EP4239195B1 - Wasserkraftwerk - Google Patents

Wasserkraftwerk

Info

Publication number
EP4239195B1
EP4239195B1 EP22159482.3A EP22159482A EP4239195B1 EP 4239195 B1 EP4239195 B1 EP 4239195B1 EP 22159482 A EP22159482 A EP 22159482A EP 4239195 B1 EP4239195 B1 EP 4239195B1
Authority
EP
European Patent Office
Prior art keywords
motor
hydraulic
pump
tank
control unit
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.)
Active
Application number
EP22159482.3A
Other languages
English (en)
French (fr)
Other versions
EP4239195A1 (de
Inventor
Olivier Verbeyst
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.)
Individual
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP22159482.3A priority Critical patent/EP4239195B1/de
Publication of EP4239195A1 publication Critical patent/EP4239195A1/de
Application granted granted Critical
Publication of EP4239195B1 publication Critical patent/EP4239195B1/de
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
    • 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
    • F04B53/001—Noise damping

Definitions

  • Such hydraulic power plants provide hydraulic power to different types of hydraulic machines for different applications, including applications requiring lifting or steering, on a self-propelled vehicle of any kind.
  • the self-propelled vehicle is preferably a street sweeper/cleaner.
  • Other examples of the type of self-propelled vehicle that can be equipped with such a hydraulic power unit may be a snowplow with a snowplow powered by the hydraulic power unit, a handling vehicle such as forklift trucks powered by the hydraulic power unit, or a person transport vehicle such as an ambulance for disabled persons equipped with a lift and/or a person swivel device powered by the hydraulic power unit.
  • the hydraulic power unit can also be called a hydraulic group and generally includes a hydraulic circuit and at least one motor-pump group comprising a motor and a hydraulic pump driven by the motor.
  • a hydraulic circuit can include one or more valves and/or one or more distribution blocks and/or one or more hydraulic fluid filters, each of these components potentially connected by hydraulic fluid lines.
  • the hydraulic circuit transmits hydraulic power to one or more hydraulic machines.
  • a hydraulic power unit incorporating such an electric motor is conventionally called an electro-hydraulic power unit.
  • an electro-hydraulic power unit Generally, the operation of such an electro-hydraulic power unit requires a complex and bulky cooling system.
  • it is known to provide a liquid cooling system with a radiator dedicated to cooling the electric motor and coupled to it.
  • the present invention proposes a compact hydraulic power unit with a reduced level of vibration.
  • the present invention relates to a hydraulic power unit comprising a hydraulic circuit equipped with a reservoir containing a hydraulic fluid and at least one pump unit comprising a first part, a second part, a motor, and a hydraulic pump driven by the motor.
  • the pump unit is positioned in the reservoir such that the first part of the pump unit is immersed in the hydraulic fluid.
  • the hydraulic power unit further comprises a temperature probe positioned in the reservoir so as to be able to measure the temperature of the hydraulic fluid
  • the motor pump unit(s) each comprise a temperature sensor positioned in the respective motor pump unit so as to be able to measure the temperature of the motor of the respective motor pump unit.
  • the hydraulic pump is included in the first part of the motor-pump unit.
  • the motor is an electric motor, preferably a three-phase permanent magnet electric motor.
  • the hydraulic power unit constitutes an electro-hydraulic power unit.
  • the hydraulic pump can be a gear hydraulic pump.
  • the motor comprises a rotating machine and an electronic control device capable of controlling the rotating machine, the rotating machine preferably being part of the first part of the motor-pump group and/or the electronic control device preferably being part of the second part of the motor-pump group.
  • the second part of the motor-pump unit emerges from the hydraulic fluid.
  • the hydraulic pump has an inlet orifice immersed in the hydraulic fluid contained in the reservoir.
  • the hydraulic pump includes an outlet conduit, the outlet conduit preferably emerging from the reservoir.
  • the reservoir has an inlet port
  • the hydraulic circuit also including a radiator through which the hydraulic fluid flows and which is positioned in the hydraulic circuit upstream of the inlet port of the reservoir.
  • the tank includes elastic mounting studs allowing the tank to be attached to a vehicle chassis.
  • the temperature probe of the hydraulic power unit is positioned in the reservoir preferably so as to be able to measure the temperature of the hydraulic fluid arriving from the radiator into the reservoir.
  • the hydraulic power unit 10 is preferably a hydraulic power unit 10 for a self-propelled vehicle, such as a self-propelled street sweeper, also known as a sweeper.
  • a self-propelled vehicle such as a self-propelled street sweeper, also known as a sweeper.
  • a self-propelled vehicle such as a self-propelled street sweeper, also known as a sweeper.
  • a vehicle is generally equipped with a combustion or electric engine and one or more rotating brushes in contact with the ground, as well as suction and waste collection systems, and includes a cab for the driver.
  • Such vehicles are typically Used in urban or industrial environments for cleaning large areas. The driver sits in the cab, where they have access to the vehicle's steering controls as well as the controls for the cleaning equipment.
  • the vehicle is preferably a four-wheeled vehicle but can generally have at least three wheels.
  • such a hydraulic power plant 10 is a set of hydraulic components enabling the supply of hydraulic fluid to a network or hydraulic system at a chosen flow rate.
  • the hydraulic power unit 10 comprises a hydraulic circuit equipped with a reservoir 40 containing a hydraulic fluid and at least one motor-pump unit 20.
  • a reservoir 40 containing a hydraulic fluid
  • at least one motor-pump unit 20 In the Figures 1 And 4 to 7 , the hydraulic power plant 10 according to the embodiment including the reservoir 40 is shown, whereas in the figure 2 The hydraulic power unit 10, according to the embodiment, is shown without the reservoir 40.
  • figure 3 is a detailed representation of the motor pump group 20 according to the embodiment.
  • the motor-pump unit 20 comprises a first part 22, a second part 24, a motor 26 and a hydraulic pump 30 driven by the motor 26.
  • the motor-pump unit 20 is positioned in the reservoir 40 so that the first part 22 of the motor-pump unit 20 is immersed in the hydraulic fluid contained in the reservoir 40.
  • the second part 24 of the pump unit 20 can emerge from the hydraulic fluid.
  • the pump unit can therefore be arranged so that the first part 22 is immersed in the hydraulic fluid and the second part 24 emerges from the hydraulic fluid.
  • the motor-pump unit 20 may include a casing 21, in which the motor 26 and/or the hydraulic pump 30 is/are incorporated.
  • the hydraulic pump 30 may be included in the first part 22 of the motor-pump unit 20.
  • the pump unit 20 and/or the casing 21 may have an essentially cylindrical shape.
  • the casing 21 may have an opening in the first part 22 of the pump unit 20, from which the first part 22 partially emerges.
  • the hydraulic pump 30 may emerge from the opening in the casing 21.
  • the hydraulic power unit 10 may comprise a plurality of motor-pump units 20, each of the motor-pump units 20 being arranged in the reservoir 40 so that the first part 22 of each motor-pump unit 20 is immersed in the hydraulic fluid contained in the reservoir 40.
  • the hydraulic power unit 10 according to the preferred embodiment comprises four motor-pump units 20.
  • the reservoir 40 of the hydraulic power unit 10, according to the preferred embodiment, is essentially rectangular in shape.
  • the pump units 20 can be arranged in a line and/or in the same orientation within the reservoir 40.
  • the pump units 20 can be arranged in a line that is horizontal when the hydraulic power unit 10 is installed in the vehicle.
  • the hydraulic power unit 10 can, for example, have one, two, three, or four pump units 20.
  • the reservoir 40 can be provided with a cover 42, from which emerges the second part 24 of each motor-pump unit 20.
  • the first part 22 of each motor-pump unit 20 is positioned below the cover 42.
  • the cover can have an essentially flat shape.
  • the tank 40 can be positioned in the vehicle so that the motor-pump units 30 are oriented horizontally in the vehicle and/or so that the cover 42 forms a top face of the tank 40.
  • the hydraulic fluid can preferably consist of an incompressible mineral oil.
  • a hydraulic circuit can include one or more valves and/or one or more distribution blocks and/or one or more hydraulic fluid filters, each of these components being connected by hydraulic fluid lines.
  • the hydraulic circuit transmits hydraulic power to one or more hydraulic machines.
  • the hydraulic power unit 10 is capable of supplying hydraulic power to various types of hydraulic machines for different applications, such as a street sweeper.
  • the motor 26 is an electric motor, preferably an alternating current electric motor, in particular a three-phase motor.
  • the motor 26 may also be a three-phase electric motor with a solid magnet. permanent.
  • the motor 26 can be speed controlled by a frequency inverter connected to the motor 26.
  • the hydraulic power unit 10 constitutes an electro-hydraulic power unit.
  • the rotating machine 28 of the motor 26 of each motor-pump group 20 can be provided with a winding.
  • the motor 26 may include a rotating machine 28 and an electronic control device capable of controlling the rotating machine 28, the rotating machine 28 preferably being part of the first part 22 of the motor-pump unit 20 and/or the electronic control device preferably being positioned outside the casing 21 of the motor-pump unit 20.
  • the electronic control device may be in the form of a frequency inverter located away from the casing 21 and centralized to control the motor 26 of each motor-pump unit 30.
  • the hydraulic pump 30 may have an inlet port 32 immersed in the hydraulic fluid contained in the reservoir 40.
  • the inlet port 32 may be disposed at one end of an inlet conduit 31 of the hydraulic pump 30.
  • the motor-pump unit 20 is arranged in the reservoir 40 so that the inlet port 32 is immersed in the hydraulic fluid.
  • the immersed inlet port 32 is positioned below a hydraulic fluid level N in the reservoir 40.
  • the hydraulic pump 30 may include an outlet conduit 34, the outlet conduit 34 preferably emerging from the reservoir 40.
  • the reservoir cover 42 may be provided with an opening through which the outlet conduit 34 can pass.
  • the outlet conduit may emerge from the cover 42, preferably perpendicular to the cover 42.
  • the cover may be provided with such an opening for each outlet conduit 34 and/or for each pump unit 20.
  • the outlet conduit 34 can be connected to the hydraulic circuit to supply the hydraulic circuit with hydraulic power.
  • the reservoir 40 may have an inlet port 48.
  • the inlet port may be connected to the hydraulic circuit.
  • the hydraulic circuit may also be provided with a supply manifold 52 and a radiator 50 through which the hydraulic fluid flows and which is positioned in the hydraulic circuit upstream of the inlet port 48 of the reservoir 40.
  • the radiator 50 allows the hydraulic fluid to be cooled before it reaches the manifold 52 and then the reservoir 40.
  • the reservoir 40 may also include elastic mounting blocks 44, 46 for attaching the reservoir 40 to a vehicle chassis. These elastic mounting blocks 44, 46 may include lateral elastic mounting blocks 44 and lower elastic mounting blocks 46. These elastic mounting blocks 44, 46 help reduce the transmission of vibrations from the hydraulic power unit 10 to the vehicle, particularly to the vehicle chassis.
  • the hydraulic power unit 10 may also include a temperature probe positioned in the reservoir 40 so as to measure the temperature of the hydraulic fluid.
  • the temperature probe may be positioned in the reservoir 40 so as to measure the temperature of the hydraulic fluid flowing from the radiator 50 to the reservoir 40.
  • the temperature probe may be placed on a hydraulic fluid collection manifold at the outlet of the radiator 50.
  • each pump unit(s) 20 may include a temperature sensor 27 positioned within the respective pump unit(s) so as to be capable of measuring the temperature of the motor 26 of the respective pump unit(s), preferably the winding of the rotating machine 28 of the motor 26 of each respective pump unit(s).
  • the temperature sensor 27 may be directly connected to the core of the respective motor 26 to measure the internal temperature of the motor 26.
  • the temperature sensor 27 may preferably be part of the second part 22 of the respective pump unit(s).
  • the temperature sensor 27 allows us to know not the average temperature of the hydraulic fluid in the reservoir 40, but the exact temperature of each motor 26 at its core. Knowing these temperatures makes it possible to select the currents flowing through the motors 26 independently, thus protecting each motor 26 individually in case of overheating.
  • the hydraulic power unit 10 of this application eliminates the need for a dedicated cooling system.
  • the hydraulic power unit 10 of this application is particularly compact in its dimensions.
  • the integration of the pump unit 20 within the reservoir and the immersion of the pump unit in the fluid are also significant advantages.
  • the hydraulic system allows the fluid to be used to cool the motor 26. This submerged integration ensures optimal operation of the pump unit 20, which is free from cavitation problems during operation and provides more space for other functions.
  • immersing the pump unit 20, and in particular the motor 26, in the hydraulic fluid reduces the noise generated by the pump unit 20 during operation.
  • the fluid previously cooled in the radiator 50 can return to the reservoir 40.
  • the hydraulic fluid will recover heat from the motor 26 and/or the hydraulic pump 30 and thus cool it.
  • This active engine cooling can be controlled according to the engine temperature 26 recorded through the temperature sensor 27.
  • the hydraulic power unit 10 will be able to present a higher service factor to cope with the most severe applications.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)

