CN201405725Y - Crane and controllable cooling system thereof - Google Patents
Crane and controllable cooling system thereof Download PDFInfo
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- CN201405725Y CN201405725Y CN2009201538406U CN200920153840U CN201405725Y CN 201405725 Y CN201405725 Y CN 201405725Y CN 2009201538406 U CN2009201538406 U CN 2009201538406U CN 200920153840 U CN200920153840 U CN 200920153840U CN 201405725 Y CN201405725 Y CN 201405725Y
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Abstract
The utility model discloses a controllable cooling system. The cooling system comprises a main radiator and a heat exchanger; a fan is arranged in the main radiator; the water inlet of the heat exchanger is communicated with the cooling liquid outlet of an engine; the water outlet of the heat exchanger is communicated with the cooling liquid return port of the engine; and the radiator can be selectively connected between the cooling liquid outlet and the cooling liquid return port of the engine. The system is mainly characterized in that the fan is driven by a driving unit; the power of the driving unit is supplied by a power unit; and the system also comprises a first temperature sensor used for detecting the liquid temperature at the cooling liquid return port of the engine, a second temperature sensor used for detecting the air temperature at the air outlet of the radiator and a control device used for controlling the rotating speed of the driving unit according to the temperature signals of the first temperature sensor and the second temperature sensor. The system can regulate the heat radiating power of the cooling system according to the heat radiating capacity required by apower system, therefore the real-time change of the heat radiating power is realized according to the work requirement, the heat radiating efficiency is improved, and the waste of power is reduced.
Description
Technical field
The utility model relates to engineering machinery field, particularly a kind of controllable radiation system.In addition, the utility model also relates to a kind of construction machinery and equipment that comprises above-mentioned controllable radiation system.
Background technology
Along with the fast development of China's economic construction, market increases day by day for the demand of hoisting crane.And in engineering machinery field, large-scale construction machinery and equipment is especially in hoisting crane, because power system has very big power, the heat that need distribute will be bigger, natural cooling can not satisfy the requirement of machinery, therefore the cooling system of additive incrementation is a part indispensable in each construction machinery and equipment, and the quality of cooling system directly has influence on the quality of complete machine.Especially in hoisting crane, because the complete machine deadweight is higher, power system must have sizable power can satisfy machine requirement at big machinery, and therefore, the heat that need distribute also is very big.After the driving engine of employed full hair style hoisting crane generally was arranged in operator's compartment in the engineering at present, driving engine adopted the air draught type fan simultaneously.Because the air draught road of fan has been blocked a part by operator's compartment, radiating effect also is under some influence.Simultaneously, generally all will increase hydrodynamic retarder in the large-tonnage hoisting crane, hydrodynamic retarder also needs heat radiation, if merely increase the area of radiator, not only influences the inswept area of fan, and the big difficulty of also existence is being made and installed to excessive radiator.Present stage adopts the mode of two radiator tandems to solve the not good problem of goliath radiating effect in production reality mostly.
Please refer to Fig. 1, Fig. 1 is the structural representation of a kind of representative type cooling system in the prior art.
This cooling system also comprises an additional cooler that is positioned at the car load appropriate location except comprising a main radiator 16, promptly secondary radiator 15, increase cooling system power with this, improves radiating effect.During work, refrigerant fluid flows out from the coolant flow outlet 111 of driving engine 11, behind over-heat-exchanger 12 and change speed gear box 13, flows back to coolerstat 14.At this moment, if the temperature of refrigerant fluid is lower than 83 ℃, then coolerstat 14 is closed, and refrigerant fluid is answered back by the coolant flow of driving engine and 112 flowed back to driving engine, and this circulation is called short circle; If the temperature of refrigerant fluid is higher than 83 ℃, coolerstat 14 is opened, and refrigerant fluid enters main radiator 16, and 112 flows back to driving engine through answering back from the coolant flow of driving engine behind secondary radiator 15, the return water pipe, and this circulation is called main cycle.
