CN2893235Y - Wear resisting centrifugal mortar pump - Google Patents
Wear resisting centrifugal mortar pump Download PDFInfo
- Publication number
- CN2893235Y CN2893235Y CN 200620072898 CN200620072898U CN2893235Y CN 2893235 Y CN2893235 Y CN 2893235Y CN 200620072898 CN200620072898 CN 200620072898 CN 200620072898 U CN200620072898 U CN 200620072898U CN 2893235 Y CN2893235 Y CN 2893235Y
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- Prior art keywords
- pump
- sealing
- impeller
- back blade
- concave
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- Expired - Lifetime
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Abstract
The utility model relates to an improved wear-resisting centrifugal slurry pump, characterized in that: the axial bulge of the reverse blade at the central part of the impeller shows the step shape, while the pump shell that is corresponding to the bulge is provided with a complementing concave pit. A concave and convex maze is formed between the reverse blade bulge and pump complementing concave pit so as to not only effectively block off the high-voltage liquid in the pump cavity directly flowing into the sealing reversely to maintain the lower pressure of the sealing part, but also to reduce the pressure of the sealing part under the function of the reverse blade in the concave and convex maze, to attain a decompressing effect of -0.02MPa under the same testing condition, and to further prolong the service life of the lip-type sealing and to increase the service life of sealing more than one time. The utility model also basically does not add the power consumption of the axis so that the utility model is very convenient for mounting and repairing.
Description
Technical field
Model utility is about the improvement to the wear-resisting centrifugal mortar pump, relates in particular to a kind ofly can effectively prolong the lip seal wear-resisting centrifugal mortar pump in working life.
Background technique
Centrifugal mortar pump often adopts back blade to add lip rubber ring (sealing of K shape) sealing configuration.In the use, back blade is subjected to particle aggressiveness in the fed sheet of a media, can cause with the pump case gap and become big, the forfeiture of back blade pressure-reducing function, cause pump discharge hydrodynamic pressure straight line to backflow, seal lip position hydrodynamic pressure is raise, add particle in the medium to pump shaft K shape sealing position, aggravate the seal lip wearing and tearing, shortened sealing life.When-the 0.02-0MPa, lip seal can be used the several months as mortar pump sealed department bit stream body pressure, be increased to+during 0.02MPa, shorten to working life about January, be increased to when+0.04MPa, shorten to working life about 2 weeks, be increased to+during 0.06MPa, shorten to working life about 1 week.This wearing and tearing are especially used under outlet pressure higher (for example pump work is design pressure curve high pressure points at the outlet pressure) situation at pump, and sealing wear is then even more serious.
Be to reduce sealed department bit stream body pressure, prolong seal lip working life, prior art has to adopt and strengthens back blade diameter way.Yet increase the back blade diameter, not only can cause air horsepower consumption to increase, need to increase air horsepower and consume about about 15%; And the increase of back blade diameter, make periphery roulette speed increase, the aggravation of pump chamber eddy current, especially pump case cut water place eddy current aggravation can be quickened the back blade wearing and tearing.In addition, also there is employing to set up a sub-propeller independently, sets up a labyrinth-like sub-propeller chamber in the pump case, shaft sealing is reduced pressure to reach at the impeller rear side.Yet the increase sub-propeller not only can cause air horsepower consumption to increase equally, increases air horsepower about about 10%; And the increase sub-propeller, pump case inner-cavity structure complexity, not only installation and maintenance difficulty, each parts clearance is difficult to control, and has increased the lining difficulty.
The claimant once taked to be provided with between impeller and rear pump cover and rotated concavo-convex labyrinth seal, as described in Chinese patent CN2644727.Yet owing to do not have back blade in the chamber, labyrinth, the pressure blocking effect can only be played in this concavo-convex labyrinth, does not have effect of easing stress substantially, and therefore still having is worth improved place.
To sum up, shurry pump shaft sealing pressure is higher, and back blade decompression less stable causes shaft sealing shortening in working life, is insoluble hard nut to crack in the industry always.
