CN220929534U - Ignition electric nozzle with multiple firing ends - Google Patents

Abstract

The utility model relates to the technical field of engine ignition devices, in particular to an ignition electric nozzle with a multiple firing end; comprises a fixed end and an ignition end; the ignition end is provided with a plurality of ignition assemblies; the conductive ends of the ignition assemblies penetrate through the shell of the fixed end and are connected with the adapter arranged inside the shell, and the ignition ends of the ignition assemblies face different directions to form multiple ignition ends. According to the utility model, the ignition electric nozzle can ignite at multiple angles by arranging the plurality of ignition assemblies facing different directions, and the oil-gas mixture in the combustion chamber of the engine is ignited in a shorter time, so that the stability of the ignition device is improved.

Description

Ignition electric nozzle with multiple firing ends

Technical Field

The utility model relates to the technical field of aeroengine ignition devices, in particular to an ignition electric nozzle with a multiple firing end.

Background

After the aeroengine is flameout at high altitude, the temperature and the pressure in the combustion chamber drop sharply, and certain influence is caused on links such as atomization, evaporation, ignition, flame propagation and the like of fuel oil, so that the restarting of the engine at high altitude faces great challenges.

At present, a single firing end structure is mainly used for an aeroengine firing nozzle, and the firing core area of the type of firing nozzle is small, long in time and poor in reliability. For example: under the conditions of low temperature and low air pressure, the product is difficult to capture a reflux area with high oil-gas ratio during working, and a certain risk exists. Also for example: the differences in the size, shape, spray location, etc. of the combustion chambers of different engines result in differences in the concentration of the gas-oil mixture within the combustion chambers.

Therefore, aiming at the current situation that the stability of the ignition electrode nozzle with a single ignition end in the prior art is poor, the structure of the ignition electrode nozzle needs to be optimally designed.

Disclosure of utility model

Aiming at the current situation that the ignition electric nozzle with a single firing end has poor stability in the prior art, the utility model provides the ignition electric nozzle with a plurality of firing components facing different directions, so that the ignition electric nozzle can perform multi-angle ignition, and the oil-gas mixture in the combustion chamber of the engine can be ignited in a shorter time, thereby improving the stability of the ignition device.

The utility model has the following specific implementation contents:

an ignition electrode nozzle with a plurality of ignition ends comprises a fixed end and an ignition end; the ignition end is provided with a plurality of ignition assemblies;

The conductive ends of the ignition assemblies penetrate through the shell of the fixed end and are connected with the adapter arranged in the shell, and the ignition ends of the ignition assemblies face different directions to form multiple ignition ends;

An insulating sleeve, a conductive main rod and a contact nut are further arranged in the shell of the fixed end; the conductive main rod, the contact nut and the shell are sequentially sleeved from the center to the periphery, the rear end of the conductive main rod is connected with the contact nut, and the front end of the conductive main rod is connected with the adapter.

To better implement the utility model, the firing assembly comprises a firing housing, a porcelain tube, a second bushing, a firing conductor rod, and a center electrode;

The ignition shell is sleeved outside the porcelain tube through the second bushing, the central electrode and the ignition conducting rod are connected in an axial mode and then sleeved in the porcelain tube, the front end of the central electrode stretches into an ignition cavity arranged at the front end of the ignition shell, and the tail end of the ignition conducting rod is electrically connected with the conducting main rod through the adapter.

In order to better realize the utility model, the shell of the fixed end consists of a first shell and a second shell; the insulating sleeve of the fixed end consists of a first insulating tube and a second insulating tube; the fixed end is also provided with a first bushing;

The first insulating tube is sleeved in the first shell to form a first section of fixing part; the second insulating tube is sleeved in the second shell to form a second section fixing part; after the first section fixing part, the second section fixing part and the ignition assembly are sequentially connected, the first shell, the second shell and the ignition shell are connected into a whole, and the first insulating tube, the second insulating tube and the porcelain tube are connected into a whole; the first bushing is mounted at the tail end of the first housing for securing the insulating sleeve within the housing.

In order to better realize the utility model, the fixed end is also provided with a gasket; the first bushing defines the first bushing through the gasket.

In order to better realize the utility model, the main bodies of the first shell and the second shell are of thin-wall cylindrical structures, one is provided with an annular concave part, the other is provided with an annular convex part, and the first shell and the second shell are fixedly connected into a whole after being combined through the annular concave part and the annular convex part which are mutually sleeved.

