Service Life Analysis of Drilling Pump Valve and Research on Vibration Control of Piping System
|School||Beijing University of Chemical Technology|
|Course||Chemical Process Equipment|
|Keywords||Drilling pump pump valve Fatigue life Stress concentration Pipeline vibration Damping measures|
The contents of the thesis is divided into two parts , the first part of the pump and valve life analysis of drilling pump . By drilling pump pump valve fatigue life , further clarify the failure mechanism of the pump and valve . Valve three-dimensional solid model , using ANSYS / LS-DYNA software build process the analog valve plate impact seat , the valve disc stress maps that analysis to the pulsating cyclic stress on the pump and valve fatigue damage . The analysis focuses on considering alternating loads , stress concentration brought the dangers of the the acceleration pump valve failure , to improve valve no impact theory . Estimate based on the the pump valve fatigue life curve , the service life of the pump and valve , and proposed new program a pump valve structure improvements , to some extent slowed the stress concentration further extend the pump and valve guide pump and valve design , life has a certain reference value . Another part of the paper is the pipeline damping method research . Serious for a factory centrifugal compressor outlet line vibration , resulting in the production frequent stops , not running smoothly , CAESAR Ⅱ and MATLAB software dynamic characteristics ( natural frequency of the air column , air flow pulsation ) of the gas pipeline system , the dynamic characteristics ( mechanical natural frequencies , mode shapes ) and stress conditions ( stress , secondary stress ) to do a detailed accounting . Combined with the results of the site visit , the main analysis to determine what caused the pipe vibration , and the corresponding damping measures . The face of conditions caused by the temperature load compressor nozzle force is too large , and a variety of ways to reduce the force , so to reach the equipment operational requirements . In this paper, damping optimized design methods and specific transformation measures can be directly applied to the actual plant .