EP0205753B1 - Ventil - Google Patents

Ventil Download PDF

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Publication number
EP0205753B1
EP0205753B1 EP86102774A EP86102774A EP0205753B1 EP 0205753 B1 EP0205753 B1 EP 0205753B1 EP 86102774 A EP86102774 A EP 86102774A EP 86102774 A EP86102774 A EP 86102774A EP 0205753 B1 EP0205753 B1 EP 0205753B1
Authority
EP
European Patent Office
Prior art keywords
valve
control
control spool
seal
channel
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.)
Expired
Application number
EP86102774A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0205753A1 (de
Inventor
Manfred Dipl.-Ing. Becker
Hilmar Dipl.-Ing. Ortlepp
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.)
Deere and Co
Original Assignee
Deere and Co
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 Deere and Co filed Critical Deere and Co
Priority to AT86102774T priority Critical patent/ATE41216T1/de
Publication of EP0205753A1 publication Critical patent/EP0205753A1/de
Application granted granted Critical
Publication of EP0205753B1 publication Critical patent/EP0205753B1/de
Expired 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
    • 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
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/86493—Multi-way valve unit
    • Y10T137/86574—Supply and exhaust
    • Y10T137/8667—Reciprocating valve
    • Y10T137/86694—Piston valve
    • Y10T137/8671—With annular passage [e.g., spool]
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87169—Supply and exhaust
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/877—With flow control means for branched passages
    • Y10T137/87708—With common valve operator
    • Y10T137/87732—With gearing

