CN216950613U

CN216950613U - Mixer assembly

Info

Publication number: CN216950613U
Application number: CN202220717279.5U
Authority: CN
Inventors: 罗昌贵; 莫宗华; 林鹏慧; 魏威
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2022-07-12
Anticipated expiration: 2032-03-30

Abstract

The utility model discloses a mixer assembly which comprises a mixer, wherein a mixer pipeline is arranged on the mixer and penetrates through the left end face and the right end face of the mixer, two air inlets are formed in the front end face of the mixer, a mixer connecting pipe is arranged on the right end face of the mixer, and a flow guide structure is arranged on the mixer connecting pipe. The utility model can effectively guide the gas, enable the gas to form a specific moving direction, and improve the mixing uniformity of gas and air, thereby ensuring the concentration uniformity of the mixed gas of each cylinder of the engine, improving the combustion effect and the running performance of the engine, reducing the emission and preventing the emission from exceeding the standard.

Description

Mixer assembly

[ technical field ] A

The utility model belongs to the technical field of engine parts, and particularly relates to a mixer assembly.

[ background ] A method for producing a semiconductor device

The natural gas engine is an engine using natural gas as a fuel, and in recent years, the natural gas engine has been widely developed and applied. The natural gas supply mode is a key technology for developing a natural gas engine. It affects the dynamic property, economical efficiency, safety and reliability and discharge index of natural gas engine to a great extent. The mixer is an important part of the single-point gas supply type natural gas engine, is arranged behind an electronic throttle valve and in front of an air inlet main pipe, and has the function of fully mixing natural gas, intercooled air and EGR waste gas, so that the mixed gas is combusted more fully, the NOx emission and the exhaust temperature are effectively reduced, and the performance and the emission index of the engine are improved. Because the density of natural gas and air is different, when the mixer in the prior art mixes natural gas and air, the concentration of the mixed gas is uneven, so that the air-fuel ratio difference of the mixed gas of each cylinder of the engine is larger, the combustion effect is influenced, the performance of the engine is reduced, and the emission exceeds the standard. Therefore, it is of great significance to study the mixing state of natural gas and air at the outlet of the mixer.

[ Utility model ] A method for manufacturing a semiconductor device

The utility model aims to provide a mixer assembly to solve the problems that the existing mixer assembly has uneven mixing of various gases, so that the air-fuel ratio difference of mixed gas of each cylinder of an engine is large, the combustion effect is influenced, the performance of the engine is reduced, the emission exceeds the standard and the like.

In order to solve the technical problems, the utility model adopts the following technical scheme:

the utility model provides a mixer assembly, includes the blender, the blender pipeline has been seted up on the blender, the blender pipeline runs through the left end face and the right-hand member face of blender, two air inlets have been seted up to the preceding terminal surface of blender, the right-hand member face of blender is equipped with the blender and takes over, be equipped with the water conservancy diversion structure on the blender is taken over.

Further, the pipeline port on the left end face of the mixer is a mixed gas outlet, and the pipeline port on the right end face of the mixer is a mixed gas inlet.

Further, the air inlet on the right side of the front end face of the mixer is an EGR inlet, and the air inlet on the left side of the front end face of the mixer is a fuel gas inlet.

Furthermore, the mixer connecting pipe is a bent pipe mixer connecting pipe, a vertical lower flow guide structure is arranged on the bottom surface of a bending part inside the bent pipe mixer connecting pipe, and a vertical upper flow guide structure is arranged on the top surface of the bending part inside the bent pipe mixer connecting pipe.

Further, the lower flow guide structure and the upper flow guide structure body are flow guide steel plates.

Furthermore, one end of the upper flow guide structure is arc-shaped, and the arc-shaped part of the upper flow guide structure is connected with the side wall of the middle upper part in the elbow mixer.

Furthermore, the lower diversion structure and the upper diversion structure are both bent.

Further, the position of one end, pointing to the right end face of the mixer, of the lower diversion structure is deviated to the left side of the inside of the elbow mixer connecting pipe, and the position of one end, pointing to the right end face of the mixer, of the upper diversion structure is deviated to the right side of the elbow mixer connecting pipe.

