EP0616969A1 - Ascenseur à entraînement hydraulique - Google Patents

Ascenseur à entraînement hydraulique Download PDF

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Publication number
EP0616969A1
EP0616969A1 EP93105026A EP93105026A EP0616969A1 EP 0616969 A1 EP0616969 A1 EP 0616969A1 EP 93105026 A EP93105026 A EP 93105026A EP 93105026 A EP93105026 A EP 93105026A EP 0616969 A1 EP0616969 A1 EP 0616969A1
Authority
EP
European Patent Office
Prior art keywords
reservoir
gas
oil
elevator
air
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Withdrawn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
EP93105026A
Other languages
German (de)
English (en)
Inventor
Walter Isenmann
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.)
Inventio AG
Original Assignee
Inventio 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 Inventio AG filed Critical Inventio AG
Priority to EP93105026A priority Critical patent/EP0616969A1/fr
Priority to CA 2120049 priority patent/CA2120049A1/fr
Publication of EP0616969A1 publication Critical patent/EP0616969A1/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Withdrawn legal-status Critical Current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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/26—Supply reservoir or sump assemblies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B9/00—Kinds or types of lifts in, or associated with, buildings or other structures
    • B66B9/04—Kinds or types of lifts in, or associated with, buildings or other structures actuated pneumatically or hydraulically
    • 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
    • F15B21/06—Use of special fluids, e.g. liquid metal; Special adaptations of fluid-pressure systems, or control of elements therefor, to the use of such fluids

Definitions

  • the present invention relates to a hydraulically driven elevator with an elevator car, which can be raised and lowered by means of a travel piston connected to it and guided in a hydraulic cylinder, and a pump which conveys hydraulic fluid from a reservoir into the hydraulic cylinder against a check valve and via the travel piston drives the elevator car and a controllable lowering valve through which hydraulic fluid flows back from the hydraulic cylinder into the reservoir and the elevator car lowers.
  • Hydraulically driven elevators of this type with hydraulic cylinders sunk in the ground and centrally arranged, have been in use for years. It has already happened that such hydraulic cylinders have rusted through, with the leaked hydraulic oil contaminating the groundwater and resulting in extremely high follow-up costs.
  • the invention is therefore based on the object of proposing a hydraulically driven elevator, in which it is prevented that environmental pollution can arise from leaking hydraulic oil.
  • Biodegradable vegetable oil instead of hydraulic oil, it can be ruled out that environmental pollution and / or contamination of the groundwater can occur if the oil leaks.
  • Biodegradable vegetable oil also has the disadvantage that the oil degradation process begins during operation. As a result of the heating, the oil absorbs oxygen from the air, which is renewed with each stroke of the elevator by the quantity corresponding to the volume of the travel piston. The oil spoils prematurely, it becomes rancid, begins to stink, saponifies and forms foam.
  • This natural degradation process of pure vegetable oil without chemical additives is countered here by closing the otherwise open reservoir for operation with a gas-tight cover and filling a neutral gas, e.g.
  • the single figure shows a schematically illustrated, hydraulically driven elevator, with a closed reservoir drawn in elevation with a gas bag and the necessary gas lines.
  • 1 denotes an elevator car.
  • the elevator car 1 is built on a travel piston 2 of a hydraulic cylinder 3 .
  • the hydraulic cylinder 3 is connected by a first pipeline 4 to a pump 6 driven by an electric motor 5 .
  • a check valve 7 is installed in the first pipeline 4 .
  • a second pipeline 8 provided with a lowering valve 9 , connects the hydraulic cylinder 3 directly to a reservoir 10 .
  • a suction line 11 of the pump 6 also opens into the reservoir 10 .
  • the reservoir 10 is through a cover 12 airtight.
  • the reservoir 10 is equipped with an exhaust port 13 with an exhaust tap 14 and with an intake port 15 with an intake tap 16 .
  • a second tap 17 and a gas bag serving as a gas reservoir 18 which hangs in an open container 19 , are additionally arranged on the supply air connection 15 .
  • the device described above works as follows: The hydraulic unit is filled as usual, but with a biodegradable oil and the travel piston 2 is lowered to the lowest position.
  • the reservoir 10 is sealed gas-tight with the cover 12 , the exhaust air tap 14 and the supply air tap 16 are opened and the second tap 17 on the supply air connector 15 is closed after the gas reservoir 18 connected there has been pressed out of air.
  • a cartridge with neutral gas, for example nitrogen, is attached to the supply air tap 16 and the air present in the reservoir 10 is blown out through the exhaust air tap 14 .
  • the exhaust valve is then closed and the second valve 17 to the gas storage 18 is opened in order to fill the gas storage 18 with nitrogen with the cartridge.
  • the supply air tap 16 is now closed again and the hydraulically driven elevator is ready for operation.
  • the pump 6 driven by the electric motor 5 , with the lowering valve 9 closed, conveys oil which is taken from the reservoir 10 via the check valve 7 into the hydraulic cylinder 3 and the travel piston 2 moves with it the elevator car 1 upwards.
  • the oil level in the reservoir 10 lowers due to the oil withdrawn from the reservoir 10 , the nitrogen present being sucked into the reservoir 10 from the gas reservoir 18 at the same time in order to compensate for the pressure.
  • the elevator car 1 is lowered, oil flows from the hydraulic cylinder 3 back into the reservoir 10 via the opened lowering valve 9 .
  • the increasing oil level displaces nitrogen from the reservoir 10 back into the gas storage 18 . This means that the oil no longer comes into contact with the oxygen in the air during operation, it remains usable longer does not spoil and there is no odor in the vicinity of the elevator due to expelled, polluted air.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Automation & Control Theory (AREA)
  • Structural Engineering (AREA)
  • Types And Forms Of Lifts (AREA)
EP93105026A 1993-03-26 1993-03-26 Ascenseur à entraînement hydraulique Withdrawn EP0616969A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP93105026A EP0616969A1 (fr) 1993-03-26 1993-03-26 Ascenseur à entraînement hydraulique
CA 2120049 CA2120049A1 (fr) 1993-03-26 1994-03-25 Ascenseur a commande hydraulique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP93105026A EP0616969A1 (fr) 1993-03-26 1993-03-26 Ascenseur à entraînement hydraulique

