Intelligent monitoring device for carbon brush wear

Abstract

The utility model provides an intelligent monitoring device for carbon brush wear, including a brush holder, a brush holder and a carbon brush, wherein a coil spring is provided at the rear end of the carbon brush; the rear end of the brush holder is connected to the brush holder, the interior of the brush holder is hollow and has an elastic device built therein, and the brush holder can control the rise and fall of the elastic device; the body of the monitoring unit is fixed on the brush holder, and an infrared distance sensor, a temperature measuring device, a battery and an alarm are integrated therein, wherein the infrared distance sensor is installed behind the coil spring and can measure the displacement data of the coil spring; a temperature measuring hole is provided on the side of the mounting groove of the brush holder, and the temperature measuring device is fixed in the temperature measuring hole and can measure the temperature of the carbon brush; the alarm is connected to the infrared distance sensor and the temperature measuring device by signal, and the battery can provide power to the infrared distance sensor, the temperature measuring device and the alarm. The utility model can monitor the wear and temperature of the carbon brush in real time, improve the monitoring accuracy, and enable the carbon brush to achieve efficient and stable current transmission.

Description

Technical Field

[0001] This utility model patent relates to an intelligent monitoring device for carbon brush wear. Background Art

[0002] When the generator is running, the excitation current is transmitted to the brush holder through the brush holder conductive ring, and then to the brush box, carbon brush, and finally to the generator collector ring. During operation, due to the swing of the collector ring, the unequal spring pressure of the top carbon brush, and the different contact resistance, the current distribution dust on each carbon brush is uneven. After field measurement, it is possible that the overcurrent of some carbon brushes is close to 0, and the current of some carbon brushes exceeds 2-3 times the rated allowable current. Generally, the larger the overcurrent of the carbon brush, the higher its temperature. In severe cases, the temperature of the carbon brush can reach more than 300℃, which has a serious impact on the operation and maintenance safety of the generator.

[0003] Early carbon brush wear monitoring often relied on manual inspection, which was not only inefficient but also prone to human error. Since carbon brush wear is a gradual process, regular and precise measurements are required to accurately grasp its wear condition, but manual inspection often makes it difficult to achieve this.

[0004] At present, the traditional method of measuring the wear of carbon brushes is to embed the sensor into the carbon brushes. After embedding, there is a risk of cracking of the carbon brushes due to random vibration of the group. The embedded monitoring structure needs to modify the carbon brushes during installation, which increases the complexity and technical requirements of the installation. At the same time, since the structure is embedded inside the carbon brush, once a failure or maintenance is required, the entire carbon brush will need to be disassembled or replaced, which increases the difficulty and cost of maintenance. The embedded monitoring structure may change the original structure and performance of the carbon brush, such as affecting its conductivity and wear resistance. This may cause the carbon brush to fail or degrade during operation, thereby affecting the normal operation of the motor. Since the monitoring structure is directly embedded inside the carbon brush, it may be affected by various factors such as carbon brush wear, vibration, temperature change, etc., which may affect its monitoring accuracy and reliability. In addition, if the design of the monitoring structure is unreasonable or the material selection is inappropriate, it may also cause errors or distortions in the monitoring results. Utility Model Content

[0005] Therefore, the purpose of the utility model is to provide an intelligent monitoring device for carbon brush wear, so as to improve the monitoring accuracy and enable the carbon brush to achieve efficient and stable current transmission.

[0006] The technical solution provided by the utility model is:

[0007] A carbon brush wear intelligent monitoring device comprises a brush holder and a brush holder, and is characterized in that:

[0008] A mounting groove is provided at the upper front end of the brush holder, and the carbon brush is slidably arranged in the mounting groove. A coil spring is provided at the rear end of the carbon brush, and the coil spring abuts against the rear end of the carbon brush to push the carbon brush forward under normal conditions.

[0009] The rear end of the brush holder is horizontally slidably connected to a telescopic handle of the brush holder, and the body of the telescopic handle is formed with a first groove, a second groove, and a V-shaped double slope structure connected between the first groove and the second groove, and the first groove is deeper than the second groove;

[0010] The interior of the brush holder is hollow and has an ejector built in. The body of the ejector is pivotally connected to the brush holder through a pin shaft so that its front and rear ends can move up and down. The front end of the ejector extends upward from the brush holder and is located below the carbon brush. The rear end of the ejector forms a spherical protrusion downward. The position of the spherical protrusion is selectively opposite to the first groove and the second groove of the brush holder. A spring is also installed between the brush holder and the ejector. The spring enables the front end of the ejector to push up against the carbon brush under normal conditions.

