CN203906302U - Vertical self-balancing multi-stage centrifugal pump - Google Patents
Vertical self-balancing multi-stage centrifugal pump Download PDFInfo
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- CN203906302U CN203906302U CN201420328274.9U CN201420328274U CN203906302U CN 203906302 U CN203906302 U CN 203906302U CN 201420328274 U CN201420328274 U CN 201420328274U CN 203906302 U CN203906302 U CN 203906302U
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- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 238000003825 pressing Methods 0.000 claims description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005086 pumping Methods 0.000 abstract 1
- 230000009467 reduction Effects 0.000 description 7
- 239000002245 particle Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 238000009434 installation Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000005452 bending Methods 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
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Abstract
The utility model discloses a vertical self-balancing multi-stage centrifugal pump. The centrifugal pump comprises a pump shaft, a suction segment, a plurality of first middle segments, a spitting segment, a plurality of second middle segments and a secondary suction segment, wherein the suction segment, the first middle segments, the spitting segment, the second middle segments and the secondary suction segment are sequentially arranged along the pump shaft. Impellers are installed in all the first middle segments. Reverse impellers are installed in all the second middle segments. The last-stage reverse impeller in the second middle segment close to the spitting segment is provided with a back blade which can drive pumping media to rotate, and the back blade is located on the side, close to the spitting segment, of the last-stage reverse impeller. The vertical self-balancing multi-stage centrifugal pump has the advantages of being small in floor space, stable in operation, convenient to start, long in service life and the like.
Description
Technical field
The utility model relates to a kind of centrifugal pump, is specifically related to a kind of vertical self-balanced multiple-stage centrifugal pump.
Background technique
Running is safe and steady, noise is low, high reliability, just progressively replaces common multistage pump because having for self-balanced multiple-stage centrifugal pump, obtains applying more and more widely.
Fig. 1 shows a kind of structure of existing self-balanced multiple-stage centrifugal pump, and existing self-balanced multiple-stage centrifugal pump still exists following subject matter: 1, be horizontal installation, floor space is large, cost of production is high; 2, there is the phenomenon that causes pump shaft 1 bending because of Action of Gravity Field, thereby easily produce vibration and inter deterioration while causing pump operation; 3, the gap between the anti-impeller 7 of final stage and impeller 18 is easily because wearing and tearing increase, especially obvious in the time that medium contains hard particles.Gap between the anti-impeller 7 of final stage and impeller 18 is larger, and the vibration of leakage rate and pump is also larger, thereby has influence on efficiency and the running stability of pump, and greatly reduced the working life of pump; 4, be arranged on honeycomb duct 20 on Spit Section 4 and secondary suction casing 6 because manufacturing and assembly precision requires high reason, its interchangeability and can assembling performance bad, badly influences the production of pump or repairs efficiency.
Model utility content
The technical problems to be solved in the utility model is to overcome the deficiency that prior art exists, and the vertical self-balanced multiple-stage centrifugal pump that a kind of floor space is little, operate steadily, start convenience, long service life is provided.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
A kind of vertical self-balanced multiple-stage centrifugal pump, the suction casing that comprises pump shaft and set gradually along described pump shaft, multiple the first stage casing, Spit Section, multiple the second stage casing and secondary suction casing, in each first stage casing, be all equiped with impeller, in each the second stage casing, be all equiped with anti-impeller, be provided with the back blades that can drive pumped medium to rotate near the anti-impeller of final stage in the second stage casing of Spit Section, described back blades is positioned at the side of the anti-impeller of described final stage near described Spit Section.
As further improvement of the utility model:
The curved rib shape of described back blades.
On the anti-impeller of described final stage, along being circumferentially evenly provided with multiple back blades, each back blades one is connected on the back shroud of the anti-impeller of described final stage.
Described centrifugal pump is provided with the annular housing of the shell in described multiple the second stage casings of parcel, is communicated with by described annular housing near the outlet of the impeller in the first stage casing of Spit Section with the entrance of described secondary suction casing.
