CN201773000U - Bearing life reliability testing device - Google Patents
Bearing life reliability testing device Download PDFInfo
- Publication number
- CN201773000U CN201773000U CN2010201985188U CN201020198518U CN201773000U CN 201773000 U CN201773000 U CN 201773000U CN 2010201985188 U CN2010201985188 U CN 2010201985188U CN 201020198518 U CN201020198518 U CN 201020198518U CN 201773000 U CN201773000 U CN 201773000U
- Authority
- CN
- China
- Prior art keywords
- load structure
- drift
- bearing
- bearing life
- life reliability
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The utility model discloses a bearing life reliability testing device, which solves the problems that the conventional bearing tester cannot well simulate an actual working condition of a bearing and the tested data has low accuracy. The adopted technical measure is that: the bearing life reliability testing device comprises a frame, a mounting base arranged on the frame, a rotating shaft extending into the mounting base, and a radial load structure arranged on the frame, wherein the radial load structure and the rotating shaft are coupled through a driving belt; and the bearing life reliability testing device is characterized in that: a sealed box is arranged on the periphery of the mounting base, and a heating element and a temperature sensor are arranged inside the sealed box.
Description
Technical field
The utility model belongs to technical field of bearings, relates in particular to a kind of bearing life reliability test to detecting the serviceable life of bearing.
Background technology
Bearing is a standardization, the high product of degree of specialization, the working condition complexity, even sometimes profile is done equally even precision is done to such an extent that very high also may not be certain can reach actual requirement, must there be some special detection testing equipment simulated conditions to test and examine it whether to reach required technical requirement.The detection testing equipment that has at present is exactly general testing equipments such as reliability of service life strenuous test basically, and a lot of special-purpose testing equipments still are blank.
Disclose a kind of large bearing testing machine in China's utility application (200910307666.0), its structure is made up of test unit, loading unit, driver element, control module, hydraulic power unit and worktable.Loading unit, driver element and control module are installed on the worktable, test unit is arranged on the loading unit, hydraulic power unit is placed on the back of worktable, links to each other with loading unit, and control module is complementary with test unit, loading unit, driver element, hydraulic power unit respectively.The large size bearing of test unit installation test; loading unit applies radial load and upsetting moment to test bearing; driver element is with the rotating speed and the rotation of torque actuated test bearing of regulation, and control module control electric operation and protection, monitoring test operation, analytical test process and result also feed back in good time.This bearing life reliability test is carrying out in the testing process tested bearing, just tested bearing is applied radial load, and tested bearing is not applied axial load.And bearing in the course of the work, its stressing conditions is comparatively complicated, bearing both can be subjected to radial force, can be subjected to axial force again, if when bearing (particularly some special bearings) being detected test, only it is applied radial load or only it is applied axial load, can not reflect the serviceable life of tested bearing reality well.In addition, because mount pad exposes in the external world, this testing machine can not simulate the temperature conditions of bearing under actual condition well, institute's test for data poor accuracy.
The utility model content
For overcoming the above-mentioned defective that existing bearing life reliability test is had, the utility model technical issues that need to address are: a kind of bearing life reliability test is provided, it can simulate the actual condition of bearing well, and is accurate to the test figure of tested bearing.
