CN218207124U

CN218207124U - Low-noise high-temperature-resistant centrifugal fan

Info

Publication number: CN218207124U
Application number: CN202222197539.3U
Authority: CN
Inventors: 余通; 汪述辉; 覃亚; 夏国志
Original assignee: Wuhan Changjiang Blower Manufacturing Co ltd
Current assignee: Wuhan Changjiang Blower Manufacturing Co ltd
Priority date: 2022-08-19
Filing date: 2022-08-19
Publication date: 2023-01-03
Anticipated expiration: 2032-08-19

Abstract

The application relates to the technical field of fans, and particularly discloses a low-noise high-temperature-resistant centrifugal fan which comprises a box body for covering an impeller and a motor, wherein a plurality of sound-absorbing boards are detachably arranged on the inner wall of the box body; and the limiting block is provided with a fixing piece for fixing the position of the sound absorption plate. The application has the effect of reducing noise pollution.

Description

Low-noise high-temperature-resistant centrifugal fan

Technical Field

The application relates to the technical field of fans, in particular to a low-noise high-temperature-resistant centrifugal fan.

Background

The centrifugal fan depends on input mechanical energy, the centrifugal fan utilizes an impeller rotating at high speed to accelerate, decelerate and change the flow direction of gas so as to convert kinetic energy into potential energy, and the impeller of the centrifugal fan generally consists of a plurality of blades with the same size and shape.

Chinese patent with application number CN211174699U in the related art, a centrifugal ventilator is proposed, including a fan base, a motor support arranged on the upper end of the fan base is provided, a motor is arranged on the upper end of the motor support, a motor output end is provided with a motor belt pulley, the centrifugal ventilator further comprises a box body frame arranged on the fan base, an inner side of the box body frame is provided with a rotation shaft, the outer side of the box body frame is provided with a shell, one end of the rotation shaft, which is located on the outer side of the shell, is provided with a fan belt pulley, a conveying belt is installed on the outer sides of the motor belt pulley and the fan belt pulley, the front end of the shell is provided with an air outlet flange, the rear end of the shell is provided with an air inlet flange, a wheel disc is arranged on the rotation shaft, and blades are arranged on the wheel disc. The blade is convenient to maintain and replace through riveting of the blade and the wheel disc, and the use cost is reduced.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: during the use, thereby the air current between motor and the impeller all can vibrate and produce great noise, has noise pollution, can cause the influence to the user.

SUMMERY OF THE UTILITY MODEL

In order to improve the problem that produces noise pollution when centrifugal fan uses, this application provides a high temperature resistant centrifugal fan of low noise.

The application provides a low noise high temperature resistant centrifugal fan adopts following technical scheme:

a low-noise high-temperature-resistant centrifugal fan comprises a box body used for covering an impeller and a motor, wherein a plurality of sound-absorbing boards are detachably arranged on the inner wall of the box body; and the limiting block is provided with a fixing piece for fixing the position of the sound-absorbing board.

By adopting the technical scheme, the motor drives the impeller to rotate, and the limiting block is inserted and matched with the mounting hole in the outer frame of the sound-absorbing board, so that the sound-absorbing board is limited from moving in the vertical direction; the fixing piece is used for further limiting the horizontal movement of the sound-absorbing board, so that the sound-absorbing board is stably arranged on the inner wall of the box body; the problem of noise pollution caused by mechanical vibration noise and airflow noise when the centrifugal fan is used is solved.

Optionally, the fixing element is a rotary block rotatably connected to the limiting block, and the rotary block is rotatably connected to the limiting block through the rotating element; the rotary block penetrates out of the mounting hole to reach the other side of the sound-absorbing board, and the rotary block rotates to a position deviating from the length direction of the mounting hole; the limiting block is provided with a rotating assembly for realizing the rotation connection of the rotary block and the limiting block, and the rotary block is provided with a locking piece for locking the rotation angle of the rotary block.

By adopting the technical scheme, the limiting block moves along the horizontal direction and is inserted into the mounting hole, and the inner wall of the mounting hole is abutted with the outer side wall of the limiting block, so that the sound-absorbing board is limited to move along the vertical direction; one end of the rotary block penetrates through the mounting hole and then reaches the side wall of the sound-absorbing board far away from the box body, and the rotary block can be attached to the side wall and rotate to the length direction deviated from the mounting hole; the rotating block limits the sound-absorbing plate to slide out of the limiting block along the horizontal direction, and the connection stability of the sound-absorbing plate and the inner wall of the box body is ensured; the locking member restricts the rotational direction of the rotary block so that the rotary block maintains the abutting action with the wall surface of the sound-absorbing panel.

