CN201381989Y - Double-inlet self-balance multiple-stage centrifugal pump - Google Patents
Double-inlet self-balance multiple-stage centrifugal pump Download PDFInfo
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- CN201381989Y CN201381989Y CN200920127082U CN200920127082U CN201381989Y CN 201381989 Y CN201381989 Y CN 201381989Y CN 200920127082 U CN200920127082 U CN 200920127082U CN 200920127082 U CN200920127082 U CN 200920127082U CN 201381989 Y CN201381989 Y CN 201381989Y
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- pump
- impeller
- centrifugal pump
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Abstract
The utility model relates to a double-inlet self-balance multiple-stage centrifugal pump, wherein the two ends of the pump are respectively used as inlets (double inlets), and are symmetrically provided with a plurality of single-stage impellers which can overlap to form a multi-stage impeller, and the middle portion of the pump is used as an outlet which is composed of double suction impellers. As the two ends of the pump are the inlets of the pump, and conveying medium does not need pressurizing by the impellers, the high-pressure end does not exist, and a balance water pipe does not need arranging, simultaneously, as the axial force generated by the impellers of the pump automatically balances, and the pressure on two ends of the double suction impeller is basically equal, a sealing device for high and low pressure regions does not need arranging, thereby avoiding the capacity loss caused by a balance water pipe and a sealing device arranged in an existing multi-stage centrifugal pump, and increasing the efficiency. And the double-inlet self-balance multiple-stage centrifugal pump is simpler than a multi-stage centrifugal pump which is composed of double suction impellers.
Description
Technical field
The utility model relates to a kind of double feed inlet self-balanced multiple-stage centrifugal pump, and its structural type is horizontal, comprises two kinds of double feed inlet self-balanced multiple-stage centrifugal pumps of sectional type and scroll casing type.
Background technique
Existing multistage centrifugal pump comprises that mainly impeller from left to right or two kinds of structures of ZD type self-balanced multiple-stage centrifugal pump of the D type that is arranged in order from right to left, DG type multistage centrifugal pump and impeller symmetric arrangement axial force self-balancing, this class pump is all the other multistage centrifugal pumps of forming for single suction impeller of double-entry impeller by single suction impeller or chopped-off head all, also by being the multistage centrifugal pump that double-entry impeller is formed entirely.For the multistage centrifugal pump that full double-entry impeller is formed, owing to adopt double-entry impeller, impeller progression can cause impeller inter-stage runner very complicated for a long time, is not easy to realize, the multistage centrifugal pump that general double-entry impeller is formed has only 2 to 3 grades.To D type, DG type multistage centrifugal pump that impeller is arranged in order, fed sheet of a media is to export to the other end from an end import; To the ZD type self-balanced multiple-stage centrifugal pump of impeller symmetric arrangement axial force self-balancing, fed sheet of a media is to enter from an end import, receives the other end by honeycomb duct again and discharge from the centre outlet then near the neutral position time; Though the multistage centrifugal pump inter-stage runner that double-entry impeller is formed is very complicated, all has only an import, an outlet comes fed sheet of a media.
The multistage centrifugal pump of said structure often needs to be provided with the pressure that balancing pipeline reduces pump high voltage terminal axle envelope place in order to guarantee the validity of pump high voltage terminal sealing.The multistage centrifugal pump that the pump of impeller symmetric arrangement and double-entry impeller are formed also need be provided with a large amount of leakages that seal arrangement prevents medium at pump high low pressure subregion place.And balancing pipeline and seal arrangement the inevitable volumetric loss that strengthens pump is set, reduced the efficient of pump.
The model utility content
At the prior art above shortcomings, the purpose of this utility model provides a kind of double feed inlet self-balanced multiple-stage centrifugal pump that can avoid above-mentioned two places volumetric loss, structure to compare the simpler brand new form of being made up of double-entry impeller of multistage centrifugal pump fully.
The technical solution of the utility model is achieved in that the double feed inlet self-balanced multiple-stage centrifugal pump, comprise medium import and outlet, the multi-stage impeller that is built up for some impellers between import and the outlet, it is characterized in that: described outlet is in the centre of pump, the corresponding impeller of outlet is a double-entry impeller, import is two two ends that are positioned at pump, and the multi-stage impeller between two ends import and the outlet is along the corresponding double-entry impeller symmetric arrangement of outlet.The some single impeller of forming multi-stage impeller is single suction impeller.
This double feed inlet self-balanced multiple-stage centrifugal pump comprises that the two ends pump body structure is that sectional type double feed inlet self-balanced multiple-stage centrifugal pump and the pump body structure that stator, middle water outlet housing are spiral case is the double feed inlet self-balanced multiple-stage centrifugal pump of spiral case entirely.
