Wear monitoring method for friction plate of fan coupler

Abstract

The invention discloses an abrasion monitoring method for a fan coupler friction plate, and relates to the field of mechanical equipment fault monitoring, and the method comprises the steps: simulating the abrasion condition of the friction plate on a test bench, and obtaining the conductivity change condition of the friction plate; based on the abrasion condition and the conductivity change condition of the friction plate, a conductivity-abrasion loss relation curve of the friction plate is established; the actual conductivity change condition of the friction plate is obtained under the actual working condition; acquiring the real-time abrasion condition of the friction plate based on the conductivity-abrasion loss relation curve of the friction plate; calculating the residual service life of the friction plate based on the real-time wear condition of the friction plate; and when the friction plate is abraded to the abrasion threshold value, an alarm is triggered, and shutdown replacement is carried out. During application, the conductivity of the fan coupler friction plate is monitored in real time, and the abrasion loss of the fan coupler friction plate is monitored according to the pre-acquired conductivity-abrasion loss relation curve, so that operation and maintenance personnel can know the use condition of the fan coupler friction plate in real time.

Description

Technical Field

[0001] The present invention relates to the field of mechanical equipment fault monitoring, and specifically to a method for monitoring the wear of the friction disc of a fan coupling. Background Art

[0002] In the prior art, there is no good method for monitoring the wear of the friction disc inside the fan coupling. Usually, it is necessary to regularly disassemble the coupling to detect the wear of the friction disc, or disassemble the coupling to check the friction disc when problems occur during operation. This method is time-consuming and laborious, and multiple disassembly operations are likely to cause damage to the coupling or other components, resulting in reduced accuracy and affecting the operation of the fan. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies existing in the prior art and provide a method for monitoring the wear of the friction disc of a fan coupling.

[0004] The purpose of the present invention is mainly achieved through the following technical solutions: A method for monitoring the wear of the friction disc of a fan coupling includes the following steps: Simulate the wear of the friction disc on a test bench and obtain the change in the conductivity of the friction disc; Based on the wear condition and the change in conductivity of the friction disc, establish a conductivity-wear amount relationship curve for the friction disc; Obtain the actual change in conductivity of the friction disc under actual working conditions; Based on the conductivity-wear amount relationship curve of the friction disc, obtain the real-time wear condition of the friction disc; Based on the real-time wear condition of the friction disc, calculate the remaining service life of the friction disc; When the friction disc wears to the wear threshold, trigger an alarm and stop the machine for replacement.

[0005] When this application is implemented, in actual working conditions, the friction disc of the fan coupling will wear as the working time increases, and the wear degree of the friction disc has an important impact on the operation safety and operation efficiency of the fan. In the prior art, the wear monitoring of the friction disc is mostly evaluated by the temperature during the operation of the friction disc. However, the operation of the friction disc is affected by various factors, such as seasonal changes and weather changes, which makes it complicated to evaluate the wear degree of the friction disc through temperature and difficult to accurately monitor. And by regularly disassembling the coupling to detect the wear of the friction disc, or disassembling the coupling to check the friction disc when problems occur during operation, this method is time-consuming and laborious, and multiple disassembly operations are likely to cause damage to the coupling or other components, resulting in reduced accuracy and affecting the operation of the fan.

[0006] To this end, the present application proposes a method for monitoring the wear of the friction plate of a fan coupling. In the present application, the wear condition of the friction plate is monitored by monitoring the conductivity of the friction plate. First, before monitoring the wear condition of the friction plate, it is necessary to calibrate the change in conductivity and the change in wear amount of the friction plate. To this end, in the present application, the wear condition of the friction plate during operation is simulated on a test bench, and the conductivity of the friction plate at different wear amounts is obtained at the same time, so as to obtain the change in conductivity of the friction plate, and a conductivity-wear amount relationship curve of the friction plate is established according to the wear condition and the change in conductivity of the friction plate for monitoring and comparison of the friction plate under actual working conditions. When the friction plate is actually working, the conductivity of the friction plate is monitored in real time, and the real-time wear amount of the friction plate is obtained according to the conductivity-wear amount relationship curve, so as to realize the wear monitoring of the friction plate, and an alarm signal is triggered when the friction plate wears to the wear threshold to remind the operation and maintenance personnel to stop the machine and replace it. In addition, according to the wear amount of the friction plate, the remaining life of the friction plate can also be predicted, so that the operation and maintenance personnel can better understand the use of the friction plate of the fan coupling.

