Helical Gear Speed Reducers
Provide high-efficiency speed decrease through 1, 2, 3, or 4 units of gears. Power is usually transmitted from a high-acceleration pinion to a slower-speed equipment. Helical gears generally operate with their shafts parallel to each other. The two most common types are the concentric (input and result shafts are in series) and parallel shaft (insight and output shafts are offset). Single-stage helical gear reducers are typically used for gear ratios up to about 8:1. Where lower speeds and higher ratios are necessary, dual, triple, and quadruple equipment reduction stages can be used.
Worm Gear Speed Reducers
A single reduction rate reducer can achieve up to a 100:1 reduction ratio in a small package. Known as right angle drives, these consist of a cylindrical worm with screw threads and a worm. With an individual start worm, the worm equipment advances only one tooth for every 360-degree change of the worm. So, regardless of the worm’s size, the apparatus ratio is the ‘size of the worm equipment to 1′. Higher decrease ratios can be created by using double and triple decrease ratios.
Basic Types of Gearboxes
The objective of a gearbox is to improve or reduce speed. As a result, torque output will be the inverse of the function. If the enclosed drive is a velocity reducer, the torque result increase; if the drive boosts speed, the torque output will decrease. Gear drive selection factors include: shaft orientation, speed ratio, design type, nature of load, gear ranking, environment, mounting position, working temperature range, and lubrication.
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