最新千斤顶工作原理(PPT)精品课件.ppt

千斤顶工作原理千斤顶工作原理(PPT)(PPT) Jack was divided into mechanical jacks and hydraulic jack, principle is different.Hydraulic jack is based on the principle of PASCALs principle, namely: the liquid pressure is the same everywhere, so, in a balanced system, the smaller piston top pressure is small, and the big pressure on the piston is bigger, it can keep the liquid stationary.Through liquid, so can be different on the different pressure, so that you can achieve the goal of a transformation.We are common to the hydraulic jack is to use the principle to achieve the force transfer. 螺旋千斤顶螺旋千斤顶:普通螺旋千斤顶靠螺纹自锁作用支持重物，构造简单，但传动效率低，返程慢。自降螺旋千斤顶的螺纹无自锁作用，但装有制动器。放松制动器，重物即可自行快速下降，缩短返程时间，但这种千斤顶构造较复杂。螺旋千斤顶能长期支持重物，最大起重量已达100吨，应用较广。 As lift the handle to make the piston moving up, small piston bottom oil cavity volume increases, the formation of partial vacuum, then check valve 4 is opened, through the suction tubing 5 12 of the fuel tank oil absorption;Firm pressure under the handle, the small piston moves down, small piston inferior vena pressure, closed check valve 4, 7 open check valve, oil pipelines, 6 of inferior vena type lifting oil cylinder 9 inferior vena, forcing the piston 8 moving up, hold up the weight. Again handle oil absorption, one-way valve automatically shut down, the oil cannot flow back, so that the weight will not fall on its own. Continuously reciprocating pull (handle, can constantly put oil hydraulic lifting inferior vena, make the weight rises gradually.If open the cut-off valve 11, lifting of the inferior vena oil 10 and 11 flow cut-off valve back to tank through a pipeline, the weight moves down.This is the working principle of hydraulic jack.14 结束语结束语