CN201756992U

CN201756992U - Silencer for general-purpose engines

Info

Publication number: CN201756992U
Application number: CN2010202885100U
Authority: CN
Inventors: 文德政
Original assignee: DAZU COUNTY HONGRUN GENERAL MACHINERY PARTS FACTORY
Current assignee: DAZU COUNTY HONGRUN GENERAL MACHINERY PARTS FACTORY
Priority date: 2010-08-11
Filing date: 2010-08-11
Publication date: 2011-03-09
Anticipated expiration: 2020-08-11

Abstract

The utility model discloses a silencer for general-purpose engines, which comprises a casing (1) and an air inlet pipe (2). The inside of the casing (1) is divided into a cavity (I), a cavity (II) and a cavity (III) by a first partition (3) and a second partition (4), each two adjacent cavities are communicated with each other via orifices disposed on the corresponding partition, a mounting seat (5) is arranged at the lower end of the air inlet pipe (2), the upper end of the air inlet pipe (2) penetrates through the bottom of the casing (1) to extend into the first cavity (I), air inlet holes (2a) are disposed on the wall of the air inlet pipe (2) positioned on the first cavity (I), and an air outlet (6) is arranged on the wall of the casing (1) corresponding to the third cavity (III). The silencer is reasonable in design, simple in structure, easy to assemble and low in cost, can reduce noise level to about 75dB, and not only effectively increases powers of the general-purpose engines, but also can guarantee idling performances of the general-purpose engines.

Description

Logical machine silencing apparatus

Technical field

The utility model belongs to the silencing apparatus technical field, specifically, and the silencing apparatus that uses on the particularly logical machine.

Background technique

Silencing apparatus is the vitals on the logical machine, plays the noise reduction noise reduction.At present, acoustic wave filter structure complexity, the assembling of using on the logical machine is difficult, cost is higher, and the level of noise behind the silencing apparatus noise reduction still has 80dB, not only can reduce the power of logical machine, and can influence the idling performance of logical machine.

Summary of the invention

The logical machine silencing apparatus that provides a kind of noise reduction good is provided technical problem to be solved in the utility model.

The technical solution of the utility model is as follows: a kind of logical machine silencing apparatus, comprise housing and suction tude, its key is: the inside of described housing is separated into three chambers by first, second dividing plate, and communicate by the aperture of offering on the dividing plate between the two adjacent chambers, the lower end of described suction tude is provided with fitting seat, the bottom that housing is passed in the upper end of suction tude extend in first chamber, and suction tude is positioned on the tube wall of first chamber and has inlet hole, and the wall of corresponding the 3rd chamber of described housing is provided with the air outlet.

The utility model is fixed on the logical machine by fitting seat, the waste gas that logical machine acting produces enters first chamber of housing through suction tude, enter second chamber and the 3rd chamber respectively by the aperture on first dividing plate then, the aperture of the air-flow of second chamber on second partition enters the 3rd chamber, discharged by the air outlet at last.Because air-flow constantly changes flow direction and flowing velocity in housing, the energy of air-flow is constantly absorbed, and noise reduces greatly.

For simplified structure, make things convenient for processing and fabricating, described second partition is vertically welded on first dividing plate, form "T"-shaped structure, on the plate face of corresponding second chamber of first dividing plate, be distributed with first aperture, be distributed with second aperture on the plate face of corresponding the 3rd chamber of first dividing plate, be distributed with the 3rd aperture on the plate face of described second partition.

In order to delay the flowing velocity of air-flow, reach better noise reduction, the volume of described first chamber is the twice of second cavity volume, the volume of second chamber equates with the volume of the 3rd chamber.

The gross area of described first aperture equates substantially with the gross area of the 3rd aperture, but the gross area greater than second aperture, air-flow major part in such first chamber flows to second chamber, and all the other fractions flow to the 3rd chamber, also can play the effect that improves noise reduction.

Described housing is made of upper and lower cover, and upper and lower cover is the uncovered box structure of the end sealing the other end, is provided with horizontal flange at the open-mouth end of upper and lower cover, and the open-mouth end of described loam cake and the open-mouth end of lower cover connect fixing.More than simple and reliable for structure, processing and the assembling all be easy to.

As preferably, offer semicircle breach in the relative position symmetry of described upper and lower cover open-mouth end, two semicircle breach connect, and form the air outlet, in this air outlet filter screen are housed.

As preferably, the last end closure of described suction tude, weld mutually with oval fitting seat the lower end, has two pilot holes on fitting seat.

Beneficial effect: the utility model is reasonable in design, simple in structure, assembling easily, cost is low, level of noise can be reduced to about 75dB, not as good as effectively having improved the power of logical machine, and can guarantee the idling performance of logical machine.

Description of drawings

Fig. 1 is a structural representation of the present utility model.

Fig. 2 removes plan view behind the loam cake for Fig. 1.

Fig. 3 is the right elevation of Fig. 1.

Fig. 4 is the structural representation of first, second dividing plate in the utility model.

