CN101974926A - Oil returning system capable of automatically controlling hydraulic oil temperature used for excavator - Google Patents
Oil returning system capable of automatically controlling hydraulic oil temperature used for excavator Download PDFInfo
- Publication number
- CN101974926A CN101974926A CN 201010296099 CN201010296099A CN101974926A CN 101974926 A CN101974926 A CN 101974926A CN 201010296099 CN201010296099 CN 201010296099 CN 201010296099 A CN201010296099 A CN 201010296099A CN 101974926 A CN101974926 A CN 101974926A
- Authority
- CN
- China
- Prior art keywords
- hydraulic oil
- valve
- temperature
- oil
- counterbalance valve
- 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
Images
Landscapes
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses an oil returning system capable of automatically controlling a hydraulic oil temperature used for an excavator. The system comprises a power source and an oil feed pump connected with the power source, wherein the outlet of the oil feed pump is respectively connected with a main control valve and a control oil pump; the outlet of the main control valve is connected with a radiator through a first back pressure valve; and the outlet of the radiator is connected with a hydraulic oil tank. The system is characterized in that: the outlet of the main control valve is also connected with a second back pressure valve; the second back pressure valve is a controllable back pressure valve; the outlet of the second back pressure valve is connected with the hydraulic oil tank; and the control oil port of the second back pressure valve is connected with a temperature control module. In the system, by connecting the second back pressure valve at the outlet of the main control valve and controlling the on-off state of the second back pressure valve by the temperature control module, the hydraulic oil reaches an ideal working temperature so as to ensure that the influence of the hydraulic oil caused by an environmental temperature is minimal.
Description
Technical field
The present invention relates to a kind of excavator hydraulic system, be specifically related to a kind of oil return system that is used for the automatic control hydraulic oil temperature of excavator.
Background technology
The main purpose of excavator is a digging material and transfer to the emptying point from the face of land, goes back to excavation site after the discharging again, repeats.At present the excavator that generally uses is a hydraulic crawler excavator, has construction maneuverability, advantage that efficient is high, thereby is widely used in occasions such as the foundation dredging of building construction and the cleaning after the completion, urban duct laying, construction of water conservancy works.Excavator generally is made up of several parts such as equipment, slewing equipment, running gear and hydraulic control systems, slewing equipment and running gear are the bodies of excavator, equipment is transferred on slewing equipment, slewing equipment is fixed on the underframe of running gear, wherein hydraulic control system is the important component part of excavator, for the exercises of excavator provide hydraulic oil.
The work region of excavator is more extensive at present, the weather conditions difference of each region, wherein especially with extremely cold area and torrid areas, and desert area waits the bigger region of the temperature difference round the clock, be subjected to the service condition of Temperature Influence hydraulic oil that very large difference is arranged in these areas, under the lower environment of temperature, require the viscosity of hydraulic oil lower, and under the higher environment of temperature, require the viscosity of hydraulic oil higher.In order to solve the influence of temperature to hydraulic oil, the hydraulic oil of the different viscosityes of general normal employing adapts to local environment temperature, though this method can effectively solve the viscosity requirement of condition of different temperatures to hydraulic oil, but also there is bigger deficiency, owing to change the hydraulic oil of different viscosityes according to varying environment temperature needs, cause cost higher, hydraulic oil is changed also comparatively trouble.
At above-mentioned deficiency, a kind of oil return system of controlling hydraulic oil temperature has appearred, comprise hydraulic oil container, power source, oil feed pump, main control valve, first counterbalance valve that is connected with main control valve respectively and second counterbalance valve, first counterbalance valve is connected with fuel tank through radiator, second counterbalance valve directly is connected with fuel tank, this system in use, hydraulic oil exports main control valve to through oil feed pump, enter radiator by the main control valve outlet through first counterbalance valve, behind radiator heat-dissipation, get back to fuel tank, when pressure in the loop reaches the second counterbalance valve opening pressure, second counterbalance valve is opened, and directly gets back to fuel tank from the hydraulic oil part that main control valve comes out through second counterbalance valve, need not through radiator heat-dissipation, though this system to a certain degree can avoid the hydraulic oil heat to scatter and disappear, guaranteed the balance of hydraulic working oil temperature, but this system can only control according to the pressure size, can't follow the variation of environment temperature and change, thereby accurate inadequately for the control of hydraulic oil temperature, there is bigger limitation.
Summary of the invention
The object of the invention provides a kind of oil return system that is used for the automatic control hydraulic oil temperature of excavator, uses this system can make hydraulic oil reach desirable operating temperature, guarantees that the use of hydraulic oil is subjected to the influence of environment temperature less.
For achieving the above object, the technical solution used in the present invention is: a kind of oil return system that is used for the automatic control hydraulic oil temperature of excavator, comprise power source, the oil feed pump that is connected with power source, be connected with main control valve and control oil pump respectively with described oil feed pump delivery outlet, described main control valve delivery outlet is connected with radiator through first counterbalance valve, described radiator delivery outlet is connected with hydraulic oil container, also be connected with second counterbalance valve with described main control valve delivery outlet, described second counterbalance valve is controlled counterbalance valve, the described second counterbalance valve delivery outlet is connected with hydraulic oil container, and the control port of described second counterbalance valve is connected with temperature control modules.
In the technique scheme, described excavator is a prior art, its power source is generally motor, by motor driven oil feed pump fuel feeding, oil feed pump output hydraulic oil reaches main control valve, the delivery outlet of main control valve is connected with first counterbalance valve, the delivery outlet of first counterbalance valve is connected with radiator, the outlet of radiator is connected with hydraulic oil container, hydraulic oil is got back to hydraulic oil container from the main control valve delivery outlet again through first counterbalance valve behind radiator heat-dissipation, native system also is connected with second counterbalance valve at the delivery outlet of main control valve, second counterbalance valve is in parallel with first counterbalance valve, the delivery outlet of second counterbalance valve directly is connected with hydraulic oil container, and the control port of second counterbalance valve is connected with temperature control modules.This oil return system in use, when excavator just starts, because hydraulic oil temperature is relatively low, temperature control modules is controlled second counterbalance valve and is opened, the second counterbalance valve pressure is lower than first counterbalance valve, directly flow back to hydraulic oil container from the hydraulic oil of main control valve delivery outlet output through second counterbalance valve, need not through radiator heat-dissipation; Continuous work along with excavator, the hydraulic oil container temperature raises, and temperature control modules is controlled second counterbalance valve and closed gradually, and the hydraulic oil of main control valve output flows into first counterbalance valve, behind radiator heat-dissipation, get back to hydraulic oil container again, thereby reached the ideal operation temperature balance of hydraulic oil.
Further technical scheme, described temperature control modules comprises a temperature pick up that is connected with hydraulic oil container, described temperature pick up output is connected with controller, described controller output end is connected with proportional pressure-reducing valve, described proportional pressure-reducing valve input port is connected with described control oil pump, and the delivery outlet of described proportional pressure-reducing valve is connected with the control port of second counterbalance valve.Described temperature pick up is used to detect hydraulic fluid temperature in the hydraulic oil container, be transferred to controller behind the collecting temperature signal, controller is connected with proportional pressure-reducing valve, by signal of telecommunication control ratio reducing valve, the delivery outlet of control oil pump links to each other with proportional pressure-reducing valve, can provide hydraulic oil for proportional pressure-reducing valve, and the delivery outlet of proportional pressure-reducing valve is connected with the control port of second counterbalance valve, thereby hydraulic oil is transferred to second counterbalance valve, realize proportional control second counterbalance valve.
Because the technique scheme utilization, the present invention compared with prior art has following advantage:
1. the present invention passes through at main control delivery outlet second counterbalance valve in parallel, the delivery outlet of second counterbalance valve directly links to each other with hydraulic oil container, second counterbalance valve is controlled through temperature control modules, when the hydraulic oil container temperature is low, second counterbalance valve is opened, hydraulic oil directly flows back to fuel tank through second counterbalance valve, when the hydraulic oil container temperature raises, second counterbalance valve cuts out gradually, hydraulic oil flows back to fuel tank through first counterbalance valve and radiator, thereby make hydraulic oil reach desirable operating temperature, guaranteed that hydraulic oil is subjected to the influence of environment temperature less;
2. oil return system of the present invention can adopt identical hydraulic oil under different environment temperatures, the varying environment temperature need be changed different hydraulic oil as compared with the past, has saved cost;
3. the present invention need not change on a large scale to existing oil return system, is easy to realize;
4. the present invention is simple in structure, and is easy to use, and low production cost, is fit to promote the use of.
Description of drawings
Fig. 1 is the schematic diagram of the embodiment of the invention one.
Wherein: 1, power source; 2, oil feed pump; 3, main control valve; 4, control oil pump; 5, first counterbalance valve; 6, radiator; 7, hydraulic oil container; 8, second counterbalance valve; 9, temperature pick up; 10, controller; 11, proportional pressure-reducing valve.
