US3897178A - Pumping system - Google Patents

Pumping system Download PDF

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Publication number
US3897178A
US3897178A US396103A US39610373A US3897178A US 3897178 A US3897178 A US 3897178A US 396103 A US396103 A US 396103A US 39610373 A US39610373 A US 39610373A US 3897178 A US3897178 A US 3897178A
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United States
Prior art keywords
pump
motor
cover
cooling jacket
commutator
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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
US396103A
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English (en)
Inventor
Herbert Palloch
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.)
Frankl and Kirchner GmbH and Co KG
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Frankl and Kirchner GmbH and Co KG
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    • 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
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/12—Shaft sealings using sealing-rings
    • F04D29/126—Shaft sealings using sealing-rings 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
    • F04D29/5806—Cooling the drive system
    • 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
    • F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
    • F04D29/669—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for liquid pumps
    • 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
    • H02K5/20—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium
    • H02K5/203—Casings or enclosures characterised by the shape, form or construction thereof with channels or ducts for flow of cooling medium specially adapted for liquids, e.g. cooling jackets
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/10—Arrangements for cooling or ventilating by gaseous cooling medium flowing in closed circuit, a part of which is external to the machine casing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K9/00—Arrangements for cooling or ventilating
    • H02K9/28—Cooling of commutators, slip-rings or brushes e.g. by ventilating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2240/00—Components
    • F05B2240/70—Slinger plates or washers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/60—Fluid transfer
    • F05D2260/602—Drainage
    • F05D2260/6022—Drainage of leakage having past a seal
    • 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
    • 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
    • H02K5/124—Sealing of shafts
    • 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

