WO2013123774A1 - 混合动力液压挖掘机及其冷却系统 - Google Patents

混合动力液压挖掘机及其冷却系统 Download PDF

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Publication number
WO2013123774A1
WO2013123774A1 PCT/CN2012/082185 CN2012082185W WO2013123774A1 WO 2013123774 A1 WO2013123774 A1 WO 2013123774A1 CN 2012082185 W CN2012082185 W CN 2012082185W WO 2013123774 A1 WO2013123774 A1 WO 2013123774A1
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WIPO (PCT)
Prior art keywords
cooling
pump body
engine
power source
disposed
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2012/082185
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English (en)
French (fr)
Inventor
东荣
张明珍
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Hunan Zoomlion Special Vehicle Co Ltd
Zoomlion Heavy Industry Science and Technology Co Ltd
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Hunan Zoomlion Special Vehicle Co Ltd
Zoomlion Heavy Industry Science and Technology Co Ltd
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Application filed by Hunan Zoomlion Special Vehicle Co Ltd, Zoomlion Heavy Industry Science and Technology Co Ltd filed Critical Hunan Zoomlion Special Vehicle Co Ltd
Publication of WO2013123774A1 publication Critical patent/WO2013123774A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/2058Electric or electro-mechanical or mechanical control devices of vehicle sub-units
    • E02F9/2095Control of electric, electro-mechanical or mechanical equipment not otherwise provided for, e.g. ventilators, electro-driven fans
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02FDREDGING; SOIL-SHIFTING
    • E02F9/00Component parts of dredgers or soil-shifting machines, not restricted to one of the kinds covered by groups E02F3/00 - E02F7/00
    • E02F9/20Drives; Control devices
    • E02F9/22Hydraulic or pneumatic drives
    • E02F9/226Safety arrangements, e.g. hydraulic driven fans, preventing cavitation, leakage, overheating

Definitions

  • the present invention relates to the field of earthmoving machinery, and more particularly to a hybrid hydraulic excavator and a cooling system therefor.
  • the cooling system of a conventional hydraulic excavator is mainly divided into three parts: 1. cooling of the engine itself; 2. cooling of the intake air of the engine; 3. cooling of the hydraulic oil.
  • Hybrid hydraulic excavator system has more auxiliary power source consisting of power motor, rotary motor and corresponding controller and super capacitor. The power motor and controller and the rotary motor and controller in the auxiliary power source need to be cooled. If an independent cooling system is used, the following problems exist:
  • the present invention is directed to a hybrid excavator and a cooling system thereof, which can utilize the limited space on the hybrid excavator reasonably, and ensure the cooling effect of the power motor and its controller and the rotary motor and its controller.
  • a hybrid hydraulic excavator cooling system comprising: an engine; an engine fan connected to an engine drive; and an integrated heat dissipation system disposed in an air direction of the engine fan,
  • the cooling device is included; the pump body is connected in series with the cooling device through the pipeline, and the pump body drives the medium to circulate in the pipeline; and the cooling device is arranged in series on the pipeline between the pump body and the cooling device.
  • the pipeline includes a first cooling branch and a second cooling branch arranged in parallel
  • the cooled device includes a rotary motor, a power motor, a rotary motor controller, and a power motor controller, and the rotary motor and the power motor are disposed at the first On the cooling branch, the rotary motor controller and the power motor controller are disposed on the second cooling branch. Further, the rotary motor and the power motor are sequentially disposed on the pipeline between the pump body and the cooling device along the flow direction of the medium. Further, a temperature sensor for measuring the temperature of the medium is disposed between the cooling device and the cooling device, and a pump body adjusting device is disposed between the temperature sensor and the pump body.
  • the pump body adjusting device includes a driving motor coupled to the pump body, a driving power source and a relay switch connected in series with the driving motor, a relay switch controller disposed between the relay switch and the temperature sensor, and a temperature control relay according to the temperature sensor The state of the switch.
  • the driving power source is a 24V DC power source.
  • the integrated heat dissipation system further includes an engine water cooler, an engine intercooler and a hydraulic oil cooler, a cooling device, an engine intercooler and a hydraulic oil cooler are arranged in parallel, and the engine water cooler is disposed in the cooling device, the engine intercooler, and The leeward side of the hydraulic oil cooler.
  • a hybrid hydraulic excavator including a cooling system that is a hybrid hydraulic excavator cooling system as described above.
  • a hybrid hydraulic excavator including an engine, an auxiliary power source, an integrated heat dissipation system, and an engine fan for air cooling the integrated heat dissipation system, the integrated heat dissipation system including the engine itself a cooled engine water cooler, an engine intercooler for engine intake cooling, and a hydraulic oil cooler for hydraulic oil cooling, the integrated heat dissipation system further includes a cooling device for auxiliary power source cooling, a cooling device and an auxiliary power The source is connected by tubing to form a closed circuit containing a circulatory cooling medium.
  • a pump body for driving the circulation of the cooling medium is connected to the circuit formed by the cooling device and the auxiliary power source.
