US20200263685A1 - Hydraulic unit - Google Patents

Hydraulic unit Download PDF

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Publication number
US20200263685A1
US20200263685A1 US16/648,223 US201816648223A US2020263685A1 US 20200263685 A1 US20200263685 A1 US 20200263685A1 US 201816648223 A US201816648223 A US 201816648223A US 2020263685 A1 US2020263685 A1 US 2020263685A1
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United States
Prior art keywords
motor
oil cooler
cooling fan
cooling air
hydraulic
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Abandoned
Application number
US16/648,223
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English (en)
Inventor
Hirotoshi Torii
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Daikin Industries Ltd
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Daikin Industries Ltd
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Assigned to DAIKIN INDUSTRIES, LTD. reassignment DAIKIN INDUSTRIES, LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: TORII, HIROTOSHI
Publication of US20200263685A1 publication Critical patent/US20200263685A1/en
Abandoned legal-status Critical Current

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    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
    • 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
    • F04B17/00—Pumps characterised by combination with, or adaptation to, specific driving engines or motors
    • F04B17/03—Pumps characterised by combination with, or adaptation to, specific driving engines or motors driven by electric motors
    • 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
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
    • F04B23/028—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir the pump being mounted on top of the reservoir
    • 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
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/0233—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels
    • F28D1/024—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with air flow channels with an air driving element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/03—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits
    • F28D1/0308—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other
    • F28D1/0325—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with plate-like or laminated conduits the conduits being formed by paired plates touching each other the plates having lateral openings therein for circulation of the heat-exchange medium from one conduit to another
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/0535—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight the conduits having a non-circular cross-section
    • F28D1/05358—Assemblies of conduits connected side by side or with individual headers, e.g. section type radiators
    • 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
    • H02K5/18—Casings or enclosures characterised by the shape, form or construction thereof with ribs or fins for improving heat transfer
    • 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
    • F04B23/02—Pumping installations or systems having reservoirs
    • F04B23/025—Pumping installations or systems having reservoirs the pump being located directly adjacent the reservoir
    • 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
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/26—Supply reservoir or sump assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16H—GEARING
    • F16H61/00—Control functions within control units of change-speed- or reversing-gearings for conveying rotary motion ; Control of exclusively fluid gearing, friction gearing, gearings with endless flexible members or other particular types of gearing
    • F16H61/38—Control of exclusively fluid gearing
    • F16H61/40—Control of exclusively fluid gearing hydrostatic
    • F16H61/4165—Control of cooling or lubricating
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
    • F28D2021/0049—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for lubricants, e.g. oil coolers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings

Definitions

  • the present invention relates to a hydraulic unit.
  • a conventional hydraulic unit includes a hydraulic pump, a motor that drives the hydraulic pump, an oil cooler that is provided near the motor, and a cooling fan that cools the oil cooler (see Patent Literature 1).
  • a cooling fan that cools the oil cooler
  • Patent Literature 1 JP 2008-8252 A
  • an object of the present invention is to provide a hydraulic unit that can suppress a decrease in cooling efficiency of a motor.
  • a hydraulic unit according to one aspect of the present invention includes
  • a motor that is configured to drive the hydraulic pump
  • an oil cooler that is configured to cool hydraulic oil discharged from the hydraulic pump
  • a cooling fan that supplies cooling air to the motor and the oil cooler
  • the oil cooler includes
  • the shroud includes a wall section that covers at least one of the pair of headers.
  • the wall section of the shroud blocks a flow of air directly sucked into the cooling fan from around the header of the oil cooler without flowing around the motor.
  • the wall section of the shroud covers at least one of the pair of headers of the oil cooler, the wall section blocks the flow of air leaking from the header of the oil cooler. Therefore, compared with a case where a shroud does not include the wall section, the volume of cooling air which flows around the motor among the cooling air supplied by the cooling fan increases, and it is possible to suppress a decrease in cooling efficiency of the motor.
  • the hydraulic unit further includes
  • a controller that is disposed adjacent to the motor and controls the motor
  • controller includes
  • the shroud includes a guide section that is configured to guide part of the cooling air blown out from the cooling fan toward the heat sink.
  • the guide section of the shroud guides part of the cooling air blown out from the cooling fan toward the heat sink. Therefore, the cooling fan can cool the drive circuit in addition to the motor and the oil cooler.
  • the hydraulic unit further includes
  • a controller that is disposed adjacent to the motor and controls the motor
  • controller includes
  • the hydraulic unit further includes a louver that is provided between the oil cooler and the motor and that is configured to guide part of the cooling air blown out from the cooling fan toward the heat sink.
  • the louver guides part of the cooling air blown out from the cooling fan toward the heat sink. Therefore, the cooling fan can cool the drive circuit of the controller in addition to the motor and the oil cooler.
  • the hydraulic unit further includes
  • the motor cover has a shape that is adapted to a shape of the motor.
  • the motor cover since the motor cover has the shape that is adapted to the shape of the motor, the cooling air supplied by the cooling fan flows along the shape of the motor. Therefore, the cooling air flowing away from the motor among the cooling air supplied by the cooling fan decreases. As a result, the volume of the cooling air flowing around the motor increases and a decrease in the cooling efficiency of the motor can be suppressed.
  • the motor cover covers almost entire space between the oil cooler and the motor.
  • the motor cover covers almost the entire space between the oil cooler and the motor, in a case where the cooling fan sucks the cooling air from around the motor and through the oil cooler, the motor cover blocks the flow of air that does not flow around the motor but is directly sucked into the cooling fan from between the motor and the motor.
  • the motor cover blocks the flow of the cooling air from the space between the oil cooler and the motor toward the outside of the motor cover. Therefore, the volume of cooling air supplied by the cooling fan and flowing around the motor can be increased, and a decrease in the cooling efficiency of the motor can be suppressed.
  • the hydraulic unit further includes
  • a motor cover that is provided. such that the cooling air supplied by the cooling fan flows around the motor and that the motor cover covers the motor
  • the cooling air supplied to the inside of the motor cover by the cooling fan flows around the heat sink in addition to the motor and the oil cooler. Therefore, the cooling fan can cool the drive circuit of the controller in addition to the motor and the heat sink.
  • the wall section of the shroud covers at least one of the headers of the oil cooler. Therefore, the volume of cooling air supplied by the cooling fan and flowing around the motor increases and a decrease in the cooling efficiency of the motor can be suppressed.
  • FIG. 1 is a perspective view of a hydraulic unit according to a first embodiment of the present invention.
  • FIG. 2 is a side view of the hydraulic unit with a motor cover of the hydraulic unit removed.
  • FIG. 3 is a side view of the hydraulic unit with a pump of the hydraulic unit removed.
  • FIG. 4 is a front view of an oil cooler and a shroud.
  • FIG. 5 is a plan view of the hydraulic unit.
  • FIG. 6 is a perspective view of the motor cover.
  • FIG. 7 is a perspective view of a shroud according to a second embodiment of the present invention.
  • FIG. 8 is a plan view of a hydraulic unit according to the second embodiment of the present invention with a motor cover removed.
  • FIG. 9 is a perspective view of a louver according to a third embodiment of the present invention.
  • a hydraulic unit 1 according to the present embodiment supplies hydraulic oil to an external device such. as a machine tool.
  • FIG. 1 is a perspective view of the hydraulic unit 1 .
  • the front-rear direction, the width direction, and the height direction of the hydraulic unit 1 of the present embodiment may be referred to as an X direction, a Y direction, and a Z direction, respectively.
  • the hydraulic unit 1 includes a hydraulic oil tank 10 that stores hydraulic oil, and a stand 11 that is attached to the upper portion of the hydraulic oil tank 10 .