  • ABSTRACT 30 Foreign Application Priority Data
  • a p gi gm comprising commutator motor an a lrecty riven pump, t e motor emg sur- Sept. 9, 1972 Germany 2244275 rounded over Substantially its entire p p y y a cooling jacket loaded with the liquid to be pumped [52] 417/368 417/366 6 and at least in part formed of the double wall of the [51] Int Cl 2 F04B 39/06 motor housing, the motor further being completely [58] Fie'ld 368 369 sealed from the cooling jacket and being provided at i 8 its center with a ventilator mounted on the shaft for the purpose of air circulation.
  • references Cited clude mounting the commutator in the vicinity of the pump side of the motor, said pump side also being UNITED STATES PATENTS cooled, and mounting the ventilator at the opposite 2,321,126 6/1943 Brewer 117/32; end of the haft to allow for particularly effective and 2,394,860 2/1946 Korte 17 3 t fth t 2,410,973 11/1946 Hoover 417/367 compac Coo mg 0 6 mo or 2,460,37l 2/1949 Szwargulski 417/369 6 Claims, 7 Drawing Figures PATENTEI] JUL 2 9 I975 SHEET PATENTED JULZQ 1975 SHEET PUMPING SYSTEM FIELD OF THE INVENTION
  • the present invention relates to pumping systems and more particularly to a quiet, self-priming, high speed pump driven by a commutator motor.
  • the prior art is aware of pumping systems or assemblies consisting of a commutator motor and of a directly driven pump, the commutating motor being sur rounded approximately over its entire outer periphery by a coolingjacket loaded with the liquid to be pumped and at least in part formed of the double wall of the motor housing, the motor further being completely sealed from the cooling jacket and being provided at its center with a ventilator mounted on the shaft for the purpose of air circulation.
  • Such pumping systems offer the great advantage of the high angular speeds of the commutator motors, so that, as a rule, the pumps designed as self-priming may be made correspondingly compact. Even the weight of the commutator motors will be slight at high angular speeds with respect to their outputs. On the other hand, operation of such commutator motors in these pumping systems is limited to the availability of external air for cooling if their operation is to be feasible.
  • US. Pat. No. 2,410,973 describes a pumping system of the kind described above, which is used and is meant to be used as a ,submersible or diving pump, that is, under water.
  • the housing of this device is in the shape of a traversing double cylinder jacket serving as cooling means with the cooling water flowing in at the pump end and out at the opposite end.
  • the commutator is mounted in the region of the end opposite that of the pump.
  • Two housing chambers are provided between the pump-side bearing end-cover and the pump, wherein are mounted three relatively long labyrinth seal arrangements.
  • An air circulation device is provided at the center of the motor, two ventilators being mounted on the shaft, one in the region of the pumpside bearing end-cover and the other outside the opposite bearing end-cover.
  • the commutator is mounted in the vicinity of the pump-side bearing end-cover, the latter also being cooled, which means that the motor is additionally provided with a front-end cooling besides the peripheral one, and because the ventilator is mounted at the opposite end of the motor, heat transfer from the commutator will take place by the shortest path and to a cooling surface which is large with respect to the commutator's volume, namely the front-end of the motor, and furthermore to a location where the cooling water still remains at its lowest temperature so that particularly effective heat transfer occurs.
  • These optimum heat transfer processes in turn allow especially compact motor design. Because the carbon brushes are externally accessible, they may be easily replaced.
  • a centrifugal disk for leakage water and an associated leakage water channel in the pump-side bearing end-cover will be advantageously provided between a pump-side seal and the associated bearing. This measure allows further meeting the solution of the problem of compactness and lightness of weight of the system because it makes the vast labyrinth seal arrangements unnecessary, so that both the length of the motor and its weight may be reduced.
  • the cooling jacket is formed, at least in part, by a sleeve surrounding the motor housing and removably fastened to the free front end of the motor.
