Prerotation guide vane pipeline structure with variable-cross-section end wall
A variable cross-section and pipeline technology, which is applied to non-variable pumps, pump control, components of pumping devices for elastic fluids, etc., can solve the problems of narrowing of the stable flow range of the booster and decreasing efficiency, etc. To achieve the effect of performance improvement and fast performance adjustment
Pending Publication Date: 2022-01-18
CHINA NORTH ENGINE INST TIANJIN
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Problems solved by technology
[0004] In view of this, the present invention aims to propose a variable cross-section end wall pre-rotation guide vane pipeline structure to solve the problems of narrowing the stable flow range of the turbocharger and reducing efficiency due to complex transonic shock waves and vortex flow separation.
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[0024] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0025] In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be interpreted...
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The invention provides a prerotation guide vane pipeline structure with a variable-cross-section end wall. The structure comprises a variable-cross-section pipeline body and a plurality of prerotation guide vanes arranged in the variable-cross-section pipeline body, the prerotation guide vanes are evenly distributed in the radial direction of the inner wall of the variable-cross-section pipeline body, the first end of each prerotation guide vane is fixedly connected to the inner side wall of the variable-cross-section pipeline body, and the second end of each prerotation guide vane is provided with an outlet vane angle. According to the prerotation guide vane pipeline structure with the variable-cross-section end wall, the variable-cross-section structure can adjust the flow of air passing through the prerotation guide vanes under different flows while controlling the air inlet flow of an air compressor, forming air inlet prerotation, improving an inlet flow field structure, widening the stable working range of the air compressor and improving the working efficiency, and different prerotation effects under different flows are formed, so that the incoming flow requirements of the air compressor under different flows are better matched, and one-way adjustment is conducted on a surge line or a blocking line of the performance of the air compressor.
Description
technical field [0001] The invention belongs to the technical field of exhaust gas turbocharging, and in particular relates to a variable-section end wall pre-rotation guide vane pipeline structure. Background technique [0002] The requirements of high power density and plateau power recovery of internal combustion engines require continuous improvement and optimization of the performance of the supercharging system, so that the supercharging system can be well matched with the engine. With the continuous increase of the boost pressure ratio, the Mach number at the impeller inlet is continuously increased, and the internal flow of the centrifugal compressor is transformed into a transonic flow structure. The complex transonic shock wave, vortex flow separation, etc. narrow the stable flow range of the supercharger and reduce the efficiency. The structure of the inlet flow field, especially the distribution of the inlet angle of attack, has a decisive influence on the perfo...
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IPC IPC(8): F04D29/46F04D27/00F04D27/02F02B37/24
CPCF04D29/462F04D27/002F04D27/0246F02B37/24Y02T10/12
Inventor 刘欣源佟鼎王宪磊肖维侯琳琳张子磊林森
Owner CHINA NORTH ENGINE INST TIANJIN