CN210889436U

CN210889436U - Fan sealing device

Info

Publication number: CN210889436U
Application number: CN201921650295.1U
Authority: CN
Inventors: 杨博; 谢婷; 方祝程
Original assignee: Huzhou Ruichen Environmental Protection Technology Co ltd
Current assignee: Huzhou Ruichen Environmental Protection Technology Co ltd
Priority date: 2019-09-29
Filing date: 2019-09-29
Publication date: 2020-06-30
Anticipated expiration: 2029-09-29

Abstract

The utility model discloses a fan sealing device aims at providing one kind and can seal for a long time and compact structure's fan sealing device. The novel motor casing comprises a casing, be equipped with the casing through-hole on the casing, install the rotation axis in the casing through-hole, rotation axis and casing rotate to be connected, be fixed with the bottom plate on the casing, casing through-hole department is arranged in to the bottom plate, be equipped with the bottom plate seal groove on the bottom plate, be equipped with the impeller on the rotation axis, the impeller is fixed on the rotation axis, be equipped with the impeller seal groove on the impeller, the impeller passes through the impeller seal groove and installs the side at the bottom plate with the cooperation of bottom plate seal groove, be equipped with installation clearance. The utility model has the advantages that: the sealing structure can be sealed for a long time and is compact; the additionally arranged gasket increases the contact area, reduces the pressure and prevents the looseness; a series of sealing gaps and sealing cavities are formed among the additionally arranged sealing rings, so that the sealing effect is improved.

Description

Fan sealing device

Technical Field

The utility model belongs to the technical field of the relevant technique of mechanical ventilation equipment and specifically relates to indicate a fan sealing device.

Background

The centrifugal ventilator is a general mechanical equipment for air supply or air draft, and can be widely applied to various industries needing air draft and air supply. Usually, the size of the opening at the position where the main shaft of the fan penetrates out is larger than the diameter of the corresponding main shaft, so that the main shaft is convenient to mount. After the blower is installed, a shaft seal is arranged at the position to prevent gas leakage caused by overlarge gap at the position where the casing passes through the shaft. The shaft seal mainly plays a role in sealing and is an oil-resistant rubber asbestos plate, and the shaft seal achieves the sealing effect through tight fit of the asbestos plate and the main shaft. When the bearing seat generates heat, the cooling impeller sucks hot gas out and outputs the hot gas in a radial direction.

On the spot, the main shaft is a rotating part, the shaft seal is a static part, and when the main shaft runs for a certain time, the oil-resistant rubber asbestos plate is abraded, the air leakage phenomenon occurs, and the asbestos plate needs to be replaced at the moment. The cooling impeller can rotate together with the main shaft after being installed, a certain gap is reserved between the shaft seal and the cooling impeller in order to prevent the cooling impeller from generating friction with a fixed shaft seal, the gap also increases the span between the two bearings to a certain extent, and the requirement of first-order critical rotating speed is met by a thickened shaft. Increasing the cost and reducing the cross-sectional area of the impeller inlet.

It is therefore desirable to provide a device which can seal for a long period of time without replacing the seal, and which can make the cooling bearing housing compact.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome among the prior art with high costs and the little not enough of the sectional area of impeller import, provide a fan sealing device that can seal for a long time and compact structure.

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

the utility model provides a fan sealing device, includes the casing, be equipped with the casing through-hole on the casing, install the rotation axis in the casing through-hole, rotation axis and casing rotate and connect, be fixed with the bottom plate on the casing, casing through-hole department is arranged in to the bottom plate, be equipped with the bottom plate seal groove on the bottom plate, be equipped with the impeller on the rotation axis, the impeller is fixed on the rotation axis, be equipped with on the impeller with bottom plate seal groove assorted impeller seal groove, the impeller passes through the impeller seal groove and installs the side at the bottom plate with the cooperation of bottom plate seal groove, impeller and bottom plate rotate and connect, be equipped with installation gap.

The fan is characterized in that a casing through hole is formed in the casing, a rotating shaft is installed in the casing through hole and is rotationally connected with the casing, a bottom plate is fixed on the casing and is arranged at the casing through hole, the split angle of the bottom plate is the same as that of the casing and is convenient to disassemble and assemble, the bottom plate is welded on the casing, a bottom plate sealing groove is formed in the bottom plate, an impeller is arranged on the rotating shaft and is a cooling impeller, the impeller is fixed on the rotating shaft, a bearing seat can generate heat when a fan runs, and accordingly the bearing seat generates heat, the cooling impeller is additionally arranged between a shaft seal and the bearing seat, when the bearing seat generates heat, the cooling impeller sucks away hot air of the bearing seat and reduces the temperature of the bearing seat, an impeller sealing groove matched with the bottom plate sealing groove is formed in the impeller, the, because the medium in the casing has certain temperature, the rotating shaft can generate thermal expansion to drive the impeller to move, and therefore the gap between the bottom plate and the impeller needs to be determined according to the calculation of the medium temperature.

Preferably, one side of the bottom plate is fixed on the casing, the bottom plate is welded with the casing, the bottom plate sealing groove is arranged on the other side of the bottom plate, a bottom plate through hole matched with the rotating shaft is formed in the bottom plate, and the rotating shaft is arranged in the bottom plate through hole.

