EP3356675A1 - Groupe électrohydraulique compact - Google Patents

Groupe électrohydraulique compact

Info

Publication number
EP3356675A1
EP3356675A1 EP16769993.3A EP16769993A EP3356675A1 EP 3356675 A1 EP3356675 A1 EP 3356675A1 EP 16769993 A EP16769993 A EP 16769993A EP 3356675 A1 EP3356675 A1 EP 3356675A1
Authority
EP
European Patent Office
Prior art keywords
tank
compact unit
unit according
electric motor
cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP16769993.3A
Other languages
German (de)
English (en)
Other versions
EP3356675B1 (fr
Inventor
Andreas Guender
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3356675A1 publication Critical patent/EP3356675A1/fr
Application granted granted Critical
Publication of EP3356675B1 publication Critical patent/EP3356675B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • 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
    • F04B23/021—Pumping installations or systems having reservoirs the pump being immersed in 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
    • F04B53/08—Cooling; Heating; Preventing freezing
    • 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
    • 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
    • F15B21/044—Removal or measurement of undissolved gas, e.g. de-aeration, venting or bleeding

Definitions

  • the invention relates to an electro-hydraulic compact unit according to the
  • Type ABS KG "with the number RE 51013, Edition: 11.14 is an electrohydraulic modular aggregate disclosed in which eg motor, pump, filter etc. can be easily varied and combined.
  • the use of standard products makes the concept cost effective if high variance in the component constellation is required.
  • the aggregate has a high assembly cost, e.g. in the piping. If a large number of identical units is needed, the modular design can not develop the advantages mentioned above. Other disadvantages are that the aggregate is difficult to clean because it has a very branched geometry. Noise-emitting components such as the electric motor are on the outside, which is why the unit can be noisy. In particular, results from the modular design poor use of space and thus a large space. Often, these units are installed in machine tools. Compactness is particularly important here. In the printed data sheet of the applicant "clamping and drive module type
  • UPE 2 "with the number RD 51142, Edition: 02.11 is a clamping unit shown in a compact design.
  • the disadvantage of this is that the electric motor is a sub-oil engine, which causes splashing losses and oil swirling and thereby air in the oil transmits the lower oil engine vibrations over the hydraulic oil as structure-borne sound to the tank wall, which is why such a compact unit is noisy.
  • the invention is based on the object to provide a compact unit, in which the noise emissions of the drive unit are reduced.
  • the claimed electro-hydraulic compact unit has a drive unit having an electric motor and a hydrostatic pump, via the pump pressure fluid from a tank can be sucked and conveyed to a high pressure side consumer port.
  • the tank has an inner wall which delimits a space which is separate from the pressure medium and thus dry, in which the electric motor is arranged completely and the pump at least partially. This splash losses and turbulence of the pressure medium and thereby air entry into the pressure medium are avoided.
  • the electric motor is complete and, moreover, the pump is at least partially encased by the tank, so that the noise emissions of the drive unit are reduced.
  • a particularly good sound insulation can be achieved if the entire drive unit, including the entire pump is covered by the tank.
  • a low-cost standard motor is advantageously used, e.g. only one protection class IP22 has, because over the surrounding tank a higher protection class is reached.
  • the inner wall of the tank is spaced apart from the drive unit, then there is a sound-insulating circumferential distance between the tank and the drive unit, which can be easily filled with air, for example, device technology.
  • the tank has a lid to which the tank is attached, and to which also the drive unit - preferably via a damping element, such as a cork plate - is attached.
  • electrical lines for the electric motor extend through the lid.
  • the electric motor is attached to the cover and the pump on the electric motor, so that the electric motor is fixed on its side facing away from the pump on the side of the lid.
  • the tank is preferably inexpensively made of plastic, e.g. as an injection molding or blow molding part.
  • plastic e.g. as an injection molding or blow molding part.
  • the inner wall is substantially circular-cylindrical, wherein the tank also has a substantially circular-cylindrical, smooth outer wall.
  • the tank has a circular cross-section and is easy to clean.
  • a circulating flow of the flowing back pressure medium and its degassing can be achieved.
  • the volume utilization of the tank can also be optimized.
  • the two walls may be tubular or tubular and be clamped by at least one tie rod between the lid and a floor.
  • the two walls can be formed integrally with a bottom.
  • the tank is mug-like despite its interior.
  • the two walls, the bottom, the lid and a center axis of the electric motor or the entire drive unit may be concentric with each other.
  • the outer circumference of the electric motor or of the entire drive unit is also substantially circular-cylindrical, the sound-insulating distance to the inner wall of the tank can be minimized and the compact unit according to the invention can be made as small as possible.
  • lamellae are provided in the tank through which the pressure medium is returned, they can absorb and dissipate the heat of the back-flowing pressure medium.
  • the cooling of the pressure medium when the lamellae via pressure medium heat pipes or pressure medium réellesiphons that penetrate the lid, are conductively connected to other fins heat, which are arranged on a side facing away from the tank top of the lid.
  • the other fins deliver the heat directly to the ambient air.
  • the pressure-medium heatpipes or pressure-medium heat siphons are used to cool the pressure medium and are overflowed or dipped into it.
