CN203404122U - Impeller ring sealing device of water pump and impeller ring used for impeller ring sealing device - Google Patents
Impeller ring sealing device of water pump and impeller ring used for impeller ring sealing device Download PDFInfo
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- CN203404122U CN203404122U CN201320499236.5U CN201320499236U CN203404122U CN 203404122 U CN203404122 U CN 203404122U CN 201320499236 U CN201320499236 U CN 201320499236U CN 203404122 U CN203404122 U CN 203404122U
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- impeller
- choma
- sealing device
- water
- water pump
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/16—Sealings between pressure and suction sides
- F04D29/165—Sealings between pressure and suction sides especially adapted for liquid pumps
- F04D29/167—Sealings between pressure and suction sides especially adapted for liquid pumps of a centrifugal flow wheel
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model discloses an impeller ring sealing device of a water pump and an impeller ring used for the impeller ring sealing device. The impeller ring sealing device comprises a pump case and an impeller arranged in the pump case. A water absorption chamber and a pressurized water chamber are arranged in the pump case. The impeller is located in the pressurized water chamber. The impeller ring sealing device further comprises the impeller ring arranged on the surface of the inner wall of the pump case. The impeller ring is located between the water absorption chamber and the pressurized water chamber. One side, towards the pressurized water chamber, of the impeller ring is provided with a backflow groove in the circumferential direction. The outer edge of a water inlet of the impeller extends into the backflow groove, and a backflow gap is formed between the outer edge of the water inlet of the impeller and the backflow groove, so that high-pressure fluid in the pressurized water chamber is prevented from being leaked to the water absorption chamber, and the fluid leaked to the water absorption chamber through the gap between the pump case and the impeller flows back to the water inlet of the impeller through the backflow gap for cyclic utilization. Consequently, a great deal of leakage of the high-pressure fluid is prevented, the velocity head of the high-pressure fluid is reasonably utilized, and therefore the volume efficiency and the hydraulic efficiency of the water pump are improved.
Description
Technical field
The utility model relates to mechanical seal, hydrodynamics technology field, especially, relates to a kind of water pump mouth ring sealing device and for the choma of this device.
Background technique
The effect of choma is between impeller and pump case, to form narrow, tortuous passage, increases the flow resistance of medium, reaches the object that reduces dielectric leakage.The not frayed effect of major part on protection pump is also played in the position of centrifugal pump mouth ring, after choma wearing and tearing, can repair or more renew ring, recovers normal fit up gap, so not only economy but also easy access.
The method that existing centrifugal pump impeller and control ring seal adopt is impeller and choma to be processed into the Spielpassung of 0.3～0.5mm, owing to having gap between impeller and choma, the high pressure water spraying through impeller fails to be convened for lack of a quorum and from this gap, is back in the suction chamber of water pump, thereby causes the backflow leakage of fluid.After deliberation, impeller is directly proportional to the efficiency of water pump loss to the leakage rate between pump case, and leakage rate is larger, and the efficiency of water pump loss is higher.
With reference to Fig. 1, existing water pump comprises pump case 1 and impeller 2, is provided with suction chamber 3 and pumping chamber 4 in pump case 1, and impeller 2 is positioned at pumping chamber 4, and impeller 2 is brought the fluid entering through suction chamber 3 into pumping chamber 4 and formed high-pressure liquid under the effect of centrifugal force.Because the hydrodynamic pressure in pumping chamber 4 is higher than the pressure in suction chamber 3, the gap 6 that part high-pressure spray is known from experience between impeller 2 and choma 5 leaks in suction chamber 3, thereby causes the reduction of high-pressure liquid loss and water pump operation performance and efficiency.
