An adjustable channel rotating shaft dynamic sealing structure
A technology of dynamic sealing structure and rotating shaft, which is applied in the direction of engine sealing, pivot, pivot connection, etc., and can solve the problems of engine energy management, quality/space requirements, and increased driving force requirements, etc., where the output force of the drive device is limited , to achieve the effect of reducing output force requirements and space requirements, and effectively increasing the force arm
Active Publication Date: 2021-10-12
BEIJING POWER MACHINERY INST
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On the other hand, the output force of the driving device is limited by the engine energy management and mass / space requirements, and the driving force requirement cannot be increased without limit for "absolute" sealing
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[0025] In order to make the purpose, content and advantages of the present invention clearer, the specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.
[0026] First, the basic form of the geometric adjustment of the intake port is described. Such as figure 1 The geometric adjustment shown mainly presents fixed axis rotation and lifting translation, and the flow channel profile is represented by a two-dimensional cross section, where: (1) 1 profile-O 1 A 1 at O 1 Hinge connection with other flow channel structures of the engine, so that the profile can be wound around O 1 turn to O 1 A 2 Location;
[0027] (2) Type 2-B 1 C 1 , 3-type surface-C 1 D, Type 4-DE and Type 5-B 1 The four profiles of E are characterized by parallelograms, and each profile is connected by hinges in turn. If the profile DE is used as a reference for relative motion, the profile 3, prof...
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The invention discloses an adjustable flow channel rotating shaft dynamic sealing structure. The flow channel is an air inlet, and the air inlet includes: an outer compression surface, a side plate, a lip plate, a bottom plate of an inner compression section, and a boundary layer suction The removal channel, the front wall of the suction chamber, the lower wall of the suction chamber, the rear wall of the suction chamber, the side wall of the suction chamber, and the outlet of the suction chamber; a boundary layer suction channel is designed on the bottom plate of the inner compression section, so that the inner The low-energy fluid in the boundary layer around the bottom plate of the compression section is discharged from the inner channel of the intake duct through the absorption channel of the boundary layer; the lower part of the bottom plate of the inner compression section is provided with a closed cavity of the suction chamber, and is discharged from the inner channel of the intake duct through the absorption channel of the boundary layer Low-energy fluid enters the suction chamber enclosure and exits the engine. The present invention can effectively increase the force arm of the driving rod for the wall surface of the engine flow channel with binary or nearly binary characteristics, and reduce the output force and space requirements of the driving device.
Description
technical field [0001] The invention belongs to the technical field of air-breathing ramjet engines, and relates to an adjustable flow channel rotating shaft dynamic sealing structure. Background technique [0002] The adjustable intake port is an effective technical way to realize wide Mach number multi-mode working engine working in wide area and "multi-point" performance optimization. Relying on the adjustable inlet scheme represented by throat adjustment, it has the characteristics of wide adaptability and moderate structural realization cost. It is necessary to propose an adjustment structure scheme that takes both flow control and adjustment cost into consideration for such adjustment requirements. [0003] First, the adjustable flow channel solution needs to introduce a dynamic sealing solution to cut off the passage of high-temperature and high-pressure airflow in the flow channel channel into the accessory cavity, so as to avoid the problem that the equipment in the...
Claims
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IPC IPC(8): F16J15/16F16C11/04F02C7/042F02C7/236
CPCF02C7/042F02C7/236F16C11/045F16J15/16
Inventor 国兆普杜江毅刘胜满延进朱守梅
Owner BEIJING POWER MACHINERY INST