CN101886405A - Main valve of small type hydraulic excavator with energy-saving excavation and high-efficient land leveling - Google Patents
Main valve of small type hydraulic excavator with energy-saving excavation and high-efficient land leveling Download PDFInfo
- Publication number
- CN101886405A CN101886405A CN2010102325832A CN201010232583A CN101886405A CN 101886405 A CN101886405 A CN 101886405A CN 2010102325832 A CN2010102325832 A CN 2010102325832A CN 201010232583 A CN201010232583 A CN 201010232583A CN 101886405 A CN101886405 A CN 101886405A
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- connection
- pump
- valve
- dipper
- land leveling
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Classifications
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- 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
-
- 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
- E02F9/2221—Control of flow rate; Load sensing arrangements
- E02F9/2239—Control of flow rate; Load sensing arrangements using two or more pumps with cross-assistance
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- 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
- E02F3/30—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom
- E02F3/32—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 with a dipper-arm pivoted on a cantilever beam, i.e. boom working downwardly and towards the machine, e.g. with backhoes
- E02F3/325—Backhoes of the miniature type
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- 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
-
- 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
- E02F9/2278—Hydraulic circuits
- E02F9/2282—Systems using center bypass type changeover valves
-
- 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
- E02F9/2278—Hydraulic circuits
- E02F9/2285—Pilot-operated systems
-
- 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
- E02F9/2278—Hydraulic circuits
- E02F9/2292—Systems with two or more pumps
-
- 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
- E02F9/2278—Hydraulic circuits
- E02F9/2296—Systems with a variable displacement pump
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- 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
- F15B2211/20576—Systems with pumps with multiple pumps
-
- 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
- F15B2211/31—Directional control characterised by the positions of the valve element
- F15B2211/3105—Neutral or centre positions
- F15B2211/3116—Neutral or centre positions the pump port being open in the centre position, e.g. so-called open centre
Abstract
The invention discloses a main valve of a small type hydraulic excavator with energy-saving excavation and high-efficient land leveling, an inlet of a land leveling mode selecting valve (4) is connected with a bulldozer shovel linkage (3), one outlet of the land leveling mode selecting valve (4) is connected with a moving arm 2/breaking hammer linkage (5), the other outlet is connected with an oil return passage T2, one end of a passage (12) is connected with a dipper handle 1 linkage (6), and the other end is connected with a bucket linkage (10). The land leveling mode selecting valve (V4) is increased in the main valve, when the pilot pressure is acted on the land leveling mode selecting valve, the land leveling mode is started, and oil of a P3 pump can be supplied for a dipper handle and a bucket, thereby accelerating the land leveling speed and realizing the high efficiency; when in the excavation mode, the main valve can change the way of leading the traditional P3 pump to participate in confluence, use a P1 pump and a P2 pump for realizing the confluence to the dipper handle, and supply the oil to the dipper handle and the moving arm, thereby avoiding the excess flow loss of the P3 pump and achieving the energy-saving effect.
Description
Technical field
The present invention relates to a kind of throttle type main control valve of small type hydraulic excavator hydraulic system, particularly relate to a kind of high efficient and energy saving hydraulic loop of energy-saving excavation and high-efficient land leveling of small type hydraulic excavator.
Background technology
Small type hydraulic excavator, it is a kind of technology integrated level height of extensive use, multi-functional, energy-efficient, handling good, man-machine environment close friend's etc. small-sized machine, but main control valve as its control device, the banked direction control valves of other engineering machinery on year-on-year basis, have functional integration height, assignment of traffic meticulous, move characteristics such as compound more.Excavate these two kinds of functions pacifically, it is the main task of small type hydraulic excavator, correspond to its hydraulic circuit, particularly dipper and scraper bowl excavate the performance quality in loop simultaneously, receive outer pendulum rapid movement pattern in the time of pacifically in the dipper, with directly having influence on the energy-conservation of mini-excavator operation, be one of key technology of excavator with efficient.
