, the brush holder and the carbon brush form sliding fit, a rack is fixedly connected with the brush holder, a pressing sheet is positioned above the carbon brush, a shaft is erected on two plate type shaft brackets on the rack through a bearing, the right part of the pressing sheet is fixedly connected on the shaft, the upper end of an extension spring is fixed on the bottom surface of the pressing sheet, the lower end of the extension spring is fixed on the lower part of the rack, the extension spring is arranged in an inclined downward direction or a vertical direction, the left bottom surface of the pressing sheet is tightly attached to the top surface of the carbon brush under the action of the extension spring; the inclination angle sensor is arranged on the pressing sheet.

The tilt sensor is a single-axis tilt sensor.

The shape of the left part of the tablet is as follows: the carbon brush is formed by connecting a horizontal section, a right inclined upward section and another horizontal section end to end, and the top of the carbon brush is matched with the right inclined upward section and the other horizontal section of the left part of the pressing sheet.

The device is also provided with a controller, a communication module and a touch screen; the tilt angle sensor is connected with the controller and the communication module in sequence, the controller and the communication module are both installed on the rack, and output signals of the communication module are transmitted to the touch screen in a wireless mode.

The brush holder is fixed at the front end of the rack, the carbon brush is movably arranged in the brush holder, the spring is always in a tensioning state during work, the pressing sheet is pressed on the carbon brush by the aid of the spring tension belt, the carbon brush is tightly attached to the commutator, a gap is formed between the bottom surface of the pressing sheet and the top surface of the carbon brush when the carbon brush is worn under the action of the spring, and the pressing sheet can continue to press the carbon brush downwards due to the spring tension.

A miniature tilt angle sensor is arranged on the plane of the upper end of the pressing sheet. The angle measured by the tilt sensor is converted into the wear height of the brush by the controller calculation. The wear condition of the carbon brush of the large direct current motor is monitored in real time through the touch screen, and early warning prompt is carried out.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a direct current motor carbon brush wearing and tearing monitoring devices based on angular transducer can realize the real-time supervision of online real-time supervision direct current motor carbon brush degree of wear, and the touch-sensitive screen can remind the user in time to change the carbon brush after the carbon brush wearing and tearing to a certain degree, has eliminated the potential safety hazard that the serious wearing and tearing of carbon brush brought, has that the cost of manufacture is low (angular transducer volume more and more miniaturation, price constantly descend), observes directness, simple to operate, accurate reliable, the compatible advantage of easily expanding of performance.

Drawings

Fig. 1 is a schematic view of a dc motor carbon brush wear monitoring device based on a tilt sensor according to the present invention;

description of the main reference numerals:

1-a frame; 2-a commutator; 3-carbon brush; 4-a tilt sensor; 5-a controller; 6-a communication module; 7-a touch screen; 11-brush holder; 12-axis; 13-a tension spring; 14-plate type shaft bracket (composed of two identical plate members); 15-tabletting.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Fig. 1 shows (front view), a dc motor carbon brush wear monitoring device based on an inclination angle sensor, a brush holder 11 is sleeved on a carbon brush, the brush holder 11 and the carbon brush form a sliding fit, a frame 1 is fixedly connected with the brush holder 11, a pressing sheet 15 is positioned above the carbon brush 3, a shaft 12 is erected on two plate-type shaft brackets 14 on the frame 1 through a bearing, the right part of the pressing sheet 15 is fixedly connected on the shaft 12, the upper end of an extension spring 13 is fixed on the bottom surface of the pressing sheet 15, the lower end of the extension spring is fixed on the lower part of the frame 1, the extension spring 13 is arranged in an inclined downward direction or a vertical direction, the bottom surface of the left part of the pressing sheet 15 is tightly attached to the top surface of the carbon brush 3 under the action of the extension spring 13; the tilt sensor 4 is provided on the pressure sheet 15. The shape of the left part of the tablet 15 is: the carbon brush is formed by connecting a horizontal section, a right inclined upward section and another horizontal section end to end, and the top of the carbon brush 3 is matched with the right inclined upward section and the other horizontal section of the left part of the pressing sheet 15. The shape of the pressing sheet is particularly suitable for a spring diagonal drawing mode.

