CN208091695U - Lead screw transmission loads the rolling bearing fatigue life experimental rig of radially alternating load - Google Patents
Lead screw transmission loads the rolling bearing fatigue life experimental rig of radially alternating load Download PDFInfo
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- CN208091695U CN208091695U CN201721876988.3U CN201721876988U CN208091695U CN 208091695 U CN208091695 U CN 208091695U CN 201721876988 U CN201721876988 U CN 201721876988U CN 208091695 U CN208091695 U CN 208091695U
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- rolling bearing
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- lead screw
- alternating load
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Abstract
The utility model is related to the rolling bearing fatigue life experimental rigs that a kind of lead screw transmission loads radially alternating load, the device controls the rotation of driving motor by computer, drive rolling bearing with given rotation speed operation, in the radially alternating load loading unit of lead screw transmission, the rotary motion of electric rotating machine is converted into 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, by adding the load that bearing alternating load may be implemented in the radially alternating load loading unit of multiple lead screw transmissions 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 utility model can accurately realize the load of the radially alternating load of rolling bearing, in conjunction with the real working condition condition of internal combustion engine, carry out rolling bearing fatigue life test.
Description
Technical field
The utility model belongs to engine rolling bearing life experiment field, and it is radially alternating to be related to a kind of lead screw transmission load
The rolling bearing fatigue life experimental rig of load.
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 the most key one of the 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.
Currently, car engine main bearing, camshaft bearing and connecting rod bottom-end bearing are mainly using sliding bearing, it is few
The camshaft bearing of number engine uses 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 load load of test bearing is as axis
The important parameter of testing machine test is held, accuracy directly affects the test result of bearing.Rolling bearing experiment traditional at present
Device loading characteristic is single, can not achieve the load 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
The purpose of this utility model is exactly to provide a kind of lead screw transmission to overcome the problems of the above-mentioned prior art
Load the rolling bearing fatigue life experimental rig of radially alternating load.
The purpose of this utility model can be achieved through the following technical solutions：
A kind of lead screw transmission loads the rolling bearing fatigue life experimental rig of radially alternating load, for measuring the axis of rolling
The fatigue life under the effect of radially alternating load is held, the rolling bearing is distributed by outer ring, inner ring and by retainer
Multiple rolling elements composition between inner ring and outer ring, which includes,
Workbench,
Driving motor is connected on workbench,
Rotary shaft is sequentially connected with driving motor, and the rotary shaft 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 divides fixture and lower activity point between stationary fixture A and stationary fixture B 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,
The radially alternating load loading unit of lead screw transmission, the charging assembly acted on floating holder by four form, respectively
Charging assembly is made of electric rotating machine, lead-screw drive mechanism, load loading spring and the connector being sequentially connected successively, described
Connector is connect with floating holder, and the load loading spring of four charging assemblies is in " ten " set up of character patt ern, and each load loads bullet
The telescopic direction of spring is on direction radially of the axis of rotation, and the lead-screw drive mechanism is by worm screw, ball nut and leading screw group
At the leading screw is threaded through in ball nut, and the worm screw is with ball nut by being arranged in ball nut lateral surface
Screw thread engagement connection, the worm screw and ball nut are fixed on by fixed frame on workbench, the axis of the leading screw
Direction is consistent with the telescopic direction of load loading spring, and one end of leading screw is connect by leading screw connecting plate with load loading spring,
The worm screw is sequentially connected with electric rotating machine.
Preferably, the screw thread outside the worm screw and ball screws forms self locking type worm gear-worm structure.
Preferably, the junction of the leading screw connecting plate and leading screw is equipped with swivel bearing, and one end of the leading screw is logical
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 are passed with the clamping part to match with rolling bearing, the leading screw is combined into
Radius vector is made of to alternating load loading unit upper charging assembly, lower charging assembly, left charging assembly and right charging assembly, described
Upper charging assembly be arranged and divide the top of fixture in upper activity and act on the top that upper activity divides fixture, the lower load group
Part, which is arranged, to be divided the lower section of fixture in lower activity and acts on the bottom that lower activity divides fixture, and the left charging assembly is arranged in work
The left side of dynamic fixture simultaneously acts on the junction that activity divides fixture and lower activity divides fixture, and right charging assembly setting exists
The right side of floating holder simultaneously acts on the junction that activity divides fixture and lower activity divides fixture.
