CN105465106A - Hydraulic cooling system, control method and crane - Google Patents
Hydraulic cooling system, control method and crane Download PDFInfo
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- CN105465106A CN105465106A CN201410550385.9A CN201410550385A CN105465106A CN 105465106 A CN105465106 A CN 105465106A CN 201410550385 A CN201410550385 A CN 201410550385A CN 105465106 A CN105465106 A CN 105465106A
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Abstract
The invention relates to a hydraulic cooling system, a control method and a crane. The hydraulic cooling system comprises a hydraulic oil pump, a hydraulic oil tank, a hydraulic motor, a cooling fan and an air cooler arranged in a hydraulic oil passage to be cooled. The hydraulic cooling system further comprises an electric proportional flow valve and a temperature sensor, wherein the temperature sensor is arranged on the hydraulic oil passage to be cooled and can detect the oil temperature in the hydraulic oil passage to be cooled; the electric proportional flow valve is arranged on an oil inlet passage of the hydraulic motor and can control the flow of hydraulic oil entering the hydraulic motor according to the oil temperature detected by the temperature sensor, and thus the rotating speed of the hydraulic motor is adaptive to the oil temperature of the hydraulic oil passage to be cooled. The cooling efficiency of the hydraulic cooling system can be improved, and the safe reliability of the system is improved.
Description
Technical field
The present invention relates to field of hydraulic control, particularly relate to a kind of hydraulic radiating, controlling method and hoist.
Background technique
Four big-movements of current hoist (hoist, stretch, luffing and revolution) all adopt hydraulic transmission, and due to the feature of hydraulic transmission itself and the working environment of its rather harsh and operating mode, it is normally inadequate that the heat that hydraulic system produces depends merely on dispersing of hydraulic oil container, hydraulic element and tube surface, and effective control of hydraulic oil temperature is the basic premise that hydraulic system normally works, therefore special cooling unit is set in hydraulic system and cooling circuit is indispensable important step.
Current hoist has the radiation system adopting fluid motor-driven, as shown in Figure 1.This kind of radiation system adopts special fan a1 to carry out pressure to the air cooler a2 be arranged on oil return circuit T and accelerates heat exchange, fan a1 is driven by oil hydraulic motor a3, and oil hydraulic motor a3 is by quantitative gear pump a4 fuel feeding, the hydraulic oil that quantitative gear pump a4 provides directly enters oil hydraulic motor a3 by Sandwich plate valve a5.Oil hydraulic motor a3 drives the heat dissipating capacity of radiation system in direct ratio relevant to the rotating speed of oil hydraulic motor a3, and rotating speed is higher, and heat dissipating capacity is larger.And the rotating speed of oil hydraulic motor a3 is determined by the flow of oil hydraulic motor a3, in the radiation system that current hoist adopts, the flow that quantitative gear pump a4 provides to oil hydraulic motor a3 can not regulate, this causes when engine speed raises, pump duty increases, flow and the rotating speed of corresponding oil hydraulic motor a3 all increase, and drive fan a1 to accelerate heat exchange, oil temperature is declined.
The radiation system of current fluid motor-driven also exists following defect:
1, in hydraulic work system, no matter how high hydraulic oil oil temperature is, oil hydraulic motor is all in the state of running up, if engine speed is too high, cause oil hydraulic motor flow excessive, then may cause the danger of oil hydraulic motor overspeed operation, and then oil hydraulic motor is caused damage, affect its working life; And when hydraulic oil oil temperature is lower, oil hydraulic motor still runs up, then cause the waste of system capacity.
2, when excessive by the flow pressure-difference of air cooler a2, hydraulic oil may be greater than heat dissipating capacity by heating value during air cooler a2, thus makes radiation system cannot be reached for the object of hydraulic oil cooling.
Summary of the invention
The object of the invention is to propose a kind of hydraulic radiating, controlling method and hoist, can radiating efficiency be improved, improve the safety reliability of system.