  • This sleeve is tightly connected by its pump-side edge to the outer jacket of that part of the housing which is double-walled. This permits especially convenient cleaning of the cooling jacket if the latter should foul on account of pumping very dirty liquids, the sleeve forming the cooling jacket being very easy to remove. Easy cleaning further guarantees maintenance of sufficient cooling since dirt deposits in the cooling jacket lead to reductions in heat transfer.
  • such a sleeve may be made of sheet metal or such plates, contributing to weight reduction.
  • the invention provides a further advantageous characteristic in the nature of an annular slit between impeller and motor-side front-end of the pump, acting as communication between the pump and the cooling jacket. This ensures sufficient circulation for adequate cooling as regards the pumped liquid in the cooling jacket. This effect is further reinforced by the eddy currents of the liquid in the cooling jacket, which are caused by the pump-side surface of the impeller. This factor also reduces possible fouling of the cooling jacket, because only small-sized dirt may pass through the annular slit.
  • FIG. 1 a commutator motor according to the invention, in top view, from the pump-side end;
  • FIG. 2 the motor of FIG. 1, in top view, from the opposite end;
  • FIG. 3 a longitudinal section through a pumping system of the invention and along line IllIII of FIG. 1;
  • FIG. 4 the connection box of the motor in longitudinal section
  • FIG. 5 the connection box of FIG. 4, in top view, shown open;
  • FIG. 6 a pumping system of the invention. inside a soundproof cover shown in longitudinal section, and
  • FIG. 7 a soundproof cover as in FIG. 6 in top view.
  • a pump 2 is flanged onto a commutator motor 1.
  • the latter is provided with a housing 3 which is doublewalled in the region of the pump-side end.
  • Stator-plate assembly 4 is mounted in housing 3, the backs 5 of the stator laminations tightly abutting the inner wall of motor housing 3 and thus providing a heat-transferring connection.
  • An armature consisting of winding 6 and shaft 7 is rotatably mounted inside the stator-plate assembly 4.
  • Shaft 7 is supported in two bearing endcovers 8, 9 by means of ball-bearings 10.
  • the bearing end-cover 8 mounted at the other end is drawn by means of nuts 11 on spacer bolts 12 against housing 3, these nuts also serving to fasten the stator-plate assembly 4 in housing 3, a nut 12' on each spacer bolt being drawn against the stator-plate assembly 4.
  • the outer races of ball bearings are maintained in place by O-rings 13 of elastic material and strongly compressed in the normal state, which are inserted in the ballbearing boreholes of bearing endcovers 8, 9, so that even if there were expansion of the ballbearing boreholes, for instance from temperature rises, these outer races would not be dragged along by shaft 7.
  • a radial ventilator 14 is mounted on shaft 7 between armature winding 6 and bearing end-cover 8.
  • compression springs 15' pressing against the stator plates assembly 4 and guided by the spacer bolts, an air deflection plate 15 is kept in place, forcing the air in motor housing 3 to flow through the passage chambers upon rotation of shaft 7 and hence of the radial ventilator 14, i.e., from the latters compression side 16 externally past the air deflection plates 15 and into said passage chambers, which are formed from the flattened stator lamination backs 17 and the inner housing wall 18.
  • a commutator 22 and a balancing disk 23 are mounted on shaft 7 between the pump-side bearing end-cover 9 and armature winding 6.
  • Carbon brushes 27 rest movably against a contact plate 26 under pressure from a compression spring 25, while pressing with their other ends against commutator 22 and being housed in a carbon brush holder 24 fastened to housing 3.
  • Compression spring 25 and contact plates 26 serve to connect electrically comrnu tator 22 with stator winding 28.
  • Carbon brushes 27 are outwardly protected by means of covers 29 which are screwed by bolts 30 to housing 3 and thereby shielded against water jets.
  • a slip ring seal 31 is mounted outside of ballbearing 10 in bearing end-cover 9, which on one hand is sealed with respect to the bearing end-cover 9 by means of an O-ring 32 and on the other with respect to shaft 7 by means of O-ring 33. Any liquid still penetrating through the slip-ring seal will be collected by a centrifugal disk 34 mounted on shaft 7 between slip-ring seal 31 and ball-bearing 10 and cast against the walls of an annular space 35, whence it will be drained through the leakage water channel 36 to the outside; therefore, penetration of the liquid into the center of motor housing 3 is impossible.