[0007] In a possible implementation manner, the wear condition of the friction plate is simulated on a test bench, and the change in conductivity of the friction plate is obtained. Specifically: The initial conductivity and initial mass of the friction plate are obtained, the actual working condition of the friction plate is simulated by a friction and wear testing machine, a time interval is set, the detection of the conductivity and wear amount of the friction plate is paused in stages, and the conductivity and wear amount of the friction plate at each stage are recorded; Wait until the friction plate wears to the wear threshold and stop the test.

[0008] In a possible implementation manner, a conductivity-wear amount relationship curve of the friction plate is established based on the wear condition and the change in conductivity of the friction plate. Specifically: A conductivity-wear amount relationship curve is established based on the initial conductivity, initial mass, conductivity and wear amount of the friction plate at each stage; Repeat multiple groups of tests, obtain multiple groups of conductivity-wear amount relationship curves, and fit the multiple groups of conductivity-wear amount relationship curves to obtain the final conductivity-wear amount relationship curve.

[0009] In a possible implementation manner, the actual change in conductivity of the friction plate is obtained under actual working conditions. Specifically: A data transmission platform is established based on RFID and a conductivity sensor; The conductivity sensor obtains the real-time conductivity of the friction plate and transmits it to the edge server based on RFID; At the edge server, a curve of the change in conductivity over time is drawn based on the real-time conductivity of the friction plate.

[0010] In a possible implementation, a data transmission platform is established based on RFID and conductivity sensors, specifically as follows: Embed the conductivity sensor into the UHF RFID tag and embed the conductivity sensor on the surface of the friction plate; Install a fixed reader in the fan nacelle; The fixed reader establishes communication with the edge server through RS-485 or WiFi.

[0011] In a possible implementation, a thermocouple is built into the conductivity sensor to compensate for the temperature drift of the conductivity.

[0012] In a possible implementation, based on the real-time wear condition of the friction plate, calculate the remaining service life of the friction plate, specifically as follows: Obtain the maximum allowable wear amount of the friction plate; Based on the real-time wear condition of the friction plate, obtain the current wear amount and current wear rate of the friction plate; Calculate the remaining service life of the friction plate based on the maximum allowable wear amount, current wear amount and current wear rate of the friction plate.

[0013] In a possible implementation, the wear threshold is 10% of the initial mass of the friction plate.

[0014] In summary, compared with the prior art, the present invention has the following beneficial effects: By real-time monitoring the conductivity of the fan coupling friction plate and according to the pre-obtained conductivity-wear amount relationship curve to real-time monitor the change of the wear amount of the fan coupling friction plate, the operation and maintenance personnel can understand the usage situation of the fan coupling friction plate in real time, reducing the manual inspection cost and the risk of misjudgment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, form a part of this application, and do not constitute a limitation to the embodiments of the present invention. In the drawings: Figure 1 It is a flowchart of an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] To make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below in conjunction with the embodiments and the drawings. The illustrative embodiments and descriptions thereof of the present invention are only used to explain the present invention and do not constitute a limitation to the present invention.

[0017] Embodiment: As Figure 1 shown, a method for monitoring the wear of a fan coupling friction plate includes the following steps: S1: Simulate the wear condition of the friction plate on the test bench and obtain the change in the conductivity of the friction plate. S2: Based on the wear condition and the change in conductivity of the friction plate, establish a conductivity-wear amount relationship curve for the friction plate. S3: Obtain the actual change in the conductivity of the friction plate under actual working conditions. S4: Based on the conductivity-wear amount relationship curve of the friction plate, obtain the real-time wear condition of the friction plate. S5: Calculate the remaining service life of the friction plate based on the real-time wear condition of the friction plate. S6: When the friction plate wears to the wear threshold, trigger an alarm and stop the machine for replacement.

[0018] When this application is implemented, in actual working conditions, the friction plate of the fan coupling will wear as the working time increases, and the degree of wear of the friction plate has an important impact on the operation safety and operation efficiency of the fan. In the prior art, the wear monitoring of the friction plate is mostly evaluated by the temperature when the friction plate is working. However, the work of the friction plate is affected by various factors, such as seasonal changes and weather changes, which makes it complicated to evaluate the wear degree of the friction plate through temperature and difficult to accurately monitor. By regularly disassembling the coupling to detect the wear condition of the friction plate, or disassembling the coupling to check the friction plate when problems occur during operation, this method is time-consuming and laborious, and multiple disassembly operations are likely to cause damage to the coupling or other components, resulting in reduced accuracy and affecting the operation of the fan.

