CN209382266U - A kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor - Google Patents

Abstract

The utility model relates to a kind of viscoelastic shimmy-dampers for large-tonnage unmanned helicopter rotor, including the first attachment base, second attachment base and multiple stripper loops, first attachment base is flange arrangement and is equipped with multiple connecting holes, second attachment base is disk-like structure and is equipped with bolt hole in the middle, second attachment base and the first attachment base coaxial spaced are arranged, multiple stripper loop coaxial spaceds are distributed between the first attachment base and the second attachment base, between first attachment base and stripper loop, between second attachment base and stripper loop, and rubber ring is equipped with by vulcanization between adjacent stripper loop.Its is of simple structure and low cost, deformability is strong, subtracts the good advantage of pendulum effect.

Description

A kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor

Technical field

The utility model relates to a kind of dampers, and in particular to a kind of viscoelastic for large-tonnage unmanned helicopter rotor subtracts Put device.

Background technique

When helicopter flight, the blade of rotor system can be generated in rotary course wave with it is shimmy.For blade Shimmy vibration couple if not being controlled and being easy to generate with body movement, and then causes helicopter ground resonance and aerial total Vibration, not only can be difficult to flight manipulation increase, results even in helicopter disintegration.For unmanned helicopter, because its lighter in weight, Blade is shorter, and the mode of metal hinge commonly employed in the art connects blade with propeller hub.But the blade of unmanned helicopter is revolving Shimmy vibration is equally existed during turning, and for 1 ton or more of large-tonnage unmanned helicopter, the shimmy phenomenon of blade generation It becomes apparent, and metal hinge can not provide the damping of blade lagging needs, increase the manipulation difficulty of unmanned helicopter, influence The safety and reliability of unmanned helicopter flight.

Utility model content

The purpose of the utility model is to provide a kind of viscoelastic shimmy-dampers for large-tonnage unmanned helicopter rotor, have Of simple structure and low cost, deformability is strong, subtracts the good advantage of pendulum effect.

To solve the above-mentioned problems in the prior art, for large-tonnage, nobody goes straight up to one kind provided by the utility model The viscoelastic shimmy-damper of machine rotor, including the first attachment base, the second attachment base and multiple stripper loops, first attachment base are flange Structure is simultaneously equipped with multiple connecting holes, and second attachment base is disk-like structure and is equipped with bolt hole, the second attachment base in the middle Be arranged with the first attachment base coaxial spaced, the multiple stripper loop coaxial spaced be distributed in the first attachment base and the second attachment base it Between, pass through sulphur between the first attachment base and stripper loop, between the second attachment base and stripper loop and between adjacent stripper loop Change and is equipped with rubber ring.

Further, a kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor of the utility model, wherein described First attachment base position corresponding with stripper loop makes the opening width of groove be less than stripper loop circumferentially arranged with V-shape groove Ring width, second attachment base position corresponding with stripper loop makes the root width of protrusion circumferentially arranged with V-shape protrusion Less than the ring width of stripper loop, the stripper loop is circumferentially arranged with the V-shape structure with groove and male cooperation.

Further, a kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor of the utility model, wherein described It is equipped with boss relative to the side of the first attachment base in the middle part of second attachment base, the bolt hole penetrates through boss and uses stepped hole knot Structure.

Further, a kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor of the utility model, wherein described First attachment base, the second attachment base and stripper loop are using stainless steel, titanium alloy or aluminium alloy production.

Further, a kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor of the utility model, wherein described Rubber ring is made of silicon rubber.

Further, a kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor of the utility model, wherein described Stripper loop is arranged four and is uniformly distributed it between the first attachment base and the second attachment base.

A kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor of the utility model compared with prior art, has Following advantages: the utility model is allowed by the first attachment base of setting, the second attachment base and multiple stripper loops and is stated the first attachment base and adopt With flange arrangement and multiple connecting holes are set, allow the second attachment base using disk-like structure and bolt hole being arranged in the middle, allow the Two attachment bases and the first attachment base coaxial spaced are arranged, and allow multiple stripper loop coaxial spaceds to be distributed in the first attachment base and second and connect Between joint chair, and between the first attachment base and stripper loop, between the second attachment base and stripper loop and adjacent stripper loop it Between by vulcanization setting rubber ring.Thus just constitute it is a kind of it is of simple structure and low cost, deformability is strong, subtracts pendulum effect The good viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor.In practical applications, the utility model is allowed to connect by second The propeller hub of bolt hole and unmanned helicopter on joint chair connects, and the connecting hole of blade and the first attachment base of the utility model is allowed to connect It connects.During unmanned helicopter flight, shear-deformable by rubber ring makes blade lagging obtain rapid decay, can be effective Air Resonance and ground resonance are avoided, manipulation difficulty is reduced, improves safety.The utility model passes through in the first attachment base And second multilayer rubber ring and stripper loop are arranged between attachment base, enhance the deformability of shimmy-damper, and be avoided that appearance is hard Collision generates impact.

Shown specific embodiment is used for large-tonnage unmanned helicopter rotor to the utility model one kind with reference to the accompanying drawing Viscoelastic shimmy-damper be described in further detail.

Detailed description of the invention

Fig. 1 is a kind of top view of the viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor of the utility model；

Fig. 2 is a kind of right view of the viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor of the utility model；

Fig. 3 is the A-A direction view in Fig. 1.

Specific embodiment

Firstly the need of explanation, the nouns of locality such as upper and lower, front, rear, left and right described in the utility model are only according to attached Scheme carry out description, in order to understand, not to the technical solution of the utility model and be claimed range progress limitation.

