CN104111171B - Drive unit for rotating outer ring and fixing inner ring of airplane wheel bearing - Google Patents
Drive unit for rotating outer ring and fixing inner ring of airplane wheel bearing Download PDFInfo
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- CN104111171B CN104111171B CN201410293088.0A CN201410293088A CN104111171B CN 104111171 B CN104111171 B CN 104111171B CN 201410293088 A CN201410293088 A CN 201410293088A CN 104111171 B CN104111171 B CN 104111171B
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Abstract
The invention relates to a drive unit for rotating an outer ring and fixing an inner ring of an airplane wheel bearing. The drive unit is composed of a motor, a clutch, bearing seats, a drum wheel, a wheel axle and a coupler. The wheel axle is installed at the two bearing seats; and one end of the wheel axle is connected with a flange arranged at one end of the clutch by the coupler. The drum wheel is installed at the wheel axle by a key and is between the two bearing seats; and the external circumferential surface of the drum wheel rubs against the circumferential surface of a rubber wheel installed at a loading device in a cooperative mode. The rubber wheel is sleeved at the outer ring of the tested bearing. A brake plate is fixed at one end surface of the rubber wheel by a flange; and the braking disc of the brake plate is arranged at a braking clamping plate of a brake. The upper end of the brake is fixed at the lower surface of a loading substrate of the loading device. According to the invention, the working situation of the wheel bearing of the airplane in a sliding state can be simulated; and the bearing load is large and the rotating speed is fast. Therefore, the provided drive unit can be applied to various bearing testing machines.
Description
Technical field
The present invention relates to the driving means that a kind of airplane wheel bearing outer ring temperature of inner ring during rotation is fixing, specifically a kind of aircraft machine
The driving means that wheel bearing outer ring temperature of inner ring during rotation is fixing.
Background technology
Along with the development of aircraft, take off and be gradually increased, during taking-off and landing with speed when landing and weight
Security issues become increasingly urgent, requires more and more higher to the performance and reliability of wheel bearing, and it is related to the peace of aircraft
Entirely make a return voyage, continue fight capability and adapt to the ability on airport.
Wheel bearing is not only used to support wheel, guides the direction of rotation of wheel, reduces the friction in rotation process, and
Bear the various load between wheel and wheel shaft.And, bearing is to the service behaviour of aircraft, life-span, every economy
Index and reliability all have a significant impact, and will also result in flight safety accident the most in some cases.
As the wheel bearing of consumable accessory, because the accident that wheel bearing fails normally to work accounts for certain ratio, therefore
The most effectively improve safety during aircraft landing, improve aircraft to various load situation, runway condition, weather bar
The adaptation ability of part, becomes the main goal in research of airplane wheel bearing.
The motion mode of major part bearing is that outer ring is fixed, inner ring rotates.Airplane wheel bearing has its unique distinction, district
Being not the motion mode that outer ring rotates, inner ring is fixing in the feature that other bearings are maximum, and it is in use
Operating mode.
Along with current countries in the world are increasing to the demand of large transport airplane, develop the wheel of higher rotating speed more heavy load
Bearing is more urgent, and people also it is becoming increasingly recognized that the importance of wheel bearing test.Bearing test is that bearing sets
An indispensable important proof procedure in meter and manufacture process, according to the actual installation of bearing on bearing tester
Operating mode, the rotating speed of actual motion state, i.e. bearing, axial load, radial load and ambient temperature, lubricating status
Operate Deng according to actual condition is given, reach predetermined age or to bearing failure.
Bearing tester is of a great variety the most both at home and abroad, can be railway bearing, wind power bearing and machine bearing isometry
Holding testing machine, typical example such as Chinese patent CN201210103079, major part the most generally makes electricity consumption master
Axle drives the inner ring of the test bearing being arranged in bearing block to rotate.With the bearing test driving test bearing outer ring to rotate
Machine is considerably less.
Chinese patent CN201010254885 discloses the rolling bearing simulation test that a kind of outer ring temperature of inner ring during rotation is fixing
Method.When this type of method is implemented, being connected with the outer ring of test bearing by shaft coupling by rotor, bearing inner race is solid
Due to inner ring axle, inner ring axle is fixed on loading and puts.During test, motor is by outside shaft coupling direct motoring ring test bearing
Circle synchronous rotary, during radial loaded, radial force is put on the inner ring of test bearing by inner ring axle.
This utilization drives the method for motor direct motoring ring test bearing outer ring synchronous rotary, and defect is a lot.
