Bearing running roundness fluctuation detection device and detection method

Abstract

The present invention relates to the field of detection technology, and specifically to a bearing operation roundness fluctuation detection device and detection method. The bearing operation roundness fluctuation detection device comprises: a detection frame, fixedly mounted on a working base, and the detection frame is used for support and installation. A clamping member, mounted on the working base, and the clamping member is used to clamp the placed bearing, so as to fix the outer ring of the bearing to be detected. A rotating detection member is mounted on the detection frame, and is used to be inserted into the inner ring of the placed bearing, and rotate the inner ring of the bearing by rotation. A tension sensor, which is used to sense the deflection centrifugal force F of the rotating detection member. A controller, the controller is used to control the clamping member to fix the outer ring of the bearing, the rotating detection member to perform detection, and obtain the deflection centrifugal force F through the tension sensor. This method can be used to determine whether the fluctuation within the radial pressure bearing capacity of the bearing is qualified, has strong evaluation capabilities, and is suitable for the bearing use environment.

Description

Technical Field

[0001] The present invention relates to the field of detection technology, and in particular to a bearing running roundness fluctuation detection device and a detection method. Background Art

[0002] Bearings are an important component in mechanical engineering, mainly used to support and limit rotational torque or motion friction. Its main function is to reduce friction loss, reduce wear, and protect machine parts from damage. There are many types of bearings, which can be divided into many types according to working environment, working principle, material and other factors. Common bearings include ball bearings, deep groove ball bearings, cylindrical roller bearings, self-aligning ball bearings, angular contact ball bearings, thrust ball bearings, needle roller bearings, etc. The main structure of the bearing includes inner ring, outer ring, rolling element, cage and sealing ring. Among them, the rolling element is responsible for bearing and dispersing radial and axial loads; the cage keeps the rolling element on the predetermined track during operation; the sealing ring is used to prevent the leakage of lubricating media and the intrusion of pollutants. The working principle of the bearing is mainly to reduce friction loss by rolling the rolling element. During the rolling process, due to the cooperation between the inner ring and the outer ring, the rolling element will constantly change the trajectory of motion, so that it is always in the best state, thereby achieving the purpose of reducing friction loss. The use of bearings is wide, covering various types of machinery and equipment, such as automobiles, motorcycles, trains, ships, airplanes, machine tools, motors, household appliances, etc.

[0003] The detection of bearing strength refers to the testing of the mechanical properties of the bearing to evaluate its key indicators such as load-bearing capacity, stiffness, and durability to ensure its reliability and safety during use. The following are several commonly used bearing strength detection methods: Tensile and compression test: By applying a certain axial load to the bearing, its ability to resist damage is measured. This method can evaluate the bearing's ability to resist fatigue and tension. Bending test: By loading the maximum bending stress to the bearing, its bending deformation and fatigue life are checked. Impact test: Simulate the impact load that may occur in actual applications to check the impact resistance of the bearing. High temperature experiment: Simulate the high temperature conditions that the bearing may encounter during actual use to check its thermal stability and oxidation resistance. All of the above test methods can evaluate the strength of the bearing from different angles, but the specific test steps and methods will vary depending on the type of bearing and the use environment. At the same time, in order to ensure the accuracy of the test results, it is also necessary to select appropriate test equipment and environment.

[0004] Most existing detection devices detect the axial pressure of the bearing, but the radial fluctuation of the bearing is also an evaluation item that affects the use of the bearing, and the existing equipment does not have an effective detection method. Summary of the invention

[0005] In order to solve the above technical problems, the present invention provides a bearing running roundness fluctuation detection device, which is used to detect the bearing and the fluctuation of the bearing during operation. The bearing running roundness fluctuation detection device comprises:

[0006] The working base is used to form a support platform. The upper surface of the working base is a horizontal structure, so as to ensure that the axis of the bearing can be perpendicular to the horizontal plane during the detection process, avoiding detection interference caused by the gravity of the bearing itself during the detection process. Support legs are fixedly set at the four corners of the bottom of the working base. The bottom of the support leg can be fixedly connected to the floor of the workshop. The support leg can be welded to the ground, or fixedly connected to the gasket at the bottom of the support leg. The gasket is provided with a mounting hole. The support leg can be fixed to the ground by passing the mounting bolt through the mounting hole, thereby completing the horizontal support installation of the working base. Since the horizontal requirements of the working base are relatively high, the working base can also be installed on a horizontal air cushion device. The horizontal air cushion device is a prior art.

[0007] The detection frame is fixedly mounted on the work base, and is used for support and installation. The detection frame can be a gantry structure or a tripod structure, etc. The specific details will not be repeated here. The specific settings can be set according to the actual production line conditions and operating conditions.

[0008] The clamping member is installed on the work base and is used to clamp the placed bearing, so as to fix the outer ring of the bearing to be tested. The clamping member clamps at least from both sides of the bearing, and the clamping points can be two, three, etc., among which three is preferred. The three clamping points can be distributed on the periphery of the bearing, and can be evenly arranged on the periphery of the bearing and distributed radially.

[0009] The rotation detection member is installed on the detection frame, and is used to be inserted into the inner ring of the bearing, and rotate the inner ring of the bearing by rotating. The rotation detection member can be a combination structure of a telescopic rotating rod and a motor, and the motor is installed on the detection frame. The telescopic rotating rod is vertically connected to the detection frame, and the motor output shaft is coaxially fixedly connected to the telescopic rotating rod. The lower end of the telescopic rotating rod can be embedded in the inner ring of the bearing. When the bearing is tested, the lower end of the telescopic rotating rod is embedded and fixed to the inside of the fixed inner ring of the bearing.