Though the improvement of adopting above method that cooling system is carried out can be alleviated the problem of goliath heat radiation difficulty,, there is unavoidable contradiction in above-mentioned cooling system.In the prior art, fan is that after the chip type of radiator was selected, the rotating speed of fan was directly proportional with the rotating speed of driving engine by the engine control of hoisting crane in the main radiator.Hence one can see that, and when rotation speed of the fan was vertex, engine speed was for the highest; And the most dangerous operation point of hoisting crane cooling system is often at the maximum power point place, but near maximum torque point; This is because the heat radiation power of driving engine and the relation curve of rotating speed are not straight lines, but a curve that is similar to parabolic; If change speed gear box has retarder brake simultaneously, generally in engine speed was in the scope of 1000rpm-1700rpm, this scope had exactly contained the maximum engine torque point in the operation point of retarder brake; If retarder brake is opened, power system is in maximum heat radiation power demand point place, but because engine speed does not peak, promptly cooling system does not reach maximum power point, causes the heat-sinking capability deficiency easily.Therefore, when choosing radiator core fin,, then when working, engine governed speed can waste a large amount of power if with reference near the heat radiation power of driving engine maximum torque point; And if, can't satisfy the maximum engine torque heat radiation needs in when work again with reference near the heat radiation power the engine governed speed.Increasing a secondary radiator, in fact is exactly the dissipating area that has strengthened cooling system, does not fundamentally address the above problem.
In sum, fundamentally satisfy the real-time radiating requirements of crane power system, must look for another way.How controllably to adjust in real time the heat radiation power of cooling system, thereby satisfy the radiating requirements under the power system different operating state, just become the problem that those skilled in the art need solve.
The utility model content
The purpose of this utility model provides a kind of controllable radiation system, this system can adjust the heat radiation power of cooling system according to the needed heat dissipation capacity of power system, to realize that heat radiation power according to the job requirement real time altering, improves radiating efficiency, reduce power waste.Another purpose of the present utility model provides a kind of construction machinery and equipment that comprises above-mentioned controllable radiation system.
For solving the problems of the technologies described above, the utility model provides a kind of controllable radiation system, is used for construction machinery and equipment, comprises radiator and the fan that cooperates with described radiator; Described radiator is linked optionally with between the coolant flow outlet of driving engine of described construction machinery and equipment and coolant flow answer back, it is characterized in that, also comprise the drive element that is used to drive described fan, and the rotating speed of described drive element can be independent of the rotating speed adjustment of described driving engine, so that the rotating speed of the described fan of independent adjustment.
Preferably, also comprise second temperature sensor, control setup and coolerstat; Described second temperature sensor detects the fluid temperature that described coolant flow is answered back and located, and the fluid temperature signal is transferred to described control setup; Described control setup is controlled the closure or openness of described coolerstat according to described fluid temperature signal and predetermined policy.
Preferably, when the temperature of answering back when described coolant flow was lower than first predetermined temperature, described coolerstat was not opened; When temperature that described coolant flow is answered back is between described first predetermined temperature and second predetermined temperature, described coolerstat partly open; When the temperature of answering back when described coolant flow was higher than described second predetermined temperature, described coolerstat was all opened.
Preferably, the scope of described first predetermined temperature is 80 ℃ to 85 ℃; The scope of described second predetermined temperature is 92 ℃ to 98 ℃.
Preferably, described first predetermined temperature is 83 ℃; Described second predetermined temperature is 95 ℃.
Preferably, also comprise first temperature sensor, be used to detect the gas temperature at the air extractor duct place of described heat exchanger, and gas temperature signal is transferred to described control setup; Described control setup is controlled the rotating speed of described drive element according to described gas temperature signal and described fluid temperature signal and predetermined policy.
Preferably, described control setup is an electrohydraulic proportional control valve.
Preferably, described drive element is a HM Hydraulic Motor.
The utility model also provides a kind of construction machinery and equipment, comprises above-mentioned each described controllable radiation system.
Preferably, described construction machinery and equipment is specially hoisting crane.
Controllable radiation system provided by the utility model comprises at least one radiator, and it is selectively answered back with outlet of the coolant flow of driving engine and coolant flow and is communicated with.Said fans is arranged at beyond the radiator, and this fan is driven by the driver element of variable output, and the rotating speed of this driver element and the rotating speed of driving engine are irrelevant.In real work, the specified heat radiation power of controllable radiation system disposes with reference to the needed maximum heat radiation power of whole power system.When the required heat radiation power of the power system of complete machine from large to small the time, reduce the output of driver element, and then reduce the rotating speed of fan, controllable radiation system is adjusted to a suitable operation point, reduce unnecessary power waste.When the required heat radiation power of the power system of complete machine changes from small to big, increase the output of driver element, and then increase the rotating speed of fan, controllable radiation system is adjusted to more high-performance operation point, to satisfy the heat radiation requirement of power system.
