CN218496409U - Bearing test bench for megawatt wind generating set - Google Patents
Bearing test bench for megawatt wind generating set Download PDFInfo
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- CN218496409U CN218496409U CN202123160618.9U CN202123160618U CN218496409U CN 218496409 U CN218496409 U CN 218496409U CN 202123160618 U CN202123160618 U CN 202123160618U CN 218496409 U CN218496409 U CN 218496409U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/72—Wind turbines with rotation axis in wind direction
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Abstract
The application discloses megawatt level wind generating set bearing test platform, it includes the base, and the bearing is removable to be set up in the base, and the base is provided with a plurality of steady ring supporting shoes in the solid fixed ring of bearing, and the base is provided with the axial displacement sensor who is used for measuring the solid fixed ring of bearing and the relative axial displacement of swivel becket, and the center department of base still rotates and is provided with the moment measuring device who is used for driving the bearing swivel becket to rotate and measure bearing friction torque. This application measures the friction torque of bearing rotation in-process through moment measuring device, and axial displacement sensor measures the axial internal clearance that the bearing produced at the rotation in-process, and radial displacement sensor measures the radial internal clearance of bearing, and swivel becket temperature sensor measures the temperature of swivel becket, and solid fixed ring temperature sensor measures solid fixed ring's temperature, and the messenger can measure the self nature of a plurality of differences of bearing simultaneously.
Description
Technical Field
The application relates to the field of unit testing equipment, in particular to a bearing test board for a megawatt wind generating set.
Background
At present, wind power generation is equipment for converting kinetic energy of wind into mechanical energy of a wind wheel shaft, and a wind turbine generator set is driven by the wind wheel shaft to rotate to generate electricity. The main part of the wind power generation is a wind power generator which comprises a cabin, rotor blades, an axle center, a gear box, a generator and the like, so that the wind power generator is driven by using a plurality of bearings, gears and the like.
The method for measuring the bearing performance of the wind generating set in the related technology mainly comprises the steps of testing a bearing, a rotating platform, an adjusting tool, an automatic oil injection pump and an oil collection bottle; the test bearing comprises a bearing fixing ring, a bearing inner ring and a sealing ring; the bearing inner race and the coaxial setting of bearing outer race, bearing inner race and revolving stage can be dismantled and be connected, and the bearing outer race can be dismantled with the regulation frock and be connected, but the revolving stage autogiration, and bearing outer race and bearing inner race form the differential and rotate.
With respect to the related art among the above, the inventors consider that the following drawbacks exist: in the related technology, the relative displacement and the pressure bearing condition of the bearing sealing ring on the fan under the overturning moment are measured, but the property of the bearing cannot be measured.
Disclosure of Invention
In order to improve the problem that can not measure the nature of bearing self among the correlation technique, this application provides a megawatt level wind generating set bearing test platform.
The application provides a megawatt level wind generating set bearing test platform adopts following technical scheme:
the utility model provides a megawatt level wind generating set bearing test board, includes the base, the bearing can dismantle set up in the base, the base in the solid fixed ring of bearing is provided with a plurality of steady ring supporting shoes, the base in the swivel becket of bearing is provided with and is used for measuring the solid fixed ring of bearing and the relative axial play's of swivel becket axial displacement sensor, the joint is provided with the measurement on the base the radial play's of bearing radial displacement sensor, the center department of base still rotates and is provided with and is used for driving the bearing swivel becket to rotate and measure the moment measuring device of bearing friction torque.
By adopting the technical scheme, the fixing ring of the bearing is fixed on the base through the stabilizing ring supporting block, the torque measuring device drives the bearing rotating ring to rotate, and the friction torque of the bearing at different rotating speeds can be measured by setting different rotating speeds of the driving motor; the axial clearance of the bearing is measured by measuring different limit positions between the rotating ring and the fixing ring through the axial displacement sensor, and the radial clearance of the bearing is measured on the base through the radial displacement sensor. Enabling multiple properties of the bearing to be measured sequentially on the base.
Optionally, the base is provided with a radial displacement sensor for measuring the radial play of the bearing at a fixing ring of the bearing.
