CN106321218A - Cooling control system and method and excavator - Google Patents

Abstract

The invention discloses a cooling control system and method and an excavator. The cooling control system comprises a state monitoring device, an environment temperature sensor, a temperature controller and a fan speed adjusting execution device; the state monitoring device measures state parameters of a cooling object, and transmits the state parameters to the temperature controller; the environment temperature sensor measures the environment temperature and transmits the environment temperature to the temperature controller; the temperature controller outputs a speed adjusting control signal to the fan speed adjusting execution device according to the state parameters and the environment temperature; the fan speed adjusting execution device adjusts the actual rotating speed of a fan according to the speed adjusting control signal so as to carry out cooling, and therefore the rotating speed of the fan can be adjusted according to the state parameters and the environment temperature of the cooling object, power losses of an engine can be reduced, and the work efficiency of the excavator is improved.

Description

Cooling control system, method and excavator

Technical field

The present invention relates to engineering machinery field, particularly to cooling control system, method and dig Pick machine.

Background technology

In the course of the work, the power attenuation electromotor to be accounted for of cooling system exports hydraulic crawler excavator The 10%～15% of power, and the power attenuation of cooling system is mainly caused by fan, heat radiation system Cube being directly proportional, therefore, if can be worked at excavator of consumption and the rotation speed of the fan of system power Journey efficiently controls rotation speed of the fan, then can greatly reduce the power loss of electromotor.

Fig. 1 is to illustrate the structural representation of the cooling system of hydraulic crawler excavator in prior art.As Shown in Fig. 1, cooling system includes: electromotor 110, fan 120 and radiator 130.Dig The cooling system of pick machine is mainly by cooling down fan aspirated heat radiation.Fan 120 and electromotor 110 Output shaft direct connection.Fan keeps the rotating speed identical with electromotor, makes fan run up all the time, There is higher power consumption so that the cooling system of excavator is in higher load conditions all the time Lower work, adds excavator oil consumption.

Additionally, electromotor typically has optimum working temperature, dissipating of the direct-connected radiator fan of electromotor Hot mode, it is impossible to make electromotor and hydraulic work system in optimum temperature range, both can cause Power dissipation, also can affect the work efficiency of excavator.

Such as, when radiating fan rotation speed is higher, engine radiator is made to remain bigger dissipating Heat, can extend engine temperature and reach the time of optimum working temperature, especially low temperature environment Time, engine warm-up is slow, affects engine operating efficiency, reduces workload, also can cause and send out Too much power attenuation in motivation warming-up process, and make hydraulic oil be in relatively low temperature for a long time Degree, increases hydraulic oil viscosity and flow resistance, reduces hydraulic work system efficiency.

Summary of the invention

The present invention needs one solved technical problem is that: the cooling system of prior art can not be adjusted The rotating speed of joint fan.

According to the first aspect of the invention, it is provided that a kind of cooling control system, including state Detection device, for measuring the state parameter of heat radiation object, and transmits described state parameter extremely Temperature controller；Environment temperature sensor, is used for measuring ambient temperature, and by described environment temperature Degree transmission is to described temperature controller；Temperature controller, according to described state parameter and described ring Border temperature performs device output speed regulating control signal to fan speed-regulating；And fan speed-regulating performs dress Put, for according to described speed regulating control Signal Regulation fan actual speed, to dispel the heat.

Further, described fan speed-regulating performs device and includes: motor, drives hydraulic pump operating, And receive described speed regulating control signal from described temperature controller, according to described speed regulating control signal The rotating speed of regulation hydraulic pump；Hydraulic pump, exports silicone oil to silicon oil clutch, and turns according to self The silicone oil amount of velocity modulation joint output；Silicon oil clutch, is arranged between electromotor and fan, according to The silicon fuel-flow control fan actual speed of input.

Further, the state parameter of described heat radiation object includes: engine temperature, electromotor turn Speed and engine output torque；Described temperature controller is by engine temperature T_{Send out}Respectively with electromotor Higher limit T of normal working temperature scope_{Send out max}With lower limit T_{Send out min}Compare, and according to than Relatively result determines fan target rotating speed, and according to described fan target rotating speed to described fan speed-regulating Perform device output speed regulating control signal.

Further, temperature controller uses following methods to determine fan target rotating speed: if T_{Send out}<T_{Send out min}, it is determined that described fan target rotating speed is the minimum speed of fan；If T_{Send out min}≤T_{Send out}≤T_{Send out max}, it is determined that described engine temperature according to described fan target rotating speed, Described engine speed, described engine output torque and described ambient temperature calculate the obtained One fan target rotating speed；If T_{Send out}>T_{Send out max}, it is determined that described fan target rotating speed is fan Maximum speed.

Further, described temperature controller uses following methods to determine the first fan target rotating speed: Engine output is determined according to described engine speed and described engine output torque；Root According to the ratio between described engine output and engine heat load and engine output Example relation determines engine heat load；According to described engine heat load, described engine temperature With the coefficient of heat transfer that described ambient temperature determines engine radiator；According to described engine radiating Between coefficient of heat transfer and the first fan target rotating speed and the coefficient of heat transfer of engine radiator of device Proportionate relationship determine described first fan target rotating speed.

Further, described temperature controller calculates and obtains described first fan target rotating speed n_{Target 1}'s Formula includes: P_Output=ω_{Send out}×M_Output, wherein, P_OutputFor engine output, ω_{Send out}For starting Machine rotating speed, M_OutputFor engine output torque；Q_{Send out}=k₁×P_Output, wherein, Q_{Send out}For electromotor Thermic load, k₁For the proportionality coefficient between engine heat load and engine output；Wherein, α_{Send out}For the coefficient of heat transfer of engine radiator, A_{Send out}For sending out The area of dissipation of motivation radiator, T_RingFor ambient temperature；And n_{Target 1}=k₃×α_{Send out}, wherein, k₃ It it is the proportionality coefficient between the first fan target rotating speed and the coefficient of heat transfer of engine radiator.

Further, the state parameter of described heat radiation object includes: engine temperature, electromotor turn Speed, engine output torque and hydraulic fluid temperature；Described temperature controller is by engine temperature T_{Send out} Respectively with higher limit T of engine work temperature range_{Send out max}With lower limit T_{Send out min}Compare Relatively, and by hydraulic fluid temperature T_OilRespectively with the higher limit of hydraulic system normal working temperature scope T_{Oil max}With lower limit T_{Oil min}Compare, and determine fan target rotating speed according to comparative result, And perform device output speed regulating control signal according to described fan target rotating speed to described fan speed-regulating.

Further, described temperature controller uses following methods to determine fan target rotating speed: if T_{Send out}<T_{Send out min}And T_Oil<T_{Oil min}, it is determined that described fan target rotating speed is the minimum speed of fan； If T_{Send out min}≤T_{Send out}<T_{Send out max}And T_Oil<T_{Oil min}Or T_{Send out max}<T_{Send out}And T_{Oil min}≤T_Oil≤T_{Oil max}, Then determine described engine temperature according to described fan target rotating speed, described engine speed, Described engine output torque and described ambient temperature calculate the first fan target rotating speed obtained； If T_{Send out}<T_{Send out min}And T_{Oil min}≤T_Oil<T_{Oil max}Or T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil max}<T_Oil, Then determine described hydraulic fluid temperature according to described fan target rotating speed, described engine speed, Described engine output torque and described ambient temperature calculate the second fan target rotating speed obtained； If T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil min}≤T_Oil≤T_{Oil max}, the most described first fan target turns Fast and described second fan target rotating speed, determines that described fan target rotating speed is for the biggest One；If T_{Send out max}<T_{Send out}And T_{Oil max}<T_Oil, it is determined that described fan target rotating speed is fan Maximum speed.

Further, described temperature controller uses following methods to determine the second fan target rotating speed: Engine output is determined according to described engine speed and described engine output torque；Root The ratio of engine output is accounted for according to described engine output and hydraulic system thermic load Determine hydraulic system thermic load；According to described hydraulic system thermic load, described hydraulic system temperature With the coefficient of heat transfer that described ambient temperature determines hydraulic system radiator；According to described hydraulic system The heat radiation system of the coefficient of heat transfer of radiator and the second fan target rotating speed and hydraulic system radiator Proportionate relationship between number determines described second fan target rotating speed.