  • bearing borehole of bearing end-cover 8 is completely sealed by means of a stopper 37, which may be screwed into the aperture of the bearing end-cover.
  • a stopper 37 which may be screwed into the aperture of the bearing end-cover.
  • O-ring seal 38 Complete sealing between the outer periphery of bearing end-cover 8 and housing 3 is achieved by means of an O-ring seal 38.
  • a space 39 above ballbearing 10 in bearing endcover 9 is made of one piece with the latter and with motor housing 3 in the form of connection box housing the ON and OFF switch 40 for the motor and a spark interference filter 42 elastically held by a spring member 41 between switch and inner wall of space 39.
  • the latter is sealed watertight upwards by a cover 43 itself fastened to housing 3 by means of screws 44'.
  • Cover 43 is made of plastic and provided above the switch with a thin, sprayed-on membrane 44, so that the switch 40 may be actuated externally by deforming this membrane.
  • a terminal board 45 is located next to switch 40, which is hooked up to the power cable 46 held in a traction relief clamp 47. Cable 46 is sealed by a grommet 48 and passes out of space 39.
  • housing 3 in the region of bearing end-cover 9 is made double-walled beyond commutator 22 by providing a cylindrical outer jacket 49 of one piece with housing 3, the latter being approximately coaxially surrounded by the spaced jacket. The latter also rests on fins 50 extending longitudinally on housing 3 and cast upon it. These fins extend beyond the outer jacket 49 almost to the end of housing 3.
  • An approximately cylindrical sleeve is slipped on the free end of outer jacket 49, inserting an O-ring seal providing tightness, which is further sealed at its other end opposite bearing end-cover 8 by an O-ring seal 53. This sleeve is screwed onto bearing end-cover 8 by means of bolts 54.
  • a space, serving as a cooling jacket, is defined by outer jacket 49 and sleeve 52, which is approximately cylindrical and surrounds the motor housing. said space being only interrupted in the region of the pump-side bearing end-cover9 by chamber 39 and by the commu tator brushes mounted in the horizontal plane and the longitudinal fins 50. Because of the premature ending of fins 50, these interruptions form longitudinal channels 57 interconnected by a continuous channel 58 of circular shape at their ends facing bearing end-cover 8'.
  • the outer jacket 49 extends beyond bearing end-cover 9 and is provided with a flange 59 at its end which may be bolted by means of boreholes 60 to the corresponding flange 61 of housing 62 of pump 2, inserting an O-ring seal 63. Simultaneously, a motor-side connecting part 64 of pump 2 is clamped between flange 61 and outer jacket 49.
  • An impeller 65 of pump 2 which is designed as a self-priming centrifugal pump, is mounted on the free end of shaft 7 projecting beyond bearing end-cover 9, pumping buckets 67 projecting freely and approximately radially mounted on hub 66 which is flush with connecting part
  • the liquid to be pumped will be sucked in through an inlet connection not shown here in the direction of flow arrow 68 and via a suction chamber 69, and in central manner by means of impeller 67, then it will be flung out approximately in radial direction and conveyed by means of the helically mounted deflection plate 70 into compression chamber 71, which it will leave via outlet connection 72.
  • impeller 65 communicates with chamber 74, which is bounded by bearing endcover 9, outer jacket 49 and connecting part 64, via an annular slit 73 between hub 66 of impeller 65 and connecting part 64, so that a constant liquid exchange is guaranteed between cooling jacket 74, 57 and 58 surrounding the entire motor housing 3 and pump 2, as was surprisingly found. even though there is no direct connection between these cooling chambers and the suction side of the pump. This liquid exchange is maintained due to the fact that a constant pressure is not created along the circumference of the pump wheel, resulting in the creation of a pressure gradient which in turn produces a circulatory flow in the cooling jacket.
  • Cooling of motor 1 occurs as follows: After starting the motor, the pumping liquid fills chamber 74, channels 57 and annular space 58, there occurring a constant change of water with simultaneous heat transfer through annular slit 73.
  • the heat generated in stator winding 28 in part is removed from the backs 5 of the stator laminations and from the housing inner wall at the contact area between them to the liquid, and to a further extent is absorbed by the air circulated by ventilator 14 and released by latter to the inside surface of the bearing end-cover 9 or to that of motor housing 3, and from there is transferred to the liquid.
