CN108051210A - Lead screw transmission loads the rolling bearing fatigue life experimental rig of alternating load - Google Patents
Lead screw transmission loads the rolling bearing fatigue life experimental rig of alternating load Download PDFInfo
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- CN108051210A CN108051210A CN201711458330.5A CN201711458330A CN108051210A CN 108051210 A CN108051210 A CN 108051210A CN 201711458330 A CN201711458330 A CN 201711458330A CN 108051210 A CN108051210 A CN 108051210A
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- rolling bearing
- alternating load
- fatigue life
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- lead screw
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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 rolling bearing fatigue life experimental rigs of lead screw transmission loading alternating load, the device controls the rotation of driving motor by computer, rolling bearing is driven with given rotation speed operation, in lead screw transmission alternating load loading unit, the rotary motion of electric rotating machine is converted to by linear motion by lead-screw 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 lead screw transmission 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, with reference to the real working condition condition of internal combustion engine, can carry out rolling bearing fatigue life test with the simple and convenient accurate loading for realizing rolling bearing alternating load.
Description
Technical field
The invention belongs to engine rolling bearing lifes to test field, is related to a kind of rolling of lead screw transmission loading alternating load
Dynamic bearing fatigue life testing apparatus.
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 occupy very important status 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 bearing element chemical conversion is for an important trial of engine antifriction consumption reduction.
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.
The content of the invention
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of lead screw transmission loads
The rolling bearing fatigue life experimental rig of alternating load.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of rolling bearing fatigue life experimental rig of lead screw transmission loading alternating load, exists for measuring rolling bearing
Fatigue life under one-dimensional alternate load effect, the rolling bearing are 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,
Rotation axis is sequentially connected with driving motor, and the rotation axis is equipped with torquemeter,
Stationary fixture A and stationary fixture B, is connected on workbench, one is clamped in each stationary fixture, examination is accompanied to roll
Bearing,
Floating holder between stationary fixture A and stationary fixture B, divides fixture and lower activity point by opposed upper activity
Fixture forms, and is clamped at least one subject rolling bearing in the floating holder, the subject rolling bearing and accompanies examination
Rolling bearing is coaxially disposed, and is arranged on the rotary shaft,
Temperature sensor is arranged in floating holder, and is contacted with subject rolling bearing,
Lead screw transmission alternating load loading unit is respectively acting on each activity by two and divides charging assembly group on fixture
Into, each charging assembly is made of electric rotating machine, lead-screw drive mechanism, load loading spring and the connector being sequentially connected successively,
The connector is connected with floating holder, and the load loading spring of two charging assemblies is opposite disposed in line-styled, each
The telescopic direction of load loading spring is on direction radially of the axis of rotation, and the lead-screw drive mechanism is by worm screw, ball spiral shell
Female and leading screw composition, the leading screw are threaded through in ball nut, and the worm screw is with ball nut by being arranged on ball spiral shell
The screw thread engagement connection of female lateral surface, the worm screw and ball nut are fixed on by fixed frame on workbench, described
The axis direction of leading screw is consistent with the telescopic direction of load loading spring, and one end of leading screw is loaded by leading screw connecting plate and load
Spring connects, and the worm screw is sequentially connected with electric rotating machine.
Preferably, the worm screw and the screw thread of ball nut lateral surface form self locking type worm gear-worm structure.
Preferably, each charging assembly is set there are two electric rotating machine, and the both ends with worm screw are connected by driven by clutches respectively
It connects.
Preferably, the junction of the leading screw connecting plate and leading screw is equipped with swivel bearing, and one end of the leading screw leads to
The swivel bearing is crossed to be rotatablely connected with leading screw connecting plate.
Preferably, two subject rolling bearings are clamped in the floating holder.
Preferably, the upper activity divides the bottom of fixture to be equipped with upper arc groove, and the lower activity divides the top of fixture
Equipped with lower arcuate slot, upper arc groove and lower arcuate slot match somebody with somebody the clamping part for being combined into and matching with rolling bearing, and the leading screw passes
Dynamic alternating load loading unit is made of upper charging assembly and lower charging assembly, and the upper charging assembly is arranged on activity point
The top of fixture simultaneously acts on the top that activity divides fixture, and the lower charging assembly is arranged on the lower section that lower activity divides fixture
And act on the bottom that lower activity divides 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 rotation axis 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 to provide the confession oil machine of lubricating oil to accompany examination rolling bearing and being tested rolling bearing
Structure, the oil supply mechanism are connected with controller communication.
