CN111472985B

CN111472985B - Vibration/noise reduction's centrifugal fan

Info

Publication number: CN111472985B
Application number: CN202010343062.8A
Authority: CN
Inventors: 周峰; 许宜峰
Original assignee: Jiangsu Yougeman Aviation Technology Co ltd
Current assignee: Jiangsu Yougeman Aviation Technology Co ltd
Priority date: 2020-04-27
Filing date: 2020-04-27
Publication date: 2021-04-09
Anticipated expiration: 2040-04-27
Also published as: CN111472985A

Abstract

The invention discloses a high-efficiency vibration-damping and noise-reducing centrifugal ventilator which comprises a fan shell, an impeller, a motor and a vibration-damping base, wherein the fan shell is provided with an air outlet and a movable ring, the movable ring is provided with a current collector, the impeller is arranged inside the fan shell and comprises a front disc, blades and a rear disc, the front disc is provided with a through hole, the rear disc is provided with a shaft sleeve, the blades are respectively and fixedly connected with the front disc and the rear disc, the motor is connected with the fan shell through an installation disc, an output shaft of the motor is clamped with the shaft sleeve, the vibration-damping base comprises a bottom plate and a support shell, the support shell is arranged at the upper end of the bottom plate, the upper end inside the support shell is movably provided with a guide rod, the guide rod is connected with a vibration-; the centrifugal fan provided by the invention is reasonable in structural design, can effectively inhibit noise and vibration generated in the operation process of the centrifugal fan, and is suitable for large-scale popularization.

Description

Vibration/noise reduction's centrifugal fan

Technical Field

The invention relates to the technical field of fluid machinery, in particular to a shock-absorbing noise-reducing centrifugal ventilator.

Background

The centrifugal fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion.

The existing centrifugal fan has the following defects: 1. air sucked by the centrifugal fan has a backflow condition in the fan shell, so that the working efficiency of the centrifugal fan is influenced; 2. the machine body shakes in the running process of the impeller, and huge noise is generated; 3. the air inlet amount of the device is not easy to adjust, so that the equipment loss is increased; 4. the running stability of the impeller is poor, and the failure rate is high.

Disclosure of Invention

Aiming at the technical problems, the invention provides the stable, reliable, efficient, shock-absorbing and noise-reducing centrifugal ventilator.

The technical scheme of the invention is as follows: a shock-absorbing noise-reducing centrifugal ventilator comprises a fan shell, an impeller, a motor and a shock absorption base; the fan shell is of a hollow cylindrical structure, an air outlet is formed in the fan shell, a movable ring is fixedly connected to one side of the fan shell through a bolt, an air inlet is formed in the movable ring, and a collector is fixedly connected to the air inlet through a bolt; the impeller is arranged in the fan shell and comprises a front disc, blades and a rear disc, a through hole communicated with the air inlet is formed in the front disc, a shaft sleeve is arranged on the rear disc, the shaft sleeve penetrates through the fan shell and is hermetically connected with the fan shell, the blades are arc-shaped plates, the number of the blades is 10-15, and the 10-15 blades are uniformly arranged along the circumferential direction of the through hole and are respectively fixedly connected with the front disc and the rear disc; the motor is fixedly provided with an installation disc, the installation disc is fixedly connected with the fan shell through a bolt, an output shaft of the motor is movably clamped with the shaft sleeve, and the motor is powered by an external power supply; vibration damping mount includes bottom plate and support housing, and support housing is fixed to be set up in the bottom plate upper end, and the support housing upper end is provided with the arc wall, and the inside upper end both sides homolevel of support housing is provided with the guide arm, rotatable joint between guide arm and the support housing, fixedly connected with shock attenuation board on the guide arm, through spring beam swing joint between the bottom in shock attenuation board and the support housing, the fan shell is located the arc wall, and the fan shell is through round pin axle and shock attenuation board activity hinge joint.

