CN109357869A - Bearing rotation and radial load combined test device under hot environment - Google Patents
Bearing rotation and radial load combined test device under hot environment Download PDFInfo
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- CN109357869A CN109357869A CN201811196184.8A CN201811196184A CN109357869A CN 109357869 A CN109357869 A CN 109357869A CN 201811196184 A CN201811196184 A CN 201811196184A CN 109357869 A CN109357869 A CN 109357869A
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- bearing
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- connecting plate
- test device
- hot environment
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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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- General Physics & Mathematics (AREA)
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
Abstract
The present invention relates to bearing test technical field, propose that the bearing rotation and radial load combined test device, the experimental rig under a kind of hot environment include support frame, installation axle, connection frame, outline border, radial force application mechanism, high-temperature cabinet and rotary drive mechanism；Installation axle is set on support frame, for installing by test bearing；Connection frame is connected to by the outer ring of test bearing；Outline border is connected to connection frame；Radial force application mechanism is set between outline border and connection frame, applies radial load by test bearing for giving；High-temperature cabinet is set to except connection frame；Rotary drive mechanism is fixed on support frame, is relatively rotated between inner ring and outer ring by test bearing for driving.It can be realized rotation and radial load joint under hot conditions using the experimental rig to apply.
Description
Technical field
The present invention relates under bearing test technical field more particularly to a kind of hot environment bearing rotation and radial load
Combined test device.
Background technique
In Aeronautics and Astronautics, national defence, the operating condition of bearing is all extremely harsh, predominantly high speed, high temperature and heavy duty,
High to reliability requirement, can designing and manufacturing technique reach requirement, need to verify by testing.With to bearing
Test the continuous improvement of understanding of importance, test is increasingly becoming design bearing, an indispensable crucial ring in manufacturing process.
Super speed vehicle needed to carry out used bearing under high temperature environment rotation and radial direction in the design phase
Load Combined Trials grope its performance parameter.And it is domestic at present for the test of this kind of hot conditions lower bearing, it can only complete to turn
Dynamic or radial load single load applies, and can not achieve the coupling load of two kinds of load, this just with the true work of bearings
As situation, there are difference, and in the case of true military service, while rotation, radial load can change bearing, or in radial direction
The timing of load one, rotation situation change, then rotation situation and radial load situation change simultaneously.And environment temperature base
This is not able to satisfy higher and higher test temperature requirement within 800 DEG C.The operating temperature of bearing used in super speed vehicle is got over
Come higher, existing experimental technique and device have been unable to meet requirement.Bearing industry is the basic activity of manufacturing, and again
Big to equip important industry matched with precision assembly manufacturing industry, bearing industry has welcome the peak period of development, therefore, bearing test
The invention of device, the improvement of experimental technique are particularly important.
Above- mentioned information disclosed in the background technology part are only used for reinforcing the understanding to background of the invention, therefore it can
To include the information not constituted to the prior art known to persons of ordinary skill in the art.
Summary of the invention
It is an object of the invention to overcome the single load that can only complete rotation or radial load of the above-mentioned prior art
The deficiency of application provides a kind of bearing rotation and radial load joint rotated and radial load is combined under the hot environment applied
Experimental rig.
Additional aspect and advantage of the invention will be set forth in part in the description, and partly will be from description
It is apparent from, or can practice through the invention and acquistion.
According to one aspect of the disclosure, the bearing rotation under a kind of hot environment and radial load Combined Trials dress are provided
It sets, comprising:
Support frame；
Installation axle is set on support frame as described above, for installing by test bearing；
Frame is connected, the outer ring by test bearing is connected to；
Outline border is connected to the connection frame；
Radial force application mechanism is set between the outline border and connection frame, for applying radial carry by test bearing to described
Lotus；
High-temperature cabinet is set to except the connection frame；
Rotary drive mechanism is fixed on support frame as described above, for drive the inner ring by test bearing and outer ring it
Between relatively rotate.
In a kind of exemplary embodiment of the disclosure, the drive shaft of the rotary drive mechanism and the outline border are hinged,
For driving the outline border, the connection frame, the high-temperature cabinet, the radial force application mechanism and described by the outer of test bearing
Circle rotates jointly.
