Influence of imbalance of balancing of crankshafts during engine repair

Abstract

Currently, tractors and other complex machines repaired at advanced repair enterprises perform worse than new ones and have a shorter overhaul life. Let us consider what losses in the quality of the car are not replenished even with a well-organized repair in compliance with the existing technical conditions and whether they are really recoverable. If during the repair the car was assembled entirely from new good-quality parts and the required technical conditions were observed during the assembly, then no loss of serviceability of the machine during repair could take place. This means that it is difficult to eliminate the losses associated with the use during repair, firstly, partially worn out (with acceptable wear and tear) and, secondly, restored parts. The experience of using agricultural machinery shows that by using maintenance and repair tools that do not require large investments, it is possible to significantly reduce the downtime of the machine and tractor fleet. With the introduction of new, more progressive technological processes into technology, an increase in the speed and power of technology, as well as with the tasks of automatic regulation and control of machines, machine designs have radically changed. along with the mechanical ones, the machines include hydraulic, pneumatic, electrical, electronic devices. The imbalance in the correction planes of the crankshafts assembled with a flywheel and clutch supplied to spare parts is 1.2-6.5 times and 1.3-10.7 times, respectively, higher than the allowable one. after grinding the main and connecting rod journals for repair dimensions, the imbalance of these assembly units is also 1.5-7.2 and 1.7-12.3 times greater than the permissible unbalance of the crankshafts and to develop recommendations for improving the balancing accuracy during engine repair.