Generator carbon brush temperature and length automatic monitoring device

Abstract

The invention relates to the field of generator carbon brush monitoring, in particular to a generator carbon brush temperature and length automatic monitoring device which comprises an annular bottom plate, a driving motor, a measuring unit and a controller. The annular bottom plate is arranged outside the generator large shaft in a sleeving mode, a guide rail is arranged on the annular bottom plate, and the controller controls the driving motor to move along the guide rail. The measuring unit moves along with the driving motor and is used for measuring the length and the temperature of the carbon brush of the generator and sending the measured length value and the measured temperature value to the controller; the controller judges whether the received length value and the received temperature value reach corresponding early warning values or not, and if yes, an early warning signal is generated and early warning is carried out; the device can automatically inspect the carbon brushes of the generator, automatically measure the temperature and the length of each carbon brush, and perform early warning when the temperature of the carbon brushes is too high or the length of the carbon brushes is too short, thereby preventing the normal operation of the generator from being affected by the too high temperature of the carbon brushes or the too short length of the carbon brushes.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of generator carbon brush monitoring, in particular to a kind of generator carbon brush temperature and length automatic monitoring device. BACKGROUND

[0002] The present application relates to the field of generator carbon brush monitoring, in particular to a kind of generator carbon brush temperature and length automatic monitoring device.

[0003] At present, carbon brush measurement still adopts artificial way to measure regularly, however, artificial measurement method cannot accurately and timely find that the temperature of carbon brush is too high and the length of carbon brush is too short, which leads to abnormal operation of generator. SUMMARY

[0004] To solve the problem that the existing carbon brush measurement method cannot detect the length and temperature of carbon brush in time, a kind of generator carbon brush temperature and length automatic monitoring device is provided.

[0005] A kind of generator carbon brush temperature and length automatic monitoring device, comprising: annular bottom plate, drive motor, measurement unit and controller.

[0006] The annular bottom plate is arranged outside the large shaft of generator, and guide rail is arranged on the annular bottom plate, and the controller controls the drive motor to move along the guide rail; the measurement unit moves with the drive motor, and the measurement unit is used to measure the length and temperature of generator carbon brush and send the measured length value and temperature value to the controller.

[0007] The controller judges whether the received length value and temperature value reach corresponding early warning value, and if yes, early warning signal is generated and early warning is carried out.

[0008] The present application has the following beneficial effects:

[0009] The present application provides a kind of generator carbon brush temperature and length automatic monitoring device, which comprises annular bottom plate arranged outside the large shaft of generator, drive motor moves on the surface of annular bottom plate, measurement unit moves with drive motor, measures the length and temperature of generator carbon brush, and controller judges whether early warning is needed according to the measured length and temperature value;The device can automatically inspect generator carbon brush by setting, automatically measure the temperature and length of each carbon brush, and early warning is carried out when the temperature of carbon brush is too high or the length of carbon brush is too short, to avoid that the temperature of carbon brush is too high or the length of carbon brush is too short to affect normal operation of generator. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1A schematic diagram of the annular base plate structure of an automatic monitoring device for generator carbon brush temperature and length according to a specific embodiment of this application;

[0011] In the diagram, 1 is the annular base plate, 2 is the bolt hole, 3 is the measuring hole group, 4 is the outer retaining ring of the cable chain, 5 is the inner retaining ring of the cable chain, 6 is the guide rail, 7 is the gear ring, 8 is the drive motor, 9 is the generator shaft hole, 10 is the shelf, and 11 is the mounting hole. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. Here, the illustrative embodiments and descriptions of this invention are used to explain the invention, but are not intended to limit the invention.

[0013] An automatic monitoring device for the temperature and length of a generator carbon brush includes: an annular base plate 1, a drive motor 8, a measuring unit, and a controller;

[0014] The annular base plate 1 is sleeved on the outside of the generator shaft. A guide rail 6 is provided on the annular base plate 1. The controller controls the drive motor 8 to move along the guide rail 6. The measuring unit moves with the drive motor 8. The measuring unit is used to measure the length and temperature of the generator carbon brush and send the measured length and temperature values ​​to the controller.

