CN213928557U

CN213928557U - Low-noise generator

Info

Publication number: CN213928557U
Application number: CN202023307503.3U
Authority: CN
Inventors: 胡尚颂
Original assignee: Zhejiang Beilide Electromechanical Co ltd
Current assignee: Zhejiang Beilide Electromechanical Co ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2021-08-10
Anticipated expiration: 2030-12-31

Abstract

The utility model discloses a low-noise generator, including gasoline engine and generating set, the gasoline engine includes casing and end cover, the end cover sets up the terminal surface at the casing to make the casing form an acting cavity, the inner wall of acting cavity is equipped with a plurality of slots, the slot interpolation is equipped with sound absorbing device, sound absorbing device includes the body that has the caulking groove, inlays the first abatvoix of establishing in the caulking groove, just there are a plurality of bell mouths to the regional array of first abatvoix on the medial surface of body, the great one end of bell mouth diameter is towards the acting cavity, and the less one end of diameter is towards first abatvoix; the first sound absorption plate is a honeycomb plate, a plurality of first through holes are uniformly distributed in the first sound absorption plate, and the first through holes correspond to the conical holes one to one. The utility model discloses an inhale the sound device, isolated the outside transmission of acting cavity noise to improve noise reduction effect rate greatly.

Description

Low-noise generator

Technical Field

The utility model belongs to the technical field of the generator, concretely relates to low noise generator.

Background

The generator generally comprises a motor and a generator set, wherein the generator set is driven by the motor to work so as to output electric energy, and the generator is used for household or agricultural use and the like, wherein the motor is a gasoline engine. When the generator works, the noise of the gasoline engine is relatively high, and under the noise of the gasoline engine, the noise generated when the generator set runs is ignored, so how to reduce the noise of the gasoline engine becomes the research and development direction of the low-noise generator.

Disclosure of Invention

Therefore, the main objective of the present invention is to solve the above problems and to provide a low noise generator.

In order to achieve the above object, the technical solution adopted by the present invention is to provide a low noise generator, including a gasoline engine and a generator set, the gasoline engine includes a casing and an end cover, the end cover is disposed on the end surface of the casing, so as to form an acting cavity in the casing, a plurality of slots are disposed on the inner wall of the acting cavity, a sound absorption device is inserted in the slots, the sound absorption device includes a body with a caulking groove, and a first sound absorption plate embedded in the caulking groove, a plurality of taper holes are disposed on the inner side surface of the body just opposite to the area array of the first sound absorption plate, the end with larger diameter of the taper hole faces the acting cavity, and the end with smaller diameter faces the first sound absorption plate; the first sound absorption plate is a honeycomb plate, a plurality of first through holes are uniformly distributed in the first sound absorption plate, and the first through holes correspond to the conical holes one to one.

The outer side surface of the body is provided with an embedding hole, a second sound-absorbing plate is embedded in the embedding hole, and the second sound-absorbing plate comprises a flange plate which is embedded in the embedding hole and is attached to the first sound-absorbing plate, a mounting plate which is integrally formed with the flange plate, and a third sound-absorbing plate which is arranged in a groove in the outer side surface of the mounting plate; a buffer space is arranged on the outer side face, attached to the first sound absorption plate, of the flange plate and is communicated with the first through holes; a flow guide channel is arranged in the mounting plate, and the flow guide channel is communicated with the buffer space through a plurality of second through holes; and the flow guide channel is communicated with the upper end and the lower end of the third sound-absorbing board.

The first through holes and the second through holes are arranged in a staggered mode.

The second sound-absorbing board is a honeycomb board.

The second sound-absorbing plate is made of a ceramic heat-insulating material, and the third sound-absorbing plate is a rubber plate.

The utility model has the advantages that:

compared with the prior art, the utility model discloses a low noise generator through inhaling the sound device, has completely cut off the outside transmission of acting cavity internal noise to improve noise reduction effect greatly.

Drawings

Fig. 1 is a perspective view of the low noise generator of the present invention;

FIG. 2 is a cross-sectional view of the gasoline engine of the low noise generator of the present invention;

fig. 3 is an enlarged view of a portion a of fig. 2.

Detailed Description

The invention will be described in further detail with reference to the following drawings and detailed description:

referring to fig. 1 and 3, the utility model provides a low noise generator, including 1-1 gasoline engine and 2-1 generating set, 1-1 gasoline engine includes casing 1 and end cover 2, end cover 2 sets up the terminal surface at casing 1 to make the casing 1 form a work chamber 3, be equipped with a plurality of slots 4 at the inner wall of work chamber 3, the interpolation of slot 4 is equipped with sound absorbing device 5, sound absorbing device 5 includes body 7 with caulking groove 6, inlays the first abatvoix 8 of establishing in caulking groove 6, the regional array that just faces first abatvoix 8 on the medial surface of body 7 has a plurality of bell mouth 9, the great one end of bell mouth 9 diameter is towards work chamber 3, the less one end of diameter is towards first abatvoix 8; the first sound-absorbing board 8 is a honeycomb board, a plurality of first through holes 10 are uniformly distributed on the first sound-absorbing board 8, and the first through holes 10 correspond to the conical holes 9 one by one.