Controllable radiation system provided by the utility model can either satisfy the heat radiation requirement of power system under the different operating state of complete machine according to its heat radiation power of heat radiation needs real time altering of the power system of complete machine, can solve the problem of power waste again.
Description of drawings
Fig. 1 is the structural representation of a kind of representative type cooling system in the prior art;
Fig. 2 provides the structural representation of a kind of specific embodiment of controllable radiation system for the utility model;
Fig. 3 provides the structural representation of a kind of specific embodiment of controlling and driving part in the controllable radiation system for the utility model;
The specific embodiment
Core of the present utility model provides a kind of controllable radiation system, and this system can be according to different heat radiation needs real time altering heat radiation powers, thereby the heat radiation needs that can either satisfy power system have solved the problem of power waste again.Another core of the present utility model provides a kind of construction machinery and equipment that comprises above-mentioned controllable radiation system.
In order to make those skilled in the art person understand the utility model scheme better, the utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 2, Fig. 2 provides the structural representation of a kind of specific embodiment of controllable radiation system for the utility model.
The controllable radiation system that a kind of specific embodiment of the utility model is provided comprises radiator 22, and it is selectively answered back with outlet of the coolant flow of driving engine and coolant flow and is communicated with.The inside of this radiator 22 is provided with fan 221, and this fan 221 is driven by the driver element 231 of variable output, and the rotating speed of the output speed of this driver element 231 and driving engine 24 does not have direct relation.When the required heat radiation power of the power system of complete machine from large to small the time, reduce the output of driver element, and then reduce the rotating speed of fan, controllable radiation system is adjusted to a suitable operation point, reduce unnecessary power waste.When the required heat radiation power of the power system of complete machine changes from small to big, increase the output of driver element, and then increase the rotating speed of fan, controllable radiation system is adjusted to more high-performance operation point, to satisfy the heat radiation requirement of power system.
In the controllable radiation system that the above-mentioned specific embodiment of the utility model is provided, do not use the driving engine of hoisting crane to come directly to provide power as fan, and be to use independent drive element to provide power for fan, also can use the incidental drive element of driving engine to provide power as fan, but the rotating speed of this drive element is not subjected to the restriction of engine speed, so just making does not have necessary relation between the rotating speed of the rotating speed of fan and driving engine, eliminated the restriction of engine speed, on the basis of satisfying the heat radiation needs, also avoided the waste of engine power rotation speed of the fan.
On the basis of the above-mentioned specific embodiment, this controllable radiation system can also comprise first temperature sensor 211 that is arranged on the driving engine 24 coolant flow return pipes, this first temperature sensor 211 is a gas temperature sensor, change in the control chip that electric signal is sent to control cock 234 in order to the gas temperature signal that will collect, its operating range is according to the difference of measuring medium in the real work and difference; Be arranged on driving engine 24 refrigerant fluids and flow out second temperature sensor 212 on the pipe, this second temperature sensor 212 is a fluid temperature sensor, is electric signal and is sent on the control chip in the control cock 234 in order to the fluid temperature signal transition that will collect.Control chip in the control cock 234 imports first temperature sensor 211 and second temperature sensor 212 into wherein electric signal and calculates and be transformed into pressure signal after synthetic, and with pressure signal output and act on the dynamical element 232, thereby the output of control dynamical element 232, and then change the output of power element 231 and the rotating speed of fan 221, thereby adjust heat radiation power.
In real work, the specified heat radiation power of controllable radiation system can dispose with reference to the needed maximum heat radiation power of whole power system.When the required heat radiation power of power system from large to small the time, first temperature sensor 211 is sent to the gas temperature signal that collects in the control chip (among the figure for illustrating) of control cock 234, simultaneously, second temperature sensor 212 also is sent to the fluid temperature signal that collects in the control chip of control cock 234, the temperature signal that control chip comes the two transmission converts pressure signal to after synthetic and this pressure signal is acted on the dynamical element 232 through calculating, reduce the horsepower output of dynamical element 232, thereby reduce the output of power element 231, and then the rotating speed of reduction fan 221, controllable radiation system is adjusted to a suitable operation point, reduce unnecessary power waste.When the required heat radiation power of power system changes from small to big, adjust to more high-performance operation point in the same way, to satisfy the heat radiation requirement of power system.When power system reached the operation point of required heat radiation power maximum, the operation point that controllable radiation system is adjusted to maximum power promptly can be the heat radiation power that power system provides maximum.
