CN219865397U - Multistage amortization structure of electron vacuum pump - Google Patents

Abstract

The utility model discloses a multistage silencing structure of an electronic vacuum pump, which relates to the technical field of electronic vacuum pumps and comprises a three-stage silencing mechanism, wherein the three-stage silencing mechanism comprises a silencing cavity, the inner wall of the silencing cavity is movably connected with a toothed ring, the inside of the silencing cavity is movably connected with three groups of gears, the outer walls of the three groups of gears are meshed with racks, and the tops of the three groups of racks are fixedly provided with movable plates. According to the utility model, three groups of gears are simultaneously rotated by arranging the toothed rings, and the clockwise and anticlockwise rotation of the three groups of gears is alternately performed, so that three groups of racks are driven to reciprocate, the three groups of racks drive the three groups of movable plates to reciprocate, abrupt change of the ventilation cross section in the silencing cavity is realized by arranging the three groups of movable plates, and reflection and interference of sound energy are generated due to change of impedance, so that the sound energy radiated outwards by the silencer is reduced, and the silencing purpose is achieved.

Description

Multistage amortization structure of electron vacuum pump

Technical Field

The utility model relates to the technical field of electronic vacuum pumps, in particular to a multistage silencing structure of an electronic vacuum pump.

Background

The electronic vacuum pump adopts piezoelectric material as power device (completely abandoning motor driving mode), and completely realizes electronization from control to driving, the vacuum pump silencer is used for reducing exhaust noise of the vacuum pump, the section of an air flow channel of an exhaust system of the vacuum pump silencer has the characteristic of multiple abrupt change, the composite silencing design can be carried out by utilizing the characteristic, the exhaust noise of the vacuum pump can be effectively reduced, and the vacuum pump silencer is developed according to the principle of resisting, spraying and resisting composite silencing. The existing silencing structure is single and poor in silencing effect.

In the prior art, as disclosed in chinese patent CN213711340U, an "electronic vacuum pump silencing device and electronic vacuum pump" includes a first silencing cavity in the middle part and a second silencing cavity disposed around the silencing cavity, a first air port for communicating with an air outlet of a working cavity of the electronic vacuum pump is provided in the middle part of the first silencing cavity, the second silencing cavity is communicated with the second silencing cavity and the first silencing cavity, a plurality of separators are provided in the second silencing cavity, the separators divide the second silencing cavity into a plurality of air chambers, and the separators of adjacent air chambers are communicated by providing a first air flow gap.

However, in the prior art, the noise reduction structure is single, the noise reduction effect for high frequency or low frequency is poor, the noise reduction of full frequency noise cannot be achieved, the noise of the electronic vacuum pump can produce noise pollution, the working environment is damaged, and the electronic vacuum pump multistage noise reduction structure is provided for the problems.

Disclosure of Invention

The utility model aims to solve the problems that the silencing structure is single, the silencing effect on high-frequency or low-frequency noise is poor, the silencing of full-frequency noise cannot be realized, the noise of an electronic vacuum pump can produce noise pollution, and the working environment is damaged in the prior art.

In order to achieve the above purpose, the present utility model adopts the following technical scheme: the utility model provides an electronic vacuum pump multistage amortization structure, includes tertiary amortization mechanism, tertiary amortization mechanism includes the amortization chamber, the inner wall swing joint in amortization chamber has the ring gear, the inside swing joint in amortization chamber has three group's gears, and three group the outer wall of gear all meshes there is the rack, and three group the equal fixed mounting in top of rack has the fly leaf.

Preferably, the top of tertiary amortization mechanism is provided with second grade amortization mechanism, second grade amortization mechanism includes two sets of resonant cavities and inhales the sound pole, two sets of the top in resonant cavities all runs through and installs the pipe, two sets of the bottom of pipe is all fixed mounting has the sheetmetal, two sets of the bottom in resonant cavities is all fixed mounting has the siphunculus.

Preferably, the top of second grade amortization mechanism is provided with one-level amortization mechanism, one-level amortization mechanism includes the amortization cabin, the inner wall fixed mounting in amortization cabin has the sound cotton of inhaling, the top fixed mounting in amortization cabin has the abatvoix.

Preferably, the top of amortization cabin runs through and installs the radio tube, the top of inhaling the sound pole and the top fixed connection in amortization cabin, two sets of the top of pipe all with the bottom fixed connection in amortization cabin.

Preferably, the outer walls of the three groups of gears are meshed with the outer wall of the toothed ring, and the bottom of one group of gears is fixedly provided with a motor.

Preferably, the bottoms of the two groups of the through pipes are fixedly connected with the top of the silencing cavity, and the bottoms of the sound absorbing rods are fixedly connected with the top of the silencing cavity.

Preferably, the outer walls of the three groups of racks are all penetrated and arranged on the outer wall of the silencing cavity, and the two groups of metal sheets are respectively arranged in the two groups of resonant cavities.