[0019] Therefore, this application proposes a wear monitoring method for the friction plate of the fan coupling. In this application, the wear condition of the friction plate is monitored by monitoring the conductivity of the friction plate. First, before monitoring the wear condition of the friction plate, it is necessary to calibrate the change in the conductivity of the friction plate and the change in the wear amount. For this reason, in this application, the wear condition when the friction plate is working is simulated on the test bench, and at the same time, the conductivity of the friction plate under different wear amounts is obtained, so as to obtain the change in the conductivity of the friction plate, and a conductivity-wear amount relationship curve for the friction plate is established based on the wear condition and the change in conductivity of the friction plate for monitoring and comparison when the friction plate is under actual working conditions. When the friction plate is actually working, the conductivity of the friction plate is monitored in real time, and the real-time wear amount of the friction plate is obtained according to the conductivity-wear amount relationship curve to realize the wear monitoring of the friction plate, and an alarm signal is triggered when the friction plate wears to the wear threshold to remind the operation and maintenance personnel to stop the machine for replacement. In addition, according to the wear amount of the friction plate, the remaining life of the friction plate can also be predicted, so that the operation and maintenance personnel can better understand the usage situation of the friction plate of the fan coupling.

[0020] In a possible implementation, the wear condition of the friction plate is simulated on a test bench, and the change in the conductivity of the friction plate is obtained. Specifically: S11: Obtain the initial conductivity and initial mass of the friction plate; S12: Use a friction and wear testing machine to simulate the actual working conditions of the friction plate, set a time interval, pause at intervals to detect the conductivity and wear amount of the friction plate, and record the conductivity and wear amount of the friction plate at each stage; S13: Stop the test when the friction plate wears to the wear threshold.

[0021] In this application, in order to obtain the wear condition and conductivity change of the friction plate, first, the initial mass and initial conductivity of the friction plate need to be obtained to calculate the wear amount based on the initial mass and the mass after wear of the friction plate, and obtain the change in conductivity based on the initial conductivity and the conductivity during testing of the friction plate. When using a friction and wear testing machine to simulate the actual working conditions of the friction plate, control the load, rotation speed, temperature, and lubrication conditions according to the actual working conditions, set the interval time for each record to stop and record the conductivity and wear amount. When the friction plate is about to wear to the wear threshold, conduct the last stage of wear test, record the remaining mass of the friction plate after completion, and calculate the total wear amount of the friction plate based on the initial mass of the friction plate.

[0022] In a possible implementation, based on the wear condition and conductivity change of the friction plate, a conductivity-wear amount relationship curve of the friction plate is established. Specifically: S21: Establish a conductivity-wear amount relationship curve based on the initial conductivity, initial mass, conductivity, and wear amount of the friction plate at each stage; S22: Repeat multiple groups of tests, obtain multiple groups of conductivity-wear amount relationship curves, and fit the multiple groups of conductivity-wear amount relationship curves to obtain the final conductivity-wear amount relationship curve.

[0023] In this application, in order to make the obtained conductivity-wear amount relationship curve of the friction plate more accurate, in this application, multiple groups of conductivity-wear amount relationship curves of the friction plate are obtained through multiple tests, and the multiple groups of conductivity-wear amount relationship curves are fitted to obtain a more accurate conductivity-wear amount relationship curve.

[0024] In a possible implementation, the actual conductivity change of the friction plate is obtained under actual working conditions. Specifically: S31: Establish a data transmission platform based on RFID and conductivity sensors; S32: The conductivity sensor obtains the real-time conductivity of the friction plate and transmits it to the edge server based on RFID; S33: At the edge server, draw a curve of the change of conductivity over time based on the real-time conductivity of the friction plate.

[0025] In this application, to obtain the change of the conductivity of the friction plate under actual working conditions, a conductivity sensor is used to collect the conductivity of the friction plate, and the collected data is transmitted through RFID. Through RFID technology, the change of the conductivity data of the friction plate can be collected in real time, reflecting its wear state, avoiding the lag of traditional regular inspections, triggering maintenance in advance, reducing sudden shutdowns, and the RFID wireless transmission does not require physical contact, which is suitable for the environment of high-speed rotating couplings, avoiding problems such as difficult wiring or slip ring wear, and its automatic data collection can reduce the cost of manual inspections and the risk of misjudgment.

[0026] In a possible implementation, a data transmission platform is established based on RFID and a conductivity sensor. Specifically: S311: Embed the conductivity sensor into the UHF RFID tag and embed the conductivity sensor on the surface of the friction plate; S312: Install a fixed reader in the fan nacelle; S313: The fixed reader establishes communication with the edge server through RS-485 or WiFi.