On the one hand, when carrying out radial loaded, radial force puts on the inner ring of test bearing from loading set by inner ring axle
On, but this loaded load radially, is the end-play in order to eliminate rolling bearing, when reaching to reduce bearing rotary
The purpose of vibration, the radial loaded power that therefore kind of bearings testing machine can bear is the least.When radial load is more than specified
Load value time necessarily cause rotate imbalance, cause this type of testing machine can only be suitable for test such as aero-engine etc.
The bearing of indivedual operating modes.
On the other hand, as axially loaded in carried out, axial application of force acts directly on motor by test bearing outer ring and turns
Son, and rotor can not bear the axial thrust of up to a hundred thousand Ns, therefore can not realize axially loaded so that this type of
Method can not be simulated the lateral deviation of Inspection Aircraft Wheels and load.
Therefore, said method can only realize the driving rotating housing washer simply, and does not possess bearing
Test capability, the especially test to the Inspection Aircraft Wheels bearing of high rotating speed high load capacity operating mode are the most too far behind to catch up.
Aircraft is in moment of landing, and airplane wheel contacts to earth to wheel and rotates to the linear velocity equal with air speed, this speed
Degree rising edge lasts less than 200ms.If the acceleration that bearing tester needs simulated aircraft landing moment wheel bearing rotates
Operating mode, this require bearing tester within 200ms by wheel bearing speed drive to rated speed when taking off,
Load is loaded onto rated load simultaneously, and can simulated aircraft impact acceleration to wheel bearing when landing.Substantial load
Loading impact so that the moment of resistance brought by the frictional resistance of wheel bearing is very big, such exacting terms, profit
Directly wheel bearing is driven within 200ms to the highest rotating speed can not be achieved with motor or electro spindle.
Accordingly, it would be desirable to seek additive method to realize the driving to bearing outer ring, to reach Inspection Aircraft Wheels bearing is carried out
The purpose of test.
Along with improving constantly of present generation aircraft performance requirement, the performance of airplane wheel is had higher requirement, wheel
Should have lightweight, bearing capacity is big, the life-span is high, and can bear big shock loading, therefore, the selection to wheel
Bearing is it is also proposed that higher requirement.Wheel bearing, by heavy duty, shock loading and life test results, selects for wheel
With being inexorable trend.
The most domestic test to airplane wheel bearing, is that wheel bearing carries out carrying and rolling life test with wheel,
Selection risk is big, and the test period is long, and the development to wheel adds risk.Further, in the testing machine of relative rolling type,
With the drum of major diameter large inertia replace runway and wheel to rolling, drum as the linear velocity of wheel outer ring, therefore its
Rotating ratio is the diameter ratio of wheel and drum.The diameter of wheel is bigger than the diameter of wheel bearing several times, if used
This type of testing machine carrys out testing machine wheel bearing, need to drive whole wheel, then need a set of huge driving equipment, as need by
Wheel is driven into more than 3000rpm rotating speed, corresponding drum rotating speed the highest, thus the drum to major diameter large inertia
Requirement for dynamic balance the highest, no can not despise in the vibration brought.By upper narration it can be extrapolated that no matter from safety, energy
Considering in consumption or cost, the method the most less has exploitativeness, especially at wheel bearing toward high-speed high-load side
In the present situation of development.
Therefore, the domestic testing machine being specifically designed for airplane wheel bearing is still sheet weakness zone.Now wheel bearing is existed
The exploration of operating state data under the conditions of especially high rotating speed heavy load impact when landing of taking off is extremely urgent.
Summary of the invention
The driving to housing washer rotation can only be realized simply present in solution prior art, and can not expire
The deficiency that foot Inspection Aircraft Wheels bearing test requires, the present invention proposes one makes airplane wheel bearing outer ring temperature of inner ring during rotation solid
Fixed driving means.
The present invention includes motor, clutch, bearing block, drum, wheel shaft and shaft coupling.Wherein: clutch is arranged on
On the output shaft of motor.Wheel shaft is arranged on 2 bearing blocks, and makes one end of this wheel shaft by shaft coupling and clutch
The Flange joint of one end.Drum is arranged on described wheel shaft by key and between described 2 bearing blocks.Drum
The circumferential surface frictional fit of external peripheral surface and the rubber wheel being arranged on charger.Described rubber wheel is sleeved on examination
Test on the outer ring of bearing.Brake disc is fixed on an end face of rubber wheel by flange, and makes the braking of this brake disc
Video disc is positioned in the braking intermediate plate of brake.What the upper end of described brake was fixed in charger adds carried base board following table
Face.
Described test bearing is identical with the maximum speed of rubber wheel.A diameter of 248mm of rubber wheel；Drum a diameter of
1200mm.Rubber wheel and drum are to rolling, therefore the linear velocity of rubber wheel is identical with the linear velocity of drum.
