CN114059615A - Hydraulic excavator heat dissipation control method and system and hydraulic excavator - Google Patents
Hydraulic excavator heat dissipation control method and system and hydraulic excavator Download PDFInfo
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- CN114059615A CN114059615A CN202111189157.XA CN202111189157A CN114059615A CN 114059615 A CN114059615 A CN 114059615A CN 202111189157 A CN202111189157 A CN 202111189157A CN 114059615 A CN114059615 A CN 114059615A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F3/00—Dredgers; Soil-shifting machines
- E02F3/04—Dredgers; Soil-shifting machines mechanically-driven
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02F—DREDGING; SOIL-SHIFTING
- E02F9/00—Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
- E02F9/20—Drives; Control devices
- E02F9/22—Hydraulic or pneumatic drives
- E02F9/226—Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K13/00—Thermometers specially adapted for specific purposes
Abstract
The invention provides a hydraulic excavator heat dissipation control method, a hydraulic excavator heat dissipation control system and a hydraulic excavator, wherein the hydraulic excavator heat dissipation control method comprises the following steps: step S1, a plurality of mutually independent heat dissipation modules are arranged for a plurality of heating elements of the hydraulic excavator in a one-to-one correspondence manner; step S2, acquiring a front end temperature value and a rear end temperature value of the heating element and a target temperature value of the heating element; step S3, adjusting the heat dissipation power of the heat dissipation mechanism of the heat dissipation module according to the front end temperature value, the rear end temperature value, and the target temperature value, so that the rear end temperature value of the heating element is within the target temperature range. The independent heat dissipation module can realize dynamic and accurate heat dissipation control on the heating elements by combining the front-end temperature value, the rear-end temperature value and the target temperature value of each heating element, can avoid unnecessary heat dissipation consumption, can ensure that each heating element is at the optimal working temperature, and ensures that the hydraulic excavator can keep long-time reliable operation.
Description
Technical Field
The invention belongs to the technical field of earthwork engineering machinery, and particularly relates to a hydraulic excavator heat dissipation control method and system and a hydraulic excavator.
Background
The hydraulic excavator driven by a pure battery has the advantages of low noise, quick action response, low use cost and the like, and becomes an important direction for research of a plurality of manufacturers. However, the current difficulty is how to ensure that the battery capacity is utilized as much as possible and the continuous working time is prolonged on the premise of limited installation space and limited battery capacity. Solving this problem can be done from a number of directions, one important direction being to optimize the heat dissipation system. The good heat dissipation system can ensure stable work of each electrical module and prolong the service life of the electrical module. However, in the existing heat dissipation system, a heat sink is usually used to dissipate heat from a plurality of electrical components simultaneously. Because the optimal working temperature and the working state of each electrical element are inconsistent, the actual temperature of each electrical element is different, the existing scheme cannot accurately radiate heat for each electrical element, the consumption of electric quantity is increased, the working time of the hydraulic excavator is shortened indirectly, the modularization degree of the radiator is insufficient, and the installation space of the hydraulic excavator is usually narrow, so that the radiator is assembled and is inconvenient.
Disclosure of Invention
The invention mainly aims to provide a hydraulic excavator heat dissipation control method and system and a hydraulic excavator, and aims to solve the technical problems that the hydraulic excavator in the prior art is high in heat dissipation consumption and inconvenient in assembly of a radiator.
In order to achieve the above object, the present invention provides a heat dissipation control method for a hydraulic excavator, wherein the heat dissipation control method for the hydraulic excavator includes:
step S1, a plurality of mutually independent heat dissipation modules are arranged for a plurality of heating elements of the hydraulic excavator in a one-to-one correspondence manner;
step S2, acquiring a front end temperature value and a rear end temperature value of the heating element and a target temperature value of the heating element;
step S3, adjusting the heat dissipation power of the heat dissipation mechanism of the heat dissipation module according to the front end temperature value, the rear end temperature value, and the target temperature value, so that the rear end temperature value of the heating element is within the target temperature range.
In this embodiment of the present invention, step S3 specifically includes:
step S31, obtaining a front-end difference between the front-end temperature value and the target temperature value and a rear-end difference between the rear-end temperature value and the target temperature value;
and step S32, adjusting the heat dissipation power of the heat dissipation mechanism according to the rear end difference value and the front end difference value.
