Abstract: Vacuum collection technique for sewage has been wildly used in ships, trains, construction and other fields. The pump station system, whose core component is vacuum crushing pump, is an advanced method for vacuum drainage technology. In this paper, refering to the patents of vacuum crushing pump by Jets company and other relative companies, the design difficulties for pulverized vacuum sewage pump are firstly analyzed, and the design computational formulas about the key parts are derived. Secondly, aiming at the servicing condition in our company, each part of the pulverized vacuum sewage pump is redesigned and optimized, and the model pump is finished. Finally, the experimental test is achieved for the moded pump. According to the test results, performance of the model pump can satisfy the operating requirements. However, some gaps even exist comparing to the calculating values, and further optimization is even necessary.

Key words: vacuum, pulverize, screw impeller, sewage, eccentric distance