  • the heat generated by armature winding 6 and by commutator 22 represents an appreciable part of the entire heat being generated by the motor and will be transferred in part by the circulating air in the manner already described to the cooling liquid and in part directly via shaft 7 into chamber 74 to the cooling liquid.
  • FIGS. 6 and 7 shows the application of a commutatormotor and pump system 1, 2 in the form of a portable, soundproof unit.
  • Motor 1 and pump 2 are mounted on a base plate 82 by means of soundinsulating elements, especially commercial vibration mounts 81 and fastened to it by such suitable means as bolts 83.
  • the motor-pump system 1, 2 is surrounded at slight spacing with a soundproofing cover 84; however, there is no direct contact between system and cover 84.
  • Power. connection 46 to motor 1 passes through a small aperture at the lower edge of the soundproofing cover and is fastened to base plate 82 by means of a traction relief clamp 86.
  • a carrying handle 87 is fastened by means of screws 88 to the box-like soundproof cover 84 which is roughly shaped to fit the motor-pump system 1, 2.
  • An aperture '89 is located in the soundproof cover 84 underneath the carrying handle 87 and above the ON and OFF switch 40 of motor 1, whichis sealed by means of membrane 90 that is welded on or sprayed on so as to allow activating the switch 40 through that membrane.
  • the soundproof cover 84 is mounted by means of screws 91 to motor 1, but may also be directly connected to base plate 82 in suitable manner.
  • a peripheral seal 92 is appropriately provided between the peripheral lower edge of soundproof cover 84 and base plate 82, in order to achieve sufficient sealing against humidity and also to prevent the occurrence of an acoustic path between the inner chamber and the surroundings.
  • the soundproof cover 84, base plate 82 and carrying handle 87 and if necessary also the inlet and outlet connectors 85, 72 will be appropriately made of a sufficiently impact-proof plastic, which with respect to metal in general will offer the advantage of lesser sound conductivity. It will furthermore be suitable to provide the inside of the soundproof cover with a layer of sound attenuating material, which may be glued on or sprayed on. This also applies to the base plate 82. Sealed-pore foams are especially suitable for additional coatings of soundproofing materials, since on one hand they will be extremely light-weight and on the other provide high attenuation properties.
  • a pumping system comprising a commutator motor having a housing, a shaft, a commutator, carbon brushes and bearing end-covers at the pump side and the opposite side thereof, a pump directly driven by said motor, a cooling jacket formed at least in part by a double-walled design of said motor housing surrounding substantially the entire periphery of said motor, filling means for filling said cooling jacket with the liquid to be pumped when in use, said motor being completely sealed from said cooling jacket, and ventilator means including a ventilator mounted on said shaft for forcing air circulation at the center of said motor, the improvements wherein:
  • said pump-side bearing end-cover is surrounded by said cooling jacket
  • said commutator is mounted in the region of said pump-side bearing end-cover;
  • said motor housing has covers therein for outwardly shielding the carbon brushes of said commutator;
  • said ventilator is mounted in the region within the bearing end cover which is opposite to that at the pump-side.
  • cooling jacket consists in part of a sleeve surrounding said motor housing and removably mounted on the side of said motor opposite said pump.
  • said filling means includes an impeller directly mounted on said shaft at the motor-side of said pump and further including an annular slit means in the motor-side of said pump for serving as communication between said impeller and said cooling jacket.
  • a pumping system in accordance with claim 1 fur ther including an omnidirectionally scaled soundproof cover and a handle connected thereto. said cover surrounding said motor and said pump.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US396103A 1972-09-09 1973-09-10 Pumping system Expired - Lifetime US3897178A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2244275A DE2244275C3 (de) 1972-09-09 1972-09-09 Gekapselter Kollektormotor für ein Pumpenaggregat