In this embodiment of the present invention, step S1 specifically includes: arranging a radiator, a liquid pump for pumping cooling liquid to the radiator and a radiating fan for cooling the radiator for a radiating mechanism of the radiating module;
step S32 specifically includes adjusting the rotational speed of the liquid pump and the rotational speed of the cooling fan according to the rear end difference and the front end difference.
In an embodiment of the present invention, the rotation speed of the liquid pump and the rotation speed of the heat dissipation fan are adjusted according to the following formulas:
P11＝Ka11*ΔT11+Kb11*ΔT12；
P12＝Ka12*ΔT11+Kb12*ΔT12；
wherein Ka11, Kb11, Ka12 and Kb12 are constants, Δ T11 is the front end difference, Δ T12 is the rear end difference, P11 is the adjustment value of the liquid pump, and P12 is the adjustment value of the cooling fan.
In an embodiment of the invention, Kb11 is greater than Ka11, and Kb12 is greater than Ka 12.
In the embodiment of the present invention, step S32 includes:
step S33, judging whether the rear end difference value is larger than a control error;
step S34, if the rear end difference is greater than the control error, step S32 is executed.
In the embodiment of the present invention, step S33 is followed by:
and step S35, closing the heat dissipation mechanism when the rear end difference value is less than or equal to the control error.
The invention also provides a hydraulic excavator heat dissipation control system, which comprises: the heat dissipation modules are arranged in one-to-one correspondence with the heating elements of the hydraulic excavator and comprise temperature measurement mechanisms for detecting the front end temperature and the rear end temperature of the heating elements and heat dissipation mechanisms for dissipating heat of the heating elements; a controller configured to obtain a target temperature value of the heating element and adjust a heat dissipation power of the heat dissipation mechanism according to the front end temperature value, the rear end temperature value, and the target temperature value.
In the embodiment of the invention, the temperature measuring mechanism comprises a front end temperature sensor and a rear end temperature sensor which are respectively and correspondingly positioned at the heat dissipation front end and the heat dissipation rear end of the heating element; the controller is configured to: acquiring a front-end difference value between the front-end temperature value and the target temperature value and a rear-end difference value between the rear-end temperature value and the target temperature value; and adjusting the heat dissipation power of the heat dissipation mechanism according to the rear end difference value and the front end difference value.
In the embodiment of the invention, the heat dissipation module comprises a cooling loop and a heat dissipation fan; a radiator for supplying cooling liquid to the heating element and a liquid pump for pumping the cooling liquid to the radiator are arranged in the cooling loop in series, and the liquid pump is positioned between the heating element and the radiator; the heat radiation fan is arranged corresponding to the heat radiator and used for cooling the heat radiator; the controller is configured to adjust a rotational speed of the liquid pump and a rotational speed of the heat dissipation fan according to the rear end difference and the front end difference.
In an embodiment of the present invention, the controller is configured to: adjusting the rotational speed of the liquid pump and the rotational speed of the heat dissipation fan according to the following formulas: p11 ═ Ka11 Δ T11+ Kb11 Δ T12; p12 ═ Ka12 Δ T11+ Kb12 Δ T12; wherein Ka11, Kb11, Ka12 and Kb12 are constants, Δ T11 is the front end difference, Δ T12 is the rear end difference, P11 is the adjustment value of the liquid pump, and P12 is the adjustment value of the cooling fan.
In an embodiment of the present invention, the heat dissipation mechanism further includes a reservoir installed in the cooling circuit and located between the heat generating element and the heat sink, and the reservoir is configured to store the cooling fluid and supply the cooling fluid to the heat sink.
In the embodiment of the invention, the heat dissipation control system of the hydraulic excavator further comprises a power supply for supplying power to the plurality of heat dissipation modules, and the plurality of heat dissipation modules are connected with the power supply in parallel.
The invention further provides a hydraulic excavator, which comprises a plurality of heating elements and the heat dissipation control system of the hydraulic excavator.
