• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The invention relates to a mobile working machine, particularly in the form of a dump truck or truck having a diesel-electric drive system and a cooling system, wherein a common cooling circuit of a liquid fluid of cooling is arranged for parallel cooling of one or more components of a power electronics (100) and one or more drive components in a surrounding area of a driven vehicle axis.
    公开号:FR3021911A1
    申请号:FR1554906
    申请日:2015-05-29
    公开日:2015-12-11
    发明作者:Sebastien Nicolas Hoffmann；Kai Kugelstadt；Burkhard Richthammer
    申请人:Liebherr Mining Equipment Colmar SAS；
    IPC主号:
    专利说明:

    [0001] The invention relates to a mobile working machine, particularly in the form of a dump truck or a truck, comprising a diesel-electric drive system and a cooling system.
    [0002] Tipper trucks or large dump trucks are used primarily for the extraction of coal or the extraction of ores for the transportation of coal, minerals and ores. These bulk trucks are manufactured in sizes from over 90 t (90,000 kg) up to multiples of 100 t in weight and load, so they have very large overall dimensions. A diesel-electric engine is used as drive means, the mechanical energy generated by a diesel engine being converted using a generator into electrical energy to power the electrical drive means. The reason for this is that diesel engines, like all internal combustion engines, can only operate at ideal efficiency within a very limited speed range and can not be started under load. AC motors for drive shafts can produce the desired torque also in the lower part of the speed range to start. The internal combustion engine can operate continuously in the ideal speed range. Before, various components of the drive system needing to be cooled, were cooled by separate cooling systems, which led, due to the resulting vehicle design, to significant efforts in the production such dump trucks.
    [0003] In addition, to avoid the situation, the entry of the cooling system of the vehicle is typically arranged at the front of the vehicle but the cooling components of the diesel-electric drive system are located rather at the rear. The transmission oil to be cooled is usually transported from the rear of the vehicle in the direction of the heat exchangers mounted at the front of the vehicle to utilize the cooling effect of the airflow. This means that the hot oil is transported disadvantageously in front of the internal combustion engine, resulting in a huge risk of fire.
    [0004] The object of the invention is to present an improved cooling system of a working machine of this type. The object of the invention is achieved with a mobile working machine, especially in the form of a dump truck or truck, having a diesel-electric drive system and a cooling system, in which a common cooling circuit a coolant fluid is arranged for parallel cooling of one or more components of a power electronics and one or more drive components in a surrounding area of a driven vehicle axis. According to advantageous embodiments of the invention, the mobile working machine may also have at least one of the following additional features, considered alone or in combination: the components to be cooled in the surrounding zone of a driven vehicle shaft are one or more electric motors for driving the vehicle shaft; the components to be cooled in the surrounding area of a driven vehicle shaft are one or more transmissions, in particular planetary transmissions, by means of which the torque of one or more electric motors is transmitted to the vehicle axle or wheel hub; the cooling capacity of the cooling fluid is made available to the transmission transmission oil used via one or more heat exchangers, the heat exchangers being disposed close to or in the zone of surrounding of the axis; driven vehicle; one or more components of the power electronics are one or more frequency converters and / or the generator of the diesel-electric drive system; the circulation of the cooling fluid in the cooling circuit is arranged in such a way that the components to be cooled with a higher cooling requirement are cooled or run first, whereas components with a lower cooling requirement are disposed downstream in the cooling circuit; the components with a higher cooling requirement comprise one or more components of the power electronics while the components having a lower cooling requirement include one or more transmissions, including planetary transmissions, in the surrounding area of the power electronics; driven vehicle shaft; The common cooling circuit is arranged in such a way that at least some of the components to be cooled of the power electronics are cooled or traversed by the cooling fluid of the common cooling circuit, while one or more transmissions are cooled or run in a subordinate manner; the cooling fluid passes through a cooling module arranged as a heat sink in the front part of the working machine and is transported from there via one or more pumps in the direction of the components to be cooled in the rear part of the vehicle.
