CN102072804B - High-accuracy airplane wheel pre-rotating mechanism for drop test of airplane landing gear - Google Patents
High-accuracy airplane wheel pre-rotating mechanism for drop test of airplane landing gear Download PDFInfo
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- CN102072804B CN102072804B CN2010105978722A CN201010597872A CN102072804B CN 102072804 B CN102072804 B CN 102072804B CN 2010105978722 A CN2010105978722 A CN 2010105978722A CN 201010597872 A CN201010597872 A CN 201010597872A CN 102072804 B CN102072804 B CN 102072804B
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- undercarriage
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- 238000012360 testing method Methods 0.000 title claims abstract description 34
- 230000005540 biological transmission Effects 0.000 claims abstract description 3
- 238000000034 method Methods 0.000 description 11
- 230000003028 elevating effect Effects 0.000 description 3
- 238000004088 simulation Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 235000014121 butter Nutrition 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009863 impact test Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
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Abstract
The invention discloses a high-accuracy airplane wheel pre-rotating mechanism for a drop test of an airplane landing gear. The mechanism comprises a hanging basket and a landing gear, wherein the landing gear is fixed at the lower end of the hanging basket; the lower end of the hanging basket is provided with a swing frame; the upper end of the swing frame is rotationally connected with the hanging basket; the lower end of the swing frame is provided with a friction wheel; the swing frame is provided with a motor; an output shaft of the motor is in transmission connection with the friction wheel; a first positioning device for positioning the swing frame at a first position is arranged between the swing frame and the landing gear; and at the first position, the friction wheel is in close contact with an airplane wheel of the landing gear and drives the airplane wheel to rotate. The mechanism has a simple and compact structure, stable performance and high accuracy, and is convenient to operate.
Description
Technical field
The invention belongs to one type of test unit, can be applicable to undercarriage drop-test and tire test.
Technical background
Undercarriage is the important load parts of aircraft; A kind of design demand of novel undercarriage is regulated impact damper pad parameter and oilhole size through a series of ground drop-test; To improve undercarriage buffering efficient, also can check the structural strength of undercarriage and rigidity to meet design requirement through test.Real motion process of undercarriage and force-bearing situation when undercarriage ground drop-test needs simulated aircraft to land, wherein very important one is the simulation of aircraft horizontal landing speed.The method that undercarriage is landinged impact test has two kinds; A kind of is to build high-speed track delivery scooter on the ground; The horizontal velocity of this test unit when not only accurately simulated aircraft lands; Other motion processes and force-bearing situation when accurately simulated aircraft lands are comparatively desirable aircraft landing ground-test plants.But also there is inevitable shortcoming in this equipment, and its construction place that needs is very big, technological very complicated, and Installation and Debugging are difficulty very, makes experimentation cost significantly improve.The another kind of drop-test method of undercarriage is carried out on the column testing table; The undercarriage of using this method simulation is basic near reality at landing motion process and force-bearing situation; And a kind of shortcoming of method before having overcome, so in the field of business being used widely.When on the column testing table, carrying out landing gear drop test; Aircraft horizontal landing speed adopts the wheel rotating speed to simulate; After promptly through wheel prerotation mechanism wheel being inverted to its edge tangential velocity in advance and reaching aircraft horizontal landing speed before the test, throw in the falling bodies system that comprises hanging basket again.Wheel prerotation mechanism commonly used adopts friction pulley prerotation method, promptly on a crossbeam, arranges a friction pulley, and crossbeam is supported by hydraulic actuator, and hydraulic actuator is controlled the follow-up and the withdrawal of crossbeam simultaneously, bumps with the hanging basket that falls to prevent wheel prerotation mechanism.Use this mechanism when carrying out landing gear drop test, at first friction pulley follow-up drives the wheel rotation through friction; After the standby wheel speed reaches predetermined speed; Friction pulley drives at hydraulic actuator and removes home next time, throws in the falling bodies system then, and the wheel colliding surface is accomplished test.There is the scarce limit that is difficult to avoid in this friction pulley prerotation method, and it is poor at first to withdraw wheel tire colliding surface life period to from the friction samsara, causes the loss of wheel rotating speed more, and the rotating speed when being difficult to accurately to control the wheel tire and contacting to earth influences accuracy of experimental results.Secondly this method needs a cover hydraulic drive mechanism to ensure the follow-up of friction pulley and returns and remove, and experimentation cost is than higher, and the follow-up of friction pulley and return to remove easily and interfere with other test parts in addition is therefore higher to testing miscellaneous part orientation arrangement requirement.
