CN110397110A - A kind of excavator hydraulic oil-returning system and its control method, excavator - Google Patents
A kind of excavator hydraulic oil-returning system and its control method, excavator Download PDFInfo
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- CN110397110A CN110397110A CN201910687658.7A CN201910687658A CN110397110A CN 110397110 A CN110397110 A CN 110397110A CN 201910687658 A CN201910687658 A CN 201910687658A CN 110397110 A CN110397110 A CN 110397110A
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- excavator
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000003921 oil Substances 0.000 claims abstract description 136
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 75
- 230000017525 heat dissipation Effects 0.000 claims abstract description 16
- 238000001514 detection method Methods 0.000 claims abstract description 5
- 239000007788 liquid Substances 0.000 claims description 7
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 4
- 239000000446 fuel Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000009123 feedback regulation Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000010259 detection of temperature stimulus Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000003134 recirculating effect Effects 0.000 description 1
- 230000008439 repair process Effects 0.000 description 1
- 238000012163 sequencing technique Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/2278—Hydraulic circuits
- E02F9/2289—Closed circuit
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Fluid-Pressure Circuits (AREA)
- Operation Control Of Excavators (AREA)
Abstract
The invention discloses a kind of excavator hydraulic oil-returning system and its control methods, excavator, are related to technical field of engineering machinery.Including hydraulic oil container, and the main pump and pioneer pump being connected with hydraulic tank respectively, main pump is connected to by oil feed line with main valve component, main valve component is connected to load and electric-hydraulic proportion flow divider respectively, pioneer pump is connected to by pilot control pipeline with the Lead side of electric-hydraulic proportion flow divider, the first oil return line and the second oil return line in parallel is additionally provided between electric-hydraulic proportion flow divider and the hydraulic oil container, radiator is provided on first oil return line or the second oil return line, temperature sensor is provided in hydraulic oil container, temperature sensor and electric-hydraulic proportion flow divider are electrically connected with the controller respectively, according to the oil temperature signal control electric-hydraulic proportion flow divider work for receiving temperature sensor detection.Heat dissipation capacity can be adjusted according to the oil temperature of hydraulic system, promote the stability of excavator hydraulic system working oil temperature.
Description
Technical field
The present invention relates to technical field of engineering machinery, in particular to a kind of excavator hydraulic oil-returning system and its control
Method processed, excavator.
Background technique
Hydraulic crawler excavator is a kind of high-power engineering machinery, during the work time can be because of the throttling and viscosity of hydraulic system
The factors such as friction generate a large amount of heat, so that hydraulic system heats up, and influence the lifetime of system and performance indicator of excavator.For
Hydraulic oil temperature when excavator being made to work is maintained at a suitable temperature range, it is necessary to consider to return the high temperature of hydraulic system
Oil carries out radiating treatment.Due to the hydraulic oil container small volume of excavator, this natural heat dissipation state heat-sinking capability is smaller, cannot
Guarantee the hydraulic oil temperature of excavator at work.When excavator works long hours, it is necessary to which hydraulic system is forced in consideration
Heat dissipation.
In the prior art, it handles the heat dissipation of hydraulic system, keep thermally equilibrated method mainly by main valve oil return pipe
The different check valve of two back pressures is arranged in road, and oil return is returned directly to hydraulic oil container by the lesser check valve of back pressure all the way, separately
Oil return all the way then passes through the biggish check valve of back pressure and returns hydraulic oil container after radiator, realizes heat dissipation with this.
But carrying out forced heat radiation itself to hydraulic system is a complicated process, how much needs of heat dissipation are not according to
With season, the environment temperature and excavator duration that uses determine.And in routine techniques, once oil return line sets type selecting
Afterwards, it can not just regulate and control at work, feedback regulation cannot be made according to the oil temperature of hydraulic system to radiate, excavator is made to exist
It is subject to certain restrictions when use.
Summary of the invention
The purpose of the present invention is to provide a kind of excavator hydraulic oil-returning system and its control method, excavator, Neng Gougen
Heat dissipation capacity is adjusted according to the oil temperature of hydraulic system, promotes the stability of excavator hydraulic oil-returning system.
