武汉恒斯源液压机电设备有限公司
 
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当泵(或马达)的效率降低时．方面会增大传动轴的负载；另方面会将损失的能量转变为热能，使油温升高．粘度降低。泵(或马达)的功率和效率是否正常，是衡量泵(或马达)使用寿命的主要标志。 (1)泵的输人功率=泵的输入转矩或电机的输出转矩*泵的角速度 (2)泵的理论输出功率和机械效率。

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