Method and device for measuring radial clearance of large slewing bearing

Abstract

The invention discloses a method and device for measuring the radial clearance of a large slewing bearing, and relates to the technical field of industrial measurement, and the technical key points are that the device comprises an F-shaped clamp and a guide rod fixedly arranged on the outer wall of the F-shaped clamp, the surface of the guide rod is slidably sleeved with a movable rod, and the inner wall of the bottom end of the movable rod is provided with a screw in a threaded manner; the device has the technical effects that the guide rod is fixedly arranged on the outer wall of the F-shaped clamp, the movable rod is arranged on the surface of the guide rod in a sliding and sleeving mode, the screw rod is arranged on the inner wall of the bottom end of the movable rod in a threaded mode, and the side face, close to the pressing block, of the screw rod is hinged to the side face, close to the movable rod, of the pressing block; meanwhile, the handle is fixedly arranged on the outer surface of the screw in a penetrating mode, an operator can easily control the pressing block to clamp and loosen the bearing only by rotating the handle, operation is simple and visual, the efficiency of measurement preparation work is greatly improved, and the working difficulty of the operator is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of industrial measurement, in particular to a method and a device for measuring the radial clearance of a large slewing bearing. Background Art

[0002] Due to the large size and heavy weight of large slewing bearings, there is currently no special measuring equipment on the market to measure the radial clearance of this type of bearings.

[0003] At present, most manufacturers use a method to measure the radial clearance of large bearings. The principle is to use the weight of the large bearing itself to place the large bearing vertically. The difference in the table values ​​measured in the free state and the lifted state is the radial clearance measured by this measurement method.

[0004] However, during the measurement process, the bearings need to be placed vertically, and special auxiliary tooling needs to be made to prevent damage to the bearings and injuries to employees after tipping over. The lifting of the bearings requires the use of truss lifting or other lifting devices, which is complicated and has great safety hazards. Therefore, a method and device for measuring the radial clearance of large slewing bearings are proposed. Summary of the invention

[0005] To achieve the above object, the present invention provides the following technical solutions: A method for measuring the radial clearance of a large slewing bearing, comprising an F-type fixture and a guide rod fixedly arranged on the outer wall of the F-type fixture; A movable rod is slidingly sleeved on the surface of the guide rod, a screw is threadedly arranged on the inner wall of the bottom end of the movable rod, and a side of the screw close to the pressing block is hinged to a side of the pressing block close to the movable rod.

[0006] Preferably, a handle is fixedly provided on the outer surface of the screw.

[0007] Preferably, the outer surface of the guide rod is provided with two guide grooves, and the inner walls of the two guide grooves are respectively slidably provided with two guide blocks, and the surfaces of the two guide blocks are fixedly connected to the inner side surface of the top end of the movable rod.

[0008] Preferably, a stop pin is fixedly provided on the front side of the guide rod and extends to the rear side of the guide rod, and the stop pin is used to prevent the movable rod from falling off.

[0009] Preferably, a magnetic meter frame is magnetically adsorbed on the top surface of the inner ring of the bearing, and the head of the magnetic meter frame is in contact with the inner side surface of the bearing.

[0010] A method for measuring the radial clearance of a large slewing bearing, based on the above-mentioned device for measuring the radial clearance of a large slewing bearing, comprises the following steps: Step 1: First prepare two devices, and then place the bearing flat on the platform; Step 2: Place the two devices symmetrically on the outer wall of the bearing, adsorb the magnetic meter holder on the end face of the inner ring of the bearing, and place the head of the magnetic meter holder on the inner hole surface of the outer ring of the bearing; Step 3: Loosen the device on one side, and then rotate the handle of the device on the other side to clamp the bearing. Read the measurement value of the magnetic meter stand at this time and record it as A1; Step 4: Keep the magnetic meter stand still, loosen the device that clamps the bearing in the above steps, repeat the above steps so that the device on the other side clamps the bearing, read the measured value of the magnetic meter stand header again, record it as A2, and the radial clearance value of the bearing is A1-A2. Beneficial Effects

