CN219139449U

CN219139449U - Novel draught fan carbon ring sealing structure

Info

Publication number: CN219139449U
Application number: CN202320262130.7U
Authority: CN
Inventors: 余波; 张益�; 罗涛; 刘毅; 谢锡彬
Original assignee: Chengdu Huayi Saier Technology Co ltd
Current assignee: Chengdu Huayi Saier Technology Co ltd
Priority date: 2023-02-20
Filing date: 2023-02-20
Publication date: 2023-06-06
Anticipated expiration: 2033-02-20

Abstract

The utility model relates to a novel draught fan carbon ring sealing structure, which comprises an annular shaft sleeve, a sealing ring and a plurality of carbon rings, wherein the sealing ring is in a circular ring shape, a plurality of annular grooves are formed in an inner ring of the sealing ring at intervals, the carbon rings are installed in the annular grooves in a one-to-one correspondence manner, the inner ring of the carbon ring protrudes out of the annular grooves and is abutted to the outer surface of the annular shaft sleeve, an elastic piece is arranged between the carbon rings and the bottoms of the annular grooves, an air inlet channel is arranged between the two annular grooves, a sealing cavity is formed in the inner side of the sealing ring, and the air inlet channel is communicated with the sealing cavity. The elastic piece is utilized to tightly press the carbocycle on the annular shaft sleeve, so that the gap between the carbocycle and the annular shaft sleeve is reduced, the integral tightness of the carbocycle is improved, and gas leakage is prevented.

Description

Novel draught fan carbon ring sealing structure

Technical Field

The utility model relates to the technical field of sealing structures, in particular to a novel draught fan carbon ring sealing structure.

Background

Centrifugal fans are widely used for ventilation of factories, mines, tunnels, cooling towers, vehicles, ships and buildings, ventilation and induced air of boilers and industrial kilns, cooling and ventilation in air-conditioning equipment and household electrical appliances, drying and selection of grains, which all represent the importance of centrifugal fans. When the fan is applied to conveying toxic gases such as coal gas, the requirement on the tightness of the fan is high, the existing mode is to add a carbocycle in the fan transmission shaft sealing ring for sealing, and when the fan is assembled, the diameter of the carbocycle inner ring is slightly larger than the outer diameter of the transmission shaft sleeve in order to facilitate the assembly, so that a certain gap of about 0.05-0.1 mm exists between the carbocycle and the shaft sleeve, the tightness of the carbocycle can be reduced, and the coal gas leakage is caused, and therefore, improvement is needed.

Disclosure of Invention

Based on this, it is necessary to provide a novel blower carbon ring sealing structure in view of the above problems.

Novel fan carbocycle seal structure, including annular axle sleeve, still including sealing ring and a plurality of carbocycle, the sealing ring is the ring form, sealing ring inner circle interval is provided with a plurality of annular, and is a plurality of carbocycle one-to-one is installed in the annular, carbocycle's inner circle protrusion the annular, with annular axle sleeve surface butt, the carbocycle with be provided with the elastic component between the tank bottom of annular, two be provided with the inlet channel between the annular, the sealing ring inboard is provided with sealed chamber, inlet channel is the intercommunication with sealed chamber.

Preferably, the outer surface of the annular shaft sleeve is provided with a coating.

Preferably, the coating is aluminum oxide.

Preferably, the outer ring of the carbocycle is provided with a mounting groove with a U-shaped cross section, and the end part of the elastic piece is clamped in the mounting groove.

Preferably, the inner ring edge parts of the plurality of carbon rings facing the inner side surface of the sealing ring are all provided with chamfer angles.

Preferably, the carbocycle is uniformly provided with a plurality of lightening holes along the circumference thereof.

Preferably, a steel sleeve is arranged on the outer side surface of the sealing ring, and the inner ring of the steel sleeve is movably abutted with the outer ring of the annular shaft sleeve.

The utility model has the advantages that: the elastic piece is utilized to tightly press the carbocycle on the annular shaft sleeve, so that the gap between the carbocycle and the annular shaft sleeve is reduced, the integral tightness of the carbocycle is improved, and gas leakage is prevented.

Drawings

FIG. 1 is a schematic perspective view of a novel blower carbon ring seal structure in accordance with one embodiment;

FIG. 2 is a schematic cross-sectional view of a novel blower carbon ring seal configuration;

FIG. 3 is a schematic perspective view of a carbocyclic ring.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1-3, the novel draught fan carbon ring sealing structure comprises an annular shaft sleeve 100, and further comprises a sealing ring 1 and a plurality of carbon rings 2, wherein the sealing ring 1 is in a circular ring shape, a plurality of annular grooves 11 are arranged at intervals in the inner ring of the sealing ring 1, the carbon rings 2 are installed in the annular grooves 11 in a one-to-one correspondence manner, the inner rings of the carbon rings 2 protrude out of the annular grooves 11 and are abutted against the outer surface of the annular shaft sleeve 100, an elastic piece 3 is arranged between the carbon rings 2 and the bottoms of the annular grooves 11, an air inlet channel 12 is arranged between the two annular grooves 11, a sealing cavity 13 is arranged on the inner side of the sealing ring 1, and the air inlet channel 12 is communicated with the sealing cavity 13. Specifically, the elastic component 3 has been added to this design between original carbocycle 2 and sealing ring 1, when the carbocycle 2 cover that the transversal rectangle of personally submitting is established on annular axle sleeve 100, elastic component 3 is in compression state this moment, utilizes the elastic force that elastic component 3 provided, tightly sticiss carbocycle 2 on annular axle sleeve 100 for clearance between carbocycle 2 and the annular axle sleeve 100 reduces, can remain in 0.01 ~ 0.06 mm's interval all the time, very big improvement carbocycle 2's whole leakproofness. Further, in order to improve the sealing of toxic medium gases such as coal gas, the carbon ring sealing sometimes needs to be added with isolation gas, in the technical scheme, the air inlet channel 12 is arranged on the sealing ring 1 and used for introducing nitrogen, the nitrogen is used as isolation, toxic inflammable media can be sealed in an isolated mode, the nitrogen consumption can be controlled to be 25-40 m < 3 >/h, meanwhile, the sealing cavity 13 is annular, and when the nitrogen enters the sealing cavity 13, clean fluid dynamic pressure is always kept between parallel sealing surfaces according to a Reynolds equation, so that the fluid dynamic pressure is completely balanced with static pressure and carbon ring 2, and the fluid dynamic pressure is completely balanced with an ultrathin air film generated by sealing surfaces of a plurality of carbon rings 2, so that the sealing is more reasonable and perfect, the stability of the carbon rings 2 is maintained, and the sealing effect is improved.

As shown in fig. 1-2, the outer surface of the annular sleeve 100 is provided with a coating 101, so that the annular sleeve 100 is more wear-resistant, and in this embodiment, the coating 101 is aluminum oxide.

As shown in fig. 3, the outer ring of the carbocycle 2 is provided with a mounting groove 21 with a U-shaped cross section, and the end part of the elastic member 3 is clamped in the mounting groove 21, so that dislocation is avoided, and the consistency of the elastic force of the elastic member 3 received by the outer ring of the carbocycle 2 is ensured.

As shown in fig. 3, a plurality of inner ring edge parts of the inner side surfaces of the carbocycles 2 facing the sealing ring 1 are respectively provided with an oblique chamfer 22, when an operator is sleeved on the annular shaft sleeve 100, one side, provided with the oblique chamfer 22, of the carbocycles 2 is right opposite to the annular shaft sleeve 100, so that the carbocycles 1 are conveniently sleeved on the annular shaft sleeve 100, collision between the inner rings of the carbocycles 2 and the end parts of the annular shaft sleeve 100 is avoided, and the assembly is more convenient.

As shown in FIG. 3, the carbocycle 2 is uniformly provided with a plurality of lightening holes 23 along the circumferential direction thereof, the overall weight of the carbocycle 2 is lightened, the carbocycle 2 has better floatability, the carbocycle 2 with large size can be prevented from being influenced by gravity, and the deviation leads to excessive abrasion of the carbocycle 2.

As shown in fig. 1-2, the outer side surface of the sealing ring 1 is provided with a steel sleeve 14, the inner ring of the steel sleeve 14 is movably abutted with the outer ring of the annular shaft sleeve 100, the outer end part of the sealing ring 1 is protected, and external dust and the like are prevented from entering the sealing ring 1.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims

1. Novel fan carbocycle seal structure, including annular axle sleeve, its characterized in that: still including sealing ring and a plurality of carbocycle, the sealing ring is the ring form, sealing ring inner race interval is provided with a plurality of annular, and a plurality of carbocycle one-to-one is installed in the annular, the inner race protrusion of carbocycle the annular, with annular axle sleeve surface butt, the carbocycle with be provided with the elastic component between the tank bottom of annular, two be provided with the inlet channel between the annular, the sealing ring inboard is provided with sealed chamber, inlet channel is the intercommunication with sealed chamber.

2. The novel blower carbocyclic seal of claim 1, wherein: the outer surface of the annular shaft sleeve is provided with a coating.

3. The novel blower carbocyclic seal of claim 2, wherein: the coating is aluminum oxide.

4. The novel blower carbocyclic seal of claim 1, wherein: the outer ring of carbocycle is provided with the mounting groove that the transversal U of personally submitting, elastic component tip joint is in the mounting groove.

5. The novel blower carbocyclic seal of claim 4, wherein: and bevel angles are arranged at the inner ring edge parts of the plurality of carbon rings facing the inner side surface of the sealing ring.

6. The novel blower carbocyclic seal of claim 5, wherein: the carbocycle is provided with a plurality of lightening holes evenly along its circumference.

7. The novel blower carbocyclic seal of claim 1, wherein: the steel sleeve is arranged on the outer side face of the sealing ring, and the inner ring of the steel sleeve is movably abutted with the outer ring of the annular shaft sleeve.