Turbocharger Common Faults and Preventive Measures
Fiber Post,Dental Post,Fiber Posts Dental Radiography Co., Ltd. , http://www.nsdentals.com
December 20 02:02:07, 2018
The turbocharger leakage is classified into two categories: oil leakage in the compression section and oil leakage in the exhaust port. The breakdown is as follows. 1. Oil Leakage from the Compressor 1. Oil Leakage Due to Failure of Oil Retaining Ring and Sealing Ring (1) Signs Burning oil during engine operation. Smoke is blue and power is not reduced. Open the outlet of the air compressor and attach it to the pipe wall. Organic oil. (2) Cause The oil eroding ring and the seal ring at the front end of the compressor oil retaining ring cause oil leakage. (3) Remedy Replace the oil throw ring and seal ring. 2. Oil leakage caused by blockage of air filter (1) Signage Engine oil burns at the time of engine operation. Smoke power drops, and there is no organic matter on the air intake hose wall. (2) Cause During the air inhalation by the supercharger, the air filter is blocked, so that the degree of vacuum in the intake pipe is increased, and the pressure at the air compressor intake port is lowered, thereby causing the oil to infiltrate into the compressor and bearing the air together. Into the cylinder combustion. (3) Remedy Check and eliminate the cause of the increase in intake resistance. Clean or replace the air filter element. 3. Oil Rejection Causes Oil Leakage (1) Signage Burning Oil (2) Cause Turbocharger return pipeline is blocked, oil return flow is not smooth, oil in the middle bearing of vortex rotor assembly is accumulated excessively, pressure is high, oil is along the air compressor leaf Axle leakage causes burning oil. (3) Remedy Remove the oil return pipe and clean it. 2. When the turbocharger exhaust end of the turbo exhaust oil, the leaked oil will be unsafe to burn with the high temperature exhaust gas in the exhaust pipe; when serious, a large amount of oil droplets will be discharged from the exhaust pipe; the exhaust connection pipe will be removed and visible. Turbine exhaust port traces of organic oil. Most of the failures are caused by failure to replace lubricating oil regularly, and the oil filter is not cleaned in time, so that the seal ring of the turbocharger is seriously worn, and the gap between the seal ring and the intermediate body of the rear panel of the fortifier is increased, resulting in the oil entering the compressor or turbine. Inside the shell. Replacement is usually done by replacing the seal ring on the turbine shaft (0.03-0.07 mm clearance on the side of the seal ring). Supercharger full-floating bearing damage turbocharger turbine rotor bearing damage, the sign is generally a significant decrease in turbocharger speed, engine power is reduced, exhaust smoke. The causes are mostly lubricated measuring contamination, resulting in deterioration of the lubrication condition of the rotating parts, plugging of the oil holes, sintering and stagnation of the bearing and rotor shaft, and a serious decrease in the rotation speed; thus destroying the balance accuracy of the turbine and rotor shaft assembly and fittings. The gap causes the turbine blade to rub against the inner surface of the turbine shell, the radial and axial swing of the turbine rotor assembly increases, and the supercharger efficiency decreases. Should generally use the method of dismantling and repairing at the conditional maintenance point to solve this fault, if necessary, replace the rotor bearing and rotor assembly. Measures to prevent turbocharger failure Due to the extremely high speed of the turbocharger shaft during operation, the following measures must be taken during use to ensure normal operation. (1) Use the lubricant properly and replace it according to the specified period. (2) Timely maintenance and replacement of air filter element. (3) After the diesel engine is started, it should be idling at low speed for a few minutes to allow the oil pressure and temperature to rise and stabilize before it can be loaded. Otherwise, the full-floating bearing will be poorly lubricated due to lack of oil, and it will be severely worn or even burned. (4) When the oil viscosity in the lubricating oil passage in cold weather is still high, the diesel engine may not suddenly increase the rotational speed and load. (5) Before replacing the supercharger, lubricating oil, oil filter or starting the diesel engine after shutdown for more than one week, the turbocharger tubing connection must be released to inject clean lubricant to make the supercharger lubrication system full of oil; Drive the diesel engine so that the lubricating oil reaches the turbocharger before starting the diesel engine. (6) It is forbidden that the idle time of the diesel engine is too long, generally not exceeding 5 minutes. Because of the low lubricating oil pressure during idling operation, it is not conducive to supercharger lubrication, which easily leads to bearing wear or ablation. (7) After high-speed and full-load operation, do not stop suddenly without special conditions. Slow down slowly and turn off the engine after a few minutes to avoid overheating the bearings and shafts. (8) Operation should always pay attention to whether the supercharger has abnormal noises and vibrations. If there is abnormality, it should be stopped immediately.