Classifications

• • 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
  • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
  • F15B21/04—Special measures taken in connection with the properties of the fluid
  • F15B21/042—Controlling the temperature of the fluid
  • F15B21/0423—Cooling
• • 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
  • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
  • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
  • F01P2050/00—Applications
  • F01P2050/02—Marine engines
  • F01P2050/06—Marine engines using liquid-to-liquid heat exchangers
• • 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
  • F15B2211/00—Circuits for servomotor systems
  • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
  • F15B2211/205—Systems with pumps
  • F15B2211/20507—Type of prime mover
  • F15B2211/20515—Electric motor
• • 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
  • F15B2211/00—Circuits for servomotor systems
  • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
  • F15B2211/205—Systems with pumps
  • F15B2211/20576—Systems with pumps with multiple pumps

Definitions

• the invention relates to a Fluidkuhlvomchtung as a unit with a drive motor - which drives a fan wheel and a fluid pump that promotes a first type of fluid in a fluid working group, which basically heats the fluid during operation, and leads to a heat exchanger from which the fluid returns cooled to the fluid working group.
• EP 0 968 371 B1 discloses a fluid cooling device as a unit with a drive motor which drives a fan wheel and a fluid pump, which takes the fluid (hydraulic medium) from an oil tank and conveys it to a hydraulic working circuit which heats the fluid, and to a heat exchanger leads from which the fluid returns cooled to the oil container.
• the oil container is trough-shaped, which, with its raised trough edges in the manner of a half-shell, at least partially encompasses the motor and the fluid pump.
• the known solution provides an oil tank of relatively large volume, which is nevertheless a compact design and is a component of the fluid cooling device and, based on the installation space left free from the tub edges, furthermore good accessibility of the motor and fluid pump unit is ensured for assembly and maintenance purposes ,
• a compact structure for the Fluid cooling device is also achieved that the mass components of the cooling device are evenly distributed, so that a stable position is achieved in operation even with appropriate own movements and vibrations.
• a control system and a method for controlling the speed of a large number of fans for cooling a large number of fluids in a work machine is disclosed in DE 100 62 534 A1, the speed of each fan being controlled in accordance with the individual heat dissipation requirements of the special heat transfer cores, powered by this particular fan, the present control system having a plurality of sensors positioned to sense the temperature of each of the plurality of fluids, each sensor operable to output a signal representative of the temperature thereof displays particular fluid, and an electronic control device coupled to the plurality of sensors for receiving signals therefrom that record the temperature of each of the plurality of fluids.
• the electronic control module can determine a corresponding temperature error for each of these fluids, and based on these temperature error signals and based on a certain logic programmed into the electronic control module, the control device outputs a signal to each of the plurality of Fans to individually control their speed, with each output signal indicating a desired fan speed for that particular fan.
• the object of the invention is to further improve the known solutions in such a way that several temperature control tasks can be carried out with just one fluid cooling device.
• a relevant object is achieved by a fluid cooling device with the features of claim 1 in its entirety.
• a second type of fluid can be removed from a storage tank and conveyed into a second fluid working group by means of a second fluid pump of the device, the second type of fluid leading through the first and a second heat exchanger returns to the storage tank, different temperature control tasks for separate fluid working cycles can be solved with just one fluid cooling device.
• the fluid cooling device according to the invention is particularly suitable for cooling electrical drives, such as linear motors, as are used, for example, in machining centers and machine tools, where the cooling of the electrical components takes place by means of a water-glycol mixture.
• Use motor spindles, servomotors and similar devices are particularly suitable for cooling electrical drives, such as linear motors, as are used, for example, in machining centers and machine tools, where the cooling of the electrical components takes place by means of a water-glycol mixture.
• the cooling medium in the form of the water-glycol mixture as a second type of fluid is passed on to a plate heat exchanger of the fluid cooling device and there cools in countercurrent the hydraulic medium of a hydraulic fluid working group, to which the machining center or the machine tool with its drivable components is also connected , As a result of the resulting heating, the water-glycol mixture is cooled via a second heat exchanger in the form of a lamella cooler before it returns to the storage tank of the fluid cooling device.
• the hydraulic working medium is usually cold and can then be warmed up using the more heated water-glycol medium.
• the only figure shows a rear view of the fluid cooling device as a structural unit in its installed position.
• the fluid cooling device shown as a whole in the figure has an electric drive motor 10 which drives a fan wheel 12 with individual fan blades. Furthermore, the drive motor 10 drives a fluid pump 14.
• the fan wheel 12 is accommodated in a fan wheel housing 16, which is preferably constructed from sheet metal parts. For safety, the fan wheel 12 is covered with a protective grille 18 in the rear area. Extending over the opening of the fan wheel housing 16 in the rear area is a flange part 20 provided with openings, on which the unit of the drive motor 10, fan wheel 12 and fluid pump 14 is mounted.
• a heat exchanger 22 in the form of a plate heat exchanger is arranged above the fan wheel housing 16.
