CN102501970A - Band type damper and preparation method thereof - Google Patents
Band type damper and preparation method thereof Download PDFInfo
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- CN102501970A CN102501970A CN2011103621626A CN201110362162A CN102501970A CN 102501970 A CN102501970 A CN 102501970A CN 2011103621626 A CN2011103621626 A CN 2011103621626A CN 201110362162 A CN201110362162 A CN 201110362162A CN 102501970 A CN102501970 A CN 102501970A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 9
- 229920001971 elastomer Polymers 0.000 claims abstract description 29
- 238000013016 damping Methods 0.000 claims abstract description 14
- 238000003825 pressing Methods 0.000 claims description 73
- 229910052751 metal Inorganic materials 0.000 claims description 40
- 239000002184 metal Substances 0.000 claims description 40
- 238000000465 moulding Methods 0.000 claims description 16
- 239000010935 stainless steel Substances 0.000 claims description 9
- 229910001069 Ti alloy Inorganic materials 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 7
- 238000004073 vulcanization Methods 0.000 claims description 7
- 238000001035 drying Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 229910000881 Cu alloy Inorganic materials 0.000 claims description 3
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 3
- 238000005202 decontamination Methods 0.000 claims description 3
- 230000003588 decontaminative effect Effects 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 2
- 230000006835 compression Effects 0.000 claims 6
- 238000007906 compression Methods 0.000 claims 6
- 239000000853 adhesive Substances 0.000 claims 1
- 230000001070 adhesive effect Effects 0.000 claims 1
- 238000005238 degreasing Methods 0.000 claims 1
- 238000009415 formwork Methods 0.000 claims 1
- 238000005488 sandblasting Methods 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 10
- 238000000034 method Methods 0.000 abstract description 6
- 239000011229 interlayer Substances 0.000 abstract description 4
- 238000012423 maintenance Methods 0.000 abstract description 3
- 230000008569 process Effects 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 description 14
- 238000010168 coupling process Methods 0.000 description 14
- 238000005859 coupling reaction Methods 0.000 description 14
- 239000000463 material Substances 0.000 description 14
- 238000005987 sulfurization reaction Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229920002379 silicone rubber Polymers 0.000 description 2
- 239000004945 silicone rubber Substances 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
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- Buildings Adapted To Withstand Abnormal External Influences (AREA)
- Vibration Dampers (AREA)
Abstract
本发明属于多层剪切粘弹性阻尼器技术领域，涉及对直升机旋翼板式阻尼器的改进。板式阻尼器包括五块刚性板和位于五块刚性板之间的四块夹层板，制备方法是，先制备板式阻尼器夹层板，然后再将五块刚性板和四块夹层板组装成为板式阻尼器。本发明可调节夹层板的橡胶板的厚度或夹层板数量满足不同直升机旋翼系统的刚度和阻尼要求；成型容易，便于加工，组装容易，成本低，安装空间小，具有过载限位能力；维修方便，可目视检查夹层板，失效的夹层板更换方便，而刚性板可长期使用不需更换，节约维修成本；板式阻尼器散热容易，延长使用寿命。
The invention belongs to the technical field of multi-layer shear viscoelastic dampers, and relates to the improvement of helicopter rotor plate dampers. The plate damper includes five rigid plates and four sandwich plates between the five rigid plates. The preparation method is to prepare the plate damper sandwich plate first, and then assemble the five rigid plates and four sandwich plates to form a plate damper device. The invention can adjust the thickness of the rubber plate of the interlayer board or the number of interlayer boards to meet the rigidity and damping requirements of different helicopter rotor systems; it is easy to form, easy to process, easy to assemble, low in cost, small in installation space, and has overload limit ability; easy to maintain. , You can visually inspect the sandwich panel, and the failed sandwich panel is easy to replace, while the rigid panel can be used for a long time without replacement, saving maintenance costs; the plate damper is easy to dissipate heat and prolongs its service life.
Description
Technical field
The invention belongs to multilayer shear viscoelasticity damper technique field, relate to improvement the lifting airscrew band type damper.
Background technology
All adopt shock attenuation unit in the lifting airscrew system; Being damper, is the key function member in the rotor system, can reduce the vibration of helicopter blade; Improve blade life; Avoid the generation of ground resonance and aerial resonance, resonance directly influences the safety of helicopter, can cause helicopter to disintegrate when serious.
