1. Feed machinery equipment accessories crusher rotor product introduction
In the process of feed production, the crusher is the key equipment for crushing various raw materials, and the crusher rotor is one of the core components of the crusher. Its performance directly affects the crushing efficiency, crushing particle size and the stability and reliability of the entire crusher.
2. Structure composition
Principal axis
The spindle is the core supporting part of the grinder rotor, which undertakes the important task of transmitting torque and supporting other components. Spindle is usually made of high-quality alloy steel, such as 40Cr, 42CrMo, etc., these materials have high strength, toughness and fatigue resistance. The shape of the spindle is generally cylindrical, and its diameter and length depend on the type and power of the mill. A key way is provided on the spindle for connecting with other components (such as hammer, disc, etc.) to achieve power transmission. In order to ensure the stability of the spindle when rotating at high speed, its two ends are usually installed with high-precision bearings, and the design should take into account the dynamic balance problem to avoid violent vibration due to imbalance.
Hammer (or other crushing element)
The hammer is a common crushing element that is mounted on the spindle and rotates with the spindle at high speed. The shape, size and material of the hammer have a key influence on the crushing effect. The hammer is generally rectangular, and one end is provided with a mounting hole, which is connected with the spindle through a key, and the other end is a free end, which is used for hitting and crushing feed raw materials. The material of the hammer is usually made of alloy steel with high hardness and toughness, such as 65Mn, 50CrV, etc., and the surface will be treated with special treatment, such as heat treatment to improve hardness, shot peening treatment to improve surface strength and wear resistance. In some special shredders, other types of crushing components may be used, such as toothed claws, flying knives, etc., whose structure and working principle are different from the hammer, but the same is to achieve effective crushing of feed raw materials.
disk
The disc is used to hold the position of the hammer or other crushing elements so that they are evenly distributed on the spindle and maintain a certain spacing. The disc is generally made of cast iron or cast steel and has sufficient strength and stiffness. The disc is provided with mounting holes or slots for mounting the hammer or other crushing elements and is fastened to the spindle by connecting pieces such as nuts and washers. In some designs, a partition may also be installed between the discs to control the flow direction and residence time of the material in the crushing chamber to improve the crushing efficiency.
counterweight
Because the crusher rotor is rotating at high speed, if there is an imbalance, it will produce large vibration and noise, and even damage the equipment and affect production safety. Therefore, a balance block is usually installed on the rotor to allow for action balance correction. The position and weight of the balance block can be adjusted according to the unbalance of the rotor, and it is generally installed on the spindle or disk. Through accurate dynamic balance test and adjustment, the center of gravity of the rotor is made to coincide or close to coincide with the rotation axis, which ensures the stability of the rotor when rotating at high speed.
3. Material characteristics
Spindle material
As mentioned earlier, the spindle is commonly made of alloy steel such as 40Cr and 42CrMo. 40Cr alloy steel has good comprehensive mechanical properties, after quenching and tempering treatment, the hardness can reach HRC28-32, can withstand a certain torque and bending stress. 42CrMo alloy steel contains molybdenum element, further improve the hardenability and strength of the material, after tempering and surface quenching treatment, the surface hardness can be increased to HRC50-55, with better wear resistance and fatigue resistance, suitable for large, heavy duty crusher rotor spindle, can effectively cope with high load working conditions, Reduce the risk of shaft deformation and damage.
Hammer material
Hammer material 65Mn is a kind of high-quality carbon spring steel, with high strength and hardness, after quenching and tempering treatment, hardness up to HRC45-50, while maintaining a certain toughness, can withstand multiple impact loads and not easy to break. 50CrV alloy steel has a better overall performance, its strength, toughness and fatigue limits are higher, in the hammer frequently hit the material in the process of performance. In addition, some new hammer materials will also use surface coating technology, such as titanium nitride coating, tungsten carbide coating, etc., to further improve the surface hardness, wear resistance and corrosion resistance of the hammer, and extend the service life of the hammer.
Disc material
Cast iron disks (such as gray cast iron HT200, HT250) have good casting performance, shock absorption and wear resistance, relatively low cost, suitable for small and medium-sized crusher rotors. Cast steel disks (such as ZG230-450, ZG270-500) have higher strength and toughness, can withstand greater impact forces and loads, and are often used in large, heavy crusher rotors or occasions with higher disk strength requirements.
