Roots blower with noise reduction and sound attenuation functions

Abstract

The utility model discloses a Roots blower with a noise reduction function, which comprises a blower body, an air inlet pipe and an air outlet pipe are mounted on the blower body, and flange plates are mounted on the air inlet pipe and the air outlet pipe. The sound insulation cover is designed to be of an assembled structure formed by splicing the first cover shell, the second cover shell and the third cover shell, during installation, the second cover shell is attached to the air outlet pipe and the flange plate on the end side of the air outlet pipe, bolt rods are inserted into the corresponding bolt holes for fixation, and then nuts are screwed on the inner ends of the bolt rods. The first housing is attached to the air outlet pipe and the flange plate of the air outlet pipe according to the same operation, meanwhile, the first housing is attached to the side wall of the second housing, and finally, the third housing is installed from the notch to form the whole sound-proof housing, so that the sound-proof housing can be well matched with the installation requirement of the appearance of the Roots blower; and noise at the air port can be further reduced, and the use requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of Roots blower design, in particular to a Roots blower with noise reduction and silencing functions. Background Art

[0002] Roots blower is a positive displacement blower with a simple structure and easy manufacturing. It is suitable for gas delivery and pressurization in low-pressure situations. It can also be used as a vacuum pump. Its working principle is based on the rotation of the Roots impeller and the changes in the internal cavity. When the impeller rotates, the gas can be drawn in and compressed due to the very small gap between the impellers. As the impeller continues to rotate, the gas is pushed to the outlet of the casing, further compressed and discharged. In this process, the inlet valve and the outlet valve control the inlet and outlet of the gas respectively, ensuring that the gas can only flow in one direction.

[0003] At present, when the Roots blower is working, due to the high-frequency operation of the motor, it will generate extremely loud noise, which will then cause noise pollution. Therefore, in order to achieve the noise reduction function, the existing Roots blower will be equipped with a blower cover for use. For example, a Roots blower with a noise reduction structure disclosed in application number 202121423919.3 is effectively soundproofed by a soundproof cover.

[0004] However, after actual investigation, it was found that the existing sound insulation cover has certain shortcomings. First of all, the integrated design cannot adapt to the fan structure well. There are flanges at the outlet and inlet pipes, and the outlet and inlet pipes need to be exposed for external docking. This requires that one side of the sound insulation cover is designed with a buckle connected to the bottom to correspond to the pipe on one side of the blower, and the top needs to have a hole wider than the flange to pass through the top pipe of the blower. When using filler to seal the gap between the hole and the fan pipe, this is not only very troublesome, but also the outlet and inlet pipes are exposed to the outside, and the airflow will also generate noise, resulting in incomplete noise reduction.

[0005] Therefore, in view of this, the applicant has studied and improved the existing structural deficiencies and proposed a Roots blower with noise reduction and silencing functions to solve the above problems. Utility Model Content

[0006] The utility model aims to provide a Roots blower with noise reduction and silencing functions, and solves the problems raised in the above-mentioned background technology through a spliced ​​silencer shell design.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a Roots blower with noise reduction and silencing functions, comprising a blower body, an air inlet pipe and an air outlet pipe are installed on the blower body, and flanges are installed on the air inlet pipe and the air outlet pipe, the blower body is fixed to the top of the base, and a sound insulation cover covering the blower body is arranged on the top of the base, the sound insulation cover is a cube structure formed by splicing cover shell one, cover shell two and cover shell three, the cover shell one and cover shell two are fitted with the flange and the air inlet pipe and the air outlet pipe, and a circular opening is provided at the fitting position, a silencer pipe is fixed on the outer wall of the cover shell one and cover shell two on the inner wall of the circular opening, a circle of bolt holes corresponding to the flange are provided on the outer side of the silencer pipe by the cover shell one and the cover shell two, and the cover shell one and the cover shell two are respectively fixed to the flange by inserting bolt rods through the screw holes, and nuts fitting the flange are sleeved on the bolt rods.

