Gas inlet pipe of natural gas engine

Abstract

The utility model relates to the field of air inlet pipes of engines, in particular to an air inlet pipe of a natural gas engine, which comprises an air inlet pipe and a first air inlet pipe connecting pipe. The air inlet pipe of the natural gas engine is characterized in that the first air inlet pipe connecting pipe is communicated with the air inlet pipe, the air inlet pipe of the natural gas engine further comprises a second air inlet pipe connecting pipe, and a turbulent flow component is arranged between the first air inlet pipe connecting pipe and the second air inlet pipe connecting pipe. Due to the fact that in the prior art, the problem that water vapor in air is carried during air inlet of an air inlet pipe is difficult to eradicate, the air inlet uniformity of the air inlet pipe needs to be considered, and the problem that the water vapor carried by air inlet of the air inlet pipe to the uniformity of all cylinders needs to be improved needs to be considered.

Description

Technical Field

[0001] The utility model relates to the field of engine intake pipes, in particular to an intake pipe for a natural gas engine. Background Art

[0002] The intake pipe of a natural gas engine will carry water vapor in the air during the intake process, thus causing the engine to misfire. Because the problem of the intake pipe carrying water vapor in the air during intake is difficult to eliminate in the prior art, it is necessary not only to consider the intake uniformity of the intake pipe, but also to consider improving the uniformity of the intake pipe carrying water vapor to each cylinder.

[0003] A natural gas engine intake pipe is proposed, which can not only meet the power performance of the original engine but also improve the uniformity of water vapor carried by the intake pipe to each cylinder with minor changes to the original engine. Utility Model Content

[0004] The purpose of the utility model is to provide an intake pipe for a natural gas engine to solve the problem that the intake pipe of the natural gas engine at the current stage will carry water vapor in the air during the intake process, thereby causing the engine to misfire. Because the problem of the intake pipe carrying water vapor in the air during intake in the prior art is difficult to eliminate, it is necessary to consider not only the intake uniformity of the intake pipe, but also the problem of improving the uniformity of the intake pipe carrying water vapor to each cylinder. The technical solution adopted by the utility model is as follows:

[0005] A natural gas engine intake pipe, comprising an intake pipe and a first intake pipe pipe, the intake pipe is provided with a plurality of intake ports, the plurality of intake ports are connected to the engine cylinder head through flanges, the first intake pipe pipe is connected to the intake pipe, and further comprising a second intake pipe pipe, a spoiler is provided between the first intake pipe pipe and the second intake pipe pipe

[0006] It is further defined that a spoiler installation groove is provided on the first intake pipe connecting pipe, the spoiler installation groove is located at the connection between the first intake pipe connecting pipe and the second intake pipe connecting pipe, and the spoiler component is installed in the spoiler installation groove.

[0007] It is further defined that the spoiler component includes a spoiler wheel and a spoiler spoke, the spoiler spoke is installed in the spoiler wheel to form a hub shape, the diameter of the spoiler mounting groove is D, the diameter of the spoiler wheel is d, and the spoiler wheel is installed in the spoiler mounting groove by interference fit.

[0008] It is further defined that the distance between the right end surface of the spoiler wheel and the right end surface of the spoiler mounting groove is L, and the size of L is 3mm-6mm.

[0009] It is further defined that the distance between the right end surface of the spoiler wheel and the right end surface of the spoiler mounting groove is L, and the size of L is 5 mm.

[0010] It is further defined that the first air intake pipe connecting pipe and the second air intake pipe connecting pipe are connected via an O-ring.

[0011] The beneficial effects of the utility model compared with the current technology are:

[0012] A spoiler component is installed between the first intake pipe connecting pipe and the second intake pipe connecting pipe. When air is taken in by the intake pipe, the spoiler rotates, which will accelerate the rotation of water particles and move close to the inner side of the bend in the intake pipe connecting pipe. After the disturbance, a large number of water particles will hit the wall, and the total water intake will be reduced, and the water intake of each cylinder will be more even. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a main schematic diagram of the utility model;

[0014] Figure 2 for Figure 1 AA section view;

[0015] Figure 3 is a three-dimensional schematic diagram of a spoiler component;

[0016] Figure 4 A partial cross-sectional schematic diagram of the coordination between the spoiler component and the first intake pipe connection pipe;

[0017] Figure 5 This is a data chart of the experimental effects of the end 1 technical solution, the end 2 technical solution, and the end 3 technical solution.

[0018] The markings in the figure correspond respectively to: 1-intake pipe, 2-first intake pipe connecting pipe, 3-air inlet, 4-second intake pipe connecting pipe, 5-spoiler mounting groove, 6-spoiler component, 61-spoiler wheel, 62-spoiler spoke, 7-O-ring. DETAILED DESCRIPTION

[0019] In order to enable those skilled in the art to better understand the technical solution of the utility model, the technical solution of the utility model is further described below in conjunction with the accompanying drawings and embodiments. Example

[0020] like Figure 1-Figure 5As shown, a natural gas engine intake pipe includes an intake pipe 1 and a first intake pipe pipe 2, six intake ports 3 are arranged on the intake pipe, and the six intake ports 3 are all connected to the engine cylinder head through flanges. The first intake pipe pipe 2 is connected to the intake pipe 1, and also includes a second intake pipe pipe 4, an O-ring groove is arranged on the second intake pipe pipe 4, an O-ring 7 is arranged in the O-ring groove, the first intake pipe pipe 2 and the second intake pipe pipe 4 are connected through the O-ring 7, a spoiler installation groove 5 is arranged on the first intake pipe pipe 1, the spoiler installation groove 5 is located at the connection between the first intake pipe pipe 2 and the second intake pipe pipe 4, and a spoiler component 6 is arranged in the spoiler installation groove 5.