    [0005] According to the invention, a common cooling circuit is provided which comprises a coolant fluid for parallel cooling of one or more components of a power electronics of the diesel-electric drive system and for the cooling of one or more driving components in a surrounding area of a driven vehicle axis. The necessary flow path of the coolant fluid is minimized by the use of a common cooling circuit. An effective cooling effect can be achieved by shortened flow paths. At the same time, the complexity of the working machine is reduced by the fact that it is no longer necessary to provide and maintain separate cooling systems. Water and glycol, for example, can be considered as coolant used. The component or components of the driven vehicle shaft which are to be driven are, for example, one or more electric motors of the diesel drive system which drive, for example, in pairs the wheels of the driven shaft. The rear axle is typically the driven axis of the mobile work machine. It is conceivable that the electric motors drive the associated axle portions or wheel hubs at a transformed speed via appropriate transmissions. The transmission oil used can also be cooled by the common cooling circuit. Often, one or more planetary transmissions which are integrated in the wheel hubs and which transmit the output torque of the electric motors to the wheel axle or the wheel hub, are used as such transmissions. The cooling of the transmission oil can be carried out using one or more heat exchangers for cooling the oil. The necessary heat exchangers are arranged, for example, close to the transmission to keep the flow of the transmission oil as short as possible. Such an arrangement is conceivable in the region of the driven vehicle axis or in the area between the driven axis and the power electronics or, particularly preferably, in the area between the generator and the power electronics. Thus, the cooling fluid of the common cooling circuit passes through the electric motors used, on the one hand, and by the transmission or transmissions, in particular planetary transmissions, that is to say the heat exchangers used, on the other hand go. The advantageous arrangement of the heat exchangers makes the transport of the hot transmission oil from the trailing rear axle towards the front of the superfluous vehicle; the risk that the oil ignites is reduced. One or more components of the power electronics to be cooled are, for example, one or more frequency converters for adjusting the electric motor (s) of the driven shaft. In this context, the generator of the diesel-electric drive system is also understood as a component to be cooled. The component or components of the power electronics are traversed in a manner known per se by the cooling fluid of the common cooling circuit and are effectively cooled. Circulation is preferably carried out within the cooling circuit so that components having a higher cooling requirement are cooled or traveled in priority, while components with a lower cooling requirement are disposed downstream in the cooling circuit. cooling system. The components of the power electronics, for example, need to be cooled much more and need a lower coolant temperature since the normal operating temperature is lower. The transmission oil used of one or more transmissions to be cooled is, on the contrary, less demanding and has a lower cooling requirement so that the temperature of the cooling fluid can be higher to obtain sufficient cooling. For this reason, it is proposed, according to an advantageous embodiment of the invention, that the cooling fluid of the common cooling circuit cools first, or passes first, the components of the power electronics. such as frequency converters, and / or electric motors of the driven shaft and is then supplied to one or more heat exchangers for cooling the transmission oil of the transmission types used in the driven vehicle shaft. The common cooling circuit is advantageously arranged so that at least some of the components to be cooled with similar cooling needs are cooled or run in parallel. Thus, it can be provided that, for example, the components of the power electronics and / or at least one of the electric motors are cooled or run in parallel by the cooling fluid of the common cooling circuit, while the one or more Transmissions from the driven vehicle shaft are cooled or subsequently traveled. According to a preferred embodiment of the invention, the cooling fluid passes through a liquid cooling module arranged as a heat sink in the front part of the working machine and is transported from there via one or more pumps in the direction of the machine. components to be cooled in the rear of the vehicle.
