CN101691872A - Impeller modified structure of chemical process pump - Google Patents
Impeller modified structure of chemical process pump Download PDFInfo
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- CN101691872A CN101691872A CN200910176736A CN200910176736A CN101691872A CN 101691872 A CN101691872 A CN 101691872A CN 200910176736 A CN200910176736 A CN 200910176736A CN 200910176736 A CN200910176736 A CN 200910176736A CN 101691872 A CN101691872 A CN 101691872A
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- pump
- impeller
- blade
- cover plate
- cover
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- 238000001311 chemical methods and process Methods 0.000 title abstract 4
- 238000000034 method Methods 0.000 claims description 26
- 239000000126 substance Substances 0.000 claims description 22
- 239000007788 liquid Substances 0.000 claims description 20
- 210000003205 muscle Anatomy 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 6
- 206010000234 Abortion spontaneous Diseases 0.000 claims description 3
- 208000015994 miscarriage Diseases 0.000 claims description 3
- 208000000995 spontaneous abortion Diseases 0.000 claims description 3
- 239000012530 fluid Substances 0.000 abstract description 2
- 238000012423 maintenance Methods 0.000 abstract 1
- 230000000717 retained effect Effects 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
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Abstract
The invention relates to an impeller structure of a pump, in particular to an impeller structure of a chemical process pump, which belongs to the field of mechanical fluid. The impeller structure comprises blades, cover plates and a hub, wherein molded lines of the blades are drawn by using equal changeable angle logarithmic spiral lines, and the thickness of the blades gradually increases from an inlet end to an outlet end along the molded lines; the outline on the left side of the cover plates is in smooth and backward inclined extension, and the thickness of the cover plates gradually increases from the inlet end to the outlet end along the smooth and backward inclined extension; an outlet of the blades is uniformly distributed with hollow cover plates, and a part of the cover plates is retained; each cover plate is uniformly distributed with balance holes for balancing a part of axial force; and the hub is a ring body and is provided with a key slot in the junction with an axis. The components are connected in the following relation: the blades, the cover plates and the hub are cast into a whole body to form an impeller; the blades are uniformly distributed on the cover plates; and the hub is arranged on the back side of the cover plates. The impeller structure is to improve the efficiency of the chemical process pump and prevent fins from abrading a pump cover near the impeller so as to ensure the use efficiency and reduce the running maintenance cost of the chemical process pump.
Description
Technical field
The present invention relates to the blade wheel structure of pump, particularly a kind of blade wheel structure of chemical flow-process pump belongs to the mechanical fluid field.
Background technique
In chemical field, chemical flow-process pump is mainly used in carries the various media that have corrosivity and contain low particle, under some special operation conditions, and the medium conveying easily-crystallized, that suspended matter and easy precipitate particles are arranged.In pump-unit, adopt double shrouded wheel than corresponding unshrouded impeller efficient height, but easily stop up during media such as conveying easily-crystallized and suspended matter precipitate particles, therefore, unshrouded impeller is widely used under this operating mode.Impeller is that pump most important work element and pumping chamber coupling obtain flow, lift, utilization efficiency efficiently; In prior art, impeller is a half-opened impeller, adopt the design method of double shrouded wheel, be designed to guarantee impeller blade waterpower, half-opened impeller is behind cancellation front shroud on the basis of double shrouded wheel, thereby the lift that causes descends, and wants to improve lift, and impeller outer diameter increases to 1.1-1.25 doubly according to the gap situation.The blade wheel structure of chemical flow-process pump as shown in Figure 1 and Figure 2 in the prior art, impeller is made up of blade 1, cover plate 2, wheel hub 3 cast inblocks, blade 1 is distributed on the cover plate 2, the axial force that is produced when design has five muscle sheets 4, muscle sheet 4 to be used for the ballast pump operation on the cover plate 2.Gap between the half-opened impeller structure of this employing double shrouded wheel design method design pair and the pump housing is strict, in case gap control is excessive, liquid flows in the pump chamber, the pump housing is flowed out in effect by blade, small part liquid then by the gap between blade and pump housing pump wall, is back to impeller eye, from newly entering blade passage, the loss that liquid refluxes and causes in pump chamber reduces pump efficiency.Simultaneously regional introductory note plays the efficient that secondary flow loss that the part turbulent flow brings and cover plate 2 disc frictions have reduced pump between blade 1 turning urgency and the blade 1.