For solving the problems of the technologies described above, the technical solution of the utility model: a kind of bearing life reliability test, comprise frame, be located at the mount pad on the frame and extend into the mount pad place rotation axis, be located at the radial load structure on the frame, connect by driving-belt between radial load structure and the rotation axis, it is characterized in that, described mount pad periphery is provided with closed box, is provided with heating element and temperature sensor in closed box.Wherein, the radial load structure is positioned at the below of rotation axis, is connected in driving-belt between radial load structure and the rotation axis perpendicular to rotation axis, determines to be applied to radial force on the rotation axis by the tensioning degree of driving-belt.Tested bearing is mounted in the mount pad, the inner ring of tested bearing and rotation axis wringing fit, and the outer ring is fixed on the mount pad.After being subjected to radial force that driving-belt applies on the rotation axis, this radial force can the inner ring of the present tested bearing of final body on, when tested bearing rotates, can be subjected to radial load under the drive of rotation axis.The radial load structure can be to be fixed on the frame, also can on frame, have upper and lower to the slip of certain amplitude.When the radial load structure was fixed on the frame, the suffered radial load of tested bearing was generally fixed, and this can detect respectively the different batches of same specification bearing; If connects for movable between radial load structure and the frame, the rate of tension that can regulate driving-belt when the radial load structure is slided on frame, thus change acts on the size of radial load on the tested bearing, and this can detect the bearing of different size.Described closed box closes mount pad, be provided with closed box, and heating element is set in closed box, can simulate temperature under the actual condition for tested bearing, the design temperature sensor is used to survey the actual temperature in the closed box, so that the work that the controller of external is determined heating element in real time whether, the temperature in the closed box is remained on the temperature of setting.Noise and outer ring temperature that the judgement of tested bearing failure is produced can be by bearing working the time are determined, for this basis for estimation, can come relevant data are gathered by corresponding sensor is set, and corresponding data is handled by controller, hold whether to lose efficacy with auto-alignment and judge, thus the actual life that draws bearing.
As preferably, in described closed box, be provided with the noise collector, on described mount pad, be provided with thermopair.The noise collector can be stethoscope, is used for gathering tested bearing at sound that testing process produced; Thermopair can be K type thermopair, and it is arranged on the mount pad, and contacts with the outer ring of tested bearing, is used for detecting the temperature that tested bearing is produced in the testing process outer ring.The noise collector all is connected with controller with thermopair, after bearing is because of fatigue wear, can produce bigger noise, the outer ring of bearing can produce high temperature, when noise and bearing outer ring temperature reach in the controller set definite value, controller can instruct alarm work, makes the operator obtain the information that the target bearing has damaged, and then draws the actual life of tested target bearing.
As preferably, on described mount pad, be provided with mounting hole with step surface, removably be connected with the bowl-type platen in the outside of mounting hole.Tested bearing is to be installed in the mounting hole, one end face of tested bearing outer ring and the step surface on the described mounting hole fit, the inner face of the other end of outer ring and bowl-type platen fits, platen generally is fixing by realizing between fastening bolt and the mount pad, under the acting in conjunction of step surface and platen inner face, tested bearing can very stably remain in the mount pad.
As preferably, on frame, be provided with the axial load structure, the axial load structure comprises drift and actuating unit, under the drive of actuating unit, the end of drift can apply axial load to rotation axis.Axial load structure and rotation axis are arranged in same horizontal position, described rotation axis and drift generally are coaxial arrangement, under the drive of axial load structure medium power mechanism, drift can apply axial force to rotation axis, this axial force finally can be applied on the inner ring of tested bearing by rotation axis, thereby can produce axial load on tested bearing.
As preferably, described actuating unit comprises axial direction electric machine and is located at rotating disk in the axial direction electric machine rotating shaft, and be provided with connecting rod between drift and the rotating disk, an end of connecting rod is hinged on the rotating disk prejudicially, and the other end of connecting rod connects with the drift activity.When rotating disk rotates under the drive of axial direction electric machine, can make connecting rod reciprocating, and drive drift and rotation axis is applied axial force, thereby apply axial load for tested bearing in the mode of pulse towards the drift direction, simple in structure.
As preferably, described axial load structure also comprises two slide bars that be arranged in parallel, and two slide bar branches are listed in the both sides of drift, and drift is fixedly connected on the drift connector, and the two ends of drift connector are respectively equipped with sliding sleeve, and two sliding sleeves are socketed on the slide bar respectively.Drift is connected on the drift connector, and the two ends of drift connector are respectively equipped with the sliding sleeve sliding bar mechanism, and drift is stable in motion process, and guidance quality is good.
As preferably, described axial load structure also comprises transition axis, transition axis is between connecting rod and drift, transition axis is fixedly connected on the transition axis connector, the two ends of transition axis connector are respectively equipped with sliding sleeve, two sliding sleeves are socketed in respectively on described two slide bars, and transition axis and drift are provided with spring between the mutually close both ends, and the other end clasp joint of described connecting rod is on transition axis.Come transferring power by the spring between drift and the transition axis, the elastic force of spring makes drift be close to rotation axis all the time on the one hand, what the force of compression by spring made that drift imposes on rotation axis on the other hand is flexible axial load, avoid bearing to bear direct shock load, realistic working condition.