The utility model does not exist high voltage terminal just not to need not have horizontalization Hengshui pipe because the pump two ends all are imports of pump, and fed sheet of a media is not also pressurizeed by impeller; Simultaneously because two ends single-stage impeller symmetric arrangement, double-entry impeller is arranged in the pump discharge place, the axial force automatic balancing that this pump impeller produces, the basic identical seal arrangement that does not also just need to be provided with the height nip of the pressure at double-entry impeller two ends, also just reduced the leakage of pump, thereby avoided existing multistage centrifugal pump that the volumetric loss that balancing pipeline and seal arrangement bring is set, improved efficient.And the utility model is simpler than the multistage centrifugal pump structure of being made up of double-entry impeller.
Description of drawings
Fig. 1-the utility model sectional type double feed inlet self-balanced multiple-stage centrifugal pump structural representation;
Fig. 2-the utility model scroll casing type double feed inlet self-balanced multiple-stage centrifugal pump structural representation.
Arrow is represented the media flow direction among the figure.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing.
This double feed inlet self-balanced multiple-stage centrifugal pump is to be provided with that balancing pipeline and height nip seal arrangement have caused unnecessary volumetric loss and the multistage centrifugal pump of the new structure that proposes for fear of existing multistage centrifugal pump, also is simultaneously the multistage centrifugal pump of the new structure that proposes for the labyrinth that reduces the multistage centrifugal pump case of being made up of double-entry impeller.The structural feature of this double feed inlet self-balanced multiple-stage centrifugal pump is the two ends import (double feed inlet) that is respectively pump and by some single-stage impeller symmetric arrangement (requiring single-stage impeller identical and symmetric arrangement of all the other structures except that the rotation direction difference at two ends), the multi-stage impeller that some single suction impellers are built up, the centre constitutes for delivery side of pump and by double-entry impeller.Double-entry impeller housing in the middle of the pump need be designed to scroll casing type, and the single-stage impeller housing at two ends both can be designed to the stator formula also can be designed to scroll casing type.When becoming the stator formula, the case design at two ends is equivalent to the D type pump of two parallel runnings by the back-to-back operation that is cascaded of double-entry impeller; Form multistage centrifugal pump when housing is designed to the double-entry impeller that voluted type is equivalent to multistage voluted type entirely, but the simpler and easy casting processing of its structure is come out.Comprise that promptly the shell construction form is that the sectional type double feed inlet self-balanced multiple-stage centrifugal pump and the shell construction of stator is the scroll casing type double feed inlet self-balanced multiple-stage centrifugal pump of volute entirely.Respectively these two kinds of structures are elaborated below.
Fig. 1 is the utility model sectional type double feed inlet self-balanced multiple-stage centrifugal pump structural representation, and structural type is that two ends are imports 7 of pump, and the centre is a delivery side of pump 8, and two ends are by single suction impeller 2 symmetric arrangement, and the two ends pump body structure is a stator; The centre is a double-entry impeller 6, and housing is a volute.From the figure as can be seen, structure is identical but some single suction impellers 2 that rotation direction is different are arranged symmetrically in the two ends of double-entry impeller 6, the inlet segment 1 at pump housing two ends constitutes the two ends import 7 of sectional type double feed inlet self-balanced multiple-stage centrifugal pump, and voluted type water exit end 5 constitutes the central exit 8 of double feed inlet self-balanced multiple-stage centrifugal pump.The stator 3 identical with single suction impeller 2 rotation directions is contained in stage casing 4 inlet segment 1, voluted type water exit ends 5 also interior and two ends and constituted sectional type double feed inlet self-balanced multiple-stage centrifugal pump housing.The pump fed sheet of a media enters single suction impeller 2 and enters double-entry impeller 6 after the pressurization step by step from two ends inlet segment 1 simultaneously, enters delivery side of pump 8 from voluted type water exit end 5 at last.(two ends impeller progression can increase and decrease simultaneously owing to two ends single-stage impeller 2 symmetric arrangement, impeller progression is only for signal among the figure), the axial force automatic balancing that this pump impeller produces is not simultaneously owing to there is the seal arrangement of balancing pipeline and high low area, also just reduce the leakage of pump, improved efficient.
