CN203796618U - Horizontal self-balancing centrifugal pump with first-stage combination impeller - Google Patents
Horizontal self-balancing centrifugal pump with first-stage combination impeller Download PDFInfo
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- CN203796618U CN203796618U CN201420162602.2U CN201420162602U CN203796618U CN 203796618 U CN203796618 U CN 203796618U CN 201420162602 U CN201420162602 U CN 201420162602U CN 203796618 U CN203796618 U CN 203796618U
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- impeller
- centrifugal pump
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002131 composite material Substances 0.000 claims description 26
- 229920003266 Leaf® Polymers 0.000 claims description 23
- 230000008676 import Effects 0.000 claims description 5
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000005086 pumping Methods 0.000 abstract 2
- 238000012423 maintenance Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 210000004907 gland Anatomy 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model provides a horizontal self-balancing centrifugal pump with a first-stage combination impeller. The horizontal self-balancing centrifugal pump comprises a stator part and a rotor part. The stator part comprises a water inlet section, an intermediate section, a water outlet section and a secondary pumping section which are sequentially axially arranged along the horizontal self-balancing centrifugal pump with the first-stage combination impeller; the rotor part comprises a pump shaft, a first-stage impeller, a front impeller, a rear impeller and a last-stage impeller, wherein the impellers are fixed on the pump shaft. The first-stage impeller and the front impeller as well as the rear impeller and the last-stage impeller are symmetrically arranged so as to balance axial force. The first-stage impeller comprises a front cover plate, vanes and a rear cover plate, the vanes are arranged between the front cover plate and the rear cover plate, and the vanes are integrated with the front cover plate and the rear cover plate. The vanes include a plurality of long vanes and a plurality of short vanes, the long vanes and the short vanes are alternatively arranged at intervals so as to form impeller runners, and the long vanes are longer than the short vanes on one side of inlets of the impellers. The horizontal self-balancing centrifugal pump has the advantages that pumping performance of the centrifugal pump is improved, cavitation performance of the centrifugal pump is improved, and affection of backflow at the outlet is reduced or prevented.
Description
Technical field
The utility model relates to centrifugal pump technical field, relates in particular to a kind of horizontal self-balancing centrifugal pump with chopped-off head composite impeller.
Background technique
From the prior art, the multistage centrifugal pump on market mostly is chopped-off head single suction, the equidirectional arrangement of other impeller.Sometimes medium contains a small amount of solid particle, easily balanced controls is produced and is destroyed, cannot balancing axial thrust, and cause centrifugal pump to damage, impact is normally used.Also there is in recent years the self-balanced multiple-stage centrifugal pump that impeller is arranged symmetrically with, solved the problem of balancing axial thrust.
In prior art, some mines, chemical industry, power plant require more and more higher to the anti-cavitation performance of centrifugal pump.The method that the self-balanced multiple-stage centrifugal pump that impeller is arranged symmetrically with solves problem of cavitation is: increase impeller inlet diameter, change impeller material or adopt double-entry impeller etc.Adopt and increase the obviously efficiency of reduction centrifugal pump of impeller inlet diameter.And change impeller material, and adopt the material of anti-cavitation to manufacture impeller, can increase the manufacture cost of impeller, can not thoroughly solve problem of cavitation.Adopt double suction first stage impeller can carry high suction depth, but its structure is comparatively complicated, and maintenance is inconvenient, cost is higher.The pump generation problem of cavitation more using, its transformation adopts the scheme that increases impeller inlet diameter or adopt double-entry impeller, changes larger, not quite real.
Model utility content
Technical problem to be solved in the utility model is, a kind of horizontal self-balancing centrifugal pump with chopped-off head composite impeller is provided, and it can balancing axial thrust, there is high-cavitation-resistance energy, avoid the damage of cavitation phenomenons to centrifugal pump, improve the suction journey of centrifugal pump, and rational in infrastructure, simply compact.
In order to address the above problem, the utility model provides a kind of horizontal self-balancing centrifugal pump with chopped-off head composite impeller, comprise stator component and rotor part, comprise stator component and rotor part, stator component comprises that edge has the inlet segment axially setting gradually, stage casing, water exit end and the secondary suction casing of the horizontal self-balancing centrifugal pump of chopped-off head composite impeller, rotor part comprises pump shaft and is fixed on the first stage impeller on pump shaft, front impeller, rear impeller, impeller, first stage impeller and front impeller and rear impeller and impeller are symmetrical arranged, with balancing axial thrust; First stage impeller comprises front shroud, blade and back shroud, blade is arranged between front shroud and back shroud, and blade and front shroud and back shroud are integrated, blade comprises multiple linear leafs and multiple short blade, linear leaf and short blade interval alternative arrangement, to form impeller channel, in a side of the import of described impeller, linear leaf is longer than short blade.
Further, described linear leaf and short blade be shaped as cylindrical or twisted shape.
Further, described short blade length is 0.5 ~ 0.6 times of linear leaf length.
Further, 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.
Further, described lobe numbers is even number, and linear leaf and short blade are altogether 6 ~ 10.
Further, between described inlet segment, stage casing, water exit end and secondary suction casing, adopt the seal with elastometic washer of O shape.
The utility model has the advantage of, because its first stage impeller and front impeller and rear impeller and impeller are the back-to-back self-balance structures being arranged symmetrically with, have solved axial force balance mechanism and damaged the problem that pump normally moves that affect.First stage impeller adopts the blade structure that linear leaf and short blade interval are arranged alternately simultaneously, form the structure of chopped-off head composite impeller, can increase first stage impeller inlet-duct area, reduce inlet velocity, improve the suction performance of centrifugal pump, well avoided the cavitation phenomenons of centrifugal pump in the time that large-capacity point moves, make centrifugal pump there is high-cavitation-resistance energy, avoid the damage of cavitation phenomenons to centrifugal pump, effectively extended the working life of centrifugal pump.Some mines, chemical industry are solved, the problem of the device pump cavitation that power plant etc. have relatively high expectations to cavitation performance.Simultaneously the Exit-edge lobe numbers of chopped-off head composite impeller increases, and can reduce on the one hand or prevent from exporting the separation of flow and the impact of backflow phenomenon on impeller performance.The horizontal self-balancing centrifugal pump that the utlity model has chopped-off head composite impeller is rational in infrastructure, simply compact, and axial dimension is little, operate steadily, safe and reliable, and the installation, maintenance feature such as quick easy to detect.The pump generation problem of cavitation more using, because its outline overall and installing dimensions can be in full accord with former pump, and can improve anti-cavitation performance, is the ideal scheme that solves in-service pump generation problem of cavitation.
Brief description of the drawings
Figure 1 shows that the structural representation of the horizontal self-balancing centrifugal pump that the utlity model has chopped-off head composite impeller;
Figure 2 shows that the structural representation of the utility model first stage impeller;
Figure 3 shows that the sectional view of the utility model first stage impeller.
Reference character:
100, there is the horizontal self-balancing centrifugal pump of chopped-off head composite impeller;
101, inlet segment; 102, stage casing;
103, water exit end; 104, secondary suction casing;
105, first stage impeller; 106, front impeller;
107, rear impeller; 108, impeller;
109, turnbuckle assembly; 110, drive end bearing parts;
111, non-driven-end bearing parts; 112, sealed letter body;
201, front shroud; 202, back shroud;
203, impeller inlet; 204, impeller outlet;
205, linear leaf; 206, short blade;
207, the working surface of linear leaf.
Embodiment
The embodiment of the horizontal self-balancing centrifugal pump with chopped-off head composite impeller the utility model being provided below in conjunction with accompanying drawing elaborates.
