小型通用离心泵在农户中保有量很大,其易损件水封可能在出现憋泵(出水管较长时间不出水)现象后损坏;在喷洒药液后因腐蚀作用大,水封更易损坏。由于结构上的原因,水封损坏后,水液可直接进入轴承腔内,导致轴承受损。可以采用锯割一安全槽口的办法解决上述问题。现以图1所示的配套功率750W、流量 Small universal centrifugal pump in the farmer to maintain a large amount of its vulnerability seal may appear in the pump hold (out of water for a long time no water) after the phenomenon of damage; due to the corrosive effect after spraying the liquid, the water seal is more vulnerable to damage . Due to structural reasons, water seal damage, the water can be directly into the bearing cavity, resulting in bearing damage. Saw a safety notch can be used to solve the above problems. Now shown in Figure 1 supporting power 750W, flow