US3904319A - Centrifugal pumps - Google Patents

Centrifugal pumps Download PDF

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Publication number
US3904319A
US3904319A US448752A US44875274A US3904319A US 3904319 A US3904319 A US 3904319A US 448752 A US448752 A US 448752A US 44875274 A US44875274 A US 44875274A US 3904319 A US3904319 A US 3904319A
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US
United States
Prior art keywords
chamber
secondary chamber
port
pump
valve means
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
US448752A
Other languages
English (en)
Inventor
Harold Philip Sidney Paish
Henry Smith
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.)
Sykes Pumps Ltd
Original Assignee
Sykes 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 Sykes Pumps Ltd filed Critical Sykes Pumps Ltd
Application granted granted Critical
Publication of US3904319A publication Critical patent/US3904319A/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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/001—Preventing vapour lock
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/004—Priming of not self-priming pumps
    • F04D9/005—Priming of not self-priming pumps by adducting or recycling liquid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/02—Self-priming 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
    • F04D9/00—Priming; Preventing vapour lock
    • F04D9/04—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock
    • F04D9/041—Priming; Preventing vapour lock using priming pumps; using booster pumps to prevent vapour-lock the priming pump having evacuating action

Definitions

  • FiMD 9/00 Ondary Chamber has an upper Opening to said vacuum
  • 7/l99 source whereby gas from said primary chamber is ex- 417ll99 A 200 20! 202 305 306 tracted via the secondary chamber in which entrained 1 liquid is deposited and, on opening said secondary
  • References Cited chamber to atmosphere, the occurring pressure differ- UNITED STATES PATENTS ential between the chambers discharges deposited liq uid in the secondary chamber through said return pas- 1 445507 2/1923 Hacntjcns 417/200 Sageway to the primary chamber 1390.317 lZ/l932 Durdin Jr...
  • the flow-Operated Valve may be arranged to 137 1 774 3 1934 di JrM 4 7 2 0 open said secondary chamber to atmosphere when the 2315946 8/1943 Durdin, Jrm. 4444 417/190 A valve device operates to close said port. and a 2. 41 2 /l 45 ch c l.. 417/200 manually-operable valve may be provided to admit 2535583 l2/l950 Kroll 417/200 atmospheric air to Said secnndary chamber and ff t FOREIGN PATENTS OR APPUCATIONS discharge of the deposited liquid.
  • centrifugal liquid pumps of the kind provided with auxiliary vacuum pumps or like vacuum sources which assist in printing the pumps and removing air during subsequent operation. Centrifugal pumps of this kind are marketed under our Trade Marks Velovac and Univac, and are described in the specifications of our British Pat. Nos. 755,249, 1,048,272 and 1,050,893.
  • centrifugal liquid pump of the kind wherein an auxiliary vacuum pump or like vacuum source assists in priming and removing unwanted gas during subsequent operation, the centrifugal pump being provided with a primary chamber arranged to contain liquid and to receive unwanted gas which has entered the pump, an upper port in said chamber for removal of gas by said vacuum source, float-operated valve means to control said port, a secondary chamber connected at its upper part to said port, a valve-controlled return passageway extending from a lower part of the secondary chamber to said primary chamber, and said secondary chamber has an upper opening to said vacuum source whereby gas from said primary chamber is extracted via the secondary chamber in which entrained liquid is deposited and, on opening said secondary chamber to atmosphere, the occurring pressure differential between the chambers discharges deposited liquid in the secondary chamber through said return passageway to the pri mary chamber.
  • said float-operated valve means are arranged to open said secondary chamber to atmosphere when said valve means operate to close said port.
  • Manually-operable valve means may also be provided to admit atmospheric air to said secondary chamber and effect discharge of the deposited liquid, independently of the floatoperatcd valve means.
  • FIG. 1 is a sectional elevation showing a centrifugal liquid pump
  • FIG. 2 is an end view in the direction of arrow ll of FTG. l;
  • FIG. 3 is a fragmentary section, to an enlarged scale, showing the air separation chamber of the pump.
  • the pump is of the kind described in our aforementioned Patent specifications and functions as a suction pump to deliver water, some times against a substantial head.
  • a continuouslyrunning auxiliary vacuum pump (not shown) is provided for priming t remove air from the centrifugal pump and/or from the suction pipe and for removal of air which, during operation, enters the centrifugal pump through the suction pipe and/or by leakage into the pump casing.
  • the pump now illustrated comprises a primary chamber 10 at the lower part of which a volute casing 11 is arranged.
  • the volute casing houses a rotary impeller 12 mounted at the end of a shaft 13 which extends through side wall 14 of the chamber 10 to be driven by a directcoupled motor (not shown).