Preferably, the temperature sensor is arranged in upper arc groove or lower arcuate slot, and with the outer ring of rolling bearing
Contact.
Preferably, which further includes communicating to connect respectively with driving motor, temperature sensor, torquemeter and electric rotating machine
The controller connect.
Preferably, the device further include for for accompany examination rolling bearing and be tested rolling bearing provide lubricating oil for oil machine
Structure, the oil supply mechanism are connect with controller communication.
The operation principle of the utility model is：
Computer controls the rotation of driving motor, drives rolling bearing with given rotation speed operation.In lead screw transmission radial direction
In alternating load loading unit, the rotation of electric rotating machine is controlled by computer, by lead-screw drive mechanism by electric rotating
The rotary motion of machine is converted to linear motion, can influence the stretching/compressing amount of spring.Due to the stretching/compressing amount of spring
Change, spring will can apply of different sizes, direction-agile active force on floating holder surface.By in floating holder difference
Add the load that bearing alternating load may be implemented in the radially alternating load loading unit of multiple lead screw transmissions in region.Computer passes through
Oil supply mechanism controls the oil mass supply in rolling bearing operation process, and torquemeter and temperature sensor can be used for detecting the axis of rolling
Hold the performance in operation process.
Compared with prior art, the utility model 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, the load of the alternating load of rolling bearing in radial directions may be implemented.
(2) the real working condition condition for combining internal combustion engine controls rotation angle and the time of electric rotating machine by computer
The load of internal combustion engine real working condition load may be implemented in variable quantity.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 load.
(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 load, the accuracy of load load is further improved.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the schematic diagram of the radially alternating load loading unit of lead screw transmission of the utility model；
Fig. 3 is the structural schematic diagram of the leading screw transport mechanism of the utility model：
Fig. 4 is the schematic top plan view of the leading screw transport mechanism of the utility model.
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 fuel feeding
Mechanism, 7 be the radially alternating load loading unit of lead screw transmission, and 71 be worm screw, and 72 be ball nut, and 73 be leading screw, and 74 be rotation
Bearing, 75 be leading screw connecting plate, and 76 be fixed frame, and 8 be floating holder, and 81 divide fixture for upper activity, and 82 be lower activity point folder
Tool, 9 be stationary fixture B, and 10 be rotary shaft, and 11 is accompany examination rolling bearing B, and 12 be subject rolling bearing B, and 13 be the subject axis of rolling
A is held, 14 is accompany examination rolling bearing A, and 15 be workbench, and 16 be temperature sensor, and 17 be electric rotating machine, and 19 load for load
Spring, 20 be connector.
Specific implementation mode
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment 1
A kind of lead screw transmission loads the rolling bearing fatigue life experimental rig of radially alternating load, for measuring the axis of rolling
The fatigue life under the effect of radially alternating load is held, the rolling bearing is distributed by outer ring, inner ring and by retainer
Multiple rolling elements composition between inner ring and outer ring, which includes,
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,
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 A 14 and accompany examination rolling bearing B 11
Play the role of supporting rotary shaft 10,
Floating holder 8 divides fixture 81 He between stationary fixture A5 and stationary fixture B9 by upper activity opposite to each other up and down
Lower activity divides fixture 82 to form, and is clamped at least one subject rolling bearing in the floating holder 8, is clamped in the present embodiment
There are two rolling bearing is tested, it is respectively tested rolling bearing A13 and subject rolling bearing B12, the subject rolling bearing
Rolling bearing coaxial arrangement is tried with accompanying, and is set in rotary shaft 10,
Temperature sensor 16 is arranged in floating holder 8, and is contacted with subject rolling bearing,
The radially alternating load loading unit 7 of lead screw transmission, the charging assembly acted on floating holder by four form, respectively
Charging assembly is by 20 groups of electric rotating machine 17, lead-screw drive mechanism, load loading spring 19 and connector being sequentially connected successively
At, the connector 20 is connect with floating holder 8, and the load loading spring 19 of four charging assemblies is in " ten " set up of character patt ern,
The telescopic direction of each load loading spring 19 rotary shaft 10 in the radial direction, the lead-screw drive mechanism is by worm screw
71, ball nut 72 and leading screw 73 form, and the leading screw 73 is threaded through in ball nut 72, the worm screw 71 and ball spiral shell
Mother 72 passes through solid by the way that the screw thread engagement connection in 72 lateral surface of ball nut, the worm screw 71 and ball nut 72 is arranged
Determine frame 76 to be fixed on workbench 15, the axis direction of the leading screw 73 and the telescopic direction one of load loading spring 19
It causes, one end of leading screw 73 is connect by leading screw connecting plate 75 with load loading spring 19, the worm screw 71 and electric rotating machine 17
It is sequentially connected.
