CN203892243U - Impeller for coal water slurry pump - Google Patents
Impeller for coal water slurry pump Download PDFInfo
- Publication number
- CN203892243U CN203892243U CN201420162122.6U CN201420162122U CN203892243U CN 203892243 U CN203892243 U CN 203892243U CN 201420162122 U CN201420162122 U CN 201420162122U CN 203892243 U CN203892243 U CN 203892243U
- Authority
- CN
- China
- Prior art keywords
- impeller
- slurry pump
- water
- coal slurry
- blades
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title abstract description 20
- 239000003245 coal Substances 0.000 title abstract description 10
- 239000002002 slurry Substances 0.000 title abstract description 8
- 239000003250 coal slurry Substances 0.000 claims description 33
- 229920003266 Leaf® Polymers 0.000 claims description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 238000005299 abrasion Methods 0.000 abstract description 5
- 238000004134 energy conservation Methods 0.000 abstract description 3
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000009991 scouring Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 238000002309 gasification Methods 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 238000003889 chemical engineering Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides an impeller for a coal water slurry pump. The impeller for the coal water slurry pump comprises a front cover plate, main blades and a rear cover plate, wherein an impeller inlet is formed in the center of the front cover plate; the main blades are arranged between the front cover plate and the rear cover plate; the main blades, the front cover plate and the rear cover plate are integrated; the main blades comprise a plurality of long blades and a plurality of short blades, which are alternatively arrayed at intervals, so that an impeller runner is formed; on one side, close to the impeller inlet, of the impeller runner, the long blades are longer than the short blades. The impeller for the coal water slurry pump has the advantages that the sucking property of the impeller is improved, the hydraulic loss of the impeller inlet is reduced, and coal water slurry is prevented from being accumulated at the impeller inlet; the influence of flow separation and backflow phenomena at an outlet on the impeller performance is reduced or prevented, and the scouring abrasion of the impeller outlet is reduced; the disc loss is reduced, the efficiency is improved, and energy conservation is realized. Under the same impeller outer diameter condition, the rotary speed of the pump is reduced, and the abrasion of the impeller and other parts of the pump is reduced.
Description
Technical field
The utility model relates to centrifugal pump technical field, relates in particular to a kind of impeller for water-coal slurry pump.
Background technique
In prior art, in Coal Chemical Engineering Project gasification workshop section, overwhelming majority producer adopts coal water slurry process, adopt coal water slurry gasification technique, in coal water slurry gasification technological process, selecting of low-pressure water coal slurry pump, increasing producer selects centrifugal water coal slurry pump, facts have proved that it is the ideal product that substitutes diaphragm type and screw type low-pressure water coal slurry pump.
Because being subject to the restriction of the factors such as coal pulverizer specification, the flow of low-pressure water coal slurry pump is little, and lift is high, and the specific speed of pump is less.In addition the concentration of water coal slurry is higher, and wearing and tearing, erosion are the key factors that centrifugal water coal slurry pump is considered.Reduce wear and will reduce the rotating speed of pump with erosion.Reduce rotating speed and will reach same lift, will increase impeller outer diameter.The disc friction losses of centrifugal pump is a key factor that affects its performance in addition, especially the pump of the such low-specific-speed of centrifugal water coal slurry pump, affect larger, because disc friction losses is directly proportional to 5 powers of impeller outer diameter, so, in order to improve the efficiency of centrifugal pump, one of the most direct method is exactly to reduce impeller diameter.But under the constant condition of rotating speed, in order to reach the lift of regulation, after impeller outer diameter reduces, need to select larger blade exit laying angle and enough numbers of blade.So just produce two problems: the one, because blade exit laying angle is larger, the diffusion of impeller overcurrent runner is serious, will cause the decline of pump performance; The 2nd, the number of blade is more will cause inlet seriously to squeeze, and has increased the friction gross area, thereby causes pump performance to decline.
Model utility content
Technical problem to be solved in the utility model is to provide a kind of impeller for water-coal slurry pump, it can reduce impeller inlet hydraulic loss, prevent that water coal slurry from depositing at impeller inlet, reduce the abrasion of washing away of impeller outlet, raise the efficiency, realize energy-conservationly, reduce the wearing and tearing of other parts of impeller and pump.
