WO2014044422A1 - Pump device - Google Patents
Pump device Download PDFInfo
- Publication number
- WO2014044422A1 WO2014044422A1 PCT/EP2013/061204 EP2013061204W WO2014044422A1 WO 2014044422 A1 WO2014044422 A1 WO 2014044422A1 EP 2013061204 W EP2013061204 W EP 2013061204W WO 2014044422 A1 WO2014044422 A1 WO 2014044422A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pump device
- elastic portion
- pump
- pipe
- guide tube
- Prior art date
Links
- 239000012530 fluid Substances 0.000 claims description 6
- 229920001971 elastomer Polymers 0.000 claims description 5
- 239000005060 rubber Substances 0.000 claims description 4
- 238000004026 adhesive bonding Methods 0.000 claims description 3
- 229920002943 EPDM rubber Polymers 0.000 claims description 2
- 244000043261 Hevea brasiliensis Species 0.000 claims description 2
- 239000005062 Polybutadiene Substances 0.000 claims description 2
- 229920003052 natural elastomer Polymers 0.000 claims description 2
- 229920001194 natural rubber Polymers 0.000 claims description 2
- 229920002857 polybutadiene Polymers 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 18
- 230000003247 decreasing effect Effects 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 238000005094 computer simulation Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000136 polysorbate Polymers 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000009420 retrofitting Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/086—Sealings especially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/566—Fluid-guiding means, e.g. diffusers adjustable specially adapted for liquid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/028—Layout of fluid flow through the stages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
- F04D25/0686—Units comprising pumps and their driving means the pump being electrically driven specially adapted for submerged use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
Definitions
- the invention relates to a pump device according to the preamble of claim 1 and a pump system.
- Axial flow or mixed flow pumps are typically used where large amounts of water have to be moved, for example for removing water from flooded areas. These pumps may be equipped with motors with a power range from 10 kW to 1 MW and usually are placed inside a pipe or column pipe such that the pipe coaxially surrounds the pump.
- the column pipe in particular extends in vertical direction.
- At one end of the pipe the pump sucks water in, and at the other end of the pipe the water is pumped out with a throughput lying in the range from 5 m 3 /min to 700 m 3 /min and at lifting height between 2 meters and 9 meters.
- a typical throughput may be 180 m 3 /min at a lifting height of 3 meters using an electrical pump with 140 kW power.
- a pump device to be mounted coaxially in a pipe in particular a column pipe, the pump device comprising an axial or mixed flow pump with a volute or guide channel or guide tube, respectively, arranged around a propeller portion of the pump device and preferably being conically widened ⁇ o- wards an outlet portion or outlet end of the guide tube and of the pump, wherein, in mounting position, a gap may be formed between an outlet end of the guide tube and the surrounding pipe.
- the outlet end of the guide tube is the upper end.
- the guide tube has an elastic portion at its outlet end, which elastic portion is bendable in radial direction relative to the longitudinal axis, i. e. the rotational axis of the pump device. This means the elastic portion is bendable towards the pipe in order to at least partially, in particular completely, close the gap during operation of the pump device.
- the outlet end of the volute or guide tube is made elastic and bendable towards the inner wall of the pipe.
- the elastic portion is bendable by a hydraulic pressure of a fluid being pumped to the outlet portion or outlet end.
- the elastic portion is bendable against an inner wall of a surrounding pipe when the pump placed inside the pipe is running.
- it is a design option how far the elastic portion is deflected in radial direction and towards the inner wall or if it even is fully deflected so as to contact the inner wall and close the gap completely.
- full clo- sure gives the best effect, it is not needed in order to obtain a reduction in the turbulent flow.
- a gap size of, for example, 10 to 20 mm between the expanded elastic portion and the inner wall of the pipe will still be able to reduce the turbulence of the flow.
- a pump with a maximum pressure of 1 bar (relative to the input pressure) in the column pipe may comprise an elastic portion being designed to fully deflect at 0.2 bar. According ⁇ o ye ⁇ a further preferred em bodiment the elastic portion also is expandable.
- the elastic portion is formed by a rubber ring mounted at an outlet end of the volute or guide tube, respectively.
- the elastic ring is preferably mounted on the axial edge of the pum p guide tube and is bendable and preferably expandable. With this configuration, the turbulent flow is transformed into laminar flow because the ring prevents a sudden change in diameter.
- the elastic portion is bendable at a hydraulic pressure of at least 0.2 bar. Specifically, during no flow or low flow through the pum p, the elastic portion will not deform, because the hydraulic forces are low. But during higher flow and higher pressure, as for exam- pie above 0.2 bar, or preferably between 0.5 and 5 bars, the ring will bend radially outwards due to a radial hydraulic force component from the pum ped fluid. This force component will press the elastic portion towards the inner wall of the column. Hereby, the gap is closed, and turbulence is prevented.
- the walls or columns of the pipe are preferably made of steel, plastic, or concrete.
- the pipe has a di- ameter between 300 mm and 2500 mm, preferably between 500 mm to 2200 mm and the pump is dimensioned that it fits into such pipe.