Dismountable sleeve that is connected with between the shell of described Spit Section and the shell of described secondary suction casing, forms described annular housing between described sleeve and the shell in multiple the second stage casings.
On the shell of described Spit Section and the shell of secondary suction casing, be equipped with inner stopper, one end of described sleeve is inserted in the inner stopper of described Spit Section, the other end of described sleeve is inserted in the inner stopper of described secondary suction casing, is all equiped with seal ring between the shell of described Spit Section and sleeve and between the shell of described secondary suction casing and sleeve.
Between the outer wall of described sleeve and the shell of Spit Section and the shell of secondary suction casing, be provided with mounting groove, described seal ring is installed in mounting groove, the shell of described Spit Section or and the shell of secondary suction casing on be also connected with by fastening piece the pressing plate that is fixed seal ring.
Described multistage centrifugal pump also comprises motor, and described motor is connected with described pump shaft by rigid coupling parts.
Be single stage single suction cantilever type impeller near the first stage impeller in the first stage casing of suction casing.
Compared with prior art, the utility model has the advantage of:
1, than the horizontally-mounted self-balanced multiple-stage centrifugal pump of tradition, the vertical self-balanced multiple-stage centrifugal pump of the utility model adopts vertical installation, its floor space is little, cost of production is low, and pump shaft do not exist the buckling phenomenon causing due to gravity, thereby operation is also more steady.In the time carrying high temperature media, there will not be the phenomenon that causes pump bending in horizontal pump because of the temperature difference of pump top and the bottom, thereby can save for the requisite warming-up device of horizontal pump and warming-up process, make priming of pump convenient;
2, a side near Spit Section on the anti-impeller of final stage is provided with back blades, when pump operation, back blades rotarily drives pumped medium and rotates, produce the pressure of the pressure reduction opposite direction at the two ends, gap between the anti-impeller of final stage and impeller, this pressure energy is offset and is approximately equivalent to the pressure that one-level impeller produces, thereby reduce the pressure reduction at the two ends, gap between the anti-impeller of final stage and impeller, after this pressure reduction reduces, leakage rate reduces also in direct ratioly, reduce the leakage of pumped medium, also the wearing and tearing of this gap location have been alleviated, reach the energy efficiency of maintenance pump and the object of running stability of longer time, extend the working life of pump.Meanwhile, the solid particle comprising in pumped medium is thrown toward the external diameter direction of the anti-impeller of final stage under the effect of centrifugal force, thereby has reduced the solid particle quantity that enters the gap between the anti-impeller of final stage and impeller, further alleviates the wearing and tearing in this gap;
3, Spit Section is positioned at the centre of pump, pump discharge flange on it is only located at common MODEL VERTICAL MULTISTAGE PUMP only about half of of pump the topmost part for Spit Section with respect to the height of pump attachment face, the active force of the rising pipe of pump significantly reduces the adverse effect of pump, is conducive to operating steadily of pump.
Brief description of the drawings
Fig. 1 is the main sectional structure schematic diagram of existing self-balanced multiple-stage centrifugal pump.
Fig. 2 is the main sectional structure schematic diagram of the vertical self-balanced multiple-stage centrifugal pump of the utility model.
Fig. 3 is the main sectional structure schematic diagram in the part of the vertical self-balanced multiple-stage centrifugal pump of the utility model.
Fig. 4 is A place structure for amplifying schematic diagram in Fig. 3.
Fig. 5 is B place structure for amplifying schematic diagram in Fig. 3.
Fig. 6 be in the vertical self-balanced multiple-stage centrifugal pump of the utility model the anti-impeller of final stage look up structural representation.
