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Used for compressor/fan stator sealing and suction control angle area separation structure

A technology of fan stator and separation structure, which is applied to machines/engines, components of pumping devices for elastic fluids, mechanical equipment, etc. Sealing effect, performance-enhancing effect

Inactive Publication Date: 2016-08-10
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This separation zone has a large adverse effect on the compressor / fan stability margin and efficiency

Method used

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  • Used for compressor/fan stator sealing and suction control angle area separation structure
  • Used for compressor/fan stator sealing and suction control angle area separation structure
  • Used for compressor/fan stator sealing and suction control angle area separation structure

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Embodiment Construction

[0014] Outer case 1: directs the air flow and is used to mount the stator. Stator blade 2: change the direction of air flow and increase the gas pressure. Stator inner ring 3: connect the stator blades of the cantilever structure into one body to increase the overall rigidity of the stator. Sealing grate teeth 4: prevent airflow from flowing into the sealing blade 5 from upstream. Sealing blade 5: when rotating, it generates a force against the direction of leakage flow, and the low-speed fluid on the surface of the blade and the boundary layer of the lower ring wall is sucked out through the suction ring groove 7 excavated on the inner ring of the stator to suppress the angle of the stator zone separation, and at the same time prevent the backflow of high-pressure gas at the outlet of the stator (that is, to play a sealing role); the shape design of the sealing blade 5 adopts the conventional compressor blade design method, and the specific steps are as follows: ① Firstly, t...

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Abstract

The utility model relates to a separation structure for the sealing of the stator of the compressor / fan and the separation of the air suction control angle, which belongs to the technical field of impeller machinery. The compressor / fan includes an outer casing (1), a stator blade (2), and a rotating drum (6); one end of the stator blade (2) is installed on the outer casing (1): the feature is that: the The other end of the stator vane (2) is connected by the stator inner ring (3); the rotating drum (6) is respectively installed with sealing grate teeth (4) and sealing blades (5) along the circumferential direction, wherein the sealing The tight grate teeth (4) are located upstream of the seal blades (5); there is a seal gap between the seal grate teeth (4), the seal blades (5) and the inner ring of the stator (3) to avoid static and rotational friction ; On the stator inner ring (3), there is a suction ring groove (7) at the corresponding position between the sealing grate teeth (4) and the sealing blades (5). The invention can improve the sealing effect and control the separation of the corner area of ​​the stator, thereby improving the performance of the compressor / fan.

Description

technical field [0001] The invention relates to a separation structure for sealing and suction control corners of a compressor / fan stator, which belongs to the technical field of impeller machinery. Background technique [0002] For gas turbine engines and gas turbines, axial flow compressor / fan stator blades often have a large separation zone near the outlet root angle, which is called corner separation. This separation zone has a large adverse effect on the compressor / fan stability margin and efficiency. [0003] In November 2010, Xu Pengfei, Zhao Bin, and Liu Baojie published the paper "Aerodynamic Design and Numerical Verification of High-Load Fans" in the Journal of Aerodynamics, Volume 25, Issue 1. Boundary layer absorption technology was used to solve the separation of stator corners. [0004] Zhou Zhenggui and Zhang Yihao applied for the invention patent "blade type non-leakage sealing device" (patent application number: 201310540014.8), which proposes a blade type ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F04D29/08
Inventor 周正贵崔翠迟雪
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS