CN104236881A - Rigid damping testing device - Google Patents
Rigid damping testing device Download PDFInfo
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- CN104236881A CN104236881A CN201410424905.1A CN201410424905A CN104236881A CN 104236881 A CN104236881 A CN 104236881A CN 201410424905 A CN201410424905 A CN 201410424905A CN 104236881 A CN104236881 A CN 104236881A
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- guide pillar
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- test unit
- damping test
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Abstract
The invention provides a rigid damping testing device, and belongs to a testing device in the technical field of helicopter dynamics. The rigid damping testing device is used for the helicopter undercarriage rigid damping test. The rigid damping testing device comprises a testing platform rack (1), limiting mechanisms (3), guide columns (4), a clamp installation flat plate (5), a vibration table (6), displacement sensors (7) and guide column beams (9). By means of the rigid damping testing device, in the helicopter undercarriage rigid damping test, undercarriage buffering supporting columns are forced to vibrate so that the rigid damping can be measured, and the rigid damping testing device has the advantages of being high in testing efficiency and control accuracy, convenient to install, stable and reliable in running and the like.
Description
Technical field
The present invention relates to the test unit in Helicopter Dynamics experimental technique field, be mainly used in the stiffness and damping test of helicopter landing gear.
Background technology
Helicopter when ground handling because of being coupled and the autovibration produced between blade lagging with body vibration, ground resonance specific to helicopter that Here it is.Ground resonance is a kind of Self-Excited Vibration Problem jeopardizing Helicopter Safety.In order to ensure the safety of helicopter ground run and flight, must conscientiously get rid of the possibility that " ground resonance " occurs helicopter.Clear stipulaties in American army mark ADS-27: helicopter clearly must carry out test of Vibration to the helicopter be parked on the undercarriage of ground support before ground driving first, before ground driving first, ground resonance analysis must be upgraded by this test findings, and judge the security driven in ground accordingly.The data that starting point of this regulation namely wants the rigidity of clear and definite undercarriage and damping etc. crucial, because the complicacy of influence factor and the strong nonlinearity of itself are difficult to by reliably determining by drawing, and must carry out test to determine to the material object produced.Before full machine general assembly, its stiffness and damping test is carried out to the impact damper of undercarriage and wheel.
Avoiding helicopter to produce one of main path of ground resonance is rigidity and the damping of suitably selecting undercarriage, and the stiffness and damping of undercarriage only has the means acquisition by test, test figure analyzes the important evidence of Model Helicopter Ground Resonance test, is the necessary condition that new machine development " ground resonance " of helicopter is analyzed.Need to carry out before installation and technical appraisement helicopter main tail undercarriage impact damper vertical stiffness damping test, main the wheel vertical stiffness damping test etc. of tail undercarriage.So carrying out stiffness and damping test to the impact damper of helicopter landing gear and wheel is the only resource obtaining data, " ground resonance " conclusion for helicopter vertical take off and landing state provides science, reliably data supporting.
Summary of the invention
The object of the invention is: provide a kind of test unit, for the test of helicopter landing gear stiffness and damping, " ground resonance " conclusion for helicopter vertical take off and landing state provides science, reliably data supporting.
Technical scheme of the present invention is:
A kind of stiffness and damping test unit, it is characterized in that, comprise bed stand 1, position-limit mechanism 3, guide pillar 4, fixture install dull and stereotyped 5, shaking table 6, displacement transducer 7 and guide pillar crossbeam 9, four pillars outside bed stand 1 are parallel to each other between two, and perpendicular to the base plate of bed stand 1, inner side is parallel to each other between two by four and cylindrical guides 4 perpendicular to base plate forms, and guide pillar 4 is Height Adjustable; Position-limit mechanism 3 is Snap ring structure, locates for the physical space machinery installed fixture between dull and stereotyped 5 and shaking table 6; Fixture is installed dull and stereotyped 5 and is had four through holes, concentric with four guide pillars 4, and fixture is installed dull and stereotyped 5 and had T-slot; Guide pillar 4 relies on guide pillar crossbeam 9 to connect between any two, the integrally-built Rigidity and strength of reinforced frame; Fixture is installed dull and stereotyped 5 and is inserted in four guide pillars 4, is fixed on the top of guide pillar 4; Shaking table 6 is arranged on the base plate of bed stand 1, testpieces is fixed on shaking table 6 by fixture and fixture is installed between dull and stereotyped 5, and regulated the height of guide pillar 4 by displacement transducer 7, side cover plate 10 forms for covering device inside, prevent from dust from entering, making it attractive in appearance.
