CN217440325U

CN217440325U - Low-noise centrifugal fan

Info

Publication number: CN217440325U
Application number: CN202123327276.5U
Authority: CN
Inventors: 陈文慧; 林勇
Original assignee: Shanghai Muxun Machinery Equipment Co ltd
Current assignee: Shanghai Muxun Machinery Equipment Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-09-16
Anticipated expiration: 2031-12-27

Abstract

The utility model discloses a centrifugal fan of low noise, including casing support group, the right side top fixed mounting of casing support group has the bearing, the bottom fixed mounting of casing support group has the support, the inside fixed mounting of support has damper. The utility model discloses a set up the carriage release lever, earlier make the belt drive the second band pulley rotation through driving motor group drive first band pulley, the second band pulley drives the main shaft and rotates the inside rotation that makes fan body move at the bearing, then casing support group receives the noise transmission that two arouses of shock that fan body drove and gives the support of bottom, make the inside connecting block of support receive the vibrations power and drive the carriage release lever and remove, make movable block compression spring, real-time carriage release lever drives the inside removal of snubber block at the fixed block, the snubber block makes the vibrations power buffering that the carriage release lever removed and brought, and spring shrinkage also cushions the carriage release lever with kick-backing, the shock that makes casing support group obtains buffering, the effect of making an uproar falls in the time of messenger's fan body operation.

Description

Low-noise centrifugal fan

Technical Field

The utility model belongs to the technical field of centrifugal fan, especially, relate to a centrifugal fan of low noise.

Background

The centrifugal fan is a machine for raising gas pressure and discharging gas by means of input mechanical energy, and is a driven fluid machine, and can be extensively used for ventilation, dust-removing and cooling of factory, mine, tunnel, cooling tower, vehicle, ship and building, ventilation and draught of boiler and industrial furnace, cooling and ventilation of air-conditioning equipment and domestic electric equipment, drying and selective-feeding of grain, air-tunnel wind source and air-cushion ship and others, in the single-stage centrifugal fan the gas can be fed into the impeller from axial direction, and the gas can be changed into radial direction when it is passed through the impeller, then fed into diffuser, in the diffuser the gas can change flow direction and the cross-section area of the pipeline can be increased to make the gas flow be decelerated, and said deceleration action can convert kinetic energy into pressure energy, and the centrifugal fan is a kind of flow-changing constant pressure device, and when the rotating speed is fixed, the pressure-flow theoretical curve of the centrifugal fan is a straight line, the actual characteristic curve is curved due to internal losses.

The centrifugal fan in the market is widely applied at present, the centrifugal fan accelerates gas by utilizing an impeller rotating at a high speed according to the principle of converting kinetic energy into potential energy, then decelerates and changes the flow direction to convert the kinetic energy into the potential energy, along with the promotion of the industrial process of China, the industrial industry is developing energy conservation and consumption reduction vigorously to carry out industrial upgrading and integration and recombination, industrial basic equipment needs to be updated in large quantity, the centrifugal fan is used as important industrial matched equipment and is more applied to the fields of electric power, cement, petrochemical industry, coal, mines, environmental protection and the like, but most of the centrifugal fans can generate vibration noise during working, the generation of the noise can influence the physical and mental health of operators, and the operating environment is influenced to a certain extent, and the centrifugal fan with low noise is provided to solve the problems.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a low-noise centrifugal fan, which comprises a movable rod, a first belt wheel is driven by a driving motor group to drive a belt to drive a second belt wheel to rotate, the second belt wheel drives a main shaft to rotate, the main shaft rotates in a bearing to drive a fan body to operate, then the noise caused by the vibration of the fan body is transmitted to the bottom bracket, the connecting block in the bracket is driven by the vibration force to drive the movable rod to move, the movable rod moves to drive the movable block to compress the spring, the real-time movable rod drives the damping block to move in the fixed block, the damping block buffers the vibration force caused by the movement of the movable rod, and spring shrink also cushions the carriage release lever with the resilience, makes the vibration of casing support group obtain the buffering, makes the effect of making an uproar of falling when the fan body moves, and through setting up the supporting leg, the supporting leg makes more stable effect when the fan body moves.

In order to realize the purpose of the above noise reduction, the utility model adopts the following technical scheme:

the utility model provides a centrifugal fan of low noise, includes casing support group, the right side top fixed mounting of casing support group has the bearing, the right side top movable mounting of casing support group have with bearing fixed connection's main shaft, the right side fixed mounting of casing support group has driving motor group, the inside fixed mounting of casing support group has the fan body with bearing fixed connection, the bottom fixed mounting of casing support group has the support, the inside fixed mounting of support has damper.

Preferably, damper includes fixed block, carriage release lever, connecting block, spring and snubber block, the inside fixed mounting of support has the fixed block, the inside movable mounting of fixed block has the carriage release lever, the bottom fixed mounting of casing support group has the connecting block with carriage release lever top fixed connection, the outside of carriage release lever and the inside movable mounting who is located the fixed block have the spring, the bottom fixed mounting of carriage release lever has the snubber block.

