Silencing and noise reduction structure of fire-fighting high-temperature-resistant mixed-flow fan

Abstract

The utility model discloses a fire-fighting high-temperature-resistant mixed-flow fan noise reduction structure which comprises a cylindrical machine shell, a motor frame is fixed on the inner side wall of the machine shell, a driving motor is fixed on the motor frame, a driving impeller is fixed on an output shaft of the driving motor, a flange edge extending in the radial direction is formed on the outer side wall of the left end of the machine shell, and the outer side wall of the right end of the machine shell is provided with an impeller. The outer side wall of the machine shell is sleeved with an outer sleeve in an inserted mode, the left end of the outer sleeve is fixedly connected to the outer side wall of the left portion of the machine shell through a bolt or a rivet, the right end of the outer sleeve is fixedly connected to the outer side wall of the right portion of the machine shell through a bolt or a rivet, and the right end of the outer sleeve is provided with a right flange edge extending outwards in the radial direction; the outer sleeve is directly inserted in the outer side wall of the machine shell in a sleeved mode and is fixed through bolts or rivets, and therefore installation is easy, efficiency is high, and the effect is good.

Description

Technical field:

[0001] The utility model relates to the technical field of fan equipment, and more specifically to a silencing and noise reduction structure of a fire-fighting high-temperature resistant mixed flow fan. Background technology:

[0002] Mixed flow fan is a fan between axial flow fan and centrifugal fan. The impeller of mixed flow fan makes the air do both centrifugal motion and axial motion. The movement of air in the shell is a mixture of axial flow and centrifugal motion, so it is called "mixed flow".

[0003] Existing mixed flow fans for fire fighting are generally composed of a motor seat welded and fixed in a cylindrical fan casing, a drive motor fixed on the motor seat, and an impeller fixed on the drive motor. They generally do not have a silencer structure. In order to achieve the effect of silencing and reducing noise, silencers are generally connected to the air inlet and outlet of the fan for silencing. However, the wind tube of the fan actually also has a large noise. Therefore, a silencer structure can be set at the wind tube. The existing method is to weld an outer cylinder body on the outer side wall of the wind tube, and clamp a sound-absorbing cotton and other structures between the outer cylinder body and the wind tube. The welded outer cylinder body is troublesome to process and the effect is poor. In addition, the welding of the outer cylinder body is troublesome, the manufacturing process is troublesome, and the manufacturing efficiency is low. Utility model content:

[0004] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a silencing and noise reduction structure for a fire-fighting high-temperature resistant mixed flow fan. Its outer sleeve is directly inserted into the outer side wall of the casing and fixed by bolts or rivets. Its installation is simple, and its manufacturing efficiency is high and the manufacturing effect is good.

[0005] The solution of the utility model to solve the technical problem is:

[0006] A noise reduction structure for a fire-fighting high-temperature resistant mixed flow fan, comprising a cylindrical casing, a motor frame fixed on the inner side wall of the casing, a driving motor fixed on the motor frame, a driving impeller fixed on the output shaft of the driving motor, a radially extending flange edge formed on the outer side wall of the left end of the casing, an outer sleeve inserted on the outer side wall of the casing, the left end of the outer sleeve is fixedly connected to the outer side wall of the left part of the casing by bolts or rivets, the right end of the outer sleeve is fixedly connected to the outer side wall of the right part of the casing by bolts or rivets, and a right flange edge extending radially outward is provided on the right end of the outer sleeve;

[0007] An inner cavity is formed between the outer sleeve and the outer side wall of the casing, and the inner cavity is filled with sound-absorbing cotton. A plurality of through holes are formed on the side plate of the casing, and the through holes are communicated with the inner cavity.

[0008] The outer sleeve comprises an annular shell, a left annular sleeve portion extending to the left is formed on the left end surface of the left end plate of the annular shell near the outer side wall of the casing, a right annular sleeve portion extending to the right is formed on the right end surface of the right end plate of the annular shell near the outer side wall of the casing, and a right flange is formed on the outer side wall of the right end of the right annular sleeve portion;

[0009] An annular groove is formed on the inner side wall of the left annular sleeve and the right annular sleeve, and the sealing ring is nested in the annular groove, and the inner wall surface of the sealing ring is pressed against the outer side wall of the casing.