U.S. Pat 3842945 proposes two kinds of board-like viscoelastic dampers, and wherein a kind of is to be made up of three layers of rigid metal plate and two-layer damped elasticity body, and its moulding is comparatively complicated with installation.Another kind is to be made up of five rigid metal plate and four layers of damped elasticity body; Two rubber layers are parallel bulk wherein; And two rubber layers of both sides outsides are recessed curved profile to the centre, that is to say that metal sheet and two blocks of inferior intermetallic metal plates all have arc shaped surface the both sides outside.Its shortcoming is: the first, difficulty of processing is big, and tooling cost is high.The second, lateral dimension is big, and five rigid metal plate interconnect through the tie bolt assembly of both sides, have increased lateral dimension, and installing space is increased.Three, do not transship spacing design, potential safety hazard will take place in this under overload situations.Four, because rubber layer and metal sheet pass through the bonding all-in-one-piece of sulfuration, curing forming mold more complicated.
Summary of the invention
The objective of the invention is: propose a kind of can be used for the lifting airscrew system, be convenient to processing, cost is low, installing space is little, have overload spacing ability, moulding is easy to band type damper and preparation method thereof.
Technical scheme of the present invention is: band type damper comprises five rigid plate and four sandwich plates between five rigid plate; Five rigid plate from left to right are respectively: left outside plate, left inferior middle plate, lamina mediana, right inferior middle plate, right outside plate; Left side outside plate, lamina mediana and right outside plate three plates are overlapping; Plate was overlapping with right middle plate two plates during a left side was inferior; The plate body of left side outside plate, lamina mediana and right outside plate is overlapping with the plate body of left middle plate and right middle plate; The wrench of left side outside plate, lamina mediana and right outside plate is positioned at the bottom of plate body, in the left side time plate with right time in the wrench of plate be positioned at the top of plate body, the plate body, lamina mediana that four layer interlayer plates lay respectively at plate and lamina mediana in the plate body, a left side time of plate in left outside plate and the left side time with right time between the plate body of the inferior middle plate of the plate body and the right side and right outside plate of plate; Constitute the following coupling end of damper jointly by the wrench of left outside plate, lamina mediana, right outside plate, by plate in the left side time with right time in the wrench of plate constitute the last coupling end of damper jointly; 3 following coupling end pin-and-holes are respectively arranged on the wrench of left outside plate, lamina mediana and right outside plate, and the position is cooresponding, and the coupling end pin-and-hole is coaxial down; In a left side time plate with right time in the wrench of plate coupling end pin-and-hole on 3 is respectively arranged, the position is cooresponding, and upward the coupling end pin-and-hole is coaxial; With the left outside plate of sandwich plate contact, a left side time in be processed with the groove identical on the plate body surface of plate, lamina mediana, right middle plate and right outside plate with the metal sheet oad, the metal sheet of every sandwich plate embeds respectively in the plate body groove of the rigid plate that is in contact with it; At the plate body center of five rigid plate that stretch, the run-through board body up and down elongated slot is arranged, on four sandwich plates, elongated slot measure-alike, that connect sandwich plate is also arranged with the cooresponding position of above-mentioned elongated slot; Compress stop gear by one by what left pressing plate, right pressing plate and two push bolt assemblies were formed; The structure of left pressing plate and right pressing plate is identical; Left pressing plate is pressed in the outside face of left outside plate; Right pressing plate is pressed in the outside face of right outside plate; Two bolts hole are respectively arranged on the plate face of left pressing plate and right pressing plate, the bolt in the push bolt assembly pass behind elongated slot and the elongated slot on the sandwich plate of five rigid plate plate bodies with the push bolt assembly in nut combine, five rigid plate and four sandwich plates are compressed; Between left pressing plate and the left outside plate stop gear is arranged, between right pressing plate and the right outside plate stop gear is arranged.
Said five rigid plate are the flat boards that are parallel to each other, and the plate face shape of five rigid plate plate body parts is measure-alike rectangles, and the thickness of left outside plate and right outside plate is identical, and the thickness of left middle plate, lamina mediana and right middle plate is identical.
Said four sandwich plates are that rubber plate is parallel to each other at two, in the middle of the measure-alike rectangular metal plate and with two bonding being integral of metal sheets sulfuration; The thickness of four sandwich plates is identical.
Said rubber plate is a damping rubber.
The thickness of said metal sheet is 1mm～3mm, and its material is corrosion-resistant steel, aluminum alloy, titanium alloy or copper alloy.
The material of said five rigid plate is corrosion-resistant steel, aluminum alloy, titanium alloy, rigid composite material or rigid plastic.
