What is the calculation method of pulley, what is the formula for calculating pulley speed?

For example, the speed of the motor is 1440 rpm, and if you want to make it smaller to 220 rpm, the method is as follows: 1440 * small pulley diameter = 220 * large pulley diameter. Just solve this equation and you're good to go.

The speed of the pulley is calculated, and then for example, the diameter of the main pulley is 300mm, the speed is 2000 rpm, the speed of the pulley is 800 rpm, and the diameter of the pulley is calculated, and the conversion method: 300 times 2000 and then divided by 800 is the diameter sought. In fact, strictly speaking, it is necessary to convert it into circumference, that is, multiply it first, and then divide it, but here it is just simplified, and the result obtained is correct.

When the diameter of the driven wheel is 310 mm, the speed requirement is 900 rpm, and the diameter of the pulley on the motor at 1460 rpm should be: 310 * 900 1460 = 191 mm; How to calculate the linear velocity of the pulley How to calculate the diameter of the pulley The formula is as follows: a b * a = b driving wheel speed is:

A driving wheel diameter is: a passive wheel speed: b driven wheel diameter is:

b wheel diameter motor speed x motor pulley diameter turbine pulley diameter deceleration speed ratio = saw blade speed; Wheel diameter: motor speed x motor pulley diameter Saw blade speed Deceleration speed ratio = turbine pulley diameter; Linear speed (wheel diameter, motor speed, worm gear pulley diameter, reducer speed ratio) = motor pulley diameter.

The pulley ratio is calculated in this way.

Let the diameter and speed of the motor pulley (driving wheel) be d1, n1, and the diameter of the driven wheel, the speed d2, n2, and the pulley speed calculation formula can be obtained by the mechanical transmission principle: d2 d1=n1 n2=i; i.e. d2 = d1 * (n1 n2). Now we assume that the motor speed is 1440 rpm, the diameter of the motor pulley is 200, and the driven wheel requires the speed to be 760 rpm, then the diameter of the driven wheel is the size of the value into the formula:

d2=200*(1440/760)≈。Depending on the diameter, it is inversely proportional to the rotational speed, and at the same time the rotational speed slip loss is possible for the belt drive. The selection of the actual driven wheel can be confirmed as follows:

Need the driven wheel to rotate faster, then the diameter of the driven wheel can be smaller than the calculated value, the diameter of the driven wheel can be considered to be 370mm, otherwise the value can be larger, such as the diameter of the driven wheel can be taken as 380mm.

Hope it helps.

The formula for calculating the speed of the pulley is as follows: the diameter and speed of the motor pulley (driving pulley) are d1, n1, and the diameter and speed of the driven pulley are d2 and n2, and the pulley speed calculation formula can be obtained by the mechanical transmission principle: d2 d1=n1 n2=i; i.e. d2 = d1 * (n1 n2).

The national standard stipulates that the model of the V-belt has O, A, B, C, D, E, F seven models, and the corresponding pulley groove angle has three °, and the minimum diameter of the small pulley corresponding to each type of V-belt corresponding to each wheel groove angle is specified at the same time, and the large pulley is not specified.

Belt Specifications:

The specifications of the V-belt are divided by the size of the back width (top width) and height (thickness), according to the size of different back width (top width) and height (thickness), the national standard stipulates the O, A, B, C, D, E and other models of the V-belt, and the section width, top width and height of each type of V-belt are different.

Therefore, the pulley must also make various grooves according to the shape of the V-belt; These different geometries determine the O-type pulleys, A-type pulleys, B-type pulleys, C-type pulleys, D-type pulleys, E-type pulleys and other models of pulleys.

Motor pulley speed calculation:

First, because the distance of the line traveled by the main and driven wheels is equal. The distance of the line traveled by the motor per minute is: 1440*20*cm) The circumference required to walk 90432 cm per minute 760 rpm is:

90432 760 119 (cm) corresponds to a wheel diameter of 119 cm).

2. If the motor speed is 980 rpm, the diameter of the motor pulley is 210, the diameter of the driven pulley is 230, and the diameter of the motor pulley is changed to how much? to reach 850 rpm. The formula is:

d2 = n1 * d1 n2 = 1 440 * 20 760 cm 980 850 = 230 x x = 200 without considering the 5% slip factor, 200 can be taken The easiest way is to change the motor wheel 210 to 200. Because the speed ratio n=980 850=motor speed, actual speed) Now the speed ratio n1=230 210= insufficient need If you change to 230 wheels, it will be scrapped and redone (the size should be increased) is unreasonable. Only change the motor in the wheel

230 Considering the slippage loss of the belt, take 200 diameters.

3. If the motor speed is 1460, the belt is meters long, the driven wheel is 310 mm, and the speed of the driven wheel is 900 rpm, how big is the motor pulley if the driven wheel is reduced to 900 rpm? When the diameter of the driven wheel is 310 mm, the speed requirement is 900 rpm, and the diameter of the pulley on the motor at 1460 rpm should be: 310 * 900 1460 = 191 mm; Because the two wheels theoretically have the same speed on the outer circle, it has nothing to do with the length of the belt.

