CN102021927A - Rotary oil supply loop for hydraulic excavator - Google Patents
Rotary oil supply loop for hydraulic excavator Download PDFInfo
- Publication number
- CN102021927A CN102021927A CN 201010537297 CN201010537297A CN102021927A CN 102021927 A CN102021927 A CN 102021927A CN 201010537297 CN201010537297 CN 201010537297 CN 201010537297 A CN201010537297 A CN 201010537297A CN 102021927 A CN102021927 A CN 102021927A
- Authority
- CN
- China
- Prior art keywords
- valve
- control
- loop
- control device
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002828 fuel tank Substances 0.000 claims description 18
- 230000008676 import Effects 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000003921 oil Substances 0.000 description 11
- 239000010720 hydraulic oil Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 206010020852 Hypertonia Diseases 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Images
Landscapes
- Operation Control Of Excavators (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a rotary oil supply loop for a hydraulic excavator, which comprises an oil supply loop connected with the two ends of a rotary motor, and a back pressure loop arranged between the oil supply loop and the oil tank, wherein the back pressure loop comprises first and second check valves which are connected in parallel; and the pressure of the second check valve is lower than that of the first check valve. The rotary oil supply loop is characterized in that: the two ends of the second check valve are connected with a control loop in parallel; the control loop is formed by connecting a control device and a switch valve; the control end of the control device is connected with the signal transmitting end of a rotary handle; and the output end of the control device is connected with the switch valve. In the invention, the arrangement of the control loop in the back pressure loop reduces the hydraulic return oil pressure when the excavator does not rotate and realizes throttle control for supplying oil in time when the excavator stops rotating; therefore, energy consumption is reduced effectively, heat is reduced, and the working efficiency of the whole machine is improved.
Description
Technical field
The present invention relates to a kind of hydraulic circuit of hydraulic crawler excavator, relate in particular to a kind of revolution feed circuit system that is used for hydraulic crawler excavator.
Background technology
The hydraulic system of the hydraulic crawler excavator of existing main flow, hydraulic oil flows to main control valve by main pump after the sucking-off from fuel tank, the control valve spool moves to distribute hydraulic oil flow to each executive component (as hydraulic motor and hydraulic jack), realize the various operation actions of complete machine, the spool of control valve is driven by guide's hydraulic system, and hydraulic oil flows back to hydraulic oil container at last through behind the executive component.
Digging machine is got on the bus and is realized the slewing equipment of rotation, adopts the hydraulic gyration motor to drive mostly.Return line in the Hydraulic slewing system is equipped with counterbalance valve before flowing back to fuel tank, the repairing of the pressure of counterbalance valve hydraulic motor when realizing that revolution stops to be avoided producing emptying phenomenon and rotary motor is caused damage.Described counterbalance valve is to realize action by the elastic force of built-in spring: when system pressure than setting pressure hour, diaphragm is blocking pipeline under the effect of spring force; When system pressure is bigger than setting pressure, diaphragm compression spring, pipeline is connected, and liquid passes through counterbalance valve.As shown in Figure 1, hydraulic principle sketch for the control slewing equipment: motor 17 drives main pump 18, output principal pressure oil is to valve core of main valve 19, spool 19 is subjected to the control of rotary handle guide oil circuit 20, flow out principal pressure oil to hydraulic motor 21, hydraulic motor 21 two ends are connected to rotary motor feed circuit 22, and the hydraulic oil that flows out from working connection flows into fuel tank through one way valve 23 and strainer 24, flows into fuel tank through one way valve 25 when the filter core hypertonia.In guide's control oil channel, when rotary handle was struck, pioneer pump 26 output guide hydraulic oil flowed to spool through shuttle valve 27, moving of control valve core of main valve 19, and then control flows into the principal pressure oil of hydraulic motor 21, and motor drives the pivoting support rotation, realizes the excavator rotation of getting on the bus.The setting pressure of one way valve 23 is higher than one way valve 25, and during operate as normal, system's minimum pressure remains on the force value of one way valve 25, and the feed circuit when guaranteeing that rotary motor stops can operate as normal.
