US3676013A - Axial flow pump - Google Patents
Axial flow pump Download PDFInfo
- Publication number
- US3676013A US3676013A US74564A US3676013DA US3676013A US 3676013 A US3676013 A US 3676013A US 74564 A US74564 A US 74564A US 3676013D A US3676013D A US 3676013DA US 3676013 A US3676013 A US 3676013A
- Authority
- US
- United States
- Prior art keywords
- stator
- pump
- housing
- rotor
- stages
- 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
Links
Images
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
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/04—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being viscous or non-homogenous
-
- 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
- F04D1/06—Multi-stage pumps
- F04D1/063—Multi-stage pumps of the vertically split casing type
-
- 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
-
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S415/00—Rotary kinetic fluid motors or pumps
- Y10S415/901—Drilled well-type pump
Definitions
- a multi-stage axial flow pump designed to pump fluids which may contain solid particles, without jamming or damage to the working parts thereof.
- the pump comprises a plurality of stages each including a stator element and a rotor element contained within the stator element.
- the stages are located within a cylindrical housing.
- a compression type spring is located within the housing and normally urges the stator members against one another and against one end of the housing so that they remain stationary during normal operation. However, in the event a foreign particle becomes lodged between the rotor and the stator, the stator is permitted to move or shift in axial position such that the foreign particle may pass therethrough.
- the axial flow pumps of the type involved in the present invention normally includes an outer cylindrical housing having a number of stages contained therein. Each stage includes a stator element for directing and controlling the direction of the fluid flow therethrough and a rotor element which is aflixed to a shaft. -As the shaft is driven by a suitable motor, the fluid being pumped is impelled and made to pass through the stator elements. For purposes of economy, it is desirable to form the rotor and stator elements from plastic or some other inexpensive material. However, when pumps of the type described are used in an environment where they may be subjected to solid particles contained in the fluid being pumped, these particles may cause undue wear and damage to the pump unless measures are taken to accommodate the pumping of fluids containing foreign particles.
- the Schroeder Pat. 3,324,800 introduces a wear plate between the rotor and the pump housing or casing. If the material being pumped includes abrasive particles, according to the teachings of the Schroeder patent, the clearance between the wear plate and the housing is enlarged and it becomes necessary to periodically adjust the clearance to compensate for the wear.
- the present invention can be distinguished from the foregoing prior art attempts at providing for the possibility of grit or foreign particles in the fluid being pumped.
- a means for adjusting the pressure between adjacent stator stages such that when the fluid being pumped is free of foreign particles, the stator elements remain stationary and serve their normal function.
- foreign 3,676,013 Patented July 11, 1972 particles are present in the fluid being pumped, if a foreign particle tends to become lodged between the rotor and the stator element, the stator is free to shift axially to thereby permit the foreign particles to pass through the pump with little or no damage to the working parts thereof.
- this is accomplished by including a coil spring within the pump casing or housing with the spring normally urging adjacent stator elements against one another and against a shoulder within the casing. Means are provided for controlling the amount of compressive force exerted by the coil spring.
- a further object of the invention is to provide a pump wherein the stator elements are free to shift within predetermined limits in the event a foreign partcile becomes lodged between the pump rotor and the stator element.
- Casing 2 has an inlet end 4 and an outlet end 6 and in its simplest form may comprise a cylindrical pipe or tube.
- the inlet end 4 of casing 2 is internally threaded at 8 so as to accept an externally threaded end cap 10.
- the end cap 10 is provided with an aperture 12 into which the fluid to be transported is introduced.
- the pump further includes a plurality of stages indicated generally by numerals 14 and 16. While only two stages are illustrated, it should be readily apparent to those skilled in the art that additional stages may be employed to suit the particular requirements.
- Each stage is shown as including a cylindrical cup shaped stator element 18 having a plurality of vanes 20 for deflecting and directing the path of fluid flow therethrough.
- Each of the stators further has an aperture 22 passing therethrough so that a drive shaft 24 which is coaxial with the axis of the casing 2 can pass therethrough.
- a rotor member 26 Secured to the drive shaft 24 and located within the cup shaped stator elements is a rotor member 26. When the shaft is driven by a suitable power source (not shown) velocity is imparted to the fluid particles and these fluid particles are forced through the stator elements.
- a flow control element 28 Position between adjacent stages is a flow control element 28 which, in its simplest form, comprises a flat washer or disc having an outside diameter slightly less than the diameter of the casing 2 but greater than the inside diameter of the cup-shaped stator element, such that the washer rests upon the peripheral edge of the stator element as illustrated.
- the flow control elements 28 have a central aperture 30 through which the fluid being pumped is directed.
- the end cap 10 would be screwed down tightly against an adjacent flow control element 28 such that a substantial force is applied between adjacent stator stages and the stators are thereby rigidly locked in place. Should the fluid being pumped include foreign particles, these particles tend to become lodged between the rotor element 26 and an adjacent stator element 18. This can cause severe damage to the rotor and stator, which, as mentioned previously, are preferably formed from a suitable plastic material.
- the present invention provides the addition of a coil spring 32 disposed between the end cap 10 and the lowermost flow control element 28.
- a coil spring 32 disposed between the end cap 10 and the lowermost flow control element 28.
- the present invention provides an improvement for prior art pumps to allow coarse objects and sedimentary material such as sand, gravel, etc.-
- the stator can shift its position slightly by moving about its longitudinal axis. This slight motion permits the lodged object to align itself with an opening in the stator and pass through it into the next stage.
