CN108267315A - Rack pinion loads the rolling bearing fatigue life test device of alternating load - Google Patents
Rack pinion loads the rolling bearing fatigue life test device of alternating load Download PDFInfo
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- CN108267315A CN108267315A CN201711456446.5A CN201711456446A CN108267315A CN 108267315 A CN108267315 A CN 108267315A CN 201711456446 A CN201711456446 A CN 201711456446A CN 108267315 A CN108267315 A CN 108267315A
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- rolling bearing
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- alternating load
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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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Abstract
The present invention relates to a kind of rolling bearing fatigue life test devices of rack pinion loading alternating load, the device controls the rotation of driving motor by computer, rolling bearing is driven with given rotation speed operation, in rack pinion alternating load loading unit, the rotary motion of electric rotating machine is converted to by linear motion by rack and pinion drive mechanism, it can influence the stretching/compressing amount of spring, due to the change of the stretching/compressing amount of spring, spring can apply of different sizes on floating holder surface, the active force of direction-agile, the loading of bearing alternating load can be realized by adding multiple rack pinion alternating load loading units in floating holder different zones, torquemeter and temperature sensor are used for detecting the performance in rolling bearing operation process.Compared with prior art, the present invention can accurately realize the loading of rolling bearing alternating load, with reference to the real working condition condition of internal combustion engine, carry out rolling bearing fatigue life test.
Description
Technical field
The invention belongs to engine rolling bearing life testing fields, are related to a kind of rack pinion loading alternating load
Rolling bearing fatigue life test device.
Background technology
Internal combustion engine is widely used in automobile, ship, aircraft, tank, railway locomotive, agricultural machinery, engineering machinery, power generation
Multiple industries such as unit, play a very important role as power-equipment in national economy.Include work in internal combustion engine
Plug-cylinder sleeve, piston ring-cylinder liner, bent axle-bearing and cam-tappet etc. are several to important friction pair, wherein, crankshaft bearing, including
Base bearing and the connecting-rod bearing (since the size and Orientation of such bearing working load all changes over time, are thus generically referred to as moving
Load bearings), it is one of the most key friction pair of internal combustion engine, it not only influences the reliability of internal combustion engine and tired longevity
Life, also affects the potentiality that internal combustion engine is further strengthened.
At present, car engine main bearing, camshaft bearing and connecting rod bottom-end bearing are few mainly using sliding bearing
The camshaft bearing of number engine employs rolling bearing.According to tribology theory, rolling friction is damaged than the energy of sliding friction
Small an order of magnitude or so is wanted in mistake.Therefore, under identical working condition, the friction loss of rolling bearing is much smaller than sliding axle
It holds, thus the important trial that bearing element chemical conversion lowers consumption for engine antifriction.
The fatigue life of rolling bearing and its reliability are the most important performance indicators of rolling bearing, but tired due to influencing
Labor factors of limit life is too many and bearing fatigue life theory still needs to perfect, and it is currently the only effective way to carry out life test.Axis
It is essential and basic important verification process in design bearing and manufacturing process to hold experiment.The loading load of test bearing is as axis
The important parameter of testing machine test is held, accuracy directly affects the result of the test of bearing.Rolling bearing experiment traditional at present
Device loading characteristic is single, it is impossible to realize the loading of changeable load, and dynamic load rolling bearing is often in alternation in true internal combustion engine
Load, therefore traditional rolling bearing experimental rig is difficult the experiment for carrying out engine dynamic load rolling bearing fatigue life.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of rack pinions
Load the rolling bearing fatigue life test device of alternating load.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of rolling bearing fatigue life test device of rack pinion loading alternating load, for measuring the axis of rolling
It holds the fatigue life under alternate load effect, the rolling bearing is distributed in interior by outer ring, inner ring and by retainer
Multiple rolling elements composition between circle and outer ring, the device include,
Workbench,
Driving motor is connected on workbench,
Rotary shaft is sequentially connected with driving motor, and the rotary shaft is equipped with torquemeter,
Two stationary fixtures, are connected on workbench, and one is clamped in each stationary fixture and accompanies examination rolling bearing,
Floating holder between two stationary fixtures, divides fixture to form by two opposed activities, the activity folder
It is clamped at least one subject rolling bearing in tool, the subject rolling bearing and accompanies examination rolling bearing coaxial arrangement, and
It is arranged on the rotary shaft,
Temperature sensor is arranged in floating holder, and is contacted with subject rolling bearing,
Rack pinion alternating load loading unit, the charging assembly for being respectively acting on each activity by two and being divided on fixture
Composition, each charging assembly is by the electric rotating machine, rack and pinion drive mechanism, load loading spring and the connector that are sequentially connected successively
Composition, the connector divides fixture to connect with activity, and the load loading springs of two charging assemblies is in line-styled to installing
Put, the telescopic direction of each load loading spring on direction radially of the axis of rotation, the rack and pinion drive mechanism by
Worm screw, gear and rack composition, the rack being sequentially connected successively exist with the rack sliding seat being arranged on workbench
It is slidably connected on rack length direction and rack length direction is consistent with load loading spring telescopic direction, one end of rack leads to
It crosses rack connecting plate to connect with load loading spring, the worm screw is sequentially connected with electric rotating machine.