[0011] The main body of the monitoring unit is fixed on the brush holder, and an infrared ranging sensor, a temperature measuring device, a battery and an alarm are integrated inside. The infrared ranging sensor is installed behind the coil spring and can measure the displacement data of the coil spring; a temperature measuring hole is provided on the side of the mounting groove of the brush holder, and the temperature measuring device is fixed in the temperature measuring hole and can measure the temperature of the carbon brush; the alarm is connected to the infrared ranging sensor and the temperature measuring device by signal, and the battery can provide power to the infrared ranging sensor, the temperature measuring device and the alarm.

[0012] Wherein: one end of a spring sheet is fixed on the installation slot through a clamping slot, and the spring sheet extends to the other end of the coil spring.

[0013] Wherein: the brush holder has a bracket, the bracket is fixedly connected to the rear end of the brush holder, the telescopic handle is horizontally slidably connected to the bracket, a retaining spring is provided between the bracket and the telescopic handle, and the retaining spring normally makes the first groove of the telescopic handle and the spherical protrusion at the rear end of the ejector relative to each other.

[0014] The utility model can monitor the wear amount and temperature of the carbon brush in real time, improve the monitoring accuracy, and enable the carbon brush to achieve efficient and stable current transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of an intelligent monitoring device for carbon brush wear.

[0016] Figure 2 It is a cross-sectional schematic diagram of the intelligent monitoring device for carbon brush wear.

[0017] Explanation of the reference numerals: 1 brush holder; 1-1 telescopic handle; 1-2 first groove; 1-3 second groove; 1-4 bracket; 1-5 retaining spring; 2 brush holder; 3 carbon brush; 4 monitoring unit; 4-1 alarm; 4-2 temperature measuring device; 4-3 battery; 4-4 infrared ranging sensor; 5 bolt; 6 spring; 6-1 coil spring; 6-2 retaining slot; 7 actuator; 7-1 pin shaft; 7-2 spring; 7-3 spherical bump. DETAILED DESCRIPTION

[0018] like Figure 1 , Figure 2 As shown, the utility model provides an intelligent monitoring device for carbon brush wear, comprising a brush holder 2 and a brush holder 1, wherein:

[0019] A mounting groove is provided at the upper position of the front end (left end in the figure) of the brush holder 2, and the carbon brush 3 is slidably arranged in the mounting groove. One end of a spring 6 is fixed to the mounting groove through a clamping groove 6-2, and a coil spring 6-1 extends from the other end of the spring 6. The coil spring 6-1 presses against the rear end of the carbon brush 3, and pushes the carbon brush 3 forward under normal conditions.

[0020] The rear end of the brush holder 2 is horizontally slidably connected to the telescopic handle 1-1 of the brush holder 1. The body of the telescopic handle 1-1 is formed with a first groove 1-2, a second groove 1-3 and a V-shaped double slope structure connected between the first groove 1-2 and the second groove 1-3. The first groove 1-2 is deeper than the second groove 1-3.

[0021] The interior of the brush holder 2 is hollow and has a built-in ejector 7. The body of the ejector 7 is pivotally connected to the brush holder 2 through a pin shaft 7-1, so that its front and rear ends can move up and down. The front end of the ejector 7 extends upward from the brush holder 2 and is located below the carbon brush 3. The rear end of the ejector 7 forms a spherical bump 7-3 downward. The position of the spherical bump 7-3 is selectively opposite to the first groove 1-2 and the second groove 1-3 of the telescopic handle 1-1. A spring 7-2 is also installed between the brush holder 2 and the ejector 7. The spring 7-2 enables the front end of the ejector 7 to push up against the carbon brush 3 under normal conditions.

[0022] In this embodiment, the brush holder 1 has a bracket 1-4, the bracket 1-4 is fixedly connected to the rear end of the brush holder 2, the telescopic handle 1-1 is horizontally slidably connected to the bracket 1-4, a retaining spring 1-5 is provided between the bracket 1-4 and the telescopic handle 1-1, and the retaining spring 1-5 normally makes the first groove 1-2 of the telescopic handle 1-1 and the spherical protrusion 7-3 at the rear end of the ejector 7 to be opposite to each other; a T-shaped platform is provided at the front end of the telescopic handle 1-1, which can ensure that the telescopic handle 1-1 can achieve a relaxed and moderate displacement action forward and backward in the bracket 1-4;