Stop gear between said left pressing plate and the left outside plate is identical with stop gear structure between right pressing plate and the right outside plate, and its structure is one of following structure:
(1) this stop gear is a stop screw, and this stop screw is screwed in the tapped bore on left outside plate or the right outside plate, and left pressing plate or right pressing plate are fixed;
(2) this stop gear is a positive stop, and this positive stop is fixed on the outside face of left outside plate or right outside plate, and the confined planes of the confined planes of this positive stop and left pressing plate or right platen edge is fitted;
(3) the perhaps profile phase position-limited trough together of right pressing plate of profile and left pressing plate is arranged on the outside face of left outside plate or right outside plate, left pressing plate or right pressing plate embed in the above-mentioned position-limited trough.
The preparation method is (one) preparation band type damper sandwich plate
(1) two metal sheets are made sandblast, decontamination oil removal treatment, spray the adhesion agent that adapts with damping rubber at metal sheet and the bonding surface of rubber respectively after drying, for use behind natural draft drying;
(2) earlier a metal sheet bonding plane is placed on the counterdie up, on counterdie, put into core rod, lobe mould and cover die respectively, core rod places the centre of counterdie, and respectively there is a lobe mould both sides of core rod, and the outside of lobe mould is with cover die;
(3) rubber of enough weight is put into mould, then, again another piece metal sheet bonding plane is placed mould through core rod down, cover cope match-plate pattern;
(4) mounted forming mould is put into high temperature vulcanized moulding in the vacuum vulcanization press, obtains sandwich plate;
(5) repeat (1)～(4) step, sulfidization molding obtains four sandwich plates altogether;
(2) assembling band type damper
Four sandwich plates are installed respectively in the respective slot that is embedded in five rigid plate, adopted the push bolt assembly that left pressing plate and right pressing plate are limited to the both sides of damper then, tighten the push bolt assembly and guarantee that left outside plate is parallel with right outside plate, obtain band type damper.
Advantage of the present invention is: the thickness of the rubber plate of adjustable clamp laminate of the present invention or sandwich plate quantity satisfy the rigidity and the damping requirement of different lifting airscrew system; Moulding is easy, is convenient to processing, and assembling is easy, and cost is low, and installing space is little, has the spacing ability of overload; Easy to maintenance, but the visual inspection sandwich plate, the sandwich plate of inefficacy is changed convenient, but and the rigid plate long-term use need not be changed, practice thrift maintenance cost; The band type damper heat radiation increases the service life easily.
Description of drawings
Fig. 1 is a perspective view of the present invention.
Fig. 2 is the right elevation of Fig. 1, the view of promptly seeing from the plate face of right outside plate.
Fig. 3 is the A-A cutaway view of Fig. 2.
Fig. 4 is the perspective view of sandwich plate;
Fig. 5 is the forming mould scheme drawing of sandwich plate.
The specific embodiment
Explain further details in the face of the present invention down.Referring to Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 5; A kind of band type damper; Comprise five rigid plate and four sandwich plates 40 between five rigid plate; Five rigid plate from left to right are respectively: left outside plate 30a, left inferior middle plate 20a, lamina mediana 10, right inferior middle plate 20b, right outside plate 30b; Left side outside plate 30a, lamina mediana 10 and right outside plate 30b three plates are overlapping; Left inferior middle plate 20a is overlapping with right inferior middle plate 20b two plates, and the plate body of plate 20b was overlapping during the plate body of left outside plate 30a, lamina mediana 10 and right outside plate 30b and a left side time middle plate 20a and the right side were inferior, and the wrench of left outside plate 30a, lamina mediana 10 and right outside plate 30b is positioned at the bottom of plate body; In the left side time plate 20a with right time in the wrench of plate 20b be positioned at the top of plate body, the plate body, lamina mediana 10 that four layer interlayer plates 40 lay respectively at plate 20a and lamina mediana 10 in the plate body, a left side time of plate 20a in left outside plate 30a and the left side time with right time between the plate body of plate body and inferior middle plate 20b in the right side and right outside plate 30b of plate 20b;