Preferably, the worm screw forms self locking type worm gear-worm structure with gear.
Preferably, the axis of the worm screw is parallel with the length direction of rack, and worm screw and rack separation gear two
Side.
Preferably, two subject rolling bearings are clamped in the floating holder.
Preferably, the floating holder divides fixture and lower activity that fixture is divided to form by upper activity opposed up and down, described
Upper activity divide fixture bottom be equipped with upper arc groove, the lower activity divide fixture top be equipped with lower arcuate slot, upper arc
Slot and lower arcuate slot match the clamping part for being combined into and matching with rolling bearing, and rack pinion alternating load loading is single
Member is made of upper charging assembly and lower charging assembly, and the upper charging assembly is arranged on top and the effect that activity divides fixture
Divide the top of fixture in upper activity, the lower charging assembly is arranged on lower activity and divides the lower section of fixture and act on lower activity point
The bottom of fixture.
Preferably, the temperature sensor is arranged in arc groove or lower arcuate slot, and with the outer ring of rolling bearing
Contact.
Preferably, the rotary shaft is sequentially connected by shaft coupling and driving motor.
Preferably, which further includes to communicate with driving motor, temperature sensor, torquemeter and electric rotating machine respectively and connect
The controller connect.
Preferably, which further includes for for examination rolling bearing and subject rolling bearing is accompanied to provide the confession oil machine of lubricating oil
Structure, the oil supply mechanism are connect with controller communication.
The present invention operation principle be：
Computer controls the rotation of driving motor, drives rolling bearing with given rotation speed operation.In rack pinion
In alternating load loading unit, the rotation of electric rotating machine is controlled by computer, will be revolved by rack and pinion drive mechanism
The rotary motion of rotating motor is converted to linear motion, can influence the stretching/compressing amount of spring.Due to the stretching/compressing of spring
The change of amount, spring will can apply of different sizes, direction-agile active force on floating holder surface.By in floating holder
Different zones, which add multiple rack pinion alternating load loading units, can realize the loading of bearing alternating load.Computer
The oil mass in rolling bearing operation process is controlled to supply by oil supply mechanism, torquemeter and temperature sensor can be used for detecting rolling
Performance in dynamic bearing operation process.
Compared with prior art, the invention has the advantages that：
(1) rotation angle of electric rotating machine is controlled by computer, and then changes compression/amount of tension of spring, controls bullet
The elastic force of spring can realize loading of the rolling bearing in the alternating load of two relative directions (such as upper and lower directions).
(2) with reference to the real working condition condition of internal combustion engine, rotation angle and the time of electric rotating machine are controlled by computer
Variable quantity can realize the loading of internal combustion engine real working condition load.Contribute to carry out the rolling of engine dynamic load using the test device
Dynamic bearing fatigue life test.
(3) transmission efficiency of rack-and-pinion transport mechanism, load loading is accurate, is conducive to improve the accurate of load loading
Property.
(4) worm screw creatively between electric rotating machine and gear is set, plays the role of deceleration torque, alleviates rotation
The burden of motor can select low power electric rotating machine.
