CN218816703U

CN218816703U - Air inlet silencing system of engine

Info

Publication number: CN218816703U
Application number: CN202320096166.2U
Authority: CN
Inventors: 刘伶俐; 朱波; 袁彬; 王义超
Original assignee: Chongqing Zongshen General Power Machine Co Ltd
Current assignee: Chongqing Zongshen General Power Machine Co Ltd
Priority date: 2023-02-01
Filing date: 2023-02-01
Publication date: 2023-04-07
Anticipated expiration: 2033-02-01

Abstract

The utility model discloses an engine amortization system that admits air, including empty filter, resonance silencer and breather pipe, the one end of breather pipe is connected with the gas outlet of empty filter, the other end of breather pipe is connected with resonance silencer's air inlet, the breather pipe has the abrupt change portion of buckling the setting. Through this scheme of adoption has solved among the prior art engine air intake noise cancelling system still has great intake vortex noise and resonance cavity resonance noise and leads to the not good problem of noise reduction effect.

Description

Air inlet silencing system of engine

Technical Field

The utility model relates to an engine air intake system specifically is an engine amortization system that admits air.

Background

An engine intake silencer system is a structure mounted on an intake system of an engine for reducing intake noise.

Chinese patent document CN206972409U discloses an engine silencing air intake system, including: the air inlet of the carburetor is connected with a silencing resonant cavity assembly, and the silencing resonant cavity assembly is connected with a silencing air filter; the silencing resonant cavity assembly comprises a resonant cavity body and a resonant cavity cover, wherein a resonant cavity air inlet channel connected with the silencing air filter and a resonant cavity air outlet connected with the air outlet of the carburetor are arranged on the resonant cavity body, and a silencing filter element is also arranged between the resonant cavity body and the resonant cavity cover; the silencing air filter comprises an air filter body and an air filter cover, wherein an expansion energy dissipation cavity is arranged at the upper part of the air filter body, an air filter air inlet is arranged at the lower part of the air filter body, and a filter element is arranged between the expansion energy dissipation cavity and the air filter cover; the air filter body is provided with an air filter air outlet channel communicated with the expansion energy dissipation cavity, a baffle plate arranged close to an air outlet of the air filter air outlet channel is arranged in the expansion energy dissipation cavity, the baffle plate is positioned on one side of the filter element facing the air filter body, and the air filter air outlet channel is communicated with the resonant cavity air inlet channel. Although the noise reduction air inlet system has a certain noise reduction effect, the noise reduction air inlet system still has strong air inlet vortex noise and resonance cavity resonance noise when in use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a better engine amortization system that admits air of noise reduction effect.

In order to achieve the above object, the utility model discloses a basic scheme provides an engine amortization system that admits air, including empty filter, resonance silencer and breather pipe, the one end of breather pipe is connected with the gas outlet of empty filter, the other end of breather pipe is connected with resonance silencer's air inlet, the breather pipe has the abrupt change portion of buckling the setting.

The beneficial effect of this basic scheme lies in: through set up the abrupt commentaries on classics portion of buckling on the breather pipe, compare with prior art, effectively improved whole air intake noise cancelling system's noise reduction effect.

Further, the direction of the air outlet of the air filter and the direction of the air inlet of the resonance silencer are perpendicular to each other. By adopting the arrangement, the vent pipe can naturally form a bent protruding part when being connected with the air outlet of the air filter and the air inlet of the resonance silencer, so that the vent pipe does not need to be processed independently to form the protruding part, and the structure is simplified and the convenience of assembly and processing is improved while the noise reduction effect of the whole system is ensured.

Further, the resonance silencer comprises a cavity formed by a silencer body part and a silencer cover part, a plurality of first rib parts are arranged on the inner wall of the silencer body part in a protruding mode, a plurality of second rib parts are arranged on the inner wall of the silencer cover part in a protruding mode, and the first rib parts and the second rib parts are arranged in a staggered mode and form a labyrinth-shaped airflow channel in the cavity. By adopting the arrangement, the vortex sound of the whole system and the seating sound of the engine valve during use are further reduced, the strength of the resonance silencer is enhanced, the resonance sound of the resonance silencer is further reduced, and the noise reduction effect of the whole system is further improved.

