CN103591087A - Temperature control device and control method of pumping hydraulic system and engineering machinery - Google Patents
Temperature control device and control method of pumping hydraulic system and engineering machinery Download PDFInfo
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- CN103591087A CN103591087A CN201310578330.4A CN201310578330A CN103591087A CN 103591087 A CN103591087 A CN 103591087A CN 201310578330 A CN201310578330 A CN 201310578330A CN 103591087 A CN103591087 A CN 103591087A
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000005086 pumping Methods 0.000 title abstract description 16
- 239000012530 fluid Substances 0.000 claims description 55
- 238000006073 displacement reaction Methods 0.000 claims description 16
- 238000001514 detection method Methods 0.000 claims description 15
- 230000000052 comparative effect Effects 0.000 claims description 4
- 238000012360 testing method Methods 0.000 claims description 4
- 239000010720 hydraulic oil Substances 0.000 abstract description 15
- 239000002699 waste material Substances 0.000 abstract description 2
- 239000003921 oil Substances 0.000 description 50
- 230000001276 controlling effect Effects 0.000 description 8
- 238000001816 cooling Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 238000013459 approach Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
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Abstract
The invention provides a temperature control device and a temperature control method for a pumping hydraulic system and engineering machinery. The temperature control method of the pumping hydraulic system comprises the following steps: determining whether the pumping hydraulic system is in an idle working state; when the pumping hydraulic system is in an idling working state, detecting the temperature of hydraulic oil of the pumping hydraulic system; and adjusting the discharge capacity of the hydraulic pump according to the detected temperature of the hydraulic oil. According to the temperature control method of the pumping hydraulic system, the waste of system power can be effectively reduced, and the working temperature of the hydraulic system is ensured.
Description
Technical field
The present invention relates to pumping machine field, in particular to a kind of temperature control apparatus of hydraulic system of pump and controlling method, engineering machinery.
Background technique
Concrete pump is because overall structure limits, and tank design is conventionally less, and concrete pump particularly Diesel engine pump operating mode is severe, Hydraulic System Fever is relatively high.In the prior art, when hydraulic system is in idling work state lower time, the proportion electro-magnet of controlling discharge of main pump output obtains electric, and size of current is identical during with normal pumping, and this control mode has following two defects:
1) when hydraulic system temperature is low, main pump output fluid is by the meta oil sump tank of selector valve, and flow through pipeline and element of fluid exists the pressure loss, if now main pump still has larger output discharge capacity, causes to a certain extent power dissipation.
2), when hydraulic system temperature is high, during due to the normal pumping construction of concrete pump, may be operated in any gear, as when constructing below 5 grades, now swash plate does not have standard-sized sheet, main pump does not have delivery output, causes by the fluid amount of radiator on the low sidely, and during hydraulic system idling, the temperature range of decrease is little.
Summary of the invention
The present invention aims to provide a kind of temperature control apparatus of hydraulic system of pump and controlling method, engineering machinery, can effectively reduce system power waste, and guarantee hydraulic work system temperature simultaneously.
To achieve these goals, according to an aspect of the present invention, provide a kind of temperature control method of hydraulic system of pump, having comprised: determined that whether hydraulic system of pump is in idling work state; When hydraulic system of pump is during in idling work state, detect the hydraulic fluid temperature of hydraulic system of pump; According to detected hydraulic fluid temperature regulator solution, press pump delivery.
Further, according to detected hydraulic fluid temperature regulator solution, press the step of pump delivery to comprise: when hydraulic fluid temperature is during higher than desired temperature, to increase or keep the output discharge capacity of oil hydraulic pump; When hydraulic fluid temperature is during lower than desired temperature, reduce the output discharge capacity of oil hydraulic pump or keep the minimum output discharge capacity of oil hydraulic pump.
Further, when hydraulic fluid temperature is during higher than desired temperature, the step that increases the output discharge capacity of oil hydraulic pump comprises: when hydraulic fluid temperature is during higher than desired temperature, detect now hydraulic pressure pump delivery gear; When if discharge capacity gear is positioned at high-order gear, controls oil hydraulic pump and keep output discharge capacity now; When if discharge capacity gear is positioned at low level gear, increase the output discharge capacity of oil hydraulic pump to maximum output discharge capacity.
Further, when hydraulic fluid temperature is during lower than desired temperature, the step that reduces the output discharge capacity of oil hydraulic pump comprises: reduce the output discharge capacity of oil hydraulic pump to minimum output discharge capacity.