Summary of the invention
The purpose of model utility is to overcome the deficiency of above-mentioned prior art, provides a kind of and can effectively keep and reduce sealing site pressure, the wear-resisting centrifugal mortar pump of seal lip long service life.
The model utility purpose realizes, main improvement will be with the former straight back of back blade impeller (comprising back blade) to change the protrusion ledge structure into, and the pit that complementation is set at the corresponding impeller protrusion of pump case position, impeller back protrusion step and pump case corresponding part pit form concavo-convex labyrinth like this, can not only effectively stop the counter straight sealing position that flow to of pump chamber high-pressure liquid, keep sealing position low-pressure, and because back blade effect in the concavo-convex labyrinth, also have and reduce the effect of sealing site pressure, and then prolonged lip seal working life.Specifically, model utility wear-resisting centrifugal mortar pump comprises centrifugal pump shell and band back blade impeller, it is characterized in that said impeller at least the central part back blade axially protrude and be step-like, the corresponding bump of pump case has complementary pit.
The said band back blade of model utility impeller can be a half-opened impeller, also can be double shrouded wheel.Protrude at the impeller back, can be that only back blade protrudes, and also can be to comprise that impeller back matrix protrudes.
Said protrusion step, a kind of bump radius that is preferably is about about 1/2 of back blade radius.Protrusion height according to the impeller size, is preferably 5-20mm.
In addition, back blade can be Yuanping City's direct rays structure, also can be arcuate structure.
Model utility since with impeller at least back blade change central part into the protrusion ledge structure arranged, and be processed with complementary with it pit at corresponding pump case position, the concavo-convex labyrinth that both form, can not only effectively stop the counter straight sealing position that flow to of pump chamber high-pressure liquid, keep sealing position low-pressure, and because back blade effect in the concavo-convex labyrinth, also has the effect of the sealing of reduction site pressure, can obtain under the same terms after tested-the 0.02Mpa effect of easing stress, and then prolonged lip seal working life, can improve sealing working life more than one times.And do not increase air horsepower consumption substantially, installation and maintenance are also convenient, do not increase difficulty.
Below in conjunction with two preferred indefiniteness mode of executions, further specify model utility, accompanying drawing only is in order to describe preferred implementation, and should not be understood that the qualification to model utility.
Description of drawings
Fig. 1 is the concavo-convex labyrinth structure schematic representation of model utility.
Fig. 2 is first embodiment's half-opened impeller structural representation.
Fig. 3 is Fig. 2 left side TV structure schematic representation.
Fig. 4 is second embodiment's arc back vane structure schematic representation.
Fig. 5 is the 3rd embodiment's half-opened impeller structural representation.
Fig. 6 is Fig. 5 left side TV structure schematic representation.
Fig. 7 is the 4th embodiment's arc back impeller structural representation.
Fig. 8 is the 5th embodiment's double shrouded wheel structural representation.
Embodiment
Embodiment 1: referring to Fig. 1,2,3, model utility wear-resisting centrifugal mortar pump, the center, half-opened impeller 1 back (back blade side) of band back blade, outwards about 1/2 impeller radius of (axially) protrusion is arranged, protrusion height is 6mm step (a step type back impeller), pump case 3 corresponding convex positions have and protrude complementary pit 3.1, form the labyrinth of tortuous runner 4 between the two.Axially protrude at the impeller back, for impeller matrix 1.1 and back blade 2.2 all protrude.
Embodiment 2: referring to Fig. 4, as embodiment 1, wherein the back blade 2.4 of back blade 2.3 and protrusion is curved.
Embodiment 3: referring to Fig. 5,6, as embodiment 1, the impeller matrix does not protrude, and only back blade 2.2 protrudes, and protrusion height is 15mm.
Embodiment 4: referring to Fig. 7, as embodiment 3, wherein the back blade 2.4 of back blade 2.3 and protrusion is curved.
Embodiment 5: referring to Fig. 8, impeller is a double shrouded wheel 5, and the back has the impeller matrix 5.1 and the back blade 2.2 of axial protrusion respectively.
