CN201381887Y - Duct-type microporous arc engine muffler - Google Patents

Abstract

The utility model discloses a duct-type microporous arc engine muffler, which comprises a cylinder shell whose bottom surface protrudes outwards in an arc shape, and a baffle, an intake pipe, vent pipes and an escape pipe, which are connected with the shell through flanges, wherein the baffle can divide the inner cavity of the shell into a front cavity and a rear cavity, the intake pipe penetrates through and is fixedly connected on the shell, and extends to the front cavity of the shell, and the part of the intake pipe outside the shell is connected with a bent pipe of an engine for discharging exhaust gas through a flange. A plurality of the vent pipes penetrate through and are fixed on the arc baffle to communicate the front cavity and the rear cavity, and the escape pipe penetrates through and is fixed on the shell, and can extend to the rear cavity of the shell, the end surfaces of the part of the intake pipe in the front cavity and the parts of the vent pipes and the escape pipes in the rear cavity are sealed, and micropores are evenly distributed on the walls of the pipes. The muffler has excellent noise reduction effect, reduces the oil consumption of the engine, and has simple structure and few consumed material.

Description

A kind of pipe type micropore arc muffler for motor

Technical field

It is the motor noise reduction technical field of characteristics that the utility model relates to the noise reduction method, is specially a kind of pipe type micropore arc muffler for motor.

Background technique

At present current petrol engine baffler comprises housing 1, preceding dividing plate 2, rear bulkhead 3, ante-chamber 4, intermediate cavity 5, back cavity 6, suction tude 7, vent 8, breathing pipe 9, U-shaped steam outlet pipe 10 as shown in Figure 1.The waste gas that motor is discharged and the noise of generation at first enter intermediate cavity 5 by suction tude 7, enter ante-chamber 4 by intermediate cavity 5 through vent 8, enter back cavity 6 by ante-chamber 4 through breathing pipe 9, are discharged by U-shaped steam outlet pipe 10 at last.Mainly utilize three expansions suddenly in pipeline ventilation cross section, increase the flow process distance and the sound wave direction of repeatedly turning back, slow down air-flow, can reach the effect of certain reduction noise.But exist materials many, complex structure, manufacturing process is many, the cost height, the noise elimination effect is relatively poor, and air-flow is repeatedly turned back and is caused the defective of back pressure considerable influence power.

The model utility content

The technical problems to be solved in the utility model provides a kind of simple in structure, and is with low cost, and the noise elimination effect is pipe type micropore arc muffler for motor preferably.

In order to solve the problems of the technologies described above, a kind of pipe type micropore of the utility model arc muffler for motor: include ante-chamber, back cavity, dividing plate is through the suction tude of bend pipe flange connection, steam outlet pipe, be several breathing pipes on the dividing plate, the tube wall gas turnover part of above-mentioned pipeline is the distribution micropore evenly, can carry out four decay to waste gas and the noise that motor is discharged, air-flow is compressed suddenly and is divided into many threads, after expand suddenly again, so repeatedly sudden change, noise is by big high attenuation.Its erasure effect is better than prior art after tested, also exist consume material less, advantage simple in structure, that operation is few has reduced cost of production, and in the process of noise-decreasing, do not change for the direction of air-flow except that bend pipe, resistance is less, and back pressure does not have obvious enhancing, less to the engine power influence, reduced oil consumption.

Further, silencing apparatus and motor is connected for the bend pipe flange.Bend pipe can play and slow down the effect that air-flow reduces noise, compared to existing technology for several times 180 degree to the turning back of air-flow, the back pressure of formation is less.

Further, the housing bottom surface is curved outwards outstanding, and the contrast prior art has formed than large space with less material, and the increase of intracavity space can make the reactive muffling effect strengthen.

The beneficial effects of the utility model are: with low cost, manufacturing process is less, and technology is simple, and erasure effect is better, and does not influence power.

Description of drawings

Below in conjunction with drawings and Examples technical solutions of the utility model are further specified

Acoustic wave filter structure schematic representation in Fig. 1 prior art

Among Fig. 1:

1. dividing plate 3. rear bulkheads before the housing 2.

