CN108760311A - A kind of thrust ball bearing fatigue life experimental provision under vacuum environment - Google Patents
A kind of thrust ball bearing fatigue life experimental provision under vacuum environment Download PDFInfo
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- CN108760311A CN108760311A CN201810741846.9A CN201810741846A CN108760311A CN 108760311 A CN108760311 A CN 108760311A CN 201810741846 A CN201810741846 A CN 201810741846A CN 108760311 A CN108760311 A CN 108760311A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
- G01M13/04—Bearings
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- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to a kind of thrust ball bearing fatigue life experimental provisions under vacuum environment, including loading system, test system, pumped vacuum systems；Loading system includes rack, driving device, it is fixed with experiment set in rack and the testing stand for being adapted to and sliding cooperation with it in experiment set is set, compressed spring is equipped with below testing stand, driving device includes driving spindle, driving spindle stretches into vacuum test chamber across device for sealing magnetic fluid, compressed spring applies axial load to test bearing, and driving device applies turning power to test bearing, and being marked with test oil above the inherent testing stand of experiment set makes test bearing be immersed in test oil.Thrust ball bearing fatigue life experimental provision provided by the present invention under vacuum environment can simulate the operation of thrust ball bearing under vacuum conditions, obtain good test effect.
Description
Technical field
The present invention relates to a kind of thrust ball bearing fatigue life experimental provisions under vacuum environment.
Background technology
Bearing is a kind of important spare part in contemporary mechanical equipment.Its major function is the mechanical rotary body of support, is reduced
Friction coefficient in its motion process, and ensure its rotating accuracy.Technology and the more keyholed back plates of X-ray tube, radar, big work(in cosmic space
Vacuum shaft is needed to make bearing in all kinds of vacuum plants such as rate frequency agile magnetron.Thrust ball bearing uses the when of running at high speed that can hold
It is designed by thrust load, is made of the washer-shaped lasso of the raceway ditch rolled with ball, is also often used as vacuum operating bearing.
As people deepen continuously to bearing research, fatigue life and its reliability have caused each as the most important performance of bearing
The extensive concern of Production of bearing unit and associated user.But since the factor for influencing its fatigue life adds bearing fatigue too much
Service life theory still need to it is perfect, carry out life test undoubtedly become evaluate this index unique effective way.Low load, high rotating speed
Conventional life test method is time-consuming and laborious and the poor reliability of test result, and advanced bearing fatigue life strenuous test
The use of machine and test method just starts to walk in China, and application range needs further to be expanded.
Patent CN200810243076.1 discloses a kind of high-speed angular contact ball bearing fatigue life testing apparatus, the device
Realize that high-frequency electric machines variable speed, transmission shaft drive angular contact ball bearing high speed rotation under certain pretightning force by frequency converter,
Load axial pre tightening force is adjusted using counterweight, carries out the angular contact ball bearing fatigue life test under various rotating speeds, load working condition.
Patent CN201610098280.3 discloses a kind of oil immersed type rolling bearing life strenuous test machine, and it is φ 10- to be suitable for internal diameter
The rolling bearing life strenuous test of 60mm, including rack, stirring recharging oil device, test head assembly, transmission system, load system
System, signal amplifier, temperature sensor, vibrating sensor and computer supervisory control system.Loading system, test head assembly, stirring
Recharging oil device and transmission system are each attached in rack；Transmission system is connected with test head assembly；Loading system can be to testing axis
Hold load radial load and axial load；Test head assembly is equipped with temperature sensor and vibrating sensor, is amplified by signal
Device is connected with computer supervisory control system.When computer supervisory control system shows test bearing temperature, vibration values, rotating speed, accumulative experiment
Between, vibration time domain and frequency domain figure, test bearing temperature value or vibration values are crossed the border autostop.Above-mentioned bearing tester can not fit
Fatigue life test for the thrust ball bearing applied under vacuum environment.
Invention content
The purpose of the invention is to overcome shortcoming and defect of the existing technology, and provide a kind of for vacuum environment
Under thrust ball bearing fatigue life experimental provision.
The technical solution used in the present invention is as follows：A kind of thrust ball bearing fatigue life experiment under vacuum environment
Device, including loading system, test system, pumped vacuum systems；
The loading system includes rack, driving device, be fixed in the rack experiment set and be arranged experiment set in
It is adapted to and the testing stand of sliding cooperation, is equipped with compressed spring below the testing stand, the frame upper end is connected with magnetic fluid
Sealing device, the driving device include driving spindle, and the driving spindle stretches into vacuum across the device for sealing magnetic fluid
The end of test chamber, the driving spindle is equipped with bearing block, and it is recessed that the bearing block bottom is equipped with the limit being adapted to test bearing
Slot, the test bearing are arranged between testing stand and bearing block, and the compressed spring applies axial carry to the test bearing
Lotus, the driving device apply turning power to the test bearing, and being marked with test oil above the inherent testing stand of experiment set makes
Test bearing is immersed in test oil；
The test system includes torsion-testing sensor and data recording equipment；
The pumped vacuum systems includes vacuum pump, vacuum meter, and the vacuum pump is connected to the inner cavity of the rack, makes it be after startup
Vacuum condition.