An embedding hole 11 is formed in the outer side face of the body 7, a second sound-absorbing plate 12 is embedded in the embedding hole 11, and the second sound-absorbing plate 12 comprises a flange plate 13 which is embedded in the embedding hole 11 and attached to the first sound-absorbing plate 8, a mounting plate 14 which is integrally formed with the flange plate 13, and a third sound-absorbing plate 16 which is arranged in a groove 15 in the outer side face of the mounting plate 14; a buffering space 17 is arranged on the outer side surface, attached to the first sound-absorbing plate 8, of the flange plate 13, and the buffering space 17 is communicated with the first through holes 10; a flow guide channel 18 is arranged in the mounting plate 14, and the flow guide channel 18 is communicated with the buffer space 17 through a plurality of second through holes 19; the flow guide passage 18 extends through the third sound-absorbing panel 16 to the upper and lower ends thereof.

The first through hole 10 and the second through hole 19 are arranged in a staggered manner, so that the transmission path of noise is longer and more curved.

The second sound-absorbing panel 12 is a honeycomb panel.

The second sound-absorbing plate 12 is made of a ceramic heat-insulating material, and the third sound-absorbing plate 16 is a rubber plate.

The utility model discloses a low noise generator, the noise transmission that each mechanism work in the working cavity 3 produced to bell mouth 9, because the great one end of bell mouth 9 diameter is towards working cavity 3, so, the noise can accelerate and get into first abatvoix 8 to transmit to buffer space 17, water conservancy diversion passageway 18 and third abatvoix 16 through first through-hole 10, at this in-process, first abatvoix 8 and second abatvoix 12 have been flowed through to the noise. Specifically, the noise entering the first through holes 10 can be quickly absorbed by the honeycomb structure of the first sound-absorbing plate 8, and the unabsorbed noise enters the buffer space 17 and then enters the second through holes 19, and is further absorbed by the honeycomb structure of the second sound-absorbing plate 12 to remove a part of noise; and the rest noise is continuously transmitted outwards and is transmitted to the third sound-absorbing plate 16 through the flow guide channel 18, the third sound-absorbing plate 16 is a rubber plate, the rubber plate generates certain vibration due to the noise, and the noise is further absorbed through physical vibration, so that the purpose of reducing the noise is achieved.

The first sound-absorbing plate 8 is made of metal, and the third sound-absorbing plate 16 is made of rubber, so that the second sound-absorbing plate 12 is made of ceramic heat-insulating materials in particular to avoid the problems of service life reduction and the like caused by high temperature during the operation of the gasoline engine 1-1, and the third sound-absorbing plate 16 is protected.

In addition, when the sound absorption device is assembled, the whole of the first sound absorption plate 8, the second sound absorption plate 12 and the third sound absorption plate 16 which are arranged together only needs to be inserted into the slot 4, and the whole sound absorption device 5 is a whole and is made of metal and nonmetal combined materials, so that the strength of the whole machine shell 1 cannot be reduced after being embedded into the slot 4, and the safety is guaranteed. In addition, the sound absorption device 5 with the plug-in structure can be replaced.

To sum up, the utility model discloses a low noise generator has three and falls the structure of making an uproar, has improved the performance of making an uproar greatly.

The low-noise generator provided by the embodiment of the present invention is described in detail above, and the principle and the implementation of the present invention are explained by applying a specific example, and the description of the above embodiment is only used to help understanding the technical solution disclosed by the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the specific implementation and application scope, to sum up, the content of the present specification should not be understood as the limitation of the present invention.

Claims

1. The utility model provides a low noise generator, includes gasoline engine and generating set, the gasoline engine includes casing and end cover, the end cover sets up the terminal surface at the casing to make and form a work chamber in the casing, its characterized in that: the inner wall of the working cavity is provided with a plurality of slots, sound absorption devices are inserted in the slots and comprise bodies with caulking grooves and first sound absorption plates embedded in the caulking grooves, a plurality of conical holes are formed in the inner side surfaces of the bodies and are aligned to the first sound absorption plates, one end of each conical hole with a larger diameter faces the working cavity, and the other end of each conical hole with a smaller diameter faces the first sound absorption plates; the first sound absorption plate is a honeycomb plate, a plurality of first through holes are uniformly distributed in the first sound absorption plate, and the first through holes correspond to the conical holes one to one.

2. The low noise generator of claim 1, wherein: the outer side surface of the body is provided with an embedding hole, a second sound-absorbing plate is embedded in the embedding hole, and the second sound-absorbing plate comprises a flange plate which is embedded in the embedding hole and is attached to the first sound-absorbing plate, a mounting plate which is integrally formed with the flange plate, and a third sound-absorbing plate which is arranged in a groove in the outer side surface of the mounting plate; a buffer space is arranged on the outer side face, attached to the first sound absorption plate, of the flange plate and is communicated with the first through holes; a flow guide channel is arranged in the mounting plate, and the flow guide channel is communicated with the buffer space through a plurality of second through holes; and the flow guide channel is communicated with the upper end and the lower end of the third sound-absorbing board.

3. The low noise generator of claim 2, wherein: the first through holes and the second through holes are arranged in a staggered mode.

4. The low noise generator of claim 2, wherein: the second sound-absorbing board is a honeycomb board.

5. The low noise generator of claim 2, wherein: the second sound-absorbing plate is made of a ceramic heat-insulating material, and the third sound-absorbing plate is a rubber plate.