• the fan wheel housing 16 is covered towards the front by a second heat exchanger 24 in the manner of a lamella cooler, which extends over the entire free opening cross section of the fan wheel opening 26.
• the fan wheel 12 is designed in the manner of an axial suction fan which, seen in the direction of viewing the figure, draws air from right to left through the fins of the second heat exchanger 24 and brings it backwards into the rear area in the direction of the drive motor 10.
• the fluid cooling device As an axial pressure fan.
• the fan wheel housing 16 is designed in the manner of a hollow box and is arranged in a vertical arrangement on a storage tank 30 which, in order to increase its fluid volume in the rear region, forms an enlarged tank chamber volume in the vertical direction.
• a submersible pump 32 Adjacent to the first drive motor 10, a submersible pump 32 is placed in the rear region of the storage tank 30, pump parts for a fluid withdrawal from the storage tank 30 projecting into the latter (not shown). Accordingly, the drive motor 34 of the submersible pump 32 is shown in the figure.
• the submersible pump 32 in question has a pump opening 36 for the removal of fluid from the storage tank 30.
• the pump opening 36 supplies a fluid working circuit (not shown in more detail) which is preferably used to cool an electrical linear drive of a machining center or a machine tool.
• a water-glycol mixture (second type of fluid) is used as the fluid, and after passing through the electrical consumer to cool it, the water-glycol mixture is introduced into the plate heat exchanger 22 via the submersible pump 32, specifically via a corresponding one Piping, not shown, which opens into the lower connection point 38 of the plate heat exchanger 22. From there, the second type of fluid (water-glycol mixture) flows through the plate heat exchanger 22 and leaves it via the lower discharge connection 40.
• the relevant discharge connection 40 is in turn connected to the second heat exchanger 24 in a fluid-carrying manner by means of a cross tube 42, and the water-glycol mixture heated in the plate heat exchanger 22 becomes in operation of the fan wheel 12 by means of cooling air in the second heat exchanger 24 Form of the fin cooler cooled by the water-glycol mixture passes through the second heat exchanger 24.
• the water-glycol mixture passes back through the connecting pipe 44 into the storage tank 30, which in this respect establishes the connection between the top of the storage tank 30 and the top of the second heat exchanger 24 in a fluid-carrying manner.
• the water-glycol mixture in question is available in a cooled state for a new circulation process by means of the submersible pump 32.
• the already mentioned fluid pump 14 serves to deliver a first type of fluid in the form of a hydraulic medium, such as hydraulic oil.
• a hydraulic medium such as hydraulic oil.
• the storage tank for the hydraulic oil is located outside the fluid cooling device shown in the figure, so that from there the fluid pump 14 sucks in the hydraulic oil via its suction opening 46 and passes it on to its pump line 48.
• the fluid line pump line 48 in this regard is in turn connected to the plate heat exchanger 22 above the discharge connection 40 via an inlet opening 50.
• the hydraulic oil enters the plate heat exchanger 22 via the relevant inlet opening 50 and flows through it in countercurrent to the water-glycol mixture coming from left to right.
• the hydraulic oil cooled or tempered in this way then returns via the outlet 52, which is arranged above the lower connection point 38, back to the hydraulic working circuit, not shown, to which the hydraulic unit and the hydraulic tank of the overall system are connected.
• the fluid cooling device according to the invention it is thus possible to cool heated hydraulic oil of a system via the plate heat exchanger 22, the cooling or tempering in question taking place in countercurrent via the water-glycol mixture which is stored in the storage tank 30 by the submersible pump 32 for a circulation is promoted.
• the water-glycol mixture heated in the plate heat exchanger 22 is then cooled in the further circulation via the lamella cooler 24.
• the fluid cooling device shown can also be provided for other applications in which temperature control tasks for different fluid circuits occur. There is also the possibility of installing or attaching separable tank chambers to the storage tank 30, so that fluid storage of further fluid media can take place via the storage tank of the fluid cooling device as a structural unit. In addition to the fluid pump 14 shown and the submersible pump 32, there is also the possibility of attaching further pumps in addition to further heat exchangers 22, 24 (not shown) in order to control more than two fluid media in terms of temperature.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Physics & Mathematics (AREA)
• Fluid Mechanics (AREA)
• Mechanical Engineering (AREA)
• Analytical Chemistry (AREA)
• Chemical & Material Sciences (AREA)
• Fluid-Pressure Circuits (AREA)
• Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
• Motor Or Generator Cooling System (AREA)
• Devices That Are Associated With Refrigeration Equipment (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Arrangement Or Mounting Of Propulsion Units For Vehicles (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Applications Claiming Priority (2)

Publications (2)

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Family Applications (1)

Country Status (7)

Families Citing this family (23)

Family Cites Families (12)

• 2003
  • 2003-07-10 DE DE10331216A patent/DE10331216B3/de not_active Withdrawn - After Issue
• 2004
  • 2004-03-05 DE DE502004006730T patent/DE502004006730D1/de not_active Expired - Lifetime
  • 2004-03-05 CN CNB2004800197847A patent/CN100494699C/zh not_active Expired - Fee Related
  • 2004-03-05 WO PCT/EP2004/002237 patent/WO2005005843A1/fr not_active Ceased
  • 2004-03-05 JP JP2006517975A patent/JP4523591B2/ja not_active Expired - Fee Related
  • 2004-03-05 US US10/563,876 patent/US7793707B2/en not_active Expired - Fee Related
  • 2004-03-05 EP EP04717626A patent/EP1654466B1/fr not_active Expired - Lifetime
  • 2004-03-05 AT AT04717626T patent/ATE391241T1/de not_active IP Right Cessation

Non-Patent Citations (1)

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