CN219452887U - Dry gas sealing device for dryer in food and medicine industry - Google Patents
Dry gas sealing device for dryer in food and medicine industry Download PDFInfo
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- CN219452887U CN219452887U CN202223452961.5U CN202223452961U CN219452887U CN 219452887 U CN219452887 U CN 219452887U CN 202223452961 U CN202223452961 U CN 202223452961U CN 219452887 U CN219452887 U CN 219452887U
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- medium side
- bearing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
Abstract
The utility model provides a dry gas sealing device for a dryer in the food and medicine industry, which comprises: the device comprises a shaft sleeve, a medium side movable ring, a medium side stationary ring, an atmosphere side movable ring, an atmosphere side stationary ring, a flange plate, an auxiliary shaft sleeve, a cavity, a spring seat, a bearing gland, a bearing, an oil seal and a shaft holder; the medium side sealing dynamic and static ring and the atmosphere side sealing dynamic and static ring form a double-end-face dry air seal, and zero leakage of the medium is realized by utilizing the sealing air pressure which is higher than the medium pressure by more than 0.2 MPa; the medium side sealing dynamic and static ring adopts a hard-to-hard assembly mode, so that the generation of graphite powder under the extreme abnormal condition is stopped, and the possibility of medium pollution is avoided; the medium side sealing structure is of an internal pressure type, namely the internal pressure is higher than the external pressure, so that the requirements of SIP and CIP in the food and medicine industry are met; dead zones are avoided from being formed between the medium side movable ring and the shaft sleeve as well as between the medium side static ring and the flange plate.
Description
Technical Field
The utility model relates to the field of food and medical instrument sealing, in particular to a dry gas sealing device for a dryer in the food and medical industry.
Background
The dryer in the food and medicine industry is usually low-speed low-pressure equipment, and the quality requirement on the final product of medium materials is very high, so the quality requirement on sealing is also very high, on one hand, the materials are required not to leak outside, on the other hand, the medium materials are required not to be polluted, and no mature product is applied in China at present. The traditional mechanical seal sealing liquid can pollute the medium materials, graphite powder generated by abrasion also can pollute the medium materials, the conventional dry gas seal can solve the possibility of pollution of the sealing liquid to the medium materials, but the graphite powder generated by end face abrasion also can pollute the medium materials, and the traditional dry gas seal or mechanical seal cannot meet the requirements of on-line sterilization and on-line flushing.
The dryer in the food and medicine industry needs to be started and stopped frequently, and has high requirement on leakage amount, and the traditional dry gas seal can not meet the requirement of equipment on frequent start and stop and can not effectively reduce the leakage amount.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present utility model is to provide a dry gas sealing device for a dryer in the food and pharmaceutical industry.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
a dry gas sealing device for a dryer in the food and pharmaceutical industry, comprising: the device comprises a shaft sleeve 1, a medium side movable ring 2, a medium side static ring 3, an atmosphere side movable ring 4, an atmosphere side static ring 5, a flange 6, a countershaft sleeve 7, a cavity 8, a spring seat 9, a bearing seat 10, a bearing gland 11, a bearing 12 and an oil seal 13;
the shaft sleeve 1 is fixed on a main shaft of the dryer, and the main shaft of the dryer drives the shaft sleeve 1 to rotate;
the medium side movable ring 2 is fixed at one end of the shaft sleeve 1 close to a medium;
the medium side static ring 3 is positioned at one side of the medium side moving ring 2 far away from the medium and forms a friction pair of medium side sealing with the medium side moving ring 2, and the medium side static ring is positioned right above the medium side moving ring in normal operation;
the medium side stationary ring 3 is connected inside the flange plate 6 in a sliding way;
the auxiliary shaft sleeve 7 is fixed on the outer surface of the shaft sleeve 1 far away from the main shaft of the dryer;
the spring seat 9 is fixed on the auxiliary shaft sleeve 7 between the flange plate 6 and the atmospheric static ring 5;
the atmosphere side moving ring 4 is positioned in the spring seat 9, and the spring seat drives the atmosphere side moving ring 4 to rotate together with the spring seat 9 and simultaneously move up and down along with the spring in the spring seat 9;
the atmosphere static ring 5 is positioned on one side of the atmosphere moving ring 4 away from the medium and forms an atmosphere sealed friction pair with the atmosphere moving ring 4;
the atmospheric static ring 5 is fixed on the bearing seat 10; the inner ring of a bearing 12 of the bearing seat 10 is fixed on the shaft sleeve 1, and the outer ring of the bearing is fixed on the bearing seat 10;
the bearing cover 11 fixes the bearing 12 on the bearing seat 10;
the oil seals 13 are respectively sealed between the bearing seat 10 and the auxiliary shaft sleeve 7, and between the bearing gland 11 and the shaft sleeve 1;
along the direction from the medium side to the atmosphere side, the flange 6 is connected with the cavity 8, the bearing seat 10 and the bearing cover 11 in sequence to form a whole sealed shell.
