CN207866501U - Rack-and-pinion loads the rolling bearing fatigue life experimental rig of radially alternating load - Google Patents

Abstract

The utility model is related to the rolling bearing fatigue life experimental rigs that a kind of rack-and-pinion 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 rack-and-pinion, the rotary motion of electric rotating machine is converted into linear motion by rack and pinion drive mechanism, 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 the radially alternating load loading unit of multiple rack-and-pinion realizes the radially alternating load of bearing 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

Rack-and-pinion loads the rolling bearing fatigue life experimental rig of radially alternating load

Technical field

The utility model belongs to engine rolling bearing life testing field, and it is radially alternating to be related to a kind of rack-and-pinion 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 rack-and-pinion 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 rack-and-pinion 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,

Two stationary fixtures, are connected on workbench, and one is clamped in each stationary fixture and accompanies examination rolling bearing,

Floating holder is located 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,

The radially alternating load loading unit of rack-and-pinion, the charging assembly acted on floating holder by four form, respectively Charging assembly is made of electric rotating machine, rack and pinion drive mechanism, load loading spring and the connector being sequentially connected successively, institute The connector stated 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 adds The telescopic direction of spring is carried on direction radially of the axis of rotation, the rack and pinion drive mechanism by being sequentially connected successively Gear and rack composition, the rack and the rack sliding seat that is arranged on the workbench company of sliding on rack length direction It connects and rack length direction is consistent with load loading spring telescopic direction, one end of rack is added by rack connecting plate with load Spring connection is carried, gear is sequentially connected with electric rotating machine.

Preferably, the output shaft of the electric rotating machine is equipped with the worm screw being meshed with gear, and the gear passes through 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 and the length direction of rack are parallel, 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 constitute by upper activity opposite to each other 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 With the clamping part to match with rolling bearing is combined into, the radially alternating load load of the rack-and-pinion is single for slot and lower arcuate slot Member is made of upper charging assembly, lower charging assembly, left charging assembly and right charging assembly, and the upper charging assembly is arranged upper Activity divides the top of fixture and acts on the top that activity divides fixture, and the lower charging assembly is arranged divides fixture in lower activity Lower section and act on the bottom that lower activity divides fixture, the left charging assembly is arranged in the left side of floating holder and acts on Upper activity divides fixture and lower activity divides the junction of fixture, the right charging assembly to be arranged in the right side of floating holder and effect Fixture and lower activity is divided to divide the junction of fixture in upper activity.

Preferably, the temperature sensor is arranged in upper 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 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 rack-and-pinion radial direction 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 The load of the radially alternating load of bearing may be implemented in the different zones addition radially alternating load loading unit of rack-and-pinion.Computer The oil mass supply in rolling bearing operation process is controlled 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 utility model 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 load of the alternating load of rolling bearing in radial directions may be implemented in the elastic force of spring.

(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.

(4) utilize rack-and-pinion transport mechanism transmission efficiency the advantages of, improve load load accuracy and into One step worm screw is set creatively between electric rotating machine and gear, plays the role of deceleration torque, alleviates electric rotating machine Burden, low power electric rotating machine can be selected.

(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 load further improves the accuracy of load load.

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 rack-and-pinion 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 is for oil machines Structure, 7 be the radially alternating load loading unit of rack-and-pinion, 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 electric rotating machine B, and 221 be worm screw B, and 222 be gear B, and 223 be rack B, and 224 be rack sliding seat B, 225 It is load loading spring B for rack connecting plate B, 23,24 be connector B, and 25 connector C, 26 be load loading spring C, and 27 are Electric rotating machine C, 281 be worm screw C, and 282 be gear C, and 283 be rack C, and 284 be rack sliding seat C, and 285 be rack connecting plate C, 29 connector D, 30 be load loading spring D, and 311 be worm screw D, and 312 be gear D, and 313 be rack D, and 314 be rack sliding seat D, 315 be rack connecting plate D, and 32 be electric rotating machine D.

