CN217233677U

CN217233677U - Air inlet noise eliminator of commercial vehicle engine

Info

Publication number: CN217233677U
Application number: CN202220396797.1U
Authority: CN
Inventors: 王强; 曾贤; 杨含笑; 史季青
Original assignee: Shaanxi Automobile Group Co Ltd
Current assignee: Shaanxi Automobile Group Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-08-19
Anticipated expiration: 2032-02-25

Abstract

The utility model relates to an air inlet muffler device of a commercial vehicle engine, which comprises a main supercharger air inlet pipe and a quarter-wave pipe communicated with the main supercharger air inlet pipe, wherein the quarter-wave pipe is a branch pipe of the main supercharger air inlet pipe; the booster admits air and is responsible for the head end and is connected with empty filter outlet duct, and the end is connected with the booster connecting pipe, quarter wavelength pipe head end fixed connection to in the middle of the booster admits air and is responsible for, the end seals. The utility model discloses an increase quarter wave pipe mode on the booster is admitted air and is responsible for, realize eliminating air intake system's resonance noise under the condition that does not increase the resistance of admitting air.

Description

Air inlet silencing device for commercial vehicle engine

Technical Field

The utility model relates to an automobile power system technical field, concretely relates to commercial car engine noise eliminator that admits air.

Background

Due to the structural characteristics of the diesel engine of the national overweight truck, when the engine works, pressure pulses can be formed in an air inlet pipe of the engine due to the periodic movement of a valve actuating mechanism, and periodic pulse noise is generated. When the pulse frequency is consistent with the natural frequency of the air column in the air inlet pipe, resonance noise is formed. In the prior art, a silencing element in an air inlet system of a heavy commercial truck only has an air filter, noise reduction performance is not obvious enough, noise with specific frequency cannot be reduced, the air inlet flow demand of an engine of the heavy commercial truck is high, and under the condition of large flow, if a conventional expanding silencer is added on an air inlet pipeline, air inlet resistance is increased rapidly, and negative effects are caused on the dynamic property and the economical efficiency of the engine.

SUMMERY OF THE UTILITY MODEL

The utility model provides a commercial car engine noise eliminator that admits air has effectively solved among the prior art air intake system noise elimination ability not enough, can't fall the problem of making an uproar to specific frequency, and this air inlet noise eliminator does not increase the resistance of admitting air simultaneously.

In order to solve the problems in the background art, the utility model discloses a realize through following technical scheme:

the utility model provides a commercial car engine noise eliminator that admits air, includes booster inlet main pipe and quarter wave pipe rather than communicating, quarter wave pipe is the branch pipe of booster inlet main pipe; the head end of the supercharger air inlet main pipe is connected with the air outlet pipe of the air filter, the tail end of the supercharger air inlet main pipe is connected with the supercharger connecting pipe, the head end of the quarter-wavelength pipe is fixedly connected to the middle of the supercharger air inlet main pipe, and the tail end of the quarter-wavelength pipe is sealed.

As a further explanation of the utility model: the supercharger air inlet main pipe is in an arc shape with uniform diameter change in the whole section, and the diameter of the supercharger air inlet main pipe is uniformly reduced from the head end to the tail end.

As a further explanation of the utility model: the quarter wave pipe is L-shaped and comprises an arc-shaped part and a straight pipe part, the arc-shaped part is connected with the supercharger air inlet main pipe, and the tail end of the straight pipe part is closed; the whole section of the quarter-wave tube is of the same diameter, and the diameter of the quarter-wave tube is smaller than half of the maximum diameter of the main air inlet pipe of the supercharger; the central lines of the two pipes at the joint of the quarter-wave pipe and the air inlet main pipe of the supercharger are mutually vertical.

As a further explanation of the utility model: the equivalent length of the quarter wave tube is 654 mm.

As a further explanation of the utility model: the tail end of the quarter-wave tube is provided with a quarter-wave tube mounting seat, the quarter-wave tube mounting seat is integrally connected with the quarter-wave tube, a mounting hole is formed in the quarter-wave tube mounting seat, and a metal bushing is arranged on the inner wall of the mounting hole.

As a further explanation of the utility model: the corrugated pipe installing seat is fixedly installed on the support, and a rubber pad is arranged between the corrugated pipe installing seat and the support.

