CN111058509A - Main control valve for realizing flow distribution of excavator bucket - Google Patents
Main control valve for realizing flow distribution of excavator bucket Download PDFInfo
- Publication number
- CN111058509A CN111058509A CN201911420055.7A CN201911420055A CN111058509A CN 111058509 A CN111058509 A CN 111058509A CN 201911420055 A CN201911420055 A CN 201911420055A CN 111058509 A CN111058509 A CN 111058509A
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- 206010015856 Extrasystoles Diseases 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 93
- 150000001875 compounds Chemical class 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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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
- E02F9/2264—Arrangements or adaptations of elements for hydraulic drives
- E02F9/2267—Valves or distributors
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses a main control valve for realizing flow distribution of an excavator bucket, and belongs to the technical field of engineering machinery. The main control valve overcomes the defects of low efficiency and high oil consumption of the traditional main control valve in the prior art. The main structure of the hydraulic control valve comprises a left valve body and a right valve body, the left valve body is connected with the right valve body, a right valve body bypass oil channel is arranged in the right valve body, a bucket connecting valve is installed on the outer end face of the right valve body, a priority valve is arranged on a valve rod oil channel of the right valve body bypass oil channel and the bucket connecting valve, and two signal ends of the priority valve are respectively connected with a pilot oil channel 4pc3 and a pilot oil channel dr 7. The invention is mainly used for engineering machinery.
Description
The technical field is as follows:
the invention belongs to the technical field of engineering machinery, and particularly relates to a main control valve for realizing flow distribution of an excavator bucket.
Background art:
the main control valve is the most important control element in the hydraulic system of the excavator, and the flow distribution scheme of the main control valve of the excavator directly determines the characteristics of oil consumption, efficiency and the like of the excavator; with the continuous development of domestic hydraulic infrastructure, the design and processing production of the main control valve of the autonomous excavator become possible, and the main control valve of the excavator is designed facing to the market and the customer requirements, so that the performance of the excavator is greatly improved.
The distribution of the bucket flow of the excavator main control valve in the prior art is influenced by the pilot pressure at the end part of a bucket valve rod; the simple flow distribution scheme of the main control valve ensures that the controllability is poor when the bucket and the movable arm perform combined actions, has high requirements on the control level of a driver, and has high requirements on the debugging work during the technical debugging loop of the movable arm and the bucket valve rod. Therefore, the flow distribution of the existing main control valve is controlled only by the area characteristic on the valve rod and a driver, and a plurality of problems exist: 1. poor compound action controllability: the boom and the bucket act simultaneously, and the flow is preferentially flowed to the bucket due to the low load of the bucket, and the boom is slow, is stuck or even does not act; 2. the requirement on drivers is high: the compound action controllability is poor, a driver needs to continuously adjust the handle amplitude, for example, if the bucket moves too fast, the action amplitude of the handle of the bucket is required to be small, and the action amplitude of the handle of the movable arm is required to be large; 3. cause inefficiency, oil consumption increase: in order to take account of compatibility, the discharge capacity of the pump cannot be fully utilized, the efficiency of the whole machine is low, and the oil consumption is increased because the local pressure loss is overlarge.
The invention content is as follows:
the invention aims to overcome the defects of the prior art and provides a main control valve for realizing flow distribution of a bucket of an excavator, which can realize energy conservation and improve the action speed of the bucket through a confluence function.
In order to realize the purpose, the invention is realized by adopting the following technical scheme:
the utility model provides a realize main control valve of excavator scraper bowl flow distribution, includes left valve body and right valve body, left side valve body is connected with right valve body, be equipped with right valve body bypass oil duct in the right valve body, install scraper bowl on the outer terminal surface of right valve body and ally oneself with the valve, be equipped with the priority valve between the valve rod oil circuit of right valve body bypass oil duct and scraper bowl antithetical couplet valve, the both ends signal of priority valve are connected with guide's oil circuit 4pc3 and guide's oil circuit dr7 respectively.
