Carbon brush real-time monitoring system

Abstract

A carbon brush real-time monitoring system comprises a carbon brush body, the tail end of the carbon brush body is provided with a constant-force elastic piece, the constant-force elastic piece continuously gives thrust to the carbon brush body, and the tail end of the carbon brush body is connected with a display lamp. And the constant-force elastic piece and the display lamp are both connected with the electrical control loop. According to the invention, the real-time working state of the carbon brush can be accurately monitored for a small power station.

Description

Technical Field

[0001] The utility model belongs to the technical field of carbon brush wear detection devices, and particularly relates to a carbon brush real-time monitoring system. Background Art

[0002] A carbon brush, also called a brush, as a sliding contact part, is widely used in many electrical devices. The main materials of carbon brushes are graphite, impregnated graphite, metal graphite, etc. A carbon brush is a device for transmitting energy or signals between the fixed part and the rotating part of a motor, a generator or other rotating machinery. It is generally made of pure carbon plus a solidifying agent, and its shape is generally a square block, which is stuck on a metal bracket, and a spring presses the carbon brush tightly on the rotating shaft.

[0003] Since the main component of the carbon brush is carbon and it is easy to wear, when the unit vibrates greatly and drives the slip ring to vibrate together, it will cause uneven friction of the brush column, loose leads and springs. Or factors such as the carbon brush being too short after wear and not being replaced in time will affect the normal operation of the generator, cause equipment damage, and affect motor commutation. The carbon brush needs to be regularly maintained and replaced, and the carbon deposit needs to be cleaned. Therefore, it is particularly important to accurately control the working state of the carbon brush.

[0004] Currently, the monitoring of carbon brushes mainly adopts carbon brush online monitoring devices. For large power plants, the existing state of carbon brushes can be quickly identified, such as the voltage, current and length of the carbon brush, to determine whether the carbon brush needs to be replaced and predict whether the subsequent state of the carbon brush will cause slip ring arcing. However, for general small power stations, due to the small capacity of the single-unit generator set, the entire slip ring chamber is small and does not have the conditions for installing a carbon brush online monitoring device.

[0005] For the inspection of the slip ring chamber in general small power stations, manual inspection is mainly relied on. By judging the position node of the spring to determine whether the length of the carbon brush needs to be replaced, but it is often unreliable to identify the state of the carbon brush with the human eye only by relying on tools such as flashlights in a small and enclosed space like the slip ring chamber. Summary of the Utility Model

[0006] The utility model provides a carbon brush real-time monitoring system to solve the problem that it is difficult for small power stations to accurately control the real-time working state of carbon brushes.

[0007] To solve the above technical problems, the technical solution adopted by the utility model is:

[0008] A carbon brush real-time monitoring system includes a carbon brush body. A constant force elastic member is arranged at the end of the carbon brush body, and the constant force elastic member continuously gives a thrust to the carbon brush body. A display lamp is connected to the end of the carbon brush body.

[0009] It also includes an electrical control circuit, and the carbon brush body, the constant force elastic member and the display lamp are all connected to the electrical control circuit.

[0010] Further, it further includes a base, the carbon brush body and the display lamp are both installed on the base, and the base is used for detachable connection with the main device.

[0011] Further, a brush holder is installed on the base, and pushing the brush holder drives the base, the carbon brush body and the constant force elastic member to slide relative to the main device as a whole.

[0012] Further, the electrical control circuit includes a first wire and a second wire respectively connected to both sides of the carbon brush body, and further includes a sliding rheostat and a third wire. One end of the third wire is connected to the constant force elastic member, and the other end is connected to the sliding rheostat.

[0013] Further, an ammeter is also connected in series in the electrical control circuit.

[0014] Further, a fixed collar is slidably sleeved outside the carbon brush, and the fixed collar is fixedly connected to the base.

[0015] Further, the constant force elastic member includes an anchoring section and a force - applying coil section. The force - applying coil section abuts against the tail end of the carbon brush body, and the anchoring section is connected to the fixed collar.

[0016] Further, a slot channel is provided in the fixed collar, the anchoring section is inserted into the slot channel, and an elastic shrinkage head is provided at the free end of the anchoring section;

[0017] When the anchoring section is fixedly connected to the fixed collar, the elastic shrinkage head abuts tightly against the end face of the fixed collar.

