CN212177476U

CN212177476U - Damping mounting structure of parallel centrifugal fans

Info

Publication number: CN212177476U
Application number: CN202020819284.8U
Authority: CN
Inventors: 丁震华
Original assignee: Hangzhou Yuhang Special Blower Co ltd
Current assignee: Hangzhou Yuhang Special Blower Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2020-12-18
Anticipated expiration: 2030-05-15

Abstract

The utility model relates to a centrifugal fan field especially relates to a centrifugal fan's shock attenuation mounting structure side by side, which comprises a worktable, be provided with an explosion-proof inverter motor on the board, explosion-proof inverter motor is provided with a pivot along the outside extension of board, the pivot middle part is provided with a pivot seat, the pivot front end concatenates has two centrifugal fan impellers, and every centrifugal fan impeller below is provided with an elastic buffer seat respectively. The utility model overcomes centrifugal fan side by side among the prior art lacks damping device, consequently takes place vibrations easily in the use, probably harms the defect of the normal operating of fan, consequently the utility model has the advantages of can effectively play the shock attenuation effect to centrifugal fan side by side, promoted the life of fan, can cool off the pivot simultaneously, promote the life of pivot.

Description

Damping mounting structure of parallel centrifugal fans

Technical Field

The utility model relates to a centrifugal fan field especially relates to a centrifugal fan's shock attenuation mounting structure side by side.

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 parallel centrifugal fans are obtained by connecting a plurality of groups of centrifugal fan impellers in series, the air output of the centrifugal fan set arranged in parallel is greatly improved, and the axial length and the efficiency of the centrifugal fans can be improved. However, the parallel centrifugal fans are easy to vibrate in the operation process, so that the use stability of the centrifugal fans is reduced.

For example, a parallel centrifugal fan of application No. CN201810819537.9 includes a base member and an impeller member. When the centrifugal fan operates, in the process that the motor drives the impeller of the impeller component to rotate, the impeller stirs a part of airflow in the air inlet inner cavity to flow to the inner cavity of the confluence volute, the flow of the airflow entering the inner cavity of the impeller is increased, and the large-flow airflow is decelerated and pressurized in the inner cavity of the centrifugal volute, so that the pressure of the airflow output by the centrifugal fan is improved. In the process that the airflow enters the inner cavity of the impeller from the inner cavity of the confluence volute, the impeller blades exert force on the airflow, so that the airflow flows from the impeller confluence section to the impeller centrifugal section with low energy loss. The structural characteristics of the inner cavity of the confluence volute increase the sectional area of the air flow entering the inner cavity of the impeller, shorten the axial length of the confluence section of the impeller, and enable the centrifugal fan to be compact in structure. The centrifugal fan has the advantages of unlimited axial length, large output airflow pressure and high efficiency. But it has no damping device, so it is easy to appear the defect of comparatively violent vibrations during the use.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome centrifugal fan side by side among the prior art and lack damping device, consequently take place vibrations easily in the use, probably harm the defect of the normal operating of fan, provide a centrifugal fan's shock attenuation mounting structure side by side, it can play effectively to slow down centrifugal fan's vibrations, prevents because shake the too big defect that the fan that leads to damaged.

In order to realize the purpose of the utility model, the utility model discloses a following technical scheme realizes:

the utility model provides a centrifugal fan's shock attenuation mounting structure side by side, includes the board, be provided with an explosion-proof inverter motor on the board, explosion-proof inverter motor is provided with a pivot along the outside extension of board, the pivot middle part is provided with a pivot seat, the pivot front end is connected in series has two centrifugal fan impellers, and every centrifugal fan impeller below is provided with an elastic buffer seat respectively.

The centrifugal fans are arranged at the positions of the impellers after being arranged in parallel, because the air quantity is unstable, surge is easy to occur, and when the surge is increased to a certain degree, the impeller is easy to be damaged hard, so that the impeller cannot work normally. Therefore, the utility model discloses still be provided with an elastic buffer seat in centrifugal fan impeller's below when the design, can absorb its vibrations at centrifugal fan impeller vibrations in-process to play absorbing effect, and then prolonged its life.

