阅读说明：本技术 一种引射装置 (Injection device ) 是由 解亮 朱赟 张鑫 刘德权 朱威 王靖宇 于 2021-06-23 设计创作，主要内容包括：本申请属于发动机燃烧试验技术领域,具体涉及一种引射装置,包括：收敛段,其内壁自其入口端向其出口端逐渐收缩；扩张段,其进口端与收敛段的出口端对接,其内壁自其入口端向其出口端逐渐扩张；引射管；引射距离调节管,其一端自收敛段的入口端伸入至收敛段内部,向扩张段伸展,另一端套接在在引射管的出口端,能够相对于引射管沿收敛段的轴向滑动。(The application belongs to the technical field of engine combustion test, concretely relates to injection device, include: a convergent section having an inner wall that tapers from its inlet end to its outlet end; the inlet end of the expanding section is butted with the outlet end of the converging section, and the inner wall of the expanding section gradually expands from the inlet end to the outlet end of the converging section; an injection pipe; the injection distance adjusting pipe has one end extending into the convergence section from the inlet end of the convergence section and extending towards the expansion section, and the other end sleeved at the outlet end of the injection pipe and capable of sliding along the axial direction of the convergence section relative to the injection pipe.)

1. The utility model provides an injection device which characterized in that includes:

a convergent section (1) whose inner wall tapers from its inlet end to its outlet end;

the inlet end of the expanding section (2) is butted with the outlet end of the converging section (1), and the inner wall of the expanding section is gradually expanded from the inlet end to the outlet end of the expanding section;

an injection pipe (3);

the injection distance adjusting pipe (4) has one end extending into the convergence section (1) from the inlet end of the convergence section (1) and extending towards the expansion section (2), and the other end sleeved at the outlet end of the injection pipe (3) and capable of sliding along the axial direction of the convergence section (1) relative to the injection pipe (3).

2. The injection apparatus as set forth in claim 1,

a rubber ring and a comb tooth combined structure thereof are arranged between the injection distance adjusting pipe (4) and the injection pipe (3).

3. The injection apparatus as set forth in claim 1,

the inner diameter of the injection distance adjusting pipe (4) gradually shrinks towards the direction of the expansion section (2);

the injection device still includes:

the ejection area adjusting cone (5) is arranged in the ejection distance adjusting pipe (4), an annular circulation gap exists between the ejection distance adjusting pipe (4), and the ejection distance adjusting cone can move along the axial direction of the convergence section (1) relative to the ejection distance adjusting pipe (4).

4. The injection apparatus as set forth in claim 3,

the convergence section (1) is provided with a first injection area adjusting hole;

the ejection distance adjusting pipe (4) is provided with a second ejection area adjusting hole;

the injection device still includes:

one end of the injection area adjusting connecting rod (6) sequentially penetrates through the first injection area adjusting hole and the second injection area adjusting hole and is connected to the injection area adjusting cone (5) so as to drive the injection area adjusting cone (5) to move along the axial direction of the convergence section (1);

the injection area adjusting connecting rod (6) is connected with a first injection area adjusting sealing sheet and a second injection area sealing sheet;

the first injection area adjusting sealing sheet is attached to the outer wall of the convergence section (1) and covers the first injection area adjusting hole;

the second injection area adjusting sealing sheet is attached to the outer wall of the injection distance adjusting pipe (4) and covers the second injection area adjusting hole;

the injection device further comprises:

draw and penetrate area regulation telescopic link (7), one end is connected on convergence section (1) outer wall, the other end with draw and penetrate area regulation connecting rod (6) dorsad draw the one end of penetrating area regulation awl (5) and be connected, can drive draw and penetrate area regulation connecting rod (6) and follow the axial motion of convergence section (1).

5. The injection apparatus as set forth in claim 1,

further comprising:

a mixing section (8) with its inlet end in butt joint with the outlet end of the converging section (1) and its outlet end in butt joint with the inlet end of the diverging section (2).