The operation principle of the present invention is as follows:
During test, test bearing is the wheel bearing of one group of two set, is symmetrically arranged in rubber wheel.
Testing machine is when carrying out airplane wheel bearing dynamic load test, it is possible to realize simulated aircraft on sliding state opportunity
The work condition state of wheel bearing.The rubber wheel that will be equipped with test bearing is arranged on the loading head of loading system, starts electronic
Machine drives drum to rotate, start-up loading system, promotes loading head to move forward, and makes rubber wheel press to the drum rotated.
After rubber wheel is pressed on drum, passively rotate under the effect of frictional force, lifting motor rotating speed, make wheel bearing rotary
Reach rated speed.Now utilize hydraulic loading system that bearing is implemented Impulsive load, transient rise hydraulic cylinder input pressure
Power, makes rubber wheel press to the drum of high speed rotating；During Impulsive load, when being impacted by load transducer record in load
The situation of liter, load value speed will rise to rated load value at about 0.2s from null value.Meanwhile, rubber wheel is pressed on drum
After, passively rotating under the effect of frictional force, test bearing rotating speed will reach rated speed within 200ms.
The mode that relative rolling type passive matrix wheel bearing outer ring of the present invention rotates, transmission rotating ratio is drum external diameter
With the ratio of rubber wheel external diameter, the external diameter of the small-sized rubber wheel for fitting machine wheel bearing of the present invention is much smaller than reality
Wheel external diameter, this makes under the equal speed conditions of drum comparable size, and wheel bearing can obtain more high rotation speed,
It is possibly realized for developing more high-revolving wheel bearing.
This driving means accompanies examination bearing without being equipped with for test bearing, has broken conventional bearings driving means and has been accompanied examination bearing
The limitation that maximum speed limits.Eliminate and accompany examination bearing so that examination axle is no longer accompanied in the measurement to test bearing temperature
The interference held, provides unfailing test data for bearing test.
The driving means that the airplane wheel bearing outer ring temperature of inner ring during rotation of the present invention is fixing, can not only provide for bearing tester
Power, makes test bearing rotate by the rotating speed of regulation, and can bear dynamic and static load and the scragging of bearing
Load, it is big to bear load, and rotating speed is high, can be applicable to the driving means part of numerous domestic bearing tester, like flying
Machine engine bearing testing machine etc..
The present invention be a kind of can the testing equipment of the simulated aircraft actually used operating mode of wheel bearing, Inspection Aircraft Wheels bearing class is tried
The machine of testing can reach on the basis of the present invention simulated aircraft taking off, high speed slide, landing time impact moment, lateral deviation
In land and stopped process, the applying working condition state such as wheel shaft strength operating mode, experimental condition, can reflect wheel all sidedly
The operating mode of bearing, to assess accurately its intensity, life-span, for research high rotating speed, the Inspection Aircraft Wheels of heavy load
Bearing provides believable test basis, can effectively shorten its lead time.
Accompanying drawing explanation
Fig. 1: present configuration schematic diagram.
The structural representation of Fig. 2: drum, wherein, 2a is front view, and 2b is side view.
The structural representation of Fig. 3: rubber wheel, wherein, 3a is side view, and 3b is front view.
Fig. 4: the present invention coordinates schematic diagram with test bearing.
In figure:
1. triphase AC variable frequency speed-regulating asynchronous machine；2. clutch；3. bearing block；4. drum；5. wheel shaft；6. rubber
Wheel；7.U shape loading head；8. load axle；9. brake；10. axle sleeve；11. brake discs；12. test bearings；13.
Round nut；14. shaft couplings；15. rubber layers；16. steel rings.
Detailed description of the invention
The present embodiment is a kind of driving means for certain airplane wheel bearing load shock machine, described driving means
By relative rolling type rotating manner passive matrix wheel bearing.The present embodiment include triphase AC variable frequency speed-regulating asynchronous machine 1,
Clutch 2, bearing block 3, drum 4, wheel shaft 5 rubber wheel 6, brake 9 and shaft coupling 14.Described motor 1 is adopted
Use triphase AC variable frequency speed-regulating asynchronous machine.
In the present embodiment, clutch 2 is arranged on the output shaft of triphase AC variable frequency speed-regulating asynchronous machine 1.Wheel shaft 5
It is arranged on 2 bearing blocks, and makes the one end Flange joint by shaft coupling 14 with clutch 2 one end of this wheel shaft.
