CN103398020A - Water pump wear-ring sealing device and wear-ring thereof - Google Patents
Water pump wear-ring sealing device and wear-ring thereof Download PDFInfo
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- CN103398020A CN103398020A CN2013103558725A CN201310355872A CN103398020A CN 103398020 A CN103398020 A CN 103398020A CN 2013103558725 A CN2013103558725 A CN 2013103558725A CN 201310355872 A CN201310355872 A CN 201310355872A CN 103398020 A CN103398020 A CN 103398020A
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- impeller
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Abstract
The invention discloses a water pump wear-ring sealing device and a wear-ring thereof. The water pump wear-ring sealing device comprises a pump casing and an impeller arranged in the pump casing as well as the wear-ring arranged on the inner wall surface of the pump casing, wherein a water absorption chamber and a water pressing chamber are arranged in the pump casing; the impeller is located in the water pressing chamber; the wear-ring is located between the water absorption chamber and the water pressing chamber; a backflow groove is formed in the periphery of one side of the wear-ring, which faces the water pressing chamber; the outer edge of the water inlet of the impeller extends into the backflow groove; a backflow gap is formed between the backflow groove and the water inlet of the impeller. According to the invention, the backflow gap is formed between the outer edge of the water inlet of the impeller and the backflow groove of the wear-ring, the situation that a high-pressure liquid is leaked to the water absorption chamber is avoided, besides, the liquid leaked to the water absorption chamber via the gap between the pump casing and the impeller returns to the water inlet of the impeller via the backflow gap for recycling, so that not only is large amount of leakage of the high-pressure liquid avoided, but also the velocity head of the high-pressure liquid is reasonably utilized, and the volumetric efficiency and the hydraulic efficiency of a water pump are improved.
Description
Technical field
The present invention relates to mechanical seal, hydrodynamics technology field, especially, relate to a kind of water pump mouth ring sealing device and reach the choma for 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 purpose that reduces dielectric leakage.The not frayed effect of major part on the 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 to the Spielpassung of 0.3～0.5mm, owing between impeller and choma, having gap, through the high pressure water of impeller ejection, fail to be convened for lack of a quorum and from this gap, be back in the suction chamber of water pump, thereby cause 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 namely 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, in pump case 1, is provided with suction chamber 3 and pumping chamber 4, and impeller 2 is positioned at pumping chamber 4, and impeller 2 will be brought pumping chamber 4 into and form high-pressure liquid under the effect of fluid at centrifugal force that suction chamber 3 enters.Higher than the pressure in suction chamber 3, the gap 6 that the part high-pressure spray is known from experience between impeller 2 and choma 5 leaks in suction chamber 3 due to the hydrodynamic pressure in pumping chamber 4, thereby causes the reduction of high-pressure liquid loss and water pump operation performance and efficiency.
Chinese patent application number 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 number 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, the 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 the impeller port ring that is positioned at different step surfaces and impeller port ring labyrinth seal section, the straight seal section of housing choma and impeller port ring labyrinth seal section coordinate the formation labyrinth seal, and the straight seal section of housing choma labyrinth seal section and impeller port ring coordinates the 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 of pump case and impeller gap, due to the gap objective reality between impeller and pump case, inevitably cause fluid to reflux and the medium energy loss, and then cause the hydraulic performance of water pump to descend.
Summary of the invention
The object of the invention is to provide a kind of water pump mouth ring sealing device to reach the choma for this device, to solve the technical problem of the water pump operation hydraulic performance decline that between existing water pump pump case and impeller, the fluid leakage backflow causes.
For achieving the above object, the technical solution used in the present invention is as follows:
A kind of water pump mouth ring sealing device, comprise pump case and be located at the impeller in pump case, the suction chamber that is provided with in pump case for water inlet reaches the pumping chamber for water outlet, impeller is positioned at pumping chamber, also comprise the choma of being located on the 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 also is provided with the protuberance towards the pumping chamber projection, and the water intake outer rim of impeller is provided with the groove with the 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 the arc-shaped transition limit towards suction chamber one side on the outer radial internal diameter direction.
Further, water pump is centrifugal pump.
According to a further aspect in the invention, also provide a kind of choma, 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 also is 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 the arc-shaped transition limit from the outer radial internal diameter direction.