6. The injection apparatus as set forth in claim 1,

further comprising:

the outlet end of the water spray cooling section (9) is butted with the inlet end of the convergence section (1), and a plurality of water spray cooling holes are formed in the water spray cooling section;

the outlet end of the speed reducing section (10) is butted with the inlet end of the water spray cooling section (9), and the inner wall of the speed reducing section gradually expands from the inlet end to the outlet end of the speed reducing section;

and the outlet end of the collecting section (11) is butted with the inlet end of the speed reducing section (10), and the inner wall of the collecting section is gradually contracted from the inlet end to the outlet end of the collecting section.

7. The injection apparatus as claimed in claim 6,

an annular water spray cooling cavity is formed in the water spray cooling section (9);

each water spray cooling hole is positioned on the inner wall of the water spray cooling section (9) and communicated with the annular water spray cooling cavity;

the outer wall of the water spray cooling section (9) is provided with a water spray cooling inlet; the water spray cooling inlet is communicated with the annular water spray cooling cavity;

the outer wall of the water spray cooling section (9) is provided with a water spray cooling outlet; the water spray cooling outlet is communicated with the annular water spray cooling cavity.

8. The injection apparatus as claimed in claim 7,

further comprising:

a centrifugal spraying device (12) which is connected in part of the water spray cooling holes and is provided with a plurality of centrifugal nozzles distributed along the radial direction of the water spray cooling section (9); each centrifugal nozzle faces the outlet end of the water spray cooling section (9);

a direct injection device (13) connected in the remaining part of the water spray cooling holes and having a plurality of direct injection nozzles distributed radially along the water spray cooling section (9); each of the direct injection nozzles is directed towards the outlet end of the water spray cooling section (9);

the centrifugal injection device (12) is closer to the inlet end of the water spray cooling section (9) than the direct injection device (13).

9. The injection apparatus as set forth in claim 8,

the water spraying cooling section (9) is provided with an injection distance adjusting hole;

the injection device still includes:

one end of the injection distance adjusting connecting rod (14) penetrates through the injection distance adjusting hole and is connected to the injection pipe (3) so as to drive the injection distance adjusting pipe (3) to move along the axial direction of the convergence section (1);

the injection distance adjusting connecting rod (14) is connected with an injection distance adjusting sealing sheet;

the injection distance adjusting sealing sheet is attached to the outer wall of the water spray cooling section (9) and covers the injection distance adjusting hole.

The injection device still includes:

penetrate distance adjustment telescopic link (15), one end is connected on water spray cooling section (9) outer wall, the other end with penetrate distance adjustment connecting rod (14) dorsad penetrate the one end of penetrating distance control pipe (3) and be connected, can drive penetrate distance adjustment connecting rod (14) and follow the axial motion of convergence section (1).

10. The injection apparatus as set forth in claim 8,

the interior of the speed reduction section (10) is provided with an annular water cooling cavity;

the outer wall of the speed reduction section (10) is provided with a water cooling inlet and a water cooling outlet; the water-cooling inlet and the water-cooling outlet are communicated with the annular water-cooling cavity.

Technical Field

The application belongs to the technical field of engine combustion tests, and particularly relates to an injection device.

Background

In the engine combustion chamber test, a high-altitude low-pressure environment needs to be established to collect and discharge the high-temperature high-speed low-pressure tail gas to the atmosphere, the scheme of one-stage or two-stage spray pipe low-pressure injection is adopted according to the injection principle at present, and the high-pressure gas is used as the main flow to drive the forced flow.

The present application has been made in view of the above-mentioned technical drawbacks.

It should be noted that the above background disclosure is only for the purpose of assisting understanding of the inventive concept and technical solutions of the present invention, and does not necessarily belong to the prior art of the present patent application, and the above background disclosure should not be used for evaluating the novelty and inventive step of the present application without explicit evidence to suggest that the above content is already disclosed at the filing date of the present application.