Usually, the throttle type main control valve of small type hydraulic excavator is driven by two or three hydraulic variable displacement pumps, and general power control reaches that empty action speed is fast, level land speed is fast, excavation speed fast, the purpose of good energy-conserving effect when excavating.Several major control modes of throttle type main valve are at present: during excavation--receive in-the scraper bowl by the P1 oil pump feed, receive in the dipper by the P2+P3 oil pump feed; During the level land--receive outer pendulum in the-scraper bowl by the P1 oil pump feed, receive outer pendulum in the dipper by the P2+P3 fuel feeding, swing arm rises by the P1+P2 oil pump feed, and swing arm is transferred the oil pump feed by P1; Because P3 pump set pressure is less than P1 pump and P2 pump, P3 pump overflow when excavate hard soils, thus cause the loss of energy, and when the level land, because the P3 pump discharge is less, does not make full use of engine power, the speed of receiving outer pendulum in the dipper is also slow.
Summary of the invention
Speed was fast when technical problem to be solved by this invention provided a kind of one action, and the oil flow distribution is reasonable during composite move, the energy-conservation main valve of small type hydraulic excavator of energy-saving excavation and high-efficient land leveling efficiently pacifically time during excavation.
In order to solve the problems of the technologies described above, the main valve of small type hydraulic excavator of energy-saving excavation provided by the invention and high-efficient land leveling, comprise straight line moving valve connection, revolution connection, the dozer connection, swing arm 2 the quartering hammer connection, dipper 1, left lateral is walked connection, the oil-feed connection, and right lateral is walked connection, swing arm 1, the scraper bowl connection, dipper 2 and back oil road T2, the import of level land model selection valve is connected with described dozer connection, outlet of described level land model selection valve and described swing arm 2 the quartering hammer connection be connected, another outlet is connected with described back oil road T2, and path one end is connected with described dipper 1, and the other end is connected with described scraper bowl connection.
Described path offered throttle orifice before entering described scraper bowl connection.
Described level land model selection valve is the hydraulic control two-position three-way valve.
Adopt the energy-saving excavation of technique scheme and the main valve of small type hydraulic excavator of high-efficient land leveling, increasing by a valve in main valve is level land model selection valve, pressing when guide oil is common mining mode when not setting up, when the guide oil pressure acts on the level land model selection valve core, the level land pattern is opened, and main valve fuel feeding route changes.
Consideration is received the one action time and is accounted for 15% of the whole excavation time in the dipper when general dredge operation, the time that action is closed in the interior recovery of receipts and dipper in the scraper bowl accounts for 70%, the one action time of receipts accounts for 15% in the scraper bowl, during this period, swing arm is done trimming movement, to cooperate the action of dipper and scraper bowl, P1 and P2 pump are identical two Variable plunger pumps in the general three pump system, P3 is a quantitative gear pump, and the set pressure of P1 and P2 is greater than the set pressure of P3, metered flow is also greater than the metered flow of P3, excavating under the big situation of load, if adopt present throttle type main valve, the overflow too early of P3 pump, thereby cause the waste of energy, make that also excavation speed is slower, in the technique scheme, receive outer pendulum in when described mining mode fuel feeding circuit is the dipper one action by P1 pump and P2 oil pump feed, receive the outer fuel feeding after throttling of putting by P1 pump and P2 pump in the scraper bowl, swing arm is by P1 pump and P2 oil pump feed, contrast original system, because P1 pump and P2 pump are identical two pumps, recover when closing action in receipts and the scraper bowl in the dipper and be no more than under the situation of set pressure, avoided energy loss, and when in scraper bowl, receiving one action, P1 pump and P2 pump are given the scraper bowl fuel feeding simultaneously, also accelerated the speed that scraper bowl excavates, after opening the level land pattern, because load is less during the level land, the rate request of receiving outer pendulum in the dipper is fast, swing arm and scraper bowl action are less, P3 preferentially gives the dipper fuel feeding by level land model selection valve, again through giving the scraper bowl fuel feeding after the throttle orifice throttling, and the fuel feeding circuit of P1 and P2 does not change, be that P1 preferentially gives the swing arm fuel feeding, again through giving dipper and scraper bowl fuel feeding after the throttle orifice throttling, because the dipper load is less, P2 preferentially gives the dipper fuel feeding by oil circuit in parallel, the fraction oil content flows to swing arm, scraper bowl, thereby dipper is P1, P2, P3 three pump high volume fuel feeding, swing arm are P1 and P2 double pump fuel feeding, scraper bowl is P1, P2, the P3 fuel feeding has been accelerated level land speed.