Through adopting above-mentioned technical scheme, the radial play of messenger's ability through radial displacement sensor to bearing measures.
Optionally, the torque measuring device includes a tension and compression sensor, a torsion arm, a torsion motor and a gear box, the torsion motor is disposed at the center of the base, a rotation shaft of the torsion motor is engaged with the gear box, an output shaft of the gear box is connected with the torsion arm, the torsion arm is connected with the tension and compression sensor, a slide rail is disposed at the lower end of the torsion arm, scale marks are scribed on the slide rail, the scale marks are used for reading a distance between the tension and compression sensor and the center of the base, one end of the tension and compression sensor is connected to the rotation ring, and the other end of the tension and compression sensor is connected to the torsion arm.
By adopting the technical scheme, the torsion motor drives the tension-compression torsion arm to rotate, the torsion arm drives the bearing rotating ring to rotate through the tension-compression sensor, the tension force for driving the rotating ring to rotate is measured through the tension-compression sensor, the lower end of the torsion arm is of a slide rail structure, scale marks are marked on the slide rail, the distance between the tension-compression sensor and the center of the base can be read, the product of the tension force and the distance between the compression sensor and the center of the base is friction torque, and the friction torque of the bearing at different rotating speeds can be measured by setting different rotating speeds of the driving motor.
Optionally, the upper end and the lower end of the rotating ring are respectively provided with a rotating ring fixing seat, one end of the rotating ring fixing seat is detachably connected to the rotating ring, and the other end of the rotating ring fixing seat is fixedly connected to the tension and compression sensor.
Through adopting above-mentioned technical scheme, be connected through rotatory ring fixing base with drawing the pressure sensor, make to draw and press the sensor and can rotate through rotatory ring fixing base drive swivel becket to measure the drive power when swivel becket rotates.
Optionally, the torsion arm is a telescopic arm.
Through adopting above-mentioned technical scheme, when the internal diameter of bearing is different, through the different length that sets up the torque arm, make and measure the bearing of different internal diameters.
Optionally, the base includes a plurality of supporting seats that intercrossing set up, the centre of a circle of bearing is with a plurality of the nodical coincidence of supporting seat, the stationary ring supporting shoe includes grip block, lower grip block and connects go up the grip block with the pretightning force bolt of grip block down, solid fixed ring centre gripping set up in go up the grip block with between the grip block down, the 'T' type groove has been seted up to the upper end of supporting seat, the lower extreme joint of grip block sets up in the 'T' type groove down.
Through adopting above-mentioned technical scheme, a plurality of supporting seats intercrossing sets up, and a plurality of supporting seats only have same nodical, and the grip block makes the solid fixed ring of grip block butt bearing down slide on the supporting seat, through rotatory pretightning force bolt, makes and goes up the grip block decline and press and fix bearing fixing ring to fix solid fixed ring.
Optionally, still include solid fixed ring temperature sensor and swivel ring temperature sensor, gu fixed ring temperature sensor install in the base is close to one side of solid fixed ring, swivel ring temperature sensor install in the base is close to one side of swivel ring.
By adopting the technical scheme, the rotating ring temperature sensor senses the temperature generated by the rotating bearing rotating ring in the rotating process, and the fixed ring temperature sensor senses the temperature generated by the fixed ring of the bearing in the rotating process of the rotating ring.
Optionally, an output shaft of the gear box is provided with an electrical slip ring connected to the rotating ring temperature sensor, and the electrical slip ring is disposed at the center of the base.
Through adopting above-mentioned technical scheme, the rotating ring temperature sensor is connected with the electrical slip ring, when the rotating ring temperature sensor rotates along with the rotating ring, can transmit the temperature data of rotating ring that the rotating ring temperature sensor measured through the electrical slip ring.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the torque measuring device drives the bearing rotating ring to rotate, the axial displacement sensor senses the axial displacement generated by the bearing in the rotating process, the axial clearance generated by the bearing in the rotating process is further measured, the radial clearance sensor senses the radial clearance of the bearing, and meanwhile, the torque measuring device measures the friction torque in the rotating process of the bearing, so that the friction torque and the axial clearance of the bearing can be measured simultaneously;
2. the rotating ring temperature sensor measures the temperature of the rotating ring, and the fixed ring temperature sensor measures the temperature of the fixed ring, so that the temperature data of the bearing in the rotating process can be obtained.