Definitions

  • the invention relates to a valve with a control slide, a valve bore and at least one seal, the seal being provided between the control slide and the valve bore and the control slide being displaceable in the valve bore by means of an actuating device.
  • the invention has for its object to develop the valve so that when actuating the actuating device, the frictional forces resulting from the seal are reduced with as little effort and simple means as possible.
  • the seal can be brought into a sealing and a non-sealing position by means of a pressure medium, that a ballast valve is provided between the control slide and the actuating device and that the pressure medium flow to or from the seal is dependent from the relative position of the ballast valve relative to the spool.
  • the actuation of the actuating device first has an effect on the ballast valve and first carries out a pressure reduction behind the seal, so that the control slide can then be displaced without major friction after that, only after further actuation of the actuating device.
  • the cross-section of the control process is larger than the cross-section of the inlet, it results from the fact that the pressure behind the seal decreases faster than it builds up.
  • the advantage of this is that the spool can be quickly moved from its position, for example the neutral position, in which the seal acts as such, to another position and does not have to be waited for a long time until the seal has withdrawn from the sealing surface .
  • a simple and safe supply and discharge of the pressure medium in and out of the channel depending on both the position of the control slide and the ballast valve is achieved in that the ballast valve is axially displaceable between two end positions, the control sequence of the ballast valve is opened when it is in one of its end positions, and in the case of a valve in which the control slide can assume a neutral position, the channel is designed as an axial bore in the control slide and the inflow from an inflow line connected to a pressure source and there is an inlet channel opening into the channel, the inlet channel being aligned with the inlet line in the neutral position of the control slide.
  • seal is designed as an inflatable body seal, is arranged on the circumference of the control slide and is connected to the channel via the seal outlet.
  • the ball valve leads to a collecting container and has in the one end position aligned with the control sequence opening.
  • control slide and the ballast valve always assume the same position with respect to one another when the actuating device has been brought into a neutral position achieved in that the second centering device also acts on the ballast valve and the ballast valve is between its two end positions when the actuating device has assumed its neutral position.
  • the feed rate of the pressure medium to the seal is regulated according to a further proposal of the invention in that an orifice is provided in the feed line.
  • the functional reliability of the valve is ensured, inter alia, according to the invention in that the end positions of the series valve are determined via a stop on the control slide, the one stop being formed by a spreading disc which is placed on the end of the control slide and is spreadable from outside the control slide , and that the ball valve concentrically encloses the spool over part of its length.
  • a hydraulic circuit 10 as can be seen from FIG. 1, consists of a collecting container 12, in which liquid such as hydraulic oil is stored, a pump 14 variable in its delivery volume as a pressure source, a valve 16, a consumer 18 which can be acted upon from both sides, a first one and a second line 20, 22 between the valve 16 and the consumer 18, a first and a second line 24 and 26 between the valve 16 and the collecting container 12, a line 28 between the collecting container 12 and the pump 14 and a line 30 between the pump 14 and the valve 16.
  • the valve 16 can essentially be divided into five main components, namely two almost identical valve bodies 32, 34, two identical first centering devices 36, 38, which are connected at one end to the valve bodies 32, 34, and an adjusting body 40, the other end to the two Valve body 32, 34 is flanged.
  • Each valve body 32, 34 has a valve or longitudinal bore 42 which is cut by a return flow channel 44, an outflow channel 46 and an inflow channel 48. Furthermore, an inlet line 50, which is much smaller in diameter and which is connected to the inflow channel 48 and provided with an orifice 52, opens into the longitudinal bore 42 an annular groove 54, 56, 58 is provided, the annular groove 54, which is connected to the return flow channel 44, extending to the adjusting body 40. In the area adjacent to the adjusting body 40, the longitudinal bore 42 is provided with an extension 60, in which a sealing ring 62 is received.
  • valve bodies 32, 34 In the end region of the valve bodies 32, 34 which is located towards the centering device 36, 38, a recess 64 which widens the longitudinal bore 42 and is used to accommodate the centering device 36, 38.
  • the difference between the two valve bodies 32, 34 is that the inflow channel 48 and the backflow channel 44 of the valve body 34 arranged at the bottom in the drawing and facing the pump 14 and the collecting container 12 are designed as a through hole and not as a blind hole as in the valve body 32 arranged above are.
  • Each centering device 36, 38 consists of a sleeve 66 with a cylindrical extension 68 which is screwed into the recess 64 of the valve body 32, 34 assigned to it, a disc 72 inserted between the cylindrical extension 68 and an inner end wall 70 of the recess 64 with a Opening 74, a helical compression spring 76, a further washer 78 with an opening 80 and an annular seal 82 which is pressed between an outer end wall 84 of the valve body 32, 34 and the end wall 86 of the sleeve 66 which is assigned to it.
  • a stepped bore 88 extending within the sleeve 66 forms a stop 90, against which the further disk 78 can be brought into contact, and opens into the first line 24 leading to the collecting container 12 via a bore 92 of reduced diameter.
  • the adjusting body 40 contains two blind bores 94 which are aligned with the longitudinal bores 42 of the valve bodies 32, 34 and which are pierced on their sides facing each other by approximately half their length by a slot 96 for the passage of part of a toothed pinion 98.
  • the toothed pinion 98 has a notch 100 on its circumference, into which a locking ball 102 can snap under the pressure of a spring 104 and which can optionally be fixed via an adjusting screw 106 and the locking ball 102.
  • the pinion 98 is rotatably connected to a lever 108, by means of which it can be rotated as long as the set screw 106 does not place the locking ball 102 on the block.
  • the entire adjustment body 40 is clamped to the valve bodies 32, 34 by means of screws, not shown in the drawing, and is sealed off from them in a conventional manner.
  • the pinion 98 forms an actuating device together with the lever 108, and the notch 100, the locking ball 102 and the spring 104 function together as a second centering device.
  • a three-part slide 110 consisting of a control slide 112, a connecting element 114 acting as a series valve, and a toothed rack 116 extends.
  • the control slide 112 is on its periphery from the centering device 36, 38 starting with an inflow ring groove 118, an inflow ring groove 120, two trapezoidal grooves 122, a return flow ring groove 124, an outlet ring groove 126 and a holding groove 128.
  • the inlet ring groove 118 is slightly wider than the inlet opening of the inlet line 50 into the longitudinal bore 42
  • the inflow ring groove 120 is somewhat wider than the inlet opening of the inlet channel 48 into the longitudinal bore 42
  • the return ring groove 124 goes into a valve shoulder 130 of an even smaller outside diameter, which at the same time forms the end region of the control slide 112, via.
  • a stop 131 is thus formed on the circumference of the control slide 112 at the beginning of the valve shoulder 130.
  • the two trapezoidal grooves 122 are screwed symmetrically into a ring shoulder 132 between the inflow ring groove 120 and the return flow ring groove 124 and are provided with shape-changing seals in the form of inflatable body seals 134.
  • the design and function of these inflatable body seals 134 are described in detail in EP-A 0 139 150, the disclosure of which is incorporated in this description.
  • the drain ring groove 126 and the holding groove 128 are incorporated in the valve shoulder 130.
