CN103806497A - Oil return system allowing oil temperature to be regulated automatically and excavator - Google Patents
Oil return system allowing oil temperature to be regulated automatically and excavator Download PDFInfo
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- CN103806497A CN103806497A CN201410052314.6A CN201410052314A CN103806497A CN 103806497 A CN103806497 A CN 103806497A CN 201410052314 A CN201410052314 A CN 201410052314A CN 103806497 A CN103806497 A CN 103806497A
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- temperature
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- oil return
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Abstract
The invention discloses an oil return system allowing oil temperature to be regulated automatically and an excavator, and belongs to the field of mechanical control. The oil return system comprises a power source 1, an oil supply pump 2, a main control valve 3, a first back pressure valve 4, a first heat sink 5, a second back pressure valve 6, a proportional overflow valve 7, a temperature control module 8 and an oil tank 9. The power source 1 is connected with the oil supply pump 2 which is connected with an inlet of the main control valve 3, and an outlet of the main control valve 3 is connected with the first back pressure valve 4 and the second back pressure valve 6. The first back pressure valve 4 is connected with the first heat sink 5 which is connected with the oil tank 9. The second back pressure valve 6 is connected with the proportional overflow valve 7 which is connected with the oil tank 9. The temperature control module 8 is connected with the proportional overflow valve 7, and the temperature control module 8 controls the magnitude of the valve opening degree of the proportional overflow valve 7 according to the oil temperature in the oil return system. According to the oil return system allowing oil temperature to be regulated automatically and the excavator, the temperature control module is adopted, so that the excavator works efficiently and stably in any working condition.
Description
Technical field
The invention belongs to plant equipment control field, relate to a kind of oil temperature control system, relate in particular to the oil return system of the automatic adjusting oil temperature that a kind of excavator uses.
Background technology
At present a lot of digging machine summer, long-term work there will be hydraulic oil temperature superelevation to cause excavator hydraulic system leakage rate large, affects digging machine operating efficiency along with the rising of environment temperature; Superhigh temperature also can cause Hydraulic Seals to damage simultaneously, affects quality and the application life of digging machine.Meanwhile, existing cooling system can cause hydraulic oil temperature low at north of china in winter, and causing cannot normal construction.
Therefore, those skilled in the art is devoted to exploitation and can effectively controls hydraulic system temperature, realize the efficiently radiates heat of summer environment temperature oil temperature in hydraulic system when higher, guarantee the control system that excavator temperature can effectively be worked in the winter time, and can guarantee system even running.
Summary of the invention
In view of this, the present invention adopts temperature control modules, according to practical working situation, hydraulic fluid temperature is effectively controlled, and guarantees digging machine hydraulic working oil oil temperature minimum affected by environment, realized excavator under any industrial and mineral efficiently, work stably.
For achieving the above object, concrete technical scheme is as follows:
On the one hand, a kind of oil return system of automatic adjusting oil temperature is provided, be applicable to excavator, comprise power source, oil feed pump, main control valve, the first counterbalance valve, the first radiator, the second counterbalance valve, proportional pressure control valve, temperature control modules and fuel tank, described power source is connected with described oil feed pump, described oil feed pump is connected with the entrance of described main control valve, the outlet of described main control valve is connected with described the first counterbalance valve and the second counterbalance valve, described the first counterbalance valve is connected with described the first radiator, described the first radiator is connected with described fuel tank, described the second counterbalance valve is connected with described proportional pressure control valve, described proportional pressure control valve is connected with described fuel tank, described temperature control modules is connected with described proportional pressure control valve, described temperature control modules is controlled the size of the valve opening of described proportional pressure control valve according to the oil temperature height in described oil return system.
Preferably, described temperature control modules is less according to the valve opening of the described proportional pressure control valve of the higher control of the oil temperature in described oil return system.
Preferably, also comprise switch valve, the 3rd counterbalance valve and the second radiator, described switch valve is connected with the outlet of described main control valve, described switch valve is connected with described the 3rd counterbalance valve, described the 3rd counterbalance valve is connected with described the second radiator, described the second radiator is connected with described fuel tank, and described switch valve is connected with described temperature control modules, and the switch of the valve of described switch valve is controlled in described temperature control modules control according to the oil temperature height in described oil return system.
Preferably, also comprise controller and temperature pick up, described controller is connected with described switch valve, the switch of the valve of switch valve described in described controller control, described temperature pick up is located in described fuel tank, described temperature pick up is connected with described controller, and described controller is connected with described temperature control modules.
Preferably, in described the second radiator, also comprise electric motor, described controller is connected with described electric motor.
Preferably, described proportional pressure control valve is electromagnetic proportion relief valve.
Preferably, described switch valve is electromagnetic switch valve.
Preferably, described power source is motor.