[0011] Compared with the prior art, the present invention provides a method and device for measuring the radial clearance of a large slewing bearing, which has the following beneficial effects: 1. A guide rod is fixedly arranged on the outer wall of the F-type fixture, and the movable rod is slidably sleeved on the surface of the guide rod. A screw is arranged on the inner wall of the bottom end of the movable rod. The side of the screw close to the pressure block is hinged with the side of the pressure block close to the movable rod. At the same time, a handle is fixedly arranged on the outer surface of the screw. The operator only needs to rotate the handle to easily control the clamping and loosening of the pressure block on the bearing. The operation is simple and intuitive, which greatly improves the efficiency of measurement preparation and reduces the difficulty of the operator's work. There are two guide grooves on the outer surface of the guide rod, and two guide blocks are slidably arranged on the inner walls of the two guide grooves, and the surfaces of the two guide blocks are fixedly connected to the inner side of the top of the movable rod. This design ensures the precise guidance of the movable rod when it slides on the guide rod, so that the movable rod always maintains a stable trajectory during the up and down movement, effectively avoiding the measurement error that may be caused by the deviation of the movable rod, ensuring the reliability of the entire measuring device during use, and laying a good structural foundation for the accurate measurement of the radial clearance of the bearing; A stop pin is fixed through the front of the guide rod, and its back extends to the rear of the guide rod. The stop pin is used to prevent the movable rod from falling off. This design detail not only ensures the safety of the device during use, avoiding possible equipment damage or personal injury caused by the accidental falling of the movable rod, but also ensures that the measurement work can be carried out smoothly and continuously without worrying about interrupting the measurement operation due to accidental detachment of components, thus improving the overall user experience and work efficiency.

[0012] 2. First, place the bearing flat on the platform, and then place the two devices symmetrically on the outer circle of the outer ring and the inner hole of the inner ring of the bearing. At one end of an F-type fixture, adsorb the magnetic meter stand on the end face of the inner ring of the bearing so that the head of the magnetic meter stand is on the inner hole surface of the outer ring of the bearing. Then, by clamping the bearing from both sides in succession, read the measured values ​​of the magnetic meter stand head respectively, and then take the difference to determine the radial clearance value of the bearing. This method of alternating measurement on both sides and difference calculation can effectively eliminate the systematic errors that may be caused by factors such as bearing placement and device installation, making the final radial clearance measurement value more accurate, and can more truly reflect the actual radial clearance of the bearing, providing reliable data support for quality inspection, performance evaluation, and subsequent installation and commissioning of large slewing bearings; This measurement method is applicable to large slewing bearings of different specifications and sizes. It only requires preparing two measuring devices according to the corresponding steps, using an F-type fixture to correctly place the device at the corresponding position of the bearing, and combining it with a magnetic table stand for measurement. Its operation process is clear and easy for operators to master. It does not require complex training or special skills. It can be easily and quickly implemented in various scenarios involving the production, manufacturing, maintenance and inspection of large slewing bearings, which helps to improve the overall level and standardization of radial clearance measurement of large slewing bearings in the industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a three-dimensional schematic diagram of the structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic diagram of measuring the radial clearance of a bearing according to the present invention; Figure 4 For the present invention Figure 2 Enlarged schematic diagram of area A in the middle; Figure 5 For the present invention Figure 3 Enlarged schematic diagram of area B in the middle.

[0014] In the figure: 1. F-type clamp; 2. Guide rod; 3. Screw rod; 4. Handle; 5. Movable rod; 6. Pressure block; 7. Bearing; 8. Magnetic meter stand; 9. Stop pin. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions 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 are within the scope of protection of the present invention. Example 1

[0016] like Figure 1-Figure 5 As shown, this embodiment proposes a technical solution, a device for measuring the radial clearance of a large slewing bearing, comprising an F-type fixture 1 and a guide rod 2 fixedly arranged on the outer wall of the F-type fixture 1; A movable rod 5 is slidingly sleeved on the surface of the guide rod 2, and a screw 3 is threaded on the inner wall at the bottom end of the movable rod 5. The side of the screw 3 close to the pressure block 6 is hinged to the side of the pressure block 6 close to the movable rod 5. A handle 4 is fixedly provided on the outer surface of the screw 3. Two guide grooves are provided on the outer surface of the guide rod 2. Two guide blocks are slidingly provided on the inner walls of the two guide grooves respectively. The surfaces of the two guide blocks are fixedly connected to the inner side surface of the top of the movable rod 5. A stop pin 9 is fixedly provided on the front side of the guide rod 2 and extends to the rear of the guide rod 2. The stop pin 9 is used to prevent the movable rod 5 from falling off. A magnetic meter frame 8 is provided on the top surface of the inner ring of the bearing 7 for magnetic adsorption, and the head of the magnetic meter frame 8 is in contact with the inner side surface of the bearing 7.