As mentioned above, existing counterbalance valve uniaxial pressure is traditionally arranged to be 0.2-0.5MPa by system's principal pressure requirement, system at work, all hydraulic oil that flow back to fuel tank all will pass through this one way valve, pressure differential herein, cause the pressure loss of hydraulic system, and increased the heat of hydraulic oil, reduced the operating efficiency and the application life of complete machine.
Summary of the invention
The object of the invention provides a kind of revolution feed circuit system that is used for hydraulic crawler excavator, uses this system, can not effectively reduce energy consumption when having revolution, reduces the generation of heat in the loop, improves the operating efficiency of complete machine, increases the service life.
For achieving the above object, the technical solution used in the present invention is: a kind of revolution feed circuit system that is used for hydraulic crawler excavator, comprise the feed circuit that is connected in the rotary motor two ends and be installed on feed circuit and fuel tank between backpressure circuit, described backpressure circuit comprises first, the one way valve of the second two parallel connections, the pressure of described second one way valve is less than first one way valve, the described second one way valve two ends also connect a control loop, described control loop is connected and composed by control device and switch valve, the control end of described control device is connected with the rotary handle signal sending end, and its output is connected with described switch valve.
In the technique scheme, prior art is adopted in feed circuit, constitute by one way valve and overflow valve, be connected in the left and right sides of rotary motor, described backpressure circuit is connected between feed circuit and the fuel tank, the repairing of rotary motor when realizing that with the pressure of counterbalance valve revolution stops, avoid producing emptying phenomenon and rotary motor is caused damage, in the present invention, backpressure circuit has also comprised a control loop, is connected to the second one way valve two ends in original loop, its control mode is: usually under the working condition, counterbalance valve pressure is made as the zero pressure state, reduces return pressure, realize energy-conservation; And in order to protect rotary motor; control device detects the handle signal in real time; detecting handle sends when turning round signal (promptly getting back to meta from the revolution position); the control device switching valve is to the back pressure state; repairing function when guaranteeing that rotary motor stops is normally moved; the hydraulic oil-returning pressure in the time of thereby nothing can being turned round reduces, and effectively reduces energy consumption.
In the technique scheme, when rotary handle is hydraulic handle, described control device is connected and composed by a two-position three-way valve and an one-way throttle valve, the control end of described two-position three-way valve is connected with the shuttle valve of rotary handle signal sending end, its import is connected with the excavator pioneer pump, first outlet is connected with described one-way throttle valve, and second outlet is connected with fuel tank, and the other end of described one-way throttle valve is connected with described switch valve.
Another kind of technical scheme is, when rotary handle is electric control handle, described control device is connected and composed by a controller, a signal shift switch and a delayer, described controller input is connected with revolution electric control handle signal sending end, output is connected with described signal shift switch, one contact of described signal shift switch is connected the back and is connected with described switch valve with described delayer, another contact of signal shift switch directly is connected with described switch valve.
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
1. the present invention is by setting up control loop in backpressure circuit, switching by control device gauge tap valve, make the hydraulic oil-returning pressure of excavator when not having revolution directly pass through to flow into fuel tank by closed switch valve, counterbalance valve pressure is the zero pressure state, effectively cuts down the consumption of energy; And when revolution stopped, counterbalance valve was reinstated, and throttling postpones to control the safe handling that the timely repairing that realizes has guaranteed rotary motor;
2. the present invention is according to the type of rotary handle, and control device adopts different structures corresponding with it, all realizes the handoff functionality to switch valve, and the scope of application is more extensive;
3. because the reduction of the energy consumption when not having revolution in the fluid pressure line has also just reduced the generation of heat in the loop, more help the normal operation and the application life of whole hydraulic system, the operating efficiency that improves complete machine is also arranged simultaneously.
Description of drawings
Fig. 1 is the hydraulic circuit rough schematic view in the background technology of the present invention;
Fig. 2 is the hydraulic circuit rough schematic view of the embodiment of the invention one;
Fig. 3 is the rough schematic view of control loop in the embodiment of the invention two.