As preferably, described axial load structure is a quadruplet, their shared cover actuating units, and the axial load structure of every cover is corresponding to a cover radial load structure.This quadruplet axial load structure is all horizontally disposed on the platen of frame, their shared cover actuating units, and simple in structure, compactedness is good, more can meet the working method of drift, helps reducing the vibration of test unit integral body.
As preferably, described quadruplet radial load structure is divided into two groups, and one group of radial load structure links by driving-belt and a radial motor.One group of radial load structure is arranged on the homonymy of frame, and they link by driving-belt and a radial motor, and are simple in structure, compact.
As preferably, be provided with linear bearing between described radial load structure and the frame, on the radial load structure, be hung with scale pan.Can change the position of radial load structure on frame by the mode of plus-minus counterweight on the scale pan, thereby the rate of tension of driving-belt between control radial load structure and the rotation axis, and then change the suffered radial load of rotation axis, improved the scope of application of this testing machine.
Therefore, the beneficial effects of the utility model: owing to closed box is set in the periphery of mount pad, this closed box can close mount pad, thereby build the environment of a sealing for tested bearing, tested bearing is subjected to external influence little, makes the residing environment of tested bearing and the environment for use of reality adapt.Be provided with heating element in closed box, this heating element can be the heating of closed box inside, thereby can build the temperature environment that matches with actual environment for use for bearing as required, makes the resulting detection data accuracy of this test unit height.
Description of drawings
Accompanying drawing 1 is that the master of the utility model bearing life reliability test looks partial sectional view.
Accompanying drawing 2 is vertical views that the utility model bearing life reliability test is removed closed box.
Accompanying drawing 3 is left views that the utility model bearing life reliability test is removed closed box.
Accompanying drawing 4 is the amplification views that are equipped with the mount pad of tested bearing.
Embodiment
See among the figure that the structure of the utility model bearing life reliability test comprises frame 1, is located at radial load structure 2 and axial load structure on the frame 1.Be provided with mount pad 6 on frame 1, mount pad 6 is used to install tested bearing 5.Also be provided with rotation axis 3 on the frame 1, rotation axis 3 is a cantilever design, and the free end of rotation axis 3 extend into the position of mount pad 6.Radial load structure 2 is arranged on the below of rotation axis 3, links by driving-belt 11 between radial load structure 2 and the rotation axis 3.On mount pad 6, be provided with mounting hole with step surface, after tested bearing 5 is installed in the mounting hole, on mount pad 6, be provided with the platen 23 of bowl-type in the outside of tested bearing 5, platen 23 is fixed on the mount pad 6 by fastening bolt, and the inner face of platen 23 is used to push down the outer face of tested bearing 5 outer rings.The free end of rotation axis 3 extend in the mounting hole, wringing fit between the inner ring of tested bearing and the rotation axis 3.
Described axial load structure is in the mode of pulse the free end of rotation axis 3 to be applied axial force, and the axial load structure is not to be continuously applied axial force to this end of rotation axis 3.The structure of axial load structure comprise drift 7 and with drift 7 joining actuating units, drift 7 and rotation axis 3 coaxial settings, the dynamic action of actuating unit and then act on the rotation axis 3 on drift 7.The structure of actuating unit comprises axial direction electric machine 21 and the rotating disk 10 that is fixedly connected in the axial direction electric machine rotating shaft 22, and rotating disk 10 is in the form of annular discs.Be provided with connecting rod 9 between rotating disk 10 and the drift 7, one end of connecting rod 9 is hinged on the rotating disk 10 prejudicially, is provided with transition axis 8 between connecting rod 9 and drift 7, transition axis 8 also with rotation axis 3 coaxial settings, the other end of connecting rod 9 is hook-shaped, and the hook-shaped end clasp joint of connecting rod 9 is in the end of transition axis 8.On frame 1, be provided with the both sides that 18, two slide bars of two slide bars that are arranged in parallel were listed in drift 7 and transition axis 8 in 18 minutes.Drift 7 is fixedly connected on the drift connector 19, is provided with 17, two sliding sleeves 17 of sliding sleeve respectively at the both ends of drift connector 19 and is socketed in slidably respectively on described two slide bars 18.Transition axis 8 is fixedly connected on the transition axis connector 20, and the both ends of transition axis connector 20 are provided with 17, two sliding sleeves 17 of sliding sleeve respectively and are socketed in slidably respectively on described two slide bars 18.Drift 7 and transition axis 8 axially between have the gap, acting force between transition axis 8 and the drift 7 is realized transmitting by spring 12, the two ends that are spring 12 are socketed in transition axis 8 and drift 7 mutual close both ends respectively, and the two ends of spring 12 act on respectively on transition axis connector 20 and the drift connector 19.Under the effect of spring 12, drift 7 fits together with rotation axis 3 mutually close ends regularly.
