Noise reduction structure of variable diameter volute casing for Roots-type steam compressor

Abstract

This utility model discloses a noise reduction structure for a variable-diameter volute casing of a Roots-type steam compressor, specifically relating to the field of Roots-type steam engine technology. The noise reduction groove contains multiple baffles arranged in a circular array, each baffle having multiple sound-absorbing holes arranged in a linear array. An arc-shaped plate is also provided on the baffle, with a predetermined gap between the arc-shaped plate and the baffles to form a sound-absorbing groove. The noise reduction structure for the variable-diameter volute casing of the Roots-type steam compressor provided by this utility model achieves this through a cover on the casing, isolating the noise of the Roots-type compressor within the casing. The volute casing on the cover allows noise to enter and be reduced within the volute casing. The noise reduction groove and the multiple baffles within it achieve multiple absorption processes to reduce volume. The arc-shaped plate on the baffle and the sound-absorbing groove formed between the arc-shaped plate and the baffle allow sound to enter the baffles, enter the multiple sound-absorbing holes, and be absorbed within the sound-absorbing groove.

Description

Technical Field

[0001] This utility model relates to the field of Roots steam engine technology, and more specifically to a variable diameter volute noise reduction structure for Roots steam compressors. Background Technology

[0002] A Roots-type steam compressor is a volumetric gas transport device that employs a twin-rotor meshing structure.

[0003] According to publication number CN204283891U, publication date: 2015-04-22, a Roots-type steam compressor is disclosed, relating to the field of steam compressor technology. It addresses the problem of fluid leakage in existing steam compressors when there is significant axial movement of the drive shaft, and provides cooling for the mechanical seal to ensure it operates in an optimal environment. In this steam compressor, the push ring end face is always in contact and tightly fitted with the rotating ring end face, while the rotating ring slides relative to the push ring. The mechanical seal employs a structure with a rotating ring between two stationary rings, ensuring that the push ring on the stationary ring is always in close contact with the rotating ring end face, preventing fluid leakage. The use of a retaining buckle and fixing screws prevents relative rotation between the sealing inner sleeve and the drive shaft, ensuring the sealing effect of the sealing ring. A cooling water circulation system is installed on the main body of the steam compressor. Cooling water flowing through the inlet and outlet cools the mechanical seal, providing a favorable environment to prevent fluid leakage.

[0004] As can be seen from the aforementioned patents and prior art, Roots-type steam compressors produce significant noise during operation, and prolonged exposure to this noise can cause considerable harm to the hearing of nearby workers. Utility Model Content

[0005] The purpose of this invention is to provide a variable diameter volute noise reduction structure for a Roots-type steam compressor, thereby reducing noise during operation.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a variable-diameter volute noise reduction structure for a Roots-type steam compressor, comprising a housing, a cover on the housing, a volute shell on the cover, a noise reduction groove on the volute shell, a plurality of partitions arranged in a circumferential array within the noise reduction groove, a plurality of sound-absorbing holes arranged in a linear array on the partitions, an arc-shaped plate on the partitions, a predetermined gap between the arc-shaped plate and the partitions to form a sound-absorbing groove, and the plurality of arc-shaped plates having the same orientation.

[0007] Preferably, a sound-absorbing plate is provided on the inner wall of the noise reduction groove.

[0008] Preferably, the housing includes a first outer shell, on which a second outer shell is disposed, the diameter of the second outer shell being smaller than that of the first outer shell.

[0009] Preferably, a third outer shell is provided on the second outer shell, the diameter of which is smaller than that of the second outer shell.

[0010] Preferably, the first outer shell has a plurality of grooves arranged in a circumferential array, and a slide rod is slidably disposed in the groove.

[0011] Preferably, a connecting ring is provided on one or more of the slide bars.

[0012] Preferably, the sound-absorbing panel is a rubber panel.

[0013] In the above technical solution, the variable diameter volute noise reduction structure of the Roots steam compressor provided by this utility model has the following beneficial effects: the cover on the shell isolates the noise of the Roots compressor inside the shell; the volute on the cover reduces noise after it enters the volute; the noise reduction groove and multiple baffles inside the noise reduction groove reduce the volume through multiple absorptions; and the arc-shaped plate on the baffle and the sound-absorbing groove formed between the arc-shaped plate and the baffle allow the sound to enter the baffle and then enter multiple sound-absorbing holes for absorption within the sound-absorbing groove. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0015] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0016] Figure 2 A schematic diagram of the shell structure provided for an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the partition and the arc-shaped plate provided in the embodiment of this utility model;

[0018] Figure 4 This is an enlarged schematic diagram of part A of the present invention.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Shell; 11. First outer shell; 12. Second outer shell; 13. Third outer shell; 14. Slide groove; 15. Slide rod; 16. Connecting ring; 17. Cover; 18. Groove; 19. Volute shell; 20. Noise reduction groove; 21. Sound absorption panel; 23. Partition; 24. Sound absorption hole; 25. Arc-shaped plate; 26. Sound absorption groove. Detailed Implementation

[0021] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-4 As shown, the variable diameter volute noise reduction structure of the Roots steam compressor includes a housing 1, a cover 17 on the housing 1, a volute 19 on the cover 17, a noise reduction groove 20 on the volute 19, a plurality of partitions 23 arranged in a circumferential array inside the noise reduction groove 20, a plurality of sound-absorbing holes 24 arranged in a linear array on the partitions 23, and an arc-shaped plate 25 on the partitions 23. A predetermined gap is left between the arc-shaped plate 25 and the partitions 23 to form a sound-absorbing groove 26, and the plurality of arc-shaped plates 25 are oriented in the same direction.