The present invention has following beneficial effect:
water pump mouth ring sealing device of the present invention reaches the choma for this device, by at choma, towards the week of a side of pumping chamber, upwards offering back flash, 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, the high-pressure liquid of not only having avoided being positioned at pumping chamber leaks to suction chamber, also the fluid of the clearance leakage between former herbal classic pump case and impeller to suction chamber recycled through the water intake that backflow gap is back to impeller, a large amount of leakages of high-pressure liquid had both 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 purpose described above, feature and advantage, the present invention also has other purpose, feature and advantage.Below with reference to figure, the present invention is further detailed explanation.
The accompanying drawing explanation
The accompanying drawing that forms the application's a part is used to provide a further understanding of the present invention, and schematic description and description of the present invention the present invention does not form inappropriate limitation of the present invention for explaining.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 water pump mouth ring sealing device preferred embodiment one of the present invention;
Fig. 3 is the structural representation of water pump mouth ring sealing device preferred embodiment two of the present invention;
Fig. 4 is the structural representation of water pump mouth ring sealing device preferred embodiment three of the present invention;
Fig. 5 is choma embodiment's one of the present invention side structure schematic diagram;
Fig. 6 is choma embodiment's two of the present invention side structure schematic diagram; And
Fig. 7 is choma embodiment's three of the present invention 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, embodiments of the invention are elaborated, but the multitude of different ways that the present invention can be defined by the claims and cover is implemented.
With reference to Fig. 2, the preferred embodiments of the present invention one provide a kind of water pump mouth ring sealing device, comprise pump case 10 and are located at the impeller 20 in pump case 10.In pump case 10, be provided with the pumping chamber 40 that reaches for water outlet for the suction chamber 30 of intaking, 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 is rotating under the drive of live axle in pump case 10, the fluid that is positioned at suction chamber 30 is converted to high pressure under the effect of the centrifugal force that impeller 20 High Rotation Speeds produce MEDIA FLOW enters pumping chamber 40, and then by the position output of the liquid lift of low water level to eminence.In the embodiment of the present invention, 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, make the high-pressure medium that enters in pumping chamber 40 be back in the water inlet passageway of impeller 20 through the return flow path of backflow gap 60.like this, the high-pressure liquid of not only having avoided being positioned at pumping chamber 40 leaks to suction chamber 30 in a large number, also the fluid of the clearance leakage between former herbal classic pump case 10 and impeller 20 to suction chamber 30 recycled through the water intake that backflow gap 60 is back to impeller 20, a large amount of leakages of high-pressure liquid had both 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 that originally leaks the fluid of suction chamber 30 to be flowed into to 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 problem to be solved in the present invention, the usual mentality of designing that adopts 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 pump case 10 and impeller 20 gaps cause.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 the medium energy loss, and then cause the hydraulic performance of water pump to descend, therefore, water pump mouth ring sealing device of the present invention, employing is by the scheme of high-pressure leakage fluid in backflow gap 60 is back to the water inlet passageway of impeller 20, 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 of former herbal classic clearance leakage to the velocity head of the high-pressure liquid of suction chamber 30 used well, both avoided the fluid leakage loss, improved again the hydraulic efficiency of water pump.Through the test comparison, adopt the efficiency of the water pump of embodiment of the present invention 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 embodiment of the present invention water pump mouth ring sealing device is simple in structure, and reforming cost is cheap, is suitable for producing in enormous quantities and extensive use, and effects of energy saving and emission reduction is remarkable, in the 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 the outer radial internal diameter direction, be provided with arc-shaped transition limit 53, has played the effect in the inlet channel of the importing of the fluid in suction chamber 30 impeller 20 on this arc-shaped transition limit 53, and the turbulent flow that has reduced fluid impacts and hydraulic loss.
Fig. 3 shows water pump mouth ring sealing device embodiment's two of the present invention structural representation.With reference to Fig. 3, embodiment two is with embodiment one difference: back flash 51 inside also are provided with protruding protuberance to pumping chamber 40 52, and correspondingly, the water intake outer rim 21 of impeller 20 is provided with the groove 22 that matches 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 that leaks 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, cross section is that the protuberance 52 of rectangle is in the continuous distributed or spaced apart that makes progress in the week of choma 50.
