Shanghai Daoqin Plastics Co., Ltd.

liquid pressure 传动: it is liquid pressure is as 介质, through force parts (油泵) will machine machine can is liquid pressure pressure can, again through control parts, rear 借助执行元 parts (油缸 or 油马达) will pressure can is machine can, negative achieve or 回转运动, through for control parts 遥, 遥控操纵 and for amount adjustment, 调定执行元 parts force and speed degree. outer for upper system has 扰动时, 执行元 parts amount generally need 偏离原 has value, generate 一定 误差
    liquid pressure control: and liquid pressure 传动一样, system in 也包括动 force parts, control parts and 执行元 parts, is through liquid 传递功 rate. different is liquid pressure control tool has plant/unit, plant/unit function is 执行元 parts amount (位移, speed degree, force and other machine amount)反馈回 and amount (can is 变化, can is 恒定)进行 comparison, use comparison rear control system, make 执行元 parts 输出随输入 amount 变化而变化 or maintain 恒定. it is types formed ring liquid pressure system, liquid pressure system or liquid pressure system.
    liquid pressure system in use is 通断式 or 逻辑式 control parts, its control 目, is maintain by value stability or mono pure direction, 也叫定 value and control parts.
    liquid pressure control system in use is control parts, tool has structure, use electrical plant/unit control, has relatively high control degree and speed degree, control pressure and amount 常连续变化. 输出功 rate can large.
    ratio/proportion control is upper 述二者 between types control, use ratio/proportion control is in 通断式 control parts and control parts upper development 起 一 types new type electrical ―― liquid control parts, upper type parts features, used for use 手调 通断式 control can meet/satisfy requirements, 但也不 need 伺服阀 for liquid pressure system that 样严格 污染 control requirements combined.
    二, liquid pressure system excellent disadvantages
    in currently large type methods (machine 械, electrical, liquid pressure and gas pressure) in, has types force is full 十美, liquid pressure tool has lower its obvious advantages: (1) from structure upper 看, its mono weight 输出功 rate and mono dimensions 输出功 rate in type methods in is force pressure 群芳, has very large force amount ratio, in same rate lower, liquid pressure plant/unit small, weight light, property small, structure 紧凑, 布局灵 active. (2) from as property can upper 看, speed degree, 扭矩, rate can grade adjustment, as property fast, can speed toward and speed, speed scope/range wide, speed scope/range can 达100: l to 2000: 1; as fast speed property good, control, adjustment comparison simple, comparison 方便, force, and electrical control versus combined, and and CPU(计算 machine) 连接, achieve 自动化. (3) from use upper 看, parts lubricated property good, easy achieve 载保护 and holding pressure, safety can 靠; parts easy achieve series 化, standards 化, general purpose 化. （4） has using/adopting liquid pressure technology equipment safety can property good. （5）经济: liquid pressure technology can property and can property very strong/high, can increase flexible production degree, and easy for production 程序进行改变 and adjustment, liquid pressure parts versus for manufacturing cost high, property comparison strong/high. (6) liquid pressure easy and micro machine control and other new technology versus combined, formed “ machine - electrical - liquid - light ”一体化 already formed is world development 潮流, achieve 数字化.
    liquid pressure disadvantages:
    任何事 material is separation is 二, liquid pressure 传动也不例 outer: (1) liquid pressure 传动因 has versus for surface can 避免 存 in 泄漏, meanwhile liquid is for can pressure shrink, add upper tube/pipe and other elastic property deformation, liquid pressure 传动不 can to 严格 传动 ratio, 因而不 can used for processing gears and other machine inner 联传动链 in. (2)油 liquid flow process in in loss 失, local loss and loss 失, efficiency relatively low, 不适宜远距离传动. (3) in high temperature and low temperature conditions lower, using/adopting liquid pressure has 一定 困 difficult. (4) is anti 止漏油以 and is meet/satisfy certain property can upper requirements, liquid pressure parts manufacturing degree requirements high, to use and repair maintenance belt/tape 一定困 difficult. (5)发生 fault/failure easy 检查, especially is liquid pressure technology 不太普 and mono 位, this 一矛盾往往 retardant liquid pressure technology 进一步推广 application. liquid pressure equipment repair need experience, training liquid pressure technology time relatively long.