Bearing fault diagnosis instrument

Abstract

The invention provides a bearing fault diagnosis instrument, and relates to the technical field of bearing detection equipment, the bearing fault diagnosis instrument comprises a machine body, a machine frame is fixedly installed on the machine body, a plurality of sampling mechanisms are installed on the machine frame, and an adjusting mechanism is arranged on an annular piece. The impact pulse, the vibration acceleration, the vibration speed and the vibration displacement value generated in the operation process of the bearing can be measured, and the functions of bearing state analysis and infrared temperature measurement are integrated. Therefore, the operation condition of the bearing can be comprehensively evaluated, and abundant data support is provided. The instrument is internally provided with an ISO vibration standard, and can automatically compare and maintain the vibration speed reading, thereby automatically indicating the alarm state of the machine. By means of the intelligent design, errors caused by manual judgment are reduced, and the accuracy and reliability of detection are improved. The bearing fault detector has the advantages of multifunctionality, intelligence, real-time monitoring, comprehensive evaluation and the like.

Description

Technical Field

[0001] The invention relates to the technical field of bearing detection equipment, and in particular to a bearing fault diagnosis instrument. Background Art

[0002] The bearing fault diagnostic instrument is a device specially used to monitor and analyze the operating status of bearings. It is a machine status monitoring instrument based on a microprocessor design and has multiple functions such as vibration monitoring, bearing status analysis and infrared temperature measurement. It is mainly used to monitor and diagnose the intrinsic quality, installation quality, operating conditions and health status of rolling bearings in electromechanical equipment, aerospace, metallurgy, petrochemical, shipbuilding, coal, light industry and other industries, providing a basis for predicting equipment failures and arranging maintenance plans.

[0003] The existing bearing fault detector is a portable electronic test instrument that measures the impact pulses generated by the bearing during operation and indicates the numerical value of its operating condition. It is a machine condition monitoring instrument based on a microprocessor design and has vibration monitoring, bearing condition analysis and infrared temperature measurement functions. The bearing fault detector can measure vibration acceleration, velocity and displacement values. When the vibration velocity reading is maintained, the instrument immediately compares the built-in ISO vibration standard and automatically indicates the machine alarm status. Traditional bearing detection indicators mainly look at wear, vibration, sound (the sound of the bearing rotor / ball rotation), bearing capacity, etc., while advanced bearing detection indicators mainly look at vibration, noise, shape and size, quality, friction, load and other indicators.

[0004] Since bearings will only fail or be abnormal under certain specific load conditions, the existing bearing fault diagnosis devices cannot dynamically adjust the load of the bearings, resulting in the omission of bearing failures or abnormalities under specific load conditions, thereby reducing the accuracy and reliability of fault diagnosis. As a result, the detector cannot fully and accurately reflect the performance of the bearing in the actual working environment. Therefore, we have made improvements and proposed a bearing fault diagnosis instrument. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the existing bearing fault diagnosis device cannot dynamically adjust the load of the bearing.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a bearing fault diagnostic instrument, including a body, a frame fixedly mounted on the body, a plurality of sampling mechanisms mounted on the frame, the sampling mechanisms are electrically connected to the body and used for data sampling of the body.

[0007] A ring-shaped part is provided at the lower end of the frame, a connecting part is fixed at the upper end of the ring-shaped part, a connecting shaft is fixedly installed at the upper end of the frame, and the lower end of the connecting shaft is rotatably installed on the connecting part. A plurality of top blocks distributed in a circular array are provided in the ring-shaped part, and an adjustment mechanism is provided on the ring-shaped part. The adjustment mechanism cooperates with the plurality of top blocks and fixes the bearings outside the ring-shaped part. The adjustment mechanism is used to adjust the positions of the plurality of top blocks and can fix bearings of different specifications.

[0008] A top plate is sleeved and fixedly mounted on the outer side of the upper end of the annular member, and a downward pressing mechanism is mounted on the top plate. The downward pressing mechanism is used to apply downward pressure to the bearing outside the annular member.