Optionally, the locking member is a pull rod, and a through hole in sliding fit with the pull rod is formed in the rotary block; the outer frame of the sound-absorbing board is provided with an insertion hole which is inserted and matched with the pull rod, and the pull rod penetrates out of the through hole to one end of the pull rod to be inserted into the insertion hole; the pull rod is provided with an elastic piece for driving the pull rod to be inserted into the jack.

By adopting the technical scheme, one end of the pull rod slides to penetrate through the through hole and then is inserted into the jack, the inner wall of the jack is continuously abutted against the outer side wall of the pull rod, and the jack limits the movement of the pull rod along the vertical direction; the rotating angle of the rotary block is fixed; the rotating block is limited to rotate, so that the side wall of the sound-absorbing board is stably abutted against the side wall of the rotating block.

Optionally, the elastic member is a spring, a handle is fixedly connected to the end of the pull rod, and two ends of the spring are fixedly connected to the handle and the side wall of the limit block.

By adopting the technical scheme, the handle can improve the pulling convenience of the pull rod, and meanwhile, a foundation is provided for the installation of the spring; when the handle and the pull rod are pulled towards one side far away from the rotary block, the spring is pressed; when the rotary block is rotated to the position of the end part of the pull rod, which corresponds to the jack, the pull rod is released; at the moment, under the elastic action of the spring, the spring drives the pull rod to move until the end part of the pull rod is inserted into the jack.

Optionally, the rotating assembly comprises a round rod and a limiting disc fixedly connected to one end of the round rod, and the other end of the round rod is fixedly connected to the limiting block; a circular groove for accommodating the circular rod and a limiting groove for accommodating the limiting disc are formed in the rotary block; the round bar can rotate in the round groove, and the limiting disc can rotate in the limiting groove.

By adopting the technical scheme, the round rod realizes the rotation of the rotary block on the limiting block, and the round groove provides an installation space of the round rod in the rotary block; the outer side wall of the limiting disc is abutted against the side wall of the limiting groove, so that the round rod cannot be separated from the rotating block; thereby realizing the rotary installation of the rotary block on the limiting block.

Optionally, the outer frame back of the sound-absorbing board is fixedly connected with a rubber ring corresponding to the peripheral side of the limiting block.

By adopting the technical scheme, when the sound-absorbing board is installed, the outer frame of the sound-absorbing board is abutted against the inner wall of the box body, so that the rubber ring is extruded to deform, and a gap between the rear side of the outer frame of the sound-absorbing board and the limiting block is further filled by the rubber ring; meanwhile, the rubber ring increases the friction force between the outer frame of the sound-absorbing board and the inner wall of the box body, so that the sound-absorbing board and the box body are connected more stably.

Optionally, the fan air outlet is in threaded connection with a silencing pipe.

By adopting the technical scheme, the noise generated by the air flow at the air outlet is further absorbed by the silencing pipe, so that the noise pollution is weakened.

Optionally, the periphery of the impeller is sleeved with a silencing cover, the bottom wall of the box body is fixedly connected with a support, and the other end of the support is fixedly connected with the silencing cover.

By adopting the technical scheme, the support stably installs the silencing cover on the bottom wall of the box body; the noise reduction cover reduces noise generated by air flowing between the blades while realizing wind direction flow guiding.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the motor drives the impeller to rotate, and the limiting block is inserted and matched with the mounting hole in the outer frame of the sound-absorbing board, so that the sound-absorbing board is limited from moving in the vertical direction; the fixing piece is used for further limiting the horizontal movement of the sound-absorbing plate, so that the sound-absorbing plate is stably arranged on the inner wall of the box body; the problem of noise pollution caused by mechanical vibration noise and airflow noise when the centrifugal fan is used is solved;

2. the noise generated by the air flow at the air outlet is further absorbed by the silencing pipe, so that the noise pollution is weakened;

3. the rubber ring further fills up the gap between abatvoix frame rear side and the stopper, and the rubber ring increases the frictional force between abatvoix frame and the box inner wall for both connect more firmly.

Drawings

Fig. 1 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 2 isbase:Sub>A schematic sectional view of the structure taken along the linebase:Sub>A-base:Sub>A in fig. 1.

Fig. 3 is a sectional view of the muffler pipe and the muffler cover in the embodiment of the present application.