  • a temperature sensor is connected to the circuit formed by the cooling device and the auxiliary power source, and a pump body adjusting device is disposed between the temperature sensor and the pump body, the pump body adjusting device is connected in parallel with the auxiliary power source, and the temperature sensor detects the cooling medium.
  • the temperature of the auxiliary power source after cooling, the pump body adjusting device adjusts the rotational speed of the pump body according to the temperature detected by the temperature sensor.
  • the pump body adjusting device includes a driving motor coupled to the pump body, a driving power source and a relay switch connected in series with the driving motor, a relay switch controller disposed between the relay switch and the temperature sensor, and the relay switch controller detecting according to the temperature sensor The temperature control relay switch to the closed or open.
  • the hybrid hydraulic excavator cooling system includes an engine, an engine fan, an integrated heat dissipation system, a pump body, and a cooled device.
  • the engine fan is connected to the engine, and the integrated heat dissipation system is disposed in the air direction of the engine fan, including a cooling device.
  • the pump body is connected in series with the motor and the cooling device, and the medium in the pump body is cooled by the cooling device, and the cooling device is connected in series. It is placed on the cooling path between the pump body and the cooling device.
  • the cooling device is cooled by the engine fan on the basis of reducing the installation space of the cooling device, and there is no need to provide a separate cooling fan for the cooling device, thereby further saving space and reducing space.
  • the cost ensures the cooling effect of the cooling device.
  • a temperature sensor for measuring the temperature of the medium is disposed between the cooling device and the cooling device, and a pump body adjusting device is disposed between the temperature sensor and the pump body.
  • FIG. 1 shows a schematic view of a connection structure of a hybrid excavator cooling system according to an embodiment of the present invention
  • FIG. 2 shows an engine and integration of a hybrid excavator cooling system according to an embodiment of the present invention.
  • FIG. 3 shows a schematic structural view of an integrated cooling system of the hybrid excavator cooling system according to an embodiment of the present invention.
  • a hybrid hydraulic excavator cooling system includes an engine 10, an engine fan 11, an integrated heat dissipation system 20, a pump body 30, and a cooled device 40, in accordance with an embodiment of the present invention.
  • the cooled device 40 is an auxiliary power source of the hybrid hydraulic excavator, and the auxiliary power source is used to set the engine with the engine. 10 jointly drives the working system of the hybrid hydraulic excavator.
  • the engine 10 is in driving connection with the engine fan 11, and the engine 10 supplies power to the engine fan 11.
  • the integrated heat dissipation system 20 is disposed in the air direction of the engine fan 11, and the integrated heat dissipation system 20 is air-cooled by the engine fan 11.
  • the medium in the pump body 30 is cooled and cooled by the integrated heat dissipation system 20, and then flows through the cooled device 40 to cool and cool the cooled device 40.
  • the direction of the arrow in the figure represents the wind direction.
  • the engine fan 11 may be a suction fan or a blower fan. In this embodiment, the engine fan is a suction fan. Referring to FIG. 2 and FIG.
  • the integrated heat dissipation system 20 includes an engine water cooler 21, an engine intercooler 22, a hydraulic oil cooler 23, and a cooling device 24, wherein the engine intercooler 22, the cooling device 24, and the hydraulic oil
  • the coolers 23 are arranged in parallel from top to bottom in sequence, and are located on the windward side of the engine fan 11.
  • the engine water cooler 21 is disposed on the leeward side of the engine intercooler 22, the cooling device 24, and the hydraulic oil cooler 23, and is in a stacked relationship with the engine intercooler 22, the cooling device 24, and the hydraulic oil cooler 23.
  • the integrated heat dissipation system 20 fixedly connects the engine water cooler 21, the engine intercooler 22, the hydraulic oil cooler 23, and the cooling device 24 through a connecting plate and a connecting bolt, etc., so that the engine water cooler 21, the engine intercooler 22, and the hydraulic pressure
  • the relative position between the oil cooler 23 and the cooling device 24 is fixed. This arrangement reduces the area of the integrated heat dissipation system 20, reduces the space occupied by the integrated heat dissipation system 20, and at the same time ensures the cooling effect of the cooling device 24.
  • the pump body 30 and the cooling device 24 are connected in series through a pipeline, and the pump body 30 drives the cooling medium to circulate in the pipeline, so that the cooling medium cooled by the cooling device 24 circulates the cooling device 40 to cool the cooled device.
  • the heat generated in the work process protects the cooled device 40 from damage due to high temperature or affects performance.
  • the installation space of the excavator is generally limited, and it is difficult for the cooling device cooled by the cooling device 40 to have a sufficient installation space for installation, which causes great inconvenience to the cooling of the cooling device 40.
  • Integrating the cooling device 24 on the integrated heat dissipation system 20 avoids the separate space required for the cooling device 24 to be separately disposed, simplifies the cooling system, and can cool and cool the cooling device 24 by the engine fan 11 without the need for a cooling device.
  • the addition of a separate cooling fan does not require a separate power supply to the cooling fan, thereby further compressing the installation space, facilitating the installation and use of the cooling device 24, reducing the cost, and ensuring the cooling effect on the cooled device 40.