For achieving the above object, the invention provides a kind of hydraulic radiating, comprise: hydraulic-pressure pump, hydraulic oil container, oil hydraulic motor, cooling fan and the air cooler be arranged in hydraulic circuit to be dispelled the heat, described hydraulic-pressure pump is described oil hydraulic motor fuel feeding, drive described cooling fan to rotate to make described oil hydraulic motor and wind-cooling heat dissipating is carried out to the hydraulic oil by described air cooler, wherein also comprise: electric proportional flow control valve and temperature transducer, on hydraulic circuit to be dispelled the heat described in wherein said temperature transducer is arranged on, oil temperature in hydraulic circuit described to be dispelled the heat can be detected, described electric proportional flow control valve is arranged on the oil-feed oil circuit of described oil hydraulic motor, the Oil-temperature control that can detect according to described temperature transducer enters into the hydraulic fluid flow rate of described oil hydraulic motor, to make the oil temperature fit of the rotating speed of described oil hydraulic motor and hydraulic circuit described to be dispelled the heat.
Further, also comprise the bypass valve in parallel with described air cooler, described bypass valve can the oil pressure difference between the entrance and exit of described air cooler be opened when exceeding preset pressure, and the hydraulic oil in hydraulic circuit to be dispelled the heat described in making directly flows back to described hydraulic oil container by described bypass valve.
Further, hydraulic circuit to be dispelled the heat described in is main oil circuit.
Further, repairing oil circuit is also provided with between the filler opening and the outlet of described air cooler of described oil hydraulic motor, described repairing oil circuit is provided with safety valve, described safety valve can need to open during repairing at described oil hydraulic motor, makes described oil hydraulic motor obtain hydraulic oil by described repairing oil circuit from described main oil circuit.
Further, the point for measuring temperature of described temperature transducer arranges the entry position of the return oil filter on described main oil circuit.
Further, described electric proportional flow control valve adopts electric proportional velocity regulating valve, described electric proportional velocity regulating valve has the by-pass port be directly communicated with described hydraulic oil container, to make the hydraulic oil entering into described electric proportional velocity regulating valve directly flow back to described hydraulic oil container by described by-pass port when the throttle valve in described electric proportional velocity regulating valve cuts out.
For achieving the above object, present invention also offers a kind of hydraulic pressure cooling control method based on aforementioned hydraulic radiation system, comprising:
The oil temperature that temperature transducer is treated in the hydraulic circuit of heat radiation detects;
Electricity proportional flow control valve enters into the hydraulic fluid flow rate of oil hydraulic motor according to the Oil-temperature control that described temperature transducer detects, to make the oil temperature fit of the rotating speed of described oil hydraulic motor and hydraulic circuit described to be dispelled the heat.
Further, described hydraulic radiating also comprises the bypass valve in parallel with air cooler, described method comprises further: open described bypass valve when the oil pressure difference between the entrance and exit of described air cooler exceedes preset pressure, the hydraulic oil in hydraulic circuit to be dispelled the heat described in making directly flows back to hydraulic oil container by described bypass valve.
Further, hydraulic circuit described to be dispelled the heat is main oil circuit, and repairing oil circuit is also provided with between the filler opening and the outlet of described air cooler of oil hydraulic motor, described repairing oil circuit is provided with safety valve, described method comprises further: when described oil hydraulic motor needs to open described safety valve during repairing, makes described oil hydraulic motor obtain hydraulic oil by described repairing oil circuit from described main oil circuit.
For achieving the above object, present invention also offers a kind of hoist, comprise aforesaid hydraulic radiating.
Based on technique scheme, the present invention detects the oil temperature height treating heat radiation oil circuit by temperature transducer, and control according to oil temperature the hydraulic fluid flow rate entering into oil hydraulic motor by electric proportional flow control valve, to make rotating speed and the oil temperature fit of oil hydraulic motor, the flow of oil hydraulic motor so just can be reduced when oil temperature is lower, reduce the rotating speed of cooling fan, to save energy consumption, and the flow of oil hydraulic motor is increased when oil temperature is higher, improve the rotating speed of cooling fan, to obtain better radiating effect, and then reach the effect of the radiating efficiency improving hydraulic radiating, it also avoid existing radiation system causes oil hydraulic motor overspeed operation at low temperatures phenomenon because engine speed is higher simultaneously, improve the safety reliability of hydraulic radiating.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the existing hydraulic principle schematic diagram by the radiation system of fluid motor-driven.
Fig. 2 is the hydraulic principle schematic diagram of an embodiment of hydraulic radiating of the present invention.
Fig. 3 is the hydraulic principle schematic diagram of another embodiment of hydraulic radiating of the present invention.
Fig. 4 is the hydraulic principle schematic diagram of an embodiment again of hydraulic radiating of the present invention.