Furthermore, the cross section of the current collector is of an arc-shaped structure, an air door assembly is movably arranged on the current collector and comprises adjusting air plates, movable sleeves and adjusting pull rods, the adjusting air plates are fan-shaped plates, the adjusting air plates are provided with 6-9 adjusting air plates, the arc-shaped edges of the 6-9 adjusting air plates are rotatably clamped with the edge of the current collector respectively, a groove-shaped plate is arranged at the end part of each adjusting air plate, the movable sleeves are movably arranged on the outer side of the current collector through guide rods and can slide on the guide rods, the movable sleeves are movably hinged with the groove-shaped plates, the adjusting pull rods are rotatably clamped on the current collector, and the adjusting pull rods are in threaded connection with the movable sleeves; through setting up the air door subassembly, during the use, adjust the position of movable sleeve on the guide bar through adjusting the pull rod, and then make the cell type board drive and adjust the rotatory certain angle of aerofoil, adjust the intake of collector, improve the practicality of this device.

Furthermore, a spoiler is fixedly arranged between the front disc and the rear disc, is positioned between two adjacent blades and is close to the outer edges of the front disc and the rear disc, and the inclination angles of the spoiler and the blades are consistent; through setting up the spoiler, avoided the air current at fan shell internal reflux, can reduce the influence that the impeller received the axial vortex simultaneously, reduce the vortex noise.

Furthermore, a limiting ring is arranged on one side, close to the fan shell, of the front disc, the limiting ring is located on the outer side of the through hole, 8-12 strip-shaped grooves are annularly formed in the inner wall of the movable ring, a sliding rod is arranged inside each strip-shaped groove, a pressure spring is sleeved on each sliding rod, a bearing is connected onto each sliding rod through a rotating shaft, each rotating shaft can slide on each sliding rod, each rotating shaft is always close to the limiting ring under the action of the pressure spring, and the bearing is clamped with the outer ring of the limiting ring; through setting up spacing collar and bearing, can be so that impeller and fan shell lie in the same axis all the time on, stability when on the one hand can improve impeller operation, and on the other hand can make the gap between impeller and the fan shell even, noise reduction.

Furthermore, the outer wall of the limiting ring is bonded with a wear-resistant rubber ring; through setting up wear-resisting rubber circle, reduced the friction with the spacing collar when the bearing rotates, and then avoided the phenomenon of generating heat, also avoided resonant production simultaneously.

Furthermore, a key groove is formed in the shaft sleeve, a key groove is also formed in the output shaft of the motor, and the shaft sleeve and the output shaft are clamped and fixed through a clamping key after the shaft sleeve is sleeved on the output shaft; through set up the keyway on the output shaft of axle sleeve and motor for the output shaft of motor is more stable with being connected of axle sleeve, has avoided noise and vibration because connect unstable and produce.

The working principle of the invention is as follows: when the air-suction type fan is used, the motor is connected with an external power supply, the air outlet of the fan shell is connected with external load equipment, the motor drives the impeller to rotate in the fan shell, air is adsorbed in the fan shell from the current collector in the rotation process of the impeller, airflow with certain initial speed is formed between every two adjacent blades and is finally discharged from the air outlet, and the bearing is always attached to the outer wall of the limiting ring under the action of the pressure spring in the rotation process of the impeller, so that the stability of the impeller in operation can be improved; the position of the movable sleeve on the guide rod is adjusted through the adjusting pull rod, so that the groove-shaped plate drives the adjusting air plate to rotate by a certain angle, and the air inlet amount of the current collector is adjusted; during the operation of the motor, the generated vibration is eliminated under the combined action of the damping plate and the spring rod.

Compared with the prior art, the invention has the beneficial effects that: the vibration damping device is reasonable in structural design, and vibration generated in the running process of the motor can be eliminated by arranging the vibration damping base, so that the resonance phenomenon of the device is avoided; the compressible bearing is arranged on the movable ring to limit the rotation of the impeller, so that the impeller is prevented from swinging after being mechanically abraded, the stability and the reliability of the operation of the device are improved, the gap between the impeller and the shell of the fan can be ensured to be consistent all the time, the uniformity of air inlet is ensured, and the wind noise is reduced; the spoiler is arranged between the two adjacent blades, so that air flow is prevented from flowing back in the shell of the fan, the influence of axial vortex on the impeller can be reduced, and the vortex noise is reduced; through setting up the air door subassembly, be convenient for adjust the intake of collector, improved the maneuverability and the practicality of device.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a left side view of the present invention;