[0017] In this embodiment, a guide rod 2 is fixedly arranged on the outer wall of the F-type fixture 1, and the movable rod 5 is slidably sleeved on the surface of the guide rod 2. A screw rod 3 is threadedly arranged on the inner wall of the bottom end of the movable rod 5. A side of the screw rod 3 close to the pressure block 6 is hinged to a side of the pressure block 6 close to the movable rod 5. At the same time, a handle 4 is fixedly arranged on the outer surface of the screw rod 3. The operator only needs to rotate the handle 4 to easily control the clamping and loosening of the pressure block 6 on the bearing 7. The operation is simple and intuitive, which greatly improves the efficiency of the measurement preparation work and reduces the difficulty of the operator's work. Two guide grooves are provided on the outer surface of the guide rod 2, and two guide blocks are slidably provided on the inner walls of the two guide grooves, and the surfaces of the two guide blocks are fixedly connected to the inner side surface of the top of the movable rod 5. Such a design ensures the precise guidance of the movable rod 5 when it slides on the guide rod 2, so that the movable rod 5 always maintains a stable trajectory during the up and down movement, effectively avoiding the measurement error that may be caused by the deviation of the movable rod 5, ensuring the reliability of the entire measuring device during use, and laying a good structural foundation for the accurate measurement of the radial clearance of the bearing 7; A stop pin 9 is fixedly provided on the front of the guide rod 2, and its back extends to the rear of the guide rod 2. The stop pin 9 is used to prevent the movable rod 5 from falling off. This design detail not only ensures the safety of the device during use, avoiding possible equipment damage or personal injury caused by the accidental falling off of the movable rod 5, but also ensures that the measurement work can be carried out smoothly and continuously without worrying about interruption of the measurement operation due to accidental detachment of components, thereby improving the overall user experience and work efficiency. Example 2

[0018] like Figure 1-Figure 5 As shown, based on the same concept as the above-mentioned embodiment 1, this embodiment also proposes a method for measuring the radial clearance of a large slewing bearing, comprising the following steps: Step 1: First prepare two devices, and then place the bearing 7 flat on the platform; Step 2: Place the two devices symmetrically on the outer wall of the bearing 7, adsorb the magnetic meter frame 8 on the end surface of the inner ring of the bearing 7, and place the head of the magnetic meter frame 8 on the inner hole surface of the outer ring of the bearing; Step 3: Loosen the device on one side, and then rotate the handle 4 of the device on the other side to clamp the bearing 7, and read the measured value of the magnetic meter stand 8 at this time, and record it as A1; Step 4: Keep the magnetic meter stand 8 still, loosen the device that clamps the bearing 7 in the above step 3, repeat the operation in the above step 3 so that the device on the other side clamps the bearing 7, read the measured value of the magnetic meter stand 8 again, record it as A2, and the radial clearance value of the bearing 7 is A1-A2.

[0019] In this embodiment: first place the bearing 7 flat on the platform, then place the two devices symmetrically on the outer circle of the outer ring and the inner hole of the inner ring of the bearing 7, and at one end of an F-type fixture 1, adsorb the magnetic meter holder 8 on the end face of the inner ring of the bearing 7, so that the head of the magnetic meter holder 8 is against the inner hole surface of the outer ring of the bearing. Then, by clamping the bearing 7 from both sides in succession, read the measured values ​​of the head of the magnetic meter holder 8 respectively, and then take the difference to determine the radial clearance value of the bearing 7. This method of alternating measurement on both sides and difference calculation can effectively eliminate the system errors that may be caused by factors such as the placement of the bearing 7 and the installation of the device, so that the radial clearance measurement value finally obtained is more accurate, and can more truly reflect the actual radial clearance of the bearing 7, providing reliable data support for the quality inspection, performance evaluation, and subsequent installation and commissioning of large slewing bearings 7; This measurement method has good applicability to large slewing bearings 7 of different specifications and sizes. It only needs to prepare two measuring devices according to the corresponding steps, use the F-type fixture 1 to correctly place the device at the corresponding position of the bearing 7, and measure it in combination with the magnetic meter stand 8. Its operation process is clear and easy for operators to master. It does not require complex training or special skills. It can be easily and quickly implemented in various scenarios involving the production, manufacturing, maintenance and inspection of large slewing bearings 7, which helps to improve the overall level and standardization of radial clearance measurement of large slewing bearings 7 in the industry.