Chinese Patent Application No. is that 200720185027.8 patent documentation discloses a kind of centrifugal pump impeller and mouth ring sealing device, its special way is: the water intake outer rim at impeller is provided with mechanical sealing linkage ring, in choma, be provided with mechanical sealing static ring, described mechanical sealing linkage ring is inserted in choma and contacts with mechanical sealing static ring.Chinese Patent Application No. is that 201020225527.1 patent documentation discloses a kind of sealing device for centrifugal pump impeller wear ring; comprise housing choma and impeller port ring, housing choma comprises the straight seal section of housing choma and the housing choma labyrinth seal section that is positioned at different step surfaces; Impeller port ring comprises the straight seal section of impeller port ring and the impeller port ring labyrinth seal section that is positioned at different step surfaces, the straight seal section of housing choma and impeller port ring labyrinth seal section coordinate formation labyrinth seal, and the straight seal section of housing choma labyrinth seal section and impeller port ring coordinates formation labyrinth seal.Although above-mentioned mouth ring sealing structure can effectively reduce the amount of leakage of medium between impeller and pump case, leakage rate is still larger, causes water pump waterpower hydraulic performance decline.And the consideration angle of existing control ring seal is from considering to reduce the leakage rate between pump case and impeller, the application pump housing, impeller are installed respectively choma, adopt the forms such as single labyrinth seal, two labyrinth seal or spiral chute choma to reduce the leakage rate in gap between pump case and impeller, due to the gap objective reality between impeller and pump case, inevitably cause fluid to reflux and medium energy loss, and then cause the hydraulic performance of water pump to decline.
Model utility content
The utility model object is to provide a kind of water pump mouth ring sealing device and for the choma of this device, to solve the reflux technical problem of the water pump operation hydraulic performance decline that causes of fluid leakage between existing water pump pump case and impeller.
For achieving the above object, the technical solution adopted in the utility model is as follows
A kind of water pump mouth ring sealing device; comprise pump case and be located at the impeller in pump case; in pump case, be provided with suction chamber for intaking and for the pumping chamber of water outlet; impeller is positioned at pumping chamber; also comprise the choma of being located on pump housing endophragm face; choma is between suction chamber and pumping chamber, and choma upwards offers back flash towards a side of pumping chamber in week; The water intake outer rim of impeller stretches in back flash, and and back flash between form backflow gap.
Further, back flash inside is also provided with the protuberance towards pumping chamber projection, and the water intake outer rim of impeller is provided with the groove with protuberance corresponding matching.
Further, the cross section of protuberance is rectangle or taper.
Further, protuberance is in the continuous distributed or spaced apart that makes progress in the week of choma.
Further, choma is being provided with arc-shaped transition limit towards suction chamber one side on outer radial internal diameter direction.
Further, water pump is centrifugal pump.
According on the other hand of the present utility model, a kind of choma is also provided, for the water inlet of impeller on water pump, a side of choma offers the back flash that forms backflow gap for the water intake outer rim with impeller.
Further, back flash inside is also provided with protuberance.
Further, the cross section of protuberance is rectangle or taper.
Further, protuberance is in the continuous distributed or spaced apart that makes progress in the week of choma.
Further, the opposite side of choma is provided with arc-shaped transition limit from outer radial internal diameter direction.
The utlity model has following beneficial effect:
The utility model water pump mouth ring sealing device and for the choma of this device, by upwards offering back flash at choma towards the week of a side of pumping chamber, the water intake outer rim that is positioned at the impeller of pumping chamber stretches into back flash, and form backflow gap between water intake outer rim and back flash, not only avoided the high-pressure liquid that is positioned at pumping chamber to leak to suction chamber, the water intake that also clearance leakage between former herbal classic pump case and impeller to the fluid of suction chamber is back to impeller through backflow gap recycles, both a large amount of leakages of high-pressure liquid had been avoided, rationally utilized again the velocity head of high-pressure liquid, thereby volumetric efficiency and the hydraulic efficiency of water pump have been improved.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model is used for explaining the utility model, does not form improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of water pump mouth ring sealing device in prior art;
Fig. 2 is the structural representation of the utility model water pump mouth ring sealing device preferred embodiment one;
Fig. 3 is the structural representation of the utility model water pump mouth ring sealing device preferred embodiment two;
Fig. 4 is the structural representation of the utility model water pump mouth ring sealing device preferred embodiment three;
Fig. 5 is the utility model choma embodiment one side structure schematic diagram;
Fig. 6 is the utility model choma embodiment two side structure schematic diagram; And
Fig. 7 is the utility model choma embodiment three side structure schematic diagram.
