Online monitoring and early warning device for lubrication wear state of bearing bush of pumped storage unit

Abstract

The utility model belongs to the field of on-line monitoring equipment, and particularly discloses a pumped storage unit bearing bush lubrication wear state on-line monitoring and early warning device which comprises an ultrasonic sensor arranged on the surface of a pumped storage unit bearing bush, fixedly connected with the bearing bush through a hoisting hole of the pumped storage unit bearing bush and used for collecting working data of a bearing bush oil film; the working data comprises data of the bearing bush oil film in an unstable working state and data of the bearing bush oil film in a stable working state; and the monitoring and early warning equipment is connected with the signal output end of the ultrasonic sensor through a signal transmission line and is used for monitoring the working data of the pumped storage unit, displaying the working data and carrying out early warning prompt. The running stability and the maintenance economy of the bearing bush can be improved.

Description

Technical Field

[0001] This application belongs to the field of on-line monitoring equipment, and more specifically, relates to an on-line monitoring and early warning device for the lubrication and wear state of the bearing bush of a pumped-storage unit. Background Art

[0002] The operating conditions of pumped-storage units are complex and change frequently. During the operation of different conditions, the bearing bush components bear large loads. Effective and stable lubrication is the key to ensuring the operation of the bearing bush. It can effectively separate the two metal friction surfaces, avoid direct contact between the two friction surfaces, and prevent mechanical wear on the surfaces of the friction pairs.

[0003] During the start-stop stage of the operation of pumped-storage units, the lubricating oil film of the bearing bush is often unstable. When the oil film is unstable, wear of the bearing bush lining often occurs. In recent years, on-line oil monitoring technology has been developed. Monitoring sensors usually adopt temperature measuring sensors and vibration measuring sensors. The temperature measuring sensor judges the lubrication performance by obtaining the friction temperature of the bearing bush. If the temperature is too high, it indicates that the lubrication effect is not good and wear of the bearing bush lining may occur. The vibration measuring sensor can judge the lubrication performance by the strength of the bearing bush vibration. If the vibration frequency increases significantly, it indicates that the lubrication performance is not good and wear of the bearing bush lining may occur.

[0004] However, the installation positions of the temperature measuring sensor and the vibration measuring sensor are usually inside key components of the unit, such as bearings, cooling system pipelines, and the structural supports of the unit. Therefore, it will cause problems such as inconvenient deployment, low installation efficiency, and low maintenance efficiency. Content of the Utility Model

[0005] Aiming at the defects of the prior art, the purpose of this application is to provide an on-line monitoring and early warning device for the lubrication and wear state of the bearing bush of a pumped-storage unit, aiming to solve the problems of inconvenient deployment, low installation efficiency, and low maintenance efficiency caused by the current sensors being set inside the unit.

[0006] To achieve the above purpose, this application provides an on-line monitoring and early warning device for the lubrication and wear state of the bearing bush of a pumped-storage unit, including:

[0007] An ultrasonic sensor, which is set on the surface of the bearing bush of the pumped-storage unit and is fixedly connected to the bearing bush through the hoisting hole of the pumped-storage unit bearing bush, and is used to collect the working data of the bearing bush oil film; the working data includes the data in the unstable working state and the stable working state of the bearing bush oil film;

[0008] A monitoring and early warning device, which is connected to the signal output end of the ultrasonic sensor through a signal transmission line, is used to monitor the working data of the pumped-storage unit, display the working data, and give an early warning prompt.

[0009] The ultrasonic sensor is deployed on the surface of the bearing bush, and there is no directional requirement for installation. Compared with traditional temperature and vibration sensors, the ultrasonic sensor has the advantages of convenient deployment, improved installation and maintenance efficiency, etc. The data processing and monitoring and warning unit is deployed on-site at the monitoring location, aggregating and processing the monitoring information of multiple sensors on-site, and simultaneously having core functions such as data acquisition, data processing, monitoring and warning, storage, and communication. The sensor senses ultrasonic pulses on the surface of the bearing bush and transmits the signals into the data processing and monitoring and warning unit through a signal transmission line for signal analysis. At the same time, the incoming data is stored and backed up, and the analysis results are presented in the form of charts on the display unit.

