CN202483935U - Centrifugal pump with independent shaft-sealing mechanical sealing device - Google Patents
Centrifugal pump with independent shaft-sealing mechanical sealing device Download PDFInfo
- Publication number
- CN202483935U CN202483935U CN2012200813200U CN201220081320U CN202483935U CN 202483935 U CN202483935 U CN 202483935U CN 2012200813200 U CN2012200813200 U CN 2012200813200U CN 201220081320 U CN201220081320 U CN 201220081320U CN 202483935 U CN202483935 U CN 202483935U
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- mechanical sealing
- sealing
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- mechanical seal
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Abstract
The utility model relates to a centrifugal pump with an independent shaft-sealing mechanical sealing device. The centrifugal pump comprises a pump casing, an impeller, a sealing cavity, a support base, an auxiliary impeller and a pump shaft and is characterized in that a shaft-sealing mechanical sealing assembly is fixedly arranged on the pump shaft behind the sealing cavity, and the sealing cavity and the shaft-sealing mechanical sealing assembly on the pump shaft form the independent shaft-sealing mechanical sealing device. The centrifugal pump has the advantages that a double-end sealing structure which performs lubricating and cooling independently is adopted, the transferred media and the mechanically-sealed parts are totally separated, and the lubricating and cooling of the mechanical sealing device are completed by lubricating oil in the mechanical sealing cavity. The centrifugal pump is strong in pressure resistance, free of corrosion form the transferred media, free of abrasion on the pump shaft and a shaft sleeve, stable in working, long in service and capable of running empty and requires no maintenance, and further, the shaft sealing device is an independent mechanical sealing assembly and is easy to mount, demount and replace. According to on-site using test longer than two years, the centrifugal pump is totally in accordance with SY/T5612-2007 standard code.
Description
Technical field
The utility model belongs to centrifugal pump, relates in particular to a kind of centrifugal pump with independent axes envelope mechanical seal device that is particularly useful for oil drilling.
Background technique
The working procedure of centrifugal pump is that the medium that is transmitted gets in the pump case through the medium inlet of pump case, through the rotation of impeller the medium of transmission is got rid of from media outlet then, and the medium that in this process, requires to be transmitted must not be got rid of from its elsewhere or leak.At present both at home and abroad oil drilling is with the shaft sealing (being called for short axle seals) of centrifugal pump (as: sand pump, charge pump, increase the weight of pump, replenishment pump and shear pump) normally compound seal and two kinds of forms of mechanical seal.The life requirements that the axle envelope of these two kinds of forms sealing effect and durability in actual use all is difficult to reach the SY/T5612-2007 standard code.
One, as shown in Figure 3, compound sealing structure is that outside framework oil seal adds the packing filling form.The position that revealing appears in the medium transmission process in centrifugal pump is: the interface between pump case and the Seal cage; Interface between Seal cage and the Stuffing box; Transmission medium in the pump case leaks along the axle sleeve passage.Above-mentioned preceding two positions are prone to solve the transmission medium leakage problem through seal ring and sealing gasket; And the leakage of the 3rd position (i.e. axle envelope place), the sealing intractable.Reason is: the one, and the seal form that its skeleton oil sealing adds packing filling is difficult to the opposing pressure that transmission medium produced and breakdown leakage; The 2nd, outside framework oil seal and packing filling not only can make pump shaft or axle sleeve generation gap and leakage occur the serious wear of pump shaft or axle sleeve, and can make its operating temperature rising bring other quality problems.Usually come the interim transmission medium leakage problem that solves in the real work with replacing or fastening packing filling.
Two, as shown in Figure 4, the conventional machinery sealing configuration is the compensation of built-in (being also referred to as open) big spring at present, adds the mechanical seal form of packing filling.The cooling of mechanical seal and lubricated be that the medium itself that passes through to be transmitted is accomplished.Its shortcoming one is that each component of mechanical seal are invaded entirely in the medium (mud, Korrosionsmedium) of transmission, to the erosion and the seriously corroded of Sealing, causes the damage of Sealing or seal interface and the puncture leakage; The 2nd, because the compensation of coaxial running can produce bigger vibration with big spring, be easy to destroy the seal interface of mechanical seal and puncture leakage; The 3rd, the compressive strength of seal interface is lower, when the pressure of transmission medium increases (increase of transmission pipeline resistance) be difficult to resist the pressure of transmission medium and puncture leakage; The 4th, packing filling is to the serious wear of pump shaft or axle sleeve; The 5th, the mechanical seal of this kind structure can't realize open drive.The seal defect that exists on the centrifugal pump seal problem that needs to be resolved hurrily in the industry.
The model utility content
The utility model is in order to overcome deficiency of the prior art; A kind of centrifugal pump with independent axes envelope mechanical seal device is provided; The sealing of employing both-end, independent lubricated, cooling structure is kept apart medium and each component of mechanical seal of transmission fully; Constitute the independently non-maintaining axle envelope of driving type mechanical seal device, the lubricated and cooling of axle envelope mechanical seal device self is accomplished by the lubricant oil in the mechanical seal cavity.Seal defect and deficiency that compound sealing structure and conventional machinery sealing configuration exist have been solved fully on the centrifugal pump seal problem.