[0009] As a preferred technical solution of the present invention, the sampling mechanism includes a thermal imaging sensor, a vibration sensor and a noise sensor, and the sampling mechanism is used to sample the temperature parameters, vibration and noise parameters of the bearing.

[0010] As a preferred technical solution of the present invention, the surface of the top block is provided with anti-slip textures.

[0011] As a preferred technical solution of the present invention, the adjusting mechanism includes an inner plate arranged in an annular member, a plurality of eccentric wheels distributed in a circular array are arranged in the annular member, the outer surfaces of the eccentric wheels are respectively in contact with the top blocks, the eccentric parts of the eccentric wheels are fixedly installed with a first rotating shaft, the upper end of the first rotating shaft is rotatably installed on the inner plate, and the upper end of the first rotating shaft is fixedly installed with an external gear.

[0012] As a preferred technical solution of the present invention, the adjusting mechanism also includes a second rotating shaft rotatably mounted on the inner plate, a center wheel is fixedly mounted on the second rotating shaft, the center wheel is meshed with multiple external gears on the outside, a worm gear is fixedly mounted on the upper end of the second rotating shaft, a third rotating shaft is rotatably mounted in the annular member, a worm is fixedly mounted on the third rotating shaft, the worm is meshed with the worm wheel and the transmission between the two is self-locking.

[0013] As a preferred technical solution of the present invention, a first bevel gear is fixedly installed at one end of the third rotating shaft, a driving shaft is rotatably installed on the annular member, a second bevel gear is fixedly installed at the lower end of the driving shaft, the second bevel gear is meshed with the first bevel gear, and a turntable is fixedly installed at the upper end of the driving shaft.

[0014] As a preferred technical solution of the present invention, the pressing mechanism includes a plurality of guide rods distributed in a circular array, the guide rods are arranged in a sleeve shape, the guide rods pass through the top plate, the lower end of the top plate is provided with an annular plate sleeved outside the annular member, the lower end of the guide rods is fixed on the annular plate, the outside of the guide rods are sleeved with elastic members, the two ends of the elastic members are respectively fixedly connected to the top plate and the annular plate, and the upper ends of the guide rods are fixedly installed with limiting rings.

[0015] As a preferred technical solution of the present invention, the pressing mechanism further includes a pressurizing component, which is mounted on the top plate and is used to apply a repulsive force to the annular plate.

[0016] As a preferred technical solution of the present invention, the pressurizing assembly includes a plurality of magnets, which are respectively located in the guide rods and fixed on the annular plate; a plurality of support rods are fixedly installed on the top plate; one ends of the support rods extend into the guide rods respectively; electromagnets are fixedly installed on the ends of the support rods; the electromagnets will not hinder the upward and downward movement of the guide rods; a plurality of power supplies are fixedly installed on the top plate; the power supplies are respectively electrically connected to the electromagnets and the power supplies are used to power the electromagnets.

[0017] As a preferred technical solution of the present invention, rollers are installed at the four corners of the bottom of the machine body.

[0018] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a bearing fault diagnosis instrument, which has the following beneficial effects compared with the prior art: 1. The present invention not only has the function of vibration monitoring, which can measure the impact pulses, vibration acceleration, velocity and displacement values ​​generated by the bearing during operation, but also integrates the bearing status analysis and infrared temperature measurement functions, which enables it to comprehensively evaluate the operating conditions of the bearing and provide rich data support. The instrument has built-in ISO vibration standards, which can automatically compare and maintain vibration velocity readings, thereby automatically indicating the alarm status of the machine. This intelligent design reduces the error of manual judgment and improves the accuracy and reliability of detection.

[0019] 2. The present invention uses thermal imaging technology, and the instrument can monitor the temperature distribution of bearings and surrounding components in real time, and detect overheating or abnormal temperature points in time, which helps to evaluate the friction, lubrication and heat dissipation status of the bearing and prevent the occurrence of potential faults. The bearing detection indicators include vibration, noise, friction, temperature and other aspects. The instrument can comprehensively consider these indicators and provide comprehensive bearing status evaluation results, which helps the staff to accurately judge the operating status of the bearing, take maintenance measures in time, and extend the service life of the equipment.

