A temperature and vibration composite sensor for online monitoring of rotating machinery

Abstract

The application discloses a temperature and vibration composite sensor for online monitoring of rotating machinery applied to the field of sensors and aims to solve the problems of easy abrasion of signal transmission of existing rotating parts and fixed ends, inconvenience of installation and maintenance and low reliability of monitoring data. The temperature and vibration composite sensor comprises a rotating shaft, a bearing, a sensor assembly and a rotating connector. The top end of the bearing fixing ring is provided with the rotating connector, which comprises a protective ring, a rotating ring and a floating connecting post, and the inner wall of the protective ring is provided with a connecting ring. The sensor assembly is connected with the rotating shaft through a mounting bracket, and comprises an encapsulating shell, a temperature and vibration sensor main body and a preprocessing unit. The sensing end of the temperature and vibration sensor is attached to the rotating shaft. The mounting bracket is designed in a U-shaped buckle and pawl mode, and cooperates with a pressure sensing unit to ensure stability. Long-term contact abrasion is avoided through dynamic butt joint of the floating connecting post and the connecting ring. The preprocessing unit realizes conventional low-power monitoring and abnormal real-time response, prolongs the service life of equipment and provides efficient and intelligent support for state early warning and fault diagnosis of rotating machinery.

Description

Technical Field

[0001] This invention relates to the field of sensors, and in particular to a temperature and vibration composite sensor for online monitoring of rotating machinery. Background Technology

[0002] Existing temperature and vibration composite sensors are integrated sensing devices that combine temperature and vibration monitoring functions. Their core consists of a temperature-sensitive element (such as a thermocouple, RTD, or thermistor) and a vibration detection unit (such as a piezoelectric sensor or MEMS accelerometer). Combined with signal conditioning, A / D conversion, and data processing modules, they can simultaneously acquire temperature parameters and vibration signals of the target object. Their design focuses on miniaturization and integration, supports multiple output interfaces, and is suitable for various scenarios such as industry, transportation, and smart homes.

[0003] Chinese invention patent CN118347542B discloses a vibration-temperature composite sensor with high electromagnetic interference resistance. When maintenance or disassembly is required, simply rotate the knob to separate the contact head from the sliding plate. Then the sliding plate can continue to move downwards, i.e., continue to rotate the outer shell clockwise until the limit block aligns with the inlet / outlet slot, at which point the outer shell can be removed. This achieves both tight installation of the sensor and convenient maintenance and disassembly. The structure is simple and the operation is easy.

[0004] Chinese patent application CN118583218A discloses a temperature and vibration integrated sensor. The hollow elastic element of the temperature and vibration integrated sensor can reduce the weight of the elastic vibration pickup component and improve its elasticity. Thus, through the combination of the hollow elastic element and the conductive element, the external vibration can be amplified and fed back to the reflector. The external excitation is then converted into the deformation of the reflector, which can improve the vibration pickup sensitivity.

[0005] Most existing sensors used on the rotating end of rotating machinery are electrically connected to external systems via rotating wiring structures. However, long-term contact with traditional rotating wiring structures can easily lead to conductor wear, affecting signal transmission stability and equipment lifespan. At the same time, installation and maintenance are inconvenient. The disassembly process of sensors installed on the rotating end is complicated, making it difficult to adapt to different types of rotating machinery, resulting in low maintenance efficiency. Furthermore, the sensing end of existing sensors installed on the rotating end is prone to unstable contact due to vibration, leading to data acquisition deviations and low reliability of monitoring data. Summary of the Invention

[0006] The core of this invention lies in solving the problems of easy wear and tear on signal transmission between rotating components and fixed ends, inconvenient installation and maintenance, and low reliability of monitoring data in existing technologies through a dynamic docking structure of floating terminals and rotary connectors, and a convenient mounting bracket design. Simultaneously, it achieves a balance between low-power operation during routine monitoring and real-time response to abnormal conditions, extending the service life of the equipment.

[0007] To solve the above problems, the present invention adopts the following technical solution.