  • the shaft 13 drives a belt 15 which drives the auxiliary vacuum pump.
  • the upper part of the chamber 10 acts as a water reservoir and as a float chamber.
  • the chamber 10 is also formed, at a lower part, with an inlet or suction opening 16 for inflow of water, and a port 17 is provided in top wall 18.
  • the port 17 is controlled by a float-valve arrangement and is in communication with the vacuum pump, through an air-separation chamber 19, as will subsequently be described.
  • the volute casing 11 extends tangentially upwardly at 20 to open into an upper sub-chamber 21.
  • a flap valve 22 is provided at the opening into the subchamber 21, and a delivery opening 23 for outflow of water is arranged at the top of the sub-chamber.
  • the pumping unit described above is self-priming.
  • the flap valve 22 is closed and the vacuum pump extracts air from the chamber 10 through the port 17, to draw water in through opening 16.
  • the water rises within chamber 10 to enter the volute entries (not shown) around the level of the shaft 13, and be pumped by the rotating impeller 12 upwardly past the flap valve 22 and through the delivery opening 23.
  • the chamber 10 is partly filled with water, and air which has entered the pump through the suction pipe passes to the space above the water level which is liable to fluctuate and surge.
  • the present pump construction aims to prevent surging water from chamber 10 being carried through to the vacuum pump.
  • the air-separation secondary chamber 19 is arranged alongside chamber 10, and an upper passageway 24 leads from the port 17 to the chamber 19.
  • a valve arrangement 25 is mounted on the top cover 18 of the chamber 10, and is operated by means of a float 26 which is carried by an arm 27 pivotally mounted on a bracket 28 depending from the wall 18, and which is comparable to float 27 of British Pat. No. 1,048,272 or float 32 of British Pat. No. 1,050,893.
  • a return passageway 29 opens from the bottom of the chamber 19, and extends to an upper part of the primary chamber 10.
  • a ball 30 near the lower end of the passageway 29 operates as a one-way valve to control liquid flow through the restricted outlet opening from the passageway.
  • a glass or like transparent plate 3] is secured over an inspection opening 32 in the side wall of the chamber 19.
  • an opening 33 leads through orifices 34 to the auxiliary vacuum pump, and a manually-operated valve device 35 is provided for the purpose hereinafter described.
  • the valve arrangement 25 comprises a stem 36 which is connected to the float-carrying arm 27 and on which are secured lower and upper closure members 37 and 38.
  • a disc 39 is a sliding fit on the stem which is urged upwardly by a helical compression spring 40.
  • the manually-operable valve device 35 comprises a stem 42 to which a two-faced closure member 43 is secured, and the stem is urged upwardly by a helical compression spring 44 acting on a disc 45.
  • the disc 45 is backed by a knob 46 which is screwed onto the threaded upper end of the stem.
  • the valve device 36 which. it is envisaged, may be employed without the valve arrangement 25 or with a simplified float-valve arrangement, performs the following functions:
  • knob 46 A more firm depression of the knob 46 will isolate the vacuum pump and expose chambers 19 and 10 to atmospheric pressure, and thus a blocked suction entry may be cleared by flushing back the water in the system.
  • the spring 44 supplemented by an optional inner spring 47, should be sufficiently powerful to free the closure member 43 from orifice 34 to which a high degree of vacuum may be applied.
  • Adjustment of the degree of compression of spring 44 can cause the valve device 35 to open at any desired degree ofvacuum and so control the pump output and match the liquid flow to the pump suction.
  • a gauge can be inserted at orifice 48 and the knob 46 depressed fully to isolate the auxiliary vacuum pump for testing.
  • valve arrangement 25 operates automatically without requiring the attention of an operator.
  • the provision of the valve device 35 allows an operator to clear the chamber 19 if he notices through the inspection opening 32 that water is collecting and also, of course, allows him to perform the other three functions mentioned above.
  • a float valve or ball valve indicated at 49 in FlG. 3 may be provided to control opening 33.
  • said float-operated valve means comprise an upright stem which extends through said port and is raised and lowered by said float; a lower closure member secured to said stem to seat on said port when the stem is in a raised position; an upper closure member which is secured to said stem and which controls an opening in the pump housing which connects said secondary chamber to atmosphere; an intermediate valve member which slides on said stem and which closes said port when in a lower position; whereby when the stem with the upper closure member is raised by the float. atmospheric air rushes through said opening and moves the intermediate valve member to its lower position to close said port, thereby raising the pressure in said secondary chamber.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
US448752A 1973-03-06 1974-03-06 Centrifugal pumps Expired - Lifetime US3904319A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1092373A GB1467001A (en) 1973-03-06 1973-03-06 Centrifugal pumps