  • the motor heatpipes or motor heat siphons serve to cool the electric motor and are therefore conductively connected to this heat.
  • the further fins are preferably cooled by at least one fan. This is - in contrast to the last-mentioned prior art -independently driven by the rotational speed of the electric motor of the drive unit.
  • the electric motor may also have cooling fins which release the engine heat to the air, which flows through the distance formed between the drive unit and the inner wall of the tank.
  • the lid may be a cold plate or cold plate, which also absorbs and releases heat.
  • the frequency converter or its power electronics are cooled particularly effectively when it is conductively connected to the heat exchanger at the upper side of the cooling plate facing away from the tank.
  • no cabinet for the drive is needed and the wiring is reduced compared to the prior art.
  • the frequency converter may also have a housing with cooling fins and preferably a separate fan.
  • the frequency converter and the other fins with their fan can be accommodated in a housing. This provides protection against dust and splash water and this can increase the protection class. Furthermore, the housing may be designed such that the air of the fan is guided over the further disk packs and a lateral evasion of the air is prevented.
  • the central axes of the circular cylindrical tank and the electric motor preferably coincide and are oriented vertically, so that the compact unit has a vertical structure.
  • FIG. 1 shows a circuit diagram of an inventive compact unit according to a first embodiment
  • FIG. 2 shows in a perspective longitudinal section a compact unit according to the invention according to a second exemplary embodiment
  • FIG. 3 shows a perspective view of some components of the compact unit from FIG. 2,
  • Figure 4 is a perspective longitudinal section of an inventive compact unit according to a third embodiment
  • FIG. 1 shows a circuit diagram of the compact unit according to the invention according to a first embodiment.
  • the compact unit has a drive unit with an electric motor M and a hydrostatic pump 1.
  • the electric motor M is operated by a frequency converter 2.
  • the compact unit has a tank T for pressure means, e.g. Hydraulic oil on.
  • the frequency converter 2 is provided between an electrical power supply 4 and an electrical line 6, so that the electric motor M is frequency-controlled and thus speed-controlled via the electrical line 6. Via a shaft 8 so that the pump 1 is driven by the electric motor M variable speed.
  • the pump 1 sucks via a suction line 10 pressure fluid from the tank T and promotes this via a pressure or supply line 12 to a high pressure side consumer port 14 of the compact unit.
  • a consumer is connected via valves, the z. B. may be a cylinder.
  • the consumer and the valves are shown only symbolically and form a hydraulic system 16.
  • the pressure medium flows from the consumer 16 back into the compact unit. More specifically, the pressure medium flows from the consumer port 18 via a first return line 20 and via a second return line 21 to the tank T, wherein in the first return line 20, a return filter 38 is provided. In machine tools usually two return lines 20, 21 are required. One that can withstand a back pressure caused by the return filter 38, and a another, which leads into the tank T free of backpressure.
  • a leakage connection of a rotary feedthrough is connected to the machine tool spindle.
  • the pressure medium, which flows in the rotary feedthrough to the tank T may have no pressure medium backpressure and is guided under a gradient pressure-free in the tank T.
  • All arranged within an aggregate boundary 22 components are located on or in the compact unit, all traversing lines are via interfaces (electrical connectors, hydraulic connections at pressure line or supply line 12 to a consumer and return lines 20, 21 by the consumer) executed.
  • the pressure p in the supply line 12 is measured by a pressure sensor 30 which is close to the pump, the signal is transmitted to the frequency converter 2 with an integrated PID controller for a constant pressure control. This then regulates the frequency of the power supply of the electric motor M via the line 6. This ensures that, depending on the volume flow in the supply line 12, which is determined by the hydraulic system 16, the pressure in the supply line 12 is kept constant. If the hydraulic system 16 requires more volumetric flow, e.g. because its load must be moved very fast, the frequency converter 2 accelerates the drive unit according to the control circuit (pressure sensor-frequency converter-electric motor-pump) and keeps the pressure p constant.
  • the control circuit pressure sensor-frequency converter-electric motor-pump
  • a level sensor 24, a pressure sensor 25 for the pressure medium and a filter contamination sensor 28 for the return filter 38 are provided. These are electrically connected to an I / O board, which is integrated in a housing 26 of the frequency converter 2. These signals are e.g. used for an emergency stop at too low pressure medium level, too high temperature and dirty return filter 38.
  • the sensors 24, 25, 28 are evaluated analogously or have warning functions which are triggered at defined threshold values. The warnings may be made by the frequency converter 2 e.g. via a visual display as a (yellow glowing) LED 34 output. An emergency stop signal can be displayed via the (red) LED 34 and a trouble-free operation via the (green) LED 34.
  • a data interface 36 which analog (eg 4-20mA, 0-10V), digital (low-high) or a BUS interface to a higher-level interface (eg a control of the supplied from the compact unit machine tool) are passed.
  • analog eg 4-20mA, 0-10V
  • digital low-high
  • BUS BUS interface