- An improved axial flow pump capable of pumping fluids containing solid particles, said pump being of the type including a cylindrical housing having an inlet port and an outlet port, at least one cylindrical cup-shaped stator member contained within said housing, a drive shaft mounted coaxially Within said housing and a rotor member mounted on said shaft and adapted to rotate within said cup-shaped stator, the improvement comprising:
- An improved multi-stage axial flow pump of the type having a cylindrical housing having an inlet end and an outlet end and wherein each stage includes a cylindrical cup-shaped stator located within said housing member and a rotor member adapted to fit within said cup-shaped portion of said stator member and adapted to be driven by a drive shaft passing through a central aperture in said stator member, and wherein the stages are separated by a flat washer member disposed between adjacent stator members, the improvement comprising:
- stator members for yieldably urging said stator members against said flat washers such that said stator members are normally stationary within said housing yet axially rotatable in the event a solid particle lodges between a rotor member and an associated stator member to free the lodged particle for movement downstream through the pump.
- Apparatus as in claim 5 wherein said last named means comprises a coil spring contained within said housing having one end abutting said flat Washer and the other end abutting an axially movable member.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US7456470A | 1970-09-23 | 1970-09-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
US3676013A true US3676013A (en) | 1972-07-11 |
Family
ID=22120244
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US74564A Expired - Lifetime US3676013A (en) | 1970-09-23 | 1970-09-23 | Axial flow pump |
Country Status (1)
Country | Link |
---|---|
US (1) | US3676013A (en) |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2618829A1 (en) * | 1976-04-29 | 1977-11-10 | Klein Schanzlin & Becker Ag | STORAGE OF A MULTI-STAGE CENTRIFUGAL PUMP |
US4120606A (en) * | 1975-10-30 | 1978-10-17 | Klein, Schanzlin & Becker Aktiengesellschaft | Submersible motor pump |
US4244675A (en) * | 1979-04-30 | 1981-01-13 | Worthington Pump, Inc. | Multi-stage barrel type centrifugal pump with resilient compensator means for maintaining the seals between interstage pumping assemblies |
US4923367A (en) * | 1988-03-14 | 1990-05-08 | Flint & Walling, Inc. | Submersible pump with plastic housing |
WO1999013932A1 (en) * | 1997-09-19 | 1999-03-25 | Respironics, Inc. | Medical ventilator |
ITVI20100071A1 (en) * | 2010-03-17 | 2011-09-18 | Calpeda A Spa | COMPRESSION DEVICE OF THE STATIC GROUP OF A PUMP |
-
1970
- 1970-09-23 US US74564A patent/US3676013A/en not_active Expired - Lifetime
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4120606A (en) * | 1975-10-30 | 1978-10-17 | Klein, Schanzlin & Becker Aktiengesellschaft | Submersible motor pump |
DE2618829A1 (en) * | 1976-04-29 | 1977-11-10 | Klein Schanzlin & Becker Ag | STORAGE OF A MULTI-STAGE CENTRIFUGAL PUMP |
US4172690A (en) * | 1976-04-29 | 1979-10-30 | Klein, Schanzlin & Becker Aktiengesellschaft | Arrangement for centering the impellers in a multi-stage centrifugal pump |
US4244675A (en) * | 1979-04-30 | 1981-01-13 | Worthington Pump, Inc. | Multi-stage barrel type centrifugal pump with resilient compensator means for maintaining the seals between interstage pumping assemblies |
US4923367A (en) * | 1988-03-14 | 1990-05-08 | Flint & Walling, Inc. | Submersible pump with plastic housing |
WO1999013932A1 (en) * | 1997-09-19 | 1999-03-25 | Respironics, Inc. | Medical ventilator |
US6543449B1 (en) | 1997-09-19 | 2003-04-08 | Respironics, Inc. | Medical ventilator |
ITVI20100071A1 (en) * | 2010-03-17 | 2011-09-18 | Calpeda A Spa | COMPRESSION DEVICE OF THE STATIC GROUP OF A PUMP |
EP2366904A1 (en) * | 2010-03-17 | 2011-09-21 | CALPEDA S.p.A. | Compression device for the stator unit of a pump |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: NEMER, BRUCE A. RECEIVER, MINNESOTA Free format text: CERTIFIED COPY OF ORDER FILED IN THE DISTRICT COURT, HENNEPIN COUNTY MN, APPOINTING ASSIGNEE AS RECEIVER FOR ASSIGNEE ON NOV. 10, 1982;ASSIGNORS:DYNA-TEK CORPORATION;MCPEAK, DOUGLAS H.;ALBERTSON, ROBERT V.;REEL/FRAME:004086/0795 Effective date: 19821110 Owner name: NEMER, BRUCE A. RECEIVER Free format text: CERTIFIED COPY OF ORDER FILED IN THE DISTRICT COURT, HENNEPIN COUNTY MN, APPOINTING ASSIGNEE AS RECEIVER FOR ASSIGNEE ON NOV. 10, 1982.;ASSIGNORS:DYNA-TEK CORPORATION;MCPEAK, DOUGLAS H.;ALBERTSON, ROBERT V.;REEL/FRAME:004086/0795 Effective date: 19821110 |
|
PA | Patent available for licence or sale | ||
STCF | Information on status: patent grant |
Free format text: PATENTED FILE - (OLD CASE ADDED FOR FILE TRACKING PURPOSES) |
|
AS | Assignment |
Owner name: BURD, BARTZ & GUTENKAUF 1300 FOSHAY TOWER MINNEAPO Free format text: SECURITY INTEREST;ASSIGNOR:ALBERTSON, ROBERT V.;REEL/FRAME:004502/0616 Effective date: 19860103 |