How do you design a reduction gear?
The “reduction” or gear ratio is calculated by dividing the number of teeth on the large gear by the number of teeth on the small gear. For example, if an electric motor drives a 13-tooth pinion gear that meshes with a 65-tooth gear, a reduction of 5:1 is achieved (65 / 13 = 5).
How do you reduce pulley speed?
By changing the diameter of the pulley wheels, speed can be changed. A smaller pulley turning a larger pulley results in the larger one moving more slowly but with more shaft power.
How do you calculate RPM for pulleys?
There are complicated formulas for determining pulley ratios but in generic, layman terms, simply divide the driven component (pump) by RPM, the driver component (motor or engine) rated by RPM to get the required ratio. In the example below, the pump RPM is 1070, for full output, while the motor is 1750 RPM.
How does gear reduction work?
A reduction gear is an arrangement by which an input speed can be lowered for a requirement of slower output speed, with same or more output torque. The high speed incoming motion from the wheel work is transmitted to the set of rotating gears, wherein the motion or torque is changed.
How do you design a gear?
For design of gears, determine elements such as size, tooth shape, pitch, number of teeth, amount of profile shift, material, need for heat treating and/or grinding, choice for kind of tooth surface finish, amount of backlash, helix angle, helix direction, method of mounting on shaft, precision class, etc., the …
What does a smaller pulley do?
If a smaller pulley turns a larger one, the larger one will turn slower, but with more power available at the shaft. If a bigger pulley turns a smaller one, the smaller one will turn much faster than the bigger one but with less power available at the shaft.
Which pulley will turn faster?
A larger pulley turning a smaller pulley results in the smaller one turning faster but with less shaft power. For example, a truck in high gear would have a slower turning engine but faster turning wheels, resulting in a faster truck.
What is pulley ratio?
Calculate the pulley ratio by dividing the pulley’s pitch diameter by the pitch diameter of the drive pulley. For example, suppose the drive-shaft has a diameter of 2.2 inches, and two pulleys driven by the belt have diameters of 4.4 inches and 2.8 inches. The first ratio is: 4.4 2.2 = 2 \frac{4.4}{2.2}=2 2.
How does pulley increase torque?
Increasing Power (torque): When the powered pulley is smaller than the non-powered pulley then the speed of the non-powered pulley is slower in proportion to the circumferences of the pulleys. But the power in the 2nd pulley is increased proportionally.
How is a 2 inch pulley like a gear reduction?
Think of the pulley system as a gear reduction. A 2 inch pulley driving a 4 inch pulley reduces the speed in half. If you get a 2 inch pulley and a 4 inch pulley on a 1/2 inch intermediate shaft with pillow block bearings on each end, mounted on a frame of some sort, and drive the 4 inch pulley with the 2 inch on the motor,…
What are the different types of pulley mechanisms?
Basic Pulley Mechanisms: From tank treads to bike gears to fishing lines, pulleys are used all over the place when it comes to mechanical transmissions. All types of pulley mechanisms consist of some sort of flexible belt (chain, cable, rope, etc.) turning around the circum…
What is the diameter of a driven pulley?
Diameter and speed of driving pulley and diameter of driven pulley are known. D1 = Diameter of driving pulley 15 in, RPM 1 = 180 (driving pulley speed), d2 = Diameter of driven pulley 9 in, RPM 2 = Speed of driven pulley, RPM 2 = 15 × 180 9 = 300 RPM.
Which is an advantage of belt and pulley system?
Another advantage of a belt and pulley system over a gear system is that the direction of rotation is conserved on a standard belt and pulley drive (although it can be altered). If the drive pulley spins a certain direction, the driven pulley will too.