Fig. 4 shows water pump mouth ring sealing device embodiment's three of the present invention 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 make the return flow path of the backflow gap 60 between the back flash 51 of the water intake outer rim 21 of impeller 20 and choma 50 be extended, reduced the leakage rate of pumping chamber 40 inner high voltage fluids, and the high-pressure liquid that leaks 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, cross section is that the protuberance 52 of 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 back flash 51 of the water intake outer rim 21 of impeller 20 and choma 50 obtain extending; therefore, backflow gap 60 is designed to other shapes and also belongs to protection category of the present invention.
Water pump in the embodiment of the present invention is centrifugal pump, and preferably, the centrifugal pump in the embodiment of the present invention 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 to a further aspect in the invention, 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 that causes.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, the fluid that leaks with the script that impeller 20 and pump case 10 gaps are caused is 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 the outer radial internal diameter direction.
With reference to Fig. 6, preferably, for the return flow path of the backflow gap 60 between the back flash 51 of the water intake outer rim 21 that makes impeller 20 and choma 50 is extended, to have reduced the leakage rate of pumping chamber 40 inner high voltage fluids, in back flash 51 inside, also be 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 back flash 51 of the water intake outer rim 21 of impeller 20 and 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 the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (11)
1. water pump mouth ring sealing device, comprise pump case (10) and be located at the impeller (20) in described pump case (10), the suction chamber (30) that is provided with in described pump case (10) for water inlet reaches the pumping chamber (40) for 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 also is 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 the outer radial internal diameter direction.
6. the described water pump mouth ring sealing device of according to claim 1 to 5 any one, is characterized in that,
Described water pump is centrifugal pump.
7. 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 also is 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. the described choma of according to claim 7 to 10 any one, is characterized in that,
The opposite side of described choma (50) is provided with arc-shaped transition limit (53) from the outer radial internal diameter direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013103558725A CN103398020A (en) | 2013-08-15 | 2013-08-15 | Water pump wear-ring sealing device and wear-ring thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103558725A CN103398020A (en) | 2013-08-15 | 2013-08-15 | Water pump wear-ring sealing device and wear-ring thereof |
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| CN103398020A true CN103398020A (en) | 2013-11-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105715556A (en) * | 2016-04-11 | 2016-06-29 | 华纳圣龙（宁波）有限公司 | Water pump assembly |
| CN105756988A (en) * | 2014-12-20 | 2016-07-13 | 孙学东 | Efficient centrifugal pump with energy positive-feedback groove structure |
| CN106402013A (en) * | 2015-03-27 | 2017-02-15 | 株式会社久保田 | Pump and assembly method of the same |
| CN107100885A (en) * | 2017-05-19 | 2017-08-29 | 利欧集团浙江泵业有限公司 | A kind of self-adapting seal part |
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| GB242230A (en) * | 1925-06-30 | 1926-05-06 | John James Schmidt | Improvements in centrifugal pumps |
| JPS6098196A (en) * | 1983-11-02 | 1985-06-01 | Hitachi Ltd | Labyrinth seal device for centrifugal type impeller |
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| CN102345629A (en) * | 2010-08-03 | 2012-02-08 | 上海凯泉泵业（集团）有限公司 | Sealing ring structure for high-flow high-lift double suction pump |
| CN203404122U (en) * | 2013-08-15 | 2014-01-22 | 长沙山水节能研究院有限公司 | Impeller ring sealing device of water pump and impeller ring used for impeller ring sealing device |
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Patent Citations (7)
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| GB242230A (en) * | 1925-06-30 | 1926-05-06 | John James Schmidt | Improvements in centrifugal pumps |
| JPS6098196A (en) * | 1983-11-02 | 1985-06-01 | Hitachi Ltd | Labyrinth seal device for centrifugal type impeller |
| CN200989322Y (en) * | 2006-11-08 | 2007-12-12 | 浙江工业大学 | Double-sealing face vane type pump |
| CN200999749Y (en) * | 2007-01-12 | 2008-01-02 | 上海连成（集团）有限公司 | Water pump blade wheel sealing device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105756988A (en) * | 2014-12-20 | 2016-07-13 | 孙学东 | Efficient centrifugal pump with energy positive-feedback groove structure |
| CN106402013A (en) * | 2015-03-27 | 2017-02-15 | 株式会社久保田 | Pump and assembly method of the same |
| CN105715556A (en) * | 2016-04-11 | 2016-06-29 | 华纳圣龙（宁波）有限公司 | Water pump assembly |
| CN107100885A (en) * | 2017-05-19 | 2017-08-29 | 利欧集团浙江泵业有限公司 | A kind of self-adapting seal part |
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