Actual test and theory analysis according to small type hydraulic excavator different work operating mode, the present invention proposes the loop, double pump interflow under dipper and scraper bowl excavation state, with the dipper three pump high volume oil supply loops under the pattern of level land, formed a kind of efficient energy-saving main control valve, it is ingenious to have the oil circuit design, speed is fast during one action, and oil flow distribution rational characteristics during composite move can well embody energy-conservation high efficiency pacifically time the when excavating.
Description of drawings
Fig. 1 is a mountains and rivers intelligence SWE70 main valve schematic diagram,
Fig. 2 is the DH60 of a Daewoo main valve schematic diagram;
Fig. 3 is a main valve hydraulic schematic diagram in the embodiment of the invention;
Fig. 4 is the level land model selection valve schematic diagram in the embodiment of the invention;
Fig. 5 excavates operating mode main valve fuel feeding wiring diagram in the embodiment of the invention;
Fig. 6 is a level land operating mode main valve fuel feeding wiring diagram in the embodiment of the invention.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 and Fig. 2 are two kinds of common small type hydraulic excavator three pump system main valve hydraulic schematic diagrams, in three pump system, P1 pump and P2 pump are two identical plunger displacement pumps, the P3 pump is a flow and all little than the P1 pump gear pump of set pressure, the main valve system of Fig. 1 is by straight line moving valve connection (M1), revolution connection (M2), dozer connection (M3), broken connection (M4), dipper connection (M5), swing arm 2 (M6), right lateral is walked connection (M7), left lateral is walked connection (M8), swing arm 1 (M9), scraper bowl connection (M10) is formed, in this system, receive in the dipper outer pendulum by P2 pump and P3 pump by collaborating fuel feeding in the valve, receive outer pendulum in the scraper bowl by the P1 oil pump feed, swing arm rises by P1 and P2 pump with two combined stream fuel feeding, when excavating heavy duty, the overflow too early of P3 pump, cause the waste of energy and slowing down of speed, and when the level land, because the P3 pump discharge is less, make that also the outer slew rate degree of the interior receipts of dipper is slower, level land efficient is low, and main valve system shown in Figure 2 turns round connection (S2) by straight line moving valve connection (S1), dozer connection (S3), swing arm deflection connection (S4), swing arm 2 broken connection (S5), dipper 1 (S6), left lateral is walked connection (S7), right lateral is walked connection (S8), swing arm 1 (S9), scraper bowl connection (S10), dipper 2 (S11) is formed, in this three pump system, what receive outer pendulum employing in the dipper is that P1 pump and P2 pump collaborate fuel feeding outward by two valves, and it also is that P1 pump and P2 pump are collaborated outward by two valves that swing arm rises, when excavating operating mode, because P1 pump and P2 pump are identical two pumps, so can not occur the situation of the too early overflow of one of them pump during the fuel feeding of interflow, avoided energy loss, but when the operating mode of level land, because load is little, the P3 pump is not given the equipment fuel feeding, makes the power of motor not maximize the use, and level land speed is lower.
