Stacker gearbox tooth surface gluing
The high-speed and heavy-duty gear transmission of the full-electric stacker forklift, the helical gear transmission with non-parallel axes and the hyperboloid gear transmission, due to the large relative sliding speed of the tooth surface and the large contact pressure, the sliding oil mold between the tooth surfaces is damaged, and the two tooth surfaces are damaged. Metal materials are in direct contact, and the local temperature is too high, and they are welded and bonded to each other, and the tooth surface forms tear marks along the sliding direction. This form of damage is called gluing.
Increasing the tooth thickness at the root of the gear teeth, increasing the radius of the root fillet, using high teeth, improving the coincidence degree, increasing the number of gear teeth meshing at the same time, improving the flexibility of the gear teeth, using high-quality materials, etc., all improve the pallet stacking. Measures for bending fatigue strength of wheel teeth. Reasonable selection of gear parameters and displacement coefficient, increasing the radius of curvature of the tooth profile, reducing the contact stress, improving the strength of the tooth surface, etc., can improve the contact strength of the tooth surface. The use of lubricating oil with high viscosity, high temperature resistance and high pressure resistance, improving the strength of the oil film, improving the strength of the tooth surface, and selecting the appropriate surface treatment method and coating of the tooth surface are the measures to prevent the tooth surface from gluing.
There are many types of gear materials, and there are many factors that should be considered when choosing. The following points can be used for reference when choosing materials:
1. The gear material must meet the requirements of the working conditions.
2. The size of the gear, the blank forming method, and the heat treatment and manufacturing process should be considered.
3. Normalized carbon steel.
4. Alloy steel is often used to make high-speed, heavy-duty and impact-loaded gears.
5. The gear transmission in the aircraft requires the gear size to be as small as possible, and high-strength alloy steel with surface hardening treatment should be used.
The common material for transmission gears is 20CrMnT, which requires subsequent carburizing and quenching treatment to improve surface hardness and refine material grains. In order to eliminate internal stress, tempering is also required.
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