Fig. 4 is a schematic view of the installation structure of the sound-absorbing panel at the air outlet in the embodiment of the present application.

Fig. 5 is an enlarged schematic view of portion B of fig. 4. Reference numerals: 1. a box body; 11. an air inlet; 12. an air outlet; 121. an air outlet pipe; 2. a wheel disc; 20. an impeller; 21. a motor; 210. a belt; 211. an electric pulley; 212. a fan pulley; 22. a blade; 23. a rotating shaft; 3. a limiting block; 4. a sound-absorbing panel; 40. an outer frame; 401. a jack; 402. mounting holes; 41. a hemispherical groove; 42. a rubber ring; 5. a sound-deadening tube; 6. a sound deadening hood; 61. a support; 7. rotating the block; 71. a circular groove; 72. a limiting groove; 73. a through hole; 8. a round bar; 81. a limiting disc; 9. a pull rod; 91. a handle; 92. a spring.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses high temperature resistant centrifugal fan of low noise. Referring to fig. 1 and 2, the high-strength box-type centrifugal fan comprises a box body 1, an air inlet 11 and an air outlet 12 are formed in the side wall of the box body 1, a motor 21 for providing rotating power for the fan is fixedly connected in the box body 1, and an impeller 20 is rotatably connected to the output end of the motor 21; wherein, the output end of the motor 21 is provided with a motor pulley 211, one end of the impeller 20 is fixedly connected with a rotating shaft 23, and the end part of the rotating shaft 23 is fixedly connected with a fan pulley 212; a belt 210 is installed outside the motor pulley 211 and the fan pulley 212, and the belt 210 transmits power of the motor 21 to rotate the rotating shaft 23 and the upper impeller 20.

Referring to fig. 2 and 3, the impeller 20 has blades 22 riveted thereon; the outer peripheral wall of the rotating shaft 23 is fixedly connected with a wheel disc 2 for fixing the impeller 20, and the wheel disc 2 is provided with a fixing rod for installing the wheel disc 2 and the blades 22 on the inner wall of the box body 1; an air outlet pipe 121 is arranged on the wheel disc 2 near the air outlet 12.

Referring to fig. 4 and 5, a plurality of limiting blocks 3 are integrally formed on the inner wall of the box body 1, and the limiting blocks 3 are in a strip shape; the inner wall of the box body 1 is connected with a sound-absorbing board 4, wherein the sound-absorbing board 4 is preferably made of polyester fiber board and has high temperature resistance and fireproof performance; the periphery of the sound-absorbing plate 4 is sleeved with an outer frame 40, one side of the sound-absorbing plate 4, which is close to the inner cavity of the box body 1, is provided with a plurality of hemispherical grooves 41 which are mutually communicated through holes, sound waves can penetrate into the sound-absorbing plate 4 along the hemispherical grooves 41 and the holes, and the sound waves and the sound-absorbing plate 4 generate friction action to convert sound energy into heat energy and are absorbed.

Referring to fig. 3 and 5, in order to fix the sound-absorbing board 4, the outer frame 40 is provided with a mounting hole 402 adapted to be inserted into the limiting block 3, and the limiting block 3 is provided with a fixing member for fixing the position of the sound-absorbing board 4. The limiting block 3 is inserted and matched with the mounting hole 402 on the outer frame 40 of the sound-absorbing board 4, so that the sound-absorbing board 4 is limited from moving in the vertical direction; the horizontal movement of the sound-absorbing plate 4 is further limited by the fixing piece, so that the sound-absorbing plate 4 is stably arranged on the inner wall of the box body 1.

In addition, the air outlet 12 of the fan is in threaded connection with a silencing pipe 5; the periphery of the impeller 20 is sleeved with a silencing cover 6, the bottom wall of the box body 1 is fixedly connected with a support 61, and the other end of the support 61 is fixedly connected with the bottom wall of the silencing cover 6. The silencing pipe 5 and the silencing cover 6 are arranged, so that noise generated by airflow at the rotating position and the air outlet position of the blade 22 is further absorbed, and the noise transmission is weakened.