[0015] The controller determines whether the received length and temperature values ​​have reached the corresponding warning values. If so, it generates a warning signal and issues a warning.

[0016] Specifically, refer to Figure 1 The generator shaft passes through the generator shaft hole 9 of the annular base plate 1. The inner ring diameter of the annular base plate 1 is larger than the diameter of the generator shaft. The drive motor 8 moves on the surface of the annular base plate 1, which is sleeved outside the generator shaft. The measuring unit moves with the drive motor 8. The measuring unit measures the length and temperature of the generator carbon brush. The controller determines whether an early warning is needed based on the measured length and temperature values.

[0017] Furthermore, the upper surface of the annular base plate 1 is provided with guide rails 6, multiple sets of measuring holes and multiple bolt holes in sequence from the inner ring to the outer ring;

[0018] A gear ring 7 is provided on the inner side of the guide rail 6. The gear of the drive motor 8 meshes with the gear ring 7, and the controller controls the drive motor 8 to move along the guide rail 6.

[0019] Multiple sets of measuring holes are evenly arranged along the circumferential direction of the annular base plate 1. The measuring unit and the generator carbon brush are located on both sides of the annular base plate 1, respectively. The measuring signal emitted by the measuring unit is transmitted through the measuring hole set to measure the length and temperature of the generator carbon brush.

[0020] Multiple bolt holes 2 are evenly arranged along the circumferential direction of the annular base plate 1. The bolt holes 2 are used to fix the annular base plate 1 to the carbon brush holder, so that the annular base plate 1 is fitted onto the outside of the generator shaft.

[0021] Specifically, the annular base plate 1 is used to arrange the components and is fixed to the carbon brush holder fixing bolts through the bolt holes 2; the guide rail 6 and the gear ring 7 constrain the drive motor 8 to move on the guide rail 6; the guide rail 6 can be set to a circle or an arc shape according to the specific situation of the generator and carbon brush.

[0022] Furthermore, an automatic monitoring device for generator carbon brush temperature and length also includes a shelf 10, which is fixedly connected to the drive motor 8. The shelf 10 is provided with mounting holes 11, and the measuring unit is installed and connected to the shelf 10 through the mounting holes 11.

[0023] Furthermore, the measuring unit includes a positioning element, a length element, and a temperature element, and the controller includes a counting unit. Each group of measuring holes 3 includes a temperature measuring hole, a length measuring hole, and a positioning hole.

[0024] When the drive motor 8 moves in the set positive direction, the count unit value of the positioning hole controller increases by 1 each time it passes through a positioning hole until it reaches the set end positioning hole, after which the drive motor 8 moves in the set reverse direction; when the drive motor 8 moves in the set reverse direction, the count unit value of the positioning hole controller decreases by 1 each time it passes through a positioning hole until it reaches the set start positioning hole, after which the drive motor 8 moves in the set positive direction.

[0025] When the drive motor 8 passes through a positioning hole, the positioning element generates a positioning signal and sends the positioning signal to the controller. The controller controls the drive motor 8 to stop moving based on the received positioning signal. The length element measures the length of the carbon brush based on the received length measurement signal and sends the measured length value to the controller. The temperature element measures the temperature of the carbon brush based on the received temperature measurement signal and sends the measured temperature value to the controller.