  • the engine fan 11 cools the integrated heat dissipation system 20, primarily by cooling the engine coolant, the engine intake, the excavator hydraulic oil, and the cooling medium of the motor and cooler by the engine fan 11.
  • the pipeline includes a first cooling branch and a second cooling branch, and the first cooling branch and the second cooling branch are disposed between the outlet end of the pump body 30 and the cooling device 24.
  • the cooled device 40 includes a swing motor 41, a power motor 42, a swing motor controller 43, and a power motor controller 44.
  • the swing motor 41 and the power motor 42 are disposed on the first cooling branch of the pipeline.
  • the rotary motor controller 43 and the power motor controller 44 are disposed on the second cooling branch of the pipeline, and the two cooling branches are disposed in parallel on the cooling pipeline formed by the pump body 30, and the rotary motor 41, the power motor 42, and the swing The motor controller 43 and the power motor controller 44 perform cooling.
  • the first cooling branch and the second cooling branch are connected in parallel, and the two branches can be separately cooled to ensure the overall cooling effect on the cooled device 40.
  • the swing motor 41 and the power motor 42 are sequentially disposed in the flow direction of the medium between the pump body 30 and the cooling device 24. This arrangement is based on the condition that the power motor 42 is mounted next to the engine 10.
  • the temperature of the power motor 42 is much higher than that of the rotary motor 41. Therefore, after the rotary motor 41 is cooled first, the temperature of the cooling medium is still low, and the power motor 42 can continue to be effectively cooled, which is good. Cooling effect.
  • a temperature sensor 31 is provided between the cooled device 40 and the cooling device 24 for detecting the temperature of the cooling medium after the cooling device 40 is cooled.
  • a pump body adjusting device 50 is disposed between the temperature sensor 31 and the pump body 30, and the rotation speed of the pump body 30 is adjusted according to the temperature detected by the temperature sensor 31, thereby adjusting the displacement of the pump body 30, and cooling the pump body 30.
  • the performance is adjusted to match the temperature of the cooling medium to achieve a good cooling effect on the cooled device 40, while reducing energy consumption and improving energy efficiency.
  • the pump body adjusting device 50 includes a drive motor 51 that is drivingly coupled to the pump body 30 and a drive power source 52 that is connected in series with the drive motor.
  • the power source of the pump body 30 may be alternating current or direct current.
  • the pump body 30 may be driven by the engine 10 to achieve pumping, or the pump body 30 may be pumped by a separate drive motor.
  • the pump body 30 is drivingly coupled to the drive motor 51.
  • the drive motor 51 is coupled to the drive power source 52, and the drive motor 51 is rotated by the drive power source 52 to drive the pump body 30 to rotate.
  • the driving power source 52 is a 24V battery
  • the driving motor is a 24V DC motor.
  • the battery charging is realized by a 70A generator that is provided by the engine 10.
  • the 24V voltage is a safe voltage, which ensures the safe operation of the operator and reduces the danger of the drive power to the operator, thus improving the safety performance during the operation of the excavator.
  • the pump body adjusting device 50 further includes a relay switch 53 provided on a connection circuit between the drive motor 51 and the drive power source 52, and a relay switch controller 54 disposed between the relay switch 53 and the temperature sensor 31.
  • the relay switch controller 54 is used to control the closing and opening of the relay switch 53, and includes a control circuit.
  • the control circuit has a comparison module built therein, and the comparison module is provided with a reference temperature.
  • the comparison module within relay switch controller 54 compares the temperature to the reference temperature.
  • the relay switch controller 54 controls the relay switch 53 to be closed, the circuit of the drive motor is connected, the pump body 30 rotates, and the cooling medium flows, and after cooling and cooling at the cooling device 24, the cooling device 40 is continued. Cool down.
  • the relay switch controller 54 controls the relay switch 53 to be turned off, the circuit of the drive motor is turned off, and the pump body 30 stops rotating, and it is not necessary to drive the cooling medium through the pump body 30 to cool the cooled device 40.
  • the cooling medium may be water or hydraulic oil or the like.
  • the pump body 30 is adjusted by the temperature sensor 31 to output no energy to the pump body 30 when the temperature of the cooling medium is low, and to drive the pump body 30 to rotate when the temperature of the cooling medium is high, to cool the cooling medium, and to have better real-time performance. , reducing energy waste and improving control accuracy.
  • the hybrid hydraulic excavator includes a cooling system that is a hybrid hydraulic excavator cooling system as described above. According to another embodiment of the invention, this embodiment is based on the above embodiment.
  • the hybrid hydraulic excavator of the present embodiment includes an engine 10, an auxiliary power source, an integrated heat dissipation system 20, and an engine fan 11 for air-cooling the integrated heat dissipation system 20.
  • the integrated heat dissipation system 20 includes an engine water cooler 21 for engine cooling, an engine intercooler 22 for engine intake cooling, and a hydraulic oil cooler 23 for hydraulic oil cooling.