Disclosure of Invention

It is an object of the present application to provide an induction device that overcomes or mitigates at least one of the technical disadvantages known to exist.

The technical scheme of the application is as follows:

an induction apparatus comprising:

a convergent section having an inner wall that tapers from its inlet end to its outlet end;

the inlet end of the expanding section is butted with the outlet end of the converging section, and the inner wall of the expanding section gradually expands from the inlet end to the outlet end of the converging section;

an injection pipe;

the injection distance adjusting pipe has one end extending into the convergence section from the inlet end of the convergence section and extending towards the expansion section, and the other end sleeved at the outlet end of the injection pipe and capable of sliding along the axial direction of the convergence section relative to the injection pipe.

According to at least one embodiment of the application, in the injection device, a rubber ring and a comb tooth combined structure thereof are arranged between the injection distance adjusting pipe and the injection pipe.

According to at least one embodiment of the application, in the injection device, the direction of the radial expansion section in the injection distance adjusting pipe gradually shrinks;

the injection device still includes:

the ejection area adjusting cone is arranged in the ejection distance adjusting pipe, an annular circulation gap exists between the ejection area adjusting cone and the ejection distance adjusting pipe, and the ejection area adjusting cone can move along the axial direction of the convergence section relative to the ejection distance adjusting pipe.

According to at least one embodiment of the present application, in the above-mentioned injection device, the convergent section has a first injection area adjusting hole;

the injection distance adjusting pipe is provided with a second injection area adjusting hole;

the injection device still includes:

and one end of the injection area adjusting connecting rod penetrates through the first injection area adjusting hole and the second injection area adjusting hole in sequence and is connected to the injection area adjusting cone so as to drive the injection area adjusting cone to move along the axial direction of the convergence section.

According to at least one embodiment of the application, in the injection device, the injection area adjusting connecting rod is connected with a first injection area adjusting sealing sheet and a second injection area sealing sheet;

the first injection area adjusting sealing sheet is attached to the outer wall of the convergence section and covers the first injection area adjusting hole;

the second injection area adjusting sealing sheet is attached to the outer wall of the injection distance adjusting pipe and covers the second injection area adjusting hole.

According to at least one embodiment of the present application, the above-mentioned injection apparatus further includes:

one end of the ejection area adjusting telescopic rod is connected to the outer wall of the convergence section, the other end of the ejection area adjusting telescopic rod is connected with one end, back to the ejection area adjusting cone, of the ejection area adjusting connecting rod, and the ejection area adjusting connecting rod can be driven to move along the axial direction of the convergence section.

According to at least one embodiment of the present application, the above-mentioned injection apparatus further includes:

and the inlet end of the mixing section is in butt joint with the outlet end of the convergence section, and the outlet end of the mixing section is in butt joint with the inlet end of the expansion section.

According to at least one embodiment of the present application, the above-mentioned injection apparatus further includes:

the outlet end of the water spray cooling section is butted with the inlet end of the convergence section, and a plurality of water spray cooling holes are formed in the water spray cooling section;

the outlet end of the speed reducing section is butted with the inlet end of the water spray cooling section, and the inner wall of the speed reducing section gradually expands from the inlet end to the outlet end of the speed reducing section;

the outlet end of the collecting section is in butt joint with the inlet end of the speed reducing section, and the inner wall of the collecting section gradually shrinks from the inlet end to the outlet end of the collecting section.

According to at least one embodiment of the present application, in the injection device, the water spray cooling section has an annular water spray cooling cavity therein;

each water spray cooling hole is positioned on the inner wall of the water spray cooling section and is communicated with the annular water spray cooling cavity;

the outer wall of the water spray cooling section is provided with a water spray cooling inlet; the water spray cooling inlet is communicated with the annular water spray cooling cavity.