Publications (1)

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US3897178A true US3897178A (en) 1975-07-29

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US396103A Expired - Lifetime US3897178A (en) 1972-09-09 1973-09-10 Pumping system

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US (1) US3897178A (enrdf_load_stackoverflow)
DE (1) DE2244275C3 (enrdf_load_stackoverflow)
FR (1) FR2199356A5 (enrdf_load_stackoverflow)
GB (1) GB1428445A (enrdf_load_stackoverflow)
HK (1) HK9681A (enrdf_load_stackoverflow)
SE (1) SE395938B (enrdf_load_stackoverflow)

Cited By (30)

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US4086034A (en) * 1973-03-15 1978-04-25 Airborne Mfg. Co. Fluid cooled commutated electric motor driving a pump
US4810174A (en) * 1986-12-12 1989-03-07 Flint & Walling, Inc. Motor and pump assembly
DE4024194A1 (de) * 1989-08-04 1991-02-07 Fagor S Coop Ltda In durch synchronmotor angetriebenen pumpen fuer haushaltsgeraete eingefuehrte besserungen
US5058557A (en) * 1989-12-13 1991-10-22 Robert Bosch Gmbh Apparatus for delivery of fuel from a storage tank to an internal combustion engine of a vehicle
EP0538212A1 (en) * 1991-09-03 1993-04-21 ITT Flygt Aktiebolag Pump impeller
US5320501A (en) * 1991-04-18 1994-06-14 Vickers, Incorporated Electric motor driven hydraulic apparatus with an integrated pump
US5322420A (en) * 1992-12-07 1994-06-21 Carrier Corporation Horizontal rotary compressor
US5401145A (en) * 1993-03-04 1995-03-28 Robert Bosch Gmbh Electric motor operated impeller
US5464332A (en) * 1993-01-11 1995-11-07 Copeland Corporation Compressor with motor cooling fan
WO1997023733A3 (de) * 1995-12-22 1997-09-18 Mannesmann Rexroth Aktiengesel Hydraulisches kompaktaggregat
US5930852A (en) * 1997-03-21 1999-08-03 Aqua-Flo, Incorporated Heat exchanging pump motor for usage within a recirculating water system
DE19852569A1 (de) * 1998-11-13 2000-05-18 Miele & Cie Umwälzpumpe, insbesondere für wasserführnde Haushaltgeräte
DE19928515A1 (de) * 1998-12-07 2000-06-08 Bosch Gmbh Robert Hydraulisches Kompaktaggregat
EP1074745A1 (en) * 1999-08-06 2001-02-07 Eng & Mark s.r.l. Hydraulic machine with automatic control device attached
US20010009114A1 (en) * 2000-01-11 2001-07-26 Herve Laurandel Motorized reduction gear intended for functional equipment of motor vehicles
US6775474B2 (en) 2002-05-01 2004-08-10 Watlow Electric Manufacturing Company Heat transfer system without a rotating seal
WO2002081913A3 (de) * 2001-04-06 2004-09-30 Bosch Rexroth Ag Hydraulisches pumpenaggregat
US20050072403A1 (en) * 2002-06-27 2005-04-07 Denso Corporation Throttle device
WO2006008844A1 (en) * 2004-07-16 2006-01-26 Ebara Corporation Motor pump
US20070212238A1 (en) * 2004-08-23 2007-09-13 Frank Mohn Flatoy As Rotodynamic Fluid Machine
US20120212098A1 (en) * 2009-10-19 2012-08-23 Robert Bosch Gmbh Electric machine, hydraulics unit
WO2013174400A1 (de) * 2012-05-23 2013-11-28 Baumüller Nürnberg GmbH Elektrische maschine
US20140014109A1 (en) * 2011-04-11 2014-01-16 Airfan Apparatus for regulated delivery of a gas, notably respiratory assistance apparatus
US20170138362A1 (en) * 2015-11-12 2017-05-18 Nidec Motor Corporation Pump motor for high temperature fluids
CN107366616A (zh) * 2017-08-23 2017-11-21 四川达灿石油设备有限公司 一种应用于沙漠中的压裂泵
US10047767B2 (en) 2010-12-14 2018-08-14 Alfred Kärcher Gmbh & Co. Kg Motor pump unit for a high-pressure cleaning appliance, and high-pressure cleaning appliance
US20180274526A1 (en) * 2015-10-02 2018-09-27 Robert Bosch Gmbh Electrohydraulic Compact Assembly
US20230151822A1 (en) * 2019-06-13 2023-05-18 Guangdong Junchi Science And Technology Co., Ltd. Electric centrifugal pump
US20230220797A1 (en) * 2020-07-01 2023-07-13 Roger Hayes Hydraulic motor system for liquid transport tank
US20230392606A1 (en) * 2022-06-03 2023-12-07 Bloom Energy Corporation Centrifugal blower including shrouded mixed flow impeller for enhanced cooling