In the controllable radiation system that the above-mentioned specific embodiment of the utility model is provided, do not use the driving engine of hoisting crane to come directly to provide power as fan, and be to use driving engine subsidiary independent dynamical element and driver element to provide power for fan, so just make and directly do not get in touch between the rotating speed of the rotating speed of fan and driving engine, eliminated the restriction of engine speed, avoided the waste of engine power rotation speed of the fan; In addition, in the controllable radiation system that the above-mentioned specific embodiment provided, utilize temperature sensor to gather the temperature signal of cooling system, by the synthetic feedback signal of calculating the back as system, and this feedback signal is directly acted on the dynamical element of system, thereby the takeoff output of control actuating component and the rotating speed of fan by the takeoff output of control power system, its heat radiation power of heat radiation needs real time altering in the time of so just can be according to power system different operating state, the heat radiation requirement of power system under the different operating state can either be satisfied, the problem of power waste can be solved again.
On the basis of the above-mentioned specific embodiment, controllable radiation system provided by the utility model can also comprise H Exch 26, first coolant flow of this H Exch 26 is answered back and is connected with the coolant flow outlet of driving engine 24, its first coolant flow outlet is answered back with the coolant flow of driving engine 24 and is connected, second coolant flow of heat exchanger 26 is answered back to answer back with coolant flow with the coolant flow outlet of change speed gear box 25 respectively with second coolant flow outlet and is connected, is used for when change speed gear box 25 or hydrodynamic retarder (not shown) worked the high temperature oil of generation and dispels the heat.Refrigerant fluid flows out from the coolant flow outlet of driving engine 24, and behind change speed gear box 25 and H Exch 26, hi-heat refrigerant fluid is answered back from the coolant flow of driving engine 24 and flowed back to driving engine 24, realizes the heat radiation to change speed gear box.
On the basis of the above-mentioned specific embodiment, controllable radiation system provided by the utility model can also comprise coolerstat 27, between this coolerstat 27 can export at the coolant flow of driving engine 24 and coolant flow is answered back, in order to will after H Exch 26 heat radiations, flow back to the refrigerant fluid shunting of driving engine 24.The coolant flow outlet of driving engine 24 and coolant flow are answered back and are the normal open mouth, and refrigerant fluid flows back to driving engine 24 behind the interchange of heat through change speed gear box 25 and H Exch 26 after flowing out driving engine 24 from the coolant flow outlet.At this moment, if the temperature of refrigerant fluid is lower than 83 ℃, then coolerstat 27 is not opened, and refrigerant fluid directly flows back to the cavity of driving engine 24; If the temperature of refrigerant fluid is equal to or higher than 83 ℃ and be lower than 95 ℃, coolerstat 27 partly opens then, refrigerant fluid is divided into two parts, and a part flows back to the cavity of driving engine 24, and another part flows back to driving engine 24 after radiator 22 coolings; If the temperature of refrigerant fluid is equal to or higher than 95 ℃, then coolerstat 27 is opened fully, and refrigerant fluid all by flowing back to driving engine 24 after radiator 22 coolings, is finished cooling circulation.
Increased after the coolerstat, this controllable radiation system can just carry out the identification and the shunting of temperature at coolant flow before temperature sensor, make the radiating effect of this system better, and radiating efficiency is higher.
On the basis of the above-mentioned specific embodiment, one or more additional cooler can also be set, above-mentioned additional cooler can be arranged at the appropriate location of car load, can enlarge the dissipating area of cooling system like this, improves radiating efficiency.On the basis of the above-mentioned specific embodiment, additional cooler can not be the radiator that is provided with for engine radiating, it can be the radiator that is provided with for as parts such as tor-con, following vehicle hydraulic systems, this radiator also can be drawn a three-temperature sensor (fluid temperature sensor), the signal of this sensor causes on the chip of control cock 234 equally, and as a reference value adjusting dynamical element 232.
