CN1018943B - Single-suction opposed multi-stage centrifugal submersible pump - Google Patents
Single-suction opposed multi-stage centrifugal submersible pumpInfo
- Publication number
- CN1018943B CN1018943B CN 91102186 CN91102186A CN1018943B CN 1018943 B CN1018943 B CN 1018943B CN 91102186 CN91102186 CN 91102186 CN 91102186 A CN91102186 A CN 91102186A CN 1018943 B CN1018943 B CN 1018943B
- Authority
- CN
- China
- Prior art keywords
- pump
- stator
- impeller
- inlet segment
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention belongs to the field of the design and the manufacture of water pumps, is suitable for lifting water from a well with small diameter and high lift, and solves the difficult problems of large radius and poor balance capability of a high-lift submersible pump in the prior art. The present invention is mainly characterized in that the middle section of a pump body is used for sucking water; an upper impeller, a lower impeller and a guide blade are arranged in opposite; a flow guiding chamber, a suction-in chamber, a discharge chamber and a pressure balance chamber are arranged in the pump body. Compared with the water pumps of the prior art, the present invention is capable of automatically balancing axial force and reducing sealing pressure between the stage ends of a water pump, and has the advantages of compact structure, high reliability, long service life, etc. The present invention develops a new technical field for the structural design of the high-lift submersible pump.
Description
The present invention relates to the opposed multistage centrifugal submersible pump of a kind of single suction, be applicable to high-lift, the well water lift of minor diameter.
Boring at present the deep-well beaten limits owing to power and equipment, the deep-well footpath is more little more in drilling well, existing high-lift submersible pump is because of axial force is too big, makes thrust-bearing bearing capacity deficiency, because water pump progression increases, unit is elongated, water pump spindle rigidity is poor, makes the wearing and tearing and the leakage aggravation of equalizing orifice device to cause axial force balance to weaken, the acceleration thrust-bearing damages, and when serious water pump can't be worked.
Japan Patent JP5587888 discloses a kind of " the closed electric pump of vertical multi-stage ", this pump intake is in the water pump lower end, exhaust port is at the middle part of the pump housing, make that going up stator has formed complicated hyperbaric chamber and low-pressure cavity, this design forces the water pump external diameter to increase, only be applicable to the place that installing space is bigger, can't be at small-well-diameter, high-lift deep-well uses.
The objective of the invention is at the deficiencies in the prior art, by the suction of pump housing middle part, with multi-stage impeller and the corresponding multistage opposed installation of hour wheel of leading, can automatically balancing axial force, liquid chunnel is reasonable, and external diameter is little, is applicable to the single suction opposed type multistage centrifugal submersible pump that small-well-diameter is high-lift.
The present invention is achieved in that single suction opposed type multistage centrifugal submersible pump is made up of coupling, connecting section, impeller, stator, pump shaft, pump case, inlet segment, hypomere, stage casing, epimere, check valve.The pump housing is by water sucting cavity and discharge side, upper and lower pump case is formed, discharge side places the upper end of the pump housing, check valve is arranged in the discharge side, multistage upper and lower impeller is fixed on the pump shaft in opposed mode, corresponding multistage upward stator, following stator are separately fixed in the upper and lower pump case in overlapping mode, it is characterized in that:
(1) inlet segment is arranged on the middle part of the pump housing, and water sucting cavity and drain chamber are located in the inlet segment.
(2) diversion cavity that communicates with the drain chamber of inlet segment is made up of the outer wall of hypomere, following pump case and following stator.