The present invention operation principle be：
Computer (controller) controls the rotation of driving motor, drives rolling bearing with given rotation speed operation.In leading screw
It is driven in alternating load loading unit, the rotation of electric rotating machine is controlled by computer, will be revolved by lead-screw 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 lead screw transmission alternating load loading units, can realize the loading of bearing alternating load.Computer passes through
Oil mass supply in oil supply mechanism control rolling bearing operation process, torquemeter and temperature sensor can be used for detecting the axis of rolling
Hold the performance in operation process.
Compared with prior art, the invention has the advantages that：
(1) rotation angle of electric rotating machine is controlled by computer (controller), and then changes compression/stretching of spring
Amount controls the elastic force of spring, can realize rolling bearing in the alternating load of two relative directions (such as vertical direction) plus
It carries.
(2) the real working condition condition of internal combustion engine is combined, 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) lead screw transmission accuracy is high, improves the accuracy of load loading.
(4) deceleration torque is played the role of in the use of worm screw, alleviates the burden of electric rotating machine, can select small-power
Electric rotating machine.
(5) when worm screw and rolling bearing form self locking type worm gear-worm structure, the anti-work of load loading spring is avoided
Firmly to the influence of load loading, the accuracy that load loads is further improved.
(6) electric rotating machine is connected by clutch respectively at the both ends of leading screw, for the rotation of different directions, realizes alternation
The loading of load.
Description of the drawings
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structure diagram of the lead screw transmission alternating load loading unit of the present invention；
Fig. 3 is the schematic diagram of lead-screw drive mechanism；
Fig. 4 is the schematic top plan view of lead-screw drive mechanism.
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 lead screw transmission alternating load loading unit, and 71 be worm screw, and 72 be ball nut, and 73 be leading screw, and 74 be swivel bearing, 75
It is fixed frame for leading screw connecting plate, 76,8 be floating holder, and 81 divide fixture for upper activity, and 82 divide fixture for lower activity, and 9 be fixation
Fixture B, 10 be rotation axis, and 11 try rolling bearing B to accompany, and 12 be subject rolling bearing B, and 13 be subject rolling bearing A, and 14 be to accompany
Rolling bearing A is tried, 15 be workbench, and 16 be temperature sensor, and 17 be electric rotating machine, and 18 be load loading spring, and 19 be company
Connect device.
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 experimental rig of lead screw transmission loading alternating load, as shown in Figures 1 to 3, is used for
Fatigue life of the rolling bearing under one-dimensional alternate load effect is measured, 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,
Rotation axis 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,
Stationary fixture A5 and stationary fixture B9, is connected on workbench 15, is clamped in stationary fixture A5 and examination is accompanied to roll
It is clamped in bearing A14, stationary fixture B9 and accompanies examination rolling bearing B11, accompany examination rolling bearing A14 and examination rolling bearing B11 is accompanied to rise
To support rotation axis 10 effect,
Floating holder 8 between stationary fixture A5 and stationary fixture B9, divides fixture 81 He by upper activity opposed up and down
Lower activity divides fixture 82 to form, and is clamped at least one subject rolling bearing in floating holder 8, in the present embodiment there are two clampings
Rolling bearing is tested, is respectively tested rolling bearing A13 and subject rolling bearing B12, rolling bearing is tested and accompanies the examination axis of rolling
Coaxial arrangement is held, and is set in rotation axis 10,
Temperature sensor 16 is arranged in floating holder 8, and is contacted with subject rolling bearing,
Lead screw transmission alternating load loading unit 7 is respectively acting on each activity by two and divides charging assembly group on fixture
Into, each charging assembly by the electric rotating machine 17, lead-screw drive mechanism, load loading spring 18 and the connector 19 that are sequentially connected successively
Composition, connector 19 are connected with floating holder 8, and the load loading spring 19 of two charging assemblies is opposite disposed in line-styled,
In rotation axis 10 in the radial direction, lead-screw drive mechanism is by worm screw 71, rolling for the telescopic direction of each load loading spring 19
Pearl nut 72 and leading screw 73 form, and leading screw 73 is threaded through in ball nut 72, and worm screw 71 is with ball nut 72 by being arranged on rolling
The screw thread engagement connection of 72 lateral surface of pearl nut, worm screw 71 and ball nut 72 are fixed on workbench 15 by fixed frame 76
On, the axis direction of leading screw 73 is consistent with the telescopic direction of load loading spring 18, and one end of leading screw 73 passes through leading screw connecting plate
75 are connected with load loading spring 18, and worm screw 71 is sequentially connected with electric rotating machine 17.
In the present embodiment, each charging assembly is set there are two electric rotating machine 17, as shown in figure 4, two with worm screw 71 respectively
End is connected by driven by clutches.The screw thread of worm screw 71 and 72 lateral surface of ball nut forms self locking type worm gear-worm structure, and
And leading screw connecting plate 75 and the junction of leading screw 73 are equipped with swivel bearing 74, one end of leading screw 73 passes through the swivel bearing 74 and silk
Thick stick connecting plate 75 is rotatablely connected.
Upper activity in the present embodiment divides the bottom of fixture 81 to be equipped with upper arc groove, and lower activity divides the top of fixture 82 to be equipped with
Lower arcuate slot, upper arc groove and lower arcuate slot match somebody with somebody the clamping part for being combined into and matching with rolling bearing, and temperature sensor 16 is set
It is contacted in upper arc groove or lower arcuate slot, and with the outer ring of rolling bearing.Lead screw transmission alternating load loading unit 7 is added by upper
It carries component and lower charging assembly is formed, upper charging assembly is arranged on activity and divides the top of fixture 81 and act on activity point folder
The top of tool 81, lower charging assembly are arranged on lower activity and divide the lower section of fixture 82 and act on the bottom that lower activity divides fixture 82.
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 employed in the controller connect, controller, and temperature sensor 16 and torquemeter 4 can gather rolling bearing and operate
Signal in journey monitors the operational situation of rolling bearing, which, which also includes, is used to that examination rolling bearing and subject respectively to be accompanied to roll
Bearing provides the oil supply mechanism 6 of lubricating oil, and oil supply mechanism 6 is connected 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 lead screw transmission alternation
In load loading unit, the rotation of electric rotating machine is controlled by computer, by lead-screw drive mechanism by electric rotating machine
Rotary motion is converted to linear motion, can influence the stretching/compressing amount of spring.Due to the change of the stretching/compressing amount of spring,
Spring will can apply of different sizes, direction-agile active force on floating holder surface.By in floating holder different zones
The loading of bearing alternating load can be realized by adding multiple lead screw transmission alternating load loading units.Computer passes through oil supply mechanism
The oil mass supply in rolling bearing operation process is controlled, torquemeter and temperature sensor can operate for detecting rolling bearing
Performance in journey.
The above-mentioned description to embodiment is for ease of ordinary skill in the art to understand and use the invention.It is ripe
Knowing the personnel of 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 invention is not restricted 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 (10)
1. a kind of rolling bearing fatigue life experimental rig of lead screw transmission loading alternating load, for measuring rolling bearing one
The fatigue life under alternate load effect is tieed up, the rolling bearing is 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 (15),
Driving motor (2) is connected on workbench (15),
Rotation axis (10) is sequentially connected with driving motor (2), and the rotation axis (10) is equipped with torquemeter (4),
Stationary fixture A (5) and stationary fixture B (9), is connected on workbench (15), and one is clamped in each stationary fixture and is accompanied
Try rolling bearing,
Floating holder (8), between stationary fixture A (5) and stationary fixture B (9), by opposed upper activity divide fixture (81) and
Lower activity divides fixture (82) to form, and at least one subject rolling bearing, the subject are clamped in the floating holder (8)
Rolling bearing and examination rolling bearing coaxial arrangement is accompanied, and is set in rotation axis (10),
Temperature sensor (16) is arranged in floating holder (8), and is contacted with subject rolling bearing,
Lead screw transmission alternating load loading unit (7) is respectively acting on the charging assembly that each activity divides on fixture by two and forms,
Each charging assembly is by the electric rotating machine (17), lead-screw drive mechanism, load loading spring (18) and the connector that are sequentially connected successively
(19) form, the connector (19) is connected with floating holder (8), and the load loading spring (19) of two charging assemblies is in
Line-styled is opposite disposed, the telescopic direction of each load loading spring (19) in rotation axis (10) in the radial direction, institute
The lead-screw drive mechanism stated is made of worm screw (71), ball nut (72) and leading screw (73), and the leading screw (73) is threaded through rolling
In pearl nut (72), the worm screw (71) is nibbled with ball nut (72) by being arranged on the screw thread of ball nut (72) lateral surface
Connection is closed, the worm screw (71) and ball nut (72) are fixed on by fixed frame (76) on workbench (15), described
The axis direction of leading screw (73) is consistent with the telescopic direction of load loading spring (18), and one end of leading screw (73) is connected by leading screw
Plate (75) is connected with load loading spring (18), and the worm screw (71) is sequentially connected with electric rotating machine (17).
2. the rolling bearing fatigue life experimental rig of lead screw transmission loading alternating load according to claim 1, special
Sign is that the worm screw (71) and the screw thread of ball nut (72) lateral surface form self locking type worm gear-worm structure.
3. the rolling bearing fatigue life experimental rig of lead screw transmission loading alternating load according to claim 1, special
Sign is, each charging assembly is set there are two electric rotating machine (17), and the both ends with worm screw (71) are connected by driven by clutches respectively
It connects.