[0020] 3. The present invention drives the top block to move outward by rotating the turntable and applies extrusion force to the inner wall of the bearing to be tested. Since the specifications of the bearings to be tested are different, the distance between the inner wall of the bearing to be tested and the top block is also different. The position of the top block in the device is adjustable, so that bearings to be tested of different specifications can be fixed. Therefore, the device can be used for bearings to be tested of different specifications. The device can be used for bearings to be tested of different specifications, is suitable for various industrial fields and different types of mechanical equipment, and has strong versatility and applicability.

[0021] 4. The present invention rotates the bearing to be tested and adjusts the relative position between the bearing and the sampling mechanism. The sampling mechanism can perform sampling work at different positions of the bearing. By sampling multiple positions of the bearing, more comprehensive and accurate parameter information such as vibration and temperature can be obtained. This information helps to more accurately determine the operating status and fault type of the bearing and improve the accuracy of fault diagnosis. The device can capture the fault characteristics of the bearing in different states, so as to more comprehensively understand the health status of the bearing.

[0022] 5. The present invention applies downward pressure to the bearing below the annular plate, and the bearing is in a pressure-bearing state. The bearing is then sampled by a sampling mechanism to measure the performance of the bearing under specific load conditions. At the same time, by controlling the magnetic force of the electromagnet, the pressure of the bearing can be adjusted accordingly. The performance of the bearing under different load conditions is measured, and more comprehensive and accurate bearing performance data can be obtained. These data help to more accurately determine the operating status and fault type of the bearing under different working conditions, thereby improving the accuracy of fault diagnosis. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A structural schematic diagram of a bearing fault diagnostic instrument provided for this application; Figure 2 A side view of the bearing fault diagnostic instrument provided for this application; Figure 3 This is a partial enlarged schematic diagram of the structure of the frame of the bearing fault diagnosis instrument provided in this application; Figure 4 This is an enlarged schematic diagram of a portion of the structure of the annular member of the bearing fault diagnosis instrument provided in the present application; Figure 5 An exploded schematic diagram of a ring member and a top block of the bearing fault diagnosis instrument provided in this application; Figure 6 This is a partial enlarged schematic diagram of the structure of the inner plate of the bearing fault diagnosis instrument provided by the present application; Figure 7 This is an enlarged schematic diagram of a portion of the structure at the top block of the bearing fault diagnosis instrument provided in this application; Figure 8 This is an enlarged cross-sectional view of part of the structure at the guide rod of the bearing fault diagnosis instrument provided in this application.

[0024] Indicated in the figure: Body 1, frame 2, sampling mechanism 3, annular member 4, connecting member 5, connecting shaft 6, top block 7, top plate 8, bearing to be tested 9, inner plate 101, eccentric wheel 102, first rotating shaft 103, outer gear 104, second rotating shaft 105, center wheel 106, worm wheel 107, third rotating shaft 108, worm 109, first bevel gear 110, drive shaft 111, second bevel gear 112, turntable 113, guide rod 201, annular plate 202, elastic member 203, limit ring 204, magnet 301, support rod 302, electromagnet 303, power supply 304. DETAILED DESCRIPTION

[0025] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0026] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings.

[0027] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features and technical solutions therein can be combined with each other. It should be noted that similar numbers and letters represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Example

[0028] Please refer to Figure 1-Figure 8 A bearing fault diagnostic instrument includes a body 1, a frame 2 is fixedly mounted on the body 1, a plurality of sampling mechanisms 3 are mounted on the frame 2, the sampling mechanisms 3 are electrically connected to the body 1 and are used for data sampling of the body 1, a ring member 4 is provided at the lower end of the frame 2, a connecting member 5 is fixed at the upper end of the ring member 4, a connecting shaft 6 is fixedly mounted at the upper end of the frame 2, the lower end of the connecting shaft 6 is rotatably mounted on the connecting member 5, a plurality of top blocks 7 distributed in a circular array are arranged inside the ring member 4, an adjusting mechanism is arranged on the ring member 4, the adjusting mechanism cooperates with the plurality of top blocks 7 and fixes the bearings outside the ring member 4, and the adjusting mechanism is used to adjust the positions of the plurality of top blocks 7 and can fix bearings of different specifications.

