CN113074134A

CN113074134A - Sealing device between centrifugal fan casing and shaft

Info

Publication number: CN113074134A
Application number: CN202110320144.5A
Authority: CN
Inventors: 徐玉
Original assignee: Jiangsu Tailong Fan Manufacturing Co ltd
Current assignee: Jiangsu Tailong Fan Manufacturing Co ltd
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2021-07-06

Abstract

The invention discloses a sealing device between a centrifugal fan shell and a shaft, which comprises a driving motor, wherein the lower end of the driving motor is fixedly provided with a base, the lower end of the base is fixedly provided with a supporting frame, the right end of the supporting frame is fixedly provided with a supporting seat, the upper end of the supporting seat is fixedly provided with a ventilation assembly, the right end of the ventilation assembly is fixedly provided with an air inlet cover, and the left end of the ventilation assembly is fixedly provided with a sealing assembly. According to the sealing assembly, when air passes through the gap between the bearing and the fan shell, the strong airflow pushes the separation blade to extrude the spring on the outer surface of the installation pipe, so that the sealing barrel is pressurized into the sealing ring, the sealing sleeve can increase the sealing performance between the sealing ring and the sealing barrel, the sealing performance of the centrifugal fan can be increased, the working efficiency of the fan can be improved, the working stability of the fan is improved, and workers can conveniently maintain and replace the sealing assembly.

Description

Sealing device between centrifugal fan casing and shaft

Technical Field

The invention relates to the technical field of centrifugal fan casings, in particular to a sealing device between a centrifugal fan casing and a shaft.

Background

The centrifugal fan drives the impeller to rotate by the motor, the blades in the impeller force the gas to rotate and do work on the gas to increase the energy of the gas, the gas is thrown out to the periphery of the impeller under the action of centrifugal force, the speed energy is converted into pressure energy by the volute casing, after the gas in the impeller is discharged, the pressure in the impeller is lower than the pressure in the air inlet, new gas is sucked into the impeller under the action of pressure difference, the gas is continuously output from the outlet, the centrifugal fan adopts a reasonable impeller angle design according to the air flow mechanics, no mechanical friction reasonable blade line is generated during operation to reduce the noise to the lowest degree, the impeller with optimized design reduces the axial force to the lowest degree and has high efficiency, and the whole machine operates stably through static-dynamic balance correction, the bearing amplitude is smaller under the condition of not adding any vibration damper, and a sealing device can be used between a centrifugal fan shell and a shaft to ensure that the fan cannot leak air when in use, so that the working efficiency of the fan is improved greatly.

But sealing device between present centrifugal fan casing and the axle has great gap between the shell of fan and the axle when using, and the gap is great can reduce the work efficiency of fan and can lead to inside flabellum to rotate unstably to the trouble that installation and change are also more is difficult for the staff to maintain, and centrifugal fan motor high temperature heat dissipation is slower when long-term the use, thereby reduces the life of motor, so now need a sealing device between centrifugal fan casing and the axle urgently.

Disclosure of Invention

The invention mainly aims to provide a sealing device between a centrifugal fan shell and a shaft, which can effectively solve the problems in the background art.

In order to achieve the purpose, the invention adopts the technical scheme that:

a sealing device between a centrifugal fan shell and a shaft comprises a driving motor, wherein a base is fixedly mounted at the lower end of the driving motor, a support frame is fixedly mounted at the lower end of the base, a support seat is fixedly mounted at the right end of the support frame, a ventilation assembly is fixedly mounted at the upper end of the support seat, an air inlet cover is fixedly mounted at the right end of the ventilation assembly, a sealing assembly is fixedly mounted at the left end of the ventilation assembly, and a fan blade is fixedly mounted at the right end of the sealing assembly, which is positioned in the ventilation assembly;

the sealing assembly comprises a mounting plate, a round hole penetrating through the left end and the right end is formed in the center of the left end of the mounting plate, a bearing is fixedly mounted inside the round hole, an rotating shaft is fixedly mounted inside the bearing, the right end of the rotating shaft is fixedly connected with a fan blade, a sealing ring is sleeved on the outer surface of the bearing, the sealing ring is fixedly mounted at the right end of the mounting plate, a mounting ring is fixedly mounted at the right end of the bearing, a mounting pipe is fixedly mounted at the right end of the mounting ring, a spring and a separation blade are sleeved on the outer surface of the mounting pipe, one end of the spring is fixedly connected with the mounting ring, the other end of the spring is fixedly connected with the separation blade.

Preferably, the right end of the sealing ring is provided with a circular groove, and a rubber leather ring is fixedly arranged in the groove.

Preferably, the sealing cylinder is located inside the sealing ring, and the sealing sleeve is sleeved outside the sealing ring and provided with an arc radian.