FIG. 3 is a schematic view of the connection of the damper to the header of the present invention;

FIG. 4 is a schematic view of the connection of the removable cover to the header of the present invention;

FIG. 5 is a schematic view of the connection of the bearing of the present invention to a movable ring;

FIG. 6 is a distribution diagram of the blades and spoilers of the present invention on the rear disk;

FIG. 7 is a schematic view of the internal structure of the vibration damper of the present invention;

wherein, 1-a fan shell, 10-an air outlet, 11-a movable ring, 110-an air inlet, 12-a current collector, 13-a pin shaft, 14-an air door component, 140-an air adjusting plate, 141-a movable sleeve, 1410-a guide rod, 142-an adjusting pull rod, 143-a groove plate, 15-a strip groove, 150-a slide rod, 151-a pressure spring, 152-a bearing and 2-an impeller, 20-front disc, 200-spacing ring, 21-blade, 22-rear disc, 220-shaft sleeve, 221-key groove, 23-spoiler, 3-motor, 30-mounting disc, 4-damping base, 40-bottom plate, 41-supporting shell, 410-arc groove, 411-guide rod, 412-damping plate and 413-spring rod.

Detailed Description

Example (b): the vibration and noise reduction centrifugal ventilator shown in fig. 1, 2, 3 and 4 comprises a fan shell 1, an impeller 2, a motor 3 and a vibration damping base 4; the fan shell 1 is of a hollow cylindrical structure, an air outlet 10 is formed in the fan shell 1, a movable ring 11 is fixedly connected to one side of the fan shell 1 through bolts, an air inlet 110 is formed in the movable ring 11, and a current collector 12 is fixedly connected to the air inlet 110 through bolts; the cross section of the current collector 12 is of an arc structure, the current collector 12 is movably provided with the damper assembly 14, the damper assembly 14 comprises adjusting air plates 140, movable sleeves 141 and adjusting pull rods 142, the adjusting air plates 140 are fan-shaped plates, the adjusting air plates 140 are provided with 8 adjusting air plates, the arc edges of the 8 adjusting air plates 140 are rotatably clamped with the edge of the current collector 12 respectively, the end part of each adjusting air plate 140 is provided with a groove-shaped plate 143, the movable sleeves 141 are movably arranged on the outer side of the current collector 12 through guide rods 1410, the movable sleeves 141 can slide on the guide rods 1410, the movable sleeves 141 are movably hinged with the groove-shaped plates 143, the adjusting pull rods 142 are rotatably clamped on the current collector 12, and the adjusting pull rods 142 are in threaded connection with the movable sleeves 141; by arranging the air door assembly 14, when the device is used, the position of the movable sleeve 141 on the guide rod 1410 is adjusted through the adjusting pull rod 142, so that the groove plate 143 drives the adjusting air plate 140 to rotate for a certain angle, the intake of the current collector 12 is adjusted, and the practicability of the device is improved;

