DAS组合封一、概述DAS组合封是个双作用的活塞密封件，由三部分组成：一个弹性体A、两个支承环B、两个导向环C。弹性体A有一个特别截面，三个密封唇口紧贴缸壁（动密封）。中间唇口较厚，起主要密封作用，其他两个唇口起辅助密封作用。底侧与活塞沟槽底部紧贴（静密封），接触面相对较大。支承环B置于A两侧起定位作用。来支承弹性体A并防止A出现径向密封间隙。支承环B呈阶梯状，与密封元件接触的一侧有许多凸块用以防止密封圈在工作时旋转。导向环C呈矩形，装在活塞上起导向和吸收轴向力的作用。导向环上下都开了几条轴向槽，使压力油能流过导向环，从而使弹性体A能感受全部工作压力并在换方向时快速释放压力。这样就很好的防止了在弹性体A前产生持续超高压。DAS组合封材料的硬度从内到外逐步增加，根据其特点，分别起到密封、支承和导向作用。DAS组合封为自紧双作用密封件。在初始状态，弹性体A变形产生一个径向预紧力，并随着系统压力的增加而增加，从而产生一个完全的密封作用力，即使系统没有压力也能起到密封效果。DAS总装图DAS受力示意图二、性能与用途DAS组合封是一个密封及导向元件只需一个沟槽的整体密封。装入封闭式沟槽，每个活塞用一个。紧凑的密封结构使活塞（油缸）总长度较短，降低了加工成本并有着极佳的抗间隙积压性能。工作时弹性体不会扭转，有着合理的泄漏一减少摩擦。主要用于活塞及液压缸的密封。如：推土机、挖掘机、装载机、起重机、液压闸门及农业机械等。三、材质A弹性体----丁晴橡胶B支承环----尼龙或聚氨酯C导向环----尼龙或聚甲醛四、工矿条件温度：-30℃～＋120℃最大工作压力：35MPa最大运动速度：0.5m/s介质：石油基液压油、难燃液压油、环保液压油规格及沟槽尺寸型号缸筒直径沟槽直径沟槽宽度活塞直径Ah9Bh9B1-0.05F+0.2F1+0.1A1-0.2DAS025-015/1DAS025-016DAS028-01925.025.028.015.016.019.021.022.025.012.013.513.54.02.12.123.024.027.0DAS030-021DAS032-022/1DAS032-02230.032.032.021.022.022.027.028.028.513.515.516.42.12.66.3529.031.030.5DAS035-025/1DAS035-025DAS040-02435.035.040.025.025.024.031.031.435.415.516.418.42.66.356.3534.033.538.5DAS040-026DAS040-030DAS040-030/140.040.040.026.030.030.036.035.436.015.516.412.52.66.354.039.038.538.0DAS040-030/2DAS042-028DAS045-02940.042.045.030.028.029.037.038.040.412.515.518.44.02.66.3539.041.044.0DAS045-031DAS045-035DAS050-03445.045.050.031.035.034.041.040.445.415.516.418.42.66.356.3544.043.548.5DAS050-034/1DAS050-038DAS055-03950.050.055.034.038.039.046.046.050.3620.520.518.43.14.26.3549.048.553.5DAS055-039/1DAS056-040DAS060-04455.056.060.039.040.044.051.052.055.420.520.518.43.13.16.3554.055.058.5DAS060-044/1DAS060-048DAS063-04760.060.063.044.048.047.056.056.058.420.520.518.43.14.26.3559.058.561.5DAS063-047/2DAS063-047/1DAS063-05163.063.065.047.047.051.058.459.059.019.420.520.56.353.14.261.562.061.5DAS065-049DAS065-050DAS070-05065.065.070.049.050.050.061.060.464.220.518.422.43.16.356.3564.063.568.3DAS070-054DAS070-058DAS075-05570.070.075.054.058.055.066.066.069.220.520.522.43.14.26.3569.068.573.3DAS080-060DAS080-062DAS080-06680.080.080.060.062.066.074.1576.076.022.422.522.56.353.65.278.379.078.5DAS085-065DAS090-070DAS090-07285.090.090.065.070.072.079.1584.1586.022.422.422.56.356.353.683.388.389.0DAS090-076DAS095-075DAS100-07590.095.0100.076