[0008] Preferably, one side of the cover shell one and the cover shell two is provided with a convex slider, the bottom surface of the slider is aligned with the bottom surface of the cover shell one and the cover shell two, and the cover shell three is placed from top to bottom to fit with the outer walls of the cover shell one and the cover shell two to form a soundproof cover, and the two sliders are inserted from the bottom end of the slide provided on the side wall of the cover shell three.

[0009] Preferably, a limiting assembly is provided on the top of cover shell one and cover shell two, including a rotating plate rotatably connected to the top of cover shell one and cover shell two, the rotating plate is fitted with the tops of cover shell one, cover shell two and cover shell three, and an insert rod passes through the rotating plate, the insert rod is inserted into the corresponding hole on the top of cover shell three, and a spring is connected to the top of the insert rod and the rotating plate.

[0010] Preferably, the cover shell three is penetrated by a heat dissipation water pipe, and the heat dissipation water pipe is located in a spiral shape in the inner part of the cover shell three, and this part is located above the fan body, and water pipe interfaces are provided at both ends of the heat dissipation water pipe.

[0011] Preferably, the side walls of the cover shell 1 and the cover shell 2 are both provided with sealing rubber pads, the two sealing rubber pads are in contact with each other, and the sealing rubber pads are in contact with the side wall of the cover shell 3.

[0012] Preferably, four right-angle aluminum blocks with an "L" shape in top view are fixed on the top of the base, and the outer walls of the right-angle aluminum blocks fit into the right angles formed by the splicing of cover shells one, two and three.

[0013] Preferably, a flange for docking is also fixed on the outer side of one end of the silencer pipe.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. The utility model designs the sound insulation cover to be an assembled structure formed by splicing cover shell 1, cover shell 2 and cover shell 3. During installation, the cover shell 2 is first fitted with the air outlet pipe and the flange on its end side, and fixed by inserting bolt rods through corresponding bolt holes, and then nuts are screwed on from the inner ends of the bolt rods. Then, the cover shell 1 is fitted with the air outlet pipe and the flange thereof in the same manner, and the side walls of the cover shells 1 and 2 are fitted. Finally, the cover shell 3 is installed from the notch to form the sound insulation cover as a whole. This can well adapt to the installation requirements of the Roots blower shape. At the same time, during operation, the airflow will pass through the silencer, which can further reduce the noise at the air outlet and meet the use requirements.

[0016] 2. In the installation design of the cover shell three of the utility model, it is installed from top to bottom, and fits on both sides of the cover shell one and the cover shell two to form a sound insulation cover as a whole. At the same time, the slider is inserted from the bottom end of the slideway of the cover shell three to enhance the tightness of the connection. Finally, the plug rod is pulled up, and then the rotating plate is rotated to a suitable position above the cover shell three. Finally, the plug rod is loosened and inserted into the corresponding hole on the top of the cover shell three under the action of the spring to fix the cover shell three, thereby making the cover shell three easy to disassemble and assemble, and convenient for subsequent maintenance and processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the utility model;

[0018] Figure 2 It is a schematic diagram of the overall explosion three-dimensional structure of the utility model;

[0019] Figure 3 It is a schematic diagram of the local three-dimensional structure of the utility model Figure 1 ;

[0020] Figure 4 It is a schematic diagram of the local three-dimensional structure of the utility model Figure 2 ;

[0021] Figure 5 This is a schematic cross-sectional structural diagram of a cover shell of the present utility model;

[0022] Figure 6 It is a schematic diagram of the three-dimensional structure of the limiting component of the utility model.