In order to address the above problem, the utility model provides a kind of impeller for water-coal slurry pump, comprise front shroud, primary blades and back shroud, the center of described front shroud is impeller inlet, described primary blades is arranged between front shroud and back shroud, and described primary blades and described front shroud and described back shroud are integrated, described primary blades comprises multiple linear leafs and multiple short blade, described linear leaf and described short blade interval alternative arrangement, to form impeller channel, a side at described impeller channel near impeller inlet, described linear leaf is longer than described short blade.
Further, described linear leaf and short blade are cylinder blade or twisted blade.
Further, described short blade length is 0.5 ~ 0.6 times of linear leaf length.
Further, described short blade is set to biasing, described in be biased to distance blade working surface be 0.55 ~ 0.65 pitch.
Further, described primary blades number is even number, and linear leaf and short blade are altogether 6 ~ 10.
Further, described front shroud and back shroud are disc structure.
Further, on described front shroud, be provided with front back blades, leak to impeller inlet with the medium that stops impeller inlet.
Further, on described back shroud, be provided with rear back blades, leak to the Seal cage being connected with described impeller with the medium that stops impeller inlet.
Further, the wheel hub threaded connection place being connected with outside pump shaft of described impeller is embedded with high strength steel part.
The utility model has the advantage of, the primary blades structure that impeller of the present utility model adopts linear leaf and short blade interval to be arranged alternately, impeller inlet place lobe numbers reduces, can increase impeller inlet area, improve the suction performance of impeller, reduce impeller inlet hydraulic loss, prevent that water coal slurry from depositing at impeller inlet.The Exit-edge primary blades number of impeller increases, and can reduce or prevent from exporting the separation of flow and the impact of backflow phenomenon on impeller performance on the one hand, reduces impeller hydraulic loss, reduces the abrasion of washing away of impeller outlet; The lift of impeller increases on the other hand, and impeller outer diameter reduces, and disc friction losses reduces, and raises the efficiency, and realizes energy-conservation.Under same impeller outer diameter condition, the rotating speed of pump reduces, and has reduced the wearing and tearing of other parts of impeller and pump.
Brief description of the drawings
Figure 1 shows that the structural representation of the utility model for the impeller of water-coal slurry pump,
Figure 2 shows that the sectional view of the utility model for the impeller of water-coal slurry pump.
Reference character:
1, front shroud; 2, back shroud;
3, impeller inlet; 4, impeller outlet;
5, linear leaf; 6, short blade;
7, the working surface of linear leaf; 8, front back blades;
9, rear back blades; 10, the wheel hub screw thread of impeller;
11, high strength steel part.
Embodiment
The embodiment of the impeller for water-coal slurry pump the utility model being provided below in conjunction with accompanying drawing elaborates.
Figure 1 shows that the structural representation of the utility model for the impeller of water-coal slurry pump, Figure 2 shows that the sectional view of the utility model for the impeller of water-coal slurry pump, for clearer demonstration the utility model is for the structure of the impeller of water-coal slurry pump, in Fig. 1, remove a part of front shroud 1.
Referring to Fig. 1 and Fig. 2, the utility model comprises front shroud 1, primary blades and back shroud 2 for the impeller of water-coal slurry pump.
The center of described front shroud 1 is impeller inlet 3, and water coal slurry enters described impeller from described impeller inlet 3.The edge of described front shroud 1 and back shroud 2 is impeller outlet 4, and water coal slurry is discharged from described impeller outlet 4.In this embodiment, described front shroud 1 and back shroud 2 are disc structure.
Described primary blades is arranged between front shroud 1 and back shroud 2, and described primary blades and described front shroud 1 and described back shroud 2 be integrated, and three can one cast molding.Described primary blades comprises multiple linear leafs 5 and multiple short blade 6, described linear leaf 5 and described short blade 6 interval alternative arrangements, and to form impeller channel, the side at described impeller channel near impeller inlet 3, described linear leaf 5 is longer than described short blade 6.