as shown in fig. 1, 5, and 6, the impeller 2 is disposed inside the fan housing 1, the impeller 2 includes a front disk 20, blades 21, and a rear disk 22, a through hole communicated with the air inlet 110 is disposed on the front disk 20, a shaft sleeve 220 is disposed on the rear disk 22, the shaft sleeve 220 penetrates through the fan housing 1 and is hermetically connected with the fan housing 1, the blades 21 are arc-shaped plates, 13 blades 21 are disposed, the 13 blades 21 are uniformly disposed along the circumferential direction of the through hole, and are respectively and fixedly connected with the front disk 20 and the rear disk 22; a spoiler 23 is fixedly arranged between the front disc 20 and the rear disc 22, the spoiler 23 is positioned between two adjacent blades 21 and is close to the outer edges of the front disc 20 and the rear disc 22, and the inclination angles of the spoiler 23 and the blades 21 are consistent; by arranging the spoiler 23, airflow is prevented from flowing back in the fan shell 1, and meanwhile, the influence of axial vortex on the impeller 2 can be reduced, and the vortex noise is reduced; one side of the front disc 20 close to the fan shell 1 is provided with a limiting ring 200, the limiting ring 200 is located outside the through hole, the inner wall of the movable ring 11 is annularly provided with 10 strip-shaped grooves 15, a sliding rod 150 is arranged inside each strip-shaped groove 15, a pressure spring 151 is sleeved on each sliding rod 150, the sliding rod 150 is connected with a bearing 152 through a rotating shaft, the rotating shaft can slide on the sliding rod 150, the rotating shaft is always close to the limiting ring 200 under the action of the pressure spring 151, and the bearing 152 is clamped with the outer ring of the limiting ring 200; by arranging the limiting ring 500 and the bearing 152, the impeller 2 and the fan shell 1 can be always positioned on the same axis, so that the stability of the impeller 2 during operation can be improved, the gap between the impeller 2 and the fan shell 1 can be uniform, and the noise is reduced; the outer wall of the limiting ring 200 is bonded with a wear-resistant rubber ring; the friction between the bearing 152 and the limiting ring 200 when the bearing rotates is reduced by arranging the wear-resistant rubber ring, so that the heating phenomenon is avoided, and the generation of resonance is also avoided;

as shown in fig. 1 and 6, a mounting disc 30 is fixedly arranged on the motor 3, the mounting disc 30 is fixedly connected with the fan housing 1 through bolts, and an output shaft of the motor 3 is movably clamped with a shaft sleeve 220; the shaft sleeve 220 is provided with a key groove 221, the output shaft of the motor 3 is also provided with the key groove 221, and after the shaft sleeve 220 is sleeved on the output shaft, the shaft sleeve 220 and the output shaft are clamped and fixed through a clamping key; the key grooves 221 are formed in the shaft sleeve 220 and the output shaft of the motor 3, so that the connection between the output shaft of the motor 3 and the shaft sleeve 220 is more stable, and noise and vibration caused by unstable connection are avoided; the motor 3 is powered by an external power supply, and the motor 3 is a YZS-40-6 type three-phase asynchronous motor produced by Hendard Motor company of New rural City;

as shown in fig. 1, 2 and 7, damping base 4 includes bottom plate 40 and support housing 41, support housing 41 is fixed to be set up in bottom plate 40 upper end, support housing 41 upper end is provided with arc-shaped groove 410, the equal level in inside upper end both sides of support housing 41 is provided with guide arm 411, rotatable joint between guide arm 411 and the support housing 41, fixedly connected with damping plate 412 on the guide arm 411, through spring lever 413 swing joint between damping plate 412 and the bottom in the support housing 41, fan housing 1 is located arc-shaped groove 410, and fan housing 1 is through round pin axle 13 and damping plate 412 swing joint.

When the air-suction type fan is used, the motor 3 is connected with an external power supply, the air outlet 10 of the fan shell 1 is connected with an external load device, the motor 3 drives the impeller 2 to rotate in the fan shell 1, air is adsorbed in the fan shell 1 from the current collector 12 in the rotation process of the impeller 2, air flow with a certain initial speed is formed between every two adjacent blades 21 and is finally discharged from the air outlet 10, and the bearing 152 is always attached to the outer wall of the limiting ring 200 under the action of the pressure spring 151 in the rotation process of the impeller 2, so that the stability of the impeller 2 in operation is improved; the position of the movable sleeve 141 on the guide rod 1410 is adjusted by the adjusting pull rod 142, so that the slotted plate 143 drives the adjusting air plate 140 to rotate by a certain angle, and the air inlet amount of the current collector 12 is adjusted; during the operation of the motor 3, the generated vibration is eliminated by the combined action of the damping plate 412 and the spring rod 413.