[0023] Before installing the carbon brush 3, by pushing the telescopic handle 1-1 forward, the spherical protrusion 7-3 at the rear end of the actuator 7 passes over the V-shaped double slope structure and is stuck in the second groove 1-3. At this time, the rear end of the actuator 7 is pushed upward, and the front end of the actuator 7 is retracted into the brush holder 2, so that the carbon brush 3 is conveniently installed in the mounting groove of the brush holder 2; thereafter, under the elastic restoring force of the retaining spring 1-5 of the telescopic handle 1-1, the spherical protrusion 7-3 at the rear end of the actuator 7 passes over the V-shaped double slope structure and extends into the first groove 1-2. Since the first groove 1-2 is lower than the second groove 1-3, the rear end of the actuator 7 can be freely raised and lowered at this time, and the front end of the actuator 7 is pushed upward against the carbon brush 3 under the elastic force of the spring 7-2, thereby increasing the friction between the carbon brush 3 and the mounting groove, so that the carbon brush 3 can be stably installed in the mounting groove;

[0024] The utility model is also provided with a monitoring unit 4, the body of the monitoring unit 4 is fixed to the brush holder 2 by bolts 5, and an infrared distance sensor 4-4, a temperature measuring device 4-2, a battery 4-3 and an alarm 4-1 are integrated inside. The infrared distance sensor 4-4 is installed behind the coil spring 6-1. When the carbon brush 3 is worn, the coil spring 6-1 pushes the carbon brush 3 to move forward. The infrared distance sensor 4-4 measures the displacement data of the coil spring 6-1, and can calculate the wear value of the carbon brush 3. When the wear value of the carbon brush 3 exceeds the set threshold, the alarm 4-1 will send out an alarm signal; a temperature measuring hole is provided on the side of the installation groove of the brush holder 2, and the temperature measuring device 4-2 is fixed in the temperature measuring hole. When the temperature of the carbon brush 3 exceeds the threshold, the temperature measuring device 4-2 will cause the alarm 4-1 to send out a warning signal to remind the operator to maintain or replace the carbon brush 3; the battery 4-3 can provide power to the infrared distance sensor 4-4, the temperature measuring device 4-2 and the alarm 4-1.

[0025] The alarm information of the alarm 4-1 includes the event number, alarm level, time and event content, etc., and is recorded and stored. The alarm system has the function of avoiding frequent alarms of the same signal without obvious development.

Claims

1. An intelligent monitoring device for carbon brush wear, comprising a brush holder and a brush holder, characterized in that: A mounting groove is provided at the upper front end of the brush holder, and the carbon brush is slidably arranged in the mounting groove. A coil spring is provided at the rear end of the carbon brush, and the coil spring abuts against the rear end of the carbon brush to push the carbon brush forward under normal conditions. The rear end of the brush holder is horizontally slidably connected to a telescopic handle of the brush holder, and the body of the telescopic handle is formed with a first groove, a second groove, and a V-shaped double slope structure connected between the first groove and the second groove, and the first groove is deeper than the second groove; The interior of the brush holder is hollow and has an ejector built in. The body of the ejector is pivotally connected to the brush holder through a pin shaft so that its front and rear ends can move up and down. The front end of the ejector extends upward from the brush holder and is located below the carbon brush. The rear end of the ejector forms a spherical protrusion downward. The position of the spherical protrusion is selectively opposite to the first groove and the second groove of the brush holder. A spring is also installed between the brush holder and the ejector. The spring enables the front end of the ejector to push up against the carbon brush under normal conditions. The main body of the monitoring unit is fixed on the brush holder, and an infrared ranging sensor, a temperature measuring device, a battery and an alarm are integrated inside. The infrared ranging sensor is installed behind the coil spring and can measure the displacement data of the coil spring; a temperature measuring hole is provided on the side of the mounting groove of the brush holder, and the temperature measuring device is fixed in the temperature measuring hole and can measure the temperature of the carbon brush; the alarm is connected to the infrared ranging sensor and the temperature measuring device by signal, and the battery can provide power to the infrared ranging sensor, the temperature measuring device and the alarm.

2. The intelligent monitoring device for carbon brush wear according to claim 1 is characterized in that: One end of a spring sheet is fixed on the installation slot through a clamping slot, and the spring sheet extends out of the coil spring toward the other end.

3. The intelligent monitoring device for carbon brush wear according to claim 1 is characterized in that: The brush holder has a bracket, which is fixedly connected to the rear end of the brush frame. The telescopic handle is horizontally slidably connected to the bracket. A retaining spring is provided between the bracket and the telescopic handle. Under normal conditions, the retaining spring makes the first groove of the telescopic handle face the spherical protrusion at the rear end of the ejector.

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