How to prevent bearing INA Bearing burning diesel-Wenzhou Bearing wholesale

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How to prevent bearing INA Bearing burning diesel

点击数：4662 日期：2014/4/4

INA bearings The main reason is the diesel engine burning high temperature . INA Bearing poor working environment , so we want to maintain and improve prevention mainly INA bearings working conditions, preventive measures are the following: A strict engine block main bearing bore concentricity and roundness measurements. For the measurement of the body's main bearing bore concentricity must test out the engine body size more accurate concentricity , runout simultaneous measurement of the crankshaft , thus matching the thickness of the bush , so oily gap to reach consensus on each axis position . Where diesel happened bush , Speed , etc. , must be on the body of the main bearing bore concentricity for testing prior to assembly , ductile iron crankshaft whole grow at 0.14mm, all- steel crankshaft grow at 0.12mm, while the body bearing hole roundness , cylindrical have requested . If the limit is exceeded disabled, if within the limits , then using the grinding method ( ie, the amount of red lead powder coated in the bush , after loading the crankshaft rotates , then remove the bearing cap to bearing checking , hard points on the convex scraping the site after treatment , to measure the amount of change in size , thus ensuring reliability. 2 , improve maintenance and assembly quality INA bearings , strict control rod on the car pass rate. Improve the quality of the hinge with INA bearings , INA bearings ensure smooth and no spots on the back , positioning bump intact ; own bounce amount of 0.5 ~ 1.5mm, which can ensure the assembly with its own bearing and the bearing hole stretch fit tightly ; new and old link is always required to measure its degree of parallelism and twist , link to unqualified prohibition on the car ; each end mounted in the upper and lower bearing two bearing housings shall be higher than the flat 30 ~ 50mm, higher than the amount guaranteed by the specified torque after tightening bearing cap bolts bearing and housing closely with self-locking generate sufficient friction force , INA Bearing bearings will not loose, good cooling effect, prevent erosion and wear of the bearing ; bearing work surface can reach 75 % to 85% by scraping with a contact patch as measured by the standard method , you should make when not scrape with the gap on the bearing and journal meet the requirements. Also , pay attention to when assembling and processing quality checking crankshaft journal bearings , strict implementation of the repair process specifications , methods to prevent improper loading caused by installation errors and bearing bolt torque uneven or non-compliance , resulting in bending deformation and stress concentration, leading to early bearing failure . 3 , rational selection and add oil. In the course of the film surface tension to choose oil , so that the impact of the collapse of bubble formation when the role of the oil flow is reduced accordingly , to be effective in preventing bearing cavitation ; lubricant viscosity grade can not be increased , so as not to increase the bearing coking tendency ; lubricating oil of the engine must be within the standard range, lubricants and refueling tools must be clean , to prevent any dirt and water to enter, while ensuring the sealing effect of the engine ministries. Note that regular inspection and replacement of oil ; filling oil in place should be no pollution, no sand , to prevent the intrusion of all pollutants ; different quality , different viscosity grade and prohibit the use of different types of oil mix , oil filling ago The settling time is generally not less than 48h. 4 , proper use and maintenance of the engine . When installing INA bearings , shaft and the movement is to be in top coat bearings to provide grade clean oil. Engine bearings refitted after the initial start off before the fuel switch , starter drive with the engine idling times, when the engine oil pressure gauge showing and then turn , turn the fuel switch , and placed in the low-speed throttle position, start engine running observation. Idling longer than 5min. Well run-in operation of the new machines and overhaul engine run-in period , long banned in the run-in period fierce surge in load reduction and high-speed state ; engine working at full capacity after the end of a long , can not immediately stop, the engine must be allowed to empty contained in the low speed after 15min to stop, otherwise the internal heat does not go out on the loose

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