CN114183285B

CN114183285B - Engine end face flow guide air inlet pipe structure

Info

Publication number: CN114183285B
Application number: CN202111270894.2A
Authority: CN
Inventors: 徐敏; 安涛; 苏一峰
Original assignee: Dongfeng Commercial Vehicle Co Ltd
Current assignee: Dongfeng Commercial Vehicle Co Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2023-03-24
Anticipated expiration: 2041-10-29
Also published as: CN114183285A

Abstract

The invention discloses an end surface flow guide air inlet pipe structure of an engine, which comprises an air inlet manifold, wherein an air inlet is positioned on the end surface of the air inlet manifold; and the surface of the guide pipe is also provided with a plurality of guide pipe air distributing openings corresponding to the air outlets of the air inlet manifold. The air inlet consistency requirement of each cylinder of the engine is met by adding the flow guide device in the air inlet manifold, the flow guide device can be a pipe or a sheet metal part formed by bending, and the mixed air can be guided into one to two cylinders farthest away from the air inlet of the air inlet manifold.

Description

Engine end surface flow guide air inlet pipe structure

Technical Field

The invention relates to the technical field of automobile engines, in particular to an engine end surface flow guide air inlet pipe structure.

Background

The cylinder diameter of a heavy engine is large, so that an air inlet pipe is long, and when air enters from the end face of an air inlet manifold, the air inlet amount of an engine cylinder body farthest from an air inlet main port is influenced by air inlet of other cylinders, so that the air inlet amount is insufficient. Especially for the premixing natural gas engine, the efficiency of the engine is seriously influenced by the insufficient air input of the cylinder body of the engine, and the power output of the premixing natural gas engine is completely dependent on the air input of the mixed gas, so that the unevenness of the air input of each cylinder influences the unevenness of each cylinder, and the reliability of the whole machine is influenced by long time.

Application number CN202021323014.4, the patent of the patent name "an aeroengine air intake system and air intake manifold thereof" discloses an aeroengine air intake system and air intake manifold thereof, an aeroengine air intake system's air intake manifold, including the air intake manifold body, the air intake manifold body is Y shape, the air intake manifold body of Y shape includes that one has inlet end and gives vent to anger the house steward of end, two have the inlet end and give vent to anger the intake pipe of end, the inlet end of two intake pipes all with the end intercommunication of giving vent to anger of house steward, its characterized in that: the inlet end of house steward is provided with convex splitter plate, the splitter plate sets up house steward's last inner wall and/or lower inner wall, the splitter plate extends towards the one side of the intake pipe far away of the end of giving vent to anger. The flow distribution pieces are two and are respectively arranged in the upper inner wall and the lower inner wall of the air inlet end of the header pipe, and the two flow distribution pieces extend towards one side of the air inlet pipe far away from the air outlet pipe. The section of the splitter vane facing the extending direction is wing-shaped. The splitter vane and the intake manifold body are integrally cast. The splitter vane and the intake manifold are arranged in a split manner. The flow distribution plate comprises a lower flow distribution plate and an upper flow distribution plate, the lower flow distribution plate and the upper flow distribution plate are respectively provided with an installation boss and a wing-shaped plate, the air inlet end of a main pipe of the air inlet manifold body is provided with an installation flange surface, and the installation boss is attached to and connected with the installation flange surface. The flow distribution sheet can adopt 3D printing technique to make, including installation annular boss, the upside of installation annular boss is provided with the last flow distribution sheet that extends towards interior, the downside of installation annular boss is provided with the lower flow distribution sheet that extends towards interior, the inlet end of the house steward of intake manifold body is provided with mounting flange face, installation annular boss with mounting flange face interference fit. The splitter plate is a stamping part and is provided with an inward extending wing-shaped plate and a close-fitting plate, and the close-fitting plate is clamped on an installation flange surface of the air inlet end of the main pipe of the air inlet manifold. The cross-sectional thickness of reposition of redundant personnel piece is 2mm. An air inlet system of an aircraft engine comprises the air inlet manifold, the pressure stabilizing box comprises a pressure stabilizing box, an air inlet is formed in the middle of the pressure stabilizing box, air outlets are formed in two ends of the pressure stabilizing box respectively, the air outlets of the pressure stabilizing box are connected with a carburetor respectively, and an outlet of the carburetor is connected with an air inlet end of a main pipe of an air inlet manifold body.

