A high-speed sealing test bench for a dual-shaft counter-rotating engine and a detection method thereof

Abstract

The application discloses a double-shaft counter-rotating engine high-speed sealing test bench and a detection method thereof. The test bench comprises two electric main shafts which are oppositely arranged and coaxially arranged. A low-temperature cavity is sealingly arranged on one electric main shaft, and a stable-pressure cavity and a high-temperature cavity are sealingly arranged on the other electric main shaft. The tail ends of the two electric main shafts are respectively connected with a graphite sealing ring assembly and a metal dynamic ring in a test piece. The graphite sealing ring in the graphite sealing ring assembly and the metal dynamic ring are coaxially arranged and the end faces can be attached. The rotating directions of the rotating shafts of the two electric main shafts are opposite. The test piece is located in the high-temperature cavity. The test bench can comprehensively simulate the working environment of the flexible graphite sealing ring, provide sealing detection of the graphite sealing ring under the super-high rotating speed condition, can be applied to more kinds of rotating speed test ranges, and can directly measure the leakage of the test piece. The double-shaft relative rotation reduces the rotating speed requirement of the motor, has good economic applicability, and the sealing detection method is more convenient and fast.

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