(5) when worm screw and gear form self locking type worm gear-worm structure, the reaction force of load loading spring is avoided
Influence to load loading further improves the accuracy of load loading.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the schematic diagram of the rack pinion alternating load loading unit of the present invention.
In figure, 1 is computer, and 2 be driving motor, and 3 be shaft coupling, and 4 be torquemeter, and 5 be stationary fixture A, and 6 be for oil machine
Structure, 7 be rack pinion alternating load loading unit, and 8 be floating holder, and 81 divide fixture for upper activity, and 82 be lower activity point
Fixture, 9 be stationary fixture B, and 10 be rotary shaft, and 11 is accompany examination rolling bearing B, and 12 roll for subject rolling bearing B, 13 for subject
Bearing A, 14 is accompany examination rolling bearing A, and 15 be workbench, and 16 be temperature sensor, and 17 be electric rotating machine A, and 181 be worm screw A,
182 be gear A, and 183 be rack A, and 184 be rack sliding seat A, and 185 be rack connecting plate A, and 19 be load loading spring A, 20
For connector A, 21 be connector B, and 22 be load loading spring B, and 231 be worm screw B, and 232 be gear B, and 233 be rack B, 234
It is rack connecting plate B for rack sliding seat B, 235,24 be electric rotating machine B.
Specific embodiment
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment 1
A kind of rolling bearing fatigue life test device of rack pinion loading alternating load, as shown in Fig. 1~2,
For measuring fatigue life of the rolling bearing under alternate load effect, rolling bearing is by outer ring, inner ring and passes through retainer
The multiple rolling elements composition being distributed between inner ring and outer ring, the device include,
Workbench 15,
Driving motor 2 is connected on workbench 15,
Rotary shaft 10 is sequentially connected with driving motor 2, is sequentially connected preferably by shaft coupling 3 and driving motor 2, rotation
Axis 10 is equipped with torquemeter 4,
Two stationary fixtures --- stationary fixture A5 and stationary fixture B9, is connected on workbench 15, stationary fixture A5
Inside be clamped with and accompany examination rolling bearing A14, be clamped in stationary fixture B9 and accompany examination rolling bearing B11, accompany examination rolling bearing A 14 with
Examination rolling bearing B 11 is accompanied to play the role of supporting rotary shaft 10.
Floating holder 8 does not contact between stationary fixture A5 and stationary fixture B9, and with the two, by opposed upper
Activity divides fixture A81 and lower activity that fixture B82 is divided to form, and at least one subject rolling bearing, this reality are clamped in floating holder 8
Applying clamping in example, there are two subject rolling bearings, are respectively tested rolling bearing A13 and subject rolling bearing B12, each subject rolling
Dynamic bearing and examination rolling bearing coaxial arrangement is accompanied, and is set in rotary shaft 10,
Temperature sensor 16 is arranged in floating holder 8, and is contacted with each subject rolling bearing,
Rack pinion alternating load loading unit 7, the loading group for being respectively acting on each activity by two and being divided on fixture
Part forms, and each charging assembly is by the electric rotating machine, rack and pinion drive mechanism, load loading spring and the connection that are sequentially connected successively
Device forms, and connector divides fixture to connect with activity, and the load loading spring of two charging assemblies is opposite disposed in line-styled, often
The telescopic direction of a load loading spring is on direction radially of the axis of rotation, and rack and pinion drive mechanism by being sequentially connected successively
Worm screw, gear and rack composition, rack and the rack sliding seat that is arranged on workbench 15 are sliding on rack length direction
It moves connection and rack length direction is consistent with load loading spring telescopic direction, one end of rack passes through rack connecting plate with carrying
Lotus loading spring connects, and worm screw is sequentially connected with electric rotating machine.