According to at least one embodiment of the present application, in the above-mentioned injection apparatus, the outer wall of the water spray cooling section has a water spray cooling outlet; the water spray cooling outlet is communicated with the annular water spray cooling cavity.

According to at least one embodiment of the present application, the above-mentioned injection apparatus further includes:

the centrifugal spraying device is connected in part of the water spray cooling holes and is provided with a plurality of centrifugal nozzles which are distributed along the radial direction of the water spray cooling section; each centrifugal nozzle faces the outlet end of the water spray cooling section;

a direct injection device connected to the remaining part of the water spray cooling holes and having a plurality of direct injection nozzles radially distributed along the water spray cooling section; each direct injection nozzle faces the outlet end of the water spray cooling section;

the centrifugal spray device is closer to the inlet end of the water spray cooling section than the direct spray device.

According to at least one embodiment of the present application, in the above-mentioned injection apparatus, the water spray cooling section has a through hole;

the outlet end of the injection pipe penetrates through the through hole and extends towards the convergence section.

According to at least one embodiment of the present application, in the injection device, the water spray cooling section is provided with an injection distance adjusting hole;

the injection device still includes:

and one end of the injection distance adjusting connecting rod penetrates through the injection distance adjusting hole and is connected to the injection pipe so as to drive the injection distance adjusting pipe to move along the axial direction of the convergence section.

According to at least one embodiment of the application, in the injection device, the injection distance adjusting connecting rod is connected with an injection distance adjusting sealing sheet;

the injection distance adjusting sealing sheet is attached to the outer wall of the water spray cooling section and covers the injection distance adjusting hole.

According to at least one embodiment of the present application, the above-mentioned injection apparatus further includes:

the ejection distance adjusting telescopic rod is connected to the outer wall of the water spraying cooling section at one end, and the ejection distance adjusting connecting rod is connected with one end of the ejection distance adjusting pipe in the back direction at the other end, so that the ejection distance adjusting connecting rod can be driven to move along the axial direction of the convergence section.

According to at least one embodiment of the present application, in the above-mentioned injection apparatus, the speed reduction section has an annular water cooling cavity inside;

the outer wall of the speed reducing section is provided with a water cooling inlet and a water cooling outlet; the water-cooling inlet and the water-cooling outlet are communicated with the annular water-cooling cavity.

According to at least one embodiment of the present application, in the above-mentioned injection device, the inner wall of the collecting section conforms to a vickers curve.

Drawings

Fig. 1 is a schematic view of an injection device provided in an embodiment of the present application;

fig. 2 is a partial schematic view of an injection apparatus provided in an embodiment of the present application;

fig. 3 is a schematic view of another part of an injection device provided in the embodiment of the present application;

wherein:

1-a convergence section; 2-an expansion section; 3-an injection pipe; 4-ejecting distance adjusting pipe; 5-injection area adjusting cone; 6-ejecting area adjusting connecting rod; 7-ejecting area adjusting telescopic rod; 8-a mixing section; 9-water spray cooling section; 10-a deceleration section; 11-a collection section; 12-a centrifugal spray device; 13-direct injection means; 14-ejection distance adjusting connecting rod; 15-ejecting distance adjusting telescopic rod.

For the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; further, the drawings are for illustrative purposes, and terms describing positional relationships are limited to illustrative illustrations only and are not to be construed as limiting the patent.

Detailed Description

In order to make the technical solutions and advantages of the present application clearer, the technical solutions of the present application will be further clearly and completely described in the following detailed description with reference to the accompanying drawings, and it should be understood that the specific embodiments described herein are only some of the embodiments of the present application, and are only used for explaining the present application, but not limiting the present application. It should be noted that, for convenience of description, only the parts related to the present application are shown in the drawings, other related parts may refer to general designs, and the embodiments and technical features in the embodiments in the present application may be combined with each other to obtain a new embodiment without conflict.