Further, hydraulic system of pump is open type hydraulic system of pump.
According to a further aspect in the invention, provide a kind of temperature control apparatus of hydraulic system of pump, having comprised: working state detection device, for determining that whether hydraulic system of pump is in idling work state; Temperature-detecting device, for detection of the hydraulic fluid temperature of hydraulic system of pump; Controller, the hydraulic fluid temperature regulator solution detecting according to temperature-detecting device is pressed pump delivery.
Further, controller is built-in with desired temperature, and temperature control apparatus also comprises comparer, and comparer is used for comparing the size of hydraulic fluid temperature and desired temperature, and comparative result is delivered to controller.
Further, temperature control apparatus also comprises discharge capacity gear detection device, and discharge capacity gear detection device is for detection of hydraulic system of pump discharge capacity gear, and testing result is delivered to controller.
Further, oil hydraulic pump is unidirectional variable displacement pump.
According to a further aspect in the invention, provide a kind of engineering machinery, comprised temperature control apparatus, this temperature control apparatus is the temperature control apparatus of above-mentioned hydraulic system of pump.
Apply technological scheme of the present invention, the temperature control method of hydraulic system of pump comprises: determine that whether hydraulic system of pump is in idling work state; When hydraulic system of pump is during in idling work state, detect the hydraulic fluid temperature of hydraulic system of pump; According to detected hydraulic fluid temperature regulator solution, press pump delivery.By the controlling method of this programme, can at hydraulic system of pump during in idling work state, according to hydraulic fluid temperature, come regulator solution to press pump delivery, while making the temperature of hydraulic oil lower, can by reducing the mode of discharge capacity, reduce the power consumption of system, reach the object of energy-saving consumption-reducing; When the temperature of hydraulic oil is higher, can by increasing the mode of discharge capacity, improve the heat dissipation rate of hydraulic oil, reduce the operating temperature of system, thus the working life of improving hydraulic element.
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 shows the control flow chart of the temperature control apparatus of hydraulic system of pump according to an embodiment of the invention;
Fig. 2 shows the structure principle chart of temperature control apparatus according to an embodiment of the invention;
Fig. 3 shows the structural representation of hydraulic system of pump according to an embodiment of the invention;
Fig. 4 shows the Energy Saving Control schematic diagram of temperature control apparatus when idling work state according to an embodiment of the invention; And
Fig. 5 shows the cooling of temperature control apparatus when idling work state according to an embodiment of the invention and controls schematic diagram.
Reference character: 1, oil hydraulic pump; 2, semirotary pump; 3, displacement valves; 4, relief valve; 5, the first solenoid directional control valve; 6, the first pilot operated directional control valve; 7, pumping cylinder; 8, the second solenoid directional control valve; 9, the second pilot operated directional control valve; 10, tilt cylinder.
Embodiment
Hereinafter with reference to accompanying drawing, also describe the present invention in detail in conjunction with the embodiments.It should be noted that, in the situation that not conflicting, embodiment and the feature in embodiment in the application can combine mutually.
In the present embodiment, hydraulic pressure pump delivery gear is divided into two gears of height, if for example discharge capacity gear is divided into 5 gears, 1,2 grade is low level shelves, and 3,4,5 grades is high-order gear, if discharge capacity gear is divided into 4 grades, 1,2 grade is low level shelves, 3,4 grades is high-order gear, and gear is herein divided the general understanding based on those skilled in the art, can by operator, be delimited voluntarily according to actual actual conditions.
As shown in Figure 1, according to embodiments of the invention, the temperature control method of hydraulic system of pump comprises: determine that whether hydraulic system of pump is in idling work state; When hydraulic system of pump is during in idling work state, detect the hydraulic fluid temperature of hydraulic system of pump; According to the discharge capacity of detected hydraulic fluid temperature regulator solution press pump 1.
When hydraulic system of pump is worked, temperature control apparatus can confirm that hydraulic system of pump is after idling work state, controller carrys out the discharge capacity of regulator solution press pump 1 according to hydraulic fluid temperature, while making the temperature of hydraulic oil lower, can by reducing the mode of discharge capacity, reduce the power consumption of system, reach the object of energy-saving consumption-reducing; When the temperature of hydraulic oil is higher, can by increasing the mode of discharge capacity, improve the heat dissipation rate of hydraulic oil, reduce the operating temperature of system, thus the working life of improving hydraulic element.