The patent with the application number of CN202010145602.1 and the patent name of 'an air inlet pipeline structure capable of obviously improving the air inlet consistency of an engine' discloses an air inlet pipeline structure capable of obviously improving the air inlet consistency of the engine, which comprises an air inlet connecting pipe and an air inlet header pipe; the intake manifold is arranged in the cylinder cover and is respectively communicated with the intake passages of the cylinders uniformly distributed in the cylinder cover, the intake manifold comprises a flange opening arranged on the side surface of the cylinder cover, and the opening direction of the flange opening is opposite to the inlet direction of the intake passage of each cylinder; the air inlet connecting pipe comprises an air inlet connecting pipe inlet, an air inlet connecting pipe middle part, an air inlet connecting pipe tail part and an air inlet connecting pipe tail end which are communicated in sequence; the middle part of the air inlet connecting pipe is of a first inclined flow guide structure, the sectional area of an inner cavity at the tail part of the air inlet connecting pipe is of a gradually enlarged structure, and one side of the air inlet connecting pipe is provided with a second inclined flow guide structure; each air cylinder air inlet channel is provided with a vortex section, and the inclination directions of the first inclined flow guide structure and the second inclined flow guide structure are the same as the vortex direction of the vortex section; the tail end of the air inlet connecting pipe is provided with a flange face matched with the flange opening, and the flange face is connected with the flange opening in a sealing mode. The inner cavity at the tail part of the air inlet connecting pipe at least covers two air inlet channels of the air cylinder. The distance between the two side wall surfaces of the air inlet main pipe is more than or equal to 2 times of the width of the air inlet channel of the air cylinder. The other side of the tail part of the air inlet connecting pipe, which is opposite to the second inclined flow guide structure, is of an inwards concave spherical structure and a vertical structure which is vertical to the flange surface. The cross section of the air inlet manifold is rectangular or cylindrical.

The two comparison documents still do not completely solve the problem that the air inlet uniformity of each cylinder of the engine is different, so that the work of each cylinder of the engine is inconsistent.

Disclosure of Invention

The invention aims to solve the defects of the background technology and provide an end surface flow guide air inlet pipe structure of an engine, which can effectively meet the air inlet consistency and uniformity of each cylinder.

In order to achieve the purpose, the invention designs an engine end surface flow guide air inlet pipe structure, which comprises an air inlet manifold with an air inlet positioned on the end surface, and is characterized in that: a flow guide pipe is fixed on the inner wall of the air inlet manifold, the air inlet of the flow guide pipe is positioned at one side close to the air inlet of the air inlet manifold, and the air outlet of the flow guide pipe is positioned at one side of the air outlet of the air inlet manifold farthest from the air inlet of the air inlet manifold; and the surface of the flow guide pipe is also provided with a plurality of flow guide pipe gas distributing openings corresponding to the gas outlets of the gas inlet manifold.

Furthermore, the honeycomb duct is for following intake manifold's length direction is fixed in intake manifold top inner wall's straight tube structure.

The honeycomb duct has the following two structure fixed forms:

firstly, the method comprises the following steps: the honeycomb duct is fixed in through the solid fixed ring of arc intake manifold's top inner wall, the solid fixed ring's of arc both ends top surface is fixed in on the top inner wall of intake manifold, the bottom surface of honeycomb duct is fixed in the solid fixed ring's of arc middle part upper surface.

The bottom surface of honeycomb duct is fixed with a plurality ofly along its axial the solid fixed ring of arc.

II, secondly, the method comprises the following steps: the honeycomb duct includes that radial cross-section is curved arc pipe and fixed connection in the connecting plate of the left and right sides top surface of arc pipe, the connecting plate is fixed in on the top inner wall of air intake manifold.

Further, the guide pipe is arranged along the length direction of the intake manifold.

Further, the air inlet of the flow guide pipe and the air outlet of the flow guide pipe are respectively positioned above the air outlet of the air inlet manifold closest to the air inlet of the air inlet manifold and above the air outlet of the air inlet manifold farthest from the air inlet of the air inlet manifold.

Furthermore, the plurality of air distributing openings of the guide pipe are respectively positioned above the air outlets of the plurality of air inlet manifolds, and the opening sizes of the plurality of air distributing openings of the guide pipe are gradually increased in the direction away from the air inlets of the air inlet manifolds.

Preferably, the volume of the flow guide pipe accounts for 20 to 50% of the volume of the intake manifold.

More preferably, the inner diameter of the duct of the flow guide tube is 20 to 30% of the diameter of the air inlet of the intake manifold.

