US3722757A - Pumping device with self centering spherical seating surfaces - Google Patents

Pumping device with self centering spherical seating surfaces Download PDF

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Publication number
US3722757A
US3722757A US00067719A US3722757DA US3722757A US 3722757 A US3722757 A US 3722757A US 00067719 A US00067719 A US 00067719A US 3722757D A US3722757D A US 3722757DA US 3722757 A US3722757 A US 3722757A
Authority
US
United States
Prior art keywords
pump
unit
delivery pipe
connection
outlet connection
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
US00067719A
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English (en)
Inventor
J Dahlgren
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.)
Xylem Water Solutions AB
Original Assignee
Stenberg Flygt AB
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 Stenberg Flygt AB filed Critical Stenberg Flygt AB
Application granted granted Critical
Publication of US3722757A publication Critical patent/US3722757A/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/60—Mounting; Assembling; Disassembling
    • F04D29/605—Mounting; Assembling; Disassembling specially adapted for liquid pumps
    • F04D29/606—Mounting in cavities
    • F04D29/607—Mounting in cavities means for positioning from outside
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/26—Couplings of the quick-acting type in which the connection is made by transversely moving the parts together, with or without their subsequent rotation

Definitions

  • the pump unit having a seating while the outlet connection has a tapered aperture fitting thereto, so that the connection, after the unit has been essentially lowered, can be brought up against the coupling unit, into sealing engagement with the seating, essentially in the axial direction of the coupling unit.
  • the seating surfaces being spherical to allow for slight misalignment.
  • the invention relates to a pumping device with a pump unit irnmersible in a liquid in a well or the like and consisting of a liquidtight-enclosed motor and a centrifugal pump with outlet device leading from the pump housing, the pump unit having a guide which, on lowering and raising of the pump unit, guides the pump connection to and from the vicinity of the coupling unit of a permanently fitted outlet pipe.
  • the U.S. Pat. No. 3,018,925 describes a device of this kind, in which the flanges which connect the pump unit to the outlet pipe form an angle with a vertical plane, a catch on the connecting flange gripping across the flange of the coupling unit and so pressing the two flanges together.
  • the advantage of this is that the pump unit, in its lowered position, seals against the connecting pipe under the influence of the gravity of at least part of the pump unit. This provides a relatively good seal between pump and outlet pipe.
  • a disadvantage of these devices is that they require very narrow tolerances for clearances and angles between the flange of the outlet pipe and the axis of rotation of the pump.
  • the present invention is intended to eliminate these disadvantages and is characterized essentially in that the coupling unit of the fixed outlet pipe has a seating or the like and the outlet connection has a preferably tapered aperture fitting thereto, or vice versa, in such a way that the said connection, after the pump unit has been essentially lowered, can be brought up against the coupling unit, or vice versa, into sealing engagement with the seating, essentially in the axial direction of the coupling unit or in a direction which forms a given limited angle with the axis of the coupling unit.
  • the tapered aperture of the pump connection has a bulge-shaped edge with preferentially semicircular or semielliptical wall section, while the seating of the coupling unit is preferentially essentially conical, or vice versa.
  • a support for the pump unit in its lowered position is arranged at or close to the coupling unit, in addition to which, in the extension of the coupling unit, there is arranged at least one possibly laterally displaced stop with an inclined plane facing the coupling unit, the point of contact between the pump unit and the inclined plane of the stop being arranged to lie below an imaginary line of operation for the force of reaction generated at the pump connection and coupling unit by the pump pressure for the given area.
  • the pump unit bears against the inclined plane via at least one pin, stud, roller or the like.
  • This pin, stud, roller or the like may be arranged so as, on raising and lowering of the pump unit, to engage with the guiding device for guiding of the pump unit to and from the connection.
  • coupling unit, support, stop and inclined plane are combined in one unit, which, for example, can be placed on the bottom of a basin, cesspool or the like.
  • FIG. 1 shows the invention in schematic form, viewed from the side and partially in cross-section, the pump unit being shown with continuous lines in raised position and with broken lines in lowered position.
  • the output device is tapered and the coupling unit conical.
  • FIG. 2 shows a partial cross-sectional side view of a modification of the present invention.
  • the pump unit is in the conventional manner immersibly made up of a liquidtight-enclosed motor and a pump, preferentially a centrifugal pump. Laterally there projects from the pump housing a stub 3 with a connecting edge 8 which, viewed in cross-section, is semicircular. Pump and motor are coaxially arranged and, on the upper side of the motor on the common central axis 1, there is a suspension device in the form of an eyelet 2. The eyelet 2 need not lie on the central axis 1 even if the subsequent description assumes this position.
  • the point of gravity of the pump housing here lies, inter alia because of the connecting stub 3 projecting laterally from the pump housing, at the side of the central axis 1, to the left of it in the figure, so that the point of gravity Tp of the entire pump unit will lie outside this axis 1. Consequently, during suspension of the pump unit, i,e., when its point of gravity Tp is below the suspension eyelet 2, the central axis 1 will run slightly obliquely downwards. Owing to the eccentric position of the point of gravity Tp the pump unit, and thus also the connection 4 of the pump housing, hangs slightly obliquely, as shown by continuous lines in the'figure.
  • the suspension device can be placed, for example, further to the right, in the figure so that, when suspended, the pump unit hangs slightly obliquely, with the side facing the coupling unit 5 slightly lower.
  • the pump unit is intended to be coupled to the coupling unit 5, to the flange 6 of which the outlet pipe is intended to be connected.
  • the coupling unit 5 has an essentially conical bearing and sealing surface 7, which fits the corresponding essentially spherical bearing and sealing surface 8 of the connection 4 of the pump housing. These bearing and sealing surfaces 7, 8 are thus so designed that the pump housing can be rotated around the midpoint of the sphere without the sealing effect being thereby reduced.
  • the connection 4 of the pump housing thus becomes self-centring in the coupling unit 5.
  • connection 4 of the pump housing comes into contact with the support 9, the pump unit still hangs obliquely.
  • the lower part of the connection 4 of the pump housing is then at a slightly greater distance from the coupling unit 5 than its upper part.
  • the pump unit, at the connection 4 of the pump housing will be carried by the support 9, whereas it is not supported at the opposite side of the pump housing, i.e., on its right side in the drawing, as a result of which the pump unit is rotated in the figure clockwise around a horizontal axis and the bearing and sealing surface 8 of the pump housing thus approaches the bearing and sealing surface 7 of the coupling unit 5.
  • a pin, stud, roller 11 or the like comes up against a stop 12 connected to the coupling unit 5 through a base plate 15. This takes place on an inclined plane 13 of the stop 12 facing the coupling unit 5.
  • the point of contact 14 between the stud or the like 11 and the inclined plane 13 here lies me distance a below the now preferentially horizontal midplane of the pump housing and connecting stub 3, and therefore below the force of reaction R resulting from the pump pressure,
  • the downward directed suction aperture also contributes to an increase of the sealing force during operation of the pump.
  • the stop 12 with the inclined plane 13, the support 9 and the coupling unit 5 with coupling flange 6 are, in the embodiment described, connected together by means of a base plate 15, which can suitably be placed on the bottom of a basin, cesspool or the like, and from which the guides 10 may also proceed.
  • the invention thus provides an arrangement which is self-centering and self-.
  • a supporting member extending relatively parallel and outward from the sealing surface of the delivery pipe and below the delivery pipe, the pump outlet connection having a protruding support portion adjacent its sealing surface for engagement with the support member of the delivery pipe.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00067719A 1969-08-29 1970-08-28 Pumping device with self centering spherical seating surfaces Expired - Lifetime US3722757A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE1201869 1969-08-29

