An elastic floating piston

Abstract

The invention provides a floating piston with elasticity, and belongs to the field of helicopter landing gear structure design. The floating piston comprises an outer piston (1), an inner piston (3) and a hole retaining ring (4). The outer piston (1) is slidably arranged in a piston cylinder (9). A first gas chamber and a first oil chamber are limited out of the piston cylinder. A blind hole is formed in the side, facing the first oil chamber, of the outer piston (1). The inner piston (3) is slidably arranged in the blind hole. The hole retaining ring (4) is arranged in the opening end of theblind hole and used for limiting the inner piston (3) from slipping out of the blind hole. A second gas chamber and a second oil chamber are limited out of the blind hole through the inner piston (3).An oil liquid of the first oil chamber can be circulated with an oil liquid of the second oil chamber through a through hole in the hole retaining ring (4). The floating piston with elasticity can satisfy the design demand of a landing gear on a buffer opening force, especially, the influence on an existing structure is small, structure changing is facilitated, and the buffer landing performanceis not affected.

Description

technical field [0001] The invention belongs to the field of helicopter landing gear structure design, and in particular relates to an elastic floating piston. Background technique [0002] Helicopter landing gear is designed to meet ground resonance requirements, and the stiffness and opening force of the buffer usually need to be adjusted during the design process. There are many ways to adjust the opening force. The traditional treatment method is to design the buffer as a double-chamber buffer, and adjust the filling parameters of the two air chambers to meet the requirements for adjusting the opening force and meet the landing performance requirements. But the disadvantage of this is to increase the complexity of the internal structure of the buffer, and at the same time limit the space of the internal structure. Another way is to pre-compress the spring inside the buffer. Compared with the former method, this treatment method has a much simpler structure when there is...

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Problems solved by technology

But the disadvantage of this is to increase the complexity of the internal structure of the buffer, and at the same time accept the limitation of the internal structure space

Another way is to pre-compress the spring inside the buffer. Compared with the former method, this treatment method has a much simpler structure when there is a suitable structural installation space, but because the spring can reduce the opening force in a limited space. limited

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