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Abstract: A lot of data obtained from laboratory test and spot test are analyzed, by applying the theory of the fault process in a maintainable system. The life distribution rules of the reliability data for submersible motor-pump have been presented and proved. The failure distribution of submersible motor-pumps accords with Weibull
distribution in their whole life. The failures belong to early failures
when the use time of submersible motor-pumps is less than 600 h. The
failures remain with random failures when the use time is more than 600 h but is less than 3 200 h. And the failures belong to wear-out-failures when the use time is more than 3 200 h. If the submersible mo-tor-pump is fully milled, the
failure can be analyzed with exponential distribution, or it should be analyzed with Weibull
distribution. The test results show that the primary measurements that quality of submersible motor-pump is improved are to improve the quality of mechanical seal sets and safeguards. At the same time, the search shows practical value in reliability assessment and reliability design.
Key words: Submersible motor-pump Test
Failure distribution
CLC No: TH318
2003年农业部行业标准制定资助项目(05285). Received 20060220, received in revised form 20061009
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