CN218522729U

CN218522729U - Nozzle arrangement structure of hydrogen engine

Info

Publication number: CN218522729U
Application number: CN202223048203.7U
Authority: CN
Inventors: 吴剑辉; 何化; 肖刚; 梁德浦
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2022-11-16
Filing date: 2022-11-16
Publication date: 2023-02-24
Anticipated expiration: 2032-11-16

Abstract

The utility model discloses a nozzle arrangement structure of hydrogen engine relates to the installation of gas engine nozzle and arranges, has solved and has carried out the nozzle through the mode of heightening the cylinder head and arrange and lead to the engine height to increase, influences the technical problem of engine suitability. Comprises an air rail and nozzles the number of which is consistent with that of air inlets on the cylinder cover; the air rail is arranged on one side of the cylinder cover and is arranged on the air inlet pipe; the plurality of nozzles are arranged on the air rail, and the injection ends of the nozzles extend obliquely upwards into an air inlet channel of the cylinder cover. The utility model discloses it is rational in infrastructure, be favorable to the control of the whole size of engine, the mode of having avoided increasing the cylinder head carries out the nozzle and arranges the problem that leads to the engine height to increase.

Description

Nozzle arrangement structure of hydrogen engine

Technical Field

The utility model relates to a gas engine nozzle installation is arranged, and more specifically says that it relates to a nozzle arrangement structure of hydrogen engine.

Background

When the hydrogen engine works, hydrogen needs to be fully mixed with air. The hydrogen is directly sprayed into the air inlet passage through the nozzle, the air enters the air inlet passage from the side surface of the cylinder cover and is mixed with the hydrogen, then the air enters the combustion chamber through the air inlet passage of the cylinder cover, and the ignition system ignites and ignites the mixed gas to enable the engine to do work and output power. The nozzle of the current hydrogen engine is generally arranged on the top surface of the cylinder cover, and because the ignition system of the engine is generally arranged above the cylinder cover and fixed on the cylinder cover, the arrangement of the two on the cylinder cover causes the problem of tense arrangement of the space above the cylinder cover. At present, the arrangement of the nozzles is mostly carried out by a method of heightening a cylinder head cover and the like. However, such an arrangement increases the height of the engine, thereby affecting the suitability of the engine.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is not enough to prior art, provides a nozzle arrangement structure of hydrogen engine, has solved and has carried out the nozzle through the mode of heightening the cylinder head and arrange and lead to the engine height to increase, influences the problem of engine suitability.

The utility model relates to a nozzle arrangement structure of a hydrogen engine, which comprises an air rail and nozzles, the number of which is consistent with that of air inlets on an air cylinder cover; the air rail is arranged on one side of the cylinder cover and is arranged on the air inlet pipe; the plurality of nozzles are installed on the air rail, and the injection ends of the nozzles extend obliquely upwards into an air inlet passage of the cylinder cover.

The included angle between the nozzle and the horizontal end face of the cylinder cover is 40-60 degrees.

The included angle between the nozzle and the horizontal end face of the cylinder cover is 45 degrees.

The air rail is provided with a plurality of bosses I, and the air inlet pipe is provided with a plurality of bosses II which correspond to the bosses I one by one; the first boss is provided with a through hole, the second boss is provided with a threaded hole, and a locking bolt is inserted in the through hole and is in threaded connection with the threaded hole.

The one end that the intake duct is close to the combustion chamber is equipped with a gas mixing chamber, the sectional area of gas mixing chamber is greater than the sectional area of intake duct.

And a flow squeezing channel with the sectional area smaller than that of the air inlet channel is arranged between the air mixing cavity and the air inlet channel.

The distance between the injection end of the nozzle and the combustion chamber is smaller than the distance between the joint of the air inlet pipe and the cylinder cover and the combustion chamber.

Advantageous effects

The utility model has the advantages that: the air rail and the nozzle are arranged on the side face of the engine, so that the control of the whole size of the engine is facilitated, and the problem that the height of the engine is increased due to the fact that the nozzle is arranged in a mode of heightening the cylinder cover is solved. In addition, a mixed flow structure is arranged in the air inlet channel, so that the hydrogen and the air can be fully mixed, and the efficiency of the gas in the subsequent combustion process can be improved.

Drawings

FIG. 1 is a schematic cross-sectional structure diagram of the nozzle arrangement structure of the present invention;

fig. 2 is a schematic side view of the nozzle arrangement structure of the present invention.

Wherein: the device comprises a gas rail 1, a cylinder cover 2, a nozzle 3, an air inlet pipe 4, an air inlet passage 5, a gas mixing cavity 6, a flow squeezing channel 7 and a boss I8.

Detailed Description

The present invention will be further described with reference to the following examples, which are not intended to limit the scope of the present invention, but are intended to be covered by the appended claims in any way.