Figure 1 shows that the structural representation of the horizontal self-balancing centrifugal pump that the utlity model has chopped-off head composite impeller.In this embodiment, the described horizontal self-balancing centrifugal pump with chopped-off head composite impeller adopts mechanical seal mode, in other embodiments, the described horizontal self-balancing centrifugal pump with chopped-off head composite impeller can also adopt gland sealed mode, this is prior art, is not repeated herein.
Referring to Fig. 1, the horizontal self-balancing centrifugal pump 100 that the utlity model has chopped-off head composite impeller comprises stator component and rotor part.
Described stator component comprise along described in there is the inlet segment axially setting gradually 101, stage casing 102, water exit end 103 and the secondary suction casing 104 of the horizontal self-balancing centrifugal pump 100 of chopped-off head composite impeller.Described inlet segment 101, stage casing 102, water exit end 103 and secondary suction casing 104 are fixing by turnbuckle assembly 109.In this embodiment, described stator component also comprises drive end bearing parts 110, non-driven-end bearing parts 111 and sealed letter body 112, and described drive end bearing parts 110, non-driven-end bearing parts 111 and sealed letter body 112 are separately fixed on inlet segment 101 or secondary suction casing 104 by double-screw bolt or bolt (not indicating in accompanying drawing).Described stator component also comprises the stator (not indicating in accompanying drawing) that closes on first stage impeller 105, front impeller 106, rear impeller 107 and the impeller 108 of described rotor part and arrange.
Described rotor part comprises pump shaft (in accompanying drawing do not indicate) and is fixed on first stage impeller 105 on pump shaft and front impeller 106, rear impeller 107, impeller 108.Described first stage impeller 105 and front impeller 106 are symmetrical arranged with rear impeller 107 and impeller 108, and to form self-balance structure, balancing axial thrust, has solved axial force balance mechanism and damaged the problem that affects the normal operation of pump.
Figure 2 shows that the structural representation of the utility model first stage impeller, Figure 3 shows that the sectional view of the utility model first stage impeller.Referring to Fig. 2 and Fig. 3, described first stage impeller 105 comprises front shroud 201, blade and back shroud 202.
Described front shroud 201 center is chopped-off head impeller inlet 203, and fed sheet of a media enters described first stage impeller from described first stage impeller import 203.The edge of described front shroud 201 and back shroud 202 is chopped-off head impeller outlet 204, and fed sheet of a media is discharged from described first stage impeller outlet 204.In this embodiment, described front shroud 201 and back shroud 202 are disc structure.
Described blade is arranged between front shroud 201 and back shroud 202, and blade and front shroud 201 and back shroud 202 be integrated, and three can one cast molding.Described blade comprises multiple linear leafs 205 and multiple short blade 206, described linear leaf 205 and described short blade 206 interval alternative arrangements, to form impeller channel, the side at described impeller channel near first stage impeller import 203, described linear leaf 205 is longer than described short blade 206.
The blade structure that first stage impeller of the present utility model adopts linear leaf 205 and short blade 206 intervals to be arranged alternately, form chopped-off head composite impeller, can increase the area of first stage impeller import 203, reduce inlet velocity, improve the suction performance of centrifugal pump, well avoided the cavitation phenomenons of centrifugal pump in the time that large-capacity point moves, make centrifugal pump there is high-cavitation-resistance energy, avoid the damage of cavitation phenomenons to centrifugal pump, effectively extended the working life of centrifugal pump.Some mines, chemical industry are solved, the problem of the device pump cavitation that power plant etc. have relatively high expectations to cavitation performance.Simultaneously first stage impeller exports 204 places' lobe numbers increases, and can reduce on the one hand or prevent from exporting the separation of flow and the impact of backflow phenomenon on impeller performance.
The horizontal self-balancing centrifugal pump that the utlity model has chopped-off head composite impeller is rational in infrastructure, simply compact, and axial dimension is little, operate steadily, safe and reliable, and the installation, maintenance feature such as quick easy to detect.The pump generation problem of cavitation more using, because its outline overall and installing dimensions can be in full accord with former pump, and can improve anti-cavitation performance, is the ideal scheme that solves in-service pump generation problem of cavitation.
