Inflatable and deflated double-layer sealing structure and gas spring

Abstract

The invention belongs to the field of sealing vibration isolation, and particularly discloses a double-layer sealing structure capable of being inflated and deflated and a gas spring. The double-layersealing structure comprises a gas nozzle body, an inner sealing unit and an outer sealing unit; the inner sealing unit comprises an elastic gas nozzle with a hole and a stopping block with a hole, the elastic gas nozzle is arranged on the side, close to compressed gas, of the gas nozzle body, the stopping block with the hole is arranged in the gas nozzle body, and a first sealing sheet with a hole is arranged between the stopping block with the hole and the elastic gas nozzle; the outer sealing unit comprises a threaded fastening part, the threaded fastening part is arranged on the side, faraway from the compressed gas, of the gas nozzle body, and a second sealing sheet with a hole is arranged between the threaded fastening part and the stopping block with the hole in the inner sealing unit; and the gas spring comprises the double-layer sealing structure and a flexible gas bag. The double-layer sealing structure has the advantages that the gas tightness is good, inflating and deflating can be achieved, and no gas leakage phenomenon is generated.

Description

technical field [0001] The invention belongs to the field of sealing and vibration isolation, and more specifically relates to a double-layer sealing structure and a gas spring that can be inflated and deflated. Background technique [0002] Vibration problems generally exist in various fields of industrial production and engineering. With the development of various mechanical equipment towards high speed, high precision and high stability, their requirements on vibration are becoming more and more stringent. Therefore, it is necessary to use the shock absorber to isolate the transmission of the power device to its fixed support, or to use the shock absorber to isolate the transmission of the vibration of the mechanical structure to the relevant instrument device. [0003] There are many forms of shock absorbers, such as metal springs, rubber structures, metal-rubber composite structures, gas springs, magnetic springs, etc. A gas spring is a non-metallic spring that fills a...

AI Technical Summary

Problems solved by technology

First, it is sealed with a structure such as a sealed gas nozzle, which is generally poor in airtightness, resulting in the inevitable slow gas leakage of the gas spring during long-term use, which will affect the vibration damping performance. and positional stability degradation

Second, the sensor, valve structure and control system are used to control the air supply and exhaust of the gas spring in real time, which can accurately control the position and air pressure of the gas spring, but it will increase the complexity of the vibration damping system and reduce the performance of the vibration damping system. Reliability greatly limits its application in many fields

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