The embodiment of the present invention is achieved in that
The one side of the embodiment of the present invention provides a kind of excavator hydraulic oil-returning system, including hydraulic oil container, and respectively
The main pump and pioneer pump connecting with the hydraulic oil container, the main pump are connected to by oil feed line with main valve component, the main valve
Component is connected to load and electric-hydraulic proportion flow divider respectively, and the pioneer pump passes through pilot control pipeline and the electric-hydraulic proportion point
The Lead side connection for flowing valve, is additionally provided with the first oil return pipe in parallel between the electric-hydraulic proportion flow divider and the hydraulic oil container
Radiator, the hydraulic oil are provided on road and the second oil return line, first oil return line or second oil return line
Temperature sensor is provided in case, the temperature sensor and the electric-hydraulic proportion flow divider are electrically connected with the controller respectively, with
The electric-hydraulic proportion flow divider work is controlled according to the oil temperature signal for receiving the temperature sensor detection.
Optionally, it is provided with oil inlet interface on the main valve component, the oil feed line passes through the oil inlet interface and institute
State main pump connection.
Optionally, oil out port and the first oil return interface, the oil out port and institute are additionally provided on the main valve component
It states and is connected between the first oil return interface by the load.
Optionally, be additionally provided with the second oil return interface on the main valve component, the second oil return interface with it is described electro-hydraulic
Proportional diverter valve connection, and the second oil return interface and the first oil return orifice.
Optionally, the load includes at least one of hydraulic cylinder and hydraulic motor.
Optionally, the excavator hydraulic oil-returning system further includes engine, and the engine is for driving the main pump
With guide's pump operation.
Optionally, the main pump and pioneer pump coaxial arrangement.
Optionally, the excavator hydraulic oil-returning system further includes radiator fan, the air side direction of the radiator fan
The radiator, for the radiator auxiliary heat dissipation.
The another aspect of the embodiment of the present invention provides a kind of excavator hydraulic oil-returning system control method, comprising: starting master
Pump and pioneer pump, make the hydraulic oil in hydraulic oil container be delivered to the Lead side of main valve component and electric-hydraulic proportion flow divider respectively；It connects
The hydraulic oil container oil temperature signal of shrinkage temperature sensor detection, and the default ratio of the pioneer pump output is controlled according to the oil temperature signal
The hydraulic oil of example, the throttling gap between spool and valve body for adjusting the electric-hydraulic proportion flow divider.
The embodiment of the present invention in another aspect, a kind of excavator is provided, including excavator liquid described in any one as above
Push back oil system.
The beneficial effect of the embodiment of the present invention includes:
Excavator hydraulic oil-returning system provided in an embodiment of the present invention and excavator, pass through the master being connected with hydraulic tank
Pump, and the main valve component being connected to main pump, make the hydraulic oil in hydraulic oil container flow through main valve component.By connecting with hydraulic oil container
The pioneer pump connect, and the pilot control pipeline being connected to pioneer pump make the hydraulic oil in hydraulic oil container pass through pilot control pipe
Road flow to the Lead side of electric-hydraulic proportion flow divider.By the load being respectively communicated with main valve component and electric-hydraulic proportion flow divider, make
Hydraulic oil in hydraulic oil container flows through load using main valve component by main pump, so that load is done manual work, the hydraulic oil after workmanship is again
Electric-hydraulic proportion flow divider is back to through main valve component.Pass through the temperature sensor and electric-hydraulic proportion point being electrically connected with the controller respectively
Valve is flowed, so that controller is controlled the proportion electro-magnet of Lead side according to the temperature signal of the temperature sensor got, so that guide
The hydraulic oil of pump output preset ratio, the throttling gap between spool and valve body for adjusting electric-hydraulic proportion flow divider, in turn
Adjust the flow for being back to hydraulic oil on the first oil return line and the second oil return line.By setting in the first oil return line or the
Radiator on two oil return lines restores the hydraulic oil for being back to hydraulic oil container to required temperature section, realizes excavator liquid
The thermal balance of oil system is pushed back, heat dissipation capacity can be adjusted according to the oil temperature of hydraulic system, and then promote excavator hydraulic oil-returning system
The stability of system working oil temperature.