(1) said five rigid plate are the flat boards that are parallel to each other, and the plate face shape of five rigid plate plate body parts is measure-alike rectangles, and left outside plate 30a is identical with the thickness of right outside plate 30b, and the thickness of left middle plate 20a, lamina mediana 10 and right middle plate 20b is identical; Constitute the following coupling end of damper jointly by the wrench of left outside plate 30a, lamina mediana 10, right outside plate 30b, by plate 20a in the left side time with right time in the wrench of plate 20b constitute the last coupling end of damper jointly; 3 following coupling end pin-and-holes 31 are arranged on the wrench of left outside plate 30a, lamina mediana 10 and right outside plate 30b, and the position is cooresponding, and coupling end pin-and-hole 31 is coaxial down; In a left side time plate 20a with right time in the wrench of plate 20b coupling end pin-and-hole 21 on 3 is respectively arranged, the position is cooresponding, and upward coupling end pin-and-hole 21 is coaxial;
(2) said four sandwich plates 40 be that rubber plate 41 is parallel to each other at two, in the middle of the measure-alike rectangular metal plate and with the bonding all-in-one-piece of two metal sheets, 42 sulfurations; The thickness of four sandwich plates 40 is identical; In with the left outside plate 30a of sandwich plate 40 contact, a left side time, be processed with and the identical groove of metal sheet 42 oads on the plate body surface of plate 20a, lamina mediana 10, right middle plate 20b and right outside plate 30b, every layer metal sheet 42 embeds respectively in the plate body groove of the rigid plate that is in contact with it;
(3) that stretch, the run-through board body up and down elongated slot 70 is arranged at the plate body center of five rigid plate, on four sandwich plates 40, elongated slot 70 measure-alike, that connect sandwich plate 40 is also arranged with above-mentioned elongated slot 70 cooresponding positions; Compress stop gear by one by what left pressing plate 50a, right pressing plate 50b and two push bolt assemblies 60 were formed; Left pressing plate 50a is identical with the structure of right pressing plate 50b; Left pressing plate 50a is pressed in the outside face of left outside plate 30a; Right pressing plate 50b is pressed in the outside face of right outside plate 30b; Two bolts hole are respectively arranged on the plate face of left pressing plate 50a and right pressing plate 50b, and the bolt in the push bolt assembly 60 passes elongated slot 70 and 70 backs of the elongated slot on four sandwich plates 40 of five rigid plate plate bodies and combines with nut in the push bolt assembly 60, and five rigid plate and four sandwich plates 40 are compressed; Between left pressing plate 50a and the left outside plate 30a stop gear is arranged, between right pressing plate 50b and the right outside plate 30b stop gear is arranged.
Described band type damper is characterized in that, said rubber plate 41 is a damping rubber.
Described band type damper is characterized in that, the thickness of said metal sheet 42 is 1～3mm, is processed with that stretch, the run-through board body up and down elongated slot 70 in the middle of the metal sheet, and its material is corrosion-resistant steel, aluminum alloy, titanium alloy or copper alloy.
Described band type damper is characterized in that, the material of said five rigid plate is corrosion-resistant steel, aluminum alloy, titanium alloy, rigid composite material or rigid plastic.
Described band type damper is characterized in that, the stop gear between said left pressing plate 50a and the left outside plate 30a is identical with stop gear structure between right pressing plate 50b and the right outside plate 30b, and its structure is one of following structure:
(1) this stop gear is a stop screw, and this stop screw is screwed in the tapped bore on left outside plate 30a or the right outside plate 30b, and left pressing plate 50a or right pressing plate 50b are fixed;
(2) this stop gear is a positive stop, and this positive stop is fixed on the outside face of left outside plate 30a or right outside plate 30b, and the confined planes at the confined planes of this positive stop and left pressing plate 50a or right pressing plate 50b edge is fitted;
(3) the perhaps profile phase position-limited trough together of right pressing plate 50b of profile and left pressing plate 50a is arranged on the outside face of left outside plate 30a or right outside plate 30b, left pressing plate 50a or right pressing plate 50b embed in the above-mentioned position-limited trough.
The preparation method is,
(1) two metal sheets 42 are made sandblast, decontamination oil removal treatment, the adhesion agent that in the bonding surface spraying of metal sheet 42 and rubber, adapts respectively after drying with damping rubber, for use behind natural draft drying;
(2) earlier metal sheet 42 bonding planes are placed on the counterdie 81 up, on counterdie 81, put into core rod 82, lobe mould 83 and cover die 84 respectively;
(3) rubber of enough weight is put into mould, then, again another piece metal sheet 42 bonding planes are placed mould through core rod 82 down, cover cope match-plate pattern 85;
(4) mounted forming mould 80 is put into high temperature vulcanized moulding in the vacuum vulcanization press, obtains sandwich plate 40;
(5) repeat (1)～(4) step, sulfidization molding obtains four sandwich plates 40 altogether;
(6) with four sandwich plates 40; Install respectively and be embedded in the respective slot of five rigid plate; Adopt push bolt assembly 60 left pressing plate 50a and right pressing plate 50b to be limited to the both sides of damper then; Tighten push bolt assembly 60 and guarantee that left outside plate 30a is parallel with right outside plate 30b, can obtain band type damper like this.
Principle of work of the present invention is: the last coupling end of band type damper is connected with propeller hub with the blade of helicopter respectively with following coupling end.Vibration between blade and the propeller hub causes the up and down relative motion of two ends of damper, thereby the rubber block that drives in the damper in four sandwich plates produces shear deformation up and down.Because rubber block has visoelasticity, its shear deformation makes the inner internal friction that produces of rubber cause in-fighting, so damper can be converted into the mechanical vibrational energy between blade and the propeller hub dissipation heat energy of rubber.
Embodiment one
Left side outside plate 30a, left middle plate 20a, lamina mediana 10, the right side time middle plate 20b and right outside plate 30b are that the titanium alloy material is dull and stereotyped; On the outside face of left outside plate 30a, be processed with four tapped bore, on the outside face of right outside plate 30b, be processed with four tapped bore corresponding to four angles of right pressing plate 50b corresponding to four angles of left pressing plate 50a.
The both sides of the inside face of left side outside plate 30a plate body, the both sides of left middle plate 20a plate body, the both sides of lamina mediana 10 plate bodies, right middle plate 20b plate body and corresponding respectively being processed with and the identical groove of metal sheet 42 oads of inside face of right outside plate 30b plate body.
The material of left pressing plate 50a and right pressing plate 50b can adopt and the rigid plate identical materials; Four tapped bore at four angles of left pressing plate 50a corresponding to left outside plate 30a outside face have four through holes, and four tapped bore at four angles of right pressing plate 50b corresponding to right outside plate 30b outside face have four through holes.
Adopt the molded vulcanization method to pass through mould with high damping silicone rubber and two metal sheet 42 bonding sulfidization molding sandwich plates 40.In the sulfidization molding process, can in sandwich plate 40, form through hole 70 through core rod.
Behind four sandwich plates 40 of moulding; Install respectively and be embedded in the respective slot of five rigid plate; With screw left pressing plate 50a and right pressing plate 50b are fixed on left outside plate 30a and right outside plate 30b outside face; Adopt push bolt assembly 60 through spacing hole 70, tighten push bolt assembly 50 and guarantee that left outside plate 30a is parallel with right outside plate 30b.Can realize transshipping position-limiting action like this.
At the distolateral mounting hole 21 and 31 of titanium alloy sheet, can be connected with the propeller hub center piece with blade respectively through connecting device.When helicopter takes off on ground or aloft flies, can vibrate between blade and the propeller hub, at this moment damper can play the effect of vibration damping, avoids helicopter generation ground resonance or aerial resonance.
Embodiment two
Left side outside plate 30a, left middle plate 20a, lamina mediana 10, the right side time middle plate 20b and right outside plate 30b are that stainless steel is dull and stereotyped, at the middle position-limited trough that is processed with respectively of the outside face of left outside plate 30a and right outside plate 30b.
The both sides of the inside face of left side outside plate 30a plate body, the both sides of left middle plate 20a plate body, the both sides of lamina mediana 10 plate bodies, right middle plate 20b plate body and corresponding respectively being processed with and the identical groove of metal sheet 42 oads of inside face of right outside plate 30b plate body.
The material of left pressing plate 50a and right pressing plate 50b can adopt and the rigid plate identical materials, on the binding face of left pressing plate 50a and left outside plate 30a with the binding face of right pressing plate 50b and right outside plate 30b on all corresponding boss that is processed with the position-limited trough applying.
Adopt the molded vulcanization method to pass through mould with damping expanded material and two metal sheet 42 bonding sulfidization molding sandwich plates 40.In the sulfidization molding process, can in sandwich plate 40, form through hole 70 through core rod.
Behind four sandwich plates 40 of moulding; Install respectively and be embedded in the respective slot of five rigid plate; Adopt push bolt assembly 60 with the both sides that left pressing plate 50a and right pressing plate 50b are limited to damper then, tighten push bolt assembly 60 and guarantee that left outside plate 30a is parallel with right outside plate 30b.Can realize transshipping position-limiting action like this.
