EP3114355A1 - Ventilvorrichtung - Google Patents
VentilvorrichtungInfo
- Publication number
- EP3114355A1 EP3114355A1 EP15703877.9A EP15703877A EP3114355A1 EP 3114355 A1 EP3114355 A1 EP 3114355A1 EP 15703877 A EP15703877 A EP 15703877A EP 3114355 A1 EP3114355 A1 EP 3114355A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- valve
- pressure
- control
- fluid
- valve spool
- 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
Links
- 239000012530 fluid Substances 0.000 claims description 34
- 238000006073 displacement reaction Methods 0.000 claims description 14
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000011664 signaling Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 6
- 230000009471 action Effects 0.000 claims description 2
- 238000004146 energy storage Methods 0.000 claims description 2
- 230000009467 reduction Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000007704 transition Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/025—Pressure reducing 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/026—Pressure compensating 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
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
- F15B20/007—Overload
-
- 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
- F15B2211/50563—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure
- F15B2211/50572—Pressure control characterised by the type of pressure control means the pressure control means controlling a differential pressure using a pressure compensating valve for controlling the pressure difference across a flow control valve
Definitions
- the invention relates to a valve device for influencing a media flow between a supply connection, to which a pressure supply source can be connected, and a pressure connection, to which a hydraulic consumer can be connected, with a valve device which has a valve slide, which is guided longitudinally displaceable in a valve housing between end positions ,
- valve devices are freely available in the form of pressure compensators, flow control valves or pressure reducing valves on the market. These valves have the task to regulate a constant pressure difference, which is independent of an inlet pressure. If this pressure difference is additionally present via a metering orifice, the overall function is referred to as a volume flow regulator.
- a pressure compensator has a valve slide, which is displaceable in a housing.
- the pressure compensator regulates a volume flow between a supply connection and a pressure connection.
- the valve spool has for this purpose a control edge, which cooperates with the valve housing.
- On one control side of the valve slide the pressure present at the supply connection is copied, while the opposite control side is acted upon by the fluid pressure present at the pressure connection and, if appropriate, an energy store.
- the realization of a pressure compensator is possible even without a compression spring; this will be only a predetermined area ratio required, as it results, for example, when using a stepped piston.
- the valve spool moves here, as long as there is a pressure difference between the control sides.
- the invention is therefore based on the object to show a valve device that can not pass unhindered pressure fluctuations at the supply connection and thus provides protection for a connected hydraulic consumer.
- the valve device according to the invention is characterized in that by means of a control device of the adjusted by the valve spool pressure at the pressure port from a predetermined displacement of Valve spool is limited towards one of its end positions.
- the maximum pressure at the pressure port can be advantageously limited. Consequently, it can no longer come to overloads of the hydraulic consumer.
- the fluid pressure at the pressure connection has a constant pressure difference to the supply connection until a permissible maximum pressure is reached. Any "ghosting" of the valve spool are also avoided by this pressure-limiting valve device.
- a control line opens into the valve housing, which is part of a LS signal line, a tank connection or another, substantially ambient pressure having return connection.
- a fluid coming from the pressure connection flows from the predetermined displacement of the valve spool via this control line.
- the drainage of the fluid leads to a relief, which causes the valve slide in the direction of its
- the control device may have a control channel within the valve slide, which terminates on a control side of the valve slide in a media chamber within the valve housing and fluidly connects this media chamber with another media chamber within the valve housing to which the control line is connected from the predetermined displacement of the valve spool ,
- the media chambers may be pressure chambers, which act on the control sides of the valve spool with fluid pressure. If the valve slide is displaced out of its one end position, the closed position, by a predetermined displacement, a pressure equalization takes place between the media chambers. Alone due to this pressure equalization already occurs to a return movement of the valve piston and thus to a reduction or limitation of the fluid pressure at the pressure port.
- control channel in the valve spool in the direction of the further media chamber with the control line of a longitudinal channel which is parallel to the direction of the valve spool, in a transverse channel, which remains covered by the valve body until the fluid-carrying connection between the one media chamber and the other media chamber is made.
- a control edge may be formed in the valve housing, which cooperates with the transverse channel. Only when the transverse channel passes over the control edge, there is a fluid-carrying connection between the media chambers.
