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- Selection of requirements and grade determination of serpentine spring coupling
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Elastic sleeve pin coupling for pump
TAG
For pumpElastic sleeve pin coupling在两半联轴器凸缘孑L内装有弹性套(橡胶材料)的柱销,以实现两半联轴器的连接。泵用弹性套柱销联轴器曾经是应用广泛的泵用联轴器。
泵用弹性套柱销联轴器是利用若干非金属弹性材料制成的柱销,置于两半联轴器凸缘孔中,通过柱销实现两半联轴器联接,该联轴器结构简单,容易制造,装拆换弹性元件比较方便,不用移动两联轴器。
弹性元件(柱销)的材料一般选用尼龙6,有微量补偿两轴线偏移能力,弹性件工作时受剪切,工作性极差,仅适用于要求很低的中速传动轴系,不适用于作性要求较高的工况,例如起重机械的提升机构的传动轴系不能选用,不宜用于低速承重及具有强烈冲击和振动较大的传动轴系,对于径向和角向偏移较大的工况以及安装精度较低的传动轴系亦不应选用,属淘汰品种。弹性柱销联轴器轴中的柱销在工作时处于剪切和挤压状态,其强度条件就是计算弹性柱销横截面上的剪切强度和柱销与销孔壁的挤压强度。
泵用弹性套柱销联轴器特点:
①The pin of the elastic sleeve pin coupling is covered with a rubber ring, which has elasticity and the ability to compensate the axis displacement, but when the relative angular displacement is large, it is easy to wear;
②Simple structure, convenient installation, easy replacement, small size, light weight, large transmission torque, widely used in various rotary pumps;
③The allowable relative radial displacement is 0.14-0.2mm; the allowable relative angular displacement is 0 degrees 40 minutes;
④ The additional radial load caused by the relative displacement of the two shaft axes is (0.1-0.3)P;
⑤水泵行业的标准为Bll01,其较大许用转矩为8316N·m,较大轴径为200mm。
泵用弹性套柱销联轴器的不足:
◆由于泵用弹性套柱销联轴器选用的材质为铸铁,其重量为38.8千克,使电机在供水运转过程中浪费了许多电能,影响了机组效率,增加了运行成本。
◆因为泵用弹性套柱销联轴器的拆卸非常麻烦,所以在检修水泵和电机时很容易使铸铁泵用联轴器变形或损坏。
◆泵用弹性套柱销联轴器对两轴相对径向位移要求较高,为0.2~0.6mm,给联轴器同心度的找正带来很大的难度。另外,在运行过程中由于螺栓松动,会使水泵机组振动和噪声加大。