CN203067338U - High pressure centrifugal pump maze seal device - Google Patents
High pressure centrifugal pump maze seal device Download PDFInfo
- Publication number
- CN203067338U CN203067338U CN 201220716769 CN201220716769U CN203067338U CN 203067338 U CN203067338 U CN 203067338U CN 201220716769 CN201220716769 CN 201220716769 CN 201220716769 U CN201220716769 U CN 201220716769U CN 203067338 U CN203067338 U CN 203067338U
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- rotating ring
- sealing tooth
- circle
- ring sealing
- high pressure
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
Abstract
The utility model discloses a high pressure centrifugal pump maze seal device which comprises a movable ring and a static ring, wherein the outer side of the movable ring is axially provided with an oil baffling ring and a plurality of movable ring seal teeth, outer grooves are formed between the movable ring seal teeth and the oil baffling ring and between adjacent movable ring seal teeth, and the groove bottom depths of the outer grooves are in a gradually-decreased ladder shape. The inner side of the static ring is axially provided with static ring seal teeth, an inner groove is formed between each two adjacent static ring seal teeth, and the groove bottom depths of the inner grooves are in a gradually-increased ladder shape. By means of the inner grooves and the outer grooves which are ladder-shaped, the direction of fluid can be forcefully changed, kinetic energy of the fluid is converted into the friction effect and the striation shrink effect, remaining fluid entering the next gap is reduced, and therefore oil leakage is effectively prevented. As at least three rows of movable ring seal teeth are arranged, the fact that the static ring slides out and is separated from the movable ring because of movement can be avoided. By means of the wedge-shaped static ring seal teeth, the friction effect and the striation shrink effect can be enhanced, and prevention of oil leakage is benefited.
Description
Technical field
The utility model relates to labyrinth seal, more particularly, relates to a kind of high pressure centrifugal pump labyrinth gland.
Background technique
At present, the descaling pump that the high pressure descaling system of metallurgy industry hot rolling unit uses is generally multistage high pressure centrifugal pump, and the pump shaft that impeller is rotated is to support its rotation by bearing.Because the employed medium of multistage centrifugal pump impeller part is water, and the lubricant medium of bearing is oil, and can not mix between water and the oil, so will be separated by transitioning end between the pump housing and the bearing housing in the design, what the sealing at its bearing housing place was adopted is mechanical labyrinth gland, see also Fig. 1, shown in Figure 2, comprise and being sheathed on the pump shaft and by the fixing rotating ring circle 10 of screw 11 and cooperate the stationary ring circle of being located on the rotating ring circle 10 20, rotating ring circle 10 outboard shafts have contour outer groove 14 to being provided with flinger ring 12 and twice rotating ring sealing tooth 13 successively between rotating ring sealing tooth 13 and the flinger ring 12 and between the adjacent rotating ring sealing tooth 13; Stationary ring circle 20 inner shafts have contour inner groovy 22 to being provided with the three road stationary ring sealing teeth 21 that match with rotating ring sealing tooth 13 successively between the adjacent stationary ring sealing tooth 21.And this seal arrangement in actual use, cause the screw 11 of rotating ring circle 10 loosening easily owing to play, rotating ring circle 10 is produced to endwisely slip, cause the final stage stationary ring sealing tooth 21 of stationary ring circle 20 to throw off with rotating ring circle 10, can't form the cavity sealing, make the seal action of final stage stationary ring sealing tooth 21 disappear, cause oil leakage phenomenon to occur often, and then cause a large amount of lubricant oil to run off, cause the increase of environmental pollution and cost of production.
The model utility content
At the above-mentioned shortcoming that exists in the prior art, the purpose of this utility model provides a kind of high pressure centrifugal pump labyrinth gland, can effectively avoid seal action to disappear, and prevents leakage of oil.
For achieving the above object, the utility model adopts following technological scheme:
This high pressure centrifugal pump labyrinth gland, comprise and be sheathed on the pump shaft and be located at stationary ring circle on the rotating ring circle by the fixing rotating ring circle of screw and cooperation, also be provided with O type circle in the rotating ring circle, described rotating ring circle outboard shafts is to being provided with flinger ring and several rotating ring sealing tooth successively, has outer groove between rotating ring sealing tooth and the flinger ring and between the adjacent rotating ring sealing tooth, and be stepped that the bottom land degree of depth successively decreases gradually between the outer groove; Stationary ring circle inner shafts has inner groovy between the adjacent stationary ring sealing tooth, and is stepped that the bottom land degree of depth increases progressively gradually between the outer groove to being provided with the stationary ring sealing tooth that matches with rotating ring sealing tooth successively.
The quantity of described rotating ring sealing tooth be at least three roads, and the quantity that described stationary ring seals tooth also is at least three roads accordingly.
Described rotating ring sealing tooth is rectangular teeth, and described stationary ring seals the chisel teeth that is of tooth.
The width of described outer groove is greater than the width of the stationary ring sealing tooth of correspondence; The width of described inner groovy is greater than the width of the rotating ring sealing tooth of correspondence.
