EP2912323A1 - Système hydraulique comprenant au moins un ensemble déplaceur hydrostatique - Google Patents

Système hydraulique comprenant au moins un ensemble déplaceur hydrostatique

Info

Publication number
EP2912323A1
EP2912323A1 EP13783847.0A EP13783847A EP2912323A1 EP 2912323 A1 EP2912323 A1 EP 2912323A1 EP 13783847 A EP13783847 A EP 13783847A EP 2912323 A1 EP2912323 A1 EP 2912323A1
Authority
EP
European Patent Office
Prior art keywords
hydraulic
oil
filter
tank
hydraulic system
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Withdrawn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
EP13783847.0A
Other languages
German (de)
English (en)
Inventor
Alexander WOHLERS
John Otto
Alexander Nenno
Werner Wilkendorf
Viktor Josef Lauer
Norbert Sann
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.)
Hydac Filtertechnik GmbH
Original Assignee
Hydac Filtertechnik 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 Hydac Filtertechnik GmbH filed Critical Hydac Filtertechnik GmbH
Publication of EP2912323A1 publication Critical patent/EP2912323A1/fr
Withdrawn legal-status Critical Current

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
    • 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
    • F04B53/20—Filtering
    • 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
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • 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
    • 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
    • F15B2211/40—Flow control
    • F15B2211/405—Flow control characterised by the type of flow control means or valve
    • 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
    • F15B2211/40—Flow control
    • F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
    • F15B2211/41563—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and a return line
    • 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
    • F15B2211/60—Circuit components or control therefor
    • F15B2211/61—Secondary circuits
    • F15B2211/611—Diverting circuits, e.g. for cooling or filtering

Definitions

  • Hydraulic icsystem with at least one hydrostatic displacer unit
  • the invention relates to a hydraulic system, with at least one hydrostatic displacer unit, a filter device for the fi ltration of the jewei age displacer unit flowing through hydraulic oil and with a discharge device that filters the at the jewei time displacer unit in operation Anfal lounging laxative and a tank.
  • hydrostatic displacement units such as axial piston machines
  • hydrostatic displacement units have a certain amount of leakage at the machine elements in the contact position.
  • the leakage volume flow composed of these leakages accumulates in the machine housing and is generally discharged via a leak oil inlet into the tank associated with the relevant hydraulic system, wherein a separate leakage oil filter is usually provided for each hydrostatic displacement unit.
  • the leak oil filters can only be designed as protective filters with a very low filter fineness. Therefore, leak oils that have a high content of ultrafine contaminants are filtered insufficiently, which impairs system purity.
  • the invention has the object to provide a hydraulic iksystem available, in which the removal of accumulating leaking oils takes place in a particularly vortei liger way. According to the invention this object is achieved by a hydraulic system having the features of claim 1 in its entirety.
  • the invention accordingly provides that the discharge device for accumulating leakage oil has a pumping device, by means of which the leakage oil to a suitable for feeding into the filter device pressure level. can be brought.
  • a pumping device opens up the advantageous possibility of exploiting the main fi lter present in the system, which is designed for optimum fi lter fineness for the operation of the system, even for fi lters of the leakage oil flow. Own Leckölfi lter, which are interpreted as a protective filter low filter fineness, in order not to cause an inadmissible increase in pressure in the housings of the machines generating the leakage oil flow, are eliminated.
  • the pressure level of the leak oil generated by means of the pumping device allows it to be fed into the main filter of the system, even if it builds up a certain dynamic pressure which, depending on the degree of soiling of the filter and the operating temperature of the hydraulic oil, can have a level of a few bar and in height is imitated only by the opening pressure of the main filter usually located bypass valve l.
  • a plurality of oil-producing hydrostatic devices may be in communication with the pumping device, so that no separate oil filters are required.
  • the Main return of the system is arranged on the tank.
  • a bypass valve located between the raw and the clean side can be present in the main return;
  • the solution according to the invention is also suitable for systems without such sudschlagventi l.
  • the associated with its pressure side with the raw side of the remindlauffi age pump device via a Venti lanowski with the leak oil connection of jewei time displacer unit in combination can be designed as a safety circuit, the üfs ls occurring disturbing influences of pumping device to Leckölanschl adoren or prevented by these to the pumping device.
  • valve assembly between the suction side of the pumping means and the respective leak oil port may have a check valve protecting it against a given oil pressure.
  • the arrangement may advantageously be such that the valve arrangement has a suction line arranged between the suction side of the pumping device and the tank and a control element which permits a suction flow at a negative pressure level at the pumping device.
  • a check valve may be provided, but could be provided in the Nachsaugpfad also a diaphragm, a throttle or a pipe with a correspondingly small cross-section.
  • the valve arrangement furthermore has a check valve, by means of which the respective leak oil connection is secured to the tank via the filter screen located in the suction path.
  • a check valve by means of which the respective leak oil connection is secured to the tank via the filter screen located in the suction path.
  • a jet pump Such may be operated by a Druckanschl the system with Hydraulic oil, which flows together with the discharged leak oil to the raw side of the return filter.
  • the return filter 6 is preferably attached to the tank 8 or installed as an in-tank filter in this.
  • the opening pressure of which is adjusted to the height of the back pressure on the backflow 6 permissible dynamic pressure is that can be a few bar.
  • the at the feed point on the Rohseite18 of the return filter 6 pending pressure level Therefore, it can be higher than the permissible housing pressure at the leakage oil connections 1 2, 14 of the hydraulic pump 2 or hydraulic motor 4.
  • the discharge device 10 has a the leak to the pressure level of the raw side 1 8 of remindlauffi age 1 6 lifting pumping device, which is gebi in the present example by a jet pump 26.
  • a valve assembly 32 is connected, via which the suction-side Anschl uss 30 of the jet pump 26 with the drain line 24 is connectable.
  • the Venti lanaku 32 has in the line branch between Sauganschl uss 30 of the jet pump 26 and the drain line 24, a check valve 34, which the Leckölan- circuits 12, 14 and thus the machine housing of hydraulic pump 2 and hydraulic motor 4 against a l Störfal at the jet pump 26 ensures excessive pressure.
  • the check valve 34 is set to an opening pressure of about 0.5 bar, which corresponds to a permissible housing pressure at the leak oil ports 1 2, 14.
  • the Venti lanaku 32 as a safety valve to a check valve 36, which secures the drain line 24 via a strainer 40 to the tank 8 out.
  • the check valve 36 is set to an opening pressure of about 0.8 bar.
  • the valve assembly 32 has a Nachsaugpfad 38, which has a check valve 42 as a Nachsaugventil between the Sauganschuss 30 of the jet pump 26 and the Siebfi lter 40 is inserted.
  • Anstel le of provided as a control of the Nachsaugpfades 38 check valve 42 could be another type, a flow resistance performing control can be provided, for example, a diaphragm, a throttle or a pipe performance with small-sized cross-section.
  • the pressure level of the leakage oil flow from a prevailing in the drain line 24 low pressure level, which corresponds to a low housing pressure of the connected displacer units, to a in the feed line 28 on the pressure side of the jet pump 26th bring prevailing pressure level at which the leakage oil flow can be fed together with the emerging from the jet pump 26 propellant stream in the crude side 18 of serving as the main working filter return filter 6.
  • the leakage oil flow is thus directed through a filter designed for optimum filter fineness, so that even extremely fine soiling of the leakage oil with small particles is adequately filtered and high system purity is ensured.
  • the invention also opens up the possibility of using the discharge device 10 in such a way that the housing can be completely drained of axial piston machines and / or splashing losses can be reduced to a very low level.

