A high-speed cylinder with built-in gas-liquid mixing buffer retraction

Abstract

The invention discloses an internal gas-liquid mixed buffer shrinkage high-speed cylinder. A piston rod is mounted in a cylinder drum; the cylinder drum is provided with an intake port B in a rod cavity A; a cavity is formed in the piston rod for placing a damping device, a floating piston and an inflation one-way valve in sequence; the inner cavity of the piston rod is divided into C and D cavities by the floating piston; the C cavity communicates with a cylinder rodless cavity F through a damping hole E on the damping device; the cylinder rodless cylinder F is filled with hydraulic oil; gasis prefilled in the D cavity through an inflation plug and the inflation one-way valve; a damping ring is mounted at a rodless end of the piston rod; a mechanical lock is mounted in a K hole of the cylinder drum; the K hole is positioned at the travel tail end of the piston rod; the piston rod moves to the rodless cavity under the effect of filling the gas in the intake port B; buffer hydraulic oil enters the C cavity under compression by the piston rod; the floating piston moves to the D cavity; prefilled gas in the D cavity provides back pressure; and when the piston rod is returned, the pressure of the prefilled gas pushes the floating piston and the buffer hydraulic oil to return.

Description

technical field [0001] The invention relates to a buffered high-speed cylinder, in particular to a retractable single-acting high-speed cylinder. It can be applied to the landing gear and door retractable mechanism of drones or other space vehicles, and the landing system of aircraft, and is suitable for various industrial purposes. Background technique [0002] For retractable high-speed cylinders, the buffer structure is not easy to design and install. For the current buffer devices, most of them are non-reusable buffers. The end of high-speed cylinder operation is prone to shock and vibration, which will damage the cylinder and related peripheral equipment. Therefore, it is necessary to install a buffer device at the end of the stroke. At present, there are various forms of cylinder buffer, mainly including mechanical buffer, pneumatic buffer, hydraulic buffer, etc. For existing mechanical buffers, there are disadvantages such as weak buffering capacity, difficulty in ad...

AI Technical Summary

Problems solved by technology

For existing mechanical buffers, there are disadvantages such as weak buffering capacity, difficult adjustment, and short service life; pneumatic buffering has disadvantages such as weak buffering capacity and difficult to control; hydraulic buffering structure is complicated and often requires an external oil storage device, which is large in size and high in weight.

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