CN203906373U - Single-end-face antifriction mechanical seal - Google Patents
Single-end-face antifriction mechanical seal Download PDFInfo
- Publication number
- CN203906373U CN203906373U CN201420309514.0U CN201420309514U CN203906373U CN 203906373 U CN203906373 U CN 203906373U CN 201420309514 U CN201420309514 U CN 201420309514U CN 203906373 U CN203906373 U CN 203906373U
- Authority
- CN
- China
- Prior art keywords
- seal
- sealing
- oil seal
- centrifugal pump
- gland
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 238000007789 sealing Methods 0.000 claims abstract description 47
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 239000000314 lubricant Substances 0.000 claims abstract description 18
- 210000004907 gland Anatomy 0.000 claims abstract description 17
- 238000005406 washing Methods 0.000 claims description 7
- 238000011010 flushing procedure Methods 0.000 claims description 5
- 230000008676 import Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 239000000498 cooling water Substances 0.000 abstract description 7
- 238000003860 storage Methods 0.000 abstract description 6
- 238000001816 cooling Methods 0.000 abstract 1
- 230000007613 environmental effect Effects 0.000 abstract 1
- 238000007710 freezing Methods 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 238000005086 pumping Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 2
- 230000002688 persistence Effects 0.000 description 2
- 230000002528 anti-freeze Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000009837 dry grinding Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Mechanical Sealing (AREA)
Abstract
The utility model provides a single-end-face antifriction mechanical seal which is mainly characterized in that a framework oil seal is added on the rear portion of a single-end-face mechanical seal gland, an oil seal sealing cavity is formed between the framework oil seal and the mechanical seal, a liquid storage tank is externally connected to the gland to provide lubricant for the oil seal sealing cavity, a liquid inlet and a liquid outlet of the liquid storage tank are connected with a gland sealing liquid inlet and a gland sealing liquid outlet respectively, and the lubricant automatically circulates in the liquid storage tank and the oil seal sealing cavity for cooling through the thermal siphon principle. The single-end-face antifriction mechanical seal is mainly applied to working condition that the mechanical seal is damaged due to dry friction caused by short-time idling, cutoff or evacuation in operation of a centrifugal pump. The single-end-face antifriction mechanical seal has the advantages that the structure is simple, price is low, the lubricant in the liquid storage tank can be selected to be anti-freezing lubricant according to the environmental temperature, and the lubricant still can be used outdoors in winter in northern areas; cooling water is not needed, use conditions are simple, operation is reliable, and the application range is wide; no pressure exists in the oil seal sealing cavity, the lubricant is clear without impurities, and it is guaranteed that the framework oil seal can operate stably for a long time; pressure in the oil seal sealing cavity is lower than pressure in a centrifugal pump sealing cavity, and the lubricant in the oil seal sealing cavity can not enter the centrifugal pump to pollute pumping media.
Description
Technical field
The utility model relates to the antifriction mechanical seal of a kind of novel single end face, and particularly a kind ofly there will be short time idle running while turning round for centrifugal pump, stop or find time, thus the single mechanical end face seal that the operating mode that causes mechanical seal to damage because of dry friction is used.
Background technique
With pump running, often there is cutout or vaccuum phenomenon in some special operation conditions, while putting on the firm entry into service of self-priming pump under the liquid of some type, centrifugal pump and self-priming apparatus turn round simultaneously, now centrifugal pump idle running, in Seal cage, without medium, mechanical seal is often because dry friction damages.There were three kinds meeting the method that these operating modes adopt often in the past: one, adopt double mechanical seal, this scheme cost is too high.Two, additional washing solution is as PLAN32 scheme, opens that in pump forward direction Seal cage, to inject sparge water etc. lubricated, avoids its dry grinding.But a lot of scenes cannot provide outside washing solution, and some pumped medium do not allow external medium to enter flow process affects its product quality.Three, adopt PLAN62 scheme to be honored as a queen and to add nockbush and inject cooling water at machine, on-the-spot possibly cannot provide cooling water on the one hand, and its cooling water flows to the wasting while befouling environment of trench on the other hand.
Summary of the invention
The purpose of this utility model is the deficiency existing in above-mentioned technology, the problem of machinery bad seals while providing the antifriction mechanical seal of a kind of novel single end face to find time or dally to solve centrifugal pump.
The purpose of this utility model is achieved in that and comprises single mechanical end face seal, liquid container and outside framework oil seal three parts.It is characterized in that increasing at single mechanical end face seal gland rear portion an outside framework oil seal, between outside framework oil seal and mechanical seal, form oil sealing sealing chamber, the external liquid container of gland provides lubricant oil to oil sealing sealing chamber, liquid container sealing liquid is imported and exported respectively and is imported and exported and is connected with gland sealing liquid, and lubricant oil leans on thermosiphon principle circulation temperature lowering voluntarily in liquid container and oil sealing sealing chamber.