  • the integrated heat dissipation system 20 also includes a cooling device 24 for auxiliary power source cooling.
  • the cooling device 24 is coupled to the auxiliary power source via a pipeline to form a closed circuit including a circulatory cooling medium.
  • a pump body 30 for driving a circulating flow of the cooling medium is also connected to the circuit formed by the cooling device 24 and the auxiliary power source.
  • a temperature sensor 31 is also connected to the circuit formed by the cooling device 24 and the auxiliary power source, and a pump body adjusting device 50 is disposed between the temperature sensor 31 and the pump body 30.
  • the pump body adjusting device 50 is connected in parallel with the auxiliary power source, and the temperature sensor 31 detects the temperature after the cooling medium cools the auxiliary power source, and the pump body adjusting device 50 adjusts the rotational speed of the pump body 30 based on the temperature detected by the temperature sensor 31.
  • the pump body adjusting device 50 includes a driving motor 51 that is drivingly coupled to the pump body 30, a driving power source 52 and a relay switch 53 connected in series with the driving motor 51, and a relay switch controller 54 is disposed between the relay switch 53 and the temperature sensor 31, and the relay switch The controller 54 controls the closing or opening of the relay switch 53 based on the temperature detected by the temperature sensor 31.
  • the engine fan is connected to the engine, and the integrated heat dissipation system is disposed in the air direction of the engine fan, including a cooling device.
  • the pump body is connected in series with the motor and the cooling device, and the medium in the pump body is cooled by the cooling device, and the cooling device is connected in series. It is placed on the cooling path between the pump body and the cooling device.
  • a temperature sensor for measuring the temperature of the medium is disposed between the cooling device and the cooling device, and a pump body adjusting device is disposed between the temperature sensor and the pump body.