Preferably, the elastic buffer seat comprises a supporting base, a containing cavity matched with the shape of the centrifugal fan impeller is formed in the supporting base, the centrifugal fan impeller can be contained in the containing cavity, and a plurality of damping rubber strips are arranged on the surface of the containing cavity.

Set up on the elastic buffer seat and hold the chamber and can effectively carry on spacingly to centrifugal fan impeller, prevent to take place the displacement at vibrations in-process, set up simultaneously and set up the vibrations that the chamber surface set up shock attenuation adhesive tape can effectively absorb centrifugal fan impeller during operation production.

Preferably, a groove is formed in the surface of the accommodating cavity below the damping rubber strip, a damping spring is arranged in the groove, a supporting block is fixedly connected to the upper end of the damping spring, and the supporting block is fixedly connected with the damping rubber strip.

Preferably, the damping spring and the supporting block are arranged to further improve the damping effect on the premise of effectively supporting the centrifugal fan impeller.

Preferably, the number of the shock absorbing rubber strips is 3, and the shock absorbing rubber strips are uniformly distributed on the surface of the accommodating cavity.

Preferably, a shock-absorbing rubber pad is further arranged on the upper surface of the machine platform and below the explosion-proof variable frequency motor.

The explosion-proof variable frequency motor can also generate larger vibration at the moment of starting and stopping, so that the vibration of the explosion-proof variable frequency motor can be effectively reduced by arranging the shock-absorbing rubber pad below the explosion-proof variable frequency motor.

Preferably, a rotating shaft cooling seat is further arranged above the machine platform and between the rotating shaft seat and the centrifugal fan impeller, a water inlet and a water outlet are respectively formed in the rotating shaft cooling seat, and the rotating shaft penetrates through the rotating shaft cooling seat.

At some specific operating mode, for example the temperature of in-process pivot at the discharge steam can promote rapidly, leads to the intensity greatly reduced of pivot, consequently the utility model discloses set up a pivot cooling seat and can effectively cool down the processing to the pivot between pivot seat and centrifugal fan impeller, promoted the intensity of pivot.

Preferably, a steam pipe is further arranged above the explosion-proof variable frequency motor.

Therefore, the utility model discloses following beneficial effect has:

(1) the damping device can effectively play a role in damping the centrifugal fan impellers of the parallel centrifugal fans, and prolongs the service life of the fans;

(2) the vibration of the motor can be effectively reduced;

(3) can cool off the pivot, promote the life of pivot.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the connection structure between the centrifugal fan impeller and the elastic buffer seat of the present invention.

Wherein: the device comprises a machine table 1, an explosion-proof variable frequency motor 2, a rotating shaft 3, a rotating shaft seat 4, a centrifugal fan impeller 5, an elastic buffer seat 6, a supporting base 7, a containing cavity 8, a damping rubber strip 9, a groove 10, a damping spring 11, a supporting block 12, a damping rubber pad 13, a rotating shaft cooling seat 14, a water inlet 15, a water outlet 16 and a steam pipe 17.

Detailed Description

The invention is further described with reference to the drawings and the specific embodiments. Those of ordinary skill in the art will be able to implement the invention based on these descriptions. Moreover, references to embodiments of the invention in the following description are generally only to be considered as examples of the invention, and not as all embodiments. Therefore, all other embodiments obtained by a person of ordinary skill in the art without creative efforts based on the embodiments of the present invention shall fall within the protection scope of the present invention.

Examples

As shown in fig. 1, the damping mounting structure of the parallel centrifugal fans comprises a machine table 1, wherein an explosion-proof variable frequency motor 2 is arranged on the machine table 1, a steam pipe 17 is arranged above the explosion-proof variable frequency motor, and a damping rubber pad 13 for slowing down vibration generated during starting and emergency stopping is arranged below the explosion-proof variable frequency motor. In addition, this explosion-proof inverter motor 2 is provided with a pivot 3 along the outside extension of board 1, and its front end is connected in series has two centrifugal fan impeller 5 for centrifugal fan impeller 5 can be along with the rotation of pivot 3 and normally work, and wherein every centrifugal fan impeller 5 below still is provided with an elastic buffer seat 6 respectively, thereby can effectively slow down the surge that produces in the centrifugal fan impeller 5 course of operation.

