Design Of Radial Runout Detection System For Pump Shaft And Impeller Ring

With the development of industry,pump products are widely used in various fields of industry.Pump mechanical transmission is essential,the pump shaft and impeller structure as an important drive in the pump is widely used.Therefore,the relevant indicators of these structures will affect the operation of the pump and technical indicators.Machining production parts index compared to the design indicators will always be biased,point,line,surface and other actual elements of the processed parts compared to the ideal elements always have errors.,the maximum allowable error is the geometric tolerance.Radial runout tolerance is an important form and position tolerances detection index.This indicator will cause the pump to run with heat and vibration,etc.,and even affect the pump life.Detection of this indicator can be used to analyze the causes of run-out error,thus optimizing the production and improving quality.The system uses a wireless transmission of digital dial indicator,non-contact measurement of the eddy current sensor and angle encoder as a detection instrument.Polar coordinates are established at various angles.The radial radial runout of the pump shaft journal,the mechanical radial runout of the impeller ring and the angle value are measured by these instruments.At all angles,electric radial circular runout of water pump shaft journal and mechanical radial circular runout of impeller ring are collected by these instruments,thus establishing polar coordinates.In this paper,Siemens PLC is lower machine to receive and process the data of eddy current sensor and angle encoder.At the same time,through OPC protocol,upload electrical runout and angle values,the dial indicator values and orders which are sent by the upper computer.Using the WinCC software to write programs as the host computer,controls the entire system of measurement data collection,display and data archiving.The resolution is 1?m.Through the analysis of the measured data,it is found that the installation eccentricity error has a sinusoidal rule on the result,the eccentricity error is processed by the least squares fitting method,and the feasibility of the experimental verification method.The runout of experimental data in the treatment is 85?m,eccentric error is 35?m,accounting for runout capacity of 80%.Dealing with gross errors using normal distribution fitting,retain the confidence interval in the 95% data to remove gross error.The system is designed according to the standard of the national standard for the measurement of radial runout.The man-machine interface of the host computer of the system can realize the visualization and control of data acquisition and storage,and eliminate the accidental error caused by manual reading.The processing of measured data can be more effective to remove the eccentric error and gross error of the measurement process,greatly reducing the impact of the error on the runout,improve the measurement accuracy to meet the design requirements.