CN105465106B - Hydraulic radiating, control method and crane - Google Patents
Hydraulic radiating, control method and crane Download PDFInfo
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- CN105465106B CN105465106B CN201410550385.9A CN201410550385A CN105465106B CN 105465106 B CN105465106 B CN 105465106B CN 201410550385 A CN201410550385 A CN 201410550385A CN 105465106 B CN105465106 B CN 105465106B
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Abstract
The present invention relates to a kind of hydraulic radiatings, control method and crane, hydraulic radiating includes: hydraulic oil pump, hydraulic oil container, hydraulic motor, cooling fan and the air cooler being arranged in hydraulic circuit to be radiated, further include: electric proportional flow control valve and temperature sensor, wherein the temperature sensor is arranged on the hydraulic circuit to be radiated, oil temperature in the hydraulic circuit to be radiated can be detected, the electricity proportional flow control valve is arranged on the oil inlet oil circuit of the hydraulic motor, the hydraulic fluid flow rate of the hydraulic motor can be entered according to the Oil-temperature control that the temperature sensor detects, so that the revolving speed of the hydraulic motor and the oil temperature of the hydraulic circuit to be radiated match.The present invention can be improved the radiating efficiency of hydraulic radiating, improve the security reliability of system.
Description
Technical field
The present invention relates to field of hydraulic control more particularly to a kind of hydraulic radiatings, control method and crane.
Background technique
Four big-movements (raising, flexible, luffing and revolution) of crane are all made of hydraulic drive at present, and due to hydraulic biography
The working environment and operating condition of the characteristics of moving itself and its rather harsh, heat caused by hydraulic system depend merely on hydraulic oil container, liquid
What the diverging of pressure element and tube surface was generally inadequate, and effective control of hydraulic oil temperature is the base that hydraulic system works normally
This premise, therefore dedicated cooling device is set in hydraulic system and cooling circuit is indispensable important link.
Crane has the cooling system driven using hydraulic motor at present, as shown in Figure 1.This kind of cooling system is using dedicated
Fan a1 the air cooler a2 being arranged on oil return circuit T is carried out forcing to accelerate heat exchange, fan a1 drives by hydraulic motor a3,
And hydraulic motor a3 is by quantitative gear pump a4 fuel feeding, the hydraulic oil that quantitative gear pump a4 is provided is directly entered liquid by Sandwich plate valve a5
Pressure motor a3.Hydraulic motor a3 drives the heat dissipation capacity of cooling system in direct ratio related to the revolving speed of hydraulic motor a3, and revolving speed is got over
Height, heat dissipation capacity are bigger.And the revolving speed of hydraulic motor a3 is determined by the flow of hydraulic motor a3, is used in current crane
Cooling system in, quantitative gear pump a4 is not adjustable to the flow that hydraulic motor a3 is provided, this is caused when engine speed liter
Gao Shi, pump discharge increase, and the flow and revolving speed of corresponding hydraulic motor a3 increases, and drive fan a1 to accelerate heat exchange, make
Oil temperature decline.
There is following defects for the cooling system of hydraulic motor driving at present:
1, in hydraulic system work, no matter how high hydraulic oil oil temperature is, and hydraulic motor is in the state of running at high speed, if
Engine speed is excessively high, causes hydraulic motor flow excessive, then is likely to result in the danger of hydraulic motor overspeed operation, and then right
Hydraulic motor damages, and influences its service life；And when hydraulic oil oil temperature is lower, hydraulic motor still runs at high speed, then
Cause the waste of system capacity.
2, when excessive by the flow pressure-difference of air cooler a2, calorific value when hydraulic oil is by air cooler a2 is likely larger than
Heat dissipation capacity, thus be unable to reach cooling system for hydraulic oil cooling purpose.
Summary of the invention
The purpose of the present invention is to propose to a kind of hydraulic radiating, control method and cranes, can be improved radiating efficiency,
The security reliability of raising system.
To achieve the above object, the present invention provides a kind of hydraulic radiatings, comprising: hydraulic oil pump, hydraulic oil container, liquid
Pressure motor, cooling fan and the air cooler being arranged in hydraulic circuit to be radiated, the hydraulic oil pump are the hydraulic motor
Fuel feeding, so that the hydraulic motor drives the cooling fan rotation to carry out air-cooled dissipate to the hydraulic oil by the air cooler
Heat, wherein further include: electric proportional flow control valve and temperature sensor, wherein the liquid to be radiated is arranged in the temperature sensor
Pressure oil road, can detect the oil temperature in the hydraulic circuit to be radiated, and the electricity proportional flow control valve is arranged in institute
It states on the oil inlet oil circuit of hydraulic motor, the hydraulic horse can be entered according to the Oil-temperature control that the temperature sensor detects
The hydraulic fluid flow rate reached, so that the revolving speed of the hydraulic motor and the oil temperature of the hydraulic circuit to be radiated match.
It further, further include the by-passing valve in parallel with the air cooler, the by-passing valve can be in the air cooler
Oil pressure difference between entrance and exit is opened when being more than preset pressure, passes through the hydraulic oil in the hydraulic circuit to be radiated
The by-passing valve directly flows back to the hydraulic oil container.
Further, the hydraulic circuit to be radiated is main oil return line.
Further, it is additionally provided with repairing oil circuit between the oil inlet of the hydraulic motor and the outlet of the air cooler,
Be equipped with safety valve on the repairing oil circuit, the safety valve can when the hydraulic motor needs repairing opening, make described
Hydraulic motor obtains hydraulic oil from the main oil return line by the repairing oil circuit.
Further, the entrance position of the return oil filter on the main oil return line is arranged in the temperature measuring point of the temperature sensor
It sets.
Further, the electric proportional flow control valve is using electric proportional velocity regulating valve, the electricity proportional velocity regulating valve have with it is described
The by-pass port that hydraulic oil container is directly connected to makes to enter the electric ratio when closing so as to the throttle valve in the electric proportional velocity regulating valve
The hydraulic oil of example speed governing valve directly flows back to the hydraulic oil container by the by-pass port.
To achieve the above object, the present invention also provides a kind of hydraulic radiating control sides based on aforementioned hydraulic cooling system
Method, comprising:
Temperature sensor is treated the oil temperature in the hydraulic circuit of heat dissipation and is detected；
Electric proportional flow control valve enters the hydraulic oil of hydraulic motor according to the Oil-temperature control that the temperature sensor detects
Flow, so that the revolving speed of the hydraulic motor and the oil temperature of the hydraulic circuit to be radiated match.
Further, the hydraulic radiating further includes the by-passing valve in parallel with air cooler, and the method is further wrapped
It includes: the by-passing valve is opened when the oil pressure difference between the entrance and exit of the air cooler is more than preset pressure, so that described
Hydraulic oil in hydraulic circuit to be radiated directly flows back to hydraulic oil container by the by-passing valve.
Further, the hydraulic circuit to be radiated is main oil return line, and in the oil inlet of hydraulic motor and the wind
It is additionally provided with repairing oil circuit between the outlet of cooler, safety valve is equipped on the repairing oil circuit, the method further includes: when
The hydraulic motor needs to open the safety valve when repairing, so that the hydraulic motor is by the repairing oil circuit from the master
Oil return line obtains hydraulic oil.
To achieve the above object, the present invention also provides a kind of cranes, including hydraulic radiating above-mentioned.
Based on the above-mentioned technical proposal, the present invention detects the oil temperature height of oil circuit to be radiated by temperature sensor, and passes through
Electric proportional flow control valve controls the hydraulic fluid flow rate for entering hydraulic motor according to oil temperature, so that the revolving speed and oil temperature of hydraulic motor
It matches, can thus reduce the flow of hydraulic motor when oil temperature is lower, the revolving speed of cooling fan be reduced, to save the energy
Consumption, and increase the flow of hydraulic motor when oil temperature is higher, the revolving speed of cooling fan is improved, to obtain preferably heat dissipation effect
Fruit, and then have the function that the radiating efficiency for improving hydraulic radiating, while also avoiding existing cooling system in low temperature feelings
Under condition because engine speed is higher leads to hydraulic motor overspeed operation the phenomenon that, the safe and reliable of hydraulic radiating is improved
Property.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is the hydraulic principle schematic diagram of the existing cooling system by hydraulic motor driving.
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 the another embodiment of hydraulic radiating of the present invention.
