CN213331658U - Sanitary flushable double-end-face large-spring mechanical sealing device - Google Patents
Sanitary flushable double-end-face large-spring mechanical sealing device Download PDFInfo
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- CN213331658U CN213331658U CN202021415418.6U CN202021415418U CN213331658U CN 213331658 U CN213331658 U CN 213331658U CN 202021415418 U CN202021415418 U CN 202021415418U CN 213331658 U CN213331658 U CN 213331658U
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Abstract
The utility model provides a big spring mechanical seal device of sanitary type flushable two-end face, including the pump shaft and with pump shaft fixed connection's impeller, the cover has the pump cover in the outer fringe of pump shaft and impeller junction, forms the pump chamber between pump cover and impeller, the pump shaft, forms main seal structure in the pump chamber, forms auxiliary seal structure between pump cover outer end and the pump shaft. The utility model discloses can be applied to the complicated condition of health trade operating mode, its simple structure, operation are stable, easily make, are one kind and worth the wide application novel bearing seal device.
Description
Technical Field
The utility model relates to a shaft end sealing device field specifically is a big spring mechanical seal device of two terminal surfaces can be washed to sanitary type for in the clean centrifugal pump that requires higher of health such as food, beverage, dairy products.
Background
Nowadays, people pay more attention to the problem of food safety, and it is very important for manufacturers to ensure the sanitation of the food processing process. When various media are conveyed by using a sanitary pump in the processing process, the safety and the sanitation of the pump during conveying are determined by the performance of the mechanical seal. The various complex characteristics of the media make efficient operation of the machine seal challenging.
When viscous and easily crystallized media are conveyed, the media are easy to cause sealing failure when the media deposit and crystallize on the sealing end face; when high-temperature media are conveyed, the sealing end face is often burnt out due to overhigh temperature. Therefore, a double-end-face mechanical seal is often used for flushing, lubricating and cooling the sealing end face, and stable conveying of materials is guaranteed.
Mechanical seals are also inevitably damaged during long-term material transport, so that easy handling and replacement of the seals are also necessary.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve prior art's problem, provide a big spring mechanical seal device of sanitary type flushable two-terminal surface, can be applied to the complicated condition of health trade operating mode, its simple structure, operation are stable, easily make, are one kind and worth the wide application novel bearing seal device.
The utility model comprises a pump shaft and an impeller fixedly connected with the pump shaft, wherein a pump cover is sleeved on the outer edge of the joint of the pump shaft and the impeller, a pump cavity is formed between the pump cover and the impeller as well as between the pump cover and the pump shaft, a main sealing structure is formed in the pump cavity, and an auxiliary sealing structure is formed between the outer end of the pump cover and the pump shaft;
the main sealing structure comprises a movable ring fixing ring, a movable ring, a first sealing ring, a compression spring, a second sealing ring, a static ring fixing ring and a static ring which are arranged in a pump cavity, wherein the movable ring fixing ring is screwed into the impeller, the movable ring fixing ring presses the movable ring to abut against the back surface of the impeller, and the sealing between the movable ring fixing ring and the impeller is realized through the first sealing ring at the groove on the movable ring; the static ring is embedded on the static ring fixing ring to form a whole, a compression spring is arranged between the static ring fixing ring and the pump shaft, the static ring and the dynamic ring are mutually abutted to form a sealing end face, and the pressure of the sealing end face is formed by the pressure of the pump cavity and the compression spring; the static ring fixing ring and the pump cover are sealed through a second sealing ring;
the auxiliary sealing structure adopts an external type and comprises an auxiliary static ring, an auxiliary dynamic ring, a third sealing ring, a fixing pin and a fourth sealing ring, the auxiliary dynamic ring rotates together with the pump shaft through the fixing pin fixed on the pump shaft, and the auxiliary dynamic ring and the pump shaft are sealed by the third sealing ring; the auxiliary static ring and the auxiliary static ring fixing ring are made into a whole, the auxiliary static ring and the auxiliary dynamic ring form a sealing end face to prevent cooling liquid from leaking, a sealing ring groove is formed in the auxiliary static ring fixing ring, and sealing is achieved through a fourth sealing ring and the pump cover; an auxiliary sealing spring is arranged between the auxiliary stationary ring fixing ring and the pump shaft.