Publications (1)

Publication Number Publication Date
EP0616969A1 true EP0616969A1 (fr) 1994-09-28

Family

ID=8212747

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93105026A Withdrawn EP0616969A1 (fr) 1993-03-26 1993-03-26 Ascenseur à entraînement hydraulique

Country Status (2)

Country Link
EP (1) EP0616969A1 (fr)
CA (1) CA2120049A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102583137A (zh) * 2011-01-13 2012-07-18 杨崇恩 气液动能电梯升降机构
DE102017102278A1 (de) 2017-02-06 2018-08-09 International Baler Service GmbH & Co. KG Pressvorrichtung

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110043085A (zh) * 2019-03-19 2019-07-23 武汉智象机器人有限公司 低能耗智能停车升降驱动装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003659A (en) * 1958-09-11 1961-10-10 Clark Equipment Co Collapsible reservoir
DE1456364A1 (de) * 1966-11-02 1968-12-12 Inst F Foerdertechnik Hydrostatischer Antrieb mit Gegengewichtssystem,insbesondere fuer Aufzuege
WO1991019913A1 (fr) * 1990-06-15 1991-12-26 Dorma Gmbh + Co. Kg Fluide amortisseur
US5076146A (en) * 1990-07-18 1991-12-31 Otis Elevator Company Method and apparatus for protecting a cylinder of an hydraulic elevator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3003659A (en) * 1958-09-11 1961-10-10 Clark Equipment Co Collapsible reservoir
DE1456364A1 (de) * 1966-11-02 1968-12-12 Inst F Foerdertechnik Hydrostatischer Antrieb mit Gegengewichtssystem,insbesondere fuer Aufzuege
WO1991019913A1 (fr) * 1990-06-15 1991-12-26 Dorma Gmbh + Co. Kg Fluide amortisseur
US5076146A (en) * 1990-07-18 1991-12-31 Otis Elevator Company Method and apparatus for protecting a cylinder of an hydraulic elevator

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
"HYDRAULIC GEAR RACK ASSISTS LIFTCABIN HOIST.", MACHINE DESIGN., PENTON MEDIA, CLEVELAND, OH., US, vol. 61., no. 14., 6 July 1989 (1989-07-06), US, pages 48., XP000039138, ISSN: 0024-9114 *
HYDRAULIC PNEUMATIC MECHANICAL POWER Bd. 30, Nr. 358, Oktober 1984, MORDEN GB Seiten 281 - 283 E. LAPPALAINEN ET AL. 'Vegetable oils as hydraulic fluid' *
öLHYDRAULIK UND PNEUMATIK Bd. 30, Nr. 7, 1986, MAINZ DE Seiten 529 - 531 K.D. AENGENEYNDT ET AL. 'Neue umweltfreundliche Hydraulikfl}ssigkeiten' *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102583137A (zh) * 2011-01-13 2012-07-18 杨崇恩 气液动能电梯升降机构
CN102583137B (zh) * 2011-01-13 2016-07-06 杨崇恩 气液动能电梯升降机构
DE102017102278A1 (de) 2017-02-06 2018-08-09 International Baler Service GmbH & Co. KG Pressvorrichtung

Also Published As

Publication number Publication date
CA2120049A1 (fr) 1994-09-27

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