Drawings
FIG. 1 is a schematic diagram of the overall structure of one embodiment of the present application;
FIG. 2 is a schematic top view of the sensor assembly of FIG. 1 with the axial displacement sensor, the mounting base, the radial loading cylinder and the radial displacement sensor removed;
fig. 3 is an enlarged schematic view of a portion a in fig. 2.
Reference numerals: 1. a base; 2. a bearing; 21. a rotating ring; 22. a fixing ring; 3. a stabilizer ring support block; 4. an axial displacement sensor; 41. a mounting seat; 5. a radial loading oil cylinder; 51. a radial displacement sensor; 6. a torque measuring device; 61. a tension and compression sensor; 62. a torsion arm; 621. a rotating ring fixing seat; 63. a gear case; 7. an electrical slip ring.
Detailed Description
The present application is described in further detail below with reference to the attached drawings.
The embodiment of the application discloses bearing test bench for megawatt wind generating set.
Referring to fig. 1 and 2, a megawatt wind generating set bearing 2 test bench comprises a base 1, wherein the base 1 comprises a plurality of supporting seats which are arranged in a mutually crossed manner, and the circle center of the bearing 2 coincides with the intersection point of the supporting seats. In the present embodiment, the bearing 2 is suitable for a megawatt wind turbine, and the number of the supporting seats constituting the base 1 in the present embodiment is two, and the two supporting seats are arranged in a cross manner, in other embodiments, the number of the supporting seats constituting the base 1 may be more than two, and a plurality of supporting seats have a unique intersection point therebetween, so as to increase the load-bearing performance of the base 1. When the base 1 is spliced, the bearing 2 is placed on the base 1, so that the center of the bearing 2 and the center of the base 1 are superposed with each other.
In order to mount the base 1 on the bearing 2, the bearing 2 is detachably installed on the base 1, and the base 1 is provided with a plurality of stabilizer support blocks 3 on a fixing ring 22 of the bearing 2. In this embodiment, the fixing ring 22 and the rotating ring 21 are two parts on the bearing 2, not particularly referred to as an inner ring and an outer ring of the bearing 2, and only aim at two parts which are fixedly placed and rotatably set, the stabilizing ring support block 3 includes an upper clamping block, a lower clamping block and a plurality of pretightening force bolts which connect the upper clamping block and the lower clamping block, the fixing ring 22 is clamped between the upper clamping block and the lower clamping block, a 'T' -shaped groove is formed at the upper end of the support seat, the lower end of the lower clamping block is clamped in the 'T' -shaped groove, the 'T' -shaped groove enables the lower clamping block to move along the extending direction of the base 1, when the pretightening force bolts are rotated, the lower clamping block is fixed on the base 1, the pretightening force bolts are loosened in advance, the position of the lower clamping block on the base 1 is adjusted according to the difference of the outer diameters of the bearing 2, and then the pretightening force bolts are tightened, so that the bearings 2 with different outer diameters can be measured. The positions of the fixed ring 22 and the rotating ring 21 of the bearing 2 are flexibly changeable, in the figure, the fixed ring 22 is the outer ring of the bearing 2, and in the figure, the fixed ring 22 is the inner ring of the bearing 2.
The pretightening force bolt is rotated to enable the upper clamping block and the lower clamping block to approach each other for clamping, and meanwhile, the lower clamping block is fixed on the T-shaped groove, so that the fixing ring 22 of the bearing 2 is fixed on the base 1, and the rotating ring 21 of the bearing 2 can rotate freely. In this embodiment, each lower clamping block is provided with a protrusion, and the fixing ring 22 is jacked up by the protrusion, so as to jack up the bearing 2, and the rotating ring 21 of the bearing 2 is convenient to drive.