Through the technical scheme, the heat dissipation control system of the hydraulic excavator provided by the embodiment of the invention has the following beneficial effects:
the method comprises the steps of firstly configuring independent heat dissipation modules for each heating element of the hydraulic excavator, acquiring front-end temperature values of each heating element and rear-end temperature values of the heating elements in real time on the basis, dynamically monitoring the real-time temperature of each heating element, and adjusting the heat dissipation power of a heat dissipation mechanism corresponding to the heating element by combining with target temperature values of the heating elements until the rear-end temperature values of the heating elements are within a target temperature range. The independent heat dissipation module can realize dynamic and accurate heat dissipation control on the heating elements by combining the front-end temperature value, the rear-end temperature value and the target temperature value of each heating element, can avoid unnecessary heat dissipation consumption, can ensure that each heating element is at the optimal working temperature, and ensures that the hydraulic excavator can keep long-time reliable operation.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide an understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a flow chart illustrating a method for controlling heat dissipation of a hydraulic excavator according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for controlling heat dissipation of a hydraulic excavator according to another embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a hydraulic excavator according to an embodiment of the present invention;
fig. 4 is a control schematic diagram of a heat dissipation control system of a hydraulic excavator according to an embodiment of the present invention.
Description of the reference numerals
Detailed Description
The following detailed description of specific embodiments of the invention refers to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative and explanatory of the invention and are not restrictive thereof.
A hydraulic excavator heat dissipation control method and system according to the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1, in an embodiment of the present invention, a method for controlling heat dissipation of a hydraulic excavator is provided, where the method for controlling heat dissipation of a hydraulic excavator includes:
step S1, a plurality of mutually independent heat dissipation modules are arranged for a plurality of heating elements of the hydraulic excavator in a one-to-one correspondence manner;
step S2, acquiring a front end temperature value and a rear end temperature value of the heating element and a target temperature value of the heating element;
step S3, adjusting the heat dissipation power of the heat dissipation mechanism of the heat dissipation module according to the front end temperature value, the rear end temperature value, and the target temperature value, so that the rear end temperature value of the heating element is within the target temperature range.
It is understood that the heating element in the present embodiment may be a high-voltage distribution box, a four-in-one controller, or an oil pump motor in a hydraulic excavator. The heat dissipation mechanism can dissipate heat of the heating element in a liquid cooling or air cooling heat dissipation mode.
In this embodiment, first, an independent heat dissipation module is configured for each heating element of the hydraulic excavator, and on this basis, a front-end temperature value of each heating element and a rear-end temperature value of each heating element are obtained in real time, a real-time temperature of each heating element is dynamically monitored, and a heat dissipation power of a heat dissipation mechanism corresponding to the heating element is adjusted by combining a target temperature value of the heating element until the rear-end temperature value of the heating element is within a target temperature range. In this embodiment, the independent heat dissipation modules can realize dynamic and accurate heat dissipation control of the heating elements by combining the front-end temperature values, the rear-end temperature values and the target temperature values of the heating elements, avoid unnecessary heat dissipation consumption, ensure that the heating elements are all at the optimal working temperature, and ensure that the hydraulic excavator can keep long-time reliable operation.
In this embodiment of the present invention, step S3 specifically includes:
step S31, obtaining a front-end difference between the front-end temperature value and the target temperature value and a rear-end difference between the rear-end temperature value and the target temperature value;
and step S32, adjusting the heat dissipation power of the heat dissipation mechanism according to the rear end difference value and the front end difference value.
In this embodiment, a front end difference between the front end temperature value and the target temperature value, and a rear end difference between the rear end temperature value and the target temperature value are obtained specifically through the front end temperature value, the rear end temperature value and the target temperature value of the heating element, and the rear end difference and the front end difference of the heating element are combined to jointly adjust the heat dissipation power of the heat dissipation mechanism, so that the accuracy of adjusting the heat dissipation power can be improved.
In this embodiment of the present invention, step S1 specifically includes: arranging a radiator, a liquid pump for pumping cooling liquid to the radiator and a radiating fan for cooling the radiator for a radiating mechanism of the radiating module;
step S32 specifically includes adjusting the rotational speed of the liquid pump and the rotational speed of the cooling fan according to the rear end difference and the front end difference.
Specifically dispel the heat to heating element through the liquid cooling combination air-cooled mode in this embodiment, simultaneously according to the rotational speed of the common regulation liquid pump of rear end difference and front end difference and radiator fan's rotational speed, when front end difference and rear end difference are all great, can increase the rotational speed of liquid pump and radiator fan's rotational speed simultaneously, can improve heat dissipation mechanism's radiating power fast, thereby make the quick rear end temperature value of heating element ability resume to best operating temperature fast, and make heating element's rear end temperature value can be located the target temperature within range all the time.
