US3692426A - Fluid machines - Google Patents

Fluid machines Download PDF

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Publication number
US3692426A
US3692426A US122353A US3692426DA US3692426A US 3692426 A US3692426 A US 3692426A US 122353 A US122353 A US 122353A US 3692426D A US3692426D A US 3692426DA US 3692426 A US3692426 A US 3692426A
Authority
US
United States
Prior art keywords
pump
passage
chamber
section
throat
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 - Lifetime
Application number
US122353A
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English (en)
Inventor
Michael Leslie Ryall
Guido Pezzani
Albert Bocking
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Weir Pumps Ltd
Original Assignee
Weir Pumps Ltd
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 Weir Pumps Ltd filed Critical Weir Pumps Ltd
Application granted granted Critical
Publication of US3692426A publication Critical patent/US3692426A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/445—Fluid-guiding means, e.g. diffusers especially adapted for liquid pumps

Definitions

  • This invention relates generally to fluid machines and more particularly to a pump and a diffuser for the pump, the axis of the diffuser being arranged tangentially relative to the circle defined by the tips of the pump impeller blades on rotation thereof.
  • the present invention relates to a pump including a casing defining a cylindrical chamber, an inlet passage co-axial with the axis of the chamber, a radial-bladed impeller rotatable about the axis of the chamber, and an outlet passage extending tangentially from the periphery of the chamber, such pump being referred to hereinafter as a pump of the type aforesaid.
  • a pump of the type aforesaid having, for an outlet passage, a diffuser comprising a substantially cylindrical passage in communication with the pump casing, a diffusing section downstream of said cylindrical passage, said section being divergent in the direction of fluid flow, and an intermediate section convergent in the direction of fluid flow and having a convex periphery, the intersection of said intermediate section and said diffusing section defining a throat.
  • a diffuser having a substantially cylindrical passage, a diffusing section divergent in the direction of fluid flow and downstream of said passage, and an intermediate section convergent in the direction of fluid flow and having a convex periphery, the intersection of said intermediate section and said diffusing section defining a throat.
  • FIG. 1 is a sectional perspective view of a pump
  • the pump 10 includes a casing 13 defining a cylindrical chamber 14 into which leads an inlet passage 15 for fluid to be pumped, this passage being co-axial with the axis of the chamber 10.
  • a fluid outlet passage in the form of a diffuser 16 extends tangentially from the periphery of the chamber 14 within which is housed a radial-bladed impeller 17 carried on a shaft 18 which is co-axial with the axis of the chamber.
  • Oil sealing of the gear box 11 is effected by a lip seal (not shown) on the motor shaft and a mechanical seal 47 on the shaft 18.
  • a similar seal 48 acts as a water seal between the pump and the gear box.
  • Contact rings 49 are also provided on the shaft 18.
  • fluid to be pumped is drawn through the inlet passage 15 by the induction impeller 43 which rotates with the impeller 17, the fluid then passing into the chamber 14.
  • the fluid is rotated until it reaches the periphery of the chamber where it enters the recess 19 of the diffuser l6 and then passes through the intermediate section 21 into the diffusing section 20 where most of the kinetic energy imparted to it is converted to pressure energy.
  • the diffuser 16 is so shaped that a falling head/flow characteristic is obtained as the pump out-put increases from zero to a predetermined level.
  • the head delivered by the pump may be varied by changing the diameter of the impeller and a running clearance of one-sixteenth inch or more between the impeller blades and the casing has been found to give acceptable performance.
  • the pump is intended to operate at impeller speeds of up to 18,000 r.p.m. and the induction means is provided to inhibit cavitation at such speeds with low-pressure incoming fluid.
  • Pumps as described above are intended for use in boiler feed applications and mobile and fixed cleaning installations such as an automatic car wash and other general pumping duties.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US122353A 1970-03-31 1971-03-09 Fluid machines Expired - Lifetime US3692426A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1529270 1970-03-31

Publications (1)

Publication Number Publication Date
US3692426A true US3692426A (en) 1972-09-19

Family

ID=10056481

Family Applications (1)

Application Number Title Priority Date Filing Date
US122353A Expired - Lifetime US3692426A (en) 1970-03-31 1971-03-09 Fluid machines

Country Status (4)

Country Link
US (1) US3692426A (OSRAM)
DE (1) DE2114178A1 (OSRAM)
FR (1) FR2087840A5 (OSRAM)
GB (1) GB1307312A (OSRAM)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3788762A (en) * 1972-02-22 1974-01-29 Avco Corp Self-lubricated pump with means for lubricant purification
US3824029A (en) * 1971-04-13 1974-07-16 Cit Alcatel Centrifugal supersonic compressor
US4421457A (en) * 1980-02-08 1983-12-20 Hitachi, Ltd. Diffuser of centrifugal fluid machine
US4494908A (en) * 1980-04-29 1985-01-22 International Standard Electric Corporation Tangential blower
US4789301A (en) * 1986-03-27 1988-12-06 Goulds Pumps, Incorporated Low specific speed pump casing construction
US4923369A (en) * 1987-03-06 1990-05-08 Giw Industries, Inc. Slurry pump having increased efficiency and wear characteristics
WO2010147709A1 (en) 2009-06-17 2010-12-23 Sundyne Corporation Flow output nozzle for centrifugal pump
US9695826B1 (en) * 2012-06-28 2017-07-04 James Harmon Pitot tube pump and related methods
CN114060321A (zh) * 2021-11-01 2022-02-18 青岛海纳特船舶设备制造有限公司 一种带有卧式安装结构的船用轴流风机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104179727B (zh) * 2013-05-22 2019-02-05 德昌电机(深圳)有限公司 泵

Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB268677A (en) * 1926-11-03 1927-04-07 Jethro Thomas Wade Improvements in and relating to turbine pumps and the like
US1914919A (en) * 1931-10-30 1933-06-20 Allis Chalmers Mfg Co Centrifugal pump
US2144417A (en) * 1937-01-11 1939-01-17 Claude B Schneible Sludge pump
US2268358A (en) * 1939-03-13 1941-12-30 Edward T Turner Centrifugal pump
US2715016A (en) * 1952-04-02 1955-08-09 Veneziani Italo Hydraulic rotary system of drilling with reverse water circulation
CA640239A (en) * 1962-04-24 Shell Oil Company Pump with restrictive orifice
US3071077A (en) * 1958-11-25 1963-01-01 Ingersoll Rand Co Centrifugal pump
US3162135A (en) * 1961-02-20 1964-12-22 Sundstrand Corp Centrifugal pumps
US3244109A (en) * 1963-07-19 1966-04-05 Barske Ulrich Max Willi Centrifugal pumps
US3260216A (en) * 1964-08-21 1966-07-12 Goulds Pumps Venturi-centrifugal pump
US3333762A (en) * 1966-11-16 1967-08-01 United Aircraft Canada Diffuser for centrifugal compressor

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA640239A (en) * 1962-04-24 Shell Oil Company Pump with restrictive orifice
GB268677A (en) * 1926-11-03 1927-04-07 Jethro Thomas Wade Improvements in and relating to turbine pumps and the like
US1914919A (en) * 1931-10-30 1933-06-20 Allis Chalmers Mfg Co Centrifugal pump
US2144417A (en) * 1937-01-11 1939-01-17 Claude B Schneible Sludge pump
US2268358A (en) * 1939-03-13 1941-12-30 Edward T Turner Centrifugal pump
US2715016A (en) * 1952-04-02 1955-08-09 Veneziani Italo Hydraulic rotary system of drilling with reverse water circulation
US3071077A (en) * 1958-11-25 1963-01-01 Ingersoll Rand Co Centrifugal pump
US3162135A (en) * 1961-02-20 1964-12-22 Sundstrand Corp Centrifugal pumps
US3244109A (en) * 1963-07-19 1966-04-05 Barske Ulrich Max Willi Centrifugal pumps
US3260216A (en) * 1964-08-21 1966-07-12 Goulds Pumps Venturi-centrifugal pump
US3333762A (en) * 1966-11-16 1967-08-01 United Aircraft Canada Diffuser for centrifugal compressor

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3824029A (en) * 1971-04-13 1974-07-16 Cit Alcatel Centrifugal supersonic compressor
US3788762A (en) * 1972-02-22 1974-01-29 Avco Corp Self-lubricated pump with means for lubricant purification
US4421457A (en) * 1980-02-08 1983-12-20 Hitachi, Ltd. Diffuser of centrifugal fluid machine
US4494908A (en) * 1980-04-29 1985-01-22 International Standard Electric Corporation Tangential blower
US4789301A (en) * 1986-03-27 1988-12-06 Goulds Pumps, Incorporated Low specific speed pump casing construction
US4923369A (en) * 1987-03-06 1990-05-08 Giw Industries, Inc. Slurry pump having increased efficiency and wear characteristics
WO2010147709A1 (en) 2009-06-17 2010-12-23 Sundyne Corporation Flow output nozzle for centrifugal pump
US20100322761A1 (en) * 2009-06-17 2010-12-23 Hunjan Harjit S Flow output nozzle for centrifugal pump
CN102459918A (zh) * 2009-06-17 2012-05-16 胜达因公司 用于离心泵的流量输出喷嘴
JP2012530863A (ja) * 2009-06-17 2012-12-06 サンダイン コーポレーション 遠心ポンプ用の流れ出力ノズル
US8419358B2 (en) 2009-06-17 2013-04-16 Sundyne, Llc Flow output nozzle for centrifugal pump
US9695826B1 (en) * 2012-06-28 2017-07-04 James Harmon Pitot tube pump and related methods
CN114060321A (zh) * 2021-11-01 2022-02-18 青岛海纳特船舶设备制造有限公司 一种带有卧式安装结构的船用轴流风机
CN114060321B (zh) * 2021-11-01 2023-09-29 青岛海纳特船舶设备制造有限公司 一种带有卧式安装结构的船用轴流风机

Also Published As

Publication number Publication date
DE2114178A1 (de) 1971-10-14
FR2087840A5 (OSRAM) 1971-12-31
GB1307312A (en) 1973-02-21

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