US3473475A - Electromotor-driven oil pump - Google Patents

Electromotor-driven oil pump Download PDF

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Publication number
US3473475A
US3473475A US678099A US3473475DA US3473475A US 3473475 A US3473475 A US 3473475A US 678099 A US678099 A US 678099A US 3473475D A US3473475D A US 3473475DA US 3473475 A US3473475 A US 3473475A
Authority
US
United States
Prior art keywords
motor
pump
oil
shaft
housing
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
US678099A
Other languages
English (en)
Inventor
Paul Martini
Theodor Nocon
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.)
Licentia Patent Verwaltungs GmbH
Original Assignee
Licentia Patent Verwaltungs 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 Licentia Patent Verwaltungs GmbH filed Critical Licentia Patent Verwaltungs GmbH
Application granted granted Critical
Publication of US3473475A publication Critical patent/US3473475A/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
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/14—Structural association with mechanical loads, e.g. with hand-held machine tools or fans
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/083—Structural association with bearings radially supporting the rotary shaft at both ends of the rotor
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K7/00—Arrangements for handling mechanical energy structurally associated with dynamo-electric machines, e.g. structural association with mechanical driving motors or auxiliary dynamo-electric machines
    • H02K7/08—Structural association with bearings
    • H02K7/085—Structural association with bearings radially supporting the rotary shaft at only one end of the rotor

Definitions

  • the present invention relates to electric motor-driven oil pumps, and particularly to pumps for use in oil bumers for the feeding and atomizing of the heating oil.
  • oil pumps have heretofore generally been constructed in the form of geared pumps. It is known that the drive shaft of such a pump must be disposed on the pump housing in an accurately centered position because unduly large tolerances and great deviations from center will result in greater play of the intermeshing gears and will thus impair the effectiveness of the pumping action. Additionally, the motor shaft must be centered in the motor housing to close tolerances so that the air gap will be kept at a minimum in order to attain a high rated output.
  • This arrangement has the advantage, on the one hand, of eliminating the need for a coupling and thus avoiding the expenditures for subsequently assembling the pump and motor and, on the other hand, of requiring only two bearings rather than the four bearings previously employed.
  • Another object of the present invention is to enable the common shaft to be accurately aligned in both the pump housing and the motor housing.
  • Yet another object of the present invention is to permit such alignment to be accomplished in a simple and efiicient manner.
  • a still further object of the present invention is to simplify the installation of such a geared oil pump assembly.
  • a geared oil pump for feeding fuel oil for atomization in an oil burner installation, an electric motor for driving the pump, a rigid shaft member connected between the rotary portions of the motor and the pump and constituting both the motor output shaft and the pump drive shaft, and shaft bearing means composed of only two bearings supporting the shaft member and constituting the sole support therefor, by the improvement composed of a common support housing for both the motor and the pump, the housing directly supporting both of the bearings.
  • FIGURE 1 is a cross-sectional view of an electric motor-driven oil pump according to the present invention in which one bearing is disposed in the motor and the other bearings is disposed in the pump, the pump and the motor having a common housing member.
  • FIGURE 2 is a similar View wherein both bearings are disposed in the motor and the pump housing is centered in a bearing plate of the motor.
  • FIGURE 3 is a similar view of a hermetically closed structural unit in which the motor interior is not sealed against the entrance of pump oil, the motor is of the external rotor type, and both bearings are disposed in the pump housing.
  • FIGURE 1 shows an arrangement in which a pump housing 2 is closed by a cover 1 and is simultaneously constructed to be the bearing plate 3 of an electric drive motor 4.
  • a sleeve bearing 5 is disposed in the pump housing 2 and a ball bearing 6 is disposed in a flange bearing plate 7 for the motor, which plate is at the opposite end of the motor from plate 3.
  • the sleeve bearing 5 is lubricated by the oil pumped by the oil pump disposed in housing 2.
  • the motor and pump have a common shaft 8 and the motor interior is sealed, at the shaft 8, by a sealing member 9 which prevents the entrance of oil into the motor.
  • the free shaft end 10 is provided for the connection of an additional piece of equipment, for example, a blower wheel for oil burner assemblies.
  • the bearings 5 and 6 and the sealing member 9 may be con- 3 stituted by any well-known, commercially available components.
  • the bearing 5 of FIGURE 1 is, in effect, replaced by a ball bearing 11 which is here disposed in the motor bearing plate 3 at the end adjacent to the pump, while fiange plate 7 carrying bearing 6 is connected to, and forms a part of, plate 3.
  • the sealing member 9 is disposed in front of both bearings so as to be between the pump and the motor.
  • the bearing plate 3 of the motor 4 and the pump housing 2 are constructed as separate structural components and are firmly and rigidly connected to each other by means of a centering fitting 12 such that the motor and pump are centered along the axis of shaft 8.
  • the elements 2 and 3 could, of course, be of one piece as shown in FIGURE 1.
  • both bearings 5 and 13 are housed in the extended neck 14 of the pump housing 2.
  • the starting motor including the internal stator 15, the one-piece shaft 8", and the cup-shaped external rotor 16, is disposed in an area which is sealed by the sealing ring 17 and closed hood 1-8 against the entrance of oil from the outside.
  • the pump housing 2 is provided with either suction or discharge openings communicating with the motor interior.
  • the internal stator of the external rotor-type motor can be very easily force-fitted onto the extended neck 14 of the pump housing 2.
  • a rigid attachment can be achieved in any manner desired, for example, by glueing or by a pressure fit.
  • the supporting flange 19 of the external rotor 16 is preferably constructed in the form of a closed cup having a smooth surface in order to avoid friction losses with the oil in the motor interior.
  • Either the oil may flow from the suction line through the opening 20 of the sheet metal hood 18, through the motor interior and then through the opening 21 into the pump housing 2, or the opening 20 of the sheet metal hood may be connected to the oil discharge line. Then the oil is pressed out of the opening 21 of the pump housing 2 into the motor interior and leaves the motor by the opening 20.
  • the common shaft can advantageously be made of one piece. It ispossible, however, to firmly fit the pump shaft into the motor shaft. Either form of construction can be employed for the embodiments of FIGURES 1 and 2.
  • the two bearings can be arranged in different ways.
  • the bearings can be disposed to respectively opposite sides of the motor rotor and the bearing adjacent the pump can be provided with a seal in the region between the pump and the motor to prevent oil from penetrating into the motor.
  • the additional components of the geared pump can be installed after assembly of the motor portion, the motor being operative even before the pump components have been so installed.
  • This cooling effect can be advantageously augmented if the oil pumped by the pump is caused to flow completely through the motor.
  • the motor should be enclosed in a pressure-tight casing.
  • the encapsulation can be realized, as shown in FIGURE 3, by a sheet metal cover which is pulled over the motor like a hood and which is fastened to the pump housing on one side via a sealing ring.
  • an oil pumping unit including a geared oil pump for feeding fuel oil for atomization in an oil burner installation, an electric motor for driving the pump, a rigid shaft member connected between the rotary portions of the motor and the pump and constituting both the motor output shaft and the pump drive shaft, and shaft bearing means composed of only two bearings supporting the shaft member and constituting the sole support therefor, the improvement comprising a common support housing for both said motor and said pump, said housing directly supporting both of said bearings.
  • An arrangement as defined in claim 1 further comprising a hermetically sealed enclosure enclosing both said motor and said pump and preventing the leakage of oil, and wherein said pump and said motor are in communication for premitting the passage of oil being pumped through the interior of said motor and the motor windings.
  • said enclosure includes a sheet metal cover enclosing said motor and fastened to said housing, and a sealing ring disposed between said cover and said housing for sealing the interior of said motor.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Rotary Pumps (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
US678099A 1966-10-25 1967-10-25 Electromotor-driven oil pump Expired - Lifetime US3473475A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEL0054898 1966-10-25