Embodiment
Below by drawings and Examples, technological scheme of the present invention is described in further detail.
As shown in Figure 2, be the hydraulic principle schematic diagram of an embodiment of hydraulic radiating of the present invention.In the present embodiment, hydraulic radiating comprises: hydraulic-pressure pump 1, hydraulic oil container 10, oil hydraulic motor 2, cooling fan 3 and the air cooler 4 be arranged in hydraulic circuit to be dispelled the heat.Wherein, hydraulic-pressure pump 1 is oil hydraulic motor 2 fuel feeding, and to make oil hydraulic motor 2 drive cooling fan 3 to rotate, and cooling fan 3 rotates the cooling air brought can carry out wind-cooling heat dissipating to the hydraulic oil by air cooler.
In order to realize the intelligent control of hydraulic pressure heat radiation, electric proportional flow control valve 6 and temperature transducer 5 can be added in hydraulic radiating, wherein temperature transducer 5 is arranged on hydraulic circuit to be dispelled the heat, the oil temperature can treated in the hydraulic circuit of heat radiation detects, and electric proportional flow control valve 6 is arranged on the oil-feed oil circuit of oil hydraulic motor 2, the Oil-temperature control that can detect according to temperature transducer 5 enters into the hydraulic fluid flow rate of oil hydraulic motor 2, to make the oil temperature fit of the rotating speed of oil hydraulic motor 2 and hydraulic circuit to be dispelled the heat.
Electricity proportional flow control valve is a kind of hydraulic element that can be changed the valve opening of its internal restriction valve by the size controlling to apply electric current, can be able to be increased by the flow of the hydraulic oil of this electric proportional flow control valve when intensifying valve aperture, the hydraulic fluid flow rate entering into oil hydraulic motor will be made when being reflected in hydraulic radiating to increase, drive hydraulic motor rotary speed improves, and increases radiating effect; Otherwise minimizing valve opening, then can make to be reduced by the flow of the hydraulic oil of this electric proportional flow control valve, the hydraulic fluid flow rate entering into oil hydraulic motor will be made when being reflected in hydraulic radiating to reduce, drive hydraulic motor rotary speed to reduce, weaken radiating effect, but also save energy consumption.
Because electric proportional flow control valve can be carried out the control of valve opening by applying electric current, therefore nonshared control unit or control system is utilized just itself and the temperature transducer being used for detecting oil temperature can be connected, realize intelligentized control procedure, the oil temperature signal being about to record converts the current signal controlling electric proportional flow control valve to, with make oil hydraulic motor rotating speed can with oil temperature fit.
What electric proportional flow control valve 6 adopted shown in figure 2 is electric proportional velocity regulating valve, as we can see from the figure, this electric proportional velocity regulating valve has the by-pass port be directly communicated with hydraulic oil container 10, when the throttle valve in electric proportional velocity regulating valve cuts out, the hydraulic oil entering into electric proportional velocity regulating valve just directly can flow back to hydraulic oil container by by-pass port.So just can the oil temperature of oil circuit to be dispelled the heat lower and without the need to heat radiation when, the hydraulic oil that hydraulic-pressure pump is pumped directly flows back to fuel tank, and no longer flows into oil hydraulic motor to drive cooling fan and rotate, thus reaches good energy-saving effect.
Electricity proportional velocity regulating valve can select existing hydraulic element, and this hydraulic element can not only regulate flow automatically according to the control signal of input, and its flow can not be subject to the impact of induced pressure fluctuation substantially.
In addition, hydraulic radiating of the present invention can be applicable to the various oil circuit needing heat radiation, for engineering machinery such as hoists, for avoiding the high oil temperature in hydraulic oil container, air cooler 4 can be set on main oil circuit T, accordingly, temperature transducer 5 can be arranged on the entry position of the return oil filter 9 before entering hydraulic oil container 10.
As shown in Figure 3, be the hydraulic principle schematic diagram of another embodiment of hydraulic radiating of the present invention.Compared with a upper embodiment, the hydraulic radiating of the present embodiment also comprises the bypass valve 7 in parallel with air cooler 4, bypass valve 7 the oil pressure difference between the entrance and exit of air cooler 4 can exceed preset pressure (4bar such as shown in Fig. 3) time and opens, and makes the hydraulic oil in hydraulic circuit (shown in Fig. 3 is main oil circuit T) to be dispelled the heat directly flow back to hydraulic oil container 10 by bypass valve 7.Hydraulic oil so just can be avoided when air cooler 4 to cause heating because of pressure reduction is excessive, and then the problem of the object utilizing radiation system cooling oil cannot be realized.
The setting of the preset pressure of bypass valve 7 can be determined by the magnitude relationship of the heating value of test air cooler 4 under different pressure reduction and heat dissipating capacity, is not limited to the 4bar shown in Fig. 3 embodiment.
As shown in Figure 4, be the hydraulic principle schematic diagram of an embodiment again of hydraulic radiating of the present invention.Compared with a upper embodiment, the present embodiment is also provided with repairing oil circuit between the filler opening and the outlet of air cooler 4 of oil hydraulic motor 2, repairing oil circuit is provided with safety valve 8, safety valve 8 can need to open during repairing at oil hydraulic motor 2, makes oil hydraulic motor 2 obtain hydraulic oil by repairing oil circuit from main oil circuit T.
When hydraulic-pressure pump quits work or electric proportional velocity regulating valve is closed suddenly; oil hydraulic motor continues due to inertia to rotate; hydraulic oil now in main oil circuit T just can flow into oil hydraulic motor by this safety valve; repairing is carried out to oil hydraulic motor; to prevent oil hydraulic motor from occurring emptying phenomenon, thus achieve the safety protection to oil hydraulic motor.
Based on above-mentioned various hydraulic radiating embodiment, following hydraulic pressure cooling control method can be implemented, comprising:
The oil temperature that temperature transducer is treated in the hydraulic circuit of heat radiation detects;
Electricity proportional flow control valve enters into the hydraulic fluid flow rate of oil hydraulic motor according to the Oil-temperature control that described temperature transducer detects, to make the oil temperature fit of the rotating speed of described oil hydraulic motor and hydraulic circuit described to be dispelled the heat.
In another embodiment of the method, hydraulic radiating also comprises the bypass valve in parallel with air cooler, then method comprises further: open described bypass valve when the oil pressure difference between the entrance and exit of described air cooler exceedes preset pressure, the hydraulic oil in hydraulic circuit to be dispelled the heat described in making directly flows back to hydraulic oil container by described bypass valve.
In another embodiment of the method, hydraulic circuit to be dispelled the heat is main oil circuit, and repairing oil circuit is also provided with between the filler opening and the outlet of described air cooler of oil hydraulic motor, described repairing oil circuit is provided with safety valve, then the method comprises further: when described oil hydraulic motor needs to open described safety valve during repairing, makes described oil hydraulic motor obtain hydraulic oil by described repairing oil circuit from described main oil circuit.
Hydraulic radiating of the present invention can be applicable to the occasion needing in all kinds of engineering mechanical device to dispel the heat, and is especially applicable in hoist.Therefore the present invention also provides a kind of hoist accordingly, comprises aforesaid hydraulic radiating.
Finally should be noted that: above embodiment is only in order to illustrate that technological scheme of the present invention is not intended to limit; Although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the field are to be understood that: still can modify to the specific embodiment of the present invention or carry out equivalent replacement to portion of techniques feature; And not departing from the spirit of technical solution of the present invention, it all should be encompassed in the middle of the technological scheme scope of request of the present invention protection.
Claims (10)
1. a hydraulic radiating, comprise: hydraulic-pressure pump, hydraulic oil container, oil hydraulic motor, cooling fan and the air cooler be arranged in hydraulic circuit to be dispelled the heat, described hydraulic-pressure pump is described oil hydraulic motor fuel feeding, drive described cooling fan to rotate to make described oil hydraulic motor and wind-cooling heat dissipating is carried out to the hydraulic oil by described air cooler, it is characterized in that, also comprise: electric proportional flow control valve and temperature transducer, on hydraulic circuit to be dispelled the heat described in wherein said temperature transducer is arranged on, oil temperature in hydraulic circuit described to be dispelled the heat can be detected, described electric proportional flow control valve is arranged on the oil-feed oil circuit of described oil hydraulic motor, the Oil-temperature control that can detect according to described temperature transducer enters into the hydraulic fluid flow rate of described oil hydraulic motor, to make the oil temperature fit of the rotating speed of described oil hydraulic motor and hydraulic circuit described to be dispelled the heat.