- a simple, easy to manufacture and space-saving way is shown to produce a fluid-conducting connection between the media chambers in response to the displacement of the valve spool.
- control channel can open a pressure signaling channel, which passes the regulated by the valve spool pressure between theansehl uss and the pressure port in the control channel.
- pressure detection channel and the control channel can thus be easily copied to the pending on the supply port fluid pressure on the one control side of the valve spool, without having to provide additional holes in the valve housing.
- fluid can flow away from the supply connection in the direction of the control line.
- the pressure signaling channel advantageously opens into a valve chamber of the valve housing, which is delimited laterally by two control parts of the valve slide.
- the control parts advantageously regulate the fluid flow to the supply connection and the pressure connection.
- the control channel advantageously has a diaphragm or a throttle point, which is provided between the supply connection and the control valve of the valve slide adjacent to the one media chamber.
- the control behavior of the valve device can be advantageously influenced, in particular delayed, with the diaphragm or the throttle point. In this way, for example, pressure surges on the supply connection can no longer be imaged directly on the one control side of the valve slide, so that a sudden control of the valve device is prevented, which could lead to damage to the hydraulic consumer.
- a device In a fluid-carrying line between the pressure port and the hydraulic consumer, a device may be provided and the LS signal line may open into the fluid-carrying connection between the device and the hydraulic consumer.
- This has the advantage that a low pressure is present in the further media chamber, to which the control line is connected. In this way, the fluid can flow more easily from the further control chamber via the control line when the valve spool is displaced beyond the predetermined displacement.
- the valve device is preferably an individual pressure balance and the device is a metering orifice.
- a volumetric flow controller is advantageously formed.
- valve slide can disconnect the pressure connection from the supply connection in at least one of the end positions.
- Fig. 1 is a hydraulic symbol representation of a volume flow controller
- Fig. 3 is a hydraulic symbol representation of an inventive
- Fig. 4 is a longitudinal section through the valve device according to the invention.
- FIGS. 1 and 2 show in the form of a hydraulic symbol representation and in the form of a longitudinal section a pressure compensator 10 in conjunction with a metering orifice 12, which form a volume flow regulator 14 in the overall function.
- This volume flow controller 14 forms the starting point of the description for the valve device 16 according to the invention explained below with reference to FIGS. 3 and 4.
- a valve housing 18 has a valve bore 20 in which a longitudinally movable guided valve slide 22 is arranged.
- the valve bore 20 is closed at both ends 24, 26 by end screws 28, 30, which engage in a respective assignable internal thread 32 of the valve bore 20.
- each annular sealing elements 34 are provided between the end screws 28, 30, and the valve housing 18 .
- the valve spool 22 is for controlling a fluid-carrying connection 36 between at least two fluid connection points 38, 40 accommodated in the valve housing 18, a supply connection 38 and a
- a pressure supply source P can be connected to the supply connection 38, and a hydraulic consumer U can be connected to the pressure connection 40.
- the valve spool 22 has a total of two control parts 42, 44, of which the first control part 42nd has at least one pocket-like recess 46 and the second control part 44 is arranged by a first fluid guide 48 from the first control part 42 spaced. In principle, it is possible to implement the solution according to the invention only with a control part, for example the control part 42.
- the second control part 44 In the unactuated state of the valve spool 22, ie at zero stroke, in which the valve spool 22 is in the left end position in the image plane, the second control part 44 by means of a cylindrical guide member 50 in abutment with a housing inner wall 52 of the valve housing 18.
- a conically extending transition part 54 forms a flow guide for the fluid flowing through the fluid guide 48 and causes a deflection of the fluid flow in the direction of the pressure port 40.
- the transition part 54 also contributes to the flow force compensation at the valve spool at.
- a further guide part 56 of the valve spool 22 is guided in the region of the pressure port 40 in the valve housing 18 through the inner wall 52.
- a first fluid guide 48 which holds this at a distance, is already arranged.
- a second fluid guide 58 between the second control part 44 and the further guide part 56 now improves the flow around the valve slide 22 in the region of the second control part 44, as a result of which the pressure losses within the pressure balance 10 are reduced.