Excavator hydraulic oil-returning system control method provided in an embodiment of the present invention provides institute to hydraulic circulation by main pump
The power needed controls electric-hydraulic proportion flow divider by pioneer pump, temperature sensor and controller, makes the hydraulic of reflux
Oil branches to the first oil return line and the second oil return line according to oil temperature, to carry out different degrees of heat dissipation, realizes excavator liquid
The thermal balance of oil system is pushed back, and then promotes the stability of excavator hydraulic oil-returning system working oil temperature.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached
Figure is briefly described, it should be understood that the following drawings illustrates only certain embodiments of the present invention, therefore is not construed as pair
The restriction of range for those of ordinary skill in the art without creative efforts, can also be according to this
A little attached drawings obtain other relevant attached drawings.
Fig. 1 is the structural schematic diagram of excavator hydraulic oil-returning system provided in an embodiment of the present invention.
Icon: 100- excavator hydraulic oil-returning system；110- hydraulic oil container；112- temperature sensor；120- main pump；122-
Oil feed line；130- pioneer pump；140- main valve component；142- oil inlet interface；144- oil out port；146- the first oil return interface；
148- the second oil return interface；150- load；152- hydraulic cylinder；154- hydraulic motor；160- electric-hydraulic proportion flow divider；162- guide
Side；164- pilot control pipeline；The first oil return line of 166-；The second oil return line of 168-；170- radiator；180- controller；
190- engine；192- radiator fan.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention
In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is
A part of the embodiment of the present invention, instead of all the embodiments.The present invention being usually described and illustrated herein in the accompanying drawings is implemented
The component of example can be arranged and be designed with a variety of different configurations.
Therefore, the detailed description of the embodiment of the present invention provided in the accompanying drawings is not intended to limit below claimed
The scope of the present invention, but be merely representative of selected embodiment of the invention.Based on the embodiments of the present invention, this field is common
Technical staff's every other embodiment obtained without creative efforts belongs to the model that the present invention protects
It encloses.
It should also be noted that similar label and letter indicate similar terms in following attached drawing, therefore, once a certain Xiang Yi
It is defined in a attached drawing, does not then need that it is further defined and explained in subsequent attached drawing.
In the description of the present invention, it should be noted that the orientation or positional relationship of the instructions such as term "inner", "outside" is base
In orientation or positional relationship shown in the drawings or the invention product using when the orientation or positional relationship usually put, only
It is that for the convenience of describing the present invention and simplifying the description, rather than the device or element of indication or suggestion meaning must have specifically
Orientation is constructed and operated in a specific orientation, therefore is not considered as limiting the invention.In addition, term " first ", " the
Two " etc. are only used for distinguishing description, are not understood to indicate or imply relative importance.
In the description of the present invention, it is also necessary to which explanation is unless specifically defined or limited otherwise, term " setting ",
" connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect
It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can
To be the connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood with concrete condition
Concrete meaning in the present invention.
Fig. 1 is please referred to, the present embodiment provides a kind of excavator hydraulic oil-returning systems 100, including hydraulic oil container 110, and
The main pump 120 and pioneer pump 130 connecting respectively with hydraulic oil container 110, main pump 120 pass through oil feed line 122 and main valve component 140
Connection, main valve component 140 are connected to load 150 and electric-hydraulic proportion flow divider 160 respectively, and pioneer pump 130 passes through pilot control pipe
Road 164 is connected to the Lead side 162 of electric-hydraulic proportion flow divider 160, between electric-hydraulic proportion flow divider 160 and hydraulic oil container 110 also
It is provided with the first oil return line 166 and the second oil return line 168 in parallel, the first oil return line 166 or the second oil return line 168
On be provided with radiator 170, be provided with temperature sensor 112 in hydraulic oil container 110, temperature sensor 112 and electric-hydraulic proportion point
Stream valve 160 is electrically connected with controller 180 respectively, with electro-hydraulic according to the oil temperature signal control for receiving the detection of temperature sensor 112
Proportional diverter valve 160 works.