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 rack-and-pinion loads the rolling bearing fatigue life experimental rig of radially alternating load, as shown in Fig. 1~2, For measure rolling bearing radially alternating load effect under fatigue life, the rolling bearing by outer ring, inner ring and The multiple rolling elements composition being distributed in by retainer 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,

Two stationary fixtures --- stationary fixture A5 and stationary fixture B9, is connected on workbench 15, stationary fixture A5 It is inside clamped with to accompany to be clamped in examination rolling bearing A14, stationary fixture B9 and accompanies examination rolling bearing B11, accompany examination rolling bearing A14 and accompany Examination rolling bearing B 11 plays 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 It applies clamping in example and is respectively tested rolling bearing A13 and subject rolling bearing B12, each subject rolling there are two rolling bearing is tested Dynamic 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 each subject rolling bearing,

The radially alternating load loading unit 7 of rack-and-pinion, the charging assembly acted on floating holder by four form, respectively Charging assembly is made of electric rotating machine, rack and pinion drive mechanism, load loading spring and the connector being sequentially connected successively, institute The connector stated 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 adds The telescopic direction of spring is carried on direction radially of the axis of rotation, the rack and pinion drive mechanism by being sequentially connected successively Gear and rack composition, the rack are slided with the rack sliding seat being arranged on workbench 15 on rack length direction It connects and rack length direction is consistent with load loading spring telescopic direction, one end of rack passes through rack connecting plate and load Loading spring connects, and gear is sequentially connected with electric rotating machine, and charging assembly further includes being arranged in electric rotating machine in the present embodiment The worm screw being meshed on output shaft and with gear, the gear are sequentially connected by worm screw and electric rotating machine.

In the present embodiment, as shown in Fig. 2, floating holder divides fixture and lower activity to divide fixture structure by upper activity opposite to each other up and down At, the upper activity divides the bottom of fixture to be equipped with upper arc groove, and the lower activity divides the top of fixture to be equipped with lower arcuate slot, Upper arc groove and lower arcuate slot are arranged with the clamping part to match with rolling bearing, temperature sensor 16 is combined into upper arc groove Or in lower arcuate slot, and contacted with the outer ring of rolling bearing.The radially alternating load loading unit of rack-and-pinion 7 is by upper load group Part, lower charging assembly, left charging assembly and right charging assembly are constituted.The top for dividing fixture 81 in upper activity is arranged in upper charging assembly And the top that activity divides fixture 81 is acted on, by the electric rotating machine A17, rack and pinion drive mechanism A, load being sequentially connected successively Lotus loading spring A19 and connector A20 compositions, rack and pinion drive mechanism A is by the worm screw A181, the gear that are sequentially connected successively A182 and rack A183 compositions, rack A183 and the rack sliding seat A184 that is arranged on workbench 15 are in rack A183 length It is slidably connected on direction, the bottom end of rack A183 is connect by rack connecting plate A185 with load loading spring A19, worm screw A181 It is sequentially connected with electric rotating machine A17.Left charging assembly is arranged in the left side of floating holder 8 and acts on upper activity and divide fixture 81 He Lower activity divides the junction of fixture 82, is loaded by the electric rotating machine B21, rack and pinion drive mechanism B, load that are sequentially connected successively Spring B 23 and connector B24 composition, rack and pinion drive mechanism B is by the worm screw B221, gear B 222 and the tooth that are sequentially connected successively B223 composition, rack B223 and the rack sliding seat B224 being arranged on workbench 15 are sliding on rack B223 length directions Dynamic connection, the top of rack B223 are connect by rack connecting plate B225 with load loading spring B22, worm screw B221 and electric rotating Machine B21 is sequentially connected.Right charging assembly be arranged the right side of floating holder 8 and act on upper activity divide fixture 81 and it is lower activity point The junction of fixture 82, by the electric rotating machine C27, rack and pinion drive mechanism C, load loading spring C26 being sequentially connected successively It is formed with connector C25, rack and pinion drive mechanism C is by the worm screw C281, gear C 282 and rack C283 that are sequentially connected successively Composition, rack C283 and the rack sliding seat C284 that is arranged on workbench 15 company of sliding on rack C283 length directions It connects, the top of rack C283 is connect by rack connecting plate C285 with load loading spring C26, worm screw C281 and electric rotating machine C27 is sequentially connected.Lower charging assembly, which is arranged, to be divided the lower section of fixture 82 in lower activity and acts on the bottom that lower activity divides fixture 82, It is made of the electric rotating machine D32, rack and pinion drive mechanism D, load loading spring D30 and the connector D29 that are sequentially connected successively, Rack and pinion drive mechanism D is made of the worm screw D311, gear D 312 and rack D313 being sequentially connected successively, rack D313 with set The rack sliding seat D314 set on workbench 15 is slidably connected on rack D313 length directions, and the top of rack D313 is logical It crosses rack connecting plate D315 to connect with load loading spring D30, worm screw D311 is sequentially connected with electric rotating machine D32.The present embodiment In worm screw and gear form self locking type worm gear-worm structure.The axis of worm screw is parallel with the length direction of rack, and worm screw With rack separation gear both sides.

