CN101440814A - Double-suction pump - Google Patents
Double-suction pump Download PDFInfo
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- CN101440814A CN101440814A CNA2008102402494A CN200810240249A CN101440814A CN 101440814 A CN101440814 A CN 101440814A CN A2008102402494 A CNA2008102402494 A CN A2008102402494A CN 200810240249 A CN200810240249 A CN 200810240249A CN 101440814 A CN101440814 A CN 101440814A
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- pump
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- suction
- impeller
- shaft
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Abstract
The invention relates to a small-sized double-suction pump, which comprises a pump housing and a double-suction impeller arranged on a pump shaft, wherein the double-suction impeller is arranged in the pump housing; the pump housing is provided with a water inlet and a pressure outlet; and the opening direction of the pressure outlet is vertical to the opening direction of the water inlet and vertical to the axial lead of the pump shaft. The small-sized double-suction pump adopts a structure that the pressure outlet is vertical to the water inlet, can effectively improve system device efficiency, and the adoption of the V-typed double-suction impeller can effectively improve flow state of an outlet of the impeller and pressure fluctuation phenomenon of a water pump. The small-sized double-suction pump ensures that the structures of the water pump and a pipeline fitting are more compact, reduces occupied area of installation, simultaneously makes the running more stable and reliable and has broad market prospect.
Description
Technical field
The present invention relates to a kind of double suction pump, opening volute type centrifugal pump in particularly a kind of small size single stage dual-sucking level.
Background technique
The double-suction centrifugal pump of present domestic extensive use mainly contains series such as Sh, S, SA, its common feature is the water intake of pump and extrudes mouth all below the pump shaft axis, the mating face of entire pump was the horizontal flange of shaft axis, be pump import and the outlet axis all in horizontal direction, vertical with pump shaft.As long as when water pump is out of order maintenance, unclamp the nut on pump cover mating face, can open pump cover, whole parts are pulled down, and needn't be dismantled motor and pipeline, see Fig. 1.Therefore it is a kind of relatively reasonable structure form for the maintenance of big-and-middle-sized double suction pump.Simultaneously because this pump adopts single-stage double-suction formula impeller, the blade wheel structure symmetry, the axial force that acts on during operation on the impeller cover of the left and right sides is cancelled out each other, therefore this pump does not generally need ad hoc axial thrust balancing devices, operate steadily, noise is little, is widely used in factory, mine, urban water supply and sewerage, basin water diversion project and agricultural drainage and irrigation etc.
But the double suction pump type water inlet aperture scope of producing is 200～1600mm (Guan Xingfan " a modern pump technical manual ") at present, and bore is selected single stage single suction volute pump for use usually less than the pump type of 200mm.In the engineering of big flow is used, often need a plurality of single stage single suction volute pumps parallel connections are used to meet the demands, both increased equipment investment and installation difficulty, reduced system and device efficient again.
The water intake of double suction pump at present commonly used and extrusion mouth all are positioned at pump shaft axis below, and the center line of intake-outlet is overlapping.It is big that the water pump of this structural type is not only installed floor space, and as the water lift time spent, must an elbow be installed respectively at intake-outlet, and be difficult for discharging bubble etc., fluidised form in the influence pipe, thus reduced the system and device efficient of water pump to a certain extent.Simultaneously have institute near liquid flow velocity under the effect of boundary layer at front shroud place in the conventional impeller of centrifugal pump and reduces, normal formation whirlpool between front shroud and spiral case influences the impeller outlet fluidised form, also can cause the decline of pump efficiency.
Summary of the invention
Purpose of the present invention just is to provide a kind of double suction pump to address the aforementioned drawbacks.
For achieving the above object, technological scheme of the present invention is to adopt a kind of double suction pump, comprise pump case and be installed in double-entry impeller on the pump shaft, described double-entry impeller is installed in the described pump case, described pump case is provided with water intake and extrudes mouth, the described opening direction that extrudes mouthful is perpendicular to the opening direction of described water intake, and perpendicular to the shaft axis of described pump shaft.
Wherein, described pump case comprises the pump cover and the pump housing, and the described pump housing and pump cover are opened the face subdivision in the level by described pump shaft shaft axis, and described pump cover comprises suction chamber and last pumping chamber, and the described pump housing comprises suction chamber and following pumping chamber down.
Wherein, the outlet limit of described double-entry impeller is V-shape.
Wherein, the angle of described V-shape is 170 °～175 °.
The present invention adopts and extrudes a mouthful structure vertical with water intake, can effectively improve system and device efficient, and the employing of V-shape double-entry impeller can effectively improve the impeller outlet fluidised form, and the pressure pulsation phenomenon of water pump.The invention enables water pump and pipeline fittings structure compact more, reduced the installation floor space, operation simultaneously is more reliable and more stable, has vast market prospect.
Description of drawings
Fig. 1 is traditional double suction pump structural drawing;
Fig. 2 is a double suction pump structural drawing of the present invention;
Fig. 3 is the section in A-A cross section among Fig. 2;
Fig. 4 is the fluidised form schematic representation of the double-entry impeller of double suction pump of the present invention;
Fig. 5 is the structural drawing of V-shape double-entry impeller of the present invention.
Among the figure: 1, water intake; 2, suction chamber; 3, pumping chamber; 4, pump cover; 5, the pump housing; 6, extrude mouth; 61, extrude mouth; 7, double-entry impeller; 8, sleeve nut; 9, pump shaft.
Embodiment
Following examples are used to illustrate the present invention, but are not used for limiting the scope of the invention.