The improved structure is characterized in that a plurality of small holes are uniformly distributed in the stationary ring fixing ring, and the compression spring is fixed with the stationary ring fixing ring through the small holes. On the one hand, the compression spring is convenient to fix on the sealing end face, and on the other hand, the cooling liquid is convenient to enter the sealing cavity to wash, lubricate and cool the sealing end face.
The auxiliary static ring fixing ring is further improved, a plurality of small holes are uniformly distributed in the auxiliary static ring fixing ring, and the auxiliary sealing spring is fixed on the auxiliary static ring fixing ring through the small holes, so that cooling liquid can conveniently enter the auxiliary sealing end face for lubricating and cooling.
The utility model has the advantages that:
after adopting above-mentioned structure, compare with general machine seal: the seal between the mechanical seal movable ring and the impeller is more stable, and the seal failure caused by the pressure fluctuation in the pump cavity can be avoided; the compression spring provides a certain sealing pressure for the sealing end face, and when the impeller is vibrated by the pressure fluctuation of the pump cavity, the compression spring can compensate the pressure change of the sealing end face in time, so that the mechanical sealing device can normally operate. In addition, in the whole conveying process, the conveyed materials are only contacted with the movable ring, the static ring and the sealing ring; the sealing end face can be effectively cleaned when materials which are easy to crystallize and have high viscosity are conveyed; the sanitation of the conveying process is ensured. The conveyed materials can not contact with the compression spring, so that the materials are remained on the compression spring, and the compression spring is invalid.
Drawings
Fig. 1 is a sectional view of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
The utility model comprises a pump shaft 12 and an impeller 1 fixedly connected with the pump shaft 12, wherein a pump cover 5 is sleeved on the outer edge of the joint of the pump shaft 12 and the impeller 1, a pump cavity 18 is formed between the pump cover 5 and the impeller 1 as well as between the pump shaft 12, a main sealing structure is formed in the pump cavity, and an auxiliary sealing structure is formed between the outer end of the pump cover and the pump shaft;
the main sealing structure comprises a moving ring fixing ring 2, a moving ring 3, a first sealing ring 4, a compression spring 9, a second sealing ring 8, a static ring fixing ring 7 and a static ring 6 which are arranged in a pump cavity, wherein the moving ring fixing ring 2 is screwed into the impeller 1, the moving ring fixing ring 2 presses the moving ring 3 to abut against the back surface of the impeller 1, and the sealing between the moving ring fixing ring 2 and the impeller 1 is realized through the first sealing ring 4 at the groove on the moving ring 3; the static ring 6 is embedded on the static ring fixing ring 7 to form a whole, a compression spring 9 is arranged between the static ring fixing ring 7 and the pump shaft 12, the static ring 6 and the moving ring 3 are mutually abutted to form a sealing end face, and the pressure of the sealing end face is formed by the pressure of the pump cavity 18 and the compression spring 9; a second sealing ring 8 is used for sealing between the static ring fixing ring 7 and the pump cover 5;
the auxiliary sealing structure is external and comprises an auxiliary static ring 16, an auxiliary static ring fixing ring 11, an auxiliary dynamic ring 15, a third sealing ring 14, a fixing pin 13 and a fourth sealing ring 10, wherein the auxiliary dynamic ring 15 rotates together with the pump shaft 12 through the fixing pin 13 fixed on the pump shaft 12, and the auxiliary dynamic ring 15 and the pump shaft 12 are sealed 14 through the third sealing ring; the auxiliary stationary ring 16 and the auxiliary stationary ring fixing ring 11 are integrated, a sealing end face is formed by the auxiliary stationary ring and the auxiliary moving ring 15, cooling liquid leakage is prevented, a sealing ring groove is formed in the auxiliary stationary ring fixing ring 11, and sealing is achieved through the fourth sealing ring 10 and the pump cover 5; an auxiliary sealing spring 17 is arranged between the auxiliary stationary ring fixing ring 11 and the pump shaft 12.
The improved structure is characterized in that a plurality of small holes are uniformly distributed in the stationary ring fixing ring, and the compression spring is fixed with the stationary ring fixing ring through the small holes. On the one hand, the compression spring is convenient to fix on the sealing end face, and on the other hand, the cooling liquid is convenient to enter the sealing cavity to wash, lubricate and cool the sealing end face.