.075.075.086.089.1593.1522.522.422.45.26.356.3588.593.398.0DAS100-082DAS100-086100.0100.082.086.096.096.022.522.53.65.299.098.5DAS105-080DAS110-085DAS110-092105.0110.0110.080.085.092.098.1103.1106.022.422.422.56.56.353.6103.0108.0109.0DAS110-096DAS115-090DAS115-097110.0115.0115.096.090.097.0106.0108.1111.022.522.422.55.26.353.6109.4113.0114.0DAS120-095DAS120-106DAS125-100120.0120.0125.095.0106.0100.0113.1116.0118.122.422.525.46.355.26.35118.0118.5123.0DAS125-103DAS125-108DAS130-105125.0125.0130.0103.0108.0105.0121.0121.0122.626.526.525.45.27.29.5124.0124.4127.5DAS130-105DAS135-110DAS135-110/1130.0135.0135.0105.0110.0110.0123.1127.6128.125.425.425.46.359.56.35128.0132.5133.0DAS140-115DAS140-115/1DAS140-118140.0140.0140.0115.0115.0118.0132.6133.0136.025.425.426.59.56.355.1137.5138.0139.0DAS140-123DAS145-120DAS145-120140.0145.0145.0123.0120.0120.0136.0137.6138.326.525.425.47.29.56.35138.5142.5142.95DAS150-125DAS150-125DAS150-128150.0150.0150.0125.0125.0128.0142.6143.0146.025.425.426.59.56.355.1147.5148.0149.0DAS150-133DAS155-130DAS160-135150.0155.0160.0133.0130.0135.0146.0147.6152.626.525.425.47.29.59.5149.5152.5157.5DAS160-138DAS160-143DAS165-140160.0160.0165.0138.0143.0140.0156.0156.0157.626.526.525.45.17.29.5159.0159.4162.5DAS170-145DAS175-150DAS180-150170.0175.0180.0145.0150.0150.0161.7166.7172.9525.425.435.412.712.76.35167.1172.1177.87DAS180-155DAS185-160DAS190-165180.0185.0190.0155.0160.0165.0171.7176.7181.725.425.425.412.712.712.7177.1182.1187.0DAS195-170DAS200-175DAS210-185195.0200.0210.0170.0175.0185.0186.7191.6201.625.425.425.412.712.712.7192.0197.0207.0DAS220-190DAS220-195DAS230-205220.0220.0230.0190.0195.0205.0212.7211.6221.635.425.425.46.3512.712.7217.0217.9227.0DAS240-215DAS250-220DAS250-225240.0250.0250.0215.0220.0225.0231.6242.9241.625.435.425.412.76.3512.7237.0247.85247.0昆山弘兴昌密封件主要产品为：液压油缸密封件、气缸密封件及汽车密封件等；当然包括各类：橡胶、四氟、聚氨脂非标件。类型如下：（一）聚氨脂液压油封，如：UHS、UN、UNR、UHR、UNP、Yx、KY及DH、FC防尘等；（二）聚四氟乙烯密封，如：GSF孔用方形圈（方形同轴密封）、GSJ轴用阶梯圈（阶梯形同轴密封）、组合封CST、GDKK、GKDF、GRS轴用回转方形圈、GNS孔用回转方形圈以及GST导向带（环）、挡圈、纳污环（防污染密封件）等；（三）橡胶液压密封，如：U形、Y形、Yx形、KY形及各类防尘圈等；（四）橡胶旋转密封，如：V形水封、骨架油封等；（五）基础密封，如：O形圈、星形圈、JB982组合垫圈等；（六）夹布酚醛树脂、尼龙、聚甲醛材料制作的导向套、支承环等。昆山弘兴昌电子有限公司的产品广泛适用于：工程机械，如：装载机、挖掘机、叉车、推土机等；压力机械，如：注射机、成型机、压铸机、锻压机床及各类泵、阀等；建筑机械，如：清扫机、垃圾车、压路机等；)