Summary of the invention
The objective of the invention is to improve the efficient of chemical flow-process pump and avoid the pump cover of muscle pad wear, thereby design open type eddy current blade wheel structure required in a kind of chemical flow-process pump, guarantee utilization efficiency near impeller.
The outstanding improvement characteristics of the impeller modified structure of chemical flow-process pump of the present invention are: owing to the gap of the impeller in the prior art and the pump housing is strict, excesssive gap then lowers efficiency.In the present invention, adopt the full-open type impeller, the waterpower design of impeller blade adopts assorted stock pump design theory to design, in the middle of the impeller is low pressure area, liquid falls into this zone and flows out under the drive of eddy flow, reduces the obstruction to runner, and the size in the gap between blade and pump housing pump wall can not make liquid form backflow in pump chamber, the loss that avoiding like this refluxes causes has improved the efficient of pump; The even hollow out of cover plate outward edge quilt at the blade exit place, reserve part cover plate, thereby the friction area of minimizing cover plate, the loss in efficiency that reduces to rub and cause; By the use of above dual mode, greatly degree has guaranteed the efficient of pump; Muscle sheet in the cancellation prior art, thus the pump cover of the muscle sheet vortex infringement that miscarriage is given birth to liquid avoided near impeller; Turn suddenly for overcoming the semi-open type blade, employing waits the angle log spiral to draw molded lines when the blade of design unshrouded impeller, thus the cornerite of control blade, the anxious phenomenon of stopping to turn, the efficient of raising pump.
The technological scheme that is adopted for achieving the above object: the impeller modified structure of chemical flow-process pump comprises blade, cover plate, wheel hub; Peripheral unit comprises pump cover, mechanical seal, pump shaft.Wherein: angle log spirals such as blade employing are drawn the cornerite of molded lines control blade, thicken gradually to outlet end thickness along molded lines from entrance point; Cover plate left side external frame is smooth back curved and glides, and the thickness of cover plate increases from the outlet end to the entrance point gradually; In the ingress of blade, cover plate left side formed radian of external frame and impeller nut outer surface tangential, the hydraulic loss when reducing liquid and entering blade; Be evenly equipped with the hollow out cover plate at the blade exit place, the reserve part cover plate, on the cover board uniform equalizing orifice is used for the balance portion axial force; Wheel hub is a ring bodies, is furnished with keyway with the pump shaft joint.
Their annexation is: blade, cover plate, wheel hub are cast into one and form impeller; Blade is on the cover board uniform; Wheel hub is at the cover plate rear side; The annexation of they and peripheral unit is: the impeller modified structure of chemical flow-process pump is socketed in the end of pump shaft by keyway, then is pressed in pump shaft head place with impeller nut, and pump cover is connected with mechanical seal on the back socket pump shaft, and pump cover is near cover plate.
Working procedure of the present invention is: impeller rotates by motor and drives energy high speed rotating in pump chamber that the pump shaft rotation passes over, after liquid enters pump chamber, along with the formed camber line of impeller cover left side external frame, slip in the blade, because the cover plate of impeller is by the part hollow out, liquid contacts few between blade with impeller surface, frictional loss is few; The blade waterpower design of impeller adopts assorted stock pump design theory to design, in the middle of the impeller is low pressure area, liquid falls into this zone and flows out under the drive of eddy flow, minimizing is to the obstruction of runner, and the size in the gap between blade and pump housing pump wall can not make liquid form backflow in pump chamber and directly flow out the pump housing.
Beneficial effect:
1, the impeller after improving not can owing to and the pump housing between the efficient of gap affects pump;
2, the even hollow out of the cover plate outward edge at blade exit place quilt, reserve part cover plate, thereby the friction area of minimizing cover plate, the loss in efficiency that reduces to rub and cause;
3, the muscle sheet in the cancellation prior art, thus the pump cover of the muscle sheet vortex infringement that miscarriage is given birth to liquid avoided near impeller;
4. impeller cover thickness is the circular arc variation, and tangent with impeller nut, has well avoided hydraulic loss.
