CN2471934Y

CN2471934Y - Silencer

Info

Publication number: CN2471934Y
Application number: CN 01237218
Authority: CN
Inventors: 邹启平
Original assignee: Individual
Current assignee: Individual
Priority date: 2001-04-06
Filing date: 2001-04-06
Publication date: 2002-01-16
Anticipated expiration: 2011-04-06

Abstract

The utility model discloses a muffler for vehicle diesel engine, comprising a housing (1), a mesh pipe (2), a partition (3), a clapboard (4), a perforation plate (5) and an exhausting interface (6). The tubbish housing is divided into three cavities by the perforation plate and the clapboard. Small holes are arranged in the mesh pipe (2) wall and the perforation plate (5). The clapboard (4) is positioned on the left of the perforation plate (5). An air inlet is positioned at one end of the mesh pipe (2). The mesh pipe (2) passes by the left cavity and passes through the clapboard (4). The other side of the mesh pipe and the perforation plate (5) is in fixed and closing state. The mesh pipe (2) is separated into the left and right cavities by the partition (3) and the left and right cavities are not communicated.

Description

A kind of silencing apparatus

The utility model relates to a kind of silencing apparatus of diesel engine for automobile.

The key technical indexes of silencing apparatus is for inserting loss and power loss ratio, at present, it is three chambeies, two perforated plate structures that the compact car use for diesel engine gets more a kind of silencing apparatus, it is isolated into three chambers with perforated plate and dividing plate in being the shell of tubbiness, be a left side, in, right chamber, the left side is a suction port, the right side is a relief opening, the sealing of mesh tube one end is fixed on the perforated plate on the left side, the other end reaches right chamber through dividing plate, is equipped with aperture on perforated plate and the mesh tube, and air inlet is by the aperture of left chamber from perforated plate, middle chamber enters mesh tube, discharge through right chamber and relief opening then, thereby reach the effect that reduces noise.But owing to insert about loss 18dB (A), by up-to-date car gage regulation, the compact car diesel engine silencer inserts loss 〉=20dB (A), so this silencing apparatus technical order has not met up-to-date car gage requirement.

The utility model purpose of design is to provide boundary dimension and the installation dimension that does not change former silencing apparatus, by the redesign to internal structure, inserts loss to increase, thereby improves a kind of silencing apparatus of noise elimination effect.

For achieving the above object, the utility model is mainly by shell, mesh tube, spoiler, dividing plate, perforated plate, exhaust port is formed, be in the shell of tubbiness and be isolated into three chambers with perforated plate and dividing plate, be a left side, in, right chamber, the left side is a suction port, the right side is a relief opening, the tube wall and the perforated plate of mesh tube are provided with aperture, dividing plate is in the left side of perforated plate, mesh tube one end is a suction port, and mesh tube is through left chamber and pass dividing plate, and the other end and perforated plate are fixedly closed state, be provided with spoiler in the mesh tube and form a left side, right tube chamber chamber, a left side, right tube chamber chamber is the state that does not communicate.

Aperture on the mesh tube tube wall is an air outlet hole in the A district, and the D district is an inlet hole, and the E district is an air outlet hole.Mesh tube in the A district, the punching rate difference of D district, E district aperture.Mesh tube and exhaust port are eccentric the symmetrical distribution.

After adopting technique scheme, muffler design becomes three chambeies, four perforated plate structures, and each cavity length difference, and each perforated plate punching rate difference increases acoustically effective and sound absorption frequency range thereby reach.

Below in conjunction with accompanying drawing the utility model is elaborated.

Fig. 1 is the structural drawing of a kind of silencing apparatus of the utility model.

Fig. 2 is a kind of acoustic wave filter structure figure.

Below in conjunction with the drawings and specific embodiments the utility model is done detailed explanation.

According to shown in Figure 2, a kind of automobile silencing apparatus of prior art, it is isolated into three chambers with perforated plate and dividing plate in the cross section is round tubbiness shell, be the left, center, right chamber, and the left side is for advancing aperture, the right side is row's aperture, the sealing of mesh tube one end is fixed on the perforated plate on the left side, and the other end reaches right chamber through dividing plate, is equipped with aperture on perforated plate and the mesh tube, air inlet enters mesh tube by left chamber from aperture, the middle chamber of perforated plate, discharges through right chamber and relief opening then.

According to shown in Figure 1, a kind of silencing apparatus of the utility model, mainly by shell 1, mesh tube 2, spoiler 3, dividing plate 4, perforated plate 5, exhaust port 6 is formed, be in the shell of tubbiness and be isolated into three chambers with perforated plate and dividing plate, be a left side, in, right chamber, the left side is a suction port, the right side is a relief opening, the tube wall of mesh tube 2 and perforated plate 5 are provided with aperture, it is characterized in that the left side of dividing plate 4 at perforated plate 5, and mesh tube 2 one ends are suction port, mesh tube 2 is through left chamber and pass dividing plate 4, the other end and perforated plate 5 are fixedly closed state, are provided with spoiler 3 in the mesh tube 2 and form a left side, right tube chamber chamber, a left side, right tube chamber chamber is the state that does not communicate.

The gas that diesel engine is discharged enters mesh tube 2 by suction port, because spoiler 3 stops that air-flow enters the B district by the A district of mesh tube 2 by the aperture on the tube wall.And enter mesh tube 2 to D district through the aperture of C district mesh tube 2, and entering into intermediate cavity through the aperture of E district mesh tube 2 then is the F district, the aperture that passes through perforated plate 5 then enters the G district after the relief opening discharge.Air-flow in the A district, B district to C district, D district be to the flow process in E district, reduce acoustic energy by the formed one by one little resonant cavity of the aperture on mesh tube 2 tube walls, the air communication A district that associates enters the B district, enter the D district from the C district, enter the F district, enter the G district from the F district from the E district, enter relief opening from the G district, passed through the multiple contraction and the process of expansion of contraction → expansion → contraction → expansion → contraction, reduced acoustic energy, reduced acoustic energy by perforated plate on mesh tube 2 tube walls and perforated plate 5.Simultaneously by the chamber of different sizes and the acoustic energy of different perforated plates reduction different frequency sections.

Claims

1, a kind of silencing apparatus is mainly by shell (1), mesh tube (2), spoiler (3), dividing plate (4), perforated plate (5), exhaust port (6) is formed, be in the shell of tubbiness and be isolated into three chambers with perforated plate and dividing plate, be a left side, in, right chamber, the left side is a suction port, the right side is a relief opening, the tube wall of mesh tube (2) and perforated plate (5) are provided with aperture, it is characterized in that the left side of dividing plate (4) in perforated plate (5), mesh tube (2) one ends are suction port, mesh tube (2) is through left chamber and pass dividing plate (4), the other end and perforated plate (5) are fixedly closed state, be provided with spoiler (3) in the mesh tube (2) and form a left side, right tube chamber chamber, a left side, right tube chamber chamber is the state that does not communicate.

2, a kind of silencing apparatus according to claim 1 is characterized in that the aperture on mesh tube (2) tube wall is air outlet hole in the A district, and the D district is an inlet hole, and the E district is an air outlet hole.

3, a kind of silencing apparatus according to claim 1, it is characterized in that mesh tube (2) in the A district, the punching rate difference of D district, E district aperture.

4, a kind of silencing apparatus according to claim 1 is characterized in that mesh tube (2) and exhaust port (6) are symmetrically distributed for eccentric.