[0010] The tension sensor is used to sense the deflection centrifugal force F of the rotating detection member. Specifically, it can be connected to the centrifugal member to sense the pressure exerted on the centrifugal member. When the centrifugal member is subjected to the centrifugal force, the tension sensor can sense the tension.

[0011] The controller is used to fix the outer ring of the bearing to be tested through a clamping member; the rotating detection member is embedded in the inner ring of the bearing and fixed; the rotating detection member is controlled to increase the output angular velocity ω at a preset growth rate; the centrifugal force F is obtained by real-time detection through a tension sensor until the output angular velocity of the detection drive member reaches a preset maximum angular velocity ω m ; Control the rotating detection member to release the inner ring of the bearing, and the clamping member to release the outer ring of the bearing; construct a plane coordinate system, the horizontal coordinate of the plane coordinate system is the angular velocity ω, and the vertical coordinate is the tension; and construct a fluctuation curve ω-F through the angular velocity ω of the rotating detection member and the centrifugal force sensed by the tension sensor, and then obtain a fitting curve ω-F' through the fluctuation curve; calculate the fluctuation degree B of the bearing, and determine whether the fluctuation degree B is greater than a preset standard fluctuation degree B 标 If yes, it is judged as unqualified, if no, it is judged as qualified.

[0012] Preferably: the clamping member may specifically include a feed drive member, a drive harpoon, and a clamping fork rod. The feed drive member may be a hydraulic rod, an electric telescopic rod, etc., which will not be described in detail here. The feed drive member is fixedly mounted on the working base, and may be arranged parallel to the upper surface of the working base. The drive harpoon is slidably arranged on the working base, and the drive harpoon may be a fork-shaped structure. There are three clamping points in this embodiment, and the drive harpoon here is a three-pronged structure. The middle of the drive harpoon is directly slidably embedded in the detection frame, and is directly fixedly connected with a clamping fork rod. The two sides of the drive harpoon are slidably embedded in the detection frame, and the clamping fork rod is slidably embedded in the interior of the detection frame. The sliding directions of the three clamping fork rods intersect at the center of the placement point of the bearing. The drive harpoons on both sides are provided with tooth patterns, and the corresponding clamping fork rods are provided with tooth patterns. The transmission structure is used for transmission between the clamping fork rod and the drive harpoon. The clamping end of the clamping fork rod needs to be matched with the outer surface of the bearing to clamp it, so as to avoid the bearing being subjected to external force changes during the detection process.

[0013] Preferably: the transmission structure can be a gear or a gear set composed of gears of different diameters. The gear set can include two gears, namely gear A and gear B. The two gears are coaxially fixedly connected and rotatably connected inside the detection frame. Gear A and gear B are respectively meshed with the teeth on the driving harpoon and the clamping fork rod. The radius ratio of gear A and gear B can be Where v1 and v2 are the sliding speeds of the middle clamping fork rod and the two side clamping fork rods, respectively. In actual operation, the sliding speed of the clamping fork rods on both sides needs to be greater than the sliding speed of the middle clamping fork rod, so that clamping and releasing can be performed quickly, providing space for the bearing placement operation. The three clamping fork rods need to clamp and release the bearing at the same time. The specific implementation requires adjusting the length of the clamping fork rods, which will not be described in detail here.

[0014] Preferably: when the placement level of the work platform cannot be guaranteed, a level adjustment member is provided under the placement platform, and the structure of the level adjustment member is diverse, which may include: three adjustment bolts, which are threaded through the work platform, the upper ends of the adjustment bolts are evenly connected to the bottom of the placement platform, and the lower ends of the adjustment bolts are provided with adjustment handles, which may be multi-faceted rods, etc., and the level of the placement platform can be adjusted by adjusting the bolts. The upper surface of the placement platform may also be provided with a level meter, which is used to indicate the level of the placement platform.

[0015] Preferably: the rotating detection member may also include: a detection drive member, the detection drive member is fixedly mounted on the detection frame, the detection drive member may be a motor with adjustable rotation speed, the output shaft of the detection drive member is perpendicular to the plane where the bearing is placed, that is, the working base or the upper surface of the placement table. A screw rod is coaxially fixedly connected to the output shaft of the detection drive member, and a friction sleeve is fixedly connected to the detection frame, and a screw rod sleeve is nested inside the friction sleeve and can be raised and lowered. There is friction between the screw rod sleeve and the friction sleeve. At this time, a friction layer or axial anti-rotation stripes may be provided on the surface of the screw rod sleeve, and the details are not repeated here. The lower end of the screw rod is threadedly embedded in the interior of the screw rod sleeve, and the friction force between the screw rod sleeve and the friction sleeve is greater than the friction force between the screw rod sleeve and the screw rod. An expansion member is provided at the lower end of the screw rod sleeve, and an embedding groove is provided on the outer wall of the screw rod sleeve, and a centrifugal member is provided inside the embedding groove, and the centrifugal member can slide out of the embedding groove when subjected to centrifugal force. The centrifugal part can be a counterweight block and a rotating rod structure, the rotating rod is rotatably connected to the inside of the embedded groove, and when the centrifugal part is embedded in the embedded groove, the centrifugal part can form an arc surface structure that matches the outer periphery of the screw sleeve with the embedded groove.