Specific embodiment
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
As shown in Fig. 2, the hydraulic principle schematic diagram of the embodiment for hydraulic radiating of the present invention.In the present embodiment
In, hydraulic radiating includes: hydraulic oil pump 1, hydraulic oil container 10, hydraulic motor 2, cooling fan 3 and is arranged in be radiated
Air cooler 4 in hydraulic circuit.Wherein, hydraulic oil pump 1 is 2 fuel feeding of hydraulic motor, so that hydraulic motor 2 drives cooling fan 3
Rotation, and cooling fan 3 rotate brought by cooling wind can carry out wind-cooling heat dissipating to by the hydraulic oil of air cooler.
In order to realize the intelligent control of hydraulic heat dissipation, electric proportional flow control valve 6 and temperature can be added in hydraulic radiating
Sensor 5 is spent, wherein temperature sensor 5 is arranged on hydraulic circuit to be radiated, and can treat in the hydraulic circuit of heat dissipation
Oil temperature is detected, and electric proportional flow control valve 6 is arranged on the oil inlet oil circuit of hydraulic motor 2, can be examined according to temperature sensor 5
The Oil-temperature control measured enters the hydraulic fluid flow rate of hydraulic motor 2, so that the revolving speed of hydraulic motor 2 and hydraulic oil to be radiated
The oil temperature on road matches.
Electric proportional flow control valve is a kind of valve that can change its internal restriction valve by the size of control application electric current
The Hydraulic Elements of aperture can be will increase, instead when intensifying valve aperture by the flow of the hydraulic oil of the electricity proportional flow control valve
When reflecting in hydraulic radiating the hydraulic fluid flow rate for entering hydraulic motor will increase, hydraulic motor rotary speed is driven to mention
Height increases heat dissipation effect；Otherwise valve opening is reduced, then the flow of the hydraulic oil by the electricity proportional flow control valve can be made to subtract
It is few, when reflecting into hydraulic radiating the hydraulic fluid flow rate for entering hydraulic motor will be reduced, hydraulic motor is driven to turn
Speed reduces, and weakens heat dissipation effect, but also save energy consumption.
Since electric proportional flow control valve can be carried out the control of valve opening by application electric current, using nonshared control unit or
Control system can connect it with the temperature sensor for being used to detect oil temperature, realize intelligentized control process, i.e.,
The oil temperature signal measured is converted into control the current signal of electric proportional flow control valve, so that the revolving speed of hydraulic motor can be with oil
Temperature matches.
Electricity proportional flow control valve 6 shown in figure 2 is using electric proportional velocity regulating valve, from the figure, it can be seen that the electricity ratio
Example speed governing valve has the by-pass port being directly connected to hydraulic oil container 10, when the throttle valve in electric proportional velocity regulating valve is closed, enters
Hydraulic oil to electric proportional velocity regulating valve can directly flow back to hydraulic oil container by by-pass port.It thus can be in oil to be radiated
The oil temperature on road it is lower without heat dissipation in the case of, the hydraulic oil for pumping out hydraulic oil pump directly flows back to fuel tank, and is no longer flow into
Hydraulic motor drives cooling fan to rotate, to reach good energy-saving effect.
Existing Hydraulic Elements can be selected in electric proportional velocity regulating valve, and this Hydraulic Elements can not only be according to the control signal of input
Automatically flow is adjusted, and its flow not will receive the influence of load pressure fluctuation substantially.
In addition, hydraulic radiating of the invention can be applied to the various oil circuits for needing to radiate, for engineerings such as cranes
Air cooler 4 can be arranged to avoid the high oil temperature in hydraulic oil container in machinery on main oil return line T, correspondingly, can will be warm
The entry position of the return oil filter 9 into before hydraulic oil container 10 is arranged in degree sensor 5.
As shown in figure 3, the hydraulic principle schematic diagram of another embodiment for hydraulic radiating of the present invention.Implement with upper one
Example is compared, and the hydraulic radiating of the present embodiment further includes the by-passing valve 7 in parallel with air cooler 4, and by-passing valve 7 can be in air cooler
Oil pressure difference between 4 entrance and exit is opened when being more than preset pressure (such as 4bar shown in Fig. 3), makes liquid to be radiated
Hydraulic oil in pressure oil road (being main oil return line T shown in Fig. 3) directly flows back to hydraulic oil container 10 by by-passing valve 7.Thus
Cause to generate heat because pressure difference is excessive when can pass through air cooler 4 to avoid hydraulic oil, and then cannot achieve cooling using cooling system
The problem of purpose of oil liquid.
