o型圈及橡胶制品手册

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1、O形圈及橡胶制品手册北京威塞欧机械技术有限公司索引第一章．O形圈介绍···············································································3第二章．O形圈材料···············································································3第三章．O形圈安装、应用、沟槽设计建议······································6第四章．产品系列与尺寸范围···············

2、··············································10（一）、AS568标准O形圈尺寸与公差········································10（二）、JISB2401标准O形圈尺寸与公差··································20（三）、部分非标O形圈规格尺寸···············································22（四）、弧形挡圈··················································

3、·························26（五）、星形圈规格·······································································28（六）、橡胶异型件·······································································29（七）、订货示例···········································································30第五章．O形圈储存条件及存

4、放年限················································30第六章．O形圈的失效形式与解决····················································30第一章．O形圈介绍1.1“O”形圈概述O形圈是安装在沟槽中、适量压缩的O形截面的密封环。在各种动密封或静密封的应用中，O形圈是一种有效且经济的密封元件。大部分标准用O形圈的内径d1和截面直径d2来定义。与其它型式的密封元件相比较，O形圈有许多优点：简单，整体式沟槽设计减少了零件与设计成本；设计紧凑，减小了零件尺寸；适用介质很广泛，有

5、油、水、各类化学物质、空气、各种气体等；安装简单，降低了装配成本及出差错的风险；适用于多种场合：动密封、静密封、单作用或双作用；大量标准尺寸在全球范围可供现货，节约成本，方便维护与修理。1.2密封机理橡胶密封圈放入密封沟槽中，一侧或两侧是要求被密封的流体介质。不论是受周围机械结构的机械压力作用，还是受液压流体传递的压力作用，弹性体通过变形（弹性的或非弹性的）来补偿间隙，形成“零间隙”，或者说阻止了被其密封的流体的流动。橡胶的弹性补偿了制造和配合公差，其材料内部的弹性记忆是维持密封的重要条件。OO第二章．O形圈材料2.1O形圈用材料性能的基本要求由于O形圈在挤压时产生应力，

6、发挥密封功能，所以要求O形圈的基本性能是在不引起异常变形的范围内保持适度的应力，尤其是在使用情况下。合成橡胶是具有这种性能的最优良的材料。但一种材料难以覆盖所有需要解决的问题，因此需要根据不同用途分别选用相应的材料。2.2O形圈用材料的种类和特征合成橡胶名称简称材料订货号邵氏适用范围SyntheticMaterial硬度ISO/TS16949VSEALApplicationrubbernameOrderingnumberHardnessN500液压、气动系统50黑色Black适用于液压油、水-油乳化液、N700丁腈橡胶NBRN70燃油、重油等。黑色Black耐甲、乙、丙、

7、丁烷，水中温N90090黑色Black度70℃，空气中温度90℃。C50050黑色BlackC700黑色(可调色)70防火料、耐温、耐老化及盐水氯丁橡胶CRCBlack（adjustable）性能，适用于制冷业C900黑色(可调色)90Black（adjustable）合成橡胶名称简称材料订货号邵氏适用范围SyntheticMaterial硬度ISO/TS16949VSEALApplicationrubbernameOrderingnumberHardnessE50050黑色BlackE700黑色(可调色)70耐蒸汽、热水、高