Fig. 2 is the new scroll casing type double feed inlet self-balanced multiple-stage centrifugal pump structural representation that proposes, and structural type is that two ends are imports 7 of pump, and the centre is a delivery side of pump 8, and the pump two ends are by single suction impeller 2 symmetric arrangement, and the centre is a double-entry impeller 6, and housing is volute entirely.As can be seen, the pump housing 9 of scroll casing type runner, pump cover 10 constitute the housing of scroll casing type double feed inlet self-balanced multiple-stage centrifugal pumps from the figure, and the housing two ends are left import 7 respectively and constituted double feed inlets, are delivery side of pump 8 in the middle of the housing.Structure is identical but some single suction impellers 2 that rotation direction is different are arranged symmetrically in the two ends of double-entry impeller 6.The pump fed sheet of a media enters single suction impeller 2 and enters double-entry impeller 6 after the pressurization step by step from the pump housing 9, pump cover 10 two ends imports simultaneously, enters delivery side of pump 8 from the pump housing 9, pump cover 10 middle runners at last.Because the fed sheet of a media of pump two ends inlet is not also pressurizeed by impeller, pressure is lower, has guaranteed the axle envelope 11 sealing validity at this place, and this pump does not have the seal arrangement of balancing pipeline and high low area simultaneously, has just reduced the leakage of pump yet, has improved efficient.Pump two ends single-stage impeller symmetric arrangement (impeller progression can increase and decrease simultaneously, and the impeller progression among the figure is only for signal) in addition, the axial force automatic balancing that this pump impeller produces.
Mark 12 among Fig. 1 and Fig. 2 is the fore bearing parts, and 13 is the rear bearing parts, and 14 is pump seat, and the mark 15 among Fig. 2 is the mechanical seal parts.
The double feed inlet self-balanced multiple-stage centrifugal pump does not have balancing pipeline and high low pressure seal arrangement, has improved pump group efficient, and pump is made the axial force automatic balancing of impeller generation by self structure.
Though this double feed inlet self-balanced multiple-stage centrifugal pump has two imports, these two imports are actual at front end to be to be formed by a total import branch.
Claims (4)
1, double feed inlet self-balanced multiple-stage centrifugal pump, comprise medium import (7) and outlet (8), the multi-stage impeller that is built up for some impellers between import (7) and the outlet (8), it is characterized in that: described outlet (8) is in the centre of pump, the corresponding impeller of outlet (8) is double-entry impeller (6), import (7) is two two ends that are positioned at pump, and the multi-stage impeller between two ends import (7) and the outlet (8) is along corresponding double-entry impeller (6) symmetric arrangement of outlet.
2, double feed inlet self-balanced multiple-stage centrifugal pump according to claim 1 is characterized in that: the some single impeller of forming multi-stage impeller is single suction impeller (2).
3, double feed inlet self-balanced multiple-stage centrifugal pump according to claim 1 and 2 is characterized in that: this centrifugal pump is the sectional type double feed inlet self-balanced multiple-stage centrifugal pump that stator (3), middle water outlet housing are volute for the two ends pump body structure.
4, double feed inlet self-balanced multiple-stage centrifugal pump according to claim 1 and 2 is characterized in that: this centrifugal pump is that housing is the double feed inlet self-balanced multiple-stage centrifugal pump of voluted type entirely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920127082U CN201381989Y (en) | 2009-04-21 | 2009-04-21 | Double-inlet self-balance multiple-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200920127082U CN201381989Y (en) | 2009-04-21 | 2009-04-21 | Double-inlet self-balance multiple-stage centrifugal pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201381989Y true CN201381989Y (en) | 2010-01-13 |
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ID=41525466
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200920127082U Expired - Lifetime CN201381989Y (en) | 2009-04-21 | 2009-04-21 | Double-inlet self-balance multiple-stage centrifugal pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201381989Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936293A (en) * | 2010-09-13 | 2011-01-05 | 赵景权 | Double-inlet large-flow multistage centrifugal pump |
| CN102086873A (en) * | 2011-03-10 | 2011-06-08 | 赵景权 | Self-balancing axial force multi-stage centrifugal pump with variable flow rate and total head |
| CN108457895A (en) * | 2018-01-09 | 2018-08-28 | 黄昌金 | A kind of axis stream opposite direction turbine |
| CN110630507A (en) * | 2019-08-14 | 2019-12-31 | 湖南自平衡多级泵制造有限公司 | Double-suction type full-symmetry multistage pump |
-
2009
- 2009-04-21 CN CN200920127082U patent/CN201381989Y/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101936293A (en) * | 2010-09-13 | 2011-01-05 | 赵景权 | Double-inlet large-flow multistage centrifugal pump |
| CN102086873A (en) * | 2011-03-10 | 2011-06-08 | 赵景权 | Self-balancing axial force multi-stage centrifugal pump with variable flow rate and total head |
| CN108457895A (en) * | 2018-01-09 | 2018-08-28 | 黄昌金 | A kind of axis stream opposite direction turbine |
| CN110630507A (en) * | 2019-08-14 | 2019-12-31 | 湖南自平衡多级泵制造有限公司 | Double-suction type full-symmetry multistage 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: 20100113 |