In one embodiment, the rotational speed of the liquid pump and the rotational speed of the heat dissipation fan are adjusted specifically according to the following formulas:
P11＝Ka11*ΔT11+Kb11*ΔT12；
P12＝Ka12*ΔT11+Kb12*ΔT12；
wherein Ka11, Kb11, Ka12 and Kb12 are constants, Δ T11 is the front end difference, Δ T12 is the rear end difference, P11 is the adjustment value of the liquid pump, and P12 is the adjustment value of the cooling fan. As can be seen from fig. 4, T1 is a target temperature value, a11 and a12 are values detected by the front end temperature sensor and the rear end temperature sensor, respectively, and correspond to front end temperature value T11 and rear end temperature value T12, respectively, where the target temperature value is T1, Δ T11 is T11-T1, and Δ T12 is T12-T1. The specification of the heat radiation fan and the specification of the liquid pump can be selected in a targeted manner according to the heat productivity of the heating element, and Kb11, Ka11, Kb12 and Ka12 can be specifically selected according to the specifications of the heat radiation fan and the liquid pump. P11 is the adjustment value of liquid pump, and P12 is the adjustment value of radiator fan, and P11 and P12 are the current value, and the rotational speed of liquid pump and the rotational speed of radiator fan are adjusted to the concrete output liquid pump of formula and the heat dissipation adjustment value of formula in this embodiment, can further improve the accuracy of heat dissipation adjustment of heat dissipation module.
In an embodiment of the invention, Kb11 is greater than Ka11, and Kb12 is greater than Ka 12. In this embodiment, the weight of the control output value is increased by the rear-end difference value relative to the front-end difference value, so that the rear-end temperature value of the heating element is more likely to change in the adjustment process of the liquid pump and the cooling fan, the dynamic temperature change of the heating element can be quickly responded, and the situation of temperature adjustment lag can be avoided.
In the embodiment of the present invention, step S32 includes:
step S33, judging whether the rear end difference value is larger than a control error;
step S34, if the rear end difference is greater than the control error, step S32 is executed.
In the present embodiment, the control error is T1 ', the target temperature range is T1 ± T1 ', and when Δ T12 > T1 ', P11 is Ka11 × Δ T11+ Kb11 × Δ T12, and P12 is Ka12 × Δ T11+ Kb12 × Δ T12.
As shown in fig. 2, in the embodiment of the present invention, step S33 is followed by:
and step S35, closing the heat dissipation mechanism when the rear end difference value is less than or equal to the control error.
When Δ T12 is not less than T1' in this embodiment, P11 is 0, and P12 is 0, the heat dissipation mechanism is specifically closed according to the comparison of the rear end difference and the control error in this embodiment, so that unnecessary heat dissipation can be avoided, the energy consumption utilization rate is improved, and meanwhile, the situation that the operating temperature of the heating element is too low can be avoided, and the operating stability of the hydraulic excavator can be improved.
As shown in fig. 3 and 4, the present invention further provides a heat dissipation control system for a hydraulic excavator, where the heat dissipation control system 100 for a hydraulic excavator includes a plurality of heat dissipation modules 1 and a controller 2, the plurality of heat dissipation modules 1 are arranged in one-to-one correspondence with a plurality of heating elements 210 of the hydraulic excavator 200, and each heat dissipation module 1 includes a temperature measurement mechanism 11 for detecting a front end temperature and a rear end temperature of the heating element 210 and a heat dissipation mechanism 12 for dissipating heat of the heating element 210; the controller 2 is configured to acquire a target temperature value of the heat generating element 210, and adjust the heat dissipation power of the heat dissipation mechanism 12 according to the front end temperature value, the rear end temperature value, and the target temperature value.
It can be understood that the controller 2 in this embodiment has an analog input detection function and an output control function, the analog input port of the controller 2 can detect the front-end temperature value and the rear-end temperature value of each heating element 210 in real time, and the analog output port can control the heat dissipation power of each heat dissipation mechanism 12, and the controller 2 in this embodiment also has a programmable function, and the program has a function of dynamically adjusting the operation of each heat dissipation mechanism 12.
