The utility model relates to a novel hydraulic shear which has the advantages of high pressure resistance, no medium leakage, long service life and low cost. Between the piston 1 of the hydraulic shear hydraulic transmission unit and the cylinder block 10, a new sealing technique is realized by using a media pressure to squeeze the sealing ring from the inner cavity 6 of the hollow sealing ring 5 so as to press the cylinder block 10 to realize sealing. Because the N shaped sealing ring hollow cavity, abrasion in a working stroke is small; while in the spring of 12 reduction of working stroke, sealing ring and cylinder body 10 friction wear slightly, very small; at the same time, the medium pressure seal extruded body seal from the inside, under the extrusion of the medium pressure of the rubber sealing ring uniform stress, deformation is small, no permanent deformation, n ring 5 working life is prolonged. The hydraulic shear of the invention not only increases the service life, but also has no medium leakage, can bear the pressure higher than the existing hydraulic shears, and the cost is greatly reduced compared with the existing hydraulic shears.
【技术实现步骤摘要】
一种液压剪 本专利技术涉及液压手动工具领域。众所周知,液压剪是液压手动工具领域中一项重要的设备,由液压传动部件、剪 刀部件等主要部件构成。液压传动部件工艺性能优劣对液压剪的质量有着决定性的作用。现有液压剪的活塞和端盖处动密封长时间来采用O形圈、Yx形圈及其组 合密封圈密封技术。在O形圈、Yx形圈等橡胶密封件密封技术中,工作介质压力 是从密封圈外部挤压密封圈体使其贴紧缸体和活塞杆表面而实现密封的,液压剪 工作时,液压传动部件密封元件在和缸体和活塞杆表面相对运动中很容易被损伤, 从而发生介质泄漏;如果工作介质压力过高,密封元件则会产生变形,介质穿越 而过,密封失效,导致现有的液压剪工作寿命短,不能承受高压,影响了液压剪 的使用效果。另外,由于密封元件与柱塞体和缸套之间的摩擦力很大,为保证弹 簧类复位机构工作顺利,凡是与密封圈的接触面,都要求高的加工精度,导致制 造成本高。而采用了组合密封圈密封技术后,由于组合密封圈价格昂贵,对各部 件加工精度要求更高,进一步使现有液压剪成本大幅上升。然而,由于其密封机 理和0形圈、Yx形圈等橡胶密封件密封技术基本上都一样,密封效果也并不 ...
【技术保护点】
一种耐高压的、无介质泄漏的、使用寿命长的新型液压剪;其特征是:液压剪液压传动部件的活塞1和缸体10之间采用工作介质压力从新型中空密封圈5的内腔6挤压密封圈体使其贴紧缸体10内表面而实现密封。
【技术特征摘要】
【专利技术属性】
技术研发人员:周磊,周承惠,
申请(专利权)人:北京纽希液压技术研究所,
类型:发明
国别省市:11[中国|北京]
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