Further, described temperature controller calculates and obtains described second fan target rotating speed n_{Target 2}'s Formula includes: P_Output=ω_{Send out}×M_Output, wherein, P_OutputFor engine output, ω_{Send out}For starting Machine rotating speed, M_OutputFor engine output torque；Q_Oil=k₂×P_Output, wherein, Q_OilFor hydraulic pressure system System thermic load, k₂The proportionality coefficient of engine output is accounted for for hydraulic system thermic load；Wherein, α_OilFor the coefficient of heat transfer of hydraulic system radiator, A_OilFor liquid The area of dissipation of pressure system radiating device, T_RingFor ambient temperature；And n_{Target 2}=k₄×α_Oil, wherein, k₄It it is the proportionality coefficient between the second fan target rotating speed and the coefficient of heat transfer of hydraulic system radiator.

According to the second aspect of the invention, it is provided that a kind of excavator, including: dissipate as previously mentioned Thermal control system.

According to the third aspect of the invention we, it is provided that a kind of cooling control method, including: measure The state parameter of heat radiation object and ambient temperature；According to described state parameter and described ambient temperature Output speed regulating control signal；And according to described speed regulating control Signal Regulation fan actual speed, To dispel the heat.

Further, according to described speed regulating control Signal Regulation fan actual speed, to dispel the heat Step include: use motor to drive hydraulic pump operating, and receive described speed regulating control signal, Rotating speed according to described speed regulating control Signal Regulation hydraulic pump；Use described hydraulic pump to silicone oil from Clutch output silicone oil, and the silicone oil amount exported according to self rotational speed regulation；By described silicon oil clutch Device is arranged between electromotor and fan, according to the silicon fuel-flow control fan actual speed of input.

Further, speed regulating control signal is exported according to described state parameter and described ambient temperature Step includes: the state parameter of described heat radiation object includes: engine temperature, engine speed And engine output torque；By engine temperature T_{Send out}Respectively with engine work temperature range Higher limit T_{Send out max}With lower limit T_{Send out min}Compare, and determine fan mesh according to comparative result Mark rotating speed, and perform device output speed governing according to described fan target rotating speed to described fan speed-regulating Control signal.

Further, following methods is used to determine fan target rotating speed: if T_{Send out}<T_{Send out min}, the most really Fixed described fan target rotating speed is the minimum speed of fan；If T_{Send out min}≤T_{Send out}≤T_{Send out max}, the most really Described engine temperature according to fixed described fan target rotating speed, described engine speed, described Engine output torque and described ambient temperature calculate the first fan target rotating speed obtained；If T_{Send out}>T_{Send out max}, it is determined that described fan target rotating speed is the maximum speed of fan.

Further, defeated according to described engine temperature, described engine speed, described electromotor The step going out moment of torsion and described ambient temperature calculating acquisition the first fan target rotating speed includes: according to Described engine speed and described engine output torque determine engine output；According to institute The ratio between engine output and engine heat load and engine output of stating is closed System determines engine heat load；According to described engine heat load, described engine temperature and institute State ambient temperature and determine the coefficient of heat transfer of engine radiator；According to described engine radiator Ratio between coefficient of heat transfer and the first fan target rotating speed and the coefficient of heat transfer of engine radiator Example relation determines described first fan target rotating speed.

Further, the described first fan target rotating speed n of acquisition is calculated_{Target 1}Formula include: P_Output=ω_{Send out}×M_Output, wherein, P_OutputFor engine output, ω_{Send out}For engine speed, M_Output For engine output torque；Q_{Send out}=k₁×P_Output, wherein, Q_{Send out}For engine heat load, k₁For sending out Proportionality coefficient between motivation thermic load and engine output； Wherein, α_{Send out}For the coefficient of heat transfer of engine radiator, A_{Send out}Radiating surface for engine radiator Long-pending, T_RingFor ambient temperature；And n_{Target 1}=k₃×α_{Send out}, wherein, k₃It is that the first fan target turns Proportionality coefficient between speed and the coefficient of heat transfer of engine radiator.

Further, speed regulating control signal is exported according to described state parameter and described ambient temperature Step includes: the state parameter of described heat radiation object includes: engine temperature, engine speed, Engine output torque and hydraulic fluid temperature；By engine temperature T_{Send out}Work normal with electromotor respectively Make higher limit T of temperature range_{Send out max}With lower limit T_{Send out min}Compare, and by hydraulic oil temperature Degree T_OilRespectively with higher limit T of hydraulic system normal working temperature scope_{Oil max}And lower limit T_{Oil min}Compare, and determine fan target rotating speed according to comparative result, and according to described fan Rotating speed of target performs device output speed regulating control signal to described fan speed-regulating.

Further, following methods is used to determine fan target rotating speed: if T_{Send out}<T_{Send out min}And T_Oil<T_{Oil min}, it is determined that described fan target rotating speed is the minimum speed of fan；If T_{Send out min}≤T_{Send out}<T_{Send out max}And T_Oil<T_{Oil min}Or T_{Send out max}<T_{Send out}And T_{Oil min}≤T_Oil≤T_{Oil max}, Then determine described engine temperature according to described fan target rotating speed, described engine speed, Described engine output torque and described ambient temperature calculate the first fan target rotating speed obtained； If T_{Send out}<T_{Send out min}And T_{Oil min}≤T_Oil<T_{Oil max}Or T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil max}<T_Oil, Then determine described hydraulic fluid temperature according to described fan target rotating speed, described engine speed, Described engine output torque and described ambient temperature calculate the second fan target rotating speed obtained； If T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil min}≤T_Oil≤T_{Oil max}, the most described first fan target turns Fast and described second fan target rotating speed, determines that described fan target rotating speed is for the biggest One；If T_{Send out max}<T_{Send out}And T_{Oil max}<T_Oil, it is determined that described fan target rotating speed is fan Maximum speed.

Further, defeated according to described hydraulic fluid temperature, described engine speed, described electromotor The step going out moment of torsion and described ambient temperature calculating acquisition the second fan target rotating speed includes: according to Described engine speed and described engine output torque determine engine output；According to institute State engine output and hydraulic system thermic load accounts for the ratio of engine output and determines Hydraulic system thermic load；According to described hydraulic system thermic load, described hydraulic system temperature and institute State ambient temperature and determine the coefficient of heat transfer of hydraulic system radiator；Dispel the heat according to described hydraulic system The coefficient of heat transfer of the coefficient of heat transfer of device and the second fan target rotating speed and hydraulic system radiator it Between proportionate relationship determine described second fan target rotating speed.

Further, the described second fan target rotating speed n of acquisition is calculated_{Target 2}Formula include: P_Output=ω_{Send out}×M_Output, wherein, P_OutputFor engine output, ω_{Send out}For engine speed, M_Output For engine output torque；Q_Oil=k₂×P_Output, wherein, Q_OilFor hydraulic system thermic load, k₂For Hydraulic system thermic load accounts for the proportionality coefficient of engine output； Wherein, α_OilFor the coefficient of heat transfer of hydraulic system radiator, A_OilDissipating for hydraulic system radiator Hot side amasss, T_RingFor ambient temperature；And n_{Target 2}=k₄×α_Oil, wherein, k₄It it is the second fan mesh Proportionality coefficient between mark rotating speed and the coefficient of heat transfer of hydraulic system radiator.

Present invention achieves the state parameter according to heat radiation object and ambient temperature regulates fan Rotating speed, it is possible to reduce the power loss of electromotor, improves the work efficiency of excavator.

By detailed description to the exemplary embodiment of the present invention referring to the drawings, the present invention Further feature and advantage will be made apparent from.

Accompanying drawing explanation

The accompanying drawing of the part constituting description describes embodiments of the invention, and together with saying Bright book is together for explaining the principle of the present invention.

Referring to the drawings, according to detailed description below, the present invention can be more clearly understood from, Wherein:

Fig. 1 is to illustrate the structural representation of the cooling system of hydraulic crawler excavator in prior art.

Fig. 2 is the structural representation illustrating cooling control system according to some embodiments of the invention Figure.

Fig. 3 is that the structure illustrating the cooling control system according to other embodiments of the present invention is shown It is intended to.

Fig. 4 is the flow chart illustrating cooling control method according to some embodiments of the invention.

Detailed description of the invention

The various exemplary embodiments of the present invention are described in detail now with reference to accompanying drawing.It should be noted that Arrive: unless specifically stated otherwise, the parts illustrated the most in these embodiments and the phase of step Layout, numerical expression and numerical value are not limited the scope of the invention.

Simultaneously, it should be appreciated that for the ease of describing, the chi of the various piece shown in accompanying drawing Very little is not to draw according to actual proportionate relationship.

Description only actually at least one exemplary embodiment is illustrative below, certainly Not as to the present invention and application thereof or any restriction of use.