[0018] The utility model can achieve the following beneficial effects:

[0019] 1. By collecting the real - time parameters of the carbon brush, the utility model can quickly feedback the carbon brush state to the display lamp, which is convenient for the inspection personnel to judge whether the carbon brush needs to be replaced; compared with using a sensor to judge the carbon brush consumption situation, judging the carbon brush consumption situation by the change amount of the constant force elastic member can reduce error factors such as interference of the strong magnetic field environment on the sensor.

[0020] 2. Through the settings of the fixed collar, the base and the brush holder, the carbon brush body is more convenient to disassemble and install, and the replacement of the carbon brush body can be realized more quickly and conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The following combines the drawings and embodiments to further illustrate the utility model:

[0022] Figure 1 It is the overall cross - sectional schematic diagram of the real - time monitoring system of the carbon brush of the utility model;

[0023] Figure 2 This is the circuit diagram of the electrical control circuit of the present utility model.

[0024] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0025] 1. Carbon brush body; 2. Constant force elastic member; 21. Anchoring section; 211. Elastic contraction head; 22. Force application coil section; 3. Display lamp; 4. Electrical control circuit; 41. First wire; 42. Second wire; 43. Third wire; 44. Slide rheostat; 45. Ammeter; 5. Base; 6. Brush holder; 7. Fixed collar; 71. Card slot channel. Detailed implementation manners

[0026] To facilitate the understanding of this application, the following will describe this application more comprehensively with reference to the relevant attached drawings. Embodiments of this application are shown in the attached drawings. However, this application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of this application more thorough and comprehensive.

[0027] As Figure 1 and Figure 2 shown, a real-time monitoring system for carbon brushes includes a base 5, the base 5 is detachably installed on the main device, a brush holder 6 is fixed on the side wall of the base 5, a fixed collar 7 is fixed on the bottom wall of the base 5, and a carbon brush body 1 is slidably inserted into the fixed collar 7. The provision of the brush holder 6 facilitates the staff to control the base 5 so as to remove the base 5 from the main device; the carbon brush body 1 is slidably inserted into the fixed collar 7. On the one hand, it can limit the movement path of the carbon brush body 1 and increase the stability of the carbon brush body 1. On the other hand, it is convenient to disassemble and replace the carbon brush body 1.

[0028] The head of the carbon brush body 1 is used to press against the rotating shaft, and a constant force elastic member 2 is provided at the tail of the carbon brush body 1. The constant force elastic member 2 is fixed on the fixed collar 7, and the constant force elastic member 2 continuously gives the carbon brush body 1 a thrust force in the direction of the rotating shaft. The constant force elastic member 2 includes an anchoring section 21 and a force application coil section 22. The anchoring section 21 is linear, the force application coil section 22 is circular, and the force application coil section 22 abuts against the tail end of the constant force elastic member 2. The anchoring section 21 has a tendency to bend, and thus continuously exerts a thrust force on the carbon brush body 1.

[0029] Specifically, a card slot channel 71 is provided inside the fixed collar 7. The free end of the anchoring section 21 is inserted and passes through the card slot channel 71. An elastic shrinkage head 211 is provided at the free end of the anchoring section 21. The elastic shrinkage head 211 is conical. When the anchoring section 21 is inserted into the card slot channel 71, the diameter of the elastic shrinkage head 211 can shrink and pass through the card slot channel 71. After the elastic shrinkage head 211 passes through the card slot channel 71, the elastic shrinkage head 211 resumes its original shape under the action of the elastic restoring force. At this time, the end face of the elastic shrinkage head 211 abuts against the end face of the card slot channel 71. Thus, when the constant force elastic member 2 applies a thrust to the carbon brush body 1, the constant force elastic member 2 can maintain a stable connection with the fixed collar 7.

[0030] When the constant force elastic member 2 needs to be replaced, only need to continue to push the constant force elastic member 2 forward, so that the anchoring section 21 all passes through the card slot channel 71. Then, under the limitation of the card slot channel 71, the force application loop section 22 changes from the bent state to a straight state and passes through the card slot channel 71, and the constant force elastic member 2 can be withdrawn from the fixed collar 7. The installation and disassembly are both relatively convenient.