The setting of the preset pressure of by-passing valve 7 can pass through calorific value and heat dissipation of the test air cooler 4 under different pressure differences
The size relation of amount determines, however it is not limited to 4bar shown in Fig. 3 embodiment.
As shown in figure 4, the hydraulic principle schematic diagram of the another embodiment for hydraulic radiating of the present invention.Implement with upper one
Example is compared, and the present embodiment is additionally provided with repairing oil circuit between the outlet of the oil inlet and air cooler 4 of hydraulic motor 2, in repairing oil
Road be equipped with safety valve 8, safety valve 8 can when hydraulic motor 2 needs repairing opening, make hydraulic motor 2 pass through repairing oil circuit
Hydraulic oil is obtained from main oil return line T.
When hydraulic oil pump stops working or electric proportional velocity regulating valve is closed suddenly, hydraulic motor continues to revolve due to inertia
Turning, the hydraulic oil in main oil return line T can flow into hydraulic motor by the safety valve at this time, repairing is carried out to hydraulic motor,
To prevent hydraulic motor from emptying phenomenon occur, to realize the safeguard protection to hydraulic motor.
Based on above-mentioned various hydraulic radiating embodiments, hydraulic cooling control method below can be implemented, comprising:
Temperature sensor is treated the oil temperature in the hydraulic circuit of heat dissipation and is detected；
Electric proportional flow control valve enters the hydraulic oil of hydraulic motor according to the Oil-temperature control that the temperature sensor detects
Flow, so that the revolving speed of the hydraulic motor and the oil temperature of the hydraulic circuit to be radiated match.
In another embodiment of the method, hydraulic radiating further includes the by-passing valve in parallel with air cooler, then method into
One step includes: to open the by-passing valve when the oil pressure difference between the entrance and exit of the air cooler is more than preset pressure, is made
The hydraulic oil obtained in the hydraulic circuit to be radiated directly flows back to hydraulic oil container by the by-passing valve.
In another embodiment of the method, hydraulic circuit to be radiated is main oil return line, and in the oil inlet of hydraulic motor
It is additionally provided with repairing oil circuit between the outlet of the air cooler, safety valve is equipped on the repairing oil circuit, then this method is into one
Step includes: that the safety valve is opened when the hydraulic motor needs repairing, so that the hydraulic motor passes through the repairing oil
Road obtains hydraulic oil from the main oil return line.
Hydraulic radiating of the invention can be applied to the occasion for needing to radiate in all kinds of engineering mechanical devices, can especially fit
For in crane.Therefore the present invention also provides a kind of crane, including hydraulic radiating above-mentioned accordingly.
Finally it should be noted that: the above embodiments are merely illustrative of the technical scheme of the present invention and are not intended to be limiting thereof；To the greatest extent
The present invention is described in detail with reference to preferred embodiments for pipe, it should be understood by those ordinary skilled in the art that: still
It can modify to a specific embodiment of the invention or some technical features can be equivalently replaced；Without departing from this hair
The spirit of bright technical solution should all cover within the scope of the technical scheme claimed by the invention.
Claims (8)
1. a kind of hydraulic radiating, comprising: hydraulic oil pump, hydraulic oil container, hydraulic motor, cooling fan and setting are wait radiate
Hydraulic circuit in air cooler, the hydraulic oil pump be the hydraulic motor fuel feeding so that the hydraulic motor drive described in
Cooling fan rotation to carry out wind-cooling heat dissipating to by the hydraulic oil of the air cooler, which is characterized in that further include: electric ratio stream
Measure valve and temperature sensor, wherein the temperature sensor is arranged on the hydraulic circuit to be radiated, can to it is described to
Oil temperature in the hydraulic circuit of heat dissipation is detected, and the oil inlet oil circuit of the hydraulic motor is arranged in the electricity proportional flow control valve
On, the hydraulic fluid flow rate of the hydraulic motor can be entered according to the Oil-temperature control that the temperature sensor detects, so that
The revolving speed of the hydraulic motor and the oil temperature of the hydraulic circuit to be radiated match；
The hydraulic radiating further includes the by-passing valve in parallel with the air cooler, and the by-passing valve can be in the air cooler
Entrance and exit between oil pressure difference open when being more than preset pressure, keep the hydraulic oil in the hydraulic circuit to be radiated logical
It crosses the by-passing valve and directly flows back to the hydraulic oil container, cause when passing through the air cooler to avoid hydraulic oil because pressure difference is excessive
Fever.