The utility model adopts linear leaf 5 and short blade 6 interval alternative arrangements to form composite blading for the primary blades of the impeller of water-coal slurry pump, make to reduce in impeller inlet 3 place's lobe numbers, can increase the area of impeller inlet 3, improve the suction performance of impeller, reduce the hydraulic loss at impeller inlet 3 places, prevent that water coal slurry is in impeller inlet 3 places alluvial.Meanwhile, impeller outlet 4 place's primary blades numbers increase, and can reduce or prevent on the one hand the separation of flow and the impact of backflow phenomenon on impeller performance at impeller outlet 4 places, reduce impeller hydraulic loss, reduce the abrasion of washing away at impeller outlet 4 places; Make on the other hand the lift of impeller increase, under the prerequisite that is not less than minimum lift, can suitably reduce impeller outer diameter, impeller outer diameter reduces to make the disc friction losses at front shroud 1 and back shroud 2 places to reduce, and raises the efficiency, and realizes energy-conservation.Under same impeller outer diameter condition, the rotating speed of pump reduces, and has reduced the wearing and tearing of other parts of impeller and pump.
Further, in this embodiment, described linear leaf 5 and short blade 6 be shaped as cylinder blade or twisted blade.Further, described short blade 6 length are 0.5 ~ 0.6 times of linear leaf 5 length.Described short blade 6 is set to biasing, and the working surface that is biased to distance blade 57 of described short blade is 0.55 ~ 0.65 pitch, and in the utility model, described pitch refers to two circumferencial direction distances between linear leaf.Described primary blades number is even number, and preferably, described linear leaf 5 is altogether 6 ~ 10 with short blade 6.
Further, on described front shroud 1, be provided with front back blades 8, on described back shroud 2, be provided with rear back blades 9, described front back blades 8 and rear back blades 9 can stop the Seal cage that the medium of impeller inlet 3 is connected to impeller inlet 3 and with described impeller (not indicating in accompanying drawing) to leak, and reduce the wearing and tearing at impeller port ring place, simultaneously can balancing axial thrust, described impeller port ring is term well known to those skilled in the art, be for example seal ring, wear ring, is not repeated herein.
Further, the joint of the wheel hub screw thread 10 being connected with outside pump shaft (not indicating in accompanying drawing) of described impeller is embedded with high strength steel part 11.Its advantage is, in the time that impeller cast, pre-buried high strength steel part 11 can play chill effect on the one hand, the casting defect of the joint of minimizing wheel hub screw thread 10; Be convenient on the other hand the processing of connecting thread.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, do not departing under the prerequisite of the utility model structure; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (9)
1. the impeller for water-coal slurry pump, comprise front shroud, primary blades and back shroud, the center of described front shroud is impeller inlet, described primary blades is arranged between front shroud and back shroud, and described primary blades and described front shroud and described back shroud are integrated, it is characterized in that, described primary blades comprises multiple linear leafs and multiple short blade, described linear leaf and described short blade interval alternative arrangement, to form impeller channel, a side at described impeller channel near impeller inlet, described linear leaf is longer than described short blade, described short blade length is 0.5 ~ 0.6 times of linear leaf length.
2. the impeller for water-coal slurry pump according to claim 1, is characterized in that, described linear leaf and short blade are cylinder blade or twisted blade.
3. the impeller for water-coal slurry pump according to claim 1, is characterized in that, described short blade is set to biasing, and described short blade offset is that the working surface of distance blade is 0.55 ~ 0.65 pitch.
4. the impeller for water-coal slurry pump according to claim 1, is characterized in that, described primary blades number is even number.
5. the impeller for water-coal slurry pump according to claim 4, is characterized in that, described linear leaf and short blade are altogether 6 ~ 10.
6. the impeller for water-coal slurry pump according to claim 1, is characterized in that, described front shroud and back shroud are disc structure.
7. the impeller for water-coal slurry pump according to claim 1, is characterized in that, is provided with front back blades on described front shroud, leaks to impeller inlet with the medium that stops impeller inlet.