After the bearing 2 is mounted on the base 1, the properties of the bearing 2 are measured. The base 1 is provided with an axial displacement sensor 4 for measuring the relative axial displacement of the stationary ring 22 and the rotating ring 21 of the bearing 2. The axial displacement sensor 4 measures the values of two axial limit positions of the rotating ring 21 and the fixed ring 22 of the bearing 2 in the rotating process, and the values of the two limit positions are subtracted to obtain the value of the axial clearance of the bearing 2.
When measuring the axial play, firstly fixing one of the fixed ring 22 and the rotating ring 21, and the other one droops under the action of gravity, for example, fixing the fixed ring 22, wherein the displacement in the axial direction between the fixed ring 22 and the rotating ring 21 is one of the limit positions; then, an axial loading roller (located on the lower side of the inner wall of the rotating ring 21 in the figure) is arranged, a mounting seat 41 of the axial loading roller is mounted on the base 1, the axial loading roller is mounted on the base 1 through the mounting seat 41, the axial loading roller fixes the position of the rotating ring 21 of the bearing 2, so that the fixing ring 22 sags under the action of gravity, and at the moment, the displacement in the axial direction between the fixing ring 22 and the rotating ring 21 is another limit distance. In the process of measuring the axial clearance, the rotating ring 21 can rotate +/-degrees on the axial loading roller, the situation that a steel ball or a roller in the bearing 2 is clamped is avoided as much as possible, and the measurement on the axial clearance is more accurate.
After the axial play is measured, the radial play of the bearing 2 needs to be measured, in this embodiment, when the radial play is measured, two opposite radial loading cylinders 5 are clamped and arranged on the outer ring of the bearing 2, the two radial loading cylinders 5 are respectively and symmetrically installed on the outer ring of the bearing 2 along the diameter direction of the bearing 2, calipers are fixed on the bases of the two radial loading cylinders 5, two ends of each caliper are clamped and connected to two sides of the rotating ring 21 of the bearing 2, and radial displacement sensors 51 for measuring the displacement of the piston rod are respectively arranged on the radial loading cylinders 5, when the radial play of the bearing 2 is measured, one of the radial loading cylinders 5 drives the rotating ring 21 to move in the radial direction by pushing the calipers, and the caliper of the other radial loading cylinder 5 is released, so that the fixing ring 22 for pushing the bearing 2 moves in the opposite direction, and the moving distance of the piston rods of the two radial loading cylinders 5 is measured by the radial displacement sensor 51, that the moving distance is the radial displacement between the fixing ring 22 and the rotating ring 21 of the bearing 2, that is the radial play of the bearing 2.
The center of the base 1 is also rotatably provided with a torque measuring device 6 for driving the rotation ring 21 of the bearing 2 to rotate and measuring the friction torque of the bearing 2.
In order to measure the tension and compression of the bearing 2, the axial displacement sensor 4, the mounting seat 41, the radial loading cylinder 5 and the radial displacement sensor 51 need to be removed, the torque measuring device 6 comprises a tension and compression sensor 61, a torsion arm 62 and a torsion motor, the torsion motor is arranged at the center of the base 1 and used for providing power, the torsion motor is connected with the tension and compression sensor 61 through the torsion arm 62, the lower end of the torsion arm 62 is provided with a slide rail, scale marks are marked on the slide rail and used for reading the distance between the tension and compression sensor 61 and the center of the base 1, one end of the tension and compression sensor 61 is connected with the rotating ring 21, and the other end of the tension and compression sensor 61 is connected with the torsion arm 62. In the present embodiment, the tension/compression sensor 61 is a sensor capable of measuring tension and pressure, that is, when the rotation direction of the rotating ring 21 of the bearing 2 is different, the force measuring direction of the tension/compression sensor 61 is different. The torque arm 62 is a telescopic arm, and when the size of the bearing 2 is changed, the torque arm 62 and the inner diameter of the bearing 2 can be made to correspond to each other by changing the length of the torque arm 62. In the embodiment, when the torque of the torque motor is insufficient, in order to increase the torque of the torque motor, the rotating shaft of the torque motor is connected to the gear box 63, the gear box 63 is disposed at the center of the base 1, the transmission ratio of the torque motor is changed through the gear box 63, and the torque of the torque motor is increased, so that the torque motor can drive the torque arm 62 to rotate at a high speed, and further drive the rotating ring 21 to rotate at a high speed.