[0010] The outstanding effects of the utility model are:

[0011] Its outer sleeve is directly inserted and sleeved on the outer side wall of the casing and fixed by bolts or rivets. Its installation is simple, that is, its manufacturing is simple, so that its manufacturing efficiency is high and the effect is good. Description of the drawings:

[0012] Figure 1 It is a partial structural schematic diagram of the utility model;

[0013] Figure 2 It is a partial cross-sectional view of the utility model;

[0014] Figure 3 yes Figure 1 A partial enlarged view of . Specific implementation method:

[0015] For example, see Figures 1 to 3 As shown, a noise reduction structure of a fire-fighting high-temperature resistant mixed flow fan comprises a cylindrical casing 10, a motor frame 11 is fixed on the inner side wall of the casing 10, a driving motor 12 is fixed on the motor frame 11, a driving impeller 13 is fixed on the output shaft of the driving motor 12, a radially extending flange 14 is formed on the outer side wall of the left end of the casing 10, and an outer sleeve 20 is inserted on the outer side wall of the casing 10;

[0016] An inner cavity is formed between the outer sleeve 20 and the outer side wall of the casing 10, and the inner cavity is filled with sound-absorbing cotton 1. A plurality of through holes 15 are formed on the side plate of the casing 10, and the through holes 15 are communicated with the inner cavity.

[0017] Further, the outer sleeve 20 includes an annular shell 22, and a left annular sleeve portion 23 extending to the left is formed on the left end surface of the left end plate of the annular shell 22 (the outer wall of the left end plate is welded and fixed to the inner wall of the left end of the outer annular wall plate of the annular shell 22) near the outer wall of the casing 10, and a right annular sleeve portion 24 extending to the right is formed on the right end surface of the right end plate of the annular shell 22 (the outer wall of the right end plate is welded and fixed to the inner wall of the right end of the outer annular wall plate of the annular shell 22) near the outer wall of the casing 10, and a right flange 21 is formed on the outer wall of the right end of the right annular sleeve portion 24;

[0018] A plurality of connecting through holes 100 are formed on the flange edge 14 and the right flange edge 21 .

[0019] The left annular sleeve 23 and the right annular sleeve 24 are both fixedly connected to the side panels of the casing 10 by a plurality of bolts or rivets (only the bolt fixing method is shown in the drawings, and since the bolt or rivet fixing is a conventional method, the rivet fixing is not shown).

[0020] The inner side walls of the left annular sleeve 23 and the right annular sleeve 24 are in close contact with the outer side wall of the housing 10 .

[0021] Annular grooves are formed on the inner side walls of the left annular sleeve 23 and the right annular sleeve 24 . The sealing ring 2 is nested in the annular grooves, and the inner wall surface of the sealing ring 2 is pressed against the outer side wall of the casing 10 .

[0022] The above structure allows that, during the processing, the outer sleeve 20 only needs to be sleeved on the outer side wall of the casing 10, the interior of the outer sleeve 20 is first filled with the sound-absorbing cotton 1 (the sound-absorbing cotton 1 can be made of glass fiber sound-absorbing cotton, or other sound-absorbing materials such as felt, etc.), the left end surface of the left annular sleeve 23 is pressed against the right end surface of the flange edge 14, and then the left annular sleeve 23 and the right annular sleeve 24 are fixedly connected to the side plate of the casing 10 by multiple bolts or rivets to achieve installation;

[0023] A plurality of connecting through holes 100 are formed on the flange edge 14 and the right flange edge 21, and the positions of the connecting through holes 100 are exactly staggered with the positions of the bolts or rivets that fix the left annular sleeve 23 and the right annular sleeve 24 to the casing 10, so as to ensure that the bolts connecting the flange edge 14 and the right flange edge 21 to the connecting flange of the connecting pipeline can be fixed through the corresponding connecting through holes 100, so that they will not interfere with the bolts or rivets connecting the left annular sleeve 23 and the right annular sleeve 24 to the casing 10, thereby ensuring normal operation.