Described stationary ring circle is half slide structure.
In technique scheme, high pressure centrifugal pump labyrinth gland of the present utility model comprises rotating ring circle and stationary ring circle, rotating ring circle outboard shafts is to being provided with flinger ring and several rotating ring sealing tooth successively, has outer groove between rotating ring sealing tooth and the flinger ring and between the adjacent rotating ring sealing tooth, and be stepped that the bottom land degree of depth successively decreases gradually between the outer groove; Stationary ring circle inner shafts has inner groovy between the adjacent stationary ring sealing tooth, and is stepped that the bottom land degree of depth increases progressively gradually between the outer groove to being provided with the stationary ring sealing tooth that matches with rotating ring sealing tooth successively.By stair-stepping inside and outside groove, can the forcibly changing flow direction, make the kinetic energy of fluid be converted into frictional resistance effect and a fluid stream blockage effect, reduce residual current and enter next backlash, thereby realize effectively preventing leakage of oil.By at least three road rotating ring sealing teeth are set, can avoid skidding off disengagement because play causes stationary ring circle and rotating ring circle.Stationary ring sealing tooth by wedge shape can increase frictional resistance effect and a fluid stream blockage effect, more is conducive to prevent leakage of oil.
Description of drawings
Fig. 1 is the view sub-anatomy of the seal arrangement of prior art;
Fig. 2 is the assembling view of the seal arrangement of prior art;
Fig. 3 is the view sub-anatomy of seal arrangement of the present utility model;
Fig. 4 is the assembling view of seal arrangement of the present utility model;
Fig. 5 is a fluid stream line schematic representation that fluid passes through backlash sealing of the present utility model.
Embodiment
Further specify the technical solution of the utility model below in conjunction with drawings and Examples.
See also Fig. 3～shown in Figure 4, high pressure centrifugal pump labyrinth gland of the present utility model comprises and being sheathed on the pump shaft and by the fixing rotating ring circle 30 of screw 31 and cooperate the stationary ring circle of being located on the rotating ring circle 30 40, also be provided with O type circle 15 in the rotating ring circle 30, described rotating ring circle 30 outboard shafts are to being provided with flinger ring 32 and several rotating ring sealing tooth 33 successively, between rotating ring sealing tooth 33 and the flinger ring 32 and adjacent rotating ring seal between the tooth 33 and have outer groove 34, and be stepped that the bottom land degree of depth successively decreases gradually between the outer groove 34; Stationary ring circle 40 inner shafts have inner groovy 42 between the adjacent stationary ring sealing tooth 41, and are stepped that the bottom land degree of depth increases progressively gradually between the outer groove 34 to being provided with the stationary ring sealing tooth 41 that matches with rotating ring sealing tooth 33 successively.The quantity of described rotating ring sealing tooth 33 be at least three roads (quantity among Fig. 3, Fig. 4 is three roads), and the quantity that described stationary ring seals tooth 41 also is at least three roads accordingly.Described rotating ring sealing tooth 33 is rectangular teeth, and described stationary ring sealing tooth 41 is chisel teeth, carries out chamfered as the basis at rectangular teeth, can form wedge shape.The width of described outer groove 34 is greater than the width of the stationary ring sealing tooth 41 of correspondence; The width of described inner groovy 42 is greater than the width of the rotating ring sealing tooth 33 of correspondence.Described stationary ring circle 40 is half slide structure, is convenient to suit.
Because labyrinth seal is the cavity by sealing tooth and backlash and concave surface formation, causing fluid increases at the cavity internal volume through the slit, form very strong vortex, hinder that fluid flows and the reduction of pressure, and fluid is every through gap and big cavity subsequently, fluid just is subjected to a throttling and dilatation and since eddy loss energy, hydrodynamic pressure constantly descends.So fluid is through after sealing tooth, its pressure descends one by one, and along with pressure reduces, fluid leaks and reduces.By said process as can be known, labyrinth seal is to utilize the increase local losses to stop fluid to external leakage with the method that consumes its energy, and therefore, the road number of sound annular space will directly influence the performance of its sealing.Therefore, by adopting the above-mentioned stepped structure of between cog groove, can the forcibly changing flow direction, make the kinetic energy of fluid be converted into frictional resistance effect and a fluid stream blockage effect, reduce residual current and enter next backlash, thereby reach better sealing effect, and, by increasing at least one rotating ring sealing tooth 33, can effectively avoid skidding off disengagement because play causes the stationary ring sealing tooth 41 of stationary ring circle 40 final stages with rotating ring circle 30, thereby guarantee the effect of per pass sealing in service.In addition, because when leak fluid flows in the labyrinth, because fluid viscosity produces friction, flow velocity is slowed down, flow (leakage rate) reduces, and fluid is by labyrinth teeth slot mouth, can produce contraction because of the influence of inertia, a fluid stream cross section diminishes, so the flow of labyrinth sealing, with the shape in gap, the shape of tooth top is relevant with the roughness of wall.And the sectional shape of the flow channel by changing fluid changes the number of bends in labyrinth and the geometrical shape of tooth top and can improve the sealing effect of mechanical seal, reduces leakage rate.Please in conjunction with shown in Figure 5, therefore, the utility model can improve resistance and difference pressuring loss by adopting the stationary ring sealing tooth 41 of wedge shape, reduces leakage rate, thereby better realizes the frictional resistance effect of labyrinth seal and the blockage effect of a fluid stream.
