CN210889148U

CN210889148U - Injection valve of multipoint injection engine additionally provided with mixer

Info

Publication number: CN210889148U
Application number: CN201922094031.9U
Authority: CN
Inventors: 唐丽萍; 吕掌权; 张瑜; 姬利娜; 刘近平; 亢凤林
Original assignee: Anyang Institute of Technology
Current assignee: Anyang Institute of Technology
Priority date: 2019-11-28
Filing date: 2019-11-28
Publication date: 2020-06-30
Anticipated expiration: 2029-11-28

Abstract

The application discloses a multi-point injection engine's that installs mixer additional injection valve body, including the multi-point injection valve body, the mixer, the fixed multi-point injection valve body lower extreme of mixer, be provided with the mixer annular chamber in the mixer, cross sprays the frame, the hole and the mixer annular chamber of multi-point injection valve body communicate, the cross tip of the fixed cross of inboard cross of mixer annular chamber sprays the frame, on the inside wall of mixer annular chamber, along the circumferencial direction equipartition be provided with a plurality of jet orifices one that radially run through towards the inboard, and jet orifice one inclines towards the air intake direction of air intake manifold, the mixer annular chamber hole communicates with the hole on two cross limits of cross spray frame, two cross limits are provided with a plurality of equipartition along the cross limit direction through of vertical hole place jet orifice two, air mixes once with jet orifice one spun gas earlier, then mixes with jet orifice two spun gas, so that the air and the fuel gas are uniformly mixed in the mixer.

Description

Injection valve of multipoint injection engine additionally provided with mixer

Technical Field

The utility model relates to an install multiple spot injection engine's of blender additional injection valve belongs to the gas engine field.

Background

The gas engine generally refers to an engine using natural gas as fuel, and is widely applied to daily social production. Gas engines are generally classified into single-point injection engines and multi-point injection engines, distinguished by the way the mixture is formed. The multi-point injection gas engine is a gas engine which injects natural gas with the pressure of 3-5 bar into an air inlet manifold, forms uniform mixed gas with inflowing air and then sucks the mixed gas into a cylinder to ignite and do work. Compared with the traditional low-pressure gas engine, the multi-point injection gas engine has the advantages of fast torque response, low exhaust temperature, reduction of backfire risk of the gas engine and the like.

The multi-point injection gas engine forms mixed gas with air in an air inlet manifold because high-pressure gas forms mixed gas, the air inlet manifold is generally short in structure, and the gas and the air are fully mixed often without sufficient space and time, so that the mixed gas entering a cylinder is not uniformly mixed, the combustion condition in the cylinder is poor, and the heat efficiency is reduced; meanwhile, the dynamic change of the gas pressure causes insufficient injection precision, so that the concentration change of the mixed gas is large, and the work in the cylinder is poor.

Disclosure of Invention

The utility model aims to provide a: the injection valve of the multipoint injection engine is characterized in that an annular injection channel is additionally arranged on an intake manifold, a cross injection channel is connected to the annular injection channel, the annular injection channel is provided with radial injection holes inclined towards the air intake direction, and the cross injection channel is provided with injection holes vertical to the cross edge of the channel.

The technical scheme of the utility model is realized like this: an injection valve of a multipoint injection engine with a mixer comprises a multipoint injection valve body 1, a mixer 2, a gas pressure sensor 5, an injection valve controller 6, an injection valve needle 7 and a connecting valve seat 9, wherein the mixer 2 is fixedly connected with the valve seat 9, the connecting valve seat 9 is fixedly connected with the lower end of the multipoint injection valve body 1, a mixer annular cavity 14 and a cross-shaped injection frame 15 are arranged in the mixer 2, an inner hole of the multipoint injection valve body 1 is communicated with the mixer annular cavity 14 in the mixer 2, the cross-shaped end part of the cross-shaped injection frame 15 is fixed on the inner side of the mixer annular cavity 14, a plurality of injection holes I which radially penetrate towards the inner side are uniformly distributed on the inner side wall of the mixer annular cavity 14 along the circumferential direction, the injection holes I incline towards the air inlet direction of an air inlet manifold 17, the air inlet manifold 17 comprises an air inlet manifold I and an air inlet manifold II, and two sides of the mixer 2 are, One end of the second air inlet manifold is fixedly connected, the other end of the first air inlet manifold is fixedly connected with an air inlet main pipe, the other end of the second air inlet manifold is fixedly connected with an air cylinder 19, a mixer annular cavity 14 and an air inlet manifold 17 are coaxially arranged, the multipoint injection valve body 1 is vertically arranged with the air inlet manifold 17, an inner hole of the mixer annular cavity 14 is communicated with inner holes of two cross edges of the cross injection frame 15, and the two cross edges are provided with a plurality of uniformly distributed second injection holes penetrating along the cross edge direction where the vertical hole is located;

the inner chamber of the multipoint injection valve body 1 is provided with a gas pressure sensor 5 for detecting the pressure of gas, the middle part of the inner chamber of the multipoint injection valve body 1 is also provided with an injection valve needle 7, the injection valve needle 7 is connected with an injection valve controller 6 through a line for controlling the opening time of the injection valve needle 7, and the injection valve controller 6 is connected with a traveling crane computer 10 through a line.