Publications (1)

Publication Number Publication Date
US3473475A true US3473475A (en) 1969-10-21

Family

ID=7276530

Family Applications (1)

Application Number Title Priority Date Filing Date
US678099A Expired - Lifetime US3473475A (en) 1966-10-25 1967-10-25 Electromotor-driven oil pump

Country Status (7)

Country Link
US (1) US3473475A (de)
BE (1) BE705303A (de)
DE (1) DE1553116B2 (de)
DK (1) DK122681B (de)
GB (1) GB1198685A (de)
NL (1) NL6714195A (de)
SE (1) SE338638B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3237967A1 (de) * 1982-10-13 1984-04-19 Allweiler Ag, 7760 Radolfzell Motorpumpenaggregat
US4525126A (en) * 1982-03-04 1985-06-25 Hydroperfect International H. P. I. Electro-hydraulic unit for steering, braking, suspension and like devices for vehicles
WO1991011050A1 (de) * 1990-01-18 1991-07-25 Siemens Aktiengesellschaft Elektrische maschine mit regelbarer drehzahl
WO1992018774A1 (de) * 1991-04-10 1992-10-29 Magnet-Motor Gesellschaft Für Magnetmotorische Technik Mbh Fluidpumpe
US6499966B1 (en) * 1998-08-06 2002-12-31 Automative Motion Technology, Ltd. Motor driven pump
CN103573629A (zh) * 2012-08-02 2014-02-12 株式会社神户制钢所 电动压缩机
US20150128616A1 (en) * 2012-07-27 2015-05-14 Pressure Wave Systems Gmbh Compressor for a Cooling Device and a Refrigeration Machine