A kind of tool of the viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor of the utility model as shown in Figure 1 to Figure 3 Body embodiment, including the first attachment base 1, the second attachment base 2 and four stripper loops 3.Allow the first attachment base 1 using flange arrangement And four connecting holes 11 are set.It allows the second attachment base 2 using disk-like structure and bolt hole 21 is set in the middle.Allow the second connection Seat 2 and 1 coaxial spaced of the first attachment base are arranged, and four 3 coaxial spaceds of stripper loop is allowed to be distributed in the first attachment base 1 and the second connection Between seat 2, and between the first attachment base 1 and stripper loop 3, between the second attachment base 2 and stripper loop 3 and adjacent separation Pass through vulcanization setting rubber ring 4 between ring 3.

Just constitute through the above arrangement it is a kind of it is of simple structure and low cost, deformability is strong, subtracts pendulum effect is good and be used for The viscoelastic shimmy-damper of large-tonnage unmanned helicopter rotor.In practical applications, the utility model is allowed to pass through on the second attachment base 2 Bolt hole 21 is connect with the propeller hub of unmanned helicopter, and blade and the connecting hole 11 of the first attachment base of the utility model 1 is allowed to connect.? In flight course, shear-deformable by rubber ring 4 makes blade lagging obtain rapid decay, can effectively avoid Air Resonance And ground resonance, the manipulation difficulty of unmanned helicopter is reduced, safety is improved.The utility model passes through in the first attachment base 1 and second multilayer rubber ring 4 and stripper loop 3 are arranged between attachment base 2, enhance the deformability of shimmy-damper, and be avoided that out Existing hard collision generates impact.Show that the utility model can fully meet 1 ton or more of large-tonnage unmanned helicopter through practical application Rotor system subtracts pendulum demand.It should be noted that the stripper loop 3 in the utility model is not limited to setting four, it can be with root According to needing to be arranged three or four or more.

As prioritization scheme, present embodiment makes the first attachment base 1 position corresponding with stripper loop 3 circumferentially arranged V-shape groove 12, and the opening width of groove 11 is made to be less than the ring width of stripper loop 3, make the second attachment base 2 and the stripper loop 3 right The circumferentially arranged V-shape protrusion 22 in the position answered, and the root width of protrusion 22 is made to be less than the ring width of stripper loop 3, and allow point The circumferentially arranged V-shape structure with 22 cooperation of groove 12 and protrusion of spacer ring 3.This setting not only enhances the knot of shimmy-damper Structure strength and stability, and so that rubber ring 4 is changed to shear-compression deformation by pure shear shear deformation in edgewise direction, it improves and subtracts pendulum The shimmy rigidity of device needs big rigidity to realize vibration uncoupling especially suitable for large-tonnage unmanned helicopter in edgewise direction.For The stability of structural strength and connection is improved, present embodiment is at 2 middle part of the second attachment base relative to the first attachment base 1 Side is provided with boss 23, allows bolt hole 21 to penetrate through boss 23 and uses step pore structure.

It should be noted that in practical applications, the utility model usually allows stripper loop 3 in the first attachment base 1 and second It is uniformly distributed between attachment base 2, to enhance the stability and harmony of shimmy-damper.And make the first attachment base 1, the second attachment base 2 With stripper loop 3 using stainless steel, titanium alloy or aluminium alloy production, to guarantee its structural strength, but it is not limited to this, can also adopt With other kinds of metal material.In addition, the utility model usually allows rubber ring 4 to be made of silicon rubber, with abundant Li Qigao Intensity, high resiliency, high-damping characteristic, enhance the Performance And Reliability of shimmy-damper, but it is not limited to this, can also as needed Using other kinds of rubber material.

Above embodiments are only the descriptions carried out to preferred embodiments of the present invention, are not asked to the utility model Protection scope is asked to be defined, without departing from the design concept of the present utility model, those skilled in the art are according to this reality The various forms of deformations made with novel technical solution should all fall into the protection that claims of the utility model determine In range.

Claims (6)

1. a kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor, which is characterized in that including the first attachment base (1), Second attachment base (2) and multiple stripper loops (3), first attachment base (1) is flange arrangement and is equipped with multiple connecting holes (11), Second attachment base (2) is for disk-like structure and in the middle equipped with bolt hole (21), the second attachment base (2) and the first attachment base (1) coaxial spaced is arranged, the multiple stripper loop (3) coaxial spaced be distributed in the first attachment base (1) and the second attachment base (2) it Between, between the first attachment base (1) and stripper loop (3), between the second attachment base (2) and stripper loop (3) and adjacent stripper loop (3) rubber ring (4) are equipped with by vulcanization between.

2. a kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor according to claim 1, which is characterized in that First attachment base (1) position corresponding with stripper loop (3) makes groove (12) circumferentially arranged with V-shape groove (12) Opening width is less than the ring width of stripper loop (3), and second attachment base (2) position corresponding with stripper loop (3) is circumferentially arranged with V Font protrusion (22), and make the root width of raised (22) less than the ring width of stripper loop (3), the stripper loop (3) circumferentially sets There is the V-shape structure with groove (12) and raised (22) cooperation.

3. a kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor according to claim 2, which is characterized in that Boss (23) are equipped with relative to the side of the first attachment base (1) in the middle part of second attachment base (2), bolt hole (21) perforation Boss (23) and use step pore structure.

4. a kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor according to claim 3, which is characterized in that First attachment base (1), the second attachment base (2) and stripper loop (3) are using stainless steel, titanium alloy or aluminium alloy production.

5. a kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor according to claim 3, which is characterized in that The rubber ring (4) is made of silicon rubber.

6. a kind of viscoelastic shimmy-damper for large-tonnage unmanned helicopter rotor according to claim 3, which is characterized in that The stripper loop (3) is arranged four and is uniformly distributed it between the first attachment base (1) and the second attachment base (2).