As Fig. 2, shown in Figure 3, double suction pump of the present invention comprises the pump case that is made of the pump cover 4 and the pump housing 5 and the pump shaft 9 and the double-entry impeller 7 that are located in the pump case, double-entry impeller 7 is fixed on the pump shaft 9 by the sleeve nut 8 of key, axle sleeve and both sides, and axial position can be adjusted by sleeve nut 8.The pump cover 4 and the pump housing 5 form the suction chamber 2 of half-spiral and the pumping chamber 3 of volute.In the level of the shaft axis by described pump shaft 9, open the face subdivision, the last suction chamber part of pump cover 4 corresponding suction chambers 2 and the last pumping chamber part of pumping chamber 3, the following suction chamber of the pump housing 5 corresponding suction chambers 2 is partly and the following pumping chamber part of pumping chamber 3.
Pump case is provided with water intake 1 and extrudes mouthfuls 61, extrudes mouthfuls 61 the opening direction opening direction perpendicular to water intake 1, and perpendicular to the shaft axis of pump shaft 9.As shown in Figure 4, it is 170 °～175 ° V-shape structure that the outlet limit of double-entry impeller 7 is cut into angle, the outlet that the V-shape structure can effectively be improved double-entry impeller 7 is owing to the whirlpool, the backflow phenomenon that influenced by the boundary layer to produce, as a among Fig. 5 figure with shown in the b figure (among Fig. 5, a figure is that the V-shape structure is adopted on the outlet limit, and b figure is that outlet limit external diameter is identical).By numerical simulation calculation as can be known, be 130～150 small capacity double sucking pump for specific speed, when double-entry impeller outlet limit angle was 170 °～175 °, the impeller outlet fluidised form was better, is beneficial to the raising pump efficiency.
The present invention is owing to the structural symmetry of double-entry impeller, and the hydraulic performance of water pump can not change because of the difference that extrudes mouthful axial direction.Yet when the axial direction that extrudes mouth was vertical direction, water pump can reduce the use of an elbow when being connected with the extrusion pipeline, thereby has reduced the local losses of pipeline.Simultaneously, the discharge of bubble can improve fluidised form in the pipeline in helping managing.Therefore, structural type of the present invention can improve system and device efficient.
In addition, the present invention adopts double-entry impeller V-shape structure, makes that the gap between the outlet of cut water and double-entry impeller increases, thereby can effectively reduce the influence of pressure pulsation to pump performance.
The invention enables water pump and pipeline fittings structure compact more, reduce to install floor space, operation simultaneously is more reliable and more stable, has vast market prospect.
More than be preferred forms of the present invention, according to content disclosed by the invention, those of ordinary skill in the art can expect some identical, replacement schemes apparently, all should fall into the scope of protection of the invention.
Claims (4)
1, a kind of double suction pump, the double-entry impeller (7) that comprise pump case, is located at pump shaft on (9), described double-entry impeller (7) is located in the described pump case, described pump case is provided with water intake (1) and extrudes mouthful (61), it is characterized in that, the described opening direction that extrudes the opening direction of mouthful (61) perpendicular to described water intake (1), and perpendicular to the shaft axis of described pump shaft (9).
2, double suction pump as claimed in claim 1, it is characterized in that, described pump case comprises the pump cover (4) and the pump housing (5), the described pump housing (5) and pump cover (4) are opened the face subdivision in the level by described pump shaft (9) shaft axis, described pump cover (4) comprises suction chamber and last pumping chamber, and the described pump housing (5) comprises suction chamber and following pumping chamber down.
As the described double suction pump of claim 1～2, it is characterized in that 3, the outlet limit of described double-entry impeller (7) is V-shape.
4, double suction pump as claimed in claim 3 is characterized in that, the angle of described V-shape is 170 °～175 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102402494A CN101440814A (en) | 2008-12-18 | 2008-12-18 | Double-suction pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008102402494A CN101440814A (en) | 2008-12-18 | 2008-12-18 | Double-suction pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101440814A true CN101440814A (en) | 2009-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008102402494A Pending CN101440814A (en) | 2008-12-18 | 2008-12-18 | Double-suction pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101440814A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958535A (en) * | 2017-05-19 | 2017-07-18 | 强胜精密机械(苏州)有限公司 | Double suction Turo pump |
| CN107023490A (en) * | 2017-05-22 | 2017-08-08 | 江苏大学 | A kind of half-spiral inlet type double suction self priming pump |
| CN107100856A (en) * | 2017-06-08 | 2017-08-29 | 江苏河海给排水成套设备有限公司 | A kind of heavy duty detergent high suction depth formula dry type double entry pump |
| CN110043473A (en) * | 2019-05-23 | 2019-07-23 | 湖南机电职业技术学院 | Double suction sewage pump |
-
2008
- 2008-12-18 CN CNA2008102402494A patent/CN101440814A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106958535A (en) * | 2017-05-19 | 2017-07-18 | 强胜精密机械(苏州)有限公司 | Double suction Turo pump |
| CN107023490A (en) * | 2017-05-22 | 2017-08-08 | 江苏大学 | A kind of half-spiral inlet type double suction self priming pump |
| CN107023490B (en) * | 2017-05-22 | 2020-01-24 | 江苏大学 | Semi-spiral water inlet type double-suction self-sucking pump |
| CN107100856A (en) * | 2017-06-08 | 2017-08-29 | 江苏河海给排水成套设备有限公司 | A kind of heavy duty detergent high suction depth formula dry type double entry pump |
| CN107100856B (en) * | 2017-06-08 | 2024-01-09 | 江苏河海给排水成套设备有限公司 | High-efficient formula dry-type double suction pump that absorbs highly |
| CN110043473A (en) * | 2019-05-23 | 2019-07-23 | 湖南机电职业技术学院 | Double suction sewage pump |
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Open date: 20090527 |