Preferably, the shaft sleeve 1 is fixed on the main shaft of the dryer through the shaft clip 14 and rotates along with the main shaft of the dryer;
preferably, the flange 6 is connected with the cavity 8, the bearing seat 10 and the bearing cover 11 in sequence, and the whole sealed shell is formed by screw connection.
Preferably, the medium side moving ring 2 or the medium side stationary ring 3 is provided with hydrodynamic grooves, and when the seal is in normal operation, the end face forms a gas film under the action of the hydrodynamic grooves, and the moving ring and the stationary ring are in non-contact operation.
Preferably, the atmospheric stationary ring 5 is provided with hydrodynamic grooves, and when the seal is in normal operation, the end face forms a gas film under the action of the hydrodynamic grooves, and the movable ring and the stationary ring are in non-contact operation.
As a preferable mode, the medium side movable ring 2 and the medium side static ring 3 are made of silicon carbide, and a wear-resistant coating is sprayed on one ring surface, so that the wear resistance and self-lubricity of the seal under abnormal conditions are improved.
Preferably, the coaxiality of the sealing rotating piece and the sealing static piece is maintained through the bearing 12, so that the deflection of the shaft sleeve 1 is prevented from affecting the normal operation of the sealing. The working process of the utility model is as follows: the main shaft of the drier drives the shaft sleeve 1 to rotate together; the medium side movable ring 2 is driven to rotate along with the shaft sleeve, and the medium side static ring 3 and the medium side movable ring 2 form a friction pair for medium side sealing, so that the main sealing effect is achieved, and medium leakage is prevented; the medium side stationary ring 3 is positioned in the flange of the piece 6 and can slide up and down freely in the flange; the auxiliary shaft sleeve 7 is fixed on the shaft sleeve of the member 1 and rotates together with the shaft sleeve; the spring seat 9 is fixed on the auxiliary shaft sleeve of the piece 7 and rotates together with the auxiliary shaft sleeve; the atmosphere side moving ring 4 is positioned in the spring seat 9, rotates together with the spring seat 9, and can slide up and down freely in the spring seat; the atmospheric static ring 5 and the atmospheric dynamic ring 4 form an atmospheric sealing friction pair, which plays a role of safety sealing and prevents a large amount of nitrogen from leaking outwards; the atmospheric static ring 5 is fixed on the bearing seat 10; the oil seal 13 is used for sealing gaps between the bearing seat 10 and the auxiliary shaft sleeve 7 and between the bearing gland 11 and the shaft sleeve 1, so that the bearing lubricating oil is prevented from polluting dry gas seal and the external impurities are prevented from polluting the bearing.