Hard chrome plating process is carried out on the surface of described cylindrical guides 4.
Bed stand 1 is the bearing frame be welded on by square steel on one flat plate, is fixed on ground by foot bolt.
Described hydraulic actuator 2 is made up of pressurized strut, servo-valve and piston rod.
Described shaking table 6 is hydraulic vibration gen, and hydraulic vibration gen upper table surface has T-slot, is convenient to the installation of undercarriage, and shaking table 6 is its oil inlet pipe by the 3rd oil pipe 22, and the 4th oil pipe 23 is its flowline, and oil well pump 24 provides extra power for whole system.
Described guide pillar support 8 is for the guiding moved up and down of fixture mounting platform 5, and guide pillar rack beam 9 is for strengthening the load-bearing capacity of bed stand 1.
Piston rod above described hydraulic actuator 2 is connected by outer-hexagonal flange nut 17 with fixture mounting platform 5, and spacing screw mandrel 18 is for mechanical protection.
Described guide pillar 4 is carried out installation with fixture mounting platform 5 linked together by guide pillar gland 14, guide pillar guide pin bushing 15, guide pillar joint flange 16.
Described hydraulic actuator 2 is controlled by hydraulic actuator operation valve 20, first oil pipe 19 is its oil inlet pipe, the second oil pipe 21 is flowline, is connected and fixed between hydraulic actuator 2 and fixture mounting platform 5 by hexagonal nut 11, packing ring 12, hydraulic actuator coupling bolt 13.
Described control sensor 7 is stay wire displacement sensor.
Position-limit mechanism 3 of the present invention is for locating the physical space machinery between fixture mounting platform 5 and shaking table 6.Hydraulic actuator be arranged on test platform stand 1 base plate on, for the physical space between alignment jig mounting platform 5 and shaking table 6.Testpieces two ends are separately fixed between shaking table 6 and fixture mounting platform 5, and control system regulates hydraulic actuator 2 by controlling sensor 7.
High pressure liquid force feed in hydraulic power pumping plant flows into hydraulic actuator 2 by the first oil pipe 19, the piston rod of hydraulic actuator operation valve 20 hydraulic control actuator, by controlling the spacing of sensor 7 alignment jig mounting platform 5 and shaking table 6, regulate that to carry out machinery apart from spacing screw mandrel 18 locked, testpieces two ends are arranged on fixture respectively and install on stationary platform 5 table top and shaking table 6 table top, power system promotes shaking table 6 by the 3rd oil pipe 22 and works, the control signal that control system sends shaking table 6 work comprises frequency and amplitude, forced vibration is carried out to test, find out the damping of testpieces under certain frequency and amplitude.
The invention has the beneficial effects as follows:
Stiffness and damping test unit of the present invention, have that stiffness by itself is large, dynamic perfromance good, hydraulic vibration gen thrust be stable, reliable, can test the stiffness and damping of undercarriage buffer, wheel and damper, ensure the node of new model development task, substantially increase test efficiency, shorten the test period simultaneously and reduce experimentation cost.Device have employed intelligent sensor, hyperchannel servo coordinated control system, exclusive data Treatment Analysis software, and its every technical parameter is all better than domestic and international same device; Device has certain universal and extensibility, can meet the demand of following Project R&D.