In addition, unless otherwise defined, technical or scientific terms used in the description of the present application shall have the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. The terms "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer", and the like used in the description of the present application, which indicate orientations, are used only to indicate relative directions or positional relationships, and do not imply that the devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed accordingly, and thus, should not be construed as limiting the present application. The use of "first," "second," "third," and the like in the description of the present application is for descriptive purposes only to distinguish between different components and is not to be construed as indicating or implying relative importance. The use of the terms "a," "an," or "the" and similar referents in the context of describing the application is not to be construed as an absolute limitation on the number, but rather as the presence of at least one. The word "comprising" or "comprises", and the like, when used in this description, is intended to specify the presence of stated elements or items, but not the exclusion of other elements or items.

Further, it is noted that, unless expressly stated or limited otherwise, the terms "mounted," "connected," and the like are used in the description of the invention in a generic sense, e.g., connected as either a fixed connection or a removable connection or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, or they may be connected through the inside of two elements, and those skilled in the art can understand their specific meaning in this application according to the specific situation.

The present application is described in further detail below with reference to fig. 1 to 3.

An induction apparatus comprising:

the inner wall of the convergent section 1 gradually shrinks from the inlet end to the outlet end of the convergent section;

the inlet end of the expanding section 2 is butted with the outlet end of the converging section 1, and the inner wall of the expanding section gradually expands from the inlet end to the outlet end of the expanding section;

an injection pipe 3;

the ejection distance adjusting pipe 4 has one end extending into the convergence section 1 from the inlet end of the convergence section 1 and extending towards the expansion section 2, and the other end sleeved at the outlet end of the ejection pipe 3 and capable of sliding axially along the convergence section 1 relative to the ejection pipe 3.

To the injection apparatus disclosed in the above embodiment, the skilled person in the art can understand that, in the engine combustion chamber test, the inlet end that can set up the convergent section 1 faces the engine combustion chamber outlet, and high-pressure air is let into the injection pipe 3, and high-pressure air enters the convergent section 1 through the injection distance adjusting pipe 4, and high-temperature high-speed low-pressure tail gas discharged from the engine combustion chamber is led into the convergent section 1, and the tail gas is depressurized and accelerated through the convergent section 1, enters the expansion section 2 for pressurization and deceleration, and is discharged to the atmosphere.

To the injection discharging device disclosed in the above embodiment, the skilled person in the art can also understand that, under the condition that the injection pipe 3 and the injection amount thereof are fixed, the distance adjusting pipe 4 can be slidably injected according to the pressure and the flow of the tail gas discharged from the engine combustion chamber, and the distance between the outlet end of the injection distance adjusting pipe 4 and the inlet end of the expansion section 2 is adjusted to ensure that the tail gas discharged from the engine combustion chamber has higher injection efficiency, which can be referred to the following operations:

when the pressure and the flow of the tail gas exhausted from the combustion chamber of the engine are low, the outlet end of the injection distance adjusting pipe 4 can be adjusted to be close to the inlet end of the expansion section 2;

when the pressure of the tail gas exhausted from the combustion chamber of the engine is high and the flow is large, the outlet end of the injection distance adjusting pipe 4 can be adjusted to be far away from the inlet end of the expansion section 2.

In some optional embodiments, in the above-mentioned injection device, a rubber ring and a comb tooth combination structure thereof are arranged between the injection distance adjusting pipe 4 and the injection pipe 3.

To the injection device disclosed in the above embodiment, as can be understood by those skilled in the art, the labyrinth structure can play a role in sealing and supporting the injection distance adjusting pipe 4 and the injection pipe 3, the rubber ring can effectively ensure the sealing between the injection distance adjusting pipe 4 and the injection pipe 3, the rubber ring and the labyrinth combined structure thereof are arranged between the injection distance adjusting pipe 4 and the injection pipe 3, and the sealing between the injection distance adjusting pipe 4 and the injection pipe 3 can be ensured while ensuring the sliding capacity of the injection distance adjusting pipe 4 relative to the injection pipe 3.