Publications (1)

Publication Number Publication Date
US3904319A true US3904319A (en) 1975-09-09

Family

ID=9976805

Family Applications (1)

Application Number Title Priority Date Filing Date
US448752A Expired - Lifetime US3904319A (en) 1973-03-06 1974-03-06 Centrifugal pumps

Country Status (12)

Country Link
US (1) US3904319A (de)
JP (1) JPS5317161B2 (de)
AT (1) AT333127B (de)
AU (1) AU473511B2 (de)
BE (1) BE811958A (de)
CA (1) CA990581A (de)
DE (1) DE2410042C2 (de)
FR (1) FR2220694B1 (de)
GB (1) GB1467001A (de)
IT (1) IT1015838B (de)
NL (1) NL7403027A (de)
ZA (1) ZA741453B (de)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029438A (en) * 1975-10-20 1977-06-14 Sloan Albert H Well point pumping system and pump assembly therefor
US4249865A (en) * 1979-06-25 1981-02-10 Sloan Albert H Control means for preventing water overflow into vacuum type priming pump
US4253802A (en) * 1978-08-01 1981-03-03 Lucas Industries Limited Liquid fuel injection pumping apparatus
US5660533A (en) * 1995-11-09 1997-08-26 The Gorman-Rupp Company Vacuum assisted priming and cooling system for a pump
US6575706B2 (en) * 1999-02-26 2003-06-10 Roper Holdings, Inc. Vacuum-assisted pump
US20050051211A1 (en) * 2003-08-22 2005-03-10 The Gorman-Rupp Company Priming apparatus for a centrifugal pump
CN100443737C (zh) * 2005-07-28 2008-12-17 重庆海扶(Hifu)技术有限公司 一种能消除气阻的泵
US20220333616A1 (en) * 2021-04-16 2022-10-20 Sulzer Management Ag Debris trap for capturing debris flowing in a stream of liquid and priming assembly for a pump

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6238493U (de) * 1985-08-27 1987-03-07
JPS62184189U (de) * 1986-05-16 1987-11-21
JP2005048652A (ja) * 2003-07-28 2005-02-24 Mitsubishi Electric Corp 自動車用バキュームポンプの排気逆止弁

