CN202519716U - Excavator scarper pan hydraulic system with confluence accelerating function - Google Patents
Excavator scarper pan hydraulic system with confluence accelerating function Download PDFInfo
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- CN202519716U CN202519716U CN2011205700153U CN201120570015U CN202519716U CN 202519716 U CN202519716 U CN 202519716U CN 2011205700153 U CN2011205700153 U CN 2011205700153U CN 201120570015 U CN201120570015 U CN 201120570015U CN 202519716 U CN202519716 U CN 202519716U
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- shuttle valve
- interflow
- communicated
- pressure sensor
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Abstract
The utility model discloses an excavator scarper pan hydraulic system with a confluence accelerating function, wherein the output end of a hydraulic pump aggregate is communicated with the front and rear cavities of a scraper pan cylinder through a main valve, the hydraulic pump aggregate controls the Pi2 end of an oil circuit to be communicated with a shuttle valve group, and the shuttle valve group is communicated with a pilot control valve and a two-phase three-way hydraulic reversing valve; and one end of each of first and second pressure sensors is communicated with a central controller, the control oil circuit of the two-phase three-way hydraulic reversing valve is communicated with the central controller through a pressure switch, the control oil circuit of the shuttle valve group is communicated with the P end of a confluence valve, the A end of the confluence valve is communicated with the first end of a confluence shuttle valve, the second end of the confluence shuttle valve is communicated with the other end of the first pressure sensor, and the third end of the confluence shuttle valve is communicated with the shuttle valve group. The independent action of the scraper pan realizes the double pump confluence, so as to accelerate the operation of the scraper pan; the single pump supplies oil to the scraper pan cylinder in case of compound action; and the flow rate variation of the double pump is controlled, so that the whole machine performance is further improved.
Description
Technical field
The utility model relates to a kind of hydraulic system of digger operating device, and the particularly a kind of power shovel hydraulic system that can work fast belongs to technical field of engineering machinery.
Background technology
Excavator is to excavate or carrying is higher or lower than the earth or the material of bearing surface with scraper bowl, the haulage vehicle or unload the earth moving plant to rickyard of packing into.Existing power shovel oil cylinder has only single oil pump feed, and scraper bowl speed is slow partially, the complete machine inefficiency.Along with people's is to the improve of excavator functional requirement; A kind of hydraulic system that can improve the power shovel operating rate of necessary proposition; When excavator is not used for realizing scraper bowl interflow function outside the valve because of increasing of other functions has enough spools; Must utilize other modes to realize the interflow, the output flow of two hydraulic pumps in the hydraulic system and Cheng Yilu outputed to bucket cylinder drive the scraper bowl digging operation.Change into the double pump fuel feeding from single oil pump feed state,, increase fuel delivery, promote the purpose of the scraper bowl speed of service, make operating efficiency, reduced energy loss, optimized excavator complete machine performance simultaneously thereby improved to reach the double pump interflow.And when excavator carries out straight line moving action other equipments actions such as scraper bowl are arranged simultaneously, must accomplish that also an oil pump feed is to the corresponding work device in two hydraulic pumps, another oil pump feed is to equipments such as scraper bowls.
The utility model content
The purpose of the utility model provides a kind of hydraulic system that can accelerate power shovel speed, during the scraper bowl single movement, can carry out the double pump fuel feeding and use to bucket cylinder; When any composite move or excavator straight line moving were arranged, single oil pump feed used to bucket cylinder.
The utility model is achieved through following technical scheme.
A kind of power shovel hydraulic system with interflow acceleration function; Comprise by the hydraulic pump group of front pump with back parallel connection of pumps combination; Central controller; Pilot-actuated valve; The shuttle valve group of several shuttle valve combinations; Pressure switch; First pressure sensor; Second pressure sensor; The 3rd pressure sensor; Many valves connect the main valve of combination; Two-bit triplet hydraulicchange-over valve with walking logic function; The interflow valve; The interflow shuttle valve; Bucket cylinder, said main valve comprise three six logical hydraulicchange-over valves of control bucket cylinder commutation; Two four-way hydraulicchange-over valves of control straight line moving; Hydraulic pump group output leads to the chamber, front and back of bucket cylinder by two four-way hydraulicchange-over valves respectively through three six logical hydraulicchange-over valves; The second pressure hydraulic fluid port (Pi2 end) of hydraulic pump group control oil circuit communicates with the shuttle valve group; The shuttle valve group communicates with pilot-actuated valve, also communicates with the two-bit triplet hydraulicchange-over valve; First pressure sensor, one end, second pressure sensor, one end lead to central controller respectively; The second pressure hydraulic fluid port (Pi2 end) of the logical hydraulic pump group control of second pressure sensor other end oil circuit, the control oil circuit of two four-way hydraulicchange-over valves leads to central controller by the 3rd pressure sensor; The control oil circuit of said shuttle valve group communicates with the first pressure hydraulic fluid port (P end) of interflow valve; The oil-out (A end) of interflow valve is communicated with interflow shuttle valve first end; Interflow shuttle valve second end communicates with the first pressure sensor other end; Interflow shuttle valve the 3rd end leads to the shuttle valve group, and communicates with the second pressure hydraulic fluid port (Pi1 end) of interflow valve.
