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外文資料翻譯譯文
（作者未知） 2010/4/14
（接上頁）system with its CV 2000 LS series pressure-compensated valve. As a result, drill rigs have produced optimal results over the last two years.
The electrohydraulic system consists of a variable-displacement pump with load sensing to improve energy efficiency of the system, the CV 2000 LS pressure-compensated valve, and the EasyProg CANbus system. Designers also made an effort to reduce the amount of hydraulic hose in the machine. Not surprisingly, then, the new design contains about 13 less hose.
Component details
The CV 2000 LS valve can accommodate a flow of 125 lpm to each cylinder port and is designed to work with both fixed- and
variable-displacement pumps. Work port flow is controlled by 12- or 24-V proportional solenoids, with manual hand lever override functions available. Pressure limiters can be fitted on each individual work port together with shock and/or anticavitation valves.
the CV 2000 LS pressure compensator
The EasyProg control is a PC-based system that can be programmed in modules; hardware can also be built in modules to suit requirements of the application. Its CANbus configuration allows for digital and analog inputs and outputs. It features an easy-to-use menu for entering all settings and standard functions. Automatic functions for drill rigs, for example, enhance the speed of parameter settings as well as ensure specific safety parameters.
The CV 2000 LS valve controls key rock drill operating functions, such as percussion pressure and frequency, rotation torque, and feed force. It also controls track drives, positioning, and a hydraulic fan drive.
The rock drill in action
To achieve the best combination of productivity and economy, the operator sets the percussion pressure and frequency, and the control sets rotational speed according to set frequency. The final setting is feed force which is set against the percussion pressure to position the drill bit close to the rock. These settings （未完，下一頁）
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