  • Extending axially in the control slide 112 from the end facing the centering device 36, 38 into the region of the drain ring groove 126 is an inner bore 136 forming a channel, which is designed as a blind bore and extends radially through one Directed inlet channel 138 with the inlet ring groove 118, is connected to the outlet ring 126 via radially oriented bores 140 forming a sealing outlet with the trapezoidal grooves 122 and via a likewise radially oriented outlet channel 142 to be regarded as a control outlet.
  • the inlet line 50 and the inlet channel 138 together form the inlet itself.
  • the inner bore 136 is closed by a screw plug 144 with a wide head 146.
  • the control slide 112 has a taper 148, the outer diameter of which almost matches the width of the openings 74, 80 of the disks 72, 78 in the centering device 36, 38.
  • the taper 148 is concentrically surrounded by the helical compression spring 76 and the two disks 72, 78, wherein in a central or neutral position of the control slide 112, the one disk 72 comes to rest on a shoulder 150 between the taper 148 and the following part of the control slide 112 and the further disk 78 bears against a support disk 152 clamped between the head 146 of the screw-in plug 144 and the end face of the control slide 112.
  • the helical compression spring 76 is inserted between the two disks 72, 78 and is prestressed.
  • the inlet line 50 opens into the inlet ring groove 118, the inflow channel 48 into the inflow ring groove 120, the return flow channel 44 into the return flow ring groove 124, and the trapezoidal grooves 122 with the inflatable body seals 134 receive the annular groove 56 between them.
  • the connecting member 114 is provided at its end region facing the control slide 112 with a stepped bore 154, which takes up almost a third of its total length, and at its end region facing the rack 116 with a flattening 156 having a bore not shown in the drawing.
  • the connecting member 114 is also round and has an outer diameter which is approximately as large as the inner diameter of the longitudinal bore 42. At the transition from the valve bodies 32, 34 to the adjusting body 40, it is surrounded in a sealing manner by the sealing ring 62.
  • the stepped bore 154 has an area of smaller inner diameter 158 at the end facing control spool 112 and further inside an area of larger inner diameter 160, between which a step 162 is formed.
  • the area of smaller inner diameter 158 merges via an opening 164 and the area of larger inner diameter 160 via an insertion bore 166 into the return flow ring groove 124.
  • the toothed rack 116 essentially has the shape of an H, a left side web 168 according to FIG. 1 being fork-shaped for pivotally receiving the connecting member 114 with a connecting pin 170. Like a right side web 172, it is round and slidably comes into contact with the blind hole 94.
  • a transverse web 174 is provided on the side facing the pinion 98 with a flat toothing 176 which is in engagement with the pinion 98.
  • a securing wire 178 is provided, which is inserted into the holding groove 128 and serves to connect the control slide 112 to the connecting member 114.
  • the valve shoulder 130 of the control slide 112 is pushed into the stepped bore 154 in the connecting member 114 until the retaining groove 128 is aligned with the insertion bore 166.
  • the securing wire 178 can then be inserted through the insertion bore 166 and inserted into the holding groove 128.
  • an axial connection of the control slide 112 with the connecting member 114 can also take place via a spreading washer 180 and a conical head screw 182 with an internal hexagon 186 arranged in its shaft 184.
  • the spreading disc 180 as well as the locking wire 178 thus act as a stop.
  • the spreading disc 180 is first fastened with the cap screw 182 on the right-hand end of the control slide 112 in the drawing, for which purpose the end of the inner bore 136 facing the connecting member 114 opens towards the end of the control slide 112 and is provided with an internal thread is, in which the head screw 182 can be screwed.
  • valve extension 130 is then inserted into the stepped bore 154 and the cap screw 182 is tightened using a long wrench with a correspondingly large external hexagon, which is inserted through the internal bore 136 from the other end, until the expansion disk 180 has spread to an external diameter that is larger than the inside diameter of the stepped bore 154 in the region of the smaller inside diameter 158.
  • the inflatable body seals 134 should be pressurized when the control slide 112 is in the neutral position and neither liquid can flow back nor out of the consumer 18.
  • the consumer 18 should be placed entirely on a block.
  • the pressure in the inflatable body seals 134 should be completely reduced when the control slide 112 is adjusted via the lever 108, so that the inflatable body seals 134 can retract into the trapezoidal grooves 122 to below the outer surface of the control slide 112.
  • the valve 16 is to be adjusted such that hydraulic fluid is supplied to the right end of the consumer 18 with reference to FIG. 1 and is discharged from the left end thereof.
  • the lever 108 is pivoted clockwise with a view of the drawing and, via the pinion 98, takes the toothed rack 116 and the connecting member 114 of the two sliders 110 in the opposite direction. That in the drawing Upper link 114 moves to the right until the step 162 of the step bore 154 comes to rest on the safety wire 178. Shortly before that, the connecting member 114 slides with its end face over the outlet channel 142 and releases the pressure medium flow from the inner bore 136 through the opening 164 into the return flow ring groove 124, so that the pressure behind the inflatable body seals 134 can be reduced and these can contract. After these have pulled together and withdrawn behind the surface of the control slide 112, the control slide 112 is largely free of frictional forces with respect to the longitudinal bore 42.
  • the lower connecting link 114 moves towards the control slide 112 and comes with its end face to the stop 131 between the valve shoulder 130 and the return flow ring groove 124.
  • the opening 164 is aligned with the outlet channel 142, and the hydraulic fluid stowed in the inner bore 136 and behind the inflatable body seals 134 can flow out into the return flow ring groove 124.
  • This lower control slide 112 is thus also free of frictional forces and can be moved axially in the longitudinal bore 42.
  • the pump 14 then conveys pressure fluid through the inflow channel 48, the annular groove 58, the inflow annular groove 120 of the upper control slide 112, the outflow channel 46 and the line 20 to one end of the consumer 18, while liquid at the other end of the consumer 18 via the line 22 emerges and flows via the annular groove 56 of the lower valve body 34, the return flow annular groove 124, the return flow channel 44 and the line 26 to the collecting container 12.
  • Pressure fluid entering the supply line 50 from the inflow channel 48 cannot enter the control slide valve 112 into the supply ring groove 118, since the supply line 50 no longer aligns with the supply ring grooves 118 due to the displacement of the upper and lower control slide valve 112.
  • the lever 108 is pivoted again in the counterclockwise direction, whereby the connecting members 114 and the toothed racks 116 of the two sliders 110 are moved back in the direction of the original position, that is to say the neutral position.
  • the action of the helical compression springs 76 located in the centering devices 36, 38 keeps the control slides 112 in firm contact with the connecting members 114, so that they maintain the same spatial relationship that they assumed during the displacement of the control slides 112 had.
  • the locking ball 102 ensures that the pinion 98 and with it the racks 116 and the links 114 assume their precisely defined starting position.
  • the outlet channels 142 are closed again by the connecting members 114 in the region of smaller inner diameter 158, and pressure can build up behind the inflatable body seals 134.
  • the valve 16 is then again in its initial state.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Multiple-Way Valves (AREA)
  • Sliding Valves (AREA)
  • Magnetically Actuated Valves (AREA)
  • Electrically Driven Valve-Operating Means (AREA)
  • Temperature-Responsive Valves (AREA)
  • Valve-Gear Or Valve Arrangements (AREA)
EP86102774A 1985-03-06 1986-03-03 Ventil Expired EP0205753B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86102774T ATE41216T1 (de) 1985-03-06 1986-03-03 Ventil.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3507866 1985-03-06
DE19853507866 DE3507866A1 (de) 1985-03-06 1985-03-06 Ventil