Preferably, a left valve body central oil passage is arranged in the left valve body, a left valve body central bypass valve and an arm one-link valve are mounted on the outer end face of the left valve body, the left valve body central bypass valve is communicated with the arm one-link valve through the left valve body central oil passage, the left valve body is communicated with the right valve body through a bucket confluence oil passage, the left end of the bucket confluence oil passage is communicated with the left valve body central oil passage between the left valve body central bypass valve and the arm one-link valve, and the right end of the bucket confluence oil passage is connected to an oil passage between the priority valve and the bucket link valve.
Preferably, a bucket confluence check valve is arranged on the bucket confluence oil passage.
Preferably, an oil return flow control valve is arranged on the right oil passage B1 of the bucket linkage valve, and two signal ends of the oil return flow control valve are respectively connected with the left oil passage a1 of the bucket linkage valve and the pilot oil passage dr 9.
Preferably, a right valve body central oil duct is further arranged in the right valve body, a straight-line walking linkage valve, a right walking linkage valve, a movable arm one-linkage valve and an arm two-linkage valve are further mounted on the outer end face of the right valve body, and the right valve body central oil duct is sequentially communicated with the straight-line walking linkage valve, the right walking linkage valve, the movable arm one-linkage valve, the bucket linkage valve and the arm two-linkage valve.
Preferably, the outer end face of the left valve body is further provided with a multifunctional connecting valve, a movable arm connecting valve, a rotary connecting valve and a left walking connecting valve, and the left valve body central oil duct is sequentially communicated with the left walking connecting valve, the rotary connecting valve, the movable arm connecting valve, the multifunctional connecting valve, the first bucket rod connecting valve and the left valve body central bypass valve.
Preferably, the right valve body central oil passage in front of the straight-line walking connecting valve oil inlet passage is communicated with the right valve body bypass oil passage.
Preferably, the oil return flow control valve is a two-position two-way valve.
Compared with the prior art, the invention has the beneficial effects that:
1. energy conservation: before the confluence check valve is not arranged, P1 pressure oil of the left valve body directly returns through a left valve body central bypass valve to cause energy loss, and the bucket acts, namely the P1 pressure oil of the left valve body is led to a bucket linkage valve of the right valve body to be utilized, so that the original flow loss is utilized, and therefore, energy conservation can be realized;
2. the working efficiency of the whole machine is improved: the P1 pressure oil is reused to improve the bucket speed, so that the whole machine operation efficiency is improved, when the bucket acts, the pressure oil of the left valve body P1 does not return oil through the left valve body central bypass valve, but directly flows to the bucket through the bucket confluence oil passage and the bucket confluence check valve, the P1 and the P2 pressure oil supply oil to the bucket simultaneously, namely, the confluence function is realized, and the bucket action speed can be improved through the confluence function;
3. the whole machine has better maneuverability: the utilization of the priority valve and the return flow control valve enables the controllability during the compound action to be better, when the 4pa2 is filled with pilot oil and the movable arm lifts, the pressure signal of the 4pa2 is transmitted to the 4pc2 and the 4pc3 on the whole machine at the same time, so that the flow of the P2 pressure oil distributed to the bucket chain is reduced, the control stability of the whole machine is ensured, and the priority of the movable arm to the bucket during the compound action is ensured.
Description of the drawings:
FIG. 1 is a hydraulic schematic of the present invention;
FIG. 2 is a front view of the assembly of the present invention;
FIG. 3 is a left side view of the assembly of the present invention;
FIG. 4 is a right side view of the assembly of the present invention;
FIG. 5 is a cross-sectional view A-A of FIG. 4;
FIG. 6 is a cross-sectional view taken along line B-B of FIG. 4;
FIG. 7 is a cross-sectional view of C-C of FIG. 4;
FIG. 8 is a cross-sectional view taken along line D-D of FIG. 4;
fig. 9 is a cross-sectional view of E-E in fig. 3.