In the above-mentioned specific embodiment, the power element of controllable radiation system and dynamical element can be hydraulic control component.
Please refer to Fig. 3, Fig. 3 provides the structural representation of a kind of specific embodiment of controlling and driving part in the controllable radiation system for the utility model.
In this kind specific embodiment, the control and the driving of controllable radiation system are finished by Hydraulic Elements.Wherein, control element can be an electrohydraulic proportional control valve 234, its inside has the control chip (not shown), changing pressure signal into after the temperature signal that is come by the transmission of first temperature sensor 211 and second temperature sensor 212 (being shown among Fig. 2) is synthesized in control chip acts on the Variable plunger pump 232, the inside of this Variable plunger pump 232 has the swash plate (not shown) that can change angle, when the pressure signal of input changes, Variable plunger pump 232 in-to-in swash plate angles change, and corresponding change takes place the delivery rate of Variable plunger pump 232 immediately.Above-mentioned Variable plunger pump 232 is the dynamical element of controllable radiation system in this embodiment, the rotating speed of the power element HM Hydraulic Motor 231 of these Variable plunger pump 232 control system, when the delivery rate of Variable plunger pump 232 changes, the rotating speed of HM Hydraulic Motor 231 also takes place correspondingly to change, thereby the rotating speed that makes the fan 221 in the radiator takes place correspondingly to change, and adjusts the heat radiation power of radiator.Above-mentioned HM Hydraulic Motor can be constant displacement hydraulic motor, also is not limited to the use constant displacement hydraulic motor certainly, also can use the HM Hydraulic Motor of other type under the situation that does not influence functions of use.
In the above-mentioned specific embodiment, hydraulic reservoir 233 can also be set near the appropriate location the Variable plunger pump 232, this hydraulic reservoir 233 is connected with Variable plunger pump 232, so that provide and store hydraulic oil for Variable plunger pump 232 at any time.The material of this hydraulic reservoir 233 can be metallic material, certainly, also can be the other materials with certain leak tightness.
In the above-mentioned specific embodiment, the control element of controllable radiation system, dynamical element and driver element are Hydraulic Elements, hydraulicdriven power is big, cost is low and the controllability of pressure and flow is good, can either require to realize the real-time adjustment of heat radiation power according to the heat radiation of actuating unit, the problem of power waste can be solved again effectively, thereby the Expected Results that this controllable radiation system will reach can be realized preferably.
In the specific embodiment of controlling and driving part provided by the utility model, adopt Hydraulic Elements, but be not limited to the use Hydraulic Elements as elements such as power, drivings.
For example, can on the basis of the above-mentioned specific embodiment, use gas-pressure component, also can reach the Expected Results of automatic guidance heat radiation power as elements such as power, drivings.Use pneumatic transmission to have energy-conservation, pollution-free, low-cost, safe and reliable, advantages of simple structure and simple, and combine with microelectronics, electrical technology easily, form autonomous cruise speed system, can realize equally that heat radiation power that this controllable radiation system will reach is adjusted in real time and Expected Results such as minimizing power waste.
For example, can also use electric elementss such as direct current or AC servo motor to replace Hydraulic Elements, also can reach the Expected Results of automatic guidance heat radiation power.
In the above-mentioned specific embodiment, the shape of fan blade can be for trapezoidal, helps the blast that provides bigger, improves the radiating efficiency of controllable radiation system.Certainly, the blade of fan also is not limited to trapezoidal, also can use sickleshaped relatively more commonly used at present and other shape that does not influence functions of use.
Except controllable radiation system, the utility model also provides a kind of hoisting crane that comprises above-mentioned controllable radiation system, and the structure of other each several parts of this hoisting crane please refer to prior art, and this paper repeats no more.
More than controllable radiation system provided by the utility model is described in detail.Used specific case herein principle of the present utility model and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present utility model and core concept thereof.Should be understood that; for those skilled in the art; under the prerequisite that does not break away from the utility model principle, can also carry out some improvement and modification to the utility model, these improvement and modification also fall in the protection domain of the utility model claim.
