US3767321A - Seal means for axial flow pump and the like - Google Patents

Seal means for axial flow pump and the like Download PDF

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Publication number
US3767321A
US3767321A US00257387A US3767321DA US3767321A US 3767321 A US3767321 A US 3767321A US 00257387 A US00257387 A US 00257387A US 3767321D A US3767321D A US 3767321DA US 3767321 A US3767321 A US 3767321A
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United States
Prior art keywords
axial flow
sleeve
shaft
pump
impeller
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Expired - Lifetime
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US00257387A
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English (en)
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R Layne
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Individual
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Individual
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    • 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps

Definitions

  • ABSTRACT Disclosed is means for preventing leakage from about the shaft of an axial flow pump, the shaft extending through a housing wall.
  • the means includes a sleeve for the shaft which is fixed at one end to the housing wall and is flared at its other end adjacent the pump impeller.
  • the flared end forms a housing for a centrifugal pump rotor on the shaft, the centrifugal pump rotor being arranged to pump counter to the axial flow pump to prevent liquid from rising in the sleeve and leaking from about the shaft.
  • the present invention relates generally to a vertically oriented axial flow pump having a bottom located inlet and a top located outlet, wherein the drive shaft for the pump extends through an upper end wall of the housing pump. More particularly, the present invention relates to means for preventing leakage from about the drive shaft without the use of rotating pressure seals contacting and extending between the shaft and end wall.
  • Axial flow pumps usually have the impeller shaft extending through an end wall of the pump housing. Providing an effective seal between this end wall and the impeller shaft presents somewhat of a problem, particularly where the pump is arrnaged so that fluid flow is toward this end wall. Rotating seals or gaskets may be provided between the end wall and the impeller shaft, but these are not entirely suitable because of the wear problem and the need for periodic replacement of rotating seal.
  • the present invention may be characterized in one aspect thereof by the provision of an axial flow pump including a housing having an inlet and outlet; a housing end wall adjacent the pump outlet; an impeller shaft extending through an opening in the end wall; a'sleeve member about the impeller shaft, one end of the sleeve member being fixed to the end wall about the opening, and the other end of the sleeve member having a flared section forming a centrifugal pump housing adjacent the axial flow impeller on the shaft; and a centrifugal pump rotor on the shaft in the flared section arranged to pump liquid in the sleeve in an axial direction away from the end wall, wherein the action of the centrifugal pump balances the pressure produced in the sleeve by the axial flow impeller to prevent liquid from rising in the sleeve to the level of the opening.
  • FIGURE is a side elevation view partly broken away and in section showing the axial flow pump of the present invention.
  • the axial flow pump of the present invention is generally designated at 10.
  • the pump includes a tubular housing 12 depending from a top member 14.
  • the top member functions as an end wall of the housing.
  • the other end 16 of the housing forms an open pump inlet.
  • End 16 may be connected to a reservoir of the liquid to be pumped by any suitable means, such as immersing the inlet below the level of liquid in reservoir 18, as shown, or by suitable conduct means, not shown.
  • the pump outlet shown at 20 is above the level of liquid in reservoir 18.
  • the pump impeller shaft 24 Extending through an opening 22 in end wall 14 is the pump impeller shaft 24.
  • the shaft extends down through the housing and carries on its lower end 26, a hub 28 and an axial flow impeller 30.
  • Any suitable means such as a beltand pulley drive 44 can be used to rotate the impeller shaft.
  • impeller 30 drives the liquid upwardly in housing 16 and out through discharge 20. If the discharge is located very close to end wall 14 or if the pump exerts a sufficient force, the entire housing 12, even that portion above the level of discharge 20, will be filled with liquid. Since this liquid is under pressure due to the action of impeller 30, there is the possibility of liquid leaking through opening 22 about shaft 24. This leakage of course can be prevented by a suitable rotating seal at this point. However, as set forth hereinabove, such rotating seals are not completely satisfactory .in that they wear and must be replaced periodically.
  • Means for eliminating the need of any rotating seal between wall opening'22 and impeller 24 is provided in the present invention by having a sleeve member 32 disposed about impeller shaft 24.
  • the sleeve member has its upper end 34 fixed to end wall 14 in a fluid tight joint.
  • a static seal such as an O-ring 36, can be located between the upper sleeve end 34 and wall 14.
  • the lower end of the sleeve has an outwardly flared portion 38, which is disposed about the-upper portion 40 of impeller hub 28.
  • the upper portion of the impeller hub is generally conical in shape to fit into the flared sleeve end.
  • this portion of the hub is provided with a series of axially extending grooves 42 formed integral the hub.
  • This centrifugal pump formed by flared sleeve end 38 and hub portion 40 is arranged to pump fluid in a direction out of sleeve 32 and away from end wall 14 as the impeller shaft rotates.
  • centrifugal pump rotor 40 is to pump liquid out of the sleeve away from the end wall and towards the pump inlet.
  • the present invention accomplishes its intended objects in providing means for preventing leakage from about the impeller shaft of an axial flow pump without the need for any rotating seals contacting the shaft.
  • a scrollor screw type pump can be provided on impeller shaft 28 rather than the centrifugal pump shown.
  • Such an arrangement would eliminate the need for flaring one end of sleeve 32.
  • grooves 42 can be inclined on the hub to produce both centrifugal and axial flow.
  • An axial flow pump comprising:
  • an impeller shaft extending down through said opening into said housing including an axial flow impeller on said shaft for pumping liquid through said housing and outlet;
  • a sleeve disposed about said shaft, said sleeve having an upper end rigidly fixed to said end wall about said opening in a liquid tight seal and a lower end formed with an outwardly flared portion, the outer diameter of said sleeve being smaller than the outer diameter of said impeller;
  • An axial flow pump as set forth in claim 1 comprising:
  • said upper hub portion being conical in shape and fitting-into said outwardly flared sleeve portion, said upper hub portion comprising said centrifugal pump rotor.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00257387A 1972-05-26 1972-05-26 Seal means for axial flow pump and the like Expired - Lifetime US3767321A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US25738772A 1972-05-26 1972-05-26