[0008] A temperature and vibration composite sensor for online monitoring of rotating machinery includes a rotating shaft on the rotating machinery and a bearing matched with the rotating shaft. The bearing includes a fixed ring and a rotating ring connected to the rotating shaft. A sensor assembly is detachably connected to the rotating shaft via a mounting bracket. A rotary connector is fixedly connected to the top of the fixed ring. The rotary connector includes a protective ring. The upper opening of the protective ring is rotatably connected to the rotating ring, which is fixedly connected to the rotating shaft. A floating terminal matching the sensor assembly is movably inserted into the rotating ring. A terminal ring matching the floating terminal is connected to the lower end of the inner wall of the protective ring.

[0009] The sensor assembly includes a housing that is detachably connected to a mounting bracket. A temperature and vibration sensor body is detachably connected inside the housing. A pre-processing unit is connected between the temperature and vibration sensor body and the housing. The sensing end of the temperature and vibration sensor body is in contact with the rotating shaft.

[0010] The floating terminal block includes a terminal block that is fixedly connected to the housing and connected to the signal of the preprocessing unit. The lower end of the terminal block is movably connected to a movable post, and the top end of the movable post is connected to a connector for mating with the terminal ring. A return spring and an electromagnet for driving the displacement of the movable post are connected inside the terminal block.

[0011] Furthermore, the preprocessing unit is equipped with a wireless signal receiving unit, a storage unit, and a battery. During normal operation, the sensor components perform routine monitoring, and the floating terminals periodically connect with the connection ring to upload data, reset the storage space, and charge the battery.

[0012] Furthermore, when the preprocessing unit detects abnormal data, it activates the electromagnet to connect the connector on the floating terminal to the terminal ring, enabling the sensor assembly's data to be uploaded and analyzed in real time, so as to determine the abnormal situation in real time through data analysis.

[0013] Furthermore, the mounting bracket includes a clamping plate and a pair of U-shaped clips detachably connected to the clamping plate. The sensor assembly is snapped between the pair of U-shaped clips, and the clamping plate is threaded with claws symmetrically arranged with the sensor assembly.

[0014] Furthermore, the connector ring includes a base ring, a driven ring rotatably connected to the base ring, a conductor ring rotatably connected to the base ring is embedded in the driven ring, and an annular mating groove matching the connector is provided on the conductor ring.

[0015] Furthermore, a pressure sensor matching the conductor ring is installed inside the driven ring. The pressure sensor detects the pressure when the connector contacts the conductor ring. An alarm is triggered when the pressure is greater than or less than a set threshold. When the pressure is greater than the set threshold, it is determined that there is a risk of wear; when the pressure is less than the set value, it is determined that there is poor contact.

[0016] Furthermore, the electromagnet is installed at the top of the terminal block, a limit ring is installed at the top of the movable column, and a return spring is installed between the limit ring and the inner wall of the bottom end of the terminal block.

[0017] Furthermore, an elastic retaining ring for snapping the body of the temperature and vibration sensor is installed inside the package, and a pressure sensing unit connected to the preprocessing unit is installed on the elastic retaining ring.

[0018] Furthermore, the surface of the pretreatment unit is equipped with an indicator light to show whether the pressure detected by the pressure sensing unit is qualified. When the pressure value detected by the pressure sensing unit reaches the preset safety value, the indicator light is solid green, indicating that the installation is in place; if the pressure is insufficient or excessive, the indicator light flashes and the pretreatment unit alarms.

[0019] Furthermore, it also includes an auxiliary monitoring system, which includes a data processing module, a data acquisition module, a control module, and a data storage module;

[0020] The data acquisition module is used to collect real-time temperature and vibration raw data of the temperature and vibration sensor body, as well as historical monitoring data temporarily stored in the preprocessing unit. It performs data format standardization and preliminary screening, and synchronously transmits the effective data to the data processing module and the data storage module.

[0021] The data processing module receives data transmitted from the sensor components, processes and analyzes the data; during routine monitoring, the preprocessing unit performs data trend analysis and data threshold judgment; in case of anomalies, the data processing module analyzes data fluctuation characteristics in real time, identifies the fault type, and feeds back the analysis results to the control module.

