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WO1993018303A1 - Pompe entrainee par un moteur electrique immerge - Google Patents

Pompe entrainee par un moteur electrique immerge Download PDF

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Publication number
WO1993018303A1
WO1993018303A1 PCT/US1993/002340 US9302340W WO9318303A1 WO 1993018303 A1 WO1993018303 A1 WO 1993018303A1 US 9302340 W US9302340 W US 9302340W WO 9318303 A1 WO9318303 A1 WO 9318303A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
electric motor
cavity
wet electric
recited
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.)
Ceased
Application number
PCT/US1993/002340
Other languages
English (en)
Inventor
Kim L. Coakley
Elmer F. Ward
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.)
Pneumo Abex Corp
Original Assignee
Pneumo Abex 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 Pneumo Abex Corp filed Critical Pneumo Abex Corp
Publication of WO1993018303A1 publication Critical patent/WO1993018303A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B23/00—Pumping installations or systems
    • F04B23/04—Combinations of two or more pumps
    • F04B23/08—Combinations of two or more pumps the pumps being of different types
    • F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
    • F04B23/106—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being an axial piston pump
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0096—Heating; Cooling
    • 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
    • F04D29/06—Lubrication
    • F04D29/061—Lubrication especially adapted for liquid 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine

Definitions

  • the invention is in the field of fluid power units. More particularly, the invention relates to "wet" electric motor driven pumps.
  • Electric motor driven pumps are used to convert electric power into mechanical power by circulating fluid.
  • a typical application of electric motor driven pumps is hydraulic power units that are commonly used to provide primary power or emergency or assistive power to an aircraft hydraulic system.
  • One type of hydraulic power unit that is typically used to provide emergency or assistive power to an aircraft hydraulic system is an electric motor driven hydraulic pump.
  • Prior art electric motor driven hydraulic pumps have typically been of two types, the "dry” type unit and the "wet" type unit.
  • a dry electric motor driven hydraulic pump is configured such that the components of the electric motor portion of the unit, such as the rotor, stator, windings and usually some of the bearings which support the rotor, are surrounded by air.
  • the electric motor of the dry type unit is either "air cooled” or "jacket cooled”.
  • the electric motor of the air cooled variety is cooled by circulating air through the casing in which the electric motor- components are located.
  • An example of an air cooled electric motor unit is disclosed in United States Patent No. 3,612,726 issued October 12, 1971 to Yowell.
  • the electric motor of the jacket cooled variety is cooled by reducing the temperature of the air which is located within the electric motor casing by using a heat exchanger or cooling jacket.
  • An example of a jacket cooled electric motor unit is the Vickers fluid-cooled AC motor pump, model no. MPEV3-056.
  • a wet electric motor driven hydraulic pump is configured such that the electric motor components, such as the rotor, stator and windings, the high pressure hydraulic pump and internal flow pumps, if any, and the associated bearings which support these components are submerged in circulating hydraulic fluid which lubricates and cools these components.
  • Prior art wet electric motor driven hydraulic pumps are generally configured such that one or more electric motors drive one or more high pressure hydraulic pumps.
  • the electric motor and hydraulic pump are integrated in a single housing, and in other prior art configurations the electric motor and hydraulic pump are modular and contained in separate housings wherein the hydraulic fluid circulates through both housings.
  • Such prior art configurations include an in-line modular single pump/single motor configuration, such as the Pneu o Abex Corporation, Aerospace Division, AC Motor Pump model no. PMP 3V-3; an in-line integrated single pump/single motor configuration, such as the Pneumo Abex Corporation, Aerospace Division, AC Motor Pump model no. PMP 2V-7; and two pumps integrated into the motor rotors of two motors configuration, such as the Vickers Integrated Motorpump model no. MPEV3-040-2, which is the commercial embodiment of the invention disclosed in United States Patent No. 4,729,717 issued March 8, 1988 to Gupta.
  • a common feature of the prior art wet electric motor driven hydraulic pumps is the flow of substantially all the volume of the hydraulic fluid through the electric motor as a coolant and lubricant of the electric motor before theizid is pumped by the high pressure hydraulic pump out of the unit as high pressure discharge or is pumped by internal flow pumps through and out of the unit as an auxiliary flow.