Further, the mixer connecting pipe is a straight pipe mixer connecting pipe, and a plurality of side wall flow guide structures are arranged inside the straight pipe mixer connecting pipe.

Further, the side wall flow guide structure is a blade structure, and the side wall flow guide structure is reduced from the right end to the left end to form a strip-shaped blade structure.

The utility model has the following beneficial effects:

the mixer adapter is additionally arranged at one end of the mixer, and the flow guide structure is arranged in the mixer adapter, so that a guide effect can be effectively formed on gas, the gas can form a specific moving direction, and the mixing uniformity of gas and air is improved, thereby ensuring the uniformity of the concentration of mixed gas in each cylinder of the engine, improving the combustion effect and the running performance of the engine, reducing emission and preventing emission from exceeding the standard.

The mixer connecting pipe can be arranged into a curved shape and a straight pipe shape, so that the reasonability of the position distribution of the mixer connecting pipe on the natural gas engine is improved, the interference of components is avoided, and the compactness of the natural gas engine is improved.

[ description of the drawings ]

In the drawings:

FIG. 1 is a front view of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is a first perspective view of the air intake nipple of the present invention;

FIG. 4 is a second perspective view of the air intake nipple of the present invention;

FIG. 5 is a cross-sectional view of a front view of a second embodiment of the air intake nipple of the present invention;

FIG. 6 is a schematic perspective view of a second embodiment of the air intake nipple of the present invention;

FIG. 7 is a cloud of cross-sectional velocity profiles without the use of the present invention;

FIG. 8 is a cloud of cross-sectional velocity profiles using aspects of the present invention;

fig. 9 is a comparison table of parameters of the flow guide structure.

Reference numerals: 1. a mixer; 1-1, a gas inlet; 1-2, EGR inlet; 1-3, mixed gas outlet; 2. a pipe bending mixer is connected; 2-1, an air inlet; 2-2, an upper flow guide structure; 2-3, a lower flow guide structure; 3. A straight pipe mixer adapter; 3-1 and a side wall flow guide structure.

[ detailed description ] embodiments

The following is a detailed description of specific embodiments.

The present invention will be described in further detail with reference to specific embodiments. It should be emphasized that the following description is merely exemplary in nature and is not intended to limit the scope of the utility model or its application.

Example 1: as shown in fig. 1-4, a mixer assembly, including mixer 1, the mixer pipeline has been seted up on mixer 1, the mixer pipeline runs through left end face and the right end face of mixer 1, the pipeline mouth of the left end face of mixer 1 is the mixed gas export, the pipeline mouth of the right end face of mixer 1 is the mixed gas entry, two air inlets have been seted up to the preceding terminal surface of mixer 1, the air inlet on mixer 1 preceding terminal surface right side is EGR entry 1-2, the left air inlet of mixer 1 preceding terminal surface is gas entry 1-1, the right end face of mixer 1 is equipped with the mixer takeover, be equipped with the water conservancy diversion structure on the mixer takeover.

The mixer connecting pipe is a bent pipe mixer connecting pipe 2, a vertical lower flow guide structure 2-3 is arranged on the bottom surface of a bending part inside the bent pipe mixer connecting pipe 2-3, a vertical upper flow guide structure 2-2 is arranged on the top surface of the bending part inside the bent pipe mixer connecting pipe 2-3, the lower flow guide structure 2-3 and an upper flow guide structure 2-2 body are made of flow guide steel plates, one end, away from the right end face of the mixer 1, of the upper flow guide structure 2-2 is arc-shaped, the arc-shaped part of the upper flow guide structure 2-2 is connected with the side wall of the middle upper part inside the bent pipe mixer 2, the lower flow guide structure 2-3 and the upper flow guide structure 2-2 are bent per se to facilitate flow guide, the position, pointing to one end of the right end face of the mixer 1, of the lower flow guide structure 2-3 is deviated to the left side inside the bent pipe mixer connecting pipe 2, and the position, pointing to one end of the right end face of the mixer 1, of the upper flow guide structure 2-3 is deviated to the right end face of the bent pipe mixer connecting pipe 2 And (3) side.

