US3483824A - Rotary pump with check valve - Google Patents

Rotary pump with check valve Download PDF

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Publication number
US3483824A
US3483824A US3483824DA US3483824A US 3483824 A US3483824 A US 3483824A US 3483824D A US3483824D A US 3483824DA US 3483824 A US3483824 A US 3483824A
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US
United States
Prior art keywords
housing
passageway
vanes
impeller
pump
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
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English (en)
Inventor
Theodore S Sprague
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.)
Babcock and Wilcox Co
Original Assignee
Babcock and Wilcox Co
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 Babcock and Wilcox Co filed Critical Babcock and Wilcox Co
Application granted granted Critical
Publication of US3483824A publication Critical patent/US3483824A/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
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0077—Safety measures
    • F04D15/0083—Protection against sudden pressure change, e.g. check valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/0077—Safety measures
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/7722—Line condition change responsive valves
    • Y10T137/7837—Direct response valves [i.e., check valve type]
    • Y10T137/7838—Plural
    • Y10T137/7839—Dividing and recombining in a single flow path

Definitions

  • the pump generally comprises a housing having an extended portion adapted to extend substantially axially of a portion of the passageway.
  • a motorized drive shaft rotates within the housing and has a free end which extends from the extended portion of the passageway.
  • An impeller is mounted on the free end of the shaft for rotation by the shaft as the shaft rotates.
  • a check valve is mounted on the pump housing at the suction side of the impeller.
  • a rotary pump is adapted to circulate fluid through a passageway having an inlet and an outlet.
  • the inlet and outlet may be considered to be the common inlet and common outlet of a plurality of pumps arranged in a parallel fluid flow configuration one with the other.
  • the pump is provided with an elongated housing portion which extends axially of the passageway between the inlet and outlet.
  • the pump shaft protrudes from the housing into the passageway and an impeller is removably mounted on the free end of the shaft for rotation with the shaft.
  • a plurality of vanes are pivoted to the housing within the passageway On the suction side of the impeller and arranged to close the passageway when fluid backs up within the passageway.
  • the discharge from the remaining operating pump causes the fluid in the common outlet header to back up within the portion of the passageway within which the failed pump is disposed and pivot the vanes closed.
  • the arrangement thus closes off the passageway when a pump fails while the other pumps are operating.
  • the vanes are open, as while the pump is operating, the vanes are arranged to direct the fluid substantially longitudinally of the passageway and into the pump impeller so that the pump efficiency is enhanced.
  • inventive arrangement of the vanes within the passageway and with respect to the impeller is thought to be of general application to hydraulic systems.
  • the inventive arrangement is therefore not limited to applications in nuclear reactors or parallel fluid circuits.
  • FIG. 1 is a side elevation view of a pump showing the check valve closed
  • FIG. 1A is a schematic view of a plurality of pumps arranged in parallel
  • FIG. 2 is a partial side elevation view of the pump showing the check valve open
  • FIG. 3 is a partial plan view of the check valve taken along the line 33 of FIG. 1,
  • FIG. 4 is a partial elevation view of the check valve taken along the line 44 of FIG. 3,
  • FIG. 5 is an elevation view similar to FIG. 4 showing the valve open
  • FIG. 6 is a reduced plan view similar to FIG. 3 showing another embodiment of the invention.
  • FIG. 1 a rotary pump 10 adapted to circulate a substantially incompressible fluid through a passageway 11 having an inlet 12 and outlet 13.
  • the pump 10 generally includes a housing 14 with an elongated annular portion 15 adapted to extend substantially axially of a portion of the passageway 11, a motorized output drive shaft 16 journalled for rotation within the housing 14 and having a free end 17 which extends beyond the annular portion 15 of the housing, an impeller 18 removably mounted on the free end 17 of the shaft 16 for rotation within the passageway 11 as the shaft rotates, and a plurality of vanes 19 pivotally mounted on the housing within the passageway 11 for motion toward and away from one another to act as a louvered check valve on the suction side of the impeller 18.
  • the passageway 11 to which the preferred embodiment is adapted is formed by an open-ended L-shaped conduit 20 having an elongated annular portion 20A intermediate the inlet 12 and outlet 13.
  • the passageway shown is intended to be representative of any passageway through which an incompressible fluid may be circulated and that persons skilled in the art may adapt the device to passageways of other construction Without departing from the spirit or scope of the invention.