[0031] A display lamp 3 and an electrical control circuit 4 are further provided at the end of the carbon brush body 1. The display lamp 3, the carbon brush body 1, and the constant force elastic member 2 are all electrically connected to the electrical control circuit 4. Through the electrical control circuit 4, the real-time state of the carbon brush body 1 can be displayed through the display lamp 3.

[0032] The electrical control circuit 4 includes a first wire 41 and a second wire 42. The first wire 41 and the second wire 42 are respectively connected to both sides of the carbon brush body 1. At the same time, an ammeter 45 is also connected in series in this circuit. When the voltage or current exceeds the upper limit of the threshold resistance, the display lamp 3 will display different signals according to the set parameters to remind the staff of the working state of the carbon brush body 1.

[0033] In addition, the electrical control circuit 4 further includes a third wire 43 and a sliding rheostat 44. One end of the third wire 43 is connected to the constant force elastic member 2, and the other end is connected to the sliding rheostat 44. The constant force elastic member 2 always gives a forward force to the fixed carbon brush body 1 to keep the carbon brush body 1 and the rotating shaft in close fit, ensuring that the excitation current can be transmitted to the rotor main shaft through the carbon brush body 1. A deformation point is taken on the constant force elastic member 2 and connected to the sliding rheostat 44 in the electrical control circuit 4. The carbon brush body 1 will gradually shorten due to consumption during contact with the rotating shaft. The constant force elastic member 2 presses it tightly against the rotating shaft. The change of the constant force elastic member 2 will be converted into an electrical signal through the sliding rheostat 44 and displayed through the display lamp 3 to represent the working state of the carbon brush body 1.

[0034] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A carbon brush real-time monitoring system, characterized in that: It comprises a carbon brush body (1), the end of the carbon brush body (1) is provided with a constant force elastic member (2), the constant force elastic member (2) continuously applies thrust to the carbon brush body (1), and the end of the carbon brush body (1) is connected to a display light (3); It also comprises an electrical control circuit (4), and the carbon brush body (1), the constant force elastic member (2) and the display light (3) are all connected to the electrical control circuit (4).

2. A carbon brush real-time monitoring system according to claim 1, characterized in that: It also comprises a base (5), the carbon brush body (1) and the display light (3) are both mounted on the base (5), and the base (5) is used for being detachably connected to a main device.

3. A carbon brush real-time monitoring system according to claim 2, characterized in that: A brush holder (6) is mounted on the base (5), and pushing the brush holder (6) drives the base (5), the carbon brush body (1) and the constant force elastic member (2) to slide as a whole relative to the main device.

4. A carbon brush real-time monitoring system according to claim 1, characterized in that: The electrical control circuit (4) comprises a first wire (41) and a second wire (42) respectively connected to two sides of the carbon brush body (1), and also comprises a sliding rheostat (44) and a third wire (43); one end of the third wire (43) is connected to the constant force elastic member (2), and the other end is communicated with the sliding rheostat (44).

5. A carbon brush real-time monitoring system according to claim 1, characterized in that: An ammeter (45) is also arranged in series in the electrical control circuit (4).

6. A carbon brush real-time monitoring system according to claim 2, characterized in that: A fixing collar (7) is slidably sleeved on the outside of the carbon brush body (1), and the fixing collar (7) is fixedly connected to the base (5).

7. A carbon brush real-time monitoring system according to claim 6, characterized in that: The constant force elastic member (2) comprises an anchoring section (21) and a force application ring section (22), the force application ring section (22) abuts against the rear end of the carbon brush body (1), and the anchoring section (21) is connected to the fixing ring (7).

8. A carbon brush real-time monitoring system according to claim 7, characterized in that: A slot channel (71) is provided in the fixing collar (7), the anchoring section (21) is inserted into the slot channel (71), and a resilient shrink head (211) is provided at the free end of the anchoring section (21); When the anchoring section (21) is connected and fixed to the fixing collar (7), the elastic shrinking head (211) is tightly pressed against the end surface of the fixing collar (7).

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