It should be noted that first, the embodiment of the present invention does not do the specific constructive form of main pump 120 and pioneer pump 130
Concrete restriction.Exemplary, main pump 120 and pioneer pump 130 can be respectively arranged with power source, provide for main pump 120 and pioneer pump 130
Power can also set main pump 120 and pioneer pump 130 to the same power source, while mention for main pump 120 and pioneer pump 130
For power.Motor or engine etc. can be used in the power source, needs as long as can satisfy the power of main pump 120 and pioneer pump 130
It asks.
Second, being not particularly limited to the specific setting form of main valve component 140 for the embodiment of the present invention is exemplary, main
Valve module 140 includes a plurality of oil circuit and the spool etc. being correspondingly arranged, as long as can satisfy fuel feeding and oil return needed for the present embodiment
Demand.
Hydraulic oil is transported to the elder generation of electric-hydraulic proportion flow divider 160 by third, pioneer pump 130 by pilot control pipeline 164
Side 162 is led, controller 180 controls the proportion electro-magnet of Lead side 162 according to the temperature signal of acquisition, so that pioneer pump 130 is defeated
The hydraulic oil of preset ratio out is pushed spool to generate displacement, is adjusted between the spool and valve body of electric-hydraulic proportion flow divider 160 with this
Throttling gap, and then adjust and be back to the recirculating oil quantity of the first oil return line 166 and the second oil return line 168.
Excavator hydraulic oil-returning system 100 provided in an embodiment of the present invention, passes through the main pump connecting with hydraulic oil container 110
120, and the main valve component 140 being connected to main pump 120, so that the hydraulic oil in hydraulic oil container 110 is flowed through main valve component 140.It is logical
The pioneer pump 130 connecting with hydraulic oil container 110 is crossed, and the pilot control pipeline 164 being connected to pioneer pump 130, makes hydraulic oil
Hydraulic oil in case 110 flow to the Lead side 162 of electric-hydraulic proportion flow divider 160 by pilot control pipeline 164.By with main valve
The load 150 and electric-hydraulic proportion flow divider 160 that component 140 is respectively communicated with, make the hydraulic oil in hydraulic oil container 110 pass through main pump
120, load 150 is flowed through using main valve component 140, makes 150 workmanship of load, the hydraulic oil after workmanship is again through main valve component 140
It is back to electric-hydraulic proportion flow divider 160.Pass through the temperature sensor 112 and electric-hydraulic proportion point being electrically connected respectively with controller 180
Valve 160 is flowed, controller 180 is made to control the ratio electromagnetism of Lead side 162 according to the temperature signal of the temperature sensor 112 got
Iron so that pioneer pump 130 export preset ratio hydraulic oil, for adjust electric-hydraulic proportion flow divider 160 spool and valve body it
Between throttling gap, and then adjust and be back to the flow of hydraulic oil on the first oil return line 166 and the second oil return line 168.It is logical
The radiator 170 being arranged on the first oil return line 166 or the second oil return line 168 is crossed, the liquid for being back to hydraulic oil container 110 is made
Pressure oil is restored to required temperature section, realizes the thermal balance of excavator hydraulic oil-returning system 100, can be according to the oil of hydraulic system
Temperature adjusts heat dissipation capacity, promotes the stability of 100 working oil temperature of excavator hydraulic oil-returning system.
As shown in Figure 1, be provided with oil inlet interface 142 on main valve component 140, oil feed line 122 by oil inlet interface 142 with
Main pump 120 is connected to.
Specifically, main pump 120 extracts the hydraulic oil in hydraulic oil container 110, and successively passed by oil feed line 122
It passs, one end of oil feed line 122 is connected with the outlet of main pump 120, and the other end is connected with oil inlet interface 142, for controlling fuel feeding
The flow of 122 hydraulic oil of pipeline and pressure etc..So, make to connect between main valve component 140 and main pump 120 it is easier,
It is convenient that charge oil pressure is controlled, oil feed line is also improved to drive 150 workmanship of load with the pressure value needed for meeting
122 stability.
