CN215444434U

CN215444434U - High-efficiency low-noise centrifugal ventilator

Info

Publication number: CN215444434U
Application number: CN202121921538.8U
Authority: CN
Inventors: 沈文斌; 丁金龙; 袁臻煜
Original assignee: Shanghai De Hui Specific Fan Co ltd
Current assignee: Shanghai De Hui Specific Fan Co ltd
Priority date: 2021-08-16
Filing date: 2021-08-16
Publication date: 2022-01-07
Anticipated expiration: 2031-08-16

Abstract

The utility model relates to a high-efficiency low-noise centrifugal ventilator which comprises a fan body and an underframe, wherein the bottom of a volute is fixedly provided with a bottom plate, the bottom plate is fixed on the top of a vertical plate through bolts, two sliding blocks are respectively in threaded connection with external threads of a bidirectional screw rod in different rotation directions, the tops of the two sliding blocks are respectively hinged with a supporting rod, and one ends of the two supporting rods, far away from the sliding blocks, are respectively hinged with the bottom of a vibration stopping block; the two-way screw rod is convenient to rotate to drive the two sliding blocks to synchronously move inwards along the sliding groove, and the two sliding blocks drive the vibration stopping block to move upwards to abut against the bottom of the bottom plate through the supporting rod, so that the vibration generated when the fan body works is reduced, and the noise is avoided.

Description

High-efficiency low-noise centrifugal ventilator

Technical Field

The utility model relates to the technical field of fans, in particular to a high-efficiency low-noise centrifugal fan.

Background

The centrifugal ventilator is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. The centrifugal ventilator is based on the principle of converting kinetic energy into potential energy, and utilizes an impeller rotating at high speed to accelerate gas, then decelerate and change the flow direction, so that the kinetic energy is converted into potential energy.

When the centrifugal fan operates, because the continuous rotation of impeller for the whole fan can vibrate, especially the spiral case, and the vibration degree is great, uses for a long time, and each tie point of fan can become flexible, finally leads to the fan to move unstably, produces great noise. And the centrifugal ventilator is heavy and heavy, and the efficiency of carrying and moving is low.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a high-efficiency low-noise centrifugal ventilator which can effectively eliminate noise so as to solve the problems in the prior art.

In order to solve the technical problems, the technical scheme of the utility model is as follows: the high-efficiency low-noise centrifugal ventilator comprises a fan body and an underframe, wherein the fan body comprises a volute, an air inlet and an air outlet are formed in the volute, an impeller is arranged in the volute, and a motor for driving the impeller to rotate is fixedly mounted on the outer side of the volute; the bottom of the volute is fixedly provided with a bottom plate, the left side and the right side of the top of the underframe are relatively and fixedly provided with two vertical plates, and the bottom plate is fixed on the tops of the vertical plates through bolts; the top of the bottom frame is provided with a sliding chute extending leftwards and rightwards, two sliding blocks are oppositely arranged leftwards and rightwards in the sliding chute, a bidirectional screw rod extending in the same direction is further arranged in the sliding chute, two ends of the bidirectional screw rod are respectively rotatably installed on the side wall of the sliding chute through a polished rod, external threads with opposite rotation directions are oppositely arranged leftwards and rightwards on the bidirectional screw rod in the sliding chute, the two sliding blocks are respectively in threaded connection with the external threads with different rotation directions of the bidirectional screw rod, and the polished rod at one end of the bidirectional screw rod extends to the outer side of the bottom frame and is fixedly provided with a first bolt head; the top of two the slider articulates respectively has the bracing piece, two the bracing piece is kept away from the one end of slider all articulates the bottom at the damping piece.

Preferably, the vibration damping block is a rubber vibration damping block.

As a further improvement, the bottom of the bottom frame is provided with two wheel shafts extending back and forth in a left-right relative rotation manner, the wheel shafts are provided with two rollers in a front-back relative rotation manner, the front end and the back end of each wheel shaft are respectively and fixedly provided with a cam, one side of each cam far away from the wheel shaft is provided with a supporting plane, the vertical distance between each supporting plane and the wheel shaft is greater than the radius of the corresponding roller, the minimum distance between the peripheral surface of each cam and the wheel shaft is smaller than the radius of the corresponding roller, and the bottom of the bottom frame is provided with an adjusting mechanism for driving the wheel shafts to rotate.