The described step according to the discharge capacity of detected hydraulic fluid temperature regulator solution press pump 1 comprises: when hydraulic fluid temperature is during higher than desired temperature, what controller sent Displacement Regulation controls signal to displacement valves 3, to increase or to keep the output discharge capacity of oil hydraulic pump 1; When hydraulic fluid temperature is during lower than desired temperature, what controller sent Displacement Regulation controls signal to displacement valves 3, to reduce or to keep the output discharge capacity of oil hydraulic pump 1, preferably, when increasing the output discharge capacity of oil hydraulic pump 1, the output discharge capacity of oil hydraulic pump 1 is finally adjusted to maximum output discharge capacity; When reducing the output discharge capacity of oil hydraulic pump 1, the output discharge capacity of oil hydraulic pump 1 is finally adjusted to minimum output discharge capacity.When increasing the output discharge capacity of oil hydraulic pump 1, if the output discharge capacity of oil hydraulic pump 1 detected, be adjusted to maximum, keep current output discharge capacity; When reducing the output discharge capacity of oil hydraulic pump 1, if the output discharge capacity of oil hydraulic pump 1 detected, be adjusted to minimum, keep current output discharge capacity.
When hydraulic fluid temperature is during higher than desired temperature, need to reduce hydraulic fluid temperature, adverse effect hydraulic element being caused to reduce hydraulic fluid temperature, extend the working life of hydraulic element, and adopt the mode of the output discharge capacity that increases oil hydraulic pump 1, just can tune up swash plate aperture, make the larger discharge capacity of oil hydraulic pump 1 output, can increase the hydraulic fluid flow rate by radiator, improve the heat dissipation rate of hydraulic oil, realize fast the cooling of hydraulic oil.When 1 delivery when output of oil hydraulic pump, the fluid amount by radiator reaches maximum value, and now hydraulic oil heat dissipation rate is the fastest, can play the effect to whole hydraulic system fast cooling.
When hydraulic fluid temperature is during lower than desired temperature, because hydraulic fluid temperature is now reduced under suitable temperature, can not affect greatly hydraulic element, therefore now can reduce the output discharge capacity of oil hydraulic pump 1, reduce the power stage of oil hydraulic pump 1, reduce power dissipation.When the power stage of oil hydraulic pump 1 is reduced to hour, by hydraulic oil, pass through in the process of meta oil sump tank of selector valve, flow through also corresponding the reducing of the pressure loss of pipeline and element of fluid, the pressure loss while making hydraulic system idling work is also reduced to minimum, thereby can avoid to the full extent power dissipation.By detecting the real time temperature of hydraulic oil, carry out the mode of real-time monitoring oil hydraulic pump 1 discharge capacity, can effectively improve the intellectuality of temperature control apparatus, under suitable state, select suitable regulative mode, with the loss of at utmost low reduction hydraulic element, and reduce the power dissipation of hydraulic system of pump.
Above-mentioned desired temperature can be set by operator voluntarily according to Environmental Conditions etc., and preferably, this desired temperature capable of regulating, to make this temperature control apparatus have better applicability.
At hydraulic fluid temperature, during higher than desired temperature, the step that increases the output discharge capacity of oil hydraulic pump 1 specifically comprises: when hydraulic fluid temperature is during higher than desired temperature, detect the now discharge capacity gear of oil hydraulic pump 1; When if discharge capacity gear is positioned at high-order gear, control the output discharge capacity that oil hydraulic pump 1 keeps now; When if discharge capacity gear is positioned at low level gear, increase the output discharge capacity of oil hydraulic pump 1 to maximum output discharge capacity.When discharge capacity is positioned at high tap position, now the discharge capacity of oil hydraulic pump 1 has reached large discharge capacity, therefore can, to the row adjustment again of the output discharge capacity of oil hydraulic pump 1, just can realize fast the cooling of hydraulic oil.When discharge capacity is positioned at low-grade location, because the discharge capacity of oil hydraulic pump 1 is now less, in order farthest to reduce the temperature of hydraulic system of pump, need to control the output discharge capacity of oil hydraulic pump 1 to maximum value, thereby make oil hydraulic pump 1 delivery output, while increasing idling by the hydraulic fluid flow rate of radiator.
In the present embodiment, controller is by regulating the mode of electric current to regulate displacement valves 3, with the output discharge capacity of regulator solution press pump 1.This output discharge capacity also can regulate by modes such as regulating voltages.
The hydraulic system of pump of the present embodiment is for example open type hydraulic system of pump.
As shown in Figure 2, according to embodiments of the invention, the temperature control apparatus of hydraulic system of pump comprises: working state detection device, for determining that whether hydraulic system of pump is in idling work state; Temperature-detecting device, for detection of the hydraulic fluid temperature of described hydraulic system of pump; And controller, the hydraulic fluid temperature detecting according to described temperature-detecting device regulates described hydraulic pressure pump delivery.Temperature-detecting device comprises the oil temperature sensor that can detect hydraulic fluid temperature.
Described controller is built-in with desired temperature, described temperature control apparatus also comprises comparer, the real-time described hydraulic fluid temperature that described comparer obtains for comparison oil temperature sensor and the size of described desired temperature, and comparative result is delivered to described controller, controller is controlled hydraulic system of pump by above-mentioned controlling method according to this comparative result.
Described temperature control apparatus also comprises discharge capacity gear detection device, described discharge capacity gear detection device is for detection of hydraulic system of pump discharge capacity gear, and testing result is delivered to described controller, controller is controlled displacement valves 3 by above-mentioned controlling method according to testing result.
In the present embodiment, described oil hydraulic pump is unidirectional variable displacement pump, and the temperature control apparatus of the present embodiment also goes for the variable displacement pump of other type.
In conjunction with shown in Figure 3, the hydraulic system of pump of concrete pump of take is below illustrated the working procedure of hydraulic system of pump of the present invention as example:
When starting pumping, a side electromagnet of the first solenoid directional control valve 5, the second solenoid directional control valve 8 obtains electric, and pumping cylinder 7, tilt cylinder 10 are in positive pump state.At this moment, an oil cylinder in pumping cylinder 7 stretches out, another oil cylinder is return, when the cylinder movement stretching out to the end, encounter after the approach switch being contained on oil cylinder, approach switch sender is controlled the first solenoid directional control valve 5, the second solenoid directional control valve 8 commutations, and the first pilot operated directional control valve 6 is controlled by the first solenoid directional control valve 5 and realized commutation, and controls 7 commutations of pumping cylinder; The second pilot operated directional control valve 9 is controlled by the second solenoid directional control valve 8 and is realized commutation, and controls tilt cylinder 10 commutations, realizes pumping state and switches; So circulation, concrete is pumped continuously, and the speed of concrete conveyance speed is determined by the size of current of the displacement valves 3 on oil hydraulic pump 1.When pressing stop button, concrete pump transfers idling work state to, and motor is with compared with slow-speed of revolution running, the whole dead electricity of electromagnet of the first solenoid directional control valve 5, the second solenoid directional control valve 8 now, and the first pilot operated directional control valve 6 and the second pilot operated directional control valve 9 all return meta.Now displacement valves 3 still electric.Semirotary pump 2 in figure is for controlling oscillatory valve work, and relief valve 4 is for limiting the hydraulic fluid pressure of oil hydraulic pump 1 output.
When detecting after hydraulic system of pump enters into idling work state, temperature control apparatus is started working, and the hydraulic fluid temperature obtaining according to temperature transducer is controlled displacement valves 3, at hydraulic fluid temperature during higher than desired temperature, controller regulates controls electric current to increase the output discharge capacity of oil hydraulic pump 1, so that hydraulic oil is lowered the temperature; When hydraulic fluid temperature being detected, be reduced to desired temperature when following, just by controller, regulate and control output discharge capacity that electric current reduces oil hydraulic pump 1 to minimum, with sinking low-power consumption at utmost.
From Fig. 4 and Fig. 5, can find out, when the hydraulic fluid temperature of hydraulic system of pump is during lower than desired temperature, temperature control apparatus is in Energy Saving Control state, and the control electric current of displacement valves 3 remains on minimum state, has reduced significantly power dissipation; When the hydraulic fluid temperature of hydraulic system of pump is during higher than desired temperature, temperature control apparatus is in the idling state of a control of lowering the temperature, and the control electric current of displacement valves 3 remains on maximum rating, with the bulk temperature of fast reducing hydraulic system of pump.
According to embodiments of the invention, engineering machinery comprises temperature control apparatus, and this temperature control apparatus is the temperature control apparatus of above-mentioned hydraulic system of pump.
As can be seen from the above description, the above embodiments of the present invention have realized following technique effect:
1, when hydraulic system of pump temperature is lower, and when idling, reduce the control electric current of hydraulic pump discharge, make oil hydraulic pump with the work of minimum output discharge capacity, cpable of lowering power loss, reaches more energy-conservation object.
