VICKERS威格士柱塞泵美国* 威格士变量柱塞泵 威格士柱塞泵靠气压供油的液压油箱,在每次启动机器后,必须等液压渍箱达到使用气压后,才能操作机械。直轴斜盘式柱塞泵分为压力供油型的自吸油型两种。压力供油型液压泵大都采用有气压的油箱,也有液压泵本身带有补油分泵向液压泵进油口提供压力油的。自吸油型液压泵的自吸油能力很强,无需外力供油。对于自吸油型柱塞泵,液压油箱内的油液不得低于油标下限,要保持足够数量的液压油。液压油的清洁度越高,液压泵的使用寿命越长。 威格士变量柱塞泵结构形式 1)威格士柱塞泵是液压系统的一个重要装置。它依靠柱塞在缸体中往复运动,使密封工作容腔的容积发生变化来实现吸油、压油。柱塞泵具有额定压力高、结构紧凑、效率高和流量调节方便等优点,被广泛应用于高压、大流量和流量需要调节的场合,诸如液压机、工程机械和船舶中。 2)威格士柱塞和柱塞套是一对精密偶件,经配对研磨后不能互换,要求有高的精度和光洁度和好的耐磨性,其径向间隙为0.002~0.003mm 3)威格士柱塞头部圆柱面上切有斜槽,并通过径向孔、轴向孔与顶部相通,其目的是改变循环供油量;柱塞套上制有进、回油孔,均与泵上体内低压油腔相通,柱塞套装入泵上体后,应用定位螺钉定位。 威格士柱塞头部斜槽的位置不同,改变供油量的方法也不同。 编辑本段威格士油泵回油过程 ① 柱塞往复运动总行程L是不变的,由凸轮的升程决定。 ② 柱塞每循环的供油量大小取决于供油行程,供油行程不受凸轮轴控制是可变的。 ③ 供油开始时刻不随供油行程的变化而变化。 ④ 转动柱塞可改变供油终了时刻,从而改变供油量 威格士变量柱塞泵机械原理 威格士柱塞泵柱塞往复运动总行程L是不变的,由凸轮的升程决定。柱塞每循环的供油量大小取决于供油行程,供油行程不受凸轮轴控制是可变的。供油开始时刻不随供油行程的变化而变化。转动柱塞可改变供油终了时刻,从而改变供油量。柱塞泵工作时,在喷油泵凸轮轴上的凸轮与柱塞弹簧的作用下,迫使柱塞作上、下往复运动,从而完成泵油任务,泵油过程可分为以下三个阶段。 进油过程 当凸轮的凸起部分转过去后,在弹簧力的作用下,柱塞向下运动,柱塞上部空间(称为泵油室)产生真空度,当柱塞上端面把柱塞套上的进油孔打开后,充满在油泵上体油道内的柴油经油孔进入泵油室,柱塞运动到下止点,进油结束。 供油过程 当凸轮轴转到凸轮的凸起部分顶起滚轮体时,柱塞弹簧被压缩,柱塞向上运动,燃油受压,一部分燃油经油孔流回喷油泵上体油腔。当柱塞顶面遮住套筒上进油孔的上缘时,由于柱塞和套筒的配合间隙很小(0.0015-0.0025mm)使柱塞顶部的泵油室成为一个密封油腔,柱塞继续上升,泵油室内的油压迅速升高。 VICKERS威格士柱塞泵美国* 威格士VICKERS柱塞泵分类及工作原理 径向柱塞泵可分为阀配流与轴配流两大类。阀配流径向柱塞泵存在故障率高、效率低等缺点。上70、80年代发展的轴配流径向柱塞泵克服了阀配流径向柱塞泵的不足。由于径向泵结构上的特点,陕定了轴配流径向柱塞泵比轴向柱塞泵耐冲击、寿命长、控制精度高。变量行程短泵的变量是在变量柱塞和限位柱塞作用下,改变定子的偏心距实现的,而定于的zui大偏心距为5—9mm(根据排量大小不同),变量行程很短。且变量机构设计为高压操纵,由控制阀进行控制。故该泵的响应速度快。径向结构设计克服了如轴向柱塞泵滑靴偏磨的问题。使其抗冲击能力大幅度提高。 轴向柱塞泵是活塞或柱塞的往复运动方向与缸体中心轴平行的柱塞泵。轴向柱塞泵是利用与传动轴平行的柱塞在柱塞孔内往复运动所产生的容积变化来进行工作的。由于柱塞和柱塞孔都是圆形零件,加工时可以达到很高的精度配合,因此容积效率高,运转平稳,流量均匀性好,噪声低,工作压力高等优点,但对液压油的污染较敏感,结构较复杂,造价较高。 PVH074R01AA10B25200000100100010A PVH74C-RF-1S-10-C25V-31 PVH074R01AA10A250000001001AA010A PVH74C-RF-1S-11-C25-31 PVH074R01AA10B252000001001AA010A PVH74C-RF-1S-11-C25V-31 PVH074R02AA10A25000000100100010A PVH74C-RF-2S-10-C25-31 PVH074R02AA10B25200000100100010A PVH74C-RF-2S-10-C25V-31 PVH074R02AA10B252000001001AA010A PVH74C-RF-2S-11-C25V-31 PVH074R01AA10A25000000200100010A PVH74C-RSF-1S-10-C25-31 PVH074R01AA10B25200000200100010A PVH74C-RSF-1S-10-C25V-31 PVH074R01AA10A250000002001AA010A PVH74C-RSF-1S-11-C25-31 PVH074R02AA10A25000000200100010A PVH74C-RSF-2S-10-C25-31 PVH074R02AA10B25200000200100010A PVH74C-RSF-2S-10-C25V-31 PVH074R01AA10A250000001001AB010A PVH74QIC-RF-1S-10-C25-31 PVH074R01AA10B252000001001AB010A