In the present embodiment, floating holder divides fixture and lower activity that fixture is divided to form by upper activity opposed up and down, upper activity
The bottom of fixture is divided to be equipped with upper arc groove, lower activity divides the top of fixture to be equipped with lower arcuate slot, and upper arc groove and lower arcuate slot are matched
Be combined into the clamping part to match with rolling bearing, temperature sensor 16 is arranged in arc groove or lower arcuate slot, and with rolling
The outer ring contact of dynamic bearing.Rack pinion alternating load loading unit 7 is made of upper charging assembly and lower charging assembly, on
Charging assembly is arranged on activity and divides the top of fixture 81 and act on the top that activity divides fixture 81, by being sequentially connected successively
Electric rotating machine A17, rack and pinion drive mechanism A, load loading spring A19 and connector A20 composition, rack pinion machine
Structure A is made of worm screw A181, gear A 182 and the rack A183 being sequentially connected successively, and rack A183 is with being arranged on workbench 15
On rack sliding seat A184 be slidably connected on rack A183 length directions, the bottom end of rack A183 passes through rack connecting plate
A185 is connect with load loading spring A19, and worm screw A181 and electric rotating machine A17 is sequentially connected.Lower charging assembly is arranged on lower work
It is dynamic to divide the lower section of fixture 82 and act on the bottom that lower activity divides fixture 82, by electric rotating machine B24, the gear being sequentially connected successively
Rack gear B, load loading spring B22 and connector B21 compositions, rack and pinion drive mechanism B by being sequentially connected successively
Worm screw B231, gear B 232 and rack B233 compositions, rack B233 and the rack sliding seat being arranged on workbench 15
B234 is slidably connected on rack B233 length directions, and the top of rack B233 loads bullet by rack connecting plate B235 and load
Spring B22 connections, worm screw B231 and electric rotating machine B24 are sequentially connected.Worm screw in the present embodiment forms self locking type worm gear with gear
Worm structure.The axis of worm screw is parallel with the length direction of rack, and worm screw and rack separation gear both sides.
Convert rotational motion is linear motion by rack and pinion drive mechanism A by electric rotating machine A 17, and control load adds
It carrying spring A19 and stretching/compressing deformation occurs, load loading spring A19 is connected by connecting connector A 20 with floating holder 8,
Apply loading force；Similar, convert rotational motion is linear motion by rack and pinion drive mechanism B by electric rotating machine B24, is controlled
Stretching/compressing deformation occurs for load loading spring B22 processed, and load loading spring B22 passes through connector B21 and 8 phase of floating holder
Even, apply loading force.
The device, which further includes to communicate with driving motor 2, temperature sensor 16, torquemeter 4 and each electric rotating machine respectively, to be connected
Computer 1 may be used in the controller connect, controller, and temperature sensor 16 and torquemeter 4 can acquire rolling bearing and operate
Signal in journey monitors the operational situation of rolling bearing, which, which also includes, is used for as examination rolling bearing and subject is respectively accompanied to roll
Bearing provides the oil supply mechanism 6 of lubricating oil, and oil supply mechanism 6 is connect with controller communication, realizes the fuel feeding to rolling bearing.
Computer controls the rotation of driving motor, drives rolling bearing with given rotation speed operation.In rack pinion
In alternating load loading unit, the rotation of electric rotating machine is controlled by computer, will be revolved by rack and pinion drive mechanism
The rotary motion of rotating motor is converted to linear motion, can influence the stretching/compressing amount of spring.Due to the stretching/compressing of spring
The change of amount, spring will can apply of different sizes, direction-agile active force on floating holder surface.By in floating holder
Different zones, which add multiple rack pinion alternating load loading units, can realize the loading of bearing alternating load.Computer
The oil mass in rolling bearing operation process is controlled to supply by oil supply mechanism, torquemeter and temperature sensor can be used for detecting rolling
Performance in dynamic bearing operation process.
The above-mentioned description to embodiment is for ease of ordinary skill in the art to understand and use the invention.It is ripe
The personnel for knowing art technology obviously can easily make these embodiments various modifications, and general original described herein
It ought to use in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to above-described embodiment, this fields
Technical staff's announcement according to the present invention, improvement and modification made without departing from the scope of the present invention all should be in the guarantors of the present invention
Within the scope of shield.