  • a large volume of hydraulic fluid at a relatively high flow rate must pass through the electric motor cavity.
  • hydraulic fluid must pass through the clearance gap between the rotor and stator, which in some designs is as small as ten thousandths of an inch.
  • one or more relatively large bypass ports through which hydraulic fluid flows are required around the stator. Because the ratio of the cross-section areas of the large bypass ports to the cross-section area of the clearance gap between the rotor and stator is large, when the high pressure hydraulic pump is discharging little or no flow, the majority of the hydraulic fluid passes through the large bypass ports and not through the clearance gap between the rotor and stator. Therefore, optimum cooling of the electric motor is not achieved.
  • a final objective of the invention is to provide an electric motor driven pump in which the electric motor operates at a higher efficiency at low operating temperatures.
  • a wet electric motor driven pump comprises a main pump, pumping a specified working fluid, which is driven by a wet electric motor, operating submerged in the specified working fluid, and a means for bleeding, •prior to entry into the main pump, a portion of the specified working fluid from the total flow of specified working fluid entering the wet electric motor driven pump to form an auxiliary fluid flow, which auxiliary fluid flow is substantially all of the fluid in which the wet electric motor operates and substantially all of the fluid which cools the wet electric motor.
  • a main pump pumping a specified working fluid, which is driven by a wet electric motor, operating submerged in the specified working fluid, and a means for bleeding, •prior to entry into the main pump, a portion of the specified working fluid from the total flow of specified working fluid entering the wet electric motor driven pump to form an auxiliary fluid flow, which auxiliary fluid flow is substantially all of the fluid in which the wet electric motor operates and substantially all of the fluid which cools the wet electric motor.
  • a wet electric motor driven pump comprises a wet electric motor which is connected to drive a main pump which pumps a specified working fluid, preferably through a drive shaft in an in-line configuration.
  • the wet electric motor is an AC induction motor and the main pump is an axial piston pump.
  • the wet electric motor, drive shaft, main pump and other necessary components of the wet electric motor driven pump are preferably integrated and mounted in a common housing. Within the common housing there is a first cavity which house.s the wet electric motor and a second cavity which houses the main pump.
  • the first cavity and second cavity are connected by at least one passage through which an auxiliary fluid flow may pass.
  • a hydrodynamic pump associated with the main pump to prevent cavitation of the main pump
  • at least one additional hydrostatic pump which is associated with the first cavity and the second cavity and to pump the auxiliary fluid flow through the first cavity and second cavity to cool the wet electric motor and lubricate the main pump, wet electric motor and additional hydrostatic pump.
  • a total volume of the specified working fluid flows into the housing through a housing inlet and then flows through a passage to a main pump inlet.
  • a bypass passage Prior to the main pump inlet, there is a bypass passage which allows a portion of the total volume of the specified working fluid to flow into the first cavity and second cavity to form an auxiliary flow which is of sufficient quantity to lubricate and cool the wet electric motor and meet an auxiliary fluid flow specification of the wet electric motor driven pump.
  • the portion of the hydraulic fluid which is not bypassed as the auxiliary fluid flow goes into the main pump inlet and is substantially expelled through a main pump outlet, through a high pressure exit passage and out a high pressure housing outlet.
  • a high pressure exit passage there may be a flow-through attenuator.
  • At least one hydrostatic pump may be associated with the first cavity or second cavity, or both, to induce a uniform flow of fluid through the first and second cavities and expulsion of the auxiliary fluid flow through an auxiliary flow outlet at the wet electric motor driven pump auxiliary flow pressure and flow specification. Fluid seepage from the main pump is collected in the first cavity and joins the auxiliary fluid flow.
  • the hydrostatic pump and additional hydr ⁇ dynamic pump may be associated with the first cavity and second cavity in different configurations and, therefor, may pressurize the first cavity and second cavity in different configurations.
  • Three preferred pressure configurations are: both first cavity and second cavity at auxiliary flow pressure; first cavity at main pump inlet pressure and second cavity at auxiliary flow pressure; or both first cavity and second cavity at main inlet pressure.