[0020] When using, first prepare two devices, and then place the bearing 7 flat on the platform; Place the two devices symmetrically on the outer wall of the bearing 7, adsorb the magnetic meter frame 8 on the end surface of the inner ring of the bearing 7, and manually control the meter head of the magnetic meter frame 8 to press against the inner hole surface of the outer ring of the bearing; Loosen the device on one side, and then rotate the handle 4 of the device on the other side. When the handle 4 rotates, the screw 3 can rotate. During the rotation of the screw 3, the pressing block 6 can move horizontally. When the pressing block 6 moves toward one end of the F-type clamp 1, it can contact the outer wall of the bearing 7. After the outer wall of the pressing block 6 contacts the outer wall of the bearing 7, the bearing 7 can be clamped by the F-type clamp 1. Read the measured value of the magnetic meter stand 8 at this time and record it as A1. Keep the magnetic meter stand 8 still, loosen the device that clamps the bearing, repeat the above operation so that the device on the other side clamps the bearing 7, read the measured value of the magnetic meter stand 8 again, and record it as A2. The radial clearance value of the bearing 7 is A1-A2.

[0021] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to solve basically the same technical problems and achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. A device for measuring radial clearance of a large slewing bearing, characterized in that: It comprises an F-shaped clamp (1) and a guide rod (2) fixedly arranged on the outer wall of the F-shaped clamp (1); A movable rod (5) is slidably sleeved on the surface of the guide rod (2), a screw rod (3) is threadedly arranged on the inner wall of the bottom end of the movable rod (5), and a side surface of the screw rod (3) close to the pressing block (6) is hingedly connected to a side surface of the pressing block (6) close to the movable rod (5).

2. A device for measuring radial clearance of a large slewing bearing according to claim 1, characterized in that: A handle (4) is fixedly provided through the outer surface of the screw rod (3).

3. The device for measuring radial clearance of a large slewing bearing according to claim 1, characterized in that: The outer surface of the guide rod (2) is provided with two guide grooves, and the inner walls of the two guide grooves are respectively provided with two guide blocks for sliding movement, and the surfaces of the two guide blocks are fixedly connected to the inner side surface of the top end of the movable rod (5).

4. The device for measuring radial clearance of a large slewing bearing according to claim 1, characterized in that: A stop pin (9) is fixedly provided through the front side of the guide rod (2) and extends to the rear side of the guide rod (2). The stop pin (9) is used to prevent the movable rod (5) from falling off.

5. The device for measuring radial clearance of a large slewing bearing according to claim 1, characterized in that: A magnetic meter frame (8) is provided on the top surface of the inner ring of the bearing (7) by magnetic attraction, and a meter head of the magnetic meter frame (8) is in contact with the inner side surface of the bearing (7).

6. A method for measuring radial clearance of a large slewing bearing according to claim 1, based on a device for measuring radial clearance of a large slewing bearing according to claims 1-5, characterized in that: The following steps are involved: Step 1: First prepare two devices, and then place the bearing (7) flat on the platform; Step 2: Place the two devices symmetrically on the outer wall of the bearing (7), adsorb the magnetic meter frame (8) on the end surface of the inner ring of the bearing (7), and place the head of the magnetic meter frame (8) on the inner hole surface of the outer ring of the bearing; Step 3: Loosen the device on one side, and then rotate the handle (4) of the device on the other side to clamp the bearing (7). Read the measured value of the magnetic meter stand (8) at this time and record it as A1. Step 4: The magnetic meter stand (8) remains stationary, and the device for clamping the bearing (7) in step 3 is loosened. The operation in step 3 is repeated so that the device on the other side clamps the bearing (7). The measured value of the magnetic meter stand (8) is read again and recorded as A2. The radial clearance value of the bearing (7) is A1-A2.

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