Preferably, the fixed block is internally provided with a cavity, and the top of the fixed block is provided with a movable hole matched with the movable rod.

Preferably, the top of the spring is fixedly provided with a moving block fixedly connected with the moving rod, and the length of the moving block is greater than the diameter of the moving hole.

Preferably, a supporting block is fixedly mounted inside the fixed block and at the bottom of the spring, and a moving hole matched with the moving rod is formed inside the supporting block.

Preferably, the bottom of support fixed mounting has the supporting leg, the left side fixed mounting of casing support group has the import dryer, the outside fixed mounting of bearing and main shaft has the protection casing group.

Preferably, a first belt wheel is fixedly mounted on the right side of the driving motor set, a second belt wheel is fixedly mounted on the right side of the main shaft, and a belt wheel protective cover is fixedly mounted outside the first belt wheel and the second belt wheel.

Compared with the prior art, the beneficial effects of the utility model are that:

through setting up the carriage release lever, earlier make the belt drive the rotation of second band pulley through driving motor group drive first band pulley, the second band pulley drives the main shaft and rotates, the main shaft rotates at the inside of bearing and makes the operation of fan body, then casing support group receives the noise transmission that two arouses of shock that fan body drove and gives the support of bottom, make the inside connecting block of support receive the vibrations power and drive the carriage release lever and remove, the carriage release lever removes and drives movable block compression spring, real-time carriage release lever drives the inside removal of snubber block at the fixed block, the snubber block makes the vibrations power buffering that the carriage release lever removed and bring, and spring shrink also cushions the carriage release lever with the resilience, the shock that makes casing support group obtains buffering, make the effect of making an uproar that falls when the fan body moves, through setting up the supporting leg, the more stable effect when the supporting leg makes the fan body move.

Drawings

Fig. 1 is a schematic structural view of a low-noise centrifugal fan according to the present invention;

fig. 2 is a left side view of a low-noise centrifugal fan according to the present invention;

fig. 3 is the utility model provides a centrifugal fan damper schematic diagram of low noise.

In the figure: 1 casing support group, 2 bearings, 3 main shafts, 4 driving motors, 5 fan bodies, 6 supports, 7 supporting legs, 8 inlet wind cylinders, 9 protection cover groups, 10 belt wheel protection covers, 11 damping mechanisms, 1101 fixing blocks, 1102 moving rods, 1103 connecting blocks, 1104 springs and 1105 damping blocks.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1, fig. 2 and fig. 3, a centrifugal fan of low noise, including casing support group 1, the right side top fixed mounting of casing support group 1 has bearing 2, the right side top movable mounting of casing support group 1 has main shaft 3 with bearing 2 fixed connection, the right side fixed mounting of casing support group 1 has driving motor group 4, the inside fixed mounting of casing support group 1 has fan body 5 with bearing 2 fixed connection, the bottom fixed mounting of casing support group 1 has support 6, the inside fixed mounting of support 6 has damper 11.

In fig. 2 and 3, the damping mechanism 11 includes a fixing block 1101, a moving rod 1102, a connecting block 1103, a spring 1104 and a damping block 1105, the connecting block 1103 inside the support 6 receives a vibration force to drive the moving rod 1102 to move, the moving rod 1102 moves to drive the moving block compression spring 1104, the real-time moving rod drives the damping block 1105 to move inside the fixing block 1101, the damping block 1105 buffers the vibration force caused by the movement of the moving rod 1102, and the spring 1104 contracts and rebounds to buffer the moving rod 1102, so that the vibration of the housing support set 1 is buffered, and the fan body 5 performs a noise reduction function when in operation.

In fig. 3, a movable hole is formed at the top of the fixing block 1101 to facilitate the movement of the movable rod 1102 inside the fixing block 1101.

In fig. 2 and 3, the moving block fixedly connected to the top of spring 1104 and moving rod 1102 facilitates movement of moving rod 1102 to drive the moving block to compress spring 1102, and the length of the moving block is greater than the diameter of the moving hole, so that the moving block is prevented from moving out of the fixed block 1101.

In fig. 2 and 3, the supporting block inside the fixing block 1101 and located at the bottom of the spring 1104 facilitates the effect of compressing the spring 1104 by the moving block, and the moving hole formed inside the supporting block facilitates the effect of moving the moving rod 1102.

In fig. 1 and 2, the supporting leg 7 at the bottom of the support 6 makes things convenient for the more stable effect of 5 operation in-process of fan body, and the effect of 5 air intakes of fan body is made things convenient for to the import dryer 8 in casing support group 1 left side, and the outside protection casing group 9 of bearing 2 and main shaft 3 conveniently protects bearing 2 and main shaft 3.