Further, in this embodiment, described linear leaf 205 and short blade 206 be shaped as cylinder blade or twisted blade.Further, described short blade 206 length are 0.5 ~ 0.6 times of linear leaf 205 length.Described short blade 206 is set to biasing, and the working surface that is biased to distance blade 205 207 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 lobe numbers is even number, and preferably, described linear leaf 205 is altogether 6 ~ 10 with short blade 206.
Further, between described inlet segment 101, stage casing 102, water exit end 103 and secondary suction casing 104, adopt the seal with elastometic washer of O shape.
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 principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (7)
1. one kind has the horizontal self-balancing centrifugal pump of chopped-off head composite impeller, it is characterized in that, comprise stator component and rotor part, comprise stator component and rotor part, stator component comprises that edge has the inlet segment axially setting gradually, stage casing, water exit end and the secondary suction casing of the horizontal self-balancing centrifugal pump of chopped-off head composite impeller, rotor part comprises pump shaft and is fixed on the first stage impeller on pump shaft, front impeller, rear impeller, impeller, first stage impeller and front impeller and rear impeller and impeller are symmetrical arranged, with balancing axial thrust; First stage impeller comprises front shroud, blade and back shroud, blade is arranged between front shroud and back shroud, and blade and front shroud and back shroud are integrated, blade comprises multiple linear leafs and multiple short blade, linear leaf and short blade interval alternative arrangement, to form impeller channel, in a side of the import of described impeller, linear leaf is longer than short blade.
2. the horizontal self-balancing centrifugal pump with chopped-off head composite impeller according to claim 1, is characterized in that, described linear leaf and short blade be shaped as cylinder blade or twisted blade.
3. the horizontal self-balancing centrifugal pump with chopped-off head composite impeller according to claim 1, is characterized in that, described short blade length is 0.5 ~ 0.6 times of linear leaf length.
4. the horizontal self-balancing centrifugal pump with chopped-off head composite impeller 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.
5. the horizontal self-balancing centrifugal pump with chopped-off head composite impeller according to claim 1, is characterized in that, described lobe numbers is even number.
6. the horizontal self-balancing centrifugal pump with chopped-off head composite impeller according to claim 5, is characterized in that, linear leaf and short blade are altogether 6 ~ 10.
7. the horizontal self-balancing centrifugal pump with chopped-off head composite impeller according to claim 1, is characterized in that, adopts the seal with elastometic washer of O shape between described inlet segment, stage casing, water exit end and secondary suction casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420162602.2U CN203796618U (en) | 2014-04-04 | 2014-04-04 | Horizontal self-balancing centrifugal pump with first-stage combination impeller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420162602.2U CN203796618U (en) | 2014-04-04 | 2014-04-04 | Horizontal self-balancing centrifugal pump with first-stage combination impeller |
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| Publication Number | Publication Date |
|---|---|
| CN203796618U true CN203796618U (en) | 2014-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420162602.2U Expired - Lifetime CN203796618U (en) | 2014-04-04 | 2014-04-04 | Horizontal self-balancing centrifugal pump with first-stage combination impeller |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953583A (en) * | 2014-04-04 | 2014-07-30 | 上海第一水泵厂有限公司 | Horizontal self-balanced centrifugal pump with first-stage compound impeller |
| CN106949089A (en) * | 2017-05-19 | 2017-07-14 | 强胜精密机械(苏州)有限公司 | Two-stage Turo pump |
-
2014
- 2014-04-04 CN CN201420162602.2U patent/CN203796618U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953583A (en) * | 2014-04-04 | 2014-07-30 | 上海第一水泵厂有限公司 | Horizontal self-balanced centrifugal pump with first-stage compound impeller |
| CN106949089A (en) * | 2017-05-19 | 2017-07-14 | 强胜精密机械(苏州)有限公司 | Two-stage Turo pump |
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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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140827 |