- the sealing behavior of the second control part 44 with respect to the housing inner wall 52 is improved by the second fluid guide 58, since the sealing gap between valve spool 22 and housing inner wall 52 can be reduced by the introduction of the second fluid guide 58 in the valve spool 22.
- the two fluid guides 48, 58 which form axial distances between the first control part 42 and the second control part 44 and between the second control part 44 and the further guide part 56, are groove-like diameter reductions 59 formed in the valve spool 22. Such diameter reductions 59 are also referred to as punctures in technical terms.
- left end face 60 of the valve spool 22 adjoins a medium chamber 62 of variable volume into which a control channel 64 of the valve spool 22 opens with its one end 66, the other end 68 via two extending in the transverse direction
- the valve chamber 72 is bordered by the two control parts 42, 44 of the valve spool 22 and the valve housing 18 with limited.
- the regulated by the valve spool 22 pressure between the supply port 38 and the pressure port 40 is forwarded via the Druckmeldekanäle 70 and the control channel 64 in the one medium chamber 62.
- the prevailing in the one medium chamber 62 fluid pressure then acts on the valve spool 22 in the direction of an open position.
- the hydraulic consumer U is connected via a fluid-carrying line 73.
- the device 12 in particular designed in the manner of a metering orifice, is provided.
- a corresponding control line 76 in the form of a LS signal line 78 is provided, which is connected to the valve housing 18 and to another Media chamber 80 leads.
- the valve spool 22 is acted upon on its other end face 74 also by an energy storage 82 in the form of a compression spring.
- guides 84, 86 are formed for the compression spring 82.
- the valve device 16 of FIGS. 3 and 4 represents a further development and differs from the volumetric flow regulator 14 of FIGS. 1 and 2 essentially in that in a valve device 88 in the form of an individual pressure balance by means of a control device 90 the pressure regulated by the valve spool 22 is between the Supply connection 38 and the pressure port 40 from a predetermined displacement V of the valve spool 22 in the direction of one of its end positions, in this case the right in the image plane end position, can be limited.
- control device 90 has an extended control channel 64 within the valve spool 22, which opens on the one control side 60 of the valve spool 22 into the one media chamber 62 within the valve housing 18.
- the control channel 64 connects the one media chamber 62 with the further media chamber 80 within the valve housing 18, to which the control line 76 is connected, from the predetermined displacement V of the valve spool 22 fluid leading.
- the control channel 64 proceeds in the direction of the further media chamber 80 with the control line 76 from a longitudinal channel 94, which runs parallel to the direction of movement VR of the valve slide 22, into a transverse channel 96.
- the transverse channel 96 remains covered by the valve housing 18 until the fluid-conducting connection 98 between the one medium chamber 62 and the other medium chamber 80 is made.
- an inner circumferential groove 100 is provided for this purpose, which has a control edge 102. Through the inner circumferential groove 100, the fluid can flow around the further guide part 56 at the end. It is further provided that the fluid via the control line 76 in the direction of the LS signal line 78, a tank port 104 or other, substantially ambient pressure having return port from the further media chamber 80 can flow. To determine the flow direction of the fluid and the amount of fluid To be able to control 0 .den fluid, the LS signal line 78 and the tank port 104 adjustable throttle bodies 106, 108 on.
- the control channel 64 in the valve spool 22 has a further throttle point 1 10, which is provided between the supply Anzusungsa Vietnamesesanhl 38 and the adjacent to a media chamber 62 control side 60 of the valve spool 22.
- This throttle point 1 10 is very simply formed by the fact that the pressure signaling channels 70 have a correspondingly small inner diameter. Through this throttle point 1 10 pressure fluctuations at the notedsgessehl USS 38 delayed forwarded to the first media chamber 62.
- valve device 16 The operation of the valve device 16 will be explained below.
- a fluid pressure applied to the supply port 38 is forwarded to the one fluid chamber 62 via the pressure detection ports 70 and the control port 64. There, it acts on the adjacent control side 60 of the Venzilschiebers 22 a. On the opposite control side 74 of the valve spool 22 from the load pressure via the LS signal line 78 and the compression spring 82 is acted upon. When the fluid pressure at the supply section 38 exceeds the counterpressure by the load pressure and the compression spring 82, the valve spool 22 moves to the right starting from the closed position SS at zero stroke in the image plane.