In this embodiment, a plurality of heat dissipation modules 1 of the heat dissipation control system 100 of the hydraulic excavator are modularized according to the heating element 210, so that the independent heat dissipation modules 1 can be configured for different heat dissipations in a selective manner, thereby reducing the consumption of high voltage electricity, and the independent heat dissipation modules 1 are smaller in size, and can be distributed according to the spatial characteristics of the hydraulic excavator 200, so that the space can be effectively utilized, and the front-end temperature values of the heating elements and the rear-end temperature values of the heating elements can be obtained in real time on the basis, the real-time temperature of the heating elements can be dynamically monitored, the heat dissipation power of a heat dissipation mechanism corresponding to the heating elements can be adjusted by combining the target temperature values of the heating elements, and the rear-end temperature values of the heating elements are within the target temperature range. In this embodiment, the independent heat dissipation module can realize dynamic and accurate heat dissipation control of the heating elements by combining the front-end temperature value, the rear-end temperature value and the target temperature value of each heating element, thereby avoiding unnecessary heat dissipation consumption, ensuring that each heating element is at the optimal working temperature, and ensuring that the hydraulic excavator can keep long-term reliable operation.
In the embodiment of the present invention, the temperature measuring mechanism 11 includes a front end temperature sensor 111 and a rear end temperature sensor 112 respectively corresponding to the heat dissipation front end and the heat dissipation rear end of the heating element 210; the controller 2 is configured to: acquiring a front-end difference value between a front-end temperature value and a target temperature value and a rear-end difference value between a rear-end temperature value and the target temperature value; and adjusting the heat dissipation power of the heat dissipation mechanism 12 according to the rear end difference value and the front end difference value.
In this embodiment, the front end temperature sensor 111 and the rear end temperature sensor 112 detect a front end temperature value and a rear end temperature value of the heating element respectively, obtain a front end difference between the front end temperature value and the target temperature value and a rear end difference between the rear end temperature value and the target temperature value, combine the data of the rear end difference and the front end difference of the heating element 210, adjust the heat dissipation power of the heat dissipation mechanism together, and improve the accuracy of adjusting the heat dissipation power.
As shown in fig. 3, in the embodiment of the present invention, the heat dissipation module 1 includes a cooling circuit and a heat dissipation fan 125; a radiator 121 for supplying the cooling liquid to the heat generating element 210 and a liquid pump 122 for pumping the cooling liquid to the radiator 121 are arranged in series in the cooling circuit, and the liquid pump 122 is positioned between the heat generating element 210 and the radiator 121; a heat radiation fan 125 disposed corresponding to the heat sink 121 and for cooling the heat sink 121; the controller 2 is configured to adjust the rotation speed of the liquid pump 122 and the rotation speed of the radiator fan 125 in accordance with the rear end difference and the front end difference. In the cooling circuit of this embodiment, the water outlet of the radiator 121, the liquid pump 122 and the heating element 210 are communicated with each other through the liquid inlet pipe 123, and the water outlet of the heating element 210 is communicated with the water return port of the radiator 121 through the liquid return pipe 124; in order to ensure the accuracy of temperature detection, the front-end temperature sensor 111 in the present embodiment is located on the coolant line between the liquid pump 122 and the heat-generating element 210, and the rear-end temperature sensor 112 is located on the coolant line between the cooling radiator 121 and the heat-generating element 210. When the front end difference value and the rear end difference value are all great, the rotating speed of the liquid pump 122 and the rotating speed of the cooling fan 125 can be simultaneously increased, the heat exchange power of the cooling mechanism 12 is accelerated, the cooling power of the cooling mechanism can be rapidly improved, so that the rear end temperature value of the heating element which can be rapid can be rapidly recovered to the optimal working temperature, and the rear end temperature value of the heating element can be always located in the target temperature range. In this embodiment, the most reasonable control values of the liquid pump 122 and the cooling fan 125 are obtained by performing dynamic control parameter adjustment according to the front-end temperature value, the rear-end temperature value, and the target temperature value of the heating element 210 and by combining the characteristic curves of the liquid pump 122 and the cooling fan 125. Specifically, the specification of the heat dissipation fan 125 and the specification of the liquid pump 122 in the present embodiment can be specifically selected according to the amount of heat generated by the heat generating element 210.