In a kind of exemplary embodiment of the disclosure, the drive shaft is vertically arranged with the installation axle, and the drive
Moving axis and the installation axle are not in the same plane.
In a kind of exemplary embodiment of the disclosure, the connection frame includes:
The first connecting plate, the second connecting plate, third connecting plate and the 4th connecting plate being sequentially connected end to end；And installation
Seat, mounting base are connected to first connecting plate, second connecting plate, the third connecting plate and the 4th connection
Plate, the interior installation outer ring by test bearing of the mounting base.
In a kind of exemplary embodiment of the disclosure, the outline border includes the first crossbeam being sequentially connected end to end, first
Vertical beam, second cross beam and the second vertical beam.
In a kind of exemplary embodiment of the disclosure, the radial direction force application mechanism is fixed on the first crossbeam, described
Combined test device further include:
First connector is connected between first connecting plate and the radial force application mechanism；
Three the second connectors are correspondingly connected to second connecting plate and first vertical beam, third connecting plate and institute
It states between second cross beam and the 4th connecting plate and second vertical beam.
In a kind of exemplary embodiment of the disclosure, first connector includes:
First fixed plate is connect with first connecting plate；
First connecting rod is vertical in first fixed plate and connect with the radial force application mechanism, described first
The one end of connecting rod connecting with the radial force application mechanism is provided with the first hinge hole.
In a kind of exemplary embodiment of the disclosure, second connector includes:
Second fixed plate is connected with the connection frame；
Second connecting rod is vertical at second fixed plate and connect with the outline border, second connecting rod with
One end of the outline border connection is provided with external screw thread.
In a kind of exemplary embodiment of the disclosure, it is provided with the first strip-shaped hole on first vertical beam, described second
Connecting rod passes through first strip-shaped hole and protrudes from first vertical beam；It is provided with the second strip-shaped hole on second vertical beam,
Second connecting rod penetrates through second strip-shaped hole and protrudes from second vertical beam；Second connector further include:
Fixture nut is threadedly engaged in the external screw thread of second connecting rod.
In a kind of exemplary embodiment of the disclosure, location hole, second connection are provided on the second cross beam
Bar is inserted into the location hole.
As shown from the above technical solution, the present invention has at least one of following advantages and good effect:
Bearing rotation and radial load combined test device under hot environment of the present invention, by radial force application mechanism to quilt
Test bearing applies radial load, realizes radial loaded；Meanwhile by rotary drive mechanism driving by the inner ring of test bearing with
It is relatively rotated between outer ring, realizes bearing rotation；To realize that the joint of rotation and radial load applies.Moreover, passing through simultaneously
High-temperature cabinet realizes that the joint of rotation and radial load under hot conditions applies to bearing heating.
Detailed description of the invention
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become
It is more obvious.
Fig. 1 is the structure of the bearing rotation and one embodiment of radial load combined test device under hot environment of the present invention
Schematic diagram.
The reference numerals are as follows for main element in figure:
1, by test bearing；
21, bottom plate；22, support plate；23, mounting plate；
3, installation axle；
41, the first connecting plate；42, the second connecting plate；43, third connecting plate；44, mounting base；
51, first crossbeam；52, the first vertical beam；53, second cross beam；54, the second vertical beam；
6, radial force application mechanism；
71, the first fixed plate；72, first connecting rod；
8, rotary drive mechanism；
91, the second fixed plate；92, the second connecting rod；
10, high-temperature cabinet；
11, fixture nut.
Specific embodiment
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes
Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will
Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.Identical attached drawing in figure
Label indicates same or similar structure, thus the detailed description that will omit them.
This example embodiment provides bearing rotation and radial load combined test device under a kind of hot environment, should
Experimental rig may include support frame, installation axle 3, connection frame, outline border, radial force application mechanism 6, high-temperature cabinet 10 and rotation driving
Mechanism 8 etc.；Installation axle 3 is set on support frame as described above, for installing by test bearing 1；Connection frame is connected to described tested
The outer ring of bearing 1；Outline border is connected to the connection frame；Radial force application mechanism 6 is set between the outline border and connection frame, for giving
It is described that radial load is applied by test bearing 1；High-temperature cabinet 10 is set to except the connection frame；Rotary drive mechanism 8 is fixed on institute
It states on support frame, is relatively rotated between the inner ring and outer ring by test bearing 1 for driving.