The axial load structure is a quadruplet, their shared cover actuating units, and the outside of axial direction electric machine 21 is all stretched out at the two ends of correspondingly described axial direction electric machine rotating shaft 22, is fixed with a described rotating disk 10 on two external parts of axial direction electric machine rotating shaft 22 respectively.Two connecting rods 9 in the axial load structure of two covers at an external part place of axial direction electric machine rotating shaft 22 are identical with the pin joint position on the rotating disk 10.Corresponding with quadruplet axial load structure, described radial load structure 2 also is a quadruplet, and radial load structure 2 is corresponding one by one with the axial load structure.Quadruplet radial load structure 2 is divided into two groups, every group of radial load structure 2 is positioned at the homonymy of an external part of axial direction electric machine rotating shaft 22, one group of radial load structure 2 shared radial motor 15, radial motor 15 is located at the below of axial direction electric machine 21, links by driving-belt 11 between radial motor 15 and the radial load structure 2.
Described radial load structure 2 is positioned at the below of axial load structure, is provided with linear bearing 16 between radial load structure 2 and frame 1, is hung with scale pan 13 below radial load structure 2, can be provided with counterweight 14 on the scale pan 13.Be connected with driving-belt 11 between radial load structure 2 and the rotation axis 3, by plus-minus counterweight 14 on scale pan 13, can change the distance between radial load structure 2 and the rotation axis 3, this can change the rate of tension that is connected in the driving-belt 11 between rotation axis 3 and the radial load structure 2, thereby can change the radial force of rotation axis 3, and then change the suffered radial load of tested bearing 5.
Periphery in mount pad 6 on frame 1 is provided with closed box 4, and rotation axis 3 and drift 7 extend in the closed box 4.Be provided with heating plate and temperature sensor in the closed box 4, heating plate is used for closed box 4 inside are heated, and temperature sensor is used for the temperature in the perception closed box 4.Heating plate all is connected with the controller of external with temperature sensor, and controller is according to the temperature signal that temperature sensor perceived, and whether determines heating plate work.When the temperature in the closed box 4 was higher than preset temperature, temperature sensor passed to controller to the temperature signal that perceives, and controller instruction heating plate quits work; When the temperature in the closed box 4 was lower than preset temperature, temperature sensor passed to controller to the temperature signal that perceives, and the work of controller instruction heating plate is treated to instruct heating plate to quit work again when closed box 4 interior temperature reach setting value.
Can adopt dual mode for the bearing failure judgement, a kind of is operative employee's sense organ judgement, and another kind is automatic judgement, and what adopt under the normal condition is automatic judgment mode.Noise collector and thermopair promptly are set in closed box 4, and the noise collector is generally selected stethoscope for use, and thermopair is generally selected K type thermopair for use.Bearing is when long-time running fatigue failure, and the channel surface of the inside and outside circle of bearing occurs peeling off or plastic yield, and peeling off appears in steel ball surface, and bearing can produce bigger noise after continuing motion, and because of the increase of friction force, and the temperature of tested bearing 5 is raise.
