Sparking plug bush with cooling structure

A cooling structure and bushing technology, which is applied in the field of motor nozzle bushings of engines, internal combustion engines, and gas turbines, can solve problems that cannot be solved, and achieve the effects of convenient installation, simple structure, and guaranteed reliability

Pending Publication Date: 2021-11-19
中国航发贵阳发动机设计研究所
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this solution cannot solve the ablation problem caused by the recirculation zone caused by the fuel in the combustion chamber flowing through the cylindrical structure of the anode when the combustion chamber is working.

Method used

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  • Sparking plug bush with cooling structure

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Embodiment Construction

[0019] The technical solution of the present invention is further described below, but the scope of protection is not limited to the description.

[0020] Such as figure 1 Shown is the structural representation of the present invention:

[0021] The invention provides a nozzle bushing with a cooling structure, which includes a mounting section 2, an air guide groove 3 is provided in the middle of the outer side of the installation section 2, and the air guide groove 3 is ring-shaped, and the outer side of the lower part of the installation section 2 is transversely A cooling gap 4 is opened, and an oblique cooling hole 5 is provided at the lower part of the air guide groove 3 , and the other end of the cooling hole 5 communicates with the inside of the cooling gap 4 .

[0022] When in use, the installation section 2 is welded on the flame tube 1, and there is a gap between the igniter 9 and the nozzle bushing, so the distance between the lower end of the igniter 9 and the low...

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PUM

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Abstract

The invention provides a sparking plug bush with a cooling structure. The sparking plug bush comprises a mounting section, wherein an annular air guide groove is formed in the middle of the outer side of the mounting section, and a cooling gap is transversely formed in the outer side of the lower portion of the mounting section; an inclined cooling hole is formed in the lower portion of the air guide groove; and the other end of the cooling hole communicates with the inner side of the cooling gap. The sparking plug bush is simple in structure and convenient to install; the fact that the mounting position of an igniter is not changed in the working process of a combustion chamber can be guaranteed; cooling air passes through the air guide groove, the cooling hole and the cooling gap to form an air film section to protect flame tube walls at the lower end and the rear side of the igniter, and the working reliability of the igniter is guaranteed; and the wall surface temperature of a flame tube is within an allowable range, so that no ablation is generated. The cooling gap is positioned on the rear side of the mounting section, and the length of the cooling gap is less than half of the perimeter of the mounting section. An inward convergence part is arranged on the inner wall of the lower portion of the rear side of the mounting section.

Description

technical field [0001] The invention relates to the technical field of electric nozzle bushings for engines, internal combustion engines and gas turbines, in particular to an electric nozzle bushing with a cooling structure. Background technique [0002] The combustion chambers of aero-engines, internal combustion engines and gas turbines all need to be ignited by an igniter. In order to ensure reliability and safety, the lower end of the igniter needs to go deep into the flame tube. In order to avoid the burning of the lower end of the igniter, the lower end of the igniter is generally protected by a nozzle bushing or a cooling hole on the flame tube. When the combustion chamber is working, the rear edge of the igniter or the nozzle bushing has a cylindrical structure at its lower end. When the gas in the flame tube flows through, a turbulent recirculation zone will be formed on the rear side of the cylindrical structure. Because the flame tube The internal temperature is ...

Claims

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Application Information

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IPC IPC(8): F02C7/266F02C7/18
CPCF02C7/266F02C7/18
Inventor 卢铭涛冯雯翠于小兵伍祥瑞
Owner 中国航发贵阳发动机设计研究所
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