As a further explanation of the utility model: and the joint of the quarter wave tube and the supercharger air inlet main pipe adopts a transition fillet with the radius of 30 mm.

As a further explanation of the utility model: the booster admits air and is responsible for the head end with empty filter outlet duct clamp connection, the end with booster connecting pipe clamp connection.

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

1) the utility model discloses increase the quarter wave pipe of one section specific length on the person in charge that admits air between empty filter and engine, the sound wave offsets mutually with the same frequency sound wave in the person in charge after the quarter wave intraductal reflection of pipe, plays the effect that weakens air intake system resonance noise.

2) The utility model discloses can not increase the resistance of admitting air when reducing resonance noise.

Drawings

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

FIG. 2 is a schematic view of the installation of the present invention;

fig. 3 is a schematic view of the quarter-wave tube mounting base of the present invention.

Description of the reference numerals

1. A supercharger air inlet main pipe; 2. a quarter wave tube; 3. a wavelength tube mounting base; 4. mounting holes; 5. an air outlet pipe of the air filter; 6. a supercharger connecting pipe; 7. a support; 8. and (7) a rubber pad.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more clearly understood, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1 to 3, an embodiment of the present invention discloses an air intake silencer for a commercial vehicle engine, which includes a main supercharger air intake pipe 1 and a quarter-wave pipe 2 communicated with the main supercharger air intake pipe, wherein the quarter-wave pipe 2 is a branch pipe of the main supercharger air intake pipe 1; the head end of the main supercharger air inlet pipe 1 is connected with the air filter air outlet pipe 5, the tail end of the main supercharger air inlet pipe 1 is connected with the supercharger connecting pipe 6, the head end of the quarter wave tube 2 is fixedly connected to the middle of the main supercharger air inlet pipe 1, and the tail end of the main supercharger air inlet pipe is sealed.

The length of the quarter wave tube 2 is specified and its equivalent length is 654 mm. By adding a quarter wave tube 2 with the equivalent length of 654mm to a supercharger air inlet main pipe 1, resonance noise with the frequency of 130Hz caused by engine air inlet can be weakened, and the noise elimination principle is as follows: when the sound wave with the frequency of 130Hz is transmitted along the main air inlet pipe 1 of the supercharger, a part of the sound wave enters the quarter-wave pipe 2 and is reflected by the closed tail end, the frequency of the sound wave reflected back to the main pipe is unchanged, the phase position of the sound wave is opposite to that of the incident wave in the main pipe, and the sound wave and the incident wave are just counteracted to play a role in eliminating noise with specific frequency.

In the embodiment, the quarter-wave tube 2 is a bypass tube on the main air inlet pipe 1 of the supercharger, so that the air inlet noise is reduced, and the resistance of an air inlet system is not increased.

The supercharger air inlet main pipe 1 is in an arc shape with uniform diameter change in the whole section, and the diameter is uniformly reduced from the head end to the tail end. The diameter of the interface between the supercharger air inlet main pipe 1 and the air filtering air pipe 5 is larger than that of the interface between the supercharger air inlet main pipe and the supercharger connecting pipe 6.

The quarter wave tube 2 is L-shaped and comprises an arc-shaped part and a straight tube part, the arc-shaped part is connected with the supercharger air inlet main tube 1, and the tail end of the straight tube part is closed; the whole section of the quarter-wave tube 2 has the same diameter, and the diameter of the quarter-wave tube is smaller than half of the maximum diameter of the supercharger air inlet main tube 1; the central lines of the two pipes at the joint of the quarter wave pipe 2 and the main air inlet pipe 1 of the supercharger are vertical to each other.

The head end of the supercharger air inlet main pipe 1 is connected with the air filter air outlet pipe 5 and is clamped tightly by a clamp; the tail end of the connecting pipe is connected with the supercharger connecting pipe 6 and is clamped by a clamp.

The quarter-wave tube 2 is fixedly connected to the tube wall in the middle of the supercharger air inlet main tube 1, the joint of the tube wall adopts a transition fillet with the radius of 30mm, and the whole part is integrally formed by adopting a rotational molding process, so that smooth transition is ensured.

