CN214366288U

CN214366288U - Engineering machine tool silencer

Info

Publication number: CN214366288U
Application number: CN202120556807.9U
Authority: CN
Inventors: 李岩
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-03-16
Filing date: 2021-03-16
Publication date: 2021-10-08
Anticipated expiration: 2031-03-16

Abstract

The utility model discloses an engineering machinery muffler, which comprises a shell, wherein an air inlet pipe is fixedly connected to the inner wall of the left side end of the shell, an air outlet pipe is fixedly connected to the inner wall of the right side end of the shell, a ventilating cylinder is fixedly connected to the right side end of the air inlet pipe, a sound absorbing cylinder is arranged at the outer side end of the ventilating cylinder in a sleeving manner, an annular plate is fixedly connected to the right side end of the ventilating cylinder, an air outlet is arranged on the annular plate in an annular array manner, a silencing baffle is arranged at the right side end of the air outlet, the left side end of the silencing baffle is fixedly connected with the right side end wall of the annular plate, and a stop block is fixedly connected to the inner side end of the silencing baffle. The noise generated during the exhaust emission is effectively reduced.

Description

Engineering machine tool silencer

Technical Field

The utility model relates to an engineering machine tool equipment technical field specifically is an engineering machine tool silencer.

Background

The silencer is a device which allows airflow to pass through and can prevent and reduce sound transmission, and is an important measure for eliminating aerodynamic noise. The muffler can block the propagation of sound waves and allow air flow to pass through, and is an effective tool for controlling noise. Mufflers are of many types and can be divided into six main types according to the muffling mechanism: resistive muffler, reactive muffler, impedance composite muffler, micro-perforated plate muffler, small hole muffler and active muffler.

In engineering machinery, the main noise source is mainly generated by the vibration of the engine during working and the impact of tail gas and an exhaust pipe in the exhaust process, most of the existing mufflers for the tail gas emission of the engineering machinery utilize a vacuum layer and a muffling cotton matched mode to perform muffling, but the muffling mode only performs muffling in the noise propagation process, so that the mufflers are expensive in manufacturing cost and poor in muffling effect, and have defects in use.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an engineering machine tool silencer to solve the problem that proposes among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

the utility model provides an engineering machinery silencer, includes the casing, casing left side end inner wall fixedly connected with intake pipe, casing right side end inner wall fixedly connected with outlet duct, the ventilative section of thick bamboo of intake pipe right side end fixedly connected with, ventilative section of thick bamboo outside end is equipped with a sound absorption section of thick bamboo through the mode that cup joints, ventilative section of thick bamboo right side end fixedly connected with annular slab, and the mode through annular array is equipped with the gas outlet on the annular slab, and gas outlet right side end is equipped with the amortization baffle, amortization baffle left side end and annular slab right side end wall fixed connection, amortization baffle inboard end fixedly connected with dog.

As a further aspect of the present invention: and the end wall of the inner side of the shell is fixedly provided with a sound-absorbing plate, and a vacuum layer is arranged between the shell and the sound-absorbing plate.

As a further aspect of the present invention: inhale sound bobbin outside end wall center fixedly connected with shock attenuation gasbag, the shock attenuation gasbag other end and acoustical panel inner wall fixed connection, shock attenuation gasbag both sides end fixedly connected with damping device, damping device includes the sleeve, sleeve bottom and acoustical panel inner wall fixed connection, the sleeve other end is fixed with the slide bar through the mode that cup joints, telescopic one end is kept away from to the slide bar and is inhaled sound bobbin outside end wall fixed connection, the slide bar sets up at telescopic one end fixedly connected with limiting plate, the mode through the butt between limiting plate bottom outer wall and the sleeve bottom inner wall is fixed with the spring.

As a further aspect of the present invention: the outer side end wall of the annular plate is fixedly connected with the inner side end wall of the silencing plate, the number of the silencing partition plates correspondingly arranged at each air outlet is two, and the upper end and the lower end of each silencing partition plate are fixedly connected with the top end and the inner wall of the bottom end of the silencing plate respectively.