[0016] Preferably: a rotating sleeve may be provided on the outer periphery of the upper end of the screw sleeve, and when the rotating sleeve is embedded in the friction sleeve, the screw sleeve can rotate freely inside the friction sleeve. Under the drive of the detection drive, the screw rotates with the output shaft of the detection drive, because the friction between the screw sleeve and the friction sleeve is greater than the friction between the screw and the screw sleeve. The screw sleeve cannot rotate inside the friction sleeve. Under the rotation of the screw, the screw sleeve slides axially downward inside the friction sleeve, and the expansion piece descends with the screw sleeve. When the expansion piece is embedded in the inner ring of the bearing, the expansion piece cannot be lowered, and the screw can drive the inner ring of the bearing to rotate. The centrifugal force of the centrifugal piece can be sensed by the tension sensor. When the expansion piece is embedded in the inner ring of the bearing, the rotating sleeve enters the friction sleeve at this time, and the screw sleeve cannot be axially lifted or lowered at this time, and the screw sleeve can rotate with the screw. When the bearing needs to be released, it is necessary to manually drag the screw sleeve to separate the rotating sleeve from the friction sleeve. In this way, the friction between the screw sleeve and the friction sleeve can be greatly reduced, making the detection smoother. The expansion member may include an arc-shaped piece, a connecting rod, a table-shaped rod and a support rod. There are a plurality of arc-shaped pieces, which are radially slidably arranged at the bottom of the screw sleeve, and the cylinder formed by the screw sleeve and the plurality of arc-shaped pieces needs to be coaxially arranged. The number of arc-shaped pieces can be set in three groups as appropriate. The arc-shaped piece is located at the periphery of the axis of the screw sleeve, and the table-shaped rod and the support rod are axially slidably nested inside the arc-shaped piece. The support rod is coaxially fixedly connected to the upper and lower ends of the table-shaped rod, and the upper end of the support rod is axially slidably nested in the bottom of the screw sleeve, and the lower end of the support rod extends out of the arc-shaped piece. The radius of the upper end of the table-shaped rod is smaller than the radius of the lower end. A plurality of sliding drive grooves are provided on the oblique arc surface of the table-shaped rod, and the number of the sliding drive grooves is consistent with the number of arc-shaped pieces. A connecting rod is fixedly connected to the inner arc surface of the arc-shaped piece, and the connecting rod is slidably nested inside the sliding drive groove. When the screw sleeve descends, the support rod and the arc piece are inserted into the inner ring of the bearing. At this time, the support rod contacts the table top of the placement table or the work base. The screw sleeve continues to descend, and the support rod moves axially relative to the arc piece. Since the arc piece cannot slide axially on the screw sleeve, the connecting rod is pushed outward by the movement of the table rod, so that the arc piece slides radially outward to complete the expansion, thereby completing the fixed support of the bearing. When the screw sleeve is lifted, the support rod loses support. Under the action of gravity, the support rod descends and drives the arc piece closer, thereby completing the release of the bearing. This structure can achieve corresponding structural linkage coordination through the bearing during the detection process, so that each structure is consistent with the operation process and the organic coordination of the structure is achieved, realizing automatic expansion support and release, and achieving automatic operation of the machine.

[0017] Preferably: the placement table is rotatably designed with a rotating protrusion. When the expansion piece is embedded in the inner ring of the bearing, the support rod contacts the rotating protrusion. When the support rod rotates with the inner ring of the bearing, the setting of the rotating protrusion reduces the friction of the rotation of the inner ring of the bearing, making the bearing detection smoother and more accurate.

[0018] Preferably: the maximum angular velocity where F m is the bearing capacity, which can be determined by the maximum bearing capacity of the bearing. The details are not described here. M is the mass of the centrifugal part, which can be obtained through the equipment parameters. L is the length of the rotating rod or the pull wire connected to the centrifugal part. θ is the angle between the centrifugal part and the axis of the screw sleeve. Due to the high rotation speed of the screw sleeve, θ here is infinitely close to 90°, which can be understood as

[0019] Preferred: The degree of fluctuation Where F is the ordinate value of the fluctuation curve, F' is the ordinate value of the fitting curve, and ω' is the coordinate value of the end point of the characterization segment. In the actual detection process, the value is generally taken as ω m By default, the fluctuation is qualified when it is close to the maximum angular velocity, and it is qualified when it is less than the maximum angular velocity. a is the length of the characterization segment.

[0020] The present invention also proposes a bearing running roundness fluctuation detection method, comprising the following steps:

[0021] S1. Fix the outer ring of the bearing to be tested by means of a clamp.

[0022] S2. The rotating detection part is embedded in the inner ring of the bearing and fixed.

[0023] S3, controlling the rotating detection member to increase the output angular velocity ω at a preset growth rate.

[0024] S4. The centrifugal force F is obtained by real-time detection through the tension sensor until the output angular velocity of the detection drive reaches a preset maximum angular velocity ω. m .

[0025] S5. Control the rotating detection part to release the inner ring of the bearing, and the clamping part to release the outer ring of the bearing.

[0026] S6. Construct a plane coordinate system, wherein the horizontal coordinate of the plane coordinate system is the angular velocity ω, and the vertical coordinate is the tension.

[0027] S7, and construct a fluctuation curve ω-F through the angular velocity ω of the rotating detection member and the centrifugal force sensed by the tension sensor, and then obtain a fitting curve ω-F' through the fluctuation curve.

[0028] S8. Calculate the fluctuation degree of the bearing Where F is the ordinate value of the fluctuation curve, F' is the ordinate value of the fitting curve, ω' is the coordinate value of the end point of the characterization segment, and a is the length of the characterization segment.

[0029] S9. Determine whether the fluctuation degree B is greater than a preset standard fluctuation degree B. 标If yes, it is judged as unqualified, if no, it is judged as qualified.