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)
  • Fluid-Pressure Circuits (AREA)

Abstract

L'invention concerne un système hydraulique comprenant au moins un ensemble déplaceur hydrostatique (2, 4), un dispositif de filtration (6) servant à filtrer l'huile hydraulique qui circule dans chaque ensemble déplaceur (2, 4), et un dispositif d'évacuation (10) qui filtre l'huile de fuite générée en fonctionnement au niveau de chaque ensemble déplaceur (2, 4) et l'amène dans une cuve (8). Ce système est caractérisé en ce que le dispositif d'évacuation (10) comporte un dispositif de pompage (26) au moyen duquel l'huile de fuite peut être amenée à un niveau de pression approprié pour l'alimenter dans le système de filtration (6).
EP13783847.0A 2012-10-26 2013-10-25 Système hydraulique comprenant au moins un ensemble déplaceur hydrostatique Withdrawn EP2912323A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012021843.5A DE102012021843A1 (de) 2012-10-26 2012-10-26 Hydrauliksystem mit zumindest einer hydrostatischen Verdrängereinheit
PCT/EP2013/003215 WO2014063826A1 (fr) 2012-10-26 2013-10-25 Système hydraulique comprenant au moins un ensemble déplaceur hydrostatique

Publications (1)

Publication Number Publication Date
EP2912323A1 true EP2912323A1 (fr) 2015-09-02

Family

ID=49513894

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13783847.0A Withdrawn EP2912323A1 (fr) 2012-10-26 2013-10-25 Système hydraulique comprenant au moins un ensemble déplaceur hydrostatique

Country Status (3)

Country Link
EP (1) EP2912323A1 (fr)
DE (1) DE102012021843A1 (fr)
WO (1) WO2014063826A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107575426B (zh) * 2017-09-21 2023-09-15 中国三冶集团有限公司 氧气混合天然气动力管网用大口径弯管机液压系统
CN110043460A (zh) * 2019-03-25 2019-07-23 湖南工业大学 一种机油泵性能优化装置
CN115388066B (zh) * 2022-09-23 2023-04-18 无锡职业技术学院 一种液压系统清洁度在线检测系统和方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3529421A (en) * 1968-11-18 1970-09-22 White & Co Inc K M Jet-pump oil-return system
DE3341104A1 (de) * 1983-11-12 1985-05-23 Turmag Turbo-Maschinen-AG Nüsse & Gräfer, 4322 Sprockhövel Anordnung zum abfuehren des leckstromes bei hydraulikeinrichtungen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4128615C1 (fr) * 1991-08-28 1993-01-14 Hydromatik Gmbh, 7915 Elchingen, De
DE4203062C1 (en) * 1992-02-04 1993-07-01 Hemscheidt Maschinentechnik Schwerin Gmbh & Co, O-2781 Schwerin, De Hydraulic installation with main and sec. flow circuit and sec. flow filtration - comprises liq. tank with partition for limited screening of liq.flow into and out of tank.
DE102009032572A1 (de) * 2009-07-10 2011-01-13 Hydac Filtertechnik Gmbh Filtereinrichtung
CN103403361B (zh) * 2010-12-29 2015-11-25 伊顿公司 用于冷却变速电动马达-泵的壳体流量增大装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3529421A (en) * 1968-11-18 1970-09-22 White & Co Inc K M Jet-pump oil-return system
DE3341104A1 (de) * 1983-11-12 1985-05-23 Turmag Turbo-Maschinen-AG Nüsse & Gräfer, 4322 Sprockhövel Anordnung zum abfuehren des leckstromes bei hydraulikeinrichtungen

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of WO2014063826A1 *

Also Published As

Publication number Publication date
WO2014063826A1 (fr) 2014-05-01
DE102012021843A1 (de) 2014-04-30

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