It is equipped with closing inner chamber in the bearing block, thermocouple is equipped in the closing inner chamber.
It is equipped with closing inner chamber in the bearing block, displacement sensor is equipped in the closing inner chamber.
It is fixed with supporting rack in the rack, adjusting nut is threaded on support frame as described above, the compressed spring is set
It sets between adjusting nut and testing stand.
The testing stand bottom is equipped with spring retainer groove, and spring limiting part, the compression are equipped in the spring retainer groove
Both ends of the spring is respectively held against spring limiting part and adjusting nut.
The testing stand side wall is equipped with o-ring groove, and sealing ring is equipped between the testing stand and experiment set.
The test oil is fluoromethane phenyl silicone oil, one kind of fluoropropyl chlorphenyl silicone oil.
Beneficial effects of the present invention are as follows：Thrust ball bearing fatigue life provided by the present invention under vacuum environment
Experimental provision can simulate the operation of thrust ball bearing under vacuum conditions, obtain good test effect.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, according to
These attached drawings obtain other attached drawings and still fall within scope of the invention.
Fig. 1 is the connection diagram of thrust ball bearing fatigue life experimental provision；
Fig. 2 is the structural schematic diagram of loading system；
Fig. 3 is the enlarged diagram of A in Fig. 2；
Fig. 4 is the enlarged diagram of B in Fig. 2；
In figure, 1, rack；2, experiment set；3, testing stand；301, spring retainer groove；302, spring limiting part；303, sealing ring is recessed
Slot；304, sealing ring；4, test bearing；6, torsion-testing sensor；7, vacuum pump；8, vacuum meter；9, compressed spring；10, magnetic
Fluid seal apparatus；11, driving device；1101, driving spindle；1102, bearing block；1103, closing inner chamber；1104, driving electricity
Machine；1105；12, supporting rack；13, adjusting nut；14, data recording equipment.
Specific implementation mode
To make the object, technical solutions and advantages of the present invention clearer, the present invention is made into one below in conjunction with attached drawing
Step ground detailed description.
The direction and position term that the present invention is previously mentioned, for example, "upper", "lower", "front", "rear", "left", "right", "inner", "
Outside ", " top ", " bottom ", " side " etc. are only the direction or position of refer to the attached drawing.Therefore, the direction used and position term
It is to illustrate and understand the present invention rather than limiting the scope of the invention.
As shown in Figure 1, a kind of thrust ball bearing fatigue life experimental provision under vacuum environment, including load system
System, test system, pumped vacuum systems；
As shown in Fig. 2, the loading system includes rack 1, driving device 11, it is fixed with experiment set 2 in the rack 1 and sets
The testing stand 3 for being adapted to and sliding cooperation with it in experiment set 2 is set, 3 lower section of the testing stand is equipped with compressed spring 9, the machine
1 upper end of frame is connected with device for sealing magnetic fluid 10, and the driving device 11 includes driving spindle 1101, the driving spindle 1101
Vacuum test chamber 2 is stretched into across the device for sealing magnetic fluid 10, the end of the driving spindle 1101 is equipped with bearing block 1102,
1102 bottom of the bearing block is equipped with the limiting groove being adapted to test bearing 4, and the test bearing 4 is arranged in 3 He of testing stand
Between bearing block 1102, the compressed spring 9 applies axial load to the test bearing 4, and the driving device 3 is to the survey
It tries bearing 4 and applies turning power, being marked with test oil above testing stand 3 in the experiment set 2 makes test bearing 4 be immersed in test oil
In；
The test system includes torsion-testing sensor 6 and data recording equipment 14；
The pumped vacuum systems includes vacuum pump 7, vacuum meter 8, and the vacuum pump 7 is connected to the inner cavity of the rack 1, makes after startup
It is vacuum condition, and in Fig. 2, three directions that pumped vacuum systems is indicated from arrow are vacuumized.
