CN209761715U - Lubricating and cooling device for external mechanical seal of Roots pump - Google Patents
Lubricating and cooling device for external mechanical seal of Roots pump Download PDFInfo
- Publication number
- CN209761715U CN209761715U CN201920393341.8U CN201920393341U CN209761715U CN 209761715 U CN209761715 U CN 209761715U CN 201920393341 U CN201920393341 U CN 201920393341U CN 209761715 U CN209761715 U CN 209761715U
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- mechanical seal
- driving shaft
- oil
- cooling water
- front cover
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Abstract
The utility model relates to a roots pump is with outer mechanical seal's lubricated cooling device belongs to roots pump technical field. The mechanical seal oil seal device comprises a front cover and a driving shaft, wherein the driving shaft is arranged in the front cover, an oil isolating ring is sleeved on the driving shaft and fixed on the inner side of the front cover, a cooling water jacket is further arranged on the inner side of the front cover, a machine seal pressing cover is fixedly arranged on the outer side of the front cover, a cavity is formed among the oil isolating ring, the cooling water jacket, the machine seal pressing cover and the driving shaft, a mechanical seal is arranged in the cavity, the mechanical seal is sleeved on the driving shaft, a lubricating oil pipeline is arranged in the cooling water jacket, one end of the lubricating oil pipeline is communicated with an oil cup, and the other. An oil cavity is formed among the oil-isolating ring, the cooling water jacket, the mechanical seal gland and the driving shaft, so that the mechanical seal is soaked in lubricating oil; under the working condition of the mechanical seal, the generated heat is exchanged, so that the working temperature of the mechanical seal is ensured, and the service life of the mechanical seal is prolonged.
Description
Technical Field
The utility model relates to a roots pump is with outer mechanical seal's lubricated cooling device belongs to roots pump technical field.
Background
The Roots vacuum pump is a variable-capacity vacuum pump which is internally provided with two blade-shaped rotors which synchronously rotate in opposite directions, and small gaps are arranged among the rotors and between the rotors and the inner wall of a pump shell so as not to be in contact with each other.
The sealing of the driving end of the Roots pump adopts a mechanical seal, the mechanical seal is that a rotating ring is arranged on a driving shaft and rotates along with the rotation of the shaft, a static ring is arranged on a connecting surface and does not rotate along with the rotation of the rotating shaft, the friction surface of the static ring is contacted with the friction surface of the rotating ring when the rotating shaft rotates at a high speed, and a layer of oil film is formed in the friction surfaces of the static ring and the rotating ring, so that the sealing is formed. Mechanical seals require adequate lubrication and good heat dissipation conditions under operating conditions. The mechanical seal is not lubricated enough or the heat dissipation condition can cause a series of problems such as burning, cracking and breaking of the mechanical seal, deformation of the O-shaped ring and the like, the mechanical seal is finally damaged, and the service life of the mechanical seal is reduced.
However, the mechanical seal is expensive due to the complex machining process and high precision requirement of the mirror surface, and the maintenance cost is increased if the mechanical seal is frequently damaged. Therefore, it is necessary to provide a sufficiently good working environment for the mechanical seal.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an outer mechanical seal's lubrication and cooling device for lobe pump is provided to above-mentioned prior art, extension mechanical seal's life reduces manufacturing cost.
The utility model provides a technical scheme that above-mentioned problem adopted does: the utility model provides a lubricating and cooling device of external mechanical seal for roots pump, includes protecgulum and driving shaft, the driving shaft is located in the protecgulum, the cover has the oil interceptor on the driving shaft, the oil interceptor is fixed in the protecgulum inboard, the protecgulum inboard still is equipped with cooling jacket, the protecgulum outside is fixed and is equipped with the mechanical seal gland, be equipped with the die cavity between oil interceptor, cooling jacket, the mechanical seal gland and the driving shaft, be equipped with mechanical seal in the die cavity, mechanical seal overlaps on the driving shaft, be equipped with lubricated oil pipe way in the cooling jacket, lubricated oil pipe way one end and oil cup intercommunication, the lubricated oil pipe way other end intercommunication die cavity, the lubricating oil in the oil cup flows to the die cavity through the lubricated pipeline in the cooling jacket, and.
The cavity is annularly arranged.
Compared with the prior art, the utility model has the advantages of: a lubricating and cooling device of an external mechanical seal for a Roots pump is characterized in that an annular cavity is formed among an oil-isolating ring, a cooling water jacket, a mechanical seal gland and a driving shaft, lubricating oil flows into the annular cavity after passing through an oil cup and a lubricating oil pipeline to form an oil cavity, so that the mechanical seal is soaked in the lubricating oil to ensure the lubrication of the mechanical seal; under the working condition of the mechanical seal, the heat generated is exchanged, and the heat of the lubricating oil is directly taken away by the cooling water on the cooling water jacket, so that the working temperature of the mechanical seal is ensured, and the service life of the mechanical seal is prolonged.