On the other hand, provide a kind of excavator, comprise the oil return system of automatic adjusting oil temperature as above.
With respect to prior art, the advantage of technical scheme of the present invention has:
1, solve " high temperature poor efficiency " problem that high temperature brings, guaranteed the effective operation of excavator under long-time high temperature;
2, hydraulic fluid temperature can regulate according to the variation of environment temperature, guaranteed excavator can be efficiently under any industrial and mineral, smooth working;
3, adopt temperature control modules, connect electromagnetic relief valve, according to practical working situation, hydraulic fluid temperature is effectively controlled, guarantee digging machine hydraulic working oil oil temperature minimum affected by environment;
4, the second radiator is in parallel with the first radiator, and by electromagnetic switch control, controller is controlled in real time to electric motor according to actual needs, when guaranteeing the normal work of hydraulic oil, has reduced power dissipation.
Accompanying drawing explanation
The accompanying drawing that forms a part of the present invention is used to provide a further understanding of the present invention, and schematic description and description of the present invention is used for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the embodiment of the present invention.
Wherein, 1 is that power source, 2 is that oil feed pump, 3 is that main control valve, 4 is that the first counterbalance valve, 5 is that the first radiator, 6 is that the second counterbalance valve, 7 is that proportional pressure control valve, 8 is that temperature control modules, 9 is that fuel tank, 10 is that temperature pick up, 11 is that controller, 12 is that switch valve, 13 is that the 3rd counterbalance valve, 14 is that electric motor, 15 is the second radiator.
The specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is only the present invention's part embodiment, rather than whole embodiment.Based on the embodiment in the present invention, those of ordinary skills, not making the every other embodiment obtaining under creative work prerequisite, belong to the scope of protection of the invention.
It should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the present invention can combine mutually.
Below with reference to accompanying drawing, embodiments of the invention are done to concrete explaination.
Oil return system and the excavator of a kind of automatic adjusting oil temperature of embodiments of the invention as shown in Figure 1, comprises power source 1, oil feed pump 2, main control valve 3, the first counterbalance valve 4, the first radiator 5, the second counterbalance valve 6, proportional pressure control valve 7, temperature control modules 8 and fuel tank 9.
Power source 1 is connected with oil feed pump 2, and oil feed pump 2 is connected with the entrance of main control valve 3, and the outlet of main control valve 3 is connected with the first counterbalance valve 4 and the second counterbalance valve 6.The first counterbalance valve 4 is connected with the first radiator 5, and the first radiator 5 is connected with fuel tank 9.The second counterbalance valve 6 is connected with proportional pressure control valve 7, and proportional pressure control valve 7 is connected with fuel tank 9.Temperature control modules 8 is connected with proportional pressure control valve 7, and temperature control modules 8 is according to the size of the valve opening of the oil temperature height control ratio overflow valve 7 in oil return system.
Embodiments of the invention adopt temperature control modules, according to practical working situation, hydraulic fluid temperature are effectively controlled, and guarantee digging machine hydraulic working oil oil temperature minimum affected by environment, realized excavator under any industrial and mineral efficiently, work stably.
The power source 1 of embodiments of the invention is motor, by Engine driven Hydraulic Pump fuel feeding.Oil feed pump 2 output hydraulic pressure oil arrive main control valve 3, and hydraulic oil is got back to fuel tank 9 from main control valve 3 delivery outlets again through the first counterbalance valve 4 after the first radiator 5 heat radiations.
The second counterbalance valve 6 being in addition connected with main control valve 3.The second counterbalance valve 6 is in parallel with the first counterbalance valve 4 again after connecting with electromagnetic proportion relief valve.The delivery outlet of the second counterbalance valve is connected with fuel tank 9, and electromagnetic proportion relief valve is connected with temperature control modules 8.In the time that temperature is lower, temperature control modules 8 is controlled the electromagnetic proportion relief valve being connected with the second counterbalance valve 6, when the second counterbalance valve 6 pressure are lower than the first counterbalance valve 4, from the oil of main control valve 3 delivery outlets outputs through the direct oil sump tank 9 of the second counterbalance valve 6, without through radiator heat-dissipation; Along with excavator is constantly worked, hydraulic fluid temperature raises, and temperature control modules 8 is controlled electromagnetic proportion relief valve and closed gradually, and the hydraulic oil that main control valve 3 is exported is through the first counterbalance valve 4, after the first radiator 5 heat radiations, get back to fuel tank 9 again, thereby reach the ideal operation equalized temperature of hydraulic oil.
As shown in fig. 1, in an embodiment of the present invention, preferably also comprise switch valve 12, the 3rd counterbalance valve 13 and the second radiator 15.Switch valve 12 is connected with the outlet of main control valve 3, and switch valve 12 is connected with the 3rd counterbalance valve 13, and the 3rd counterbalance valve 13 is connected with the second radiator 15, and the second radiator 15 is connected with fuel tank 9.Switch valve 12 is connected with temperature control modules 8, and temperature control modules 8 is controlled according to the switch of the valve of the oil temperature height gauge tap valve 12 in oil return system.
