3.1液压传动系统 Hydraulic drive system
3.1.1组成 Composition
液路系统主要由液压转向系、工作装置液压系、液压助力系三部分组成。主要包括井架伸缩油缸、液压油箱、崩扣缸、液压小绞车、支腿油缸、伸缩套管油缸、主油泵、刹车助力油泵、转向油缸、液压泵滤清器、减压阀、溢流阀及各种液压操纵阀。
The hydro system is mostly composed of the hydraulic steering system, the working device hydraulic system and the hydraulic assistance system. It includes derrick telescopic oil cylinder, hydraulic tank, 崩扣 cylinder, hydraulic windlass, leg oil cylinder, telescopic tube oil cylinder, main oil pump, brake assistance oil pump, steering oil cylinder, hydraulic pump filter, relief valve, overflow valve and various hydraulic control valves.
溢流阀、减压阀及各压力调节部位的压力在出厂前已经调好，在使用中一般不要再调节。滤清器应定期检查和清洗，以保证液路系统工作的可靠性。在液压油中混入水分的限度(重量比小于0．0 5％)。污蚀度小于7．0～1 0．0 m g／1 0 0 m l。一般情况下液压油更换周期为：一年半左右。如果液压油中混入水分的限度及污蚀度未超过限量时，可适当延长液压油使用周期。但不到换油时间，液压油中混入水分限度及污蚀度已超过限量，应提前更换液压油。
Pressures of overflow valve, relief valve and each pressure governing position have been set before the ex-works; generally no re-adjustment should be made in service. The filter should be inspected and rinsed periodically to ensure the reliability of the hydro system. Limit (weight ratio) of the water mixed into the hydraulic oil is less than 0.05%, the dirty degree is less than 7.0~1 .0 mg/100 ml. Generally the replace cycle of the hydraulic oil is about per year and a half. If the limit and the dirty degree of the water mixed into the hydraulic oil are not greater than the set limit to, service cycle of the hydraulic oil can be duly postponed. However, if the limit and the dirty degree of the water mixed into the hydraulic oil exceed the set limit before the oil changing time, the hydraulic oil must be replaced in advance.

华译网北京翻译公司翻译过大量有关液压传动系统的文件资料,Beijing Chinese Translation Service Company has translated many technical documents about Hydraulic drive system
3.1.2工作原理Operating principle
本机液压系统额定工作压力为14MPa，其工作原理详见图4。
Rated operating pressure of the hydraulic system is 14MPa; the operating principle is detailed in Fig.4.
（1）液压转向系 Hydraulic steering system
本机采用全液压转向系统，工作可靠，故障少，结构简单紧凑，安装方便。转向系由油箱，滤油器、油泵、手动换向阀、转向器、阀块、转向油缸、转向桥、管路等组成，系统压力为14MPa。转向器总成见图8。
This machine adopts the full hydrostatic steering system, reliable in operation, few in failure, simple and compact in structure and convenient in installation. The steering system is composed of the tank, oil cleaner, oil pump, manual reverse valve, steering device, valve block, steering oil cylinder, steering axle, and pipeline, etc.; the system pressure is 14MPa. Assembly of the steering device is shown in Fig.8.
转向油缸装在转向桥上，油缸油腔进出油由转向器控制，当方向盘旋转时，转向油缸开始工作，活塞杆将推动转向支架，从而使转向轮绕上、下销轴中心转动，通过转向拉杆使两轮转动同一个角度，即可实现行驶方向的控制。
The steer oil cylinder is installed on the steering axle; in and out oil in the oil cylinder chamber is controlled by the steering device. When the steering wheel rotates, the steering oil cylinder goes into operation and the piston rod pushes the steering bracket, thereby the steering wheel rotates around the upper and lower axis pin to rotate two wheels by the same angle via the steering link to realize the control to the running direction.
（2）工作装置液压系 Hydraulic system of working device
工作装置液压系主要由1个二联手动换向阀、1个六联手动换向阀、1个四联手动换向阀、1个液压小绞车、11个油缸等部件组成。六联手动换向阀可分别控制4个支腿油缸、2个井架底座支腿油缸、2个井架升降油缸和1个井架伸缩油缸；1个二联手动换向阀，用来控制工作装置液压系与转向液压系的转换和六联手动换向阀与四联手动换向阀转换；四联手动换向阀可以分别控制1个液压小绞车、2个崩扣缸和1个液压动力输出。
The hydraulic system of working device is mostly composed of one dual manual reverse valve, one hexa-manual reverse valve, one quad manual reverse valve, one hydraulic windlass and eleven oil cylinders, etc. The hexa manual reverse valve can control 4 leg oil cylinders, 2 derrick base leg oil cylinders, 2 derrick hoist cylinders and   derrick telescopic oil cylinder separately; One dual manual reverse valve is used to control the conversion between the hydraulic system of working device and the steering hydraulic system as well as the conversion between the hexa manual reverse valve and the quad manual reverse valve; The quad manual reverse valve can control the outputs of 1 hydraulic windlass, 2  cylinders and 1 hydraulic power.