The included angle between the first injection hole and the radial direction of the annular cavity 14 of the mixer is a, and the value range of a is 5-20 degrees.

The mixer 2 is provided with a conical sealing surface 11 of the mixer, and the lower end of the multipoint injection valve body 1 is attached and sealed with the conical sealing surface 11 of the mixer.

And the air inlet of the injection valve body 1 is connected with a fuel gas output device.

The value of a is 13 degrees.

Compared with the prior art, the utility model discloses following positive effect has:

the device is additionally provided with a mixer on the basis of a common multipoint high-pressure injection valve, the added mixer structure enables injected high-pressure gas to be fully mixed with air of an air inlet manifold to form relatively uniform mixed gas and then enter a cylinder to perform combustion work, the mixer and the injection valve are connected through threads and sealed with a conical surface to form a whole, and a gas pressure control mechanism and a pressure difference adjusting mechanism are arranged in an injection valve body, so that the accuracy of the injected natural gas quantity of the gas injection valve is improved, and the concentration of the mixed gas is more favorably controlled; the blender is connected with the intake manifold through a flange, the sealing performance is good, the installation is convenient and rapid, the utility model discloses an improvement of the structure very big degree the precision of gas injection volume has improved the homogeneity of gas mixture, and then has improved engine job stabilization nature and thermal efficiency.

Drawings

Fig. 1 is a schematic view of the general structure of a multi-point injection valve body and a mixer.

Fig. 2 is a schematic diagram of a mixer mounted on an intake manifold.

FIG. 3 is a schematic view of the direction of air intake on the intake manifold.

Fig. 4 is a schematic view of the gas mixing direction of the mixer on the intake manifold.

Reference numerals: 1-multipoint injection valve body, 2-mixer, 3-gas inlet, 5-gas pressure sensor, 6-injection valve controller, 7-injection valve needle, 9-connecting valve seat, 10-traveling computer (ECU), 11-mixer conical sealing surface, 14-mixer annular cavity, 15-cross injection frame, 16-air inlet manifold, 17-air inlet manifold, 18-injection valve assembly, 19-air cylinder, 20-air inlet manifold air inflow direction, 21-mixer excircle jet orifice inclination direction, 22-mixed gas outflow direction and 23-cross injection frame gas ejection direction.

Detailed Description

Referring to fig. 1-4, the utility model discloses an injection valve of multi-point injection engine with additional mixer, including multi-point injection valve body 1, mixer 2, gas pressure sensor 5, injection valve controller 6, injection needle 7, connection valve seat 9, mixer 2 on be provided with mixer toper seal face 11, multi-point injection valve body 1 lower extreme and mixer toper seal face 11 laminating are sealed, fixed connection valve seat 9 on mixer 2, connection valve seat 9 fixes multi-point injection valve body 1 lower extreme, be provided with mixer annular chamber 14, cross injection frame 15 in the mixer 2, the hole of multi-point injection valve body 1 communicates with mixer annular chamber 14 in the mixer 2, the cross tip of the inboard fixed injection frame 15 of cross mixer annular chamber 14, on the inside wall of mixer annular chamber 14, be provided with a plurality of jet orifices that radially run through towards the inboard along the circumferencial direction equipartition, the first injection hole is inclined towards the air inlet direction of the air inlet manifold 17, the air inlet manifold 17 comprises a first air inlet manifold and a second air inlet manifold, two sides of the mixer 2 are fixedly connected with one end of the first air inlet manifold and one end of the second air inlet manifold respectively, the other end of the first air inlet manifold is fixedly connected with an air inlet main pipe, the other end of the second air inlet manifold is fixedly connected with the air cylinder 19, the mixer annular cavity 14 and the air inlet manifold 17 are coaxially arranged, the multipoint injection valve body 1 and the air inlet manifold 17 are vertically arranged, the included angle between the first injection hole and the mixer annular cavity 14 in the radial direction is a, the value range of a is 5-20 degrees, for example 13 degrees, the inner hole of the mixer annular cavity 14 is communicated with the inner holes of two cross edges of the cross-shaped injection frame 15, and the two cross edges are provided with a plurality of second injection holes which are.