When centrifugal pump is in idle running or during evacuated, in centrifugal pump Seal cage, without medium, mechanical seal, by the oil lubrication of storage in oil sealing sealing chamber, prevents its dry friction.Because of idle running or evacuated general persistence very short, between sealing surface, fricative heat is few, therefore liquid container can lead to cooling water temperature.When centrifugal pump returns to normal state, by drawing medium to flushing hole from outlet of centrifugal pump, washing solution is provided to centrifugal pump Seal cage, the heat producing while taking away mechanical seal running by this washing solution, guarantees the normal operation of mechanical seal.
Beneficial effect of the present invention: 1, simply cheap with double mechanical seal structure compared, do not need former mechanical seal to carry out large transformation; 2, the lubricant oil adding in liquid container can be chosen antifreeze lubricant oil according to ambient temperature, and north of china in winter is outdoor still can be used; 3, do not need logical cooling water, service condition is simple, reliable, and Applicable scope is wider; 4, with no pressure in oil sealing sealing chamber, the clean free from admixture of lubricant oil, can guarantee outside framework oil seal operation steady in a long-term; 5, oil sealing sealing cavity pressure is lower than centrifugal pump Seal cage internal pressure, and the lubricant oil in oil sealing sealing chamber can not enter in centrifugal pump, thereby pollutes to pumped medium.
accompanying drawing explanation:
Fig. 1 is structural front view of the present invention
Fig. 2 is the rear view of Fig. 1.
embodiment:
Below in conjunction with accompanying drawing, 1-2 is described further the present embodiment:
From accompanying drawing 1-2, mechanical seal 1 is contained in centrifugal pump Seal cage 2, and gland 3 is contained in outside centrifugal pump Seal cage 2, at gland 3, rear pressing cover 6 is installed below, outside framework oil seal 5 is contained in rear pressing cover 6, and the enclosed cavity of outside framework oil seal 5 and 1 formation of mechanical seal is oil sealing sealing chamber 4.It is other that liquid container 7 is contained in gland 3, and the in-built lubricant oil of liquid container provides lubricant oil to Seal cage 4.Liquid container sealing liquid outlet 9 is connected with gland sealing liquid import 10, and liquid container sealing liquid import 11 is connected with gland sealing liquid outlet 12.Lubricant oil is by thermosiphon principle circulation temperature lowering voluntarily in liquid container 7 and oil sealing sealing chamber 4.Flushing hole 12 communicates with centrifugal pump Seal cage 2 and outlet of centrifugal pump.When centrifugal pump is in idle running or during evacuated, centrifugal pump Seal cage 2 is interior without medium, and mechanical seal 1, by the oil lubrication of oil sealing sealing chamber 4 interior storages, prevents its dry friction.Because of idle running or evacuated general persistence very short, between sealing surface, fricative heat is few, therefore liquid container can lead to cooling water temperature.When centrifugal pump returns to normal state, by drawing medium to flushing hole 12 from outlet of centrifugal pump, washing solution is provided to centrifugal pump Seal cage 2, the heat producing while taking away mechanical seal running by this washing solution, guarantees the normal operation of mechanical seal.
Claims (2)
1. the antifriction mechanical seal of single end face, comprise single mechanical end face seal, liquid container and outside framework oil seal three parts, it is characterized in that single mechanical end face seal is contained in centrifugal pump Seal cage, gland is contained in outside centrifugal pump Seal cage, rear pressing cover is installed after gland, outside framework oil seal is contained in rear pressing cover, between outside framework oil seal and mechanical seal, form oil sealing sealing chamber, the external liquid container of gland provides lubricant oil to oil sealing sealing chamber, the outlet of liquid container sealing liquid is connected with the import of gland sealing liquid, the import of liquid container sealing liquid is connected with the outlet of gland sealing liquid, lubricant oil is by thermosiphon principle circulation temperature lowering voluntarily in liquid container and oil sealing sealing chamber, flushing hole communicates with centrifugal pump Seal cage and outlet of centrifugal pump.
2. the antifriction mechanical seal of single end face according to claim 1, the washing solution providing by flushing hole while it is characterized in that centrifugal pump normal operation is lowered the temperature to mechanical seal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420309514.0U CN203906373U (en) | 2014-06-12 | 2014-06-12 | Single-end-face antifriction mechanical seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420309514.0U CN203906373U (en) | 2014-06-12 | 2014-06-12 | Single-end-face antifriction mechanical seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203906373U true CN203906373U (en) | 2014-10-29 |
Family
ID=51780656
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420309514.0U Expired - Lifetime CN203906373U (en) | 2014-06-12 | 2014-06-12 | Single-end-face antifriction mechanical seal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203906373U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106195277A (en) * | 2016-08-30 | 2016-12-07 | 宁波天工机械密封有限公司 | Clinker elevator mechanical seal |
| CN108644151A (en) * | 2018-06-08 | 2018-10-12 | 安徽阿莫斯泵业有限公司 | A kind of anhydrous dry rotation protection device of mechanical seal |
-
2014
- 2014-06-12 CN CN201420309514.0U patent/CN203906373U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106195277A (en) * | 2016-08-30 | 2016-12-07 | 宁波天工机械密封有限公司 | Clinker elevator mechanical seal |
| CN108644151A (en) * | 2018-06-08 | 2018-10-12 | 安徽阿莫斯泵业有限公司 | A kind of anhydrous dry rotation protection device of mechanical seal |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141029 |