[0010] Optionally, the monitoring and warning device includes:

[0011] A data processing module, connected to the ultrasonic sensor through a signal transmission line, for processing the acquisition signals of the ultrasonic sensor to obtain a processing result;

[0012] A monitoring and warning module, connected to the data processing module, for displaying the processing result and generating an alarm signal for prompting.

[0013] Optionally, the data processing module includes:

[0014] An ultrasonic pulse acquisition unit, connected to the ultrasonic sensor through the signal transmission line, for acquiring the pulse signals of the ultrasonic sensor; the pulse signals include the pulse signals of the unstable working state of the bearing bush oil film of the pumped-storage unit and the pulse signals of the stable working state;

[0015] A data conversion unit, communicatively connected to the ultrasonic pulse acquisition module, for converting the pulse signals into electrical signals;

[0016] An analysis and statistics unit, communicatively connected to the data conversion unit, for performing numerical statistics on the electrical signals.

[0017] Optionally, the monitoring and warning device further includes a chassis; the data processing module and the monitoring and warning module are both disposed in the chassis.

[0018] Optionally, the voltage scale of the electrical signal corresponds to the pulse amplitude of the pulse signal.

[0019] Optionally, the rotational speed conditions of the pumped-storage unit include high rotational speed and low rotational speed;

[0020] The high rotational speed is higher than 60 revolutions per minute and corresponds to 20,000 voltage scales;

[0021] The low rotational speed is lower than 60 revolutions per minute and corresponds to 600,000 voltage scales.

[0022] Optionally, threaded holes are provided on the bearing surface of the bearing bush of the pumped-storage unit and the ultrasonic sensor, and the bearing bush of the pumped-storage unit and the ultrasonic sensor are fixed by bolts.

[0023] Optionally, the aperture of the threaded hole is 6 mm.

[0024] Optionally, the monitoring and early warning device further includes a power supply module for supplying power to the data processing module and the monitoring and early warning module.

[0025] This application also provides a pumped-storage unit, including the on-line monitoring and early warning device for the lubrication wear state of the bearing bush of the pumped-storage unit as described in any one of the above.

[0026] Generally speaking, compared with the prior art by the above technical solution conceived by this application, the following beneficial effects are obtained:

[0027] (1) The ultrasonic sensor is installed on the lifting hole of the bearing bush of the pumped-storage unit, that is, deployed on the surface of the bearing bush. Therefore, there is no direction requirement for installation. Compared with the traditional temperature measuring sensor and vibration measuring sensor, the ultrasonic sensor has the advantages of convenient deployment, improved installation and maintenance efficiency, etc. Moreover, the sensor is deployed on the surface of the bearing bush, which can directly and real-time monitor the working state of the bearing bush and the oil film condition, and provide lubrication state information by detecting the oil film change on the surface of the bearing bush.

[0028] (2) The monitoring and early warning device can real-time monitor the working data of the pumped-storage unit and give real-time early warning prompts, such as problems like too thin oil film or abnormal friction, etc. Finally, it displays and analyzes the working data obtained from the monitoring and early warning device. By providing an intuitive interface, the operator can understand the operation state of the unit in real time. This application discusses the process of monitoring, collecting and displaying the working data of the bearing bush of the pumped-storage unit, and finally displays the data analysis result. Through the above process, the early warning accuracy of the lubrication state of the bearing bush can be improved to ensure the stable operation of the bearing bush and extend the service life of the equipment.

[0029] (3) The high-precision monitoring ability of the ultrasonic sensor, combined with the real-time data processing of the monitoring and early warning device, greatly improves the monitoring accuracy of the lubrication state of the bearing bush, avoids operation problems caused by insufficient monitoring, and through timely early warning prompts and data display, enables the operator to perform preventive maintenance and management, effectively enhancing the operation stability and maintenance economy of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is one of the structural schematic diagrams of the on-line monitoring and early warning device for the lubrication wear state of the bearing bush of the pumped-storage unit provided by the embodiment of this application;

[0031] Figure 2It is the second structural schematic diagram of the on-line monitoring and early warning device for the lubrication wear state of the bearing bush of the pumped-storage unit provided by the embodiment of the present application;

[0032] Figure 3 It is the network architecture diagram of the on-line monitoring and early warning device for the lubrication wear state of the bearing bush of the pumped-storage unit provided by the embodiment of the present application;