Further, the air inlet and the air outlet of the resonance silencer are arranged on the silencer body, and a first cavity at least partially surrounding the air inlet and a second cavity at least partially surrounding the air outlet are formed in the silencer body through the first ribs. By adopting the arrangement, the vortex sound and the engine valve seating sound transmitted by the whole system are further reduced, so that the noise reduction effect of the whole system is further improved.

Further, the air outlet of the resonance silencer is far away from the air inlet of the resonance silencer. By adopting the arrangement, the airflow path in the resonance silencer is effectively prolonged, so that the intake airflow sound is reduced while the seating sound of the valve is shielded, and the noise reduction effect of the whole system is further improved.

Further, a partition plate is arranged in the inner cavity of the air filter and is parallel to the direction of the air outlet, the partition plate divides the inner cavity of the air filter into an air inlet cavity communicated with the air inlet of the air filter and an air outlet cavity communicated with the air outlet of the air filter, an air vent is arranged at one end, away from the air outlet, of the partition plate, and a filter element is arranged in the air inlet cavity. By adopting the arrangement, the air flow path inside the air filter can be prolonged, so that the noise is further reduced and is transmitted out from the air outlet of the air filter, and the noise reduction effect of the whole system is further improved.

Drawings

Fig. 1 is a schematic diagram of an embodiment of an intake silencing system of an engine according to the present invention;

FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a sectional view taken along line B-B of FIG. 1;

FIG. 4 is a schematic view of the muffler body of the resonant muffler of FIG. 1;

fig. 5 is a schematic view showing a structure of a muffler cover portion of the resonance muffler of fig. 1.

Detailed Description

The following is further detailed by way of specific embodiments:

reference numerals in the drawings of the specification include: the air filter comprises an air filter 1, an air filter cover body 11, a filter element 12, an air inlet cavity 13, an air outlet cavity 14, an air filter body 15, a partition plate 16, a vent hole 161, an air outlet 17 of the air filter, an air inlet 18 of the air filter, a resonance silencer 2, a silencer body 21, a first rib part 211, a first cavity 212, an air inlet 213 of the resonance silencer, a second cavity 214, an air outlet 215 of the resonance silencer, a silencer cover part 22, a second rib part 221, a vent pipe 3 and a rotary portion 31.

The embodiment is substantially as shown in the accompanying figures 1 to 5: an engine intake silencing system comprises an air filter 1 and a resonance silencer 2, wherein an air outlet 17 of the air filter is communicated with an air inlet 213 of the resonance silencer through a vent pipe 3, and the vent pipe 3 is provided with a bent protruding rotation part 31. In this embodiment, the outlet 17 of the air filter and the inlet 213 of the resonance muffler are perpendicular to each other, so that the vent pipe naturally forms a 90 ° bent protruding portion when assembled. In this embodiment, the air filter 1 includes an air filter body 15 and an air filter cover 11 that are fastened to each other to form an internal cavity of the air filter 1, an air outlet 17 of the air filter is disposed on the air filter body 15, and an air inlet 18 of the air filter is disposed on the air filter cover 11; a clapboard 16 is arranged in an inner cavity of the air filter 1, the clapboard 16 is arranged in parallel to the direction of an air outlet 17 of the air filter, the clapboard 16 is fixedly connected with an air filter body 15, and the clapboard 16 divides the inner cavity of the air filter 1 into an air inlet cavity 13 communicated with an air inlet 18 of the air filter and an air outlet cavity 14 communicated with the air outlet 17 of the air filter; the end of the partition 16 away from the air outlet 17 of the air filter is provided with a vent hole 161 for communicating the air inlet chamber 13 with the air outlet chamber 14, and the filter element 12 is arranged in the air inlet chamber 13.