The improved structure is characterized in that a plurality of small holes are uniformly distributed in the auxiliary static ring fixing ring, and the auxiliary sealing spring 17 is fixed on the auxiliary static ring fixing ring through the small holes, so that cooling liquid can conveniently enter the auxiliary sealing end face for lubricating and cooling.
The double-end-face mechanical sealing device is simple in structure and very easy to replace and install. When special materials are conveyed, the cooling liquid pipe can be connected to effectively lubricate, cool and wash a small amount of residual materials on the sealing end surface of the sealing device; meanwhile, the sanitation of the materials is also ensured. In the conveying process, the pressure fluctuation facing the pump cavity, the compression spring can also timely compensate the pressure of the sealing end face, and the leakage is prevented. Therefore, the flushable double-end face sealing device can be applied to the condition of complex working conditions in the sanitary industry, has simple structure, stable operation and easy manufacture, and is a novel shaft sealing device which is widely applied.
The utility model discloses the concrete application way is many, and the above-mentioned only is the preferred embodiment of the utility model, should point out, to ordinary skilled person in this technical field, under the prerequisite that does not deviate from the utility model discloses the principle, can also make a plurality of improvements, and these improvements also should be regarded as the utility model discloses a protection scope.
Claims (3)
1. The utility model provides a big spring mechanical seal device of health type flushable two-sided which characterized in that: the pump comprises a pump shaft and an impeller fixedly connected with the pump shaft, wherein a pump cover is sleeved on the outer edge of the joint of the pump shaft and the impeller, a pump cavity is formed between the pump cover and the impeller as well as between the pump cover and the pump shaft, a main sealing structure is formed in the pump cavity, and an auxiliary sealing structure is formed between the outer end of the pump cover and the pump shaft;
the main sealing structure comprises a movable ring fixing ring, a movable ring, a first sealing ring, a compression spring, a second sealing ring, a static ring fixing ring and a static ring which are arranged in a pump cavity, wherein the movable ring fixing ring is screwed into the impeller, the movable ring fixing ring presses the movable ring to abut against the back surface of the impeller, and the sealing between the movable ring fixing ring and the impeller is realized through the first sealing ring at the groove on the movable ring; the static ring is embedded on the static ring fixing ring to form a whole, a compression spring is arranged between the static ring fixing ring and the pump shaft, the static ring and the dynamic ring are mutually abutted to form a sealing end face, and the pressure of the sealing end face is formed by the pressure of the pump cavity and the compression spring; the static ring fixing ring and the pump cover are sealed through a second sealing ring;
the auxiliary sealing structure adopts an external type and comprises an auxiliary static ring, an auxiliary dynamic ring, a third sealing ring, a fixing pin and a fourth sealing ring, the auxiliary dynamic ring rotates together with the pump shaft through the fixing pin fixed on the pump shaft, and the auxiliary dynamic ring and the pump shaft are sealed by the third sealing ring; the auxiliary static ring and the auxiliary static ring fixing ring are made into a whole, the auxiliary static ring and the auxiliary dynamic ring form a sealing end face to prevent cooling liquid from leaking, a sealing ring groove is formed in the auxiliary static ring fixing ring, and sealing is achieved through a fourth sealing ring and the pump cover; an auxiliary sealing spring is arranged between the auxiliary stationary ring fixing ring and the pump shaft.
2. The sanitary flushable double-ended large spring mechanical seal device of claim 1, wherein: a plurality of small holes are uniformly distributed in the static ring fixing ring, and the compression spring is fixed with the static ring fixing ring through the small holes.
3. The sanitary flushable double-ended large spring mechanical seal device of claim 1, wherein: a plurality of small holes are uniformly distributed on the auxiliary static ring fixing ring, and the auxiliary sealing spring is fixed on the auxiliary static ring fixing ring through the small holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021415418.6U CN213331658U (en) | 2020-07-17 | 2020-07-17 | Sanitary flushable double-end-face large-spring mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021415418.6U CN213331658U (en) | 2020-07-17 | 2020-07-17 | Sanitary flushable double-end-face large-spring mechanical sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213331658U true CN213331658U (en) | 2021-06-01 |
Family
ID=76089686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021415418.6U Active CN213331658U (en) | 2020-07-17 | 2020-07-17 | Sanitary flushable double-end-face large-spring mechanical sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213331658U (en) |
-
2020
- 2020-07-17 CN CN202021415418.6U patent/CN213331658U/en active Active
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