May not make in detail for technology, method and apparatus known to person of ordinary skill in the relevant Thin discussion, but in the appropriate case, described technology, method and apparatus should be considered to authorize to be said A part for bright book.

Shown here with in all examples discussed, any occurrence should be construed as merely Exemplary rather than conduct limits.Therefore, other example of exemplary embodiment can have There is different values.

It should also be noted that similar label and letter expression similar terms in following accompanying drawing, therefore, The most a certain Xiang Yi accompanying drawing is defined, then need not it is carried out in accompanying drawing subsequently Discussed further.

Fig. 2 is the structural representation illustrating cooling control system according to some embodiments of the invention Figure.As in figure 2 it is shown, cooling control system 200 includes: condition checkout gear 201, environment Temperature sensor 202, temperature controller 203 and fan speed-regulating execution device 204, wherein, Condition checkout gear 201, environment temperature sensor 202 and fan speed-regulating perform 204 points of device Do not electrically connect with temperature controller 203, such as, connected by data wire or wireless connections.For Descriptive purpose, also show electromotor 210, fan 220 and radiator 230 in Fig. 2. Radiator 230 may include that engine radiator and/or hydraulic system radiator.

Condition checkout gear 201 is for measuring the state parameter of heat radiation object, and this state is joined Number transmission is to temperature controller 203.

Environment temperature sensor 202 (being such as arranged on outside excavator) is used for measuring environment temperature Degree, and this ambient temperature is transmitted to temperature controller 203.By accessing environment temperature sensing Device can monitoring of environmental temperature in real time, introduce the ambient temperature impact on heat radiation, improve excavation The machine adaptability to environment.

Temperature controller 203 receives state parameter and ambient temperature, according to this state parameter and should Ambient temperature performs device 204 to fan speed-regulating and exports speed regulating control signal.Such as, temperature control Device processed can obtain fan target rotating speed according to state parameter and ambient temperature, and according to this fan Rotating speed of target performs device output speed regulating control signal to fan speed-regulating.By cut-in temperature control Device can obtain some heat radiation object (such as electromotor, hydraulic system) and temperature of environment in real time Degree, and carry out corresponding rotation speed of the fan regulation according to said temperature value, it is ensured that excavator work temperature That spends is constant.

Fan speed-regulating performs device 204 and is used for according to speed regulating control Signal Regulation fan actual speed, To dispel the heat.As in figure 2 it is shown, electromotor 210 drives fan 220 to operate, fan speed-regulating Perform device 204 to be arranged between electromotor 210 and fan 220, performed by fan speed-regulating Device 204 regulates the rotating speed of fan.

In this embodiment, measure scattered respectively by condition checkout gear and environment temperature sensor The state parameter of heat target and ambient temperature, and by these data transmission to temperature controller, temperature Degree controller performs device output according to the state parameter obtained and ambient temperature to fan speed-regulating and adjusts Speed control signal, fan speed-regulating performs device, and according to this, speed regulating control Signal Regulation fan is actual turns Speed, to dispel the heat, it is achieved thereby that state parameter and ambient temperature according to heat radiation object come The rotating speed of regulation fan, it is possible to reduce the power loss of electromotor, improves the work effect of excavator Rate.

In some embodiments of the invention, temperature controller can be realized by hardware, such as, Temperature controller may include that rotating speed of target determines unit, according to state parameter and ambient temperature Determine fan target rotating speed；And PID (Proportion Integration Differentiation, PID) unit, determine that unit is connected with rotating speed of target, according to fan target rotating speed Device output speed regulating control signal is performed to fan speed-regulating.

In one embodiment, state parameter includes: engine temperature；Rotating speed of target determines list Unit includes: comparing unit, comparison engine temperature respectively with engine work temperature range Higher limit and the size of lower limit, according to comparative result export corresponding signal.This is more single Unit can be comparator or the unit assembled by comparator.Such as, this comparing unit is permissible For having the comparator of at least three input and at least one outfan, wherein three inputs Input engine temperature T respectively_{Send out}, higher limit T of engine work temperature range_{Send out max}With Lower limit T_{Send out min}, this comparator, after comparing, exports phase according to different results at outfan The digital signal answered, such as, T_{Send out}<T_{Send out min}Time output 01, T_{Send out min}≤T_{Send out}≤T_{Send out max}Time defeated Go out 10, T_{Send out}>T_{Send out max}Time output 11, these digital signals can represent fan target rotating speed, The fan target rotating speed that different digital signal representations is different.These digital signals input to PID Unit, PID unit exports speed regulating control signal according to these digital signals.

In another embodiment, state parameter includes: engine temperature and hydraulic fluid temperature； Rotating speed of target determines that unit includes: comparing unit, and comparison engine temperature is respectively with electromotor just The often higher limit of operating temperature range and the size of lower limit, and compare hydraulic fluid temperature respectively with The higher limit of hydraulic system normal working temperature scope and the size of lower limit, according to comparative result Export corresponding signal.This comparing unit can be comparator or the list assembled by comparator Unit.Such as, this comparing unit can be to have at least six input and at least one outfan Comparator, six of which input inputs engine temperature T respectively_{Send out}, engine work Higher limit T of temperature range_{Send out max}With lower limit T_{Send out min}, and hydraulic fluid temperature T_OilAnd hydraulic pressure system Higher limit T of system normal working temperature scope_{Oil max}With lower limit T_{Oil min}.This comparator through than After relatively, according to different results at the outfan corresponding digital signal of output, such as, T_{Send out}<T_{Send out min}And T_Oil<T_{Oil min}Time, export 000, T_{Send out min}≤T_{Send out}<T_{Send out max}And T_Oil<T_{Oil min} Time output 001, T_{Send out}<T_{Send out min}And T_{Oil min}≤T_Oil<T_{Oil max}Time illustrate 010, etc., ability Field technique personnel are appreciated that for other situations, can set comparing unit output different Digital signal.These digital signals can represent fan target rotating speed, different digital signal generations The fan target rotating speed that table is different.These digital signals input to PID unit, PID unit root Speed regulating control signal is exported according to these digital signals.

Fig. 3 is that the structure illustrating the cooling control system according to other embodiments of the present invention is shown It is intended to.As it is shown on figure 3, cooling control system 300 includes: condition checkout gear 301, ring Border temperature sensor 302, temperature controller 303 and fan speed-regulating perform device 304.Here, Condition checkout gear 301, environment temperature sensor 302, temperature controller 303 and fan are adjusted Speed perform device 304 respectively with the condition checkout gear 201 in Fig. 2, environment temperature sensor 202, temperature controller 203 is similar with fan speed-regulating execution device 204.For the mesh illustrated , Fig. 3 also show electromotor 310, fan 320 and radiator 330.Radiator 330 May include that engine radiator and/or hydraulic system radiator.

In certain embodiments, as it is shown on figure 3, fan speed-regulating execution device 304 may include that Motor 3041, hydraulic pump 3042 (such as dosing pump or variable pump) and silicon oil clutch 3043. Wherein, motor 3041 electrically connects with temperature controller 303, such as, connected by data wire Or wireless connections；Motor 3041 is coaxially connected with hydraulic pump 3042；Hydraulic pump 3042 It is connected with silicon oil clutch 3043 by oil circuit.Can carry out according to the specification of silicon oil clutch Hydraulic pump and the match selection of motor.

Motor 3041 drives hydraulic pump 3042 to operate, and receives tune from temperature controller 303 Speed control signal, according to the rotating speed of speed regulating control Signal Regulation hydraulic pump 3042；Hydraulic pump 3042 Silicone oil, and the silicone oil amount (example exported according to self rotational speed regulation is exported to silicon oil clutch 3043 As, hydraulic pump can use dosing pump uninterrupted pumping, variable pump pumping or increase determining of series connection The modes such as amount pump quantity realize the regulation to silicone oil flow)；Silicon oil clutch 3043 is arranged on to be sent out Between motivation 310 and fan 320, according to the silicon fuel-flow control fan actual speed of input.