The specific embodiment
Below in conjunction with drawings and Examples the present invention is further described:
Embodiment one: referring to shown in Figure 1, a kind of oil return system that is used for the automatic control hydraulic oil temperature of excavator, comprise power source 1, the oil feed pump 2 that is connected with power source, be connected with main control valve 3 and control oil pump 4 respectively with described oil feed pump 2 delivery outlets, described main control valve 3 delivery outlets are connected with radiator 6 through first counterbalance valve 5, described radiator 6 delivery outlets are connected with hydraulic oil container 7, also be connected with second counterbalance valve 8 with described main control valve 3 delivery outlets, described second counterbalance valve 8 is controlled counterbalance valve, described second counterbalance valve, 8 delivery outlets are connected with hydraulic oil container 7, the control port of described second counterbalance valve 8 is connected with temperature control modules, described temperature control modules comprises a temperature pick up 9 that is connected with hydraulic oil container 7, described temperature pick up 9 outputs are connected with controller 10, described controller 10 outputs are connected with proportional pressure-reducing valve 11, and described proportional pressure-reducing valve 11 input ports are connected with described control oil pump 4, and the delivery outlet of described proportional pressure-reducing valve 11 is connected with the control port of second counterbalance valve 8.
Native system in use, when hydraulic oil is exported from oil feed pump 2 delivery outlets, entering main control valve 3 exports from the main control valve delivery outlet again, hydraulic fluid temperature is relatively low when complete machine just starts, this moment, the temperature of controller 10 collecting temperature sensors 9 was calculated the back output current to proportional pressure-reducing valve 11 by controller, the proportional pressure-reducing valve received signal is also transmitted hydraulic oil to the second counterbalance valve 8 in proportion, make the pressure of second counterbalance valve 8 be lower than the pressure of first counterbalance valve 5, preferentially enter 8 mouthfuls of second counterbalance valves and finally enter hydraulic oil container 7 thereby make from the hydraulic oil of main control valve 3 delivery outlets output, because this path does not pass through radiator 6, so hydraulic fluid temperature can be rapidly heated at short notice; When the hydraulic oil container temperature raises gradually, temperature pick up 9 can be given controller 10 1 input signals in real time, controller is by calculating the output pressure of giving proportion magnetic valve 11 1 input current control ratio reducing valve delivery outlets, thereby control the opening pressure of second counterbalance valve 8, pressure rising when second counterbalance valve, the minimizing gradually that the hydraulic oil of main control valve 3 delivery outlets output enters second counterbalance valve, the hydraulic oil that enters first counterbalance valve 5 increases gradually, thereby hydraulic oil flows into hydraulic oil container again through the first counterbalance valve delivery outlet after radiator 6 heat radiations, make hydraulic oil obtain cooling, final by reach the ideal operation temperature balance of hydraulic oil with cocycle.
Claims (2)
1. oil return system that is used for the automatic control hydraulic oil temperature of excavator, comprise power source (1), the oil feed pump (2) that is connected with power source (1), be connected with main control valve (3) and control oil pump (4) respectively with described oil feed pump (2) delivery outlet, described main control valve (3) delivery outlet is connected with radiator (6) through first counterbalance valve (5), described radiator (6) delivery outlet is connected with hydraulic oil container (7), it is characterized in that: also be connected with second counterbalance valve (8) with described main control valve (3) delivery outlet, described second counterbalance valve (8) is controlled counterbalance valve, described second counterbalance valve (8) delivery outlet is connected with hydraulic oil container (7), and the control port of described second counterbalance valve (8) is connected with temperature control modules.