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1572435A (en) * 1977-06-04 1980-07-30 Gillette Co Dc electric motors
DE2938276A1 (de) * 1979-09-21 1981-04-09 Robert Bosch Gmbh, 7000 Stuttgart Fluegelzellenverdichter
DE69533291T2 (de) * 1994-11-07 2005-08-25 Dana Automotive Ltd. Einheit mit Drehkolbenpumpe und Motor
DE19543533C2 (de) * 1995-11-22 1998-10-08 Solvis Solarsysteme Gmbh Solaranlage mit Zahnradpumpe
GB9817155D0 (en) * 1998-08-06 1998-10-07 Automotive Motion Tech Ltd Screw pump
DE10354312A1 (de) * 2003-11-20 2005-06-23 Voith Turbo Gmbh & Co. Kg Pumpenaggregat mit einer Zahnradpumpe und einem Elektromotor
DE102011001394B4 (de) * 2011-03-18 2015-04-16 Halla Visteon Climate Control Corporation 95 Elektrisch angetriebener Kältemittelverdichter

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1347732A (en) * 1919-03-25 1920-07-27 Cooper Thomas Lancelot Reed Combined motor-pump
US1405959A (en) * 1920-06-14 1922-02-07 Herbert J Woock Pump and motor unit
US2928961A (en) * 1956-01-18 1960-03-15 Wayne J Morrill Pump motor mounting
US2945362A (en) * 1957-05-06 1960-07-19 Gen Motors Corp Air conditioner
US3151567A (en) * 1962-02-02 1964-10-06 Bendix Corp Roller vane pump
US3211365A (en) * 1961-10-16 1965-10-12 Copeland Refrigeration Corp Compressor structure
US3292549A (en) * 1964-02-11 1966-12-20 Renwick Wilton & Dobson Ltd Motor driven pumps
US3303788A (en) * 1964-02-25 1967-02-14 Hydrolec S A Rotary machines
US3333544A (en) * 1965-03-22 1967-08-01 Vincent K Smith Water pump motor constructions
US3368492A (en) * 1966-01-20 1968-02-13 Robert J. Seyler External armature bias and sealing means for motor pump unit

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1347732A (en) * 1919-03-25 1920-07-27 Cooper Thomas Lancelot Reed Combined motor-pump
US1405959A (en) * 1920-06-14 1922-02-07 Herbert J Woock Pump and motor unit
US2928961A (en) * 1956-01-18 1960-03-15 Wayne J Morrill Pump motor mounting
US2945362A (en) * 1957-05-06 1960-07-19 Gen Motors Corp Air conditioner
US3211365A (en) * 1961-10-16 1965-10-12 Copeland Refrigeration Corp Compressor structure
US3151567A (en) * 1962-02-02 1964-10-06 Bendix Corp Roller vane pump
US3292549A (en) * 1964-02-11 1966-12-20 Renwick Wilton & Dobson Ltd Motor driven pumps
US3303788A (en) * 1964-02-25 1967-02-14 Hydrolec S A Rotary machines
US3333544A (en) * 1965-03-22 1967-08-01 Vincent K Smith Water pump motor constructions
US3368492A (en) * 1966-01-20 1968-02-13 Robert J. Seyler External armature bias and sealing means for motor pump unit

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4525126A (en) * 1982-03-04 1985-06-25 Hydroperfect International H. P. I. Electro-hydraulic unit for steering, braking, suspension and like devices for vehicles
DE3237967A1 (de) * 1982-10-13 1984-04-19 Allweiler Ag, 7760 Radolfzell Motorpumpenaggregat
WO1991011050A1 (de) * 1990-01-18 1991-07-25 Siemens Aktiengesellschaft Elektrische maschine mit regelbarer drehzahl
WO1992018774A1 (de) * 1991-04-10 1992-10-29 Magnet-Motor Gesellschaft Für Magnetmotorische Technik Mbh Fluidpumpe
US5478222A (en) * 1991-04-10 1995-12-26 Heidelberg; Goetz Fluid pump having a pressure sealed motor chamber
US6499966B1 (en) * 1998-08-06 2002-12-31 Automative Motion Technology, Ltd. Motor driven pump
US20150128616A1 (en) * 2012-07-27 2015-05-14 Pressure Wave Systems Gmbh Compressor for a Cooling Device and a Refrigeration Machine
US11231029B2 (en) * 2012-07-27 2022-01-25 Pressure Wave Systems Gmbh Compressor for a cooling device and a refrigeration machine
CN103573629A (zh) * 2012-08-02 2014-02-12 株式会社神户制钢所 电动压缩机
CN103573629B (zh) * 2012-08-02 2016-02-24 株式会社神户制钢所 电动压缩机

Also Published As

Publication number Publication date
SE338638B (de) 1971-09-13
NL6714195A (de) 1968-04-26
DE1553116A1 (de) 1970-07-23
DE1553116B2 (de) 1971-07-15
GB1198685A (en) 1970-07-15
BE705303A (de) 1968-03-01
DK122681B (da) 1972-03-27

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