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液压机液压系统组成部分

液压机液压系统组成部分

作者:admin    来源:未知    发布时间:2020-08-18 21:00    浏览量:

一个完整的液压机液压系统由五个部分组成,即动力元件、执行元件、控制元件、辅助元件(附件)和液压油。液压系统可分为两类:液压传动系统和液压控制系统。液压传动系统以传递动力和运动为主要功能。液压控制系统则要使液压系统输出满足特定的性能要求(特别是动态性能),通常所说的液压系统主要指液压传动系统。

动力元件

液压机液压系统动力元件的作用是将原动机的机械能转换成液体的压力能,指液压系统中的油泵,它向整个液压系统提供动力。液压泵的结构形式一般有齿轮泵、叶片泵、柱塞泵和螺杆泵。

执行元件

执行元件(如液压缸和液压马达)的作用是将液体的压力能转换为机械能,驱动负载作直线往复运动或回转运动。

控制元件

液压机液压系统控制元件(即各种液压阀)在液压系统中控制和调节液体的压力、流量和方向。根据控制功能的不同,液压阀可分为压力控制阀、流量控制阀和方向控制阀。压力控制阀包括溢流阀(安全阀)、减压阀、顺序阀、压力继电器等;流量控制阀包括节流阀、调整阀、分流集流阀等;方向控制阀包括单向阀、液控单向阀、梭阀、换向阀等。根据控制方式不同,液压阀可分为开关式控制阀、定值控制阀和比例控制阀。

辅助元件

辅助元件包括油箱、滤油器、冷却器、加热器、蓄能器、油管及管接头、密封圈、快换接头、高压球阀、胶管总成、测压接头、压力表、油位计、油温计等。

液压油

液压机液压油是液压系统中传递能量的工作介质,有各种矿物油、乳化液和合成型液压油等几大类。

 

 

A complete hydraulic system of hydraulic press is composed of five parts, namely, power components, executive components, control elements, auxiliary components (accessories) and hydraulic oil. Hydraulic system can be divided into two categories: hydraulic transmission system and hydraulic control system. The main function of hydraulic transmission system is to transfer power and movement. The hydraulic control system is to make the output of the hydraulic system meet the specific performance requirements (especially the dynamic performance). Generally speaking, the hydraulic system mainly refers to the hydraulic transmission system.

Power element

The function of the power component of the hydraulic system of the hydraulic press is to convert the mechanical energy of the prime mover into the pressure energy of the liquid. It refers to the oil pump in the hydraulic system, which provides power to the whole hydraulic system. The structure of hydraulic pump is generally gear pump, vane pump, plunger pump and screw pump.

Actuator

The function of executive components (such as hydraulic cylinder and hydraulic motor) is to convert the pressure energy of liquid into mechanical energy and drive the load to perform linear reciprocating or rotary motion.

Control element

The hydraulic system control elements (i.e. various hydraulic valves) control and regulate the pressure, flow and direction of the liquid in the hydraulic system. According to the different control functions, the hydraulic valve can be divided into pressure control valve, flow control valve and direction control valve. The pressure control valve includes relief valve (safety valve), pressure reducing valve, sequence valve, pressure relay, etc.; the flow control valve includes throttle valve, adjustment valve, diversion and collecting valve; the directional control valve includes one-way valve, hydraulic control check valve, shuttle valve, directional valve, etc. According to the different control methods, the hydraulic valve can be divided into on-off control valve, fixed value control valve and proportional control valve.

Auxiliary components

Auxiliary components include oil tank, oil filter, cooler, heater, accumulator, oil pipe and pipe joint, sealing ring, quick change connector, high pressure ball valve, rubber hose assembly, pressure tap, pressure gauge, oil level gauge, oil temperature gauge, etc.

Hydraulic oil

The hydraulic oil of hydraulic press is the working medium of transmitting energy in the hydraulic system. There are many kinds of mineral oil, emulsion and synthetic hydraulic oil.

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