Compared with the prior art, the utility model has the advantages and positive effects that:

1. according to the utility model, three groups of gears are rotated simultaneously by arranging the toothed rings, and the clockwise and anticlockwise rotation of the three groups of gears is performed alternately, so that three groups of racks reciprocate, the three groups of racks drive the three groups of movable plates to reciprocate, abrupt change of the ventilation cross section in the silencing cavity is realized by arranging the three groups of movable plates, and reflection and interference of sound energy are generated due to change of impedance, so that the sound energy radiated outwards by the silencer is reduced, and the silencing purpose is achieved.

2. According to the utility model, the sound absorbing plate and the sound absorbing cotton are arranged to carry out noise elimination on middle-high frequency noise, most of noise is absorbed, and the two groups of resonant cavities are arranged, so that when noise sound waves are incident on the metal sheet, a part of sound energy is reflected back to the sound source due to sudden change of the sound impedance, under the action of the sound waves, the air column in the aperture vibrates, and the friction damping during vibration converts a part of sound energy into heat energy to dissipate, so that only a small amount of sound energy is radiated, and the noise elimination effect is achieved.

Drawings

Fig. 1 is a schematic perspective view of a multi-stage silencing structure of an electronic vacuum pump according to the present utility model;

fig. 2 is an exploded view of a multi-stage silencing structure of an electronic vacuum pump according to the present utility model;

FIG. 3 is an exploded view of a three-dimensional structure of a secondary silencing mechanism and a primary silencing mechanism of the multi-stage silencing structure of the electronic vacuum pump;

fig. 4 is an exploded view of a three-stage silencing mechanism of the multi-stage silencing structure of the electronic vacuum pump.

Legend description: 1. a radio tube; 2. a secondary silencing mechanism; 21. a conduit; 22. a metal sheet; 23. a resonant cavity; 24. a through pipe; 25. a sound absorbing rod; 3. a third-stage silencing mechanism; 31. a sound deadening chamber; 32. a toothed ring; 33. a gear; 34. a rack; 35. a movable plate; 4. a primary silencing mechanism; 41. a silencing cabin; 42. sound absorbing cotton; 43. an acoustic panel.

Detailed Description

In order that the above objects, features and advantages of the utility model will be more clearly understood, a further description of the utility model will be rendered by reference to the appended drawings and examples. It should be noted that, without conflict, the embodiments of the present utility model and features in the embodiments may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, however, the present utility model may be practiced otherwise than as described herein, and therefore the present utility model is not limited to the specific embodiments of the disclosure that follow.

Example 1

As shown in fig. 1, fig. 2 and fig. 4, the utility model provides a multistage silencing structure of an electronic vacuum pump, which comprises a three-stage silencing mechanism 3, wherein the three-stage silencing mechanism 3 comprises a silencing cavity 31, the inner wall of the silencing cavity 31 is movably connected with a toothed ring 32, three groups of gears 33 are movably connected in the silencing cavity 31, the outer walls of the three groups of gears 33 are all meshed with racks 34, movable plates 35 are fixedly arranged at the tops of the three groups of racks 34, the outer walls of the three groups of gears 33 are all meshed with the outer walls of the toothed ring 32, a motor is fixedly arranged at the bottom of one group of gears 33, the bottoms of two groups of through pipes 24 are fixedly connected with the top of the silencing cavity 31, the bottom of a sound absorbing rod 25 is fixedly connected with the top of the silencing cavity 31, and the outer walls of the three groups of racks 34 are all penetrated and arranged on the outer wall of the silencing cavity 31.

In the following, the specific setting and action of the embodiment will be specifically described, noise after two times of silencing enters the silencing cavity 31 from the two groups of through pipes 24, the motor is started, one group of gears 33 rotates to drive the toothed ring 32 to rotate, the toothed ring 32 drives the other two groups of gears 33 to rotate, the three groups of gears 33 respectively drive the three groups of racks 34 to move, the three groups of gears 33 simultaneously rotate through the arrangement of the toothed ring 32, the clockwise rotation and the anticlockwise rotation of the three groups of gears 33 are alternately performed, the three groups of racks 34 are further realized to reciprocate, the three groups of racks 34 drive the three groups of movable plates 35 to reciprocate, the mutation of the ventilation section inside the silencing cavity 31 is realized through the arrangement of the three groups of movable plates 35, the change of impedance is caused to generate reflection and interference of sound energy, and the sound energy radiated outwards by the silencer is reduced, so that the silencing purpose is achieved.

Example two

As shown in fig. 1-3, the top of the three-stage silencing mechanism 3 is provided with a two-stage silencing mechanism 2, the two-stage silencing mechanism 2 comprises two groups of resonant cavities 23 and sound absorbing rods 25, the tops of the two groups of resonant cavities 23 are all provided with guide pipes 21 in a penetrating mode, the bottoms of the two groups of guide pipes 21 are all fixedly provided with metal sheets 22, the bottoms of the two groups of resonant cavities 23 are all fixedly provided with through pipes 24, the top of the two-stage silencing mechanism 2 is provided with a one-stage silencing mechanism 4, the one-stage silencing mechanism 4 comprises a silencing cabin 41, the inner wall of the silencing cabin 41 is fixedly provided with sound absorbing cotton 42, the top of the silencing cabin 41 is fixedly provided with a sound absorbing plate 43, the top of the silencing cabin 41 is provided with a radio pipe 1 in a penetrating mode, the top of the sound absorbing rods 25 are fixedly connected with the top of the silencing cabin 41, the tops of the two groups of guide pipes 21 are all fixedly connected with the bottom of the silencing cabin 41, and the two groups of metal sheets 22 are respectively arranged inside the two groups of resonant cavities 23.

