Gearboxes are equipment that are used in many factories, basically, gearboxes transfer power from one machine to another, and the main thing is to find out how much torque is required for the machine in which we want to use the gearbox.
In fact, gearboxes transfer mechanical power from an engine to a device or vice versa. Generally, in all gearboxes, power is transferred through a shaft.
There are different gears in gearboxes, usually the smaller gear is called the pinion and the bigger gear is called the gear. Depending on the speed and torque of each gear wheel, the speed and torque of the opposite gear can be obtained.
Torque is a force that enters a gear in the form of a wheel, the combination of several gears in a gearbox causes power and torque to be transferred from one side of the shaft to the other side of the gearbox.
For example, if we consider two gears, the pinion gear has a higher wheel speed, and in fact produces less torque, and the opposite gear has more torque and lower speed, the transmission ratio is actually the result of obtaining the same rotation ratio of the two gears.
Gearboxes have an input shaft that causes power to enter the gears from the engine. The output speed or torque increases or decreases according to the reduction or increase coefficients of the gearbox.
Among the important things in choosing the right gearbox for the right engine is the type of machine doing the work, the temperature of the working environment, the environmental conditions (dust, humidity, etc.), the drive motor, the type of connection between the gearbox and the engine, the axial arrangement and the type of incoming load. (radial or axial).
In general, the existing industrial gearboxes are divided into two categories: reducing and increasing gearboxes.
In reducer gearboxes, the output torque value is increased and the speed value is reduced. According to the reverse relationship between rotational speed and torque value, this model of gearboxes converts the rotational speed received from the input into torque and delivers it to the consumer.
Increaser gearboxes work the opposite of reducer gearboxes. In these gearboxes, the speed of the output rotation is increased and the amount of torque is reduced.
Centrifuges are one of the main uses of this model of gearboxes. This model of gearboxes can offer consumers a higher speed than the input mode.
For example, if the smaller gear rotates three times, and the larger gear rotates one time, this set is called a gearbox with a ratio of one to three, and in general, the ratio of a gearbox is obtained by dividing the number of revolutions of the gear and pinion, by the shaft. which rotates at a higher speed in the gearbox, this is called the put shaft or the input shaft, and the shaft that is responsible for power transmission and rotates at a lower speed is called the output shaft.
For example, if an industrial gearbox has two axes and the first axis has a ratio of one to three and the second axis has a ratio of one to four, the conversion ratio of the entire gearbox will be a factor of three and four, which will be 1 to 12.
That is, if the input shaft rotates 12 revolutions, the output shaft will rotate one revolution. In general, the power is equal to the torque multiplied by the speed. In fact, the higher the speed, the lower the torque, and the higher the torque, the lower the speed.
The torque in a gear is equal to the force multiplied by the torque arm. The torque arm is actually the distance from the center of the gear to the last point of the teeth, this means that if the torque arm is longer, the force required to turn the gearbox tooth will be greater.
According to the law of conservation of energy, if the torque and power in a gearbox are equal in the first gear, as a result, there will be power in the second gear and the speed will be lower, in other words, because the energy is constant, the input power must be equal to the output power.
In fact, the torque multiplied by the speed in the shaft must be the same as the torque multiplied by the speed in the output shaft, and because the output shaft has a lower speed, then the torque or output power will be higher in the industrial gearbox.
We will discuss more about the types of gears. The gears are either straight (they transmit power directly, which can be helical or simple) or they can be bull-helical, which transmits power at 90 degrees.
In fact, gearboxes are an integral part of the industry, and every industry with every field of activity will need gearboxes and gears.
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