Marginal data:
1, pump shaft; 2, suction casing; 3, the first stage casing; 4, Spit Section; 5, the second stage casing; 6, secondary suction casing; 7, the anti-impeller of final stage; 8, back blades; 9, annular housing; 10, sleeve; 11, inner stopper; 12, seal ring; 13, mounting groove; 14, pressing plate; 15, motor; 16, rigid coupling parts; 17, first stage impeller; 18, impeller; 19, fastening piece; 20, honeycomb duct.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As shown in Figures 2 to 4, vertical self-balanced multiple-stage centrifugal pump of the present utility model, comprise the pump shaft 1 of vertical installation, on pump shaft 1, be provided with successively from the bottom to top a suction casing 2, multiple the first stage casing 3, Spit Section 4, multiple the second stage casing 5 and a secondary suction casing 6, the interior impeller that is all equiped with in each the first stage casing 3, each the second stage casing 5 is interior is all equiped with anti-impeller.When work, pumped medium enters first stage impeller 17(near the impeller in the first stage casing 3 of suction casing 2 after being sucked by the suction port of suction casing 2), again after several grades of impeller works done from impeller 18(near the impeller in the first stage casing 3 of Spit Section 4) outlet discharge, then enter secondary suction casing 6 through the connecting passage (being annular housing 9) that is communicated with the outlet of impeller 18 and the entrance of secondary suction casing 6, enter the anti-impeller of chopped-off head (near the anti-impeller in the second stage casing 5 of secondary suction casing 6) from the outlet of secondary suction casing 6 again, after several grades of anti-impeller works done from the anti-impeller 7(of final stage near the anti-impeller in the second stage casing 5 of Spit Section 4, also be the anti-impeller of afterbody of pumped medium process) outlet discharge, finally enter Spit Section 4 and discharge from the pump discharge flange of Spit Section 4.The anti-impeller 7 of above-mentioned final stage is provided with the back blades 8 that can drive pumped medium to rotate, and back blades 8 is positioned at the side of the anti-impeller 7 of final stage near Spit Section 4.As shown in Figure 6, back blades 8 is provided with multiple, and multiple back blades 8 are arranged on the back shroud of the anti-impeller 7 of final stage along circumferentially even interval, the curved rib shape of each back blades 8, can produce enough pressure and can effectively remove again the sand grain in pumped medium, and power consumption is low as far as possible.In the time that centrifugal pump moves, back blades 8 can drive pumped medium to rotate.
Than the horizontally-mounted self-balanced multiple-stage centrifugal pump of tradition, the vertical self-balanced multiple-stage centrifugal pump of the utility model adopts vertical installation, its floor space is little, cost of production is low, and pump shaft 1 do not exist the buckling phenomenon causing due to gravity, thereby operation is also more steady.In the time carrying high temperature media, there will not be the phenomenon that causes pump bending in horizontal pump because of the temperature difference of pump top and the bottom, thereby can save for the requisite warming-up device of horizontal pump and warming-up process, make priming of pump convenient, on the anti-impeller 7 of final stage, the back shroud of a side of close Spit Section 4 is provided with back blades 8, when pump operation, thereby back blades 8 rotates and drives pumped medium to rotate, produce the pressure of the pressure reduction opposite direction at the H two ends, gap between the anti-impeller 7 of final stage and impeller 18, this pressure energy is offset and is approximately equivalent to the pressure that one-level impeller produces, thereby reduce the pressure reduction at the H two ends, gap between the anti-impeller 7 of final stage and impeller 18, after this pressure reduction reduces, leakage rate reduces also in direct ratioly, reduce the leakage of pumped medium, also alleviated wearing and tearing (the medium minimizing of this gap H that flows through at H place, this gap, the solid particle that correspondingly enters this gap H also reduces), reach the energy efficiency of maintenance pump and the object of running stability of longer time, extend the working life of pump.Simultaneously, the solid particle comprising in pumped medium is thrown toward the external diameter direction of the anti-impeller 7 of final stage under the effect of centrifugal force, thereby reduce the solid particle quantity that enters the gap H between the anti-impeller 7 of final stage and impeller 18, the wearing and tearing that further alleviate this gap H; Spit Section 4 is positioned at the centre of pump, pump discharge flange on it is only located at common MODEL VERTICAL MULTISTAGE PUMP only about half of of pump the topmost part for pump discharge flange with respect to the height of pump attachment face, the active force of the rising pipe of pump significantly reduces the adverse effect of pump, is conducive to operating steadily of pump.