  • the hydraulic unit 1 includes a hydraulic pump 20 , a motor 30 (illustrated in FIG. 2 ) that drives the hydraulic pump 20 , an oil cooler 40 that cools hydraulic oil discharged from the hydraulic pump 20 , and a controller 50 that controls the motor 30 .
  • the hydraulic pump 20 , the motor 30 , the oil cooler 40 , and the controller 50 are mounted on the stand 11 , and the hydraulic oil tank 10 is disposed under the stand 11 .
  • the hydraulic unit 1 includes a cooling fan 60 that supplies cooling air to the motor 30 and the oil cooler 40 , a shroud 70 provided between the cooling fan 60 and the oil cooler 40 , and a motor cover 80 that covers the motor 30 .
  • FIG. 2 is a side view of the hydraulic unit 1 with the motor cover 80 removed, as viewed in the Y direction.
  • the hydraulic pump 20 , the motor 30 , the oil cooler 40 , the shroud 70 , and the cooling fan 60 are disposed in order in the X direction.
  • the hydraulic pump 20 is connected to a suction pipe 21 connected to the hydraulic oil tank 10 and a drain pipe 22 connected to the oil cooler 40 .
  • the hydraulic pump 20 is supplied with hydraulic oil from the hydraulic oil tank 10 through the suction pipe 21 and discharges the hydraulic oil to the oil cooler 40 through the drain pipe 22 .
  • the cooling fan 60 is an axial fan and is attached to the shroud 70 .
  • the cooling fan 60 according to the present embodiment is disposed so as to blow out air in the X direction (see an arrow R 1 ).
  • FIG. 3 is a side view of the hydraulic unit 1 with the hydraulic pump 20 removed, as viewed in the X direction.
  • the motor 30 has a cylindrical shape and includes fins 31 protruding radially from the Outer periphery.
  • the controller 50 is disposed on a side of the motor 30 in the Y direction.
  • the controller 50 includes a drive circuit 51 and a heat sink 52 that cools the drive circuit 51 .
  • the heat sink 52 protrudes from a side surface of the controller 50 and extends above the motor 30 . Further, referring also to FIG. 2 , the heat sink 52 of the controller 50 disposed behind the oil cooler 40 .
  • the motor cover 80 is fixed to the stand 11 and the controller 50 so as to cover the motor 30 and the heat sink 52 of the controller 50 .
  • the motor 30 and the heat sink 52 of the controller 50 are disposed in a space surrounded by the motor cover 80 , the stand 11 , and the controller 50 .
  • FIG. 4 is a perspective view of the oil cooler 40 and the shroud 70 .
  • the oil cooler 40 is an air-cooled heat exchanger, and includes a pair of headers 41 A, 41 B, and a heat exchange unit 42 provided between the pair of headers 41 A, 41 B.
  • the drain pipe 22 is connected to one header 41 A, and a return pipe 43 is connected to the other header 41 B.
  • the heat exchange unit 42 includes a plurality of tubes 42 a provided with fins, not illustrated.
  • the high-temperature hydraulic oil that has flowed out from the hydraulic pump 20 (illustrated in FIG. 2 ) into the oil cooler 40 through the drain pipe 22 is distributed to the plurality of tubes 42 a of the heat exchange unit 42 by the one header 41 A and is cooled while flowing through the plurality of tubes 42 a of the heat exchange unit 42 .
  • the cooled hydraulic oil flows into the other header 41 B and is returned to the hydraulic oil tank 10 (illustrated in FIG. 2 ) through the return pipe 43 .
  • the shroud 70 includes a body section 71 having a rectangular shape and a wall section 72 having a rectangular shape.
  • the body section 71 of the shroud 70 has substantially the same size as the heat exchange unit 42 of the oil cooler 40 and covers the heat exchange unit 42 of the oil cooler 40 .
  • a circular opening 71 a is formed in a substantially central portion of the body section. 71 of the shroud 70 . Referring also to FIG. 1 , the opening 71 a of the shroud 70 is covered with the cooling fan 60 .
  • the wall section 72 of the shroud 70 covers the one header 41 A the oil cooler 40 .
  • the wall section 72 of the shroud 70 has a bent section 72 a provided at one end portion thereof and bent rearward so as to be orthogonal to the wall section 72 .
  • FIG. 5 is a plan view of the hydraulic unit 1 .
  • a main part is clearly illustrated in an enlarged view surrounded by a one-dot chain line circle.
  • the bent section 72 a of the wall section 72 of the shroud 70 is in contact with a side surface of the controller 50 .
  • the motor cover 80 covers almost the entire space between the motor 30 and the oil cooler 40 .
  • an interval of a filter thickness (about 6 mm) is provided between the motor 30 and the oil cooler 40 so that a filter, not illustrated, can be inserted from above.
  • FIG. 6 is a perspective view of the motor cover 80 .
  • the motor cover 80 includes resin and has the shape that follows the shape of the motor 30 (illustrated in FIG. 3 ).
  • the motor cover 80 includes a first vertical section 81 that extends in the Z direction, an inclined. section 82 that is continuous with the first vertical section 81 , a first horizontal section 83 that is continuous with the inclined section 82 and extends in the Y direction, a second vertical section 84 that is continuous with the first horizontal section 83 and extends in the Z direction, and a second horizontal section 85 that is continuous with the second vertical section 84 and extends in the Y direction.
  • the inclined section 82 of the motor cover 80 is a flat surface extending obliquely upward toward the Z direction side and the Y direction side.
  • the motor cover 80 includes a flange section 86 that extends outward from the front edge of the first vertical section 81 , of the inclined section 82 , and of the first horizontal section 83 .
  • the portion surrounded by the front edge of the flange section 86 of the motor cover 80 , the stand 11 , and the controller 50 has substantially the same size as that of the oil cooler 40 (see FIGS. 3 and 5 ).
  • the inclined section 82 of the motor cover 80 can further reduce the volume of air that flows away from the motor 30 and does not contribute to cooling among the cooling air supplied by the cooling fan 60 , the cooling air flowing inside the motor cover 80 than in a case where the motor cover 80 does not includes the inclined section 82 .