    [0006] Other features, details and advantages of the invention are described with the aid of the embodiment shown in the drawing where: FIGS. 1 to 4 are a plurality of representations of a dump truck according to the invention FIG. 5 is a detailed perspective view of the chassis of the truck according to the invention, and FIG. 6 is a schematic representation of a cooling fluid circuit of the dump truck according to the invention. A dump truck 10 is shown in Figures 1 to 4. This is a large dump truck as used for example in ore mines. Front wheels 14 and rear wheels 16, driven by electric motors not shown in greater detail, are supported by a rigid frame 12. The rear wheels 16 are shown with double tires. A tipper 18 is pivotally mounted on the frame 12 and is adapted to be pivotable with hydraulic cylinders 20 disposed on both sides of the vehicle. The vehicle is bordered by a bumper 22 in the front part of the vehicle 10, seen in the direction of travel. A radiator module 24 is arranged above the bumper 22. An upper plate 26, on which an operator's cab 28 is arranged, extends over the entire width of the dump truck 10 above the module. In the embodiment shown here, the operator's cab 28 is disposed on the side of the upper plate 26 of the left side, seen in the direction of travel. Thus, the operator's cabin is located above the left front wheel 14. The dump truck 10 comprises a diesel-electric drive system 35 which is easily recognizable in the detailed perspective view of the frame 12 in the figure 5. The drive system comprises a diesel engine 40 mounted in the front area of the chassis 12, as viewed in the direction of travel. The internal combustion engine 40 is in particular located in the zone of the front axle 14 below the upper plate 26 and the operator's cab 28. The radiator module 24 is located directly in front of the internal combustion engine 40. the front of the vehicle. The internal combustion engine 40 drives the generator 60 mechanically to generate the electrical energy necessary for the electric drives. Two AC motors 80, which are integrated left and right in the rear axle 16, are used to drive the vehicle. A power electronics 100 comprising the necessary components such as, for example, frequency converters, etc. is provided for the control and regulation of the electric motors 80 and the generator 60. The two electric motors 80 drive the left and right wheel hubs of the driven rear axle 16 independently of one another. The drive is performed via planetary transmissions not shown in FIG. 5. Each electric motor 80 is connected to the wheel hub of the driven rear axle 16 via a planetary transmission.
    [0007] Both the power electronics 100 and the oil used for planetary transmissions must be cooled during the operation of the dump truck 10. The new cooling circuit according to the invention is used for this purpose. The cooling circuit uses a liquid coolant, for example water or glycol, which is cooled by the radiator module 24 as a heat sink. The cooling fluid is transported via cooling ducts by means of one or more hydraulic pumps 65 in the rear part of the chassis 12 of the vehicle.
    [0008] In the embodiment shown, the hydraulic pump or pumps 65 are slaved by a power output of the pump transmission box 50 which is arranged directly at the output of the generator. The pump transmission housing 50 to which the hydraulic pumps 65 are coupled is integrated in the cooling circuit. The transmission housing 50 may, however, be disposed directly to the internal combustion engine 40 or the generator 60 or between the generator 60 and the internal combustion engine 40. The pump 65 carries the hydraulic fluid from the front portion of the truck 10 in the direction of the power electronics 100 so that these components, including the frequency converters, are cooled or traversed by the coolant transported and cooled to the desired operating temperature. In addition, the cooling fluid is supplied to one or more heat exchangers 90, preferably a planetary transmission heat exchanger, mounted in the area in front of the power electronics 100, viewed from the front of the vehicle. in order to cool the transmission oil used of the planet gearings in the driven rear axle 16. For this purpose, the oil is conveyed from the rear axle 16 to the heat exchangers 90. in addition to being transported to the electric motors 80 downstream of the coolers of the transmission oil. The invention discloses a single cooling circuit for the stated components, which extends from the front of the vehicle chassis 12 to the rear of the vehicle. Coolant circulation is limited to the chassis area, with short conduit paths for efficient cooling. Expansion vessel 70 is additionally provided to compensate for temperature fluctuations of the coolant.
