The invention relates to the technical field of helicopter tail rotor manufacturing, and solves the problems that lubricating oil circulation is not smooth and a propeller pitch control shaft bearing assembly is not fully lubricated due to the fact that lubricating oil flow lacks an oil guide condition under the influence of gravity when a helicopter does various large-dip-angle maneuvers. The propeller pitch control shaft assembly comprises a propeller pitch control shaft and a ball bearing seat, the propeller pitch control shaft and the ball bearing seat are arranged in a tail rotor shaft, a control shaft inner hole is formed in the propeller pitch control shaft, and a connecting rod is arranged in the control shaft inner hole. According to the double-row ball bearing, a space narrow channel formed by the double-row ball bearing outer ring and the double-row ball bearing inner ring can be effectively blocked, the bearing closed inner cavity is defined, and lubricating grease filled in the bearing closed inner cavity is sealed by the first bearing sealing ring and the second bearing sealing ring; no matter how the helicopter maneuvers and how the elevation angle of the propeller pitch control shaft changes, the lubricating grease does not leak.
本发明涉及直升机尾桨制造技术领域,解决了直升机做各种大倾角机动时,受重力影响,滑油流动缺少导油条件,使得滑油循环不畅,造成桨距操纵轴轴承组件润滑不充分的问题,具体为一种安装自密封脂润滑轴承的桨距操纵轴组件及装配方法,包括有设置于尾桨轴内部的桨距操纵轴和球轴承座,所述桨距操纵轴内部开设有操纵轴内孔,所述操纵轴内孔内部设置有连杆。本发明可有效地对双列球轴承外环和双列球轴承内环所夹空间狭道进行封堵,并围成轴承封闭内腔,轴承封闭内腔中填充的润滑脂,受到第一轴承密封圈和第二轴承密封圈的密封作用;无论直升机如何进行机动、桨距操纵轴仰角如何变化,润滑脂不会外泄。
Pitch control shaft assembly provided with self-sealing grease lubrication bearing and assembling method
一种安装自密封脂润滑轴承的桨距操纵轴组件及装配方法
2023-03-07
Patent
Electronic Resource
Chinese
Grease lubrication for railway axlebox bearing
IuD Bahn | 2007
|Grease lubrication of ball-bearing motors and generators
Engineering Index Backfile | 1946
|Speed Dependence of Bearing Torque - Anomalous Effects with Grease Lubrication
British Library Conference Proceedings | 2013
|