  • the cooling fan 60 blows out air in the X direction.
  • cooling air is sucked into the cooling fan 60 from the rear through the inside of the motor cover 80 .
  • the cooling air flows around the motor 30 and the heat sink 52 of the controller 50 , and thus cools the motor 30 and the drive circuit 51 of the controller 50 .
  • the cooling air flows through the heat exchange unit 42 of the oil cooler 40 , cools the hydraulic oil, and is discharged to the outside from the opening 71 a of the body section 71 of the shroud 70 .
  • the wall section 72 of the shroud 70 covers the header 41 A of the oil cooler 40 , and therefore blocks the flow of air directly sucked into the cooling fan 60 from around the header 41 A of the oil cooler 40 without flowing around the motor 30 . Therefore, the volume of cooling air that is supplied by the cooling fan 60 and flows around the motor 30 can be increased, and a decrease in the cooling efficiency of the motor 30 can be suppressed.
  • the motor cover 80 since the motor cover 80 has the shape that follows the shape of the motor 30 , the cooling air supplied by the cooling fan 60 flows along the shape of the motor 30 . Therefore, the volume of cooling air that flows around the motor 30 can be increased, and decrease in the cooling efficiency of the motor 30 can be suppressed.
  • the motor cover 80 since the motor cover 80 covers almost the entire space between the oil cooler 40 and the motor 30 , the motor cover 80 blocks the flow of air that does not flows around the motor 30 but is directly sucked into the cooling fan 60 from between the oil cooler 40 and the motor 30 . Therefore, the volume of cooling air supplied by the cooling fan 60 and flows around the motor 30 can be increased, and a decrease in the cooling efficiency of the motor 30 can be suppressed.
  • the cooling fan 60 can cool the drive circuit 51 of the controller in addition to the motor 30 and the oil cooler 40 .
  • a hydraulic unit 1 according to a second embodiment of the present invention has a configuration identical to that of the first embodiment except for the direction in which the cooling fan 60 blows cooling air and the shape of the shroud 70 .
  • the cooling fan 60 according to the second embodiment blows out cooling air from the front to the rear.
  • FIG. 7 is a perspective view of a shroud 170 according to the second embodiment as viewed from the rear
  • FIG. 8 is a plan view of the hydraulic unit 1 according to the second embodiment with a motor cover 80 removed.
  • components identical to those in FIGS. 1 to 6 are denoted by identical reference signs.
  • the shroud 170 includes a body section 171 having a rectangular shape, a vertical wall 172 that protrudes rearward from the body section 171 and extends in the Z direction, and a horizontal wall 173 that protrudes rearward from the body section 171 and extends in the Y direction, and a guide section 174 that is provided on the Y direction side with respect to the vertical wall 172 and on the Z direction side with respect to the horizontal wall 173 .
  • the guide section 174 of the shroud 170 is disposed to face one header 41 A of an oil cooler 40 .
  • the cooling fan 60 according to the present embodiment blows out cooling air from the front to the rear (see an arrow R 2 ).
  • the guide section 174 of the shroud 170 causes part of the cooling air supplied by the cooling fan 60 to flow around the one header 41 A of the oil cooler 40 and guides the part of the cooling air toward a heat sink 52 of a controller 50 (see an arrow R 3 ).
  • the guide section 174 of the shroud 170 guides the cooling air toward the heat sink 52 . Therefore, since part of the cooling air supplied by the cooling fan 60 is guided to the heat sink 52 , the cooling fan 60 can cool the drive circuit 51 in addition to a motor 30 and the oil cooler 40 .
  • a hydraulic unit 1 according to a third embodiment of the present invention has a configuration identical to that of the second embodiment except that a louver 90 is provided, and will he described with reference to FIGS. 1 to 8 .
  • FIG. 9 is a perspective view of a louver 90 .
  • the louver 90 is attached to the rear of an oil cooler 40 , and includes a first portion 90 a and a second portion 90 b continuous to the first portion 90 a.
  • the first portion 90 a of the louver 90 is configured to direct cooling air flowing from the front to the rear obliquely upward.
  • the second portion 90 b of the louver 90 is configured to direct the cooling air flowing from the front to the rear obliquely upward and in the Y direction. That is, the louver 90 directs part of the cooling air supplied by the cooling fan 60 to the Y direction side and the Z direction side.
  • the louver 90 guides part of the cooling air supplied by the cooling fan 60 to a heat sink 52 disposed on the Y direction side and the Z direction side with respect to a motor 30 .
  • the louver 90 guides part of the cooling air blown out from the cooling fan 60 toward the heat sink 52 Therefore, the cooling fan 60 can cool a drive circuit 51 of a controller in addition to the motor 30 and the oil cooler 40 .
  • cooling air supplied by the cooling fan 60 flows from the front to the rear; however, the present invention is not limited thereto, and the cooling air may flow from the rear to the front.
  • the motor cover 80 includes a plurality of sides that form a polygon as viewed in the X direction.
  • the shape of the motor cover 80 is not limited to the above shape, and may be another shape such as an arc shape that follows the shape of the motor 30 .
  • the controller 50 is disposed on the stand 11 .
  • the present invention is not limited to this, and the controller 50 may be installed below the stand.
  • the motor cover 80 may not be attached, or the stand 11 and the motor cover 80 may cover the motor 30 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Power Engineering (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
US16/648,223 2017-09-19 2018-07-18 Hydraulic unit Abandoned US20200263685A1 (en)