According to the preferable technical scheme, the adjusting mechanism comprises a worm wheel fixedly mounted in the middle of the wheel shafts, adjusting shafts extending from left to right are rotatably mounted at the bottom of the underframe and located above the two wheel shafts, worms meshed with the worm wheel are fixedly mounted on the adjusting shafts, and a crank is fixedly mounted at one end of each adjusting shaft.

As a further improvement, an installation cavity is arranged in the cam, a through hole which vertically penetrates through the supporting plane is formed in one side of the installation cavity, a supporting column is movably installed in the through hole, and a baffle plate located in the installation cavity is fixedly installed at one end of the supporting column; the mounting cavity is internally provided with a lead screw which extends in the same direction as the through hole, two ends of the lead screw are respectively rotatably arranged on the side wall of the mounting cavity through a polished rod, the baffle is in threaded connection with the lead screw, and the polished rod at one end of the lead screw, which is far away from the supporting plane, extends to the outer side of the cam and is fixedly provided with a second bolt head.

By adopting the technical scheme, the high-efficiency low-noise centrifugal ventilator comprises a fan body and an underframe, wherein a bottom plate is fixedly installed at the bottom of a volute, the bottom plate is fixed at the top of a vertical plate through bolts, two sliding blocks are respectively in threaded connection with external threads of the bidirectional screw rod in different rotation directions, supporting rods are respectively hinged to the tops of the two sliding blocks, and one ends of the two supporting rods, far away from the sliding blocks, are respectively hinged to the bottom of a vibration stopping block;

the two sliders are driven to synchronously move inwards along the sliding groove by rotating the bidirectional screw rod, and the two sliders drive the vibration stopping block to move upwards to abut against the bottom of the bottom plate through the supporting rod, so that vibration generated during the working of the fan body is reduced, and noise is avoided;

the utility model is convenient for supporting the idler wheel on the ground by rotating the wheel shaft, so as to efficiently move the bottom frame to drive the fan body to move, or the support plane is supported on the ground by rotating the wheel shaft, and the idler wheel is lifted and does not contact with the ground, so that the bottom frame is prevented from moving randomly, and the stable support is provided for the fan body;

the utility model is convenient for driving the supporting column to upwards retract into the through hole or downwards extend out of the through hole by rotating the screw rod, thereby avoiding the problem that the supporting plane can not be stably contacted with the ground due to uneven ground.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a first embodiment of the present invention;

FIG. 2 is a schematic right side view of the fan body of FIG. 1;

FIG. 3 is a schematic bottom view of the undercarriage of FIG. 1;

FIG. 4 is a schematic view of a support plane supported on the ground according to a first embodiment of the present invention;

fig. 5 is a schematic structural view of a cam according to a second embodiment of the present invention.

In the figure: 1-a fan body; 2-a chassis; 3-a volute; 4-air inlet; 5, air outlet; 6-impeller; 7-a motor; 8-a bottom plate; 9-standing the plate; 10-a chute; 11-a slide block; 12-a bidirectional lead screw; 13-a first bolt head; 14-a support bar; 15-vibration damping block; 16-an axle; 17-a support plate; 18-a roller; 19-a cam; 20-a support plane; 21-a worm gear; 22-an adjustment shaft; 23-mounting a plate; 24-a worm; 25-a mounting cavity; 26-a through hole; 27-a support column; 28-a baffle; 29-lead screw; 30-second bolt head.

Detailed Description

The first embodiment is as follows:

as shown in fig. 1 to 4, the high-efficiency low-noise centrifugal ventilator includes a blower body 1 and an underframe 2, the blower body 1 includes a volute 3, the volute 3 is provided with an air inlet 4 and an air outlet 5, an impeller 6 is arranged in the volute 3, and a motor 7 for driving the impeller 6 to rotate is fixedly mounted on the outer side of the volute 3; a bottom plate 8 is fixedly installed at the bottom of the volute 3, two vertical plates 9 are oppositely and fixedly installed on the left and right sides of the top of the bottom frame 2, and the bottom plate 8 is fixed on the tops of the vertical plates 9 through bolts; the top of the bottom frame 2 is provided with a sliding chute 10 extending left and right, the sliding chute 10 is positioned between the two vertical plates 9, two sliding blocks 11 are oppositely arranged left and right in the sliding chute 10, a bidirectional screw 12 extending in the same direction is also arranged in the sliding chute 10, two ends of the bidirectional screw 12 are respectively rotatably mounted on the side wall of the sliding chute 10 through a polish rod, external threads with opposite rotation directions are oppositely arranged left and right on the bidirectional screw 12 positioned in the sliding chute 10, the two sliding blocks 11 are respectively in threaded connection with the external threads with different rotation directions of the bidirectional screw 12, the polish rod at one end of the bidirectional screw 12 extends to the outer side of the bottom frame 2 and is fixedly mounted with a first bolt head 13; two the top of slider 11 articulates respectively has bracing piece 14, and two bracing pieces 14 are the splayed, two bracing piece 14 keeps away from the one end of slider 11 all articulates the bottom at ending the piece 15 that shakes, ending the piece 15 that shakes for the rubber piece that shakes.

During the installation, at first pass through the bolt fastening respectively with the both ends of bottom plate 8 on two risers 9, the area of contact at the bottom of bottom plate 8 and the top of chassis 2 has effectively been reduced in setting up of two risers 9 to the vibration of having avoided fan body 1 during operation leads to bottom plate 8 and chassis 2 friction to send the noise. After the bottom plate 8 is fixed, use the spanner to twist and move first bolt head 13 and drive two-way lead screw 12 and rotate, drive two sliders 11 through two-way lead screw 12 and move inwards in step along spout 10, two sliders 11 drive through bracing piece 14 and move up and support in the bottom of bottom plate 8 on the piece 15 that stops shaking, as shown in fig. 1 and fig. 4 to reduce the vibration that fan body 1 during operation produced, avoid the production of noise.

As shown in fig. 1 and 3, two axle shafts 16 extending back and forth are installed at the bottom of the chassis 2 in a left-right relative rotation manner, a support plate 17 is fixedly installed at the bottom of the chassis 2, the axle shafts 16 are installed on the support plate 17 in a rotating manner, two idler wheels 18 are installed on the axle shafts 16 in a front-back relative rotation manner, cams 19 are respectively and fixedly installed at the front end and the rear end of the axle shafts 16, a support plane 20 is arranged at one side of the cam 19 far from the axle shafts 16, the vertical distance between the support plane 20 and the axle shafts 16 is greater than the radius of the idler wheels 18, the minimum distance between the outer peripheral surfaces of the cams 19 and the axle shafts 16 is smaller than the radius of the idler wheels 18, and an adjusting mechanism for driving the axle shafts 16 to rotate is installed at the bottom of the chassis 2.

Specifically, the wheel shaft 16 is rotated to drive the cam 19 to rotate, so that the cam 19 rotates to be not in contact with the ground, and the roller 18 is supported on the ground, as shown in fig. 1, so that the chassis 2 is moved efficiently to drive the fan body 1 to move; or the supporting plane 20 is rotated to the bottom of the cam 19 by rotating the axle 16, so that the supporting plane 20 is supported on the ground and the roller 18 is lifted up and not contacted with the ground, as shown in fig. 4, thereby preventing the chassis 2 from moving freely, and providing stable support for the fan body 1.

As shown in fig. 1 and 3, the adjusting mechanism includes a worm wheel 21 fixedly installed in the middle of the wheel axle 16, an adjusting shaft 22 extending left and right is rotatably installed at the bottom of the base frame 2, an installation plate 23 is fixedly installed at the bottom of the base frame 2, the adjusting shaft 22 is rotatably installed on the installation plate 23, the adjusting shaft 22 is located above the two wheel axles 16, a worm 24 engaged with the worm wheel 21 is fixedly installed on the adjusting shaft 22, and a crank is fixedly installed at one end of the adjusting shaft 22.

When the adjusting device is used, the adjusting shaft 22 can be driven to rotate by rotating the crank, the adjusting shaft 22 drives the worm wheel 21 to rotate through the worm 24, and then the worm wheel 21 drives the wheel shaft 16 to rotate.

