What Is a Machine Pulley?

Pulleys, which belong to disc hubs, are generally relatively large in size, and are generally manufactured by casting and forging. Generally, the larger size design uses the casting method. The material is generally cast iron (the casting performance is better), and the cast steel is rarely used (the casting performance of steel is not good). Generally, the smaller size can be designed as forging. For steel. Pulleys are mainly used for transmitting power over long distances, such as the output of small diesel engines, agricultural vehicles, tractors, automobiles, mining machinery, machining equipment, textile machinery, packaging machinery, lathes, forging machines, and some small horsepower motorcycles. Transmission, power transmission of agricultural machinery, air compressor, reducer, reducer, generator, gin, etc.

Pulleys, which belong to disc hubs, are generally relatively large in size, and are generally manufactured by casting and forging. Generally, the larger size design uses the casting method. The material is generally cast iron (the casting performance is better), and the cast steel is rarely used (the casting performance of steel is not good). Generally, the smaller size can be designed as forging. For steel. Pulleys are mainly used for transmitting power over long distances, such as the output of small diesel engines, agricultural vehicles, tractors, automobiles, mining machinery, machining equipment, textile machinery, packaging machinery, lathes, forging machines, and some small horsepower motorcycles. Transmission, power transmission of agricultural machinery, air compressor, reducer, reducer, generator, gin, etc.

The advantages of the pulley transmission are: the pulley transmission can reduce the load impact; the pulley transmission runs smoothly, 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 transmission is not as strict as the meshing transmission; It has the function of overload protection; the adjustment range of the center distance between the two shafts of the belt drive is large. The disadvantages of 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 drive transmits the same large circumferential force, the contour size and the pressure on the shaft are greater than the meshing drive; Has a shorter life. The diameter and other dimensions of the pulleys of various types of machinery and equipment are all their own

1. The material of the fan for the fan is gray cast iron HT200, HT250, etc. (but steel, copper, aluminum, etc. can also be used according to customer requirements).

2. The pulley should meet the requirements: light weight, uniform mass distribution, elimination of internal stress generated during manufacturing, and the pulley should be corrected for static balance.

The specifications of the V-belt are divided by the size of the back width (top width) and height (thickness). According to different sizes of the back width (top width) and height (thickness), national standards stipulate

V-belt models are: ordinary OABCDE 3V 5V 8V, ordinary reinforced AX BX CX DX EX 3VX 5VX 8VX, narrow V-band SPZ SPA SPB SPC, strong narrow V-band XPA XPB XPC; each model of the V-belt specifies the triangle The cross-sectional size of the belt, the cross-sectional size of the A-type V-belt is: the top width is 13mm, and the thickness is 8mm;

1. Check the groove of the pulley to ensure that there are no scars or sharp edges, and all dimensions meet the standards;

2. Clean the surface of all parts, such as hub holes, taper sleeves, screw holes, etc. Fit the cone into the pulley so that all the screw holes are aligned.

3. Lubricate the screw (TB 1008-TB 3030) and thread (TB 3525-TB 5050) into the mounting holes, but do not tighten them temporarily.

4. Clean the surface of the drive shaft, push the belt pulley with the tapered sleeve to the predetermined position on the shaft, and check whether the triangle belt pulley is aligned.

5. When using a keyway, it must first be inserted into the shaft hub. There must be a certain tolerance between the keyway and the hole hub.

6. Using a hexagon wrench according to DIN911, tighten the bolts in each mounting hole gradually and evenly until the torque shown in the table below is reached.

7. After a short period of operation (0.5 to 1 hour), check the tightening torque of the bolts and re-tighten if necessary.

8. To prevent foreign matter from entering, fill the connection holes of the holes with grease.

1. Loosen all bolts, take out one or two bolts according to the number of disassembly holes, lubricate the bolt pattern and bolt tip with oil, and insert the bolts into the disassembly holes.

2. Tighten the bolts alternately until the taper sleeve and the pulley are loosened.

3. Take out the cone sleeve and pulley from the shaft.

1. For the last cleaning before assembly, gasoline must be used to ensure that all parts are clean and dry, to ensure that the mating surfaces are tightly fitted without oil, and have sufficient friction.
2. Hexagon bolts used for assembly should also be washed and dried with gasoline before assembly. Do not apply lubricating oil or grease to bolts or screw holes to ensure sufficient friction and self-locking ability after bolts are tightened.
3. When the three hexagon socket bolts are about to be installed, they need to be tightened in turn to ensure that the tapered sleeve receives uniform axial force, and that the coaxial positioning of the pulley and the tapered sleeve is good.
4. Check and measure the length of the hexagon socket bolts for assembly before installation to ensure that the assembly bolts can bear against the bottom end of the blind hole of the tapered sleeve after tightening, to ensure that the tapered surface fits tightly, and to ensure that the bolts are subjected to the reverse thrust of the bottom end of the blind hole. The double nut principle has the same anti-loosening effect.
5. After the pulley is tightened, check the wire and adjust the relative positions of the master and driven pulleys to ensure that the two wheels are on the same plane and the belt is properly tensioned.
6. The pulley cover should be intact and securely installed to ensure that a broken belt or a loose pulley exits during operation to cause a major safety accident.

7. The taper sleeve is a wearing part. After a long period of operation, the inner hole and the chain groove may be damaged. It should be inspected before each assembly. If any defects are found, the spare parts should be replaced in time.