[0033] Figure 4 It is the third structural schematic diagram of the on-line monitoring and early warning device for the lubrication wear state of the bearing bush of the pumped-storage unit provided by the embodiment of the present application;

[0034] Figure 5 It is the first schematic diagram of the relationship between the time and the voltage amplitude of the display content provided by the embodiment of the present application;

[0035] Figure 6 It is the second schematic diagram of the relationship between the time and the voltage amplitude of the display content provided by the embodiment of the present application;

[0036] Figure 7 It is the first schematic diagram of the relationship between the voltage and the number of voltage occurrences of the display content provided by the embodiment of the present application;

[0037] Figure 8 It is the second schematic diagram of the relationship between the voltage and the number of voltage occurrences of the display content provided by the embodiment of the present application. Detailed implementation manners

[0038] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0039] The term "and / or" in this article is a relationship describing associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. The symbol " / " in this article represents an "or" relationship between associated objects. For example, A / B represents A or B.

[0040] The terms "first" and "second" in the description and claims of this article are used to distinguish different objects, rather than to describe a specific order of objects. For example, the first response message and the second response message are used to distinguish different response messages, rather than to describe the specific order of the response messages.

[0041] In the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a specific way.

[0042] In the description of the embodiments of the present application, unless otherwise specified, "multiple" means two or more than two. For example, multiple processing units refer to two or more processing units, etc.; multiple elements refer to two or more elements, etc.

[0043] Next, the technical solutions provided in the embodiments of the present application are introduced.

[0044] Reference Figure 1 The present application provides an online monitoring and early warning device for lubrication and wear status of bearing bushes of a pumped storage unit, comprising:

[0045] The ultrasonic sensor 1 is arranged on the surface of the bearing of the pumped storage unit, and is fixedly connected to the bearing through the hoisting hole of the bearing of the pumped storage unit, and is used to collect the working data of the bearing oil film; the working data includes the data of the bearing oil film in the unstable working state and the data in the stable working state;

[0046] The monitoring and early warning device 2 is connected to the signal output end of the ultrasonic sensor through a signal transmission line, and is used to monitor the working data of the pumped storage unit, display the working data and issue early warning prompts.

[0047] Specifically, in this embodiment, the ultrasonic sensor is installed on the hoisting hole of the bearing of the pumped storage unit, directly contacting the surface of the bearing, and is mainly used to monitor the oil film state and working conditions on the bearing surface in real time, and detect tiny oil film changes through ultrasonic technology.

[0048] Furthermore, the bearing surface of the pumped storage unit bearing and the ultrasonic sensor are both provided with threaded holes, and the pumped storage unit bearing and the ultrasonic sensor are fixed by bolts. The diameter of the threaded hole is 6 mm, and its specific size can be adjusted according to actual conditions.

[0049] The monitoring and early warning device is connected to the ultrasonic sensor through a signal transmission line and receives the data sent back by the sensor. The monitoring and early warning device is responsible for collecting and processing the data obtained from the ultrasonic sensor, performing real-time monitoring and analysis, and can identify abnormalities in the lubrication status of the bearing and issue early warning prompts.

[0050] The application device is communicatively connected to the monitoring and warning device to obtain the processed working data. The application device provides a user interface to display the data processed by the monitoring and warning device. The operator can, through the application device, understand in real time the operating status of the pumped-storage unit, including the lubrication condition of the bearing bush and any possible problems.

[0051] The specific working principle is as follows:

[0052] The ultrasonic sensor monitors the oil film state on the surface of the bearing bush through the hoisting hole and transmits the data to the monitoring and warning device. After receiving the data, the monitoring and warning device monitors in real time the working data of the pumped-storage unit, analyzes the oil film thickness and the change trend. The monitoring and warning device will send a warning signal to the application device, and the application device is responsible for presenting this information to the operator in an intuitive manner to help them make timely responses.

[0053] Through the connection and cooperation of this structure, the operating efficiency and reliability of the pumped-storage unit can be effectively improved, while reducing the risk of unexpected shutdowns and damages.