155 85 = revolutions per minute.

137 77 = revolutions per minute.

revolutions per minute.

The first one revs faster, faster than the second one per minute.

Small pulley (driven pulley) with a diameter of 85mm speed = 2900x155 85 = 5288 (revolutions).

Small pulley (driven pulley) with a diameter of 77mm speed = 2900x137 77 = 5160 (revolutions).

You can see which of them is faster.

Generally, the relationship between each other is calculated according to the speed of the driving wheel * the diameter of the driving wheel = the speed of the driven wheel * the diameter of the driven wheel, therefore, the diameter of the driving wheel in the problem is 3200 * r = 1000 * 230

Therefore, r=, considering the belt slippage and other factors, the diameter of the driving wheel should be increased a little more, and the number of increases is related to the type of belt and load (transmission power), and the diameter of 75mm can be considered;

However, the small diameter belt rate is easy to slip, causing the transmission power to decrease, you can consider increasing its diameter appropriately, that is, increasing the diameter of the driving wheel, and increasing the diameter of the driven wheel at the same time, and the calculation formula is still calculated as above after the change.

Pulley speed ratio.

It can be calculated according to the principle of mechanical transmission, and its formula is driven wheel diameter = pulley diameter * (pulley speed driven pulley speed).

Assuming that the diameter of the motor pulley, that is, the driving wheel is d1 and the speed is n1, and the diameter of the driven wheel is d2 and the speed is n2, according to the principle of mechanical transmission, the calculation formula of the pulley speed is d2 d1 = n1 n2 = i, in other words, the diameter of the driven pulley = the diameter of the pulley * (the speed of the pulley driven pulley speed). Assuming that the motor speed is 1440 revolutions per minute, the diameter of the motor pulley is 200, and the speed of the driven wheel is 760 revolutions per minute, the diameter of the driven wheel is 200 * (1440 760), which is approximately equal to. In general, the diameter is inversely proportional to the rotational speed.

That is to say, if the diameter is large, the rotational speed will be small, and if the diameter is small, the rotational speed will be large.

The diameter of the big wheel * the speed of the big wheel = the diameter of the small wheel * the speed of the small wheel, the distance traveled by the two is equal

The current speed of the big wheel: 274*1200 315

After changing the speed, the diameter of the small wheel is d: d*1300=(274*1200 315)*315

d = the diameter of the small wheel becomes.

Transmission advantages: The advantages of pulley transmission are: pulley transmission can alleviate load impact; The pulley transmission runs smoothly, with low noise and low vibration; The structure of the pulley transmission is simple and easy to adjust; The manufacturing and installation accuracy of the pulley drive is not as strict as that of the meshing drive; The pulley drive has the function of overload protection; The center distance between the two axes of the pulley drive has a large adjustment range.

The diameter of the big wheel * the speed of the big wheel = the diameter of the small wheel * the speed of the small wheel, the distance traveled by the two is equal, the current speed of the big wheel: 274 * 1200 315 After changing the speed, the diameter of the small wheel is d: d * 1300 = (274 * 1200 315) * 315d = the diameter of the small wheel becomes.

Summary. The pulley speed ratio can be calculated according to the principle of mechanical transmission, and its formula is driven pulley diameter = pulley diameter * (pulley speed driven pulley speed).

Hello dear, the pulley speed calculation formula is d2 d1=n1 n2=i. Let the diameter of the pulley of the motor be guessed and the speed is d1 and n1, and the diameter of the driven wheel and the speed d2 and n2 can be obtained from the principle of mechanical transmission: d2 d1=n1 n2=i; i.e. d2 = d1 * (n1 n2).

How to calculate the speed ratio of pulleys.

The speed ratio of the pulley can be calculated according to the principle of mechanical transmission, and the formula is the missing diameter in the driven Tongnian wheel = the diameter of the pulley * (the speed of the pulley driven pulley).

The rotational speed of the pulley can be calculated using the following formula: rotational speed (rpm) = linear velocity (m s) Pulley circumference (m) In this formula, the linear velocity is the speed at which an object or material moves along the length of the pulley, and the perimeter of the pulley is the distance around the outer edge of the pulley. For example, if the linear velocity of the belt is 2 meters per second and the circumference of the pulley is meters, then the rotational speed of the pulley width is:

Rotational speed (rpm) = 2 m s m = 4 rpm In order to accurately calculate the rotational speed, the linear velocity and the circumference of the pulley must be accurately measured and the correct units used. In some cases, it may also be necessary to consider the grooves or number of teeth on the pulley, as well as the size and type of belt, to accurately calculate the rotational speed. This is especially important in applications where pulleys are used to transfer torque or power from one shaft to another.