Shown in Figure 3 is the energy-saving excavation and the high-efficient land leveling main valve hydraulic schematic diagram of a kind of small type hydraulic excavator of the present invention, main valve is a chip banked direction control valves structure, by straight line moving valve connection 1, revolution connection 2, dozer connection 3, level land model selection valve connection 4, swing arm 2 quartering hammer connection 5, dipper 16, left lateral is walked connection 7, the oil-feed connection, and right lateral is walked connection 8, swing arm 19, scraper bowl connection 10, dipper 2 11 is formed, and wherein level land model selection valve connection 4 is the hydraulic control two-position three-way valve, as shown in Figure 4, the import M of level land model selection valve 4 and dozer connection 3 is connected, outlet N of level land model selection valve 4 and swing arm 2 quartering hammer join 5 and be connected, another exports W and is connected with back oil road T2, when guide oil presses Pi4 to set up, the level land pattern is opened, and when guide oil presses Pi4 not set up, closes the level land pattern, be common mining mode, its oil circuit connected mode as shown in Figure 3.Swing arm 2 the quartering hammer connection (5 join for swing arm interflow and the shared valve of quartering hammer, guide's oil pressure is swing arm interflow connection when leading to the left side, it in the time of on the right of guide's oil pressure is logical the quartering hammer connection, the swing arm interflow adopts the mode at the outer interflow of external pipeline valve to collaborate, as shown in Figure 3, dipper 16 and dipper 2 11 also are to dipper action interflow by the outer interflow of valve mode, offer path 12 in the valve body of main valve, path 12 1 ends are connected with dipper 16, the other end is connected with scraper bowl connection 10, path 12 offered throttle orifice before entering scraper bowl connection 10, increase a path for the oil of P2 and P3 enters scraper bowl connection 10.
Fig. 5 is the excavation operating mode loop diagram of main valve, and dipper and swing arm adopt the outer interflow of valve mode respectively by two alliance oil, as shown in Figure 5, swing arm rises by P1 pump and P2 oil pump feed, receives outer pendulum in the dipper by P1 pump and P2 oil pump feed, receives outer pendulum in the scraper bowl by P1 pump and P2 oil pump feed.The oil circuit trend of three pumps is: the hydraulic oil of P1 pump output, walk the meta path of connection 8 through right lateral after, by oil circuit in parallel to swing arm 19, scraper bowl connection 10, after dipper 2 11 fuel feeding, the hydraulic oil of P2 pump output are walked the meta path of connection 7 through left lateral, by oil circuit in parallel to dipper 16, swing arm 2 quartering hammer connection 5, scraper bowl joins 10 fuel feeding.Then through straight line moving valve connection 1, revolution joins 2 to the P3 pump, and the meta path of dozer connection 3 is the outlet W off-load oil sump tank of model selection valve connection 4 pacifically.
Fig. 6 is the level land operating mode loop diagram of described new main valve, dipper and swing arm are respectively by two alliance oil, adopt the outer interflow of valve mode, as shown in Figure 6, swing arm rises by P1 pump and P2 oil pump feed, receives outer pendulum in the dipper by the P1 pump, P2 pump and P3 oil pump feed, receive outer pendulum in the scraper bowl by the P1 pump, P2 pump and P3 oil pump feed.The oil circuit trend of three pumps is: the hydraulic oil of P1 pump output, walk the meta path of connection 8 through right lateral after, by oil circuit in parallel to swing arm 19, scraper bowl connection 10, after dipper 2 11 fuel feeding, the hydraulic oil of P2 pump output are walked the meta path of connection 7 through left lateral, by oil circuit in parallel to dipper 16, swing arm 2 quartering hammer connection 5, scraper bowl joins 10 fuel feeding.The P3 pump is then through straight line moving valve connection 1, revolution connection 2, the meta path of dozer connection 3 is the outlet N of model selection valve connection 4 pacifically, by oil circuit in parallel to swing arm 2 quartering hammer connection 5, dipper 16, scraper bowl join 10 fuel feeding.
Claims (3)
1. the main valve of small type hydraulic excavator of energy-saving excavation and high-efficient land leveling, comprise straight line moving valve connection (1), revolution connection (2), dozer connection (3), swing arm 2 quartering hammer connection (5), dipper 1 (6), left lateral is walked connection (7), the oil-feed connection, right lateral is walked connection (8), swing arm 1 (9), scraper bowl connection (10), dipper 2 (11) and back oil road T2, it is characterized in that: the import of level land model selection valve (4) joins (3) with described dozer and is connected, outlet of described level land model selection valve (4) and described swing arm 2 quartering hammer connection (5) be connected, another outlet is connected with described back oil road T2, path (12) one ends are connected with described dipper 1 (6), and the other end joins (10) with described scraper bowl and is connected.
2. the main valve of small type hydraulic excavator of energy-saving excavation according to claim 1 and high-efficient land leveling is characterized in that: described path (12) offers throttle orifice before entering described scraper bowl connection (10).
3. the main valve of small type hydraulic excavator of energy-saving excavation according to claim 1 and 2 and high-efficient land leveling is characterized in that: described level land model selection valve (4) is the hydraulic control two-position three-way valve.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102325832A CN101886405B (en) | 2010-07-21 | 2010-07-21 | Main valve of small type hydraulic excavator with energy-saving excavation and high-efficient land leveling |
| EP11809285.7A EP2597211B1 (en) | 2010-07-21 | 2011-07-20 | Hydraulic excavator |
| PCT/CN2011/077403 WO2012010097A1 (en) | 2010-07-21 | 2011-07-20 | Hydraulic excavator main valve and hydraulic excavator having same |
| KR1020137004303A KR20130143550A (en) | 2010-07-21 | 2011-07-20 | Hydraulic excavator main valve and hydraulic excavator having same |
| JP2013519947A JP5869567B2 (en) | 2010-07-21 | 2011-07-20 | Main valve of hydraulic excavator and hydraulic excavator provided with the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102325832A CN101886405B (en) | 2010-07-21 | 2010-07-21 | Main valve of small type hydraulic excavator with energy-saving excavation and high-efficient land leveling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101886405A true CN101886405A (en) | 2010-11-17 |
| CN101886405B CN101886405B (en) | 2012-01-11 |
Family
ID=43072481
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102325832A Active CN101886405B (en) | 2010-07-21 | 2010-07-21 | Main valve of small type hydraulic excavator with energy-saving excavation and high-efficient land leveling |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP2597211B1 (en) |
| JP (1) | JP5869567B2 (en) |
| KR (1) | KR20130143550A (en) |
| CN (1) | CN101886405B (en) |
| WO (1) | WO2012010097A1 (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012010097A1 (en) * | 2010-07-21 | 2012-01-26 | 湖南山河智能机械股份有限公司 | Hydraulic excavator main valve and hydraulic excavator having same |
| CN102828536A (en) * | 2012-09-18 | 2012-12-19 | 三一重机有限公司 | Excavator convergent flow control system and excavator |
| CN104005435A (en) * | 2014-06-06 | 2014-08-27 | 山东中川液压有限公司 | Efficient energy-saving environment-friendly oil-hydraulic hybrid powder excavator |
| CN104006037A (en) * | 2014-06-06 | 2014-08-27 | 山东中川液压有限公司 | Three-pump type hydraulic excavator oil supply device |
| CN104454737A (en) * | 2014-12-16 | 2015-03-25 | 山河智能装备股份有限公司 | Sheet multiway valve hydraulic system used for mini excavator |
| CN104769286A (en) * | 2012-11-07 | 2015-07-08 | 萱场工业株式会社 | Fluid pressure control device for power shovel |
| CN108916136A (en) * | 2018-08-06 | 2018-11-30 | 泉州鑫豪工程机械科技有限公司 | A kind of mini-excavator hydraulic system |
| CN111425468A (en) * | 2020-04-14 | 2020-07-17 | 广西玉柴重工有限公司 | Pump bridge acceleration module of three-pump throttling system |
| CN112963393A (en) * | 2021-02-18 | 2021-06-15 | 三一重机有限公司 | Excavator multi-way valve, excavator hydraulic system and control method of excavator multi-way valve |
| CN113152550A (en) * | 2021-04-07 | 2021-07-23 | 柳州柳工挖掘机有限公司 | Operation mode control system and method and excavator |
| CN111425468B (en) * | 2020-04-14 | 2024-04-26 | 广西玉柴重工有限公司 | Pump bridge acceleration module of three-pump throttling system |
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| CN103883577B (en) * | 2014-03-28 | 2016-05-04 | 四川长江液压件有限责任公司 | Mini-excavator banked direction control valves |
| CN104153406A (en) * | 2014-08-05 | 2014-11-19 | 山河智能装备股份有限公司 | Excavator with function of switching oil hydraulic circuit according to different working conditions |
| KR101867528B1 (en) | 2017-11-20 | 2018-07-17 | 황종원 | Relief valve assembly for anti drop valve |
| KR101867525B1 (en) | 2017-11-20 | 2018-07-17 | 황종원 | Anti drop valve |
| CN112177996B (en) * | 2020-09-18 | 2023-05-05 | 江苏徐工工程机械研究院有限公司 | Positive flow getting-on/off composite stability control system and method |
| CN115030259B (en) * | 2022-07-26 | 2024-04-09 | 徐工集团工程机械股份有限公司科技分公司 | Multi-way valve for loader, loader hydraulic system and loader |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0781888A1 (en) * | 1995-12-27 | 1997-07-02 | Hitachi Construction Machinery Co., Ltd. | Hydraulic circuit for hydraulic shovel |
| WO2006070501A1 (en) * | 2004-12-28 | 2006-07-06 | Shin Caterpillar Mitsubishi Ltd. | Control circuit of construction machine |
| CN100464036C (en) * | 2005-03-28 | 2009-02-25 | 广西柳工机械股份有限公司 | Path control system used for hydraulic digger operating device and its method |
| CN101509266A (en) * | 2009-02-23 | 2009-08-19 | 三一重机有限公司 | Control method for improving smoothening capability of excavator |
| CN201738353U (en) * | 2010-07-21 | 2011-02-09 | 湖南山河智能机械股份有限公司 | Main valve of small-sized hydraulic excavator with energy-saving excavating and high-efficiency ground flattening |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3139792B2 (en) * | 1991-10-08 | 2001-03-05 | カヤバ工業株式会社 | Straight running circuit for construction vehicles |
| JP2000144805A (en) * | 1998-11-06 | 2000-05-26 | Komatsu Ltd | Outrigger expansion speed control device |
| JP4137431B2 (en) * | 2001-11-09 | 2008-08-20 | ナブテスコ株式会社 | Hydraulic circuit |
| JP2003184815A (en) * | 2001-12-17 | 2003-07-03 | Hitachi Constr Mach Co Ltd | Hydraulic controlled device of construction machine and hydraulic controlled device of hydraulic power shovel |
| JP4223421B2 (en) * | 2004-03-10 | 2009-02-12 | ナブテスコ株式会社 | Hydraulic circuit for construction machinery |
| US7165395B2 (en) * | 2005-02-11 | 2007-01-23 | Deere & Company | Semi-active ride control for a mobile machine |
| KR101265342B1 (en) * | 2006-12-22 | 2013-05-20 | 두산인프라코어 주식회사 | Flat and slant improvement device of excavator |
| CN101886405B (en) * | 2010-07-21 | 2012-01-11 | 山河智能装备股份有限公司 | Main valve of small type hydraulic excavator with energy-saving excavation and high-efficient land leveling |
-
2010
- 2010-07-21 CN CN2010102325832A patent/CN101886405B/en active Active
-
2011
- 2011-07-20 JP JP2013519947A patent/JP5869567B2/en active Active
- 2011-07-20 KR KR1020137004303A patent/KR20130143550A/en not_active Application Discontinuation
- 2011-07-20 WO PCT/CN2011/077403 patent/WO2012010097A1/en active Application Filing
- 2011-07-20 EP EP11809285.7A patent/EP2597211B1/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0781888A1 (en) * | 1995-12-27 | 1997-07-02 | Hitachi Construction Machinery Co., Ltd. | Hydraulic circuit for hydraulic shovel |