[0029] The working diagram of the device can be referred to Figure 2As shown, the bearing 9 to be tested is sleeved outside the multiple top blocks 7, and the multiple top blocks 7 are driven by the adjustment mechanism to move toward the inner wall of the bearing 9 to be tested. The multiple top blocks 7 apply extrusion force to the bearing 9 to be tested, and the bearing 9 to be tested is fixed outside the ring member 4 and moves synchronously with the ring member 4. By driving the bearing 9 to be tested to move and simulate work, the sampling mechanism 3 on the frame 2 is cooperated to sample the bearing in the working state, and the body 1 analyzes and processes the sampled data.

[0030] Among them, a top plate 8 is sleeved and fixedly installed on the outer side of the upper end of the ring part 4, and a downward pressure mechanism is installed on the top plate 8. The downward pressure mechanism is used to apply downward pressure to the bearing outside the ring part 4. The sampling mechanism 3 includes a thermal imaging sensor, a vibration sensor and a noise sensor. The sampling mechanism 3 is used to sample the temperature parameters, vibration and noise parameters of the bearing.

[0031] Among them, the surface of the top block 7 is provided with anti-skid lines, and the bearings 9 to be tested are sleeved outside the top blocks 7. There is a large friction between the top blocks 7 and the bearings 9, and it is not easy to slip between the bearings 9 to be tested and the top blocks 7, thereby improving the stability of the bearings 9 to be tested when they are fixed. Rollers are installed at the four corners of the bottom of the body 1 to facilitate the pushing device to move to different positions.

[0032] Among them, the adjustment mechanism includes an inner plate 101 arranged in the ring member 4, and a plurality of eccentric wheels 102 distributed in a circular array are arranged in the ring member 4. The outer surfaces of the eccentric wheels 102 are respectively in contact with the top blocks 7. The eccentric positions of the eccentric wheels 102 are fixedly installed with a first rotating shaft 103. The upper ends of the first rotating shafts 103 are rotatably installed on the inner plate 101, and the upper ends of the first rotating shafts 103 are fixedly installed with external gears 104. The adjusting mechanism also includes a second rotating shaft 105 rotatably mounted on the inner plate 101, a center wheel 106 is fixedly mounted on the second rotating shaft 105, the center wheel 106 is meshed with multiple outer gears 104 on the outside, a worm gear 107 is fixedly mounted on the upper end of the second rotating shaft 105, a third rotating shaft 108 is rotatably mounted in the ring member 4, a worm 109 is fixedly mounted on the third rotating shaft 108, the worm 109 is meshed with the worm gear 107 and the transmission between the two is self-locking, a first bevel gear 110 is fixedly mounted on one end of the third rotating shaft 108, a driving shaft 111 is rotatably mounted on the ring member 4, a second bevel gear 112 is fixedly mounted on the lower end of the driving shaft 111, the second bevel gear 112 is meshed with the first bevel gear 110, and a turntable 113 is fixedly mounted on the upper end of the driving shaft 111.

[0033] The working diagram of the device can be referred to Figure 2As shown, the bearing 9 to be tested is sleeved outside the multiple top blocks 7, and the multiple top blocks 7 are driven by the adjustment mechanism to move toward the inner wall of the bearing 9 to be tested. The multiple top blocks 7 apply extrusion force to the bearing 9 to be tested, and the bearing 9 to be tested is fixed outside the ring member 4 and moves synchronously with the ring member 4. By driving the bearing 9 to be tested to move and simulate work, the sampling mechanism 3 on the frame 2 is cooperated to sample the bearing in the working state, and the body 1 analyzes and processes the sampled data.