Test bearing 4 is placed between testing stand 3 and bearing block 1102, test oil, driving is selected to make driving spindle
1101 high speed rotations, and record rotating speed, while the torque of 6 test bearing of torsion-testing sensor and being recorded in data recording equipment
14, test bearing can be carried out in corresponding vacuum degree, test oil for transmission to rotating speed, torque data in computer, is then shown
The analysis of middle fatigue life.1101 top of driving spindle is connected with driving motor 1104, and the driving motor 1104 passes through motor
Holder 1105 is fixed on device for sealing magnetic fluid 10, overcomes the gravity of itself of driving spindle 1101 is axial to test bearing 4 to carry
The influence of lotus size, can also be by the bearing support that is driven by belt.
Torsion-testing sensor 6 is cantilevered torque measurement, including foil gauge.Bearing block 1102 can with driving spindle 1101
Think and be detachably connected, such bearing block 1102 can carry out replacing adaptation according to the specification of test bearing.
It is equipped with closing inner chamber 1103 in the bearing block 1102, thermocouple is equipped in the closing inner chamber 1103.Thermocouple
Temperature for detecting bearing, during bearing runs at high speed, the temperature of bearing can be increased, by analyzing bearing
Temperature and obtained torque data, can carry out the analysis of fatigue life, obtain intermediate relationship.
It is equipped with closing inner chamber 1103 in the bearing block 1102, displacement sensor is equipped in the closing inner chamber 1103.Position
Displacement sensor is used to detect the displacement of bearing, and bearing is immersed in test oil, can form oil film during running at high speed, pass through
Detect the microdisplacement of bearing, it can be deduced that the formational situation of oil film, to the lubricant effect of evaluation test oil.
As shown in figure 3, being fixed with supporting rack 12 in the rack 1, adjusting nut is threaded on support frame as described above 12
13, the compressed spring 9 is arranged between adjusting nut 13 and testing stand 3.Logical selection adjusting nut 13 can adjust compression bullet
The pretightning force of spring, to adjust the axial load size of test bearing.3 bottom of the testing stand is equipped with spring retainer groove 301, institute
It states and is equipped with spring limiting part 302 in spring retainer groove 301,9 both ends of the compressed spring are respectively held against spring limiting part 302 and adjust
Save nut 13.It prevents compressed spring 9 from tilting, compressed spring 9 is made to form deviation to the axial load of test bearing.
3 side wall of the testing stand is equipped with o-ring groove 303, and sealing ring is equipped between the testing stand 3 and experiment set 2
304.The leakproofness between testing stand 3 and experiment set 2 is improved, prevents test oil from leaking.
The test oil is fluoromethane phenyl silicone oil, one kind of fluoropropyl chlorphenyl silicone oil.
Life test is carried out using by 51104 type thrust ball bearings of SUJ2 steel makings.Inner ring is set to experiment
On platform 3, outer ring is connected in driving spindle 1101.Load is applied by two compressed springs.For accelerated life test, ball
Quantity is reduced to 3 from 14.Bearing rotating speed is 250 revs/min.The axial load of 4.4 kN is applied by two compressed springs.
Corresponding average pressure is 2.7 GPa.The rated life time L0 that 90 ° of contact angle thrust ball bearings are calculated with standard method is
45.52 hours.With 25 milliliters of test oil, test bearing is immersed in test oil.Before each experiment, set by ultrasonic wave
Standby bearing cleaning, rinses in ethanol, and dry in hot wind.Maximum test period is limited in 336 hours, corresponding 0.5 ×
107.Experiment is in room temperature and atmospheric pressure<5×10-2It is carried out under the vacuum condition of Pa.The outer diameter and internal diameter of test bearing are respectively 35
With 20 mm.A diameter of 5.556 mm of bearing ball.The hardness of the inner ring made of SUJ2 steel, outer ring and ball is respectively 808,
800 and 778 HV.Use three rich Frasror CS-H5000 CNC（Kawasaki, Japan）The surface for measuring inner ring, outer ring and ball is thick
Rugosity arithmetic mean of instantaneous value Ra is respectively 0.044,0.044 and 0.011 μm.Thrust ball bearing number for testing is ABEC 1.