Wherein: 1, rotary motor; 2, feed circuit; 3, fuel tank; 4, first one way valve; 5, second one way valve; 6, control device; 7, switch valve; 8, rotary handle; 9, two-position three-way valve; 10, one-way throttle valve; 11, pioneer pump; 12, shuttle valve; 13, controller; 14, signal shift switch; 15, delayer; 16, revolution electric control handle; 17, motor; 18, main pump; 19, valve core of main valve; 20, rotary handle guide oil circuit; 21, hydraulic motor; 22, feed circuit; 23, one way valve; 24, strainer; 25, one way valve; 26, pioneer pump 27, shuttle valve.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment one: referring to shown in Figure 2, a kind of revolution feed circuit system that is used for hydraulic crawler excavator, comprise the feed circuit 2 that is connected in rotary motor 1 two ends and be installed on feed circuit 2 and fuel tank 3 between backpressure circuit, described backpressure circuit comprises first, the one way valve of the second two parallel connections, the pressure of described second one way valve 5 is less than first one way valve 4, described second one way valve, 5 two ends also connect a control loop, described control loop is connected and composed by control device 6 and switch valve 7, the control end of described control device 6 is connected with the rotary handle signal sending end, and its output is connected with described switch valve 7.
In the present embodiment, rotary handle 8 is the hydraulic control handle, described control device 6 is connected and composed by a two-position three-way valve 9 and an one-way throttle valve 10, the control end of described two-position three-way valve is connected with the shuttle valve 12 of rotary handle signal sending end, its import is connected with excavator pioneer pump 11, first outlet is connected with described one-way throttle valve 10, and second outlet is connected with fuel tank 11, and the other end of described one-way throttle valve 10 is connected with described switch valve 7.When rotary handle 8 was not worked, switch valve 7 was in closure state, and the principal pressure oil that flows back to fuel tank 11 from feed circuit 2 flows into fuel tank 11 through switch valve 7, even counterbalance valve pressure is the zero pressure state; When rotary handle 8 work, shuttle valve 12 place's pressure oils flow to two-position three-way valve 9 spools, then the guide controls oil through one-way throttle valve 10, make switch valve 7 be in open mode, principal pressure oil diverted via second one way valve 5 and flows into fuel tank, after rotary handle 8 is got back to meta, because the existence of one-way throttle valve 10, the pressure oil that flows to hydraulic oil container 11 can not flow into fuel tank 11 through switch valve 7 immediately, carry out the setting of one-way throttle valve 10 by actual machine test, guarantee that the retarded closing of switch valve 7 satisfies the requirement of rotary motor 1 feed circuit 2.
Embodiment two: referring to shown in Figure 3, in the present embodiment, its structure and embodiment one are similar, difference is: for being applicable to revolution electric control handle 16 signals, adopt the control device 6 in the present embodiment, described control device 6 is by a controller 13, one signal shift switch 14 and a delayer 15 connect and compose, described controller 13 inputs are connected with revolution electric control handle 16 signal sending ends, output is connected with described signal shift switch 14, one contact of described signal shift switch 14 is connected the back and is connected with described switch valve 7 with described delayer 15, another contact of signal shift switch 14 directly is connected with described switch valve 7.Its course of work is: the voltage signal of revolution electric control handle 16 is sent to controller 13, when controller 13 is judged non-rotating signal, attonity, then switch valve 7 keeps connected state, when detecting the revolution signal, contact with the contact of below immediately, switch valve 7 is switched to off-state, start back pressure pressure, when detecting the revolution signal and become 0, then signal shift switch 14 contacts with the contact of top, time-delay by delayer 15, controller 13 disconnects the signal that sends after guaranteeing feed circuit 2 end-of-jobs, switch valve 7 is back to connected state.
Claims (3)
1. revolution feed circuit system that is used for hydraulic crawler excavator, comprise the feed circuit that is connected in the rotary motor two ends and be installed on feed circuit and fuel tank between backpressure circuit, described backpressure circuit comprises the one way valve of first, second two parallel connections, the pressure of described second one way valve is less than first one way valve, it is characterized in that: the described second one way valve two ends also connect a control loop, described control loop is connected and composed by control device and switch valve, the control end of described control device is connected with the rotary handle signal sending end, and its output is connected with described switch valve.
2. the revolution feed circuit system that is used for hydraulic crawler excavator according to claim 1, it is characterized in that: described control device is connected and composed by a two-position three-way valve and an one-way throttle valve, the control end of described two-position three-way valve is connected with the shuttle valve of rotary handle signal sending end, its import is connected with the excavator pioneer pump, first outlet is connected with described one-way throttle valve, second outlet is connected with fuel tank, and the other end of described one-way throttle valve is connected with described switch valve.