As a further aspect of the present invention: the stop blocks are fixedly connected with the inner side end walls of the silencing partition plates in a staggered mode, and the height of each stop block is larger than one half of the length between the adjacent silencing partition plates.

As a further aspect of the present invention: one end of the stop block close to the annular plate is fixedly connected with an arc-shaped silencing block, and the arc-shaped silencing block is made of foam and silencing cotton which are mixed in proportion.

As a further aspect of the present invention: and the outer side end of the shell is fixed with silencing paint in a spraying mode.

Compared with the prior art, the beneficial effects of the utility model are that:

1. the utility model discloses in, engine exhaust can enter into ventilative section of thick bamboo through the intake pipe in, the bleeder vent that ventilative section of thick bamboo accessible outside end wall set up is with the even discharge of tail gas, the sound absorbing section of thick bamboo that sets up, damping device and shock attenuation gasbag can be with the kinetic energy of exhaust emissions department weakening, tail gas after weakening passes through the gas outlet afterwards and enters into the amortization baffle in, the baffle that sets up on the amortization baffle can weaken the kinetic energy of exhaust emissions once more with arc amortization piece once more, tail gas just can not produce the noise of high strength when discharging from the blast pipe because kinetic energy is too big and when the blast pipe striking like this, can follow the source that tail gas produced the noise through above-mentioned mode and eliminate the noise, the noise that produces when making exhaust emissions is effectively reduced.

2. The utility model discloses in, the acoustical panel, the amortization lacquer of setting can effectively reduce with the vacuum layer the utility model discloses noise that produces when making an uproar falls to exhaust emission makes the utility model discloses the effect of eliminating the noise when discharging tail gas is effectively improved.

Drawings

Fig. 1 is a schematic sectional structure view in a front view direction of a muffler of an engineering machine.

Fig. 2 is an enlarged schematic view of a portion a in fig. 1.

Fig. 3 is a schematic cross-sectional view of a sound-absorbing tube in a muffler of an engineering machine in a side view direction.

Fig. 4 is a schematic structural view of a part of a section in the front view direction of a damping device in a muffler of an engineering machine.

Fig. 5 is a schematic structural view of an annular plate in a front view direction in a muffler of an engineering machine.

In the figure: 1. a housing; 1-1, sound-deadening paint; 1-2, vacuum layer; 1-3, a sound-absorbing board; 2. an air inlet pipe; 3. a ventilation cylinder; 4. an annular plate; 4-1, air outlet; 5. a sound absorbing barrel; 5-1, a damping device; 5-1-1, sleeve; 5-1-2, a slide bar; 5-1-3, a limiting plate; 5-1-4, a spring; 5-2, a damping air bag; 6. a sound-deadening partition plate; 6-1, a stop block; 6-2, arc-shaped silencing blocks; 7. and an air outlet pipe.

Detailed Description

The technical solution of the present patent will be described in further detail with reference to the following embodiments.