Publications (1)

Publication Number Publication Date
US3722757A true US3722757A (en) 1973-03-27

Family

ID=20295008

Family Applications (1)

Application Number Title Priority Date Filing Date
US00067719A Expired - Lifetime US3722757A (en) 1969-08-29 1970-08-28 Pumping device with self centering spherical seating surfaces

Country Status (6)

Country Link
US (1) US3722757A (de)
AT (1) AT301354B (de)
CH (1) CH519108A (de)
DE (1) DE2041983A1 (de)
FR (1) FR2059316A5 (de)
NL (1) NL7012730A (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043707A (en) * 1974-10-15 1977-08-23 Klein, Schanzlin & Becker Aktiengesellschaft Submersible motor-driven pump
US4304530A (en) * 1979-02-19 1981-12-08 Saab-Scania Aktiebolag Arrangement for attaching a tank fitting to a fuel tank
US4726742A (en) * 1986-06-12 1988-02-23 The Marley-Wylain Company Guide structure for submersible pump system
WO2006054946A1 (en) * 2004-11-22 2006-05-26 Henric Lind Pump station including a pump sump and method of mounting an outlet pipe in the pump sump
US20140010683A1 (en) * 2011-03-31 2014-01-09 Ningbo Jushen Pumps Industry Co., Ltd. Large-scale submersible sewage pump

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4043707A (en) * 1974-10-15 1977-08-23 Klein, Schanzlin & Becker Aktiengesellschaft Submersible motor-driven pump
US4304530A (en) * 1979-02-19 1981-12-08 Saab-Scania Aktiebolag Arrangement for attaching a tank fitting to a fuel tank
US4726742A (en) * 1986-06-12 1988-02-23 The Marley-Wylain Company Guide structure for submersible pump system
WO2006054946A1 (en) * 2004-11-22 2006-05-26 Henric Lind Pump station including a pump sump and method of mounting an outlet pipe in the pump sump
US20140010683A1 (en) * 2011-03-31 2014-01-09 Ningbo Jushen Pumps Industry Co., Ltd. Large-scale submersible sewage pump
US9255577B2 (en) * 2011-03-31 2016-02-09 Ningbo Jushen Pumps Industry Co., Ltd. Large-scale submersible sewage pump

Also Published As

Publication number Publication date
DE2041983A1 (de) 1971-04-29
NL7012730A (de) 1971-03-02
CH519108A (de) 1972-02-15
AT301354B (de) 1972-09-11
FR2059316A5 (de) 1971-05-28

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