WO2011132106A1 - Pompe centrifuge - Google Patents

Pompe centrifuge Download PDF

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Publication number
WO2011132106A1
WO2011132106A1 PCT/IB2011/051514 IB2011051514W WO2011132106A1 WO 2011132106 A1 WO2011132106 A1 WO 2011132106A1 IB 2011051514 W IB2011051514 W IB 2011051514W WO 2011132106 A1 WO2011132106 A1 WO 2011132106A1
Authority
WO
WIPO (PCT)
Prior art keywords
impeller
pump
impellers
suction
centrifugal pump
Prior art date
Application number
PCT/IB2011/051514
Other languages
English (en)
Inventor
Subramaniam Ponmudi Sulur
Kathirvel Murugan
Vimalathithan Koperun Cholan
Chandrasekar Lakshminarasimman
Muruganantham Gothandapani
Madhavan Srinivasan
Original Assignee
Subramaniam Ponmudi Sulur
Kathirvel Murugan
Vimalathithan Koperun Cholan
Chandrasekar Lakshminarasimman
Muruganantham Gothandapani
Madhavan Srinivasan
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Subramaniam Ponmudi Sulur, Kathirvel Murugan, Vimalathithan Koperun Cholan, Chandrasekar Lakshminarasimman, Muruganantham Gothandapani, Madhavan Srinivasan filed Critical Subramaniam Ponmudi Sulur
Publication of WO2011132106A1 publication Critical patent/WO2011132106A1/fr

Links

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
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F04D13/14—Combinations of two or more pumps the pumps being all of centrifugal type

Definitions

  • the present invention is related to fluid pumps.
  • the invention is related to centrifugal pumps used for pumping water or liquids of similar viscosity or indeed other fluids such as oils, mud slurries, and wet concrete.
  • a conventional centrifugal pump works with an electrical power driven motor connected to the pump on its driving end.
  • the non-driving end of a conventional pump typically has a cooling fan which is used for continuous cooling of the motor to avoid overheating of the motor in continuous application.
  • the driving end of the motor has an extended shaft which is connected to a impeller housing (also termed as pump housing) which houses an impeller which is either of a closed or an open type.
  • a impeller housing also termed as pump housing
  • the impeller housing is an integral part of the motor whereas in the non-monoblock arrangement, the impeller housing is separate and connected to the motor shaft by means of a coupling.
  • a monoblock type is generally meant for light duty application whereas for heavy and continuous duty, the non monoblock type is preferred.
  • a centrifugal pump is a rotodynamic pump that uses a rotating impeller to increase the pressure and flow rate of a fluid.
  • Centrifugal pumps are the most common type of pumps used to move liquids through a piping system. The fluid enters the pump impeller along or near the rotating axis and is accelerated by the impeller— flowing either radially outward or axially into a diffuser/volute chamber— from where it exits into the downstream piping system. Centrifugal pumps are typically used for large discharge through smaller heads at the upstream ends.
  • Losses of a typical centrifugal pump are internal and external type. Several types of internal losses are known including the hydraulic losses or blade losses by friction, leakage losses, friction losses ate the external walls of wheels. The external losses include sliding surface losses, air friction losses at the clutches, and energy consumption of directly propelled auxiliary machines. While it is known that several attempts have been made and continue to be made to minimise these losses, the percentage improvement by minimising these losses is small. There is therefore a need to provide an improved pump that will improve the output more than that obtained by improvement in the above mentioned aspects. Any continuously operating pumps are expensive to run and maintain. There's therefore a need to provide improved pumps that will be more economic to provide and maintain.
  • one of the objects of the present invention is to provide a centrifugal pump that is more economic to provide, operate, and maintain.
  • a further objective of the present invention is to provide a centrifugal pump that uses less resources per unit volume of the pumped fluid than the conventional pumps.
  • the present invention discloses an improved centrifugal pump that provides nearly double the output measured in terms of the volume of liquid pumped per unit time than a conventional pump of the same HP rating for a proportionately less increase in the power consumption.
  • the improved pump operates on a single motor and has two suction mouths and two delivery ports provided on the impeller housing. The improved pump sucks up the water to be pumped through the two suction mouths and is pumped out via the two outlet ports after passing through a novel arrangement of motor with a dual end shaft, impellers and impeller housings, cooling fans, bearings.
  • Figure 1 A view of the conventional pump Figure 2 - A view of the operational pump of the present invention Figure 2 A - An exploded view of the invention Figure 2B - The shaft of the present invention
  • FIG 3 An exploded view of the rotor and impeller assembly of the invention Figure 4 - Another exploded view of the invention Figure 5 - Impeller housings of the present invention placed side by side Figure 6 - Impellers of the present invention in a side view Figure 7 - Impellers of the present invention in front view Figure 8 - Different types of impellers List of parts:
  • Impeller housing or pump housing
  • the present invention comprises a modified centrifugal pump.
  • the conventional centrifugal pumps have a single motor, single suction port and a single delivery port.
  • a central shaft emerging from a rotor (the prime mover) drives the impeller that is enclosed in a housing.
  • a typical conventional pump has a single shaft that ends in the rotor motor. The other end of the shaft is connected to an impeller that rotates to create suction which draws water which when passed over an impeller is sent through the outlet or delivery port under pressure and at a velocity.
  • the shaft also drives the cooling fan.
  • the present invention comprises a modified centrifugal pump (1A) comprising a single motor (2) a single shaft (2A), and a first impeller (4A) and a second impeller (4B) which are respectively housed in a first and a second impeller housing (5A, 5B). All other parts that are necessary for working of a typical centrifugal pump are provided in a modified form as appropriate. This will be apparent from the forthcoming description.
  • the pump of the present invention has two suction ports (termed as a first suction port (3A) and a second suction port (3B)) and two delivery ports (termed as first delivery port (9 A) and a second delivery port (9B)) and a single motor (2).
  • the water taken in via two suction ports (3A, 3B) enters the volute or casing through the respective suction mouth (3C, 3D) of the respective impellers (4 A, 4B).
  • the impellers (4 A, 4B) which rotate with the help of the energy provided by an energy source such as an electric motor, throw out the water through the two delivery ports (9 A, 9B) that are provided on the impeller housings (5 A, 5B). In the process, the water has gained sufficient head to reach a certain height.
  • the pump of the present invention comprises what can be termed as 'two halves' which are preferably bilaterally symmetrical in the way which its several parts are arranged.
  • Figure 2A shows an exploded view of the present invention and the direction of rotation of the vanes (4E) and
  • Figure 2B shows the modified shaft of the present invention.
  • the shaft (2A) has been modified such that it is placed securely inside the motor (2) and either end of the shaft is modified such that impellers (4A, 4B) may be mounted on the ends in a manner known to a person skilled in the art.
  • impellers 4A, 4B
  • necessary parts required for making of a functional centrifugal pump such as, but not limited to, impellers, housing, bearings, cooling fans are provided at each end of the shaft to facilitate this.
  • FIG 3 shows the modified motor (2) used in the present invention. It can be seen that it comprises a single rotor but it has been modified such that the shaft (2A) extends out on either side of the motor.
  • One of the inventive features of the present invention is that, unlike the conventional pumps, impellers (4A, 4B) are provided at each end of the shaft (2A). This allows water to be sucked in on each end of the shaft (2A).
  • Another feature of the present invention is that the impellers are modified such that they rotate in the same direction as each other, as illustrated by directional arrows placed around the shaft axis in Figures 2A and 3.
  • the impellers (4A, 4B) of the present invention are designed and configured such that when viewed from any one side along the axis, both impellers rotate in the same direction.
  • the other impeller would be termed as a 'left hand' impeller.
  • FIG 4 shows a view of an impeller housing (5A) and a delivery port (9 A).
  • the relative arrangement of the impeller housings (5 A, 5B, placed side by side for illustration purpose), the delivery ports (9 A, 9B), and the impeller face plates (4D) mirror each other when placed side by side.
  • FIG. 6 show the modified impellers (4A, 4B) of the present invention, placed side by side for the purpose of illustration, and which are placed on either side of the shaft (2 A) such that the impeller hubs (4F) are placed on the that surface of the respective impellers (the face plate, see Figure 7) which allow water to be thrown out of the delivery ports (9 A, 9B) in the same direction when the impellers (4A, 4B) are placed in their respective places on either end of the shaft (2A).
  • Figure 8 shows some of the several impeller designs currently used for centrifugal pumps.
  • the impellers used in the invention may be modified from any of these or other similar impellers, modifications being those described in this document.
  • the hubs, the suction mouths, vane directions of the impellers of the present invention are so oriented and located as to facilitate entry and exit of water from both ends of the shaft.
  • the impellers suitable for the invention may be of radial-flow, axial- flow, or mixed-flow type. They may be closed or open, or semi-open or vortex type. Some of the conventional vanes are shown in Figure 8, which can be modified for use in the present invention in accordance with the guidelines provided earlier.
  • Impeller housings or casings suitable for the invention are typically of two types, namely volute and circular. Either type of casing may be used in the pump of the present invention. The impellers are fitted inside the casings. It is well known that a volute casing builds a higher head but have low capacity whereas the circular casings are used for low head and high capacity.
  • the casings can be designed either as solid casings or split casings. Solid casing implies a design in which the entire casing including the discharge nozzle is all contained in one casting or fabricated piece. A split casing implies two or more parts are fastened together. Pumps of virtually any capacity may be built using the disclosure made herein.
  • the capacity of the dual action pump disclosed herein depends on a number of factors such as the character of the processed liquid - its density and viscosity, pump size and its inlet and outlet sections, the impeller size and the rotational speed of the impeller, size and shape of cavities between the vanes, and the pump suction and discharge temperature and pressure conditions.
  • the design of impellers for the pump of the present invention follows the established methods of the impeller design. The benefits of the invention are best understood through an example.
  • the pump of the present invention consumes 13.58 units of electrical power (kW) to deliver the stated output (litres/hr) in comparison with the 9.70 units used by the conventional pump to deliver its stated output.
  • the power used per 1000 litres by the pump of the present invention is 0.159 kW compared with 0.192 units of electricity for each 1000 litres required by the existing pumps of comparable HP rating.
  • the time required for delivering a unit volume of liquid is substantially less with the pump of the present invention than the conventional pump (which takes 71 seconds to deliver 1000 litres of water).
  • the existing pump is more economical to manufacture as it uses a single rotor and a motor.
  • the pump of the present invention is useful with other fluids
  • the pump of the present invention is useful for pumping all types of fluids including oils, mud slurries, and wet concrete. It is apparent from the foregoing description that the present invention comprises the following embodiments:
  • a single rotor motor provided with a shaft, wherein ends of said shaft emerge out of said motor on either side of said motor, a set of two impellers, namely a first impeller and a second impeller, provided inside respective impeller housings, namely a first impeller housing and a second impeller housing; said respective housings carrying said respective impellers are mounted on respective ends of said shaft,
  • two suction ports namely a first suction port and a second suction port, provided on the impeller housing corresponding to said two impellers, such that fluid to be pumped is sucked in through respective suction ports and enters the respective impeller housings through respective suction mouths of said impellers
  • two delivery ports namely a first delivery port and a second delivery port, provided corresponding to said two impeller housings, wherein upon operation of said pump, fluid sucked through suction ports enters said respective impeller housings through said impeller eyes and exits from said respective delivery ports.
  • a centrifugal pump as claimed in claim 1 wherein the curvatures of the vanes of said impellers are configured in a manner that the fluid that enters the impeller housings through respective suction mouths is released out of delivery ports.
  • a centrifugal pump as described in embodiments 1 -2 characterized in that said first impeller and said second impeller may be selected from any of radial-flow, axial-flow, or mixed-flow types.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention porte sur une pompe centrifuge améliorée, laquelle pompe assure quasiment le double du rendement, mesurée vis-à-vis du volume de liquide pompé par temps unitaire, d'une pompe classique ayant le même service nominal à haute pression pour une augmentation proportionnellement moindre de la consommation d'énergie. La pompe améliorée fonctionne avec un moteur unique, et a deux embouchures d'aspiration et deux orifices de refoulement disposés sur le boîtier d'hélices. La pompe améliorée aspire l'eau devant être pompée par l'intermédiaire des deux embouchures d'aspiration et celle-ci est pompée vers l'extérieur par l'intermédiaire des deux orifices de sortie après avoir traversé un nouvel agencement de moteur avec un arbre à double extrémité, des hélices et des boîtiers d'hélices, des ventilateurs de refroidissement, et des paliers.
PCT/IB2011/051514 2010-04-22 2011-04-08 Pompe centrifuge WO2011132106A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IN383MU2010 2010-04-22
IN383/MUM/2010 2010-04-22

