EP0537128B1 - Pump - Google Patents

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Publication number
EP0537128B1
EP0537128B1 EP92850211A EP92850211A EP0537128B1 EP 0537128 B1 EP0537128 B1 EP 0537128B1 EP 92850211 A EP92850211 A EP 92850211A EP 92850211 A EP92850211 A EP 92850211A EP 0537128 B1 EP0537128 B1 EP 0537128B1
Authority
EP
European Patent Office
Prior art keywords
housing
drive shaft
impeller
centrifugal pump
pump apparatus
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
EP92850211A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0537128A2 (en
EP0537128A3 (en
Inventor
Steve Ericson
Wallace W. Ericson
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.)
ERICSON SAFETY PUMP Corp
Original Assignee
ERICSON SAFETY PUMP Corp
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 ERICSON SAFETY PUMP Corp filed Critical ERICSON SAFETY PUMP Corp
Publication of EP0537128A2 publication Critical patent/EP0537128A2/en
Publication of EP0537128A3 publication Critical patent/EP0537128A3/en
Application granted granted Critical
Publication of EP0537128B1 publication Critical patent/EP0537128B1/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
    • F04D1/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D1/006—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps double suction 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
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • F04D17/162—Double suction 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/20—Mounting rotors on shafts
    • 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
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/263—Rotors specially for elastic fluids mounting fan or blower rotors on shafts

Definitions

  • This invention is generally directed to centrifugal pumps having rotatably driven impellers mounted within a housing so as to create a fluid flow through such housing between an inlet and an outlet therein. More particularly, the invention provides a centrifugal pump which includes an impeller that couples an engine to a drive shaft and is rotatably disposed within the housing. Opposing fluid inlets are created between the sides of the housing and the drive shaft from which fluids are directed to a fluid outlet also formed in the housing.
  • U.S. Pat. No. 4,688,987 to Ericson et al discloses a centrifugal pump having a split impeller which is mounted directly to an existing drive shaft.
  • the inner surfaces of the hub portions of the split impeller are knurled or otherwise provided with ridges as to bite or lock the hub against the drive shaft when the two portions of the impeller are joined together.
  • This prior centrifugal pump is particularly adapted for use in the engine compartment or hull of a marine vessel wherein the impellers is attached for rotation with the drive shaft, such as a propeller drive shaft, and wherein the pump housing is mounted so as to be in a surrounding and spaced relationship to the impeller blades and drive shaft.
  • the impeller is freely rotatable in order to pump fumes or fluids through annular intake openings between the drive shaft and pump housing and deliver the same through an outlet formed in the pump housing.
  • a self priming centrifugal pump apparatus as defined in claim 1 for use in an atmosphere subject to the build-up of hazardous gases or other fluids .
  • the apparatus comprises a drive shaft, an engine or motor for driving said drive shaft, a housing having front and rear walls, a peripheral side walls and, fluid inlet openings which surround the power source and provides equal pressure from both sides on an impeller.
  • Mounting means is provided for securing the housing so as to be in a fixed, spaced and non-contacting relationship around the drive shaft.
  • An impeller means which is sloped on two sides forms a coupling of the motor with the drive shaft within and in spaced relationship with the housing. The slope expedites movement of the liquid outward to the vanes. Accordingly, the impeller and housing cooperate to discharge hazardous fluids in response to the rotation of the drive shaft without any substantial generation of heat due to friction.
  • the housing comprises front, rear and side wall portions at least, a pair of opposing fluid inlet openings in said front and rear walls of said housing providing equal pressure from both sides on the impeller means, each of said fluid inlet openings being of a greater dimension than said first cross sectional dimension of the drive shaft.
  • the housing is provided with at least two sections which are divided along lines which intersect with the fluid inlet openings. Means is provided for selectively uniting the sections so as to enclose a portion of the length of the drive shaft therebetween and through each of the fluid inlet openings.
  • the drive shaft according to this embodiment extends through fluid inlet openings in spaced non-contacting relationship to the housing so that fluids entering the housing under equal pressure, passes around the drive shaft, along the sloped impeller to the impeller blades that propel the fluid outlet opening.
  • the discharge opening is formed in the side wall of the housing and includes a nozzle means for creating a channel which extends outwardly of the housing generally tangentially with respect to the side wall portions.
  • the housing defines a generally cylindrical chamber and the blade means of the impeller means substantially extends between the front and rear walls of the housing and outwardly into proximate relationship with the side wall portions thereof.
  • the walls of the housing include portions extending outwardly beyond the walls, with spacer means extending from the outwardly extending portions of the rear walls so as to space the housing from adjacent walls of the enclosure.
  • the sloped impeller is formed within the housing by the coupling of the motor to the drive shaft.
  • the impeller may be formed by the coupling of the motor to the drive shaft or it can be in the form of a blade means which couples to the motor and to the drive shaft.
  • the pump may be used by itself to carry a liquid from a vessel or container or can be used in combination with the drive shaft of a propeller for a boat to remove fumes.
  • the centrifugal pump 12 of the present invention is shown as it is mounted in relationship to a propeller drive shaft 14 within the hull of an inboard motorboat 10.
  • the drive shaft 14 is shown in Fig. 1 as extending from the propeller 20 though a transom, to the motor or engine 18.
  • a suitable bearing or stuffing box 22,22' is mounted so as to rotatably support the drive shaft 14 and pump 12.
  • the centrifugal pump 12 is being described for use with the propeller drive shaft of a conventional inboard motorboat 10, the pump 12 could be used in other environments.
  • only a single pump 12 is shown in the preferred embodiment, there may be occasions when two or more pumps would be-used in the same environment such as a boat having twin screws driven by a pair parallel drive shafts.
  • the pump 12 is essentially constructed of an impeller 38, comprising a bladed member 38A which forms a coupling with the end coupler 16A of the engine 18 and the end coupler 38 of the drive shaft 14, and a housing 28.
  • the pump housing 28 can be integral or split and composed of upper and lower sections, a circular or semicircular sidewall, a front wall and generally rectangular rear wall as found in U.S. Pat. No. 4,688,987. Openings 26, 26' are provided in the upper corners of the rear wall of the upper section and through the lower corners of the rear wall of the lower section through which mounting bolts 34 may be selectively extended.
  • the impeller blades 32 are constructed to substantially extend outwardly to a point in close proximity with the inner surfaces of the sidewalls. Additionally, the width of the blades 32 is substantially equal to but slightly less than the distance between the front and rear walls.
  • the design of the impeller 38 and pump housing 28 is such that upon rotation of the drive shaft 14, the impeller 38 will simultaneously be rotated to thereby draw air, fumes, liquids or other fluids inwardly through the opposing openings 26, 26'. Thereafter, the fluids move along the sloped surface of the impeller 38 and are discharged under pressure through the passageway in the discharge areas 23 and through the exhaust hose 24 or similar conduit to a point remote from the pump.
  • the impeller rotates within the pump housing thereby drawing fluids including liquids and gases through the inlet ports and thereafter discharging- the fluids under pressure through the outlet nozzle.
  • the centrifugal pump of the present invention will automatically function to discharge any hazardous gaseous or fluid buildup or generated due to friction and thus the pump is sa fe for use in environments where ignitable or combustible fluids or gases are encountered.
  • the impeller means 38A is shown in Fig. 3 as being a separate and single intermediate bladed member 38A having a series of steps 31 which are in mating engagement with the end member 14A of the drive shaft 14 on one side and the steps 31A of the end member 16A of the shaft 16 of the engine 18, the bladed impeller means 38A can also be integral with either end member 14A or end member 16A. Therefore, there can be a coupling to both sides of the impeller 38 within the housing or one side.
  • Fig. 4 shows the sloped coupled impeller 38 which is held together by bolts 34 or any other fastening member.
  • the slope expedites movement of the liquid from the center of the impeller to the blades 32 where it is rapidly discharged through the outlet.
  • a 30 to 45° slope on the impeller 38 is generally suitable for moving the liquid to the blades 32.
  • the pump of the invention does not require great precision in manufacture therefore it can be formed from metals such as aluminum, bronze, etc., or rigid plastics such as RYTON. (registered trade mark).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Eye Examination Apparatus (AREA)
  • Fluid-Driven Valves (AREA)
  • Sampling And Sample Adjustment (AREA)
EP92850211A 1991-10-09 1992-09-09 Pump Expired - Lifetime EP0537128B1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US861457 1986-05-09
US77351391A 1991-10-09 1991-10-09
US773513 1991-10-09
US86145792A 1992-04-01 1992-04-01

