Lubricating wear state monitoring device and method for main bearing of diesel engine

Abstract

The invention discloses a lubricating wear state monitoring device for a main bearing of a diesel engine. The device comprises an upper bearing bush, a lower bearing bush, a main bearing seat and a main bearing cover. A counter bore is formed in the center line of the main bearing cover, a blind hole a and a blind hole b are formed in the two sides of the center line at an included angle of 45 degrees respectively, and an ultrasonic sensor probe a is arranged in the blind hole a and sequentially connected with a pulse reflection type thickness gauge a and a computer through wires. An ultrasonic sensor probe b is arranged in the blind hole b. The ultrasonic sensor probe b is sequentially connected with a pulse reflection type thickness gauge b and a computer through wires. An acceleration sensor is arranged in the counter bore and is sequentially connected with a signal acquisition instrument and a computer through leads. The device is simple in structure and easy to install and operate. The lubricating state of the main bearing can be monitored in real time, the abrasion degree of the main bearing is obtained, safe operation of a diesel engine is guaranteed, and maintenance time and labor cost are saved.

Description

technical field [0001] The present invention relates to a diesel engine main bearing lubricating wear state monitoring device and method, in particular to the installation arrangement of an ultrasonic sensor and an acceleration sensor, which are used to detect the motion track of the crankshaft shaft center and the vibration of the main bearing cover, and then obtain the minimum oil film thickness of the main bearing, the bearing bush The wear depth and vibration characteristics belong to the technical field of diesel engine safety operation monitoring. Background technique [0002] For the main bearings of marine diesel engines, the traditional bearing wear detection method is to stop the machine and disassemble the bearings, and determine the bearing wear status through observation and measurement. However, marine diesel engines have high operating frequency, long intervals for regular shutdown and maintenance, and complicated disassembly. It is obviously difficult to meet...

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Problems solved by technology

The disadvantage of this invention patent is that although the position of the faulty bearing can be found in the multi-speed main bearing and the degree of wear can be judged, the thermoelectric potential signal can only be read after the main bearing and the crankshaft come into contact, and the change of the minimum oil film thickness cannot be judged , the structure of the measuring device is complex, the installation process is cumbersome, and the applicability is poor

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