[0030] Technical effects and advantages of the present invention: The present invention can evaluate the stability of the bearing operation by judging whether the fluctuation within the radial pressure bearing capacity of the bearing is qualified, and has strong evaluation ability. The evaluation of this application is limited to centrifugal force, and other interfering forces are relatively small, and will not be interfered by external forces, so the evaluation is more objective. This application is connected by a screw and a screw sleeve. When the axial overlap is small, the interference to the centrifugal force is small, which is suitable for the use scenario of the bearing. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a schematic diagram of the three-dimensional structure of a bearing running roundness fluctuation detection device proposed by the present invention.

[0032] Figure 2 This is a schematic diagram of the top view of the structure of a bearing running roundness fluctuation detection device proposed by the present invention.

[0033] Figure 3 The present invention is a three-dimensional schematic diagram of a rotating detection component in a bearing running roundness fluctuation detection device proposed by the present invention.

[0034] Figure 4 The present invention is a schematic diagram of the internal structure of a screw sleeve in a bearing running roundness fluctuation detection device proposed by the present invention.

[0035] Figure 5 The present invention is a schematic structural diagram of a steering transmission in a bearing running roundness fluctuation detection device proposed by the present invention.

[0036] Figure 6 This is a detection flow chart of a bearing running roundness fluctuation detection method proposed by the present invention.

[0037] Explanation of the accompanying drawings: working base 1, feeding drive member 2, driving harpoon 3, clamping fork rod 4, detection frame 5, detection drive member 6, rotating detection member 7, friction sleeve 8, rotating protrusion 9, controller 10, placing table 11, screw 12, screw sleeve 13, rotating sleeve 14, centrifugal member 15, tension sensor 16, embedded groove 17, expansion member 18, arc sheet 20, connecting rod 21, sliding drive groove 22, table rod 23, support rod 24, transmission structure 25. DETAILED DESCRIPTION

[0038] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0039] Example 1

[0040] refer to Figure 1-Figure 2 In this embodiment, a bearing running roundness fluctuation detection device is proposed, which is used to detect the bearing and its fluctuation during operation. The bearing running roundness fluctuation detection device includes:

[0041] The working base 1 is used to form a support platform. The upper surface of the working base 1 is a horizontal structure, so as to ensure that the axis of the bearing can be perpendicular to the horizontal plane during the detection process, avoiding detection interference caused by the gravity of the bearing itself during the detection process. The shape of the working base 1 can be designed according to the actual use situation. It can be a circular table with a notch, or a rectangle, etc., depending on the installation and use situation. Support legs are fixedly set at the four corners of the bottom of the working base 1. The bottom of the support leg can be fixedly connected to the floor of the workshop. The support leg can be welded to the ground, or it can be fixedly connected to the gasket at the bottom of the support leg. The gasket is provided with a mounting hole. The support leg can be fixed to the ground by passing the mounting bolt through the mounting hole, thereby completing the horizontal support installation of the working base 1. Since the horizontal requirements of the working base 1 are relatively high, the working base 1 can also be installed on a horizontal air cushion device. The horizontal air cushion device is a prior art and will not be described in detail here.

[0042] The detection frame 5 is fixedly mounted on the working platform 1 for support and installation. The detection frame 5 can be a gantry structure or a tripod structure, etc. The specifics will not be described here one by one. The specific settings can be set according to the actual production line conditions and operating conditions. For example, if the bearing is placed by a manipulator, the angle of the side of the detection frame 5 facing the operation can be set larger. At this time, the detection frame 5 is preferably a gantry structure. If the structure of the detection frame 5 is required to be stable, the detection frame 5 and the working platform 1 can have multiple mounting fulcrums, which will not be described here one by one.

[0043] The clamping member is installed on the working base 1, and is used to clamp the placed bearing, so as to fix the outer ring of the bearing to be tested. The clamping member clamps at least from both sides of the bearing, and the clamping points can be two, three, etc., among which three is preferred. The three clamping points can be distributed on the periphery of the bearing, and can be evenly distributed on the periphery of the bearing and radially distributed. The specific clamping member may include a feed drive 2, a drive harpoon 3, a clamping fork rod 4 and a placement table 11. The feed drive 2 may be a hydraulic rod, an electric telescopic rod, etc., and the details are not repeated here. The feed drive 2 is fixedly installed on the working base 1, and it can be arranged parallel to the upper surface of the working base 1. The drive harpoon 3 is slidably arranged on the working base 1, and the drive harpoon 3 can be a fork-shaped structure. There are three clamping points in this embodiment, so the driving harpoon 3 here is a three-pronged structure. The middle of the driving harpoon 3 is directly slidably embedded in the detection frame 5, and is directly fixedly connected with a clamping fork rod 4. The two sides of the driving harpoon 3 are slidably embedded in the detection frame 5, and the clamping fork rod 4 is slidably embedded in the inside of the detection frame 5. The sliding directions of the three clamping fork rods 4 intersect at the center of the bearing placement point. The driving harpoons 3 on both sides are provided with teeth, and the corresponding clamping fork rods 4 are provided with teeth. The transmission structure 25 is used to transmit the power between the clamping fork rod 4 and the driving harpoon 3. Figure 5 The transmission structure 25 can be a gear or a gear set composed of gears of different diameters. The gear set can include two gears, namely gear A and gear B. The two gears are coaxially fixedly connected and rotatably connected inside the detection frame 5. Gear A and gear B are respectively meshed with the teeth on the driving harpoon 3 and the clamping fork rod 4. The radius ratio of the gear A and the gear B can be Among them, v1 and v2 are the sliding speeds of the clamping fork rod 4 in the middle and the clamping fork rods 4 on both sides, respectively. In actual operation, the sliding speed v2 of the clamping fork rods 4 on both sides needs to be greater than the sliding speed v1 of the clamping fork rod 4 in the middle, so that clamping and releasing can be performed quickly, providing space for the operation of placing the bearing. The three clamping fork rods 4 need to clamp and release the bearing at the same time. The specific implementation requires adjusting the length of the clamping fork rods 4, which will not be described in detail here. The clamping end of the clamping fork rod 4 needs to be clamped in accordance with the outer surface of the bearing to avoid the bearing being subjected to external force changes during the detection process. Of course, the clamping member can also be other structures, which will not be described one by one here. A placement table 11 can be provided on the work base 1, and the setting of the placement table 11 facilitates the placement of the bearing. When the placement level of the work base 1 cannot be guaranteed, a horizontal adjustment member is provided under the placement platform 11. The horizontal adjustment member has various structures, including: three adjustment bolts, which are threaded through the work base 1, and the upper ends of the adjustment bolts are evenly connected to the bottom of the placement platform 11, and the lower ends of the adjustment bolts are provided with adjustment handles, which can be multi-sided rods, etc. The horizontal degree of the placement platform 11 can be adjusted by adjusting the bolts, and the details are not repeated here. The upper surface of the placement platform 11 can also be provided with a level meter, which is used to indicate the horizontal degree of the placement platform 11, and the specific structure is not repeated here.