In this example embodiment, support frame may include bottom plate 21, and bottom plate 21 is mounted on ground or testing stand, bottom
It can be symmetrical on plate 21 and be vertically arranged there are two support plate 22, offers through-hole in two support plates 22, installation axle 3 passes through
Two through-holes simultaneously protrude from two support plates 22, and are fixed in support plate 22.Installation is by test bearing 1, tool in installation axle 3
It is taper fit by the inner ring of test bearing 1 and installation axle 3, and pass through lock in the lesser side of the diameter of installation axle 3 for body
Tight nut will be fixed on the medium position of installation axle 3 by the inner ring of test bearing 1.In the position of the protrusion support plate 22 of installation axle 3
It installs and is equipped with card slot, c-type circlip is arranged in card slot, axis 3 is fixedly mounted by two c-type circlips, installation axle 3 is avoided to try
Axial float occurs during testing.Installation axle 3 is fixed so that bearing inner race is also fixed rotatably.The height of installation axle 3 is higher
Installation connection frame and outline border etc. enough.
Mounting plate 23 is additionally provided on bottom plate 21, mounting plate 23 may be to be vertically arranged, and can pacify on mounting plate 23
Fill rotary drive mechanism 8.Support frame can be processed using 30CrMnSiA, be heat-treated after machining, be allowed to meet mechanical strong
The requirement such as degree, rigidity, hardness.Installation axle 3 is processed by heat-resisting material silicon carbide, meets intensity under hot environment, and rigidity is wanted
It asks.
Certainly, in other example embodiments of the invention, installation axle 3 can be mounted in through-hole by bearing, be made
Installation axle 3 can be rotated, and installation axle 3 can be followed to rotate by the inner ring of test bearing 1, not rotated by the outer ring of test bearing 1, real
The relative rotation of existing inner ring and outer ring.
In this example embodiment, connection frame may include the first connecting plate 41, the second connecting plate 42, third connecting plate
43, the 4th connecting plate and mounting base 44 etc..Mounting base 44 is installed outside by the outer ring of test bearing 1.Mounting base 44 is set
It is set to rectangular, is provided with via hole, is fixedly installed in via hole by the outer ring of test bearing 1.It is provided with outside mounting base 44
The first connecting plate 41, the second connecting plate 42, third connecting plate 43 and the 4th connecting plate being sequentially connected end to end, i.e., the first connection
Plate 41, the second connecting plate 42, third connecting plate 43 and the 4th connecting plate form a square frame-like.It connects frame and uses high temperature resistant
Material silicon carbide processing, meets intensity under hot environment, the requirement of rigidity.
In this example embodiment, outline border may include the first crossbeam 51 being sequentially connected end to end, the first vertical beam 52,
Two crossbeams 53 and the second vertical beam 54 etc..First crossbeam 51 is identical with the structure of second cross beam 53, the first vertical beam 52 and
The structure of two vertical beams 54 is identical, and the length of first crossbeam 51 makes outline border form a rectangle less than the length of the first vertical beam 52
Frame-shaped.First crossbeam 51, the first vertical beam 52, second cross beam 53 and the second vertical beam 54 can using double I-steel cuttings and
At, naturally it is also possible to use I-steel, rectangular steel tube etc..Outline border is processed using 30CrMnSiA, is heat-treated after machining,
It is allowed to meet the requirement such as mechanical strength, rigidity, hardness.
In this example embodiment, mentioned upper and lower, left and right are subject to be marked in Fig. 1.
In this example embodiment, being located above is first crossbeam 51, according to being followed successively by the second company clockwise
Fishplate bar 42, third connecting plate 43 and the 4th connecting plate；Being located above is the first connecting plate 41, according to clockwise successively
For the first vertical beam 52, second cross beam 53 and the second vertical beam 54.
In this example embodiment, radial force application mechanism 6 can be fixed on first crossbeam 51, and radial force application mechanism 6
Drive shaft can stretch in the vertical direction.First connector is set as one, and there are three the settings of the second connector.Specifically
Are as follows: the first connector is connected between the first connecting plate 41 and radial force application mechanism 6.In the second connecting plate 42 and the first vertical beam
It is connected with the second connector between 52, is also connected with the second connector between third connecting plate 43 and second cross beam 53,
The second connector is also connected between four connecting plates and the second vertical beam 54.