8. the impeller for water-coal slurry pump according to claim 1, is characterized in that, is provided with rear back blades on described back shroud, leaks to the Seal cage being connected with described impeller with the medium that stops impeller inlet.
9. the impeller for water-coal slurry pump according to claim 1, is characterized in that, the wheel hub threaded connection place being connected with outside pump shaft of described impeller is embedded with high strength steel part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420162122.6U CN203892243U (en) | 2014-04-04 | 2014-04-04 | Impeller for coal water slurry pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420162122.6U CN203892243U (en) | 2014-04-04 | 2014-04-04 | Impeller for coal water slurry pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203892243U true CN203892243U (en) | 2014-10-22 |
Family
ID=51718654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420162122.6U Expired - Lifetime CN203892243U (en) | 2014-04-04 | 2014-04-04 | Impeller for coal water slurry pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203892243U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953578A (en) * | 2014-04-04 | 2014-07-30 | 上海第一水泵厂有限公司 | Impeller for coal water slurry pump |
| EP3032723A3 (en) * | 2014-12-11 | 2016-07-13 | Johnson Electric S.A. | Pump and cleaning apparatus |
| CN106337833A (en) * | 2015-07-06 | 2017-01-18 | 杭州三花研究院有限公司 | Impeller, centrifugal pump and electric drive pump |
| CN106555775A (en) * | 2015-09-30 | 2017-04-05 | 杭州三花研究院有限公司 | Impeller, rotor assembly, centrifugal pump and electric drive pump |
| CN108999810A (en) * | 2018-06-27 | 2018-12-14 | 浙江科力车辆控制系统有限公司 | A kind of high-lift pump impeller for electric vehicle |
| CN109985549A (en) * | 2019-04-13 | 2019-07-09 | 山东科瑞机械制造有限公司 | A kind of centrifugal mixing sand tank |
| CN110185654A (en) * | 2019-05-29 | 2019-08-30 | 江苏大学 | A kind of centrifugal pump impeller cylinder entrance edge of blade curved surface process |
| WO2019232878A1 (en) * | 2018-06-06 | 2019-12-12 | 江苏大学 | Semi-open centrifugal pump impeller and design optimization method therefor |
-
2014
- 2014-04-04 CN CN201420162122.6U patent/CN203892243U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953578A (en) * | 2014-04-04 | 2014-07-30 | 上海第一水泵厂有限公司 | Impeller for coal water slurry pump |
| EP3032723A3 (en) * | 2014-12-11 | 2016-07-13 | Johnson Electric S.A. | Pump and cleaning apparatus |
| CN106337833A (en) * | 2015-07-06 | 2017-01-18 | 杭州三花研究院有限公司 | Impeller, centrifugal pump and electric drive pump |
| CN106555775A (en) * | 2015-09-30 | 2017-04-05 | 杭州三花研究院有限公司 | Impeller, rotor assembly, centrifugal pump and electric drive pump |
| CN106555775B (en) * | 2015-09-30 | 2020-06-23 | 浙江三花汽车零部件有限公司 | Impeller, rotor assembly, centrifugal pump and electric drive pump |
| WO2019232878A1 (en) * | 2018-06-06 | 2019-12-12 | 江苏大学 | Semi-open centrifugal pump impeller and design optimization method therefor |
| US11525454B2 (en) | 2018-06-06 | 2022-12-13 | Jiangsu University | Semi-open centrifugal pump impeller and its optimization design |
| CN108999810A (en) * | 2018-06-27 | 2018-12-14 | 浙江科力车辆控制系统有限公司 | A kind of high-lift pump impeller for electric vehicle |
| CN109985549A (en) * | 2019-04-13 | 2019-07-09 | 山东科瑞机械制造有限公司 | A kind of centrifugal mixing sand tank |
| CN110185654A (en) * | 2019-05-29 | 2019-08-30 | 江苏大学 | A kind of centrifugal pump impeller cylinder entrance edge of blade curved surface process |
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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: 20141022 |
|
| CX01 | Expiry of patent term |