As shown in Figure 1, being additionally provided with oil out port 144 and the first oil return interface 146, oil out port on main valve component 140
144 and first pass through 150 connection of load between oil return interface 146.
Specifically, oil out port 144 is connect by fuel feeding branch with the oil inlet of load 150, the first oil return interface 146 is logical
Oil return branch is crossed to connect with the oil return opening of load 150.So, so that it may so that circulation path of the load 150 according to hydraulic oil
Operate load 150 according to default working method.
It should be noted that the embodiment of the present invention is not particularly limited the structure type and number of load 150, example
, the number for loading 150 can be set to one, may be set to be multiple, and when being set as multiple, load is 150 settable
Identical structure type may be set to be different structure type, such as hydraulic cylinder or oil motor.
As shown in Figure 1, main valve component 140 further includes the second oil return interface 148, the second oil return interface 148 and electric-hydraulic proportion
Flow divider 160 is connected to, and the second oil return interface 148 is connected to the first oil return interface 146.
Specifically, the second oil return interface 148 is connected to the first oil return interface 146, the second oil return interface 148 passes through oil return pipe
Road is connected to electric-hydraulic proportion flow divider 160, makes to be back to electric-hydraulic proportion flow divider 160, Jin Erke through the hydraulic oil of overload 150
The hydraulic oil of reflux is carried out shunting heat dissipation, the thermal balance performance of excavator pressure system is promoted.
Optionally, as shown in Figure 1, load 150 includes at least one of hydraulic cylinder 152 and hydraulic motor 154.The present invention is real
It applies in example, flexible setting can be carried out according to actual needs, exemplary, load 150 can use hydraulic cylinder 152 and hydraulic horse simultaneously
Up to 154, wherein for driving the mechanical arm of excavator to do stretching motion, hydraulic motor 154 is used for excavator hydraulic cylinder 152
Revolution and running gear provide power.
As shown in Figure 1, excavator hydraulic oil-returning system 100 further includes engine 190, engine 190 is for driving main pump
120 and pioneer pump 130 run.
Specifically, engine 190 can be connect with main pump 120 and 130 V belt translation of pioneer pump respectively, it is main pump 120 and guide
The operation of pump 130 provides power.So, make the operation of main pump 120 and pioneer pump 130 more steady, be also beneficial to reduce
Noise when operation.
Optionally, it can be coaxially disposed between main pump 120 and pioneer pump 130, pass through connection between main pump 120 and pioneer pump 130
Axis device is coaxially connected.So, can make it is more compact between main pump 120 and pioneer pump 130, and be conducive to simplify connection
Mode keeps structure more compact reliable.
As shown in Figure 1, radiator fan 192 is provided on engine 190, the air side of radiator fan 192 and radiator 170
It is corresponding, for 170 auxiliary heat dissipation of radiator.
So, can be conducive to the radiating efficiency of heat radiation device 170 to being back to the hydraulic of hydraulic oil container 110
Oil radiates, and avoids because of the unsmooth raising for leading to oil temperature in hydraulic oil container 110 of radiating.
The embodiment of the present invention also provides a kind of control method of excavator hydraulic oil-returning system 100, comprising:
S100, starting main pump 120 and pioneer pump 130, make the hydraulic oil in hydraulic oil container 110 be delivered to main valve component respectively
140 and electric-hydraulic proportion flow divider 160 Lead side 162.
S200,110 oil temperature signal of hydraulic oil container that temperature sensor 112 detects is received, and is controlled first according to oil temperature signal
The hydraulic oil of 130 output preset ratio of pump is led, the throttling between the spool and valve body for adjusting electric-hydraulic proportion flow divider 160 is empty
Gap.
Specifically, the embodiment of the present invention is not particularly limited the sequencing of every step, and it is exemplary, between S100 and S200
Progress can be synchronized, and when the operation of excavator hydraulic oil-returning system 100, hydraulic oil circuits sequentially in each pipeline, in liquid
In pressure oil cyclic process, each step cooperates, and common cooperation is to realize normal hydraulic circulation.By to throttling hole
It adjusts, changes hydraulic oil by the first oil return line 166 and the second oil return line 168 and be back to 110 flow of hydraulic oil container respectively,
Radiator 170 on first oil return line 166 or the second oil return line 168 radiates to hydraulic oil, passes through feedback regulation to reach
Change the purpose of heat dissipation flow in real time.
It should be noted that controller 180 controls the proportion electro-magnet of Lead side 162 according to oil temperature signal, so that guide
The hydraulic oil of 130 output preset ratio of pump, and then realize the control for exchanging economize on electricity liquid proportional flow divider 160.Wherein, preset ratio
It can be set according to the empirical value in practical operation, which is in corresponding relationship with the oil temperature detected, according to difference
Oil temperature control the flow of the hydraulic oil for flowing through pioneer pump 130, and then push the position of 160 inner spool of electric-hydraulic proportion flow divider
The variation set, to change the The hydraulic oil for being back to the first oil return line 166 and the second oil return line 168.
The control method of excavator hydraulic oil-returning system 100 provided in an embodiment of the present invention is followed by main pump 120 to hydraulic
Ring provide needed for power, by pioneer pump 130, temperature sensor 112 and controller 180, to electric-hydraulic proportion flow divider 160 into
Row control.The extraneous variation of oil temperature is influenced for operating condition and weather etc., can be realized and be dug by modification 180 program parameter of controller
The thermally equilibrated adjustment of pick machine hydraulic oil-returning system 100 makes the hydraulic oil of reflux branch to 166 He of the first oil return line according to oil temperature
Second oil return line 168 avoids the dismounting and change to oil return line to carry out different degrees of heat dissipation, realizes that excavator is hydraulic
The thermal balance of oil return system 100, and then promote the stability of excavator hydraulic oil-returning system 100.
The embodiment of the invention also discloses a kind of excavators, and the as above excavator hydraulic oil-returning system of any one
100.The excavator includes structure identical with the excavator hydraulic oil-returning system 100 in previous embodiment and beneficial effect.It digs
The structure and beneficial effect of pick machine hydraulic oil-returning system 100 are described in detail in the aforementioned embodiment, herein no longer
It repeats.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of excavator hydraulic oil-returning system, which is characterized in that connect including hydraulic oil container, and respectively with the hydraulic oil container
The main pump and pioneer pump connect, the main pump are connected to by oil feed line with main valve component, the main valve component respectively with load and
The connection of electric-hydraulic proportion flow divider, the pioneer pump are connected by the Lead side of pilot control pipeline and the electric-hydraulic proportion flow divider
It is logical, the first oil return line and the second oil return pipe in parallel is additionally provided between the electric-hydraulic proportion flow divider and the hydraulic oil container
It is provided with radiator on road, first oil return line or second oil return line, is provided with temperature in the hydraulic oil container
Sensor, the temperature sensor and the electric-hydraulic proportion flow divider are electrically connected with the controller respectively, with according to receiving
The oil temperature signal of temperature sensor detection controls the electric-hydraulic proportion flow divider work.
2. excavator hydraulic oil-returning system according to claim 1, which is characterized in that be provided on the main valve component into
Oily interface, the oil feed line are connected to by the oil inlet interface with the main pump.
3. excavator hydraulic oil-returning system according to claim 1 or 2, which is characterized in that also set on the main valve component
It is equipped with oil out port and the first oil return interface, is connected between the oil out port and the first oil return interface by the load
It is logical.
4. excavator hydraulic oil-returning system according to claim 3, which is characterized in that be additionally provided on the main valve component
Second oil return interface, the second oil return interface are connected to the electric-hydraulic proportion flow divider, and the second oil return interface and institute
State the first oil return orifice.
5. excavator hydraulic oil-returning system according to claim 3, which is characterized in that the load includes hydraulic cylinder and liquid
At least one of pressure motor.
6. excavator hydraulic oil-returning system according to claim 1, which is characterized in that the excavator hydraulic oil-returning system
It further include engine, the engine is for driving the main pump and guide's pump operation.
7. excavator hydraulic oil-returning system according to claim 6, which is characterized in that the main pump and the pioneer pump are same
Axis setting.
8. excavator hydraulic oil-returning system according to claim 6, which is characterized in that the excavator hydraulic oil-returning system
It further include radiator fan, the air side of the radiator fan is towards the radiator, for the radiator auxiliary heat dissipation.
9. a kind of excavator hydraulic oil-returning system control method characterized by comprising
Start main pump and pioneer pump, the hydraulic oil in hydraulic oil container is made to be delivered to main valve component and electric-hydraulic proportion flow divider respectively
Lead side；
The hydraulic oil container oil temperature signal of temperature sensor detection is received, and the pioneer pump is controlled according to the oil temperature signal and is exported
The hydraulic oil of preset ratio, the throttling gap between spool and valve body for adjusting the electric-hydraulic proportion flow divider.
10. a kind of excavator, which is characterized in that including excavator hydraulic oil-returning system described in claim 1-8 any one.
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| CN201910687658.7A CN110397110A (en) | 2019-07-29 | 2019-07-29 | A kind of excavator hydraulic oil-returning system and its control method, excavator |
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| CN201910687658.7A CN110397110A (en) | 2019-07-29 | 2019-07-29 | A kind of excavator hydraulic oil-returning system and its control method, excavator |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111188810A (en) * | 2020-01-14 | 2020-05-22 | 三一汽车起重机械有限公司 | Hydraulic oil circuit and engineering machinery |
| CN111733916A (en) * | 2020-07-28 | 2020-10-02 | 三一重机有限公司 | Auxiliary adjusting system, excavator and excavating equipment |
| CN112096699A (en) * | 2020-09-17 | 2020-12-18 | 上海三一重机股份有限公司 | Hydraulic oil heat exchange system and excavator |
| CN112648265A (en) * | 2021-01-05 | 2021-04-13 | 中联重科土方机械有限公司 | Heating system for hydraulic system, heating control method and excavator |
| CN112962710A (en) * | 2021-02-20 | 2021-06-15 | 三一重机有限公司 | Hydraulic system of excavator, excavator and power sharing machine group |
| CN113550371A (en) * | 2021-06-22 | 2021-10-26 | 徐州徐工挖掘机械有限公司 | Excavator hydraulic oil warming system and control method thereof |
| CN115434895A (en) * | 2022-09-01 | 2022-12-06 | 中车株洲电力机车有限公司 | Oil temperature control system and method for locomotive and compressor |
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| CN111188810A (en) * | 2020-01-14 | 2020-05-22 | 三一汽车起重机械有限公司 | Hydraulic oil circuit and engineering machinery |
| CN111733916A (en) * | 2020-07-28 | 2020-10-02 | 三一重机有限公司 | Auxiliary adjusting system, excavator and excavating equipment |
| CN112096699A (en) * | 2020-09-17 | 2020-12-18 | 上海三一重机股份有限公司 | Hydraulic oil heat exchange system and excavator |
| CN112648265A (en) * | 2021-01-05 | 2021-04-13 | 中联重科土方机械有限公司 | Heating system for hydraulic system, heating control method and excavator |
| CN112648265B (en) * | 2021-01-05 | 2023-11-21 | 中联重科土方机械有限公司 | Heating system for hydraulic system, heating control method and excavator |
| CN112962710A (en) * | 2021-02-20 | 2021-06-15 | 三一重机有限公司 | Hydraulic system of excavator, excavator and power sharing machine group |
| CN113550371A (en) * | 2021-06-22 | 2021-10-26 | 徐州徐工挖掘机械有限公司 | Excavator hydraulic oil warming system and control method thereof |
| CN115434895A (en) * | 2022-09-01 | 2022-12-06 | 中车株洲电力机车有限公司 | Oil temperature control system and method for locomotive and compressor |
| CN115434895B (en) * | 2022-09-01 | 2024-02-06 | 中车株洲电力机车有限公司 | Locomotive and compressor oil temperature control system and method |
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