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Conical damping hole type buffer for undercarriage of passenger plane

A technology of damping holes and buffers, which is applied in the direction of shock absorbers, shock absorbers, mechanical equipment, etc., to achieve the effects of continuous and uniform load distribution, simple structure, and full shock absorbing stroke curve

Inactive Publication Date: 2013-10-09
BEIHANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems existing in the prior art, the present invention proposes a conical orifice damper for the landing gear of an airliner, with the purpose of solving the disadvantages of the traditional oil-gas buffer and improving the overall structure of the existing double-cavity buffer

Method used

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  • Conical damping hole type buffer for undercarriage of passenger plane
  • Conical damping hole type buffer for undercarriage of passenger plane
  • Conical damping hole type buffer for undercarriage of passenger plane

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Embodiment Construction

[0023] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0024] The present invention proposes a kind of conical damping hole type buffer of passenger aircraft landing gear, such as figure 2 , Figure 3-A and Figure 3-BAs shown, it includes an external fixed assembly, an internal moving assembly and a separation part; wherein the external fixed assembly includes an external actuator 4, a stroke plunger 6 and a sealing device structure 14, and the internal moving assembly includes an internal actuator 5 and a damping piston Head 12, separate components including damping brake valve 13 and air chamber diaphragm piston 8. The bottom of the inner cavity of the outer actuator 4 is provided with an inner actuator 5, and a sealing device structure 14 is arranged between the outer wall of the inner actuator 5 and the inner wall of the outer actuator 4 for sealing, and the The sealing device structure 14 is fixedly con...

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Abstract

The invention provides a conical damping hole type buffer for an undercarriage of a passenger plane. The conical damping hole type buffer comprises an external fastening connection assembly, an internal movable assembly and a separation part, wherein the external fastening connection assembly comprises an outer actuating cylinder, a travel plunger and a sealing device structure; the internal movable assembly comprises an inner actuating cylinder and a damping piston head; the separation part comprises a damping braking valve and an air chamber partition plate piston; a conical damping hole A is formed in the center at the bottom of the travel plunger; and a plurality of conical damping holes B are formed on the outer edge of the damping piston head uniformly along the axial direction. In the conical damping hole type buffer for the undercarriage of the passenger plane, the optimal buffer full-travel variable damping working condition is realized by designing conical angles of the conical damping holes and an area ratio of oil inlet / outlet end faces in a creative design method for the conical tubular damping holes. Simultaneously, compared with the conventional oil needle type design, the conical damping hole type buffer has the advantages that a structure is simpler and difficult to damage due to friction, impact and the like, and the manufacturing and maintenance cost is low.

Description

technical field [0001] The invention belongs to the technical field of aviation machinery, and in particular relates to a conical damping hole type buffer for landing gear of an airliner. Background technique [0002] In the design of large-scale aircraft take-off and landing, oil-gas shock absorbers are used in the design form, using the compression deformation of gas to absorb energy, and a simple damping hole is provided at the oil-gas separation point, and the friction of liquid flowing through the damping hole at high speed is used to consume energy. With the increase of the take-off weight of the aircraft, especially in large civil airliners, in order to ensure the stability of the aircraft's ground landing and taxiing, it is usually necessary to adopt the design form of the variable damping hole. In general, the equivalent area of ​​the damping hole in the compression process of the buffer is larger than the equivalent area of ​​the damping hole in the expansion proce...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16F9/06F16F9/32F16F9/58
Inventor 袁欣洪增辉孙铁源孙佳贾玉红
Owner BEIHANG UNIV
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