In order to better realize the utility model, the annular concave part and the annular convex part are sleeved to form a limiting end face facing the tail end of the first shell; the tail end of the second insulating tube is provided with a circular boss, and the circular end face of the boss is in abutting and limiting connection with the limiting end face.

In order to better realize the utility model, the adapter is provided with an internal threaded hole for being in threaded connection with the ignition conducting rod; the number of the internal threaded holes is consistent with that of the ignition components, and the axial directions of the internal threaded holes are mutually acute angles.

In order to better realize the utility model, the number of the ignition conducting rods and the central electrode in one ignition assembly is one, and the central electrode is welded at the front end of the ignition conducting rod.

In order to better realize the utility model, the whole contact nut is of a stepped cylindrical structure; external thread sections are respectively arranged at two ends of the conductive main rod, and the conductive main rod is respectively in threaded connection with the contact nut and the adapter through the external thread sections.

The utility model has the following beneficial effects.

(1) The ignition electric nozzle with the multiple ignition ends can ignite from multiple angles and ignite the oil-gas mixture in the combustion chamber of the engine in a shorter time, so that the ignition electric nozzle with the multiple ignition ends can be suitable for engines with different combustion chamber sizes, shapes and spray positions.

(2) The ignition electric nozzle with the multiple ignition ends disclosed by the utility model has the advantages that a plurality of ignition assemblies work simultaneously during ignition, and the ignition energy is larger compared with the ignition electric nozzle with a single ignition end.

(3) The ignition electric nozzle with the multiple firing ends can start an engine in a short time, so that the service life is longer.

Drawings

Fig. 1 is a schematic view of the structure of an ignition plug provided with three ignition modules in embodiment 3.

Fig. 2 is a schematic structural view of the three ignition assemblies of fig. 1 connected to the conductive main rod through the adapter.

Fig. 3 is a schematic view of the ignition nozzle of fig. 1 in partial cross-section.

Fig. 4 is a schematic cross-sectional view of an ignition assembly.

Wherein: 100. a fixed end; 200. a firing end; 210. a firing assembly;

1. A first housing; 2. a second housing; 3. a first insulating tube; 4. a second insulating tube; 5. a first bushing; 6. a gasket; 7. a contact nut; 8. a conductive main rod; 9. an adapter; 211. an ignition housing; 212. porcelain tube; 213. a second bushing; 214. an ignition conducting rod; 215. a center electrode.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it should be understood that the described embodiments are only some embodiments of the present utility model, but not all embodiments, and therefore should not be considered as limiting the scope of protection. All other embodiments, which are obtained by a worker of ordinary skill in the art without creative efforts, are within the protection scope of the present utility model based on the embodiments of the present utility model.

In the description of the present utility model, it should be noted that, unless explicitly stated and limited otherwise, the terms "disposed," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; or may be directly connected, or may be indirectly connected through an intermediate medium, or may be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Example 1:

the embodiment provides an ignition electrode nozzle with a multiple firing end, which comprises a fixed end 100 and an ignition end 200; the firing end 200 is provided with a plurality of firing assemblies 210;

The conductive end of each ignition module 210 passes through the casing of the fixed end 100 to be connected with the adapter 9 arranged inside the casing, and the ignition ends of each ignition module 210 face different directions to form multiple ignition ends;

An insulating sleeve, a conductive main rod 8 and a contact nut 7 are also arranged in the shell of the fixed end 100; the conductive main rod 8, the contact nut 7 and the shell are sequentially sleeved from the center to the periphery, the rear end of the conductive main rod 8 is connected with the contact nut 7, and the front end of the conductive main rod 8 is connected with the adapter 9.

Compared with the ignition electric nozzle with a single ignition end in the prior art, the new ignition electric nozzle structure provided by the embodiment does not simply combine a plurality of ignition electric nozzles with single ignition ends, but adopts the design thought that one fixed end 100 is provided with a plurality of ignition assemblies 210, so as to form the ignition electric nozzle with multiple ignition ends. Thus, this embodiment adds an adapter 9 for integrating a plurality of ignition modules 210 together, and the electrical connection between the conductive main rod 8 and each ignition module 210 is achieved through the adapter 9.