[0023] Specifically, during use, the Roots steam compressor is placed inside the housing 1, and then the Roots steam compressor is started. The noise generated after starting will diffuse outward from inside the housing 1 and enter the top cover 17. It will then enter the volute 19 through the slot 18 on the cover 17 and one end of the noise reduction groove 20. It will then come into contact with the partition 23 inside the volute 19 in sequence, enter the multiple sound-absorbing holes 24 on the partition 23, and then enter the sound-absorbing groove 26 between the arc plate 25 and the partition 23. The noise will be absorbed by the sound-absorbing groove 26. At the same time, the excess noise will pass through the arc plate 25 and enter the next partition 23. Finally, a small amount of noise will be discharged to the outside from the other end of the noise reduction groove 20.

[0024] In the above solution, the noise of the Roots compressor inside the housing 1 is isolated by the cover 17 on the housing 1. The volute shell 19 on the cover 17 allows the noise to be reduced after entering the volute shell 19. The noise reduction groove 20 and the multiple partitions 23 in the noise reduction groove 20 reduce the volume of the sound through multiple absorptions. The arc plate 25 on the partition 23 and the sound absorption groove 26 formed between the arc plate 25 and the partition 23 allow the sound to enter the partition 23 and enter the multiple sound absorption holes 24, and be absorbed in the sound absorption groove 26.

[0025] As a further embodiment provided by this utility model, according to Figure 1 and Figure 2 As shown, a sound-absorbing plate 21 is provided on the inner wall of the noise reduction groove 20.

[0026] Specifically, after the noise enters the noise reduction groove 20, it will be absorbed by the sound absorption panel 21.

[0027] As a further embodiment provided by this utility model, according to Figure 2 As shown, the housing 1 includes a first outer shell 11, and a second outer shell 12 is disposed on the first outer shell 11. The diameter of the second outer shell 12 is smaller than that of the first outer shell 11.

[0028] Furthermore, a third outer shell 13 is provided on the second outer shell 12, and the diameter of the third outer shell 13 is smaller than that of the second outer shell 12.

[0029] Furthermore, the first outer shell 11 has multiple grooves 14 arranged in a circular array, and a slide rod 15 is slidably disposed in the groove 14.

[0030] Furthermore, multiple slide bars 15 are provided with connecting rings 16.

[0031] Specifically, the Roots-type steam compressor is placed at the bottom of the first housing 11. Then, the housing 1, consisting of the first housing 11, the second housing 12, and the third housing 13, is fitted onto the Roots-type steam compressor. Then, multiple lifting connecting rings 16 are used to insert multiple sliding rods 15 into the sliding grooves 14 and into the bottom of the first housing 11. It should be noted that the bottom of the first housing 11 and the first housing 11 are separate. However, after the multiple sliding rods 15 are inserted into the bottom of the first housing 11, the first housing 11 can be fixed on the base at the bottom of the first housing 11. At the same time, the first housing 11, the second housing 12, and the third housing 13 are integrated.

[0032] Working principle: The Roots steam compressor is placed at the bottom of the first housing 11. Then, the housing 1, consisting of the first housing 11, the second housing 12, and the third housing 13, is fitted onto the Roots steam compressor. Multiple lifting connecting rings 16 are then inserted into the sliding grooves 14 and inserted into the bottom of the first housing 11 to fix the housing 1. The Roots steam compressor is then started. The noise generated after starting will diffuse outward from the housing 1 and enter the top cover 17. It will then enter the volute 19 through the slot 18 on the cover 17 and one end of the noise reduction groove 20. It will then come into contact with the partition 23 inside the volute 19 in sequence. After entering the multiple sound-absorbing holes 24 on the partition 23, it will enter the sound-absorbing groove 26 between the arc plate 25 and the partition 23. It will be absorbed by the sound-absorbing groove 26. At the same time, the excess noise will pass through the arc plate 25 and enter the next partition 23. Finally, a small amount of noise will be discharged to the outside from the other end of the noise reduction groove 20.

[0033] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A noise reduction structure for a variable-diameter volute casing of a Roots-type steam compressor, characterized in that, The device includes a housing (1), a cover (17) on the housing (1), a volute shell (19) on the cover (17), a noise reduction groove (20) on the volute shell (19), a plurality of partitions (23) arranged in a circular array in the noise reduction groove (20), a plurality of sound-absorbing holes (24) arranged in a linear array on the partitions (23), an arc plate (25) on the partitions (23), a predetermined gap between the arc plate (25) and the partitions (23) to form a sound-absorbing groove (26), and the plurality of arc plates (25) have the same orientation.

2. The variable diameter volute noise reduction structure of the Roots-type steam compressor according to claim 1, characterized in that, The inner wall of the noise reduction groove (20) is provided with a sound-absorbing plate (21).

3. The variable-diameter volute noise reduction structure of the Roots-type steam compressor according to claim 1, characterized in that, The housing (1) includes a first outer shell (11), and a second outer shell (12) is provided on the first outer shell (11), the diameter of the second outer shell (12) being smaller than that of the first outer shell (11).

4. The variable-diameter volute noise reduction structure of the Roots-type steam compressor according to claim 3, characterized in that, A third outer shell (13) is provided on the second outer shell (12), and the diameter of the third outer shell (13) is smaller than that of the second outer shell (12).

5. The variable-diameter volute noise reduction structure of the Roots-type steam compressor according to claim 3, characterized in that, The first outer shell (11) has a plurality of grooves (14) arranged in a circular array, and a slide rod (15) is slidably disposed in the groove (14).

6. The variable-diameter volute noise reduction structure of the Roots-type steam compressor according to claim 5, characterized in that, A connecting ring (16) is provided on each of the slide rods (15).

7. The variable diameter volute noise reduction structure for a Roots-type steam compressor according to claim 2, characterized in that, The sound-absorbing panel (21) is a rubber panel.

Images