CN215596408U - Shaft seal device of powder mixer - Google Patents
Shaft seal device of powder mixer Download PDFInfo
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- CN215596408U CN215596408U CN202121748066.0U CN202121748066U CN215596408U CN 215596408 U CN215596408 U CN 215596408U CN 202121748066 U CN202121748066 U CN 202121748066U CN 215596408 U CN215596408 U CN 215596408U
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- oil
- seal
- rotating shaft
- shaft
- oil seal
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Sealing Of Bearings (AREA)
- Sealing Devices (AREA)
Abstract
The utility model discloses a shaft seal device of a powder mixer. The part of the oil seal piece, which is contacted with the rotating shaft, is provided with a circle of oil seal groove around the rotating shaft; an electric heating element contacting with the oil is inserted into the oil seal groove, so that the oil is heated conveniently. The ointment is heated by the electric heating element, so that the safety is high, no oil leakage occurs during non-working, the temperature is quickly raised during working, and the double effects of lubricating the rotating shaft and reliably sealing are achieved.
Description
Technical Field
The present invention relates to a shaft seal device of a machine.
Background
The shaft is a friction seal or stuffing box to prevent fluid leakage between the shaft and bearings of the compressor or other fluid handling equipment, and is also a sealing device provided to prevent leakage between the pump shaft and the housing. The common shaft seal types include packing seal, mechanical seal and dynamic seal, and labyrinth seal with complex shape and O-shaped seal with simple shape.
The packing sealing structure is simple, low in price and convenient to maintain. But the leakage amount is large and the power loss is large. The packing seal is therefore used for transporting common media, such as water and the like; generally not applicable to petroleum and chemical media, in particular not applicable to expensive, explosive and toxic media.
The mechanical seal (also called end face seal) has good sealing effect, small leakage amount, long service life, but high price, and higher requirements on processing, installation, maintenance and repair than the common seal. The mechanical seal is suitable for conveying petroleum and chemical media, and can be used for various media with different viscosities, strong corrosiveness and containing particles. The American Petroleum institute Standard API610 (8 th edition) specifies: the cartridge type mechanical seal should be equipped except for the user's regulations.
The labyrinth seal is that several ring seal teeth are arranged around the rotating shaft, a series of cut-off gaps and expansion cavities are formed between teeth, and the sealed medium produces throttling effect when passing through the gaps of the zigzag labyrinth, so as to achieve the purpose of leakage resistance.
The dynamic seal can be divided into a back vane type seal and an auxiliary impeller seal. When the pump works, the centrifugal force action of the back-rest blades (or the auxiliary impeller) reduces the medium pressure at the shaft seal to the normal pressure or negative pressure state, so that the pump does not leak in the use process. When the vehicle is stopped, the centrifugal force disappears, the sealing function of the back blade (or the auxiliary impeller) fails, and the sealing function is realized by the parking sealing device.
When the powder materials such as phenyl guanidine and the like are processed by adopting a traditional mixer, the sealing effect of the packing sealing element adopted by the shaft seal is poor, and the materials are frequently leaked. If an oil seal is adopted, when powder leaks, the oil becomes viscous, the fluidity and the lubricity are reduced, and the rotation resistance of a shaft and a bearing is increased.
Disclosure of Invention
Utility model purpose:
provides a shaft seal device of a powder mixer with good powder sealing effect and small rotation resistance.
The technical scheme is as follows:
the utility model relates to a shaft seal device of a powder mixer, which is mainly applied to sealing of solid powder by referring to a pump oil seal (liquid seal) on the basis of labyrinth seal and adopts a combined seal structure.
After the rotating shaft penetrates through the mixer shell, a labyrinth sealing element (or an excessive sealing ring or a check ring which is connected with the labyrinth sealing element or an oil seal by a fastening element), an oil seal element and a bearing are sequentially sleeved on the rotating shaft. The labyrinth sealing element and the oil seal sealing ring are combined and sealed, so that the sealing performance is enhanced.
The labyrinth seal who is close powder in the blender simultaneously can hold the powder of a small amount of leakages, and the powder can not directly get into oil seal spare, leads to the oil of oil blanket to be polluted the degradation.