Drawings
Fig. 1 is a schematic view of a lubricating and cooling device of an external mechanical seal for a roots pump according to an embodiment of the present invention;
In the figure, a front cover 1, an oil cup 2, a lubricating oil pipeline 3, a cooling water jacket 4, a mechanical seal gland 5, a driving shaft 6, a mechanical seal 7, an oil separating ring 8 and a cavity 9 are arranged.
Detailed Description
The present invention will be described in further detail with reference to the following embodiments.
As shown in fig. 1, the lubricating and cooling device of the external mechanical seal for the roots pump in the embodiment comprises a front cover 1 and a driving shaft 6, the driving shaft 6 is arranged in the front cover 1, an oil-isolating ring 8 is sleeved on the driving shaft 6, the oil-isolating ring 8 is arranged on the inner side of the front cover 1 and is fixedly connected with the inner side of the front cover 1, a cooling water jacket 4 is further arranged on the inner side of the front cover 1, a mechanical seal pressing cover 5 is fixedly arranged on the outer side of the front cover 1, wherein a circumferential cavity 9 is arranged among the oil-isolating ring 8, the cooling water jacket 4, the mechanical seal 7 sleeved on the driving shaft 6 is arranged in the circumferential cavity 9, a lubricating oil pipeline 3 is arranged in the cooling water jacket 4, one end of the lubricating oil pipeline 3 is communicated with an oil cup 2, the other end of the lubricating oil pipeline 3 is communicated with the cavity 9, the lubricating oil flows to the lubricating oil pipeline 3 in the cooling water, the mechanical seal 7 is soaked in the lubricating oil, and the mechanical seal 7 is sufficiently lubricated.
Since the lubricating oil pipeline 3 is arranged in the cooling water jacket 4, the cooling water on the cooling water jacket 4 cools the lubricating oil. Under the working condition of the mechanical seal 7, the generated heat is directly taken away by cooling water on the cooling water jacket 4 through heat exchange to cool the mechanical seal 7, so that the working temperature of the mechanical seal 7 is ensured, the problems of burning the mechanical seal 7 due to high temperature and the like are avoided, the service life of the mechanical seal 7 is greatly prolonged, and the maintenance cost is reduced.
In addition to the above embodiments, the present invention also includes other embodiments, and all technical solutions formed by equivalent transformation or equivalent replacement should fall within the protection scope of the claims of the present invention.
Claims (2)
1. The utility model provides a roots pump is with outer mechanical seal's lubricated cooling device, includes protecgulum (1) and driving shaft (6), in protecgulum (1) was located in driving shaft (6), its characterized in that: an oil isolating ring (8) is sleeved on the driving shaft (6), the oil isolating ring (8) is fixed on the inner side of the front cover (1), a cooling water jacket (4) is arranged on the inner side of the front cover (1), a mechanical seal gland (5) is fixedly arranged on the outer side of the front cover (1), a cavity (9) is arranged between the oil-separating ring (8), the cooling water jacket (4), the mechanical seal gland (5) and the driving shaft (6), a mechanical seal (7) is arranged in the cavity (9), the mechanical seal (7) is sleeved on the driving shaft (6), and a lubricating oil pipeline (3) is arranged in the cooling water jacket (4), one end of the lubricating oil pipeline (3) is communicated with the oil cup (2), the other end of the lubricating oil pipeline (3) is communicated with the cavity (9), and lubricating oil in the oil cup (2) flows to the cavity (9) through the lubricating oil pipeline (3) in the cooling water jacket (4) to lubricate and cool the mechanical seal (7).
2. The lubrication cooling device for the external mechanical seal of the roots pump as claimed in claim 1, wherein: the cavity (9) is arranged annularly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920393341.8U CN209761715U (en) | 2019-03-27 | 2019-03-27 | Lubricating and cooling device for external mechanical seal of Roots pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920393341.8U CN209761715U (en) | 2019-03-27 | 2019-03-27 | Lubricating and cooling device for external mechanical seal of Roots pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209761715U true CN209761715U (en) | 2019-12-10 |
Family
ID=68756425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920393341.8U Active CN209761715U (en) | 2019-03-27 | 2019-03-27 | Lubricating and cooling device for external mechanical seal of Roots pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209761715U (en) |
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2019
- 2019-03-27 CN CN201920393341.8U patent/CN209761715U/en active Active
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