In the present embodiment, centrifugal pump is provided with the annular housing 9 of the shell in all the second stage casings 5 of parcel, and the outlet of impeller 18 is communicated with the entrance of secondary suction casing 6 by this annular housing 9.Specifically, dismountable sleeve 10 that is connected with between the shell of Spit Section 4 and the shell of secondary suction casing 6, forms annular housing 9 between sleeve 10 and the shell in all the second stage casings 5.One end of this annular housing 9 is communicated with the entrance of secondary suction casing 6, and the other end is communicated with the outlet of impeller 18 by the communicating passage being located on the shell of Spit Section 4.
On the shell of the shell of above-mentioned Spit Section 4 and secondary suction casing 6, be equipped with inner stopper 11, one end of sleeve 10 is inserted in the inner stopper 11 of Spit Section 4, the other end of sleeve 10 is inserted in the inner stopper 11 of secondary suction casing 6, forms the axial and radial location to sleeve 10.Between the shell of Spit Section 4 and sleeve 10 and between the shell of secondary suction casing 6 and sleeve 10, be all equiped with seal ring 12, as shown in Figure 5, specifically between the outer wall of sleeve 10 and the shell of Spit Section 4 and the shell of secondary suction casing 6, be provided with mounting groove 13, seal ring 12 is installed in mounting groove 13, the shell of Spit Section 4 or and the shell of secondary suction casing 6 on also by fastening piece 19(screw) be connected with pressing plate 14, this pressing plate 14 is pressed abd fixed on seal ring 12 in mounting groove 13, and pressing plate 14 can carry out dismounting, be convenient to install and change seal ring 12, overhaul also convenient.
Because annular housing 9 is wrapped in the outside of the shell in the second stage casing 5, the working pressure that can make the shell in the second stage casing 5 bear reduces about half, this is because pumped medium is from the outlet of impeller 18 enters into annular housing 9, in annular housing 9, there is the pressure that is about lift of pump half size, pressure-acting in annular housing 9, in the outside of the shell in the second stage casing 5, can be offset the pressure of 5 inside, part the second stage casing.For example, the maximum pressure of 5 inside, the second stage casing of close Spit Section 4 is about the pressure that lift of pump produces, after cancelling out each other with the pressure in annular housing 9, the suffered pressure of the shell in this second stage casing 5 is actual is about the half of the pressure that lift of pump produces.The wall thickness that can significantly reduce like this second stage casing 5, is conducive to save raw material, reduces and manufactures cost.In addition, than the existing self-balanced multiple-stage centrifugal pump that honeycomb duct 20 is connected to Spit Section 4 and secondary suction casing 6, interchangeability of the present utility model and can assembling performance better, process, assemble and keep in repair convenient, and the profile of centrifugal pump is more attractive in appearance, structure is also more simple compact, takes up room less.
In the present embodiment, multistage centrifugal pump also comprises motor 15, and motor 15 is connected with pump shaft 1 by rigid coupling parts 16, and the elastic coupling flexible coupling parts that adopt with respect to existing common MODEL VERTICAL MULTISTAGE PUMP, have advantages of that volume is little, lightweight, cost is low.
In the present embodiment, first stage impeller 17 is single stage single suction cantilever type impeller, can make necessary NPSH reduction, the efficiency of pump improve.
Most flow passage components and the horizontal pump of the vertical self-balanced multiple-stage centrifugal pump of the utility model are general.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is also not only confined to above-described embodiment.For those skilled in the art, do not departing from the improvement that obtains under the utility model technical conceive prerequisite and conversion also should be considered as protection domain of the present utility model.
Claims (9)
1. a vertical self-balanced multiple-stage centrifugal pump, the suction casing (2) that comprises pump shaft (1) and set gradually along described pump shaft (1), multiple the first stage casings (3), Spit Section (4), multiple the second stage casings (5) and secondary suction casing (6), in each first stage casing (3), be all equiped with impeller, in each the second stage casing (5), be all equiped with anti-impeller, it is characterized in that: be provided with the back blades (8) that can drive pumped medium to rotate near the anti-impeller of final stage (7) in second stage casing (5) of Spit Section (4), described back blades (8) is positioned at the side of the anti-impeller of described final stage (7) near described Spit Section (4).
