Seal joint for pressurized wind tunnel

Abstract

The invention discloses a seal joint for a pressurized wind tunnel. The seal joint comprises a base, a pressing screw and seal washers. The base is connected to the wall of the pressurized wind tunnel in a welded mode, a cable penetrates through a central through hole of the pressing screw, a central through hole of the base and central through holes of the seal washers, the five overlaid seal washers are located between the pressing screw and the base, mechanical extrusion formed by tightening force of threads for connection between the pressing screw and the base enables the seal washers to deform, hold the cable tightly, and meanwhile extrude an inner cavity of the base tightly, and seal problems caused when the cable passes through the wall of the pressurized wind tunnel. By the adoption of an embedded type seal joint design mode, contradiction between communication and seal is effectively overcome; by using the characteristics that the seal washers are high in elasticity and toughness, the technical problem that a traditional seal joint cannot be used under a dynamic pressure condition, and reliable and rapid connection of the measurement and control cable in the pressurized wind tunnel is achieved. The seal joint has a wide pressure resistant range and good airtightness and insulativity, and can be used repeatedly and installed rapidly.

Description

technical field [0001] The invention relates to a sealing joint, in particular to a sealing joint used in a pressurized wind tunnel. The invention belongs to the technical field of pressure vessel sealing. Background technique [0002] The pressurized wind tunnel is a commonly used equipment in scientific research and production, especially in the fields of aerospace, architectural design, and automobile manufacturing. As a dynamic pressure vessel, the supercharged wind tunnel not only has a relatively high pressure in the wind tunnel during operation, but also its pressure changes with the change of airflow velocity. Therefore, the sealed lead wire of the supercharged wind tunnel The problem has always been one of the technical difficulties in engineering applications. Whether it is static or dynamic, there is always a certain pressure difference inside and outside the wind tunnel. In order to maintain the pressure in the tunnel, physical isolation must be carried out, wh...

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Problems solved by technology

[0004] In order to avoid the deficiencies of the existing technology and overcome the problem that the traditional sealing joint is easy to loosen and leak air due to the action of dynamic pressure in the sealing lead of the pressurized wind tunnel, or even fail, and it is difficult to install and disassemble; the present invention proposes a Sealed joints for pressurized wind tunnels

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