In the present embodiment, each charging assembly is set there are one electric rotating machine 17, as shown in figure 4, and passing through the electric rotating machine
17 positive and negative rotation realizes that the load of alternating load, worm screw 71 and the screw thread of 72 lateral surface of ball nut form self locking type worm gear-worm
Structure, and leading screw connecting plate 75 and the junction of leading screw 73 are equipped with swivel bearing 74, and one end of leading screw 73 passes through the rotary shaft
74 are held to be rotatablely connected with leading screw connecting plate 75.
In the present embodiment, 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
Portion is equipped with lower arcuate slot, and upper arc groove and lower arcuate slot, which are matched, is combined into the clamping part to match with rolling bearing, temperature sensor
16 settings contact in upper arc groove or lower arcuate slot, and with the outer ring of rolling bearing.The radially alternating load of the lead screw transmission
Lotus loading unit is made of upper charging assembly, lower charging assembly, left charging assembly and right charging assembly, the upper charging assembly
It is arranged and divides the top of fixture 81 in upper activity and act on the top that upper activity divides fixture 81, lower charging assembly setting exists
Lower activity divides the lower section of fixture 82 and acts on the bottom that lower activity divides fixture 82, and left charging assembly setting is pressed from both sides in activity
The left side of tool 8 simultaneously acts on the junction that activity divides fixture 81 and lower activity divides fixture 82, right charging assembly setting
On the right side of floating holder 8 and act on the junction that upper activity divides fixture 81 and lower activity divides fixture 82.
The device further includes communicating to connect respectively with driving motor 2, temperature sensor 16, torquemeter 4 and each electric rotating machine
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 also includes for being that 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 lead screw transmission radial direction
In alternating load loading unit, the rotation of electric rotating machine is controlled by computer, by lead-screw drive mechanism by electric rotating
The rotary motion of machine is converted to linear motion, can influence the stretching/compressing amount of spring.Due to the stretching/compressing amount of spring
Change, spring will can apply of different sizes, direction-agile active force on floating holder surface.By in floating holder difference
Add the load that bearing alternating load may be implemented in the radially alternating load loading unit of multiple lead screw transmissions in region.Computer passes through
Oil supply mechanism controls the oil mass supply in rolling bearing operation process, and torquemeter and temperature sensor can be used for detecting the axis of rolling
Hold the performance in 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 easily can make various modifications to these embodiments, and general original described herein
It ought to use in other embodiment without having to go through creative labor.Therefore, the utility model is not limited to the above embodiments, this
Field technology personnel announcement according to the present utility model, does not depart from improvement that the utility model scope is made and modification all should
It is within the protection scope of the utility model.
Claims (9)
1. a kind of lead screw transmission loads the rolling bearing fatigue life experimental rig of radially alternating load, for measuring rolling bearing
Fatigue life under the effect of radially alternating load, the rolling bearing are distributed in by outer ring, inner ring and by retainer
Multiple rolling elements composition between inner ring and outer ring, which is characterized in that the device includes workbench (15),
Driving motor (2) is connected on workbench (15),
Rotary shaft (10) is sequentially connected with driving motor (2), and the rotary shaft (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 accompanies
Rolling bearing is tried,
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 rotary shaft (10),
Temperature sensor (16), setting contact in floating holder (8), and with subject rolling bearing,
The radially alternating load loading unit 7 of lead screw transmission, the charging assembly acted on floating holder by four form, each to load
Component is by electric rotating machine (17), lead-screw drive mechanism, load loading spring (19) and connector (20) group for being sequentially connected successively
At the connector (20) is connect with floating holder (8), and the load loading spring (19) of four charging assemblies is in " ten " font
Setting, the telescopic direction of each load loading spring (19) rotary shaft (10) in the radial direction, the lead screw transmission
Mechanism is made of worm screw (71), ball nut (72) and leading screw (73), and the leading screw (73) is threaded through in ball nut (72),
Screw thread of the worm screw (71) with ball nut (72) by setting in ball nut (72) lateral surface engages connection, described
Worm screw (71) and ball nut (72) are fixed on by fixed frame (76) on workbench (15), the axis of the leading screw (73)
Direction is consistent with the telescopic direction of load loading spring (19), and one end of leading screw (73) is added by leading screw connecting plate (75) with load
It carries spring (19) to connect, the worm screw (71) is sequentially connected with electric rotating machine (17).