Claims (10)

  1. Hydraulikaggregat, umfassend einen Hydraulikkreislauf, der mit einem Behälter (40) versehen ist, der eine Hydraulikflüssigkeit enthält, und wenigstens eine Motorpumpengruppe (20) mit einem ersten Teil (22), einem zweiten Teil (24), einem Motor (26) und einer vom Motor (26) angetriebenen Hydraulikpumpe (30), wobei die Motorpumpengruppe (20) derart in dem Behälter (40) positioniert ist, dass der erste Teil (22) der Motorpumpengruppe (20) in die Hydraulikflüssigkeit eingetaucht ist, dadurch gekennzeichnet, dass sie ferner einen in dem Behälter (40) positionierten Temperaturfühler umfasst, so dass sie in der Lage ist, die Temperatur der Hydraulikflüssigkeit zu messen, und dass die Motorpumpengruppe(en) (20) jeweils einen Temperatursensor umfasst/umfassen, der derart in der jeweiligen Motorpumpengruppe (20) positioniert ist, dass er in der Lage ist, die Temperatur des Motors (26) der jeweiligen Motorpumpengruppe (20) zu messen.
  2. Hydraulikaggregat nach Anspruch 1, dadurch gekennzeichnet, dass die Hydraulikpumpe (30) in dem ersten Teil (22) der Motorpumpengruppe (20) enthalten ist.
  3. Hydraulikaggregat nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass der Motor (26) ein Elektromotor ist.
  4. Hydraulikaggregat nach Anspruch 3, dadurch gekennzeichnet, dass der Motor (26) eine rotierende Maschine (28) und eine elektronische Steuervorrichtung (27) umfasst, die in der Lage ist, die rotierende Maschine (28) zu steuern, wobei die rotierende Maschine (28) bevorzugt Teil des ersten Teils (22) der Motorpumpengruppe (20) ist und/oder die elektronische Steuervorrichtung (27) bevorzugt Teil des zweiten Teils (24) der Motorpumpengruppe (20) ist.
  5. Hydraulikaggregat nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der zweite Teil (24) der Motorpumpengruppe (20) aus der Hydraulikflüssigkeit herausragt.
  6. Hydraulikaggregat nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass die Hydraulikpumpe (30) eine Einlassöffnung (32) aufweist, die in die im Behälter (40) enthaltene Hydraulikflüssigkeit eintaucht.
  7. Hydraulikaggregat nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Hydraulikpumpe (30) eine Auslassleitung (34) aufweist, wobei die Auslassleitung (34) bevorzugt aus dem Behälter (40) herausragt.
  8. Hydraulikaggregat nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Behälter (40) eine Einlassöffnung (48) aufweist, wobei der Hydraulikkreislauf ferner einen Radiator (50) umfasst, durch den die Hydraulikflüssigkeit fließt und der im Hydraulikkreislauf stromaufwärts der Einlassöffnung (48) des Behälters (40) positioniert ist.
  9. Hydraulikaggregat nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der Behälter (40) elastische Befestigungsstifte (44, 46) aufweist, die die Befestigung des Behälters (40) an einem Fahrzeugrahmen ermöglichen.
  10. Hydraulikaggregat nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Temperaturfühler derart in dem Behälter (40) positioniert ist, dass er die Temperatur der vom Radiator (50) zum Behälter (40) strömenden Hydraulikflüssigkeit messen kann.
EP22159482.3A 2022-03-01 2022-03-01 Wasserkraftwerk Active EP4239195B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22159482.3A EP4239195B1 (de) 2022-03-01 2022-03-01 Wasserkraftwerk

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22159482.3A EP4239195B1 (de) 2022-03-01 2022-03-01 Wasserkraftwerk

Publications (2)

Publication Number Publication Date
EP4239195A1 EP4239195A1 (de) 2023-09-06
EP4239195B1 true EP4239195B1 (de) 2025-11-19

Family

ID=80623820

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22159482.3A Active EP4239195B1 (de) 2022-03-01 2022-03-01 Wasserkraftwerk

Country Status (1)

Country Link
EP (1) EP4239195B1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988989A (en) * 1997-12-08 1999-11-23 Fenner Fluid Power, Inc. Compact hydraulic power unit having a reservoir closed by a manifold having a hydraulic circuit
US7182583B2 (en) * 2004-02-06 2007-02-27 Sauer-Danfoss Inc. Electro-hydraulic power unit with a rotary cam hydraulic power unit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19854417A1 (de) * 1998-11-25 2000-05-31 Still Gmbh Arbeitsmaschine, insbesondere Flurförderzeug
US6615866B2 (en) * 2001-09-13 2003-09-09 Morrell Incorporated Hydraulic power assembly having a removable top
DE102017127675B4 (de) * 2017-11-23 2023-03-23 HAWE Altenstadt Holding GmbH Hydraulische Druckversorgungseinheit
DE102019215975A1 (de) * 2019-10-17 2021-04-22 Deere & Company Hydraulische Anordnung
CN115053074A (zh) * 2019-12-14 2022-09-13 Kti液压系统公司 具有潜水电机的液压动力单元

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5988989A (en) * 1997-12-08 1999-11-23 Fenner Fluid Power, Inc. Compact hydraulic power unit having a reservoir closed by a manifold having a hydraulic circuit
US7182583B2 (en) * 2004-02-06 2007-02-27 Sauer-Danfoss Inc. Electro-hydraulic power unit with a rotary cam hydraulic power unit

Also Published As

Publication number Publication date
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