CN201738353U - Main valve of small-sized hydraulic excavator with energy-saving excavating and high-efficiency ground flattening - Google Patents
Main valve of small-sized hydraulic excavator with energy-saving excavating and high-efficiency ground flattening Download PDFInfo
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- CN201738353U CN201738353U CN2010202665030U CN201020266503U CN201738353U CN 201738353 U CN201738353 U CN 201738353U CN 2010202665030 U CN2010202665030 U CN 2010202665030U CN 201020266503 U CN201020266503 U CN 201020266503U CN 201738353 U CN201738353 U CN 201738353U
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Abstract
The utility model discloses a main valve of a small-sized hydraulic excavator with energy-saving excavating and high-efficiency ground flattening. An inlet of a ground flattening mode selection valve (4) is connected with a dozer blade unit (3), one outlet of the ground flattening mode selection valve (4) is connected with a movable arm 2/breaking hammer unit (5), and the other outlet is connected with an oil return way T2; one end of a passage (12) is connected with a bucket rod 1 unit (6), and the other end is connected with a bucket unit (10). As the ground flattening mode selection valve (4) is additionally arranged in the main valve, when pilot pressure acts on the ground flattening mode selection valve, the ground flattening mode is started, and oil of a pump P3 can be supplied to a bucket rod and a bucket, so as to increase the ground flattening speed and realize high efficiency; when in the excavating mode, the traditional way that the pump P3 participates in flow combination is changed into that a pump P1 and a pump P2 combine flow to supply oil for the bucket rod, the bucket and the movable arm, thereby avoiding overflow losses of the pump P3 and achieving the energy-saving effect.
Description
Technical field
The utility model relates to a kind of throttle type main control valve of small type hydraulic excavator hydraulic system, particularly relates 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.
The utility model content
Speed was fast when technical problem to be solved in the utility model 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 energy-saving excavation that the utility model provides and the main valve of small type hydraulic excavator of 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 utility model 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 among the utility model embodiment;
Fig. 4 is the level land model selection valve schematic diagram among the utility model embodiment;
Fig. 5 excavates operating mode main valve fuel feeding wiring diagram among the utility model embodiment;
Fig. 6 is a level land operating mode main valve fuel feeding wiring diagram among the utility model embodiment.
The specific embodiment
The utility model is described in further detail 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 (M 1), 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 described in the utility model, 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 P i 4 to set up, the level land pattern is opened, and when guide oil presses P i 4 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 (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202665030U CN201738353U (en) | 2010-07-21 | 2010-07-21 | Main valve of small-sized hydraulic excavator with energy-saving excavating and high-efficiency ground flattening |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202665030U CN201738353U (en) | 2010-07-21 | 2010-07-21 | Main valve of small-sized hydraulic excavator with energy-saving excavating and high-efficiency ground flattening |
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| Publication Number | Publication Date |
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| CN201738353U true CN201738353U (en) | 2011-02-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010202665030U Expired - Lifetime CN201738353U (en) | 2010-07-21 | 2010-07-21 | Main valve of small-sized hydraulic excavator with energy-saving excavating and high-efficiency ground flattening |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886405A (en) * | 2010-07-21 | 2010-11-17 | 湖南山河智能机械股份有限公司 | Main valve of small type hydraulic excavator with energy-saving excavation and high-efficient land leveling |
| CN102677734A (en) * | 2012-05-25 | 2012-09-19 | 浙江苏强格液压股份有限公司 | Hydraulic system of excavating machine |
| CN104763008A (en) * | 2015-04-21 | 2015-07-08 | 山河智能装备股份有限公司 | Multi-tandem valve group of middle-sized hydraulic excavator |
-
2010
- 2010-07-21 CN CN2010202665030U patent/CN201738353U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101886405A (en) * | 2010-07-21 | 2010-11-17 | 湖南山河智能机械股份有限公司 | Main valve of small type hydraulic excavator with energy-saving excavation and high-efficient land leveling |
| 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 |
| CN102677734A (en) * | 2012-05-25 | 2012-09-19 | 浙江苏强格液压股份有限公司 | Hydraulic system of excavating machine |
| CN102677734B (en) * | 2012-05-25 | 2015-07-15 | 浙江苏强格液压股份有限公司 | Hydraulic system of excavating machine |
| CN104763008A (en) * | 2015-04-21 | 2015-07-08 | 山河智能装备股份有限公司 | Multi-tandem valve group of middle-sized hydraulic excavator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20110209 Effective date of abandoning: 20120111 |