Claims (10)
1, a kind of controllable radiation system is used for construction machinery and equipment, comprises radiator and the fan that cooperates with described radiator; Described radiator is linked optionally with between the coolant flow outlet of driving engine of described construction machinery and equipment and coolant flow answer back, it is characterized in that, also comprise the drive element that is used to drive described fan, and the rotating speed of described drive element can be independent of the rotating speed adjustment of described driving engine, so that the rotating speed of the described fan of independent adjustment.
2, controllable radiation system according to claim 1 is characterized in that, also comprises second temperature sensor, control setup and coolerstat; Described second temperature sensor detects the fluid temperature that described coolant flow is answered back and located, and the fluid temperature signal is transferred to described control setup; Described control setup is controlled the closure or openness of described coolerstat according to described fluid temperature signal and predetermined policy.
3, controllable radiation system according to claim 2 is characterized in that, when the temperature of answering back when described coolant flow was lower than first predetermined temperature, described coolerstat was not opened; When temperature that described coolant flow is answered back is between described first predetermined temperature and second predetermined temperature, described coolerstat partly open; When the temperature of answering back when described coolant flow was higher than described second predetermined temperature, described coolerstat was all opened.
4, controllable radiation system according to claim 3 is characterized in that, the scope of described first predetermined temperature is 80 ℃ to 85 ℃; The scope of described second predetermined temperature is 92 ℃ to 98 ℃.
5, controllable radiation system according to claim 4 is characterized in that, described first predetermined temperature is 83 ℃; Described second predetermined temperature is 95 ℃.
6, controllable radiation system according to claim 2 is characterized in that, also comprises first temperature sensor, is used to detect the gas temperature at the air extractor duct place of described heat exchanger, and gas temperature signal is transferred to described control setup; Described control setup is controlled the rotating speed of described drive element according to described gas temperature signal and described fluid temperature signal and predetermined policy.
7, controllable radiation system according to claim 2 is characterized in that, described control setup is an electrohydraulic proportional control valve.
8, controllable radiation system according to claim 1 is characterized in that, described drive element is a HM Hydraulic Motor.
9, a kind of construction machinery and equipment is characterized in that, comprises each described controllable radiation system of claim 1 to 8.
10, construction machinery and equipment according to claim 9 is characterized in that, is specially hoisting crane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201538406U CN201405725Y (en) | 2009-04-30 | 2009-04-30 | Crane and controllable cooling system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009201538406U CN201405725Y (en) | 2009-04-30 | 2009-04-30 | Crane and controllable cooling system thereof |
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| CN201405725Y true CN201405725Y (en) | 2010-02-17 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343804A (en) * | 2010-07-27 | 2012-02-08 | 徐州重型机械有限公司 | Movable type engineering machine and cooling system thereof |
| CN103140634A (en) * | 2010-12-28 | 2013-06-05 | 日立建机株式会社 | Cooling system for hybrid work machine |
| 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 |
| CN109098832A (en) * | 2018-08-28 | 2018-12-28 | 北京航天发射技术研究所 | A kind of Mobile Power Transmission assembly joint cooling system and control method |
| CN109335966A (en) * | 2018-11-02 | 2019-02-15 | 徐州金港起重机制造有限公司 | A kind of engine temperature test device of crane |
| CN114537541A (en) * | 2020-11-25 | 2022-05-27 | 陕西汽车集团有限责任公司 | All-wheel drive large transport tractor |
-
2009
- 2009-04-30 CN CN2009201538406U patent/CN201405725Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102343804A (en) * | 2010-07-27 | 2012-02-08 | 徐州重型机械有限公司 | Movable type engineering machine and cooling system thereof |
| CN103140634A (en) * | 2010-12-28 | 2013-06-05 | 日立建机株式会社 | Cooling system for hybrid work machine |
| CN103140634B (en) * | 2010-12-28 | 2016-01-27 | 日立建机株式会社 | The cooling system of hybrid power type working rig |
| 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 |
| CN109098832A (en) * | 2018-08-28 | 2018-12-28 | 北京航天发射技术研究所 | A kind of Mobile Power Transmission assembly joint cooling system and control method |
| CN109335966A (en) * | 2018-11-02 | 2019-02-15 | 徐州金港起重机制造有限公司 | A kind of engine temperature test device of crane |
| CN114537541A (en) * | 2020-11-25 | 2022-05-27 | 陕西汽车集团有限责任公司 | All-wheel drive large transport tractor |
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Granted publication date: 20100217 Termination date: 20180430 |