In some optional embodiments, in the above-mentioned injection device, the inner diameter of the injection distance adjusting pipe 4 gradually shrinks toward the direction of the expanding section 2;

the injection device still includes:

the injection area adjusting cone 5 is arranged in the injection distance adjusting pipe 4, an annular circulation gap exists between the injection area adjusting cone and the injection distance adjusting pipe 4, and the injection area adjusting cone can move along the axial direction of the convergence section 1 relative to the injection distance adjusting pipe 4.

To the injection apparatus disclosed in the above embodiment, as can be understood by those skilled in the art, under the condition that the injection pipe 3 and the injection amount thereof are fixed, the injection area adjusting cone 5 can be slid according to the pressure and the flow of the exhaust gas discharged from the engine combustion chamber, so as to adjust the area of the annular flow gap between the injection distance adjusting pipe 4 and the injection area adjusting cone 5, and adjust the effective area of the outlet end of the injection distance adjusting pipe 4, that is, the throat area and the outlet flow area of the injection distance adjusting pipe 4 are changed, so as to ensure that the exhaust gas discharged from the engine combustion chamber has higher injection efficiency, specifically, the following operations can be referred to:

when the pressure of tail gas exhausted from a combustion chamber of the engine is low and the flow is small, the sliding injection area adjusting cone 5 is far away from the inlet end of the expansion section 2, so that the throat area and the outlet flow area of the injection distance adjusting pipe 4 are increased;

when the pressure of the tail gas exhausted from the combustion chamber of the engine is high and the flow is large, the sliding injection area adjusting cone 5 is close to the inlet end of the expansion section 2, so that the throat area of the injection distance adjusting pipe 4 and the outlet flow area of the injection distance adjusting pipe are increased and reduced.

In some optional embodiments, in the above-mentioned injection device, the convergent section 1 has a first injection area adjusting hole;

the injection distance adjusting pipe 4 is provided with a second injection area adjusting hole;

the injection device still includes:

draw and penetrate area regulation connecting rod 6, one end passes first and penetrates area regulation hole, second in proper order and penetrates area regulation hole, connects on drawing and penetrates area regulation awl 5 to can drive and penetrate area regulation awl 5 along the axial motion of convergent section 1.

In some optional embodiments, in the injection device, the injection area adjusting connecting rod 6 is connected with a first injection area adjusting sealing sheet and a second injection area sealing sheet;

the first injection area adjusting sealing sheet is attached to the outer wall of the convergence section 1 and covers the first injection area adjusting hole;

the second injection area adjusting sealing sheet is attached to the outer wall of the injection distance adjusting pipe 4 and covers the second injection area adjusting hole.

In some optional embodiments, the above-mentioned injection device further includes:

draw and penetrate area regulation telescopic link 7, one end is connected on the outer wall of convergent section 1, and the other end is connected with the one end of drawing penetrating area regulation connecting rod 6 dorsad and penetrating area regulation awl 5, can drive and penetrate the axial motion of penetrating area regulation connecting rod 6 along convergent section 1.

In some optional embodiments, the above-mentioned injection device further includes:

and the inlet end of the mixing section 8 is in butt joint with the outlet end of the convergence section 1, and the outlet end of the mixing section is in butt joint with the inlet end of the expansion section 2.

To the injection apparatus disclosed in the above embodiment, a person skilled in the art can understand that the tail gas exhausted from the engine combustion chamber is depressurized and accelerated through the convergent section 1, and then enters the mixing section 8, and is fully mixed with the high-pressure gas introduced through the injection distance adjusting pipe 4 in the mixing section 8, and then enters the divergent section 2 after being uniformly mixed, so as to be pressurized and decelerated, and then is exhausted to the atmosphere, thereby effectively reducing the flow resistance loss in the tail gas flowing process.