[0022] The control module is used to coordinate the work of each preset component based on the analysis results of the data processing module and the preset control logic.

[0023] The data storage module is used to classify and store the raw monitoring data from the data acquisition module, the analysis results from the data processing module, the system operation logs, and the sensor parameter configuration information.

[0024] Compared with the prior art, the advantages of this invention are:

[0025] (1) This solution uses a dynamic docking structure between floating terminals and rotary connectors to enable continuous and reliable online monitoring of the temperature and vibration parameters of rotating machinery shafts. It effectively solves the signal transmission problem between rotating parts and fixed ends, ensuring low power consumption during routine monitoring, enabling real-time data upload and rapid analysis response under abnormal conditions, avoiding the risk of conductor wear caused by long-term rotary wiring, and easily extending the service life of the equipment.

[0026] (2) By fixing the sensor with a mounting bracket that is easy to install and remove, and by using the pressure sensing feedback mechanism between the mounting bracket and the sensor, it is not only convenient to install and maintain different types of sensors, but also to ensure that the sensor sensing end is firmly attached to the rotating shaft, providing efficient and intelligent technical support for the status warning, fault diagnosis and operation and maintenance decision of rotating machinery. Attached Figure Description

[0027] Figure 1 This is a perspective view of the present invention;

[0028] Figure 2 This is a side view of the present invention;

[0029] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at point A in the middle;

[0030] Figure 4 for Figure 2 Schematic diagram of the structure at point B;

[0031] Figure 5 This is a top view of the present invention;

[0032] Figure 6 This is a side view of the present invention;

[0033] Figure 7 This is a partial cross-sectional view of the floating terminal block and the terminal ring of the present invention when they are connected;

[0034] Figure 8 This is a flowchart of the process of the present invention.

[0035] Explanation of the labels in the diagram:

[0036] 1. Shaft; 2. Rotary connector; 21. Protective ring; 22. Rotary ring; 23. Connecting ring; 231. Base ring; 232. Driven ring; 233. Conductor ring; 3. Sensor assembly; 31. Encapsulation shell; 32. Temperature and vibration sensor body; 33. Pre-processing unit; 4. Floating terminal; 41. Terminal; 42. Movable post; 43. Connector; 5. Mounting bracket; 51. Clamping plate; 52. U-shaped buckle; 53. Claw. Detailed Implementation

[0037] The technical solutions will now be clearly and completely described with reference to the accompanying drawings in the embodiments of the present invention.

[0038] First implementation method:

[0039] Please see Figures 1-8A temperature and vibration composite sensor for online monitoring of rotating machinery includes a rotating shaft 1 on the rotating machinery and a bearing matched with the rotating shaft 1. The bearing includes a fixed ring and a rotating ring connected to the rotating shaft 1. A sensor assembly 3 is detachably connected to the rotating shaft 1 via a mounting bracket 5. A rotary connector 2 is fixedly connected to the top of the fixed ring. The rotary connector 2 includes a protective ring 21. The upper opening of the protective ring 21 is rotatably connected to a rotating ring 22 fixedly connected to the rotating shaft 1. A floating terminal 4 matched with the sensor assembly 3 is movably inserted into the rotating ring 22. A terminal ring 23 matched with the floating terminal 4 is connected to the lower end of the inner wall of the protective ring 21. The rotating ring 22, the mounting bracket 5, the sensor assembly 3, and the floating terminal 4 rotate synchronously with the rotating shaft 1.

[0040] The connection ring 23 includes a base ring 231, a driven ring 232 rotatably connected to the base ring 231, and a conductor ring 233 rotatably connected to the base ring 231 embedded in the driven ring 232. The conductor ring 233 has an annular mating groove that matches the connector 43. A connection port is provided on the outer wall of the base ring 231, and an annular conductor that matches the conductor ring 233 is embedded in the base ring 231. The connection port is electrically connected to the conductor ring 233 through the base ring 231, and the connection port is connected to an external system through a cable.