  • THE DRAWING Fig. 1 is a longitudinal sectional view of a wet motor driven pump illustrating the invention in the first cavity and second cavity at auxiliary flow pressure configuration.
  • Fig. 2 is a longitudinal sectional view of a wet motor driven pump illustrating the invention in the first cavity at main pump inlet pressure and second cavity at auxiliary flow pressure configuration.
  • Fig. 3 is a longitudinal sectional view of a wet motor driven pump illustrating the invention in the first cavity and second cavity at main pump inlet pressure configuration.
  • Fig. 1 illustrates an embodiment of the invention in which both first cavity 15, which houses variable high pressure hydraulic pump 11, and second cavity 16, which houses electric motor 12, are at auxiliary flow pressure.
  • Fig. 2 illustrates an embodiment of the invention in which first cavity 45, which houses variable high pressure hydraulic pump 41, is at variable high pressure hydraulic pump inlet pressure and second cavity 46, which houses electric motor 42, is at auxiliary flow pressure.
  • Fig. 3 illustrates an embodiment of the invention in which both first cavity 75, which houses variable high pressure hydraulic pump 71, and second cavity 76, which houses electric motor 72, are at variable high pressure hydraulic pump inlet pressure.
  • the different embodiments of the invention illustrated in Fig. 1, Fig. 2 and Fig. 3 are accomplished by the relative placement of the various internal pumping means which are associated with first and second cavities.
  • a wet electric motor driven hydraulic pump 10 comprises a variable high pressure hydraulic pump 11 which is connected to and driven by an electric motor 12 through drive shaft 13.
  • variable high pressure hydraulic pump 11 is a hydraulic axial piston pump and electric motor 12 is a wet AC induction motor.
  • Variable high pressure hydraulic pump 11, Electric motor 12, and drive shaft 13 are mounted in common housing 14.
  • first cavity 15 which houses variable high pressure hydraulic pump 11 and a second cavity 16 which houses electric motor 12.
  • First cavity 15 and second cavity 16 communicate with each other by passages 17 through which hydraulic fluid may circulate and communicate by passage 18 through which drive shaft 13 extends and is supported in passage 18 by ball bearing 19.
  • Variable high pressure hydraulic pump 11 is supported in cavity 15 by roller bearing 20.
  • Electric motor 12 comprises stator 21 which is attached to the inside of second cavity 16, and rotor 22 which is attached to drive shaft 13.
  • Rotor 22 is supported within stator 21 and within second cavity 16 by ball bearing 19 and ball bearing 23 which support drive shaft 13.
  • the clearance between rotor 22 and stator 21 forms a cylindrical passage 24 around rotor 22 through which hydraulic fluid may flow.
  • a plurality of axial passages 25 located around the outside of stator 21 are a plurality of axial passages 25 through which hydraulic fluid may also flow.
  • the clearance between rotor 22 and stator 21 which forms cylindrical passage 24 is sized to maximize the operating parameters of electric motor 12, and then the size, number and radial placement of axial passages 25 are determined relative to the size of cylindrical passage 24 such that the hydraulic fluid flow through cylindrical passage 24 and axial passages 25 provides uniform cooling of electric motor 12 and meets the auxiliary flow pressure and flow specifications of electric motor driven hydraulic pump 10.
  • hydrodynamic pump 28 is an inlet inducer- impeller, as taught by United States Patent No. 4,281,971 issued August 4, 1981 to Kouns.
  • variable high pressure hydraulic pump 11 After passing through variable high pressure hydraulic pump 11, the hydraulic fluid is expelled from electric motor driven hydraulic pump 10 through variable high pressure hydraulic pump outlet 31, through a high pressure exit passage 32 and out a high pressure housing outlet 33.
  • the hydraulic fluid may flow through a flow-through attenuator, which is not shown, that substantially reduces the pumping ripple effect of variable high pressure hydraulic pump 11.
  • auxiliary flow of hydraulic fluid consisting of a portion of the working hydraulic fluid flow is bled from the working hydraulic fluid flow through bypass passage 34.
  • the auxiliary flow may be bled off either prior to its entry into hydrodynamic pump 28, as illustrated, or after its exit from hydrodynamic pump 28.
  • the auxiliary flow then passes through hydrostatic pump 35 and is pressurized to the auxiliary flow pressure and flow specifications of electric motor driven hydraulic pump
  • hydrostatic pump 35 is a gerotor which is driven by electric motor 12 through drive shaft 13.
  • the auxiliary flow passes through and lubricates bearing 23 into the portion of second cavity 16 located to the right of electric motor 12.