The inner chamber of the multipoint injection valve body 1 is provided with a gas pressure sensor 5 for detecting the pressure of gas, the middle part of the inner chamber of the multipoint injection valve body 1 is also provided with an injection valve needle 7, and the injection valve needle 7 is connected with an injection valve controller 6 through a line for controlling the opening time of the injection valve needle 7.

The injection valve controller 6 is connected with a traveling computer (ECU) 10 through a line.

The working principle is as follows:

when the ECU calculates that gas needs to be injected, the ECU sends a signal for opening an injection valve needle 7 and a signal for opening duration time to an injection valve controller 6, the injection valve controller 6 receives the signal and then opens the injection valve needle 7 for a set time, the gas flowing into an injection valve body 1 from a gas inlet 3 passes through the injection valve needle 7 and is injected into a mixer 2, the gas injected into the mixer 2 is injected along a first injection hole and a second injection hole of a cross injection frame 15 arranged on an annular cavity 14 of the mixer, as shown in figures 3 and 4, the gas injected from the second injection hole is in a cross injection frame gas injection direction 23 and forms an included angle of 90 degrees with an air inflow direction 20 of an air inlet manifold, the gas injected from the first injection hole is in an inclined direction 21 of an excircle injection hole of the mixer and forms an angle of 90 degrees + a with the air inflow direction 20 of the air inlet manifold, and the gas injected from the, that is, the air is mixed with the gas sprayed from the first spraying hole once and then mixed with the gas sprayed from the second spraying hole, so that the air and the gas are uniformly mixed in the mixer 2.

Claims

1. An injection valve of a mixer-mounted multi-point injection engine, characterized in that: the multi-point injection valve comprises a multi-point injection valve body (1), a mixer (2), a gas pressure sensor (5), an injection valve controller (6), an injection valve needle (7) and a connecting valve seat (9), wherein the mixer (2) is fixedly connected with the valve seat (9), the connecting valve seat (9) is used for fixing the lower end of the multi-point injection valve body (1), a mixer annular cavity (14) and a cross injection frame (15) are arranged in the mixer (2), an inner hole of the multi-point injection valve body (1) is communicated with the mixer annular cavity (14) in the mixer (2), the cross end part of the cross injection frame (15) is fixed on the inner side of the mixer annular cavity (14), a plurality of injection holes I which radially penetrate towards the inner side are uniformly distributed on the inner side wall of the mixer annular cavity (14) along the circumferential direction, the injection holes I incline towards the air inlet direction of an air inlet manifold (17), and, Two sides of the mixer (2) are respectively fixedly connected with one end of the first air inlet manifold and one end of the second air inlet manifold, the other end of the first air inlet manifold is fixedly connected with an air inlet main pipe, the other end of the second air inlet manifold is fixedly connected with an air cylinder (19), a mixer annular cavity (14) and the air inlet manifold (17) are coaxially arranged, the multipoint injection valve body (1) and the air inlet manifold (17) are vertically arranged, inner holes of the mixer annular cavity (14) are communicated with inner holes of two cross edges of the cross injection frame (15), and the two cross edges are provided with a plurality of uniformly distributed second injection holes penetrating along the cross edge direction where the vertical holes are located;

the inner chamber of the multi-point injection valve body (1) is provided with a gas pressure sensor (5) for detecting the pressure of gas, the middle part of the inner chamber of the multi-point injection valve body (1) is also provided with an injection valve needle (7), the injection valve needle (7) is connected with an injection valve controller (6) through a circuit for controlling the opening time of the injection valve needle (7), and the injection valve controller (6) is connected with a traveling crane computer (10) through a circuit.

2. The injection valve of a mixer-equipped multipoint injection engine according to claim 1, characterized in that: the included angle between the first injection hole and the radial direction of the annular cavity (14) of the mixer is a, and the value range of a is 5-20 degrees.

3. The injection valve of a mixer-equipped multipoint injection engine according to claim 2, characterized in that: the mixer (2) is provided with a conical sealing surface (11) of the mixer, and the lower end of the multipoint injection valve body (1) is attached and sealed with the conical sealing surface (11) of the mixer.

4. Injection valve of a mixer-equipped multipoint injection engine according to any of claims 1-3, characterized in that: and the air inlet of the multipoint injection valve body (1) is connected with a fuel gas output device.

5. Injection valve of a mixer-equipped multipoint injection engine according to claim 2 or 3, characterized in that: the value of a is 13 deg.