Pneumatic ball valve for hypervelocity wind tunnel throat and processing method of pneumatic ball valve

Abstract

The invention discloses a pneumatic ball valve for a hypervelocity wind tunnel throat and a processing method of the pneumatic ball valve. When the pneumatic ball valve is opened, axisymmetric profilechannels are formed among central through holes of a left end cover, a ball core and a right end cover, and the axisymmetric profile channels are in smooth transition with the throat profile and arepart of the throat profile. The processing method of the pneumatic ball valve comprises the steps: a. processing a solid first pneumatic ball valve according to the size of the hypervelocity wind tunnel throat; b. opening and fixing the solid first pneumatic ball valve to obtain a solid second solid pneumatic ball valve; c. mounting the solid second pneumatic ball valve on the hypervelocity wind tunnel throat; and d. integrally processing the solid second pneumatic ball valve with the hypervelocity wind tunnel throat to obtain the pneumatic ball valve with the axisymmetric profile channels. The pneumatic ball valve can quickly stop the throat and prevent driving gas from scouring a sensor; and the driving gas and test gas can be effectively separated, and the reuse of the driving gas is convenient. The processing method of the pneumatic ball valve has the advantages of integrity, high machining precision and good consistency with the profile of the hypervelocity wind tunnel throat.

Description

technical field

[0001] The invention belongs to the technical field of ultra-high-speed wind tunnel tests, and in particular relates to a pneumatic ball valve for an ultra-high-speed wind tunnel throat and a processing method thereof. Background technique

[0002] In the ultra-high-speed wind tunnel test, after the test gas passes through the throat, it is necessary to use a pneumatic ball valve to quickly cut off the test gas on the channel to prevent the test gas from passing through the throat to cause erosion of the test model and sensor, and to improve the service life and maintenance of the test sensor. completeness of the model. However, at present, ultra-high-speed wind tunnels adopt an integral throat design, and it is not possible to prevent the driving gas from scouring the test model and sensors by means of a quick cut-off on the throat. ball valve. Contents of the invention

[0003] One technical problem to be solved by the present invention is to provide a ...

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