CN216430034U

CN216430034U - Negative pressure sealing device for centrifugal fan

Info

Publication number: CN216430034U
Application number: CN202122683324.8U
Authority: CN
Inventors: 杨正福
Original assignee: Jiangsu Shunlu Electromechanical Co ltd
Current assignee: Jiangsu Shunlu Electromechanical Co ltd
Priority date: 2021-11-04
Filing date: 2021-11-04
Publication date: 2022-05-03
Anticipated expiration: 2031-11-04

Abstract

The utility model belongs to the technical field of centrifugal fan, centrifugal fan negative pressure sealing device to the problem that the background art provided, now proposes following scheme, including the fan casing, fan casing internally mounted even has seal bearing's rotating vane, and rotating vane's one end is connected with driving motor, one side outer wall welding of fan casing has seal cartridge, and the seal cartridge outer wall has seal casing through the bolt fastening, seal casing internally mounted has the mount, and fan casing both sides outer wall all communicates communicating pipe. The utility model discloses a seal housing at driving motor's externally mounted to can provide a sealed environment, can reduce the negative pressure condition that driving motor rotated the in-process, keep device's whole leakproofness, and set up the cold water that the circulation flows in seal housing is inside, can cool down the protection to the motor, locate to install double-deck seal structure at centrifugal fan's connecting pipe moreover, can effectively improve the leakproofness of device.

Description

Negative pressure sealing device for centrifugal fan

Technical Field

The utility model relates to a centrifugal fan technical field especially relates to centrifugal fan negative pressure sealing device.

Background

In the gas transportation industry, a centrifugal fan is a commonly used device, and the centrifugal fan is a machine which increases the gas pressure and discharges gas by means of input mechanical energy, and is a driven fluid machine. Centrifugal fans are widely used in factories, mines, tunnels, cooling towers, vehicles, ships and buildings for ventilation, dust removal and cooling; 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.

And centrifugal fan is at the in-process of using, often because the vibration of fan leads to the kneck of fan to appear not hard up to lead to inside wind pressure not enough, thereby can appear the condition that fan work efficiency reduces.

SUMMERY OF THE UTILITY MODEL

The utility model aims at solving the defects existing in the prior art and providing a negative pressure sealing device of a centrifugal fan.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

centrifugal fan negative pressure sealing device, including the fan casing, fan casing internally mounted even has sealed bearing's rotating vane, and rotating vane's one end is connected with driving motor, the outer wall welding of one side of fan casing has sealed sleeve, and sealed sleeve outer wall has sealed casing through the bolt fastening, sealed casing internally mounted has the mount, and fan casing both sides outer wall all communicates communicating pipe, the outer wall welding of communicating pipe all has first sealing ring, and the outer wall welding of communicating pipe middle part has the second sealing ring, the outer wall welding of fan casing bottom has the fixing base, and the fixing base is pegged graft inside spacing shell.

Preferably, the sealed shell is internally provided with a cavity, the inner wall of the top of the cavity is communicated with a water inlet pipe, and the inner wall of the bottom of the cavity is communicated with a water outlet pipe.

Preferably, the outer wall of the top of the first sealing ring is provided with a first annular sealing groove, and the outer wall of the top of the second sealing ring is provided with a second annular sealing groove.

Preferably, the peripheral outer wall of the first sealing ring is provided with arc-shaped clamping grooves distributed at equal intervals, the outer wall of the top of the second sealing ring is provided with arc-shaped limiting grooves distributed at equal intervals, and the arc-shaped limiting grooves and the axes of the arc-shaped clamping grooves are positioned on the same straight line.

Preferably, the outer walls of two sides of the bottom of the fixing seat are welded with clamping blocks, clamping grooves are formed in two sides of the limiting shell, and the clamping blocks are in sliding fit with the clamping grooves.

Preferably, the inner wall of the bottom of the limiting shell is welded with damping springs distributed at equal intervals.

The utility model has the advantages that:

this centrifugal fan negative pressure sealing device of design, through a seal housing at driving motor's externally mounted to can provide a sealed environment for the driving motor outside, can reduce the negative pressure condition that driving motor rotated the in-process, keep device's whole leakproofness, and set up the cold water of circulation flow in seal housing is inside, can cool down the protection to the motor, locate the installation double-deck seal structure at centrifugal fan's connecting pipe moreover, can effectively improve device's leakproofness.

Drawings

Fig. 1 is a cross-sectional view of the overall structure of the centrifugal fan negative pressure sealing device provided by the present invention;

fig. 2 is a side view of the overall structure of the centrifugal fan negative pressure sealing device provided by the present invention;

fig. 3 is a schematic diagram of the centrifugal fan negative pressure sealing device according to the present invention.

In the figure: 1 fan housing, 2 rotating vane, 3 driving motor, 4 seal tube, 5 seal housing, 6 mounts, 7 cavitys, 8 inlet tubes, 9 drain pipes, 10 communicating pipes, 11 first sealing rings, 12 first annular seal grooves, 13 second sealing rings, 14 second annular seal grooves, 15 fixing bases, 16 spacing shells, 17 damping spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying 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.