The part of the oil seal piece contacting with the rotating shaft is provided with a circle of hollow holes (oil seal grooves) around the rotating shaft, and oil (liquid or viscous state) is stored in the hollow holes. Preferably, the oil seal sealing ring is made of insulating materials (plastics or ceramics), an electric heating element (so as to be electrified and heated by an external power supply) contacting oil is inserted into the hollow hole, the oil is heated conveniently, the oil is kept in a liquid state when needed, and the oil seal sealing ring has lubricating property and sealing property of an oil seal.
The oil is preferably high-temperature-resistant conductive ointment (such as beef tallow, which can lubricate the rotating shaft or the adjacent bearing at normal temperature, and can be used as an oil seal after being heated and melted). During the non-working period of the combined sealing structure, the electric heating element is not electrified for heating, so that the ointment keeps a viscous flow state and is not easy to leak.
When the lubricating device works, the electric heating element is electrified, so that the factice is heated and liquefied, and the function of lubricating the rotating shaft is realized. And the oil seal is heated to expand, and the effect of the oil seal is better than that of the conventional normal-temperature oil seal due to the increase of pressure.
Has the advantages that:
the powdered material, after flowing, slowly permeates from the shaft labyrinth seal. After adding one oil seal, the material is sealed doubly, so that basically no leakage exists. Reduce the leakage of dust of substances such as phenylguanidine and the like, solve the problem of leakage and improve the environment of a production site.
Especially, the conductive factice is used as oil for oil seal, is not easy to leak when not in work, and has less oil consumption. The multifunctional electric heating sealing device has multiple functions of conducting, heating, liquefying, lubricating and sealing during working.
The mode of electric heating element heating conductive ointment for the security is high, and non-during-operation oil-tight, during operation rapid heating reaches lubricated sealed good effect.
Drawings
FIG. 1 is a schematic view of a one-week cross-sectional structure of the present application;
in the drawings, 1-axis of rotation; 2-a labyrinth seal; 3-a retainer ring; 4-oil seal; 5-an electric heating element; 6-oil material; 7-a bearing; 9-fastening piece.
Detailed Description
As shown in fig. 1, in the shaft seal device of the powder mixer, a labyrinth seal, a transition seal ring, an oil seal and a bearing are sequentially sleeved on a rotating shaft, a circle of hollow oil seal groove around the rotating shaft is arranged at the contact part of the oil seal and the rotating shaft, and liquid or viscous-state oil is stored in a hollow space; the oil seal sealing ring is made of ceramics; the oil is high temperature resistant conductive paste, and the electric heating element is inserted into the conductive paste and connected with an external circuit, so that the oil can be quickly liquefied when needed, and a reliable oil seal piece is formed.
Claims (3)
1. A shaft seal device of a powder mixer is characterized in that after a rotating shaft penetrates through a mixer shell, a labyrinth seal, an oil seal and a bearing are sequentially sleeved on the rotating shaft, a circle of hollow oil seal grooves around the rotating shaft are formed in the positions, in contact with the rotating shaft, of the oil seal, and liquid or viscous-state oil is stored in each hollow; the method is characterized in that: the oil seal sealing ring is made of plastics or ceramics, an electric heating element which is contacted with oil and is convenient to be connected with an external power supply is inserted into the hollow hole, and the oil is high-temperature resistant ointment.
2. The shaft seal device for powder compounder of claim 1, wherein: and an excessive sealing ring or a check ring is arranged between the labyrinth sealing piece and the oil sealing piece.
3. The shaft seal device for powder compounder of claim 1 or 2, characterized in that: the oil material is beef tallow.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121748066.0U CN215596408U (en) | 2021-07-29 | 2021-07-29 | Shaft seal device of powder mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121748066.0U CN215596408U (en) | 2021-07-29 | 2021-07-29 | Shaft seal device of powder mixer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215596408U true CN215596408U (en) | 2022-01-21 |
Family
ID=79879468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121748066.0U Active CN215596408U (en) | 2021-07-29 | 2021-07-29 | Shaft seal device of powder mixer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215596408U (en) |
-
2021
- 2021-07-29 CN CN202121748066.0U patent/CN215596408U/en active Active
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