Description of reference numerals
10, pump case; 20, impeller; 21, water intake outer rim; 22, groove;
30, suction chamber; 40, pumping chamber; 50, choma; 51, back flash;
52, protuberance; 53, arc-shaped transition limit; 60, backflow gap.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is elaborated, but the multitude of different ways that the utility model can be defined by the claims and cover is implemented.
With reference to Fig. 2, preferred embodiment one of the present utility model provides a kind of water pump mouth ring sealing device, comprises pump case 10 and is located at the impeller 20 in pump case 10.In pump case 10, be provided with suction chamber 30 for intaking and for the pumping chamber 40 of water outlet; impeller 20 is positioned at pumping chamber 40; also comprise the choma 50 of being located on pump case 10 internal faces; choma 50 is between suction chamber 30 and pumping chamber 40, and choma 50 upwards offers back flash 51 towards a side of pumping chamber 40 in week; The water intake outer rim 21 of impeller 20 stretches in back flash 51, and and back flash 51 between form backflow gap 60.During pump working, impeller 20 rotates under the drive of live axle in pump case 10, the MEDIA FLOW that is converted to high pressure under the effect of the centrifugal force that the fluid that is positioned at suction chamber 30 produces at impeller 20 High Rotation Speeds enters pumping chamber 40, and then the position output to eminence by the liquid lift of low water level.In the utility model embodiment, because the water intake outer rim 21 of impeller 20 stretches in back flash 51, and between water intake outer rim 21 and back flash 51, form backflow gap 60, the high-pressure medium that makes to enter in pumping chamber 40 is back in the water inlet passageway of impeller 20 through the return flow path of backflow gap 60.Like this, not only avoided the high-pressure liquid that is positioned at pumping chamber 40 to leak in a large number suction chamber 30, the water intake that also clearance leakage between former herbal classic pump case 10 and impeller 20 to the fluid of suction chamber 30 is back to impeller 20 through backflow gap 60 recycles, both a large amount of leakages of high-pressure liquid had been avoided, rationally utilized again the velocity head of high-pressure liquid, thereby volumetric efficiency and the hydraulic efficiency of water pump have been improved, and to recycling of high-pressure liquid, avoided the high-pressure liquid originally leaking the fluid of suction chamber 30 to be flowed into the interference effect of impeller 20, reduced the turbulent flow of suction chamber 30 inner fluids, eddy current, reduced operating noise, and flow and the lift of water pump have been improved.
And in the face of the technical problems to be solved in the utility model, the usual mentality of designing adopting of those skilled in the art is: from considering to reduce the leakage rate between pump case 10 and impeller 20, on pump case 10, impeller 20, choma is installed respectively, is adopted the forms such as single labyrinth seal, two labyrinth seal or spiral chute choma to reduce the leakage rate that between pump case 10 and impeller 20, gap causes.Because impeller 20 will rotate with respect to pump case 10, gap objective reality between impeller 20 and pump case 10, inevitably cause fluid to reflux and medium energy loss, and then cause the hydraulic performance of water pump to decline, therefore, the utility model water pump mouth ring sealing device, employing is the scheme in backflow gap 60 is back to the water inlet passageway of impeller 20 by high-pressure leakage fluid, solved the technical barrier how related domain avoids high-pressure liquid that gap between pump case 10 and impeller 20 causes to leak, and the energy by former herbal classic clearance leakage to the velocity head of the high-pressure liquid of suction chamber 30 uses well, both avoided fluid leakage loss, improved again the hydraulic efficiency of water pump.Through test comparison, adopt the efficiency of the water pump of the utility model embodiment water pump mouth ring sealing device on average to improve more than 2%, for the efficiency of low specific speed pump, can be increased to more than 6%.And the utility model embodiment water pump mouth ring sealing device is simple in structure, and reforming cost is cheap, be suitable for producing in enormous quantities and extensive use, effects of energy saving and emission reduction is remarkable, in industrial and agricultural production field, can bring significant economic benefit.
Preferably, in embodiment one, on choma 50, with respect to the opposite side that offers back flash 51, from outer radial internal diameter direction, be provided with arc-shaped transition limit 53, has played the effect in the inlet channel of the fluid importing impeller 20 in suction chamber 30 on this arc-shaped transition limit 53, and the turbulent flow that has reduced fluid impacts and hydraulic loss.