- the diameter of the pump device may be adapted to a certain pipe diameter or to a range of pipe diameters.
- the dimension of the elastic portion depends on the specific diameter of the column pipe.
- fhe elastic portion has a height such that when fhe pump placed in a pipe is running it is able ⁇ o contact the inner wall of fhe surrounding pipe.
- fhe elastic portion is made of an elastomer, for example rubber, in particular, of nifrile butadiene rubber or ethylene propylene diene monomer rubber or natural rubber due ⁇ o their good abrasive properties.
- rubber in particular, of nifrile butadiene rubber or ethylene propylene diene monomer rubber or natural rubber due ⁇ o their good abrasive properties.
- other materials may be used as long as fhey are elastic and bendable and are able ⁇ o withstand thousands of bendings over a period of time.
- the elastic portion may preferably have a Shore A hardness in fhe range of 40 ⁇ o 90 so as ⁇ o have fhe right coefficient of expansion.
- fhe elastic portion has a first axial end adjacent ⁇ o fhe guide tube and an opposed second axial end, wherein the thickness of fhe elastic portion af the upper end is lower than at fhe lower end.
- the first axial end is the up- per end and fhe second axial end is fhe lower end.
- fhe inner surface of fhe elastic portion follows fhe surface trajectory (the guide tube angle) of fhe guide tube.
- fhe elastic portion is connected to fhe guide tube by gluing or by a mechanical connec- tion, in particular, by screws or bolts.
- a further connection between the guide tube and the elastic portion may be ⁇ o vulcanize fhe rubber directly onto fhe guide tube. I ⁇ may also be advantageous if the elastic portion has two parts, in particular two halves, each having the shape of half ring.
- the elastic portion may be one fully continuous ring. Typically, the ring will be mounted on a new pump from the factory, but retrofitting on old pumps may also be possible.
- a pump system comprising a pump device as outlined above and a surrounding pipe is provided, the pump device being mounted coaxially in the pipe, in particular the column pipe.
- Fig. 1 is a side view of a pump system according to an embodiment of the invention
- Fig. 2 is a sectional view of a detail of the pump system shown in
- Fig. 3A - 3D are illustrations of several flow situations with and without an elastic portion on the guide tube.
- the pump system 1 comprises a pump device 2, which in this case is a submersible axial flow pump which is arranged in the center of a pipe in form of a column pipe 3. Specifically, the longitudinal axis 4 of the pump device 2 is arranged coaxially to the longitudinal axis of the pipe, in this case the column pipe 3.
- An axial flow pump in the meaning of the invention is a pump which propeller produces an axial flow.
- the invention may also be carried out with a mixed flow pump which uses an impeller which a ⁇ least partly produces a radial flow which is deflected in axial direction by the surrounding volute or guide channel or guide tube, respectively.
- the mixed flow pump is a combination or compromise between a radial and an axial flow pump.
- the pump de- vice 2 comprises an inlet portion 5 at its first axial end, in this case the lower end at which water enters the pump.
- a propeller portion with diffuser vanes and an axial propeller is arranged inside the pump housing 6 .
- the pump device 2 comprises a volute or guide tube 7 which conically widens towards an outlet portion 8 of the pump device 2.
- an electrical motor 10 is provided which may be connected to electricity via the electrical power supply cables 9, 9'.
- the guide tube 7 at its outlet end, in this case at its upper end at the outlet portion 8 of the pump device 2 is provided with an elastic portion 12. As can be seen particularly well in the portion surrounded by a circle on the left side of the drawing, there is a gap 1 1 between the elastic portion 12 and the inner wall 13 of the column pipe 3.
- Fig. 2 is a sectional view of a detail of the pump system 1 shown in Fig. 1 , specifically, illustrating the connection area between the guide tube 7 and the elastic portion 12.
- the guide tube 7 and the elastic portion 12 are connected to each other by gluing together two overlapping parts 14, 14' of the guide tube 7 and the elastic portion 12.
- the elastic portion 12 has a first axial end, the lower end 15 which is directly adjacent to and overlapping an upper end 1 6 of the guide tube 7, the thickness of which is higher than at an axial sec- ond end, the upper portion 1 7 of the elastic portion 12.
- the inner surface 18 of the elastic portion 12 follows the surface trajectory of the guide tube 7 and, thus, will not disturb the flow of fluid or water during operation of the pump device 2 when the flow is low and there is only low or no deflection of the elastic portion 12.
- FIG. 3A to 3D are four illustrations showing several flow situations with and without an elastic portion 12 on the guide tube 7.
- Fig. 3A shows a pump system 1 with a pump device 2 not according to the invention and having a guide tube 7 without an elastic portion 12 which is located within a column pipe 3.
- the pump device 2 is not operated and there is no flow of water at all.
- Fig. 3B the same pump device 2 shown in Fig. 3A now is in operation where water is pumped by rotation of the diffuser vanes 20 from an inlet portion 5 to an outlet portion 8.
- the turbulences 18 will occur.
- Fig. 3A shows a pump system 1 with a pump device 2 not according to the invention and having a guide tube 7 without an elastic portion 12 which is located within a column pipe 3.