In this example embodiment, the first connector may include the first fixed plate 71 and first connecting rod 72 etc.
Deng.First fixed plate 71 is bolted to connection with the first connecting plate 41；First connecting rod 72 is vertical at the first fixed plate
On 71, the one end of first connecting rod 72 connecting with radial force application mechanism 6 is provided with the first hinge hole, radial force application mechanism 6
The second hinge hole is provided in drive shaft, hinge bar passes through the first hinge hole and the second hinge hole for first connecting rod 72 and radial direction
The drive shaft of force application mechanism 6 it is hinged, making can phase between first connecting rod 72 and the drive shaft of radial force application mechanism 6
To rotation.
In this example embodiment, the second connector may include the second fixed plate 91 and the second connecting rod 92 etc.
Deng.Second fixed plate 91 is bolted to connection with frame is connect；Second connecting rod 92 is vertical in the second fixed plate 91, the
The one end of two connecting rods 92 connecting with outline border is provided with external screw thread.
In this example embodiment, it is provided with the first strip-shaped hole on the first vertical beam 52, the second connecting rod 92 passes through the
One strip-shaped hole simultaneously protrudes from the first vertical beam 52, has fixed spiral shell in the one end fits for protruding from the first vertical beam 52 of the second connecting rod 92
Mother 11, i.e. fixture nut 11 is threadedly engaged in the external screw thread of the second connecting rod 92, and is located at the outside of the first vertical beam 52.
The second strip-shaped hole is provided on the second vertical beam 54, the second connecting rod 92 passes through the second strip-shaped hole and protrudes from second
Vertical beam 54 has fixture nut 11, i.e. 11 spiral shell of fixture nut in the one end fits for protruding from the second vertical beam 54 of the second connecting rod 92
Line is matched with the external screw thread of the second connecting rod 92, and is located at the outside of the second vertical beam 54.
When radial force application mechanism 6 is given and applies load radially downward by test bearing 1, had by test bearing 1
Downward micromotion, the second connector for being connected to two sides also have downward micromotion, perpendicular in the first vertical beam 52 and second
Strip-shaped hole is set on beam 54, the micromotion of the second connector can be discharged, avoids the second connector from generating Light deformation, avoids influencing
Experiment effect.
In this example embodiment, location hole is provided on second cross beam 53, the second connecting rod 92 is inserted into location hole,
The size for being sized slightly larger than the second connecting rod 92 of location hole allows the second play above and below positioning hole of connecting rod 92.
Second connecting rod 92 insertion location hole can position the second connector in peripheral direction, in the machine that radially exerts a force
When structure 6 is to load radially downward is applied by test bearing 1, downward micromotion is had by test bearing 1, is located at subject
The second connector for testing 1 lower section of bearing also has downward micromotion, and the second connecting rod 92 insertion location hole can discharge second
The micromotion of connector guarantees that radial load is applied to by test bearing 1.
In this example embodiment, high-temperature cabinet 10 use split installing type high-temperature cabinet 10, high-temperature cabinet 10 it is upper and lower,
The side of front, rear, left and right six is provided with through-hole, for 72, three the second connecting rods 92 of first connecting rod and installation axle 3
Both ends pass through.The test temperature of high-temperature cabinet 10 can achieve about 1500 DEG C.It connects frame and is arranged by test bearing 1 in height
In incubator 10, high-temperature cabinet 10 can test bearing 1 for subject and provide the test temperature of needs.
In this example embodiment, the drive shaft and outline border of rotary drive mechanism 8 are hinged, for driving outline border, connection
It frame, high-temperature cabinet 10, radial force application mechanism 6 and is rotated jointly by the outer ring of test bearing 1.The drive shaft of rotary drive mechanism 8
It is vertically arranged with installation axle 3, and the drive shaft of rotary drive mechanism 8 and installation axle 3 are not in the same plane, in rotary driving machine
Structure 8 pushes or pull under effect, outline border, connection frame, high-temperature cabinet 10, radial force application mechanism 6 and by the outer ring of test bearing 1
It is jointly the rotation of center axis with installation axle 3.