[0021] The spoiler component includes a spoiler wheel 61 and a spoiler spoke 62. There are six spoiler spokes 62, which are evenly arranged in the spoiler wheel 61. The spoiler component 6 is hub-shaped. The diameter of the spoiler mounting groove 6 is D, and the diameter of the spoiler wheel 61 is d. The spoiler wheel 61 is installed in the spoiler mounting groove 5 by interference fit. The distance between the right end face of the spoiler wheel 61 and the right end face of the spoiler mounting groove 5 is L, and the size of L is 5 mm, which is conducive to the backflow of the spoiler component.

[0022] In practice, the evaluation index is: the proportion of water inflow into each cylinder to the total water inflow. In one cycle, the difference in water volume entering each cylinder is reflected by the ratio of water inflow into each cylinder to the total water inflow.

[0023] During installation, the spoiler component 6 can be installed at the interface between the intake pipe 1 and the first intake pipe pipe 2, which is the end 1 technical solution. The spoiler component 6 is installed at the end surface of the second intake pipe pipe 4, which is the end 2 technical solution. In the technical solution of the present utility model, the spoiler component 6 is installed at the middle position of the connection between the first intake pipe pipe 2 and the second intake pipe pipe 4, which is the end 3 technical solution. The three solutions are used to compare the proportion of water intake of each cylinder. Since the engine is a six-cylinder engine, in the chart, C1-C6 are used to represent the proportion of water intake of the engine from cylinder 1 to cylinder 4, respectively. For 6 cylinders, the water intake of C6 in the end 1 technical solution accounts for the highest proportion of about 33%, the water intake of C6 in the end 2 solution accounts for the highest proportion of about 40.1%, and the water intake of C4 in the end 3 technical solution disclosed in the utility model accounts for the highest proportion of about 34%. The uniformity of the maximum cylinder is better when the proportion is lower than 30%, and the uniformity is poor when the proportion is higher than 40%. In the technical solution of the utility model, the spoiler component will accelerate the rotation of water particles, and they will move close to the inner side of the bend in the connecting pipe. After the disturbance, a large number of water particles will hit the wall, and the total water intake will be reduced, and the water intake of each cylinder will account for a more uniform proportion.

[0024] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "first", "second", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0025] The above is a detailed introduction to a natural gas engine intake pipe provided by the utility model. The description of the specific embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the utility model, several improvements and modifications can be made to the utility model, and these improvements and modifications also fall within the protection scope of the claims of the utility model.

Claims

1. An intake pipe for a natural gas engine, comprising an intake pipe (1) and a first intake pipe connecting pipe (2), wherein the intake pipe (1) is provided with a plurality of intake ports (3), wherein the plurality of intake ports (3) are all connected to an engine cylinder head via a flange, and wherein: The first air intake pipe connecting pipe (2) is connected to the air intake pipe (1), and also includes a second air intake pipe connecting pipe (4). A spoiler component (6) is provided between the first air intake pipe connecting pipe (2) and the second air intake pipe connecting pipe (4).

2. The natural gas engine intake pipe according to claim 1, characterized in that: A spoiler installation groove (5) is provided on the first air intake pipe connecting pipe (2), the spoiler installation groove (5) is located at the connection between the first air intake pipe connecting pipe (2) and the second air intake pipe connecting pipe (4), and the spoiler component (6) is installed in the spoiler installation groove (5).

3. The natural gas engine intake pipe according to claim 2, characterized in that: The spoiler component (6) comprises a spoiler wheel (61) and a spoiler spoke (62); the spoiler spoke (62) is mounted inside the spoiler wheel (61) to form a hub shape; the diameter of the spoiler mounting groove (5) is D; the diameter of the spoiler wheel (61) is d; the spoiler wheel (61) is mounted inside the spoiler mounting groove (5) by means of an interference fit.

4. The natural gas engine intake pipe according to claim 3, characterized in that: The distance between the right end surface of the spoiler wheel (61) and the right end surface of the spoiler mounting groove (5) is L, and the size of L is 3 mm-6 mm.

5. The natural gas engine intake pipe according to claim 4, characterized in that: The distance between the right end surface of the spoiler wheel (61) and the right end surface of the spoiler mounting groove (5) is L, and the size of L is 5 mm.

6. The natural gas engine intake pipe according to claim 1, characterized in that: The first air intake pipe connecting pipe (2) and the second air intake pipe connecting pipe (4) are connected via an O-ring (7).

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