In this embodiment, driven by engine fan running, fan (such as starts to radiator Machine radiator) drying performs heat radiation, arranges silicon oil clutch between electromotor and fan, send out The free end output shaft of motivation is connected to silicon oil clutch, and silicon oil clutch is coaxially connected with fan, Silicon oil clutch is with silicone oil as working media, by controlling the big of silicone oil flow in silicon oil clutch Little, rotation speed of the fan step-less adjustment can be controlled, the size of silicone oil flow is directly proportional to rotation speed of the fan (such as, the silicone oil amount of hydraulic pump input silicon oil clutch is the biggest, silicon oil clutch for example relation Viscous force is the biggest, and the effect of moment of torsion transmission is the best, and rotation speed of the fan is the biggest).Temperature controller leads to Cross to motor output speed regulating control signal (such as, PWM (Pulse Width Modulation, Pulse width modulation) signal), the rotating speed of regulation motor, and then regulation hydraulic pump input is extremely The silicone oil amount of silicon oil clutch, it is achieved the continuous control of silicone oil flow, and then realize rotation speed of the fan Continuously adjust, add rotation speed of the fan regulation reliability and stability.

By accessing the devices such as silicon oil clutch, it is achieved fan is carried out stepless speed regulation, with fan Direct-connected with electromotor compare, it is possible to reduce in electromotor or hydraulic system temperature-rise period, fan is too much Power consumption, it is achieved fan is turned in the range of optimum working temperature by electromotor or hydraulic system The Precise control of speed, reduces the power that fan consumes further.By accessing silicon oil clutch In device, electromotor and hydraulic work system can be controlled at optimum temperature range, improve and dig The work efficiency of pick machine.

In further embodiments, can be by fan, silicon oil clutch, motor and hydraulic pump Combine referred to as silicon oil clutch fan.Temperature controller is straight according to state parameter and ambient temperature Connect and export speed regulating control signal to silicon oil clutch fan, to regulate the rotating speed of wherein fan.

In an embodiment of the present invention, as it is shown on figure 3, cooling control system 300 can also wrap Include: fan speed sensor 305, electrically connect with temperature controller 303 and (such as pass through data Line connects or wireless connections), this fan speed sensor is arranged on fan, is used for measuring Fan actual speed, and fan actual speed is transmitted to temperature controller 303；Wherein, temperature Degree controller 303 judges that this fan actual speed is the most equal with fan target rotating speed, if not Equal, then perform device 304 to fan speed-regulating in real time and export speed regulating control signal, until by wind Fan actual speed adjusts to equal with fan target rotating speed.Such as, temperature controller is to fan mesh Mark rotating speed carries out logical judgment with fan actual speed, if the two difference is relatively big, then temperature controls Speed governing control signal is regulated by device again, until the two reaches unanimity.By accessing fan Velocity sensor can realize the closed loop control of rotation speed of the fan, adjusts rotation speed of the fan in real time, improves The radiating efficiency of excavator cooling system.

In certain embodiments, as it is shown on figure 3, condition checkout gear 301 may include that send out Motivation ECM (Engine Control Module, engine control module) 3011, with temperature Controller 303 electrically connects (such as being connected) by CAN, for measuring electromotor State parameter, and this state parameter is transmitted to temperature controller 303；Wherein, this state ginseng Number includes: engine temperature, engine speed and engine output torque.Temperature controller leads to Cross electromotor ECM and obtain the temperature of electromotor, rotating speed and output moment of torsion, and combining environmental temperature Spend and fan speed-regulating execution device is controlled, thus regulate fan actual speed.

In certain embodiments, the state parameter of heat radiation object includes: engine temperature, start Machine rotating speed and engine output torque；Temperature controller 303 is by engine temperature T_{Send out}Respectively with send out Higher limit T of motivation normal working temperature scope_{Send out max}With lower limit T_{Send out min}Compare, and root Fan target rotating speed is determined according to comparative result.

In some embodiments, if T_{Send out}<T_{Send out min}, it is determined that fan target rotating speed be fan The slow-speed of revolution；If T_{Send out min}≤T_{Send out}≤T_{Send out max}, it is determined that fan target rotating speed is according to electromotor temperature Degree, engine speed, engine output torque and ambient temperature calculate the first fan mesh obtained Mark rotating speed；If T_{Send out}>T_{Send out max}, it is determined that fan target rotating speed is the maximum speed of fan.

In this embodiment, engine radiator is carried out by cooling control system control rotation speed of the fan Heat radiation.Work as T_{Send out}<T_{Send out min}Time, in order to improve work efficiency, electromotor needs to heat up as early as possible to reach To its normal working temperature scope, therefore the minimum speed that fan target rotating speed is fan is set, Through control and regulation so that fan operates with minimum speed, thus heats up quickly；When T_{Send out min}≤T_{Send out}≤T_{Send out max}Time, engine temperature is in the range of normal working temperature, at this moment Need fan to adapt to the rotation speed operation of engine temperature and ambient temperature, can be according to above-mentioned Motivational state parameter and ambient temperature control the rotating speed of fan；Work as T_{Send out}>T_{Send out max}Time, start Machine temperature is too high, needs electromotor to lower the temperature as early as possible, and therefore arranging fan target rotating speed is fan Maximum speed, by control and regulation so that fan operates with maximum speed, thus make as early as possible to send out Motivation is lowered the temperature.

In certain embodiments, temperature controller calculates the process obtaining the first fan target rotating speed Including: according to engine speed and engine output torque, temperature controller determines that electromotor exports Power；According between engine output and engine heat load and engine output Proportionate relationship determine engine heat load；According to engine heat load, engine temperature and ring Border temperature determines the coefficient of heat transfer of engine radiator；Coefficient of heat transfer according to engine radiator And proportionate relationship that first between fan target rotating speed and the coefficient of heat transfer of engine radiator is true Fixed first fan target rotating speed.

Such as, temperature controller calculates and obtains the first fan target rotating speed n_{Target 1}Formula include: P_Output=ω_{Send out}×M_Output, wherein, P_OutputFor engine output, ω_{Send out}For engine speed, M_Output For engine output torque；Q_{Send out}=k₁×P_Output, wherein, Q_{Send out}For engine heat load, k₁For sending out Proportionality coefficient between motivation thermic load and engine output； Wherein, α_{Send out}For the coefficient of heat transfer of engine radiator, A_{Send out}Radiating surface for engine radiator Long-pending, T_{Send out}For engine temperature, T_RingFor ambient temperature；And n_{Target 1}=k₃×α_{Send out}, wherein, k₃ It it is the proportionality coefficient between the first fan target rotating speed and the coefficient of heat transfer of engine radiator.

In this embodiment, temperature controller calculates the first fan target rotating speed n_{Target 1}Process As follows:

(1) temperature controller obtains engine speed ω by electromotor ECM_{Send out}And electromotor Output moment of torsion M_Output, according to P_Output=ω_{Send out}×M_OutputObtain engine output P_Output。

(2) the engine heat load Q cooled down owing to utilizing radiator to carry out_{Send out}Export with electromotor Power P_OutputProportional, thus obtain Q_{Send out}=k₁×P_Output, k₁For engine heat load and electromotor Proportionality coefficient between output, can determine according to concrete operating mode, such as can be according to sending out The type selectings of motivation etc. determine k by calculating or limited number of time experiment₁。

(3) simultaneously, Q_{Send out}With α_{Send out}、A_{Send out}And T_{Send out}-T_RingExistence function relation Q_{Send out}=f{ α_{Send out},A_{Send out},(T_{Send out}-T_Ring), such as, Q_{Send out}=α_{Send out}×A_{Send out}×(T_{Send out}-T_Ring), thus obtainWherein, A_{Send out}Can be determined by measurement etc., T_{Send out}And T_RingCan To be obtained by electromotor ECM and environment temperature sensor respectively.

(4)α_{Send out}For the coefficient of heat transfer of engine radiator, it is directly proportional to rotation speed of the fan, and with Radiator material is relevant with radiator core structure, after radiator determines, affects the master of its change Wanting factor is rotation speed of the fan, therefore can obtain the first fan target rotating speed n_{Target 1}=k₃×α_{Send out}, k₃ It is the proportionality coefficient between the first fan target rotating speed and the coefficient of heat transfer of engine radiator, can To determine according to concrete operating mode, for example, it is possible to pass through to calculate or have according to the type selecting etc. of radiator Limit time experiment determines k₃。

In further embodiments, if T_{Send out}<T_{Send out min}, it is determined that fan target rotating speed is fan Minimum speed；If T_{Send out min}≤T_{Send out}≤T_{Send out max}, it is determined that fan target rotating speed is preset value, Or it is one group of preset value corresponding from different engine temperatures；If T_{Send out}>T_{Send out max}, it is determined that Fan target rotating speed is the maximum speed of fan.