In the figure: 1. a linear traveling linkage valve; 2. a right valve body central oil passage; 3. a right walking linkage valve; 4. a boom-linked valve; 5. an oil return flow control valve; 6. a priority valve; 7. a bucket linkage valve; 8. a bucket-arm dual valve; 9. a bucket confluence check valve; 10. a bucket converging oil passage; 11. a left valve body central bypass valve; 12. a left valve body central oil passage; 13. a bucket rod one-way valve; 14. a multifunctional union valve; 15. a boom double valve; 16. a rotary union valve; 17. a left walking linkage valve; 18. a left valve body; 19. the left valve body bypasses the oil duct; 20. a right valve body bypass oil passage; 21. and a right valve body.
The specific implementation mode is as follows:
the invention is further illustrated by the following specific examples in combination with the accompanying drawings.
Example 1:
as shown in fig. 1-4 and 8, a main control valve for realizing flow distribution of an excavator bucket comprises a left valve body 18 and a right valve body 21, wherein the left valve body 18 is connected with the right valve body 21 through a bolt, a right valve body bypass oil passage 20 is arranged in the right valve body 21, a bucket connecting valve 7 is mounted on the outer end face of the right valve body 21, a priority valve 6 is arranged between the right valve body bypass oil passage 20 and a valve rod oil passage of the bucket connecting valve 7, and two signal ends of the priority valve 6 are respectively connected with a pilot oil passage 4pc3 and a pilot oil passage dr 7; the priority valve 6 functions to control the flow rate P2 to be supplied preferentially to the boom at the time of a boom and bucket combined operation.
Example 2:
as shown in fig. 1, 5 and 7, a main control valve for realizing flow distribution of an excavator bucket is provided, a left valve body central oil passage 12 is arranged in a left valve body 18, a left valve body central bypass valve 11 and an arm one-link valve 13 are mounted on an outer end face of the left valve body 18, the left valve body central bypass valve 11 is communicated with the arm one-link valve 13 through the left valve body central oil passage 12, the left valve body 18 is communicated with a right valve body 21 through a bucket confluence oil passage 10, a left end of the bucket confluence oil passage 10 is communicated with the left valve body central oil passage 12 between the left valve body central bypass valve 11 and the arm one-link valve 13, and a right end of the bucket confluence oil passage is connected to an oil passage between a priority valve 6 and the. A bucket confluence check valve 9 is connected in series on the bucket confluence oil passage 10; the bucket merging check valve 9 functions to merge the pressure oil of the P1 pump into the bucket during the bucket operation.
An oil return flow control valve 5 is arranged on the right oil passage B1 of the bucket linkage valve 7, and two signal ends of the oil return flow control valve 5 are respectively connected with the left oil passage A1 and the pilot oil passage dr9 of the bucket linkage valve 7; the bucket confluence check valve 9, the priority valve 6 and the return oil flow control valve 5 simultaneously control the flow distribution of the bucket, and the return oil flow control valve 5 controls the flow of return oil when the movable arm and the bucket perform combined actions, so that the pressure difference is maintained, and the stability of the system is ensured.
The right valve body 21 is internally provided with a right valve body central oil duct 2, the outer end face of the right valve body 21 is further provided with a straight-line walking connecting valve 1, a right walking connecting valve 3, a movable arm one-connecting valve 4 and an arm two-connecting valve 8, oil is pumped out from a P2, and the right valve body central oil duct 2 is sequentially communicated with the straight-line walking connecting valve 1, the right walking connecting valve 3, the movable arm one-connecting valve 4, a bucket connecting valve 7 and the arm two-connecting valve 8.
The outer end face of the left valve body 18 is further provided with a multifunctional link valve 14, a movable arm link valve 15, a rotary link valve 16 and a left walking link valve 17, oil is pumped out from a P1 pump, and as shown in FIG. 6, the left valve body central oil duct 12 is sequentially communicated with the left walking link valve 17, the rotary link valve 16, the movable arm link valve 15, the multifunctional link valve 14, the arm link valve 13 and the left valve body central bypass valve 11.