Accompanying drawing explanation
Fig. 1 is stiffness and damping test unit structural drawing
Fig. 2 is stiffness and damping test unit front elevation
Fig. 3 is stiffness and damping test unit left view
Fig. 4 is stiffness and damping test unit A-A cut-open view
Fig. 5 is stiffness and damping test unit B-B cut-open view
Fig. 6 is stiffness and damping test unit C-C cut-open view
Fig. 7 is stiffness and damping test unit D-D cut-open view
Fig. 8 is stiffness and damping test unit E-E cut-open view.
Embodiment
In order to better the present invention is described, below in conjunction with Figure of description, the present invention is described in further detail.
A kind of stiffness and damping test unit, it is characterized in that, comprise bed stand 1, position-limit mechanism 3, guide pillar 4, fixture install dull and stereotyped 5, shaking table 6, displacement transducer 7 and guide pillar crossbeam 9, four pillars outside bed stand 1 are parallel to each other between two, and perpendicular to the base plate of bed stand 1, inner side is parallel to each other between two by four and cylindrical guides 4 perpendicular to base plate forms, and guide pillar 4 is Height Adjustable; Position-limit mechanism 3 is Snap ring structure, locates for the physical space machinery installed fixture between dull and stereotyped 5 and shaking table 6; Fixture is installed dull and stereotyped 5 and is had four through holes, concentric with four guide pillars 4, and fixture is installed dull and stereotyped 5 and had T-slot; Guide pillar 4 relies on guide pillar crossbeam 9 to connect between any two, the integrally-built Rigidity and strength of reinforced frame; Fixture is installed dull and stereotyped 5 and is inserted in four guide pillars 4, is fixed on the top of guide pillar 4; Shaking table 6 is arranged on the base plate of bed stand 1, and testpieces is fixed on shaking table 6 by fixture and fixture is installed between dull and stereotyped 5, is regulated the height of guide pillar 4 by displacement transducer 7.
Hard chrome plating process is carried out on the surface of described cylindrical guides 4.
Bed stand 1 is the bearing frame be welded on by square steel on one flat plate, is fixed on ground by foot bolt.
Described hydraulic actuator 2 is made up of pressurized strut, servo-valve and piston rod.
Described shaking table 6 is hydraulic vibration gen, and hydraulic vibration gen upper table surface has T-slot, is convenient to the installation of undercarriage, and shaking table 6 is its oil inlet pipe by the 3rd oil pipe 22, and the 4th oil pipe 23 is its flowline, and oil well pump 24 provides extra power for whole system.6. stiffness and damping test unit according to claim 1, is characterized in that, guide pillar support 8 is for the guiding moved up and down of fixture mounting platform 5, and guide pillar rack beam 9 is for strengthening the load-bearing capacity of bed stand 1.
Piston rod above described hydraulic actuator 2 is connected by outer-hexagonal flange nut 17 with fixture mounting platform 5, and spacing screw mandrel 18 is for mechanical protection.
Described guide pillar 4 is carried out installation with fixture mounting platform 5 linked together by guide pillar gland 14, guide pillar guide pin bushing 15, guide pillar joint flange 16.
Described hydraulic actuator 2 is controlled by hydraulic actuator operation valve 20, first oil pipe 19 is its oil inlet pipe, the second oil pipe 21 is flowline, is connected and fixed between hydraulic actuator 2 and fixture mounting platform 5 by hexagonal nut 11, packing ring 12, hydraulic actuator coupling bolt 13.
Described control sensor 7 is stay wire displacement sensor.
Position-limit mechanism 3 of the present invention is for locating the physical space machinery between fixture mounting platform 5 and shaking table 6.Hydraulic actuator be arranged on test platform stand 1 base plate on, for the physical space between alignment jig mounting platform 5 and shaking table 6.Testpieces two ends are separately fixed between shaking table 6 and fixture mounting platform 5, and control system regulates hydraulic actuator 2 by controlling sensor 7.
