CN203189078U - Muffler for engineering machine - Google Patents

Muffler for engineering machine Download PDF

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Publication number
CN203189078U
CN203189078U CN 201320147108 CN201320147108U CN203189078U CN 203189078 U CN203189078 U CN 203189078U CN 201320147108 CN201320147108 CN 201320147108 CN 201320147108 U CN201320147108 U CN 201320147108U CN 203189078 U CN203189078 U CN 203189078U
Authority
CN
China
Prior art keywords
cover
dividing plate
diffusion tube
frequency noise
tube
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN 201320147108
Other languages
Chinese (zh)
Inventor
岳广江
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZHUCHENG HAIDEWEI MACHINE CO Ltd
Original Assignee
ZHUCHENG HAIDEWEI MACHINE CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZHUCHENG HAIDEWEI MACHINE CO Ltd filed Critical ZHUCHENG HAIDEWEI MACHINE CO Ltd
Priority to CN 201320147108 priority Critical patent/CN203189078U/en
Application granted granted Critical
Publication of CN203189078U publication Critical patent/CN203189078U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model provides a muffler for an engineering machine. The muffler for the engineering machine comprises a casing, an air intake diffusion tube, a middle tube and an air discharging diffusion tube. A front end cover and a back end cover snap at two ends of the casing respectively, a first partition plate and a second partition plate are arranged in the casing, and a plurality of through holes are arranged on the air intake diffusion tube, the middle tube, the air discharging diffusion tube and the first partition plate. An opening is arranged at one end of the air intake diffusion tube and one end of the air discharging diffusion tube respectively, the other end of the air intake diffusion tube and the other end of the air discharging diffusion tube are closed by plugs, and sound absorbing materials are respectively filled between the second partition plate and a first screen plate and between a second screen plate and the back end cover. The muffler for the engineering machine maintains the advantage that a reactive exhaust muffler has good muffling effect on lower-medium frequency noise, air flows sheer off and pass through through holes for multiple times to eliminate high-frequency noise, and whistling of an engine supercharger can be eliminated well. In addition, the holes on the first partition plate enable the length and the volume of a first cavity to be increased, and low-frequency noise can be eliminated well.