The right valve body central oil passage 2 in front of the oil inlet passage of the straight-line walking connecting valve 1 is communicated with the right valve body bypass oil passage 20. A left valve body bypass oil passage 19 is further formed in the left valve body 18 and connected between the bucket rod one-way valve 13 and the multifunctional-way valve 14, and oil coming from the left valve body bypass oil passage 19 is a pilot pump P3; the oil return flow control valve 5 is a two-position two-way valve. The other portions are the same as in example 1.
The priority valve 6 functions to: when the boom lifting action is performed, pilot pressure oil is led to the main control valve corresponding to 4pa2, and when the boom lifting action is performed, as shown in fig. 8, a pressure signal of 4pa2 is simultaneously applied to 4pc3, so that the priority valve 6 controls the flow of the hydraulic oil from the right valve body bypass oil passage 20 to the bucket, and the priority of the boom during the combined action is ensured; meanwhile, an oil return flow control valve 5 is connected in series with an oil return channel B1 of the bucket linkage valve 7, and as shown in FIG. 9, the pressure of 4pa2 is simultaneously applied to 4pc2, so that the oil return area of the bucket is reduced, and the shaking is prevented.
The bucket confluence oil passage 10 and the bucket confluence check valve 9 are used for realizing pressure oil confluence during bucket operation by using pressure oil of the left valve body 18; when the bucket operates, related pilot oil is communicated to 5Pc3, so that the left valve body central bypass valve 11 is closed, pressure oil in the left valve body central oil passage 12 cannot return, and after a certain pressure is built, oil flows to the bucket linkage valve 7 through the bucket confluence oil passage 10 and the bucket confluence check valve 9, so that the pressure oil P1 of the left valve body 18 and the pressure oil P2 of the right valve body 21 are supplied to the bucket at the same time, and confluence is realized.
Claims (8)
1. The utility model provides a realize main control valve of excavator scraper bowl flow distribution, includes left valve body (18) and right valve body (21), left valve body (18) are connected its characterized in that with right valve body (21): the hydraulic excavator is characterized in that a right valve body bypass oil duct (20) is arranged in the right valve body (21), a bucket connecting valve (7) is installed on the outer end face of the right valve body (21), a priority valve (6) is arranged between the right valve body bypass oil duct (20) and a valve rod oil duct of the bucket connecting valve (7), and two signal ends of the priority valve (6) are respectively connected with a pilot oil duct 4pc3 and a pilot oil duct dr 7.
2. The main control valve for achieving flow distribution of an excavator bucket of claim 1, wherein: be equipped with left valve body central oil duct (12) in left valve body (18), install left valve body central bypass valve (11) and bucket rod one on the outer terminal surface of left valve body (18) and link up valve (13), left valve body central bypass valve (11) and bucket rod one link up valve (13) through left valve body central oil duct (12) intercommunication, communicate through scraper bowl confluence oil duct (10) between left valve body (18) and right valve body (21), left end and left valve body central oil duct (12) between left valve body central bypass valve (11) and the bucket rod one link up valve (13) intercommunication of scraper bowl confluence oil duct (10), the right-hand member is connected on the oil duct between priority valve (6) and scraper bowl link up valve (7).
3. The main control valve for achieving flow distribution of an excavator bucket of claim 2, wherein: and a bucket confluence check valve (9) is arranged on the bucket confluence oil passage (10).
4. The main control valve for achieving flow distribution of a bucket of an excavator according to claim 2 or 3, wherein: and an oil return flow control valve (5) is arranged on the right oil passage B1 of the bucket linkage valve (7), and two signal ends of the oil return flow control valve (5) are respectively connected with the left oil passage A1 and the pilot oil passage dr9 of the bucket linkage valve (7).