In this embodiment, referring to fig. 5, the fixing member is configured to be rotatably connected to the rotating block 7 on one side of the limiting block 3 away from the inner wall of the box body 1, and the vertical cross sections of the rotating block 7, the limiting block 3 and the mounting hole 402 are all strip-shaped with the same shape; the limiting block 3 is provided with a rotating assembly for realizing the rotating connection of the rotary block 7 and the limiting block 3, the rotating assembly in the embodiment comprises a round rod 8 and a limiting disc 81 fixedly connected to one end of the round rod 8, the other end of the round rod 8 is fixedly connected with the limiting block 3, and a round groove 71 matched with the round rod 8 in a sliding manner and a limiting groove 72 for accommodating the limiting disc 81 are formed in the rotary block 7; the round groove 71 provides an installation space for the round rod 8, the round rod 8 can rotate in the round groove 71, and meanwhile, the limiting disc 81 can rotate in the limiting groove 72; the outer side wall of the limiting disc 81 is abutted against the side wall of the limiting groove 72, so that the round rod 8 cannot be separated from the rotary block 7; thereby realizing the rotary installation of the rotary block 7 on the limiting block 3.

When the sound-absorbing board 4 is installed, the rotary block 7 is rotated to the shape and the position corresponding to the limiting block 3, then the rotary block 7 and the limiting block 3 are aligned to the installation hole 402 on the sound-absorbing board 4, the sound-absorbing board 4 is sleeved on the limiting block 3, the rotary block 7 penetrates through the installation hole 402 to reach the other side of the sound-absorbing board 4, and the rotary block 7 is rotated to the position deviating from the length direction of the installation hole 402; at the moment, the inner wall of the mounting hole 402 is abutted against the outer side wall of the limiting block 3, so that the limiting block 3 limits the sound-absorbing board 4 to move along the vertical direction; one end of the rotary block 7 penetrates through the mounting hole 402 and reaches the side wall of the sound-absorbing board 4 far away from the box body 1, and the rotary block can rotate to deviate from the length direction of the mounting hole 402 by being attached to the side wall; therefore, the rotating block 7 limits the sound-absorbing plate 4 to slide out from the limiting block 3 along the horizontal direction, and the connection stability of the sound-absorbing plate 4 and the inner wall of the box body 1 is ensured.

Referring to fig. 5, in order to maintain the abutting action of the rotary block 7 against the wall surface of the first connecting piece and improve the connection stability between the sound-absorbing plate 4 and the inner wall of the box body 1, a locking piece for locking the rotation angle of the rotary block 7 is arranged on the rotary block 7, and the locking piece is a pull rod 9; in order to install the pull rod 9 and realize the automatic insertion effect of the pull rod 9, the rotary block 7 is provided with a through hole 73 matched with the pull rod 9 in a sliding way; the outer frame 40 of the sound-absorbing board 4 is provided with a jack 401 which is in plug-in fit with the pull rod 9, and the pull rod 9 is provided with an elastic piece which drives the pull rod 9 to be inserted into the jack 401; the elastic element is set as a spring 92, the end of the pull rod 9 is fixedly connected with a handle 91, and two ends of the spring 92 are fixedly connected with the handle 91 and the side wall of the rotary block 7 far away from the limit block 3.

When the handle 91 and the pull rod 9 are pulled to the side far away from the rotary block 7, the spring 92 is pressed; when the rotary block 7 is rotated until the end position of the pull rod 9 corresponds to the insertion hole 401, the pull rod 9 is released; at this time, under the elastic action of the spring 92, the spring 92 drives the pull rod 9 to move, and the pull rod 9 slides in the through hole 73 and has one end inserted into the insertion hole 401. The peripheral wall of the inserted bar is abutted with the inner wall of the insertion hole 401, so that the inserted bar limits the rotation direction of the rotary block 7, the rotary block 7 maintains the abutting action with the wall surface of the first connecting piece, and the mounting stability of the silencing plate is ensured.

Referring to fig. 5, after the sound-absorbing board 4 is installed, in consideration of the problem that noise is easy to spread when a centrifugal fan is used and a gap exists between the outer frame 40 of the sound-absorbing board 4 and the inner wall of the box body 1, a rubber ring 42 is fixedly connected to the back surface of the outer frame 40 of the sound-absorbing board 4 corresponding to the circumferential side of the limiting block 3; when installing abatvoix 4, earlier make rubber circle 42 receive the extrusion to produce deformation through abatvoix 4

frame

40 and 1 inner wall looks butt of box to rubber circle 42 further fills up the gap between abatvoix 4 frame 40 rear side and stopper 3, thereby rubber circle 42 increases the frictional force between the frame 40 of abatvoix 4 and the stopper 3, improves the stability of connecting between the two, thereby has avoided abatvoix 4 because of having the rocking problem that the gap takes place with the 1 inner wall of box.