Description

A kind of engineering machinery silencing apparatus
Technical field
The utility model belongs to the silencing apparatus technical field, is specifically related to the silencing apparatus that is used for eliminating engine exhaust fundamental frequency noise and high-frequency noise that a kind of engineering machinery is used.
Background technique
At present, existing engine exhaust muffler mainly adopts the resistance exhaust silencer structure of pipeline section expansion and cross-sectional constriction, utilize sound wave in abrupt change of cross-section place because the variation of acoustic reactance, some sound wave reflects back to sound source, and the not outlet by silencing apparatus, thereby reach the purpose of noise elimination.This resistance exhaust silencer centering, the noise elimination of low-frequency noise have certain effect, and for high frequency noise, since adopt to high frequency noise eliminate the noise effective perforation pipeline section and the negligible amounts of perforated plate, and the inner not layout resistive sound-absorbing material good to the high frequency noise acoustically effective, it is undesirable to the noise elimination effect of high frequency noise, and because the restriction of size, expansion chamber can not well be eliminated exhaust fundamental frequency noise.
Summary of the invention
Thereby the purpose of this utility model is to provide a kind of and utilizes the perforation dividing plate can not cut apart chamber fully to eliminate the noise effective to low frequency and take full advantage of the impedance composite exhaust silencer that perforated pipe and sound-absorbing material are controlled high-frequency noise.
The technological scheme that its technical problem that solves the utility model adopts is: a kind of engineering machinery silencing apparatus, comprise housing, the air inlet diffusing tube, intervalve, the diffusing tube of giving vent to anger, the two ends of described housing are occluding with front cover and rear end cover respectively, be provided with dividing plate one and dividing plate two in the housing, dividing plate one is provided with a plurality of vents, between described front cover and the dividing plate one at the air inlet diffusing tube that is provided with perpendicular to the housing axial direction with a plurality of vents, one end of air inlet diffusing tube is provided with opening, the other end is sealed by plug, be provided with web plate one and web plate two between dividing plate two and the rear end cover, between web plate one and the web plate two at the diffusing tube of giving vent to anger that is provided with perpendicular to the housing axial direction with a plurality of vents, the end of diffusing tube of giving vent to anger is provided with opening, the other end is sealed by plug, the second cavity inherence between dividing plate one and the dividing plate two is parallel to the housing axial direction and is provided with intervalve with a plurality of vents, one end of intervalve is arranged in first cavity that front cover and dividing plate one are separated into, the other end of intervalve is positioned at dividing plate two and the 3rd cavity that rear end cover is separated into, and is filled with sound absorbing material respectively between dividing plate two and the web plate one and between web plate two and the rear end cover.
Further, described intervalve has 5.
The utlity model has following beneficial effect: the utility model has kept resistance exhaust silencer centering, the effective advantage of low frequency noise noise elimination, and air-flow by repeatedly turn to and repeatedly vent to the noise elimination of high frequency, the engine supercharger whistle is well eliminated, increase length and the volume of first cavity simultaneously by the hole on the dividing plate one, low-frequency noise is well solved.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is that the utility model A-A is to sectional view.
Fig. 3 is the left view among the utility model Fig. 1.
Among the figure, 1, rear end cover, 2, web plate two, 3, the diffusing tube of giving vent to anger, 4, housing, 5, dividing plate two, 6, intervalve, 7, plug, 8, front cover, 9, the air inlet diffusing tube, 10, first cavity, 11, second cavity, 12, sound absorbing material, the 13, the 3rd cavity, 14, dividing plate one, 15, web plate one.
Embodiment
Below in conjunction with accompanying drawing the utility model is elaborated
As Fig. 1,2, shown in 3, a kind of engineering machinery silencing apparatus, comprise housing 4, air inlet diffusing tube 9, intervalve 6, the diffusing tube 3 of giving vent to anger, the two ends of described housing 4 are occluding with front cover 8 and rear end cover 1 respectively, be provided with dividing plate 1 and dividing plate 25 in the housing 4, dividing plate 1 is provided with a plurality of vents, between described front cover 8 and the dividing plate 1 at the air inlet diffusing tube 9 that is provided with perpendicular to housing 4 axial directions with a plurality of vents, one end of air inlet diffusing tube 9 is provided with opening, the other end is sealed by plug 7, be provided with web plate 1 and web plate 22 between dividing plate 25 and the rear end cover 1, between web plate 1 and the web plate 22 at the diffusing tube 3 of giving vent to anger that is provided with perpendicular to housing 4 axial directions with a plurality of vents, the end of diffusing tube 3 of giving vent to anger is provided with opening, the other end is sealed by plug 7, second cavity, 11 inherences between dividing plate 1 and the dividing plate 25 are parallel to housing 4 axial directions and are provided with intervalve 6 with a plurality of vents, one end of intervalve 6 is arranged in first cavity 10 that front cover 8 and dividing plate 1 are separated into, the other end of intervalve 6 is positioned at dividing plate 25 and the 3rd cavity 13 that rear end cover 1 is separated into, and is filled with sound absorbing material 12 respectively between dividing plate 25 and the web plate 1 and between web plate 22 and the rear end cover 1.
Further, described intervalve 6 has 5.
The noise that enters silencing apparatus from engine exhaust pipe enters air inlet diffusing tube 9, iris action through plug 7, by the vent on the suction tude, enter first cavity 10, the expansion of realization one-level, eliminate the basic, normal, high audio-frequency noise of part, the part high-frequency noise is eliminated in the transformation of noise direction simultaneously and in the vibration friction of little vent.Noise is when entering second cavity 11 from first cavity 10 by the vent on the vent on the intervalve 6 and the dividing plate 1, the expansion of the realization second level, the elimination part is low, in, high-frequency noise, simultaneously because the vibration friction of the vent of noise on intervalve 6, eliminate the part high-frequency noise, noise from second cavity 11 when intervalve 6 enters the 3rd cavity 13, realize three grades of expansions, the elimination part is low, in, high-frequency noise, simultaneously because the transformation of noise direction and the vibration friction of the little vent on intervalve 6, eliminate the part high-frequency noise, sound absorbing material 12 in the 3rd cavity 13 realizes eliminating the part high-frequency noise, when noise is discharged silencing apparatuss through the diffusing tube 3 of giving vent to anger, because the part high-frequency noise is eliminated in turning to and the friction of little vent of noise again.
The utility model has kept resistance exhaust silencer centering, the effective advantage of low frequency noise noise elimination, and air-flow by repeatedly turn to and repeatedly vent to the noise elimination of high frequency, the engine supercharger high-frequency noise is well eliminated, strengthened length and the volume of first cavity and make low-frequency noise obtain good solution by increasing the hole on the dividing plate one simultaneously.
The utility model is not limited to above-mentioned mode of execution, and anyone should learn the structural change of making under enlightenment of the present utility model, every with the utlity model has identical or close technological scheme, all fall within the protection domain of the present utility model.
The technology that the utility model is not described in detail, shape, structure partly are known technology.