Embodiment

The utility model is described in further detail below in conjunction with drawings and Examples:

As Fig. 1, Fig. 2, shown in Figure 3, the utility model is made of housing 1, suction tude 2, first dividing plate 3, second partition 4 and fitting seat 5, its middle shell 1 has upper and lower cover 1a, 1b, upper and lower cover 1a, 1b are the uncovered box structure of the end sealing the other end, open-mouth end at upper and lower cover 1a, 1b is formed with horizontal flange, the open-mouth end of the open-mouth end of described loam cake 1a and lower cover 1b connects fixing, and the horizontal flange of loam cake 1a is pressed on the horizontal flange of lower cover 1b, forms closed shell 1.Relative position symmetry at described upper and lower cover 1a, 1b open-mouth end offers semicircle breach, and two semicircle breach connect, and forms air outlet 6, in this air outlet 6 filter screen is housed.

From Fig. 1, Fig. 2, Fig. 3 and Fig. 4 as can be known, at housing 1 internal fixation first dividing plate 3 and second partition 4 are installed, and second partition 4 is vertically welded on first dividing plate 3, forms "T"-shaped structure, and first, second dividing plate 3,4 inside with housing 1 are separated into three chamber I, II, III.The volume of the described first chamber I is the twice of the second chamber II volume, and the volume of the second chamber II equates with the volume of the 3rd chamber III.Communicate by first aperture 7 being distributed with on the plate face of described first dividing plate, the 3 corresponding second chamber II between several first aperture, 7, the first chamber I and the second chamber II.Communicate by second aperture 8 being distributed with on the plate face of corresponding the 3rd chamber III of first dividing plate 3 between a plurality of second aperture, 8, the first chamber I and the 3rd chamber III.Communicate by the 3rd aperture 9 being distributed with on the plate face of second partition 4 between several the 3rd aperture 9, the second chamber II and the 3rd chamber III.The gross area of described first aperture 7 equates substantially with the gross area of the 3rd aperture 9, but greater than the gross area of second aperture 8.

Also as can be known, weld mutually with oval fitting seat 5 lower end of suction tude 2, has two pilot hole 5a on fitting seat 5 from Fig. 1, Fig. 2, and these two pilot hole 5a separations are in the both sides of suction tude 2 lower ends.The last end closure of described suction tude 2, the bottom that lower cover 1b is passed in the upper end of suction tude 2 extend in the first chamber I, and suction tude 2 is positioned on the tube wall of the first chamber I and has a plurality of inlet hole 2a, described air outlet 6 is positioned on the 3rd chamber III corresponding shell wall, and the 3rd chamber III communicates with the external world by air outlet 6.

Working principle of the present utility model is as follows:

The waste gas that logical machine acting produces is through suction tude 2, enter the first chamber I of housing 1 by the inlet hole 2a on suction tude 2 tube walls, first aperture 7 that most of air communication is crossed on first dividing plate 3 enters the second chamber II, second aperture 8 that all the other fraction air communication are crossed on first dividing plate 3 enters the 3rd chamber III, three aperture 9 of air-flow on second partition 4 in the second chamber II flows to the 3rd chamber III, and the air-flow of the 3rd chamber III is discharged by air outlet 6 at last.Because air-flow constantly changes flow direction and flowing velocity in housing, the energy of air-flow is constantly absorbed, and can reduce pneumatic noise greatly.

Claims

1. logical machine silencing apparatus, comprise housing (1) and suction tude (2), it is characterized in that: the inside of described housing (1) is by first, second partition (3,4) be separated into three chamber (I, II, III), and communicate by the aperture of offering on the dividing plate between the two adjacent chambers, the lower end of described suction tude (2) is provided with fitting seat (5), the bottom that housing (1) is passed in the upper end of suction tude (2) extend in first chamber (I), and suction tude (2) is positioned on the tube wall of first chamber (I) and has inlet hole (2a), and the wall of corresponding the 3rd chamber of described housing (1) (III) is provided with air outlet (6).

2. logical machine silencing apparatus according to claim 1, it is characterized in that: described second partition (4) is vertically welded on first dividing plate (3), form "T"-shaped structure, on the plate face of corresponding second chamber of first dividing plate (3) (II), be distributed with first aperture (7), be distributed with second aperture (8) on the plate face of corresponding the 3rd chamber of first dividing plate (3) (III), be distributed with the 3rd aperture (9) on the plate face of described second partition (4).

3. logical machine silencing apparatus according to claim 2 is characterized in that: the volume of described first chamber (I) is the twice of second chamber (II) volume, and the volume of second chamber (II) equates with the volume of the 3rd chamber (III).

4. according to claim 2 or 3 described logical machine silencing apparatuss, it is characterized in that: the gross area of described first aperture (7) equates substantially with the gross area of the 3rd aperture (9), but greater than the gross area of second aperture (8).

5. logical machine silencing apparatus according to claim 1, it is characterized in that: described housing (1) is made of upper and lower cover (1a, 1b), upper and lower cover (1a, 1b) is the uncovered box structure of the end sealing the other end, open-mouth end at upper and lower cover (1a, 1b) is provided with horizontal flange, and the open-mouth end of the open-mouth end of described loam cake (1a) and lower cover (1b) connects fixing.

6. logical machine silencing apparatus according to claim 5, it is characterized in that: the relative position symmetry at described upper and lower cover (1a, 1b) open-mouth end offers semicircle breach, two semicircle breach connect, and form air outlet (6), and filter screen is equipped with in (6) in this air outlet.

7. logical machine silencing apparatus according to claim 1 is characterized in that: the last end closure of described suction tude (2), weld mutually with oval fitting seat (5) lower end, has two pilot holes (5a) on fitting seat (5).