Description of drawings
Fig. 1 is the blade wheel structure sectional view of existing chemical flow-process pump;
Fig. 2 is the blade wheel structure left view of existing chemical flow-process pump;
Fig. 3 is the impeller modified structure sectional view of chemical flow-process pump of the present invention;
Fig. 4 is the impeller modified structure left view of chemical flow-process pump of the present invention;
Fig. 5 is the impeller modified structure mounting structure figure of chemical flow-process pump of the present invention;
Wherein: 1-blade, 2-cover plate, 3-wheel hub, 4-muscle sheet, 5-keyway, 6-pump cover, 7-mechanical seal, 8-pump shaft, 9-equalizing orifice, 10-impeller nut.
Concrete mode of execution
The present invention is described further to engage drawings and Examples below;
As shown in Figure 3, Figure 4, the impeller modified structure of a kind of chemical flow-process pump of the present invention comprises blade 1, cover plate 2, wheel hub 3; Peripheral unit comprises pump cover 6, mechanical seal 7, pump shaft 8, impeller nut 10.Wherein: blade 1 employing waits the angle log spiral to draw molded lines, and blade is thickeied along molded lines gradually from entrance point to outlet end thickness, and entrance point is 6mm, and outlet end is 9mm; Sentencing the molded lines end points at blade exit is that the point of contact is the uniform hollow out cover plate of circular arc of 20mm as radius, the reserve part cover plate, and on the cover board uniform central diameter is the equalizing orifice 9 of six Φ 6mm of Φ 50mm; Wheel hub is a ring bodies, is furnished with the keyway 5 of wide 6mm with the pump shaft joint.
Their annexation is: blade 1, cover plate 2, wheel hub 3 are cast into one and form impeller; Blade 1 is distributed on the cover plate 2; Wheel hub 3 is ring bodies at cover plate 2 rear sides, is evenly equipped with six equalizing orifices 9 on the cover plate 2.As shown in Figure 5, the annexation of they and peripheral unit is: impeller is socketed in the end of pump shaft 8 by keyway 5, and pump cover 6 is connected with mechanical seal 7 on the back socket pump shaft 8, and pump cover 6 is near cover plates 2.
Working procedure of the present invention is: impeller rotates by motor and drives energy high speed rotating in pump chamber that the pump shaft rotation passes over, after liquid enters pump chamber, along with the formed camber line of impeller cover 2 left side external frames, slip in the blade 1, because the cover plate 2 of impeller is by the part hollow out, liquid contacts few with impeller surface in 1 in blade, frictional loss is few; The blade 1 waterpower design of impeller adopts assorted stock pump design theory to design, in the middle of the impeller is low pressure area, liquid falls into this zone and flows out under the drive of eddy flow, minimizing is to the obstruction of runner, and the size in the gap between blade 1 and pump housing pump wall can not make liquid form backflow in pump chamber and directly flow out the pump housing.
Claims (5)
1. the impeller modified structure of chemical flow-process pump, it comprises blade (1), cover plate (2), wheel hub (3); Peripheral unit comprises pump cover (6), mechanical seal (7) and pump shaft (8); It is characterized in that: in order to stop the cornerite of blade (1) turning anxious control blade (1); Blade (1) is thickeied to outlet end thickness gradually from entrance point; Cover plate (2) left side external frame is smooth back curved and glides, and the thickness of cover plate (2) increases from the outlet end to the entrance point gradually; Ingress in blade (1), cover plate (2) left side formed radian of external frame and impeller nut (10) outer surface tangential, the hydraulic loss when being used to reduce liquid and entering blade (1); Be evenly equipped with the cover plate (2) of hollow out in blade (1) outlet port, reserve part cover plate (2); Go up uniform equalizing orifice (9) at cover plate (2), be used for the balance portion axial force; Wheel hub (3) is a ring bodies, is furnished with keyway (5) with pump shaft (8) joint;
Their annexation is: blade (1), cover plate (2), wheel hub (3) are cast into one and form impeller; Blade (1) is distributed on the cover plate (2); Wheel hub (3) is at cover plate (2) rear side; The annexation of they and peripheral unit is: the impeller modified structure of chemical flow-process pump is socketed in the end of pump shaft (8) by keyway (5), then be pressed in pump shaft (2) head place with impeller nut (10), pump cover (6) is connected with mechanical seal (7) on the back socket pump shaft (2), and pump cover (6) is near cover plate (2).
