Reduce the noise of installation techniques

(1) to control the heating temperature appropriate, bearing high temperature cause damage, the temperature is low enough ring expansion, the effect is not significant. 80 ~ 1000 ℃ heating temperature of the thermal expansion of the inner ring diameter, this to have the bearing of the over surplus quantity of the ordinary, is enough. (2) once you reach the required heating temperature, be about to install as soon as possible, so as to avoid cooling and installation difficulties. (3) bearing during cooling in the width direction also have shrinkage, therefore when installation to a certain pressure inner ring to the shoulder pressure, and with a very thin feeler attempt after cooling test, whether inside the gap between end face and shoulder. All in all, requires skilled, quick and accurate adjustment. ( 1) Decomposition, cleaning crank shaft components, ensure that the crankshaft internal oil clean and smooth. ( 2) Crankshaft for inspection, if there is any crack, must be replaced. Carefully check the crankshaft main journal, connecting rod journal and transition arc of all surface must not have scratches, burns and touch. ( 3) Check the crankshaft main journal and connecting rod journal, according to the grades of repair repair after dimension overrun. The crankshaft journal repair standard as follows: ( 4) Check the crankshaft journal and the hardness of connecting rod journal requirements, must conform to the technical requirements. Otherwise, it should be to deal with, in order to meet the use requirement. ( 5) Crankshaft thrust and radial circular runout, facing the main journal public axis radial runout, must conform to the technical requirements. Otherwise, must be corrected. ( 6) Connecting rod journal axis, within the span of main journal public axis parallelism must conform to the technical requirements. ( 7) Before and after the crankshaft gear with crack, damage, severe wear, should replace the crankshaft. ( 8) Crankshaft counterweight bolt if there is any crack, must be replaced. Crankshaft after replacement of balance or balance blocks of bolt, because of the dynamic balance test on crankshaft assembly, to ensure that the unbalance in conformity with the technical requirements. ( 9) Flywheel and pulley bolts if there are any cracks, scratches or elongation than the limit, to replace. ( 10) Carefully check the shock absorber of crankcase stand feet, such as, rubber aging, cracks, deformation or damage of crack, must be replaced. ( 11) When assembling crankshaft, pay attention to the main shaft tile, thrust tile installation. Check the crankshaft axial clearance and tighten the main bearing cover according to the requirement the vertical and horizontal bolt. For bearing equipment preventive maintenance, operation and peripheral parts was removed when changing suspension bearing checking, discriminant times demand, in turn, the condition of bearing parts can use again and record using the good from the bad. In order to find out and query to visit the amount of residual lubricant, sampling, to clean the bearing well. 一个。 Inner and outer ring, rolling body, confrontation and hear any crack and present pieces. b。 Inner and outer ring, rolling body and anyone with a shed. c。 Raceway surface, guard, significant injury of roller. d。 Confrontation of badly worn or loose rivet fierce. e. Raceway surface, rust and roller has a scar. f。 Had a remarkable indentation rolling surface, rolling body and make a mark. g。 Inner ring diameter or outer diameter on the creep. h。 Hot color changing fierce. 我。 Sealed bearing grease sealing and dust cover breakage to serious.