Those of ordinary skill in the art will be appreciated that, above embodiment illustrates the utility model, and be not to be used as restriction of the present utility model, as long as in connotation scope of the present utility model, all will drop in claims scope of the present utility model the above embodiment's variation, modification.
Claims (5)
1. high pressure centrifugal pump labyrinth gland comprises being sheathed on the pump shaft and being located at stationary ring circle on the rotating ring circle by the fixing rotating ring circle of screw and cooperation, also is provided with O type circle in the rotating ring circle, it is characterized in that:
Described rotating ring circle outboard shafts has outer groove to being provided with flinger ring and several rotating ring sealing tooth successively between rotating ring sealing tooth and the flinger ring and between the adjacent rotating ring sealing tooth, and is stepped that the bottom land degree of depth successively decreases gradually between the outer groove; Stationary ring circle inner shafts has inner groovy between the adjacent stationary ring sealing tooth, and is stepped that the bottom land degree of depth increases progressively gradually between the outer groove to being provided with the stationary ring sealing tooth that matches with rotating ring sealing tooth successively.
2. the high pressure centrifugal pump labyrinth gland described in claim 1 is characterized in that:
The quantity of described rotating ring sealing tooth be at least three roads, and the quantity that described stationary ring seals tooth also is at least three roads accordingly.
3. the high pressure centrifugal pump labyrinth gland described in claim 1 is characterized in that:
Described rotating ring sealing tooth is rectangular teeth, and described stationary ring seals the chisel teeth that is of tooth.
4. the high pressure centrifugal pump labyrinth gland described in claim 1 is characterized in that:
The width of described outer groove is greater than the width of the stationary ring sealing tooth of correspondence; The width of described inner groovy is greater than the width of the rotating ring sealing tooth of correspondence.
5. the high pressure centrifugal pump labyrinth gland described in claim 1 is characterized in that:
Described stationary ring circle is half slide structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220716769 CN203067338U (en) | 2012-12-21 | 2012-12-21 | High pressure centrifugal pump maze seal device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220716769 CN203067338U (en) | 2012-12-21 | 2012-12-21 | High pressure centrifugal pump maze seal device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203067338U true CN203067338U (en) | 2013-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220716769 Expired - Fee Related CN203067338U (en) | 2012-12-21 | 2012-12-21 | High pressure centrifugal pump maze seal device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203067338U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075520A (en) * | 2013-01-18 | 2013-05-01 | 沈阳航空航天大学 | Novel highly-stable-dislocation oval sealing structure |
| CN103821944A (en) * | 2013-11-13 | 2014-05-28 | 沪东重机有限公司 | Labyrinth-sealing scrapper ring |
| CN105201898A (en) * | 2015-10-24 | 2015-12-30 | 车晋绥 | Rubber pump novel water seal ring |
| CN109538765A (en) * | 2018-11-05 | 2019-03-29 | 西安交通大学 | A kind of reeded low amount of leakage straight-through labyrinth device of band |
| CN110425287A (en) * | 2019-09-05 | 2019-11-08 | 张家港市众利机电制造有限公司 | A kind of labyrinth ring structure that dust seal effect is good |
-
2012
- 2012-12-21 CN CN 201220716769 patent/CN203067338U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075520A (en) * | 2013-01-18 | 2013-05-01 | 沈阳航空航天大学 | Novel highly-stable-dislocation oval sealing structure |
| CN103075520B (en) * | 2013-01-18 | 2015-08-26 | 沈阳航空航天大学 | The oval sealing configuration of a kind of Novel high stability dislocation |
| CN103821944A (en) * | 2013-11-13 | 2014-05-28 | 沪东重机有限公司 | Labyrinth-sealing scrapper ring |
| CN103821944B (en) * | 2013-11-13 | 2016-04-20 | 沪东重机有限公司 | A kind of labyrinth sealing scraper ring |
| CN105201898A (en) * | 2015-10-24 | 2015-12-30 | 车晋绥 | Rubber pump novel water seal ring |
| CN109538765A (en) * | 2018-11-05 | 2019-03-29 | 西安交通大学 | A kind of reeded low amount of leakage straight-through labyrinth device of band |
| CN109538765B (en) * | 2018-11-05 | 2021-02-02 | 西安交通大学 | Low leakage straight-through labyrinth sealing device with groove |
| CN110425287A (en) * | 2019-09-05 | 2019-11-08 | 张家港市众利机电制造有限公司 | A kind of labyrinth ring structure that dust seal effect is good |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130717 Termination date: 20151221 |
|
| EXPY | Termination of patent right or utility model |