Claims (4)
1, wear-resisting centrifugal mortar pump comprises centrifugal pump shell and band back blade impeller, it is characterized in that said impeller at least the central part back blade axially protrude and be step-like, the corresponding bump of pump case has complementary pit.
2,, it is characterized in that said bump radius is about 1/2 of a back blade radius according to the described wear-resisting centrifugal mortar pump of claim 1.
3,, it is characterized in that said protrusion height is 5-20mm according to claim 1 or 2 described wear-resisting centrifugal mortar pumps.
4,, it is characterized in that said impeller is half-opened impeller and double shrouded wheel according to the described wear-resisting centrifugal mortar pump of claim 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620072898 CN2893235Y (en) | 2006-04-25 | 2006-04-25 | Wear resisting centrifugal mortar pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620072898 CN2893235Y (en) | 2006-04-25 | 2006-04-25 | Wear resisting centrifugal mortar pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2893235Y true CN2893235Y (en) | 2007-04-25 |
Family
ID=38061397
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620072898 Expired - Lifetime CN2893235Y (en) | 2006-04-25 | 2006-04-25 | Wear resisting centrifugal mortar pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2893235Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900123A (en) * | 2009-05-29 | 2010-12-01 | 日本电产三协株式会社 | Fluidic device and pump device |
| CN105257548A (en) * | 2015-10-16 | 2016-01-20 | 深圳市荣鹏建筑工程有限公司 | Pump |
| CN109083864A (en) * | 2018-07-27 | 2018-12-25 | 中国船舶重工集团公司第七〇九研究所 | A kind of radial-flow type rotating machinery impeller |
| CN109185222A (en) * | 2018-09-13 | 2019-01-11 | 宜兴市宙斯泵业有限公司 | A kind of centrifugal pump impeller |
| CN109268306A (en) * | 2018-11-09 | 2019-01-25 | 合肥工业大学 | A kind of combined type impeller rotor |
| CN112377456A (en) * | 2020-11-30 | 2021-02-19 | 江西亚太科技发展有限公司 | Sewage treatment system and sewage pump thereof |
| CN114857051A (en) * | 2022-05-23 | 2022-08-05 | 蔡义祥 | Novel ventilation equipment and fan |
-
2006
- 2006-04-25 CN CN 200620072898 patent/CN2893235Y/en not_active Expired - Lifetime
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101900123A (en) * | 2009-05-29 | 2010-12-01 | 日本电产三协株式会社 | Fluidic device and pump device |
| CN101900123B (en) * | 2009-05-29 | 2014-04-02 | 日本电产三协株式会社 | Fluidic device and pump device |
| CN105257548A (en) * | 2015-10-16 | 2016-01-20 | 深圳市荣鹏建筑工程有限公司 | Pump |
| CN109083864A (en) * | 2018-07-27 | 2018-12-25 | 中国船舶重工集团公司第七〇九研究所 | A kind of radial-flow type rotating machinery impeller |
| CN109185222A (en) * | 2018-09-13 | 2019-01-11 | 宜兴市宙斯泵业有限公司 | A kind of centrifugal pump impeller |
| CN109185222B (en) * | 2018-09-13 | 2024-05-10 | 宜兴市宙斯泵业有限公司 | Impeller of centrifugal pump |
| CN109268306A (en) * | 2018-11-09 | 2019-01-25 | 合肥工业大学 | A kind of combined type impeller rotor |
| CN112377456A (en) * | 2020-11-30 | 2021-02-19 | 江西亚太科技发展有限公司 | Sewage treatment system and sewage pump thereof |
| CN112377456B (en) * | 2020-11-30 | 2022-09-06 | 江西亚太科技发展有限公司 | Sewage treatment system and sewage pump thereof |
| CN114857051A (en) * | 2022-05-23 | 2022-08-05 | 蔡义祥 | Novel ventilation equipment and fan |
| CN114857051B (en) * | 2022-05-23 | 2024-05-07 | 王洪燕 | Novel ventilation equipment and fan |
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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 |
Granted publication date: 20070425 |
|
| EXPY | Termination of patent right or utility model |