  • the annular portion may be formed by providing a sleeve (not shown) within the passageway, as is well known in the art.
  • the conduit 21 has an opening 21 formed therein through which the housing 14 protrudes sufiiciently to allow the impeller 18 and vanes 19 to be positioned properly within the pasageway 11. It is seen that the housing 14 is mounted on the conduit 29 and supported in place so as to close the opening 21.
  • a portion of the outer surface 20F of the conduit 20 is faced to form a platform for an enlarged portion 22 of the housing 14.
  • the enlarged portion 22, or flange is provided with a mating surface 22F complementary to the faced surface 20F of the conduit 20 and is mounted in place on the conduit by means well known in the art to form a fluid tight seal between the mating surfaces.
  • the louver-type check valve is an annularly shaped valve comprising a plurality of curved vanes 19 mounted on the housing for limited rotation between an open position as shown in FIG. 2 and a closed position as shown in FIG. 1. It is seen that the vanes are substantially equidistantly spaced around the housing. As best shown in FIGS. 4 and 5, each vane 19 has a rounded leading edge 27 with a curved body portion 28 extending therefrom which gradually tapers to a trailing edge 29 remote from the leading 27.
  • the vanes are formed from sheet metal and are hollow. They may be fabricated having a solid cross-section without departing from the spirit and scope of the invention. As best shown in FIGS.
  • each vane 19 is freely pivotally mounted and is rotatable about an axis extending substantially radially of the axis of the annular portion 15 of the housing.
  • the vanes 19 are individually rotatable from the closed position to the open position and returnable to the closed position in response to the flow fluid within the conduit 20.
  • each vane has a substantially straight inboard end 30 adjacent the annular housing portion 15 and a curved outboard end 31 or tip, having a curvature which corresponds to the contour of inner surface of the conduit 20. As viewed in the closed position shown in FIG.
  • the inboard end 30 is formed substantially perpendicular to the axis of rotation of the vane
  • the trailing edge 29 is formed substantially parallel with the axis of rotation of the vane next adjacent to the trailing edge
  • the outboard end 31 is arcuately formed to describe a portion of the circumference of a circle concentric with the axis of the annular portion 15 of the housing
  • the leading edge 27 is formed substantially parallel with the axis of rotation of the vane.
  • each vane defines an upstream surface 32 remote from the impeller and a downstream surface 33 adjacent the impeller.
  • the leading edge end of each vane had a larger cross section than the trailing edge end and has a circular recess 35 extending therethrough substantially parallel with the leading edge of the vane.
  • a plurality of pivot pins 36 mounted on the annular portion 15 of the housing and extending radially therefrom act as supports for the vanes.
  • Each pin 36 is a rod having one end 37 externally threaded and the other end terminated by a head portion 38.
  • the annular portion 15 of the housing is provided with a plurality of internally threaded recesses 39 having axes oriented radially of the axis of the housing to threadably receive the pins.
  • the vane recesses 35 are counterbored from the outboard end 31 to form enlarged recesses 38A to accommodate the head portions 38 of the pins 36.
  • the head portions 38 hold the vanes in place for rotation about the pins and prevent the vanes from moving endwise of the pins.
  • the head portion 38 is adapted to accommodate any driving tool well known in the art for threadably engaging the pin with the housing.
  • the annular portion 15 of the housing 14 is provided with a plurality of stops 40 extending radially from the housing into the passageway.
  • the stops 40 are substantially equidistantly spaced around the housing and correspond in number of the number of vanes. Each of the stops 40 defines the extreme open position for one of the vanes.
  • each vane commences rotation from the closed position as fluid flows against the upstream surface 32 of the vanes and continues to so rotate until the downstream surface 33 of each vane contacts the stop 40 corresponding thereto.
  • a reversal of fluid flow within the passageway returns the vanes to the closed position.
  • the vanes are pivoted to the open position they are arranged to direct the flow of fluid longitudinally of the passageway. That is, the stops 40 are arranged to position the vanes .4 such that a line drawn tangent to the upstream surface 32 of a vane at the trailing edge 29 is substantially parallel to the axis of the passageway 11 and annular portion 15 of the housing 14.
  • the vanes commence rotation from the open position as fluid flows against the downstream surface 33 of the vanes, and causes them to rotate until the upstream surface 32 contacts the vane next adjacent.
  • the vanes overlap one another and acts as stop one for the other, to define the closed position.