Claims (9)
1. a kind of rolling bearing fatigue life test device of rack pinion loading alternating load, for measuring rolling bearing
Fatigue life under alternate load effect, the rolling bearing are distributed in inner ring by outer ring, inner ring and by retainer
Multiple rolling elements composition between outer ring, which is characterized in that the device includes,
Workbench,
Driving motor is connected on workbench,
Rotary shaft is sequentially connected with driving motor, and the rotary shaft is equipped with torquemeter,
Two stationary fixtures, are connected on workbench, and one is clamped in each stationary fixture and accompanies examination rolling bearing, activity folder
Tool, between two stationary fixtures, divides fixture to form, is clamped at least in the floating holder by two opposed activities
One subject rolling bearing, the subject rolling bearing and accompanies examination rolling bearing coaxial arrangement, and is set in rotary shaft
On,
Temperature sensor is arranged in floating holder, and is contacted with subject rolling bearing,
Rack pinion alternating load loading unit, the charging assembly group for being respectively acting on each activity by two and being divided on fixture
Into, each charging assembly by the electric rotating machine, rack and pinion drive mechanism, load loading spring and the connector group that are sequentially connected successively
Into, the connector divides fixture to connect with activity, and the load loading spring of two charging assemblies is opposite disposed in line-styled,
The telescopic direction of each load loading spring is on direction radially of the axis of rotation, and the rack and pinion drive mechanism is by successively
The worm screw of drive connection, gear and rack composition, the rack and the rack sliding seat that is arranged on workbench are in rack
It is slidably connected on length direction and rack length direction is consistent with load loading spring telescopic direction, one end of rack passes through tooth
Connecting plate is connect with load loading spring, and the worm screw is sequentially connected with electric rotating machine.
2. the rolling bearing fatigue life test device of rack pinion loading alternating load according to claim 1,
It is characterized in that, the worm screw forms self locking type worm gear-worm structure with gear.
3. the rolling bearing fatigue life test dress of rack pinion loading alternating load according to claim 1 or 2
It puts, which is characterized in that the axis of the worm screw is parallel with the length direction of rack, and worm screw and rack separation gear two
Side.
4. the rolling bearing fatigue life test device of rack pinion loading alternating load according to claim 1,
It is characterized in that, two subject rolling bearings are clamped in the floating holder.
5. the rolling bearing fatigue life test device of rack pinion loading alternating load according to claim 1,
It is characterized in that, the floating holder divides fixture and lower activity that fixture is divided to form by upper activity opposed up and down, described is upper
Activity divide fixture bottom be equipped with upper arc groove, the lower activity divide fixture top be equipped with lower arcuate slot, upper arc groove and
Lower arcuate slot, which is matched, is combined into the clamping part that matches with rolling bearing, the rack pinion alternating load loading unit by
Upper charging assembly and lower charging assembly are formed, and the upper charging assembly is arranged on activity and divides the top of fixture and act on
Activity divides the top of fixture, and the lower charging assembly, which is arranged on lower activity and divides the lower section of fixture and act on lower activity, divides fixture
Bottom.
6. the rolling bearing fatigue life test device of rack pinion loading alternating load according to claim 5,
It is characterized in that, the temperature sensor is arranged in arc groove or lower arcuate slot, and contacted with the outer ring of rolling bearing.
7. the rolling bearing fatigue life test device of rack pinion loading alternating load according to claim 1,
It is characterized in that, the rotary shaft is sequentially connected by shaft coupling and driving motor.
8. the rolling bearing fatigue life test device of rack pinion loading alternating load according to claim 1,
It is characterized in that, the device further includes what is connected respectively with the communication of driving motor, temperature sensor, torquemeter and electric rotating machine
Controller.
9. the rolling bearing fatigue life test device of rack pinion loading alternating load according to claim 8,
It is characterized in that, the device is further included for providing the oil supply mechanism of lubricating oil to accompany examination rolling bearing and being tested rolling bearing,
The oil supply mechanism is connect with controller communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711456446.5A CN108267315A (en) | 2017-12-28 | 2017-12-28 | Rack pinion loads the rolling bearing fatigue life test device of alternating load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711456446.5A CN108267315A (en) | 2017-12-28 | 2017-12-28 | Rack pinion loads the rolling bearing fatigue life test device of alternating load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108267315A true CN108267315A (en) | 2018-07-10 |
Family
ID=62772559
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711456446.5A Withdrawn CN108267315A (en) | 2017-12-28 | 2017-12-28 | Rack pinion loads the rolling bearing fatigue life test device of alternating load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108267315A (en) |
-
2017
- 2017-12-28 CN CN201711456446.5A patent/CN108267315A/en not_active Withdrawn
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Application publication date: 20180710 |