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本文提出一种压力泵中电磁马达含外壳的衬套应力计算新方法．考虑了前体部分－轴承护罩（左边）和马达定子（右边）之间的衬套应力变形状态．确定了危险截面上最大应力，以及外壳厚度和工艺间隙对应力的影响．
In this paper, a new method for calculating the stress of bushing with casing of electromagnetic motor in pressure pump is presented. Consider the stress-strain state of the bushing between the precursor part - the bearing guard (left) and the motor stator (right). The maximum stress on the dangerous cross section and the influence of the shell thickness and the process gap on the stress were determined.