  • the pump body adjusting device can adjust the pump body according to the temperature measured by the temperature sensor, thereby determining a suitable cooling power for the pump body, fully utilizing the cooling and cooling effect of the cooling device, and reducing the energy consumption.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Operation Control Of Excavators (AREA)
  • Component Parts Of Construction Machinery (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)

Abstract

一种混合动力液压挖掘机冷却系统,包括:发动机(10);发动机风扇(11),与发动机(10)驱动连接;集成散热系统(20),设置在发动机风扇(11)的出风方向上,包括冷却装置(24);泵体(30),与冷却装置(24)通过管路串联,泵体(30)驱动冷却介质在管路内循环流动;被冷却装置(40),串联设置在泵体(30)和冷却装置(24)之间的管路上。还包括了具有该冷却系统的挖掘机。

Description

混合动力液压挖掘机及其冷却系统 技术领域 本发明涉及土方工程机械领域, 具体而言, 涉及一种混合动力液压挖掘机及其冷 却系统。 背景技术 传统液压挖掘机的冷却系统主要分成三部分: 一、 发动机本身的冷却; 二、 发动 机进气的冷却; 三、 液压油的冷却。 混合动力液压挖掘机系统比传动液压挖掘机系统 多了由动力电机、 回转电机和对应的控制器以及超级电容等组成的辅动力源。 辅动力 源中的动力电机及控制器和回转电机及控制器都需要冷却,如果采用独立的散热系统, 存在以下几方面问题:
( 1 ) 散热器风扇电机和水泵电机的电源问题;
(2) 挖掘机上安装空间有限。 如果对辅动力源中电机及控制器采用独立的冷却系统, 由于挖掘机上只有 24VDC 蓄电池, 散热器风扇电机和水泵电机如果采用蓄电池供电, 则增加了蓄电池和发动机 上发电机的负荷;如果采用 220VAC供电,则又需增加从超级电容的直流电到 220VAC 的逆变器, 使系统复杂化。 由于混合动力挖掘机比传统液压挖掘机增加了动力电机及 控制器、 回转电机及控制器和超级电容等部件, 使得挖掘机上安装空间有限, 所以如 果再增加独立的电机散热器、 水泵电机和逆变器等部件, 将给安装、 调试和维护带来 麻烦。 发明内容 本发明旨在提供一种混合动力挖掘机及其冷却系统, 能够合理利用混合动力挖掘 机上有限的空间, 保证动力电机及其控制器和回转电机及其控制器的冷却效果。 为了实现上述目的, 根据本发明的一个方面, 提供了一种混合动力液压挖掘机冷 却系统, 包括: 发动机; 发动机风扇, 与发动机驱动连接; 集成散热系统, 设置在发 动机风扇的出风方向上, 包括冷却装置; 泵体, 与冷却装置通过管路串联, 泵体 驱动 介质在管路内循环流动; 被冷却装置, 串联设置在泵体和冷却装置之间的管路上。 进一步地, 管路包括并联设置的第一冷却支路和第二冷却支路, 被冷却装置包括 回转电机、 动力电机、 回转电机控制器和动力电机控制器, 回转电机和动力电机设置 在第一冷却支路上, 回转电机控制器和动力电机控制器设置在第二冷却支路上。 进一步地, 回转电机和动力电机沿介质的流动方向依次设置在泵体与冷却装置之 间的管路上。 进一步地, 被冷却装置与冷却装置之间设置有测量介质温度的温度传感器, 温度 传感器与泵体之间设置有泵体调节装置。 进一步地, 泵体调节装置包括与泵体驱动连接的驱动马达, 与驱动马达串联的驱 动电源和继电器开关, 继电器开关与温度传感器之间设置有继电器开关控制器, 根据 温度传感器传递的温度控制继电器开关的状态。 进一步地, 驱动电源为 24V直流电源。 进一步地, 集成散热系统还包括发动机水冷器、 发动机中冷器和液压油冷却器, 冷却装置、 发动机中冷器和液压油冷却器并联设置, 发动机水冷器设置在冷却装置、 发动机中冷器和液压油冷却器的背风侧。 冷却装置根据本发明的另一方面, 提供了一种混合动力液压挖掘机, 包括冷却系 统, 该冷却系统为上述的混合动力液压挖掘机冷却系统。 根据本发明的再一方面, 提供了一种混合动力液压挖掘机, 包括发动机、 辅动力 源、 集成散热系统及用于对集成散热系统进行风冷的发动机风扇, 集成散热系统包括 用于发动机本身冷却的发动机水冷器、 用于发动机进气冷却的发动机中冷器及用于液 压油冷却的液压油冷却器, 该集成散热系统还包括用于辅动力源冷却的冷却装置, 冷 却装置与辅动力源通过管路连接形成一封闭的回路, 该回路内包括可循环流动的冷却 介质。 进一步地, 冷却装置和辅动力源所形成的回路中还连接有用于驱动冷却介质循环 流动的泵体。 进一步地, 冷却装置和辅动力源所形成的回路中还连接有温度传感器, 温度传感 器与泵体之间设置有泵体调节装置, 该泵体调节装置与辅动力源并联, 温度传感器检 测冷却介质对辅动力源进行冷却之后的温度, 泵体调节装置根据温度传感器检测到的 温度对泵体的转速进行调节。 进一步地, 泵体调节装置包括与泵体驱动连接的驱动马达, 与驱动马达串联的驱 动电源和继电器开关, 继电器开关与温度传感器之间设置有继电器开关控制器, 继电 器开关控制器根据温度传感器检测到的温度控制继电器开关的闭合或者断开。 应用本发明的技术方案, 混合动力液压挖掘机冷却系统包括发动机、发动机风扇、 集成散热系统、 泵体和被冷却装置。 