The middle part of the rotating shaft 3 is provided with a rotating shaft seat 4 fixedly connected with the machine table 1, so that the rotating shaft 3 can be effectively supported by the rotating shaft seat 4.

Meanwhile, a rotating shaft cooling seat 14 for cooling the rotating shaft 3 is further arranged above the machine table 1 and between the rotating shaft seat 4 and the centrifugal fan impeller 5, a water inlet 15 for introducing cooling water and a water outlet 16 for discharging the cooling water are respectively formed in the rotating shaft cooling seat, and when the rotating shaft 3 penetrates through the rotating shaft cooling seat 14, the introduced cooling water can effectively cool the rotating shaft 3.

As shown in fig. 2, the elastic buffer seat 6 includes a supporting base 7, and a containing cavity 8 matched with the centrifugal fan impeller 5 in shape is arranged in the supporting base 7, so that the centrifugal fan impeller 5 can be contained in the containing cavity 8. Thereby playing a limiting role and preventing the displacement of the vibration generator.

Simultaneously holding 8 surfaces in chamber and being provided with three recess 10, every recess 10 inside all is connected with a damping spring 11, this damping spring 11's upper end fixed connection is provided with a supporting shoe 12, supporting shoe 12 top and a damping rubber strip 9 to splicing, damping rubber strip 9 closely laminates with centrifugal fan impeller 5 surface when centrifugal fan impeller 5 is holding 8 insides to effectively support centrifugal fan impeller 5 through damping spring 11.

When the centrifugal fan impeller 5 vibrates, the vibration generated by the centrifugal fan impeller 5 can be effectively absorbed by the damping rubber strips 9 and the damping springs 11, so that the damage failure of the centrifugal fan impeller 5 caused by overlarge vibration is avoided.

Claims

1. The utility model provides a centrifugal fan's shock attenuation mounting structure side by side, includes board (1), be provided with an explosion-proof inverter motor (2) on board (1), explosion-proof inverter motor (2) are provided with a pivot (3) along board (1) outside extension, pivot (3) middle part is provided with a pivot seat (4), its characterized in that, pivot (3) front end is connected in series has two centrifugal fan impeller (5), and every centrifugal fan impeller (5) below is provided with an elastic buffer seat (6) respectively.

2. The damping mounting structure of the parallel centrifugal fan as claimed in claim 1, wherein the elastic buffer seat (6) comprises a supporting base (7), a containing cavity (8) matched with the shape of the centrifugal fan impeller (5) is arranged inside the supporting base (7), so that the centrifugal fan impeller (5) can be contained inside the containing cavity (8), and a plurality of damping rubber strips (9) are arranged on the surface of the containing cavity (8).

3. The damping mounting structure of the parallel centrifugal fan as claimed in claim 2, wherein a groove (10) is formed in the surface of the accommodating cavity (8) below the damping rubber strip (9), a damping spring (11) is arranged in the groove (10), a supporting block (12) is fixedly connected to the upper end of the damping spring (11), and the supporting block (12) is fixedly connected with the damping rubber strip (9).

4. A damping mounting structure of a juxtaposed centrifugal fan according to claim 2 or 3, characterized in that the number of damping rubber strips (9) is 3, which are evenly distributed on the surface of the accommodating chamber (8).

5. The damping mounting structure of the parallel centrifugal fans as claimed in claim 1, wherein a damping rubber pad (13) is further disposed on the upper surface of the machine table (1) below the explosion-proof variable frequency motor (2).

6. The damping mounting structure of the parallel centrifugal fans as claimed in claim 1, 2, 3 or 5, wherein a rotating shaft cooling seat (14) is further disposed above the machine platform (1) between the rotating shaft seat (4) and the centrifugal fan impeller (5), a water inlet (15) and a water outlet (16) are respectively disposed thereon, and the rotating shaft (3) penetrates through the rotating shaft cooling seat (14).

7. The damping mounting structure of the parallel centrifugal fan as claimed in claim 6, wherein a steam pipe (17) is further arranged above the explosion-proof variable frequency motor (2).