  • a discharge device 32 is provided on the compact unit, which, e.g. can be designed as a ball valve. Between tank T and discharge device 32, a transparent hose is installed, which serves as a level indicator 39. To control the level in the tank T, the discharge device 32 is held at the top of the compact unit and in particular the tank T and opened there, so that the level in the tank T can be displayed via the hose (communicating vessels). Optimally, the discharge device 32 is opened at the top of the tank T connected in the interior thereof, so that dirt entry is prevented by the ambient air. Furthermore, an inlet and vent filter 43 is provided on the tank T.
  • FIG. 2 shows in a perspective longitudinal section a compact unit according to the invention according to a second exemplary embodiment. Shown is the internal electric motor M with directly flanged pump 1.
  • the drive unit thus formed is surrounded by the annular tank T, which is preferably made of plastic, e.g. produced by injection molding.
  • the suction line 10 which extends in the radial direction between the tank T and the pump 1
  • the pump 1 sucks pressure medium from a lower region of the tank T and outputs it at a higher pressure level via the supply line 12 to the following hydraulic Systemlö (both not shown in Fig. 2, see Fig. 1).
  • the pressure medium passes through a return bore and via the return lines 20, 21 (both not shown in Fig. 2, see Fig. 1) back into the tank T.
  • the drive unit is mounted vertically and is suspended from vibration by a damping element 40 (e.g., a cork plate) on a cover 44 with mounting screws (not shown). Furthermore, between the mounting screws and the cover 44 there are also vibration damping elements (not shown), e.g. Plastic sleeves provided.
  • the lid 44 defines the upper area of the tank T and closes it.
  • the tank T has an inner wall 46 and an outer wall 48, which are concentric with each other, and between which an annular bottom 42 is integrally formed.
  • the tank T is cup-like and has an annular cross-section with an interior.
  • the cover 44 is circular disk-shaped and the housing 26 of the frequency converter 2 has a circular cylindrical shape.
  • the outer wall 48 of the tank T and the cover 44 and the housing 26 have approximately the same diameter, so that the compact unit has a total of a circular cylindrical shape.
  • a circumferential distance 50 is provided, which is filled with ambient air.
  • a ventilator such as e.g. a bore or the inlet and vent filter 43 integrated in the cover 44, possibly in combination with a filling device (filling and venting filter ELF), can be sucked from the environment into the tank T in the event of a pendulum volume caused by the hydraulic system 16 be delivered to the environment.
  • a filling device filling and venting filter ELF
  • the electric motor M is supplied with electrical energy by means of the electric line 6 (see FIG. This is guided by a hole in the cover 44 of the arranged at the top of the lid 44 frequency converter 2 to the electric motor M on the underside of the lid 44.
  • FIG. 3 shows the second embodiment of the compact unit according to the invention of Figure 2, wherein the pump 1, the tank T, the frequency converter 2 and the housing 26 have been omitted.
  • the cooling of the second embodiment of the compact unit according to the invention can be seen.
  • the tank T two disc packs 144 are arranged, each consisting of a plurality of semicircular lamellae. All fins are connected via respective pressure medium heat pipes 146, which extend through the cover 44 on to the side facing away from the tank T top of the lid 44, with further plate packs 148 conductively connected.
  • There are per tank-side plate set 144 two more plate packs 148 are provided, the fins are approximately quarter-circular.
  • the electric motor M via four (not shown) engine heat pipes, which extend through the cover 44 on the side facing away from the electric motor M top of the lid 44, connected to other plate packs 150 conductively.
  • the waste heat of the back-flowing pressure medium and the electric motor M is transported to the other plate packs 148, 150 to the side facing away from the tank T and the electric motor M top of the lid 44 and discharged from there via the local further lamellar packages 148, 150 to the ambient air.
  • the further disk packs 148, 150 eg two) fan 152 may be provided between the further disk packs 148, 150 (eg two) fan 152 may be provided.
  • the cover 44 is formed as a cooling plate and penetrated by a cooling water channel, of which only the two ports 154 can be seen.
  • Figures 4 and 5 each show a third embodiment of the compact unit according to the invention in a sectional perspective view, wherein the sectional planes of the two figures are rotated by 90 degrees to each other.
  • the tank T is formed by an inner tube 156, an outer tube 158, the bottom 42 and the lid 44.
  • the cover 44 and the bottom 42 are connected with tie rods 160 with respective tie bolts 162, the two tubes 156, 158 being clamped between the base 42 and the cover 44.
  • the cooling is slightly changed from the second embodiment.
  • the frequency converter 2 is cooled with its power electronics via (eg two) own fan 152, which suck in an air flow through vents 164 of the housing 26, the frequency converter 2 and its power electronics by flowing through the interior and flow through its heat sink 166 cool, and again through the ventilation slots 164 exit from the housing 26.
  • the electric motor M is cooled by a fan 168 integrated in the interior of the compact unit or by the tank T, which is arranged concentrically to the electric motor M.
  • the fan 168 also sucks in air through the ventilation slots 164 of the housing 26, first cools the pressure medium over the arranged on the outer circumference of the lid 44 further disk sets 148, which is connected by means of pressure medium heat pipes 146 with the disk sets 144 of the tank T, and then cools the electric motor M via the cooling fins.
  • the warm air finally exits through ventilation slots 170 on an underside of the bottom 42 in the radial direction again from the compact unit.
  • the fan 168 may also be installed directly on the shaft 8.
  • a hydrostatic compact unit with an electric motor and a pump that promotes pressure fluid from a tank to a consumer port.
  • the tank is circular, and the electric motor and the pump are jointly enclosed by this tank.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Abstract