In this example embodiment, rotary drive mechanism 8 and radial force application mechanism 6 are electric cylinders, linear motor, oil
One of cylinder, cylinder are a variety of.
In addition, the drive shaft of rotary drive mechanism 8 can be with installation axle 3 in other example embodiments of the invention
It is fixedly connected, installation axle 3 is driven by rotary drive mechanism 8 and is rotated jointly by the inner ring of test bearing 1, realization is tested
It is relatively rotated between the inner ring and outer ring of bearing 1.At this time, it may be necessary to which installation axle 3 is rotatably installed on the support frame.Rotation driving
Mechanism 8 can be rotating electric machine.
In this example embodiment, temperature sensor can be provided in high-temperature cabinet 10, temperature sensor can be real
When measurement high-temperature cabinet 10 in real time temperature.Pressure sensing can be set between the first connecting plate 41 and the first fixed plate 71
Device, can be with 6 pairs of real-time radial loads applied by test bearing 1 of real-time measurement radial direction force application mechanism by pressure sensor.It can
Displacement detector is arranged on rotary drive mechanism 8, the length that rotary drive mechanism 8 stretches out is detected by displacement detector.
The experimental rig can also include control unit, and control unit can be industrial personal computer, microprocessor, single-chip microcontroller etc..Temperature passes
Sensor, pressure sensor, displacement detector are all connected to the input terminal of control unit.
Set temperature is stored in control unit, control unit can compare set temperature and real time temperature, in setting temperature
When degree and real time temperature have difference, carrying out control to high-temperature cabinet 10 makes high-temperature cabinet 10 heat or stop heating.Control unit memory
Contain setting radial load, control unit can compare setting radial load and real-time radial load, in setting radial load and
When real-time radial load has difference, the amount that control changes application load is carried out to radial force application mechanism 6.And it is in radial load
In the case where varying load, closed loop also may be implemented and accurately control.Control unit receives the length value of displacement detector detection, can be with
It is calculated according to length value by the rotation angle of test bearing 1, and controls the stroke of rotary drive mechanism 8, to control subject
Test the rotation angle of bearing 1.Moreover, radial load data when test is rotated by test bearing 1, can calculate by test bearing
1 rotating torque；Rotary drive mechanism 8 can be loaded with radial 6 joint coordination of force application mechanism during test.
Above-mentioned described feature, structure or characteristic can be incorporated in one or more embodiment party in any suitable manner
In formula, if possible, it is characterized in discussed in each embodiment interchangeable.In the above description, it provides many specific thin
Section fully understands embodiments of the present invention to provide.It will be appreciated, however, by one skilled in the art that this can be practiced
The technical solution of invention, or can be using other methods, component, material without one or more in the specific detail
Material etc..In other cases, known features, material or operation are not shown in detail or describe to avoid each side of the invention is obscured
Face.
The term of " about " " about " is used to be generally represented within the 20% of a given value or range in this specification, preferably
It is within 10%, and is more preferably within 5%.Given quantity is quantity about herein, implies that the feelings in not certain illustrated
Under condition, " about " " about " " substantially " meaning of " general " can be still implied.
Although the term of relativity, such as "upper" "lower" is used to describe a component of icon for another in this specification
The relativeness of one component, but these terms are in this manual merely for convenient, for example, with reference to the accompanying drawings described in show
The direction of example.It is appreciated that, if making it turn upside down the device overturning of icon, the component described in "upper" will
As the component in "lower".Term of other relativities, such as "high" " low " "top" "bottom" " preceding " " rear " " left side " " right side " etc. are also made
With similar meaning.When certain structure is at other structures "upper", it is possible to refer to that certain structural integrity is formed in other structures, or
Refer to that certain structure is " direct " to be arranged in other structures, or refers to that certain structure is arranged in other structures by the way that another structure is " indirect ".
In this specification, term "one", " one ", "the", " described " and "at least one" indicating there are one or
Multiple element/component parts/etc.；Term "comprising", " comprising " and " having " are to indicate the open meaning being included
And refer to the element in addition to listing/component part/also may be present other than waiting other element/component part/etc.；Term " the
One ", " second " and " third " etc. only use as label, are not the quantity limitations to its object.