The brush holder is fixed at the front end of the rack, the carbon brush is movably arranged in the brush holder, the pressing sheet is pressed on the carbon brush by the aid of elastic pulling force, the carbon brush is tightly attached to the commutator, and the pressing sheet can continue to press the carbon brush downwards every time the carbon brush is abraded under the action of the spring.

A miniature tilt angle sensor is arranged on the plane of the upper end of the pressing sheet. The tilt sensor is a single-axis tilt sensor. The utility model discloses preferably be voltage type output unipolar inclination sensor. The utility model adopts a 12V DC power supply, and is also provided with a controller 5, a communication module 6 and a touch screen 7; the tilt angle sensor 4 is connected with the controller 5 and the communication module 6 in sequence, the controller 5 and the communication module 6 are both installed on the rack 1, and an output signal of the communication module 6 is transmitted to the touch screen 7 in a wireless mode.

The sheeting rotates about axis 12. The inclination angle sensor is arranged on the upper plane of the pressing sheet. The new carbon brush initial position was set as the 0 degree position. When the carbon brush is pressed downwards by the pressing sheet to move downwards, different angles of the inclination angle sensor correspond to different carbon brush abrasion heights. The controller converts the angle measured by the tilt sensor into the wear height of the brush through calculation. And compared to the alarm wear height. The touch screen monitors and displays the wear condition of the carbon brush of the large direct current motor in real time and carries out early warning and prompting.

Obviously, the above example is described only by monitoring the wear of a single carbon brush of the direct current motor, and all the wear monitoring of the carbon brush of the whole motor can be centralized in the above system. The direct current motor with the carbon brush structure is expanded to other direct current motors with the similar carbon brush structures, the carbon brush and the pressing sheet are slightly different in shape and position, and the installation form of the tilt angle sensor can be correspondingly slightly adjusted. All the simple modifications, equivalent changes and modifications made by the technical entity of the present invention to the above embodiments all belong to the scope of the technical solution of the present invention.

Claims

1. A direct current motor carbon brush abrasion monitoring device based on an inclination angle sensor is characterized in that a brush holder (11) is sleeved on a carbon brush, the brush holder (11) and the carbon brush form sliding fit, a rack (1) is fixedly connected with the brush holder (11), a pressing sheet (15) is positioned above the carbon brush (3), a shaft (12) is erected on two plate-type shaft brackets (14) on the rack (1) through a bearing, the right part of the pressing sheet (15) is fixedly connected on the shaft (12), the upper end of a tension spring (13) is fixed on the bottom surface of the pressing sheet (15), the lower end of the tension spring is fixed on the lower part of the rack (1), the tension spring (13) is arranged in an inclined downward direction or a vertical direction, under the action of the tension spring (13), the bottom surface of the left part of the pressing sheet (15) is tightly attached to the top surface of the carbon brush (3), and the bottom surface of the carbon brush (3) extending; the inclination angle sensor (4) is arranged on the pressing sheet (15).

2. The device for monitoring the carbon brush abrasion of the direct current motor based on the inclination angle sensor is characterized in that the inclination angle sensor (4) is a single-shaft inclination angle sensor.

3. The carbon brush wear monitoring device for the direct current motor based on the inclination angle sensor as claimed in claim 2, wherein the shape of the left part of the pressing sheet (15) is as follows: the carbon brush is formed by connecting a horizontal section, a right inclined upward section and another horizontal section end to end, and the top of the carbon brush (3) is matched with the right inclined upward section and the other horizontal section of the left part of the pressing sheet (15).

4. The direct current motor carbon brush abrasion monitoring device based on the inclination angle sensor is characterized by further comprising a controller (5), a communication module (6) and a touch screen (7); inclination sensor (4) connect controller (5) and communication module (6) in order, and controller (5) and communication module (6) are all installed in frame (1), and communication module's (6) output signal transmits to touch-sensitive screen (7) through wireless mode.