  • the auxiliary flow then passes through cylindrical passage 24 and axial passages 25 into the portion of second cavity 16 located to the left of electric motor 12.
  • the electric motor 12 is cooled.
  • the auxiliary flow mixes with hydraulic fluid seepage from variable high pressure hydraulic pump 11.
  • Hydraulic fluid seepage from variable high pressure hydraulic pump 11 circulates through first cavity 15, where it lubricates roller bearing 20 and variable high pressure hydraulic pump 11, and through passages 17 and passage 18, where it lubricates ball bearing 19, and into the portion of second cavity 16 located to the left of electric motor 12.
  • the auxiliary flow is then discharged from electric motor driven hydraulic pump 10 through auxiliary flow outlet 36 at the auxiliary flow and pressure specifications of electric motor driven hydraulic pump 10.
  • a wet electric motor driven hydraulic pump 40 comprises a variable high pressure hydraulic pump 41 which is connected to and driven by an electric motor 42 through drive shaft 43.
  • variable high pressure hydraulic pump 41 is an axial piston pump and electric motor 42 is a wet AC induction motor.
  • Variable high pressure hydraulic pump 41, electric motor 42, and drive shaft 43 are mounted in common housing 44.
  • first cavity 45 which houses variable high pressure hydraulic pump 41
  • second cavity 46 which houses electric motor 42.
  • Variable high pressure hydraulic pump 41 is supported in first cavity 45 by roller bearing 47.
  • First cavity 45 and second cavity 46 communicate with each other through hydrostatic pump 48 through which hydraulic fluid is pumped.
  • Drive shaft 43 is supported in second cavity 46 by roller bearing 49.
  • Electric motor 42 comprises stator 50 which is attached to the inside of second cavity 46, and rotor 51 which is attached to drive shaft 43.
  • Rotor 51 is supported within stator 50 and within second cavity 46 by ball bearing 52 and roller bearing 49.
  • Roller bearing 49 also supports drive shaft 43 and hydrostatic pump 48.
  • Hydrostatic pump 48 is located within first cavity 45 and attached to housing 44 with screws 53. The portion of second cavity 46 located to the right of electric motor 42 communicates with the exit port of hydrostatic pump 48 through roller bearing 49 and passages 54.
  • the clearance between rotor 51 and stator 50 forms a cylindrical passage 55 around rotor 51 through which hydraulic fluid may flow. Additionally, located around the outside of stator 50 are a plurality of axial passages 56 through which hydraulic fluid may also flow.
  • the clearance between rotor 51 and stator 50 which forms cylindrical passage 55 is sized to maximize the operating parameters of electric motor 42, and then the size, number and radial placement of axial passages 56 ar.e determined relative to the size of cylindrical passage 55 such that the hydraulic fluid flow through cylindrical passage 55 and axial passages 56 provides uniform cooling of electric motor 42 and meets the auxiliary flow pressure and flow specifications of electric motor driven hydraulic pump 40.
  • hydrodynamic pump 59 is an inlet inducer-impeller, as taught by United States Patent No. 4,591,971 issued August 4, 1981 to Kouns.
  • variable high pressure hydraulic pump 41 After passing through variable high pressure hydraulic pump 41, the hydraulic fluid is expelled from electric motor driven hydraulic pump 40 through variable high pressure hydraulic pump outlet 62, through a high pressure exit passage 63 and out a high pressure housing outlet 64.
  • the hydraulic fluid may flow through a flow-through attenuator 65 which substantially reduces the pumping ripple effect of variable high pressure hydraulic pump 41.
  • An auxiliary flow of hydraulic fluid consisting of portion of the working hydraulic fluid flow sufficient to meet the auxiliary flow pressure and flow specifications of electric motor driven hydraulic pump 40 is bled from inducer passage 60 through bypass passage 66 into first cavity 45 at variable high pressure hydraulic pump inlet pressure.
  • This auxiliary flow then passes through first cavity 45, where it combines with hydraulic fluid seepage from .variable high pressure hydraulic pump 41 and lubricates variable high pressure hydraulic pump 41 and roller bearing 47, and into hydrostatic pump 48.
  • hydrostatic pump 48 is a gerotor which is driven by electric motor 42 through drive shaft 43.
  • the auxiliary flow is then expelled from hydrostatic pump 48, pressurized to the auxiliary flow pressure and flow specifications of electric motor driven hydraulic pump 40, through passages 54 and roller bearing 49 into the portion of second cavity 46 located to the right of electric motor 42.
  • roller bearing 49 roller bearing 49 is lubricated.
  • the auxiliary flow then passes through cylindrical passage 55 and axial passages 56 into the portion of second cavity 46 located to the left of electric motor 42.
  • the electric motor 42 is cooled and roller bearing 49 and ball bearing 52 are lubricated.
