EP0822334A2 - Pompe à engrenages - Google Patents

Pompe à engrenages Download PDF

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Publication number
EP0822334A2
EP0822334A2 EP97112978A EP97112978A EP0822334A2 EP 0822334 A2 EP0822334 A2 EP 0822334A2 EP 97112978 A EP97112978 A EP 97112978A EP 97112978 A EP97112978 A EP 97112978A EP 0822334 A2 EP0822334 A2 EP 0822334A2
Authority
EP
European Patent Office
Prior art keywords
relief valve
pressure
gear pump
pressure relief
pump
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
EP97112978A
Other languages
German (de)
English (en)
Other versions
EP0822334B1 (fr
EP0822334A3 (fr
Inventor
Paul Lütkenhaus
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.)
Neudecker & Jolitz & Co GmbH
Original Assignee
Neudecker & Jolitz & Co 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 Neudecker & Jolitz & Co GmbH filed Critical Neudecker & Jolitz & Co GmbH
Publication of EP0822334A2 publication Critical patent/EP0822334A2/fr
Publication of EP0822334A3 publication Critical patent/EP0822334A3/fr
Application granted granted Critical
Publication of EP0822334B1 publication Critical patent/EP0822334B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C14/00—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations
    • F04C14/24—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
    • F04C14/26—Control of, monitoring of, or safety arrangements for, machines, pumps or pumping installations characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05F—DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION; CHECKS FOR WINGS; WING FITTINGS NOT OTHERWISE PROVIDED FOR, CONCERNED WITH THE FUNCTIONING OF THE WING
    • E05F15/00—Power-operated mechanisms for wings
    • E05F15/50—Power-operated mechanisms for wings using fluid-pressure actuators

