,计算机能够自动监测液压系统和柴油机的运行参数,如压力、柴油机转速等,并能根据这些参数自动控制整个挖掘机动力系统运行在状态。其次,能够完成一些半自动操作,如平地、斜坡的修整等,对司机的熟练程度要求降低,但工作质量却能够得到大幅度提高。第三,能够根据监测到的运行参数进行故障诊断,便于挖掘机的维护。这些功能的出现,使挖掘机性能得以大幅度提高。
Firstly, the computer can automatically monitor the operating parameters of hydraulic system and diesel engine, such as pressure, diesel engine speed, etc., and automatically control the whole excavator power system to run in an efficient and energy-saving state according to these parameters. Secondly, it can complete some semi-automatic operations, such as leveling and slope trimming, which reduces the requirements for the proficiency of drivers, but the work quality can be greatly improved. Thirdly, fault diagnosis can be carried out according to the monitored operating parameters, which is convenient for the maintenance of the excavator. The emergence of these functions greatly improves the performance of the excavator.
柴油机电喷控制:在传统的机械调速柴油机上,喷油泵的循环供油量、喷油提前角等都受到转速影响,使柴油机性能难以进一步提高。
Diesel electro-mechanical injection control: in the traditional mechanical speed regulating diesel engine, the circulating oil supply and injection advance angle of the injection pump are affected by the speed, which makes it difficult to further improve the performance of the diesel engine.
在柴油机上应用电喷控制后,可以使泵的循环供油量和喷油提前角不再受转速的影响,从而使挖掘机能够一直工作在状态,而且加快了响应速度。开发柴油机电喷控制器是提高挖掘机性的一个重要环节。
After the electronic injection control is applied to the diesel engine, the circulating oil supply and injection advance angle of the pump can no longer be affected by the speed, so that the excavator can always work in the best state and speed up the response speed. The development of diesel electromechanical injection controller is an important link to improve the energy saving of excavator.
负荷传感控制将继续发展:负荷传感控制从20世纪70年代开始兴起,各工程机械液压件生产厂商纷纷推出了一系列有关产品。
Load sensing control will continue to develop: load sensing control began to rise in the 1970s, and various manufacturers of hydraulic parts of construction machinery have launched a series of relevant products.
这种系统具有良好的性和操纵性,即使不熟练的司机也能很快适应。比例流量分配阀的出现进一步推动了负荷传感技术在挖掘机上的应用,使挖掘机操纵性进一步提高,了西方由于熟练司机的缺乏而带来的问题。因此,负荷传感控制挖掘机在发达的需求将会进一步上升。
This system has good energy saving and maneuverability, and even unskilled drivers can adapt quickly. The emergence of proportional flow distribution valve further promotes the application of load sensing technology in excavators, further improves the operability of excavators, and solves the problems caused by the lack of skilled drivers in western countries. Therefore, the demand for load sensing control excavators in developed countries will further rise.
六通多路阀继续存在:尽管采用四通阀的负荷传感系统能提供精确操作,但并非所有场合都需要精确操作,而且熟练司机也能用非负荷传感系统挖掘机完成精确操作。
Six way multi-way valve continues to exist: Although the load sensing system with four-way valve can provide accurate operation, accurate operation is not required in all occasions, and skilled drivers can complete accurate operation with excavators without load sensing system.
更重要的是,负荷传感系统较高,限制了它在发展家的应用。目前,世界上许多的挖掘机生产厂商,其产品中既有使用四通阀的负荷传感控制挖掘机,也有使用六通阀液压系统如正流量、负流量控制的挖掘机。成熟的制造技术和低廉的将会使六通多路阀继续发挥作用。
More importantly, the high price of load sensing system limits its application in developing countries. At present, many famous excavator manufacturers in the world not only use four-way valve load sensing control excavator, but also use six-way valve hydraulic system, such as positive flow and negative flow control excavator. Mature manufacturing technology and low price will make the six way multi-way valve continue to play a role.
进一步改进阀控液压挖掘机控制:在采用六通多路阀的液压系统中,仍然有许多可以改进的地方,如操纵性、性等,今国外各挖掘机生产厂仍在研究。
Further improve the energy-saving control of valve controlled hydraulic excavator: in the hydraulic system with six-way multi-way valve, there are still many places that can be improved, such as maneuverability, energy saving, etc. so far, foreign excavator manufacturers are still studying.
多功能组合:为提高性能,各种液压挖掘机控制措施的结合将更加广泛。
Multi function combination: in order to improve performance, the combination of various energy-saving control measures of hydraulic excavator will be more extensive.
在以往的系统中,液压泵上已经集成有多种功能,但由于各种条件的限制,一般不超过三种。如液压泵中,就集成有压力切断、正流量控制和功率限制功能,目前市场上比较流行的各种液压泵原理图中,也都集成有多种功能。随着液压技术的发展,有可能在泵上集成更多的功能。
In previous systems, a variety of functions have been integrated on the hydraulic pump, but due to the limitations of various conditions, there are generally no more than three. For example, the hydraulic pump integrates the functions of pressure cut-off, positive flow control and power limit. At present, various functions are also integrated in the schematic diagrams of various popular hydraulic pumps in the market. With the development of hydraulic technology, it is possible to integrate more functions on the pump.
可变参数控制:为使挖掘机更好地适应各种工况下的负载要求,动力系统内部一些控制元件的设定参数将不再是固定值,而是能随着挖掘机具体工作状况而改变。
Variable parameter control: in order to make the excavator better adapt to the load requirements under various working conditions, the set parameters of some control elements in the power system will no longer be fixed values, but can change with the specific working conditions of the excavator.
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