2. the impeller modified structure of chemical flow-process pump according to claim 1 is characterized in that: the cornerite of angle log spiral drafting molded lines control blade such as blade (1) employing (1).
3. the impeller modified structure of chemical flow-process pump according to claim 1, it is characterized in that: the even hollow out of cover plate (2) outward edge quilt in blade (1) outlet port, reserve part cover plate (2), thus the friction area of minimizing cover plate (2) is used to the loss in efficiency that reduces to rub and cause.
4. the impeller modified structure of chemical flow-process pump according to claim 1, it is characterized in that: go up uniform equalizing orifice (9) with cover plate (2) and come balancing axial thrust, muscle sheet (4) in the cancellation prior art is avoided the pump cover (6) of muscle sheet (4) the vortex infringement that miscarriage is given birth to liquid near impeller.
5. the impeller modified structure of chemical flow-process pump according to claim 1, it is characterized in that: the waterpower design of impeller blade (1) adopts assorted stock pump design theory to design, in the middle of the impeller is low pressure area, liquid falls into this zone and flows out under the drive of eddy flow, minimizing is to the obstruction of runner, can not make liquid in pump chamber, form backflow, thus need not the strict gap of controlling between blade (1) and pump housing pump wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910176736A CN101691872A (en) | 2009-09-18 | 2009-09-18 | Impeller modified structure of chemical process pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910176736A CN101691872A (en) | 2009-09-18 | 2009-09-18 | Impeller modified structure of chemical process pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101691872A true CN101691872A (en) | 2010-04-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910176736A Pending CN101691872A (en) | 2009-09-18 | 2009-09-18 | Impeller modified structure of chemical process pump |
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| CN (1) | CN101691872A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588304A (en) * | 2012-02-10 | 2012-07-18 | 宁波大叶园林设备有限公司 | Centrifugal pump with swirl sprayer engine directly connected with high-speed function vane wheel and even-spinning labyrinth |
| CN102701473A (en) * | 2012-07-05 | 2012-10-03 | 南昌航空大学 | Aerator impeller with log spiral curved surfaces |
| CN109185217A (en) * | 2018-11-28 | 2019-01-11 | 无锡艾比德泵业有限公司 | A kind of suction inlet is the water inlet segment structure of the centrifugal multistage pump multiple centrifugal pump of fish mouth type |
| CN111997931A (en) * | 2020-09-15 | 2020-11-27 | 郑州联兴冶金设备有限公司 | Impeller and slurry pump |
| WO2023151223A1 (en) * | 2022-02-11 | 2023-08-17 | 江苏大学 | Multi-stage semi-open centrifugal pump capable of reducing wear |
-
2009
- 2009-09-18 CN CN200910176736A patent/CN101691872A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588304A (en) * | 2012-02-10 | 2012-07-18 | 宁波大叶园林设备有限公司 | Centrifugal pump with swirl sprayer engine directly connected with high-speed function vane wheel and even-spinning labyrinth |
| CN102588304B (en) * | 2012-02-10 | 2014-04-16 | 宁波大叶园林设备有限公司 | Centrifugal pump with swirl sprayer engine directly connected with high-speed function vane wheel and even-spinning labyrinth |
| CN102701473A (en) * | 2012-07-05 | 2012-10-03 | 南昌航空大学 | Aerator impeller with log spiral curved surfaces |
| CN102701473B (en) * | 2012-07-05 | 2014-07-09 | 南昌航空大学 | Aerator impeller with log spiral curved surfaces |
| CN109185217A (en) * | 2018-11-28 | 2019-01-11 | 无锡艾比德泵业有限公司 | A kind of suction inlet is the water inlet segment structure of the centrifugal multistage pump multiple centrifugal pump of fish mouth type |
| CN111997931A (en) * | 2020-09-15 | 2020-11-27 | 郑州联兴冶金设备有限公司 | Impeller and slurry pump |
| WO2023151223A1 (en) * | 2022-02-11 | 2023-08-17 | 江苏大学 | Multi-stage semi-open centrifugal pump capable of reducing wear |
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| PB01 | Publication | ||
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100407 |