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JP2017178747A JP6521009B2 (ja) 2017-09-19 2017-09-19 油圧ユニット
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PCT/JP2018/026860 WO2019058732A1 (ja) 2017-09-19 2018-07-18 油圧ユニット

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JP7441073B2 (ja) 2020-02-26 2024-02-29 株式会社ジェイテクトフルードパワーシステム 油圧装置
JP7256430B2 (ja) * 2021-09-07 2023-04-12 ダイキン工業株式会社 油圧ユニット
KR102400043B1 (ko) * 2022-02-16 2022-05-19 주식회사 삼영필텍 폐윤활유 정화장치용 응축기
GB2625568A (en) * 2022-12-20 2024-06-26 Hyva Holding Bv A hydraulic cylinder assembly

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Publication number Priority date Publication date Assignee Title
JPH06147788A (ja) * 1992-11-02 1994-05-27 Aisin Chem Co Ltd ラジエータ冷却装置
JP3672153B2 (ja) * 1997-12-18 2005-07-13 株式会社不二越 空冷式油圧装置
JP2001133186A (ja) * 1999-10-29 2001-05-18 Toyo Radiator Co Ltd ラジエータのシュラウド取付構造
US7631496B2 (en) * 2005-09-28 2009-12-15 Parker-Hannifin Corporation Hydraulic unit with integral oil cooler
JP4983116B2 (ja) * 2006-06-30 2012-07-25 株式会社不二越 空冷式油圧発生装置
DE102013110974A1 (de) * 2013-03-19 2014-09-25 Hanning Elektro-Werke Gmbh & Co. Kg Reinigungsvorrichtung für Küchengeräte und Pumpensystem
DE102014002410A1 (de) * 2014-02-20 2015-08-20 Hydac Fluidtechnik Gmbh Kompaktaggregat

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JP6521009B2 (ja) 2019-05-29
WO2019058732A1 (ja) 2019-03-28
JP2019052619A (ja) 2019-04-04
EP3670913B1 (en) 2021-08-25

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