High pressure liquid force feed in hydraulic power pumping plant flows into hydraulic actuator 2 by the first oil pipe 19, the piston rod of hydraulic actuator operation valve 20 hydraulic control actuator, by controlling the spacing of sensor 7 alignment jig mounting platform 5 and shaking table 6, regulate that to carry out machinery apart from spacing screw mandrel 18 locked, testpieces two ends are arranged on fixture respectively and install on stationary platform 5 table top and shaking table 6 table top, power system promotes shaking table 6 by the 3rd oil pipe 22 and works, the control signal that control system sends shaking table 6 work comprises frequency and amplitude, forced vibration is carried out to test, find out the damping of testpieces under certain frequency and amplitude.
Claims (10)
1. a stiffness and damping test unit, it is characterized in that, comprise bed stand (1), position-limit mechanism (3), guide pillar (4), fixture are installed dull and stereotyped (5), shaking table (6), displacement transducer (7) and guide pillar crossbeam (9), four pillars in bed stand (1) outside are parallel to each other between two, and perpendicular to the base plate of bed stand (1), inner side is parallel to each other between two by four and cylindrical guides (4) perpendicular to base plate forms, and guide pillar (4) is Height Adjustable; Position-limit mechanism (3) is Snap ring structure, locates for the physical space machinery installed fixture between dull and stereotyped (5) and shaking table (6); Fixture is installed dull and stereotyped (5) and is had four through holes, concentric with four guide pillars (4), and fixture is installed dull and stereotyped (5) and had T-slot; Guide pillar (4) relies on guide pillar crossbeam (9) to connect between any two, the integrally-built Rigidity and strength of reinforced frame; Fixture is installed dull and stereotyped (5) and is inserted in four guide pillars (4), is fixed on the top of guide pillar (4); Shaking table (6) is arranged on the base plate of bed stand (1), testpieces is fixed on shaking table (6) by fixture and fixture is installed between dull and stereotyped (5), is regulated the height of guide pillar (4) by displacement transducer (7).
2. stiffness and damping test unit according to claim 1, is characterized in that, hard chrome plating process is carried out on the surface of described cylindrical guides (4).
3. stiffness and damping test unit according to claim 1, is characterized in that, described bed stand (1) is the bearing frame be welded on by square steel on one flat plate, is fixed on ground by foot bolt.
4. stiffness and damping test unit according to claim 1, is characterized in that, described hydraulic actuator (2) is made up of pressurized strut, servo-valve and piston rod.
5. stiffness and damping test unit according to claim 1, it is characterized in that, described shaking table (6) is hydraulic vibration gen, hydraulic vibration gen upper table surface has T-slot, be convenient to the installation of undercarriage, shaking table (6) is its oil inlet pipe by the 3rd oil pipe (22), and the 4th oil pipe (23) is its flowline, and oil well pump (24) provides extra power for whole system.
6. stiffness and damping test unit according to claim 1, it is characterized in that, guide pillar support (8) is for the guiding moved up and down of fixture mounting platform (5), and guide pillar rack beam (9) is for strengthening the load-bearing capacity of bed stand (1).
7. stiffness and damping test unit according to claim 1; it is characterized in that; piston rod above described hydraulic actuator (2) is connected by outer-hexagonal flange nut (17) with fixture mounting platform (5), and spacing screw mandrel (18) is for mechanical protection.
8. stiffness and damping test unit according to claim 1, it is characterized in that, described guide pillar (4) and fixture mounting platform (5) are carried out installation linked together by guide pillar gland (14), guide pillar guide pin bushing (15), guide pillar joint flanges (16).
9. stiffness and damping test unit according to claim 1, it is characterized in that, described hydraulic actuator (2) is controlled by hydraulic actuator operation valve (20), first oil pipe (19) is its oil inlet pipe, the second oil pipe (21) is flowline, is connected and fixed between hydraulic actuator (2) and fixture mounting platform (5) by hexagonal nut (11), packing ring (12), hydraulic actuator coupling bolt (13).