Example two:

as shown in fig. 5, the present embodiment is different from the first embodiment in that a mounting cavity 25 is provided in the cam 19, a through hole 26 penetrating the supporting plane 20 vertically is provided at one side of the mounting cavity 25, a supporting column 27 is movably installed in the through hole 26, and a baffle 28 located in the mounting cavity 25 is fixedly installed at one end of the supporting column 27; a lead screw 29 extending in the same direction as the through hole 26 is arranged in the mounting cavity 25, two ends of the lead screw 29 are respectively rotatably mounted on the side wall of the mounting cavity 25 through a polish rod, the baffle 28 is in threaded connection with the lead screw 29, and the polish rod at one end of the lead screw 29 far away from the supporting plane 20 extends to the outer side of the cam 19 and is fixedly provided with a second bolt head 30.

When the supporting plane 20 is supported on the ground, a wrench can be used to screw the second bolt head 30 and drive the screw 29 to rotate, the screw 29 drives the baffle 28 to move up and down when rotating, and the baffle 28 drives the supporting column 27 to retract into the through hole 26 upwards or extend out of the through hole 26 downwards, so that the supporting plane 20 cannot be stably contacted with the ground due to uneven ground is avoided.

The foregoing shows and describes the general principles, essential features, and advantages of the utility model. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. High efficiency low noise centrifugal fan, its characterized in that: the fan comprises a fan body and an underframe, wherein the fan body comprises a volute, an air inlet and an air outlet are formed in the volute, an impeller is arranged in the volute, and a motor for driving the impeller to rotate is fixedly installed on the outer side of the volute; the bottom of the volute is fixedly provided with a bottom plate, the left side and the right side of the top of the underframe are relatively and fixedly provided with two vertical plates, and the bottom plate is fixed on the tops of the vertical plates through bolts; the top of the bottom frame is provided with a sliding chute extending leftwards and rightwards, two sliding blocks are oppositely arranged leftwards and rightwards in the sliding chute, a bidirectional screw rod extending in the same direction is further arranged in the sliding chute, two ends of the bidirectional screw rod are respectively rotatably installed on the side wall of the sliding chute through a polished rod, external threads with opposite rotation directions are oppositely arranged leftwards and rightwards on the bidirectional screw rod in the sliding chute, the two sliding blocks are respectively in threaded connection with the external threads with different rotation directions of the bidirectional screw rod, and the polished rod at one end of the bidirectional screw rod extends to the outer side of the bottom frame and is fixedly provided with a first bolt head; the top of two the slider articulates respectively has the bracing piece, two the bracing piece is kept away from the one end of slider all articulates the bottom at the damping piece.

2. A high efficiency, low noise centrifugal fan as claimed in claim 1, wherein: the vibration damping block is a rubber vibration damping block.

3. A high efficiency, low noise centrifugal fan as claimed in claim 1, wherein: the bottom of the chassis is provided with two wheel shafts extending from front to back in a left-right relative rotating mode, the wheel shafts are provided with two idler wheels in a front-back relative rotating mode, cams are fixedly arranged at the front ends and the back ends of the wheel shafts respectively, one side, far away from the wheel shafts, of each cam is provided with a supporting plane, the vertical distance between each supporting plane and the wheel shafts is larger than the radius of the corresponding idler wheel, the minimum distance between the outer peripheral surfaces of the cams and the wheel shafts is smaller than the radius of the corresponding idler wheel, and the bottom of the chassis is provided with an adjusting mechanism used for driving the wheel shafts to rotate.

4. A high efficiency, low noise centrifugal fan as claimed in claim 3, wherein: the adjusting mechanism comprises worm wheels fixedly installed in the middle of the wheel shafts, adjusting shafts extending left and right are rotatably installed at the bottom of the underframe and located above the two wheel shafts, worms meshed with the worm wheels are fixedly installed on the adjusting shafts, and crank handles are fixedly installed at one ends of the adjusting shafts.

5. A high efficiency, low noise centrifugal fan as claimed in claim 3, wherein: a mounting cavity is arranged in the cam, a through hole which vertically penetrates through the supporting plane is formed in one side of the mounting cavity, a supporting column is movably mounted in the through hole, and a baffle plate located in the mounting cavity is fixedly mounted at one end of the supporting column; the mounting cavity is internally provided with a lead screw which extends in the same direction as the through hole, two ends of the lead screw are respectively rotatably arranged on the side wall of the mounting cavity through a polished rod, the baffle is in threaded connection with the lead screw, and the polished rod at one end of the lead screw, which is far away from the supporting plane, extends to the outer side of the cam and is fixedly provided with a second bolt head.