Cyclic variable-pitch screw rod dustproof device for helicopter

• Main Authors: FANG LIYING, SI DANYI, ZHAO LIANG, FENG HANG, DENG HAIXIA, XU YOUSONG
• Format: Patent
• Language: Chinese; English
• Published: 29.06.2016
• Subjects: AEROPLANES; AIRCRAFT; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSIONTRANSMISSIONS IN AIRCRAFT; AVIATION; BLASTING; COSMONAUTICS; CYLINDERS; ENGINEERING ELEMENTS AND UNITS; EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLYING SUITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; HELICOPTERS; LIGHTING; MECHANICAL ENGINEERING; PARACHUTES; PERFORMING OPERATIONS; PISTONS; SEALINGS; THERMAL INSULATION IN GENERAL; TRANSPORTING; WEAPONS

The invention relates to a cyclic variable-pitch screw rod dustproof device for a helicopter, in particular to a protective device capable of achieving the purpose of preventing dust from falling into a cyclic variable-pitch screw rod at the bottom of a helicopter cockpit. The cyclic variable-pitch screw rod dustproof device is one of important parts of a helicopter flight control system. The cyclic variable-pitch screw rod dustproof device is used for realizing component sealing of the cyclic variable-pitch screw rod in the cockpit and preventing the situation that as the dust falls into the cyclic variable-pitch screw rod at the bottom of the helicopter cockpit in the daily flight process, the clamping stagnation of a fright control cabling system is caused. The invention provides the cyclic variable-pitch screw rod dustproof device which is brief in structure, attractive in appearance and convenient to maintain, has a new structure and is made of new materials. 本发明涉及一种直升机周期变距杆防尘装置，尤其是能够实现防止灰尘落入直升机座舱底部周期变距杆