It should be noted that, in this embodiment, the ignition modules 210 may have a conventional structure, so long as the conductive element of each ignition module 210 is electrically connected to the conductive main rod 8 through the adapter 9.

Example 2:

In this embodiment, on the basis of embodiment 1, the performance requirement of the fixed end 100, and the problems of the processing cost and the processing efficiency of the parts are comprehensively considered, and in this embodiment, the main body portion of the fixed end 100 is set into two sections: the first section fixing part mainly comprises a first shell 1 and a first insulating tube 3 sleeved in the first shell 1; the second section fixing part mainly comprises a second housing 2 and a second insulating tube 4 sleeved in the second housing 2. The shell of the fixed end 100 is composed of a first shell 1 and a second shell 2; the insulating sleeve of the fixed end 100 is composed of a first insulating tube 3 and a second insulating tube 4.

Further, in order to ensure that the insulating sleeve is mounted in the shell in a limited manner, the fixed end 100 is further provided with a first bushing 5; the first bushing 5 is mounted at the tail end of the first housing 1 for securing the insulating sleeve within the housing.

Further, in order to provide cushioning, a gasket 6 is added between the first bushing 5 and the second insulating tube 4.

In order to facilitate explanation of the specific connection structure of each ignition module 210 of the two-stage fixing end 100 and the ignition end 200 in the present embodiment, the present embodiment provides a specific structure of an ignition module 210: the ignition assembly 210 includes an ignition housing 211, a porcelain tube 212, a second bushing 213, an ignition conducting rod 214, and a center electrode 215; the ignition housing 211 is sleeved outside the porcelain tube 212 through the second bushing 213, the central electrode 215 and the ignition conducting rod 214 are connected in an axial direction and then sleeved in the porcelain tube 212, the front end of the central electrode 215 stretches into an ignition cavity arranged at the front end of the ignition housing 211, and the tail end of the ignition conducting rod 214 is electrically connected with the conducting main rod 8 through the adapter 9.

Based on the two-stage structure of the fixed end 100 and the structure of the ignition assemblies 210, after each ignition assembly 210 of the ignition end 200 is mounted to the front end of the second stage fixing part through the adapter 9, the first casing 1, the second casing 2 and the ignition casing 211 of each ignition assembly 210 are connected together to form an outer casing layer of the whole ignition device; the first insulating tube 3, the second insulating tube 4 and the porcelain tube 212 of each ignition module 210 are connected together to form an inner insulating layer of the whole ignition device together, and are used for insulating the conductive rod 8, the ignition conductive rod 214 and the central electrode 215 of each ignition module 210.

Further, in order to ensure stability of the connection structure, after the first casing 1, the second casing 2, and the ignition casing 211 are connected, the connection portion is usually fixed by welding. Similarly, after the first bushing 5 is mounted on the tail end of the first housing 1, the first bushing is fixed by welding.

Still further, the annular joints are typically secured by circumferential fusion welding.

In another specific embodiment, the main bodies of the first casing 1 and the second casing 2 are of thin-walled cylindrical structures, one is provided with an annular concave part, the other is provided with an annular convex part, and the first casing 1 and the second casing 2 are fixedly connected into a whole after being combined through the annular concave part and the annular convex part which are mutually sleeved.

Further, the annular concave part and the annular convex part are sleeved to form a limiting end face facing the tail end of the first shell 1; the tail end of the second insulating tube 4 is provided with a circular boss, and the circular end face of the boss is in abutting and limiting connection with the limiting end face.

Here, the first casing 1 and the second casing 2 may be connected to each other by a socket, in which one of the two ends is provided with an annular concave portion and the other is provided with an annular convex portion.

Example 3:

in this embodiment, an ignition plug having three firing ends will be described in detail based on embodiment 1 and embodiment 2.

As shown in fig. 1, the ignition end 200 of the ignition electrode according to the present embodiment is provided with three ignition assemblies 210; the fixed end 100 is provided with a housing and an insulating sleeve, a conductive main rod 8, a contact nut 7 mounted in the housing. As shown in fig. 2, three firing assemblies 210 are connected to the conductive boom 8 by an adapter 9. As shown in fig. 3 and 4, the ignition electrode tip according to the present embodiment includes a first casing 1, a second casing 2, a first insulating tube 3, a second insulating tube 4, a first bushing 5, a washer 6, a contact nut 7, a conductive main rod 8, an adapter 9, an ignition casing 211, a porcelain tube 212, a second bushing 213, an ignition conductive rod 214, and a center electrode 215. As shown in fig. 4, the ignition housing 211, the porcelain tube 212, the second bushing 213, the ignition conductive rod 214, and the center electrode 215 together constitute a set of ignition components.