Referring to fig. 2 and 3, the upper and lower ends of the rotating ring 21 are respectively provided with a rotating ring fixing seat 621, one end of the rotating ring fixing seat 621 is detachably connected to the rotating ring 21, and the other end of the rotating ring fixing seat 621 is fixedly connected to the tension and compression sensor 61. In this embodiment, the rotating ring fixing seat 621 includes two connecting claws, the two connecting claws are respectively fixedly connected to two sides of the bearing 2, that is, the two connecting claws are respectively provided with a fixing bolt, and the fixing bolt is screwed to the oil hole of the bearing 2, so as to complete the connection with the bearing 2, the part of the two connecting claws extending out of the rotating ring 21 is connected with a connecting rod, the peripheral wall of the connecting rod is connected through the connecting pull-press sensor 61, and the pull-press sensor 61 is far away from one end of the connecting rod and fixedly connected with the torque arm 62.
When the rotating ring 21 of the bearing 2 needs to be driven to rotate, the torque motor is started to drive the torque arm 62 to rotate circumferentially along the axis direction of the bearing 2, the torque arm 62 rotates to drive the tension and compression sensor 61 to move, the tension and compression sensor 61 drives the connecting rod to move so as to drive the connecting claw to move, and therefore the rotating ring 21 of the bearing 2 is driven to rotate, the tension and compression sensor 61 can detect the rotating force which drives the rotating ring 21 of the bearing 2 to rotate, the tension value which can be detected by the tension and compression sensor 61 is F, and the distance L of the tension and compression sensor 61 returning to the rotation center of the bearing 2 can be obtained through the scale marks of the sliding rail, so that the rotating resistance of the bearing 2, namely the friction torque T = F L of the bearing 2 can be obtained.
Referring to fig. 1 and 2, the temperature sensor further includes a fixed ring 22 temperature sensor and a rotating ring 21 temperature sensor, the fixed ring 22 temperature sensor is installed on one side of the base 1 close to the fixed ring 22, the rotating ring 21 temperature sensor is installed on one side of the base 1 close to the rotating ring 21, in this embodiment, both one end of the rotating ring 21 temperature sensor and one end of the fixed ring 22 temperature sensor are provided with magnets, the rotating ring 21 temperature sensor is adsorbed on one side of the rotating ring 21 through the magnets, and the fixed ring 22 temperature sensor is adsorbed on one end of the fixed ring 22 through the magnets, the rotating ring 21 temperature sensor senses the temperature generated by the rotating ring 21 in the rotating process, and the fixed ring 22 temperature sensor senses the temperature of the fixed ring 22 in the rotating process of the rotating ring 21.
An output shaft of the gear box 63 is provided with an electric slip ring 7 connected with a temperature sensor of the rotating ring 21, the electric slip ring 7 is arranged at the center of the base 1, the temperature sensor of the rotating ring 21 is connected with the electric slip ring 7 through a lead, so that a temperature value can be transmitted to a processor through the electric slip ring 7, the processor receives temperature data of the rotating ring 21, and the temperature of the bearing 2 can be analyzed through the temperature data of the fixed ring 22 and the temperature data of the rotating ring 21.
The implementation principle of the bearing test bench of the megawatt wind generating set in the embodiment of the application is as follows: the fixed ring 22 of bearing 2 is fixed in on base 1 through stabilizing the ring supporting shoe 3, moment measuring device 6 drive bearing 2 rotating ring 21 rotates, axial displacement sensor 4 responds to the axial displacement that bearing 2 produced at the rotation in-process, and then measure the axial play that bearing 2 produced at the rotation in-process, moment measuring device 6 measures the friction torque of bearing 2 rotation in-process simultaneously, the messenger can measure the friction torque and the axial play of bearing 2 simultaneously, rotating ring 21 temperature sensor measures the temperature of rotating ring 21, fixed ring 22 temperature sensor measures the temperature of fixed ring 22, and measure the self nature of bearing 2 including friction torque, axial play, the temperature of fixed ring 22 and the temperature of rotating ring 21 etc..