The utility model compact conformation, integrated degree is high, when carrying out scraper bowl single movement (excavating or discharging), realizes the double pump interflow, has promoted the scraper bowl speed of service; When any composite move, single oil pump feed is given bucket cylinder, makes composite move coordinate thereby reduce scraper bowl speed; When the excavator straight line moving, still keep single oil pump feed to give bucket cylinder, do not influence the straight line moving function.The utility model can be according to the operation needs, the operating rate of adjustment scraper bowl, and when other actions were carried out, the double pump changes in flow rate was by central controller controls, thereby regulated system's stationarity, and the complete machine performance is further improved.During scraper bowl interflow double pump fuel feeding, but its fuel delivery is state of a control, thereby speed and output flow when regulating the scraper bowl interflow have reduced the reduction energy loss of excavator hydraulic system effectively.
Advantage of the utility model and characteristics will illustrate through the non-limitative illustration of following preferred embodiment and explain that these embodiment only provide with reference to accompanying drawing as an example.
Description of drawings
Fig. 1 is the hydraulic schematic diagram of the power shovel of the utility model.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
Present embodiment is as shown in Figure 1; Comprise by the shuttle valve group 4 of the hydraulic pump groups 1 of front pump 11 and back pump 12 parallel connection combination, central controller 2, pilot-actuated valve 3, several shuttle valves combinations, pressure switch 5, first pressure sensor 6, second pressure sensor 7, the 3rd pressure sensor 8, many valves being connected the main valve 9 of combination, two-bit triplet hydraulicchange-over valve 10, interflow valve 101, interflow shuttle valve 102, bucket cylinder 103 with walking logic function, main valve 9 comprise the switching-over of control bucket cylinder three six logical hydraulicchange-over valves 91, control two four-way hydraulicchange-over valves 92 of straight line moving.Front pump 11 outputs lead to the chamber, front and back of bucket cylinder 103 through two four-way hydraulicchange-over valves 92 respectively through three six logical hydraulicchange-over valves 91; The Pi2 end of hydraulic pump group 1 control oil channel communicates with shuttle valve group 4; Shuttle valve group 4 communicates with pilot-actuated valve 3, also communicates with two-bit triplet hydraulicchange-over valve 10.First pressure sensor, 6 one ends, second pressure sensor, 7 one ends lead to central controller 2 respectively; The Pi2 end of logical hydraulic pump group 1 control oil channel of second pressure sensor, 7 other ends, the control oil channel of two four-way hydraulicchange-over valves 92 is led to central controller 2 through the 3rd pressure sensor 8.The control oil channel of shuttle valve group 4 communicates with the P end of interflow valve 101; The A end of interflow valve 101 is communicated with interflow shuttle valve first end 1021; Interflow shuttle valve second end 1022 communicates with first pressure sensor, 6 other ends, and interflow shuttle valve the 3rd end 1023 leads to shuttle valve group 4, and communicates with the Pi1 end of interflow valve 101.
Power shovel excavates or during the discharging single movement; Guide oil passes to main valve 1 through shuttle valve group 4 three six logical hydraulicchange-over valves 91 are supplied with in pilot-actuated valve 3 actions; Make three six logical hydraulicchange-over valves 91 switching-overs, meanwhile, shuttle valve group 4 is supplied with the guide oils interflow valve 101 of flowing through and is made 10 switching-overs of two-bit triplet hydraulicchange-over valve; And open interflow shuttle valve 102, the guide oil that is flowed out by two-bit triplet hydraulicchange-over valve 10 makes 92 switching-overs of two four-way hydraulicchange-over valves.The pressure signal that is flowed out by interflow shuttle valve second end 1022 feeds back to hydraulic pump group 1; Thereby make hydraulic pump group 1 obtain the double pump fuel supply signal; Beginning double pump fuel feeding; At this moment, the front pump 11 of hydraulic pump group 1 uses with three the six logical hydraulicchange-over valves 91 that the pressure oil of back pump 12 outputs output could be supplied with in the main valve 9 simultaneously, forms the interflow mode of double pump single spool fuel feeding.
When carrying out the scraper bowl composite move; Be that swing arm, dipper and the slewing equipment of excavator is when moving simultaneously; Wherein any one action is worked simultaneously with scraper bowl and all will be cut off interflow valve 101 by the guide oil that shuttle valve group 4 is drawn; It is no longer worked, and hydraulic pump group 1 single oil pump feed is given bucket cylinder 103, has guaranteed the system acting coordination.