As shown in fig. 1 and 3, the main body of the first housing 1 is a thin-walled cylindrical structure, and the outer wall is provided with a mounting boss. The front end of the first housing 1 is provided with an annular protrusion for connecting with the second housing 2. The tail end of the inner cavity of the first shell 1 is provided with a bushing mounting groove for mounting the first bushing 5. Further, after the annular convex part and the bushing mounting groove are arranged in the inner cavity of the first shell 1, a three-stage step groove structure is formed, and the inner diameters corresponding to the three steps are sequentially reduced from the tail end to the front end of the first shell 1. Wherein the bushing mounting groove is also a circumferential rivet position of the first bushing 5.

Based on the above structure, after the annular convex part of the first housing 1 and the annular concave part of the second housing 2 are sleeved, a limiting end face is formed at one end facing the tail end of the first housing 1.

As shown in fig. 1 and 3, the main body of the second housing 2 has a thin-walled cylindrical structure. The tail end of the second shell 2 is provided with an annular concave part which can be just sleeved with the annular convex part of the first shell 1. The front end face of the second housing 2 is provided with three planes which are uniformly distributed along the central ring and are mutually angled, and each plane is provided with a through hole for the ignition conducting rod 214 of the ignition assembly 210 to pass through. Typically, the axes of each through-hole are disposed normal to the corresponding plane, so that the three axes of the three through-holes in the three planes are at an angle to each other in space. Further, three axes corresponding to the three through holes have a common intersection point in space.

As shown in fig. 3, the first insulating sleeve is a thin-walled cylinder for insulation.

As shown in fig. 3, the main body of the second insulating sleeve is cylindrical, a double-end stepped hole is formed in the center, and a circular boss is formed on the outer wall of the tail end. The annular end face of the boss is in abutting and limiting connection with the limiting end face. In addition, the double-end stepped hole in the center of the second insulating sleeve is used for accommodating and insulating the contact nut 7, the conductive main rod 8 and the adapter 9.

As shown in fig. 3, the main body of the first bushing 5 is a circular cap with a trapezoid step, and is fixed with the first housing 1 through turning riveting, so as to fix the gasket 6, the first insulating tube 3 and the second insulating tube 4 which are installed in the first housing 1.

As shown in fig. 3, the gasket 6 is disposed between the opposite end surfaces of the first bushing 5 and the first insulating tube 3, and plays a role in buffering and adjusting.

As shown in fig. 3, the whole contact nut 7 is of a stepped cylindrical structure; and is screwed at one end of the conductive main rod 8.

As shown in fig. 3, external thread segments are formed at two ends of the conductive main rod 8, and the conductive main rod 8 is respectively in threaded connection with the contact nut 7 and the adapter 9 through the external thread segments.

Further, after the conductive main rod 8 is in threaded connection with the contact nut 7 and the adapter 9, the conductive main rod is fixed through welding, so that the connection strength is ensured.

As shown in fig. 2 and 3, the adapter 9 is cylindrical as a whole, one end is provided with a first internal threaded small hole for connecting the conductive rod 8, and the other end is provided with three second internal threaded small holes for connecting the ignition conductive rod 214. Further, the three second internal thread small holes are respectively coaxially corresponding to the three through holes arranged on the second shell 2 one by one.

As shown in fig. 4, the ignition module 210 includes an ignition housing 211, a porcelain tube 212, a second bushing 213, an ignition conductive rod 214, and a center electrode 215; the ignition housing 211 is sleeved outside the porcelain tube 212 through the second bushing 213, the central electrode 215 and the ignition conducting rod 214 are connected in an axial direction and then sleeved in the porcelain tube 212, the front end of the central electrode 215 stretches into an ignition cavity arranged at the front end of the ignition housing 211, and the tail end of the ignition conducting rod 214 is electrically connected with the conducting main rod 8 through the adapter 9.

Further, the center electrode 215 and the ignition conductive rod 214 are fixed by welding.

Other portions of this embodiment are the same as those of embodiment 1 and embodiment 2, and thus will not be described again.

