Reducer drive and belt drive are the two commonly used transmission methods for grinding mill. What is the difference between these two transmission modes? When customers choose a grinding mill, how should they choose a transmission mode for the grinding mill?

 

 

The reducer is an independent component composed of gear transmission, worm transmission, and gear-worm transmission enclosed in a rigid shell. It is often used as a reduction transmission device between the original moving part and the working machine. It plays a role in matching the speed and transmitting torque between the prime mover and the working machine or the actuator. It is widely used in modern machinery.

 

 

 

1. Reduce the effect of rotating speed. Reducer, as the name suggests, the preferred function is deceleration. The main object of deceleration is the motor. Whether it is a servo motor or a stepper motor, it has the same effect, because in many practical applications of the motor, it is difficult for us to fully use the motor. Because this involves many other functional requirements and matching principles, we will reduce the speed of the motor. It is a very common practice to reduce the speed of the motor through a reducer.

 

2. Increase the torque effect. The reducer can also increase the output torque of the motor correspondingly while decelerating.

 

3. Reduce the inertia of the motion mechanism. Anyone who researches and develops mechanical structures knows that the motion inertia of the equipment is a very annoying thing. If the inertia of a certain motion mechanism is not well matched, the stability, accuracy and life of the motion will be greatly affected, but it cannot In order to match the inertia infinitely to increase the choice of the motor, so this time the reducer has done its work.

 

4. Locking mechanism, the reducer also has a very important function, that is, the locking mechanism, such as the worm gear reducer, this kind of reducer has a self-locking function, when its reduction ratio reaches a fixed ratio, It can almost completely shield the reverse impact of the movement mechanism on the motor, and even completely lock the movement of the entire mechanism.

 

5. Reduce the production cost of the product. Because the reducer has the function of reducing the speed and increasing the torque, we can often make it into a "small horse-drawn cart" transmission form, using a small power motor to achieve greater torque output , So as to achieve the effect of saving costs, but when using this way, you must pay attention to the balance of the two parameters, that is, the balance of torque and speed. Large torque, especially in the non-standard automation industry, many truss manipulators adopt this structure, and the balance of speed and torque is very important.

 

6. Optimize the mechanical structure design. In many cases, because of the use of the reducer, we can choose a motor with a lower power, thus simplifying our entire product design structure, so that many functional components can be made more refined and compact, and avoid looking " Stupid and clumsy", this is also one of the reasons why mechanical design engineers are willing to choose to use reducers.

 

 

 

 

Belt drive is a mechanical drive that relies on friction to transmit movement and power.

 

The belt drive uses a tensioned (annular) belt, which is sheathed on the pulleys of the two drive shafts. It relies on the friction force generated when the belt and the pulley are tensioned to transmit the power of one shaft to the other shaft. Belt rotation can be used for large-distance transmission between two shafts (working machine and power machine). Due to the elasticity of the belt, it can alleviate the impact and reduce the vibration, and the transmission is stable, but it cannot maintain a strict transmission ratio (the ratio of the number of revolutions per minute of the driving wheel to the number of revolutions per minute of the driven wheel). When the transmission part encounters obstacles or overload, the belt will slip on the pulley, so it can prevent the damage of the mechanical part. The belt drive is simple, easy to operate, low cost, easy to maintain, and easy to disassemble and replace. However, because the belt slips on the pulley, the mechanical efficiency of the belt drive is low, and the durability of the belt itself is also poor, and it will gradually extend after a long time, so it should be adjusted at any time.

 

 

 

Belt drive is widely used in machinery. Compared with meshing drive (gear, worm gear drive), belt drive has the following characteristics:

1. Simple structure, low manufacturing cost, convenient installation and maintenance.

2. The belt is full of elasticity, which can alleviate shock and vibration, so it runs smoothly and has low noise during work.

3. It is suitable for transmission with larger center distance, but on the other hand, the transmission profile is large in size and poor in compactness.

4. The elastic sliding of the belt on the pulley changes with the load, so the transmission ratio is not accurate. However, when overloaded, slipping can occur. Therefore, damage to other transmission parts can be prevented. But it is usually not used as an overload protection device.

5. The belt must be tensioned so that the shaft and bearings are subject to greater force.

6. Belts and pulleys will rub and generate heat and electrify, so they are not suitable for use in places where there is a danger of explosion.

7. The efficiency and durability of the belt drive are low. Compared with the flat belt drive, the V-belt has the advantages of larger transmission ratio i, smaller center distance A, compact transmission profile, and smaller belt sliding and tension.

 

Because the belt drive works by friction, it can effectively alleviate the impact of the load and run smoothly and without noise. The manufacturing and installation accuracy is not as strict as the meshing transmission requirements; it is similar to the friction wheel transmission during work, which will cause the belt to slip when overloaded, so it can prevent damage to other parts and increase the belt length within a reasonable range to adapt to a large center distance Working conditions (center distance can be up to 15 meters).

 

 

1. There is elastic sliding and skidding, which reduces the efficiency and cannot maintain an accurate transmission ratio;

2. When the same large circumferential force is transmitted, the profile size and the pressure on the shaft are larger than the meshing transmission force;

3. The life span of the belt is relatively short, generally only 2000-3000 hours.

 

Belt drive fault handling: The main fault of the belt drive is slipping. The reasons for the slipping are: the belt is too loose, the belt or pulley has oil stains, the belt is worn or stretched seriously. When the belt is too loose, readjust it according to the tightness requirement in the manual. If the belt or pulley is slipping due to oil stains, the oil stains should be removed in time. If the belt is severely worn or elongated, the belt should be replaced with a new one.

 

 

 

Generally, for the stability of the equipment, CLIRIK's HGM series ultra-fine powder grinding mills are mostly driven by a reducer, but if you have special requirements, we can also configure a belt drive according to your needs.

 

 

1. The cost of belt transmission is lower than that of reducer, if the budget is limited, you can consider this

2. Reducer transmission is more stable than belt transmission, and does not require frequent belt replacement

3. The transmission efficiency of the reducer is higher than that of the belt transmission.

4. The reducer has relatively high requirements for equipment maintenance, and it is necessary to add lubricating oil frequently.

 

Hope the above analysis is helpful to you.

Shanghai Clirik Machinery Co.,Ltd. specializes in the production of various grinding equipment: coarse grinding, Raymond grinding, high-pressure grinding mill, superfine grinding, vertical grinding, etc., suitable for ore grinding powder from 30 mesh to 3000 mesh. Processable materials include limestone, dolomite, barite, gypsum, talc, quartz, feldspar, glass, etc. hundreds of materials.

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