[0054] In the embodiment of the present application, the ultrasonic sensor is installed on the hoisting hole of the bearing bush of the pumped-storage unit, that is, deployed on the surface of the bearing bush. Therefore, there is no requirement for the installation direction. Compared with the traditional temperature measuring sensor and vibration measuring sensor, the ultrasonic sensor has the advantages of convenient deployment, improved installation and maintenance efficiency, etc. Moreover, since the sensor is deployed on the surface of the bearing bush, it can directly and real-time monitor the working status of the bearing bush and the oil film condition, and provide lubrication status information by detecting the change of the oil film on the surface of the bearing bush.

[0055] Referring to Figure 2 , optionally, the monitoring and warning device 2 includes:

[0056] A data processing module 21, connected to the ultrasonic sensor through a signal transmission line, for processing the acquisition signal of the ultrasonic sensor to obtain a processing result;

[0057] A monitoring and warning module 22, connected to the data processing module, for displaying the processing result and generating an alarm signal for prompting.

[0058] The monitoring and warning device further includes a chassis 23; both the data processing module and the monitoring and warning module are arranged in the chassis.

[0059] The monitoring and warning device further includes a power supply module 24, and the power supply module is used to supply power to the data processing module and the monitoring and warning module.

[0060] Further, the data processing module 21 includes:

[0061] The ultrasonic pulse acquisition unit 211 is connected to the ultrasonic sensor through the signal transmission line and is used to acquire the pulse signals of the ultrasonic sensor; the pulse signals include the pulse signals in the unstable working state of the bearing oil film of the pumped storage unit and the pulse signals in the stable working state.

[0062] The data conversion unit 212 is communicatively connected to the ultrasonic pulse acquisition module and is used to convert the pulse signals into electrical signals.

[0063] The analysis and statistics unit 213 is communicatively connected to the data conversion unit and is used to perform numerical statistics on the electrical signals.

[0064] In this embodiment, the amplitude of each pulse in the ultrasonic pulse train corresponds to the voltage scale of the electrical signal, and the correlation relationship between the friction pulse and the wear, damage of the bearing oil film and the lubricating oil pollution situation is established based on the numerical statistics of the voltage scale, so as to judge the lubrication wear state of the bearing, and further improve the bearing maintenance efficiency, reduce the maintenance cost, and ensure the reliable operation of the equipment.

[0065] Among them, the voltage scale of the electrical signal corresponds to the pulse amplitude of the pulse signal. The speed conditions of the pumped storage unit include high speed and low speed;

[0066] The high speed is higher than 60 revolutions per minute and corresponds to 20,000 voltage scales;

[0067] The low speed is lower than 60 revolutions per minute and corresponds to 600,000 voltage scales.

[0068] It should be noted that according to the specific operating conditions of the pumped storage unit, the number of voltage scales can be adjusted according to the actual speed.

[0069] Refer to Figure 3 , Figure 3 is the network architecture diagram of the on-line monitoring and early warning device for the lubrication wear state of the bearing of the pumped storage unit in the embodiment of the present application. Among them, the ultrasonic sensor in the present application is located in the perception layer, and the data processing and monitoring and early warning unit is in the network layer and the application layer at the same time. Data acquisition and data aggregation are realized in the network layer, and local processing and display of data are realized in the application layer, and the data analysis results of this unit can be accessed by other workstations in the application layer through the network.

[0070] Refer to Figure 4 , the monitoring and early warning module includes a control and display unit, and the control and display unit is used to display the statistical results of the analysis and statistics unit.

[0071] Refer to Figure 5 and Figure 6, which respectively represent the display content of the control and display unit in the embodiments of the present application, and are respectively the schematic diagram of the relationship between the time (in seconds) when the bearing bush wear is obvious, there is no abnormal friction of the bearing bush, and the voltage amplitude. It can be seen that the voltage amplitude when the bearing bush wear is obvious is significantly higher than that when there is no abnormal friction of the bearing bush. In actual operation, the staff can judge the wear condition of the bearing bush according to the voltage amplitude of the control and display unit.

[0072] Refer to Figure 7 and Figure 8 , which respectively represent the schematic diagram of the relationship between the voltage and the number of voltage occurrences when the bearing bush lubrication is poor and the wear is obvious, and when the bearing bush lubrication state is good. It can be seen that the voltage value corresponding to the most occurrences, the total number of occurrences when the bearing bush lubrication is poor and the wear is obvious are different from those when the bearing bush lubrication state is good. In actual operation, the staff can also judge the wear condition of the bearing bush according to the number of voltage occurrences of the control and display unit.