  • auxiliary flow then passes from second cavity 46 through auxiliary flow discharge passage 67 and is then discharged from electric motor driven hydraulic pump 40 through auxiliary flow outlet 68 at the auxiliary flow and pressure specifications of electric motor driven hydraulic pump 40.
  • a wet electric motor driven hydraulic pump 70 comprises a variable high pressure hydraulic pump 71 which is connected to and driven by an electric motor 72 through drive shaft 73.
  • variable high pressure hydraulic pump 71 is a hydraulic axial piston pump and electric motor 72 is a wet AC induction motor.
  • Variable high pressure hydraulic pump 71, Electric motor 72, and drive shaft 73 are mounted in common housing 74.
  • first cavity 75 which houses variable high pressure hydraulic pump 71
  • second cavity 76 which houses electric motor 72.
  • First cavity 75 and second cavity 76 communicate with each other through passage 77, through which drive shaft 73 extends, and through second hydrodynamic pump 78.
  • Second hydrodynamic pump 78 also receives hydraulic fluid from first cavity 75 through hydrodynamic pump inlet 79 and discharges hydraulic fluid into second cavity 76 through hydrodynamic pump outlet 80.
  • Drive shaft 73 is supported in passage 77 by ball bearing 81 that is lubricated by the hydraulic fluid which may flow through passage 77.
  • Variable high pressure hydraulic pump 71 is supported in cavity 75 by roller bearing 82.
  • Electric motor 72 comprises stator 83 which is attached to the inside of second cavity 76, and rotor 84 which is attached to drive shaft 73.
  • Rotor 84 is supported within stator 83 and within second cavity 76 by ball bearing 81 and roller bearing 85 which support drive shaft 73.
  • Hydrostatic pump 86 is located within second cavity 76 and attached to housing 74.
  • the clearance between rotor 84 and stator 83 forms a cylindrical passage 87 around rotor 84 through which hydraulic fluid may flow.
  • a plurality of axial passages 88 located around the outside of stator 83 are a plurality of axial passages 88 through which hydraulic fluid may also flow.
  • the clearance between rotor 84 and stator 83 which forms cylindrical passage 87 is sized to maximize the operating parameters of electric motor 72, and then the size, number and radial placement of axial passages 88 are determined relative to the size of cylindrical passage 87 such that the hydraulic fluid flow through cylindrical passage 87 and axial passages 88 provides uniform cooling of electric motor 72 and meets the auxiliary flow pressure and flow specifications of electric motor driven hydraulic pump 70.
  • first hydrodynamic pump 91 is an inlet inducer-impeller, as taught by United States Patent No. 4,281,971 issued August 4, 1981 to Kouns.
  • variable high pressure hydraulic pump 71 After passing through variable high pressure hydraulic pump 71, the hydraulic fluid is expelled from electric motor driven hydraulic pump 70 through variable high pressure hydraulic pump outlet 94, through a high pressure exit passage 95 and out a high pressure housing outlet 96.
  • the hydraulic fluid may flow through a flow-through attenuator 97 which substantially reduces the pumping ripple effect of variable high pressure hydraulic pump 71.
  • a auxiliary flow of hydraulic fluid consisting of portion of the working hydraulic fluid flow sufficient to meet the auxiliary flow pressure and flow specifications of electric motor driven hydraulic pump 70 is bled from inducer passage 92 through bypass passage 98 into first cavity 75 at variable high pressure hydraulic pump inlet pressure.
  • This auxiliary flow then passes through first cavity 75, where it combines with hydraulic fluid seepage from variable high pressure hydraulic pump 71 and lubricates variable high pressure hydraulic pump 71 and roller bearing 82 and then flows through both passage 77, lubricating ball bearing 81, and passage 79 into second hydrodynamic pump 78, where it is pumped, through hydrodynamic pump outlet 80, into the portion of second cavity 76 located to the right of electric motor 72.
  • the auxiliary flow then passes through cylindrical passage 87 and axial passages 88 into the portion of second cavity 76 located to the left of electric motor 72. As the auxiliary flow passes through second cavity 76, electric motor 72 is cooled.
  • the auxiliary flow then passes from the portion of second cavity 76 located to the left of electric motor 72 through hydrostatic pump inlets 99 into hydrostatic pump 86.
  • hydrostatic pump 86 is a gerotor which is driven by electric motor 72 through drive shaft 73.
  • the auxiliary flow is then expelled, pressurized to the auxiliary flow pressure and flow specifications of electric motor driven hydraulic pump 70, from hydrostatic pump 86 through hydrostatic pump outlet 100 into auxiliary flow discharge passage 101.
  • the auxiliary flow is then discharged from electric motor driven hydraulic pump 70 through auxiliary flow outlet 102.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