PVH74QIC-RF-1S-10-C25V-31 PVH074R01AA10A250000001001AE010A PVH74QIC-RF-1S-11-C25-31 PVH074R01AA10B252000001001AE010A PVH74QIC-RF-1S-11-C25V-31 PVH074R02AA10A250000001001AB010A PVH74QIC-RF-2S-10-C25-31 PVH074R02AA10B252000001001AB010A PVH74QIC-RF-2S-10-C25V-31 PVH074R02AA10A250000001001AE010A PVH74QIC-RF-2S-11-C25-31 PVH074R02AA10B252000001001AE010A PVH74QIC-RF-2S-11-C25V-31 PVH074R01AB10A250000001001AB010A PVH74QIC-RM-1S-10-C25-31 PVH074R02AB10A250000001001AE010A PVH74QIC-RM-2S-11-C25-31 PVH074R01AA10A250000002001AB010A PVH74QIC-RSF-1S-10-C25-31 PVH074R01AA10B252000002001AB010A PVH74QIC-RSF-1S-10-C25V-31 PVH074R01AA10A250000002001AE010A PVH74QIC-RSF-1S-11-C25-31 PVH074R02AA10A250000002001AB010A PVH74QIC-RSF-2S-10-C25-31 PVH074R02AA10A250000002001AE010A PVH74QIC-RSF-2S-11-C25-31 PVH074R01AB10A250000002001AE010A PVH74QIC-RSM-1S-11-C25-31 VICKERS威格士PVH098型号. PVH098R01AJ30A25000000100100010A PVH98C-RF-1S-10-C25-31 PVH098R01AJ30B25200000100100010A PVH98C-RF-1S-10-C25V-31 PVH098R01AJ30B252000001001AA010A PVH98C-RF-1S-11-C25V-31 PVH098R02AJ30A25000000100100010A PVH98C-RF-2S-10-C25-31 PVH098R02AJ30B25200000100100010A PVH98C-RF-2S-10-C25V-31 PVH098R02AJ30B252000001001AA010A PVH98C-RF-2S-11-C25V-31 PVH098R01AJ30A25000000200100010A PVH98C-RSF-1S-10-C25-31 PVH098R01AJ30B25200000200100010A PVH98C-RSF-1S-10-C25V-31 PVH098R02AJ30A25000000200100010A PVH98C-RSF-2S-10-C25-31 PVH098R02AJ30B25200000200100010A PVH98C-RSF-2S-10-C25V-31 PVH098R01AJ30A250000001001AB010A PVH98QIC-RF-1S-10-C25-31 PVH098R01AJ30B252000001001AB010A PVH98QIC-RF-1S-10-C25V-31 PVH098R01AJ30A250000001001AE010A PVH98QIC-RF-1S-11-C25-31 PVH098R02AJ30B252000001001AB010A PVH98QIC-RF-2S-10-C25V-31 PVH098R02AJ30A250000001001AE010A PVH98QIC-RF-2S-11-C25-31 PVH098R01AD30A250000001001AB010A PVH98QIC-RM-1S-10-C25-31 PVH098R01AD30A250000001001AE010A PVH98QIC-RM-1S-11-C25-31 PVH098R01AJ30A250000002001AB010A PVH98QIC-RSF-1S-10-C25-31 PVH098R01AJ30B252000002001AB010A PVH98QIC-RSF-1S-10-C25V-31 PVH098R01AJ30A250000002001AE010A PVH98QIC-RSF-1S-11-C25-31 PVH098R02AJ30A250000002001AB010A PVH98QIC-RSF-2S-10-C25-31 PVH098R02AJ30A250000002001AE010A PVH98QIC-RSF-2S-11-C25-31 PVH098R01AD30A250000002001AB010A PVH98QIC-RSM-1S-10-C25-31 PVH098R01AD30A250000002001AE010A PVH98QIC-RSM-1S-11-C25-31
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