Vacuum chamber connecting device used for air cannon

Abstract

The invention discloses a vacuum chamber connecting device used for an air cannon. Seal devices are arranged between the vacuum chamber connecting device and an air cannon barrel as well as between the vacuum chamber connecting device and a vacuum chamber respectively. An air extraction hole is formed in a vacuum chamber air extraction tube body, an air flow deflection tube body is provided with an exhaust hole communicated with the vacuum chamber air extraction tube body, the air extraction hole is connected to a vacuum pump, and a separating device is arranged in a sabot separator piston tube body. A sabot separator piston is provided with a separation opening used for clamping a sabot and labyrinths used for sealing the sabot separator piston and the sabot separator tube body. The sabot is clamped in the separation opening and located between the sabot separator piston tube body and the air flow deflection tube body to seal the sabot separator piston tube body. The seal ring is arranged, the sabot is clamped in the separation opening to seal the sabot separator tube body, and the labyrinths are arranged on the sabot separator piston, so that sealing of the vacuum chamber connecting device used for the air cannon is achieved, the sealing effect is good, the structure is simple, and assembly and disassembly are easy.

Description

technical field [0001] The invention relates to the field of air cannon firing tests, in particular to a vacuum chamber connection device for an air cannon. Background technique [0002] In the research process of aero-engine anti-foreign object damage, it is necessary to use air cannons to launch foreign objects such as birds and ice, and carry out impact tests on engine rotating components, including fans, compressor rotors, etc. When there is a large aerodynamic resistance, the energy consumption is huge, and under normal circumstances, due to the effect of atmospheric back pressure, the launch speed of the air cannon is difficult to exceed the speed of sound. Therefore, the relevant tests are mostly carried out in a vacuum chamber, that is, by extracting the air, the influence of aerodynamic resistance is eliminated, and the gun speed is increased to a certain extent. However, the current connection device between the air cannon and the vacuum chamber is complicated in d...

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Problems solved by technology

Therefore, the relevant tests are mostly carried out in a vacuum chamber, that is, by extracting the air, eliminating the influence of aerodynamic resistance, and increasing the gun speed to a certain extent, but the current design of the connection device between the air cannon and the vacuum chamber is complicated, difficult to install, and the sealing effect is not good. good

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