Une pompe (70) entraînée par un moteur électrique immergé comprend une pompe principale (71) qui pompe un fluide de travail spécifique entraîné par un moteur électrique mouillé (72) qui fonctionne en étant immergé dans le fluide de travail spécifique, ainsi que des moyens de purge (98), prévus avant l'admission dans la pompe principale (71), une partie du fluide de travail spécifique de l'écoulement total du fluide de travail spécifique entrant dans la pompe entraînée par le moteur électrique immergé afin de former un écoulement de fluide auxiliaire qui correspond sensiblement àla totalité du fluide dans lequel se trouve le moteur électrique immergé (72) en fonctionnement. L'écoulement de fluide auxiliaire correspond également sensiblement à la totalité du fluide qui est utilisé pour refroidir le moteur électrique immergé (72) et pour lubrifier ce dernier (72) ainsi que la pompe principale (71).
PCT/US1993/002340 1992-03-13 1993-03-12 Pompe entrainee par un moteur electrique immerge Ceased WO1993018303A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US85056092A 1992-03-13 1992-03-13
US850,560 1992-03-13

Publications (1)

Publication Number Publication Date
WO1993018303A1 true WO1993018303A1 (fr) 1993-09-16

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PCT/US1993/002340 Ceased WO1993018303A1 (fr) 1992-03-13 1993-03-12 Pompe entrainee par un moteur electrique immerge