    [0009] Figure 6 is a schematic representation of the cooling circuit. The cooling fluid used is conveyed from the radiator module 24 as a heat sink via the pump 65 in the direction of the power electronics 100 and the heat exchangers 90. Since the frequency converters of the power electronics 100 require a lower operating temperature level, here less than 65 ° C, the fluid cooled by the radiator module 24 (temperature below 55 ° C) is transported in priority to these components 100. After going through these sources of heat, the coolant has a temperature of the order of 65 ° C, which is sufficient for the cooling of the transmission oil. As a result, the heat exchangers 90 are connected downstream of the power electronics 100 in the coolant flow. The heat exchangers 90 are also traversed by the coolant, parallel to each other. The design according to the invention makes it possible to use a common cooling circuit for the components to be cooled, such as the number of cooling circuits, etc. is reduced and sufficiently efficient cooling is nevertheless ensured.
    权利要求:
    Claims (9)
    [0001]
    REVENDICATIONS1. Mobile work machine, especially in the form of a dump truck (10) or truck, having a diesel-electric drive system and a cooling system, characterized in that a common cooling circuit of a coolant fluid is arranged for parallel cooling of one or more components of a power electronics (100) and one or more drive components (80) in an area of surrounding a driven axis. of vehicle (16).
    [0002]
    Mobile working machine according to claim 1, characterized in that the components to be cooled in the surrounding area of a driven vehicle shaft (16) are one or more electric motors (80) for driving the drive. the vehicle axis. 20
    [0003]
    Mobile working machine according to one of the preceding claims, characterized in that the components to be cooled in the surrounding area of a driven vehicle shaft are one or more transmissions, in particular planetary transmissions, using from which the torque of one or more electric motors (80) is transmitted to the vehicle axle or the wheel hub.
    [0004]
    4. Mobile working machine according to claim 3, characterized in that the cooling capacity of the cooling fluid is made available to the transmission transmission oil used via one or more heat exchangers, the heat exchangers being disposed near or in the surrounding area of the driven vehicle shaft (16).
    [0005]
    Mobile working machine according to one of the preceding claims, characterized in that one or more components of the power electronics (100) are one or more frequency converters and / or the generator (60) of the control system. diesel-electric drive.
    [0006]
    Mobile working machine according to one of the preceding claims, characterized in that the circulation of the cooling medium in the cooling circuit is arranged in such a way that the components to be cooled with a higher cooling requirement are cooled or traversed in first while components having a lower cooling requirement are disposed downstream in the cooling circuit.
    [0007]
    Mobile working machine according to claim 6, characterized in that the components having a higher cooling requirement comprise one or more components of the power electronics (100) while the components having a lower cooling requirement comprise a or a plurality of transmissions, especially planetary transmissions, in the surrounding area of the driven vehicle axis (16).
    [0008]
    Mobile working machine according to claim 7, characterized in that the common cooling circuit is arranged in such a way that at least some of the components to be cooled of the power electronics (100) are cooled or traversed by the cooling fluid of the common cooling circuit, while one or more transmissions are cooled or run in a subordinate manner.
    [0009]
    9. Mobile working machine according to one of the preceding claims, characterized in that the cooling fluid passes through a cooler module arranged as a heat sink in the front part of the working machine and is transported from there via one or more pumps (65) in the direction of the components to be cooled in the rear part of the vehicle.
    类似技术:
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    同族专利:
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    RU2015121381A3|2018-12-07|
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    AU2015202790A1|2015-12-24|
    US9604532B2|2017-03-28|
    DE102015007235A1|2015-12-10|
    FR3021911B1|2021-11-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    法律状态:
    2016-05-12| PLFP| Fee payment|Year of fee payment: 2 |
    2017-05-25| PLFP| Fee payment|Year of fee payment: 3 |
    2018-05-17| PLFP| Fee payment|Year of fee payment: 4 |
    2019-05-24| PLFP| Fee payment|Year of fee payment: 5 |
    2020-05-23| PLFP| Fee payment|Year of fee payment: 6 |
    2021-01-22| PLSC| Publication of the preliminary search report|Effective date: 20210122 |
    2021-05-22| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    DE102014008345|2014-06-05|
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