In further embodiments, as it is shown on figure 3, condition checkout gear 301 can also include: Hydraulic oil temperature sensor 3012 (being such as arranged on the oil-in of hydraulic system radiator), Electrically connect with temperature controller 303 (being such as connected by data wire or wireless connections), use In the hydraulic fluid temperature of measurement hydraulic system, and this hydraulic fluid temperature is transmitted to temperature controller 303；Wherein, state parameter also includes: hydraulic fluid temperature.Temperature controller passes through electromotor ECM obtains the temperature of electromotor, rotating speed and output moment of torsion, is obtained by hydraulic oil temperature sensor Obtain the temperature of hydraulic oil in hydraulic system, and combining environmental temperature performs device to fan speed-regulating and enters Row controls, thus regulates fan actual speed.

In certain embodiments, the state parameter of heat radiation object includes: engine temperature, start Machine rotating speed, engine output torque and hydraulic fluid temperature；Temperature controller is by engine temperature T_{Send out} Respectively with higher limit T of engine work temperature range_{Send out max}With lower limit T_{Send out min}Compare Relatively, and by hydraulic fluid temperature T_OilRespectively with the higher limit of hydraulic system normal working temperature scope T_{Oil max}With lower limit T_{Oil min}Compare, and determine fan target rotating speed according to comparative result.

In certain embodiments, when engine temperature and hydraulic system temperature, to be respectively less than it respective During the lower limit of normal working temperature scope, determine the minimum speed that fan target rotating speed is fan； As engine temperature T_{Send out}With hydraulic system temperature T_OilA temperature value in Er Zhe is corresponding at it In the range of normal working temperature, and another temperature value is not in its corresponding normal working temperature In the range of time, then determine fan mesh according to engine temperature and hydraulic system temperature alternative one Mark rotating speed, (such as starts so that being positioned at the relevant temperature value in the range of its normal working temperature Machine temperature or hydraulic system temperature) it is maintained in this temperature range as far as possible, and just it is not at it Often another temperature value (such as hydraulic system temperature or engine temperature) in operating temperature range In the range of heating up or being cooled to its normal working temperature；When engine temperature and hydraulic system temperature When being all higher than the higher limit of its respective normal working temperature scope, determine that fan target rotating speed is The maximum speed of fan.

For example, it is possible to determine fan target rotating speed according to following temperature conditions:

If T_{Send out}<T_{Send out min}And T_Oil<T_{Oil min}, due to now engine temperature and hydraulic system temperature The most relatively low, it is thus determined that fan target rotating speed is the minimum speed of fan so that electromotor and Hydraulic system can be warming up to normal temperature range as early as possible.

If T_{Send out min}≤T_{Send out}<T_{Send out max}And T_Oil<T_{Oil min}, or T_{Send out max}<T_{Send out}And T_{Oil min}≤T_Oil≤T_{Oil max}, it is determined that fan target rotating speed is according to engine temperature, electromotor Rotating speed, engine output torque and ambient temperature calculate the first fan target rotating speed obtained.This In, work as T_{Send out min}≤T_{Send out}<T_{Send out max}And T_Oil<T_{Oil min}Time determine that fan target rotating speed is above-mentioned first Fan target rotating speed, can make engine temperature be maintained at its normal working temperature taking into account as far as possible In the case of in the range of, hydraulic system temperature is made to be warmed up to the temperature that normally works of hydraulic system as early as possible In the range of degree；Work as T_{Send out max}<T_{Send out}And T_{Oil min}≤T_Oil≤T_{Oil max}Time determine that fan target rotating speed is upper State the first fan target rotating speed, can that hydraulic system temperature be made to be maintained at it be normal as far as possible taking into account In the case of in operating temperature range, engine temperature is made to be cooled to the normal work of electromotor as early as possible Make in temperature range.

If T_{Send out}<T_{Send out min}And T_{Oil min}≤T_Oil<T_{Oil max}Or T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil max}<T_Oil, it is determined that fan target rotating speed is according to hydraulic fluid temperature, engine speed, sends out Motivation output moment of torsion and ambient temperature calculate the second fan target rotating speed obtained.Here, when T_{Send out}<T_{Send out min}And T_{Oil min}≤T_Oil<T_{Oil max}Time determine that fan target rotating speed is above-mentioned second fan Rotating speed of target, can make hydraulic system temperature be maintained at its normal working temperature model taking into account as far as possible In the case of in enclosing, engine temperature is made to be warmed up to the normal working temperature scope of electromotor as early as possible In；Work as T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil max}<T_OilTime determine that fan target rotating speed is the second fan Rotating speed of target, can make engine temperature be maintained at its normal working temperature scope taking into account as far as possible In the case of Nei, make hydraulic system greenhouse cooling to the normal working temperature model of hydraulic system as early as possible In enclosing.

If T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil min}≤T_Oil≤T_{Oil max}, due to engine radiator and liquid Pressure system radiating device is to be placed in series, in order to meet the heat radiation need of electromotor and hydraulic system simultaneously Want, then compare the first fan target rotating speed and the second fan target rotating speed, determine that fan target turns Speed is the biggest one, so that the heat radiation of electromotor and hydraulic system needs all It is met.

If T_{Send out max}<T_{Send out}And T_{Oil max}<T_Oil, owing to the temperature of electromotor and hydraulic system is the most too high, It is thus determined that fan target rotating speed is the maximum speed of fan, with as early as possible by electromotor and hydraulic pressure system The temperature of system is reduced to normal temperature range.

In this embodiment, cooling control system controls rotation speed of the fan to engine radiator and liquid Pressure system radiating device all carries out (such as, engine radiator and the hydraulic system radiator string that dispel the heat Ally the communists with a fan 320) so that combine engine temperature and hydraulic system temperature Determine the fan target rotating speed under above-mentioned various temperature conditions, export to silicon by controlling hydraulic pump The silicone oil amount of oil clutch, thus the actual speed of fan is adjusted.Further, dissipate Thermal control system is according to the thermic load of the output power excavator of excavator, and then in difference Operating mode under can meet radiating requirements, improve the excavator cooling system adaptability to operating mode.

Describe in detail about before the computing formula of the first fan target rotating speed and process, be situated between below The computing formula of the second fan target rotating speed of continuing and process.

Temperature controller calculates the process of the second fan target rotating speed and includes: temperature controller according to Engine speed and engine output torque determine engine output；Export according to electromotor Power and hydraulic system thermic load account for the ratio of engine output and determine hydraulic system heat Load；Hydraulic system is determined according to hydraulic system thermic load, hydraulic system temperature and ambient temperature The coefficient of heat transfer of radiator；Coefficient of heat transfer according to hydraulic system radiator and the second fan mesh Proportionate relationship between mark rotating speed and the coefficient of heat transfer of hydraulic system radiator determines the second fan Rotating speed of target.

Such as, temperature controller calculates and obtains the second fan target rotating speed n_{Target 2}Formula include: P_Output=ω_{Send out}×M_Output, wherein, P_OutputFor engine output, ω_{Send out}For engine speed, M_Output For engine output torque；Q_Oil=k₂×P_Output, wherein, Q_OilFor hydraulic system thermic load, k₂For Hydraulic system thermic load accounts for the proportionality coefficient of engine output； Wherein, α_OilFor the coefficient of heat transfer of hydraulic system radiator, A_OilDissipating for hydraulic system radiator Hot side amasss, T_OilFor hydraulic fluid temperature, T_RingFor ambient temperature；And n_{Target 2}=k₄×α_Oil, wherein, k₄It it is the proportionality coefficient between the second fan target rotating speed and the coefficient of heat transfer of hydraulic system radiator.

In this embodiment, temperature controller calculates the second fan target rotating speed n_{Target 2}Process As follows:

(1) temperature controller obtains engine speed ω by electromotor ECM_{Send out}And electromotor Output moment of torsion M_Output, according to P_Output=ω_{Send out}×M_OutputObtain engine output P_Output。

(2) according to utilizing radiator to carry out hydraulic system thermic load Q cooled down_OilAccount for electromotor defeated Go out power P_OutputRatio, obtain Q_Oil=k₂×P_Output, k₂Electromotor is accounted for for hydraulic system thermic load The proportionality coefficient of output, can carry out value, such as, it is generally recognized that liquid based on experience value The efficiency of pressure system is 75%, then Q_OilAccount for the 25% of engine output, i.e. take k₂It is 0.25.

(3) simultaneously, Q_OilWith α_Oil、A_OilAnd T_Oil-T_RingExistence function relation Q_Oil=f{ α_Oil,A_Oil,(T_Oil-T_Ring), such as, Q_Oil=α_Oil×A_Oil×(T_Oil-T_Ring), thus obtainWherein, A_OilCan be determined by measurement etc., T_OilAnd T_RingPermissible Obtained by hydraulic oil temperature sensor and environment temperature sensor respectively.

