US3738781A - Pump unit for conveying high temperature media - Google Patents

Pump unit for conveying high temperature media Download PDF

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Publication number
US3738781A
US3738781A US00097910A US3738781DA US3738781A US 3738781 A US3738781 A US 3738781A US 00097910 A US00097910 A US 00097910A US 3738781D A US3738781D A US 3738781DA US 3738781 A US3738781 A US 3738781A
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US
United States
Prior art keywords
pump
shaft sealing
shaft
housing
pump unit
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
US00097910A
Other languages
English (en)
Inventor
Hagemann
Zimmermann
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.)
Siemen and Hinsch GmbH
Original Assignee
Siemen and Hinsch GmbH
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 Siemen and Hinsch GmbH filed Critical Siemen and Hinsch GmbH
Application granted granted Critical
Publication of US3738781A publication Critical patent/US3738781A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/02—Arrangements for cooling or ventilating by ambient air flowing through the machine
    • H02K9/04—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium
    • H02K9/06—Arrangements for cooling or ventilating by ambient air flowing through the machine having means for generating a flow of cooling medium with fans or impellers driven by the machine shaft
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/5893—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps heat insulation or conduction
    • 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
    • F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
    • 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
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/162—Special parts or details relating to lubrication or cooling of the sealing itself

Definitions

  • ABSTRACT A pump unit for conveying high temperature media having an air cooled drive motor and a centrifugal pump wherein said drive motor is mounted so as to cause cooling air to pass over the shaft sealing housing and reduce the temperature in the area of the shaft packing.
  • the shaft sealing was placed away from the pump conveyance chamber and both of them were connected with each other only through a narrow shaft slit in order thus to achieve a sufficient temperature gradient from thepump toward the packing.
  • the liquid which is between the pump and-the shaft sealing is cooled down to the desired value through heat transfer to the environment.
  • heat is given off to the environment only through radiation and natural convection of the surrounding air, then, if the temperature of the pumped medium is high, the interval between the shaft sealing and the pump must be very great, which leads to a major construction effort and very great structural length.
  • additional cooling devices can be provided, such as by special fans, which generate a cooling air stream directed at the sealing housing, or a portion of the stream can be taken from the conveying current of the pump, to be conducted through a cooling device and then fed into a slide ring packing chamber for rinsing. But such additional cooling devices are also expensive.
  • the solution according to the invention consists in the fact that there is arranged an air-cooled drive motor in a manner such that the shaft sealing housing will lie in a cooling air stream coming out of the motor. In this manner there is obtained a sufficient reduction of the temperature in the area of the shaft packing without any additional fans which in the hitherto known models resulted in a considerable expenditure.
  • a heating shield arranged between the shaft sealing housing and the centrifugal pump, if the cooling air current is aimed at the heat shield and if the shield contains a guidance device, respectively, if it is made as a guidance device, which deflects the cooling air stream from the pump.
  • the heat shield first of all, holds back the heat irradiated from the pump in the direction toward the sealing housing, and second, prevents the cooling air stream of the motor from additionally flowing also around the pump itself and producing undesired cooling. It can also be used for guiding the air streaming out as in the case of an externally cooled electric motor, at an interval from the shaft toward the shaft sealing housing which is to be cooled off. Particularly effective cooling of the shaft sealing is achieved according to the invention when the shaft sealing housing has cooling ribs.
  • the shaft packing housing is provided with lateral ribs and the guidance device guides the cooling air stream parallel to the lateral ribs toward the housing of the shaft packing.
  • the shaft packing housing with longitudinal ribs, whereby the guidance device deflects the cooling air stream after flowing around the shaft packing radially outward.
  • the heat shield as such here serves the same purpose as in the unit with the laterally-ribbed shaft sealing housing.
  • FIG. ,1 a side view of a pump unit with rib-less shaft sealing housing
  • FIGS. 2 and 3 corresponding side views with a laterally-ribbed and longitudinally-ribbed shaft packing housing.
  • pump 1 is driven by an externally-cooled electric motor 2.
  • the fan or blower lid 3 covers the motor fan which drive the cooling air inthe direction indicated by arrows.
  • Pump shaft 4 is sealed toward the outside by a shaft packing [not shown] in the shaft sealing housing 5. Between the pump shaft 4 and the surrounding housing part, there is only a narrow shaft slit between the pump and the shaft sealing housmg.
  • the embodiment according to FIG. 2 differs from the one in FIG. 1 by shaft sealing housing 5 having laterally arranged cooling ribs 6 and that between pump 1 and shaft sealing housing 5 there is a heat shield 7 which is connected with flange 10 via a poor heat-conducting connecting body 8. Also, heat shield 7 in the lower area has guidance devices 9 which deflect the cooling air flowing in from the motor laterally to the original direction of flow and guide it parallel over the lateral ribs of the sealing housing. Heat shield 7 constitutes the barrier for the heat radiated from the pump toward the housing packing and the motor and prevents the cooling air of the electric motor which sweeps over the shaft sealing from also sweeping over the pump and producing an undesired cooling effect here.
  • the heat shield 7 also causes the air, which in externally cooled electric motors flows off at a certain radial distance from the shaft, to touch the shaft sealing housing in sufficient quantity.
  • the outside diameter of cooling rib 6 increases from the motor side to the pump side.
  • the arrows designate the cooling air stream and it can be seen that the guidance of the cooling air can give an optimum cooling effect on the shaft sealing housing.
  • FIG. 3 The arrangement according to FIG. 3 is similar to that of FIGS. 1 and 2, unless otherwise indicated and to the extent that this therefore does not clearly emerge from the drawings.
  • motor 2 we are dealing with an internally cooled electric motor in which the cooling air flows inside the housing and, as indicated by the arrows, comes out of the housing nearer to the shaft than in externally cooled motors. It thus directly hits the shaft sealing housing 5 whose ribbing 6 is lined up longitudinally.
  • FIG. 1 we are dealing with an internally cooled electric motor in which the cooling air flows inside the housing and, as indicated by the arrows, comes out of the housing nearer to the shaft than in externally cooled motors. It thus directly hits the shaft sealing housing 5 whose ribbing 6 is lined up longitudinally.
  • the cooling ribs 6 of the shaft sealing housing 5 are over-flowed by the motor cooling air inthe longitudinal direction, i.e., parallel to the shaft, and the motor cooling air is evacuated radially outward only after it has flowed over the cooling ribs through the heat shield 7 which is made in the form of radial deflection device-'9.
  • a shaft sealing housing connected with the conveyor chamber of said pump being on the driving side and cooledby an air stream, said housing communicating with said conveyor chamber only by a narrow slit about the shaft said motor means having means to air-cooled the drive motor means and mounted so that said shaft sealing housing lies in the air stream coming out of said motor means, and a heat shield between said shaft sealing housing and said centrifugal pump, said shield having guidance means deflecting the air stream back toward the housing of the shaft packing away from said centrifugal pumps.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US00097910A 1969-12-23 1970-12-14 Pump unit for conveying high temperature media Expired - Lifetime US3738781A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691964474 DE1964474A1 (de) 1969-12-23 1969-12-23 Pumpe zur Foerderung von Medien mit hoher Temperatur