Example 2: as shown in fig. 2-6, in this embodiment, the mixer structure is the same as that of embodiment 1, where the mixer adapter is a straight pipe mixer adapter 3, a plurality of sidewall flow guiding structures 3-1 are arranged inside the straight pipe mixer adapter 3, the sidewall flow guiding structures 3-1 are blade structures, and the sidewall flow guiding structures 3-1 are narrowed from the right end to the left end to form a strip-shaped blade structure.

The mixer adapter can also be provided with rotating fan blades.

The working principle is as follows: the air is disturbed and disordered through an upper diversion structure 2-2 and a lower diversion structure 2-3 or a side wall diversion structure 3-1 before entering a mixer 1 from a mixer connecting pipe, EGR waste gas is introduced into the mixer 1 at an EGR inlet 1-2, gas is introduced into a gas inlet 1-1, and the air is in a turbulent state when reaching the mixer 1, so that the flow direction of the EGR waste gas and the gas can be disturbed and fully mixed with the air, the mixing uniformity of the gas and the air is improved, and the concentration uniformity of mixed gas of each cylinder of an engine is ensured; the combustion effect and the running performance of the engine are improved, the emission is reduced, and the emission standard exceeding is prevented.

In comparative analysis, as shown in fig. 7 to 9, the present and original solutions have large differences in the uniformity of each gas at 1700rpm and 1200rpm of the engine, and the trends and deviation values have slight differences. In combination, the uniformity of the flow guide scheme is better; the total pressure resistance of the pipeline of the two schemes at 1700rpm and the distance from the front of the throttle valve to the outlet of the connecting pipe are 8.6kPa in the original scheme, 9.9kPa in the scheme, and the difference is large; in the speed distribution cloud chart of the cross section of the mixer, the speed of the original scheme is very uniform, the speed of the scheme is more disordered, and the EGR waste gas, the fuel gas and the air are mixed more fully.

Claims

1. A mixer assembly, comprising: the mixer comprises a mixer, the mixer pipeline has been seted up on the mixer, the mixer pipeline runs through the left end face and the right end face of mixer, two air inlets have been seted up to the preceding terminal surface of mixer, the right end face of mixer is equipped with the mixer and takes over, be equipped with the water conservancy diversion structure on the mixer is taken over.

2. A mixer assembly in accordance with claim 1, wherein: the pipeline port of the left end face of the mixer is a mixed gas outlet, and the pipeline port of the right end face of the mixer is a mixed gas inlet.

3. A mixer assembly in accordance with claim 1, wherein: the air inlet on the right side of the front end face of the mixer is an EGR inlet, and the air inlet on the left side of the front end face of the mixer is a fuel gas inlet.

4. A mixer assembly in accordance with claim 1, wherein: the mixer connecting pipe is a bent pipe mixer connecting pipe, a vertical lower flow guide structure is arranged on the bottom surface of a bending part inside the bent pipe mixer connecting pipe, and a vertical upper flow guide structure is arranged on the top surface of the bending part inside the bent pipe mixer connecting pipe.

5. A mixer assembly in accordance with claim 4, wherein: the lower diversion structure and the upper diversion structure body are diversion steel plates.

6. A mixer assembly in accordance with claim 4, wherein: one end of the upper diversion structure is arc-shaped, and the arc-shaped part of the upper diversion structure is connected with the side wall of the middle upper part in the elbow mixer.

7. A mixer assembly in accordance with claim 4, wherein: the lower diversion structure and the upper diversion structure are both bent.

8. A mixer assembly in accordance with claim 4, wherein: the position of the one end of the directional mixer of water conservancy diversion structure right-hand member face is inclined to the left side of the inside elbow mixer takeover down, the position of the one end of the directional mixer right-hand member face of water conservancy diversion structure is inclined to the right side of elbow mixer takeover on going up.

9. A mixer assembly in accordance with claim 1, wherein: the mixer connecting pipe is a straight pipe mixer connecting pipe, and a plurality of side wall flow guide structures are arranged inside the straight pipe mixer connecting pipe.

10. A mixer assembly in accordance with claim 9, wherein: the side wall flow guide structure is of a blade structure, and the side wall flow guide structure is reduced from the right end to the left end to form a long strip-shaped blade structure.