The beneficial effects of the utility model are as follows:
(1) The medium side sealing dynamic and static ring and the atmosphere side sealing dynamic and static ring form a double-end-face dry air seal, and zero leakage of the medium is realized by utilizing the sealing air pressure which is higher than the medium pressure by more than 0.2 MPa;
(2) The medium side sealing dynamic and static ring adopts silicon carbide material, is a hard-to-hard pairing mode, avoids the generation of graphite powder under the extreme abnormal condition, and avoids the possibility of medium pollution;
(3) The medium side sealing structure is of an internal pressure type, the pressure of the inner side close to the outer circle of the shaft sleeve is higher than the pressure of the outer side far away from the outer circle of the shaft sleeve, and the requirements of SIP and CIP in the food and medicine industry are met;
(4) All parts contacted with the medium adopt large circular arc and large chamfer designs, and the surfaces of the parts are polished, so that dead zones are avoided from being formed between the medium side movable ring and the shaft sleeve as well as between the medium side static ring and the flange plate, and the requirements of SIP and CIP in the food and medicine industry are met;
(5) The metal part contacted with the medium adopts food grade 316L stainless steel, and the auxiliary sealing ring adopts rubber material with FDA authentication, thereby meeting the FDA requirement of food and medicine industry.
Drawings
Fig. 1 is a schematic structural view of the present utility model.
The device comprises a shaft sleeve 1, a medium side movable ring 2, a medium side stationary ring 3, an atmosphere side movable ring 4, an atmosphere side stationary ring 5, a flange plate 6, an auxiliary shaft sleeve 7, a cavity 8, a spring seat 9, a bearing seat 10, a bearing cover 11, a bearing 12, an oil seal 13 and a shaft clip 14.
Detailed Description
Other advantages and effects of the present utility model will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present utility model with reference to specific examples. The utility model may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present utility model.
The embodiment provides a dry gas sealing device for food medicine trade desiccator, includes: the device comprises a shaft sleeve 1, a medium side movable ring 2, a medium side static ring 3, an atmosphere side movable ring 4, an atmosphere side static ring 5, a flange 6, a countershaft sleeve 7, a cavity 8, a spring seat 9, a bearing seat 10, a bearing gland 11, a bearing 12, an oil seal 13 and a shaft holder 14;
the shaft sleeve 1 is fixed on a main shaft of the dryer, and the main shaft of the dryer drives the shaft sleeve 1 to rotate;
the medium side movable ring 2 is fixed at one end of the shaft sleeve 1 close to a medium;
the medium side static ring 3 is positioned at one side of the medium side moving ring 2 far away from the medium and forms a friction pair of medium side sealing with the medium side moving ring 2, and the medium side static ring is positioned right above the medium side moving ring in normal operation;
the medium side stationary ring 3 is connected inside the flange plate 6 in a sliding way;
the auxiliary shaft sleeve 7 is fixed on the outer surface of the shaft sleeve 1 far away from the main shaft of the dryer;
the spring seat 9 is fixed on the auxiliary shaft sleeve 7 between the flange 6 and the atmosphere side static ring 5, wherein the flange is positioned below and the atmosphere side static ring is positioned above;
the atmosphere side moving ring 4 is positioned in the spring of the spring seat 9, and the spring seat drives the atmosphere side moving ring 4 to rotate together with the spring seat 9 and simultaneously move up and down along with the spring inside the spring seat 9;
the atmosphere static ring 5 is positioned on one side of the atmosphere moving ring 4 away from the medium and forms an atmosphere sealed friction pair with the atmosphere moving ring 4;
the atmospheric static ring 5 is fixed on the bearing seat 10; the inner ring of a bearing 12 of the bearing seat 10 is fixed on the shaft sleeve 1, and the outer ring of the bearing is fixed on the bearing seat 10;
the bearing cover 11 fixes the bearing 12 on the bearing seat 10;
the oil seals 13 are respectively sealed between the bearing seat 10 and the auxiliary shaft sleeve 7, and between the bearing gland 11 and the shaft sleeve 1;
along the direction from the medium side to the atmosphere side, the flange 6 is connected with the cavity 8, the bearing seat 10 and the bearing cover 11 in sequence to form a whole sealed shell.
In some embodiments, sleeve 1 is fixed to the main shaft of the dryer by means of a shaft clamp 14, rotating with the main shaft of the dryer;
in some embodiments, the flange 6 is connected with the cavity 8, the bearing seat 10 and the bearing cover 11 in sequence, and the whole sealed shell is formed by screw connection.