Preferably, the right end of the rotating shaft penetrates through the mounting ring and the mounting pipe and is not in contact with the mounting ring and the mounting pipe.

Preferably, the ventilation assembly comprises a fan shell, the front part of the outer surface of the fan shell is fixedly provided with a ventilation pipe which is communicated with the inner cavity of the fan shell, the upper end of the ventilation pipe is fixedly provided with a sealing ring, the upper part of the outer surface of the fan shell is fixedly provided with a connecting block, the upper end of the connecting block is fixedly provided with a connecting pipe, the right end of the connecting pipe is fixedly provided with a fan, the rear part of the outer surface of the fan shell is fixedly provided with a connecting plate, the rear end of the connecting plate is fixedly provided with a hollow pipe, the right end of the fan shell is fixedly provided with an.

Preferably, the rotating shaft is fixedly connected with the rotating shaft at the output end of the driving motor, and the mounting plate is fixedly mounted at the left end of the fan shell.

Preferably, the left ends of the connecting pipe and the hollow pipe are both provided with a certain radian towards a driving motor, and the right part of the hollow pipe is provided with a ninety-degree included angle towards the center of the air inlet cover.

Compared with the prior art, the invention has the following beneficial effects:

1. through the seal assembly who sets up, the air current of intensity can promote the spring of separation blade extrusion installation pipe's surface when the air passes through the clearance between bearing and the fan shell to with the inside of sealing cylinder pressurization income sealing ring, and the seal cover can increase the leakproofness between sealing ring and the sealing cylinder, can increase centrifugal fan's leakproofness and can also improve the work efficiency of fan, thereby improve the stability of fan work, also make things convenient for the staff to maintain the change.

2. Through setting up ventilation assembly, the center of the lid of admitting air in the right-hand member of hollow tube has the inside that the air passes through the hollow tube, the air intake of the left end of hollow tube is more advanced to produce the air current apart from driving motor's position and takes away driving motor because of the heat that gives off for a long time using, the fan will send the air to in the connecting tube from dispelling the heat to driving motor, increase driving motor's radiating efficiency increases the life of motor, reduces the maintenance number of times of motor.

Drawings

FIG. 1 is a schematic view of the overall structure of a sealing device between a centrifugal fan casing and a shaft according to the present invention;

FIG. 2 is a schematic view of the connection of a sealing device between a centrifugal fan casing and a shaft according to the present invention;

FIG. 3 is a schematic view of the overall structure of a seal assembly in the sealing device between the casing and the shaft of the centrifugal fan according to the present invention;

FIG. 4 is a cross-sectional view of a seal cartridge and a seal cartridge in a seal assembly between a centrifugal fan casing and a shaft according to the present invention;

FIG. 5 is a schematic view of a ventilation assembly in a sealing arrangement between a centrifugal fan casing and a shaft according to the present invention;

fig. 6 is a schematic view of the overall structure of a ventilation assembly in the sealing device between the centrifugal fan casing and the shaft according to the present invention.

In the figure: 1. a drive motor; 2. a base; 3. a support frame; 4. a supporting seat; 5. a ventilation assembly; 51. A fan housing; 52. a vent pipe; 53. a seal ring; 54. a connecting plate; 55. a hollow tube; 56. connecting blocks; 57. a connecting pipe; 58. a fan; 6. a seal assembly; 61. a rotating shaft; 62. mounting a plate; 63. a circular hole; 64. a bearing; 65. a seal ring; 66. a mounting ring; 67. installing a pipe; 68. a spring; 69. sealing sleeves; 611. a baffle plate; 612. a sealing cylinder; 7. a fan blade; 8. and an air inlet cover.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front", "rear", "both ends", "one end", "the other end", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and the like are to be construed broadly, such as "connected," which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

As shown in fig. 1-6, a sealing device between a centrifugal fan casing and a shaft comprises a driving motor 1, wherein a base 2 is fixedly installed at the lower end of the driving motor 1, a supporting frame 3 is fixedly installed at the lower end of the base 2, a supporting seat 4 is fixedly installed at the right end of the supporting frame 3, a ventilation assembly 5 is fixedly installed at the upper end of the supporting seat 4, an air inlet cover 8 is fixedly installed at the right end of the ventilation assembly 5, a sealing assembly 6 is fixedly installed at the left end of the ventilation assembly 5, and a fan blade 7 is fixedly installed at the right end of the sealing assembly 6, which is positioned inside the ventilation assembly;

the fan blade 7 blade line reduces the noise to the lowest, the impeller with optimized design reduces the axial force to the lowest and has high-efficiency impeller, the whole machine operates stably through static and dynamic balance correction, the bearing amplitude is small under the condition of not adding any vibration damper, the model of the driving motor 1 of the centrifugal fan is Y80M1-4, and the rated power is 0.55 KW.