[0041] A pressure sensor matching the conductor ring 233 is installed inside the driven ring 232. The pressure sensor detects the pressure when the connector 43 contacts the conductor ring 233. An alarm is triggered when the pressure is greater than or less than the set threshold. Excessive pressure can accelerate the wear of the connector 43 and the conductor ring 233, while insufficient pressure indicates poor contact.

[0042] The sensor assembly 3 includes a housing 31 detachably connected to the mounting bracket 5. A temperature and vibration sensor body 32 is detachably connected inside the housing 31. A preprocessing unit 33 is connected between the temperature and vibration sensor body 32 and the housing 31. The sensing end of the temperature and vibration sensor body 32 is in contact with the rotating shaft 1. The preprocessing unit 33 is equipped with a wireless signal receiving unit, a storage unit and a battery. When the sensor assembly 3 is working normally, routine monitoring is performed through the sensor assembly 3. The floating terminal 4 periodically connects with the terminal ring 23 to upload data, reset the storage space and charge.

[0043] When the preprocessing unit 33 detects abnormal data (the preprocessing unit 33 determines whether the temperature and vibration data collected by the temperature and vibration sensor body 32 exceed the set threshold; if it does, it determines that abnormal data has occurred), it activates the electromagnet to connect the connector 43 on the floating terminal 4 to the terminal ring 23, so that the data of the sensor assembly 3 can be uploaded and analyzed in real time, and abnormal situations can be determined in real time through data analysis.

[0044] The floating terminal 4 includes a terminal 41 that is fixedly connected to the rotating ring 22 and signal-connected to the preprocessing unit 33. A movable terminal 42 is movably connected to the lower end of the terminal 41. A connector 43 for mating with the terminal ring 23 is connected to the top end of the movable terminal 42. A return spring and an electromagnet for driving the displacement of the movable terminal 42 are connected inside the terminal 41. The electromagnet is installed at the top end of the terminal 41. A limit ring (with a permanent magnet at the top end of the limit ring) is installed at the top end of the movable terminal 42. The return spring is installed between the limit ring and the inner wall of the bottom end of the terminal 41.

[0045] When the electromagnet is energized, it repels the movable column 42, driving the movable column 42 downward and locking it into the wiring ring 23, so that the connector 43 and the wiring ring 23 form a stable electrical connection.

[0046] Mounting bracket 5 includes a clamping plate 51 and a pair of U-shaped buckles 52 detachably connected to the clamping plate 51. The sensor assembly 3 is snapped between the pair of U-shaped buckles 52. The clamping plate 51 is threaded with claws 53 symmetrically arranged with the sensor assembly 3. An elastic retaining ring for snapping the temperature vibration sensor body 32 is installed inside the encapsulation shell 31. A pressure sensing unit connected to the pre-processing unit 33 is installed on the elastic retaining ring. An indicator light for displaying that the pressure detected by the pressure sensing unit is qualified is installed on the surface of the pre-processing unit 33. When the mounting bracket 5 is installed, the claws 53 apply a clamping force to the sensor assembly 3. The pressure sensing unit monitors the pressure on the elastic retaining ring in real time. When the preset safety value is reached, the indicator light is solid green, indicating that the installation is in place. If the pressure is insufficient or overloaded, the indicator light flashes to alarm, ensuring that the encapsulation shell 31 and the rotating shaft 1 are firmly attached.

[0047] The working process of this plan is as follows:

[0048] First, in the routine monitoring phase: the sensing end of the temperature and vibration sensor body is attached to the rotating shaft 1 to collect the temperature and vibration signals of the rotating machinery in real time. The preprocessing unit 33 receives the data and temporarily stores it in the built-in storage unit. The battery provides low-power power to the sensor assembly 3 to maintain continuous monitoring.