[0044] The rotation detection member 7 is mounted on the detection frame 5, and is used to be inserted into the inner ring of the bearing and rotate the inner ring of the bearing by rotating. The rotation detection member 7 can be a combination structure of a telescopic rotating rod and a motor, and the motor is mounted on the detection frame 5. The telescopic rotating rod is vertically connected to the detection frame 5, and the motor output shaft is coaxially fixedly connected to the telescopic rotating rod. The lower end of the telescopic rotating rod can be embedded in the inner ring of the bearing. When the bearing is tested, the lower end of the telescopic rotating rod is embedded and fixed to the inside of the fixed inner ring of the bearing. Reference Figure 3The rotating detection member 7 may also include: a detection drive member 6, which is fixedly mounted on the detection frame 5. The detection drive member 6 may be a motor with adjustable rotation speed. The output shaft of the detection drive member 6 is perpendicular to the plane where the bearing is placed, that is, the upper surface of the working base 1 or the placement table 11. The details are not repeated here. The screw 12 is coaxially fixedly connected to the output shaft of the detection drive member 6. A friction sleeve 8 is fixedly connected to the detection frame 5. A screw sleeve 13 is nested inside the friction sleeve 8 and can be raised and lowered. There is friction between the screw sleeve 13 and the friction sleeve 8. At this time, a friction layer or axial anti-rotation stripes can be set on the surface of the screw sleeve 13. The details are not repeated here. The lower end of the screw 12 is threadedly embedded in the interior of the screw sleeve 13. The friction between the screw sleeve 13 and the friction sleeve 8 is greater than the friction between the screw sleeve 13 and the screw 12. The lower end of the screw sleeve 13 is provided with an expansion member 18, and the outer wall of the screw sleeve 13 is provided with an embedding groove 17, and the inside of the embedding groove 17 is provided with a centrifugal member 15, and the centrifugal member 15 can slide out of the embedding groove 17 when subjected to centrifugal force. The centrifugal member 15 can be a counterweight block and a rotating rod structure, and the rotating rod is rotatably connected to the inside of the embedding groove 17. When the centrifugal member 15 is embedded in the inside of the embedding groove 17, the centrifugal member 15 can form a curved surface structure that matches the outer periphery of the screw sleeve 13 with the embedding groove 17. Of course, the centrifugal member 15 can also be connected by a pull rope, and the details are not repeated here.