The noise collector is connected with above-mentioned controller, when the noise in the noise closed box that collector collects 4 is higher than the mxm. that sets in the controller, controller can instruct near alarms (as pilot lamp or the hummer) the work corresponding mount pad 6 be located at, thereby can remind the operative employee that corresponding tested bearing 5 has been in failure state, and then draw the actual life of corresponding bearing.
Thermopair is located on the mount pad 6, and the outer ring of thermopair and tested bearing 5 contacts, and is used for the temperature of the tested bearing of perception 5 outer rings, and thermopair is connected with above-mentioned controller.When thermopair institute sense temperature is higher than the mxm. that sets in the controller, near the alarm work the corresponding mount pad 6 is located in the controller instruction, thereby can remind the operative employee that corresponding tested bearing 5 has been in failure state, and then detect the actual life of corresponding bearing.
Claims (10)
1. bearing life reliability test, comprise frame, be located at the mount pad on the frame and extend into the mount pad place rotation axis, be located at the radial load structure on the frame, connect by driving-belt between radial load structure and the rotation axis, it is characterized in that, described mount pad (6) periphery is provided with closed box (4), is provided with heating element and temperature sensor in closed box (4).
2. bearing life reliability test according to claim 1 is characterized in that, is provided with the noise collector in described closed box (4), is provided with thermopair on described mount pad (6).
3. bearing life reliability test according to claim 1 is characterized in that, is provided with the mounting hole with step surface on described mount pad (6), removably is connected with bowl-type platen (23) in the outside of mounting hole.
4. according to claim 1,2 or 3 described bearing life reliability tests, it is characterized in that be provided with the axial load structure on frame (1), the axial load structure comprises drift (7) and actuating unit.
5. bearing life reliability test according to claim 4, it is characterized in that, described actuating unit comprises axial direction electric machine (21) and is located at rotating disk (10) in the axial direction electric machine rotating shaft (22), be provided with connecting rod (9) between drift (7) and the rotating disk (10), one end of connecting rod (9) is hinged on the rotating disk (10) prejudicially, and the other end of connecting rod (9) connects with drift (7) is movable.
6. bearing life reliability test according to claim 5, it is characterized in that, described axial load structure also comprises two slide bars that be arranged in parallel (18), two slide bars (18) divide the both sides that are listed in drift (7), drift (7) is fixedly connected on the drift connector (19), the two ends of drift connector (19) are respectively equipped with sliding sleeve (17), and two sliding sleeves (17) are socketed in respectively on the slide bar (18).
7. bearing life reliability test according to claim 6, it is characterized in that, described axial load structure also comprises transition axis (8), transition axis (8) is positioned between connecting rod (9) and the drift (7), transition axis (8) is fixedly connected on the transition axis connector (20), the two ends of transition axis connector (20) are respectively equipped with sliding sleeve (17), two sliding sleeves (17) are socketed in respectively on described two slide bars (18), transition axis (8) and drift (7) are provided with spring (12) between the mutually close both ends, and the other end clasp joint of described connecting rod (9) is on transition axis (8).
8. bearing life reliability test according to claim 4 is characterized in that, described axial load structure is a quadruplet, their shared cover actuating units, and the axial load structure of every cover is corresponding to a cover radial load structure (2).
9. bearing life reliability test according to claim 8 is characterized in that, described quadruplet radial load structure (2) is divided into two groups, and one group of radial load structure (2) links by a driving-belt (11) and a radial motor (15).
10. according to claim 1,2 or 3 described bearing life reliability tests, it is characterized in that, be provided with linear bearing (16) between described radial load structure (2) and the frame (1), on radial load structure (2), be hung with scale pan (13).
?
?
?