(3) by the stage casing, the lower end of going up the pressure balance chamber that the outer wall of pump case, epimere and last stator forms communicates with drain chamber, upper end closed, the lower end, stage casing connects with inlet segment, inlet segment connects with last pump case by screw thread.When pump working, liquid is sucked by the water sucting cavity of inlet segment, and the liquid stream that impeller, following stator boost step by step under the process flows into diversion cavity by hypomere, and the drain chamber by inlet segment enters the stage casing again.Represent that with F the upper and lower impeller of water pump produces the summation of the absolute value of axial force, the pressure maximum that the P express liquid reaches at the pump discharge side, this moment is the impeller maximum that will the produce 1/2F axial force that makes progress down, partially liq enters pressure balance chamber simultaneously, pressure is 1/2P in the chamber, the liquid that is entered by the stage casing continues to enter to be gone up impeller, goes up stator and make the liquid secondary back of boosting step by step arrive discharge side, and this moment, fluid pressure was P, and the discharge side that liquid is formed through epimere, check valve is discharged.At this moment, last impeller produces the maximum axial force downwards of 1/2F, and the maximum of the 1/2F that produces with the impeller down axial force balance that makes progress reaches the purpose of automatically balancing axial force, and water pump enters normal operating condition.The pump working chopped-off head of impeller at present is 0～1/2P to the fluid pressure of final stage, the chopped-off head of last impeller is 1/2P～P to the fluid pressure of final stage, the fluid pressure of pressure balance chamber is 1/2P, thereby the sealing load of upper and lower each sections of stator of water pump is 0～1/2P, thereby the sealing load of water pump has reduced half.
The water sucting cavity of inlet segment of the present invention and drain chamber cross-distribution, spaced-apart, its lower end links by seam and following stator, and connects with following pump case by screw thread, the upper end links with stage casing and last pump, and this design makes the pump housing form the reasonable flow channel layout.
The last impeller of the opposed installation of the present invention, following impeller and to go up the blade rotation direction of stator, time stator accordingly opposite, stator can use the radial stator and the space formula stator of existing product.
Diversion cavity of the present invention is located at the lower end of the pump housing, and its effect is that the pump liquid conductance of discharging goes into to go up Pump Suction Nozzle down.Diversion cavity is made up of the outer wall of hypomere, following pump case, following stator, and the upper end of hypomere is connected with following stator by seam, and is connected with following pump case by screw thread.Compared with prior art, simplify the labyrinth of stator hyperbaric chamber, low-pressure cavity, dwindled the external diameter of water pump.
Pressure balance chamber of the present invention is made up of the outer wall of stage casing, last pump case, epimere and following stator.The lower end of pressure balance chamber communicates with drain chamber by the stage casing, and this pressure balanced upper end closed has on the balance function of sealing load between each section of stator.
Description of drawings:
Accompanying drawing 1 is a single suction opposed type multistage centrifugal submersible pump structure principle chart
Accompanying drawing 2 is the A-A sectional view of Fig. 1
With reference to the accompanying drawings embodiment is further described: single suction opposed type multistage centrifugal submersible pump is by coupling 1, connecting section 2, last impeller 10, following impeller 6, last stator 11, following stator 5, pump shaft 7, inlet segment 8, hypomere 3, stage casing 9, epimere 13, last pump case 12, following pump case 4, check valve 14 is formed, be provided with water sucting cavity 15, the inlet segment 8 of drain chamber 16 is contained in the middle part of the pump housing, the multistage impeller 10 of going up, following impeller 6 is fixed on the pump shaft 7 in opposed mode, the corresponding multistage stator 11 of going up, following stator 5 is fixed on charging pump shell 12 in overlapping mode respectively, in the following pump case 4.Hypomere 3 with guide vane is located at down the final stage outlet port of stator 5, stage casing 9 with supporting blade is located at the chopped-off head ingress of stator 11, outer wall by the pump housing 3, following pump case 4 and following stator 5 is formed diversion cavity 17, outer wall by stage casing 9, last pump case 12, epimere 13 and last stator 11 is formed the pressure balance chamber 18 of the pump housing, discharge side 19 is made up of epimere 13 and check valve 14, and coupling 1 and connecting section 1 will connect with supporting motor.Liquid is sucked by the water sucting cavity 15 of the inlet segment 8 that is located at pump housing middle part, through impeller 6, following stator 5 flow into diversion cavity 17 after boosting step by step down, drain chamber 16 by inlet segment 8 enters stage casing 9 again, this moment is impeller 6 maximum that will the produce 1/2F axial force that makes progress down, partially liq enters pressure balance chamber 18 simultaneously, pressure is 1/2P in the chamber, the liquid that is entered by stage casing 9 continues to enter to be gone up impeller 10, goes up stator 11 the liquid secondary is boosted step by step, and the discharge side 19 that liquid is formed through epimere 13, check valve 14 when arriving discharge side 19 is discharged.Impeller 10 produces the maximum axial force downwards of 1/2F on this moment, the maximum of the 1/2F that produces with the impeller 6 down axial force balance that makes progress, and water pump enters normal operating condition.During pump working, the chopped-off head of following impeller 6 is 0～1/2P to the fluid pressure of final stage, the chopped-off head of last impeller 10 is 1/2P～P to the fluid pressure of final stage, the fluid pressure of pressure balance chamber 18 is 1/2P, so the sealing load of stator 11, following stator 5 each sections is 0～1/2P on the water pump, thereby makes the sealing load of water pump reduce half.