It should be appreciated that the present invention is not limited in its application to the detailed construction and arrangement of the component of this specification proposition
Mode.The present invention can have other embodiments, and can realize and execute in many ways.Aforesaid deformation form and
Modification is fallen within the scope of the present invention.It should be appreciated that this disclosure and the present invention of restriction extend in text
And/or it is mentioned in attached drawing or all alternative combinations of two or more apparent independent features.It is all these different
Combination constitutes multiple alternative aspects of the invention.Embodiment described in this specification illustrates to become known for realizing the present invention
Best mode, and will enable those skilled in the art using the present invention.
Claims (10)
1. bearing rotation and radial load combined test device under a kind of hot environment characterized by comprising
Support frame；
Installation axle is set on support frame as described above, for installing by test bearing；
Frame is connected, the outer ring by test bearing is connected to；
Outline border is connected to the connection frame；
Radial force application mechanism is set between the outline border and connection frame, for applying radial load by test bearing to described；
High-temperature cabinet is set to except the connection frame；
Rotary drive mechanism is fixed on support frame as described above, for driving phase between the inner ring by test bearing and outer ring
To rotation.
2. the bearing rotation and radial load combined test device, feature under hot environment according to claim 1 exist
In the drive shaft of the rotary drive mechanism and the outline border are hinged, for driving the outline border, the connection frame, the height
It incubator, the radial force application mechanism and described is rotated jointly by the outer ring of test bearing.
3. the bearing rotation and radial load combined test device, feature under hot environment according to claim 2 exist
In the drive shaft is vertically arranged with the installation axle, and the drive shaft and the installation axle are not in the same plane.
4. the bearing rotation and radial load combined test device, feature under hot environment according to claim 1 exist
In the connection frame includes:
The first connecting plate, the second connecting plate, third connecting plate and the 4th connecting plate being sequentially connected end to end；And
Mounting base is connected to first connecting plate, second connecting plate, the third connecting plate and the 4th connection
Plate, the interior installation outer ring by test bearing of the mounting base.
5. the bearing rotation and radial load combined test device, feature under hot environment according to claim 4 exist
In the outline border includes the first crossbeam being sequentially connected end to end, the first vertical beam, second cross beam and the second vertical beam.
6. the bearing rotation and radial load combined test device, feature under hot environment according to claim 5 exist
In the radial direction force application mechanism is fixed on the first crossbeam, the combined test device further include:
First connector is connected between first connecting plate and the radial force application mechanism；
Three the second connectors are correspondingly connected to second connecting plate and first vertical beam, third connecting plate and described the
Between two crossbeams and the 4th connecting plate and second vertical beam.
7. the bearing rotation and radial load combined test device, feature under hot environment according to claim 6 exist
In first connector includes:
First fixed plate is connect with first connecting plate；
First connecting rod is vertical in first fixed plate and connect with the radial force application mechanism, first connection
The one end of bar connecting with the radial force application mechanism is provided with the first hinge hole.
8. the bearing rotation and radial load combined test device, feature under hot environment according to claim 6 exist
In second connector includes:
Second fixed plate is connected with the connection frame；
Second connecting rod is vertical at second fixed plate and connect with the outline border, second connecting rod with it is described
One end of outline border connection is provided with external screw thread.
9. the bearing rotation and radial load combined test device, feature under hot environment according to claim 8 exist
In being provided with the first strip-shaped hole on first vertical beam, second connecting rod passes through first strip-shaped hole and protrudes from institute
State the first vertical beam；The second strip-shaped hole is provided on second vertical beam, second connecting rod penetrates through second strip-shaped hole
And protrude from second vertical beam；Second connector further include:
Fixture nut is threadedly engaged in the external screw thread of second connecting rod.
10. the bearing rotation and radial load combined test device, feature under hot environment according to claim 8 exist
In being provided with location hole on the second cross beam, second connecting rod is inserted into the location hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811196184.8A CN109357869A (en) | 2018-10-15 | 2018-10-15 | Bearing rotation and radial load combined test device under hot environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811196184.8A CN109357869A (en) | 2018-10-15 | 2018-10-15 | Bearing rotation and radial load combined test device under hot environment |
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