Preferably, the impeller sealing groove is arranged on one surface of the impeller, the bottom plate sealing groove and the impeller sealing groove are matched with each other, a plurality of blades are uniformly distributed on the other surface of the impeller, an impeller through hole matched with the rotating shaft is formed in the impeller, the rotating shaft is fixed in the impeller through hole, an annular flanging is arranged on the impeller and arranged on the other surface of the impeller, the annular flanging is arranged at an opening of the impeller through hole, and the contact area between the impeller and the rotating shaft is increased.

Preferably, the impeller comprises an upper impeller shell and a lower impeller shell which are the same in shape and size, an upper shell threaded hole is formed in the upper impeller shell, a lower shell threaded hole matched with the upper shell threaded hole is formed in the lower impeller shell, a connecting bolt and a fastening nut are arranged between the upper shell threaded hole and the lower shell threaded hole, the upper impeller shell is connected with the upper impeller shell through the matching of the connecting bolt and the fastening nut and is fixed on a rotating shaft, the threaded connection is simple and convenient, the installation and the disassembly are easy, the maintenance is convenient, a gasket is installed on the connecting bolt, the gasket is arranged between the fastening nut and the impeller, the contact area is increased through the additionally arranged gasket, the pressure is reduced, and the looseness is prevented.

Preferably, a bottom plate sealing ring is arranged in the bottom plate sealing groove, an impeller sealing ring matched with the bottom plate sealing ring is arranged in the impeller sealing groove, a sealing cavity and a sealing gap are formed between the bottom plate sealing ring and the impeller sealing ring, a series of sealing gaps and sealing cavities are formed between the paired sealing rings, and fluid passes through a plurality of tortuous channels and generates great resistance through multiple throttling, so that the fluid is difficult to leak, and the sealing purpose is achieved.

The utility model has the advantages that: the sealing structure can be sealed for a long time and is compact; the additionally arranged gasket increases the contact area, reduces the pressure and prevents the looseness; a series of sealing gaps and sealing cavities are formed among the additionally arranged sealing rings, so that the sealing effect is improved; the connection mode is simple and convenient, and the installation, the disassembly and the maintenance are convenient; the cooling impeller that adds can be when the bearing frame generates heat, siphons away hot gas, reduces the temperature of bearing frame.

Drawings

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

FIG. 2 is a schematic structural view of the impeller of FIG. 1;

FIG. 3 is a schematic view of the connection between the impeller and the base plate of FIG. 1;

fig. 4 is an enlarged view at a in fig. 3.

In the figure: 1. the novel impeller comprises a housing, 2 parts of a base plate, 3 parts of a base plate through hole, 4 parts of a housing through hole, 5 parts of a rotating shaft, 6 parts of an impeller through hole, 7 parts of an impeller, 8 parts of an impeller sealing groove, 9 parts of a base plate sealing groove, 10 parts of a mounting gap, 11 parts of a blade, 12 parts of an annular flange, 13 parts of a base plate sealing ring, 14 parts of a sealing cavity, 15 parts of a lower impeller shell, 16 parts of an upper impeller shell, 17 parts of an impeller sealing ring, 18 parts of a sealing gap, 19 parts of a connecting bolt, 20 parts of an upper shell threaded hole, 21 parts of a lower shell threaded hole, 22.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description.

In the embodiment shown in fig. 1, a fan sealing device includes a casing 1, a casing through hole 4 is formed in the casing 1, a rotating shaft 5 is installed in the casing through hole 4, the rotating shaft 5 is rotatably connected with the casing 1, a bottom plate 2 is fixed on the casing 1, the casing through hole 4 is arranged in the bottom plate 2, a bottom plate sealing groove 9 is formed in the bottom plate 2, an impeller 7 is arranged on the rotating shaft 5, the impeller 7 is fixed on the rotating shaft 5, an impeller sealing groove 8 matched with the bottom plate sealing groove 9 is formed in the impeller 7, the impeller 7 is installed on the side surface of the bottom plate 2 through the matching of the impeller sealing groove 8 and the bottom plate sealing groove 9, the impeller 7 is rotatably connected with the bottom plate 2.

As shown in fig. 1, one side of the bottom plate 2 is fixed on the casing 1, the bottom plate sealing groove 9 is arranged on the other side of the bottom plate 2, the bottom plate 2 is provided with a bottom plate through hole 3 matched with the rotating shaft 5, and the rotating shaft 5 is arranged in the bottom plate through hole 3.

As shown in fig. 1 and 2, the impeller sealing groove 8 is disposed on one surface of the impeller 7, a plurality of blades 11 are uniformly distributed on the other surface of the impeller 7, the impeller 7 is provided with an impeller through hole 6 matched with the rotating shaft 5, the rotating shaft 5 is fixed in the impeller through hole 6, the impeller 7 is provided with an annular flange 12, the annular flange 12 is disposed on the other surface of the impeller 7, and the annular flange 12 is disposed at an opening of the impeller through hole 6.