  • the annular portion 15 of the housing 14 is substantially cylindrically shaped.
  • a substantially triangular space 50 exists between the inboard end 30 of each vane and the outer periphery of the housing.
  • a limited amount of fluid flows longitudinally of the housing even when the vanes are in the closed position.
  • the summation of the incremental spaces 50 decreases and the volume of fluid flow is decreased correspondingly.
  • a plurality of flat surface 51 are formed on the housing.
  • the annular portion 15 of the housing 14 may be formed having an octagonally shaped outer surface to accommodate an eight-vaned configuration such that the inboard end 30 of each vane is disposed substantially parallel with respect to the outer periphery of the housing as the vane rotates.
  • the aforementioned spaces 50 are substantially completely eliminated with the result that fluid flow longitudinally of the passageway is also substantially completely eliminated when the vanes are in the closed position.
  • An improved rotary pump adaptable for circulating a substantially incompressible fluid through a passageway the pump generally comprising, a housing having a portion formed to extend substantially axially of a portion of the passageway, a motorized drive shaft rotatable within the housing, a free end of the shaft extending from the extended portion of the housing, and an impeller mounted on the free end of the shaft for rotation by the shaft as the shaft rotates, a check valve mounted on the pump housing at the suction side of the impeller for closing the passageway when fluid backs up within the passageway, the check valve being an annularly-shaped valve comprising curved vanes mounted on the housing for limited rotation in place between an open position and a closed posit1on.
  • An improved rotary pump adaptable for circulating a substantially incompressible fluid through a passageway the pump generally comprising, a housing having a portion formed to extend substantially axially of a portion of the passageway, a motorized drive shaft rotatable within the housing, a free end of the shaft extending from the extended portion of the housing, and an impeller mounted on the free end of the shaft for rotation by the shaft as the shaft rotates, a check valve mounted on the pump housing at the suction side of the impeller for closing the passageway when fluid backs up within the passageway, the check valve comprising a plurality of curved vanes, a plurality of pins mounted on the housing and extending radially thereof each pin acting as a pivot pin for one of the vanes, the vanes having an open position in which they are arranged to direct the fluid substantially longitudinally of the passageway when impeller rotation induces fluid flow therein and having a closed position in which they are arranged to overlap one another to impede the flow of fluid when fluid tends to flow in a
  • an improved rotary pump adaptable for circulating a substantially incompressible fluid through a passageway the pump generally comprising,
  • a housing having a portion for-med to extend substantially axially of a portion of the passageway, a motorized drive shaft rotatable within the housing, a free end of the shaft extending from the extended portion of the housing, and an impeller mounted on the free end of the shaft for rotation by the shaft as the shaft rotates, a check valve mounted on the pump housing at the suction side of the impeller for closing the passageway when fluid backs up within the passageway, the check valve comprising a plurality of pins mounted on the extended portion of the housing and extending radially thereof on the suction side of the impeller, a plurality of vanes, each vane being pivotally mounted on one of the pins, the vanes having an open position and a closed position, a plurality of stops mounted on the extended portion of the housing and extending radially thereof on the suction side of the impeller intermediate the impeller and pins, each stop defining the open position of one of the vanes, the vanes being arranged to overlap one another to define the closed position for each of
  • An improved rotary pump adaptable for circulating a substantially incompressible fluid through a passageway the pump generally comprising, a housing having a portion formed to extend substantially axially of a portion of the passageway, a motorized drive shaft rotatable within the housing, a free end of the shaft extending from the extended portion of the housing, and an impeller mounted on the free end of the shaft for rotation by the shaft as the shaft rotates, a check valve mounted on the pump housing at the suction side of the impeller for closing the passageway when fluid backs up within the passageway and opening in response to the impeller induced flow, the check valve being an annularly-shaped valve comprising vanes freely pivotally mounted on the housing for limited rotation in place between an open position and a closed position.
  • each vane overlaps the next adjacent vane when they are in the closed position.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
US3483824D 1967-09-15 1967-09-15 Rotary pump with check valve Expired - Lifetime US3483824A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US66875267A 1967-09-15 1967-09-15