Referring to fig. 1-5, a muffler for construction machinery comprises a casing 1, an air inlet pipe 2 is fixedly connected to the inner wall of the left side end of the casing 1, an air outlet pipe 7 is fixedly connected to the inner wall of the right side end of the casing 1, a ventilation cylinder 3 is fixedly connected to the right side end of the air inlet pipe 2, the ventilation cylinder 3 is arranged to uniformly discharge tail gas from ventilation holes formed in the outer end wall of the ventilation cylinder 3, so that the noise reduction effect of the sound absorption cylinder 5 on tail gas discharge is improved, the sound absorption cylinder 5 is arranged at the outer end of the ventilation cylinder 3 in a sleeved manner, an annular plate 4 is fixedly connected to the right side end of the ventilation cylinder 3, an air outlet 4-1 is arranged on the annular plate 4 in an annular array manner, a noise reduction partition plate 6 is arranged at the right side end of the air outlet 4-1, and the annular plate 4-1 and the air outlet 4-1 are arranged to separate tail gas weakened by the sound absorption cylinder 5 again, so as to weaken the kinetic energy discharged by tail gas later, the left end of a silencing partition plate 6 is fixedly connected with the right end wall of an annular plate 4, the inner side end of the silencing partition plate 6 is fixedly connected with a stop block 6-1, the inner side end wall of a shell 1 is fixedly provided with a silencing plate 1-3, a vacuum layer 1-2 is arranged between the shell 1 and the silencing plate 1-3, the center of the outer side end wall of a silencing cylinder 5 is fixedly connected with a damping air bag 5-2, the other end of the damping air bag 5-2 is fixedly connected with the inner wall of the silencing plate 1-3, the two sides of the damping air bag 5-2 are fixedly connected with a damping device 5-1, the damping device 5-1 comprises a sleeve 5-1-1, the bottom end of the sleeve 5-1-1 is fixedly connected with the inner wall of the silencing plate 1-3, and the other end of the sleeve 5-1-1 is fixedly provided with a sliding rod 5-1-2 in a sleeved mode, one end of the sliding rod 5-1-2, which is far away from the sleeve 5-1-1, is fixedly connected with the outer side end wall of the sound absorption barrel 5, one end of the sliding rod 5-1-2, which is arranged on the sleeve 5-1-1, is fixedly connected with a limiting plate 5-1-3, a spring 5-1-4 is fixed between the outer wall of the bottom end of the limiting plate 5-1-3 and the inner wall of the bottom end of the sleeve 5-1-1 in an abutting mode, and the damping device 5-1 and the damping air bag 5-2 are arranged to utilize elastic acting force to cooperate with the sound absorption barrel 5 to weaken kinetic energy of tail gas exhausted from the ventilation barrel 3, so that noise generated during tail gas emission is reduced.

The outer side end wall of the annular plate 4 is fixedly connected with the inner side end wall of the silencing plate 1-3, the number of the silencing partition plates 6 arranged corresponding to each air outlet 4-1 is two, the upper end and the lower end of each silencing partition plate 6 are respectively fixedly connected with the top end and the bottom end inner wall of the silencing plate 1-3, the stop blocks 6-1 are fixedly connected with the inner side end wall of each silencing partition plate 6 in a staggered arrangement mode, the height of each stop block 6-1 is larger than one half of the length between adjacent silencing partition plates 6, one end, close to the annular plate 4, of each stop block 6-1 is fixedly connected with the arc-shaped silencing block 6-2, the arranged stop plates and the arc-shaped silencing blocks 6-2 are used for weakening kinetic energy of weakened tail gas again, the speed of the tail gas during emission is reduced again, and therefore, the tail gas cannot generate high-intensity noise when the tail gas collides with the exhaust pipe due to overlarge kinetic energy when being exhausted from the exhaust pipe, thereby the noise that produces when can making engineering machine tool exhaust emission effectively reduces, and the material of arc amortization piece 6-2 is formed by bubble cotton and the cotton proportional mixing of amortization, the mode that casing 1 outside end was passed through the spraying is fixed with amortization lacquer 1-1, and the acoustical panel 1-3, amortization lacquer 1-1 and the vacuum layer 1-2 of setting can effectively reduce the utility model discloses noise that produces when making an uproar falls to exhaust emission makes the utility model discloses the effect of eliminating the noise when discharging tail gas is effectively improved.

The utility model discloses a theory of operation is: firstly, high kinetic energy tail gas generated by an engine of an engineering machine can enter a ventilation cylinder 3 through an air inlet pipe 2, the ventilation cylinder 3 can separately discharge the tail gas through air holes arranged on the end wall of the outer side of the ventilation cylinder, meanwhile, a damping device 5-1 and a damping air bag 5-2 which are arranged can utilize elastic acting force to be matched with a sound absorption cylinder 5 to weaken the kinetic energy of the tail gas discharged from the ventilation cylinder 3, so that the noise generated during the tail gas discharge is reduced, the weakened tail gas enters a silencing partition plate 6 through an air outlet 4-1 arranged on an annular plate 4, a baffle plate and an arc-shaped silencing block 6-2 which are arranged in the silencing partition plate 6 can weaken the kinetic energy of the weakened tail gas again, so that the speed during the tail gas discharge is reduced again, and the tail gas cannot generate high-strength noise when the tail gas collides with an exhaust pipe due to overlarge kinetic energy during the tail gas discharge from the exhaust pipe, thereby the noise that produces when can making engineering machine tool exhaust emission effectively reduces, and the tail gas after weakening the completion can be followed the blast pipe and discharged, also can not produce comparatively strong noise simultaneously, simultaneously the utility model discloses to the in-process that tail gas kinetic energy weakens, the acoustical panel 1-3, amortization lacquer 1-1 and the vacuum layer 1-2 of setting can effectively reduce the utility model discloses noise that produces when making an uproar falls to exhaust emission makes the utility model discloses the effect of eliminating the noise when discharging tail gas is effectively improved.