Seal assembly 6 includes mounting panel 62, the round hole 63 that runs through about the left end center department of mounting panel 62 has been seted up, the inside fixed mounting of round hole 63 has bearing 64, the inside fixed mounting of bearing 64 has axis of rotation 61, the right-hand member and the fan leaf 7 fixed connection of axis of rotation 61, the surface cover of bearing 64 is equipped with sealing ring 65, sealing ring 65 fixed mounting is at the right-hand member of mounting panel 62, the right-hand member fixed mounting of bearing 64 has collar 66, the right-hand member fixed mounting of collar 66 has installation pipe 67, the surface cover of installation pipe 67 is equipped with spring 68 and separation blade 611, the one end and the collar 66 fixed connection of spring 68, the other end and the separation blade 611 fixed connection of spring 68, the left end fixed mounting of separation blade 611.

It is worth mentioning that the fan blade 7 generates a large amount of air flow inside during rotation, some air is exhausted through the gap between the bearing 64 and the fan housing 51, the air flow with strength when passing through the gap between the bearing 64 and the fan housing 51 pushes the baffle plate 611 to press the spring 68 on the outer surface of the mounting tube 67, so as to press the sealing cylinder 612 into the sealing ring 65, and the sealing sleeve 69 increases the sealing performance between the sealing ring 65 and the sealing cylinder 612.

The right end of the sealing ring 65 is provided with a circular groove, and a rubber leather ring is fixedly arranged in the groove.

Wherein, the rubber leather collar that sets up can improve the leakproofness of whole device to the annular groove has been seted up to sealing ring 65 right-hand member and the thickness of recess is the same with the thickness of sealed section of thick bamboo 612, and sealed effect is better when using like this.

The sealing cylinder 612 is located inside the sealing ring 65, and the sealing sleeve 69 is sleeved outside the sealing ring 65 and provided with a circular arc radian.

Further, the sealing sleeve 69 is provided with a circular arc radian to facilitate the propulsion of the air flow, and the sealing effect is better when the sealing sleeve covers the outer part of the sealing ring 65.

The right end of the rotating shaft 61 penetrates the mounting ring 66 and the mounting tube 67 and is not in contact with both the mounting ring 66 and the mounting tube 67.

Further, neither the mounting ring 66 nor the mounting tube 67 contact ensures proper rotation of the rotating shaft 61.

The ventilation assembly 5 comprises a fan shell 51, a ventilation pipe 52 communicated with an inner cavity of the fan shell 51 is fixedly mounted on the front portion of the outer surface of the fan shell 51, a sealing ring 53 is fixedly mounted at the upper end of the ventilation pipe 52, a connecting block 56 is fixedly mounted on the upper portion of the outer surface of the fan shell 51, a connecting pipe 57 is fixedly mounted at the upper end of the connecting block 56, a fan 58 is fixedly mounted at the right end of the connecting pipe 57, a connecting plate 54 is fixedly mounted at the rear portion of the outer surface of the fan shell 51, a hollow pipe 55 is fixedly mounted at the rear end of the connecting plate 54, an air inlet cover 8 is fixedly.

As shown in fig. 5 and 6, air enters the inside of the fan case 51 through the air inlet cover 8 and then is discharged through the ventilation pipe 52, since air enters from the air inlet cover 8 rapidly, air passes through the inside of the hollow pipe 55 at the center of the air inlet cover 8 in the right end of the hollow pipe 55, and air flow is generated to take away heat emitted by the driving motor 1 due to long-term use by the air inlet at the left end of the hollow pipe 55 further away from the driving motor 1.

The rotating shaft 61 is fixedly connected with the rotating shaft at the output end of the driving motor 1, and the mounting plate 62 is fixedly mounted at the left end of the fan shell 51.

Wherein, mounting panel 62 mainly plays the effect of a pivot of stabilizing driving motor 1 output, prevents that driving motor 1 from driving fan blade 7 when rotating unstably.

The left ends of the connecting pipe 57 and the hollow pipe 55 are both provided with a certain radian towards the driving motor 1, and the right part of the hollow pipe 55 is provided with a ninety-degree included angle towards the center of the air inlet cover 8.

Further, the connection pipe 57 and the hollow pipe 55 can be made to radiate heat to the driving motor 1, thereby increasing the heat efficiency of the driving motor 1.

It should be noted that, the present invention is a sealing device between a centrifugal fan casing and a shaft, when in use, a driving motor 1 drives a rotating shaft 61 to rotate, a bearing 64 inside a circular hole 63 supports the rotating shaft 61 to rotate stably, the rotating shaft 61 rotates to drive a fan blade 7 to rotate inside a fan casing 51, air can enter the fan casing 51 through an air inlet cover 8 and then be discharged through a ventilation pipe 52, because the air can enter from the air inlet cover 8 quickly, the center of the air inlet cover 8 inside the right end of a hollow pipe 55 can have the air passing through the inside of the hollow pipe 55, the position of an air inlet at the left end of the hollow pipe 55 from the driving motor 1 can generate an air flow to take away heat emitted by the driving motor 1 due to long-time use, the fan 58 can send the air into a connecting pipe 57 to radiate the driving motor 1, thereby increasing the heat radiation efficiency of the driving motor 1, the fan blade 7 in the fan housing 51 generates a large amount of air flow inside when rotating, some air is discharged through the gap between the bearing 64 and the fan housing 51, the air flow with strength when air passes through the gap between the bearing 64 and the fan housing 51 pushes the baffle 611 to press the spring 68 on the outer surface of the mounting tube 67, so that the sealing sleeve 612 is pressed into the sealing ring 65, and the sealing sleeve 69 increases the sealing performance between the sealing ring 65 and the sealing sleeve 612.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. 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 invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a sealing device between centrifugal fan casing and axle, includes driving motor (1), its characterized in that: the fan is characterized in that a base (2) is fixedly mounted at the lower end of the driving motor (1), a support frame (3) is fixedly mounted at the lower end of the base (2), a support seat (4) is fixedly mounted at the right end of the support frame (3), a ventilation assembly (5) is fixedly mounted at the upper end of the support seat (4), an air inlet cover (8) is fixedly mounted at the right end of the ventilation assembly (5), a sealing assembly (6) is fixedly mounted at the left end of the ventilation assembly (5), and a fan blade (7) is fixedly mounted at the right end of the sealing assembly (6) in the ventilation assembly (5);

the sealing assembly (6) comprises a mounting plate (62), a left end center of the mounting plate (62) is provided with a round hole (63) penetrating through the left and right, a bearing (64) is fixedly mounted inside the round hole (63), a rotating shaft (61) is fixedly mounted inside the bearing (64), the right end of the rotating shaft (61) is fixedly connected with a fan blade (7), a sealing ring (65) is sleeved on the outer surface of the bearing (64), the sealing ring (65) is fixedly mounted at the right end of the mounting plate (62), a mounting ring (66) is fixedly mounted at the right end of the bearing (64), a mounting pipe (67) is fixedly mounted at the right end of the mounting ring (66), a spring (68) and a baffle sheet (611) are sleeved on the outer surface of the mounting pipe (67), one end of the spring (68) is fixedly connected with the mounting ring (66), and the other end of the spring (68) is fixedly connected with the baffle, and a sealing cylinder (612) and a sealing sleeve (69) are fixedly mounted at the left end of the baffle plate (611).

2. A seal arrangement between a centrifugal fan casing and a shaft according to claim 1, wherein: the right end of the sealing ring (65) is provided with a circular groove, and a rubber leather ring is fixedly arranged in the groove.

3. A seal arrangement between a centrifugal fan casing and a shaft according to claim 2, wherein: the sealing sleeve (612) is located inside the sealing ring (65), and the sealing sleeve (69) is sleeved outside the sealing ring (65) and provided with an arc radian.

4. A seal arrangement between a centrifugal fan casing and a shaft according to claim 3, wherein: the right end of the rotating shaft (61) penetrates through the mounting ring (66) and the mounting pipe (67) and is not in contact with the mounting ring (66) and the mounting pipe (67).

5. A seal arrangement between a centrifugal fan casing and a shaft according to claim 1, wherein: ventilation subassembly (5) include fan shell (51), fan shell (51) surface front portion fixed mounting have with fan shell (51) inner chamber ventilation pipe (52) that link up each other, the upper end fixed mounting of ventilation pipe (52) has sealing washer (53), the surface upper portion fixed mounting of fan shell (51) has connecting block (56), the upper end fixed mounting of connecting block (56) has connecting pipe (57), the right-hand member fixed mounting of connecting pipe (57) has fan (58), the surface rear portion fixed mounting of fan shell (51) has connecting plate (54), the rear end fixed mounting of connecting plate (54) has hollow tube (55), the right-hand member fixed mounting of fan shell (51) has air inlet cover (8), fan shell (51) fixed mounting is in the upper end of supporting seat (4).

6. A seal arrangement between a centrifugal fan casing and a shaft according to claim 4 or 5, wherein: the rotating shaft (61) is fixedly connected with a rotating shaft at the output end of the driving motor (1), and the mounting plate (62) is fixedly mounted at the left end of the fan shell (51).

7. A seal arrangement between a centrifugal fan casing and a shaft according to claim 5, wherein: the left ends of the connecting pipe (57) and the hollow pipe (55) are both provided with a certain radian towards the driving motor (1), and the right part of the hollow pipe (55) is provided with a ninety-degree included angle towards the center of the air inlet cover (8).