[0023] In the figure: 1. fan body; 11. air outlet pipe; 12. air inlet pipe; 13. flange; 2. base; 21. right-angle aluminum block; 3. sound insulation cover; 31. cover shell 1; 32. cover shell 2; 33. cover shell 3; 34. silencer; 35. heat dissipation water pipe; 36. bolt rod; 38. slider; 39. sealing rubber pad; 4. limit assembly; 41. rotating plate; 42. plug rod; 43. spring. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figure 1-Figure 6 As shown, a Roots blower with noise reduction and silencing function includes a blower body 1, an air inlet pipe 12 and an air outlet pipe 11 are installed on the blower body 1, and a flange 13 is installed on the air inlet pipe 12 and the air outlet pipe 11, the blower body 1 is fixed on the top of a base 2, and a sound insulation cover 3 covering the blower body 1 is arranged on the top of the base 2, and the sound insulation cover 3 is a cube structure formed by splicing a cover shell 1 31, a cover shell 2 32 and a cover shell 3 33, and the cover shell 1 31, the cover shell 2 32 and the flange 13 are fixed on the top of the base 2. The flange 13 and the air inlet pipe 12 and the air outlet pipe 11 are fitted together, and a circular opening is provided at the fitting place. A silencer 34 is fixed to the inner wall of the circular opening on the outer wall of the cover shell 1 31 and the cover shell 2 32. A circle of bolt holes corresponding to the flange 13 are provided on the outer side of the silencer 34 of the cover shell 1 31 and the cover shell 2 32, and the cover shell 1 31 and the cover shell 2 32 are respectively fixed to the flange 13 by inserting bolt rods 36 into the screw holes, and nuts fitting the flange 13 are sleeved on the bolt rods 36.

[0026] As mentioned above, by designing the sound insulation cover 3 into an assembled structure formed by splicing cover shell 1 31, cover shell 2 32 and cover shell 3 33, during installation, first fit the cover shell 2 32 with the air outlet pipe 11 and the flange 13 on its end side, fix it by inserting the bolt rod 36 through the corresponding bolt hole, and then screw on the nut from the inner end of the bolt rod 36, and then fit the cover shell 1 31 with the air outlet pipe 11 and the flange 13 thereof according to the same operation, and at the same time, the side walls of cover shell 1 31 and cover shell 2 32 are fitted, and the bottoms of cover shell 2 32 and cover shell 32 are in contact with the top of the base 2, and finally, the cover shell 33 is installed from the notch to form the sound insulation cover 3 as a whole, which can well adapt to the installation requirements of the Roots blower shape. At the same time, during operation, the airflow will pass through the silencer 34, and then the noise at the air outlet can be further reduced to meet the use requirements.

[0027] A convex slider 38 is provided on one side of the cover shell 1 31 and the cover shell 2 32, and the bottom surface of the slider 38 is aligned with the bottom surface of the cover shell 1 31 and the cover shell 2 32. The cover shell 33 is placed from top to bottom to fit with the outer walls of the cover shell 1 31 and the cover shell 2 32 to form a sound insulation cover 3, and the two sliders 38 are inserted from the bottom end of the slide provided on the side wall of the cover shell 33. A limit assembly 4 is provided on the top of the cover shell 1 31 and the cover shell 2 32, including a rotating plate 41 rotatably connected to the top of the cover shell 1 31 and the cover shell 2 32, the rotating plate 41 is fitted with the cover shell 1 31 and the cover shell 2 32 and the top of the cover shell 3 33, and an insertion rod 42 passes through the rotating plate 41, and the insertion rod 42 is inserted into the corresponding hole in the top of the cover shell 3 33, and a spring 43 is connected to the top of the insertion rod 42 and the rotating plate 41.

[0028] As mentioned above, when in use, only the cover shell 33 needs to be removed to connect the internal lines, or to maintain the motor, and the nuts can be removed. Therefore, in the installation design of the cover shell 33, it is installed from top to bottom and fits on both sides of the cover shell 1 31 and the cover shell 2 32 to form the sound insulation cover 3 as a whole. At the same time, the slider 38 is inserted from the bottom end of the slideway of the cover shell 33 to enhance the connection tightness. Finally, the plug rod 42 is pulled up, and then the rotating plate 41 is rotated, and the rotating plate 41 is rotated to a suitable position above the cover shell 33. Finally, the plug rod 42 is loosened, and the spring 43 is used to insert it into the corresponding hole on the top of the cover shell 33 to fix the cover shell 33, so that the cover shell 33 is easy to disassemble and assemble, and it is convenient for subsequent maintenance. Note that the plug rod 42 is located at the outer end of the cover shell 1 31 and the cover shell 2 32 at the beginning.