4. Performance characteristics
High speed and high kinetic energy
The crusher rotor can reach a higher speed under the drive of the motor, generally between 1000-3000 RPM, the specific speed depends on the model and use of the crusher. The high speed allows the hammer or other crushing element mounted on the rotor to have a high kinetic energy, which can produce a strong impact force and shear force when in contact with the feed raw material, thus effectively crushing the raw material into the desired particle size. For example, when crushing common feed raw materials such as corn and soybean meal, the high speed rotor can quickly break the raw material particles, improve the crushing efficiency, and meet the needs of large-scale feed production.
Good crushing effect
Due to its unique structure and high-speed rotation characteristics, the crusher rotor can achieve a good crushing effect on feed raw materials. The hammer or other crushing elements strike, impact and shear the raw materials from different angles during the rotation process, so that the raw materials undergo multiple crushing processes in the crushing chamber, and finally form uniform fine particles. By adjusting the number of hammer pieces, shape, installation Angle and rotor speed and other parameters, the size and uniformity of grinding particle size can be controlled to meet the different requirements of different animals for feed particle size. For example, for the feed of young animals, finer grinding particle size is needed, which can be achieved by increasing the number of hammer pieces and increasing the rotor speed. For the feed of adult animals, the grain size requirements can be appropriately relaxed to increase the grinding yield.
Stability and reliability
High quality material selection, reasonable structure design and superb manufacturing process make the crusher rotor have high stability and reliability. The high strength and good dynamic balancing performance of the spindle ensure the smooth operation of the rotor at high speed, and reduce the generation of vibration and noise. The robust installation and durable material of parts such as hammer and disc make it able to withstand long-term, high-intensity crushing work, and is not easy to loosen, deformation or damage. Stable and reliable mill rotor can reduce the failure rate of equipment, improve the utilization rate of production equipment, reduce the economic loss caused by equipment downtime, and ensure the continuity and stability of feed production.
Strong adaptability
The crusher rotor can adapt to the grinding needs of many different types of feed raw materials. Whether it is grain raw materials (such as corn, wheat, rice, etc.), bean raw materials (such as soybeans, peas, etc.), cake meal raw materials (such as soybean meal, cottonseed meal, rapeseed meal, etc.), or some fiber raw materials (such as hay, straw, etc.) and mineral raw materials, etc., can be adjusted by adjusting the working parameters of the grinder (such as rotor speed, feed speed, screen aperture, etc.). Effective pulverization is achieved by using the crusher rotor. This wide adaptability makes the crusher widely used in the feed production industry, and can meet the requirements of different feed formulations and production processes.
5. FAQ
Q: What is the main material of the crusher rotor?
A: Crusher rotors are usually made of high-strength steel or alloy steel to ensure that they have sufficient strength and wear resistance. These materials can withstand high loads and long periods of use.
Q: How to choose the right grinder rotor size?
A: Choosing the right size of the mill rotor needs to consider the power, speed and load of the equipment and other factors. Ensure that the selected size can meet the design requirements and conditions of use of the equipment.
Q: What are the surface treatment processes of the grinder rotor?
A: The common surface treatment process of the grinder rotor includes quenching, carburizing and nitriding. These processes can improve the hardness and wear resistance of the surface and extend the service life.
Q: How to ensure the transmission efficiency of the mill rotor?
A: In order to ensure the transmission efficiency of the grinder rotor, the coordination accuracy between the shaft and the rotor should be ensured, the lubrication system should be regularly checked and maintained, and the lubricating oil should be kept clean and appropriate.
Q: What problems may occur during the use of the mill rotor?
A: The grinder rotor may have problems such as wear, fracture, deformation or poor fit during use. These problems are usually caused by overload, inadequate lubrication, or material defects.
Q: What are the special requirements for grinder rotors in different application scenarios?
Answer: In different application scenarios, the crusher rotor may have different special requirements. For example, mill rotors used in high temperature environments need to have high temperature resistance; For use in corrosive environments, corrosion-resistant materials are required.