In an embodiment, the controller 2 is configured to: the rotational speed of the liquid pump 122 and the rotational speed of the radiator fan 125 are adjusted according to the following formulas: p11 ═ Ka11 Δ T11+ Kb11 Δ T12; p12 ═ Ka12 Δ T11+ Kb12 Δ T12; wherein Ka11, Kb11, Ka12 and Kb12 are constants, Δ T11 is a front-end difference, Δ T12 is a rear-end difference, P11 is an adjustment value of the liquid pump 122, and P12 is an adjustment value of the cooling fan 125. As shown in fig. 4, a11 and a12 are values detected by front end temperature sensor 111 and rear end temperature sensor 112, respectively, and correspond to front end temperature value T11 and rear end temperature value T12, respectively, and the target temperature value is T1, Δ T11 ═ T11-T1, Δ T12 ═ T12-T1. Kb11, Ka11, Kb12, Ka12 in this embodiment can be specifically set according to specifications of a cooling fan and a liquid pump, and can be data input in advance or adjustable data of a user according to actual use requirements, P11 is an adjustment value of a liquid pump, P12 is an adjustment value of the cooling fan, and P11 and P12 are current values.
In the embodiment of the present invention, the heat dissipating mechanism 12 further includes a memory 126 installed in the cooling circuit and located between the heat generating component 210 and the heat sink 121, and the memory 126 is used for storing the cooling liquid and providing the cooling liquid to the heat sink 121. The storage 126 in this embodiment may be an expansion tank for containing and storing cooling liquid, and the rear temperature sensor 112 is located between the storage 126 and the heating element 210 to ensure the accuracy of the temperature measurement of the heating element 210.
In the embodiment of the present invention, the heat dissipation control system 100 of the hydraulic excavator further includes a power supply 3 for supplying power to the plurality of heat dissipation modules 1, and the plurality of heat dissipation modules 1 are connected in parallel to the power supply 3. The power supply 3 in this embodiment can supply power to the plurality of independently arranged heat dissipation modules 1, thereby reducing the number of power supply components, optimizing the spatial arrangement of the hydraulic excavator 200, and the plurality of heat dissipation modules 1 are arranged in parallel, so that the normal heat dissipation of other heat dissipation modules 1 can be ensured under the condition that one heat dissipation module 1 has a power supply failure, and the heat dissipation stability of the hydraulic excavator 200 is improved.
The invention further provides a hydraulic excavator, wherein the hydraulic excavator 200 comprises a plurality of heating elements 210 and the hydraulic excavator heat dissipation control system 100, and the specific structure of the hydraulic excavator heat dissipation control system 100 refers to the above embodiment. Since the hydraulic excavator 200 adopts all technical solutions of all the embodiments described above, at least all the beneficial effects brought by the technical solutions of the embodiments described above are achieved, and no further description is given here.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (14)
1. A heat dissipation control method for a hydraulic excavator is characterized by comprising the following steps:
step S1, a plurality of mutually independent heat dissipation modules are arranged for a plurality of heating elements of the hydraulic excavator in a one-to-one correspondence manner;
step S2, acquiring a front end temperature value and a rear end temperature value of the heating element and a target temperature value of the heating element;
step S3, adjusting the heat dissipation power of the heat dissipation mechanism of the heat dissipation module according to the front end temperature value, the rear end temperature value, and the target temperature value, so that the rear end temperature value of the heating element is within the target temperature range.
2. The method for controlling heat dissipation of a hydraulic excavator according to claim 1, wherein step S3 specifically includes:
step S31, obtaining a front-end difference between the front-end temperature value and the target temperature value and a rear-end difference between the rear-end temperature value and the target temperature value;
and step S32, adjusting the heat dissipation power of the heat dissipation mechanism according to the rear end difference value and the front end difference value.
3. The method for controlling heat dissipation of a hydraulic excavator according to claim 2, wherein step S1 specifically includes: arranging a radiator, a liquid pump for pumping cooling liquid to the radiator and a radiating fan for cooling the radiator for a radiating mechanism of the radiating module;
step S32 specifically includes adjusting the rotational speed of the liquid pump and the rotational speed of the cooling fan according to the rear end difference and the front end difference.