Definitions

  • the invention relates to a hydraulic gear pump, in particular for door actuators according to the preamble of the main claim.
  • Hydraulic gear pumps are used in door actuators successfully used for a long time.
  • This hydraulic Gear pumps are powered by a drive, for example an electric motor, driven and pumping under pressure hydraulic fluid towards one with a piston provided cylinder, which in turn with further connection elements, such as a toggle, with the one to be operated Door is connected.
  • a drive for example an electric motor
  • the hydraulic fluid e.g. B.
  • the hydraulic fluid is then fed through a suction line fed back to the hydraulic gear pump.
  • the door drives are designed that a swinging door does not last until the same opening speed as in their middle range of movement has, but the door is about to be reached their maximum opening position with reduced speed moved to an abrupt hard braking of the Avoid the door when it reaches its maximum opening position. This also applies when a door is closed to to avoid loud and material slamming the door. During these phases the door will not move demands the full pump capacity of the hydraulic gear pump. A reduction in the pump output via a corresponding one Adjustment of the pump drive, e.g. B. one Electric motor, would be due to the required control devices costly and therefore disadvantageous.
  • the known door actuators a pressure relief valve on the gear pumps is downstream to a harmful increase in the Avoid hydraulic fluid pressure if not the full pump power is required. In doing so, they bring about Pressure relief valves that with an increase in the Gear pump of hydraulic fluid pumped pressure a pressure relief valve opens and in the sense of a Bypass hydraulic fluid from the pressure line to the Suction line redirects to cause, on the one hand, the pressure the hydraulic fluid is reduced and also due to the return of the hydraulic fluid a continuous Run of the gear pump can take place.
  • GB 2 295 422 describes a fuel pump for fuel injection an internal combustion engine in which a pressure relief valve is integrated, however this is Pressure relief valve in a fixed part of the pump built-in, d. H. the pump housing is strongly on adapted to the installation of the valve. This is disadvantageous if Pumps can be built with or without a valve, because designed two completely different pump housings and have to be manufactured.
  • a hydraulic pump is known from US Pat. No. 4,828,462, which also has a pressure relief valve, but that not located in the immediate vicinity of the drive gears is, so that the space required for this is high.
  • the invention has for its object a pump device to create especially for door operating devices, which have a pressure relief valve and which regarding of the pump devices that do not have a pressure relief valve exhibit minimal design changes.
  • a door operating device 1 is a detail of a door operating device 1, which essentially consists of a Electric motor 2 and an associated hydraulic Gear pump 3 exists. Connect to gear pump 3 other devices for door operation, such as a cylinder provided with a piston and a of which operated door knee lever, which in turn with the one to be operated Door is connected, these latter facilities however, not shown for reasons of clarity are.
  • the electric motor 2 receives its electrical via a cable 4 Tension; via a motor shaft 5 and a coupling piece 6 the motor 2 connected to the gear pump 3, the Coupling 6 engages in a pump shaft 7.
  • the gear pump 3 consists essentially of a housing 8, in which two intermeshing gears are arranged are, only one gear 9 can be seen in FIG. 1.
  • On the sides of the gears 9 are delimited by bearing bodies 10 and 11, which receive the shafts 12 and 14 of the gear wheels 9.
  • These bearing bodies 10, 11 are essentially eight-shaped or glasses-like shape, as can be seen from FIGS. 2 and 3 is and have a sealing and storage function.
  • the gear pump 3 has a suction channel 15 for the hydraulic fluid on the gear pump 3 again flows in and a pressure line 16, in which the under pressure conveyed liquid medium is removed.
  • the flow direction of the hydraulic medium is illustrated by arrows in Fig. 1.
  • the electric motor 2 runs when the door operating device is in operation 1 always with the same power and moves over the motor shaft 5, the clutch 6 and the pump shaft 7, the gears 9, so that the hydraulic fluid through the pressure line 16th convey out of the pump area. If need hydraulic fluid is not high, for example if the Door is almost completely open and is switched so that it turns only moving slowly will result in more hydraulic fluid promoted as the door operating device 1 needed and the Liquid pressure rises.
  • a pressure relief valve is used 17 proposed that in this embodiment in a bearing body 11 is provided.
  • the pressure relief valve consists essentially of a ball 18 over a Spring 19 is loaded.
  • a ball 18 can also other sealing element can be used, e.g. B. a cone or the like.
  • the valve 17 is between the pressure side and the suction side the gear pump 3 arranged and connects them Pumps when needed.
  • the setting of the pressure relief valve 17 is in this Embodiment possible and takes place via a screw 21, which is provided on its outside with a thread 22, the combs with a thread of the screw seat 23.
  • the Screw 21 presses the spring 19, and another Screwing in the screw 21 places a greater load on the ball 18, so that the pressure relief valve 17 only at one opens higher pressure; of course, in reverse
  • the pressure relief valve 17 is also set in this way be that there is already a lower pressure in the Pressure line 16 opens.
  • the pressure relief valve 17 proposed here can also be trained in a different way, such. B. can instead the chosen connection ball / spring also another Appear device that is elastic and if the pressure in the pressure channel 16 is too high, the bypass channel 20 releases.
  • the valve can also be set to other way.
  • Pressure relief valve 17 only preset in the gear pump 3 to integrate, as can be seen from Fig. 3.
  • the pressure relief valve 17 can not have a Screw are regulated, but the setting of the Pressure relief valve 17 is preset at the factory, to save costs.
  • the ball 18 and the spring 19 were only used in the gear pump 3.
  • the pressure relief valve 17 is fixed.
  • pressure relief valve 17 it is also possible to separate the pressure relief valve 17 to control, e.g. B. on compressed air, or an externally controlled Use solenoid valve. This is beneficial to e.g. B. to open the valve when starting the pump to by Lowering the fluid pressure a lighter Allow the pump to start.
  • the bearing body 10 or 11 with an integrated pressure relief valve equip, d. H. as a fully integrated Unit so that the pump housing does not change at all must now if a gear pump 3 with a pressure relief valve should be equipped, since one with this Embodiment on a bore of the pump housing for a spring 19 according to FIGS. 1 to 3 can be dispensed with.
  • glasses “have the advantage that the bypass channel that is created when the valve is opened is extremely short. This is advantageous because a particularly rapid pressure equalization is brought about when the valve is opened, so that damage due to overpressure is avoided as quickly as possible .