发动机风扇与发动机之间驱动连接, 集成散热系 统设置在发动机风扇的出风方向上, 包括冷却装置, 泵体与电机及冷却装置串联, 通 过冷却装置对泵体内的介质进行冷却, 被冷却装置串联设置在泵体和冷却装置之间的 冷却路径上。 通过将冷却装置集成设置在集成散热器上, 在减小冷却装置的安装空间 的基础上, 通过发动机风扇对冷却装置进行冷却, 无需对冷却装置设置单独的冷却风 扇, 进一步节约了空间, 降低了成本, 保证了冷却装置的冷却效果。 被冷却装置与冷却装置之间设置有测量介质温度的温度传感器, 温度传感器与泵 体之间设置有泵体调节装置。 泵体调节装置可以根据温度传感器测得的温度来对泵体 进行调节, 从而为泵体确定合适的降温功率, 充分发挥冷却装置的降温散热作用, 同 时降低能量的耗费。 附图说明 构成本发明的一部分的附图用来提供对本发明的进一步理解, 本发明的示意性实 施例及其说明用于解释本发明, 并不构成对本发明的不当限定。 在附图中: 图 1示出了根据本发明的实施例的混合动力挖掘机冷却系统的连接结构示意图; 图 2示出了根据本发明的实施例的混合动力挖掘机冷却系统的发动机和集成冷却 系统的空间位置关系图; 以及 图 3示出了根据本发明的实施例的混合动力挖掘机冷却系统的集成冷却系统的结 构示意图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在不冲突的 情况下, 本申请中的实施例及实施例中的特征可以相互组合。 如图 1所示,根据本发明的实施例,混合动力液压挖掘机冷却系统包括发动机 10、 发动机风扇 11、 集成散热系统 20、 泵体 30和被冷却装置 40。 本实施例中, 该被冷却 装置 40 为混合动力液压挖掘机的辅动力源, 该辅动力源用于在设定情形下与发动机 10共同驱动该混合动力液压挖掘机的工作系统。 发动机 10与发动机风扇 11之间为驱 动连接, 发动机 10为发动机风扇 11提供动力能源。集成散热系统 20设置在发动机风 扇 11的出风方向上, 通过发动机风扇 11对集成散热系统 20进行风冷。 泵体 30内的 介质通过集成散热系统 20进行散热冷却后, 流经被冷却装置 40, 对被冷却装置 40进 行冷却降温。 图中箭头方向代表风向。 发动机风扇 11可以为吸风风扇, 也可以为吹风风扇, 本实施例中, 发动机风扇为 吸风风扇。 请结合参见图 2和图 3所示, 集成散热系统 20包括发动机水冷器 21、 发动机中 冷器 22、 液压油冷却器 23和冷却装置 24, 其中发动机中冷器 22、 冷却装置 24和液 压油冷却器 23之间由上到下依次并联设置, 并位于发动机风扇 11的迎风侧。 发动机 水冷器 21设置在发动机中冷器 22、 冷却装置 24和液压油冷却器 23的背风侧, 与发 动机中冷器 22、 冷却装置 24和液压油冷却器 23形成层叠关系。 集成散热系统 20通 过连接板和连接螺栓等将发动机水冷器 21、 发动机中冷器 22、 液压油冷却器 23和冷 却装置 24固定连接在一起, 使发动机水冷器 21、 发动机中冷器 22、 液压油冷却器 23 和冷却装置 24之间的相对位置固定。 这种设置方式减小了集成散热系统 20的面积, 降低了集成散热系统 20的空间占用, 同时又能够保证冷却装置 24的冷却效果。 泵体 30与冷却装置 24之间通过管路串联,泵体 30驱动冷却介质在管路内循环流 动, 使经过冷却装置 24冷却后的冷却介质循环对被冷却装置 40进行冷却, 降低被冷 却装置 40工作工程中所产生的热量, 保护被冷却装置 40不会由于高温造成损坏或者 影响性能。 挖掘机上装的安装空间一般较为有限,对被冷却装置 40进行冷却的冷却装置难以 有足够的安装空间进行安装, 因此对被冷却装置 40的冷却带来很大的不便。将冷却装 置 24集成在集成散热系统 20上,避免了对冷却装置 24单独进行设置所需要的独立空 间, 简化了冷却系统, 而且能够通过发动机风扇 11对冷却装置 24进行冷却降温, 无 需对冷却装置 24添置单独的冷却风扇, 也无需对该冷却风扇提供单独的电源, 因此, 进一步压缩了安装空间, 便于冷却装置 24的安装和使用, 降低了成本, 保证了对被冷 却装置 40的冷却效果。 发动机风扇 11对集成散热系统 20进行冷却,主要是通过发动机风扇 11对发动机 冷却液、 发动机进气、 挖掘机液压油和电机及冷却器的冷却介质进行冷却来实现的。 当发动机冷却液、 发动机进气、 挖掘机液压油和电机及冷却器的冷却介质完成对相关 部件的冷却之后, 分别在发动机水冷器 21、 发动机中冷器 22、 液压油冷却器 23和冷 却装置 24处对冷却介质进行集中的冷却降温处理,然后冷却降温处理之后的冷却介质 可以继续对相关部件进行降温, 如此循环, 实现对挖掘机相关部分的持续降温操作。 管路包括第一冷却支路和第二冷却支路, 第一冷却支路和第二冷却支路设置在泵 体 30的出口端与冷却装置 24之间。 被冷却装置 40包括回转电机 41、 动力电机 42、 回转电机控制器 43和动力电机控制器 44。 回转电机 41和动力电机 42设置在管路的 第一冷却支路上。 回转电机控制器 43和动力电机控制器 44设置在管路的第二冷却支 路上, 两个冷却支路并联设置在泵体 30所形成的冷却管路上, 对回转电机 41、 动力 电机 42、 回转电机控制器 43和动力电机控制器 44进行冷却。 