[0045] The tension sensor 16 is used to sense the deflection centrifugal force F of the rotating detection member 7. Specifically, it can be connected to the centrifugal member 15 to sense the pressure exerted on the centrifugal member 15. When the centrifugal member 15 is subjected to centrifugal force, the tension sensor 16 can sense the tension. The structure of the tension sensor 16 is a prior art and will not be described in detail here. The mass of the centrifugal member 15 is a fixed value, which can be set according to the detection requirements. It is generally set at 0.5-10kg. Of course, this is not representative and specific design is required for specific situations. A rotating sleeve 14 can be provided on the outer periphery of the upper end of the screw sleeve 13. When the rotating sleeve 14 is embedded in the interior of the friction sleeve 8, the screw sleeve 13 can rotate freely inside the friction sleeve 8. Driven by the detection drive member 6, the screw 12 rotates with the output shaft of the detection drive member 6. Since the friction between the screw sleeve 13 and the friction sleeve 8 is greater than the friction between the screw 12 and the screw sleeve 13. The screw sleeve 13 cannot rotate inside the friction sleeve 8. As the screw 12 rotates, the screw sleeve 13 slides axially downward inside the friction sleeve 8, and the expansion piece 18 descends with the screw sleeve 13. When the expansion piece 18 is embedded in the inner ring of the bearing, the expansion piece 18 cannot be lowered, and the screw 12 can drive the inner ring of the bearing to rotate. The centrifugal force exerted on the centrifugal piece 15 can be sensed by the tension sensor 16. When the expansion piece 18 is embedded in the inner ring of the bearing, the rotating sleeve 14 enters the interior of the friction sleeve 8. At this time, the screw sleeve 13 cannot be raised or lowered axially, and the screw sleeve 13 can rotate with the screw 12. When the bearing needs to be released, the screw sleeve 13 needs to be manually dragged to disengage the rotating sleeve 14 from the friction sleeve 8. This can greatly reduce the friction between the screw sleeve 13 and the friction sleeve 8, making the detection smoother. Reference Figure 4The expansion member 18 may include an arc-shaped piece 20, a connecting rod 21, a platform-shaped rod 23 and a supporting rod 24. The arc-shaped piece 20 is provided in plurality and radially slidably arranged at the bottom of the screw sleeve 13. The screw sleeve 13 and the cylinder formed by the plurality of arc-shaped pieces 20 need to be coaxially arranged. The number of the arc-shaped pieces 20 may be set to three groups. The arc-shaped piece 20 is located on the periphery of the axis of the screw sleeve 13, and a table-shaped rod 23 and a support rod 24 are axially slidably nested inside the arc-shaped piece 20. The support rod 24 is coaxially fixedly connected to the upper and lower ends of the table-shaped rod 23. The upper end of the support rod 24 is axially slidably nested in the bottom of the screw sleeve 13, and the lower end of the support rod 24 extends out of the arc-shaped piece 20. The radius of the upper end of the table-shaped rod 23 is smaller than the radius of the lower end. A plurality of sliding drive grooves 22 are provided on the inclined arc surface of the table-shaped rod 23, and the number of the sliding drive grooves 22 is consistent with the number of the arc-shaped pieces 20. A connecting rod 21 is fixedly connected to the inner arc surface of the arc-shaped piece 20, and the connecting rod 21 is slidably nested in the inside of the sliding drive groove 22. When the screw sleeve 13 descends, the support rod 24 and the arc-shaped piece 20 are inserted into the inner ring of the bearing. At this time, the support rod 24 contacts the table 11 or the table surface of the work base 1. The screw sleeve 13 continues to descend, and the support rod 24 moves axially relative to the arc-shaped piece 20. Since the arc-shaped piece 20 cannot slide axially on the screw sleeve 13, the connecting rod 21 is moved by the table-shaped rod 23 to push the arc-shaped piece 20 outward, so that the arc-shaped piece 20 slides radially outward to complete the expansion, thereby completing the fixed support of the bearing. When the screw sleeve 13 is lifted, the support rod 24 loses support. Under the action of gravity, the support rod 24 descends and drives the arc-shaped piece 20 to move closer, thereby completing the release of the bearing. This structure can achieve corresponding structural linkage coordination through the bearing during the detection process, so that each structure is consistent with the operation process and the organic coordination of the structure is achieved, and automatic expansion support and release are achieved, achieving automatic operation of the machine. The placement table 11 is rotatably designed with a rotating protrusion 9. When the expansion piece 18 is embedded in the inner ring of the bearing, the support rod 24 contacts the rotating protrusion 9. When the support rod 24 rotates with the inner ring of the bearing, the setting of the rotating protrusion 9 reduces the friction of the rotation of the inner ring of the bearing, making the bearing detection smoother and more accurate.

[0046] The controller 10 can be installed on the working base 1 and is electrically connected to the feed drive 2, the detection drive 6 and the tension sensor 16. The controller 10 can control the feed of the feed drive 2 and the rotation drive direction and rotation speed of the detection drive 6, and receive the centrifugal force sensed by the tension sensor 16. In the process of bearing detection, the bearing to be detected is placed at a designated location, that is, the inner ring of the bearing is sleeved on the rotating protrusion 9, the feed drive 2 is controlled by the placement table 11 to drive the driving harpoon 3 to move, and then the clamping fork rod 4 is controlled to clamp the outer ring of the bearing from multiple points, and the feed drive 2 stops feeding. The controller 10 controls the detection drive 6 to start. Under the drive of the detection drive 6, the screw 12 rotates. Since the friction between the friction sleeve 8 and the screw sleeve 13 is greater than the friction between the screw 12 and the screw sleeve 13, the screw sleeve 13 descends under the rotation of the screw 12, and the support rod 24 and the arc piece 20 are inserted into the inner ring of the bearing. At this time, the support rod 24 contacts the table 11, the table surface of the working base 1 or the rotating protrusion 9, and the screw sleeve 13 continues to descend. The support rod 24 moves axially relative to the arc piece 20. Since the arc piece 20 cannot slide axially on the screw sleeve 13, the connecting rod 21 is pushed outward by the movement of the table rod 23, so that the arc piece 20 slides radially outward to complete the expansion, thereby realizing the fixed support of the bearing. The screw sleeve 13 cannot fall axially with the screw 12. At this time, the screw sleeve 13 rotates with the screw 12, driving the inner ring of the bearing to rotate. Since the outer ring of the bearing is fixed, the inner ring rotates with the screw sleeve 13, and the centrifugal member 15 slides out of the embedded groove 17 under the action of the centrifugal force of the rotation. The controller controls the detection drive member 6 to increase the output angular velocity ω at a preset growth rate, and obtains the centrifugal force F through the real-time detection of the tension sensor 16 until the output angular velocity of the detection drive member 6 reaches a preset maximum angular velocity ω. m The preset growth rate can be obtained by detecting the performance of the driving member 6 and analyzing the process, which is generally 0.1-10rad / S 2 The maximum angular velocity ω is m , can be set according to the maximum bearing capacity of the bearing, which can be obtained through experience or by calculation. where F m M is the mass of the centrifugal member 15, which can be obtained through the equipment parameters. L is the length of the rotating rod or the pull wire connected to the centrifugal member 15. θ is the angle between the centrifugal member 15 and the axis of the screw sleeve 13. Due to the high rotation speed of the screw sleeve 13, θ here is infinitely close to 90°, which can be understood as When the angular velocity of the detection drive member 6 increases to the maximum angular velocity ω mAfter that, the detection drive member 6 stops driving and drives in the reverse direction, the screw rod 12 pulls the screw rod sleeve 13 to lift, and the screw rod sleeve 13 carries the expansion member 18 to lift. The support rod 24 loses support, the support rod 24 drops and drives the arc piece 20 to move closer, thereby completing the release of the bearing. The controller 10 constructs a plane coordinate system, the horizontal coordinate of which is the angular velocity ω of the rotation of the screw rod sleeve 13, which can be obtained by detecting the output angular velocity of the drive member 6. The specific acquisition method is a prior art and is not described here. The vertical coordinate is the tension. And the fluctuation curve ω-F is constructed by the angular velocity ω of the rotation of the screw rod sleeve 13 and the centrifugal force sensed by the tension sensor 16, and then the fitting curve ω-F' is obtained by the fluctuation curve. At this time, the fluctuation curve ω-F is the horizontal coordinate of the angular velocity ω of the rotation of the screw rod sleeve 13, and the vertical coordinate is the centrifugal force F sensed by the tension sensor 16. The horizontal coordinate of the fitting curve is the angular velocity ω of the rotation of the screw rod sleeve 13, and the vertical coordinate is the vertical coordinate F' corresponding to the fitting curve. The fitting curve can be obtained by smooth fitting, which is a prior art and will not be described in detail here. The fitting curve is implanted into the plane coordinate system, and then the fluctuation degree of the bearing is calculated. Where F is the ordinate value of the fluctuation curve, F' is the ordinate value of the fitting curve, and ω' is the coordinate value of the end point of the characterization segment. In the actual detection process, the value is generally taken as ω m , by default, the fluctuation is qualified when it is close to the maximum angular velocity, and it is qualified when it is less than the maximum angular velocity. a is the length of the characterization segment, which is generally ω-5ω. Of course, it can also be other numerical settings, which will not be described in detail here. This method can calculate the degree of fluctuation of centrifugal force and then evaluate it. Then judge whether the fluctuation degree B is greater than a preset standard fluctuation degree B 标 If yes, it is judged as unqualified, if no, it is judged as qualified. Standard fluctuation degree B 标 It can be obtained according to the use parameters of the bearing, and it can be designed specifically according to the actual situation. Since it is not the subject of protection of this application, it will not be described in detail here. This method can be used to determine whether the fluctuation within the radial pressure bearing capacity of the bearing is qualified, and the evaluation ability is strong. The evaluation of this application is limited to centrifugal force, and other interfering forces are relatively small. It will not be disturbed by external forces, and the evaluation is more objective. This application is connected by a screw 12 and a screw sleeve 13. When the axial overlap is small, the interference to the centrifugal force is small, which is suitable for the use scenario of the bearing.