Publications (3)

Publication Number Publication Date
EP0537128A2 EP0537128A2 (en) 1993-04-14
EP0537128A3 EP0537128A3 (en) 1993-07-14
EP0537128B1 true EP0537128B1 (en) 1996-05-22

Family

ID=27118771

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92850211A Expired - Lifetime EP0537128B1 (en) 1991-10-09 1992-09-09 Pump

Country Status (11)

Country Link
EP (1) EP0537128B1 (el)
JP (1) JPH05195992A (el)
AT (1) ATE138451T1 (el)
BR (1) BR9203887A (el)
CA (1) CA2077582A1 (el)
DE (1) DE69210937T2 (el)
DK (1) DK0537128T3 (el)
ES (1) ES2087504T3 (el)
GR (1) GR3020052T3 (el)
IL (1) IL103095A (el)
NO (1) NO923869L (el)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE422200C (de) * 1919-12-29 1925-11-27 Paul Hariveau Kreiselpumpe zum Foerdern und Mischen zweier Stoffe
US2215559A (en) * 1938-05-02 1940-09-24 Fred P Morgan Irrigation pump
US3411013A (en) * 1966-04-04 1968-11-12 Roger G. Vogelsang Marine accessory drive
AU434185B2 (en) * 1968-10-18 1973-03-28 John Crbafulli Angelo Centrifugal pump
US4688987A (en) * 1985-02-22 1987-08-25 Ericson Wallace W Split impeller centrifugal pump
US5051071A (en) * 1990-02-09 1991-09-24 Haentjens Walter D Heat dissipating coupling for rotary shafts

Also Published As

Publication number Publication date
DE69210937T2 (de) 1996-10-02
BR9203887A (pt) 1993-04-27
IL103095A (en) 1996-11-14
ATE138451T1 (de) 1996-06-15
GR3020052T3 (en) 1996-08-31
NO923869L (no) 1993-04-13
DE69210937D1 (de) 1996-06-27
IL103095A0 (en) 1993-02-21
CA2077582A1 (en) 1993-04-10
JPH05195992A (ja) 1993-08-06
DK0537128T3 (da) 1996-10-14
NO923869D0 (no) 1992-10-05
EP0537128A2 (en) 1993-04-14
ES2087504T3 (es) 1996-07-16
EP0537128A3 (en) 1993-07-14

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