对第一冷却支路和第二 冷却支路采用并联连接, 可以分别对两个支路进行冷却, 能够保证对被冷却装置 40 的整体冷却效果。 回转电机 41和动力电机 42沿介质的流动方向依次设置在泵体 30与冷却装置 24 之间的管路上。 这种设置方式是基于这样一种状况, 即动力电机 42紧挨发动机 10安 装。 这种情况下, 动力电机 42的温度比回转电机 41高的多, 因此, 先对回转电机 41 进行冷却之后, 冷却介质的温度仍然较低, 可以对动力电机 42继续进行有效冷却, 起 到良好的冷却效果。 在被冷却装置 40和冷却装置 24之间设置有温度传感器 31, 用于检测对被冷却装 置 40进行冷却之后的冷却介质的温度。在温度传感器 31与泵体 30之间设置有泵体调 节装置 50, 根据温度传感器 31检测到的温度对泵体 30的转速进行调节, 从而调整泵 体 30的排量, 对泵体 30的冷却性能进行调整, 使之与冷却介质的温度相配合, 实现 对被冷却装置 40的良好冷却效果, 同时降低能源消耗, 提高能源利用率。 泵体调节装置 50包括与泵体 30驱动连接的驱动马达 51和与驱动马达串联的驱动 电源 52。 泵体 30的动力来源可以为交流电, 也可以为直流电, 可以通过发动机 10来 驱动泵体 30实现泵送, 也可以通过单独的驱动电机来实现泵体 30 的泵送。 泵体 30 驱动连接至驱动马达 51, 驱动马达 51与驱动电源 52连接, 并通过驱动电源 52使驱 动马达 51转动, 从而带动泵体 30转动。 本实施例当中, 驱动电源 52为 24V蓄电池, 驱动马达为 24V直流电机。 其中蓄电池充电是用发动机 10自带的 70A的发电机来实 现的。 24V电压为安全电压, 能够保证操作人员的安全操作, 降低驱动电源对操作人 员的危险性, 从而提高挖掘机操作过程中的安全性能。 泵体调节装置 50还包括设置在驱动马达 51与驱动电源 52之间的连接电路上的继 电器开关 53、以及设置在继电器开关 53与温度传感器 31之间的继电器开关控制器 54。 继电器开关控制器 54用于控制继电器开关 53的闭合和断开, 包括有控制电路, 控制 电路内置有比较模块, 比较模块上设置有基准温度。 当温度传感器 31将测得的冷却介质的温度传递给继电器开关控制器 54后, 继电 器开关控制器 54内的比较模块将该温度与基准温度进行比较。当该温度大于基准温度 时, 继电器开关控制器 54控制继电器开关 53 闭合, 驱动马达的电路连通, 泵体 30 转动, 带动冷却介质流动, 在冷却装置 24处降温散热之后, 继续对被冷却装置 40进 行冷却。 当该温度小于等于基准温度时, 继电器开关控制器 54控制继电器开关 53断 开, 驱动马达的电路断开, 泵体 30停止转动, 无需通过泵体 30驱动冷却介质对被冷 却装置 40进行降温。 冷却介质可以为水或者液压油等。 通过温度传感器 31对泵体 30进行调节, 能够在冷却介质温度较低时不对泵体 30 输出能源, 在冷却介质温度较高时, 驱动泵体 30转动, 对冷却介质进行降温, 实时性 更好, 降低了能源浪费, 提高了控制精度。 根据本发明的实施例, 混合动力液压挖掘机包括冷却系统, 该冷却系统为上述的 混合动力液压挖掘机冷却系统。 根据本发明的另一实施例, 该实施例基于上述实施例。 本实施例的混合动力液压 挖掘机包括发动机 10、 辅动力源、 集成散热系统 20及用于对集成散热系统 20进行风 冷的发动机风扇 11。 集成散热系统 20包括用于发动机本身冷却的发动机水冷器 21、 用于发动机进气冷却的发动机中冷器 22及用于液压油冷却的液压油冷却器 23。 该集 成散热系统 20还包括用于辅动力源冷却的冷却装置 24, 冷却装置 24与辅动力源通过 管路连接形成一封闭的回路, 该回路内包括可循环流动的冷却介质。冷却装置 24和辅 动力源所形成的回路中还连接有用于驱动冷却介质循环流动的泵体 30。 冷却装置 24和辅动力源所形成的回路中还连接有温度传感器 31, 温度传感器 31 与泵体 30之间设置有泵体调节装置 50。 该泵体调节装置 50与辅动力源并联, 温度传 感器 31检测冷却介质对辅动力源进行冷却之后的温度, 泵体调节装置 50根据温度传 感器 31检测到的温度对泵体 30的转速进行调节。 泵体调节装置 50包括与泵体 30驱动连接的驱动马达 51, 与驱动马达 51串联的 驱动电源 52和继电器开关 53, 继电器开关 53与温度传感器 31之间设置有继电器开 关控制器 54, 继电器开关控制器 54根据温度传感器 31检测到的温度控制继电器开关 53的闭合或者断开。 从以上的描述中, 可以看出, 本发明上述的实施例实现了如下技术效果: 混合动 力液压挖掘机冷却系统包括发动机、发动机风扇、集成散热系统、 泵体和被冷却装置。 发动机风扇与发动机之间驱动连接, 集成散热系统设置在发动机风扇的出风方向上, 包括冷却装置, 泵体与电机及冷却装置串联,通过冷却装置对泵体内的介质进行冷却, 被冷却装置串联设置在泵体和冷却装置之间的冷却路径上。 通过将冷却装置集成设置 在集成散热器上, 在减小冷却装置的安装空间的基础上, 通过发动机风扇对冷却装置 进行冷却, 无需对冷却装置设置单独的冷却风扇, 进一步节约了空间, 降低了成本, 保证了冷却装置的冷却效果。 被冷却装置与冷却装置之间设置有测量介质温度的温度 传感器, 温度传感器与泵体之间设置有泵体调节装置。 泵体调节装置可以根据温度传 感器测得的温度来对泵体进行调节, 从而为泵体确定合适的降温功率, 充分发挥冷却 装置的降温散热作用, 同时降低能量的耗费。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本领域的技 术人员来说, 本发明可以有各种更改和变化。 凡在本发明的精神和原则之内, 所作的 任何修改、 等同替换、 改进等, 均应包含在本发明的保护范围之内。