[0047] Example 2

[0048] refer to Figure 6 In this embodiment, a bearing running roundness fluctuation detection method is proposed, comprising the following steps:

[0049] S1. Fix the outer ring of the bearing to be tested by means of a clamp.

[0050] S2. The rotation detection member 7 is embedded in the inner ring of the bearing and fixed.

[0051] S3, controlling the rotating detection member 7 to increase the output angular velocity ω at a preset increasing rate.

[0052] S4, the centrifugal force F is obtained by real-time detection through the tension sensor 16, until the output angular velocity of the detection driving member 6 reaches a preset maximum angular velocity ω m .

[0053] S5, controlling the rotating detection member 7 to release the inner ring of the bearing, and the clamping member to release the outer ring of the bearing.

[0054] S6. Construct a plane coordinate system, wherein the horizontal coordinate of the plane coordinate system is the angular velocity ω, and the vertical coordinate is the tension.

[0055] S7, and construct a fluctuation curve ω-F through the angular velocity ω of the screw sleeve 13 and the centrifugal force sensed by the tension sensor 16, and then obtain a fitting curve ω-F' through the fluctuation curve.

[0056] S8. Calculate the fluctuation degree of the bearing Where F is the ordinate value of the fluctuation curve, F' is the ordinate value of the fitting curve, ω' is the coordinate value of the end point of the characterization segment, and a is the length of the characterization segment.

[0057] S9. Determine whether the fluctuation degree B is greater than a preset standard fluctuation degree B. 标 If yes, it is judged as unqualified, if no, it is judged as qualified.

[0058] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention are implemented according to the conventional means in the field unless otherwise specified and limited.

Claims

1. A bearing running roundness fluctuation detection device, characterized in that: The bearing running roundness fluctuation detection device comprises: Working abutment; The detection frame is fixedly installed on the working base, and the detection frame is used for support and installation; A clamping piece is installed on the working base, and is used to clamp the placed bearing and fix the outer ring of the bearing to be tested; A rotating detection member is installed on the detection frame and is used to be inserted into the inner ring of the bearing and rotate the inner ring of the bearing by rotating; A tension sensor, which is used to sense the deflection centrifugal force F of the rotating detection member; The controller is used to fix the outer ring of the bearing to be tested through a clamping member; the rotating detection member is embedded in the inner ring of the bearing and fixed; the rotating detection member is controlled to increase the output angular velocity ω at a preset growth rate; the centrifugal force F is obtained by real-time detection through a tension sensor until the output angular velocity of the detection drive member reaches a preset maximum angular velocity ω m ; Control the rotating detection member to release the inner ring of the bearing, and the clamping member to release the outer ring of the bearing; construct a plane coordinate system, the horizontal coordinate of the plane coordinate system is the angular velocity ω, and the vertical coordinate is the tension; and construct a fluctuation curve ω-F through the angular velocity ω of the rotating detection member and the centrifugal force sensed by the tension sensor, and then obtain a fitting curve ω-F' through the fluctuation curve; calculate the fluctuation degree B of the bearing, and determine whether the fluctuation degree B is greater than a preset standard fluctuation degree B 标 , if yes, it is judged as unqualified, if no, it is judged as qualified; The degree of fluctuation Where F is the ordinate value of the fluctuation curve, F' is the ordinate value of the fitting curve, ω' is the coordinate value of the end point of the characterization segment, and a is the length of the characterization segment.