Summary of the invention
The object of the invention: the present invention is simple in structure, stable performance, easy to use, equipment cost is low; Successfully solved because of the wheel tire that causes because of wheel commentaries on classics degree loss in the drop-test of the undercarriage ground rotating speed that contacts to earth and be difficult to the accurately difficult problem of control; Accurately the horizontal landing speed of simulated aircraft has improved test accuracy.
Technical scheme of the present invention: a kind of undercarriage drop-test high precision wheel prerotation mechanism; Comprise hanging basket; Undercarriage, described undercarriage is fixed on the lower end of described hanging basket, also is provided with a rocker in the lower end of described hanging basket; The upper end of this rocker and described hanging basket are rotationally connected; Be provided with a friction pulley in the lower end of described rocker, on this rocker, also be provided with a motor, the output shaft of described motor and described friction pulley are in transmission connection; Between described rocker and undercarriage, be provided with described rocker be positioned at primary importance first locating device, described friction pulley closely contacts and drives this wheel with the wheel of described undercarriage and rotates when this primary importance.
Described first locating device comprises fixed head, connection strap and electromagnetic lock, and described fixed head is fixed on described hanging basket lower end, and described connection strap one end is connected with fixed head, and the other end connects described electromagnetic lock.
The opposite side of described rocker be provided with described rocker be positioned at the second place second locating device; This second locating device comprises locating support, magnet and spring; Described locating support is fixed on the lower end of described hanging basket; One end of described spring is fixed on the locating support, and the other end of spring is connected with described rocker, and described magnet is fixed on the locating support.
A kind of undercarriage drop-test high precision wheel prerotation mechanism comprises hanging basket, bearing, base, pin, motor pulley, spring, locating support, magnet, V-belt, friction pulley belt wheel, friction pulley, wheel, undercarriage, undercarriage anchor clamps, fixed head, motor, connection strap, rocker, electromagnetic lock, elevating mechanism, test-bed, impact platform, travel switch and slideway.Said rocker is installed in through pin on the base that is arranged on the hanging basket base plate, and rocker can be made simple harmonic motion around pin, and motor and friction pulley are installed on the rocker, and the motor belt wheel links to each other with the coaxial belt wheel of friction pulley together through V-belt.Rocker is arranged an electromagnetic lock near a side of undercarriage; Lock rocker through electromagnetic lock during on-test; Guarantee that friction pulley and wheel keep suitable snap-in force, said locating support is installed on the hanging basket base plate, and both ends of the spring connects rocker and locating support respectively; And still kept extended state at rocker by magnet attracts location rear spring, have certain tightening force.Said friction pulley wheel hub is a steel design, and rubber ring of outer snare guarantees enough friction factor.
Beneficial effect of the present invention: 1, simple in structure, easy to use, stable performance, equipment cost is low.2, solve in the drop-test of undercarriage ground the wheel that causes because of the loss of the wheel commentaries on classics degree rotating speed that contacts to earth and be difficult to the accurately difficult problem of control, improved the simulation precision of aircraft horizontal landing speed.3, this device is widely used, and is applicable to the undercarriage drop-test of dissimilar different models.
Description of drawings:
Fig. 1 column undercarriage drop-test synoptic diagram.
Fig. 2 undercarriage is connected front view with hanging basket.
Fig. 3 undercarriage is connected side view with hanging basket.
Fig. 4 undercarriage wheel colliding surface, rocker reclaim the location synoptic diagram.