The foregoing description is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model in any way, and any simple modification, equivalent variation, etc. of the above embodiment according to the technical matter of the present utility model fall within the scope of the present utility model.

Claims (10)

1. An ignition tip having a multiple firing end, comprising a fixed end (100) and a firing end (200); characterized in that the firing end (200) is provided with a plurality of firing assemblies (210);

The conductive ends of the ignition assemblies (210) penetrate through the shell of the fixed end (100) to be connected with the adapter (9) arranged in the shell, and the ignition ends of the ignition assemblies (210) face different directions to form multiple ignition ends;

an insulating sleeve, a conductive main rod (8) and a contact nut (7) are further arranged in the shell of the fixed end (100); the conductive main rod (8) is sleeved with the contact nut (7) and the shell from the center to the periphery in sequence, the rear end of the conductive main rod (8) is connected with the contact nut (7), and the front end of the conductive main rod (8) is connected with the adapter (9).

2. The ignition tip with multiple firing end of claim 1, wherein the firing assembly (210) comprises a firing housing (211), a porcelain tube (212), a second bushing (213), a firing conductor rod (214), and a center electrode (215);

The ignition shell (211) is sleeved outside the porcelain tube (212) through the second bushing (213), the central electrode (215) and the ignition conducting rod (214) are sleeved in the porcelain tube (212) after being connected in the axial direction, the front end of the central electrode (215) stretches into an ignition cavity arranged at the front end of the ignition shell (211), and the tail end of the ignition conducting rod (214) is electrically connected with the conducting main rod (8) through the adapter (9).

3. A lighting electric nozzle with multiple firing end according to claim 2, characterized in that the shell of the fixed end (100) consists of a first shell (1), a second shell (2); the insulating sleeve of the fixed end (100) consists of a first insulating tube (3) and a second insulating tube (4); the fixed end (100) is also provided with a first bushing (5);

The first insulating tube (3) is sleeved in the first shell (1) to form a first section of fixing part; the second insulating tube (4) is sleeved in the second housing (2) to form a second section fixing part; after the first section fixing part, the second section fixing part and the ignition assembly (210) are sequentially connected, the first shell (1), the second shell (2) and the ignition shell (211) are connected into a whole, and the first insulating tube (3), the second insulating tube (4) and the porcelain tube (212) are connected into a whole; the first bushing (5) is mounted at the tail end of the first housing (1) for fixing the insulating sleeve in the housing.

4. A lighting electric nozzle with multiple firing end according to claim 3, characterized in that said fixed end (100) is also provided with a gasket (6); the first bushing (5) defines the first bushing (5) by means of the gasket (6).

5. A lighting electric nozzle with multiple firing ends according to claim 3, characterized in that the main bodies of the first shell (1) and the second shell (2) are of thin-wall cylindrical structures, one is provided with an annular concave part, the other is provided with an annular convex part, and the first shell (1) and the second shell (2) are fixedly connected into a whole after being combined through the annular concave part and the annular convex part which are mutually sleeved.

6. The ignition electrode tip with the multiple firing end according to claim 5, wherein the annular concave part and the annular convex part are sleeved to form a limiting end face facing the tail end of the first shell (1); the tail end of the second insulating tube (4) is provided with a circular boss, and the circular end face of the boss is in abutting and limiting connection with the limiting end face.

7. A lighting electric nozzle with multiple firing end according to claim 2, characterized in that said adapter (9) is provided with an internally threaded hole for screwing said ignition conducting rod (214); the number of the internally threaded holes is consistent with the number of the ignition assemblies (210), and the axial directions of the plurality of internally threaded holes are at acute angles to each other.

8. A multiple firing tip ignition electrode according to claim 2, wherein the number of the ignition conducting rod (214) and the center electrode (215) in one firing assembly (210) is one, and the center electrode (215) is welded to the front end of the ignition conducting rod (214).

9. A lighting electric nozzle with multiple firing end according to claim 1, characterized in that said contact nut (7) is of a stepped cylindrical structure as a whole; external thread sections are respectively manufactured at two ends of the conductive main rod (8), and the conductive main rod (8) is respectively in threaded connection with the contact nut (7) and the adapter (9) through the external thread sections.

10. A multiple firing tip ignition tip according to any one of claims 1-9, wherein the number of firing assemblies (210) is three.