WO2007147380A1 - Pompe axiale - Google Patents

Pompe axiale Download PDF

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Publication number
WO2007147380A1
WO2007147380A1 PCT/DE2007/000988 DE2007000988W WO2007147380A1 WO 2007147380 A1 WO2007147380 A1 WO 2007147380A1 DE 2007000988 W DE2007000988 W DE 2007000988W WO 2007147380 A1 WO2007147380 A1 WO 2007147380A1
Authority
WO
WIPO (PCT)
Prior art keywords
screw propeller
impeller
pump
propeller
speed
Prior art date
Application number
PCT/DE2007/000988
Other languages
German (de)
English (en)
Inventor
Stephan Näckel
Pawel Piotrowski
Original Assignee
Friatec Aktiengesellschaft
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 Friatec Aktiengesellschaft filed Critical Friatec Aktiengesellschaft
Publication of WO2007147380A1 publication Critical patent/WO2007147380A1/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
    • F04D3/00—Axial-flow pumps
    • F04D3/005—Axial-flow pumps with a conventional single stage rotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D3/00—Axial-flow pumps

Definitions

  • the invention relates to an axial pump with an impeller for operating ranges at theoretical, specific speeds greater than 500.
  • n is the rated speed in l / min
  • Q opt is the flow rate in m 3 / s
  • H opt the head in m, both determined at the point of the greatest efficiency of the pump.
  • the specific speed n q is a characteristic of a particular pump size and determines usually the best efficiency of the optimal shape of the impeller.
  • a specific speed n q can be assigned not only certain impeller geometries, but also different operating characteristics, such as characteristic curve, efficiency, gap losses, suction and hydraulic forces.
  • the internal losses namely wheel friction and gap losses, increase.
  • the best efficiencies are achieved depending on the flow rate Q in a range between n q of 40 to 60 l / min.
  • an axial flow pump in such a way that it works even at low heads in the direction of high flow rates with the best possible efficiency without adverse operating characteristics.
  • an axial flow pump with the features of claim 1.
  • the impeller is a screw propeller impeller. This combines a centrifugal pump characteristic with a positive displacement pump characteristic.
  • the screw propeller impeller is advantageous from a purely volumetric point of view for a theoretical, maximum flow rate Qm ax , th according to the formula
  • n is the rated speed and V vo i is the geometric volume of the screw propeller rotor. Due to this volumetric design, any hydraulically meaningful, maximum delivery flow can thus be achieved, in principle, by choosing a defined geometry and rotational speed.
  • Figure 1 different wheel shapes for wheels optimized for each specific
  • Figure 2 is a qualitative representation of the pump characteristics for head H, power
  • Figure 3 is an exemplary representation of the characteristics of head H, the power
  • FIG. 4 shows views of a screw propeller impeller for an axial pump of the present invention.
  • Figure 5 is a sectional view of an axial pump with screw propeller wheel.
  • Centrifugal pumps are divided into groups according to their specific speed:
  • FIG. 2 shows in each case characteristic characteristic curves for the specific rotational speeds of the impeller designs from FIG. 1, with delivery head H, power P and efficiency ⁇ being plotted as a function of the delivery flow Q for each design. It can be seen that changes in accordance with the specific speed and the shape of the pump curve, the course, for example, the Q-H curve changes from flat characteristics for small specific speeds, ie radial wheels, in very steep courses for large specific speeds, ie propellers.
  • the Cordier Diagram would therefore ideally be a propeller pump size DN 800.
  • H 0 is the zero delivery height
  • ie the maximum achievable delivery head at Q O m 3 / h
  • u a is the peripheral speed of the screw propeller impeller on the outer diameter.
  • the zero pressure coefficient n 0 thus determines the steepness of the characteristic and thus the achievable delivery heights at delivery rates Q ⁇ Q max and is dependent on the design of the screw propeller impeller and the pump housing and is validated experimentally.
  • volumetric efficiency ⁇ v is determined experimentally. He satisfies the formula VV ßmax "" ßmax.r / i ' 7 Iv •
  • FIG. 4 shows a view of a screw propeller 10 with three wings 12 from the side and from the front.
  • the screw propeller 10 includes a geometrical volume V vo i defined by its design. This determines together with the rated speed n the theoretical maximum flow rate of the axial pump, which is calculated according to the formula (2).
  • FIG. 5 shows a sectional view of an axial pump 100 which is equipped with a screw propeller wheel 10 according to FIG.
  • the speed of the axial pump 100 is determined by the motor 20 and can be adjusted via a corresponding control unit.
  • the geometric dimensions and shapes of the screw propeller 10 can be adjusted as needed.
  • the housing design can also be tailored to the particular application.

Landscapes

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

Abstract

L'invention concerne une pompe axiale pourvue d'une roue destinée à des plages de fonctionnement à des régimes théoriques spécifiques supérieurs à 500, cette pompe axiale étant caractérisée en ce que la roue est une roue à hélice.
PCT/DE2007/000988 2006-06-23 2007-06-01 Pompe axiale WO2007147380A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102006028806.8 2006-06-23
DE200610028806 DE102006028806A1 (de) 2006-06-23 2006-06-23 Axialpumpe

Publications (1)

Publication Number Publication Date
WO2007147380A1 true WO2007147380A1 (fr) 2007-12-27

Family

ID=38561753

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2007/000988 WO2007147380A1 (fr) 2006-06-23 2007-06-01 Pompe axiale

Country Status (2)

Country Link
DE (1) DE102006028806A1 (fr)
WO (1) WO2007147380A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9651050B2 (en) 2011-12-13 2017-05-16 Xylem Ip Holdings Llc Propeller pump and pump station

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101994702A (zh) * 2010-12-02 2011-03-30 南通蓝天石墨设备有限公司 一种高效石墨轴流泵
ITFI20120210A1 (it) * 2012-10-15 2014-04-16 Nuovo Pignone Srl "high efficiency low specific speed centrifugal pump"

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951565A (en) * 1974-12-09 1976-04-20 Rockwell International Corporation High suction inducer
US4213736A (en) * 1978-06-05 1980-07-22 Innerspace Corporation Turbomachinery and method of operation
EP0657654A1 (fr) * 1993-12-09 1995-06-14 Westinghouse Electric Corporation Pompe pour fluides

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE475984C (de) * 1928-02-26 1929-05-04 Wilhelm Schulz Dr Ing Schaufelform fuer Propeller- und Schraubenpumpen
CH215736A (de) * 1938-09-29 1941-07-15 Limited Macard Screws Schraubenschaufeln aufweisende Fördervorrichtung für flüssige oder gasförmige Medien.
US3168048A (en) * 1962-11-14 1965-02-02 Dengyosha Mach Works Full range operable high specific speed pumps
GB1153993A (en) * 1965-06-16 1969-06-04 Rolls Royce Rotary Impeller Pumps
AUPO879497A0 (en) * 1997-08-26 1997-09-18 Warman International Limited Pump impeller and method
EP1441129A4 (fr) * 2001-11-01 2010-04-14 Ishigaki Mech Ind Turbopompe

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3951565A (en) * 1974-12-09 1976-04-20 Rockwell International Corporation High suction inducer
US4213736A (en) * 1978-06-05 1980-07-22 Innerspace Corporation Turbomachinery and method of operation
EP0657654A1 (fr) * 1993-12-09 1995-06-14 Westinghouse Electric Corporation Pompe pour fluides

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9651050B2 (en) 2011-12-13 2017-05-16 Xylem Ip Holdings Llc Propeller pump and pump station

Also Published As

Publication number Publication date
DE102006028806A1 (de) 2007-12-27

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