2. lead screw transmission according to claim 1 loads the rolling bearing fatigue life experimental rig of radially alternating load,
It is characterized in that, the screw thread outside the worm screw and ball screws forms self locking type worm gear-worm structure.
3. lead screw transmission according to claim 1 loads the rolling bearing fatigue life experimental rig of radially alternating load,
It is characterized in 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 is rotatablely connected by the swivel bearing (74) and leading screw connecting plate (75).
4. lead screw transmission according to claim 1 loads the rolling bearing fatigue life experimental rig of radially alternating load,
It is characterized in that, being clamped with two subject rolling bearings in the floating holder (8).
5. lead screw transmission according to claim 1 loads the rolling bearing fatigue life experimental rig of radially alternating load,
It is characterized in that, the upper activity divides the bottom of fixture (81) to be equipped with upper arc groove, the lower activity divides fixture (82)
Top is equipped with lower arcuate slot, and upper arc groove and lower arcuate slot, which are matched, is combined into the clamping part to match with rolling bearing, the silk
Thick stick is driven radially alternating load loading unit and is made of upper charging assembly, lower charging assembly, left charging assembly and right charging assembly,
The described upper charging assembly setting divides the top of fixture (81) in upper activity and acts on the top that upper activity divides fixture (81), institute
The lower charging assembly setting stated divides the lower section of fixture (82) in lower activity and acts on the bottom that lower activity divides fixture (82), described
The setting of left charging assembly in the left side of floating holder (8) and act on upper activity fixture (81) and lower activity divided to divide fixture (82)
Junction, the right charging assembly setting the right side of floating holder (8) and act on upper activity divide fixture (81) and under
Activity divides the junction of fixture (82).
6. lead screw transmission according to claim 5 loads the rolling bearing fatigue life experimental rig of radially alternating load,
It is characterized in that, the temperature sensor (16) is arranged in upper arc groove or lower arcuate slot, and with the outer ring of rolling bearing
Contact.
7. lead screw transmission according to claim 1 loads the rolling bearing fatigue life experimental rig of radially alternating load,
It is characterized in that, the rotary shaft (10) is sequentially connected by shaft coupling (3) and driving motor (2).
8. lead screw transmission according to claim 1 loads the rolling bearing fatigue life experimental rig of radially alternating load,
It is characterized in that, the device further include respectively with driving motor (2), temperature sensor (16), torquemeter (4) and electric rotating machine
(17) controller of communication connection.
9. lead screw transmission according to claim 8 loads the rolling bearing fatigue life experimental rig of radially alternating load,
It is characterized in that, the device further includes for providing the oil supply mechanism of lubricating oil to accompany examination rolling bearing and being tested rolling bearing
(6), the oil supply mechanism (6) is connect with controller communication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721876988.3U CN208091695U (en) | 2017-12-28 | 2017-12-28 | Lead screw transmission loads the rolling bearing fatigue life experimental rig of radially alternating load |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721876988.3U CN208091695U (en) | 2017-12-28 | 2017-12-28 | Lead screw transmission loads the rolling bearing fatigue life experimental rig of radially alternating load |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208091695U true CN208091695U (en) | 2018-11-13 |
Family
ID=64064928
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721876988.3U Expired - Fee Related CN208091695U (en) | 2017-12-28 | 2017-12-28 | Lead screw transmission loads the rolling bearing fatigue life experimental rig of radially alternating load |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208091695U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112649194A (en) * | 2021-01-11 | 2021-04-13 | 山东大学 | Ball screw pair loading test device and test method |
| CN113820130A (en) * | 2021-08-30 | 2021-12-21 | 东莞材料基因高等理工研究院 | Device for neutron in-situ measurement of fatigue strain of bearing |
-
2017
- 2017-12-28 CN CN201721876988.3U patent/CN208091695U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN113820130A (en) * | 2021-08-30 | 2021-12-21 | 东莞材料基因高等理工研究院 | Device for neutron in-situ measurement of fatigue strain of bearing |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20181113 Termination date: 20201228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |