Most of the gear teeth were broken from the root, and a few fracture surfaces were found to have a fracture boundary line. It can be concluded that some of the gear teeth have fatigue cracks before the gear teeth break. The broken teeth are all fragmented and there are no entire teeth. This and the curved tooth line are a circular arc, and the tooth surface is in contact with each other. The upper part of the broken gear has chipping and falling off. The possibility of gear breakage may be caused by large axial and radial forces, large bearing clearance and excessive tooth spacing during assembly. Based on the main characteristics of the curved tooth gear, the curved bevel gear has the characteristics of high bearing capacity, stable operation and low noise, but the tooth surface is in partial contact. Although the number of teeth meshed at the same time is larger than that of the spur gear, the total meshing area is not High, the compressive stress per unit area must be high. If the assembly quality is poor or the support foundation is weak, or even the gear manufacturing quality (heat treatment) is poor, it is inevitable that the gear teeth are broken.
The motor power is too large, and the power of the reducer is low, which cannot meet the requirements of heavy-duty transportation. If this is the case, the first-stage spur gears with a small number of modules and a small bearing capacity should be produced. So this inference is untenable. The reducer is a three-in-one reducer. When the local flat car is fully loaded, the total weight can reach 130T. When the brake is braked, the inertia force generated is large, causing the reducer to be reversely impacted when the brake is braked. The second gear The transmission design is relatively weak, and cracks are generated by repeated impacts, eventually breaking and breaking. On-site observation of the flat car empty car brake, almost no taxiing, and full sliding distance of about 200mm, the grounding car brake speed from 20m / min to 0, time less than 1s, we temporarily set the brake deceleration Calculated for 0.5 m/s2: F=ma=130000xx0.5m/s2=32500N=3.316T is indeed larger.
Since the lower line, the upper line and the storage area of ​​the coil are placed in the east-west direction, the V-shaped roll holder on the north-south walking flat car is placed horizontally on the upper surface steel plate, and the driving is in the process of lifting the plate roll. The center of gravity of the roll and the roll frame are more or less deviated. They fall on the 30° slope on one side of the roll frame, first generating a longitudinal component force, and the back plate rolling down the slope to the other side slope, due to the direction of movement and the horizontal direction. At 30°, the longitudinal force generated is much larger than the longitudinal force generated during the unwinding, and is proportional to the unwinding speed and the deviation distance. If the coil oscillates against the reel at the time of unwinding, the longitudinal force is even more immeasurable. In the conventional equipment inspection, the roll fixing bolt was cut off (M16X6/frame) and the reel was displaced. This inference is more reasonable.
cheap plastic injection molds and mould manufacturer 1-Start from part design analysis 2-Mold design drawing and DFM report available so you can see how is the mold going to be before mold making 3-If product is complex,moldflow report will be present as well 4-In house mold making shop ensure you mold quality under well control. 5-Normally it takes 20-40 days to make mold,precise time depends on part design
Thin Wall Mold,Thin Wall Container Mould,Thin Wall Mould,Ultra Thin Wall Injection Molding
Taizhou Zijing Plastic and Mould Co.,Ltd. , https://www.zijingmould.com