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How to reduce motor speed with pulleys

How to reduce motor speed with pulleys

Pulleys, which are part of the hub type, generally have relatively large relative sizes. The manufacturing process is generally based on casting and forging. How to reduce motor speed with pulleys. (The general size design is made by casting. The materials are generally cast iron (good casting performance), very Less cast steel (steel casting performance is not good); and generally smaller size, can be designed for forging, the material is steel). Pulleys are mainly used for remote power transmission, such as the output of small diesel engines, agricultural vehicles, tractors, automobiles, mining machinery, machining equipment, textile machinery, packaging machinery, lathes, forging beds, some small horsepower motorcycles. Transmission, transmission of agricultural machinery power, air compressors, reducers, reducers, generators, gins, etc. It is worth noting that the last cleaning before the assembly of the pulley must use gasoline to ensure that the parts are clean and dry to ensure that the mating surface is tight and oil-free, with sufficient friction.

How to reduce motor speed with pulleys

How to reduce motor speed with pulleys. The speed of the motor is multiplied by the diameter of the motor pulley, divided by the diameter of the machine pulley, equal to the speed of the machine.


Advantages of motor pulley drive
1. The pulley drive can mitigate the load impact;
2. The pulley drive runs smoothly, with low noise and low vibration; the structure of the pulley drive is simple and easy to adjust;
3, the pulley drive for the manufacture and installation accuracy of the pulley is not as strict as the mesh drive;
4, the pulley drive has the function of overload protection;
5. The adjustment range of the two-axis center distance of the pulley drive is large.

How to reduce motor speed with pulleys

1 selection principle
How to reduce motor speed with pulleys. The selection of the various indicators and materials of the pulley is based on the principle that the raw materials can be reduced, the process is feasible, and the cost is the lowest.

2 transmission advantages

The advantages of the pulley drive are: the pulley drive can alleviate the load impact;How to reduce motor speed with pulleys. the pulley drive runs smoothly, low noise and low vibration; the pulley drive has a simple structure and convenient adjustment; the pulley drive has strict manufacturing and installation accuracy for the pulley; the pulley drive It has the function of overload protection; the two-axis center distance adjustment range of the pulley drive is large.How to reduce motor speed with pulleys.  The disadvantages of the belt drive are: the pulley drive has elastic sliding and slipping, the transmission efficiency is low and the accurate transmission ratio cannot be maintained; when the pulley transmission transmits the same large circumferential force, the contour size and the on-shaft pressure are larger than the meshing transmission; How to reduce motor speed with pulleys. the pulley drive belt The life span is short. The diameters of the pulleys of all kinds of mechanical equipment are all based on the reduction ratio, and are designed according to the working speed and the speed of the motor. Working speed / motor speed = drive wheel diameter / driven wheel diameter * 0.98 (sliding coefficient), such as the use of steel as the material of the pulley, the required line speed is not higher than 40m / s, such as the use of cast iron materials, the required line speed is not higher than 35m / s, motor speed and pulley diameter conversion ratio, speed ratio = output speed: input speed = load pulley pitch diameter: motor pulley pitch diameter. The diameter of the pitch circle is the same as the diameter of the reference circle. The diameter is -2h = the pitch diameter. h is the groove depth on the reference line.

How to reduce motor speed with pulleys

How to reduce motor speed with pulleys. The V-band h of different models is different. YZABCDE, the groove depth on the reference line is h=1.622. 753.54.88.19.6. The diameter of the pulley pitch circle is the theoretical diameter of the pulley pitch line position, which is somewhat like the indexing circle diameter of the gear. It is generally indicated by PD, and the outer circle is generally represented by OD. Different groove type pitch circles are not the same as the outer circle conversion formula. How to reduce motor speed with pulleys. Generally, we It is easier to measure the outer circle of the pulley, and calculate the pitch circle according to the formula. SPZ: OD = PD + 4; SPA: OD = PD + 5.5; SPB: OD = PD + 7; SPC: OD = PD + 9.6. The minimum outer diameter of the pulley of A or SPA is 80mm. If it is smaller than this size, especially in the case of high speed, the belt is prone to delamination and cracks at the bottom.How to reduce motor speed with pulleys. SPZ belt, the small wheel can be no less than 63mm. At the same time, pay attention to the method and tension of the belt installation. If it is too small, it will slip easily. If it is too large, it will damage the belt and the bearing.

3 production requirements
1. The material used for the ventilator is gray cast iron HT200, HT250, etc.How to reduce motor speed with pulleys. (but steel parts, copper parts, aluminum parts, etc. can also be used according to customer requirements).

2. The pulley should meet: light weight, uniform mass distribution, eliminate internal stress generated during manufacturing, and the pulley should be statically corrected.

How to reduce motor speed with pulleys

4 belt specifications
The specifications of the V-belt are divided by the width of the back (top width) and the height (thickness).How to reduce motor speed with pulleys. According to the different back width (top width) and height (thickness), the national standard specifies the O, A of the V-belt. , B, C, D, E and other models, each model of the V-belt has different width, top width and height, so the pulley must also be made according to the shape of the V-belt; The groove type determines the various types of pulleys such as O-belt pulley, A-belt pulley, B-belt pulley, C-belt pulley, D-belt pulley and E-belt pulley.

With Best Regards,
 
Lee ( Sales Department; Miss. )         
NER GROUP CO.,LIMITED    
Yantai Bonway Manufacturer Co., Ltd                        
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