Referring to fig. 1-2, the nozzle arrangement structure of the present invention for a hydrogen engine includes an air rail 1, and nozzles 3 whose number is the same as that of the air inlets on the cylinder head 2. The present embodiment takes a four-cylinder engine as an example, that is, the arrangement of the present embodiment is provided with four nozzles 3. Wherein the air rail 1 is used for supplying air to the nozzles 3. The air rail 1 is arranged on one side of the cylinder head 2, the air rail 1 is mounted on the intake pipe 4, and the air rail 1 is located below the intake pipe 4. Specifically, the air rail 1 is provided with four bosses I8, and the air inlet pipe 4 is provided with four bosses II which correspond to the bosses I8 one by one. The first boss 8 is provided with a through hole, the second boss is provided with a threaded hole, a locking bolt is inserted into the through hole and is in threaded connection with the threaded hole, and the fixed installation of the air rail 1 is realized. The installation is detachable installation, so that the air rail 1 and the nozzle 3 can be conveniently detached and replaced.

Four nozzles 3 are installed on the air rail 1, and the nozzles 3 and the air rail 1 are installed as an integrated body. The injection end of the nozzle 3 extends obliquely upward into an intake passage 5 of the cylinder head 2. Specifically, the cylinder cover 2 is provided with an installation channel matched with the spraying end of the nozzle 3, the installation channel is communicated with the air inlet channel 5, and the nozzle 3 is installed in the installation channel, so that the installation of the nozzle 3 is realized.

In the embodiment, the air rail 1 and the nozzle 3 are arranged on the side surface of the engine and below the air inlet pipe 4, so that the control of the whole size of the engine is facilitated, and the problem of height increase of the engine caused by arrangement of the nozzle in a mode of heightening a cylinder cover is solved.

Further, the distance from the injection end of the nozzle 3 to the combustion chamber is smaller than the distance from the junction of the intake pipe 4 and the cylinder head 2 to the combustion chamber. The advantage of arranging like this is that, at the same time, the moment that hydrogen gets into intake duct 5 is earlier, under the pressure of air, can avoid hydrogen to flow back in intake duct 5, causes the tempering, influences engine combustion.

The included angle between the nozzle 3 and the horizontal end face of the cylinder head 2 is 40-60 degrees, and the control of the whole size of the engine after the air rail 1 and the nozzle 3 are installed is facilitated. Preferably, the angle between the nozzle 3 and the horizontal end surface of the cylinder head 2 is 45 °.

Preferably, one end of the air inlet channel 5, which is close to the combustion chamber, is provided with an air mixing cavity 6, the output end of the nozzle 3 is communicated with the air mixing cavity 6, and the sectional area of the air mixing cavity 6 is larger than that of the air inlet channel 5. As the amount of hydrogen gas increases when it mixes with air, the pressure at the mixing location will also increase. For avoiding the too big intake flow that leads to of mixing department pressure to be influenced, consequently, this embodiment has set up the great gas mixing chamber of sectional area 6 to the mixture of hydrogen and air also reduces simultaneously and influences the problem of admitting air because of the too much influence of mixing department pressure increase suddenly after mixing.

In addition, in the embodiment, a flow squeezing channel 7 with a sectional area smaller than that of the air inlet channel 5 is further arranged between the air mixing cavity 6 and the air inlet channel 5, so that when air passes through the flow collecting channel 7, the flow velocity sent into the air mixing cavity 6 is increased through squeezing of the flow squeezing channel 7, and the problem of air backflow in the air mixing cavity 6 can be effectively reduced.

The above is only the preferred embodiment of the present invention, and it should be noted that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which will not affect the utility model and the utility of the patent.

Claims

1. A nozzle arrangement structure of a hydrogen engine is characterized by comprising an air rail (1) and nozzles (3) the number of which is consistent with that of air inlets on a cylinder cover (2); the air rail (1) is arranged on one side of the cylinder cover (2), and the air rail (1) is installed on the air inlet pipe (4); the plurality of nozzles (3) are arranged on the air rail (1), and the injection ends of the nozzles (3) extend obliquely upwards into an air inlet channel (5) of the cylinder cover (2).

2. A nozzle arrangement for a hydrogen engine according to claim 1, characterized in that the angle between the nozzle (3) and the horizontal end surface of the cylinder head (2) is 40 ° -60 °.

3. A nozzle arrangement of a hydrogen engine according to claim 2, characterized in that the angle between the nozzle (3) and the horizontal end surface of the cylinder head (2) is 45 °.

4. A nozzle arrangement structure of a hydrogen engine according to claim 1, characterized in that a plurality of bosses one (8) are installed on the gas rail (1), and a plurality of bosses two corresponding to the bosses one (8) one by one are installed on the intake pipe (4); the first boss (8) is provided with a through hole, the second boss is provided with a threaded hole, and a locking bolt is inserted into the through hole and is in threaded connection with the threaded hole.

5. The nozzle arrangement structure of a hydrogen engine according to claim 1, characterized in that one end of the inlet channel (5) close to the combustion chamber is provided with a gas mixing chamber (6), the output end of the nozzle (3) is communicated with the gas mixing chamber (6), and the sectional area of the gas mixing chamber (6) is larger than that of the inlet channel (5).

6. A nozzle arrangement structure of a hydrogen engine according to claim 5, characterized in that a flow-extruding passage (7) having a smaller cross-sectional area than the inlet passage (5) is provided between the gas mixing chamber (6) and the inlet passage (5).

7. A nozzle arrangement of a hydrogen engine according to claim 1, characterized in that the distance of the injection end of the nozzle (3) from the combustion chamber is smaller than the distance of the connection of the intake pipe (4) and the cylinder head (2) from the combustion chamber.