[0034] The above scheme further drives the driving shaft 111 to rotate by rotating the turntable 113, and the driving shaft 111 drives the third rotating shaft 108 to rotate through the transmission action of the second bevel gear 112 and the first bevel gear 110, and the worm 109 on the third rotating shaft 108 rotates and drives the worm wheel 107 to rotate, and the worm wheel 107, the rotating shaft 105 and the center wheel 106 rotate synchronously, and the center wheel 106 drives the outer outer gear 104 to rotate synchronously, and the outer gear 104, the first rotating shaft 103 and the eccentric wheel 102 rotate synchronously, and the eccentric wheel 102 rotates and pushes the top block 7 to move, and the top block 7 moves outward and applies an extrusion force to the inner wall of the bearing 9 to be detected. Due to the different specifications of the bearing 9 to be detected, the distance between the inner wall of the bearing 9 to be detected and the top block 7 is also different. The position of the top block 7 in the device is adjustable, so that bearings 9 to be detected of different specifications can be fixed, so that the device can be suitable for bearings 9 to be detected of different specifications. The device can be used for bearings to be tested of different specifications, suitable for various industrial fields and different types of mechanical equipment, and has strong versatility and applicability.

[0035] During the measurement process, by rotating the connector 5 and making the connector 5 rotate around the connecting shaft 6, the annular member 4 is driven to rotate around the connecting shaft 6, and the bearing 9 to be tested on the outside of the annular member 4 can be rotated synchronously, thereby driving the bearing 9 to be tested to rotate and adjusting the relative position between the bearing and the sampling mechanism 3. The sampling mechanism 3 can sample different positions of the bearing, and by sampling multiple positions of the bearing, more comprehensive and accurate parameter information such as vibration and temperature can be obtained. This information helps to more accurately determine the operating status and fault type of the bearing and improve the accuracy of fault diagnosis. The device can capture the fault characteristics of the bearing in different states, so as to have a more comprehensive understanding of the health status of the bearing. Example

[0036] The bearing fault diagnostic instrument provided in Example 1 is further optimized, specifically, as follows: Figure 4-Figure 8As shown, the pressing mechanism includes a plurality of guide rods 201 distributed in a circular array, the guide rods 201 are configured in a sleeve shape, the guide rods 201 pass through the top plate 8, the lower end of the top plate 8 is provided with an annular plate 202 sleeved outside the annular member 4, the lower end of the guide rods 201 is fixed on the annular plate 202, the guide rods 201 are sleeved with elastic members 203, the two ends of the elastic members 203 are respectively fixedly connected to the top plate 8 and the annular plate 202, and the upper ends of the guide rods 201 are fixedly installed with limit rings 204.

[0037] The pressing mechanism further includes a pressurizing component, which is mounted on the top plate 8 and is used to apply a repulsive force to the annular plate 202. The pressurizing component includes a plurality of magnets 301, which are respectively located in the guide rods 201 and fixed on the annular plate 202. A plurality of support rods 302 are fixedly mounted on the top plate 8, one end of each support rod 302 extends into the guide rods 201, and an electromagnet 303 is fixedly mounted on each end of each support rod 302. The electromagnet 303 will not hinder the guide rod 201 from moving up and down. A plurality of power supplies 304 are fixedly mounted on the top plate 8, and the power supplies 304 are respectively electrically connected to the electromagnets 303 and are used to supply power to the electromagnets 303.

[0038] The above scheme is further improved by energizing the electromagnet 303, which applies a repulsive force to the magnet 301, and the magnet 301 and the annular plate 202 move downward synchronously, and the annular plate 202 applies downward pressure to the bearing below it, so that the bearing is under pressure, and then the bearing is sampled by the sampling mechanism 3, so that the performance of the bearing under specific load conditions can be measured. At the same time, by controlling the magnetic force of the electromagnet 303, the pressure of the bearing can be adjusted accordingly, and the performance of the bearing under different load conditions can be measured. By measuring the bearing under different load conditions, more comprehensive and accurate bearing performance data can be obtained. These data help to more accurately determine the operating status and fault type of the bearing under different working conditions, thereby improving the accuracy of fault diagnosis.