Drum 4 is arranged on described wheel shaft 5 and between described 2 bearing blocks by key.The external peripheral surface of drum 4
Circumferential surface frictional fit with the rubber wheel 6 being arranged on charger.Described rubber wheel 6 is sleeved on test bearing
Outer ring on.Brake disc 11 is fixed on an end face of rubber wheel 6 by flange, and makes the system of this brake disc 11
Dynamic video disc is positioned in the braking intermediate plate of brake 9.The loading base that the upper end of described brake 9 is fixed in charger
Plate lower surface.
Described drum 4 is made up of 42CrMo forging, meridosternous structure, a diameter of 1200mm, wide 340mm, deadweight
9KN, along centrage rotary inertia 198Kg..
Described clutch 2 uses electromagnetism dead electricity clutch DLM2-400, response time 0.5s, rated power square
4000Nm, it is allowed to maximum speed 1600rpm.
Described wheel shaft 5 material uses 34CrMo1A, and conduct oneself with dignity 3.5KN, along centrage rotary inertia 62Kg..Wheel
Axle need to carry out ultrasonic examination inspection, confirms its integrity degree.
Modulation treatment hind axle is longitudinal: tensile strength sigma b >=700MPa, yield strength σ s >=600MPa
Impact absorbing energy ak >=60N/c, elongation after fracture δ >=15%
Contraction percentage of area ψ >=40%
The carried base board that adds of U-shaped loading head 7 is fixedly mounted on the portable plate lower surface of charger.Load the two ends of axle 8
It is separately fixed on two loading arms of U-shaped loading head 7.Test bearing 12 is arranged on the middle part loading axle 8.Rubber
Wheel 6 is sleeved on the outer ring of described test bearing.Brake disc 11 is sleeved on loading axle, and the method in this brake disc
A blue end face with rubber wheel 6 is fixed and is connected.The braking video disc of described brake disc is positioned at the braking intermediate plate of brake 9
In.The upper end of described brake 9 is positioned at loading head and is fixed on the lower surface adding carried base board.
The profile of described U-shaped loading head 7 is rectangle, by adding carried base board and two loading arms form.Two loading arms pair
Claim ground to be positioned at the both sides of described loading base lower surface length direction, form " u "-shaped at described loading head lower surface.Respectively
There is the installing hole with axle sleeve the lower end of loading arm, and the two ends loading axle are respectively and fixedly installed in described axle sleeve.
Described rubber wheel 6 is sleeve-shaped, is made up of steel ring 16 and rubber layer 15.The aperture at described steel ring 16 two ends
Identical with the external diameter of test bearing 12, and the location shaft shoulder of test bearing 12 is had at the endoporus two ends of steel ring 16.Steel ring
The end face of 16 shell one end is even is furnished with four brake disc installing holes.The outer surface of steel ring 16 is coated with rubber layer 15.
Described steel ring 16, material uses 40Cr.Described rubber layer 15 material is hydrogenated nitrile-butadiene rubber, and its hardness is
90 ± 2, breaking strength >=20MPa, elongation at break >=200%, adhesion of rubber to metal intensity >=15MPa.
Described rubber wheel need to do dynamic balance running, eliminates and beats at a high speed.
Described brake disc 11 is sleeve-shaped.The internal diameter of this brake disc is more than the external diameter loading axle.One end of brake disc has
The flange coordinated with the steel ring on rubber wheel, the other end of brake disc has the braking video disc of radially protruding.This braking video disc
External diameter need can with the two of brake 9 braking intermediate plate coordinate.The thickness of described braking video disc is less than said two system
Spacing between dynamic intermediate plate.
Described brake 9 uses the disc brake of routine.
In enforcement, test bearing 12 1 group two set is installed in rubber wheel 6, and is securedly mounted to by round nut 13
Load on axle 8.Load axle 8 to be installed on U-shaped loading head 7 by the axle sleeve at two ends.
In the present embodiment, test bearing maximum speed is 7100r/min, and a diameter of 248mm of rubber wheel, drum is a diameter of
1200mm, rubber wheel is identical with the drum linear velocity to rolling spin when turning: 248 × 7100=1200 × V, draws drum rotating speed
V=1468r/min, i.e. motor speed 1468r/min.Triphase AC variable frequency speed-regulating asynchronous machine 1 select power 630KW,
Rotating speed 1490rpm four-pole motor.
In the present embodiment, simulating the heavy load impact of this type wheel bearing, during dynamic load, bearing rotating speed is
7100rpm, radial load is 275KN.
Xi'an Aviation Brake Technology Co., Ltd. discloses one in the innovation and creation of Application No. 2014102708950
The charger of bearing tester.The charger of the present embodiment and described bearing tester with the use of.