As shown in fig. 3 and 4, the impeller 7 is composed of an upper impeller shell 16 and a lower impeller shell 15 which are identical in shape and size, an upper shell threaded hole 20 is formed in the upper impeller shell 16, a lower shell threaded hole 21 which is matched with the upper shell threaded hole 20 is formed in the lower impeller shell 15, a connecting bolt 19 and a fastening nut 23 are arranged between the upper shell threaded hole 20 and the lower shell threaded hole 21, the upper impeller shell 16 is connected with the upper impeller shell 16 through the matching of the connecting bolt 19 and the fastening nut 23 and is fixed on the rotating shaft 5, a gasket 22 is installed on the connecting bolt 19, and the gasket 22 is arranged between the fastening nut 23 and the impeller 7.

As shown in fig. 3, a bottom plate seal ring 13 is disposed in the bottom plate seal groove 9, an impeller seal ring 17 matching with the bottom plate seal ring 13 is disposed in the impeller seal groove 8, and a seal cavity 14 and a seal gap 18 are formed between the bottom plate seal ring 13 and the impeller seal ring 17.

The sealing principle is as follows: after the fan shell 1 is assembled, the bottom plate 2 is welded on the fan shell 1, and the split angle of the bottom plate 2 is the same as that of the fan shell 1, so that the fan shell is convenient to disassemble and assemble. The impeller 6 is divided into upper and lower parts and is fastened to the rotary shaft 5 by the engagement of a connecting bolt 19, a fastening nut 23 and a washer 22. Because the medium in the casing 1 has a certain temperature, the rotating shaft 5 will generate thermal expansion to drive the impeller 6 to move, so the installation gap 10 between the bottom plate 1 and the impeller 6 and the depth dimension between the bottom plate sealing ring 13 and the impeller sealing ring 17 need to be determined according to the medium temperature calculation. After the device is installed, the impeller 6 and the rotating shaft 5 are tightly held in the axial direction to play a sealing role for gas, a series of sealing cavities 14 and sealing gaps 18 are formed between the paired bottom plate sealing rings 13 and impeller sealing rings 17 in the radial direction, and fluid passes through a plurality of tortuous channels and generates great resistance after being throttled for a plurality of times, so that the fluid is difficult to leak, and the sealing purpose is achieved.

Claims

1. The fan sealing device is characterized by comprising a casing (1), a casing through hole (4) is formed in the casing (1), a rotating shaft (5) is installed in the casing through hole (4), the rotating shaft (5) is rotatably connected with the casing (1), a bottom plate (2) is fixed on the casing (1), the bottom plate (2) is arranged at the casing through hole (4), a bottom plate sealing groove (9) is formed in the bottom plate (2), an impeller (7) is arranged on the rotating shaft (5), the impeller (7) is fixed on the rotating shaft (5), an impeller sealing groove (8) matched with the bottom plate sealing groove (9) is formed in the impeller (7), the impeller (7) is installed on the side face of the bottom plate (2) through the matching of the impeller sealing groove (8) and the bottom plate sealing groove (9), and the impeller (7) is rotatably connected with the bottom plate (2), and a mounting gap (10) is arranged between the impeller (7) and the bottom plate (2).

2. The fan sealing device according to claim 1, wherein one surface of the base plate (2) is fixed on the casing (1), the base plate sealing groove (9) is disposed on the other surface of the base plate (2), the base plate (2) is provided with a base plate through hole (3) matched with the rotating shaft (5), and the rotating shaft (5) is disposed in the base plate through hole (3).

3. The fan sealing device according to claim 1, wherein the impeller sealing groove (8) is disposed on one surface of the impeller (7), a plurality of blades (11) are uniformly distributed on the other surface of the impeller (7), the impeller (7) is provided with an impeller through hole (6) matched with the rotating shaft (5), the rotating shaft (5) is fixed in the impeller through hole (6), the impeller (7) is provided with an annular flange (12), the annular flange (12) is disposed on the other surface of the impeller (7), and the annular flange (12) is disposed at an opening of the impeller through hole (6).

4. The fan seal device according to claim 1, wherein the impeller (7) is composed of an upper impeller shell (16) and a lower impeller shell (15) which are identical in shape and size, an upper shell threaded hole (20) is arranged on the upper impeller shell (16), a lower shell threaded hole (21) matched with the upper shell threaded hole (20) is arranged on the lower impeller shell (15), a connecting bolt (19) and a fastening nut (23) are arranged between the upper shell threaded hole (20) and the lower shell threaded hole (21), the upper impeller shell (16) is connected with the upper impeller shell (16) through the matching of a connecting bolt (19) and a fastening nut (23) and is fixed on the rotating shaft (5), and a gasket (22) is arranged on the connecting bolt (19), and the gasket (22) is arranged between the fastening nut (23) and the impeller (7).

5. The fan sealing device according to claim 1, wherein a bottom plate sealing ring (13) is disposed in the bottom plate sealing groove (9), an impeller sealing ring (17) matching with the bottom plate sealing ring (13) is disposed in the impeller sealing groove (8), and a sealing cavity (14) and a sealing gap (18) are formed between the bottom plate sealing ring (13) and the impeller sealing ring (17).