3. the revolution feed circuit system that is used for hydraulic crawler excavator according to claim 1, it is characterized in that: described control device is connected and composed by a controller, a signal shift switch and a delayer, described controller input is connected with revolution electric control handle signal sending end, output is connected with described signal shift switch, one contact of described signal shift switch is connected the back and is connected with described switch valve with described delayer, another contact of signal shift switch directly is connected with described switch valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010537297 CN102021927A (en) | 2010-11-10 | 2010-11-10 | Rotary oil supply loop for hydraulic excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010537297 CN102021927A (en) | 2010-11-10 | 2010-11-10 | Rotary oil supply loop for hydraulic excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102021927A true CN102021927A (en) | 2011-04-20 |
Family
ID=43863667
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010537297 Pending CN102021927A (en) | 2010-11-10 | 2010-11-10 | Rotary oil supply loop for hydraulic excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102021927A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102535575A (en) * | 2012-02-03 | 2012-07-04 | 山重建机(济宁)有限公司 | Hydraulic control energy-saving device of crawler-type hydraulic digging machine |
| CN102900122A (en) * | 2012-11-09 | 2013-01-30 | 中外合资沃得重工（中国）有限公司 | Rotary hydraulic system of excavator and control method |
| CN102912823A (en) * | 2012-11-09 | 2013-02-06 | 浙江大学 | Rotary energy saving system of excavator |
| CN103244496A (en) * | 2013-05-13 | 2013-08-14 | 三一汽车起重机械有限公司 | Rotary control valve unit, rotary control hydraulic system and crane |
| CN103470557A (en) * | 2013-09-05 | 2013-12-25 | 南京工业大学 | Hydraulic rotary braking energy-saving control system |
| CN104246086A (en) * | 2012-01-04 | 2014-12-24 | 派克汉尼芬公司 | Hydraulic hybrid swing drive system for excavators |
| CN107587547A (en) * | 2017-09-07 | 2018-01-16 | 徐州徐工挖掘机械有限公司 | A kind of hydraulic crawler excavator rotary braking system |
| CN111994811A (en) * | 2020-08-03 | 2020-11-27 | 中国铁建重工集团股份有限公司 | Hydraulic control system and engineering vehicle |
| CN112922073A (en) * | 2021-04-01 | 2021-06-08 | 山东临工工程机械有限公司 | Oil supplementing system of rotary motor and excavator |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2072546U (en) * | 1990-07-10 | 1991-03-06 | 李建启 | Hydraulic shovel slewing system with reclaiming brake energy |
| JPH11336133A (en) * | 1998-05-29 | 1999-12-07 | Sumitomo Constr Mach Co Ltd | Cavitation preventing device for hydraulic circuit of revolving system in construction machine |
| JP2002115273A (en) * | 2000-10-10 | 2002-04-19 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Slewing controller for construction machinery |
| CN201301466Y (en) * | 2008-11-13 | 2009-09-02 | 贵州詹阳动力重工有限公司 | Rotary oil supply loop for hydraulic excavator |
| CN101798830A (en) * | 2010-02-25 | 2010-08-11 | 三一重机有限公司 | Back pressure control method of hydraulic digging machine |
-
2010
- 2010-11-10 CN CN 201010537297 patent/CN102021927A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2072546U (en) * | 1990-07-10 | 1991-03-06 | 李建启 | Hydraulic shovel slewing system with reclaiming brake energy |
| JPH11336133A (en) * | 1998-05-29 | 1999-12-07 | Sumitomo Constr Mach Co Ltd | Cavitation preventing device for hydraulic circuit of revolving system in construction machine |
| JP2002115273A (en) * | 2000-10-10 | 2002-04-19 | Sumitomo (Shi) Construction Machinery Manufacturing Co Ltd | Slewing controller for construction machinery |
| CN201301466Y (en) * | 2008-11-13 | 2009-09-02 | 贵州詹阳动力重工有限公司 | Rotary oil supply loop for hydraulic excavator |
| CN101798830A (en) * | 2010-02-25 | 2010-08-11 | 三一重机有限公司 | Back pressure control method of hydraulic digging machine |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104246086A (en) * | 2012-01-04 | 2014-12-24 | 派克汉尼芬公司 | Hydraulic hybrid swing drive system for excavators |