[0026] Specifically, the annular base plate 1 is fitted outside the generator shaft, and the carbon brushes and drive motor 8 are respectively located on both sides of the annular base plate 1. The positions of the carbon brush head and tail are set according to the installation distribution of the generator carbon brushes. When the automatic monitoring device of the present invention is turned on, the drive motor 8 automatically initializes and positions itself at the carbon brush head position. The direction from the carbon brush head position to the carbon brush tail position is set as the positive direction, and the direction from the carbon brush tail position to the carbon brush head position is set as the negative direction. The gear of the drive motor 8 meshes with the gear ring 7. After the drive motor 8 starts, it moves along the positive direction on the guide rail 6, and the measuring unit moves with the drive motor 8. The initial value of the controller counting unit is 0. Through the setting of the positioner, the positioner can identify the positioning hole. Whenever the drive motor 8 passes through a positioning hole, the positioner generates a positioning signal and sends the positioning signal to the controller. The value of the controller counting unit increases by 1. The controller also controls the drive motor 8 to stop according to the positioning signal. The length element generates a length measurement signal, and the temperature element generates a temperature measurement signal. The length measurement signal and the temperature measurement signal are sent to the controller respectively. The length element transmits a length detection signal based on the received length measurement signal. The length detection signal passes through the length measurement hole to measure the length of the carbon brush and sends the measured length value to the controller.

[0027] A length marking hole is set at the tail of the carbon brush. When measuring the carbon brush length, the length detection signal emitted by the length element passes through the length measurement hole, is reflected by the carbon brush, and returns to the length element. At this time, it means that the carbon brush length is qualified and does not need to be replaced. The length element sends the measured length value to the controller. As the carbon brush wears out, the length marking hole at the tail of the carbon brush is pushed out by the carbon brush holder. When the length detection signal emitted by the length element passes through the length measurement hole and then through the length marking hole, and no signal returns to the length element, it means that the carbon brush length is unqualified and needs to be replaced.

[0028] The temperature element transmits a temperature detection signal based on the received temperature measurement signal. The temperature detection signal passes through the temperature measurement hole to measure the carbon brush temperature and sends the measured temperature value to the controller.

[0029] After the automatic monitoring device passes through a positioning hole, the controller receives the value sent by the counter, the length value sent by the length element, and the temperature value sent by the temperature element, and the counter value corresponds to the positioning hole; therefore, repeating the above process can realize the monitoring of the temperature and length of the generator carbon brush.

[0030] After the drive motor 8 reaches the positioning hole at the end of the carbon brush and completes the measurement of the carbon brush length and temperature, the drive motor 8 moves in the opposite direction on the guide rail 6 and repeats the above process to realize the inspection of the generator carbon brush.

[0031] By setting up an automatic monitoring device for the temperature and length of the generator carbon brushes, each carbon brush is tested for 3 seconds, and the temperature and length of each carbon brush are automatically measured.

[0032] Furthermore, on the upper surface of the annular base plate 1, an inner retaining ring 5 of the drag chain is provided near the inner ring side of the measuring hole group, and an outer retaining ring 4 of the drag chain is provided near the outer ring side of the measuring hole group; the generator cable drag chain moves within the gap between the inner retaining ring 5 and the outer retaining ring 4.

[0033] Furthermore, the length element is a photoelectric switch, and the temperature element is an infrared temperature measuring device.

[0034] Furthermore, an automatic monitoring device for generator carbon brush temperature and length also includes a mobile terminal;

[0035] The mobile terminal is used to receive counter values, length values, temperature values ​​and warning signals sent by the controller, and to issue warnings based on the received warning signals.

[0036] Specifically, the temperature and length of each carbon brush can be displayed via a mobile terminal, and an alarm can be triggered if the limit is exceeded. Cloud monitoring is also possible, with the mobile app displaying the monitoring values ​​in real time. When a temperature or length alarm is triggered, the mobile phone automatically receives the alarm information, allowing users to monitor the operating status of the carbon brushes in real time.

[0037] Furthermore, the controller is a PLC controller.

[0038] Specifically, data can be uploaded to a local touchscreen or central control room via a PLC controller for centralized monitoring, with warning values ​​set and audible and visual alarms triggered when limits are exceeded. Alternatively, data and alarm information received by the controller can be transmitted to a mobile app via 4G cloud mode, allowing for monitoring anytime, anywhere, making it more convenient to use.

[0039] The system can locate and encode each carbon brush, display the number and monitoring value of each carbon brush, and accurately identify the specific alarm carbon brush number when a fault occurs, facilitating quick fault finding and handling.