(4)α_OilFor the coefficient of heat transfer of hydraulic system radiator, it is directly proportional to rotation speed of the fan, and Relevant with radiator material and radiator core structure, after radiator determines, affect its change Principal element is rotation speed of the fan, therefore can obtain the second fan target rotating speed n_{Target 2}=k₄×α_Oil, k₄It it is the ratio system between the second fan target rotating speed and the coefficient of heat transfer of hydraulic system radiator Number, can determine according to concrete operating mode, for example, it is possible to pass through meter according to the type selecting etc. of radiator Calculate or limited number of time experiment determines k₄。

In an embodiment of the present invention, temperature controller has pid control function, is obtaining After fan target rotating speed, search fan target rotating speed and proportionality coefficient kp, integration time constant TI, the corresponding relation of derivative time constant TD these three pid parameter, it is thus achieved that with above-mentioned wind Kp, TI and TD that fan rotating speed of target is corresponding, thus obtain according to parameter kp, TI and TD Input signal and the relation of output signal, to perform device output speed regulating control letter to fan speed-regulating Number.

For example, it is possible to experiment obtains the corresponding relation of fan target rotating speed and pwm signal in advance, Experiment the most in advance obtains the corresponding relation of fan target rotating speed and above three pid parameter size, And be stored in temperature controller；After temperature controller obtains fan target rotating speed, in lookup State relation, thus obtain the analog value of kp, TI and TD, and then obtain corresponding PWM Signal, i.e. speed regulating control signal.

Present invention also offers a kind of excavator, including: cooling control system as elucidated before, Such as, the radiating control device 300 shown in cooling control system 200 or Fig. 3 shown in Fig. 2.

Fig. 4 is the flow chart illustrating cooling control method according to some embodiments of the invention.

Step S401, measures state parameter and the ambient temperature of heat radiation object.

Step S403, exports speed regulating control signal according to state parameter and ambient temperature.Such as, Fan target rotating speed is obtained according to state parameter and ambient temperature, and according to this fan target rotating speed Output speed regulating control signal.

Step S405, according to speed regulating control Signal Regulation fan actual speed, to dispel the heat.

In this embodiment, it is for instance possible to use condition checkout gear and environment temperature sensor Measure state parameter and the ambient temperature of heat radiation object respectively, then can use temperature controller Being adjusted fan actual speed according to state parameter and ambient temperature, the method can reduce The power loss of electromotor, improves the work efficiency of excavator.

In certain embodiments, according to speed regulating control Signal Regulation fan actual speed, to carry out The step of heat radiation includes: uses motor to drive hydraulic pump operating, and receives speed regulating control signal, Rotating speed according to speed regulating control Signal Regulation hydraulic pump；Hydraulic pump is used to export to silicon oil clutch Silicone oil, and the silicone oil amount exported according to self rotational speed regulation；Silicon oil clutch is arranged on and starts Between machine and fan, according to the silicon fuel-flow control fan actual speed of input.

In certain embodiments, cooling control method also includes: measure fan actual speed；Sentence This fan actual speed disconnected is the most equal with fan target rotating speed, if unequal, the most defeated Go out speed regulating control signal, until adjusting fan actual speed to equal with fan target rotating speed.

In certain embodiments, the step of the state parameter measuring heat radiation object includes: measures and sends out The state parameter of motivation；Wherein, this state parameter includes: engine temperature, engine speed And engine output torque.

In certain embodiments, fan target rotating speed is obtained according to state parameter and ambient temperature Step includes: heat radiation object state parameter include: engine temperature, engine speed and send out Motivation output moment of torsion；By engine temperature T_{Send out}Upper with engine work temperature range respectively Limit value T_{Send out max}With lower limit T_{Send out min}Compare, and determine that fan target turns according to comparative result Speed.

In certain embodiments, if T_{Send out}<T_{Send out min}, it is determined that fan target rotating speed is fan Minimum speed；If T_{Send out min}≤T_{Send out}≤T_{Send out max}, it is determined that fan target rotating speed is according to electromotor Temperature, engine speed, engine output torque and ambient temperature calculate the first fan obtained Rotating speed of target；If T_{Send out}>T_{Send out max}, it is determined that fan target rotating speed is the maximum speed of fan.

In certain embodiments, turn round according to engine temperature, engine speed, electromotor output Square and ambient temperature calculate the step of acquisition the first fan target rotating speed and include: turn according to electromotor Speed and engine output torque determine engine output；According to engine output and Proportionate relationship between engine heat load and engine output determines engine heat load； The heat radiation of engine radiator is determined according to engine heat load, engine temperature and ambient temperature Coefficient；Coefficient of heat transfer according to engine radiator and the first fan target rotating speed and electromotor Proportionate relationship between the coefficient of heat transfer of radiator determines the first fan target rotating speed.

In certain embodiments, the described first fan target rotating speed n of acquisition is calculated_{Target 1}Formula bag Include: P_Output=ω_{Send out}×M_Output, wherein, P_OutputFor engine output, ω_{Send out}For engine speed, M_OutputFor engine output torque；Q_{Send out}=k₁×P_Output, wherein, Q_{Send out}For engine heat load, k₁ For the proportionality coefficient between engine heat load and engine output；Wherein, α_{Send out}For the coefficient of heat transfer of engine radiator, A_{Send out}For sending out The area of dissipation of motivation radiator, T_RingFor ambient temperature；And n_{Target 1}=k₃×α_{Send out}, wherein, k₃ It it is the proportionality coefficient between the first fan target rotating speed and the coefficient of heat transfer of engine radiator.

In certain embodiments, the step of the state parameter measuring heat radiation object also includes: measure The hydraulic fluid temperature of hydraulic system；Wherein, state parameter also includes: hydraulic fluid temperature.

In certain embodiments, fan target rotating speed is obtained according to state parameter and ambient temperature Step includes: heat radiation object state parameter include: engine temperature, engine speed, send out Motivation output moment of torsion and hydraulic fluid temperature；By engine temperature T_{Send out}Respectively with engine work Higher limit T of temperature range_{Send out max}With lower limit T_{Send out min}Compare, and by hydraulic fluid temperature T_OilRespectively with higher limit T of hydraulic system normal working temperature scope_{Oil max}With lower limit T_{Oil min} Compare, and determine fan target rotating speed according to comparative result.

In certain embodiments, when engine temperature and hydraulic system temperature, to be respectively less than it respective During the lower limit of normal working temperature scope, determine the minimum speed that fan target rotating speed is fan； As engine temperature T_{Send out}With hydraulic system temperature T_OilA temperature value in Er Zhe is corresponding at it In the range of normal working temperature, and another temperature value is not in its corresponding normal working temperature In the range of time, then determine fan mesh according to engine temperature and hydraulic system temperature alternative one Mark rotating speed, (such as starts so that being positioned at the relevant temperature value in the range of its normal working temperature Machine temperature or hydraulic system temperature) it is maintained in this temperature range as far as possible, and just it is not at it Often another temperature value (such as hydraulic system temperature or engine temperature) in operating temperature range In the range of heating up or being cooled to its normal working temperature；When engine temperature and hydraulic system temperature When being all higher than the higher limit of its respective normal working temperature scope, determine that fan target rotating speed is The maximum speed of fan.

In certain embodiments, if T_{Send out}<T_{Send out min}And T_Oil<T_{Oil min}, it is determined that fan target turns Speed is the minimum speed of fan；If T_{Send out min}≤T_{Send out}<T_{Send out max}And T_Oil<T_{Oil min}Or T_{Send out max}<T_{Send out}And T_{Oil min}≤T_Oil≤T_{Oil max}, it is determined that fan target rotating speed is according to electromotor temperature Degree, engine speed, engine output torque and ambient temperature calculate the first fan mesh obtained Mark rotating speed；If T_{Send out}<T_{Send out min}And T_{Oil min}≤T_Oil<T_{Oil max}Or T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil max}<T_Oil, it is determined that fan target rotating speed is according to hydraulic fluid temperature, engine speed, sends out Motivation output moment of torsion and ambient temperature calculate the second fan target rotating speed obtained；If T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil min}≤T_Oil≤T_{Oil max}, then the first fan target rotating speed and is compared Two fan target rotating speeds, determine that fan target rotating speed is the biggest one；If T_{Send out max}<T_{Send out}And T_{Oil max}<T_Oil, it is determined that fan target rotating speed is the maximum speed of fan.