Label title among the figure: 1, hanging basket, 2, bearing, 3, base, 4, pin, 5, motor pulley, 6, spring; 7, locating support, 8, magnet, 9, V-belt, 10, the friction pulley belt wheel, 11, friction pulley, 12, wheel; 13, undercarriage, 14, the undercarriage anchor clamps, 15, fixed head, 16, motor, 17, connection strap, 18, rocker; 19, electromagnetic lock, 20, elevating mechanism, 21, test-bed, 22, impact platform, 23, travel switch, 24, slideway.
Embodiment:
The present invention is an a kind of undercarriage drop-test high precision wheel prerotation mechanism, comprises hanging basket 1, bearing 2, base 3, pin 4, motor pulley 5, spring 6, locating support 7, magnet 8, V-belt 9, friction pulley belt wheel 10, friction pulley 11, wheel 12, undercarriage 13, undercarriage anchor clamps 14, fixed head 15, motor 16, connection strap 17, rocker 18, electromagnetic lock 19, elevating mechanism 20, test-bed 21, impact platform 22, travel switch 23, slideway 24.Wherein base, locating support and bearing are installed in respectively on the hanging basket base plate, at the terminal magnet of installing of locating support.Rocker is connected with base through pin, and rocker can be done free simple harmonic motion around pin, during test on pinning coating butter to reduce friction.Motor and friction pulley are installed on the rocker, and friction pulley is connected with rocker through bearing, and friction pulley is free to rotate.The motor wheel passes through V-belt and links to each other with the friction pulley belt wheel.Travel switch is installed on the slideway, and travel switch is controlled the break-make of motor and electromagnetic lock simultaneously.Electromagnetic lock mechanism is installed in the side of rocker near undercarriage, constitutes first locating device with connection strap, the terminal arrangement of magnets of locating support; Constitute second locating device with support and spring, be used for putting at rocker and attract rocker when the second place is locating support, both ends of the spring connects rocker and locating support respectively; Be used to spur rocker to away from undercarriage one side oscillation; And put to locating support at rocker, spring still is in extended state, keeps certain tightening force.The electromagnetic lock locked rocker of switching on during on-test; Make friction pulley contact and keep suitable snap-in force with the undercarriage wheel; The motor energising drives friction wheel from rotation, and friction pulley drives the wheel rotation through friction, after the standby wheel speed reaches predetermined speed; Throw in hanging basket, hanging basket along slideway landing to the wheel tire colliding surface in the test-bed obtain test figure.The hanging basket touching is arranged in the travel switch on the slideway in the time of wheel tire colliding surface, and electromagnetic lock and motor cut off the power supply simultaneously, and electromagnetic lock is opened; Motor stops operating, and rocker rapid backswing under deadweight and spring tension effect is locked on the locating support under magnetic pull and spring tension effect; Friction pulley is in away from the wheel position; Do not interfere with the motion that the undercarriage wheel hits behind the ground, simultaneously because friction pulley lowest surfaces and ground maintenance certain distance, so friction pulley can not contact to earth yet.This method is the not loss of wheel rotating speed in process of the test, has guaranteed the accuracy of aircraft horizontal landing velocity simulate in the drop-test of undercarriage ground, and this apparatus structure is simple simultaneously; Dependable performance; Easy to operate, be widely used, be applicable to the undercarriage of dissimilar different models.