Claims

1. A vibration and noise reduction centrifugal ventilator is characterized by comprising a fan shell (1), an impeller (2), a motor (3) and a vibration damping base (4); the fan shell (1) is of a hollow cylindrical structure, an air outlet (10) is formed in the fan shell (1), a movable ring (11) is fixedly connected to one side of the fan shell (1) through a bolt, an air inlet (110) is formed in the movable ring (11), and a current collector (12) is fixedly connected to the air inlet (110) through a bolt; the impeller (2) is arranged inside the fan shell (1), the impeller (2) comprises a front disc (20), blades (21) and a rear disc (22), a through hole communicated with the air inlet (110) is formed in the front disc (20), a shaft sleeve (220) is arranged on the rear disc (22), the shaft sleeve (220) penetrates through the fan shell (1) and is in sealing connection with the fan shell (1), the blades (21) are arc-shaped plates, 10-15 blades (21) are arranged, 10-15 blades (21) are uniformly arranged along the circumferential direction of the through hole and are respectively and fixedly connected with the front disc (20) and the rear disc (22); a mounting disc (30) is fixedly arranged on the motor (3), the mounting disc (30) is fixedly connected with the fan shell (1) through bolts, and an output shaft of the motor (3) is movably clamped with the shaft sleeve (220); the damping base (4) comprises a bottom plate (40) and a supporting shell (41), the supporting shell (41) is fixedly arranged at the upper end of the bottom plate (40), an arc-shaped groove (410) is formed in the upper end of the supporting shell (41), guide rods (411) are horizontally arranged on two sides of the inner upper end of the supporting shell (41), the guide rods (411) are rotatably clamped with the supporting shell (41), a damping plate (412) is fixedly connected onto the guide rods (411), the damping plate (412) is movably connected with the inner bottom of the supporting shell (41) through spring rods (413), the fan shell (1) is located in the arc-shaped groove (410), and the fan shell (1) is movably hinged with the damping plate (412) through a pin shaft (13);

the cross section of collector (12) is the arc structure, and the activity is provided with throttle subassembly (14) on collector (12), throttle subassembly (14) is including adjusting aerofoil (140), movable sleeve (141) and regulation pull rod (142), it is the sector plate to adjust aerofoil (140), and it is provided with 6-9 to adjust aerofoil (140), and the arc limit of 6-9 regulation aerofoil (140) is respectively with the rotatable joint in border department of collector (12), and the tip of every regulation aerofoil (140) all is provided with slotted plate (143), movable sleeve (141) pass through guide bar (1410) activity and set up in collector (12) outside, and movable sleeve (141) can slide on guide bar (1410), and movable sleeve (141) and slotted plate (143) activity hinge joint, the rotatable joint of regulation pull rod (142) is on collector (12), and adjusts pull rod (142) and movable sleeve (141) threaded connection, the current collector (12) with the arc-shaped cross section is arranged, so that energy loss of airflow entering the fan shell (1) can be reduced, and the flowability of the airflow entering the impeller (2) is promoted;

a spoiler (23) is fixedly arranged between the front disc (20) and the rear disc (22), the spoiler (23) is positioned between two adjacent blades and close to the outer edges of the front disc (20) and the rear disc (22), and the inclination angles of the spoiler (23) and the blades (21) are consistent;

one side, close to the fan shell (1), of the front disc (20) is provided with a limiting ring (200), the limiting ring (200) is located on the outer side of the through hole, 8-12 strip-shaped grooves (15) are annularly formed in the inner wall of the movable ring (11), a sliding rod (150) is arranged inside each strip-shaped groove (15), a pressure spring (151) is sleeved on each sliding rod (150), the sliding rod (150) is connected with a bearing (152) through a rotating shaft, the rotating shaft can slide on the sliding rod (150), the rotating shaft is always close to the limiting ring (200) under the action of the pressure spring (151), and the bearing (152) is connected with the outer ring of the limiting ring (200) in a clamping mode;

the outer wall of the limiting ring (200) is bonded with a wear-resistant rubber ring;

the motor is characterized in that a key groove (221) is formed in the shaft sleeve (220), the key groove (221) is also formed in the output shaft of the motor (3), and the shaft sleeve (220) is clamped and fixed with the output shaft through a clamping key after the shaft sleeve (220) is sleeved on the output shaft.