Publications (1)

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US3767321A true US3767321A (en) 1973-10-23

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US00257387A Expired - Lifetime US3767321A (en) 1972-05-26 1972-05-26 Seal means for axial flow pump and the like

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US (1) US3767321A (show.php)
JP (1) JPS4950502A (show.php)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3936221A (en) * 1974-09-16 1976-02-03 Goulds Pumps, Inc. Vertical cantilever pump
US4013383A (en) * 1973-12-03 1977-03-22 Rule Industries, Inc. Vertical shaft impeller pump apparatus
US4741664A (en) * 1987-03-16 1988-05-03 Thompson-Chemtrex, Inc. Portable pump
US4875827A (en) * 1986-12-24 1989-10-24 Flux Gerate Gmbh Fluid pump and method for making the same
US20070065317A1 (en) * 2005-09-19 2007-03-22 Ingersoll-Rand Company Air blower for a motor-driven compressor
US20170037852A1 (en) * 2009-06-16 2017-02-09 Pyrotek, Inc. Overflow vortex transfer system
US20180023594A1 (en) * 2016-07-25 2018-01-25 Dongguan Zhenpin Hardware Cooling Technology Co. L td Water Pump Cooler for CPU

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2468704A (en) * 1947-10-11 1949-04-26 Dow Chemical Co Apparatus for handling molten magnesium and its alloys
US2470563A (en) * 1944-01-03 1949-05-17 Irving C Jennings Pump
US2624286A (en) * 1948-10-12 1953-01-06 Thompson Prod Inc Submerged pump and motor assembly
US2839006A (en) * 1956-07-12 1958-06-17 Kellogg M W Co Pumps for high vapor pressure liquids
US2865296A (en) * 1958-12-23 Bungartz
US3160106A (en) * 1962-03-08 1964-12-08 Abrasive Dev Centrifugal pumps
US3416729A (en) * 1966-08-12 1968-12-17 Richards Of Rockford Inc Liquid aerator
US3535051A (en) * 1968-12-03 1970-10-20 Ellicott Machine Corp Recessed expeller vanes

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2865296A (en) * 1958-12-23 Bungartz
US2470563A (en) * 1944-01-03 1949-05-17 Irving C Jennings Pump
US2468704A (en) * 1947-10-11 1949-04-26 Dow Chemical Co Apparatus for handling molten magnesium and its alloys
US2624286A (en) * 1948-10-12 1953-01-06 Thompson Prod Inc Submerged pump and motor assembly
US2839006A (en) * 1956-07-12 1958-06-17 Kellogg M W Co Pumps for high vapor pressure liquids
US3160106A (en) * 1962-03-08 1964-12-08 Abrasive Dev Centrifugal pumps
US3416729A (en) * 1966-08-12 1968-12-17 Richards Of Rockford Inc Liquid aerator
US3535051A (en) * 1968-12-03 1970-10-20 Ellicott Machine Corp Recessed expeller vanes

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4013383A (en) * 1973-12-03 1977-03-22 Rule Industries, Inc. Vertical shaft impeller pump apparatus
US3936221A (en) * 1974-09-16 1976-02-03 Goulds Pumps, Inc. Vertical cantilever pump
US4875827A (en) * 1986-12-24 1989-10-24 Flux Gerate Gmbh Fluid pump and method for making the same
US4741664A (en) * 1987-03-16 1988-05-03 Thompson-Chemtrex, Inc. Portable pump
US20070065317A1 (en) * 2005-09-19 2007-03-22 Ingersoll-Rand Company Air blower for a motor-driven compressor
US9261104B2 (en) 2005-09-19 2016-02-16 Ingersoll-Rand Company Air blower for a motor-driven compressor
US20170037852A1 (en) * 2009-06-16 2017-02-09 Pyrotek, Inc. Overflow vortex transfer system
US11187233B2 (en) * 2009-06-16 2021-11-30 Pyrotek, Inc. Overflow vortex transfer system
US20220082101A1 (en) * 2009-06-16 2022-03-17 Pyrotek, Inc. Overflow vortex transfer system
US11939993B2 (en) * 2009-06-16 2024-03-26 Pyrotek, Inc. Overflow vortex transfer system
US20180023594A1 (en) * 2016-07-25 2018-01-25 Dongguan Zhenpin Hardware Cooling Technology Co. L td Water Pump Cooler for CPU
US10883518B2 (en) * 2016-07-25 2021-01-05 Dongguan Zhenpin Hardware Cooling Technology Co. Ltd Water pump cooler for CPU

Also Published As

Publication number Publication date
JPS4950502A (show.php) 1974-05-16

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