[0027] In a possible implementation, a thermocouple is built into the conductivity sensor to compensate for the temperature drift of the conductivity.

[0028] In this application, since the temperature of the friction plate changes during operation, and the temperature affects the conductivity of the friction plate, a thermocouple is built into the conductivity sensor to compensate for the temperature drift of the conductivity.

[0029] In a possible implementation, based on the real-time wear condition of the friction plate, calculate the remaining service life of the friction plate. Specifically: S51: Obtain the maximum allowable wear amount of the friction plate; S52: Based on the real-time wear condition of the friction plate, obtain the current wear amount and the current wear rate of the friction plate; S53: Calculate the remaining service life of the friction plate based on the maximum allowable wear amount, the current wear amount and the current wear rate of the friction plate.

[0030] In this application, the current wear rate of the friction plate is obtained through the curve of the change of conductivity over time and the conductivity-wear amount relationship curve, that is, the curve of the change of conductivity over time is converted into the curve of the change of wear amount over time through the conductivity-wear amount relationship curve, and then the current wear rate of the friction plate can be obtained.

[0031] In a possible implementation, the wear threshold is 10% of the initial mass of the friction plate.

[0032] The specific embodiments described above further elaborate on the object, technical solution, and beneficial effects of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not used to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for monitoring the wear of the friction plate of a fan coupling, characterized in that, The following steps are involved: Simulate the wear of the friction plate on the test bench and obtain the change in the conductivity of the friction plate; Based on the wear condition and conductivity change of the friction plate, a conductivity-wear relationship curve of the friction plate is established; Obtain the actual conductivity change of the friction plate under actual working conditions; Based on the friction plate conductivity-wear relationship curve, the real-time wear condition of the friction plate is obtained; Calculate the remaining service life of the friction plate based on the real-time wear condition of the friction plate; When the friction pad is worn to the wear threshold, an alarm is triggered and the machine is shut down for replacement.

2. The wear monitoring method of a friction disc of a fan coupling according to claim 1, characterized in that, The wear of the friction plate is simulated on the test bench, and the change in the conductivity of the friction plate is obtained, specifically: Obtain the initial conductivity and initial mass of the friction plate, use a friction and wear tester to simulate the actual working conditions of the friction plate, set time intervals, pause in stages to detect the conductivity and wear of the friction plate, and record the conductivity and wear of the friction plate at each stage; When the friction plate is worn to the wear threshold, stop the test.

3. A wear monitoring method for a friction plate of a fan coupling according to claim 2, characterized in that, Based on the wear condition and conductivity change of the friction plate, the conductivity-wear relationship curve of the friction plate is established, specifically: A conductivity-wear amount relationship curve is established based on the initial conductivity, initial mass, conductivity and wear amount of the friction plate at each stage; Repeat multiple groups of tests to obtain multiple groups of conductivity-wear loss relationship curves, and fit multiple groups of conductivity-wear loss relationship curves to obtain the final conductivity-wear loss relationship curve.

4. A wear monitoring method for a friction plate of a fan coupling according to claim 1, characterized in that, The actual conductivity change of the friction plate is obtained under actual working conditions, specifically: Establish a data transmission platform based on RFID and conductivity sensors; The conductivity sensor obtains the real-time conductivity of the friction plate and transmits it to the edge server based on RFID; At the edge server, a conductivity change curve over time is drawn based on the real-time conductivity of the friction plate.

5. A method for monitoring the wear of the friction plate of a fan coupling according to claim 4, characterized in that, A data transmission platform is established based on RFID and conductivity sensors, specifically: The conductivity sensor is embedded in the UHF RFID tag, and the conductivity sensor is embedded in the surface of the friction plate; Install a fixed reader in the wind turbine cabin; The fixed reader communicates with the edge server via RS-485 or WiFi.

6. A method for monitoring wear of a friction plate of a fan coupling according to claim 4, characterized in that, The conductivity sensor has a built-in thermocouple to compensate for the temperature drift of the conductivity.

7. A wear monitoring method for a friction plate of a fan coupling according to claim 1, characterized in that, Based on the real-time wear of the friction plate, the remaining service life of the friction plate is calculated as follows: Obtain the maximum allowable wear of the friction plate; Based on the real-time wear condition of the friction plate, the current wear amount and current wear rate of the friction plate are obtained; The remaining service life of the friction lining is calculated based on the maximum allowable wear of the friction lining, the current wear and the current wear rate.

8. A method for monitoring wear of a friction plate of a fan coupling according to claim 1, characterized in that, The wear threshold is 10% of the initial mass of the friction plate.

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