Described charger includes hydraulic cylinder, fixed plate, load transducer, column, portable plate, rubber wheel, adds
Carrier head, loading axle, brake and brake disc.Wherein:
Described portable plate lower surface has guide-track groove, and the carried base board that adds of loading head 7 is arranged in this guide-track groove.Loading head 7
The geometric center of guide-track groove being positioned at described portable plate lower surface overlaps with the geometric center of portable plate, and this guide-track groove
Length direction consistent with the length direction of loading head 7.The bottom surface of the length direction of described guide-track groove is arc.
The radius of curvature of this arcwall face is 1800mm.On the two side of this guide-track groove, symmetry is evenly equipped with for fixing loading head
Screwed hole.
The upper surface of described loading head 7 is cambered surface, and the arcuate groove bottom surface of this cambered surface and described guide-track groove.Two
Individual loading arm is symmetrically located at the both sides of described loading base lower surface length direction.
During test, simulated aircraft sliding state.Start triphase AC variable frequency speed-regulating asynchronous machine 1 by clutch 2,
Shaft coupling 14 drives drum 4 low speed rotation, and charger promotes and is mounted with that the rubber wheel 6 of test bearing 12 presses to low
The drum 4 that speed rotates, rubber wheel 6 passively rotates under the effect of frictional force between drum 4, and Vertical loading realizes
The radial loaded of bearing, lift three-phase ac variable frequency speed regulation asynchronous machine 1 rotating speed drives drum 4 rotary speed the most again,
I.e. lifting test bearing 12 rotary speed is to specified rotary speed.
Claims (1)
1. one kind makes the driving means that airplane wheel bearing outer ring temperature of inner ring during rotation is fixing, it is characterised in that include motor, clutch
Device, bearing block, drum, wheel shaft and shaft coupling；Wherein: clutch is arranged on the output shaft of motor；Wheel shaft is pacified
It is contained on 2 bearing blocks, and makes the one end Flange joint by shaft coupling with clutch one end of this wheel shaft；Drum
It is arranged on described wheel shaft by key and between described 2 bearing blocks；The external peripheral surface of drum be arranged on
The circumferential surface frictional fit of the rubber wheel on charger；Described rubber wheel is sleeved on the outer ring of test bearing；
Brake disc is fixed on an end face of rubber wheel by flange, and makes the braking video disc of this brake disc be positioned at brake
Braking intermediate plate in；The loading base lower surface that the upper end of described brake is fixed in charger；Described test
Bearing is identical with the maximum speed of rubber wheel, a diameter of 248mm of rubber wheel；The a diameter of 1200mm of drum；Rubber wheel
With drum to rolling, therefore the linear velocity of rubber wheel is identical with the linear velocity of drum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293088.0A CN104111171B (en) | 2014-06-26 | 2014-06-26 | Drive unit for rotating outer ring and fixing inner ring of airplane wheel bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410293088.0A CN104111171B (en) | 2014-06-26 | 2014-06-26 | Drive unit for rotating outer ring and fixing inner ring of airplane wheel bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104111171A CN104111171A (en) | 2014-10-22 |
| CN104111171B true CN104111171B (en) | 2017-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410293088.0A Active CN104111171B (en) | 2014-06-26 | 2014-06-26 | Drive unit for rotating outer ring and fixing inner ring of airplane wheel bearing |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104344957A (en) * | 2014-10-29 | 2015-02-11 | 西安航空制动科技有限公司 | Dynamic load simulation test method of airplane wheel bearing |
| CN104344958B (en) * | 2014-10-29 | 2016-10-19 | 西安航空制动科技有限公司 | Take off/simulation experiment method of airplane wheel bearing operating mode while ending to take off |
| CN104359675B (en) * | 2014-10-29 | 2017-05-17 | 西安航空制动科技有限公司 | Method for testing load impact loading of aircraft wheel bearings |
| CN106908243B (en) * | 2017-03-07 | 2019-10-29 | 宁波更大集团有限公司 | Bearing outer ring rotary test rig |
| CN109855871B (en) * | 2019-01-03 | 2021-01-22 | 洛阳轴承研究所有限公司 | Needle bearing test equipment |
| WO2021092970A1 (en) * | 2019-11-11 | 2021-05-20 | 清华大学 | Low-temperature large temperature variation joint bearing test platform and measurement and observation method |
| CN112027109A (en) * | 2020-09-02 | 2020-12-04 | 中国航空工业集团公司沈阳飞机设计研究所 | Wheel speed simulation device and anti-skid brake control test system thereof |
| CN114659788B (en) * | 2022-05-23 | 2022-08-09 | 哈尔滨科锐同创机模制造有限公司 | Friction testing device of bearing tester |
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