4. ante-chamber 5. lumens 6. back cavities

7. suction tude 8. vents 9. breathing pipes

10.U shape steam outlet pipe

Fig. 2 is the utility model structural representation

Among Fig. 2:

11. housing 12. arc-shaped partitions 13. ante-chambers

14. back cavity 15. flange bridge pieces 16. suction tude

17. breathing pipe 18. steam outlet pipes

Embodiment

As shown in Figure 2, a kind of pipe type micropore of the utility model arc muffler for motor comprises the cylindrical shell 11 of the outwards curved outstanding sealing in bottom surface being connected with arc-shaped partition 12 in these housing 11 inner chambers, and inner chamber is divided into ante-chamber 13 and back cavity 14; Suction tude 16 is passed and is fixed in this housing 11 and extend into housing ante-chamber 13, and the part of suction tude 16 outside housing 11 is connected 15 with the bend pipe flange of motor combustion gas and joins; Five breathing pipes 17 pass and are fixed on the arc-shaped partition, are communicated with ante-chamber 13 and back cavity 14, and steam outlet pipe 18 passes and is fixed in this housing 11 and extend into housing back cavity 14; Suction tude 16 ante-chamber portions, breathing pipe 17 ante-chamber portions and back cavity portion, steam outlet pipe 18 its sealed port of butt end of back cavity portion, a plurality of micropores that evenly distribute on the tube wall, the internal diameter of micropore is 2 millimeters.

During use, air-flow at first is connected the resistance decay that 15 places once change the sound wave direction at the bend pipe flange with sound wave, then enter ante-chamber by the micropore hole decay on the suction tude 16, micropore on breathing pipe 17 enters back cavity 14 by ante-chamber 13, and carry out the hole decay second time, discharge by the micropore on the steam outlet pipe 18 at last, and carry out hole decay for the third time.Sound wave is carried out four decay altogether, excellent noise reduction effect, and power is not produced eutralizing operation, simple in structure, with low cost.

The utility model is by repeated detection, reached 15/20 decibel of the technical grade standard of noise reduction controller.On same gasoline engine generator group,, be the 76-78 decibel through the test sound-deadening and noise-reducing, and the utility model sound-deadening and noise-reducing is the 73-75 decibel with baffler shown in Figure 1.

Measuring tool:

1. noise on-spot tester: 30/130 decibel on AR824 type

2. temperature transducer: WZPK-103L=300mm Pt100

3. DIGITAL TEMPERATURE DEMONSTRATOR: 0-600 ℃ of XMZ-102 Pt100

4. intelligent pressure transmitter: HYT-3151GP5E22M4B3Fa 0 ~ 100KPa

5. intelligent pressure display instrument: XMZ-104 0-100KPa

6. digimer: DP9501

Above-described only is preferred implementation of the present utility model; should be understood that; for a person skilled in the art; under the prerequisite that does not break away from the utility model structure; can also make some distortion and improvement; these also should be considered as protection domain of the present utility model, and these can not influence effect and practical applicability that the utility model is implemented.

Claims (6)

1. pipe type micropore arc muffler for motor, it comprises housing (11), be connected with dividing plate (12) in this housing (11) inner chamber, inner chamber is divided into ante-chamber (13) and back cavity (14), suction tude (16) is passed and is fixed in this housing (11) and extend into housing ante-chamber (13), the part of suction tude (16) outside housing joined with engine exhaust pipe, several breathing pipes (17) pass and are fixed in dividing plate (12), be communicated with ante-chamber (13) and back cavity (14), steam outlet pipe (18) passes and is fixed in this housing (11) and extend into housing back cavity (14), it is characterized in that: suction tude (16) is positioned at the part of ante-chamber, breathing pipe (17) and steam outlet pipe (18) are positioned at a plurality of micropores that evenly distribute on the tube wall of part of back cavity.

2. pipe type micropore arc muffler for motor according to claim 1 is characterized in that: suction tude (16) adopts the bend pipe flange to be connected with the joint of engine exhaust pipe.

3. pipe type micropore arc muffler for motor according to claim 1 is characterized in that: housing (11) bottom surface is curved outwards outstanding.

4. pipe type micropore arc muffler for motor according to claim 1, it is characterized in that: dividing plate (12) is curved protruding in ante-chamber.

5. pipe type micropore arc muffler for motor according to claim 1 is characterized in that: on the arc-shaped partition (12) the quantity of affixed breathing pipe (17) be 5.

6. pipe type micropore arc muffler for motor according to claim 1, it is characterized in that: the internal diameter of micropore is 2 millimeters.

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