Claims

权 利 要 求 书
1. 一种混合动力液压挖掘机冷却系统, 其特征在于, 包括:
发动机 (10);
发动机风扇 (11 ), 与所述发动机 (10) 驱动连接;
集成散热系统(20), 设置在所述发动机风扇 (11 ) 的出风方向上, 包括冷 却装置 (24);
泵体(30), 与所述冷却装置 (24)通过管路串联, 所述泵体(30)驱动冷 却介质在管路内循环流动;
被冷却装置(40), 串联设置在所述泵体(30)和所述冷却装置(24)之间 的所述管路上。
2. 根据权利要求 1所述的混合动力液压挖掘机冷却系统, 其特征在于, 所述管路 包括并联设置的第一冷却支路和第二冷却支路, 所述被冷却装置 (40) 包括回 转电机(41 )、动力电机(42)、 回转电机控制器(43 )和动力电机控制器(44), 所述回转电机 (41 ) 和所述动力电机 (42) 设置在所述第一冷却支路上, 所述 回转电机控制器 (43 ) 和所述动力电机控制器 (44) 设置在所述第二冷却支路 上。
3. 根据权利要求 2所述的混合动力液压挖掘机冷却系统, 其特征在于, 所述回转 电机 (41 ) 和所述动力电机 (42) 沿所述冷却介质的流动方向依次设置在所述 泵体 (30) 与所述冷却装置 (24) 之间的所述管路上。
4. 根据权利要求 1所述的混合动力液压挖掘机冷却系统, 其特征在于, 所述被冷 却装置 (40) 与所述冷却装置 (24) 之间设置有测量所述冷却介质温度的温度 传感器(31 ), 所述温度传感器(31 )与所述泵体(30)之间设置有泵体调节装 置 (50)。
5. 根据权利要求 4所述的混合动力液压挖掘机冷却系统, 其特征在于, 所述泵体 调节装置(50)包括与所述泵体(30)驱动连接的驱动马达(51 ), 与所述驱动 马达 (51 ) 串联的驱动电源 (52) 和继电器开关 (53 ), 所述继电器开关 (53 ) 与所述温度传感器(31 )之间设置有继电器开关控制器(54), 根据所述温度传 感器 (31 ) 传递的温度控制所述继电器开关 (53 ) 的状态。
6. 根据权利要求 5所述的混合动力液压挖掘机冷却系统, 其特征在于, 所述驱动 电源 (52) 为 24V直流电源。
7. 根据权利要求 1所述的混合动力液压挖掘机冷却系统, 其特征在于, 所述集成 散热系统(20)还包括发动机水冷器(21 )、 发动机中冷器(22)和液压油冷却 器 (23 ), 所述冷却装置 (24)、 所述发动机中冷器 (22) 和所述液压油冷却器
(23 )并联设置, 所述发动机水冷器(21 )设置在所述冷却装置(24)、 所述发 动机中冷器 (22) 和所述液压油冷却器 (23 ) 的背风侧。
8. 一种混合动力液压挖掘机, 包括冷却系统, 其特征在于, 所述冷却系统为权利 要求 1至 7中任一项所述的混合动力液压挖掘机冷却系统。
9. 一种混合动力液压挖掘机, 包括发动机 (10)、 辅动力源、 集成散热系统 (20) 及用于对所述集成散热系统(20)进行风冷的发动机风扇 (11 ), 所述集成散热 系统(20)包括用于发动机本身冷却的发动机水冷器(21 )、用于发动机进气冷 却的发动机中冷器(22)及用于液压油冷却的液压油冷却器(23 ),其特征在于, 该集成散热系统(20)还包括用于所述辅动力源冷却的冷却装置(24), 所述冷 却装置 (24) 与辅动力源通过管路连接形成一封闭的回路, 该回路内包括可循 环流动的冷却介质。
10. 根据权利要求 9所述的混合动力液压挖掘机, 其特征在于, 所述冷却装置(24) 和辅动力源所形成的回路中还连接有用于驱动所述冷却介质循环流动的泵体
(30)。
11. 根据权利要求 10所述的混合动力液压挖掘机,其特征在于,所述冷却装置(24) 和辅动力源所形成的回路中还连接有温度传感器 (31 ), 所述温度传感器 (31 ) 与所述泵体(30)之间设置有泵体调节装置 (50), 该泵体调节装置(50)与所 述辅动力源并联, 所述温度传感器 (31 ) 检测所述冷却介质对所述辅动力源进 行冷却之后的温度, 所述泵体调节装置 (50) 根据所述温度传感器 (31 ) 检测 到的温度对所述泵体 (30) 的转速进行调节。
12. 根据权利要求 11所述的混合动力液压挖掘机,其特征在于,所述泵体调节装置
(50)包括与所述泵体(30)驱动连接的驱动马达(51 ), 与所述驱动马达(51 ) 串联的驱动电源(52)和继电器开关(53 ), 所述继电器开关(53 )与所述温度 传感器(31 )之间设置有继电器开关控制器(54),所述继电器开关控制器(54) 根据所述温度传感器 (31 ) 检测到的温度控制所述继电器开关 (53 ) 的闭合或 者断开。
PCT/CN2012/082185 2012-02-23 2012-09-27 混合动力液压挖掘机及其冷却系统 Ceased WO2013123774A1 (zh)

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