[0039] The bearing fault diagnostic instrument designed by the present invention has the following working principles: First, the bearing 9 to be tested is sleeved outside the multiple top blocks 7, and the multiple top blocks 7 are driven by the adjustment mechanism to move toward the inner wall of the bearing 9 to be tested. The multiple top blocks 7 apply extrusion force to the bearing 9 to be tested, and the bearing 9 to be tested is fixed outside the ring member 4 and moves synchronously with the ring member 4. By driving the bearing 9 to be tested to move and simulate the work, the sampling mechanism 3 on the frame 2 is used to sample the bearing in the working state, and the body 1 analyzes and processes the sampled data. The sampling mechanism 3 includes a thermal imaging sensor, a vibration sensor and a noise sensor. The sampling mechanism 3 is used to sample the temperature parameters, vibration and noise parameters of the bearing.

[0040] Furthermore, the drive shaft 111 is driven to rotate by rotating the turntable 113, and the drive shaft 111 drives the third shaft 108 to rotate through the transmission action of the second bevel gear 112 and the first bevel gear 110, the worm 109 on the third shaft 108 rotates and drives the worm wheel 107 to rotate, the worm wheel 107, the shaft 105 and the center wheel 106 rotate synchronously, the center wheel 106 drives the outer outer gear 104 to rotate synchronously, the outer gear 104, the first shaft 103 and the eccentric wheel 102 rotate synchronously, the eccentric wheel 102 rotates and pushes the top block 7 to move, the top block 7 moves outward and applies an extrusion force to the inner wall of the bearing 9 to be detected, due to the different specifications of the bearing 9 to be detected, the distance between the inner wall of the bearing 9 to be detected and the top block 7 is also different, the position of the top block 7 in the device is adjustable, so that bearings 9 to be detected of different specifications can be fixed.

[0041] Secondly, during the measurement process, by rotating the connecting member 5 and causing the connecting member 5 to rotate around the connecting shaft 6, the annular member 4 is driven to rotate around the connecting shaft 6, and the bearing 9 to be tested on the outside of the annular member 4 can be rotated synchronously, thereby driving the bearing 9 to be tested to rotate and adjusting the relative position between the bearing and the sampling mechanism 3, and the sampling mechanism 3 can perform sampling work on different positions of the bearing. By energizing the electromagnet 303, the electromagnet 303 applies a repulsive force to the magnet 301, and the magnet 301 and the annular plate 202 move downward synchronously. The annular plate 202 applies downward pressure to the bearing below it, and the bearing is in a pressure-bearing state. Then, the sampling mechanism 3 performs sampling work on the bearing, and the performance of the bearing under specific load conditions can be measured. At the same time, by controlling the magnetic force of the electromagnet 303, the pressure bearing size of the bearing can be adjusted accordingly, and the performance of the bearing under different load conditions can be measured.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] Obviously, the embodiments described above are only some embodiments of the present invention, rather than all embodiments. The preferred embodiments of the present invention are given in the accompanying drawings, but they do not limit the patent scope of the present invention. The present invention can be implemented in many different forms. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive. Although the present invention has been described in detail with reference to the aforementioned embodiments, for those skilled in the art, it is still possible to modify the technical solutions recorded in the aforementioned specific embodiments, or to perform equivalent replacements for some of the technical features therein. Any equivalent structure made using the contents of the specification and drawings of the present invention, directly or indirectly used in other related technical fields, is also within the scope of patent protection of the present invention.

Claims

1. A bearing fault diagnostic instrument, comprising a body (1), characterized in that: A frame (2) is fixedly mounted on the machine body (1), a plurality of sampling mechanisms (3) are mounted on the frame (2), and the sampling mechanisms (3) are electrically connected to the machine body (1) and are used for data sampling of the machine body (1); The lower end of the frame (2) is provided with an annular member (4), the upper end of the annular member (4) is fixed with a connecting member (5), the upper end of the frame (2) is fixedly mounted with a connecting shaft (6), the lower end of the connecting shaft (6) is rotatably mounted on the connecting member (5), a plurality of top blocks (7) distributed in a circumferential array are provided inside the annular member (4), an adjusting mechanism is provided on the annular member (4), the adjusting mechanism cooperates with the plurality of top blocks (7) and fixes the bearings outside the annular member (4), and the adjusting mechanism is used to adjust the positions of the plurality of top blocks (7) so as to fix bearings of different specifications; A top plate (8) is sleeved and fixedly mounted on the outer side of the upper end of the annular member (4), and a downward pressing mechanism is mounted on the top plate (8), and the downward pressing mechanism is used to apply downward pressure to the bearing outside the annular member (4).