Fig. 3 shows the utility model water pump mouth ring sealing device embodiment two structural representation.With reference to Fig. 3, embodiment two is with embodiment one difference: back flash 51 inside are also provided with the protruding protuberance 52 to pumping chamber 40, and correspondingly, the water intake outer rim 21 of impeller 20 is provided with the groove 22 matching with protuberance 52.Like this, the water intake outer rim 21 of impeller 20 stretches in back flash 51, and and back flash 51 between form backflow gap 60 return flow path further extended, thereby reduced the leakage rate of pumping chamber 40 inner high voltage fluids, and the high-pressure liquid leaking also can be in backflow gap 60 be back to the water inlet passageway of impeller 20, thereby recycled, to improve volumetric efficiency and the hydraulic efficiency of water pump.In the present embodiment, the cross section of protuberance 52 is rectangle, and preferably, the protuberance 52 that cross section is rectangle is in the continuous distributed or spaced apart that makes progress in the week of choma 50.
Fig. 4 shows the utility model water pump mouth ring sealing device embodiment three structural representation.With reference to Fig. 4, embodiment three is with embodiment two difference: the cross section of the back flash 51 inner protuberances 52 that arrange is taper, between the groove 22 that water intake outer rim 21 places of protuberance 52 and impeller 20 arrange, also form matching gap, thereby the return flow path of the backflow gap 60 between the water intake outer rim 21 of impeller 20 and the back flash 51 of choma 50 is extended, reduced the leakage rate of pumping chamber 40 inner high voltage fluids, and the high-pressure liquid leaking also can be in backflow gap 60 be back to the water inlet passageway of impeller 20, thereby recycled, to improve volumetric efficiency and the hydraulic efficiency of water pump.Preferably, the protuberance 52 that cross section is taper is in the continuous distributed or spaced apart that makes progress in the week of choma 50.Certainly; it will be appreciated by those skilled in the art that; the cross section that is arranged at the protuberance 52 of back flash 51 inside can also be triangle or other analogous shapes; as long as make the return flow path of the backflow gap 60 between the water intake outer rim 21 of impeller 20 and the back flash 51 of choma 50 obtain extending; therefore, backflow gap 60 is designed to other shapes and also belongs to protection category of the present utility model.
Water pump in the utility model embodiment is centrifugal pump, and preferably, the centrifugal pump in the utility model embodiment is double-suction centrifugal pump, and the water inlet, two sides of impeller 20 is equipped with choma 50.Certainly, it will be understood by those skilled in the art that water pump can also select multistage centrifugal pump.
According on the other hand of the present utility model, also provide a kind of choma, for the water inlet of impeller on water pump, in case the high-pressure liquid that the gap between uppermost leaf wheel and pump case causes leaks the pump performance loss causing.With reference to Fig. 5, a side of choma 50 offers the back flash 51 that forms backflow gap 60 for the water intake outer rim 21 with impeller 20.Like this, between the water intake outer rim 21 of impeller 20 and the back flash 51 of choma 50, form backflow gap 60, with the fluid that the script that between impeller 20 and pump case 10, gap causes is leaked, be back in the water inlet passageway of impeller 20.Preferably, the opposite side of choma 50 is provided with arc-shaped transition limit 53 from outer radial internal diameter direction.
With reference to Fig. 6, preferably, for the return flow path of the backflow gap 60 between the water intake outer rim 21 of impeller 20 and the back flash 51 of choma 50 is extended, to have reduced the leakage rate of pumping chamber 40 inner high voltage fluids, in back flash 51 inside, be also provided with protuberance 52.The cross section of this protuberance 52 is rectangle, taper, triangle or other analogous shapes, as long as make the return flow path of the backflow gap 60 between the water intake outer rim 21 of impeller 20 and the back flash 51 of choma 50 obtain extending.
With reference to Fig. 7, preferably, protuberance 52 is in the continuous distributed or spaced apart that makes progress in the week of choma 50.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.