- the pump device 2 is not operated and there is no flow of water at all.
- Fig. 3B the same pump device 2 shown in Fig. 3A now is in operation where water is pumped by rotation of the diffuser vanes 20 from an in
- FIG. 3C another pump system 1 is shown which differs from the one shown in Fig. 3A in that according to the invention an elastic portion 12 is provided at an upper end 16 of the guide tube 7.
- an elastic portion 12 is provided at an upper end 16 of the guide tube 7.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/429,038 US20150233383A1 (en) | 2012-09-18 | 2013-05-30 | Pump device |
CN201380001163.5A CN103930682B (en) | 2012-09-18 | 2013-05-30 | Pump installation |
RU2015114137/06A RU2597382C1 (en) | 2012-09-18 | 2013-05-30 | Pumping device |
KR1020137021271A KR101727655B1 (en) | 2012-09-18 | 2013-05-30 | Pump device |
EP13725717.6A EP2898220B1 (en) | 2012-09-18 | 2013-05-30 | Pump device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12184888 | 2012-09-18 | ||
EP12184888.1 | 2012-09-18 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014044422A1 true WO2014044422A1 (en) | 2014-03-27 |
Family
ID=46970032
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2013/061204 WO2014044422A1 (en) | 2012-09-18 | 2013-05-30 | Pump device |
Country Status (6)
Country | Link |
---|---|
US (1) | US20150233383A1 (en) |
EP (1) | EP2898220B1 (en) |
KR (1) | KR101727655B1 (en) |
CN (1) | CN103930682B (en) |
RU (1) | RU2597382C1 (en) |
WO (1) | WO2014044422A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113107855B (en) * | 2021-04-25 | 2022-12-30 | 济宁安泰矿山设备制造有限公司 | Radial clearance adjusting structure and method and emergency drainage pump |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1578843A (en) * | 1919-07-03 | 1926-03-30 | Moody Leweis Ferry | Pump and method of regulating the same |
FR1121319A (en) * | 1955-03-24 | 1956-08-08 | Elektr App Spring Fab | Motor pump inserted in a pipe |
EP2378127A2 (en) * | 2010-04-16 | 2011-10-19 | KSB Aktiengesellschaft | Flow guiding component with pump and fitting |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1398450A (en) * | 1920-06-24 | 1921-11-29 | Tinney James Robert | Pump |
SU477259A1 (en) * | 1970-07-15 | 1975-07-15 | Грузинский Научно-Исследовательский Институт Гидротехники И Мелиорации | Device for adjusting the radial clearance |
US4094613A (en) * | 1976-05-07 | 1978-06-13 | Sundstrand Corporation | Variable output centrifugal pump |
US4976446A (en) * | 1988-07-21 | 1990-12-11 | Westinghouse Electric Corp. | Reactor coolant pump auxiliary seal for reactor coolant system vacuum degasification |
JPH08226397A (en) * | 1995-02-20 | 1996-09-03 | Mitsubishi Heavy Ind Ltd | Device for reducing shaft power of mixed flow pump or axial flow pump |
JP2001012780A (en) * | 1999-06-28 | 2001-01-19 | Matsushita Electric Ind Co Ltd | Tunnel ventilation fan |
JP2001355592A (en) * | 2000-06-12 | 2001-12-26 | Mitsubishi Heavy Ind Ltd | Mixed flow pump of high specific speed |
JP5311675B2 (en) * | 2010-01-22 | 2013-10-09 | 日本ピラー工業株式会社 | Seal for submersible pump |
KR101006925B1 (en) * | 2010-10-14 | 2011-01-10 | (주)대한중전기 | A apparatus for sludge removing of pump |
-
2013
- 2013-05-30 WO PCT/EP2013/061204 patent/WO2014044422A1/en active Application Filing
- 2013-05-30 RU RU2015114137/06A patent/RU2597382C1/en active
- 2013-05-30 KR KR1020137021271A patent/KR101727655B1/en active IP Right Grant
- 2013-05-30 EP EP13725717.6A patent/EP2898220B1/en active Active
- 2013-05-30 CN CN201380001163.5A patent/CN103930682B/en active Active
- 2013-05-30 US US14/429,038 patent/US20150233383A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1578843A (en) * | 1919-07-03 | 1926-03-30 | Moody Leweis Ferry | Pump and method of regulating the same |
FR1121319A (en) * | 1955-03-24 | 1956-08-08 | Elektr App Spring Fab | Motor pump inserted in a pipe |
EP2378127A2 (en) * | 2010-04-16 | 2011-10-19 | KSB Aktiengesellschaft | Flow guiding component with pump and fitting |
Also Published As
Publication number | Publication date |
---|---|
KR20150032144A (en) | 2015-03-25 |
CN103930682A (en) | 2014-07-16 |
KR101727655B1 (en) | 2017-05-02 |
CN103930682B (en) | 2016-08-17 |
EP2898220A1 (en) | 2015-07-29 |
EP2898220B1 (en) | 2016-11-30 |
RU2597382C1 (en) | 2016-09-10 |
US20150233383A1 (en) | 2015-08-20 |
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