CN218000401U

CN218000401U - Novel sealing structure of powder concentrator

Info

Publication number: CN218000401U
Application number: CN202221796769.5U
Authority: CN
Inventors: 张少华; 张陆克; 张宇青
Original assignee: Shanghai Clirik Machinery Co ltd
Current assignee: Shanghai Clirik Machinery Co ltd
Priority date: 2022-07-13
Filing date: 2022-07-13
Publication date: 2022-12-09
Anticipated expiration: 2032-07-13

Abstract

The utility model discloses a novel selection powder machine seal structure belongs to selection powder machine technical field. It includes organism, main shaft and bearing frame, the main shaft passes the bearing frame, the part cover that the main shaft is located the bearing frame is equipped with bearing, polytetrafluoroethylene sealed pad and axle sleeve, the axle sleeve is hugged closely with the bearing, polytetrafluoroethylene sealed pad is located between bearing and the axle sleeve, form labyrinth seal between axle sleeve and the bearing frame. The utility model has the advantages that through the double-layer sealing arrangement, the sealed medium generates the throttling effect when passing through the clearance of the zigzag labyrinth to achieve the purpose of leakage resistance, thereby playing a great blocking role on fine powder, playing a first layer of protection role and being used as a front seal; the polytetrafluoroethylene sealing gasket is used for second layer sealing protection, double insurance guarantees that fine powder cannot enter the inside of the bearing, the good running working state of the bearing is protected, meanwhile, lubricating grease is prevented from leaking from the bearing part, the sealing effect is good, and the structure is simple.

Description

Novel powder concentrator seal structure

Technical Field

The utility model relates to a novel selection powder machine seal structure belongs to selection powder machine technical field.

Background

Centrifugal selection powder machine is along with the inside air of the continuous suction equipment of high pressure positive blower, and the air of material along with constantly entering after the multilayer is smashed is brought into the selection powder machine, and the sealed of impeller department bearing of high-speed rotation is especially important, and now more common is that the oil blanket is sealed or O type circle is sealed, but here because high-speed rotation and position are narrow and small for the temperature of this department is higher, makes the easy adhesion of conventional sealing, physical properties unstable, thereby influences sealed effect.

Disclosure of Invention

The utility model aims to solve the technical problem that: the utility model provides a novel powder concentrator seal structure, it has solved the unstable physical properties of conventional single seal structure to influence the problem of sealed effect.

The utility model discloses the technical problem that will solve takes following technical scheme to realize:

the utility model provides a novel selection powder machine seal structure, includes organism, main shaft and bearing frame, the main shaft passes the bearing frame, the part cover that the main shaft is located the bearing frame is equipped with bearing, polytetrafluoroethylene sealed pad and axle sleeve, the axle sleeve is hugged closely with the bearing, polytetrafluoroethylene sealed pad is located between bearing and the axle sleeve, form labyrinth seal between axle sleeve and the bearing frame.

As a preferred example, the labyrinth seal includes a plurality of annular seal grooves arranged in series around the outer circumference of the sleeve.

As a preferred example, at least three annular seal grooves are provided.

As a preferable example, the outer circumference of the sleeve is provided with a step, and the teflon packing is provided at the step.

As a preferred example, the polytetrafluoroethylene gasket is provided with two layers.

The utility model has the advantages that: the utility model has the advantages that through the double-layer sealing arrangement, the sealed medium generates the throttling effect when passing through the clearance of the zigzag labyrinth to achieve the purpose of leakage resistance, the sealed medium does not need lubrication, allows thermal expansion, is suitable for the occasions of impeller rotation at high rotation speed, plays a great blocking role on fine powder, plays a first layer of protection role and serves as preposed sealing; the polytetrafluoroethylene sealing gasket is used for second layer sealing protection, so that double insurance guarantees that fine powder cannot enter the interior of the bearing, the good running working state of the bearing is protected, lubricating grease is prevented from leaking from the bearing part, the sealing effect is good, and the structure is simple.

Drawings

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

FIG. 2 is a schematic view of the structure of portion A of FIG. 1;

fig. 3 is a schematic structural view of the bushing.

In the figure: the bearing comprises a bearing 1, a polytetrafluoroethylene sealing gasket 2, a shaft sleeve 3, an annular sealing groove 31, a step 32, an impeller 4 and a main shaft 5.

Detailed Description

In order to make the technical means, the creation features, the achievement purposes and the functions of the present invention easy to understand and understand, the present invention is further explained by combining the following specific drawings.

As shown in fig. 1-3, a novel sealing structure of a powder concentrator comprises a machine body, a main shaft 5 and a bearing seat 6, wherein the main shaft 5 penetrates through the bearing seat 6, a part of the main shaft 5, which is positioned in the bearing seat 6, is sleeved with a bearing 1, a polytetrafluoroethylene sealing gasket 2 and a shaft sleeve 3, the outer periphery of the bearing 1 is tightly matched with the bearing seat 6 to limit the position of the bearing 1, and the end part of the shaft sleeve 3 is tightly attached to the end part of the bearing 1, so that the polytetrafluoroethylene sealing gasket 2 is positioned between the bearing 1 and the shaft sleeve 3 to perform secondary sealing, specifically, the outer periphery of the shaft sleeve 3 is provided with a step 32, the polytetrafluoroethylene sealing gasket 2 is sleeved at the step 32, and the polytetrafluoroethylene sealing gasket 2 is provided with two layers, so that the polytetrafluoroethylene sealing gasket 2 used by the inventor has high corrosion resistance, stable physical properties, high lubrication, non-adhesion, high and low temperature resistance and the like, thereby achieving good sealing performance and preventing lubricating grease from leaking from a bearing part;

a labyrinth seal is formed between the shaft sleeve 3 and the bearing seat 6, a plurality of annular seal grooves 31 are sequentially arranged on the periphery of the shaft sleeve 3, in practical application, the number of the annular seal grooves 31 is preferably four, the sealing effect is achieved, the size of the shaft sleeve 3 can be reduced, and the bearing seat is suitable for installation in narrow places; in the labyrinth seal, the sealed medium generates throttling effect when passing through the gaps of the zigzag sections of the annular seal grooves 31 to achieve the purpose of leakage resistance, and the labyrinth seal does not need lubrication, allows thermal expansion and is suitable for the occasions of high-speed impeller rotation.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that various changes and modifications may be made without departing from the spirit and scope of the invention, and such changes and modifications fall within the scope of the claimed invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a novel selection powder machine seal structure, includes organism, main shaft (5) and bearing frame (6), its characterized in that are passed in main shaft (5): the part cover that main shaft (5) are located bearing frame (6) is equipped with bearing (1), polytetrafluoroethylene sealed pad (2) and axle sleeve (3), axle sleeve (3) are hugged closely with bearing (1), polytetrafluoroethylene sealed pad (2) are located between bearing (1) and axle sleeve (3), form labyrinth seal between axle sleeve (3) and bearing frame (6).

2. The novel sealing structure of the powder concentrator as claimed in claim 1, wherein: the labyrinth seal comprises a plurality of annular seal grooves (31) which are arranged in sequence and are arranged on the periphery of the shaft sleeve (3).

3. The novel sealing structure of the powder concentrator according to claim 2, characterized in that: the annular sealing grooves (31) are at least three.

4. The novel sealing structure of the powder concentrator according to claim 1, characterized in that: the periphery of the shaft sleeve (3) is provided with a step (32), and the polytetrafluoroethylene sealing gasket (2) is arranged at the step (32).

5. The novel sealing structure of the powder concentrator as claimed in claim 4, wherein: the polytetrafluoroethylene sealing gasket (2) is provided with two layers.