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Rotary Pumps (AREA)
  • Details Of Reciprocating Pumps (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Power-Operated Mechanisms For Wings (AREA)
EP97112978A 1996-08-02 1997-07-29 Pompe à engrenages Expired - Lifetime EP0822334B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19631202 1996-08-02
DE19631202A DE19631202A1 (de) 1996-08-02 1996-08-02 Hydraulische Zahnradpumpe, insbesondere für eine Türbetätigungsvorrichtung

Publications (3)

Publication Number Publication Date
EP0822334A2 true EP0822334A2 (fr) 1998-02-04
EP0822334A3 EP0822334A3 (fr) 1998-11-25
EP0822334B1 EP0822334B1 (fr) 2003-09-17

Family

ID=7801575

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97112978A Expired - Lifetime EP0822334B1 (fr) 1996-08-02 1997-07-29 Pompe à engrenages

Country Status (2)

Country Link
EP (1) EP0822334B1 (fr)
DE (3) DE19631202A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19933864C2 (de) * 1999-07-23 2003-05-28 Neudecker & Jolitz Gmbh & Co Türöffner
CN111119637A (zh) * 2019-12-23 2020-05-08 北京电子工程总体研究所 气动式舱体门盖开启机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD221798A1 (de) 1984-03-12 1985-05-02 Schwermasch Liebknecht Veb K Zahnradpumpe mit einbezogenem ueberdruckventil
US4828462A (en) 1987-12-10 1989-05-09 Dana Corporation Pressure detecting system for a hydraulic device
GB2295422A (en) 1994-11-22 1996-05-29 Bosch Gmbh Robert Fuel feed pump for an i.c. engine fuel injection pump

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2758548A (en) * 1950-08-24 1956-08-14 Edward A Rockwell Rotary fluid displacement device and mechanism therefor
US3671143A (en) * 1970-11-05 1972-06-20 Trw Inc Flat side valve for pressure balanced power steering pump with improved aspirator action
FR2393956A2 (fr) * 1977-06-07 1979-01-05 Hydro Meca Pompe hydraulique pour l'alimentation d'un dispositif de commande
DE3225549A1 (de) * 1982-07-08 1984-01-12 Robert Bosch Gmbh, 7000 Stuttgart Pumpe, insbesondere zum foerdern von kraftstoff fuer brennkraftmaschinen
DE3320596A1 (de) * 1983-06-08 1984-01-05 Neudecker & Jolitz GmbH & Co KG, 4423 Gescher Motorpumpenkompakteinheit bestehend aus elektromotor und aussenverzahnter zahnradpumpe kompl. in einem gehaeuse
US4902202A (en) * 1987-07-29 1990-02-20 Hydreco, Inc. Variable discharge gear pump with energy recovery
US5397219A (en) * 1993-06-21 1995-03-14 C. Cretors & Company Integral liquid pump and drainback valve
DE4444819A1 (de) * 1994-12-15 1996-06-20 Bayerische Motoren Werke Ag Schmierölpumpe einer Brennkraftmaschine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD221798A1 (de) 1984-03-12 1985-05-02 Schwermasch Liebknecht Veb K Zahnradpumpe mit einbezogenem ueberdruckventil
US4828462A (en) 1987-12-10 1989-05-09 Dana Corporation Pressure detecting system for a hydraulic device
GB2295422A (en) 1994-11-22 1996-05-29 Bosch Gmbh Robert Fuel feed pump for an i.c. engine fuel injection pump

Also Published As

Publication number Publication date
DE59710749D1 (de) 2003-10-23
EP0822334B1 (fr) 2003-09-17
EP0822334A3 (fr) 1998-11-25
DE19631202A1 (de) 1998-02-05
DE29713614U1 (de) 1997-10-30

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