GB889893A - Improvements in or relating to hydraulic systems - Google Patents
Improvements in or relating to hydraulic systemsInfo
- Publication number
- GB889893A GB889893A GB3032260A GB3032260A GB889893A GB 889893 A GB889893 A GB 889893A GB 3032260 A GB3032260 A GB 3032260A GB 3032260 A GB3032260 A GB 3032260A GB 889893 A GB889893 A GB 889893A
- Authority
- GB
- United Kingdom
- Prior art keywords
- spool
- ram
- valve
- plunger
- spring
- 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
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2203—Arrangements for controlling the attitude of actuators, e.g. speed, floating function
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
- E02F3/28—Dredgers; Soil-shifting machines mechanically-driven with digging tools mounted on a dipper- or bucket-arm, i.e. there is either one arm or a pair of arms, e.g. dippers, buckets
- E02F3/36—Component parts
- E02F3/42—Drives for dippers, buckets, dipper-arms or bucket-arms
- E02F3/43—Control of dipper or bucket position; Control of sequence of drive operations
- E02F3/435—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like
- E02F3/437—Control of dipper or bucket position; Control of sequence of drive operations for dipper-arms, backhoes or the like providing automatic sequences of movements, e.g. linear excavation, keeping dipper angle constant
-
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- 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
- F15B2211/30—Directional control
- F15B2211/305—Directional control characterised by the type of valves
- F15B2211/30525—Directional control valves, e.g. 4/3-directional control 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
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/321—Directional control characterised by the type of actuation mechanically
- F15B2211/324—Directional control characterised by the type of actuation mechanically manually, e.g. by using a lever or pedal
-
- 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
- F15B2211/30—Directional control
- F15B2211/32—Directional control characterised by the type of actuation
- F15B2211/329—Directional control characterised by the type of actuation actuated by fluid pressure
-
- 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
- F15B2211/40515—Flow control characterised by the type of flow control means or valve with variable throttles or orifices
-
- 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
- F15B2211/41527—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a directional control 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
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/421—Flow control characterised by the type of actuation mechanically
- F15B2211/424—Flow control characterised by the type of actuation mechanically actuated by an output member of the circuit
-
- 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
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/755—Control of acceleration or deceleration of the output member
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/765—Control of position or angle of the output member
- F15B2211/7653—Control of position or angle of the output member at distinct positions, e.g. at the end position
-
- 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
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/85—Control during special operating conditions
- F15B2211/853—Control during special operating conditions during stopping
Abstract
889,893. Hydraulic apparatus; valves. INTERNATIONAL HARVESTER CO. Sept. 2, 1960, No. 30322/60. Classes 69 (2) and 135. An hydraulic system for the earth-working implement on a tractor comprises a valve 14 which is operable to control the flow of fluid to and from a ram 10 and embodies automatically-operative means for returning the valve from a ram-operative position to a neutral position in response to a predetermined increase in pressure resulting from a restriction in the hydraulic circuit, a restrictor valve 12 which is between the control valve and the ram and has a plunger 65 displaceable to restrict the flow of pressure fluid therethrough for moving the control valve to the neutral position, and adjustable means 84 operable by a moving element of the ram to displace the plunger to the flow-restricting position when the movable element reaches a predetermined position in its travel corresponding to the setting of the adjustable means. The ram, which is connected to the earth-moving implement on the tractor, has a piston 24 in a cylinder 21, the ends of which are joined by conduits 11, 13, 15 to the control valve 14 which, in turn, is connected by conduits 16, 18 to a pump 19 and reservoir 17. The restrictor valve 12 is interposed between the conduits 11, 15 and has a through bore 74, 75 controlled by an annular groove in the plunger which is urged by a spring 68 to a downward, unrestricting position and carries the adjustable stop 84. The plunger is formed with a slot 78 receiving a member 80 to which is secured an indicator 79 and which is connected by a flexible cable 87 in a sheath 89 to a rod 94 secured to the eye 26a of the rod of the piston 24. The control valve, which may be of the type described in Specification 688,023, and U.S.A. Specification 2,836,195, consists of a spool 35 urged to a central position by a spring 51 and movable in one direction or the other by a lever 28 to connect either line 13 or 15, connected to ports 31, 32 respectively, to a port 29 joined by the conduit 18 to the pump 19, the fluid passing through radial and axial passages 36, 37, 38 in the spool. The passage 37 is closed at its right-hand end by the spring-pressed spool 39 of a relief valve controlling a passage 59 leading to a port 30 connected to the conduit 16 and sump 17. The spool 39 carries a pin 40 abutting a sleeve 41 slidable on a tubular extension 35d of the spool 35 of the control valve. In