Calibration device and calibration method for thermoelectric signal of sliding main bearing of marine diesel engine

Abstract

The invention relates to a marine diesel engine sliding main bearing thermoelectricity signal calibration device. The diesel engine sliding main bearing thermoelectricity signal calibration device comprises an industrial computer, a programmable logic controller, a servo driver, a data acquisition card, a motor, a front supporting bearing, a rear supporting bearing, an experiment bearing, a rotate speed sensor, a thermoelectricity sensor, a torque sensor, a tile back temperature sensor, a lubricating oil temperature sensor, a lubricating oil pressure sensor, a hydraulic cylinder, a hydraulic oil tank, a hydraulic pump, a lubricating oil tank, a lubricating oil pump, a lubricating oil heater, a hydraulic sensor, and a displacement signal sensor. According to the technical scheme, a flexible feedback control strategy is adopted, the steady transition of rising and falling rotation speed and regulation of loading is guaranteed, a stable variable working condition is provided for testing the bearings, and thus dynamic calibration of thermoelectricity signals is achieved.

Description

technical field [0001] The invention relates to the technical field of marine diesel engines, in particular to a calibration device and calibration method for thermoelectric signals of sliding main bearings of marine diesel engines. Background technique [0002] As one of the main friction pairs of the diesel engine, the eccentric shaft and the main bearing are the key components and wearing parts of the diesel engine. The eccentric shaft is subjected to complex forces during the movement process, and under the alternating load that changes periodically in the working cycle of the diesel engine, the main bearing is prone to heat and wear. The uneven and excessive wear of the main bearing will increase the bearing clearance, causing the impact of the journal on the main bearing to increase, which will directly affect the overall performance of the diesel engine; the excessive wear of the main bearing will also cause the cylinder liner, piston and piston ring The rapid wear a...

AI Technical Summary

Problems solved by technology

Severe main bearing wear can even lead to vicious accidents such as deformation of the eccentric shaft, melting and breaking of the eccentric shaft box, and explosion of the eccentric shaft box.

[0003] At present, the methods for monitoring the wear state of main bearings of marine diesel engines mainly include oil method, temperature method, vibration method and strain method. Due to the many sources of internal signal excitation of the diesel engine and the complex movement of moving parts, these methods cannot be real-time, accurate and accurate. Locate specific faulty main bearings

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