| WO2006070501A1 (en) * | 2004-12-28 | 2006-07-06 | Shin Caterpillar Mitsubishi Ltd. | Control circuit of construction machine |
| CN100464036C (en) * | 2005-03-28 | 2009-02-25 | 广西柳工机械股份有限公司 | Path control system used for hydraulic digger operating device and its method |
| CN101509266A (en) * | 2009-02-23 | 2009-08-19 | 三一重机有限公司 | Control method for improving smoothening capability of excavator |
| CN201738353U (en) * | 2010-07-21 | 2011-02-09 | 湖南山河智能机械股份有限公司 | Main valve of small-sized hydraulic excavator with energy-saving excavating and high-efficiency ground flattening |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2012010097A1 (en) * | 2010-07-21 | 2012-01-26 | 湖南山河智能机械股份有限公司 | Hydraulic excavator main valve and hydraulic excavator having same |
| CN102828536A (en) * | 2012-09-18 | 2012-12-19 | 三一重机有限公司 | Excavator convergent flow control system and excavator |
| CN102828536B (en) * | 2012-09-18 | 2015-01-14 | 三一重机有限公司 | Excavator convergent flow control system and excavator |
| CN104769286A (en) * | 2012-11-07 | 2015-07-08 | 萱场工业株式会社 | Fluid pressure control device for power shovel |
| CN104769286B (en) * | 2012-11-07 | 2016-02-24 | Ｋｙｂ株式会社 | The fluid pressure control device of shovel |
| CN104006037A (en) * | 2014-06-06 | 2014-08-27 | 山东中川液压有限公司 | Three-pump type hydraulic excavator oil supply device |
| CN104005435A (en) * | 2014-06-06 | 2014-08-27 | 山东中川液压有限公司 | Efficient energy-saving environment-friendly oil-hydraulic hybrid powder excavator |
| CN104005435B (en) * | 2014-06-06 | 2016-12-07 | 山东中川液压有限公司 | A kind of high-efficient energy-saving environment friendly oil-liquid hybrid electric excavator |
| CN104454737A (en) * | 2014-12-16 | 2015-03-25 | 山河智能装备股份有限公司 | Sheet multiway valve hydraulic system used for mini excavator |
| CN108916136A (en) * | 2018-08-06 | 2018-11-30 | 泉州鑫豪工程机械科技有限公司 | A kind of mini-excavator hydraulic system |
| CN111425468A (en) * | 2020-04-14 | 2020-07-17 | 广西玉柴重工有限公司 | Pump bridge acceleration module of three-pump throttling system |
| CN111425468B (en) * | 2020-04-14 | 2024-04-26 | 广西玉柴重工有限公司 | Pump bridge acceleration module of three-pump throttling system |
| CN112963393A (en) * | 2021-02-18 | 2021-06-15 | 三一重机有限公司 | Excavator multi-way valve, excavator hydraulic system and control method of excavator multi-way valve |
| CN113152550A (en) * | 2021-04-07 | 2021-07-23 | 柳州柳工挖掘机有限公司 | Operation mode control system and method and excavator |
| CN113152550B (en) * | 2021-04-07 | 2022-12-20 | 柳州柳工挖掘机有限公司 | Operation mode control system and method and excavator |
Also Published As
| Publication number | Publication date |
|---|---|
| EP2597211A4 (en) | 2017-11-29 |
| CN101886405B (en) | 2012-01-11 |
| EP2597211B1 (en) | 2021-05-26 |
| EP2597211A1 (en) | 2013-05-29 |
| KR20130143550A (en) | 2013-12-31 |
| JP5869567B2 (en) | 2016-02-24 |
| WO2012010097A1 (en) | 2012-01-26 |
| JP2013532781A (en) | 2013-08-19 |
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Address after: 410100 Hunan province Changsha Xingsha City Economic and Technological Development Zone Li Xiang Road No. 16 sunward Industrial Park Applicant after: Sunward Intelligent Equipment Co., Ltd. Address before: 410100 Hunan province Changsha Xingsha City Economic and Technological Development Zone Li Xiang Road No. 2 sunward Industrial Park Applicant before: Shanhe Intelligent Machinery Co., Ltd., Hunan |
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