1983年,我厂由原用的3BA-9氨水泵改用自制的80FB-100氨水泵,填料改用机械密封,通过近4年的使用实践证明,在运行中基本上达到不泄漏,检修一次可使用半年左右。1.结构和原理我厂氨水泵机械密封属于外装、内流、静止式、单端面、单弹簧、平衡型机械密封。它由叶轮1、动环2、静环3、密封圈4、防转销5、弹簧前座6、弹簧套7、弹簧后座8,弹簧9和泵轴10组成,如下图所示。 In 1983, our factory changed from the original 3BA-9 ammonia pump to the homemade 80FB-100 ammonia pump, and the packing was changed to mechanical seal. After nearly 4 years of practice, it was proved that it basically did not leak during operation and overhaul Can be used for about six months. 1. Structure and Principle Our ammonia pump mechanical seal belongs to the exterior, inflow, static, single-end, single spring, balanced mechanical seal. It is composed of impeller 1, moving ring 2, stationary ring 3, seal ring 4, anti-rotation pin 5, spring front seat 6, spring cover 7, spring seat 8, spring 9 and pump shaft 10, as shown below.