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Axial forward-moving and radial slanting reverse-vane angle-direction seam processing box

A technology for processing casings and anti-blades, which is applied to mechanical equipment, machines/engines, liquid fuel engines, etc., can solve problems such as reducing compressor pressure ratio and efficiency, and compressor blade breakage, so as to reduce efficiency loss and stabilize margins. The effect of increasing the speed and improving the stability expansion ability

Inactive Publication Date: 2017-07-21
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the compressor is in an unstable working condition, it will not only reduce the pressure ratio and efficiency of the compressor, but also generate strong vibration, and even cause the compressor blades to break

Method used

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  • Axial forward-moving and radial slanting reverse-vane angle-direction seam processing box
  • Axial forward-moving and radial slanting reverse-vane angle-direction seam processing box
  • Axial forward-moving and radial slanting reverse-vane angle-direction seam processing box

Examples

Experimental program
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Effect test

Embodiment Construction

[0017] see Figure 1-Figure 6 , a subsonic axial flow compressor based on radially inclined anti-blade angular slot processing casing, which is characterized in that it includes the following steps:

[0018] Step 1: Open a certain number of seams on the compressor casing along the angle α with the axial direction 1 and arrange them evenly along the circumferential direction 2 to form the anti-blade angular seam processing casing 3, and the anti-blade angular seam processing casing 3 The processing width covers the axial chord length of the entire blade tip 6;

[0019] Step 2: Move the anti-blade angular seam processing casing 3 forward by a certain distance along the axial direction 1. The forward movement here is the choice made by comparison after numerical simulation. At the same time, it is inclined at a certain angle β along the radial direction to form a new handle casing 8;

[0020] Step 3: The slit width is 3.5mm, the ratio of the slit width to the slit width is 0.5,...

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Abstract

The invention discloses an axial direction moving forward and radial direction slanting reverse-vane angle-direction seam type processing engine box. A certain number of seams are formed in a gas compressor box in the direction which forms an included angle with the axial direction and are evenly distributed in the circumference direction to form the reverse-vane angle-direction seam type processing engine box, and the included angle is 37.1 degrees. The processing width of the reverse-vane angle-direction seam type processing engine box covers the axial chord length of a total vane top. On the basis of the reverse-vane angle-direction seam type processing engine box, axial forward moving is further conducted by 10 mm, and radial slanting is conducted by 60 degrees, stability margin of a gas compressor is further improved, and meanwhile, loss of compression ratios and efficiency is reduced. A comparison research is carried out on a subaudio axial flowing gas compressor rotor test table, one is a reverse-vane angle-direction seam type processing engine box, and the other is the newly formed radial direction slanting reverse-vane angle-direction seam type processing engine box. The result shows that compared with the reverse-vane angle-direction seam type processing engine box, the newly formed processing engine box further improves comprehensive stall margin and reduces efficiency loss at the same time.

Description

technical field [0001] The invention relates to a device for improving the stability margin of an axial flow compressor, in particular to a radially inclined and axially inclined slotted processing casing. Background technique [0002] In actual work, the compressor does not always work under the design conditions. When the operating conditions change, its operating point will deviate from the design operating point, and under certain conditions, unstable flows such as stall and surge will occur. When the compressor is in an unstable working condition, it will not only reduce the pressure ratio and efficiency of the compressor, but also generate strong vibration, and even cause the blades of the compressor to break. For this reason, researchers at home and abroad are actively exploring measures to expand the stable working range of compressors. As an effective measure to expand stability, treating the casing has the characteristics of simple structure and easy modification...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/64
CPCF04D29/644
Inventor 张皓光安康谭锋张旭东楚武利
Owner NORTHWESTERN POLYTECHNICAL UNIV
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