The Main Bearing Cap Assemble Process Research Of GEVO16 Engine

Based on the GEVO16 diesel engine main bearing cap structure and the structure of the analysis, confirmed the general assembly in the main bearing cap of the assembly process must ensure that the body reached the processed data and other related coaxial size requirements. Fastening bolt on the level of technology research, analyzed the advantages and disadvantages of various fastening methods to determine the level of the bolts after using the torque - angle for tightening. And the assembly sequence and processing time must also be consistent with the assembly sequence, need to tighten the left and then fix the right, but also in the main bearing bolts are tightened in the course of tightening again after release.The main bearing bolts fastening of the bolts fastening bolts in a separate thread during the force and the nuts bolts and other fastening force after the change. Because of the stress bolt main bearing large deformation of the main bearing bolts thread inequality is greater than common thread contains major. The main bearing anti-loose nut calculated on loose methods of prevention, that the main bearings can achieve self-locking nut, but the anti-loose approach on the basis of actual need, just screw teeth painted on the right amount of oil can .The main bearing on the determination method of bolt elongation and the main bearing bolts were compared pre-extension method, main bearing bolts that pre-elongation method is more accurate. On this basis, the main bearing bolts of static state force and the work carried out under the stress analysis and calculation, by analysis and calculation, the basic bolt main bearing to determine the yield strength in the context of pre-elongation was 2.4mm, then pull yield stress, tensile stress is about 68%.The light of other related products The principle and GEVO16 stretch of Main Bearing cap tightening process requirements, relying on principles of hydraulic design of the main bearing bolts stretch, and then on the main bearing bolt tension calibration device, and good reproducibility, can be use. At the same time using the main bearing bolts bolt tension device and the level of electric wrenches and other tooling in accordance with the process set for fastening, fastening assembly after the data fully in line with requirements, so the preceding analysis and calculations are correct. Of the process do not follow the consequences are also analyzed.On the issue of frequent breakdown of equipment and the quality of the main bearing bolts, etc. for the analysis of, and solutions to problems later analyzed. However, quality problems in the actual process of emerging, such as main bearing cap size tolerance, the main bearing bolt mounting hole processing bad, bad, etc. processing bolts level phenomenon, but as long as the assembly process to operate in strict accordance with, even if there are quality problems in some parts can also be found in the assembly stage, to avoid the occurrence of a large mass, and therefore verify the main bearing cap assembly process is appropriate.