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1445507A (en) * 1922-01-30 1923-02-13 Haentjens Otto Pump system
US1890317A (en) * 1930-05-15 1932-12-06 Chicago Pump Co Priming apparatus for pumps
US1910775A (en) * 1930-09-13 1933-05-23 Jaeger Machine Co Means for priming liquid pumps
US1971774A (en) * 1932-12-12 1934-08-28 Chicago Pump Co Priming apparatus for centrifugal pumps
US2315946A (en) * 1941-04-07 1943-04-06 Jr Augustus C Durdin Vacuum condensation pump
US2384172A (en) * 1944-06-23 1945-09-04 Wayne Pump Co Pump
US2535583A (en) * 1946-07-26 1950-12-26 Kroll Cornelius Pumping system

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1050893A (de) * 1900-01-01
GB755249A (en) * 1954-02-22 1956-08-22 Sykes Ltd Henry Improvements in or relating to centrifugal pumps
GB1048272A (en) * 1963-03-15 1966-11-16 Sykes Ltd Henry Improvements in or relating to centrifugal pumps
GB1342086A (en) * 1970-04-27 1973-12-25 Sykes Ltd Henry Fluid flow control valves

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1445507A (en) * 1922-01-30 1923-02-13 Haentjens Otto Pump system
US1890317A (en) * 1930-05-15 1932-12-06 Chicago Pump Co Priming apparatus for pumps
US1910775A (en) * 1930-09-13 1933-05-23 Jaeger Machine Co Means for priming liquid pumps
US1971774A (en) * 1932-12-12 1934-08-28 Chicago Pump Co Priming apparatus for centrifugal pumps
US2315946A (en) * 1941-04-07 1943-04-06 Jr Augustus C Durdin Vacuum condensation pump
US2384172A (en) * 1944-06-23 1945-09-04 Wayne Pump Co Pump
US2535583A (en) * 1946-07-26 1950-12-26 Kroll Cornelius Pumping system

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029438A (en) * 1975-10-20 1977-06-14 Sloan Albert H Well point pumping system and pump assembly therefor
US4253802A (en) * 1978-08-01 1981-03-03 Lucas Industries Limited Liquid fuel injection pumping apparatus
US4249865A (en) * 1979-06-25 1981-02-10 Sloan Albert H Control means for preventing water overflow into vacuum type priming pump
US5660533A (en) * 1995-11-09 1997-08-26 The Gorman-Rupp Company Vacuum assisted priming and cooling system for a pump
US6575706B2 (en) * 1999-02-26 2003-06-10 Roper Holdings, Inc. Vacuum-assisted pump
US20050051211A1 (en) * 2003-08-22 2005-03-10 The Gorman-Rupp Company Priming apparatus for a centrifugal pump
US7334600B2 (en) 2003-08-22 2008-02-26 The Gorman-Rupp Company Priming apparatus for a centrifugal pump
CN100443737C (zh) * 2005-07-28 2008-12-17 重庆海扶(Hifu)技术有限公司 一种能消除气阻的泵
US20220333616A1 (en) * 2021-04-16 2022-10-20 Sulzer Management Ag Debris trap for capturing debris flowing in a stream of liquid and priming assembly for a pump
US11649835B2 (en) * 2021-04-16 2023-05-16 Sulzer Management Ag Debris trap for capturing debris flowing in a stream of liquid and priming assembly for a pump

Also Published As

Publication number Publication date
NL7403027A (de) 1974-09-10
JPS5317161B2 (de) 1978-06-06
GB1467001A (en) 1977-03-16
AU6627774A (en) 1975-09-11
FR2220694A1 (de) 1974-10-04
DE2410042C2 (de) 1984-05-10
CA990581A (en) 1976-06-08
ATA173974A (de) 1976-02-15
BE811958A (nl) 1974-07-01
AU473511B2 (en) 1976-06-24
ZA741453B (en) 1975-02-26
AT333127B (de) 1976-11-10
IT1015838B (it) 1977-05-20
FR2220694B1 (de) 1979-01-26
DE2410042A1 (de) 1974-09-12
JPS5024802A (de) 1975-03-17

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