the position shown, the sleeve 41 is axially spaced by a gap 46 from a sleeve 45 secured to the extension 35d by a pin 44, the gap receiving one or other of garter springs 47, 60 when the spool 35 is moved to one or other of its operative positions. In operation, when it is desired to lower the piston 24 and implement, the lever 28 is moved to displace the spool 35 of the control valve to the right to a position in which the pump 19 is connected to the conduit 15 and upper end of the cylinder 21, the garter spring 47 engaging the gap 46 to retain the spool in the selected position. The flow through the valve 12 to the ram is unrestricted until the member 80 attached to the eye 26a of the ram by the cable 87 abuts the stop 84, which has been adjusted to a position corresponding to the desired depth of operation of the implement, and moves the plunger 65 upwardly against the pressure of the spring 68, the movement of the plunger gradually restricting the flow and increasing the pressure in the conduits 15, 18 and passages 36, 37, 38 in the valve spool. The increase in pressure in the passage 37 displaces the spool 39 of the relief valve which, by means of the pin 40, moves the sleeve 41 to close the gap 46 so that the garter spring is no longer able to retain the spool in the selected position and the centring spring returns the spool to its neutral position to disconnect the pump from the ram.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3032260A GB889893A (en) | 1960-09-02 | 1960-09-02 | Improvements in or relating to hydraulic systems |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB3032260A GB889893A (en) | 1960-09-02 | 1960-09-02 | Improvements in or relating to hydraulic systems |
Publications (1)
Publication Number | Publication Date |
---|---|
GB889893A true GB889893A (en) | 1962-02-21 |
Family
ID=10305802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB3032260A Expired GB889893A (en) | 1960-09-02 | 1960-09-02 | Improvements in or relating to hydraulic systems |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB889893A (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2415029A (en) * | 2004-06-12 | 2005-12-14 | Demag Delaval Ind Turbomachine | A hydraulic restrictor |
CN101929173A (en) * | 2010-08-11 | 2010-12-29 | 许世东 | Repairer for broken loading roadway |
US8776511B2 (en) | 2011-06-28 | 2014-07-15 | Caterpillar Inc. | Energy recovery system having accumulator and variable relief |
US8850806B2 (en) | 2011-06-28 | 2014-10-07 | Caterpillar Inc. | Hydraulic control system having swing motor energy recovery |
US8919113B2 (en) | 2011-06-28 | 2014-12-30 | Caterpillar Inc. | Hydraulic control system having energy recovery kit |
US9068575B2 (en) | 2011-06-28 | 2015-06-30 | Caterpillar Inc. | Hydraulic control system having swing motor energy recovery |
US9086081B2 (en) | 2012-08-31 | 2015-07-21 | Caterpillar Inc. | Hydraulic control system having swing motor recovery |
US9091286B2 (en) | 2012-08-31 | 2015-07-28 | Caterpillar Inc. | Hydraulic control system having electronic flow limiting |
US9139982B2 (en) | 2011-06-28 | 2015-09-22 | Caterpillar Inc. | Hydraulic control system having swing energy recovery |
US9145660B2 (en) | 2012-08-31 | 2015-09-29 | Caterpillar Inc. | Hydraulic control system having over-pressure protection |
US9187878B2 (en) | 2012-08-31 | 2015-11-17 | Caterpillar Inc. | Hydraulic control system having swing oscillation dampening |
US9328744B2 (en) | 2012-08-31 | 2016-05-03 | Caterpillar Inc. | Hydraulic control system having swing energy recovery |
US9388829B2 (en) | 2012-08-31 | 2016-07-12 | Caterpillar Inc. | Hydraulic control system having swing motor energy recovery |
US9388828B2 (en) | 2012-08-31 | 2016-07-12 | Caterpillar Inc. | Hydraulic control system having swing motor energy recovery |
CN114215925A (en) * | 2021-12-23 | 2022-03-22 | 国能(福州)热电有限公司 | Regulating valve |
-
1960
- 1960-09-02 GB GB3032260A patent/GB889893A/en not_active Expired
Cited By (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2415029A (en) * | 2004-06-12 | 2005-12-14 | Demag Delaval Ind Turbomachine | A hydraulic restrictor |
GB2415029B (en) * | 2004-06-12 | 2008-02-27 | Demag Delaval Ind Turbomachine | A hydraulic restrictor |
CN101929173A (en) * | 2010-08-11 | 2010-12-29 | 许世东 | Repairer for broken loading roadway |
US8776511B2 (en) | 2011-06-28 | 2014-07-15 | Caterpillar Inc. | Energy recovery system having accumulator and variable relief |
US8850806B2 (en) | 2011-06-28 | 2014-10-07 | Caterpillar Inc. | Hydraulic control system having swing motor energy recovery |
US8919113B2 (en) | 2011-06-28 | 2014-12-30 | Caterpillar Inc. | Hydraulic control system having energy recovery kit |
US9068575B2 (en) | 2011-06-28 | 2015-06-30 | Caterpillar Inc. | Hydraulic control system having swing motor energy recovery |
US9139982B2 (en) | 2011-06-28 | 2015-09-22 | Caterpillar Inc. | Hydraulic control system having swing energy recovery |
US9091286B2 (en) | 2012-08-31 | 2015-07-28 | Caterpillar Inc. | Hydraulic control system having electronic flow limiting |
US9086081B2 (en) | 2012-08-31 | 2015-07-21 | Caterpillar Inc. | Hydraulic control system having swing motor recovery |
US9145660B2 (en) | 2012-08-31 | 2015-09-29 | Caterpillar Inc. | Hydraulic control system having over-pressure protection |
US9187878B2 (en) | 2012-08-31 | 2015-11-17 | Caterpillar Inc. | Hydraulic control system having swing oscillation dampening |
US9328744B2 (en) | 2012-08-31 | 2016-05-03 | Caterpillar Inc. | Hydraulic control system having swing energy recovery |
US9388829B2 (en) | 2012-08-31 | 2016-07-12 | Caterpillar Inc. | Hydraulic control system having swing motor energy recovery |
US9388828B2 (en) | 2012-08-31 | 2016-07-12 | Caterpillar Inc. | Hydraulic control system having swing motor energy recovery |
CN114215925A (en) * | 2021-12-23 | 2022-03-22 | 国能(福州)热电有限公司 | Regulating valve |
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