Publications (1)

Publication Number Publication Date
US3483824A true US3483824A (en) 1969-12-16

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ID=24683575

Family Applications (1)

Application Number Title Priority Date Filing Date
US3483824D Expired - Lifetime US3483824A (en) 1967-09-15 1967-09-15 Rotary pump with check valve

Country Status (6)

Country Link
US (1) US3483824A (xx)
JP (1) JPS502441B1 (xx)
BE (1) BE720881A (xx)
FR (1) FR1579884A (xx)
GB (1) GB1242119A (xx)
NL (1) NL6813135A (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4029433A (en) * 1974-12-17 1977-06-14 Caterpillar Tractor Co. Stator vane assembly
US4043868A (en) * 1974-11-20 1977-08-23 Kraftwerk Union Aktiengesellschaft Water-cooled nuclear reactor with loss-of-coolant protection
US4277310A (en) * 1974-05-20 1981-07-07 Kraftwerk Union Ag Water-cooled nuclear reactor
US4735045A (en) * 1983-03-04 1988-04-05 Innerspace Corporation Limited discharge bidirectional thruster and method of operation
US20110252779A1 (en) * 2009-10-23 2011-10-20 Dresser-Rand Company Energy conversion system with duplex radial flow turbine
RU2581748C2 (ru) * 2014-03-06 2016-04-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" Пропеллерный насос
US10487740B2 (en) 2015-06-17 2019-11-26 Hamilton Sundstrand Corporation Multi-flapper check valve without center supports

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59220860A (ja) * 1983-05-30 1984-12-12 Sharp Corp 演算手順の選択方式
JPH0163427U (xx) * 1987-10-20 1989-04-24
US7184268B2 (en) * 2005-01-10 2007-02-27 Hewlett-Packard Development Company, L.P. Dynamically adaptable electronics cooling fan

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US890117A (en) * 1906-11-30 1908-06-09 Austin Organ Company Centrifugal blower.
US1460428A (en) * 1919-07-03 1923-07-03 Moody Lewis Ferry Pump and method of regulating the same
US1683949A (en) * 1927-05-20 1928-09-11 York Ice Machinery Corp Brine circulator
US2030560A (en) * 1934-09-14 1936-02-11 Jr James L Adams Screw pump
US2459815A (en) * 1947-01-23 1949-01-25 Eurcka Williams Corp Automatic air shutoff and draft control for oil burners
US2947466A (en) * 1956-08-31 1960-08-02 Konink Machinenfabriek Gebr St Axial flow fans
US3118467A (en) * 1961-02-23 1964-01-21 Kuhn John Automatic check valve
US3160112A (en) * 1958-07-31 1964-12-08 Westinghouse Electric Corp Check valve and application thereof
US3263906A (en) * 1963-07-22 1966-08-02 Task Corp Stator vane check valve

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US890117A (en) * 1906-11-30 1908-06-09 Austin Organ Company Centrifugal blower.
US1460428A (en) * 1919-07-03 1923-07-03 Moody Lewis Ferry Pump and method of regulating the same
US1683949A (en) * 1927-05-20 1928-09-11 York Ice Machinery Corp Brine circulator
US2030560A (en) * 1934-09-14 1936-02-11 Jr James L Adams Screw pump
US2459815A (en) * 1947-01-23 1949-01-25 Eurcka Williams Corp Automatic air shutoff and draft control for oil burners
US2947466A (en) * 1956-08-31 1960-08-02 Konink Machinenfabriek Gebr St Axial flow fans
US3160112A (en) * 1958-07-31 1964-12-08 Westinghouse Electric Corp Check valve and application thereof
US3118467A (en) * 1961-02-23 1964-01-21 Kuhn John Automatic check valve
US3263906A (en) * 1963-07-22 1966-08-02 Task Corp Stator vane check valve

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4277310A (en) * 1974-05-20 1981-07-07 Kraftwerk Union Ag Water-cooled nuclear reactor
US4043868A (en) * 1974-11-20 1977-08-23 Kraftwerk Union Aktiengesellschaft Water-cooled nuclear reactor with loss-of-coolant protection
US4029433A (en) * 1974-12-17 1977-06-14 Caterpillar Tractor Co. Stator vane assembly
US4735045A (en) * 1983-03-04 1988-04-05 Innerspace Corporation Limited discharge bidirectional thruster and method of operation
US20110252779A1 (en) * 2009-10-23 2011-10-20 Dresser-Rand Company Energy conversion system with duplex radial flow turbine
US8286425B2 (en) * 2009-10-23 2012-10-16 Dresser-Rand Company Energy conversion system with duplex radial flow turbine
RU2581748C2 (ru) * 2014-03-06 2016-04-20 Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный технический университет" Пропеллерный насос
US10487740B2 (en) 2015-06-17 2019-11-26 Hamilton Sundstrand Corporation Multi-flapper check valve without center supports

Also Published As

Publication number Publication date
BE720881A (xx) 1969-02-17
FR1579884A (xx) 1969-08-29
JPS502441B1 (xx) 1975-01-27
GB1242119A (en) 1971-08-11
NL6813135A (xx) 1969-03-18

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