Publications (1)

Publication Number Publication Date
US3738781A true US3738781A (en) 1973-06-12

Family

ID=5754796

Family Applications (1)

Application Number Title Priority Date Filing Date
US00097910A Expired - Lifetime US3738781A (en) 1969-12-23 1970-12-14 Pump unit for conveying high temperature media

Country Status (13)

Country Link
US (1) US3738781A (xx)
AT (1) AT301355B (xx)
BE (1) BE760415A (xx)
CA (1) CA952762A (xx)
CH (1) CH516087A (xx)
DE (1) DE1964474A1 (xx)
FR (1) FR2074162A5 (xx)
GB (1) GB1297660A (xx)
IL (1) IL35884A (xx)
LU (1) LU62286A1 (xx)
NL (1) NL7018711A (xx)
SE (1) SE366805B (xx)
ZA (1) ZA708567B (xx)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5911565A (en) * 1995-03-06 1999-06-15 Sterling Fluid Systems (Germany) Gmbh Pump for conveying hot media
US20120034112A1 (en) * 2009-02-13 2012-02-09 Alfred Kaercher Gmbh & Co. Kg Motor pump unit
US8727748B2 (en) 2008-11-14 2014-05-20 Alfred Kaercher Gmbh & Co. Kg High-pressure cleaning device
US8920138B2 (en) 2009-02-13 2014-12-30 Alfred Kaercher Gmbh & Co. Kg Motor pump unit
US9046087B2 (en) 2009-02-13 2015-06-02 Alfred Kaercher Gmbh & Co. Kg Motor pump unit
CN109114005A (zh) * 2018-10-30 2019-01-01 江苏双达泵业股份有限公司 一种高温液下泵
US11324976B2 (en) * 2017-02-13 2022-05-10 Wechsler Engineering And Consulting Pump guard and methods of use thereof