The present invention compared with prior art has the following advantages:
1, can automatically balancing axial force; 2, liquid is sucked by pump housing middle part, sucks than water pump lower end that flow process is short, guide vane structure is simplified, external diameter is little; 3, reduce the sealing load of each sections of guide vane of water pump, alleviated construction weight, improved reliability; 4, save the multi-stage pump axial force balanced controls, can make designs simplification, be specially adapted to the high-lift water lift of small-well-diameter.
Claims (3)
1, a kind of single suction opposed type multistage centrifugal submersible pump, comprise the pump housing of forming by water sucting cavity 15 and discharge side 19, upper and lower pump case, discharge side 19 places upper end, the check valve 14 of the pump housing to be arranged in the discharge side 19, multistage impeller 10,6 up and down is fixed on the pump shaft 7 in opposed mode, corresponding multistage upward stator 11, following stator 5 are separately fixed in the water pump shell 12,4 in overlapping mode, it is characterized in that:
(1) inlet segment 8 is arranged on the middle part of the pump housing, and water sucting cavity 15 and drain chamber 16 are located in the inlet segment 8.
(2) diversion cavity 1 that communicates with the drain chamber 16 of inlet segment 8 is made up of the outer wall of hypomere 3, following pump case 4 and following stator 5.
(3) by stage casing 9, the lower end of going up the pressure balance chamber 18 that the outer wall of pump case 12, epimere 13 and last stator 11 forms communicates with drain chamber 16, upper end closed, 9 lower ends, stage casing connect with inlet segment 8, inlet segment 8 connects with last pump case 12 by screw thread.
2, submersible pump according to claim 1 is characterized in that the water sucting cavity 15 of inlet segment 8, and drain chamber 16 cross-distribution are spaced-apart.
3, submersible pump according to claim 1 is characterized in that the blade rotation direction of the last impeller 10 of opposed installation, following impeller 6 and last stator 11, following stator 5 is opposite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91102186 CN1018943B (en) | 1991-04-05 | 1991-04-05 | Single-suction opposed multi-stage centrifugal submersible pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91102186 CN1018943B (en) | 1991-04-05 | 1991-04-05 | Single-suction opposed multi-stage centrifugal submersible pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1055413A CN1055413A (en) | 1991-10-16 |
| CN1018943B true CN1018943B (en) | 1992-11-04 |
Family
ID=4905461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91102186 Expired CN1018943B (en) | 1991-04-05 | 1991-04-05 | Single-suction opposed multi-stage centrifugal submersible pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1018943B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19736678A1 (en) * | 1997-08-22 | 1999-02-25 | Rietschle Werner Gmbh & Co Kg | Multistep side channel pump for compressing media |
| CN1082151C (en) * | 1998-12-22 | 2002-04-03 | 王宝利 | Self-balanced thrust blade wheel for centrifugal pump |
| CN102705262B (en) * | 2012-04-26 | 2015-08-12 | 山东星源矿山设备集团有限公司 | A kind of multistage high-lift single single suction Submerged Motor Pumps of impeller three flow direction structure configuration |
| CN103307014B (en) * | 2013-07-15 | 2016-07-06 | 李维熙 | A kind of single suction self-balanced multiple-stage water pump |
| CN103511287A (en) * | 2013-10-23 | 2014-01-15 | 大连深蓝泵业有限公司 | Horizontal-type radial subdivision volute-type dual-cylinder pump |
-
1991
- 1991-04-05 CN CN 91102186 patent/CN1018943B/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| CN1055413A (en) | 1991-10-16 |
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Legal Events
| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C13 | Decision | ||
| GR02 | Examined patent application | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |