Spherical elastic bearing for helicopter rotor wing and molding method thereof

A technology for helicopter rotors and elastic bearings, which is applied in the direction of flexible bearings, rotational motion bearings, bearings, etc., and can solve the problems of heavy maintenance and repair, complex structure, and inability to bear shimmy loads

Inactive Publication Date: 2011-01-05
AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This kind of elastic element torsion bar still has the disadvantages of complex structure, heavy maintenance workload, and low fatigue life.
In addition, U.S. Patents US4232563 and US4435097 respectively disclose a tapered-cylindrical combined rubber-metal laminated bearing and a tapered rubber-metal laminated elastic bearing. Bearings of this structure can only bear compressive loads and torsional loads. load, but not shimmy loads

Method used

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  • Spherical elastic bearing for helicopter rotor wing and molding method thereof
  • Spherical elastic bearing for helicopter rotor wing and molding method thereof
  • Spherical elastic bearing for helicopter rotor wing and molding method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The material of the two rigid parts is aluminum; the radius of the spherical concave surface in the first rigid part 20 is 54.2mm, and the second rigid part 30 has a spherical convex surface with the same spherical center as the spherical concave surface of the first rigid body, and the spherical radius is 30mm;

[0033] The material of the rigid spherical spacer 40 is stainless steel, and the thickness of the spacer is 1.0mm; according to the helicopter load of 4 tons, the required compression stiffness of the spherical elastic bearing is calculated, and then through iterative calculation, the number of spacers of the spherical elastic bearing is 11 layers; the rigid spherical spacer 40 has a central opening 41, which is used as a positioning hole during molding. The circumferential direction of the rigid spherical spacer 40 has a curling edge 42 for positioning during molding.

[0034] The elastic material 50 is a synthetic polyisoprene rubber material, and the thickn...

Embodiment 2

[0047]The material of the rigid part is stainless steel; the radius of the spherical concave surface in the first rigid part 20 is 89.2 mm, and the second rigid part 30 has a spherical convex surface with the same spherical center as the spherical concave surface of the first rigid body, and the spherical radius is 40 mm;

[0048] The material of the rigid spherical spacer is aluminum, and the thickness of the spacer is 1.2mm; according to the helicopter load of 6 tons, the compression stiffness required by the spherical elastic bearing is calculated, and then through iterative calculation, the number of spacers for the spherical elastic bearing is 20 floors;

[0049] The elastic material is natural rubber material, and the thickness of each layer of elastic material is 1.2mm;

[0050] The adhesive corresponding to the elastic material adopts Chemlok 250 (product of Lord Company);

[0051] The forming method of the spherical elastic bearing is as follows:

[0052] ①Sandblast...

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Abstract

The invention belongs to the technology of controlling internal moving/vibrating elastomer members in mechanical systems and the like and relates to a spherical elastic bearing for a helicopter rotor wing and a molding method thereof. The bearing comprises two rigid members, wherein one end face of the first rigid member has a central concave spherical face, and a bolt through hole for fixed connection with a paddle component of the rotor wing of the helicopter is formed on a lateral face of the first rigid member; one end face of the second rigid member has a central convex spherical face which is concentric with the central concave spherical face of the first rigid member, and a mounting hole for fixed connection with a central member of a paddle hub of the helicopter rotor wing is formed on a lateral side of the second rigid member; and a rigid spherical spacer is arranged between the two rigid members, the spherical centre of the rigid spherical spacer is the same as the central concave spherical face of the first rigid member, a through hole is formed in the centre of the rigid spherical spacer, and an elastic material is filled between the rigid spherical spacer and the first rigid member and between the rigid spherical spacer and the second rigid member. The spherical elastic bearing needs no lubricant, and the service life of the spherical elastic bearing is 5 to 10 times as long as the traditional bearing, and the structure is relatively simple.

Description

technical field [0001] The invention belongs to the elastic component technology for controlling internal motion / vibration of a mechanical system and the like, and relates to a spherical elastic bearing for a helicopter rotor and a forming method thereof. Background technique [0002] The helicopter rotor system is composed of blades and hubs. The traditional articulated (also known as fully articulated) rotor hub realizes the flapping, shimmy and pitch-changing motions of the blades by setting flapping hinges, shimmy hinges and pitch-variable hinges on the hub. Thrust bearings are used in the axial hinge to bear the centrifugal force and achieve variable pitch motion. Traditional thrust bearings use anti-friction metal bearings, which have always had disadvantages such as fast wear, short life, need for lubricants and uneven distribution of lubricants, and difficult maintenance and overhaul. [0003] In order to overcome the shortcomings of traditional metal bearings, US ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16C27/00F16C27/06B64C27/35B29C35/00
Inventor 王景鹤苏正涛米志安蒋洪罡涂春潮赖亮庆
Owner AVIC BEIJING INST OF AERONAUTICAL MATERIALS
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