Gear reduction motor

Gear Reduction. … The rotary machine’s output torque is improved by multiplying the torque by the gear ratio, less some effectiveness losses. While in many applications gear reduction reduces speed and improves torque, in additional applications gear decrease is used to increase swiftness and reduce torque.
actually mean?
On the surface, it could seem that gears are being “reduced” in quantity or size, which is partially true. Whenever a rotary machine such as an Conveyor Chain engine or electric motor needs the output speed reduced and/or torque increased, gears are commonly utilized to accomplish the desired result. Gear “reduction” specifically refers to the velocity of the rotary machine; the rotational rate of the rotary machine is usually “decreased” by dividing it by a gear ratio higher than 1:1. A gear ratio higher than 1:1 is usually achieved when a smaller gear (decreased size) with fewer amount of the teeth meshes and drives a more substantial gear with greater amount of teeth.

Gear reduction gets the opposite effect on torque. The rotary machine’s result torque is increased by multiplying the torque by the gear ratio, less some effectiveness losses.

While in lots of applications gear decrease reduces speed and improves torque, in various other applications gear reduction is used to increase rate and reduce torque. Generators in wind turbines use gear decrease in this fashion to convert a relatively slow turbine blade swiftness to a higher speed capable of generating electricity. These applications use gearboxes that are assembled reverse of these in applications that decrease rate and increase torque.

How is gear decrease achieved? Many reducer types are capable of attaining gear reduction including, but not limited by, parallel shaft, planetary and right-angle worm gearboxes. In parallel shaft gearboxes (or reducers), a pinion equipment with a particular number of tooth meshes and drives a larger gear with a lot more teeth. The “decrease” or equipment ratio is calculated by dividing the number of tooth on the large equipment by the number of teeth on the small gear. For example, if an electric motor drives a 13-tooth pinion equipment that meshes with a 65-tooth equipment, a reduction of 5:1 is achieved (65 / 13 = 5). If the electric motor speed can be 3,450 rpm, the gearbox reduces this swiftness by five occasions to 690 rpm. If the motor torque is certainly 10 lb-in, the gearbox raises this torque by a factor of five to 50 lb-in (before subtracting out gearbox effectiveness losses).

Parallel shaft gearboxes many times contain multiple gear pieces thereby increasing the gear reduction. The total gear reduction (ratio) is determined by multiplying each individual equipment ratio from each equipment established stage. If a gearbox consists of 3:1, 4:1 and 5:1 gear pieces, the full total ratio is 60:1 (3 x 4 x 5 = 60). In our example above, the 3,450 rpm electric motor would have its velocity reduced to 57.5 rpm by utilizing a 60:1 gearbox. The 10 lb-in electric electric motor torque would be risen to 600 lb-in (before effectiveness losses).

If a pinion gear and its mating gear have the same quantity of teeth, no decrease occurs and the gear ratio is 1:1. The gear is called an idler and its own primary function is to improve the path of rotation rather than decrease the speed or boost the torque.

Calculating the gear ratio in a planetary equipment reducer is less intuitive since it is dependent upon the number of teeth of sunlight and ring gears. The planet gears act as idlers and do not affect the apparatus ratio. The planetary gear ratio equals the sum of the number of teeth on sunlight and ring gear divided by the amount of teeth on the sun gear. For example, a planetary arranged with a 12-tooth sun gear and 72-tooth ring gear has a equipment ratio of 7:1 ([12 + 72]/12 = 7). Planetary gear sets can achieve ratios from about 3:1 to about 11:1. If more equipment reduction is necessary, additional planetary stages can be used.

The gear reduction in a right-angle worm drive would depend on the amount of threads or “starts” on the worm and the amount of teeth on the mating worm wheel. If the worm has two starts and the mating worm wheel has 50 teeth, the resulting gear ratio is 25:1 (50 / 2 = 25).

When a rotary machine such as for example an engine or electric motor cannot provide the desired output acceleration or torque, a gear reducer may provide a good solution. Parallel shaft, planetary, right-angle worm drives are common gearbox types for achieving gear reduction. Contact us with all of your gear reduction questions.