2, when hydraulic system of pump temperature is higher, and when idling, improve the control electric current of hydraulic pump discharge, make the output of oil hydraulic pump delivery, can farthest reduce the temperature of hydraulic system, thus the working life of improving hydraulic element.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a temperature control method for hydraulic system of pump, is characterized in that, comprising:
Determine that whether described hydraulic system of pump is in idling work state;
When described hydraulic system of pump is during in idling work state, detect the hydraulic fluid temperature of described hydraulic system of pump;
According to detected described hydraulic fluid temperature regulator solution, press pump delivery.
2. temperature control method according to claim 1, is characterized in that, describedly according to detected described hydraulic fluid temperature, regulates the step of described hydraulic pressure pump delivery to comprise:
When described hydraulic fluid temperature is during higher than desired temperature, increase or keep the output discharge capacity of described oil hydraulic pump;
When described hydraulic fluid temperature is during lower than described desired temperature, reduce the output discharge capacity of described oil hydraulic pump or keep the minimum output discharge capacity of described oil hydraulic pump.
3. temperature control method according to claim 2, is characterized in that, described when described hydraulic fluid temperature is during higher than described desired temperature, the step that increases the output discharge capacity of described oil hydraulic pump comprises:
When described hydraulic fluid temperature is during higher than described desired temperature, detect now described hydraulic pressure pump delivery gear;
When if described discharge capacity gear is positioned at high-order gear, controls described oil hydraulic pump and keep output discharge capacity now;
When if described discharge capacity gear is positioned at low level gear, increase the output discharge capacity of described oil hydraulic pump to maximum output discharge capacity.
4. temperature control method according to claim 2, is characterized in that, described when described hydraulic fluid temperature is during lower than described desired temperature, the step that reduces the output discharge capacity of described oil hydraulic pump comprises:
Reduce the output discharge capacity of described oil hydraulic pump to minimum output discharge capacity.
5. according to the temperature control method described in any one in claim 1 to 4, it is characterized in that, described hydraulic system of pump is open type hydraulic system of pump.
6. a temperature control apparatus for hydraulic system of pump, is characterized in that, comprising:
Working state detection device, for determining that whether hydraulic system of pump is in idling work state;
Temperature-detecting device, for detection of the hydraulic fluid temperature of described hydraulic system of pump;
Controller, the hydraulic fluid temperature regulator solution detecting according to described temperature-detecting device is pressed pump delivery.
7. temperature control apparatus according to claim 6, it is characterized in that, described controller is built-in with desired temperature, described temperature control apparatus also comprises comparer, described comparer is used for the size of more described hydraulic fluid temperature and described desired temperature, and comparative result is delivered to described controller.
8. temperature control apparatus according to claim 7, it is characterized in that, described temperature control apparatus also comprises discharge capacity gear detection device, and described discharge capacity gear detection device is for detection of described hydraulic system of pump discharge capacity gear, and testing result is delivered to described controller.
9. temperature control apparatus according to claim 6, is characterized in that, described oil hydraulic pump is unidirectional variable displacement pump.
10. an engineering machinery, comprises temperature control apparatus, it is characterized in that, described temperature control apparatus is the temperature control apparatus of the hydraulic system of pump described in any one in claim 6 to 9.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108916160A (en) * | 2018-09-05 | 2018-11-30 | 芜湖中意液压科技股份有限责任公司 | Oil temperature automatic control system when a kind of tilt cylinder motor detecting |
| CN111322280A (en) * | 2020-03-04 | 2020-06-23 | 徐州徐工施维英机械有限公司 | Double-valve-core full-hydraulic-control integrated pumping reversing system and method |
| CN111365309A (en) * | 2018-12-25 | 2020-07-03 | 青岛九合重工机械有限公司 | Novel arm support pump truck oscillating cylinder hydraulic system and concrete pump truck |
| CN111997137A (en) * | 2020-08-25 | 2020-11-27 | 上海华兴数字科技有限公司 | Excavator control method and device, storage medium and excavator |
| WO2022068661A1 (en) * | 2020-09-30 | 2022-04-07 | 中联重科股份有限公司 | Pressure-compensation hydraulic pump, rotation speed control system and control method, and engineering machinery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2022068661A1 (en) * | 2020-09-30 | 2022-04-07 | 中联重科股份有限公司 | Pressure-compensation hydraulic pump, rotation speed control system and control method, and engineering machinery |
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