[0040] While the invention has been described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the invention. Therefore, it should be understood that many modifications can be made to the exemplary embodiments, and other arrangements can be designed without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that different dependent claims and features described herein can be combined in ways different from those described in the original claims. It is also understood that features described in conjunction with individual embodiments can be used in other described embodiments.

Claims

1. An automatic monitoring device for the temperature and length of generator carbon brushes, characterized in that, include: Circular base plate, drive motor, measuring unit, and controller; The annular base plate is fitted onto the outside of the generator shaft. A guide rail is provided on the annular base plate. The controller controls the drive motor to move along the guide rail. The measuring unit moves with the drive motor. The measuring unit is used to measure the length and temperature of the generator carbon brush and sends the measured length and temperature values ​​to the controller. The controller determines whether the received length and temperature values ​​have reached the corresponding warning values. If so, it generates a warning signal and issues a warning.

2. The generator carbon brush temperature and length automatic monitoring device according to claim 1, characterized in that: The upper surface of the annular base plate is provided with guide rails, multiple sets of measuring holes and multiple bolt holes in sequence from the inner ring to the outer ring. A gear ring is provided on the inner side of the guide rail. The gear of the drive motor meshes with the gear ring, and the controller controls the drive motor to move along the guide rail. Multiple sets of measuring holes are evenly arranged along the circumferential direction of the annular base plate. The measuring unit and the generator carbon brush are located on both sides of the annular base plate. The measuring signal emitted by the measuring unit is transmitted through the measuring hole set to measure the length and temperature of the generator carbon brush. Multiple bolt holes are evenly arranged along the circumferential direction of the annular base plate. The bolt holes are used to fix the annular base plate to the carbon brush holder, so that the annular base plate is fitted onto the outside of the generator shaft.

3. The generator carbon brush temperature and length automatic monitoring device according to claim 1, characterized in that: It also includes a shelf, which is fixedly connected to the drive motor. The shelf has mounting holes, through which the measuring unit is installed and connected to the shelf.

4. The generator carbon brush temperature and length automatic monitoring device according to claim 2, characterized in that: The measuring unit includes a positioning element, a length element, and a temperature element; the controller includes a counting unit; each group of measuring holes includes a temperature measuring hole, a length measuring hole, and a positioning hole. When the drive motor moves in the set positive direction, the count unit value of the positioning hole controller increases by 1 each time it passes through a positioning hole until it reaches the set end positioning hole, after which the drive motor moves in the set negative direction; when the drive motor moves in the set negative direction, the count unit value of the positioning hole controller decreases by 1 each time it passes through a positioning hole until it reaches the set start positioning hole, after which the drive motor moves in the set positive direction. When the drive motor passes through a positioning hole, the positioning element generates a positioning signal and sends the positioning signal to the controller. The controller controls the drive motor to stop moving based on the received positioning signal. The length element measures the length of the carbon brush and sends the measured length signal to the controller. The temperature element measures the carbon brush temperature and sends the measured temperature value to the controller.

5. The generator carbon brush temperature and length automatic monitoring device according to claim 2, characterized in that: On the upper surface of the annular base plate, an inner retaining ring of the drag chain is provided near the inner ring of the measuring hole group, and an outer retaining ring of the drag chain is provided near the outer ring of the annular base plate; the generator cable drag chain moves within the gap between the inner and outer retaining rings of the drag chain.

6. The generator carbon brush temperature and length automatic monitoring device according to claim 4, characterized in that: The length element is a photoelectric switch, and the temperature element is an infrared temperature measuring device.

7. The generator carbon brush temperature and length automatic monitoring device according to claim 1, characterized in that: It also includes mobile terminals; The mobile terminal is used to receive counter values, length values, temperature values ​​and warning signals sent by the controller, and to issue warnings based on the received warning signals.

8. The generator carbon brush temperature and length automatic monitoring device according to claim 1, characterized in that: The controller is a PLC controller.

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