2. A bearing fault diagnostic instrument according to claim 1, characterized in that: The sampling mechanism (3) comprises a thermal imaging sensor, a vibration sensor and a noise sensor, and the sampling mechanism (3) is used to sample the temperature parameters, vibration and noise parameters of the bearing.

3. A bearing fault diagnostic instrument according to claim 1, characterized in that: The surface of the top block (7) is provided with anti-slip textures.

4. A bearing fault diagnostic instrument according to claim 1, characterized in that: The adjustment mechanism comprises an inner plate (101) arranged in an annular member (4), a plurality of eccentric wheels (102) arranged in a circumferential array in the annular member (4), outer surfaces of the eccentric wheels (102) respectively contacting the top blocks (7), first rotating shafts (103) being fixedly mounted at eccentric locations on the eccentric wheels (102), the upper ends of the first rotating shafts (103) being rotatably mounted on the inner plate (101), and the upper ends of the first rotating shafts (103) being fixedly mounted with external gears (104).

5. A bearing fault diagnostic instrument according to claim 4, characterized in that: The adjustment mechanism further comprises a second rotating shaft (105) rotatably mounted on the inner plate (101); a center wheel (106) is fixedly mounted on the second rotating shaft (105); the center wheel (106) meshes with a plurality of outer gears (104) on the outside; a worm wheel (107) is fixedly mounted on the upper end of the second rotating shaft (105); a third rotating shaft (108) is rotatably mounted in the annular member (4); a worm (109) is fixedly mounted on the third rotating shaft (108); the worm (109) meshes with the worm wheel (107), and the transmission between the two has a self-locking property.

6. A bearing fault diagnostic instrument according to claim 5, characterized in that: A first bevel gear (110) is fixedly mounted on one end of the third rotating shaft (108); a driving shaft (111) is rotatably mounted on the annular member (4); a second bevel gear (112) is fixedly mounted on the lower end of the driving shaft (111); the second bevel gear (112) is meshed with the first bevel gear (110); and a rotating disk (113) is fixedly mounted on the upper end of the driving shaft (111).

7. A bearing fault diagnostic instrument according to claim 1, characterized in that: The pressing mechanism comprises a plurality of guide rods (201) distributed in a circumferential array, the guide rods (201) being arranged in a sleeve shape, the guide rods (201) penetrating the top plate (8), the lower end of the top plate (8) being provided with an annular plate (202) sleeved outside the annular member (4), the lower ends of the guide rods (201) being fixed on the annular plate (202), the guide rods (201) being sleeved with elastic members (203), the two ends of the elastic members (203) being respectively fixedly connected to the top plate (8) and the annular plate (202), and the upper ends of the guide rods (201) being fixedly mounted with limit rings (204).

8. A bearing fault diagnostic instrument according to claim 7, characterized in that: The pressing mechanism further comprises a pressing component, the pressing component being mounted on the top plate (8), and the pressing component being used to apply a repulsive force to the annular plate (202).

9. A bearing fault diagnostic instrument according to claim 8, characterized in that: The pressurizing assembly comprises a plurality of magnets (301), the magnets (301) are respectively located in the guide rods (201) and fixed on the annular plate (202), a plurality of support rods (302) are fixedly mounted on the top plate (8), one end of each support rod (302) extends into the guide rods (201), and an electromagnet (303) is fixedly mounted on the end of each support rod (302), the electromagnet (303) will not hinder the guide rod (201) from moving up and down, and a plurality of power supplies (304) are fixedly mounted on the top plate (8), the power supplies (304) are respectively electrically connected to the electromagnets (303), and the power supplies (304) are used to supply power to the electromagnets (303).

10. A bearing fault diagnostic instrument according to claim 1, characterized in that: Rollers are installed at the four corners of the bottom of the machine body (1).

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