The utility model is for realizing above-mentioned purpose; Realize through following technological scheme; A kind of centrifugal pump with independent axes envelope mechanical seal device; Comprise pump case, impeller, Seal cage, bearing, sub-propeller and pump shaft, it is characterized in that: affixed axle envelope mechanical seal assembly on the pump shaft of said Seal cage back, the axle envelope mechanical seal assembly on said Seal cage and the pump shaft constitutes independently axle envelope mechanical seal device.
Said axle envelope mechanical seal assembly comprises mechanical seal cavity, first mechanical sealing linkage ring and first mechanical sealing static ring; Second mechanical sealing linkage ring and second mechanical sealing static ring; Mechanical seal protecgulum, mechanical seal bonnet and axle sleeve; Said mechanical seal protecgulum and mechanical seal bonnet are fixed in mechanical seal cavity front-end and back-end respectively; Said axle sleeve and pump shaft keyed jointing; Said first mechanical sealing linkage ring and first mechanical sealing static ring and second mechanical sealing linkage ring and second mechanical sealing static ring constitute friction pair respectively; Said first mechanical sealing linkage ring, first mechanical sealing static ring and second mechanical sealing linkage ring, second mechanical sealing static ring are sleeved on the axle sleeve, and said first mechanical sealing static ring and second mechanical sealing static ring are fixed in mechanical seal protecgulum and mechanical seal bonnet medial extremity respectively, and said first mechanical sealing linkage ring and second mechanical sealing linkage ring and axle sleeve are affixed.
Said first mechanical sealing linkage ring and the second mechanical sealing linkage ring inboard are provided with the O RunddichtringO.
Constitute hydraulic space between said Seal cage and the axle envelope mechanical seal assembly front-end face, affixed sub-propeller on the said pump shaft, said sub-propeller places hydraulic space.
Beneficial effect: adopt the both-end sealing, independent lubricated, cooling structure is kept apart medium and each component of mechanical seal of transmission fully, and the lubricated and cooling of mechanical seal itself is accomplished by the lubricant oil in the mechanical seal cavity.But erosion that this device resistance to pressure is strong, avoid transmission medium and burn into to pump shaft and axle sleeve do not have wearing and tearing, stable working, need not maintenance, the long service life open drive, and the axle envelope is mechanical seal assembly independently, exchange easy to assemble.On-the-spot use test through more than 2 years meets the SY/T5612-2007 standard code fully.
Description of drawings
Fig. 1 is the structural representation of the utility model;
Fig. 2 is the structural representation of independent axes envelope mechanical seal device;
Fig. 3 is the structural representation of centrifugal pump compound sealing structure;
Fig. 4 is the structural representation of centrifugal pump mechanical seal.
Among the figure: 1, pump case, 2, impeller, 3, Seal cage, 4, bearing, 5, sub-propeller, 6, pump shaft, 7, axle envelope mechanical seal assembly; 7-1, mechanical seal cavity, 7-2, mechanical seal protecgulum, 7-3, first mechanical sealing static ring; 7-4, first mechanical sealing linkage ring, 7-5, the second mechanical sealing linkage ring 7-6, second mechanical sealing static ring, 7-7, mechanical seal bonnet; 7-8, axle sleeve, 7-9,7-10, O RunddichtringO.
Embodiment
Below in conjunction with preferred embodiment; Details are as follows to the embodiment that provides according to the utility model: see accompanying drawing for details; A kind of centrifugal pump with independent axes envelope mechanical seal device; Comprise pump case 1, impeller 2, Seal cage 3, bearing 4, sub-propeller 5 and pump shaft 6, affixed axle envelope mechanical seal assembly 7 on the pump shaft of said Seal cage back, the axle envelope mechanical seal assembly on said Seal cage and the pump shaft constitutes independently axle envelope mechanical seal device.Said axle envelope mechanical seal assembly comprises mechanical seal cavity 7-1, the first mechanical sealing linkage ring 7-4 and the first mechanical sealing static ring 7-3; The second mechanical sealing linkage ring 7-5 and the second mechanical sealing static ring 7-6; Mechanical seal protecgulum 7-2, mechanical seal bonnet 7-7 and axle sleeve 7-8; Said first mechanical sealing linkage ring and first mechanical sealing static ring and second mechanical sealing linkage ring and second mechanical sealing static ring constitute friction pair respectively; Said first mechanical sealing linkage ring, first mechanical sealing static ring and second mechanical sealing linkage ring, second mechanical sealing static ring are sleeved on the axle sleeve; Said first mechanical sealing static ring and second mechanical sealing static ring are fixed in mechanical seal protecgulum and mechanical seal bonnet medial extremity respectively, and said first mechanical sealing linkage ring and second mechanical sealing linkage ring and axle sleeve are affixed.Said first mechanical sealing linkage ring and the second mechanical sealing linkage ring inboard are provided with O RunddichtringO 7-9,7-10.Constitute hydraulic space between said Seal cage and the axle envelope mechanical seal assembly front-end face, affixed sub-propeller 5 on the said pump shaft, said sub-propeller places hydraulic space.When centrifugal pump is worked; In the hydraulic space that the sub-propeller coaxial rotation forms between Seal cage and mechanical seal assembly; Guaranteeing can not have bigger influence to the mechanical seal friction pair at axle envelope place yet when the transmission medium working pressure increases, make sealing function be in the smooth working state.