In some embodiments, hydrodynamic grooves are formed on the medium side moving ring 2 or the medium side static ring 3, and when the seal is in normal operation, an air film is formed on the end surface under the action of the hydrodynamic grooves, and the moving ring and the static ring are in non-contact operation.
In some embodiments, hydrodynamic grooves are formed on the atmospheric static ring 5, and under the action of the hydrodynamic grooves, the end face forms a gas film when the seal is in normal operation, and the dynamic ring and the static ring are in non-contact operation.
In some embodiments, the medium side movable ring 2 and the medium side static ring 3 are made of silicon carbide, and a wear-resistant coating is sprayed on one ring surface, so that the wear resistance and self-lubricity of the seal in abnormal conditions are improved.
In some embodiments, the shaft sleeve 1 is prevented from deflection affecting proper operation of the seal by the bearing 12 maintaining the coaxiality of the seal rotating and stationary members.
The working process of the embodiment is as follows: the main shaft of the drier drives the shaft sleeve 1 to rotate together; the medium side movable ring 2 is driven to rotate along with the shaft sleeve, and the medium side static ring 3 and the medium side movable ring 2 form a friction pair for medium side sealing, so that the main sealing effect is achieved, and medium leakage is prevented; the medium side stationary ring 3 is positioned in the flange of the piece 6 and can slide up and down freely in the flange; the auxiliary shaft sleeve 7 is fixed on the shaft sleeve of the member 1 and rotates together with the shaft sleeve; the spring seat 9 is fixed on the auxiliary shaft sleeve of the piece 7 and rotates together with the auxiliary shaft sleeve; the atmosphere side moving ring 4 is positioned in the spring seat 9, rotates together with the spring seat 9, and can slide up and down freely in the spring seat; the atmospheric static ring 5 and the atmospheric dynamic ring 4 form an atmospheric sealing friction pair, which plays a role of safety sealing and prevents a large amount of nitrogen from leaking outwards; the atmospheric static ring 5 is fixed on the bearing seat 10; the oil seal 13 is used for sealing gaps between the bearing seat 10 and the auxiliary shaft sleeve 7 and between the bearing gland 11 and the shaft sleeve 1 respectively, so that the bearing lubricating oil is prevented from polluting dry gas seal and the external impurities are prevented from polluting the bearing.
The embodiment adopts a novel sealing structure, the medium side movable ring and the medium side static ring are of an internal pressure type dry air sealing structure, the atmosphere side movable ring and the atmosphere side static ring are of an external pressure type dry air sealing structure, the medium side sealing movable static ring and the atmosphere side sealing movable static ring form a double-end-face dry air sealing structure, zero leakage of a medium is realized by controlling the sealing nitrogen pressure to be higher than the medium pressure by more than 0.2MPa, and the nitrogen cannot pollute medium materials;
in some embodiments, the medium side sealing dynamic and static rings are made of silicon carbide materials, and are in a hard-to-hard pairing mode, so that the generation of graphite powder under extreme abnormal conditions is avoided, and the possibility of medium pollution is avoided;
in some embodiments, the medium side sealing structure is of an internal pressure type, and the pressure of the inner side close to the outer circle of the shaft sleeve is higher than the pressure of the outer side far from the outer circle of the shaft sleeve, so that the requirements of SIP and CIP in the food and medicine industry are met;
in some embodiments, all parts contacted with the medium are designed in a large arc and large chamfer, and the surfaces of the parts are polished, so that dead zones are avoided from being formed between the medium side movable ring and the shaft sleeve as well as between the medium side static ring and the flange plate, and the requirements of SIP and CIP in the food and medicine industry are met;
in some embodiments, all metal components in contact with the medium are food grade 316L stainless steel, and the auxiliary sealing ring is made of rubber materials with FDA certification, so that the FDA requirements of the food and medicine industry are met.
The above embodiments are merely illustrative of the principles of the present utility model and its effectiveness, and are not intended to limit the utility model. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the utility model. Accordingly, it is intended that all equivalent modifications and variations of the utility model be covered by the claims of this utility model, which are within the skill of those skilled in the art, can be made without departing from the spirit and scope of the utility model disclosed herein.