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997047884A3 (fr) * 1996-06-14 1998-05-14 Sundstrand Corp Appareil d'alimentation d'un dispositif en liquide pressurise, et moteur/generateur correspondant refroidi par flux grande vitesse
WO1999060271A1 (fr) * 1998-05-15 1999-11-25 Continental Teves Ag & Co. Ohg Ensemble motopompe
GB2384824A (en) * 2002-01-28 2003-08-06 Visteon Global Tech Inc Bypass/leakage cooling of electric fuel pump
US6729307B2 (en) 2002-01-28 2004-05-04 Visteon Global Technologies, Inc. Bypass/leakage cooling of electric pump
WO2002081913A3 (fr) * 2001-04-06 2004-09-30 Bosch Rexroth Ag Groupe motopompe hydraulique
WO2012065320A1 (fr) * 2010-11-16 2012-05-24 上海维尔泰克螺杆机械有限公司 Pompe à liquide à vis jumelée
CN104314825A (zh) * 2014-08-25 2015-01-28 普仑斯(福建)泵业有限公司 带有冷却装置的卧式离心泵
KR20200086354A (ko) * 2017-11-22 2020-07-16 파커-한니핀 코포레이션 원심 보조를 갖는 사축 유압 펌프
WO2024141953A1 (fr) * 2022-12-28 2024-07-04 Stackpole International Engineered Products, Ltd. Orifice de sortie divisé pour pompe à dispositif de mesure de température interne

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2331917A1 (de) * 1973-06-22 1975-01-23 Hohenzollern Huettenverwalt Pumpaggregat
US4470772A (en) * 1982-05-20 1984-09-11 Tecumseh Products Company Direct suction radial compressor
US4865522A (en) * 1987-04-18 1989-09-12 Pierburg Gmbh Fuel pump for an internal combustion engine having two pump units

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2331917A1 (de) * 1973-06-22 1975-01-23 Hohenzollern Huettenverwalt Pumpaggregat
US4470772A (en) * 1982-05-20 1984-09-11 Tecumseh Products Company Direct suction radial compressor
US4865522A (en) * 1987-04-18 1989-09-12 Pierburg Gmbh Fuel pump for an internal combustion engine having two pump units

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
ABEX AEROSPACE; "Light Weight AC Motor Pump"; issued January 1991, pages 1-6. *
PNEUMO ABEX CORPORATION, "AC Motor for the Boeing 777 Aircraft", Abex/BAC Technical Coordination Meeting, issued 09 November 1990, pages 1-13. *

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997047884A3 (fr) * 1996-06-14 1998-05-14 Sundstrand Corp Appareil d'alimentation d'un dispositif en liquide pressurise, et moteur/generateur correspondant refroidi par flux grande vitesse
WO1999060271A1 (fr) * 1998-05-15 1999-11-25 Continental Teves Ag & Co. Ohg Ensemble motopompe
US6454543B1 (en) * 1998-05-15 2002-09-24 Continental Teves Ag & Co., Ohg Selectively operable multiple pump assembly
WO2002081913A3 (fr) * 2001-04-06 2004-09-30 Bosch Rexroth Ag Groupe motopompe hydraulique
GB2384824A (en) * 2002-01-28 2003-08-06 Visteon Global Tech Inc Bypass/leakage cooling of electric fuel pump
US6729307B2 (en) 2002-01-28 2004-05-04 Visteon Global Technologies, Inc. Bypass/leakage cooling of electric pump
WO2012065320A1 (fr) * 2010-11-16 2012-05-24 上海维尔泰克螺杆机械有限公司 Pompe à liquide à vis jumelée
CN104314825A (zh) * 2014-08-25 2015-01-28 普仑斯(福建)泵业有限公司 带有冷却装置的卧式离心泵
KR20200086354A (ko) * 2017-11-22 2020-07-16 파커-한니핀 코포레이션 원심 보조를 갖는 사축 유압 펌프
JP2021504618A (ja) * 2017-11-22 2021-02-15 パーカー・ハニフィン・コーポレーション 遠心支援を伴う曲げ軸液圧ポンプ
KR102653277B1 (ko) * 2017-11-22 2024-04-03 파커-한니핀 코포레이션 원심 보조를 갖는 사축 유압 펌프
WO2024141953A1 (fr) * 2022-12-28 2024-07-04 Stackpole International Engineered Products, Ltd. Orifice de sortie divisé pour pompe à dispositif de mesure de température interne

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