[0029] The heat dissipation water pipe 35 passes through the cover shell three 33 , and the heat dissipation water pipe 35 is located in the inner part of the cover shell three 33 and is designed in a spiral shape. This part is located above the fan body 1 , and water pipe interfaces are provided at both ends of the heat dissipation water pipe 35 .

[0030] As mentioned above, by designing the heat dissipation water pipe 35, since the design of the sound insulation cover 3 makes it difficult for the internal temperature to dissipate, during operation, both ends of the heat dissipation water pipe 35 can be connected to a water source. Since hot air will rise, the heat dissipation water pipe 35 is made of metal aluminum and can absorb heat very well. Therefore, it can absorb a large amount of heat and perform efficient heat exchange through water flow, thereby effectively solving the problem that the heat is not easy to dissipate while the sound insulation cover 3 is soundproofing.

[0031] The side walls of both cover shell 1 31 and cover shell 2 32 are provided with sealing rubber pads 39, and the two sealing rubber pads 39 are in contact with each other, and the sealing rubber pads 39 are in contact with the side walls of cover shell 3 33. Four right-angle aluminum blocks 21 with an "L" shape in a top view are fixed on the top of the machine base 2. The outer walls of the right-angle aluminum blocks 21 are fitted at a right angle formed by the splicing of cover shell 1 31, cover shell 2 32 and cover shell 3 33. A flange 13 for docking is also fixed to the outside of one end of the silencer pipe 34.

[0032] As mentioned above, in order to further optimize the performance of the soundproof cover 3, the sealing rubber pad 39 makes the tightness between the cover shell 1 31, the cover shell 2 32 and the cover shell 3 33 better, and the right-angle aluminum block 21 contacts the four corners inside the soundproof cover 3 and strengthens the limit, so that the soundproof cover 3 has better stability. Finally, a flange 13 is also provided at one end of the silencer pipe 34 for easy connection with some pipelines, which is very practical.

[0033] Working principle: During installation, first fit the cover shell 2 32 with the air outlet duct 11 and the flange 13 on its end side, fix it by inserting the bolt rod 36 through the corresponding bolt hole, and finally screw on the nut from the inner end of the bolt rod 36, then follow the same operation to fit the cover shell 1 31 with the air outlet duct 11 and its flange 13, at the same time, fit the side walls of the cover shell 1 31 and the cover shell 2 32, and the bottoms of the cover shell 2 32 and the cover shell 2 32 are in contact with the top of the base 2, finally, fit the cover shell 33 from top to bottom on both sides of the cover shell 1 31 and the cover shell 2 32 to form the sound insulation cover 3 as a whole, and at the same time, insert the slider 38 from the bottom end of the slideway of the cover shell 3 33 to enhance the connection tightness, finally pull up the insertion rod 42, and then rotate the rotating plate 41, and the rotating plate 41 turns to the cover shell 3 33, and finally loosen the insertion rod 42, and insert it into the corresponding hole on the top of the cover shell three 33 under the action of the spring 43 to fix the cover shell three 33. At this time, the right-angle aluminum block 21 contacts the four corners inside the sound insulation cover 3 and strengthens the limit, and the sealing rubber pad 39 enhances the sealing. During operation, it can be connected through the flange at one end of the silencer pipe 34, and the silencer pipe 34 and the sound insulation cover 3 jointly achieve a sound insulation effect. It should be noted that the sound insulation cover 3 is an existing design method, and its inner wall, that is, the inner wall of the three spliced ​​cover shells, can be bonded with sound insulation pads to strengthen the sound insulation, which will not be repeated here. At the same time, the inner diameters of the air inlet pipe 12 and the air outlet pipe 11 of the fan body 1 are the same as the inner diameters of the corresponding circular holes of the cover shell one 31 and the cover shell two 32.