Although the preferred embodiments of the present patent have been described in detail, the present patent is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present patent within the knowledge of those skilled in the art.

Claims

1. The utility model provides an engineering machinery silencer, includes casing (1), casing (1) left side end inner wall fixedly connected with intake pipe (2), casing (1) right side end inner wall fixedly connected with outlet duct (7), its characterized in that, intake pipe (2) right side end fixedly connected with ventilative section of thick bamboo (3), ventilative section of thick bamboo (3) outside end is equipped with a sound absorption section of thick bamboo (5) through the mode that cup joints, ventilative section of thick bamboo (3) right side end fixedly connected with annular plate (4), be equipped with gas outlet (4-1) through the mode of annular array on annular plate (4), gas outlet (4-1) right side end is equipped with amortization baffle (6), amortization baffle (6) left side end and annular plate (4) right side end wall fixed connection, amortization baffle (6) inboard end fixedly connected with dog (6-1).

2. A muffler for construction machinery according to claim 1, wherein a sound-absorbing plate (1-3) is fixed to an inner end wall of the housing (1), and a vacuum layer (1-2) is provided between the housing (1) and the sound-absorbing plate (1-3).

3. The muffler of engineering machinery according to claim 1, wherein the center of the outer end wall of the sound absorption barrel (5) is fixedly connected with a damping air bag (5-2), the other end of the damping air bag (5-2) is fixedly connected with the inner wall of the sound absorption plate (1-3), two side ends of the damping air bag (5-2) are fixedly connected with a damping device (5-1), the damping device (5-1) comprises a sleeve (5-1-1), the bottom end of the sleeve (5-1-1) is fixedly connected with the inner wall of the sound absorption plate (1-3), the other end of the sleeve (5-1-1) is fixedly provided with a sliding rod (5-1-2) in a sleeving manner, one end of the sliding rod (5-1-2) far away from the sleeve (5-1-1) is fixedly connected with the outer end wall of the sound absorption barrel (5), the sliding rod (5-1-2) is arranged at one end of the sleeve (5-1-1) and is fixedly connected with a limiting plate (5-1-3), and a spring (5-1-4) is fixed between the outer wall of the bottom end of the limiting plate (5-1-3) and the inner wall of the bottom end of the sleeve (5-1-1) in an abutting mode.

4. The muffler for engineering machinery according to claim 1, wherein the outer end wall of the annular plate (4) is fixedly connected with the inner end wall of the muffler plate (1-3), two muffler baffles (6) are correspondingly arranged at each air outlet (4-1), and the upper and lower ends of each muffler baffle (6) are respectively fixedly connected with the top end and the bottom end inner wall of the muffler plate (1-3).

5. The muffler for construction machinery as claimed in claim 1, wherein the stoppers (6-1) are fixedly attached to the inner side end walls of the silencing partition plates (6) in a staggered manner, and the height of the stopper (6-1) is greater than one-half of the length between adjacent silencing partition plates (6).

6. The muffler of the engineering machinery as claimed in claim 5, wherein the end of the stopper (6-1) close to the annular plate (4) is fixedly connected with an arc-shaped silencing block (6-2), and the arc-shaped silencing block (6-2) is made of foam and silencing cotton which are mixed in proportion.

7. The muffler for construction machinery as claimed in claim 2, wherein the outer end of the housing (1) is fixed with sound deadening paint (1-1) by spraying.