The invention has the beneficial effects that: the air inlet consistency requirement of each cylinder of the engine is met by adding the flow guide device in the air inlet manifold, the flow guide device can be a pipe or a sheet metal part formed by bending, and the mixed air can be guided into one to two cylinders farthest away from the air inlet of the air inlet manifold. The flow guiding device has the following two functions: 1. the air at the air inlet of the air inlet manifold is directly guided to the air outlet of the air inlet manifold behind the air inlet manifold, and the air inlet amount of an engine cylinder body far away from the air inlet manifold is ensured to be equivalent to that of other cylinders; 2. the air outlets of the air inlet manifolds are relatively independent, and the mutual influence is reduced.

Drawings

FIG. 1 is a schematic illustration of an intake manifold of the present invention mounted to an engine;

FIG. 2 is a schematic view of the structure of the flow guide tube disposed in the intake manifold according to the present invention;

FIG. 3 is a longitudinal cross-sectional view of the intake manifold of FIG. 2;

FIG. 4 is a longitudinal cross-sectional view of a flow conduit of the present invention having an alternative configuration for disposition within an intake manifold;

the engine comprises an air inlet manifold, a flow guide pipe, an engine, a gas distribution port of the flow guide pipe, an arc-shaped fixing ring, an arc-shaped pipe and a connecting plate, wherein the air inlet manifold is 1-2-the flow guide pipe, the engine is 3-4-the gas distribution port of the flow guide pipe, the arc-shaped fixing ring is 5-6-the arc-shaped pipe, and the connecting plate is 7-the connecting plate.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The engine end surface flow guide air inlet pipe structure shown in fig. 1-4 comprises an air inlet manifold 1 with an air inlet positioned on the end surface, wherein a flow guide pipe 2 is fixed on the inner wall of the air inlet manifold 1, the air inlet of the flow guide pipe 2 is positioned at one side close to the air inlet of the air inlet manifold 1, and the air outlet of the flow guide pipe 2 is positioned at one side of the air outlet of the air inlet manifold 1 farthest from the air inlet of the air inlet manifold 1; the surface of the draft tube 2 is also provided with a plurality of draft tube air distributing openings 4 corresponding to the air outlets of the air inlet manifold 1. The honeycomb duct 2 is a straight tube structure fixed on the inner wall of the top of the intake manifold 1 along the length direction of the intake manifold 1, and the honeycomb duct 2 is arranged along the length direction of the intake manifold 1.

The honeycomb duct 2 has the following two fixed forms of structure:

1. honeycomb duct 2 is fixed in air intake manifold 1's top inner wall through the solid fixed ring 5 of arc, and on the solid fixed ring 5's of arc both ends top surface was fixed in air intake manifold 1's top inner wall, honeycomb duct 2's bottom surface was fixed in the solid fixed ring 5's of arc middle part upper surface, and honeycomb duct 2's bottom surface has a plurality of solid fixed ring 5 of arc along its axial fixity.

2. The honeycomb duct 2 includes radial cross section for curved arc pipe 6 and fixed connection in the connecting plate 7 of the left and right sides top surface of arc pipe 6, and the connecting plate 7 is fixed in on the top inner wall of air intake manifold 1. As shown in fig. 4, the draft tube 2 may be an isolated cavity surrounded by a formed metal plate, and may be U-shaped, or semicircular, rectangular, or the like.

The air inlet of the flow guide pipe 2 and the air outlet of the flow guide pipe 2 are respectively positioned above the air outlet of the air inlet manifold 1 closest to the air inlet of the air inlet manifold 1 and above the air outlet of the air inlet manifold 1 farthest from the air inlet of the air inlet manifold 1. The plurality of honeycomb duct gas distribution openings 4 are respectively positioned above the gas outlets of the plurality of air inlet manifolds 1, and the opening sizes of the plurality of honeycomb duct gas distribution openings 4 are gradually increased in the direction of the gas inlets far away from the air inlet manifolds 1.

In order to avoid influencing the normal air intake of the air intake manifold 1 and ensure the uniform air supply requirement of the guide pipe 2 to the air outlets of the air intake manifolds 1, the volume of the guide pipe 2 accounts for 20-50% of the volume of the air intake manifold 1. The inner diameter of the honeycomb duct 2 accounts for 20-30% of the aperture of the air inlet manifold 1.

The invention meets the requirement of intake consistency of each cylinder of the engine by adding the flow guide device in the intake manifold 1, the flow guide device can be a pipe or a bent sheet metal part, and only needs to guide the mixed gas to one to two cylinder bodies which are farthest away from the intake port of the intake manifold 1. The flow guiding device has the following two functions: 1. the air at the air inlet of the air inlet manifold 1 is directly guided to the air outlet of the air inlet manifold 1 behind, and the air inflow of the engine cylinder body far away from the air inlet manifold 1 is ensured to be equivalent to that of other cylinders; 2. the air outlets of the air inlet manifolds 1 are relatively independent, and the mutual influence is reduced.

