Device for detecting coaxiality of main shaft hole and large oil seal hole of diesel engine block

Abstract

The invention belongs to the technical field of manufacturing and repairing of benchwork machinery, and provides a device for detecting the coaxiality of a main shaft hole and a large oil seal hole of a diesel engine block. The provided device for detecting the coaxiality of the main shaft hole and the large oil seal hole of the diesel engine block comprises a mandrel (4) and a lever type measuring mechanism, wherein the mandrel (4) is a step shaft with two steps; mandrel outer rings (1) are sleeved on the two steps on the mandrel; the lever type measuring mechanism arranged at the other end of the mandrel (4) comprises a bracket (10), a cross beam (7), a centre (13) and a dial indicator (8); the cross beam (7) is arranged in parallel to the mandrel (4) and is hinged with the bracket (10); the centre (13) is fixed at one end of the cross beam (7); and the dial indicator (8) is fixed at one end of a bracket cross arm, and an indicator rod of the dial indicator is connected to the other end of the cross beam (7). The device achieves the purpose of the requirement on the coaxiality of the main shaft hole and the large oil seal hole of an engine when a diesel engine of a locomotive is assembled.

Description

technical field [0001] The invention belongs to the technical field of railway diesel locomotive manufacture and repair, and mainly provides a coaxiality detection device for a main shaft hole and a large oil seal hole of a diesel engine body. Background technique [0002] Diesel locomotive diesel engine has a large appearance size and high speed, so oil leakage is prone to occur at the seal of the crankshaft output end of the diesel engine. In order to prevent the splashed engine oil in the crankcase and the oil on the crankshaft journal from leaking to the outside of the diesel engine body, an independent, split-type oil seal device with mechanical sealing effect is designed. Due to the adoption of an independent, cut-and-splitting oil seal device, the coaxiality between the main shaft hole of the machine body and the large oil seal hole is extremely critical in the maintenance and assembly process of the diesel engine. If the coaxiality between the large oil seal hole an...

AI Technical Summary

Problems solved by technology

If the coaxiality between the large oil seal hole and the main shaft hole of the engine body cannot be guaranteed during the installation process, the crankshaft and the oil seal will interfere with the diesel engine during operation or the sealing effect will not be achieved, causing the oil in the crankcase to leak outward, resulting in A large amount of oil loss and serious contamination of the body surface

For a long time, there is no suitable measuring device for the detection and adjustment of the coaxiality of the oil seal and the engine body, resulting in frequent quality accidents of oil seal failure, and due to insufficient consideration of the position design and maintainability of the oil seal in the installation of the diesel engine, maintenance It is very difficult, increases the labor intensity, and wastes a lot of manpower and material resources

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