CN219529319U - Roots blower silencing device - Google Patents

Abstract

The utility model discloses a Roots blower silencing device, which comprises a noise reduction box body, wherein damping assemblies are arranged on the left side and the right side of the bottom of an inner cavity of the noise reduction box body, a Roots blower main body is arranged on the damping assemblies and a top bolt of a sliding rod, an air inlet end and an air outlet end of the Roots blower main body are both communicated with flexible hoses, a silencing cylinder is arranged at one end, far away from the Roots blower main body, of each flexible hose, the silencing cylinder comprises a base shell, a flow blocking assembly is arranged in the inner cavity of the base shell, and an illuminating lamp is fixedly arranged on the right side of the top of the inner cavity of the noise reduction box body. According to the utility model, the fixing sleeve, the compression spring, the downward moving plate and the guide rod are matched for use, so that the Roots blower main body can be buffered and damped, and the practicability is improved; through adopting the cooperation of noise elimination section of thick bamboo, choke plate, elastic sealing pad, connecting plate, torsional spring and connecting rod to use, can carry out noise elimination protection to roots fan main part, improved result of use.

Description

Roots blower silencing device

Technical Field

The utility model relates to the technical field of Roots fans, in particular to a Roots fan silencer.

Background

The Roots blower is a positive displacement blower, two three-blade impellers rotate relatively in a space sealed by a casing and a wallboard, and as each impeller adopts involute or epicycloidal envelope, three blades of each impeller are identical, and two impellers are identical, so that the processing difficulty is greatly reduced, numerical control equipment is adopted when the impellers are processed, and certain minimum clearance can be kept no matter what position the two impellers rotate under the condition of unchanged center distance, thereby ensuring that gas leakage is in an allowable range.

The utility model patent of patent application publication number CN210738818U discloses a silencing device for Roots blower, which comprises a telescopic pipe, wherein sleeve rings are symmetrically arranged at the left end and the right end of the telescopic pipe, an air bag ring is fixedly arranged in the sleeve rings, a connecting pipe communicated with the air bag ring is fixedly arranged on the surface of the sleeve rings, an air bag is fixedly arranged at the other end of the connecting pipe, liquid through pipes are symmetrically fixed at the upper side and the lower side of the sleeve rings, a guide pipe is communicated between the liquid through pipes and the telescopic pipe, a through hole communicated with the guide pipe is formed in the side wall of the liquid through pipe, an end cover is arranged at the outer end of the liquid through pipe, and a sliding rod is arranged in the middle of the end cover. The utility model has simple structure and reasonable design, utilizes the mode of introducing water to the surfaces of the air inlet pipe and the air outlet pipe of the Roots blower, and uses water to wrap the air inlet pipe and the air outlet pipe, thereby being convenient for realizing noise reduction, improving the noise reduction effect of the Roots blower, meeting the social requirement and being worthy of being popularized to the Roots blower field.

However, the device still has some defects in actual use, and obviously, the device does not have the function of auxiliary shock absorption, the fan works continuously to vibrate to easily generate larger noise, the air inlet and outlet can not be subjected to flow resistance and noise elimination protection, the larger noise exists in the high-speed airflow flowing, a certain limitation exists, and the practicability of the silencer is reduced.

Therefore, it is necessary to invent a Roots blower muffler to solve the above problems.

Disclosure of Invention

The utility model aims to provide a Roots blower silencing device, which has the advantages of auxiliary damping and flow resistance silencing, and solves the problems that the device does not have the auxiliary damping function, the blower is easy to generate larger noise when working continuously, the flow resistance silencing protection can not be carried out on an air inlet and outlet position, and the larger noise exists when the airflow flows at a high speed.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the utility model provides a roots fan silencing device, includes the box of making an uproar falls, damping module is all installed to the left and right sides of box inner chamber bottom of making an uproar falls, roots fan main part is installed with the top bolt of slide bar to damping module, the air inlet end and the air-out end of roots fan main part all communicate there is flexible hose, flexible hose keeps away from the one end of roots fan main part and installs the sound attenuation section of thick bamboo, the sound attenuation section of thick bamboo includes the basal shell, the choke subassembly is installed to the inner chamber of basal shell, the right side fixed mounting at box inner chamber top of making an uproar falls has the light.

Preferably, one end of the base shell is communicated with one end of the telescopic hose, the other end of the base shell penetrates through the outer portion of the noise reduction box body, the sound absorption cotton sleeve is fixedly connected to the inner portion of the base shell, and the sound insulation felt sleeve is fixedly connected to the surface of the sound absorption cotton sleeve.

Preferably, the damping assembly comprises a fixed sleeve, the bottom of the fixed sleeve is fixedly connected with the bottom of the inner cavity of the noise reduction box body, the top of the inner cavity of the fixed sleeve is fixedly connected with a compression spring, the top of the compression spring is fixedly connected with a downward moving plate, and the top of the downward moving plate is in bolt connection with the bottom of the Roots blower body.

Preferably, guide rods are fixedly arranged on the left side and the right side of the bottom of the fixed sleeve, and the tops of the guide rods penetrate through the bottom of the downward moving plate.

Preferably, the choke subassembly includes the connecting plate, the quantity of connecting plate is two, the junction fixed connection of the surface of connecting plate and basal shell, two connecting plates relative one side movable mounting have the connecting rod, the front and back both sides on connecting rod surface all overlap and are equipped with the torsional spring, the fixed cover in center department on connecting rod surface is equipped with the choke plate, one side fixedly connected with elastic sealing pad that the choke plate is close to the basal shell.

Preferably, one end of the torsion spring is fixedly connected with the connecting position of the choke plate, and the other end of the torsion spring is fixedly connected with the connecting position of the connecting plate.

Preferably, an auxiliary sleeve is fixedly arranged at the center of the bottom of the inner cavity of the noise reduction box body, a sliding rod is movably arranged in the inner cavity of the auxiliary sleeve, and the surface of the sliding rod is in sliding connection with the inner wall of the auxiliary sleeve.

Compared with the prior art, the utility model has the following beneficial effects:

the damping protection device has the advantages of damping protection by adopting the fixing sleeve, the compression spring, the downward moving plate and the guide rod to be matched, and can buffer and damp the Roots blower main body under the action of the compression spring as the Roots blower main body does not stop vibrating in the working state, so that the practicability is improved;

the utility model adopts the silencing cylinder, the wind blocking plate, the elastic sealing gasket, the connecting plate, the torsion spring and the connecting rod to be matched for use, has the advantage of flow blocking and silencing protection, has larger noise in the high-speed movement of the air flow in the actual use process, can carry out silencing protection on the Roots blower main body under the action of the silencing cylinder, and improves the use effect.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic elevational cross-sectional view of a sound damping cylinder of the present utility model;

FIG. 3 is a right side view of the choke assembly of the present utility model;

FIG. 4 is a schematic elevational cross-sectional view of a shock absorbing assembly of the present utility model.

In the figure: the noise reduction box body 1, the Roots blower body 2, the telescopic hose 3, the lighting lamp 4, the noise reduction cylinder 5, the basic shell 51, the sound absorption cotton sleeve 52, the sound insulation felt sleeve 53, the damping component 6, the fixed sleeve 61, the compression spring 62, the downward moving plate 63, the guide rod 64, the auxiliary sleeve 7, the sliding rod 8, the flow blocking component 9, the air blocking plate 91, the elastic sealing gasket 92, the connecting plate 93, the torsion spring 94 and the connecting rod 95.

Detailed Description

Referring to fig. 1-4, a Roots blower silencing device comprises a noise reduction box body 1, wherein a damping component 6 is installed on the left side and the right side of the bottom of the inner cavity of the noise reduction box body 1, a Roots blower main body 2 is installed on a top bolt of the damping component 6, an air inlet end and an air outlet end of the Roots blower main body 2 are both communicated with a telescopic hose 3, the telescopic hose 3 is arranged, the air inlet end and the air outlet end of the Roots blower main body 2 can be communicated with a silencing barrel 5 in a continuously vibrating state of the Roots blower main body 2, the silencing barrel 5 is installed at one end of the telescopic hose 3 far away from the Roots blower main body 2, the silencing barrel 5 comprises a base shell 51, a choke component 9 is installed in the inner cavity of the base shell 51, an illuminating lamp 4 is fixedly installed on the right side of the top of the inner cavity of the noise reduction box body 1, the illuminating lamp 4 is arranged, the auxiliary illumination function can be achieved under the working state, the brightness in the noise reduction box body 1 can be improved, and the overhaul operation of workers is facilitated;

one end of the base shell 51 is communicated with one end of the telescopic hose 3, the other end of the base shell 51 penetrates through the outer part of the noise reduction box body 1, a sound absorption cotton sleeve 52 is fixedly connected inside the base shell 51, a sound insulation felt sleeve 53 is fixedly connected to the surface of the sound absorption cotton sleeve 52, and through the arrangement of the sound absorption cotton sleeve 52 and the sound insulation felt sleeve 53, the effects of sound absorption and sound insulation can be respectively achieved, and the external conduction volume of sound can be effectively reduced;

the damping component 6 comprises a fixed sleeve 61, the bottom of the fixed sleeve 61 is fixedly connected with the bottom of the inner cavity of the noise reduction box body 1, the top of the inner cavity of the fixed sleeve 61 is fixedly connected with a compression spring 62, the top of the compression spring 62 is fixedly connected with a downward moving plate 63, and the top of the downward moving plate 63 is connected with the bottom of the Roots blower body 2 through bolts;

guide rods 64 are fixedly arranged on the left side and the right side of the bottom of the fixed sleeve 61, and the guide rods 64 can guide the up-and-down displacement of the downward moving plate 63, so that the moving stability of the downward moving plate 63 is effectively improved, and the top of the guide rods 64 penetrates through the bottom of the downward moving plate 63;

the choke assembly 9 comprises connecting plates 93, the number of the connecting plates 93 is two, the surface of the connecting plates 93 is fixedly connected with the joint of the base shell 51, a connecting rod 95 is movably arranged on one side, opposite to the two connecting plates 93, of the surface of the connecting rod 95, torsion springs 94 are sleeved on the front side and the rear side of the surface of the connecting rod, a choke plate 91 is fixedly sleeved on the center of the surface of the connecting rod 95, the choke plate 91 can be arranged in the base shell 51 by arranging the connecting plates 93 and the connecting rod 95, the choke plate 91 is in a rotatable state, an elastic sealing gasket 92 is fixedly connected to one side, close to the base shell 51, of the choke plate 91, the elastic sealing gasket 92 is arranged, the choke plate can be contacted with the base shell 51 to achieve an auxiliary sealing effect, and further compression space is provided, and the rotating track requirement of the choke plate 91 is met;

one end of the torsion spring 94 is fixedly connected with the connecting position of the choke plate 91, the other end of the torsion spring 94 is fixedly connected with the connecting position of the connecting plate 93, and the choke plate 91 is obliquely arranged;

the center department fixed mounting who falls box 1 inner chamber bottom has supplementary cover 7, and the inner chamber movable mounting of supplementary cover 7 has slide bar 8, through setting up supplementary cover 7 and slide bar 8, can play the effect of location guide for Roots blower main part 2 can carry out vertical direction vibration, the surface of slide bar 8 and the inner wall sliding connection of supplementary cover 7, the top of slide bar 8 and the bottom bolted connection of Roots blower main part 2.

When the noise reduction box is used, the Roots blower body 2 continuously vibrates in the working state, under the assistance of 7 and 8, the air flow is enabled to move up and down, the air flow is driven to be compressed or stretched, the amplitude of the Roots blower body 2 is reduced, the air flow 3 is lengthened or shortened, the noise reduction box body 1 can also play a role in reducing noise and noise for covering and protecting the Roots blower body 2, in the actual process, the air flow passes through the noise reduction cylinder 5, the air flow speed of the air flow can be reduced in an auxiliary mode due to the fact that the air flow baffle 91 is obliquely arranged, the purpose of assisting in reducing noise is achieved, the sound absorption cotton sleeve 52 is matched with the sound insulation felt sleeve 53 to further reduce noise generated by the air flow passing through the noise reduction cylinder 5, when the air flow speed is increased, the air flow can push the air baffle 91, the air flow is driven to rotate, the inclination angle of the air baffle 91 is changed, the elastic sealing gasket 92 is compressed, the torsion spring 94 is tightened, the air baffle 91 with the inclination angle changed can improve the effect of reducing the high-speed air flow, and when the air flow speed is reduced, the air flow speed is assisted, the air flow is reduced, and the air baffle 91 is reset automatically, and the inclination angle is reduced, so that a good protection effect is achieved.

To sum up: this roots fan silencing device through setting up fixed cover 61, compression spring 62, move down board 63, guide bar 64, sound damping cylinder 5, choke plate 91, elastic sealing pad 92, connecting plate 93, torsional spring 94 and connecting rod 95, has solved the device and has not had auxiliary damping function, and fan work constantly vibrates and produces great noise easily, and can't carry out choked flow noise elimination protection to the air inlet air-out department, and the air current high-speed flow also has the problem of great noise.

Claims (7)

1. The utility model provides a roots fan silencing device, includes case (1) of making an uproar, its characterized in that: damping module (6) are all installed to the left and right sides of box (1) inner chamber bottom of making an uproar, roots blower main part (2) are installed with the top bolt of slide bar (8) to damping module (6), the air inlet end and the air-out end of Roots blower main part (2) all are linked together flexible hose (3), noise elimination section of thick bamboo (5) are installed to the one end that Roots blower main part (2) was kept away from to flexible hose (3), noise elimination section of thick bamboo (5) include basal shell (51), choke subassembly (9) are installed to the inner chamber of basal shell (51), right side fixed mounting at box (1) inner chamber top of making an uproar has light (4) of making an uproar.

2. The Roots blower muffler device as set forth in claim 1, wherein: one end of the base shell (51) is communicated with one end of the telescopic hose (3), the other end of the base shell (51) penetrates through the outer portion of the noise reduction box body (1), a sound absorption cotton sleeve (52) is fixedly connected to the inner portion of the base shell (51), and a sound insulation felt sleeve (53) is fixedly connected to the surface of the sound absorption cotton sleeve (52).

3. The Roots blower muffler device as set forth in claim 1, wherein: the damping component (6) comprises a fixed sleeve (61), the bottom of the fixed sleeve (61) is fixedly connected with the bottom of the inner cavity of the noise reduction box body (1), the top of the inner cavity of the fixed sleeve (61) is fixedly connected with a compression spring (62), the top of the compression spring (62) is fixedly connected with a downward moving plate (63), and the top of the downward moving plate (63) is connected with the bottom of the Roots blower body (2) through bolts.

4. A Roots blower muffler according to claim 3, wherein: guide rods (64) are fixedly arranged on the left side and the right side of the bottom of the fixed sleeve (61), and the tops of the guide rods (64) penetrate through the bottom of the downward moving plate (63).

5. The Roots blower muffler device as set forth in claim 1, wherein: the choke subassembly (9) is including connecting plate (93), the quantity of connecting plate (93) is two, the junction fixed connection of the surface of connecting plate (93) and basal shell (51), one side movable mounting that two connecting plates (93) are relative has connecting rod (95), the front and back both sides on connecting rod (95) surface all overlap and are equipped with torsional spring (94), the fixed cover in center department on connecting rod (95) surface is equipped with choke plate (91), one side fixedly connected with elastic sealing pad (92) that choke plate (91) are close to basal shell (51).

6. The Roots blower muffler device according to claim 5, wherein: one end of the torsion spring (94) is fixedly connected with the connecting part of the choke plate (91), and the other end of the torsion spring (94) is fixedly connected with the connecting part of the connecting plate (93).

7. The Roots blower muffler device as set forth in claim 1, wherein: the noise reduction box is characterized in that an auxiliary sleeve (7) is fixedly arranged at the center of the bottom of the inner cavity of the noise reduction box body (1), a sliding rod (8) is movably arranged in the inner cavity of the auxiliary sleeve (7), and the surface of the sliding rod (8) is in sliding connection with the inner wall of the auxiliary sleeve (7).