我厂使用的y型油泵已达22个品种,共241台,占全厂各装置总泵数的55%。经多年生产实践证明。y型油泵有结构紧凑、重量轻;零部件通用性高。互换性好;造价低的优点。但也存在下列缺点:(1)结构刚度差,振动大,运行不稳定,常引起机械密封泄漏;(2)轴承箱冷却、密封效果差,轴承润滑不良。寿命低;(3)泵分档稀、规格少,常造成选型过大,泵出口节流损失大,泵的实际效率很低(见表1)。我们认为,结构刚度差,轴承箱冷却、润滑不好是造成Y型泵使用可靠性差、故障 Y-type pump I plant has reached 22 varieties, a total of 241 units, accounting for the plant’s total number of units of the pump 55%. After years of production practice proved. Y-type pump has a compact, light weight; high versatility of parts. Good interchangeability; low cost advantage. But there are also the following disadvantages: (1) poor structural rigidity, large vibration, unstable operation, often causing mechanical seal leakage; (2) bearing housing cooling, poor sealing effect, poor bearing lubrication. Low life expectancy; (3) the pump sub-file dilute, small size, often resulting in the selection is too large, the pump export loss of large throttle, the actual pump efficiency is very low (see Table 1). We believe that poor structural rigidity, bearing housing cooling, poor lubrication is caused by the use of Y-pump reliability is poor, fault