液压传动与控制技术
2020-07-21 14:08:28 0 举报AI智能生成
液压传动及其控制_Hydraulic Transmission_and Control
作者其他创作
大纲/内容
自由主题
液压原理hydraulic principle
静力学static
静压力基本方程basic equation of static pressure
帕斯卡原理pascal's principle
动力学dynamics
连续方程continuity equation
能量方程energy equation
动量方程momentum equation
流体特性
雷诺数Reynolds number
层流laminar flow
紊流turbulent flow
压力损失pressure loss
沿程压力损失water head losing
局部压力损失local pressure loss
薄壁流量公式thin-wall flow formula
液压元件hydraulic component
液压泵和液压马达hydraulic pump、hydraulic motor
液压泵
基本
压力、流量、排量pressure、flow、displacement
功率损失power loss
容积损失volume loss
内泄漏internal leakage
机械损失mechanical loss
摩擦friction
齿轮泵gear pump
优点：抗污染力强 anti- pollution cheap
困油pocketed oil phenomena
high pressure
partial vacuum
卸荷槽relief notch
泄漏leakage
axial leakage
float platelet high pressure oil press the plateso they can tightly contact with gear
叶片泵vane pump
脉动小、噪声小small impulse and noise
限压式变量叶片泵limited pressure variable vane pump
柱塞泵plunger pump
高压 体积小 油污敏感pressure volume sensitive
轴向柱塞泵axial plunger pump
径向柱塞泵radial plunger pump
液压马达
齿轮马达 高速gear motor
轴向柱塞液压马达 低速axial plunger motor
摆动马达swing motor
液压缸hydraulic cylinder
活塞缸piston cylinder
柱塞缸plunger cylinder
组成
缸筒cylinder barrel
缸盖Cylinder Head
活塞piston
活塞杆piston rod
缓冲装置cushion device
排气装置exhausting device
液压阀hydraulic valve
阀的共性问题valve‘s problem
液动力flow force
稳态液动力steady flow force
瞬态液动力transient flow force
卡紧力lock force
均压槽equalizer-slot
方向控制阀directional control valve
单向阀one-way valve
液控单向阀hydraulic control one-way valve
换向阀directional control valve
压力控制阀pressure control valve
溢流阀relief valve
功能
维持压力稳定
背压阀，稳定系统
安全阀，保证安全
直动式direct acting
灵敏度高high sensitivity
不适用大流量、高压not suitable for high flowhigh pressure
先导式piloted
适用高压apply to high pressure
调整方便easy to adjust
反应慢slow response
减压阀decompression valve
作用
区别
1、减压阀保持出口压力不变
2、减压阀常态为开
3、减压阀需接油箱
流量控制阀flow control valve
节流阀throttle valve
调速阀speed control valve
辅助装置auxiliary device
蓄能器accumulator
供应压力油在短时间内provide pressure oil in short time
维持系统压力keep pressure of the system
减小冲击reduce impact
过滤器filter
油箱oil tank
储存油液store oil
散热cooling the oil
分离气体separate air
体积和流量相关
液压回路hydraulic circuit
调速回路speed governing circuit
节流调速throttle velocity governing
定压式constant pressure type
溢流损失relief loss
节流损失throttle loss
变压式change pressure type
效率高
溢流阀为安全阀
容积调速volume velocity governing
泵-缸式pump-cylinder
大功率、速度高
压力回路pressure governing circuit
调压回路pressure governing circuit
快速运动回路quick movement circuit
锁紧回路locking circuit
速度切换回路speed switch circuit
液压系统hydraulic system
组合动力机床combination machine tool
汽车起重car jack-up system
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