Embodiment 1, refer to fig. 1-3, a centrifugal fan negative pressure sealing device includes a fan housing 1, a rotating blade 2 connected with a sealing bearing is installed inside the fan housing 1, one end of the rotating blade 2 is connected with a driving motor 3, a sealing sleeve 4 is welded on the outer wall of one side of the fan housing 1, a sealing housing 5 is fixed on the outer wall of the sealing sleeve 4 through bolts, a fixing frame 6 is installed inside the sealing housing 5, the fixing frame 6 can be matched with the driving motor 3, the fixing frame 6 can support and fix the driving motor to prevent the driving motor 3 from moving, and the outer walls of two sides of the fan housing 1 are both communicated with a communicating pipe 10;

the outer walls of the communicating pipes 10 are welded with first sealing rings 11, the outer wall of the middle of the communicating pipe 10 is welded with a second sealing ring 13, the outer wall of the bottom of the fan shell 1 is welded with a fixed seat 15, and the fixed seat 15 is inserted into a limiting shell 16;

the outer wall of the top of the first sealing ring 11 is provided with a first annular sealing groove 12, the outer wall of the top of the second sealing ring 13 is provided with a second annular sealing groove 14, a sealing shell 5 is arranged outside the driving motor 3, so that a sealed environment can be provided for the outside of the driving motor 3, the negative pressure condition in the rotation process of the driving motor 3 can be reduced, the integral sealing performance of the device is maintained, cold water which circularly flows is arranged inside the sealing shell, the motor can be cooled and protected, and the sealing performance of the device can be effectively improved by arranging a double-layer sealing structure at a connecting pipe of the centrifugal fan;

the outer wall all around of first sealing ring 11 all opens has the arc draw-in groove of equidistance distribution, and the outer wall of second sealing ring 13 top opens has the arc spacing groove of equidistance distribution, and the axle center of arc spacing groove and arc draw-in groove is located same straight line.

Example 2:

the method is a basic optimization and improvement of the embodiment 1, and specifically comprises the following steps:

a cavity 7 is formed in the sealed shell 5, the inner wall of the top of the cavity 7 is communicated with a water inlet pipe 8, the inner wall of the bottom of the cavity 7 is communicated with a water outlet pipe 9, and when the device is used, cold water which circularly flows is introduced into the water inlet pipe 8, so that the motor can be cooled and protected, and the equipment can be kept to be stably operated;

the outer walls of the two sides of the bottom of the fixing seat 15 are welded with clamping blocks, the clamping grooves are formed in the two sides of the limiting shell 16, the clamping blocks are in sliding fit with the clamping grooves, the damping springs 17 distributed at equal intervals are welded on the inner wall of the bottom of the limiting shell 16, and the vibration of the driving motor 3 can be effectively inhibited by the damping effect of the damping springs, so that the sealing performance of the joint is improved.

The working principle of the centrifugal fan negative pressure sealing device is as follows:

firstly, when the centrifugal fan negative pressure sealing device is used, firstly, the device is connected with an external power supply, then, external pipelines are respectively connected to the communicating pipes 10 on two sides of the fan shell 1, and external annular sealing rings are arranged inside the first annular sealing groove 12 and the second annular sealing groove 14 and then are fixed;

then, the driving motor 3 is started to drive the rotating blade 2 to rotate, so that the fan works, and when the driving motor 3 works, the damping spring 17 at the bottom can perform damping treatment, so that the sealing performance of the joint is improved;

and finally, introducing cold water into the water inlet pipe 8, and cooling the sealed shell 5 to maintain the driving motor 3 within a relatively normal working temperature range.

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 centrifugal fan negative pressure sealing device comprises a fan shell (1) and is characterized in that, the fan shell (1) is internally provided with a rotating blade (2) connected with a sealing bearing, one end of the rotating blade (2) is connected with a driving motor (3), the outer wall of one side of the fan shell (1) is welded with a sealing sleeve (4), a sealing shell (5) is fixed on the outer wall of the sealing sleeve (4) through bolts, a fixing frame (6) is arranged in the sealing shell (5), the outer walls of the two sides of the fan shell (1) are communicated with a communicating pipe (10), the outer wall of the communicating pipe (10) is welded with a first sealing ring (11), and the outer wall of the middle part of the communicating pipe (10) is welded with a second sealing ring (13), the outer wall of the bottom of the fan shell (1) is welded with a fixed seat (15), and the fixed seat (15) is inserted into the limiting shell (16).

2. The negative pressure sealing device for the centrifugal fan as claimed in claim 1, wherein a cavity (7) is formed in the sealing housing (5), the inner wall of the top of the cavity (7) is communicated with a water inlet pipe (8), and the inner wall of the bottom of the cavity (7) is communicated with a water outlet pipe (9).

3. The centrifugal fan negative pressure sealing device according to claim 1, wherein the first sealing ring (11) is provided with a first annular sealing groove (12) on the outer wall of the top, and the second sealing ring (13) is provided with a second annular sealing groove (14) on the outer wall of the top.

4. The negative pressure sealing device for the centrifugal fan as claimed in claim 1, wherein the first sealing ring (11) is provided with arc-shaped slots distributed equidistantly on the peripheral outer wall, and the second sealing ring (13) is provided with arc-shaped limiting slots distributed equidistantly on the top outer wall, and the arc-shaped limiting slots and the axes of the arc-shaped slots are located on the same straight line.

5. The negative pressure sealing device for the centrifugal fan as claimed in claim 1, wherein clamping blocks are welded to the outer walls of the two sides of the bottom of the fixing seat (15), clamping grooves are formed in the two sides of the limiting shell (16), and the clamping blocks and the clamping grooves form sliding fit.

6. The negative pressure sealing device for the centrifugal fan as claimed in claim 1, wherein the damping springs (17) are welded on the inner wall of the bottom of the limiting shell (16) and are distributed at equal intervals.