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (8)
1. The utility model provides a megawatt level wind generating set bearing test platform which characterized in that: including base (1), bearing (2) removable set up in base (1), base (1) in the solid fixed ring (22) of bearing (2) are provided with a plurality of stationary ring supporting shoes (3), base (1) in swivel becket (21) of bearing are provided with and are used for measuring axial displacement sensor (4) of the solid fixed ring (22) of bearing (2) and swivel becket (21) relative axial play, the joint is provided with the measurement on base (1) radial displacement sensor (51) of the radial play of bearing (2), the center department of base (1) still rotates and is provided with and is used for driving bearing (2) swivel becket (21) to rotate and measure moment measuring device (6) of bearing (2) friction torque.
2. The bearing test bench for megawatt wind generating sets according to claim 1, wherein: the base (1) is in the solid fixed ring (22) department of bearing (2) still is provided with measures radial displacement sensor (51) of bearing (2) radial play.
3. The bearing test bench for megawatt wind generating sets according to claim 1, wherein: the torque measuring device (6) comprises a tension and compression sensor (61), a torsion arm (62), a torsion motor and a gear box (63), the torsion motor is arranged at the center of the base (1), a rotating shaft of the torsion motor is meshed with the gear box (63), an output shaft of the gear box (63) is connected with the torsion arm (62), the torsion arm (62) is connected with the tension and compression sensor (61), a sliding rail is arranged at the lower end of the torsion arm, scale marks are carved on the sliding rail and used for reading the distance between the tension and compression sensor and the center of the base, one end of the tension and compression sensor (61) is connected with the rotating ring (21), and the other end of the tension and compression sensor (61) is connected with the torsion arm (62).
4. The bearing test bench for megawatt wind generating sets according to claim 3, wherein: the upper end and the lower end of the rotating ring (21) are respectively provided with a rotating ring fixing seat (621), one end of the rotating ring fixing seat (621) is detachably connected with the rotating ring (21), and the other end of the rotating ring fixing seat (621) is fixedly connected with the tension and compression sensor (61).
5. The megawatt wind generating set bearing test bench of claim 3, wherein: the torque arm (62) is a telescopic arm.
6. The bearing test bench for megawatt wind generating sets according to claim 1, wherein: the base (1) comprises a plurality of supporting seats which are arranged in an intersecting manner, the circle center of the bearing (2) is coincident with the intersection point of the supporting seats, the stabilizing ring supporting block (3) comprises an upper clamping block, a lower clamping block and a pretightening force bolt which is connected with the upper clamping block and the lower clamping block, the fixing ring (22) is clamped between the upper clamping block and the lower clamping block, a T-shaped groove is formed in the upper end of the supporting seat, and the lower end of the lower clamping block is clamped in the T-shaped groove.
7. The megawatt wind turbine generator system bearing test bench according to claim 3, further comprising a fixed ring (22) temperature sensor and a rotating ring (21) temperature sensor, wherein the fixed ring (22) temperature sensor is installed on one side of the base (1) close to the fixed ring (22), and the rotating ring (21) temperature sensor is installed on one side of the base (1) close to the rotating ring (21).
8. A megawatt wind turbine generator system bearing test stand according to claim 7, characterized in that the output shaft of the gear box (63) is provided with an electrical slip ring (7) connected with the temperature sensor of the rotating ring (21), the electrical slip ring (7) being arranged at the center of the base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123160618.9U CN218496409U (en) | 2021-12-15 | 2021-12-15 | Bearing test bench for megawatt wind generating set |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123160618.9U CN218496409U (en) | 2021-12-15 | 2021-12-15 | Bearing test bench for megawatt wind generating set |
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| CN218496409U true CN218496409U (en) | 2023-02-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118513834A (en) * | 2024-07-22 | 2024-08-20 | 河北智昆精密传动科技有限公司 | Automatic bearing preload mechanism |
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2021
- 2021-12-15 CN CN202123160618.9U patent/CN218496409U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118513834A (en) * | 2024-07-22 | 2024-08-20 | 河北智昆精密传动科技有限公司 | Automatic bearing preload mechanism |
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