Non-contact type gas seal device
A gas-sealing, non-contact technology that is applied to engine seals, engine components, and mechanical equipment. It can solve the problems of complex mechanical seal structures, limited pressure resistance, and short life.
Inactive Publication Date: 2013-04-03
SOUTHEAST UNIV
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Problems solved by technology
The structure of the mechanical seal is complex, it is difficult to achieve high-speed operation, and the service life is short, which reduces the precision of the spindle rotation. It can only be used in low-speed occasions, and due to improper packing quality and cooling, it is easy to overheat, and the floating ring seal requires a complex auxiliary sealing system, which increases technical complexity and equipment costs
Method used
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Embodiment Construction
[0011] The present invention will be further described below in conjunction with the accompanying drawings.
[0012] see figure 1 , the non-contact gas sealing device provided by the present invention is used for the non-contact gas end face of the rotating shaft, which includes the first rotating shaft 1, the first gas sealing end cover 2, the first rotating shaft 1 is a hollow shaft, and A first gas-tight end cover 2 is installed on the shaft end surface of a rotating shaft 1 , and a first gas passage 3 is arranged on the first gas-tight end cover 2 .
[0013] The end face of the first gas-tight end cover 2 close to the first rotating shaft 1 is provided with a first concave ring 5 for connecting the first gas-tight end cover 2 and the first rotating shaft 1 close to the first gas-tight end cover 2 A complete sealing surface is formed in the gap between the ends.
[0014] The end face of the shaft end of the first rotating shaft 1 close to the gas-tight end cover 2 is .
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The invention relates to a non-contact type gas seal device which is characterized by comprising a pair of rotation shafts (1) which are matched with each other and gas seal end covers (2), wherein each gas seal end cover (2) is provided with a gas inlet, each rotation shaft (1) is a hollow shaft, the gas seal end covers (2) are arranged on the shaft end surfaces of the rotation shafts (1), the end surfaces of the gas seal end covers (2) close to the rotation shafts (1) are provided with gas outlets, and the gas seal end covers (2) are also provided with gas passages (3) from the gas inlets to the gas outlets. The device solves the problem that a fluid with larger pressure leaks in the process of passing through the hollow rotation shafts. Moreover, because of no contact, the frictional power loss is almost zero, the service life is infinitely long, and the rotation precision of a rotor can not be reduced.
Description
technical field [0001] The invention relates to a new type of end face non-contact gas sealing technology of a rotating shaft, which belongs to the technical field of mechanical design sealing. Background technique [0002] In high-speed rotating machinery, hollow shaft parts have been widely used and pressure fluid is introduced, such as high-speed precision grinding electric spindles for crystal processing, aero-engine spindles, etc., which urgently require high-performance rotating shafts Face sealing technology. The existing shaft end dynamic sealing technologies include: mechanical seals, labyrinth seals, screw seals, packing seals, floating ring seals, etc. The structure of the mechanical seal is complex, it is difficult to achieve high-speed operation, and the service life is short, which reduces the precision of the spindle rotation. It can only be used in low-speed applications, and due to improper packing quality and cooling, it is easy to overheat, and the float...
Claims
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IPC IPC(8): F16J15/40
Inventor 蒋书运徐春冬
Owner SOUTHEAST UNIV