In fig. 1 and 2, a belt wheel protective cover 10 is fixedly mounted outside the first belt wheel on the right side of the driving motor set 4 and the second belt wheel on the right side of the spindle 3, so that the first belt wheel and the second belt wheel can be conveniently protected.

In fig. 1, the outside movable mounting of first band pulley has the belt with second band pulley swing joint, makes things convenient for driving motor group 4 to drive first band pulley and makes the belt drive second band pulley pivoted effect, and the left and right sides of support 6 is the expansion bracket, makes things convenient for interior damper 11 to remove and carries out absorbing effect.

Now, the operation principle of the present invention is described as follows:

by arranging the movable rod 1102, the first belt wheel is driven by the driving motor set 4 to drive the belt to drive the second belt wheel to rotate, the second belt wheel drives the main shaft 3 to rotate, the main shaft 3 rotates in the bearing 2 to drive the fan body 5 to operate, then the noise caused by the vibration generated by the fan body 5 is transmitted to the bottom bracket 6 of the case bracket set 1, so that the connecting block 1103 inside the bracket 6 is driven by the vibration force to drive the moving rod 1102 to move, the moving rod 1102 moves to drive the moving block compression spring 1104, the real-time moving rod drives the damping block 1105 to move inside the fixed block 1101, the damping block 1105 buffers the vibration force caused by the movement of the moving rod 1102, and spring 1104 shrink and kick-back and also cushion carriage lever 1102, make the vibration of casing support group 1 obtain the buffering, make the effect of making an uproar of falling when fan body 5 moves, through setting up supporting leg 7, supporting leg 7 makes more stable effect when fan body 5 moves.

In use, first drive the first band pulley through driving motor group 4 and make the belt drive the second band pulley and rotate, the second band pulley drives main shaft 3 and rotates, main shaft 3 rotates at the inside of 2 of bearing and makes fan body 5 move, then casing support group 1 receives the noise transmission that fan body 5 driven two arouses to transmit for the support 6 of bottom, make the inside connecting block 1103 of support 6 receive the vibrations power and drive the carriage release lever 1102 and move, carriage release lever 1102 moves and drives movable block compression spring 1104, real-time carriage release lever drives snubber block 1105 and moves in the inside of fixed block 1101, snubber block 1105 makes the vibrations power buffering that carriage release lever 1102 moved and bring, and spring 1104 shrink also buffers carriage release lever 1102, make the vibration of casing support group 1 obtain the buffering, make fan body 5 fall the noise when moving.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. The utility model provides a centrifugal fan of low noise, includes casing support group (1), its characterized in that, the right side top fixed mounting of casing support group (1) has bearing (2), the right side top movable mounting of casing support group (1) have with bearing (2) fixed connection's main shaft (3), the right side fixed mounting of casing support group (1) has driving motor group (4), the inside fixed mounting of casing support group (1) has fan body (5) with bearing (2) fixed connection, the bottom fixed mounting of casing support group (1) has support (6), the inside fixed mounting of support (6) has damper (11).

2. The centrifugal fan with low noise according to claim 1, wherein the damping mechanism (11) comprises a fixing block (1101), a moving rod (1102), a connecting block (1103), a spring (1104) and a damping block (1105), the fixing block (1101) is fixedly installed inside the bracket (6), the moving rod (1102) is movably installed inside the fixing block (1101), the connecting block (1103) fixedly connected with the top of the moving rod (1102) is fixedly installed at the bottom of the casing bracket set (1), the spring (1104) is movably installed outside the moving rod (1102) and inside the fixing block (1101), and the damping block (1105) is fixedly installed at the bottom of the moving rod (1102).

3. The centrifugal fan with low noise as claimed in claim 2, wherein the fixed block (1101) has a cavity therein, and the top of the fixed block (1101) has a movable hole adapted to the movable rod (1102).

4. The centrifugal fan with low noise as claimed in claim 3, wherein a moving block fixedly connected with the moving rod (1102) is fixedly installed on the top of the spring (1104), and the length of the moving block is greater than the diameter of the moving hole.

5. The centrifugal fan with low noise as claimed in claim 2, wherein a support block is fixedly installed inside the fixing block (1101) and at the bottom of the spring (1104), and a moving hole matched with the moving rod (1102) is formed inside the support block.

6. The centrifugal fan with low noise according to claim 1, wherein a support leg (7) is fixedly installed at the bottom of the support (6), an inlet air duct (8) is fixedly installed at the left side of the casing support group (1), and a protective cover group (9) is fixedly installed outside the bearing (2) and the main shaft (3).

7. A centrifugal fan with low noise as claimed in claim 1, wherein a first belt wheel is fixedly installed on the right side of the driving motor set (4), a second belt wheel is fixedly installed on the right side of the main shaft (3), and a belt wheel protective cover (10) is fixedly installed outside the first belt wheel and the second belt wheel.