| CN104246086B (en) * | 2012-01-04 | 2016-08-03 | 派克汉尼芬公司 | The hydraulic hybrid gyroscopic drive system of excavator |
| CN102535575A (en) * | 2012-02-03 | 2012-07-04 | 山重建机(济宁)有限公司 | Hydraulic control energy-saving device of crawler-type hydraulic digging machine |
| CN102900122A (en) * | 2012-11-09 | 2013-01-30 | 中外合资沃得重工（中国）有限公司 | Rotary hydraulic system of excavator and control method |
| CN102912823A (en) * | 2012-11-09 | 2013-02-06 | 浙江大学 | Rotary energy saving system of excavator |
| CN102912823B (en) * | 2012-11-09 | 2014-10-29 | 浙江大学 | Rotary energy saving system of excavator |
| CN103244496A (en) * | 2013-05-13 | 2013-08-14 | 三一汽车起重机械有限公司 | Rotary control valve unit, rotary control hydraulic system and crane |
| CN103470557B (en) * | 2013-09-05 | 2015-09-16 | 南京工业大学 | Hydraulic rotary braking energy-saving control system |
| CN103470557A (en) * | 2013-09-05 | 2013-12-25 | 南京工业大学 | Hydraulic rotary braking energy-saving control system |
| CN107587547A (en) * | 2017-09-07 | 2018-01-16 | 徐州徐工挖掘机械有限公司 | A kind of hydraulic crawler excavator rotary braking system |
| CN107587547B (en) * | 2017-09-07 | 2019-07-12 | 徐州徐工挖掘机械有限公司 | A kind of hydraulic crawler excavator rotary braking system |
| CN111994811A (en) * | 2020-08-03 | 2020-11-27 | 中国铁建重工集团股份有限公司 | Hydraulic control system and engineering vehicle |
| CN112922073A (en) * | 2021-04-01 | 2021-06-08 | 山东临工工程机械有限公司 | Oil supplementing system of rotary motor and excavator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102021927A (en) | Rotary oil supply loop for hydraulic excavator | |
| KR101652112B1 (en) | Hybrid Excavator Boom Actuator System and its Control Method | |
| CN101736771B (en) | Hydraulic Excavator Rotary Deceleration Braking Energy Recovery System | |
| US9512596B2 (en) | Hybrid excavator boom actuating system and method for controlling same | |
| CN102011416B (en) | Hydraulic excavator flow rate control method and control loop | |
| CN102229328B (en) | Vehicle mechanical energy-saving hydraulic system with multi-pump confluence | |
| CN103459857B (en) | The fluid pressure drive device of Work machine | |
| EP2597211B1 (en) | Hydraulic excavator | |
| CN201649155U (en) | Hydraulic Excavator Rotary Deceleration Braking Energy Recovery System | |
| CN103620233B (en) | For the hydraulic control valve of construction plant | |
| CN105008729A (en) | Energy regeneration system for construction equipment | |
| CN103703258A (en) | Construction machine | |
| CN101941620A (en) | Reel hydraulic device with reel free quick-release floating control | |
| CN104564885B (en) | A kind of highly integrated Double-directional back rotary valve for pilot control pattern | |
| CN106088208B (en) | Excavator turns round hydraulic control system | |
| CN103422530B (en) | A kind of excavator hydraulic gyration energy conserving system | |
| CN102561450B (en) | Control structure and control method for switching electric control to hydraulic control for electric control master pump of excavator | |
| CN102400968A (en) | Hydraulic valve, hydraulic system and concrete pumping equipment | |
| CN104081065A (en) | Hydraulic pressure control device for swing motor for construction machinery | |
| CN204942135U (en) | The control gear of excavator hydraulic system | |
| CN204200723U (en) | Mine hoist hydraulic station modified node method | |
| CN202645426U (en) | Push-and-pull hydraulic system for horizontal directional drilling machine | |
| CN201884374U (en) | Wheeled crane and hydraulic oil radiating system thereof | |
| CN202082175U (en) | Hydraulic control system and concrete pumping system equipped with same | |
| CN107724455B (en) | Hydraulic circuit of engineering machine, engineering machine with hydraulic circuit and control method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110420 |