In some optional embodiments, the above-mentioned injection device further includes:

the outlet end of the water spray cooling section 9 is butted with the inlet end of the convergence section 1, and a plurality of water spray cooling holes are formed in the water spray cooling section;

the outlet end of the speed reducing section 10 is butted with the inlet end of the water spray cooling section 9, and the inner wall of the speed reducing section gradually expands from the inlet end to the outlet end;

the outlet end of the collecting section 11 is in butt joint with the inlet end of the decelerating section 10, and the inner wall of the collecting section gradually shrinks from the inlet end to the outlet end of the decelerating section.

To the injection apparatus disclosed in the above embodiment, a skilled person in the art can understand that, in an engine combustion chamber test, the inlet end of the collecting section 11 may be set to face the outlet of the engine combustion chamber, and the high-temperature, high-speed and low-pressure tail gas exhausted from the engine combustion chamber is collected, and the tail gas flows through the collecting section 11, the deceleration section 10, the water spray cooling section 9, the convergence section 1, the mixing section 8 and the expansion section 2 in sequence and is exhausted to the atmosphere.

For the injection device disclosed in the above embodiment, as can be understood by those skilled in the art, the tail gas exhausted from the engine combustion chamber can reach supersonic speed, and enters the collecting section 11 to reduce the flow rate thereof, and after entering the decelerating section 10, the flow rate can be further reduced to reduce the flow resistance loss, and after entering the water spray cooling section 9, the tail gas can be mixed with the cooling water sprayed through each water spray cooling hole, so that the temperature is reduced, the volume flow is reduced, the pressure is reduced, a low-pressure environment is established, the tail gas enters the converging section 1 through injection of high-pressure gas introduced into the injection distance adjusting pipe 4, and then is exhausted to the atmosphere through the mixing section 8 and the expanding section 2.

In some optional embodiments, in the above-mentioned injection device, the water spray cooling section 9 has an annular water spray cooling cavity inside;

each water spray cooling hole is positioned on the inner wall of the water spray cooling section 9 and communicated with the annular water spray cooling cavity;

the outer wall of the water spray cooling section 9 is provided with a water spray cooling inlet; the water spray cooling inlet is communicated with the annular water spray cooling cavity.

For the injection device disclosed in the above embodiment, it can be understood by those skilled in the art that cooling water can be supplied to the annular water spray cooling cavity through the water spray cooling inlet, and the cooling water is distributed to each water spray cooling hole by the annular water spray cooling cavity and sprayed into the water spray cooling section 9.

In some optional embodiments, in the above-mentioned injection device, the outer wall of the water spray cooling section 9 has a water spray cooling outlet; the water spray cooling outlet is communicated with the annular water spray cooling cavity.

To the induction apparatus that the above-mentioned embodiment discloses, technical personnel can understand in the field can understand, only need a small amount of cooling water to spout into through the water spray cooling hole in the water spray cooling section 9, set up the water spray cooling export with annular water spray cooling chamber intercommunication on the water spray cooling section 9 outer wall, can set up the water spray cooling import that communicates with annular water spray cooling chamber through the water spray cooling section 9 outer wall and let in a large amount of cooling water to annular water spray cooling chamber, wherein let in most of annular water spray cooling chamber cooling water can flow through the water spray cooling export, can be convenient for on the one hand to the regulation and control of the cooling water volume of spouting water spray cooling section 9 through the water spray cooling hole, on the other hand a large amount of cooling water portability flows great heat, gas in the water spray cooling section 9 has better cooling effect.

In some optional embodiments, the above-mentioned injection device further includes:

a centrifugal spray device 12 connected in part of the water spray cooling holes and having a plurality of centrifugal nozzles radially distributed along the water spray cooling section 9; each centrifugal nozzle faces the outlet end of the water spray cooling section 9, and the atomization taper angle can be within the range of 60-120 degrees;

a direct injection device 13 connected to the remaining part of the water spray cooling holes and having a plurality of direct injection nozzles radially distributed along the water spray cooling section 9; each direct jet nozzle faces the outlet end of the water spray cooling section 9, and the atomization cone angle can be within the range of 15-30 degrees;

the centrifugal spraying device 12 is closer to the inlet end of the water spray cooling section 9 than the direct spraying device 13.