Finally, it should be noted that the above embodiments are merely representative examples of the present invention. It is obvious that the invention is not limited to the above-described embodiments, but that many variations are possible. Any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention should be considered to be within the scope of the present invention. Here, it should be noted that the description of the above technical solutions is exemplary, the present specification may be embodied in different forms, and should not be construed as being limited to the technical solutions set forth herein. Rather, these descriptions are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. Furthermore, the technical solution of the present invention is limited only by the scope of the claims.

The shapes, sizes, ratios, angles, and numbers disclosed to describe aspects of the specification and claims are examples only, and thus are not limited to the details shown. In the following description, when a detailed description of related known functions or configurations is determined to unnecessarily obscure the focus of the present specification and claims, the detailed description will be omitted.

Where the terms "comprising", "having" and "including" are used in this specification, there may be another part or parts unless otherwise stated, and the terms used may generally be singular but may also refer to the plural. It should be noted that although the terms "first," "second," "top," "bottom," "side," "other," "end," "other end," and the like may be used and used in this specification to describe various components, these components and parts should not be limited by these terms. These terms are only used to distinguish one element or section from another element or section. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, with the top and bottom elements being interchangeable or switchable with one another, where appropriate, without departing from the scope of the present description; the components at one end and the other end may be the same or different in performance from one another. Further, in constituting the component, although it is not explicitly described, it is understood that a certain error region is necessarily included.

The features of the various embodiments of the present invention may be partially or fully combined or spliced with each other and performed in a variety of different configurations as would be well understood by those skilled in the art. Embodiments of the invention may be performed independently of each other or may be performed together in an interdependent relationship.

Claims

1. The utility model provides an engine end surface water conservancy diversion air intake pipe structure, includes that the air inlet is located air intake manifold (1) of terminal surface, its characterized in that: a flow guide pipe (2) is fixed on the inner wall of the air inlet manifold (1), the air inlet of the flow guide pipe (2) is positioned at one side close to the air inlet of the air inlet manifold (1), and the air outlet of the flow guide pipe (2) is positioned at one side of the air outlet of the air inlet manifold (1) farthest from the air inlet of the air inlet manifold (1); the surface of the draft tube (2) is also provided with a plurality of draft tube gas distributing openings (4) corresponding to the gas outlets of the gas inlet manifold (1);

the plurality of guide pipe air distribution openings (4) are respectively positioned above the air outlets of the plurality of air inlet manifolds (1), and the opening sizes of the plurality of guide pipe air distribution openings (4) are gradually increased in the direction far away from the air inlets of the air inlet manifolds (1);

the volume of the draft tube (2) accounts for 20-50% of the volume of the intake manifold (1); the inner diameter of the honeycomb duct (2) accounts for 20-30% of the air inlet caliber of the air inlet manifold (1).

2. The engine end face flow guide intake pipe structure according to claim 1, wherein: the flow guide pipe (2) is of a straight pipe structure fixed on the inner wall of the top of the air inlet manifold (1) along the length direction of the air inlet manifold (1).

3. The engine end face flow guide intake pipe structure according to claim 2, wherein: honeycomb duct (2) are fixed in through the solid fixed ring of arc (5) the top inner wall of air intake manifold (1), the both ends top surface of the solid fixed ring of arc (5) is fixed in on the top inner wall of air intake manifold (1), the bottom surface of honeycomb duct (2) is fixed in the middle part upper surface of the solid fixed ring of arc (5).

4. The engine end face flow guide intake pipe structure according to claim 3, wherein: the bottom surface of honeycomb duct (2) is fixed with a plurality ofly along its axial gu fixed ring (5).

5. The engine end face flow guide intake pipe structure according to claim 1, wherein: the flow guide pipe (2) comprises an arc-shaped pipe (6) with an arc-shaped radial section and a connecting plate (7) fixedly connected to the top surfaces of the left side and the right side of the arc-shaped pipe (6), and the connecting plate (7) is fixed on the inner wall of the top of the air inlet manifold (1).

6. The engine end face nozzle intake pipe structure according to claim 5, wherein: the guide pipe (2) is arranged along the length direction of the air inlet manifold (1).

7. The engine end-face inducer intake duct structure of claim 1, wherein: the air inlet of the flow guide pipe (2) and the air outlet of the flow guide pipe (2) are respectively positioned above the air outlet of the air inlet manifold (1) closest to the air inlet of the air inlet manifold (1) and above the air outlet of the air inlet manifold (1) farthest from the air inlet of the air inlet manifold (1).