In the present embodiment, the resonance muffler 2 includes a cavity formed by the muffler body 21 and the muffler cover 22, a plurality of first ribs 211 are protrudingly provided on the inner wall of the muffler body 21, specifically, four first ribs 211 are provided, and each first rib 211 extends substantially toward the middle of the edge of the muffler body 21; a plurality of second rib parts 221 are convexly arranged on the inner wall of the muffler cover part 22, specifically, the number of the second rib parts 221 is four, and each second rib part 221 extends from the middle of the muffler cover part 22 to the corner of the peripheral edge; when the muffler body 21 is engaged with the muffler cover 22, the first ribs 211 and the second ribs 221 are alternately arranged to form a labyrinth-shaped airflow channel in the cavity. The outlet 215 of the resonant muffler is disposed away from the inlet 213 of the resonant muffler. The inlet 213 and the outlet 215 of the resonance muffler are both provided on the muffler body 21, and the muffler body 21 is formed with a first cavity 212 at least partially surrounding the inlet 213 and a second cavity 214 at least partially surrounding the outlet 215 by the first beads 211.

The specific implementation process is as follows: air enters the air filter 1 from the air inlet 18 of the air filter, passes through the filter element 12, enters the air outlet cavity 14 of the air filter 1 from the vent holes 161 on the partition plate 16, then enters the air outlet 17 of the air filter, enters the resonance silencer 2 through the vent pipe 3, and finally enters the air outlet 215 of the resonance silencer through the labyrinth-shaped air flow channel in the resonance silencer 2. When the air current flows in the whole system, vortex sound and resonance noise of the resonant cavity transmitted by the system are small, and compared with a silencing system in the prior art, the noise reduction effect is improved.

The above description is only an example of the present invention, and the common general knowledge of the known specific structures and characteristics of the embodiments is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent.

Claims

1. The utility model provides an engine amortization system that admits air, includes empty filter, resonance silencer and breather pipe, the one end of breather pipe is connected with the gas outlet of empty filter, the other end of breather pipe is connected with resonance silencer's air inlet, its characterized in that: the breather pipe has the abrupt change portion of buckling the setting.

2. The engine intake silencing system of claim 1, wherein: the direction of the air outlet of the air filter is perpendicular to the direction of the air inlet of the resonance silencer.

3. An engine intake silencing system according to claim 1 or 2, wherein: the resonance silencer comprises a cavity formed by a silencer body part and a silencer cover part, a plurality of first rib parts are arranged on the inner wall of the silencer body part in a protruding mode, a plurality of second rib parts are arranged on the inner wall of the silencer cover part in a protruding mode, and the first rib parts and the second rib parts are arranged in a staggered mode and form a labyrinth-shaped airflow channel in the cavity.

4. The engine intake silencing system of claim 3, wherein: the air inlet and the air outlet of the resonance silencer are arranged on the silencer body, and a first cavity at least partially surrounding the air inlet and a second cavity at least partially surrounding the air outlet are formed in the silencer body through first ribs.

5. The engine intake silencing system of claim 4, wherein: and the air outlet of the resonance silencer is far away from the air inlet of the resonance silencer.

6. An engine intake silencing system according to claim 1, 2, 4 or 5, wherein: the air filter is characterized in that a partition plate is arranged in an inner cavity of the air filter and is parallel to the direction of the air outlet, the partition plate divides the inner cavity of the air filter into an air inlet cavity communicated with an air inlet of the air filter and an air outlet cavity communicated with the air outlet of the air filter, an air vent is arranged at one end, away from the air outlet, of the partition plate, and a filter element is arranged in the air inlet cavity.

7. The engine intake silencing system of claim 3, wherein: the air filter is characterized in that a partition plate is arranged in an inner cavity of the air filter and is parallel to the direction of the air outlet, the partition plate divides the inner cavity of the air filter into an air inlet cavity communicated with an air inlet of the air filter and an air outlet cavity communicated with the air outlet of the air filter, an air vent is arranged at one end, away from the air outlet, of the partition plate, and a filter element is arranged in the air inlet cavity.