- the second control part 44 is brought out of engagement with the housing inner wall 52 so that a flexible connection 36 between the supply connection 38 and the pressure connection 40 is increasingly opened.
- the fluid-conducting connection 48 is interrupted by closing the control part 42 at the control edge 51 and the fluid-conducting connection 36 between the media chambers 62, 80 produced because the transverse channel 96 of the control device 90 has overflowed the control edge 102 in the valve housing 18.
- this fluid-carrying connection 98 between the media chambers 62, 80 there is a pressure equalization between the media chambers 62, 80th
- valve spool 22 Due to the compression spring 82, therefore, the valve spool 22 is again moved to the left in the direction of the closed position SS, as long as the
- the fluid pressure at the pressure port 40 has a constant pressure difference with the supply port 38 until the permissible maximum pressure is reached.
- a valve device 16 is shown, the pressure fluctuations at the supply terminal 38 advantageously no longer pass unhindered and thus effectively prevents any damage to the hydraulic load U.
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)
- Safety Valves (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102014003086.5A DE102014003086A1 (de) | 2014-03-01 | 2014-03-01 | Ventilvorrichtung |
PCT/EP2015/000253 WO2015131973A1 (de) | 2014-03-01 | 2015-02-07 | Ventilvorrichtung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3114355A1 true EP3114355A1 (de) | 2017-01-11 |
EP3114355B1 EP3114355B1 (de) | 2021-01-06 |
Family
ID=52468967
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15703877.9A Active EP3114355B1 (de) | 2014-03-01 | 2015-02-07 | Ventilvorrichtung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP3114355B1 (de) |
CN (1) | CN206071985U (de) |
DE (1) | DE102014003086A1 (de) |
WO (1) | WO2015131973A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102016007754A1 (de) | 2016-06-24 | 2018-01-11 | Hydac System Gmbh | Ventilvorrichtung zum Beeinflussen eines Medienstromes |
CN111255761B (zh) * | 2020-01-19 | 2022-04-05 | 宁波宇洲液压设备有限公司 | 液控换向减压阀 |
CN112555214B (zh) * | 2020-12-10 | 2021-07-23 | 山东泰丰智能控制股份有限公司 | 一种三端口二通定压差阀 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3531758B2 (ja) * | 1994-06-27 | 2004-05-31 | 株式会社小松製作所 | 圧力補償弁を備えた方向制御弁装置 |
DE102008026926A1 (de) * | 2008-06-05 | 2009-12-17 | Hydac Electronic Gmbh | Stromteilervorrichtung und Versorgungseinrichtung unter Einsatz einer dahingehenden Stromteilervorrichtung |
DE102008042624A1 (de) * | 2008-10-06 | 2010-04-08 | Robert Bosch Gmbh | Schieberventil zur hydraulischen Steuerung in einem Kraftfahrzeug-Automatikgetriebe |
CA2793440C (en) * | 2010-03-17 | 2018-02-06 | Parker Hannifin Corporation | Hydraulic valve with pressure limiter |
WO2013090458A1 (en) * | 2011-12-12 | 2013-06-20 | Parker-Hannifin Corporation | Pressure reducing valve with pressure relief |
DE102012014359A1 (de) * | 2012-07-19 | 2014-01-23 | Hydac Filtertechnik Gmbh | Ventilvorrichtung und Ventilanordnung bestehend aus dahingehenden Ventilvorrichtungen |
-
2014
- 2014-03-01 DE DE102014003086.5A patent/DE102014003086A1/de not_active Withdrawn
-
2015
- 2015-02-07 WO PCT/EP2015/000253 patent/WO2015131973A1/de active Application Filing
- 2015-02-07 EP EP15703877.9A patent/EP3114355B1/de active Active
- 2015-02-07 CN CN201590000329.6U patent/CN206071985U/zh active Active
Also Published As
Publication number | Publication date |
---|---|
DE102014003086A1 (de) | 2015-09-03 |
WO2015131973A1 (de) | 2015-09-11 |
CN206071985U (zh) | 2017-04-05 |
EP3114355B1 (de) | 2021-01-06 |
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