[0073] The present application also provides a pumped-storage unit, including the on-line monitoring and early warning device for the lubrication and wear state of the bearing bush of the pumped-storage unit as described in any one of the above.

[0074] It can be understood that the various numerical numbers involved in the embodiments of the present application are only for the convenience of description and are not used to limit the scope of the embodiments of the present application.

[0075] Those skilled in the art can easily understand that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. An on-line monitoring and early warning device for the lubrication wear state of the bearing bush of a pumped storage unit, characterized in that, Comprising: An ultrasonic sensor, which is arranged on the surface of the bearing bush of the pumped-storage unit and is fixedly connected to the bearing bush through the hoisting hole of the bearing bush of the pumped-storage unit, and is used for collecting the working data of the bearing bush oil film; the working data includes the data in the unstable working state and the stable working state of the bearing bush oil film; A monitoring and warning device, which is connected to the signal output end of the ultrasonic sensor through a signal transmission line, is used for monitoring the working data of the pumped-storage unit, displaying the working data and giving a warning prompt.

2. The on-line monitoring and early warning device for the lubrication wear state of the bearing bush of a pumped storage unit according to claim 1, characterized in that Threaded holes are provided on the bearing surface of the bearing bush of the pumped-storage unit and on the ultrasonic sensor, and the bearing bush of the pumped-storage unit and the ultrasonic sensor are fixed by bolts.

3. The on-line monitoring and early warning device for the lubrication wear state of the bearing bush of a pumped-storage unit according to claim 2, wherein, The aperture of the threaded hole is 6 mm.

4. The on-line monitoring and early warning device for the lubrication wear state of the bearing bush of the pumped-storage unit according to claim 1, characterized in that, The monitoring and warning device includes: A data processing module, which is connected to the ultrasonic sensor through a signal transmission line, is used for processing the collected signal of the ultrasonic sensor to obtain a processing result; A monitoring and warning module, which is connected to the data processing module, is used for displaying the processing result and generating an alarm signal for prompting.

5. The on-line monitoring and early warning device for the lubrication and wear state of the bearing bush of the pumped-storage unit according to claim 4, characterized in that, The data processing module includes: An ultrasonic pulse acquisition unit, which is connected to the ultrasonic sensor through the signal transmission line, is used for acquiring the pulse signal of the ultrasonic sensor; the pulse signal includes the pulse signal in the unstable working state of the bearing bush oil film of the pumped-storage unit and the pulse signal in the stable working state; A data conversion unit, which is communicatively connected to the ultrasonic pulse acquisition unit, is used for converting the pulse signal into an electrical signal; An analysis and statistics unit, which is communicatively connected to the data conversion unit, is used for numerically statistically analyzing the electrical signal.

6. The on-line monitoring and early warning device for the lubrication wear state of the shaft bearing of a pumped storage unit according to claim 4, characterized in that, The monitoring and warning device further includes a chassis; the data processing module and the monitoring and warning module are both arranged in the chassis.

7. The on-line monitoring and early warning device for the lubrication wear state of the bearing bush of a pumped storage unit according to claim 5, characterized in that The voltage scale of the electrical signal corresponds to the pulse amplitude of the pulse signal.

8. The on-line monitoring and early warning device for the lubrication wear state of the bearing bush of a pumped storage unit according to claim 1, characterized in that, The speed conditions of the pumped-storage unit include high speed and low speed; The high speed is higher than 60 revolutions per minute and corresponds to 20,000 voltage scales; The low speed is lower than 60 revolutions per minute and corresponds to 600,000 voltage scales.

9. The on-line monitoring and early warning device for the lubrication wear state of the bearing bush of a pumped-storage unit according to claim 4, characterized in that, The monitoring and warning device further includes a power supply module, and the power supply module is used for supplying power to the data processing module and the monitoring and warning module.

10. A pumped storage unit, characterized in that, Including the on-line monitoring and warning device for the lubrication and wear state of the bearing bush of the pumped-storage unit according to any one of claims 1-9 above.

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