Claims (2)

1. engineering machinery silencing apparatus, comprise housing (4), air inlet diffusing tube (9), intervalve (6), the diffusing tube (3) of giving vent to anger, it is characterized in that, the two ends of described housing (4) are occluding with front cover (8) and rear end cover (1) respectively, be provided with dividing plate one (14) and dividing plate two (5) in the housing (4), dividing plate one (14) is provided with a plurality of vents, between described front cover (8) and the dividing plate one (14) at the air inlet diffusing tube (9) that is provided with perpendicular to housing (4) axial direction with a plurality of vents, one end of air inlet diffusing tube (9) is provided with opening, the other end is sealed by plug (7), be provided with web plate one (15) and web plate two (2) between dividing plate two (5) and the rear end cover (1), between web plate one (15) and the web plate two (2) at the diffusing tube of giving vent to anger (3) that is provided with perpendicular to housing (4) axial direction with a plurality of vents, the end of diffusing tube (3) of giving vent to anger is provided with opening, the other end is sealed by plug (7), second cavity (11) inherence between dividing plate one (14) and the dividing plate two (5) is parallel to housing (4) axial direction and is provided with intervalve (6) with a plurality of vents, one end of intervalve (6) is arranged in first cavity (10) that front cover (8) and dividing plate one (14) are separated into, the other end of intervalve (6) is positioned at dividing plate two (5) and the 3rd cavity (13) that rear end cover (1) is separated into, and is filled with sound absorbing material (12) respectively between dividing plate two (5) and the web plate one (15) and between web plate two (2) and the rear end cover (1).
2. a kind of engineering machinery silencing apparatus according to claim 1 is characterized in that, described intervalve (6) has 5.
CN 201320147108 2013-03-28 2013-03-28 Muffler for engineering machine Expired - Fee Related CN203189078U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201320147108 CN203189078U (en) 2013-03-28 2013-03-28 Muffler for engineering machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201320147108 CN203189078U (en) 2013-03-28 2013-03-28 Muffler for engineering machine

Publications (1)

Publication Number Publication Date
CN203189078U true CN203189078U (en) 2013-09-11

Family

ID=49105944

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201320147108 Expired - Fee Related CN203189078U (en) 2013-03-28 2013-03-28 Muffler for engineering machine

Country Status (1)

Country Link
CN (1) CN203189078U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103696828A (en) * 2014-01-04 2014-04-02 诸城市海得威机械有限公司 High-frequency noise eliminating silencer for engineering vehicle

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103696828A (en) * 2014-01-04 2014-04-02 诸城市海得威机械有限公司 High-frequency noise eliminating silencer for engineering vehicle

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130911

Termination date: 20140328

C17 Cessation of patent right