The tail end of the quarter wave tube 2 is provided with a wavelength tube mounting seat 3, the wavelength tube mounting seat 3 is integrally connected with the quarter wave tube 2, a mounting hole 4 is formed in the wavelength tube mounting seat 3, and a metal bushing is mounted on the inner wall of the mounting hole 4. The wavelength tube mounting base 3 and the quarter-wave tube 2 are integrally formed.

The novel waveguide tube fixing device is characterized by further comprising a support 7, the waveguide tube mounting base 3 is fixedly mounted on the support 7, and a rubber pad is arranged between the waveguide tube mounting base 3 and the support 7.

In the embodiment, the central lines of the joints of the quarter-wave tube 2 and the supercharger air inlet main tube 1 are mutually vertical, the whole sections of the quarter-wave tube are equal in diameter, the joint of the tube walls is provided with a transition fillet of 30mm, and the whole parts are integrally formed by adopting a rotational molding process.

As shown in fig. 3, in this embodiment, a wavelength tube mounting base 3 is added at the end of the wavelength tube to fix the quarter-wave tube 2, the wavelength tube mounting base 3 is connected with a bracket 7 through a rubber pad 8, and a metal bushing is installed on the inner wall of the mounting hole 4, so as to enhance the connection strength with the corresponding pipeline.

The present invention is not limited to the above-mentioned optional embodiments, and any other products in various forms can be obtained by anyone under the teaching of the present invention, and any changes in the shape or structure thereof, all the technical solutions falling within the scope of the present invention, are within the protection scope of the present invention.

Claims

1. The utility model provides a commercial car engine noise eliminator that admits air which characterized in that: the turbocharger air inlet device comprises a supercharger air inlet main pipe (1) and a quarter-wave pipe (2) communicated with the supercharger air inlet main pipe, wherein the quarter-wave pipe (2) is a branch pipe of the supercharger air inlet main pipe (1); the booster admits air and is responsible for (1) the head end and is connected with empty filter outlet duct (5), and the end is connected with booster connecting pipe (6), quarter wave tube (2) head end fixed connection to the booster admits air and is responsible for in the middle of (1), the end seals.

2. The commercial vehicle engine air intake silencer assembly of claim 1, wherein: the supercharger air inlet main pipe (1) is in an arc shape with uniform diameter change in the whole section, and the diameter is uniformly reduced from the head end to the tail end.

3. The commercial vehicle engine air intake silencer assembly of claim 1, wherein: the quarter wave tube (2) is L-shaped and comprises an arc-shaped part and a straight tube part, the arc-shaped part is connected with the supercharger air inlet main tube (1), and the tail end of the straight tube part is closed; the whole section of the quarter-wave tube (2) is of the same diameter, and the diameter of the quarter-wave tube is smaller than half of the maximum diameter of the supercharger air inlet main tube (1); the central lines of the two pipes at the joint of the quarter-wave pipe (2) and the main supercharger air inlet pipe (1) are perpendicular to each other.

4. The intake silencer assembly of a commercial vehicle engine as claimed in claim 3, wherein: the equivalent length of the quarter-wave tube (2) is 654 mm.

5. The commercial vehicle engine air intake silencer assembly of claim 2, wherein: quarter wave pipe (2) end is provided with wave pipe mount pad (3), wave pipe mount pad (3) with quarter wave pipe (2) body coupling, be provided with mounting hole (4) on wave pipe mount pad (3), metal bush is equipped with to mounting hole (4) inner wall.

6. The commercial vehicle engine air intake silencer assembly of claim 5, wherein: the corrugated pipe installing seat is characterized by comprising a support (7), the corrugated pipe installing seat (3) is fixedly installed on the support (7), and a rubber pad is arranged between the corrugated pipe installing seat (3) and the support (7).

7. The commercial vehicle engine air intake silencer assembly of claim 1, wherein: the joint of the quarter wave tube (2) and the supercharger air inlet main pipe (1) adopts a transition fillet with the radius of 30 mm.

8. The commercial vehicle engine air intake silencer assembly of claim 1, wherein: the booster admits air and is responsible for (1) the head end with empty filter outlet duct (5) clamp connection, the end with booster connecting pipe (6) clamp connection.