In certain embodiments, turn round according to hydraulic fluid temperature, engine speed, electromotor output Square and ambient temperature calculate the step of acquisition the second fan target rotating speed and include: turn according to electromotor Speed and engine output torque determine engine output；According to engine output and Hydraulic system thermic load accounts for the ratio of engine output and determines hydraulic system thermic load；According to Hydraulic system thermic load, described hydraulic system temperature and ambient temperature determine hydraulic system radiator Coefficient of heat transfer；Coefficient of heat transfer according to hydraulic system radiator and the second fan target rotating speed And the proportionate relationship between the coefficient of heat transfer of hydraulic system radiator determines the second fan target rotating speed.

In certain embodiments, acquisition the second fan target rotating speed n is calculated_{Target 2}Formula include: P_Output=ω_{Send out}×M_Output, wherein, P_OutputFor engine output, ω_{Send out}For engine speed, M_Output For engine output torque；Q_Oil=k₂×P_Output, wherein, Q_OilFor hydraulic system thermic load, k₂For Hydraulic system thermic load accounts for the proportionality coefficient of engine output； Wherein, α_OilFor the coefficient of heat transfer of hydraulic system radiator, A_OilDissipating for hydraulic system radiator Hot side amasss, T_RingFor ambient temperature；And n_{Target 2}=k₄×α_Oil, wherein, k₄It it is the second fan mesh Proportionality coefficient between mark rotating speed and the coefficient of heat transfer of hydraulic system radiator.

In certain embodiments, according to the step bag of fan target rotating speed output speed regulating control signal Include: after obtaining fan target rotating speed, search fan target rotating speed and proportionality coefficient kp, integration Time constant TI, the corresponding relation of derivative time constant TD these three pid parameter, it is thus achieved that with Kp, TI and TD that this fan target rotating speed is corresponding, to export speed regulating control signal.

So far, the present invention is described in detail.In order to avoid covering the design of the present invention, do not have Details more known in the field are described.Those skilled in the art as described above, completely It can be appreciated how implement technical scheme disclosed herein.

The method and system of the present invention may be achieved in many ways.Such as, can pass through software, Hardware, firmware or software, hardware, any combination of firmware realize the present invention method and System.For the said sequence of step of described method merely to illustrate, the present invention's The step of method is not limited to order described in detail above, unless specifically stated otherwise. Additionally, in certain embodiments, the present invention also can be embodied as the journey recorded in the recording medium Sequence, these programs include the machine readable instructions for realizing the method according to the invention.Thus, The present invention also covers the record medium of the storage program for performing the method according to the invention.

Although some specific embodiments of the present invention being described in detail by example, But it should be appreciated by those skilled in the art, above example is not merely to illustrate, and not It is to limit the scope of the present invention.It should be appreciated by those skilled in the art, can without departing from In the case of scope and spirit of the present invention, above example is modified.The model of the present invention Enclose and be defined by the following claims.

Claims (21)

1. a cooling control system, it is characterised in that including:

Condition checkout gear, for measuring the state parameter of heat radiation object, and joins described state Number transmission is to temperature controller；

Environment temperature sensor, is used for measuring ambient temperature, and described ambient temperature is transmitted extremely Described temperature controller；

Temperature controller, performs to fan speed-regulating according to described state parameter and described ambient temperature Device output speed regulating control signal；And

Fan speed-regulating performs device, for turning according to described speed regulating control Signal Regulation fan is actual Speed, to dispel the heat.

Cooling control system the most according to claim 1, it is characterised in that

Described fan speed-regulating performs device and includes:

Motor, drives hydraulic pump operating, and receives described speed governing control from described temperature controller Signal processed, according to the rotating speed of described speed regulating control Signal Regulation hydraulic pump；

Hydraulic pump, exports silicone oil, and the silicon exported according to self rotational speed regulation to silicon oil clutch Oil mass；

Silicon oil clutch, is arranged between electromotor and fan, according to the silicon fuel-flow control of input Fan actual speed.

Cooling control system the most according to claim 1, it is characterised in that

The state parameter of described heat radiation object includes: engine temperature, engine speed and start Machine output moment of torsion；

Described temperature controller is by engine temperature T_{Send out}Respectively with engine work temperature model Higher limit T enclosed_{Send out max}With lower limit T_{Send out min}Compare, and determine fan according to comparative result Rotating speed of target, and perform device output tune according to described fan target rotating speed to described fan speed-regulating Speed control signal.

Cooling control system the most according to claim 3, it is characterised in that described temperature control Device processed uses following methods to determine fan target rotating speed:

If T_{Send out}<T_{Send out min}, it is determined that described fan target rotating speed is the minimum speed of fan；

If T_{Send out min}≤T_{Send out}≤T_{Send out max}, it is determined that start described according to described fan target rotating speed Machine temperature, described engine speed, described engine output torque and described ambient temperature calculate The the first fan target rotating speed obtained；

If T_{Send out}>T_{Send out max}, it is determined that described fan target rotating speed is the maximum speed of fan.

Cooling control system the most according to claim 4, it is characterised in that described temperature control Device processed uses following methods to determine the first fan target rotating speed:

Engine output is determined according to described engine speed and described engine output torque；

According to described engine output and engine heat load and engine output it Between proportionate relationship determine engine heat load；

Determine according to described engine heat load, described engine temperature and described ambient temperature and send out The coefficient of heat transfer of motivation radiator；

Coefficient of heat transfer according to described engine radiator and the first fan target rotating speed with start Proportionate relationship between the coefficient of heat transfer of machine radiator determines described first fan target rotating speed.

Cooling control system the most according to claim 5, it is characterised in that

Described temperature controller calculates and obtains described first fan target rotating speed n_{Target 1}Formula include:

P_Output=ω_{Send out}×M_Output,

Wherein, P_OutputFor engine output, ω_{Send out}For engine speed, M_OutputFor electromotor Output moment of torsion；

Q_{Send out}=k₁×P_Output,

Wherein, Q_{Send out}For engine heat load, k₁For engine heat load and engine output Between proportionality coefficient；

Wherein, α_{Send out}For the coefficient of heat transfer of engine radiator, A_{Send out}Dissipating for engine radiator Hot side amasss, T_RingFor ambient temperature；And

n_{Target 1}=k₃×α_{Send out},

Wherein, k₃It is between the first fan target rotating speed and the coefficient of heat transfer of engine radiator Proportionality coefficient.

Cooling control system the most according to claim 1, it is characterised in that

The state parameter of described heat radiation object includes: engine temperature, engine speed, start Machine output moment of torsion and hydraulic fluid temperature；

Described temperature controller is by engine temperature T_{Send out}Respectively with engine work temperature model Higher limit T enclosed_{Send out max}With lower limit T_{Send out min}Compare, and by hydraulic fluid temperature T_OilRespectively Higher limit T with hydraulic system normal working temperature scope_{Oil max}With lower limit T_{Oil min}Compare, And determine fan target rotating speed according to comparative result, and according to described fan target rotating speed to described Fan speed-regulating performs device output speed regulating control signal.

Cooling control system the most according to claim 7, it is characterised in that described temperature control Device processed uses following methods to determine fan target rotating speed:

If T_{Send out}<T_{Send out min}And T_Oil<T_{Oil min}, it is determined that described fan target rotating speed be fan The slow-speed of revolution；

If T_{Send out min}≤T_{Send out}<T_{Send out max}And T_Oil<T_{Oil min}Or T_{Send out max}<T_{Send out}And T_{Oil min}≤T_Oil≤T_{Oil max}, it is determined that described engine temperature according to described fan target rotating speed, Described engine speed, described engine output torque and described ambient temperature calculate the obtained One fan target rotating speed；

If T_{Send out}<T_{Send out min}And T_{Oil min}≤T_Oil<T_{Oil max}Or T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil max}<T_Oil, it is determined that described hydraulic fluid temperature according to described fan target rotating speed, described Motivation rotating speed, described engine output torque and described ambient temperature calculate the second fan obtained Rotating speed of target；

If T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil min}≤T_Oil≤T_{Oil max}, the most described first fan mesh Mark rotating speed and described second fan target rotating speed, determine that described fan target rotating speed is for both Bigger one；

If T_{Send out max}<T_{Send out}And T_{Oil max}<T_Oil, it is determined that described fan target rotating speed be fan High rotating speed.