2. A bearing running roundness fluctuation detection device according to claim 1, characterized in that: The clamping member specifically includes a feed drive member, a drive harpoon, and a clamping fork rod; the feed drive member is fixedly mounted on a working base; the drive harpoon is slidably arranged on the working base, and the drive harpoon has three clamping points; the middle of the drive harpoon is directly slidably embedded into the detection frame, and is directly fixedly connected with the clamping fork rod; the two sides of the drive harpoon are slidably embedded into the detection frame, and the clamping fork rod is slidably embedded in the interior of the detection frame, and the sliding directions of the three clamping fork rods intersect at the center of the placement point of the bearing, the drive harpoons on both sides are provided with teeth, and the corresponding clamping fork rods are provided with teeth, and the transmission structure is used for transmission between the clamping fork rod and the drive harpoon.

3. A bearing running roundness fluctuation detection device according to claim 2, characterized in that: The transmission structure is a gear set composed of gears of different diameters. The gear set includes two gears, namely gear A and gear B. The two gears are coaxially fixedly connected and rotatably connected inside the detection frame. Gear A and gear B are respectively meshed with the teeth on the driving harpoon and the clamping fork rod.

4. A bearing running roundness fluctuation detection device according to claim 1, characterized in that: A placing table is arranged on the working base, and a horizontal adjustment member is arranged under the placing table. The horizontal adjustment member comprises: three adjusting bolts, which are threaded through the working base, the upper ends of the adjusting bolts are evenly connected to the bottom of the placing table, and the lower ends of the adjusting bolts are provided with an adjusting handle.

5. The bearing running roundness fluctuation detection device according to claim 1 is characterized in that: The rotating detection member includes: a detection drive member, which is fixedly mounted on a detection frame; a screw rod, which is coaxially fixedly connected to the output shaft of the detection drive member; a friction sleeve fixedly connected to the detection frame, a screw sleeve nested inside the friction sleeve, and friction exists between the screw sleeve and the friction sleeve; the lower end of the screw rod is threadedly embedded in the interior of the screw sleeve, and the friction between the screw sleeve and the friction sleeve is greater than the friction between the screw sleeve and the screw; an expansion member is provided at the lower end of the screw sleeve, an embedding groove is provided on the outer side wall of the screw sleeve, and a centrifugal member is provided inside the embedding groove; and a tension sensor is installed on the centrifugal member.

6. A bearing running roundness fluctuation detection device according to claim 5, characterized in that: The expansion piece includes an arc-shaped piece, a connecting rod, a table-shaped rod and a support rod; there are multiple arc-shaped pieces, and they are radially slidably arranged at the bottom of the screw sleeve, and the cylinder formed by the screw sleeve and the multiple arc-shaped pieces needs to be coaxially arranged; the arc-shaped piece is on the periphery of the axis of the screw sleeve, and the table-shaped rod and the support rod are axially slidably nested inside the arc-shaped piece, and the support rod is coaxially fixedly connected to the upper and lower ends of the table-shaped rod, and the upper end of the support rod is axially slidably nested in the bottom of the screw sleeve, and the lower end of the support rod extends out of the arc-shaped piece, and the radius of the upper end of the table-shaped rod is smaller than the radius of the lower end, and multiple sliding drive grooves are opened on the inclined arc surface of the table-shaped rod, and the number of the sliding drive grooves is consistent with the number of arc-shaped pieces, and a connecting rod is fixedly connected to the inner arc surface of the arc-shaped piece, and the connecting rod is slidably nested inside the sliding drive groove.

7. A bearing running roundness fluctuation detection device according to claim 4, characterized in that: The placing table is rotatably designed with a rotating protrusion.

8. A bearing running roundness fluctuation detection device according to claim 5, characterized in that: The maximum angular velocity where F m is the set bearing capacity of the bearing, M is the mass of the centrifugal part, L is the length of the centrifugal part connection, and θ is the angle between the centrifugal part and the axis of the screw sleeve.

9. A method for detecting roundness fluctuation of a bearing in operation, applied to a device for detecting roundness fluctuation of a bearing in operation as claimed in any one of claims 1 to 8, characterized in that: The bearing running roundness fluctuation detection method comprises the following steps: S1. Fix the outer ring of the bearing to be tested by a clamping member; S2, the rotating detection part is embedded in the inner ring of the bearing and fixed; S3, controlling the rotating detection member to increase the output angular velocity ω at a preset growth rate; S4. The centrifugal force F is obtained by real-time detection through the tension sensor until the output angular velocity of the detection drive reaches a preset maximum angular velocity ω. m ; S5, controlling the rotating detection member to release the inner ring of the bearing, and the clamping member to release the outer ring of the bearing; S6. construct a plane coordinate system, wherein the abscissa of the plane coordinate system is the angular velocity ω, and the ordinate is the tension; S7, constructing a fluctuation curve ω-F through the angular velocity ω of the rotating detection member and the centrifugal force sensed by the tension sensor, and then obtaining a fitting curve ω-F' through the fluctuation curve; S8. Calculate and obtain the fluctuation degree B of the bearing; S9. Determine whether the fluctuation degree B is greater than a preset standard fluctuation degree B. 标 , if yes, it is judged as unqualified, if no, it is judged as qualified; The degree of fluctuation Where F is the ordinate value of the fluctuation curve, F' is the ordinate value of the fitting curve, ω' is the coordinate value of the end point of the characterization segment, and a is the length of the characterization segment.

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