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201985188U CN201773000U (en) | 2010-05-21 | 2010-05-21 | Bearing life reliability testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201985188U CN201773000U (en) | 2010-05-21 | 2010-05-21 | Bearing life reliability testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201773000U true CN201773000U (en) | 2011-03-23 |
Family
ID=43752848
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201985188U Expired - Fee Related CN201773000U (en) | 2010-05-21 | 2010-05-21 | Bearing life reliability testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201773000U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901628A (en) * | 2012-09-18 | 2013-01-30 | 上海摩士精密轴承制造有限公司 | High accuracy miniature bearing service life test device |
| CN102944424A (en) * | 2012-11-23 | 2013-02-27 | 宁波新大地轴承有限公司 | Testing device of bearing service life |
| CN104165768A (en) * | 2014-09-04 | 2014-11-26 | 大连理工大学 | Bearing integrated dynamic performance test device and method |
| CN105738113A (en) * | 2016-04-29 | 2016-07-06 | 新昌县羽林街道全顺轴承厂 | Multifunctional bearing testing device |
| CN106840673A (en) * | 2017-02-17 | 2017-06-13 | 武汉理工大学 | Marine diesel slides base bearing pyroelectric signal caliberating device and scaling method |
-
2010
- 2010-05-21 CN CN2010201985188U patent/CN201773000U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102901628A (en) * | 2012-09-18 | 2013-01-30 | 上海摩士精密轴承制造有限公司 | High accuracy miniature bearing service life test device |
| CN102901628B (en) * | 2012-09-18 | 2015-05-06 | 上海摩士精密轴承制造有限公司 | High accuracy miniature bearing service life test device |
| CN102944424A (en) * | 2012-11-23 | 2013-02-27 | 宁波新大地轴承有限公司 | Testing device of bearing service life |
| CN102944424B (en) * | 2012-11-23 | 2015-07-08 | 宁波新大地轴承有限公司 | Testing device of bearing service life |
| CN104165768A (en) * | 2014-09-04 | 2014-11-26 | 大连理工大学 | Bearing integrated dynamic performance test device and method |
| CN105738113A (en) * | 2016-04-29 | 2016-07-06 | 新昌县羽林街道全顺轴承厂 | Multifunctional bearing testing device |
| CN105738113B (en) * | 2016-04-29 | 2019-06-14 | 上海珏合金属科技有限公司 | A kind of multifunction bearing detection device |
| CN106840673A (en) * | 2017-02-17 | 2017-06-13 | 武汉理工大学 | Marine diesel slides base bearing pyroelectric signal caliberating device and scaling method |
| CN106840673B (en) * | 2017-02-17 | 2019-03-26 | 武汉理工大学 | Marine diesel slides base bearing pyroelectric signal caliberating device and scaling method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102072816B (en) | Bearing tester | |
| CN201773000U (en) | Bearing life reliability testing device | |
| CN107024353A (en) | A kind of sealed bearings combination property simulation test machine | |
| CN100593702C (en) | Helicopter automatic tilting device large-sized thin-wall bearing intelligent checking analytical method and device | |
| CN102636348B (en) | High speed bearing tester | |
| CN103604606A (en) | Sliding bearing testing machine | |
| CN109459240A (en) | A kind of bearing tester | |
| CN102620935A (en) | Loading device of high-speed bearing tester | |
| CN105699081A (en) | Bearing shaft current damage comprehensive performance test device | |
| CN105675293B (en) | Testing tool and system for pitch-variable toothed belt of wind generating set | |
| CN111413235B (en) | Pin-disc type synergistic friction and wear testing device and testing method thereof | |
| CN105841963B (en) | A kind of friction-loaded brake type bearing running testing stand | |
| CN218937792U (en) | Brake pad brake disc performance detection equipment | |
| CN112033678A (en) | Bearing simulation loading test device and method | |
| CN109238741A (en) | A kind of automation durability test equipment | |
| CN116046387A (en) | General durability testing machine and testing method for hub bearing unit | |
| CN114720119A (en) | Comprehensive fault simulation test bed considering multidirectional loading working condition for plate and strip rolling mill | |
| CN205620130U (en) | Friction loading braking formula bearing running -in test platform | |
| CN101699243B (en) | Machine for testing reliability of service life of electromagnetic clutch bearing of automotive air conditioner | |
| CN219977767U (en) | Spliced railway bearing fault diagnosis test bed | |
| CN102879288A (en) | Testing machine for oil seal abrasion resistance | |
| CN102288403B (en) | Tensioning wheel torque test device | |
| CN202837126U (en) | Oil seal abrasion resistance tester | |
| CN214584034U (en) | Bearing fault diagnosis experiment table | |
| CN113029568B (en) | Bearing life test system and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110323 Termination date: 20130521 |