10. stiffness and damping test unit according to claim 1, is characterized in that, described control sensor (7) is stay wire displacement sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424905.1A CN104236881A (en) | 2014-08-26 | 2014-08-26 | Rigid damping testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410424905.1A CN104236881A (en) | 2014-08-26 | 2014-08-26 | Rigid damping testing device |
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| CN104236881A true CN104236881A (en) | 2014-12-24 |
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| CN201410424905.1A Pending CN104236881A (en) | 2014-08-26 | 2014-08-26 | Rigid damping testing device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424334A (en) * | 2015-11-06 | 2016-03-23 | 上海发电设备成套设计研究院 | Shaft system torsional vibration damping effect testing device and method employing blade grid structure |
| CN106323572A (en) * | 2015-06-19 | 2017-01-11 | 北京物资学院 | Annular damping parts dynamic characteristic test vibration table device |
| CN108168804A (en) * | 2017-12-01 | 2018-06-15 | 中国直升机设计研究所 | The lateral course stiffness and damping testing stand of helicopter wheel |
| CN108414255A (en) * | 2017-12-07 | 2018-08-17 | 上海航天精密机械研究所 | A kind of push type firing mount separation simulation device |
| CN108910082A (en) * | 2018-06-27 | 2018-11-30 | 中国直升机设计研究所 | A kind of wheel torsion stiffness damping test platform |
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| US4089211A (en) * | 1976-11-01 | 1978-05-16 | United Technologies Corporation | Elastomeric bearing test machine |
| CN102053002A (en) * | 2010-12-09 | 2011-05-11 | 南京航空航天大学 | Drop test bed with speed controllable rotation driving mechanism |
| CN102323027A (en) * | 2011-08-12 | 2012-01-18 | 三一重机有限公司 | Mining self-unloading vehicle oil gas suspension vibration testing stand |
| KR101302346B1 (en) * | 2011-12-23 | 2013-08-30 | 현대위아 주식회사 | Device for testing of endurance of landing gear |
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2014
- 2014-08-26 CN CN201410424905.1A patent/CN104236881A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4089211A (en) * | 1976-11-01 | 1978-05-16 | United Technologies Corporation | Elastomeric bearing test machine |
| CN102053002A (en) * | 2010-12-09 | 2011-05-11 | 南京航空航天大学 | Drop test bed with speed controllable rotation driving mechanism |
| CN102323027A (en) * | 2011-08-12 | 2012-01-18 | 三一重机有限公司 | Mining self-unloading vehicle oil gas suspension vibration testing stand |
| KR101302346B1 (en) * | 2011-12-23 | 2013-08-30 | 현대위아 주식회사 | Device for testing of endurance of landing gear |
Non-Patent Citations (2)
| Title |
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| 吴森: "《结构试验基础》", 31 May 1992, 航空工业出版社 * |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106323572A (en) * | 2015-06-19 | 2017-01-11 | 北京物资学院 | Annular damping parts dynamic characteristic test vibration table device |
| CN106323572B (en) * | 2015-06-19 | 2018-11-09 | 北京物资学院 | A kind of cyclic annular damping part dynamic characteristic test vibration platform apparatus |
| CN105424334A (en) * | 2015-11-06 | 2016-03-23 | 上海发电设备成套设计研究院 | Shaft system torsional vibration damping effect testing device and method employing blade grid structure |
| CN105424334B (en) * | 2015-11-06 | 2018-08-17 | 上海发电设备成套设计研究院 | A kind of test device and method of the shafting torsional oscillation damping effect with cascade structure |
| CN108168804A (en) * | 2017-12-01 | 2018-06-15 | 中国直升机设计研究所 | The lateral course stiffness and damping testing stand of helicopter wheel |
| CN108414255A (en) * | 2017-12-07 | 2018-08-17 | 上海航天精密机械研究所 | A kind of push type firing mount separation simulation device |
| CN108910082A (en) * | 2018-06-27 | 2018-11-30 | 中国直升机设计研究所 | A kind of wheel torsion stiffness damping test platform |
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Application publication date: 20141224 |
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