[0024] Furthermore, a plurality of annular support rings 3 are formed on the inner side wall of the outer annular wall plate of the annular shell 22 , and the inner side wall of the annular support ring 3 is close to the outer side wall of the housing 10 .

[0025] Lower supporting connecting feet 4 are fixed to the left and right parts of the bottom surface of the annular shell 22 .

[0026] All of its annular support rings 3 can improve the supporting force of the annular shell 22, ensuring that when the lower supporting connecting foot 4 is fixed to the base below, the annular shell 22 is not easily deformed through the support of the annular support ring 3, ensuring the normal installation and use of the equipment.

Claims

1. A noise reduction structure for a fire-fighting high-temperature resistant mixed flow fan, comprising a cylindrical casing (10), a motor frame (11) fixed on the inner side wall of the casing (10), a driving motor (12) fixed on the motor frame (11), and a driving impeller (13) fixed on the output shaft of the driving motor (12), characterized in that: A radially extending flange (14) is formed on the outer wall of the left end of the casing (10); an outer sleeve (20) is inserted on the outer wall of the casing (10); the left end of the outer sleeve (20) is fixedly connected to the left outer wall of the casing (10) by bolts or rivets; the right end of the outer sleeve (20) is fixedly connected to the right outer wall of the casing (10) by bolts or rivets; and the right end of the outer sleeve (20) is provided with a right flange (21) extending radially outward; An inner cavity is formed between the outer sleeve (20) and the outer wall of the casing (10), and the inner cavity is filled with sound-absorbing cotton (1). A plurality of through holes (15) are formed on the side plate of the casing (10), and the through holes (15) are in communication with the inner cavity.

2. The silencing and noise reduction structure of a fire-fighting high-temperature resistant mixed flow fan according to claim 1 is characterized in that: The outer sleeve (20) comprises an annular shell (22), a left annular sleeve portion (23) extending leftward is formed on the left end surface of the left end plate of the annular shell (22) near the outer side wall of the casing (10), a right annular sleeve portion (24) extending rightward is formed on the right end surface of the right end plate of the annular shell (22) near the outer side wall of the casing (10), and a right flange edge (21) is formed on the outer side wall of the right end of the right annular sleeve portion (24); A plurality of connecting through holes (100) are formed on the flange edge (14) and the right flange edge (21).

3. The silencing and noise reduction structure of a fire-fighting high-temperature resistant mixed flow fan according to claim 2 is characterized in that: The left annular sleeve (23) and the right annular sleeve (24) are both fixedly connected to the side plate of the casing (10) by a plurality of bolts or rivets.

4. The silencing and noise reduction structure of a fire-fighting high-temperature resistant mixed flow fan according to claim 2 is characterized in that: The inner side walls of the left annular sleeve (23) and the right annular sleeve (24) are in close contact with the outer side wall of the casing (10).

5. The silencing and noise reduction structure of a fire-fighting high-temperature resistant mixed flow fan according to claim 2 is characterized in that: Annular grooves are formed on the inner side walls of the left annular sleeve (23) and the right annular sleeve (24), the sealing ring (2) is nested in the annular grooves, and the inner wall surface of the sealing ring (2) is pressed against the outer side wall of the casing (10).

6. The silencing and noise reduction structure of a fire-fighting high-temperature resistant mixed flow fan according to claim 2 is characterized in that: A plurality of annular support rings (3) are formed on the inner side wall of the outer annular wall plate of the annular shell (22), and the inner side wall of the annular support ring (3) is close to the outer side wall of the casing (10).

7. The silencing and noise reduction structure of a fire-fighting high-temperature resistant mixed flow fan according to claim 2 is characterized in that: Lower supporting connecting feet (4) are fixed to the left and right parts of the bottom surface of the annular shell (22).

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