Material is mild steel, 116 HV.Inside and outside circle coincidence rate is 54%.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (7)
1. a kind of thrust ball bearing fatigue life experimental provision under vacuum environment, it is characterised in that：Including loading system,
Test system, pumped vacuum systems；
The loading system includes rack（1）, driving device（11）, the rack（1）Inside it is fixed with experiment set（2）And setting
It is covered in experiment（2）The interior testing stand being adapted to it and slide cooperation（3）, the testing stand（3）Lower section is equipped with compressed spring（9）,
The rack（1）Upper end is connected with device for sealing magnetic fluid（10）, the driving device（11）Including driving spindle（1101）, institute
State driving spindle（1101）Across the device for sealing magnetic fluid（10）Stretch into vacuum test chamber（2）, the driving spindle
（1101）End be equipped with bearing block（1102）, the bearing block（1102）Bottom is equipped with and test bearing（4）The limit of adaptation
Groove, the test bearing（4）It is arranged in testing stand（3）And bearing block（1102）Between, the compressed spring（9）To the survey
Try bearing（4）Apply axial load, the driving device（3）To the test bearing（4）Apply turning power, the experiment set
（2）Inherent testing stand（3）Top, which is marked with test oil, makes test bearing（4）It is immersed in test oil；
The test system includes torsion-testing sensor（6）And data recording equipment（14）；
The pumped vacuum systems includes vacuum pump（7）, vacuum meter（8）, the vacuum pump（7）It is connected to the rack（1）Inner cavity,
It is vacuum condition to make it after startup.
2. the thrust ball bearing fatigue life experimental provision according to claim 1 under vacuum environment, feature exists
In：The bearing block（1102）It is interior to be equipped with closing inner chamber（1103）, the closing inner chamber（1103）It is interior to be equipped with thermocouple.
3. the thrust ball bearing fatigue life experimental provision according to claim 2 under vacuum environment, feature exists
In：The bearing block（1102）It is interior to be equipped with closing inner chamber（1103）, the closing inner chamber（1103）It is interior to be equipped with displacement sensor.
4. the thrust ball bearing fatigue life experimental provision according to claim 1 under vacuum environment, feature exists
In：The rack（1）Inside it is fixed with supporting rack（12）, support frame as described above（12）On be threaded with adjusting nut（13）, described
Compressed spring（9）It is arranged in adjusting nut（13）With testing stand（3）Between.
5. the thrust ball bearing fatigue life experimental provision according to claim 4 under vacuum environment, feature exists
In：The testing stand（3）Bottom is equipped with spring retainer groove（301）, the spring retainer groove（301）It is interior to be equipped with spring limiting part
（302）, the compressed spring（9）Both ends are respectively held against spring limiting part（302）And adjusting nut（13）.
6. the thrust ball bearing fatigue life experimental provision according to claim 1 under vacuum environment, feature exists
In：The testing stand（3）Side wall is equipped with o-ring groove（303）, the testing stand（3）It is covered with experiment（2）Between be equipped with sealing
Circle（304）.
7. the thrust ball bearing fatigue life experimental provision according to claim 1 under vacuum environment, feature exists
In：The test oil is fluoromethane phenyl silicone oil, one kind of fluoropropyl chlorphenyl silicone oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810741846.9A CN108760311A (en) | 2018-07-09 | 2018-07-09 | A kind of thrust ball bearing fatigue life experimental provision under vacuum environment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810741846.9A CN108760311A (en) | 2018-07-09 | 2018-07-09 | A kind of thrust ball bearing fatigue life experimental provision under vacuum environment |
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| CN108760311A true CN108760311A (en) | 2018-11-06 |
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| CN201810741846.9A Pending CN108760311A (en) | 2018-07-09 | 2018-07-09 | A kind of thrust ball bearing fatigue life experimental provision under vacuum environment |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111855206A (en) * | 2020-08-15 | 2020-10-30 | 温岭市微米自动化设备有限公司 | Bearing fatigue detection equipment and detection method thereof |
| CN111896253A (en) * | 2020-07-31 | 2020-11-06 | 沈阳建筑大学 | Multifunctional low-temperature vacuum bearing test bench and test method |
| CN112557033A (en) * | 2020-12-24 | 2021-03-26 | 合肥工业大学 | High-precision thrust ball bearing multi-parameter test platform capable of conveniently disassembling and assembling samples |
| CN114414388A (en) * | 2022-01-21 | 2022-04-29 | 杭州弘晟智能科技有限公司 | Novel magnetofluid dynamic performance testing device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111896253A (en) * | 2020-07-31 | 2020-11-06 | 沈阳建筑大学 | Multifunctional low-temperature vacuum bearing test bench and test method |
| CN111896253B (en) * | 2020-07-31 | 2022-02-25 | 沈阳建筑大学 | Multifunctional low-temperature vacuum bearing test bench and test method |
| CN111855206A (en) * | 2020-08-15 | 2020-10-30 | 温岭市微米自动化设备有限公司 | Bearing fatigue detection equipment and detection method thereof |
| CN112557033A (en) * | 2020-12-24 | 2021-03-26 | 合肥工业大学 | High-precision thrust ball bearing multi-parameter test platform capable of conveniently disassembling and assembling samples |
| CN114414388A (en) * | 2022-01-21 | 2022-04-29 | 杭州弘晟智能科技有限公司 | Novel magnetofluid dynamic performance testing device |
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