To the induction apparatus disclosed in the above embodiment, the skilled person in the art can understand that, after the exhaust gas from the engine combustion chamber enters the water spray cooling section 9, the exhaust gas is firstly mixed with the cooling water sprayed by each centrifugal nozzle, and the temperature can be rapidly reduced, because the centrifugal nozzles have a better atomization effect and are distributed along the water spray cooling section 9, the exhaust gas can be rapidly and uniformly mixed with the gas in the water spray cooling section 9, so that the gas in the water spray cooling section 9 is rapidly cooled.

To the induction apparatus that the above-mentioned embodiment discloses, technical personnel can understand in the field, advance people's water spray cooling section 9's engine combustion chamber exhaust tail gas, after mixing rapid cooling with each centrifugal nozzle spun cooling water, further mix with each direct injection nozzle spun cooling water, the temperature is reduced here, the speed of direct injection nozzle spun cooling water is faster, and have better penetrability, and towards the exit end of water spray cooling section 9, be favorable to establishing the low pressure environment in water spray cooling section 9 based on the momentum principle.

In some optional embodiments, in the above-mentioned injection device, the water spray cooling section 9 has a through hole;

the outlet end of the injection pipe 3 penetrates through the through hole and extends towards the convergence section 1.

In some optional embodiments, in the above-mentioned injection device, the water spray cooling section 9 has an injection distance adjusting hole;

the injection device still includes:

one end of the injection distance adjusting connecting rod 14 penetrates through the injection distance adjusting hole and is connected to the injection pipe 3 so as to drive the injection distance adjusting pipe 3 to move along the axial direction of the convergence section 1.

In some optional embodiments, in the above-mentioned injection device, the injection distance adjusting connecting rod 14 is connected with an injection distance adjusting sealing sheet;

the injection distance adjusting sealing sheet is attached to the outer wall of the water spray cooling section 9 and covers the injection distance adjusting hole.

In some optional embodiments, the above-mentioned injection device further includes:

the ejection distance adjusting telescopic rod 15 is connected to the outer wall of the water spray cooling section 9 at one end, and connected to one end, back to the ejection distance adjusting pipe 3, of the ejection distance adjusting connecting rod 14 at the other end, and can drive the ejection distance adjusting connecting rod 14 to move along the axial direction of the convergence section 1.

In some optional embodiments, in the above-mentioned injection device, the speed reduction section 10 has an annular water cooling cavity inside;

the outer wall of the speed reducing section 10 is provided with a water cooling inlet and a water cooling outlet; the water-cooling inlet and the water-cooling outlet are communicated with the annular water-cooling cavity.

For the injection discharge device disclosed in the above embodiment, as can be understood by those skilled in the art, cooling water may be introduced into the annular water cooling cavity through the water cooling inlet provided on the outer wall of the velocity reduction section 10 to primarily cool the exhaust gas discharged from the engine combustion chamber entering the velocity reduction section 10, and the velocity reduction section 10 may be protected from deformation and damage due to heating.

In some optional embodiments, in the above-mentioned injection device, the inner wall of the collecting section 11 conforms to a vickers curve, so that the pressure gradient of the exhaust gas entering the engine combustion chamber along the axial direction and the partial velocity along the radial direction are gradually reduced, which is beneficial to reducing the flow loss.

The embodiments are described in a progressive manner in the specification, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

Having thus described the present application in connection with the preferred embodiments illustrated in the accompanying drawings, it will be understood by those skilled in the art that the scope of the present application is not limited to those specific embodiments, and that equivalent modifications or substitutions of related technical features may be made by those skilled in the art without departing from the principle of the present application, and those modifications or substitutions will fall within the scope of the present application.