Publications (1)

Publication Number Publication Date
WO2011132106A1 true WO2011132106A1 (fr) 2011-10-27

Family

ID=44120248

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB2011/051514 WO2011132106A1 (fr) 2010-04-22 2011-04-08 Pompe centrifuge

Country Status (1)

Country Link
WO (1) WO2011132106A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104653474A (zh) * 2015-03-17 2015-05-27 浙江创美机电有限公司 一种对称高速双吸泵
WO2016128802A1 (fr) * 2015-02-11 2016-08-18 Sulur Subramaniam Vanagamudi Pompe centrifuge dotée de deux rotors en porte-à-faux et d'un moteur refroidi au moyen de deux ventilateurs agencés en série
CN107939698A (zh) * 2017-11-30 2018-04-20 衢州学院 一种新结构多功能复合泵送装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700343A (en) * 1950-05-11 1955-01-25 Jr Albert R Pezzillo Motor pump unit
FR2732412A1 (fr) * 1995-03-31 1996-10-04 Technicatome Dispositif de pompage a moteur axial
FR2776262A1 (fr) * 1998-03-17 1999-09-24 Technicatome Propulseur naval a moteur central et deux jets hydrauliques
EP1124062A2 (fr) * 2000-02-08 2001-08-16 Toshiba Tec Kabushiki Kaisha Pompe axiale à entraínement électrique

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700343A (en) * 1950-05-11 1955-01-25 Jr Albert R Pezzillo Motor pump unit
FR2732412A1 (fr) * 1995-03-31 1996-10-04 Technicatome Dispositif de pompage a moteur axial
FR2776262A1 (fr) * 1998-03-17 1999-09-24 Technicatome Propulseur naval a moteur central et deux jets hydrauliques
EP1124062A2 (fr) * 2000-02-08 2001-08-16 Toshiba Tec Kabushiki Kaisha Pompe axiale à entraínement électrique

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016128802A1 (fr) * 2015-02-11 2016-08-18 Sulur Subramaniam Vanagamudi Pompe centrifuge dotée de deux rotors en porte-à-faux et d'un moteur refroidi au moyen de deux ventilateurs agencés en série
CN104653474A (zh) * 2015-03-17 2015-05-27 浙江创美机电有限公司 一种对称高速双吸泵
CN107939698A (zh) * 2017-11-30 2018-04-20 衢州学院 一种新结构多功能复合泵送装置

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