[0034] This is the working principle of this Roots blower with noise reduction and silencing function.

[0035] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A Roots blower with noise reduction and silencing function, comprising a blower body (1), an air inlet pipe (12) and an air outlet pipe (11) being mounted on the blower body (1), and flanges (13) being mounted on the air inlet pipe (12) and the air outlet pipe (11), the blower body (1) being fixed on the top of a machine base (2), and a soundproof cover (3) covering the blower body (1) being arranged on the top of the machine base (2), wherein: The soundproof cover (3) is a cubic structure formed by splicing a cover shell 1 (31), a cover shell 2 (32) and a cover shell 3 (33); The cover shell 1 (31) and the cover shell 2 (32) are fitted with the flange (13) and the air inlet pipe (12) and the air outlet pipe (11), and a circular opening is provided at the fitting position. A silencer pipe (34) is fixed on the inner wall of the circular opening on the outer wall of the cover shell 1 (31) and the cover shell 2 (32). A circle of bolt holes corresponding to the flange (13) are provided on the outer side of the silencer pipe (34) of the cover shell 1 (31) and the cover shell 2 (32). The cover shell 1 (31) and the cover shell 2 (32) are respectively fixed with the flange (13) by inserting bolt rods (36) through the screw holes, and nuts fitting the flange (13) are sleeved on the bolt rods (36).

2. A Roots blower with noise reduction and silencing function according to claim 1, characterized in that: A convex sliding block (38) is provided on one side of the cover shell 1 (31) and the cover shell 2 (32), and the bottom surface of the sliding block (38) is aligned with the bottom surface of the cover shell 1 (31) and the cover shell 2 (32). The cover shell 3 (33) is placed from top to bottom to fit with the outer wall of the cover shell 1 (31) and the cover shell 2 (32) to form a soundproof cover (3), and the two sliding blocks (38) are inserted from the bottom end of the slideway provided on the side wall of the cover shell 3 (33).

3. A Roots blower with noise reduction and silencing function according to claim 2, characterized in that: The tops of the cover shells 1 (31) and 2 (32) are provided with a limiting assembly (4), comprising a rotating plate (41) rotatably connected to the tops of the cover shells 1 (31) and 2 (32), the rotating plate (41) being fitted with the tops of the cover shells 1 (31), 2 (32) and 3 (33), and an insertion rod (42) passing through the rotating plate (41), the insertion rod (42) being inserted into a corresponding hole at the top of the cover shell 3 (33), and a spring (43) being connected between the top of the insertion rod (42) and the rotating plate (41).

4. The Roots blower with noise reduction and silencing function according to claim 1, characterized in that: The cover shell three (33) is penetrated by a heat dissipation water pipe (35), and the heat dissipation water pipe (35) is located in a spiral shape in the inner part of the cover shell three (33), and this part is located above the fan body (1), and water pipe interfaces are provided at both ends of the heat dissipation water pipe (35).

5. The Roots blower with noise reduction and silencing function according to claim 4, characterized in that: The side walls of the cover shell 1 (31) and the cover shell 2 (32) are both provided with sealing rubber pads (39), the two sealing rubber pads (39) are in contact with each other, and the sealing rubber pads (39) are in contact with the side wall of the cover shell 3 (33).

6. The Roots blower with noise reduction and silencing function according to claim 1, characterized in that: Four right-angle aluminum blocks (21) having an "L" shape when viewed from above are fixed on the top of the machine base (2), and the outer walls of the right-angle aluminum blocks (21) fit in a right angle formed by splicing the cover shell 1 (31), the cover shell 2 (32) and the cover shell 3 (33).

7. The Roots blower with noise reduction and silencing function according to claim 1, characterized in that: A flange plate (13) for docking is also fixed on the outer side of one end of the muffler pipe (34).

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