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Cable protecting structure between propeller shaft and propeller hub of helicopter

A technology for protecting structures and helicopters, applied in aircraft lighting protectors, cable installation, aircraft electrostatic dischargers, etc., can solve problems such as fatigue fracture of lug attachments, large mutual movement deformation, etc., to solve fatigue fracture problems and improve fatigue characteristics, the effect of reducing stiffness

Pending Publication Date: 2018-05-15
AVIC HUIYANG AVIATION PROPELLER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The lug at the root of the ground wire, the metal braided tube for aviation and the flexible steel cable for aviation are relatively deformed by mutual movement, which eventually leads to fatigue fracture of the lug attachment

Method used

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  • Cable protecting structure between propeller shaft and propeller hub of helicopter
  • Cable protecting structure between propeller shaft and propeller hub of helicopter

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Embodiment Construction

[0017] The present invention will be described in further detail below.

[0018] A cable protection structure between a helicopter hub and a propeller shaft is provided, the two ends of the cable are connection ends, one connection end is connected to the propeller hub, and the other connection end is connected to the propeller shaft; the cable belt With insulating sleeve;

[0019] Three-layer heat-shrinkable sleeves are set on both connection ends of the cable, and the lengths of the inner heat-shrinkable sleeve, the middle layer heat-shrinkable sleeve and the outer layer heat-shrinkable sleeve gradually increase; the insulating sleeve is made of soft polyethylene tube, the inner heat-shrinkable sleeve, the middle layer heat-shrinkable sleeve and the outer heat-shrinkable sleeve are all rubber sleeves; the two connecting ends of the cable are ground connection ends; the inner heat-shrinkable sleeve The length is 55mm; the length of the heat-shrinkable sleeve of the middle la...

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PUM

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Abstract

The invention relates to a cable protecting structure between a propeller shaft and a propeller hub of a helicopter. The two ends of the cable are connecting ends, one connecting end is connected to the propeller hub, and the other connecting end is connected to the propeller shaft; the cable is provided with an insulating sleeve; the two connecting ends of the cable are each sleeved with three layers of heat-shrinkable sleeves, and the length of the inner layer heat-shrinkable sleeve, the length of the middle layer heat-shrinkable sleeve and the length of the outer layer heat-shrinkage sleeveare gradually increased. The rigidity of the earth wire middle flexible portion is lowered, the rigidity of the whole earth wire is distributed again due to the improved whole structure of the earthwire, and the strength is locally reinforced, so that the fatigue property of the earth wire is improved, and the problem of fatigue cracks of the earth wire is solved.

Description

Technical field: [0001] The invention belongs to the optimization and improvement of mechanical structure, and relates to the optimization and improvement of an anti-fracture structure of a grounding wire used for lightning protection of civil helicopters. Background technique: [0002] One end of the grounding wire is fixed on the rotor hub, the other end is fixed on the rotor shaft, and the lugs at both ends of the grounding wire are fixed, and the middle part is suspended. During use, it runs together with the rotor hub and the rotor shaft, and is affected by aerodynamic load and vibration, and oscillates cyclically. The lug at the root of the ground wire, the metal braided pipe for aviation and the flexible steel cable for aviation are relatively deformed by mutual movement, which eventually leads to fatigue fracture of the attachment of the lug. In order to solve the problem of fatigue fracture of the ground wire, the structure is optimized and improved. Invention co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64D45/02H02G13/00
CPCH02G13/00B64D45/02
Inventor 何九领权雪分谭林月陈丽智
Owner AVIC HUIYANG AVIATION PROPELLER
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