Because the front pump 11 of hydraulic pump group 1 and back pump 12 double pumps while fuel feeding; Three six logical hydraulicchange-over valve 91 single spool interflow; Make the front pump 11 and the double pump flow of back pump 12 lead to hydraulicchange-over valve 91 spools through three six simultaneously; Flow is crossed conference makes energy loss increase, and therefore aspect flow-control, that has utilized first pressure sensor 6, second pressure sensor 7, the 3rd pressure sensor 8 and pressure switch 5 carries out signal of telecommunication control to hydraulic system; The size that the size of the pressure signal through feeding back to central controller 2 is regulated output current; Further the output flow of control hydraulic pump group 1 can reduce energy loss effectively, and can adjust suitable scraper bowl operating rate within the specific limits.When other actions were carried out, the changes in flow rate of hydraulic pump group 1 can be controlled by central controller 2, thereby the stationarity of having regulated excavator system is further improved the complete machine performance.
Except that the foregoing description, the utility model can also have other embodiments, and all employings are equal to the technical scheme of replacement or equivalent transformation formation, all drop in the protection domain of the utility model requirement.
Claims (1)
1. one kind has the power shovel hydraulic system that function is quickened at the interflow; Comprise two-bit triplet hydraulicchange-over valve, bucket cylinder that shuttle valve group, pressure switch, first pressure sensor, second pressure sensor, many valves by the hydraulic pump group of front pump and back parallel connection of pumps combination, central controller, pilot-actuated valve, several shuttle valves combinations are connected the main valve of combination, have the walking logic function, said main valve comprise the switching-over of control bucket cylinder three six logical hydraulicchange-over valves, control two four-way hydraulicchange-over valves of straight line moving; Hydraulic pump group output leads to the chamber, front and back of bucket cylinder through two four-way hydraulicchange-over valves respectively through three six logical hydraulicchange-over valves; The second pressure hydraulic fluid port of hydraulic pump group control oil channel communicates with the shuttle valve group; The shuttle valve group communicates with pilot-actuated valve, also communicates with the two-bit triplet hydraulicchange-over valve; First pressure sensor, one end, second pressure sensor, one end lead to central controller respectively; The second pressure hydraulic fluid port of the logical hydraulic pump group control oil channel of the second pressure sensor other end, the control oil channel of two four-way hydraulicchange-over valves is led to central controller through the 3rd pressure sensor; It is characterized in that: also comprise interflow valve, interflow shuttle valve, the 3rd pressure sensor; The control oil channel of said shuttle valve group communicates with the first pressure hydraulic fluid port of interflow valve; The oil-out of interflow valve is communicated with interflow shuttle valve first end; Interflow shuttle valve second end communicates with the first pressure sensor other end, and interflow shuttle valve the 3rd end leads to the shuttle valve group, and communicates with the second pressure hydraulic fluid port of interflow valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205700153U CN202519716U (en) | 2011-12-31 | 2011-12-31 | Excavator scarper pan hydraulic system with confluence accelerating function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205700153U CN202519716U (en) | 2011-12-31 | 2011-12-31 | Excavator scarper pan hydraulic system with confluence accelerating function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202519716U true CN202519716U (en) | 2012-11-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205700153U Expired - Fee Related CN202519716U (en) | 2011-12-31 | 2011-12-31 | Excavator scarper pan hydraulic system with confluence accelerating function |
Country Status (1)
| Country | Link |
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| CN (1) | CN202519716U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518171A (en) * | 2011-12-31 | 2012-06-27 | 中外合资沃得重工（中国）有限公司 | Converging and accelerating hydraulic system for bucket of excavating machine |
| CN104612195A (en) * | 2014-12-31 | 2015-05-13 | 青岛雷沃挖掘机有限公司 | Flow-combining energy-saving hydraulic control structure and method for descending of excavator boom |
| CN104674867A (en) * | 2014-12-31 | 2015-06-03 | 青岛雷沃挖掘机有限公司 | Hydraulic control system and hydraulic control method for action of bucket rod of excavator |
| CN108699801A (en) * | 2016-07-06 | 2018-10-23 | 日立建机株式会社 | Work machine |
-
2011
- 2011-12-31 CN CN2011205700153U patent/CN202519716U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102518171A (en) * | 2011-12-31 | 2012-06-27 | 中外合资沃得重工（中国）有限公司 | Converging and accelerating hydraulic system for bucket of excavating machine |
| CN102518171B (en) * | 2011-12-31 | 2014-08-13 | 中外合资沃得重工（中国）有限公司 | Converging and accelerating hydraulic system for bucket of excavating machine |
| CN104612195A (en) * | 2014-12-31 | 2015-05-13 | 青岛雷沃挖掘机有限公司 | Flow-combining energy-saving hydraulic control structure and method for descending of excavator boom |
| CN104674867A (en) * | 2014-12-31 | 2015-06-03 | 青岛雷沃挖掘机有限公司 | Hydraulic control system and hydraulic control method for action of bucket rod of excavator |
| CN108699801A (en) * | 2016-07-06 | 2018-10-23 | 日立建机株式会社 | Work machine |
| CN108699801B (en) * | 2016-07-06 | 2020-11-10 | 日立建机株式会社 | Working machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20151231 |
|
| EXPY | Termination of patent right or utility model |