[0049] Secondly, during the periodic data interaction phase: the system triggers the electromagnet according to a preset cycle. The electromagnet repels the movable column 42, causing it to move downwards, and the connector 43 tightly connects with the connecting ring 23 inside the rotating connector 2 at the top of the fixed ring. The preprocessing unit 33 uploads the stored historical data to the external terminal through the floating connector 4. After synchronization is completed, the storage space is reset, and the battery is charged during the synchronization process. After the interaction ends, the electromagnet is turned off, and the movable column 42 is reset upwards under the action of the return spring, separating the connector 43 from the connecting ring 23, and resuming normal monitoring. During this process, the pressure sensor continuously monitors the contact pressure between the connector 43 and the conductor ring 233 to ensure stable and reliable data transmission. If the pressure is abnormal, the system immediately triggers an audible and visual alarm and stops charging and communication. At the same time, the preprocessing unit 33 sends an alarm signal and turns off the electromagnet to reset the movable column 42, preventing damage to the connector 43 and the conductor ring 233.

[0050] When the preprocessing unit 33 detects that the data exceeds the preset threshold and determines it to be abnormal, it immediately activates the electromagnet to achieve rapid docking between the connector 43 and the wiring ring 23. The real-time signal collected by the temperature and vibration sensor body 32 is processed by the preprocessing unit 33 and then transmitted in real time to the external analysis system through the wiring ring 23 and the floating terminal 4. The external system analyzes the abnormality type based on the data fluctuation characteristics, such as bearing wear, excessive temperature, etc. (the external analysis system adopts existing technology, and those skilled in the art shall select a suitable analysis system from the existing technology for data analysis). After the abnormality is resolved, the electromagnet is turned off, the movable terminal 42 is reset, and the system returns to the normal monitoring mode.

[0051] Throughout the process, the mounting bracket 5 secures the sensor assembly 3 with the clamp plate 51 and the U-shaped buckle 52 to ensure that the sensing end of the temperature and vibration sensor body 32 fits tightly against the rotating shaft 1, thus ensuring the accuracy of the monitoring data.

[0052] This embodiment can realize continuous and reliable online monitoring of the temperature and vibration parameters of the rotating machinery shaft 1; through the dynamic docking structure of the floating terminal 4 and the rotary connector 2, the signal transmission problem between the rotating part and the fixed end is effectively solved, which not only ensures low power consumption operation during normal monitoring, but also realizes real-time data upload and rapid analysis response under abnormal conditions, and avoids the risk of conductor wear caused by long-term rotating wiring, which can easily extend the service life of the equipment.

[0053] Meanwhile, this solution facilitates the disassembly and maintenance of different types of sensors through the pressure sensing feedback of the mounting bracket 5 and the pressure monitoring mechanism of the floating dock, and ensures the stable fit between the sensing end and the rotating shaft 1, thereby extending the service life of the equipment and providing efficient and intelligent technical support for the status early warning, fault diagnosis and operation and maintenance decision-making of rotating machinery.

[0054] Second implementation method:

[0055] It also includes an auxiliary monitoring system, which comprises a data processing module, a data acquisition module, a control module, and a data storage module;

[0056] Data acquisition module: responsible for collecting real-time temperature and vibration raw data of the temperature and vibration sensor body 32, as well as historical monitoring data temporarily stored in the preprocessing unit 33, performing data format standardization and preliminary screening (removing invalid interference data), and synchronously transmitting the valid data to the data processing module and data storage module.

[0057] The data processing module is used to receive data transmitted by sensor component 3, process and analyze the data; the data processing module performs in-depth analysis of the data through built-in algorithms (the appropriate algorithms in the prior art are selected and set by those skilled in the art, such as vibration spectrum analysis, temperature change trend fitting, and abnormal feature extraction); during routine monitoring, it performs data trend analysis (such as judging the rate of change of vibration amplitude and the drift of average temperature) and data threshold judgment (such as judging whether the temperature and vibration data exceed the set threshold). The data threshold judgment program is preset in the preprocessing unit 33. The preprocessing unit 33 initially judges whether the temperature and vibration data exceed the set threshold. If they exceed the threshold, it judges the abnormality and controls the floating terminal 4 to connect.