L'invention concerne un groupe hydrostatique compact comprenant un moteur électrique et une pompe qui achemine un fluide hydraulique d'un réservoir vers un raccordement de récepteur. Le réservoir est de forme annulaire, et entoure à la fois le moteur électrique et la pompe.
EP16769993.3A 2015-10-02 2016-09-21 Groupe électrohydraulique compact Active EP3356675B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015219091.9A DE102015219091A1 (de) 2015-10-02 2015-10-02 Elektrohydraulisches Kompaktaggregat
PCT/EP2016/072344 WO2017055145A1 (fr) 2015-10-02 2016-09-21 Groupe électrohydraulique compact

Publications (2)

Publication Number Publication Date
EP3356675A1 true EP3356675A1 (fr) 2018-08-08
EP3356675B1 EP3356675B1 (fr) 2021-06-02

Family

ID=56979564

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16769993.3A Active EP3356675B1 (fr) 2015-10-02 2016-09-21 Groupe électrohydraulique compact

Country Status (8)

Country Link
US (1) US10605236B2 (fr)
EP (1) EP3356675B1 (fr)
JP (1) JP6820326B2 (fr)
KR (1) KR102685711B1 (fr)
CN (1) CN108138756B (fr)
DE (1) DE102015219091A1 (fr)
TW (1) TWI751980B (fr)
WO (1) WO2017055145A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3507504B1 (fr) * 2016-09-05 2023-05-10 Robert Bosch GmbH Réservoir et groupe électro-hydraulique compact comprenant un réservoir

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USD861733S1 (en) * 2016-04-11 2019-10-01 Robert Bosch Gmbh Hydraulic power unit
DE102017222761A1 (de) 2017-12-14 2019-06-19 Robert Bosch Gmbh Hydraulische Versorgungseinrichtung
DE102018112835A1 (de) * 2018-05-29 2019-12-05 Fsp Fluid Systems Partner Holding Ag Hydrauliksystem, Hydraulikeinheit, Fahrzeug, Verfahren und Verwendung
CN118043562A (zh) * 2021-08-05 2024-05-14 伊利诺斯工具制品有限公司 用于材料测试的液压动力单元
CN114704511B (zh) * 2022-02-21 2022-12-27 燕山大学 液压油箱及液压系统
DE102023200427B3 (de) * 2023-01-20 2024-03-07 Scheuerle Fahrzeugfabrik Gmbh System und Verfahren zum Ausgleich von Hydraulikflüssigkeit sowie Schwerlast-Transportfahrzeug

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Publication number Priority date Publication date Assignee Title
EP3507504B1 (fr) * 2016-09-05 2023-05-10 Robert Bosch GmbH Réservoir et groupe électro-hydraulique compact comprenant un réservoir

Also Published As

Publication number Publication date
TW201725324A (zh) 2017-07-16
KR20180063100A (ko) 2018-06-11
CN108138756B (zh) 2020-09-08
DE102015219091A1 (de) 2017-04-06
US20180274526A1 (en) 2018-09-27
CN108138756A (zh) 2018-06-08
JP2018530699A (ja) 2018-10-18
WO2017055145A1 (fr) 2017-04-06
EP3356675B1 (fr) 2021-06-02
US10605236B2 (en) 2020-03-31
JP6820326B2 (ja) 2021-01-27
KR102685711B1 (ko) 2024-07-18
TWI751980B (zh) 2022-01-11

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