Cooling control system the most according to claim 8, it is characterised in that described temperature control Device processed uses following methods to determine the second fan target rotating speed:

Engine output is determined according to described engine speed and described engine output torque；

Engine output is accounted for according to described engine output and hydraulic system thermic load Ratio determine hydraulic system thermic load；

True according to described hydraulic system thermic load, described hydraulic system temperature and described ambient temperature Determine the coefficient of heat transfer of hydraulic system radiator；

Coefficient of heat transfer according to described hydraulic system radiator and the second fan target rotating speed and liquid Proportionate relationship between the coefficient of heat transfer of pressure system radiating device determines described second fan target rotating speed.

Cooling control system the most according to claim 9, it is characterised in that

Described temperature controller calculates and obtains described second fan target rotating speed n_{Target 2}Formula bag Include:

P_Output=ω_{Send out}×M_Output,

Wherein, P_OutputFor engine output, ω_{Send out}For engine speed, M_OutputFor electromotor Output moment of torsion；

Q_Oil=k₂×P_Output,

Wherein, Q_OilFor hydraulic system thermic load, k₂Electromotor output is accounted for for hydraulic system thermic load The proportionality coefficient of power；

Wherein, α_OilFor the coefficient of heat transfer of hydraulic system radiator, A_OilFor hydraulic system radiator Area of dissipation, T_RingFor ambient temperature；And

n_{Target 2}=k₄×α_Oil,

Wherein, k₄It is between the second fan target rotating speed and the coefficient of heat transfer of hydraulic system radiator Proportionality coefficient.

11. 1 kinds of excavators, it is characterised in that including:

Cooling control system as described in claim 1 to 10 is arbitrary.

12. 1 kinds of cooling control methods, it is characterised in that including:

Measure state parameter and the ambient temperature of heat radiation object；

Speed regulating control signal is exported according to described state parameter and described ambient temperature；And

According to described speed regulating control Signal Regulation fan actual speed, to dispel the heat.

13. according to cooling control method described in claim 12, it is characterised in that according to described Speed regulating control Signal Regulation fan actual speed, includes with the step carrying out dispelling the heat:

Use motor to drive hydraulic pump operating, and receive described speed regulating control signal, according to institute State the rotating speed of speed regulating control Signal Regulation hydraulic pump；

Described hydraulic pump is used to export silicone oil to silicon oil clutch, and defeated according to self rotational speed regulation The silicone oil amount gone out；

Described silicon oil clutch is arranged between electromotor and fan, according to the silicone oil amount of input Regulation fan actual speed.

14. according to cooling control method described in claim 12, it is characterised in that according to described The step of state parameter and described ambient temperature output speed regulating control signal includes:

The state parameter of described heat radiation object includes: engine temperature, engine speed and start Machine output moment of torsion；

By engine temperature T_{Send out}Respectively with higher limit T of engine work temperature range_{Send out max} With lower limit T_{Send out min}Compare, and determine fan target rotating speed according to comparative result, and according to Described fan target rotating speed performs device output speed regulating control signal to described fan speed-regulating.

15. according to cooling control method described in claim 14, it is characterised in that below employing Method determines fan target rotating speed:

If T_{Send out}<T_{Send out min}, it is determined that described fan target rotating speed is the minimum speed of fan；

If T_{Send out min}≤T_{Send out}≤T_{Send out max}, it is determined that start described according to described fan target rotating speed Machine temperature, described engine speed, described engine output torque and described ambient temperature calculate The the first fan target rotating speed obtained；

If T_{Send out}>T_{Send out max}, it is determined that described fan target rotating speed is the maximum speed of fan.

16. according to cooling control method described in claim 15, it is characterised in that according to described Engine temperature, described engine speed, described engine output torque and described ambient temperature The step calculating acquisition the first fan target rotating speed includes:

Engine output is determined according to described engine speed and described engine output torque；

According to described engine output and engine heat load and engine output it Between proportionate relationship determine engine heat load；

Determine according to described engine heat load, described engine temperature and described ambient temperature and send out The coefficient of heat transfer of motivation radiator；

Coefficient of heat transfer according to described engine radiator and the first fan target rotating speed with start Proportionate relationship between the coefficient of heat transfer of machine radiator determines described first fan target rotating speed.

17. according to cooling control method described in claim 16, it is characterised in that

Calculate and obtain described first fan target rotating speed n_{Target 1}Formula include:

P_Output=ω_{Send out}×M_Output,

Wherein, P_OutputFor engine output, ω_{Send out}For engine speed, M_OutputFor electromotor Output moment of torsion；

Q_{Send out}=k₁×P_Output,

Wherein, Q_{Send out}For engine heat load, k₁For engine heat load and engine output Between proportionality coefficient；

Wherein, α_{Send out}For the coefficient of heat transfer of engine radiator, A_{Send out}Dissipating for engine radiator Hot side amasss, T_RingFor ambient temperature；And

n_{Target 1}=k₃×α_{Send out},

Wherein, k₃It is between the first fan target rotating speed and the coefficient of heat transfer of engine radiator Proportionality coefficient.

18. according to cooling control method described in claim 12, it is characterised in that according to described The step of state parameter and described ambient temperature output speed regulating control signal includes:

The state parameter of described heat radiation object includes: engine temperature, engine speed, start Machine output moment of torsion and hydraulic fluid temperature；

By engine temperature T_{Send out}Respectively with higher limit T of engine work temperature range_{Send out max} With lower limit T_{Send out min}Compare, and by hydraulic fluid temperature T_OilNormal with hydraulic system respectively Higher limit T of operating temperature range_{Oil max}With lower limit T_{Oil min}Compare, and according to comparing knot Fruit determines fan target rotating speed, and performs to described fan speed-regulating according to described fan target rotating speed Device output speed regulating control signal.

19. according to cooling control method described in claim 18, it is characterised in that below employing Method determines fan target rotating speed:

If T_{Send out}<T_{Send out min}And T_Oil<T_{Oil min}, it is determined that described fan target rotating speed be fan The slow-speed of revolution；

If T_{Send out min}≤T_{Send out}<T_{Send out max}And T_Oil<T_{Oil min}Or T_{Send out max}<T_{Send out}And T_{Oil min}≤T_Oil≤T_{Oil max}, it is determined that described engine temperature according to described fan target rotating speed, Described engine speed, described engine output torque and described ambient temperature calculate the obtained One fan target rotating speed；

If T_{Send out}<T_{Send out min}And T_{Oil min}≤T_Oil<T_{Oil max}Or T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil max}<T_Oil, it is determined that described hydraulic fluid temperature according to described fan target rotating speed, described Motivation rotating speed, described engine output torque and described ambient temperature calculate the second fan obtained Rotating speed of target；

If T_{Send out min}≤T_{Send out}≤T_{Send out max}And T_{Oil min}≤T_Oil≤T_{Oil max}, the most described first fan mesh Mark rotating speed and described second fan target rotating speed, determine that described fan target rotating speed is for both Bigger one；

If T_{Send out max}<T_{Send out}And T_{Oil max}<T_Oil, it is determined that described fan target rotating speed be fan High rotating speed.

20. according to cooling control method described in claim 19, it is characterised in that according to described Hydraulic fluid temperature, described engine speed, described engine output torque and described ambient temperature The step calculating acquisition the second fan target rotating speed includes:

Engine output is determined according to described engine speed and described engine output torque；

Engine output is accounted for according to described engine output and hydraulic system thermic load Ratio determine hydraulic system thermic load；

True according to described hydraulic system thermic load, described hydraulic system temperature and described ambient temperature Determine the coefficient of heat transfer of hydraulic system radiator；

Coefficient of heat transfer according to described hydraulic system radiator and the second fan target rotating speed and liquid Proportionate relationship between the coefficient of heat transfer of pressure system radiating device determines described second fan target rotating speed.

21. according to cooling control method described in claim 20, it is characterised in that

Calculate and obtain described second fan target rotating speed n_{Target 2}Formula include:

P_Output=ω_{Send out}×M_Output,

Wherein, P_OutputFor engine output, ω_{Send out}For engine speed, M_OutputFor electromotor Output moment of torsion；

Q_Oil=k₂×P_Output,

Wherein, Q_OilFor hydraulic system thermic load, k₂Electromotor output is accounted for for hydraulic system thermic load The proportionality coefficient of power；

Wherein, α_OilFor the coefficient of heat transfer of hydraulic system radiator, A_OilFor hydraulic system radiator Area of dissipation, T_RingFor ambient temperature；And

n_{Target 2}=k₄×α_Oil,

Wherein, k₄It is between the second fan target rotating speed and the coefficient of heat transfer of hydraulic system radiator Proportionality coefficient.