[0058] When an anomaly occurs, the system analyzes the data fluctuation characteristics in real time (such as a sudden increase in high-frequency vibration components or temperature exceeding the threshold), identifies the fault type (such as bearing wear or excessive temperature), and feeds back the analysis results (including fault level and suspected fault location) to the control module.

[0059] The control module is used to coordinate the operation of various preset components based on the analysis results of the data processing module and the preset control logic. For example, it controls the start and stop of the electromagnet in the rotary connector 2 to realize the docking / disconnection of the floating terminal 4 and the terminal ring 23 (the docking is triggered in a normal cycle to complete data upload, reset the storage space of the preprocessing unit 33 and charge the battery, and the docking is immediately controlled to realize real-time data transmission in case of abnormality); it adjusts the sampling frequency of the sensor component (increases to high-frequency sampling mode in case of abnormality); it receives external control commands (such as remote maintenance commands) and executes corresponding operations (such as forcibly starting data upload).

[0060] The data storage module is responsible for classifying and storing the raw monitoring data from the data acquisition module, the analysis results from the data processing module (including fault diagnosis reports and health trend curves), system operation logs (such as docking time, charging duration, and time of occurrence of abnormal events), and sensor parameter configuration information (such as sampling frequency and abnormal thresholds). The data storage module adopts a hierarchical storage architecture (temporary cache area, regular data area, and abnormal data area), supports historical data query by time / type, encrypted backup of key data, and export of data from third-party systems (such as equipment management platforms), providing data support for equipment lifecycle maintenance and monitoring algorithm optimization.

[0061] This implementation method enables multi-dimensional, end-to-end intelligent monitoring and management of the operating status of rotating machinery. Through standardized processing and invalid data filtering in the data acquisition module, the validity and consistency of input data are ensured. Deep algorithm analysis in the data processing module enables trend warnings under normal conditions and rapid identification of fault types under abnormal conditions. Dynamic coordination in the control module intelligently adjusts the sensor sampling frequency and controls the docking / disconnection timing of the floating terminal 4, optimizing energy consumption while ensuring monitoring accuracy. The hierarchical storage architecture of the data storage module enables categorized management and convenient retrieval of raw data, analysis results, and system logs.

[0062] The above description is merely a preferred embodiment of the present invention; it encompasses all the protection scope of the present invention. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in the present invention, based on the technical solutions and improved concepts of the present invention, should be covered within the protection scope of the present invention.

Claims

1. A temperature and vibration composite sensor for online monitoring of rotating machinery, comprising a rotating shaft on the rotating machinery and a bearing matched with the rotating shaft (1), the bearing comprising a fixed ring and a rotating ring connected to the rotating shaft (1), and a sensor assembly (3) detachably connected to the rotating shaft (1) via a mounting bracket (5), characterized in that: The top end of the fixed ring is fixedly connected with a rotary connector (2), the rotary connector (2) comprises a protective ring (21), the upper end of the protective ring (21) is rotatably connected with a rotating ring (22) fixedly connected with the rotating shaft (1), the rotating ring (22) movably inserts a floating terminal post (4) matched with the sensor assembly (3), and the inner wall of the protective ring (21) is connected with a terminal ring (23) matched with the floating terminal post (4). The sensor assembly (3) comprises a packaging shell (31) detachably connected to a mounting rack (5), and a temperature and vibration sensor body (32) is detachably connected in the packaging shell (31); a preprocessing unit (33) is connected between the temperature and vibration sensor body (32) and the packaging shell (31); and the sensing end of the temperature and vibration sensor body (32) is attached to the rotating shaft (1). The floating terminal post (4) comprises a terminal post (41) fixedly connected with the packaging shell (31) and signal-connected with the preprocessing unit (33), the lower end of the terminal post (41) movably connects a movable post (42), the top end of the movable post (42) is connected with a butt joint (43) for butt joint with the terminal ring (23), and the terminal post (41) is connected with a reset spring and an electromagnet for driving displacement of the movable post (42). The terminal ring (23) comprises a base ring (231), the base ring (231) rotatably connects a driven ring (232), the driven ring (232) is embeddedly installed with a conductor ring (233) rotatably connected with the base ring (231), and the conductor ring (233) is provided with an annular butt joint groove matched with the butt joint (43); a pressure sensor matched with the conductor ring (233) is installed in the driven ring (232), and the pressure of the butt joint (43) and the conductor ring (233) when being in contact is detected by the pressure sensor. An elastic clamping ring for clamping the temperature and vibration sensor body (32) is installed in the packaging shell (31), and a pressure sensing unit connected with the preprocessing unit (33) is installed on the elastic clamping ring.