2. vertical self-balanced multiple-stage centrifugal pump according to claim 1, is characterized in that: the curved rib shape of described back blades (8).
3. vertical self-balanced multiple-stage centrifugal pump according to claim 1, is characterized in that: the anti-impeller of described final stage (7) is upper along being circumferentially evenly provided with multiple back blades (8), and each back blades (8) one is connected on the back shroud of the anti-impeller of described final stage (7).
4. according to the vertical self-balanced multiple-stage centrifugal pump described in claim 1 or 2 or 3, it is characterized in that: described centrifugal pump is provided with the annular housing (9) of the shell in described multiple the second stage casings of parcel (5), be communicated with the entrance of described secondary suction casing (6) by described annular housing (9) near the outlet of the impeller (18) in first stage casing (3) of Spit Section (4).
5. vertical self-balanced multiple-stage centrifugal pump according to claim 4, it is characterized in that: dismountable sleeve (10) that is connected with between the shell of described Spit Section (4) and the shell of described secondary suction casing (6), forms described annular housing (9) between described sleeve (10) and the shell in multiple the second stage casing (5).
6. vertical self-balanced multiple-stage centrifugal pump according to claim 5, it is characterized in that: on the shell of the shell of described Spit Section (4) and secondary suction casing (6), be equipped with inner stopper (11), one end of described sleeve (10) is inserted in the inner stopper (11) of described Spit Section (4), the other end of described sleeve (10) is inserted in the inner stopper (11) of described secondary suction casing (6), between the shell of described Spit Section (4) and sleeve (10) and between the shell of described secondary suction casing (6) and sleeve (10), is all equiped with seal ring (12).
7. vertical self-balanced multiple-stage centrifugal pump according to claim 6, it is characterized in that: between the shell of the outer wall of described sleeve (10) and Spit Section (4) and the shell of secondary suction casing (6), be provided with mounting groove (13), described seal ring (12) is installed in mounting groove (13), the shell of described Spit Section (4) or and the shell of secondary suction casing (6) on be also connected with by fastening piece (19) pressing plate (14) that is fixed seal ring (12).
8. according to the vertical self-balanced multiple-stage centrifugal pump described in claim 1 or 2 or 3, it is characterized in that: described multistage centrifugal pump also comprises motor (15), described motor (15) is connected with described pump shaft (1) by rigid coupling parts (16).
9. according to the vertical self-balanced multiple-stage centrifugal pump described in claim 1 or 2 or 3, it is characterized in that: be single stage single suction cantilever type impeller near the first stage impeller (17) in first stage casing (3) of suction casing (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420328274.9U CN203906302U (en) | 2014-06-19 | 2014-06-19 | Vertical self-balancing multi-stage centrifugal pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420328274.9U CN203906302U (en) | 2014-06-19 | 2014-06-19 | Vertical self-balancing multi-stage centrifugal pump |
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| Publication Number | Publication Date |
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| CN203906302U true CN203906302U (en) | 2014-10-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420328274.9U Expired - Lifetime CN203906302U (en) | 2014-06-19 | 2014-06-19 | Vertical self-balancing multi-stage centrifugal pump |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033391A (en) * | 2014-06-19 | 2014-09-10 | 长沙中联泵业有限公司 | Vertical self-balancing multistage centrifugal pump |
| CN106567834A (en) * | 2016-10-31 | 2017-04-19 | 沈阳鼓风机集团股份有限公司 | Multistage pump medium pressing-out structure |
-
2014
- 2014-06-19 CN CN201420328274.9U patent/CN203906302U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104033391A (en) * | 2014-06-19 | 2014-09-10 | 长沙中联泵业有限公司 | Vertical self-balancing multistage centrifugal pump |
| CN106567834A (en) * | 2016-10-31 | 2017-04-19 | 沈阳鼓风机集团股份有限公司 | Multistage pump medium pressing-out structure |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20141029 |