Claims (11)
1. a water pump mouth ring sealing device, comprise pump case (10) and be located at the impeller (20) in described pump case (10), in described pump case (10), be provided with suction chamber (30) for intaking and for the pumping chamber (40) of water outlet, described impeller (20) is positioned at described pumping chamber (40), it is characterized in that
Also comprise the choma (50) of being located on described pump case (10) internal face; described choma (50) is positioned between described suction chamber (30) and described pumping chamber (40), and described choma (50) is upwards offering back flash (51) week towards a side of described pumping chamber (40); The water intake outer rim (21) of described impeller (20) stretches in described back flash (51), and and described back flash (51) between form backflow gap (60).
2. water pump mouth ring sealing device according to claim 1, is characterized in that,
Described back flash (51) inside is also provided with the protuberance (52) towards described pumping chamber (40) projection, and the water intake outer rim (21) of described impeller (20) is provided with the groove (22) with described protuberance (52) corresponding matching.
3. water pump mouth ring sealing device according to claim 2, is characterized in that,
The cross section of described protuberance (52) is rectangle or taper.
4. water pump mouth ring sealing device according to claim 3, is characterized in that,
Described protuberance (52) is in the continuous distributed or spaced apart that makes progress in week of described choma (50).
5. water pump mouth ring sealing device according to claim 1, is characterized in that,
Described choma (50) is being provided with arc-shaped transition limit (53) towards described suction chamber (30) one sides on outer radial internal diameter direction.
6. according to the water pump mouth ring sealing device described in claim 1 to 5 any one, it is characterized in that,
Described water pump is centrifugal pump.
7. a choma, the water inlet for impeller on water pump, is characterized in that,
One side of described choma (50) offers the back flash (51) that forms backflow gap (60) for the water intake outer rim (21) with described impeller (20).
8. choma according to claim 7, is characterized in that,
Described back flash (51) inside is also provided with protuberance (52).
9. choma according to claim 8, is characterized in that,
The cross section of described protuberance (52) is rectangle or taper.
10. choma according to claim 9, is characterized in that,
Described protuberance (52) is in the continuous distributed or spaced apart that makes progress in week of described choma (50).
11. according to the choma described in claim 7 to 10 any one, it is characterized in that,
The opposite side of described choma (50) is provided with arc-shaped transition limit (53) from outer radial internal diameter direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499236.5U CN203404122U (en) | 2013-08-15 | 2013-08-15 | Impeller ring sealing device of water pump and impeller ring used for impeller ring sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320499236.5U CN203404122U (en) | 2013-08-15 | 2013-08-15 | Impeller ring sealing device of water pump and impeller ring used for impeller ring sealing device |
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| CN203404122U true CN203404122U (en) | 2014-01-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320499236.5U Expired - Lifetime CN203404122U (en) | 2013-08-15 | 2013-08-15 | Impeller ring sealing device of water pump and impeller ring used for impeller ring sealing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398020A (en) * | 2013-08-15 | 2013-11-20 | 长沙山水节能研究院有限公司 | Water pump wear-ring sealing device and wear-ring thereof |
| CN108869384A (en) * | 2018-05-02 | 2018-11-23 | 江苏大学 | A kind of centrifugal pump radial seal ring with cylindrical type guide vane |
| CN113309732A (en) * | 2021-05-31 | 2021-08-27 | 景德镇学院 | Gas conveying device |
| CN114562716A (en) * | 2022-02-28 | 2022-05-31 | 江西南方锅炉股份有限公司 | Steam boiler system with air blowing mechanism |
-
2013
- 2013-08-15 CN CN201320499236.5U patent/CN203404122U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398020A (en) * | 2013-08-15 | 2013-11-20 | 长沙山水节能研究院有限公司 | Water pump wear-ring sealing device and wear-ring thereof |
| CN108869384A (en) * | 2018-05-02 | 2018-11-23 | 江苏大学 | A kind of centrifugal pump radial seal ring with cylindrical type guide vane |
| CN113309732A (en) * | 2021-05-31 | 2021-08-27 | 景德镇学院 | Gas conveying device |
| CN114562716A (en) * | 2022-02-28 | 2022-05-31 | 江西南方锅炉股份有限公司 | Steam boiler system with air blowing mechanism |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140122 |