2. a kind of oil return system that is used for the automatic control hydraulic oil temperature of excavator according to claim 1, it is characterized in that: described temperature control modules comprises a temperature pick up (9) that is connected with hydraulic oil container (7), described temperature pick up (9) output is connected with controller (10), described controller (10) output is connected with proportional pressure-reducing valve (11), described proportional pressure-reducing valve (11) input port is connected with described control oil pump (4), and the delivery outlet of described proportional pressure-reducing valve (11) is connected with the control port of second counterbalance valve (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010296099 CN101974926A (en) | 2010-09-29 | 2010-09-29 | Oil returning system capable of automatically controlling hydraulic oil temperature used for excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010296099 CN101974926A (en) | 2010-09-29 | 2010-09-29 | Oil returning system capable of automatically controlling hydraulic oil temperature used for excavator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101974926A true CN101974926A (en) | 2011-02-16 |
Family
ID=43574831
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010296099 Pending CN101974926A (en) | 2010-09-29 | 2010-09-29 | Oil returning system capable of automatically controlling hydraulic oil temperature used for excavator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101974926A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061719A (en) * | 2010-12-09 | 2011-05-18 | 三一重机有限公司 | Excavator overheating protection method |
| CN102493521A (en) * | 2011-12-01 | 2012-06-13 | 徐州徐工挖掘机械有限公司 | Energy-saving control method for cooling system of excavator |
| CN102995699A (en) * | 2012-12-13 | 2013-03-27 | 三一重机有限公司 | Excavator and hydraulic oil heat dissipation power adjusting device thereof |
| CN103122648A (en) * | 2012-12-28 | 2013-05-29 | 上海三一重机有限公司 | Multi-way valve hydraulic control system, rectilinear walking control valve and excavator |
| CN103470574A (en) * | 2013-08-30 | 2013-12-25 | 三一重机有限公司 | Hydraulic oil-return device, hydraulic system and excavator |
| CN103806497A (en) * | 2014-02-14 | 2014-05-21 | 上海三一重机有限公司 | Oil return system allowing oil temperature to be regulated automatically and excavator |
| CN104981615A (en) * | 2013-02-19 | 2015-10-14 | 沃尔沃建造设备有限公司 | Hydraulic system for construction machine, provided with protection device |
| CN105339562A (en) * | 2013-06-26 | 2016-02-17 | 沃尔沃建造设备有限公司 | Device for controlling control valve of construction machine, method for controlling same, and method for controlling discharge flow rate of hydraulic pump |
| CN106284480A (en) * | 2016-08-24 | 2017-01-04 | 四川邦立重机有限责任公司 | excavator hydraulic oil temperature automatic control method |
| CN106523476A (en) * | 2016-06-13 | 2017-03-22 | 柳州柳工挖掘机有限公司 | Integrated hydraulic oil radiator |
| CN107268704A (en) * | 2017-08-08 | 2017-10-20 | 济宁山重新能源有限公司 | A kind of novel energy-conserving hydraulic excavator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07334247A (en) * | 1994-06-14 | 1995-12-22 | Sumitomo Constr Mach Co Ltd | Temperature controller for hydraulic oil |
| JPH11124881A (en) * | 1997-10-23 | 1999-05-11 | Hitachi Constr Mach Co Ltd | Hydraulic drive device |
| WO2003027505A1 (en) * | 2001-09-25 | 2003-04-03 | Yanmar Co.,Ltd. | Hydraulic circuit of working machine |
| CN101010497A (en) * | 2005-04-07 | 2007-08-01 | 日立建机株式会社 | Cooling device for construction machine |
| CN201071508Y (en) * | 2007-07-27 | 2008-06-11 | 韩顺和 | Hydraulic unit of squeezing and expanding disk machine |
| CN101268286A (en) * | 2005-09-20 | 2008-09-17 | 日立建机株式会社 | Working fluid cooling control system of construction machine |
-
2010
- 2010-09-29 CN CN 201010296099 patent/CN101974926A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07334247A (en) * | 1994-06-14 | 1995-12-22 | Sumitomo Constr Mach Co Ltd | Temperature controller for hydraulic oil |
| JPH11124881A (en) * | 1997-10-23 | 1999-05-11 | Hitachi Constr Mach Co Ltd | Hydraulic drive device |
| WO2003027505A1 (en) * | 2001-09-25 | 2003-04-03 | Yanmar Co.,Ltd. | Hydraulic circuit of working machine |
| CN101010497A (en) * | 2005-04-07 | 2007-08-01 | 日立建机株式会社 | Cooling device for construction machine |
| CN101268286A (en) * | 2005-09-20 | 2008-09-17 | 日立建机株式会社 | Working fluid cooling control system of construction machine |
| CN201071508Y (en) * | 2007-07-27 | 2008-06-11 | 韩顺和 | Hydraulic unit of squeezing and expanding disk machine |
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102061719A (en) * | 2010-12-09 | 2011-05-18 | 三一重机有限公司 | Excavator overheating protection method |
| CN102493521A (en) * | 2011-12-01 | 2012-06-13 | 徐州徐工挖掘机械有限公司 | Energy-saving control method for cooling system of excavator |
| CN102493521B (en) * | 2011-12-01 | 2013-09-25 | 徐州徐工挖掘机械有限公司 | Energy-saving control method for cooling system of excavator |
| CN102995699A (en) * | 2012-12-13 | 2013-03-27 | 三一重机有限公司 | Excavator and hydraulic oil heat dissipation power adjusting device thereof |
| CN102995699B (en) * | 2012-12-13 | 2016-01-20 | 三一重机有限公司 | Excavator and hydraulic oil heat dissipation power adjusting device thereof |
| CN103122648B (en) * | 2012-12-28 | 2015-06-17 | 上海三一重机有限公司 | Multi-way valve hydraulic control system, rectilinear walking control valve and excavator |
| CN103122648A (en) * | 2012-12-28 | 2013-05-29 | 上海三一重机有限公司 | Multi-way valve hydraulic control system, rectilinear walking control valve and excavator |
| CN104981615A (en) * | 2013-02-19 | 2015-10-14 | 沃尔沃建造设备有限公司 | Hydraulic system for construction machine, provided with protection device |
| CN105339562A (en) * | 2013-06-26 | 2016-02-17 | 沃尔沃建造设备有限公司 | Device for controlling control valve of construction machine, method for controlling same, and method for controlling discharge flow rate of hydraulic pump |
| CN103470574A (en) * | 2013-08-30 | 2013-12-25 | 三一重机有限公司 | Hydraulic oil-return device, hydraulic system and excavator |
| CN103806497A (en) * | 2014-02-14 | 2014-05-21 | 上海三一重机有限公司 | Oil return system allowing oil temperature to be regulated automatically and excavator |
| CN106523476A (en) * | 2016-06-13 | 2017-03-22 | 柳州柳工挖掘机有限公司 | Integrated hydraulic oil radiator |
| CN106523476B (en) * | 2016-06-13 | 2019-11-19 | 柳州柳工挖掘机有限公司 | Integrated hydraulic oil radiator |
| CN106284480A (en) * | 2016-08-24 | 2017-01-04 | 四川邦立重机有限责任公司 | excavator hydraulic oil temperature automatic control method |
| CN106284480B (en) * | 2016-08-24 | 2018-10-09 | 四川邦立重机有限责任公司 | excavator hydraulic oil temperature automatic control method |
| CN107268704A (en) * | 2017-08-08 | 2017-10-20 | 济宁山重新能源有限公司 | A kind of novel energy-conserving hydraulic excavator |
| CN107268704B (en) * | 2017-08-08 | 2023-08-29 | 济宁山重新能源有限公司 | Novel energy-saving hydraulic excavator |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101974926A (en) | Oil returning system capable of automatically controlling hydraulic oil temperature used for excavator | |
| CN201858218U (en) | Oil return device for engineering machinery | |
| CN103912540A (en) | Hydraulic oil temperature control system and engineering machinery | |
| CN102654097B (en) | Industrial circulating water Intelligent residual pressure recycling device and using method thereof | |
| CN201696054U (en) | Closed-type hydraulic driving system with variable-speed variable-displacement combined control of shield cutter head | |
| CN103806497A (en) | Oil return system allowing oil temperature to be regulated automatically and excavator | |
| CN101851941B (en) | Cooling control system of fan of bulldozer | |
| CN103205992B (en) | A kind of excavator Power control component and method | |
| CN102979744A (en) | Engineering machinery full hydraulic automatic air cooling system | |
| RU119019U1 (en) | DOSING PUMP INSTALLATION | |
| CN203718384U (en) | Thick oil stripper well doping thin oil reutilization pipeline | |
| CN106013315B (en) | A kind of excavator, which recovers energy, utilizes system | |
| CN203215830U (en) | Remote conveying-dual-parameter operational concentrated heat supplying pipe network | |
| CN210485240U (en) | Lubricating oil heating device of track moving cone crusher | |
| CN202248035U (en) | Hydraulic system of excavator | |
| CN211233207U (en) | Heat exchange medium pipe network of ground source heat pump air conditioning system | |
| RU2523706C1 (en) | Wind-driven power plant | |
| CN203239688U (en) | Pump station automatic cooling device | |
| CN202757190U (en) | Hydraulic module specially used for ground source heat pump unit | |
| CN202117700U (en) | High and low pressure hydraulic energy exchange system used in pit | |
| CN101893020A (en) | Preheating structure for hydraulic system | |
| CN210025735U (en) | Automatic temperature regulating and controlling device | |
| CN111075798A (en) | Piston type filling industrial pump hydraulic system | |
| CN102995699A (en) | Excavator and hydraulic oil heat dissipation power adjusting device thereof | |
| CN201666319U (en) | Variable speed hydraulic coupling of grab dredger |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20110216 |