Life detection method of mechanical seal of nuclear-stage centrifugal pump based on equipment maintenance data
A technology of mechanical seals and detection methods, applied in the testing of mechanical parts, mechanical equipment, and machine/structural parts, etc., can solve problems such as blanks, and achieve the effect of reducing operating costs and improving safety.
Active Publication Date: 2019-03-12
CNNC NUCLEAR POWER OPERATION MANAGEMENT +1
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Problems solved by technology
Therefore, nuclear-grade centrifugal pump equipment has high requirements for the safety of mechanical seals. At present, the trend analysis of the life cycle of nuclear-grade centrifugal pump mechanical seals at home and abroad is still blank.
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Embodiment Construction
[0023] A method for detecting the lifetime of a nuclear-grade centrifugal pump mechanical seal based on equipment maintenance data, the method specifically includes the following steps:
[0024] Step 1. Select the key parameters of the nuclear grade centrifugal pump life cycle change;
[0025] According to the historical life data of nuclear-grade centrifugal pumps in nuclear power plants, the key influencing factors that reflect the life-cycle changes of nuclear-grade centrifugal pumps are determined, mainly including wear of mechanical seal surfaces, wear of O-rings and changes in spring compression;
[0026] Step 2. Collect data on factors affecting the lifetime of mechanical seals of nuclear-grade centrifugal pumps during major overhauls of nuclear power plants;
[0027] For previous overhauls of nuclear power plants, the wear amount of the mechanical sealing surface, O-ring wear amount, and spring compression amount data in nuclear-grade centrifugal pumps were collected, ...
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The invention relates to the technical field of reliability management of nuclear power plant equipment, and particularly discloses a seal life detection method of mechanical seal of a nuclear-stage centrifugal pump based on equipment maintenance data. The method comprises the following steps that 1, key parameters of the life change of the nuclear-stage centrifugal pump is selected; 2, the life influence factor data of the mechanical seal of the nuclear-stage centrifugal pump during all previous overhaul period of the nuclear power plant is collected; 3, trend fitting is performed on the lifeinfluence factors of the nuclear-stage centrifugal pump; 4, a trend fitting of the life of the mechanical seal of the nuclear-stage centrifugal pump is performed by utilizing the trend fitting curveof the life influence factors of the nuclear-stage centrifugal pump; and 5, and the life of the mechanical seal of the nuclear-stage centrifugal pump ia predicted according to the trend fitting curveof the life of the mechanical sea of the nuclear-stage centrifugal pump. According to the seal life detection method of the mechanical seal of the nuclear-stage centrifugal pump based on the equipmentmaintenance data, the life of the mechanical seal of the nuclear-stage centrifugal pump can be predicted scientifically and reasonably, the operation safety of the nuclear power equipment is improved, and the operation cost is reduced.
Description
technical field [0001] The invention belongs to the technical field of equipment reliability management of nuclear power plants, and in particular relates to a method for detecting the service life of nuclear-grade centrifugal pump mechanical seals based on equipment maintenance data. Background technique [0002] The nuclear grade centrifugal pump is an important part of the nuclear power plant system and one of the important links to maintain the normal operation of the nuclear power plant system. Considering the needs of nuclear power plant radioactivity containment, the safety of pump equipment is very important for the safe, reliable and economical operation of the nuclear power plant. plays an important role. [0003] The mechanical seal is one of the important components of the centrifugal pump, and its service life has a direct impact on the service life of the pump. According to statistics, nearly 40% of the common failures of pump equipment are caused by the leaka...
Claims
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IPC IPC(8): F04D15/00G01M13/00
CPCF04D15/0088G01M13/00
Inventor 胡宇杰张民李建春王苗苗岳春生麻浩军聂成平杨鸿翔刘小年李云吕刚刘健
Owner CNNC NUCLEAR POWER OPERATION MANAGEMENT