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 rack-and-pinion radial direction 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 add the load that bearing alternating load may be implemented in the radially alternating load loading unit of multiple rack-and-pinion.Computer The oil mass supply in rolling bearing operation process is controlled 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 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 (10)

1. a kind of rack-and-pinion 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,

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 is located between two stationary fixtures, divides fixture to form by two opposed activities, in the floating holder It is clamped at least one subject rolling bearing, the subject rolling bearing and accompanies examination rolling bearing coaxial arrangement, and cover If 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 rack-and-pinion, the charging assembly acted on floating holder by four form, each to load Component is made of electric rotating machine, rack and pinion 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 rack and pinion drive mechanism is by the gear that is sequentially connected successively It is formed with rack, the rack is slidably connected simultaneously with the rack sliding seat being arranged on workbench on rack length direction And rack length direction is consistent with load loading spring telescopic direction, one end of rack loads bullet by rack connecting plate and load Spring connects, and gear is sequentially connected with electric rotating machine.

2. rack-and-pinion according to claim 1 loads the rolling bearing fatigue life experimental rig of radially alternating load, It is characterized in that, the output shaft of the electric rotating machine is equipped with the worm screw being meshed with gear, the gear passes through worm screw It is sequentially connected with electric rotating machine.

3. rack-and-pinion according to claim 2 loads the rolling bearing fatigue life experimental rig of radially alternating load, It is characterized in that, the worm screw forms self locking type worm gear-worm structure with gear.

4. rack-and-pinion according to claim 2 or 3 loads the rolling bearing fatigue life experiment dress of radially alternating load It sets, 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.

5. rack-and-pinion 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.

6. rack-and-pinion according to claim 1 loads the rolling bearing fatigue life experimental rig of radially alternating load, It is characterized in that, the floating holder divides fixture and lower activity that fixture is divided to constitute by upper activity opposite to each other 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 with being combined into the clamping part to match with rolling bearing, the radially alternating load loading unit of the rack-and-pinion by Upper charging assembly, lower charging assembly, left charging assembly and right charging assembly are constituted, and the upper charging assembly is arranged in upper activity Divide the top of fixture and act on the top that activity divides fixture, the lower charging assembly is arranged in the case where lower activity divides fixture Side simultaneously acts on the bottom that lower activity divides fixture, and the left charging assembly is arranged in the left side of floating holder and acts on upper work It is dynamic to divide fixture and lower activity that the junction of fixture, the right charging assembly is divided to be arranged on the right side of floating holder and act on Activity divides fixture and lower activity to divide the junction of fixture.

7. rack-and-pinion according to claim 1 loads the rolling bearing fatigue life experimental rig of radially alternating load, It is characterized in that, the temperature sensor setting contacts in upper arc groove or lower arcuate slot, and with the outer ring of rolling bearing.

8. rack-and-pinion according to claim 1 loads the rolling bearing fatigue life experimental rig of radially alternating load, It is characterized in that, the rotary shaft is sequentially connected by shaft coupling and driving motor.

9. rack-and-pinion according to claim 1 loads the rolling bearing fatigue life experimental rig of radially alternating load, It is characterized in that, the device further includes being connected respectively with the communication of driving motor, temperature sensor, torquemeter and electric rotating machine Controller.

10. rack-and-pinion according to claim 9 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, The oil supply mechanism is connect with controller communication.