EP0870929A2 - Ascensseur à cable sous commande hydraulique - Google Patents

Ascensseur à cable sous commande hydraulique Download PDF

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Publication number
EP0870929A2
EP0870929A2 EP98105493A EP98105493A EP0870929A2 EP 0870929 A2 EP0870929 A2 EP 0870929A2 EP 98105493 A EP98105493 A EP 98105493A EP 98105493 A EP98105493 A EP 98105493A EP 0870929 A2 EP0870929 A2 EP 0870929A2
Authority
EP
European Patent Office
Prior art keywords
fluid
elevator according
hydraulic rope
rope elevator
working
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.)
Withdrawn
Application number
EP98105493A
Other languages
German (de)
English (en)
Other versions
EP0870929A3 (fr
Inventor
Georg Sebode
Dieter Klitzke
Manfred Mägerlein
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.)
Leistritz AG
Original Assignee
Leistritz AG
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 Leistritz AG filed Critical Leistritz AG
Publication of EP0870929A2 publication Critical patent/EP0870929A2/fr
Publication of EP0870929A3 publication Critical patent/EP0870929A3/fr
Withdrawn legal-status Critical Current

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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
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/003—Systems with load-holding valves
    • 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
    • F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
    • F15B7/005—With rotary or crank input
    • F15B7/006—Rotary pump input
    • 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
    • F15B2211/2053—Type of pump
    • F15B2211/20561—Type of pump reversible
    • 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
    • F15B2211/50—Pressure control
    • F15B2211/505—Pressure control characterised by the type of pressure control means
    • F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
    • F15B2211/50545—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using braking valves to maintain a back pressure

Definitions

  • the invention relates to a hydraulic rope elevator, comprising a drive device with a differential cylinder to which a working fluid can be applied for movement a load, in particular a load-bearing cabin.
  • the working principle of previously known hydraulic rope hoists with differential cylinders is such that the load to be moved is coupled to the cylinder piston rod, possibly with the interposition of a counterweight.
  • a working fluid is pressed in under pressure in a working chamber of the differential cylinder, which is formed by the upper ring cylinder chamber, in order to convey the cylinder piston downwards and thus the load upwards.
  • Working fluid is drawn out of the working area for an opposite movement, the movement being effected solely by the downward pulling weight of the load, for example a backpack-guided delivery basket.
  • Such a construction shows a number of disadvantages.
  • the engine power required for operation is very large, since the load to be compensated for by the working fluid pressure largely corresponds to the total load that has to be moved.
  • Another disadvantage is that with a counterweight this load can only be compensated for to a limited extent, since the load itself is responsible for the downward movement thereof, since a active "movement operation, controlled solely by the differential cylinder, is not possible for a downward movement.
  • the amount of fluid required for a movement of the piston between the two end positions is also very large, which results in a correspondingly large-sized design of the system.
  • the invention is therefore based on the problem of specifying a hydraulic rope elevator, which improves especially with regard to the performance required for operation is and enables more economical operation.
  • the differential cylinder in a funding is integrated for the fluid circuit having working fluid and has two work rooms, both depending on the required movement are exposed to working fluid.
  • a cylinder is therefore used in the hydraulic rope elevator according to the invention, in which both working spaces, namely the piston-side space and the ring-shaped one Fluid is applied to the piston rod space. That way it is particularly possible to work actively in both directions of movement, depending on the required movement, the fluid accordingly is fed to or removed from the respective work area. As a result the fluid circuit is therefore a much lower power requirement for the given movement.
  • Another notable advantage is that the Downward movement of the load also takes place actively in the elevator according to the invention, namely, in that fluid is pressed into the lower piston working space becomes.
  • the fluid circuit can be a partially closed circuit, in which a reserve fluid reservoir is integrated.
  • This advantageous training enables it is only to convey the working fluid between the two work rooms and the respective required difference quantity, which is either during the transfer is supplied, or must be removed, in a reserve fluid container to lead, which advantageously leads to only a small amount of differential oil be present in the correspondingly small sized reserve fluid container must, because this is the maximum resulting from the different working space volumes resulting difference.
  • each work area at least one fluid flow regulating barrier is connected upstream, each with a blocking element as a load holding valve or Lowering brake valve can be formed, each of which is a separate one Check valve can be assigned.
  • At least one blocking member optionally a load holding valve or lowering brake valve in a fluid line connecting both work spaces.
  • a further blocking member in particular a 2/2-way valve is provided, via which, depending on the Fluid delivery working fluid is feasible in the reserve fluid container.
  • a blocking member in particular a check valve, may be provided in order to prevent accidental fluid flow.
  • the funding is a motorized reversible Screw pump is.
  • the drive especially this reversible Screw pump expediently takes place by means of a frequency-controlled Electric motor, which the funding comprises according to the invention.
  • the usage a frequency-controlled drive has compared to known hydraulic rope hoists with conventional control the advantage that the state of the art Bypass control is no longer required because the excess volume flow is no longer in the acceleration and deceleration phases must be transported into the fluid tank against system pressure.
  • the differential cylinder has a gear ratio of 2: 1 because in this case, the volume flows flowing when the working fluid is conveyed around stand in such a relationship that the piston speed is the same is made possible both with upward and downward movement.
  • the reserve fluid container is in the invention Hydro rope elevator can be dimensioned much smaller due to the smaller Amount of fluid that has to be absorbed.
  • an im Alternative of the invention chosen with a view to optimizing the size of the overall system before that the size of the reserve fluid reservoir depending of the maximum differential volume of the two work rooms is selected.
  • the Reserve fluid container in comparison to the known prior art is small, it can be outside the shaft in which the Hydro rope elevator is arranged, may be provided, for example in a corresponding Control room or control cabinet. Of course there is parallel the possibility of also arranging the fluid container inside the shaft.
  • the Hydro rope hoist itself is advantageously a 1: 2 elevator where the movement distance of the cylinder piston corresponds to twice the distance of the moving load.
  • the invention relates to a method for operating a hydraulic rope elevator with a differential cylinder for moving a load coupled thereto, in particular a payload-receiving cabin, the differential cylinder with a working fluid.
  • the method according to the invention draws is characterized in that the one in a funding for the working fluid
  • Fluid circuit integrated differential cylinder two work rooms has, which are both acted upon by working fluid, which is dependent the required movement to the respective work area or is carried away from the respective work area.
  • FIG. 1 shows a hydraulic rope hoist according to the invention comprising a differential cylinder 1, to the piston rod 2 of which a counterweight 3 is coupled.
  • the counterweight 3 is assigned a first deflection roller 4, around which a rope 5, which hangs at the end at a fastening point 6, is guided and runs to a second deflection roller 7.
  • the rope 5 is attached at the other end to an attachment point 8 on the frame 9 of a cabin which is only partially shown.
  • This 1: 2 system shown enables operation in such a way that when the piston rod 2 of the differential cylinder 1 is moved by a distance x, the frame 9 and thus the cabin, ie the load, is moved 2x by a distance.
  • the differential cylinder 1 has two working spaces, as can be seen from FIG. 2.
  • a fluid inlet or outlet 10, 11 is provided at each work space, to each of which a feed line 12, 13 is connected.
  • the lines 12, 13 are connected to a control block 14, the Inner life "is explained in more detail with reference to FIG. 2.
  • a conveying means 15 with a reversible screw pump 16, which is driven by a frequency-controlled electric motor 17, is also integrated in the fluid circuit.
  • the motor is controlled by a frequency control 18 , which is followed by the elevator control 19.
  • the fluid circuit also shows a reserve fluid container 20, which is likewise connected to the control block 14 via corresponding lines 21, 22. To move the load, fluid is now conveyed within the fluid circuit depending on the direction of movement.
  • Fig. 2 The exact method of operation is shown in Fig. 2.
  • the differential cylinder is shown on the left 1 with its piston rod 2.
  • the two work rooms can also be seen 23 (upper, ring-shaped work space) and 24 (lower work space).
  • the thick dash-dotted line A gives the separation between the hydraulic rope elevator containing shaft and the cabinet from Fig. 1 again.
  • a first is in the supply line 13 to the lower working space 24
  • the supply line 12 to the upper working space 23 is in a connecting line 27 between the two fluid lines 12, 13, a second load holding valve 28 and, in Extension of the feed line 12, a check valve 29 assigned to it upstream.
  • the reserve fluid container 20, the two check valves 30, 31 are assigned.
  • the load holding valves 25 and 28 serve the differential cylinder gently and without pressure peaks respectively Accelerate or decelerate pressure fluctuations. These load holding valves 25, 28 are determined by the return pressure, the flow pressure and accordingly the control ratio regulated. You yourself have no influence on that Cylinder speed. For example, the piston rod 2 should now be lowered the working fluid from the working space 24 via the load holding valve 25 sucked off by means of the screw pump 16 and via the check valve 29 fed to the upper work area 23. The load holding valve 28 is in this case blocked.
  • the upper work area 23 only half of the working fluid has to be supplied, the other half flows of the volume sucked in by the screw pump 16 via a 2/2-way valve 32 in the reserve fluid container 20.
  • the valve 32 can be electrical or can be controlled hydraulically via a control line 33 shown in dashed lines.
  • the flow volume flow to the work space 23 is controlled by the frequency of the electric motor 17 is determined since, according to the frequency at the motor 17th a speed is set from which the particular pump 16 is pumped Volume flow results.
  • the amount of oil required is only a fraction compared to the previously known elevator, for which the maximum amount to be taken up by the reserve fluid container is given here
  • the hydraulic lifts according to the invention are considerably lower, and the cylinder pressures acting in each case are specified, the respective working chamber pressures (1st value for the piston-side work) for the differential cylinders according to the invention space, 2nd value for the work area on the ring surface) are listed as examples.
  • Hydraulic elevator 1 2 Hydraulics LZZ70 / 50 energy saving elevator Hydraulics LZZ85 / 70 energy saving elevator Load capacity (kg) 630 630 630 Speed (m / s) 1.0 1.0 1.0 1.0 Delivery head (m) 20th 12th 21 Engine power 28 5.5 5.5 Steadfastness 20.2 5.3 6.3 Acceleration performance 0.53 0.71 0.72 Power loss ⁇ (kW) 4.1 1.8 2.8 Amount of oil (l) 785 62 111 Weight drive (kg) in the shaft 550 240 460 Noise level [dB (A)] in the shaft 55 55 55 55 55 55 55 Pressure (bar) 36.5 21/41 17/33 Volume flow (l / min) 331 115 170

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Types And Forms Of Lifts (AREA)
  • Actuator (AREA)
EP98105493A 1997-04-11 1998-03-26 Ascensseur à cable sous commande hydraulique Withdrawn EP0870929A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19715224 1997-04-11
DE1997115224 DE19715224C2 (de) 1997-04-11 1997-04-11 Hydroseilaufzug

Publications (2)

Publication Number Publication Date
EP0870929A2 true EP0870929A2 (fr) 1998-10-14
EP0870929A3 EP0870929A3 (fr) 1998-11-04

Family

ID=7826268

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98105493A Withdrawn EP0870929A3 (fr) 1997-04-11 1998-03-26 Ascensseur à cable sous commande hydraulique

Country Status (2)

Country Link
EP (1) EP0870929A3 (fr)
DE (1) DE19715224C2 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19958257B4 (de) * 1999-12-03 2008-04-24 Bosch Rexroth Aktiengesellschaft Halboffener Hydraulikkreislauf
DE10228009B4 (de) * 2002-06-22 2008-05-29 Florian Prates Steuergerät für einen hydraulischen Aufzug mit Gegengewichtsausgleich
DE102014111359A1 (de) * 2014-05-20 2015-11-26 Wittur Holding Gmbh Verfahren zum Betrieb einer Fahrkorbbremseinheit
ES2907453T3 (es) * 2014-05-20 2022-04-25 Wittur Holding Gmbh Dispositivo de seguridad para operar un ascensor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2356380C2 (de) * 1973-11-12 1982-09-23 Peiner Maschinen- Und Schraubenwerke Ag, 3150 Peine Steuervorrichtung für motorhydraulische Greifer
DE2735310A1 (de) * 1977-08-05 1979-02-15 Florian Prates Indirekter hydraulischer antrieb mit gegengewicht fuer einen aufzug
DE2921446A1 (de) * 1979-05-26 1980-11-27 Robert Alexander Maubach Antrieb fuer hydraulikaufzug
DE3629032C2 (de) * 1986-08-27 1994-02-03 Haushahn C Gmbh Co Hebezeug, insbesondere Aufzug
JPS63106289A (ja) * 1986-10-22 1988-05-11 株式会社日立製作所 流体圧エレベ−タ
DE3920900A1 (de) * 1989-06-26 1991-01-03 Allweiler Ag Schraubenspindelpumpe
FR2671144B1 (fr) * 1990-12-28 1994-10-21 Faivre Duboz Denis Dispositif de commande d'un verin autonome.
DE4227001A1 (de) * 1992-08-14 1994-02-17 Rexroth Mannesmann Gmbh Hydraulischer Antrieb zur Nockenwellenverstellung einer Brennkraftmaschine
EP0660799A4 (fr) * 1992-08-31 1997-06-25 Captine Pty Ltd Ensemble a plusieurs cylindres et systeme d'entrainement a recuperation pour un ascenseur hydraulique.

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None

Also Published As

Publication number Publication date
DE19715224C2 (de) 1999-04-15
DE19715224A1 (de) 1998-10-15
EP0870929A3 (fr) 1998-11-04

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