4. The hydraulic excavator heat dissipation control method according to claim 3, wherein the rotation speed of the liquid pump and the rotation speed of the heat dissipation fan are adjusted according to the following formulas:
P11＝Ka11*ΔT11+Kb11*ΔT12；
P12＝Ka12*ΔT11+Kb12*ΔT12；
wherein Ka11, Kb11, Ka12 and Kb12 are constants, Δ T11 is the front end difference, Δ T12 is the rear end difference, P11 is the adjustment value of the liquid pump, and P12 is the adjustment value of the cooling fan.
5. The hydraulic excavator heat dissipation control method of claim 4, wherein Kb11 is greater than Ka11 and Kb12 is greater than Ka 12.
6. The hydraulic excavator heat dissipation control method according to claim 2, wherein step S32 is preceded by:
step S33, judging whether the rear end difference value is larger than a control error;
step S34, if the rear end difference is greater than the control error, step S32 is executed.
7. The hydraulic shovel heat dissipation control method according to claim 6, wherein step S33 is followed by:
and step S35, closing the heat dissipation mechanism when the rear end difference value is less than or equal to the control error.
8. A hydraulic shovel heat dissipation control system, characterized in that the hydraulic shovel heat dissipation control system (100) includes:
the heat dissipation device comprises a plurality of heat dissipation modules (1) and a plurality of heat generation elements (210) of a hydraulic excavator (200), wherein the heat dissipation modules (1) are arranged in a one-to-one correspondence manner, and each heat dissipation module (1) comprises a temperature measurement mechanism (11) for detecting the front end temperature and the rear end temperature of each heat generation element (210) and a heat dissipation mechanism (12) for dissipating heat of each heat generation element (210);
a controller (2) configured to acquire a target temperature value of the heat generating element (210) and adjust a heat dissipation power of the heat dissipation mechanism (12) according to the front end temperature value, the rear end temperature value, and the target temperature value.
9. The heat dissipation control system of the hydraulic excavator according to claim 8, wherein the temperature measuring mechanism (11) comprises a front end temperature sensor (111) and a rear end temperature sensor (112) which are respectively correspondingly positioned at the heat dissipation front end and the heat dissipation rear end of the heating element (210);
the controller (2) is configured to:
acquiring a front-end difference value between the front-end temperature value and the target temperature value and a rear-end difference value between the rear-end temperature value and the target temperature value;
and adjusting the heat dissipation power of the heat dissipation mechanism (12) according to the rear end difference value and the front end difference value.
10. The hydraulic excavator cooling control system according to claim 9, wherein the cooling module (1) comprises a cooling circuit and a cooling fan (125);
a radiator (121) for supplying the cooling liquid to the heating element (210) and a liquid pump (122) for pumping the cooling liquid to the radiator (121) are arranged in the cooling circuit in series, and the liquid pump (122) is positioned between the heating element (210) and the radiator (121);
the heat radiation fan (125) is arranged corresponding to the heat radiator (121) and is used for cooling the heat radiator (121);
the controller (2) is configured to adjust the rotational speed of the liquid pump (122) and the rotational speed of the heat dissipation fan (125) in accordance with the rear end difference and the front end difference.
11. The hydraulic excavator heat dissipation control system of claim 10,
the controller (2) is configured to:
-adjusting the rotational speed of the liquid pump (122) and the rotational speed of the heat dissipation fan (125) according to the following formulas:
P11＝Ka11*ΔT11+Kb11*ΔT12；
P12＝Ka12*ΔT11+Kb12*ΔT12；
wherein Ka11, Kb11, Ka12 and Kb12 are constants, Δ T11 is the front end difference, Δ T12 is the rear end difference, P11 is the adjustment value of the liquid pump (122), and P12 is the adjustment value of the heat dissipation fan (125).
12. The hydraulic excavator heat dissipation control system according to claim 10, wherein the heat dissipation mechanism (12) further includes a reservoir (126) mounted to the cooling circuit between the heat generating element (210) and the radiator (121), the reservoir (126) being configured to store a coolant and supply the coolant to the radiator (121).
13. The hydraulic excavator heat dissipation control system according to any one of claims 8 to 12, wherein the hydraulic excavator heat dissipation control system (100) further includes a power supply source (3) that supplies power to the plurality of heat dissipation modules (1), and the plurality of heat dissipation modules (1) are connected in parallel to the power supply source (3).
14. A hydraulic excavator (200), wherein the hydraulic excavator (200) comprises a plurality of heat generating elements (210) and the hydraulic excavator heat dissipation control system (100) of any one of claims 8 to 13.
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