Claims (1)
1. undercarriage drop-test high precision wheel prerotation mechanism; Comprise hanging basket (1); Undercarriage (13), described undercarriage (13) is fixed on the lower end of described hanging basket (1), it is characterized in that: also be provided with a rocker (18) in the lower end of described hanging basket (1); Upper end of this rocker (18) and described hanging basket (1) are rotationally connected; Be provided with a friction pulley (11) in the lower end of described rocker (18), on this rocker (18), also be provided with a motor (16), the output shaft of described motor (16) and described friction pulley (11) are in transmission connection; Between described rocker (18) and undercarriage (13), be provided with first locating device that described rocker (18) is positioned at primary importance, described friction pulley (11) closely contacts and drives this wheel (12) with the wheel (12) of described undercarriage (13) and rotates when this primary importance; Described first locating device comprises fixed head (15), connection strap (17) and electromagnetic lock (19); Described fixed head (15) is fixed on described hanging basket (1) lower end; Described connection strap (17) one ends are connected with fixed head (15), and the other end connects described electromagnetic lock (19); The opposite side of described rocker (18) be provided with described rocker (18) be positioned at the second place second locating device; This second locating device comprises locating support (7), magnet (8) and spring (6); Described locating support (7) is fixed on the lower end of described hanging basket (1); One end of described spring is fixed on the locating support (7), and the other end of spring (6) is connected with described rocker (18), and described magnet (8) is fixed on the locating support (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105978722A CN102072804B (en) | 2010-12-21 | 2010-12-21 | High-accuracy airplane wheel pre-rotating mechanism for drop test of airplane landing gear |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105978722A CN102072804B (en) | 2010-12-21 | 2010-12-21 | High-accuracy airplane wheel pre-rotating mechanism for drop test of airplane landing gear |
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| Publication Number | Publication Date |
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| CN102072804A CN102072804A (en) | 2011-05-25 |
| CN102072804B true CN102072804B (en) | 2012-07-18 |
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| CN2010105978722A Active CN102072804B (en) | 2010-12-21 | 2010-12-21 | High-accuracy airplane wheel pre-rotating mechanism for drop test of airplane landing gear |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104142221B (en) * | 2013-05-10 | 2016-10-19 | 中国直升机设计研究所 | A kind of machine wheel rotating device |
| FR3011531B1 (en) * | 2013-10-04 | 2017-04-21 | Messier Bugatti Dowty | AIRCRAFT IMPELLER EQUIPPED WITH TRAINING MEANS FOR ROTATING WHEELS CARRIED BY THE LICENSOR |
| CN105501435B (en) * | 2014-10-11 | 2017-12-12 | 中国航空工业集团公司西安飞机设计研究所 | It is a kind of to avoid undercarriage from contacting to earth the method for state undue oscillation |
| CN105136420B (en) * | 2015-09-07 | 2018-05-08 | 南京航空航天大学 | Simulation arrester hook hits deck and undercarriage falls the integrated experiment device and test method of shake |
| CN105866570A (en) * | 2016-03-25 | 2016-08-17 | 哈尔滨飞机工业集团有限责任公司 | Helicopter undercarriage system tester |
| CN108100305A (en) * | 2017-12-29 | 2018-06-01 | 南京航空航天大学 | A kind of new landing gear drop test rotary support and experimental method |
| CN108613793B (en) * | 2018-05-04 | 2020-07-28 | 北京理工大学 | Rotatable test device that entries of structure |
| CN109094817B (en) * | 2018-08-29 | 2021-05-14 | 哈尔滨工业大学 | Carrier-based helicopter self-adaptive landing gear landing simulation system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU505924A1 (en) * | 1974-09-02 | 1976-03-05 | Предприятие П/Я А-3395 | Test bench for testing the natural landing gear of the aircraft |
| CN2419590Y (en) * | 1999-10-28 | 2001-02-14 | 北京航空航天大学 | Device for testing range of buffer for undercarriage unit landing shocks |
| CN101000238A (en) * | 2007-01-17 | 2007-07-18 | 北京航空航天大学 | Plane wheel space displacement measuring system of landing gear lowering shock test |
-
2010
- 2010-12-21 CN CN2010105978722A patent/CN102072804B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU505924A1 (en) * | 1974-09-02 | 1976-03-05 | Предприятие П/Я А-3395 | Test bench for testing the natural landing gear of the aircraft |
| CN2419590Y (en) * | 1999-10-28 | 2001-02-14 | 北京航空航天大学 | Device for testing range of buffer for undercarriage unit landing shocks |
| CN101000238A (en) * | 2007-01-17 | 2007-07-18 | 北京航空航天大学 | Plane wheel space displacement measuring system of landing gear lowering shock test |
Non-Patent Citations (1)
| Title |
|---|
| 吴大方等.飞机起落架落震试验中机轮水平冲击载荷测量方法的研究.《机械强度》.2010,第32卷(第5期),第731页右栏至第732页左栏，附图6-7. * |
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| CN102072804A (en) | 2011-05-25 |
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