At the distolateral mounting hole 21 and 31 of stainless steel flat plate, can be connected with the propeller hub center piece with blade respectively through connecting device.When helicopter takes off on ground or aloft flies, can vibrate between blade and the propeller hub, at this moment damper can play the effect of vibration damping, avoids helicopter generation ground resonance or aerial resonance.
Claims (8)
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| CN201110362162.6A CN102501970B (en) | 2011-11-15 | 2011-11-15 | Band type damper and preparation method thereof |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104334914A (en) * | 2012-06-27 | 2015-02-04 | 波音公司 | Damping mechanical linkage |
| WO2016033412A1 (en) * | 2014-08-29 | 2016-03-03 | Aktiebolaget Skf | Elastomer having tear reducing contoured edges |
| EP3130537A1 (en) | 2015-08-14 | 2017-02-15 | Airbus Helicopters | A damper device and an aircraft |
| CN106965927A (en) * | 2015-11-11 | 2017-07-21 | 瑞士玛瑞恩克直升机公司 | Rotor blade coupling arrangement for the rotor head of gyroplane |
| CN109592024A (en) * | 2016-07-05 | 2019-04-09 | 金福珍 | A kind of Intelligent unattended machine |
| EP3575629A1 (en) | 2018-05-31 | 2019-12-04 | Airbus Helicopters | Hydro-elastic shock absorber, and aircraft |
| FR3090777A1 (en) | 2018-12-19 | 2020-06-26 | Airbus Helicopters | HYDROELASTIC SHOCK ABSORBER, ROTOR COMPRISING SUCH A HYDROELASTIC SHOCK ABSORBER AND ASSOCIATED AIRCRAFT |
| US10759529B2 (en) | 2015-11-11 | 2020-09-01 | Kopter Group Ag | Rotor blade coupling device of a rotor head for a rotorcraft |
| US11161601B2 (en) | 2018-03-30 | 2021-11-02 | Airbus Helicopters | Hydro-elastic damper and an aircraft |
| US12060148B2 (en) | 2022-08-16 | 2024-08-13 | Honeywell International Inc. | Ground resonance detection and warning system and method |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104334914A (en) * | 2012-06-27 | 2015-02-04 | 波音公司 | Damping mechanical linkage |
| CN104334914B (en) * | 2012-06-27 | 2016-07-20 | 波音公司 | Damping mechanical linkage which controls |
| WO2016033412A1 (en) * | 2014-08-29 | 2016-03-03 | Aktiebolaget Skf | Elastomer having tear reducing contoured edges |
| US10479493B2 (en) | 2015-08-14 | 2019-11-19 | Airbus Helicopters | Damper device and an aircraft |
| EP3130537A1 (en) | 2015-08-14 | 2017-02-15 | Airbus Helicopters | A damper device and an aircraft |
| CN106965927A (en) * | 2015-11-11 | 2017-07-21 | 瑞士玛瑞恩克直升机公司 | Rotor blade coupling arrangement for the rotor head of gyroplane |
| US10759529B2 (en) | 2015-11-11 | 2020-09-01 | Kopter Group Ag | Rotor blade coupling device of a rotor head for a rotorcraft |
| CN109592024A (en) * | 2016-07-05 | 2019-04-09 | 金福珍 | A kind of Intelligent unattended machine |
| US11161601B2 (en) | 2018-03-30 | 2021-11-02 | Airbus Helicopters | Hydro-elastic damper and an aircraft |
| EP3575629A1 (en) | 2018-05-31 | 2019-12-04 | Airbus Helicopters | Hydro-elastic shock absorber, and aircraft |
| US11518503B2 (en) | 2018-05-31 | 2022-12-06 | Airbus Helicopters | Hydroelastic damper, and an aircraft |
| FR3090777A1 (en) | 2018-12-19 | 2020-06-26 | Airbus Helicopters | HYDROELASTIC SHOCK ABSORBER, ROTOR COMPRISING SUCH A HYDROELASTIC SHOCK ABSORBER AND ASSOCIATED AIRCRAFT |
| EP3680510A1 (en) | 2018-12-19 | 2020-07-15 | Airbus Helicopters | Hydroelastic damper, rotor comprising such a hydroelastic damper and associated aircraft |
| US12060148B2 (en) | 2022-08-16 | 2024-08-13 | Honeywell International Inc. | Ground resonance detection and warning system and method |
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| CN102501970B (en) | 2014-12-24 |
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