2. The thermo-vibration compound sensor for online monitoring of rotating machinery according to claim 1, wherein: A wireless signal receiving unit, a storage unit and a storage battery are arranged in the preprocessing unit (33), when the sensor assembly (3) is normally working, the floating terminal post (4) is periodically butt-jointed with the terminal ring (23) to upload data, reset storage space and charge.

3. The thermo-vibration compound sensor for online monitoring of rotating machinery according to claim 1, wherein: When the preprocessing unit (33) monitors abnormal data, the electromagnet is started to make the butt joint (43) on the floating terminal post (4) butt-jointed with the terminal ring (23), so that the data of the sensor assembly (3) is uploaded and analyzed in real time, and the abnormal condition is judged in real time through data analysis.

4. The thermo-vibration compound sensor for online monitoring of rotating machinery according to claim 1, wherein: The mounting rack (5) comprises a clamping plate (51) and a pair of U-shaped buckles (52) detachably connected to the clamping plate (51), the sensor assembly (3) is clamped between the pair of U-shaped buckles (52), and the clamping plate (51) is screw-connected with clamping claws (53) symmetrically arranged with the sensor assembly (3).

5. The thermo-vibration compound sensor for online monitoring of rotating machinery according to claim 1, wherein: The pressure sensor detects the pressure greater than the set threshold or the pressure less than the set value, and an alarm is given, when the pressure is greater than the set threshold, it is determined that there is a wear risk; when the pressure is less than the set value, it is determined that the contact is poor.

6. The thermo-vibration compound sensor for online monitoring of rotating machinery according to claim 1, wherein: The electromagnet is installed at the top end of the terminal post (41), the top end of the movable column (42) is provided with a limiting ring, and the reset spring is installed between the limiting ring and the inner wall of the bottom end of the terminal post (41).

7. The thermo-mechanical vibration compound sensor for online monitoring of rotating machinery according to claim 1, wherein: The surface of the preprocessing unit (33) is provided with an indicating lamp for displaying that the pressure detected by the pressure sensing unit is qualified, when the pressure value detected by the pressure sensing unit reaches the preset safety value, the indicating lamp is green and always on, prompting that the installation is in place, if the pressure is insufficient or too large, the indicating lamp flashes and the preprocessing unit (33) alarms at the same time.

8. The thermo-mechanical vibration compound sensor for online monitoring of rotating machinery according to any one of claims 1-7, characterized in that: It also comprises an auxiliary monitoring system, which comprises a data processing module, a data acquisition module, a control module and a data storage module; The data acquisition module is used for collecting real-time temperature and vibration original data of the temperature and vibration sensor main body (32) and historical monitoring data temporarily stored in the preprocessing unit (33), and performing data format standardization and preliminary screening, and synchronously transmitting effective data to the data processing module and the data storage module; The data processing module is used for receiving data transmitted by the sensor assembly (3), processing and analyzing the data; when the conventional monitoring is performed, the data trend analysis and data threshold judgment are performed through the preprocessing unit (33); when the abnormality occurs, the data processing module analyzes the data fluctuation characteristics in real time, identifies the fault type, and feeds back the analysis result to the control module; The control module is used for coordinating the work of each preset component according to the analysis result of the data processing module and the preset control logic; The data storage module is used for storing the original monitoring data of the data acquisition module, the analysis result of the data processing module, the system operation log and the sensor parameter configuration information.

Images