Claims (6)
1. A dry gas sealing device for a dryer in the food and medicine industry is characterized in that: comprising the following steps: the device comprises a shaft sleeve (1), a medium side movable ring (2), a medium side static ring (3), an atmosphere side movable ring (4), an atmosphere side static ring (5), a flange plate (6), a countershaft sleeve (7), a cavity (8), a spring seat (9), a bearing seat (10), a bearing gland (11), a bearing (12) and an oil seal (13);
the shaft sleeve (1) is fixed on a main shaft of the dryer, and the main shaft of the dryer drives the shaft sleeve (1) to rotate;
the medium side movable ring (2) is fixed at one end of the shaft sleeve (1) close to a medium;
the medium side static ring (3) is positioned on one side of the medium side moving ring (2) away from the medium and forms a friction pair of medium side sealing with the medium side moving ring (2);
the medium side stationary ring (3) is connected inside the flange plate (6) in a sliding way;
the auxiliary shaft sleeve (7) is fixed on the outer surface of the shaft sleeve (1) far away from the main shaft of the dryer;
the spring seat (9) is fixed on the auxiliary shaft sleeve (7) between the flange plate (6) and the atmospheric static ring (5);
the atmosphere side moving ring (4) is positioned in the spring seat (9), and the spring seat drives the atmosphere side moving ring (4) to rotate together with the spring seat (9) and simultaneously move up and down along with the spring in the spring seat (9);
the atmosphere static ring (5) is positioned on one side of the atmosphere dynamic ring (4) far away from the medium and forms an atmosphere sealed friction pair with the atmosphere dynamic ring (4);
the atmospheric static ring (5) is fixed on the bearing seat (10); the inner ring of a bearing (12) of the bearing seat (10) is fixed on the shaft sleeve (1), and the outer ring of the bearing is fixed on the bearing seat (10);
the bearing cover (11) fixes the bearing (12) on the bearing seat (10);
the oil seals (13) are respectively sealed between the bearing seat (10) and the auxiliary shaft sleeve (7) and between the bearing gland (11) and the shaft sleeve (1);
along the direction from the medium side to the atmosphere side, the flange plate (6) is sequentially connected with the cavity (8), the bearing seat (10) and the bearing gland (11) to form the whole sealed shell.
2. The dry gas sealing device for a dryer in the food and pharmaceutical industry according to claim 1, wherein: the shaft sleeve (1) is fixed on the main shaft of the dryer through the shaft clasper (14) and rotates along with the main shaft of the dryer.
3. The dry gas sealing device for a dryer in the food and pharmaceutical industry according to claim 1, wherein: the flange plate (6) is connected with the cavity (8), the bearing seat (10) and the bearing cover (11) in sequence, and the whole sealed shell is formed by connecting the flange plate with the cavity through a screw.
4. The dry gas sealing device for a dryer in the food and pharmaceutical industry according to claim 1, wherein: hydrodynamic grooves are processed on the medium side moving ring (2) or the medium side static ring (3).
5. The dry gas sealing device for a dryer in the food and pharmaceutical industry according to claim 1, wherein: the atmospheric static ring (5) is provided with hydrodynamic grooves.
6. The dry gas sealing device for a dryer in the food and pharmaceutical industry according to claim 1, wherein: the medium side movable ring (2) and the medium side stationary ring (3) are made of silicon carbide, and a wear-resistant coating is sprayed on the surface of one ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223452961.5U CN219452887U (en) | 2022-12-23 | 2022-12-23 | Dry gas sealing device for dryer in food and medicine industry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223452961.5U CN219452887U (en) | 2022-12-23 | 2022-12-23 | Dry gas sealing device for dryer in food and medicine industry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219452887U true CN219452887U (en) | 2023-08-01 |
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ID=87423023
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223452961.5U Active CN219452887U (en) | 2022-12-23 | 2022-12-23 | Dry gas sealing device for dryer in food and medicine industry |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219452887U (en) |
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2022
- 2022-12-23 CN CN202223452961.5U patent/CN219452887U/en active Active
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