Publications (2)

Publication Number Publication Date
EP0205753A1 EP0205753A1 (de) 1986-12-30
EP0205753B1 true EP0205753B1 (de) 1989-03-08

Family

ID=6264324

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86102774A Expired EP0205753B1 (de) 1985-03-06 1986-03-03 Ventil

Country Status (6)

Country Link
US (1) US4664356A (xx)
EP (1) EP0205753B1 (xx)
AT (1) ATE41216T1 (xx)
DE (2) DE3507866A1 (xx)
ES (1) ES8705950A1 (xx)
ZA (1) ZA861642B (xx)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2220048A (en) * 1988-06-24 1989-12-28 Lasalle Manufacturing Limited A valve assembly
KR100330005B1 (ko) * 1998-04-13 2002-05-09 윤종용 스텝 모터를 이용한 유량 조절 밸브
KR100330004B1 (ko) * 1998-04-13 2002-05-09 윤종용 디씨 모터를 이용한 유량 조절 밸브
KR101788872B1 (ko) 2008-06-02 2017-10-20 이턴 코포레이션 밸브 매니폴드
CN104976174B (zh) * 2015-07-01 2017-01-25 靖江市菲尔特液压机械有限公司 螺纹插装式先导手动比例节流换向阀
CN109404561A (zh) * 2018-09-30 2019-03-01 陕西科技大学 一种磨煤分配阀
CN113217491A (zh) * 2021-04-15 2021-08-06 浙大城市学院 一种电液比例阀

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2675024A (en) * 1950-01-07 1954-04-13 United Aircraft Prod Valve with expanding ring seal
US3056573A (en) * 1956-07-12 1962-10-02 Rockwell Mfg Co Fluid pressure actuated valve
US3605810A (en) * 1968-11-18 1971-09-20 Metric Inc Flow diverter valve
DE2013689A1 (de) * 1970-03-21 1971-10-14 Buerkert C Wegeventil
DE3264382D1 (en) * 1982-03-16 1985-08-01 Deere & Co Additional control apparatus for a closed hydraulic system
DE3332363A1 (de) * 1983-09-08 1985-03-28 Deere & Co., Moline, Ill., US, Niederlassung Deere & Co. European Office, 6800 Mannheim Schieberventil

Also Published As

Publication number Publication date
US4664356A (en) 1987-05-12
ATE41216T1 (de) 1989-03-15
ES552670A0 (es) 1987-05-16
EP0205753A1 (de) 1986-12-30
DE3507866C2 (xx) 1990-01-11
ES8705950A1 (es) 1987-05-16
DE3662306D1 (en) 1989-04-13
ZA861642B (en) 1987-11-25
DE3507866A1 (de) 1986-09-11

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