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2630513C2 (de) * 1976-07-07 1985-11-28 Allweiler Ag, 7760 Radolfzell Kühleinrichtung für ein Pumpenaggregat
DE10120409B4 (de) * 2001-04-26 2004-02-12 Sero Pumpenfabrik Gmbh & Co. Kg Kreiselpumpe zur Förderung heißer Medien

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT114725B (de) * 1927-06-13 1929-10-25 Georg Weyland Stopfbüchsenabdichtung für heißes Speisewasser fördernde Kreiselpumpen.
US2601146A (en) * 1946-01-29 1952-06-17 Hayward Tyler & Co Ltd Means for reducing heat transfer along shafts
US2799522A (en) * 1954-01-07 1957-07-16 Mine Safety Appliances Co Shaft seal
US2864314A (en) * 1955-05-11 1958-12-16 Pacific Pumping Company High pressure, high temperature pump
FR1177354A (fr) * 1957-06-17 1959-04-23 Distrib Du Materiel Electr Tou Pompe électrique notamment pour machines à laver
US3554661A (en) * 1968-12-20 1971-01-12 Decatur Pump Co High temperature pump
US3666375A (en) * 1969-08-26 1972-05-30 Ernest H Priest Pumping a high or low temperature fluid

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT114725B (de) * 1927-06-13 1929-10-25 Georg Weyland Stopfbüchsenabdichtung für heißes Speisewasser fördernde Kreiselpumpen.
US2601146A (en) * 1946-01-29 1952-06-17 Hayward Tyler & Co Ltd Means for reducing heat transfer along shafts
US2799522A (en) * 1954-01-07 1957-07-16 Mine Safety Appliances Co Shaft seal
US2864314A (en) * 1955-05-11 1958-12-16 Pacific Pumping Company High pressure, high temperature pump
FR1177354A (fr) * 1957-06-17 1959-04-23 Distrib Du Materiel Electr Tou Pompe électrique notamment pour machines à laver
US3554661A (en) * 1968-12-20 1971-01-12 Decatur Pump Co High temperature pump
US3666375A (en) * 1969-08-26 1972-05-30 Ernest H Priest Pumping a high or low temperature fluid

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5911565A (en) * 1995-03-06 1999-06-15 Sterling Fluid Systems (Germany) Gmbh Pump for conveying hot media
US8727748B2 (en) 2008-11-14 2014-05-20 Alfred Kaercher Gmbh & Co. Kg High-pressure cleaning device
US20120034112A1 (en) * 2009-02-13 2012-02-09 Alfred Kaercher Gmbh & Co. Kg Motor pump unit
US8734129B2 (en) * 2009-02-13 2014-05-27 Alfred Kaercher Gmbh & Co. Kg Motor pump unit
US8920138B2 (en) 2009-02-13 2014-12-30 Alfred Kaercher Gmbh & Co. Kg Motor pump unit
US9046087B2 (en) 2009-02-13 2015-06-02 Alfred Kaercher Gmbh & Co. Kg Motor pump unit
US11324976B2 (en) * 2017-02-13 2022-05-10 Wechsler Engineering And Consulting Pump guard and methods of use thereof
CN109114005A (zh) * 2018-10-30 2019-01-01 江苏双达泵业股份有限公司 一种高温液下泵
CN109114005B (zh) * 2018-10-30 2024-02-13 江苏双达泵业股份有限公司 一种高温液下泵

Also Published As

Publication number Publication date
AT301355B (de) 1972-09-11
LU62286A1 (xx) 1971-05-18
CA952762A (en) 1974-08-13
DE1964474A1 (de) 1971-07-15
NL7018711A (xx) 1971-06-25
ZA708567B (en) 1972-08-30
BE760415A (fr) 1971-05-27
IL35884A0 (en) 1971-02-25
FR2074162A5 (xx) 1971-10-01
GB1297660A (xx) 1972-11-29
SE366805B (xx) 1974-05-06
IL35884A (en) 1974-07-31
CH516087A (de) 1971-11-30

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