Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K9/00—Arrangements for cooling or ventilating
  • H02K9/19—Arrangements for cooling or ventilating for machines with closed casing and closed-circuit cooling using a liquid cooling medium, e.g. oil
• • 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
• • 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
  • F04B23/14—Combinations of two or more pumps the pumps being of different types at least one pump being of the non-positive-displacement type
• • 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
  • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
  • F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
• • 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
  • F04D13/00—Pumping installations or systems
  • F04D13/12—Combinations of two or more 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
  • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
  • F04D15/0066—Control, e.g. regulation, of pumps, pumping installations or systems by changing the speed, e.g. of the driving engine
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
  • H02K11/04—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection for rectification
  • H02K11/049—Rectifiers associated with stationary parts, e.g. stator cores
  • H02K11/05—Rectifiers associated with casings, enclosures or brackets
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K2205/00—Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports
  • H02K2205/12—Machines characterised by means for reducing windage losses or windage noise
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K3/00—Details of windings
  • H02K3/04—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors
  • H02K3/24—Windings characterised by the conductor shape, form or construction, e.g. with bar conductors with channels or ducts for cooling medium between the conductors
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/12—Casings or enclosures characterised by the shape, form or construction thereof specially adapted for operating in liquid or gas
• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02K—DYNAMO-ELECTRIC MACHINES
  • H02K5/00—Casings; Enclosures; Supports
  • H02K5/04—Casings or enclosures characterised by the shape, form or construction thereof
  • H02K5/22—Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes
  • H02K5/225—Terminal boxes or connection arrangements
• • 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

Definitions

• the present invention relates to an improved apparatus for providing
• induction motors are used to drive hydraulic pumps for
• rotor of the motor has to be relatively small, less than 0.1 inch, and typically .03-
• An object of the present invention is to provide an improved apparatus for
• apparatus of the invention for providing a large volume of pressurized liquid to a
• the apparatus comprises a pump for pumping a liquid, a high speed flood
• the motor as a variable speed motor.
• a permanent magnet dynamoelectric machine is used for better efficiency
• the motor includes a stator and a rotor with an airgap
• the permanent magnet motor
• the motor is flood cooled by the liquid being pumped to reduce
• the motor are not impregnated to allow the liquid to flow through slots in the
• the motor can operate at relatively high current densities.
• the rotor of the apparatus comprises a hollow rotor shaft formed of at least two
• Supports are also provided on both sides of end turns of the stator windings in the
• the axial piston pump it is limited to relatively low speeds, as compared with the
• the dynamoelectric machine of the apparatus as an electrical generator as a back
• diameter to length is optimized for minimum weight and hydraulic friction losses.
• Fig. 1 is a schematic diagram of an apparatus according to the invention for
• FIG. 2 is a cross sectional view of the apparatus of Fig. 3 taken along the
• Fig. 3 is a cross sectional view of the apparatus of Fig. 1 taken along a
• Figs. 4 and 5 are each an enlarged views of sections of the apparatus of Fig.
• Fig. 6. is an enlarged cross sectional view of the apparatus of Figs. 1 and
• Fig. 7 is a cross sectional view taken along the line VII-VII in Fig. 3;
• Fig. 8 is an enlarged view of a slot in the stator armature with stator
• Fig. 9 is a cross sectional view taken along the line IX-IX in Fig. 3;
• Fig. 10 is a cross sectional view of the apparatus of Fig. 3 taken along the
• Fig. 1 1 is a cross sectional view of the apparatus of Fig. 3 taken along the
• Fig. 12 is a sectional line taken along the line XII-XII in Fig. 3 illustrating the
• FIG. 1 The apparatus 1
• centrifugal pump 71 to supply charge to an axial piston pump 2 and
• the axial piston pump 2 is for supplying high pressure liquid
• the gear pump 4 reduces the motor speed to drive the pumps and
• the apparatus 1 further includes a
• impeller 6 is located upstream of the axial piston pump 2 in the apparatus.
• passages 7 are provided in the apparatus for circulating a portion of the liquid
• the apparatus 1 includes no
• the apparatus 1 is shown in
• the motor 3 of the apparatus 1 is a brushless DC motor adapted to be
• liquid-cooled power electronics including an inverter and a controller for
• FIG. 3 schematically in Fig. 3, conveys liquid coolant through the control 5 from an inlet 9 to an outlet 10.
• the control 5 is connected to the housing 1 1 of the motor 3 by
• annular chamber 12 of the motor 3 adjacent the right end of the stator 13 of the
• the dynamoelectric machine 3 which normally operates as a motor for
• gear pump 4 can also be operated as a generator to provide a backup electrical
• the axial piston pump 2 is
• the pump 2 for operation as a hydraulic motor to drive the rotor 1 8 of machine 3
• the motor 3 is a high speed permanent magnet motor adapted to be flood
• the liquid coolant exits the motor through an outlet 19 in motor 3.
• Cooling the drive 4 and control 5 before the motor 3 advantageously warms the motor 3
• the motor housing 1 1 surrounds the stator 1 3 and rotor 1 8 of the motor.
• stator and rotor are separated by an unusually large airgap, preferably
• the stator 13 of the motor 3 within housing 1 1 includes an armature 21
• stator windings extend from opposite ends of the armature as depicted in
• a cylindrical rotor receiving opening 25 extends through the stator along
• stator windings 23 in the slots 22, while insulated, are not impregnated
• An insulation material 34 is located about the supports
• the insulation material 34 has a high
• liquid for example.
• One suitable material for insulation 34 is known by the tradename Ryton.
• the radially inward surface of the annular stator is formed by thin metal sleeve 49
• the rotor 18 of the motor includes a plurality of permanent magnets 50, see
• the magnets 50 are supported on a hollow rotor shaft 51 formed
• the rotor extending through the rotor receiving opening 25 of the stator.
• the outer surface of the rotor is formed by a metal sleeve 55 which is spaced from the
• circulating the liquid coolant include the airgap 56 through which the liquid coolant
• the metal sleeve 55 and an end plate 57 of the rotor are welded to the
• the length to diameter ratio of the motor 3 is preferably on the order of 2: 1 for
• the inverter of the control 5 and the motor 3 have a power rating of 80 KVA.
• the brushless permanent magnet machine generates a
• the diameter of the motor can also be
• liquid coolant through the flood cooled motor 2 in the disclosed embodiment may
• the circulating liquid also provides lubrication to the
• actuator 59 of an airplane shown schematically in Fig. 3, is taken in an inlet 58
• the gears 64 and 65 provide both the drive between the axial piston
• a pressure relief valve shown
• the pump 2 is pressure compensated and takes
• the pressurized liquid exits the pump 2 by way of pump outlet 70 and
• Typical operating conditions for the apparatus 1 include driving the rotor 18
• the drive 4 is a power
• Hydraulic liquid at the inlet 58 of the pump housing is at a relatively
• the motor 3 can be operated at a relatively high current density such that the efficiency of the

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Motor Or Generator Cooling System (AREA)
• Electromagnetic Pumps, Or The Like (AREA)
• Details Of Reciprocating Pumps (AREA)

Applications Claiming Priority (3)

Publications (1)

Family

ID=24662096

Family Applications (1)

Country Status (3)

Families Citing this family (14)

Family Cites Families (11)

• 1997
  • 1997-05-23 WO PCT/US1997/008898 patent/WO1997047884A2/en not_active Ceased
  • 1997-05-23 JP JP50161998A patent/JP2001516414A/ja active Pending
  • 1997-05-23 EP EP97927757A patent/EP0904491A2/de not_active Withdrawn

Non-Patent Citations (1)

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