4. the rolling bearing fatigue life experimental rig of lead screw transmission loading alternating load according to claim 1, special
Sign is that the junction of the leading screw connecting plate (75) and leading screw (73) is equipped with swivel bearing (74), the leading screw (73)
One end pass through the swivel bearing (74) and leading screw connecting plate (75) and be rotatablely connected.
5. the rolling bearing fatigue life experimental rig of lead screw transmission loading alternating load according to claim 1, special
Sign is, two subject rolling bearings are clamped in the floating holder (8).
6. the rolling bearing fatigue life experimental rig of lead screw transmission loading alternating load according to claim 1, special
Sign is that the upper activity divides the bottom of fixture (81) to be equipped with upper arc groove, and the lower activity divides the top of fixture (82)
Equipped with lower arcuate slot, upper arc groove and lower arcuate slot match somebody with somebody the clamping part for being combined into and matching with rolling bearing, and the leading screw passes
Dynamic alternating load loading unit (7) is made of upper charging assembly and lower charging assembly, and the upper charging assembly is arranged on work
Dynamic to divide the top of fixture (81) and act on the top that activity divides fixture (81), the lower charging assembly is arranged on lower activity
Divide the lower section of fixture (82) and act on the bottom that lower activity divides fixture (82).
7. the rolling bearing fatigue life experimental rig of lead screw transmission loading alternating load according to claim 6, special
Sign is that the temperature sensor (16) is arranged in arc groove or lower arcuate slot, and is contacted with the outer ring of rolling bearing.
8. the rolling bearing fatigue life experimental rig of lead screw transmission loading alternating load according to claim 1, special
Sign is that the rotation axis (10) is sequentially connected by shaft coupling (3) and driving motor (2).
9. the rolling bearing fatigue life experimental rig of lead screw transmission loading alternating load according to claim 1, special
Sign is, the device further include respectively with driving motor (2), temperature sensor (16), torquemeter (4) and electric rotating machine (17)
Communicate the controller of connection.
10. the rolling bearing fatigue life experimental rig of lead screw transmission loading alternating load according to claim 9, special
Sign is, which further includes for accompany examination rolling bearing and be tested the oil supply mechanism (6) that rolling bearing provides lubricating oil, institute
The oil supply mechanism (6) stated is connected with controller communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711458330.5A CN108051210A (en) | 2017-12-28 | 2017-12-28 | Lead screw transmission loads the rolling bearing fatigue life experimental rig of alternating load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711458330.5A CN108051210A (en) | 2017-12-28 | 2017-12-28 | Lead screw transmission loads the rolling bearing fatigue life experimental rig of alternating load |
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| Publication Number | Publication Date |
|---|---|
| CN108051210A true CN108051210A (en) | 2018-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711458330.5A Withdrawn CN108051210A (en) | 2017-12-28 | 2017-12-28 | Lead screw transmission loads the rolling bearing fatigue life experimental rig of alternating load |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161803A (en) * | 2020-09-16 | 2021-01-01 | 上海市轴承技术研究所 | Rolling bearing life-span energy consumption testing machine under combined load |
| CN112649194A (en) * | 2021-01-11 | 2021-04-13 | 山东大学 | Ball screw pair loading test device and test method |
| CN112763207A (en) * | 2021-01-14 | 2021-05-07 | 沈睿 | Testing method for worm gear reducer |
| CN113345350A (en) * | 2021-07-21 | 2021-09-03 | 青岛拉瓦勒智能科技有限公司 | Optical flat plate device for air imaging |
-
2017
- 2017-12-28 CN CN201711458330.5A patent/CN108051210A/en not_active Withdrawn
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112161803A (en) * | 2020-09-16 | 2021-01-01 | 上海市轴承技术研究所 | Rolling bearing life-span energy consumption testing machine under combined load |
| CN112649194A (en) * | 2021-01-11 | 2021-04-13 | 山东大学 | Ball screw pair loading test device and test method |
| CN112649194B (en) * | 2021-01-11 | 2021-10-22 | 山东大学 | Ball screw pair loading test device and test method |
| CN112763207A (en) * | 2021-01-14 | 2021-05-07 | 沈睿 | Testing method for worm gear reducer |
| CN112763207B (en) * | 2021-01-14 | 2023-09-29 | 临沂市鲁钰机械有限公司 | Worm gear reducer testing method |
| CN113345350A (en) * | 2021-07-21 | 2021-09-03 | 青岛拉瓦勒智能科技有限公司 | Optical flat plate device for air imaging |
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Application publication date: 20180518 |
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