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Spiral multi-section combined type sealing labyrinth

A grate-tight, helical-type technology, applied in the machine/engine, leakage prevention, mechanical equipment and other directions, can solve the problems of reducing the transition state performance of the whole machine, reducing the stability margin of the compression system, etc., and achieve great military application value, The effect of increasing the combat radius and increasing security

Inactive Publication Date: 2015-09-23
赵军
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At the same time, at high speed, high bleed air volume will also reduce the stability margin of the compression system, thereby reducing the transition state performance of the whole machine

Method used

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  • Spiral multi-section combined type sealing labyrinth
  • Spiral multi-section combined type sealing labyrinth
  • Spiral multi-section combined type sealing labyrinth

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0016] in figure 1 It is a schematic diagram of the traditional sealing grate structure. The rotating shaft 1 is processed with ordinary grate teeth 4, which together with the stationary ring surface 3 form a sealing surface to isolate the high-pressure air chamber 2 and the lubricating oil chamber 5.

[0017] Such as figure 2 As shown, the present invention provides a spiral multi-section combined sealing grate structure, which includes a rotating shaft 1 with a common grate 4 and a stationary ring surface 3, and the left and right sides of the common grate 4 are respectively provided with left sections The spiral grate teeth 6 and the right spiral grate teeth 7, the left spiral grate teeth 6 and the right spiral grate teeth 7 have opposite directions of rotation, and the stationary ring surface 3 is close to the left spiral grate Teeth 6, right section s...

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Abstract

The invention belongs to rotary sealing devices, and particularly relates to a device which can prevent labyrinth seal structure media from being leaked. The device is particularly applied to the fields of aero-engines, combustion gas turbines and steam turbines. The invention provides a spiral multi-section combined type sealing labyrinth which can improve the sealing effect at all the rotating speed stages and lower the requirement for the air entraining content of a compressor outlet. The spiral multi-section combined type sealing labyrinth comprises a rotating shaft with common labyrinth bodies and a static ring face. The left side and the right side of the common labyrinth bodies are provided with left section spiral labyrinth bodies and right section spiral labyrinth bodies respectively. The rotating direction of the left section spiral labyrinth bodies is opposite to the rotating direction of the right section spiral labyrinth bodies. The static ring face abuts against the common labyrinth bodies, the left section spiral labyrinth bodies and the right section spiral labyrinth bodies to form a sealing face. The spiral multi-section combined type sealing labyrinth has the beneficial effects that a traditional sealing labyrinth is optimized to be the spiral multi-section combined type sealing labyrinth, so that the sealing effect is improved at all the rotating speed stages, and meanwhile the requirement for the air entraining content of the compressor outlet is lowered.

Description

technical field [0001] The invention belongs to a rotary sealing device, and in particular relates to a device for preventing medium leakage of a grate tooth sealing structure, and is especially applied in the fields of aeroengines, gas turbines and steam turbines. Background technique [0002] In various industrial installations, the sealing grate has been widely used as an important sealing element, and its sealing performance also greatly affects the performance of the equipment. [0003] Grate seal is an effective and long-life non-contact sealing structure widely used in gas turbines, such as the top of compressor blades and turbine blades, cooling in flow path systems, gas isolation, and bearing cavity lubricating oil sealing systems Oil and gas isolation, etc. Grate seals have a significant impact on the performance, reliability, life and maintenance of gas turbines. Engine failures and accidents often occur due to sealing problems. With the improvement of gas turbin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01D11/00
Inventor 赵军
Owner 赵军
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