2. hydraulic radiating according to claim 1, which is characterized in that the hydraulic circuit to be radiated is main oil return
Road.
3. hydraulic radiating according to claim 1, which is characterized in that in the oil inlet of the hydraulic motor and described
It is additionally provided with repairing oil circuit between the outlet of air cooler, safety valve is equipped on the repairing oil circuit, the safety valve can be in institute
Opening when hydraulic motor needs repairing is stated, the hydraulic motor is made to obtain hydraulic oil from main oil return line by the repairing oil circuit.
4. hydraulic radiating according to claim 2, which is characterized in that institute is arranged in the temperature measuring point of the temperature sensor
State the entry position of the return oil filter on main oil return line.
5. hydraulic radiating according to claim 1, which is characterized in that the electricity proportional flow control valve is using electric ratio tune
Fast valve, the electricity proportional velocity regulating valve have the by-pass port being directly connected to the hydraulic oil container, so as to the electric proportional velocity regulating valve
In throttle valve make to enter the hydraulic oil of the electric proportional velocity regulating valve when closing the liquid directly flowed back to by the by-pass port
Pressure oil case.
6. a kind of hydraulic cooling control method based on any hydraulic radiating of Claims 1 to 5, feature exist
In, comprising:
Temperature sensor is treated the oil temperature in the hydraulic circuit of heat dissipation and is detected；
Electric proportional flow control valve enters the hydraulic fluid flow rate of hydraulic motor according to the Oil-temperature control that the temperature sensor detects,
So that the revolving speed of the hydraulic motor and the oil temperature of the hydraulic circuit to be radiated match；
Wherein, the hydraulic radiating further includes the by-passing valve in parallel with air cooler, the method further includes: when described
Oil pressure difference between the entrance and exit of air cooler opens the by-passing valve when being more than preset pressure, so that the liquid to be radiated
Hydraulic oil in pressure oil road directly flows back to hydraulic oil container by the by-passing valve, when passing through the air cooler to avoid hydraulic oil because
Cause to generate heat for pressure difference is excessive.
7. hydraulic cooling control method according to claim 6, which is characterized in that based on the hydraulic circuit to be radiated
Oil return line, and repairing oil circuit is additionally provided between the oil inlet of hydraulic motor and the outlet of the air cooler, in the repairing oil
Road is equipped with safety valve, the method further includes: the safety valve is opened when the hydraulic motor needs repairing, so that
The hydraulic motor obtains hydraulic oil from the main oil return line by the repairing oil circuit.
8. a kind of crane, which is characterized in that including any hydraulic radiating of Claims 1 to 5.
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 |
|---|---|---|---|
| CN201410550385.9A CN105465106B (en) | 2014-10-16 | 2014-10-16 | Hydraulic radiating, control method and crane |
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| Publication Number | Publication Date |
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| CN105465106A CN105465106A (en) | 2016-04-06 |
| CN105465106B true CN105465106B (en) | 2019-02-22 |
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| CN201410550385.9A Active CN105465106B (en) | 2014-10-16 | 2014-10-16 | Hydraulic radiating, control method and crane |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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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| CN203488484U (en) * | 2013-09-03 | 2014-03-19 | 徐州重型机械有限公司 | Crane and hydraulic system thereof |
| CN103883384A (en) * | 2014-04-17 | 2014-06-25 | 徐州重型机械有限公司 | Hydraulic radiating system, construction crane and hydraulic radiating capability adjusting method |
| CN203730468U (en) * | 2014-03-25 | 2014-07-23 | 徐工集团工程机械股份有限公司 | Thermo-sensitive element-controlled loader independent cooling system |
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Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110014062A1 (en) * | 2008-03-31 | 2011-01-20 | Masaaki Imaizumi | Control device of hydraulically driven fan |
| CN201729056U (en) * | 2010-07-28 | 2011-02-02 | 三一集团有限公司 | Heat-radiating system for engineering machinery and engineering machinery |
| CN202251257U (en) * | 2011-09-08 | 2012-05-30 | 安徽星马汽车股份有限公司 | Adjustable cooling device for hydraulic oil of concrete pump truck |
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| CN203382397U (en) * | 2013-07-15 | 2014-01-08 | 徐州重型机械有限公司 | Wheeled crane and hydraulic control system thereof |
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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. |