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Publication number Priority date Publication date Assignee Title
IT219068Z2 (it) * 1989-12-12 1992-11-27 Oemer Motori Elettrici S P A Struttura di involucro esterno,particolarmente studiata per motori eletrici
DE9104284U1 (de) * 1991-04-09 1992-05-07 Siemens AG, 8000 München Elektromotor mit in einem Lagerschild integrierter Aufnahme für eine von dem Elektromotor angetriebene Pumpe
DE4118057A1 (de) * 1991-06-01 1992-12-03 Oplaender Wilo Werk Gmbh Verpackung einer pumpe
DE4142268C2 (de) * 1991-12-20 2000-06-21 Mannesmann Vdo Ag Kraftstoff-Fördereinrichtung
DE4406233A1 (de) * 1994-02-25 1995-08-31 Wilo Gmbh Vorrichtung mit einer elektromotorisch betriebenen Pumpe
DE9415319U1 (de) * 1994-09-21 1996-01-25 Wilo Gmbh, 44263 Dortmund Tauchmotorpumpe
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GB2493360A (en) * 2011-08-02 2013-02-06 Marcus Bicknell Submersible pump with bulkhead between impeller and motor
CN103280927A (zh) * 2013-06-18 2013-09-04 天津市隆诚泰铝业有限公司 水冷电机壳双冷却回路结构
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US5401145A (en) * 1993-03-04 1995-03-28 Robert Bosch Gmbh Electric motor operated impeller
WO1997023733A3 (de) * 1995-12-22 1997-09-18 Mannesmann Rexroth Aktiengesel Hydraulisches kompaktaggregat
US6146113A (en) * 1995-12-22 2000-11-14 Mannesmann Rexroth Ag Compact hydraulic unit
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WO2002081913A3 (de) * 2001-04-06 2004-09-30 Bosch Rexroth Ag Hydraulisches pumpenaggregat
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US10047767B2 (en) 2010-12-14 2018-08-14 Alfred Kärcher Gmbh & Co. Kg Motor pump unit for a high-pressure cleaning appliance, and high-pressure cleaning appliance
US20140014109A1 (en) * 2011-04-11 2014-01-16 Airfan Apparatus for regulated delivery of a gas, notably respiratory assistance apparatus
US9616188B2 (en) * 2011-04-11 2017-04-11 Airfan Apparatus for regulated delivery of a gas, notably respiratory assistance apparatus
WO2013174400A1 (de) * 2012-05-23 2013-11-28 Baumüller Nürnberg GmbH Elektrische maschine
US20180274526A1 (en) * 2015-10-02 2018-09-27 Robert Bosch Gmbh Electrohydraulic Compact Assembly
US10605236B2 (en) * 2015-10-02 2020-03-31 Robert Bosch Gmbh Electrohydraulic compact assembly
US20170138362A1 (en) * 2015-11-12 2017-05-18 Nidec Motor Corporation Pump motor for high temperature fluids
US10302082B2 (en) * 2015-11-12 2019-05-28 Nidec Motor Corporation Pump motor for high temperature fluids
US20190219054A1 (en) * 2015-11-12 2019-07-18 Nidec Motor Corporation Pump motor for high temperature fluids
US10473101B2 (en) * 2015-11-12 2019-11-12 Nidec Motor Corporation Pump motor for high temperature fluids
CN107366616A (zh) * 2017-08-23 2017-11-21 四川达灿石油设备有限公司 一种应用于沙漠中的压裂泵
US20230151822A1 (en) * 2019-06-13 2023-05-18 Guangdong Junchi Science And Technology Co., Ltd. Electric centrifugal pump
US11698083B2 (en) * 2019-06-13 2023-07-11 Guangdong Junchi Science And Technology Co., Ltd. Electric centrifugal pump
US20230220797A1 (en) * 2020-07-01 2023-07-13 Roger Hayes Hydraulic motor system for liquid transport tank
US11802505B2 (en) * 2020-07-01 2023-10-31 Roger Hayes Hydraulic motor system for liquid transport tank
US20240052771A1 (en) * 2020-07-01 2024-02-15 Roger Hayes Hydraulic motor system for liquid transport tank
US12228065B2 (en) * 2020-07-01 2025-02-18 Roger Hayes Hydraulic motor system for liquid transport tank
US20230392606A1 (en) * 2022-06-03 2023-12-07 Bloom Energy Corporation Centrifugal blower including shrouded mixed flow impeller for enhanced cooling

Also Published As

Publication number Publication date
SE395938B (sv) 1977-08-29
FR2199356A5 (enrdf_load_stackoverflow) 1974-04-05
DE2244275A1 (de) 1974-03-28
HK9681A (en) 1981-03-27
GB1428445A (en) 1976-03-17
DE2244275C3 (de) 1975-09-04
DE2244275B2 (de) 1975-01-16

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