2. hydraulic radiating according to claim 1, it is characterized in that, also comprise the bypass valve in parallel with described air cooler, described bypass valve can the oil pressure difference between the entrance and exit of described air cooler be opened when exceeding preset pressure, and the hydraulic oil in hydraulic circuit to be dispelled the heat described in making directly flows back to described hydraulic oil container by described bypass valve.
3. hydraulic radiating according to claim 1, is characterized in that, described in hydraulic circuit to be dispelled the heat be main oil circuit.
4. hydraulic radiating according to claim 2, it is characterized in that, repairing oil circuit is also provided with between the filler opening and the outlet of described air cooler of described oil hydraulic motor, described repairing oil circuit is provided with safety valve, described safety valve can need to open during repairing at described oil hydraulic motor, makes described oil hydraulic motor obtain hydraulic oil by described repairing oil circuit from described main oil circuit.
5. hydraulic radiating according to claim 3, is characterized in that, the point for measuring temperature of described temperature transducer arranges the entry position of the return oil filter on described main oil circuit.
6. hydraulic radiating according to claim 1, it is characterized in that, described electric proportional flow control valve adopts electric proportional velocity regulating valve, described electric proportional velocity regulating valve has the by-pass port be directly communicated with described hydraulic oil container, to make the hydraulic oil entering into described electric proportional velocity regulating valve directly flow back to described hydraulic oil container by described by-pass port when the throttle valve in described electric proportional velocity regulating valve cuts out.
7., based on a hydraulic pressure cooling control method for the arbitrary described hydraulic radiating of claim 1 ~ 6, it is characterized in that, comprising:
The oil temperature that temperature transducer is treated in the hydraulic circuit of heat radiation detects;
Electricity proportional flow control valve enters into the hydraulic fluid flow rate of oil hydraulic motor according to the Oil-temperature control that described temperature transducer detects, to make the oil temperature fit of the rotating speed of described oil hydraulic motor and hydraulic circuit described to be dispelled the heat.
8. hydraulic pressure cooling control method according to claim 7, it is characterized in that, described hydraulic radiating also comprises the bypass valve in parallel with air cooler, described method comprises further: open described bypass valve when the oil pressure difference between the entrance and exit of described air cooler exceedes preset pressure, the hydraulic oil in hydraulic circuit to be dispelled the heat described in making directly flows back to hydraulic oil container by described bypass valve.
9. hydraulic pressure cooling control method according to claim 7, it is characterized in that, hydraulic circuit described to be dispelled the heat is main oil circuit, and repairing oil circuit is also provided with between the filler opening and the outlet of described air cooler of oil hydraulic motor, described repairing oil circuit is provided with safety valve, described method comprises further: when described oil hydraulic motor needs to open described safety valve during repairing, makes described oil hydraulic motor obtain hydraulic oil by described repairing oil circuit from described main oil circuit.
10. a hoist, is characterized in that, comprises the arbitrary described hydraulic radiating of claim 1 ~ 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410550385.9A CN105465106B (en) | 2014-10-16 | 2014-10-16 | Hydraulic radiating, control method and crane |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410550385.9A CN105465106B (en) | 2014-10-16 | 2014-10-16 | Hydraulic radiating, control method and crane |
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| CN105465106A true CN105465106A (en) | 2016-04-06 |
| CN105465106B CN105465106B (en) | 2019-02-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110107561A (en) * | 2019-05-30 | 2019-08-09 | 湖南三一港口设备有限公司 | Heat dissipation system, heat dissipation method and engineering machinery |
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| US20110014062A1 (en) * | 2008-03-31 | 2011-01-20 | Masaaki Imaizumi | Control device of hydraulically driven fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110107561A (en) * | 2019-05-30 | 2019-08-09 | 湖南三一港口设备有限公司 | Heat dissipation system, heat dissipation method and engineering machinery |
| CN110107561B (en) * | 2019-05-30 | 2020-08-04 | 湖南三一港口设备有限公司 | Heat dissipation system, heat dissipation method and engineering machinery |
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| CN105465106B (en) | 2019-02-22 |
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Address after: 221000 No.68, Gaoxin Road, Xuzhou Economic and Technological Development Zone, Xuzhou City, Jiangsu Province Patentee after: Xuzhou Heavy Machinery Co.,Ltd. Address before: 221004 No. 165 Copper Mountain Road, Jiangsu, Xuzhou Patentee before: Xuzhou Heavy Machinery Co.,Ltd. |