Working procedure and principle: form complete mechanical seal by Seal cage, sub-propeller and axle envelope mechanical seal assembly three parts.Its axis envelope mechanical seal assembly is axle envelope mechanical seal device independently, combines the effect of sub-propeller again, realizes the sealing of driving type both-end, independent lubricating and cooling system jointly, has the open drive function.Oil hole through being located on the seal chamber injects 3/4 lubricant oil in the mechanical seal cavity; When centrifugal pump is worked; Drive axle sleeve and first mechanical sealing linkage ring and the second mechanical sealing linkage ring coaxial rotation through pump shaft; Form friction pair, second mechanical sealing linkage ring and second mechanical sealing static ring by first mechanical sealing static ring and first mechanical sealing linkage ring and form transmission medium that friction pair and O RunddichtringO will come along the axle sleeve surface seepage and the seal oil in the mechanical seal cavity, thus the medium of blocking-up transmission and the leakage of lubricant oil.Both guaranteed that each component of mechanical seal and seal interface (friction vice division chief) were not corroded by transmission medium and corrosion, guaranteed each sealing part works again in lubricant oil, formed oil film seal interface, the working life of having guaranteed mechanical seal during work.
The above only is the preferred embodiment of the utility model, is not the structure of the utility model is done any pro forma restriction.Every technical spirit according to the utility model is to any simple modification, equivalent variations and modification that above embodiment did, all still belongs in the scope of technological scheme of the utility model.
Claims (4)
1. one kind has the centrifugal pump that independent axes is sealed mechanical seal device; Comprise pump case, impeller, Seal cage, bearing, sub-propeller and pump shaft; It is characterized in that: affixed axle envelope mechanical seal assembly on the pump shaft of said Seal cage back, the axle envelope mechanical seal assembly on said Seal cage and the pump shaft constitutes independently axle envelope mechanical seal device.
2. the centrifugal pump with independent axes envelope mechanical seal device according to claim 1; It is characterized in that: said axle envelope mechanical seal assembly comprises mechanical seal cavity, first mechanical sealing linkage ring and first mechanical sealing static ring; Second mechanical sealing linkage ring and second mechanical sealing static ring; Mechanical seal protecgulum, mechanical seal bonnet and axle sleeve; Said mechanical seal protecgulum and mechanical seal bonnet are fixed in mechanical seal cavity front-end and back-end respectively; Said axle sleeve and pump shaft keyed jointing, said first mechanical sealing linkage ring and first mechanical sealing static ring and second mechanical sealing linkage ring and second mechanical sealing static ring constitute friction pair respectively, and said first mechanical sealing linkage ring, first mechanical sealing static ring and second mechanical sealing linkage ring, second mechanical sealing static ring are sleeved on the axle sleeve; Said first mechanical sealing static ring and second mechanical sealing static ring are fixed in mechanical seal protecgulum and mechanical seal bonnet medial extremity respectively, and said first mechanical sealing linkage ring and second mechanical sealing linkage ring and axle sleeve are affixed.
3. the centrifugal pump with independent axes envelope mechanical seal device according to claim 2, it is characterized in that: said first mechanical sealing linkage ring and the second mechanical sealing linkage ring inboard are provided with the O RunddichtringO.
4. the centrifugal pump with independent axes envelope mechanical seal device according to claim 1 and 2; It is characterized in that: constitute hydraulic space between said Seal cage and the axle envelope mechanical seal assembly front-end face; Affixed sub-propeller on the said pump shaft, said sub-propeller places hydraulic space.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200813200U CN202483935U (en) | 2012-03-07 | 2012-03-07 | Centrifugal pump with independent shaft-sealing mechanical sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200813200U CN202483935U (en) | 2012-03-07 | 2012-03-07 | Centrifugal pump with independent shaft-sealing mechanical sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202483935U true CN202483935U (en) | 2012-10-10 |
Family
ID=46958361
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200813200U Withdrawn - After Issue CN202483935U (en) | 2012-03-07 | 2012-03-07 | Centrifugal pump with independent shaft-sealing mechanical sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202483935U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588327A (en) * | 2012-03-07 | 2012-07-18 | 天津中海石油机械有限公司 | Centrifugal pump with independent mechanical shaft seal device |
-
2012
- 2012-03-07 CN CN2012200813200U patent/CN202483935U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588327A (en) * | 2012-03-07 | 2012-07-18 | 天津中海石油机械有限公司 | Centrifugal pump with independent mechanical shaft seal device |
| CN102588327B (en) * | 2012-03-07 | 2014-12-10 | 天津中海石油机械有限公司 | Centrifugal pump with independent mechanical shaft seal device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20121010 Effective date of abandoning: 20141210 |
|
| RGAV | Abandon patent right to avoid regrant |