The effect that its whole embodiment reaches is, the noise gets into the inside of amortization cabin 41 from radio tube 1, through being provided with abatvoix 43 and inhale the sound cotton 42, carry out amortization to the medium-high frequency noise, absorb most noise, the noise gets into inside two sets of resonant cavity 23 from two sets of pipes 21, through setting up two sets of resonant cavity 23, when noise sound wave is incident to sheetmetal 22, because of the sudden change of acoustic impedance, a part acoustic energy will reflect back the sound source, under the effect of sound wave, the air column in the aperture produces the vibration, the friction damping when vibrating makes a part acoustic energy conversion heat energy dissipation again, only a small amount of acoustic energy radiates away, thereby the effect of silencing has been reached, the noise enters into the amortization cavity 31 from two sets of siphunculus 24 inside, play the supporting role to amortization cabin 41 through setting up the sound absorbing rod 25.

The application method and the working principle of the device are as follows: noise enters the silencing cabin 41 from the sound receiving pipe 1, the sound absorbing plate 43 and the sound absorbing cotton 42 are used for silencing middle-high frequency noise, noise sound waves enter the metal sheet 22 from the two groups of guide pipes 21 and enter the two groups of resonant cavities 23, a small amount of sound energy is radiated to enter the silencing cavity 31 from the two groups of through pipes 24, a motor is started, one group of gears 33 rotate to drive the toothed ring 32 to rotate, the toothed ring 32 drives the other two groups of gears 33 to rotate, the three groups of gears 33 respectively drive the three groups of racks 34 to move, the three groups of racks 34 drive the three groups of movable plates 35 to reciprocate, mutation of the ventilation cross section of the silencing cavity 31 is realized, and sound energy radiated outwards is reduced.

The present utility model is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present utility model without departing from the technical content of the present utility model still belong to the protection scope of the technical solution of the present utility model.

Claims (7)

1. The utility model provides an electronic vacuum pump multistage amortization structure, includes tertiary amortization mechanism (3), its characterized in that: the three-stage silencing mechanism (3) comprises a silencing cavity (31), a second-stage silencing mechanism (2) is arranged at the top of the three-stage silencing mechanism (3), a first-stage silencing mechanism (4) is arranged at the top of the second-stage silencing mechanism (2), a toothed ring (32) is movably connected to the inner wall of the silencing cavity (31), three groups of gears (33) are movably connected to the inner side of the silencing cavity (31), racks (34) are meshed with the outer walls of the gears (33), and movable plates (35) are fixedly mounted at the tops of the racks (34).

2. The multi-stage silencing structure of an electronic vacuum pump of claim 1, wherein: the two-stage silencing mechanism (2) comprises two groups of resonant cavities (23) and sound absorbing rods (25), wherein the tops of the two groups of resonant cavities (23) are respectively provided with a guide pipe (21) in a penetrating mode, the bottoms of the two groups of guide pipes (21) are respectively provided with a metal sheet (22) in a fixed mode, and the bottoms of the two groups of resonant cavities (23) are respectively provided with a through pipe (24) in a fixed mode.

3. The multi-stage silencing structure of the electronic vacuum pump according to claim 2, wherein: the primary silencing mechanism (4) comprises a silencing cabin (41), sound absorbing cotton (42) is fixedly arranged on the inner wall of the silencing cabin (41), and a sound absorbing plate (43) is fixedly arranged on the top of the silencing cabin (41).

4. A multi-stage silencing structure of an electronic vacuum pump according to claim 3, wherein: the top of amortization cabin (41) runs through and installs radio tube (1), the top of sound absorbing pole (25) and the top fixed connection of amortization cabin (41), two sets of the top of pipe (21) all with the bottom fixed connection of amortization cabin (41).

5. The multi-stage silencing structure of an electronic vacuum pump of claim 1, wherein: the outer walls of the three groups of gears (33) are meshed with the outer wall of the toothed ring (32), and a motor is fixedly arranged at the bottom of one group of gears (33).

6. The multi-stage silencing structure of the electronic vacuum pump according to claim 2, wherein: the bottoms of the two groups of the through pipes (24) are fixedly connected with the top of the silencing cavity (31), and the bottoms of the sound absorbing rods (25) are fixedly connected with the top of the silencing cavity (31).

7. The multi-stage silencing structure of the electronic vacuum pump according to claim 2, wherein: the outer walls of the three groups of racks (34) are all penetrated through the outer wall of the silencing cavity (31), and the two groups of metal sheets (22) are respectively arranged in the two groups of resonant cavities (23).