5. The main control valve for achieving flow distribution of an excavator bucket as claimed in claim 4, wherein: still be equipped with right valve body central oil duct (2) in right valve body (21), still install sharp walking allies oneself with valve (1), right walking allies oneself with valve (3), swing arm one and allies oneself with valve (4) and bucket rod bigeminy valve (8) on the outer terminal surface of right valve body (21), right valve body central oil duct (2) communicate sharp walking allies oneself with valve (1), right walking allies oneself with valve (3), swing arm one and allies oneself with valve (4), scraper bowl allies oneself with valve (7) and bucket rod bigeminy valve (8) in proper order.
6. The main control valve for achieving flow distribution to an excavator bucket of claim 5, wherein: the multifunctional connecting valve (14), the movable arm connecting valve (15), the rotary connecting valve (16) and the left walking connecting valve (17) are further mounted on the outer end face of the left valve body (18), and the left valve body central oil duct (12) is sequentially communicated with the left walking connecting valve (17), the rotary connecting valve (16), the movable arm connecting valve (15), the multifunctional connecting valve (14), the bucket rod connecting valve (13) and the left valve body central bypass valve (11).
7. The main control valve for achieving flow distribution to an excavator bucket of claim 6, wherein: the right valve body central oil duct (2) in front of the oil inlet duct of the straight-line walking connecting valve (1) is communicated with the right valve body bypass oil duct (20).
8. The main control valve for achieving flow distribution of an excavator bucket as claimed in claim 4, wherein: the oil return flow control valve (5) is a two-position two-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911420055.7A CN111058509A (en) | 2019-12-31 | 2019-12-31 | Main control valve for realizing flow distribution of excavator bucket |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911420055.7A CN111058509A (en) | 2019-12-31 | 2019-12-31 | Main control valve for realizing flow distribution of excavator bucket |
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| Publication Number | Publication Date |
|---|---|
| CN111058509A true CN111058509A (en) | 2020-04-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911420055.7A Pending CN111058509A (en) | 2019-12-31 | 2019-12-31 | Main control valve for realizing flow distribution of excavator bucket |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5813312A (en) * | 1995-05-24 | 1998-09-29 | Kabushiki Kaisha Kobe Seiko Sho | Hydraulic control apparatus |
| JP2002004339A (en) * | 2000-06-22 | 2002-01-09 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Control circuit for hydraulic backhoe |
| CN103628518A (en) * | 2013-08-12 | 2014-03-12 | 上海三一重机有限公司 | Composite action priority control system and method and excavator |
| 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 |
| CN110159609A (en) * | 2019-05-24 | 2019-08-23 | 山东临工工程机械有限公司 | Main control valve and hydraulic system |
| CN209414291U (en) * | 2018-12-11 | 2019-09-20 | 烟台艾迪液压科技有限公司 | A kind of novel whole multi-way valve of excavator |
| CN212104309U (en) * | 2019-12-31 | 2020-12-08 | 山东临工工程机械有限公司 | Main control valve for realizing flow distribution of excavator bucket |
-
2019
- 2019-12-31 CN CN201911420055.7A patent/CN111058509A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5813312A (en) * | 1995-05-24 | 1998-09-29 | Kabushiki Kaisha Kobe Seiko Sho | Hydraulic control apparatus |
| JP2002004339A (en) * | 2000-06-22 | 2002-01-09 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Control circuit for hydraulic backhoe |
| CN103628518A (en) * | 2013-08-12 | 2014-03-12 | 上海三一重机有限公司 | Composite action priority control system and method and excavator |
| 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 |
| CN209414291U (en) * | 2018-12-11 | 2019-09-20 | 烟台艾迪液压科技有限公司 | A kind of novel whole multi-way valve of excavator |
| CN110159609A (en) * | 2019-05-24 | 2019-08-23 | 山东临工工程机械有限公司 | Main control valve and hydraulic system |
| CN212104309U (en) * | 2019-12-31 | 2020-12-08 | 山东临工工程机械有限公司 | Main control valve for realizing flow distribution of excavator bucket |
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