The implementation principle of the low-noise high-temperature-resistant centrifugal fan in the embodiment of the application is as follows: starting the motor 21, wherein the motor 21 drives the rotating shaft 23 to rotate, the rotating shaft 23 drives the wheel disc 2 and the blades 22 thereon to rotate, and negative pressure is generated around the blades 22, so that gas is sucked from the air inlet 11 and discharged from the air outlet pipe 121; the periphery of the sound-absorbing board 4 is sleeved with an outer frame 40, the sound-absorbing board 4 is fixed on the inner wall of the box body 1 through a limiting block 3 on the inner wall of the box body 1 matched with a rotary block 7 and a pull rod 9, and the sound-absorbing board 4 is made of polyester fibers and has certain high-temperature resistance; the silencing pipe 5 is connected with the screw thread, and the silencing cover 6 is sleeved on the periphery of the impeller 20; the noise generated by the airflow at the rotating position and the air outlet position of the blade 22 is further absorbed, so that the noise transmission is weakened, and the problem that the noise pollution is caused and the influence is caused to a user when the centrifugal fan is used is solved.

The above are preferred embodiments of the present application, and the scope of protection of the present application is not limited thereto, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a high temperature resistant centrifugal fan of low noise, establishes box (1) of impeller (20) and motor (21) including being used for the cover, its characterized in that: the sound-absorbing board box is characterized in that a plurality of sound-absorbing boards (4) are detachably arranged on the inner wall of the box body (1), a plurality of limiting blocks (3) are integrally formed on the inner wall of the box body (1), and a plurality of mounting holes (402) which are in plug-in fit with the limiting blocks (3) are formed in an outer frame (40) of each sound-absorbing board (4); and the limiting block (3) is provided with a fixing piece for fixing the position of the sound-absorbing board (4).

2. The low-noise high-temperature-resistant centrifugal fan according to claim 1, characterized in that: the fixing piece is a rotary block (7) which is rotatably connected with the limiting block (3); the rotary block (7) penetrates through the mounting hole (402) to reach the other side of the sound-absorbing plate (4), and the rotary block (7) rotates to a position deviated from the length direction of the mounting hole (402); the limiting block (3) is provided with a rotating assembly for realizing the rotation of the rotary block (7) and the limiting block (3), and the rotary block (7) is provided with a locking piece for locking the rotation angle of the rotary block (7).

3. The low-noise high-temperature-resistant centrifugal fan according to claim 2, characterized in that: the locking piece is arranged as a pull rod (9), and a through hole (73) which is matched with the pull rod (9) in a sliding way is formed in the rotary block (7); an outer frame (40) of the sound-absorbing board (4) is provided with a jack (401) which is in plug-in fit with the pull rod (9), and the pull rod (9) penetrates through the through hole (73) and one end of the pull rod is inserted into the jack (401); the pull rod (9) is provided with an elastic piece for driving the pull rod (9) to be inserted into the insertion hole (401).

4. The low-noise high-temperature-resistant centrifugal fan according to claim 3, characterized in that: the elastic piece is arranged as a spring (92), a handle (91) is fixedly connected to the end of the pull rod (9), and two ends of the spring (92) are respectively fixedly connected with the handle (91) and the side wall of the limiting block (3) away from the rotary block (7).

5. The low-noise high-temperature-resistant centrifugal fan according to claim 2, characterized in that: the rotating assembly is provided with a round rod (8) and a limiting disc (81) fixedly connected to one end of the round rod (8), and the other end of the round rod (8) is fixedly connected with the limiting block (3); a round groove (71) for accommodating the round rod (8) and a limiting groove (72) for accommodating the limiting disc (81) are formed in the rotary block (7); the round rod (8) can rotate in the round groove (71), and the limiting disc (81) can rotate in the limiting groove (72).

6. The low-noise high-temperature-resistant centrifugal fan according to claim 1, characterized in that: and rubber rings (42) are fixedly connected to the back surface of the outer frame (40) of the sound-absorbing board (4) corresponding to the peripheral sides of the limiting blocks (3).

7. The low-noise high-temperature-resistant centrifugal fan according to claim 1, characterized in that: an air outlet (12) is formed in the side wall of the box body (1), and the air outlet (12) is in threaded connection with a silencing pipe (5).

8. The low-noise high-temperature-resistant centrifugal fan according to claim 1, characterized in that: the impeller (20) periphery cover is equipped with amortization cover (6), box (1) diapire rigid coupling has support (61), the support (61) other end with amortization cover (6) rigid coupling.