The second radiator 15 is in parallel with the first radiator 5 again after connecting with the 3rd counterbalance valve 13, electromagnetic switch valve 12.In the time that hydraulic oil temperature disequilibrium exceeds limited field, temperature control modules 8 is opened electromagnetic switch valve 12, and close electromagnetic proportion relief valve 7, the hydraulic oil that main control valve 3 is exported enters the first radiator 5 and the second radiator 15 simultaneously, gets back to fuel tank 9 after radiator heat-dissipation.
As shown in fig. 1, in an embodiment of the present invention, preferably also comprise controller 11 and temperature pick up 10, controller 11 is connected with switch valve 12, the switch of the valve of controller 11 gauge tap valves 12, temperature pick up 10 is located in fuel tank 9, and temperature pick up 10 is connected with controller 11, and controller 11 is connected with temperature control modules 8.
In addition, preferably in the second radiator 15, also comprise electric motor 14, controller 11 is connected with electric motor 14.
Temperature pick up 10, for detection of the temperature of fuel tank 9 interior hydraulic oil, is transferred to controller 11 after collecting temperature signal.Controller 11 is connected with electromagnetic switch valve 12, controls the unlatching of electromagnetic switch valve 12; Also be connected with electric motor 14 with Time Controller 11, in the time that electromagnetic switch valve 12 is opened, controller 11 provides signal and opens electric motor 14 fans.Controller 11 outputs are also connected with electromagnetic proportion relief valve 7, control the unlatching of electromagnetic proportion relief valve 7, thereby control the loop of the second counterbalance valve 6.
Embodiments of the invention adopt temperature control modules, connect electromagnetic relief valve, according to practical working situation, hydraulic fluid temperature are effectively controlled, and guarantee digging machine hydraulic working oil oil temperature minimum affected by environment; The second radiator is in parallel with the first radiator simultaneously, and by electromagnetic switch control, controller is controlled in real time to electric motor according to actual needs, when guaranteeing the normal work of hydraulic oil, has reduced power dissipation.
Above specific embodiments of the invention be have been described in detail, but it is just as example, the present invention is not restricted to specific embodiment described above.To those skilled in the art, any equivalent modifications that the present invention is carried out and alternative also all among category of the present invention.Therefore, equalization conversion and the modification done without departing from the spirit and scope of the invention, all should contain within the scope of the invention.
Claims (9)
1. one kind regulates the oil return system of oil temperature automatically, be applicable to excavator, it is characterized in that, comprise power source (1), oil feed pump (2), main control valve (3), the first counterbalance valve (4), the first radiator (5), the second counterbalance valve (6), proportional pressure control valve (7), temperature control modules (8) and fuel tank (9), described power source (1) is connected with described oil feed pump (2), described oil feed pump (2) is connected with the entrance of described main control valve (3), the outlet of described main control valve (3) is connected with described the first counterbalance valve (4) and the second counterbalance valve (6), described the first counterbalance valve (4) is connected with described the first radiator (5), described the first radiator (5) is connected with described fuel tank (9), described the second counterbalance valve (6) is connected with described proportional pressure control valve (7), described proportional pressure control valve (7) is connected with described fuel tank (9), described temperature control modules (8) is connected with described proportional pressure control valve (7), described temperature control modules (8) is controlled the size of the valve opening of described proportional pressure control valve (7) according to the oil temperature height in described oil return system.
2. the oil return system of automatic adjusting oil temperature as claimed in claim 1, is characterized in that, described temperature control modules (8) is less according to the valve opening of the described proportional pressure control valve of the higher control of the oil temperature in described oil return system (7).
3. the oil return system of automatic adjusting oil temperature as claimed in claim 2, it is characterized in that, also comprise switch valve (12), the 3rd counterbalance valve (13) and the second radiator (15), described switch valve (12) is connected with the outlet of described main control valve (3), described switch valve (12) is connected with described the 3rd counterbalance valve (13), described the 3rd counterbalance valve (13) is connected with described the second radiator (15), described the second radiator is connected with described fuel tank (9), described switch valve (12) is connected with described temperature control modules (8), described temperature control modules (8) is controlled the switch of controlling the valve of described switch valve (12) according to the oil temperature height in described oil return system.
4. the oil return system of automatic adjusting oil temperature as claimed in claim 3, it is characterized in that, also comprise controller (11) and temperature pick up (10), described controller (11) is connected with described switch valve (12), described controller (11) is controlled the switch of the valve of described switch valve (12), described temperature pick up (10) is located in described fuel tank (9), described temperature pick up (10) is connected with described controller (11), and described controller (11) is connected with described temperature control modules (8).
5. the oil return system of automatic adjusting oil temperature as claimed in claim 4, is characterized in that, also comprises electric motor (14) in described the second radiator (15), and described controller (11) is connected with described electric motor (14).
6. the oil return system of automatic adjusting oil temperature as claimed in claim 5, is characterized in that, described proportional pressure control valve (7) is electromagnetic proportion relief valve.
7. the oil return system of automatic adjusting oil temperature as claimed in claim 6, is characterized in that, described switch valve (12) is electromagnetic switch valve.
8. the oil return system of automatic adjusting oil temperature as claimed in claim 7, is characterized in that, described power source (1) is motor.
9. an excavator, is characterized in that, comprises the oil return system of the automatic adjusting oil temperature as described in claim 1 to 8 any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410052314.6A CN103806497A (en) | 2014-02-14 | 2014-02-14 | Oil return system allowing oil temperature to be regulated automatically and excavator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410052314.6A CN103806497A (en) | 2014-02-14 | 2014-02-14 | Oil return system allowing oil temperature to be regulated automatically and excavator |
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| CN103806497A true CN103806497A (en) | 2014-05-21 |
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| CN201410052314.6A Pending CN103806497A (en) | 2014-02-14 | 2014-02-14 | Oil return system allowing oil temperature to be regulated automatically and excavator |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105840800A (en) * | 2016-06-01 | 2016-08-10 | 陕西法士特齿轮有限责任公司 | Transmission gear oil air-cooled cooling system and adjusting method |
| 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 |
| CN106948407A (en) * | 2015-09-21 | 2017-07-14 | 卡特彼勒公司 | Hammer temperature protection system and method |
| CN107327434A (en) * | 2017-08-08 | 2017-11-07 | 济宁山重新能源有限公司 | It is a kind of can stable hydraulic oil temperature bypass back pressure pile-up valve |
| CN111608998A (en) * | 2020-05-12 | 2020-09-01 | 湖北锐坤机械制造有限公司 | Hydraulic control system of loader-digger for coal mine |
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| JPH07334247A (en) * | 1994-06-14 | 1995-12-22 | Sumitomo Constr Mach Co Ltd | Temperature controller for hydraulic oil |
| CN101974926A (en) * | 2010-09-29 | 2011-02-16 | 三一重机有限公司 | Oil returning system capable of automatically controlling hydraulic oil temperature used for excavator |
| US20110132012A1 (en) * | 2008-06-30 | 2011-06-09 | Agco Gmbh | Flow control |
| CN202689078U (en) * | 2012-06-26 | 2013-01-23 | 合肥振宇工程机械有限公司 | Oil return control mechanism of hydraulic system of excavator |
| CN202746040U (en) * | 2012-07-19 | 2013-02-20 | 中外合资沃得重工（中国）有限公司 | Automatic temperature control type cooling system for diesel engine fuel oil |
| CN103541389A (en) * | 2013-09-24 | 2014-01-29 | 徐州徐工特种工程机械有限公司 | Adjustable independent heat dissipation device of loader-digger |
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2014
- 2014-02-14 CN CN201410052314.6A patent/CN103806497A/en active Pending
Patent Citations (6)
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| JPH07334247A (en) * | 1994-06-14 | 1995-12-22 | Sumitomo Constr Mach Co Ltd | Temperature controller for hydraulic oil |
| US20110132012A1 (en) * | 2008-06-30 | 2011-06-09 | Agco Gmbh | Flow control |
| CN101974926A (en) * | 2010-09-29 | 2011-02-16 | 三一重机有限公司 | Oil returning system capable of automatically controlling hydraulic oil temperature used for excavator |
| CN202689078U (en) * | 2012-06-26 | 2013-01-23 | 合肥振宇工程机械有限公司 | Oil return control mechanism of hydraulic system of excavator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106948407A (en) * | 2015-09-21 | 2017-07-14 | 卡特彼勒公司 | Hammer temperature protection system and method |
| CN105840800A (en) * | 2016-06-01 | 2016-08-10 | 陕西法士特齿轮有限责任公司 | Transmission gear oil air-cooled cooling system and adjusting method |
| 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 |
| CN107327434A (en) * | 2017-08-08 | 2017-11-07 | 济宁山重新能源有限公司 | It is a kind of can stable hydraulic oil temperature bypass back pressure pile-up valve |
| CN111608998A (en) * | 2020-05-12 | 2020-09-01 | 湖北锐坤机械制造有限公司 | Hydraulic control system of loader-digger for coal mine |
| CN111608998B (en) * | 2020-05-12 | 2022-06-21 | 湖北锐坤机械制造有限公司 | Hydraulic control system of loader-digger for coal mine |
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