1. Feed machinery and equipment accessories connected empty shaft product introduction
In the feed machinery and equipment, the connected empty shaft plays a crucial role, it is the key bridge connecting the various transmission parts and working parts, and has an irreplaceable role in ensuring the stable operation of the equipment, the accuracy of power transmission and the reliability of the overall performance.
2. Structural features
Shaft structure
The shaft body of the connected empty shaft is usually a hollow cylinder. This hollow design effectively reduces the weight of the shaft on the premise of ensuring the strength and stiffness of the shaft, which is conducive to the overall balance and energy-saving operation of the equipment. The diameter and length of the shaft vary according to the specific model of the feed machinery, the power and the requirements of the connected parts. In general, the diameter of the connected empty shaft of the large feed equipment is large to withstand greater torque and radial force, and the length is determined according to the layout and spacing between the components of the equipment to ensure that the key parts can be accurately connected, such as in the large feed mixer, the length of the connected empty shaft should be able to run through the entire mixing bin and transfer the power stably to the mixing blade. The surface of the shaft body usually has a high processing accuracy, requiring cylindricity, straightness and other indicators to meet strict standards to reduce vibration and unbalanced force during high-speed rotation and ensure the smooth operation of the equipment.
Joint site
The connected empty shaft has a plurality of connecting parts, and its two ends or specific positions are designed to connect with the motor, reducer, gear box and other power sources or transmission parts of the interface. These connecting parts are usually connected in the form of keyways, splines, flanges, etc. Keyway connection is a more common way, by processing the corresponding keyway on the shaft body and connecting parts, inserting flat keys or semicircular keys, to achieve torque transmission and axial positioning, this connection method is simple in structure, high reliability, suitable for general power and torque requirements of feed equipment. Spline connection has higher carrying capacity and accuracy, the mesh of spline teeth can make the shaft and the connecting parts more closely, transmit greater torque and uniform force, often used in large, heavy duty feed machinery, such as the spindle of the large feed granulator and the transmission gear box connection. Flange connection is mainly used in the need for frequent disassembly and installation of parts, the flange is fastened together by bolts, to achieve the connection of the shaft and other components, this connection is easy to maintain and overhaul, in some modular design of feed equipment is more common.
Internal structure
Because it is a conjoined empty axis, there may be some special structural design inside it. For example, in order to facilitate the installation and maintenance of internal drive elements or other attachments, some holes or mounting seats may be reserved in the shaft. In some feed equipment with lubrication system, the connected empty shaft may also have a lubricating oil passage inside, which is used to transport lubricating oil to various parts that need lubrication, such as bearings, gears, etc., to reduce friction and wear and extend the service life of the equipment. The design of these internal structures needs to be carried out under the premise of ensuring the strength and overall performance of the shaft, and taking into account the feasibility of the processing process and cost control.
3. Material characteristics
High quality carbon steel
High quality carbon steel such as No. 45 steel is one of the commonly used materials for connecting empty shafts. 45 steel has good comprehensive mechanical properties, and its strength and toughness can meet the requirements of most feed machinery and equipment. After proper heat treatment, such as tempering treatment, the hardness can reach HB217-255, which can resist wear and deformation to a certain extent. In some small feed shredders or mixers, the conjoined hollow shaft of No. 45 steel can operate stably, effectively transfer the power of the motor to the working parts, and maintain good performance during the service life of the equipment, without frequent replacement or maintenance.
Alloy steel
For large, heavy duty or feed machinery equipment with higher requirements for shaft performance, alloy steel jointed empty shaft is more suitable. For example, 40Cr alloy steel contains chromium, which can improve the hardenability and strength of the steel. After tempering and surface quenching treatment, the surface hardness can be significantly increased to HRC50-55, which makes the shaft have better wear resistance and fatigue resistance when subjected to huge torque and impact loads. In the main shaft (conjoined empty shaft) of the large feed granulator, the 40Cr alloy steel material can ensure that the shaft will not be deformed, broken or excessively worn under long-term, high-strength working conditions, ensuring the reliability of the equipment and the continuity of production. In addition, some special alloy steel such as 42CrMo, its comprehensive performance is more excellent, in high temperature, high pressure environment can still maintain good mechanical properties, suitable for some special process of feed production equipment, such as the key drive shaft of feed bulking machine.
Stainless steel
In the feed production environment, if there are wet, corrosive media or high health requirements, stainless steel connected hollow shaft is the ideal choice. For example, 304 stainless steel has good corrosion resistance and oxidation resistance, which can effectively prevent the water, acid and alkali components in the feed and the erosion of the shaft by microorganisms, and ensure the normal operation and service life of the shaft. In aquatic feed processing equipment or food grade feed production equipment, stainless steel jointed empty shaft can avoid equipment failure and feed contamination caused by corrosion of the shaft, ensuring product quality and quality.
4. Performance characteristics
High-precision power transmission
With its precise machining accuracy and reasonable connection structure, the connected empty shaft can realize high-precision power transmission. Whether it is connected with the motor, reducer, or with other transmission components such as gears, belts, power can be accurately transmitted to the working parts, to ensure that each part of the feed machinery and equipment in accordance with the predetermined parameters of the operation. For example, in the feed pelletizing machine, the connected empty shaft transmits the power from the motor to the pelletizing spindle stably, so that the ring die and the press roll can work together at precise speed and torque, ensuring that the feed particles produced are uniform in size, regular in shape and meet quality standards.
High carrying capacity
Because of the high quality material and reasonable structure design, the connected empty shaft has a strong bearing capacity. It can withstand large torque, radial force and axial force, in the operation of feed machinery and equipment, even in the face of complex stress situations, such as in the feed crusher, crushing material when the huge impact and uneven resistance, conjointed empty shaft can also stably support and transfer power, will not easily deformation, fracture or damage, Ensure the safe operation of the equipment and the continuity of production.
Good stability and balance
The hollow structure and high precision machining technology of the connected empty shaft make it have good stability and balance when rotating at high speed. The cylindricity, straightness of the shaft and the accuracy of the connection part ensure that the shaft will not produce excessive vibration and unbalanced force during the rotation process, and reduce the impact on other parts of the equipment, such as bearing wear and loose transmission parts. In the feed mixer, the stable and balanced conjoined empty shaft can make the mixing blade evenly stir the material, improve the mixing effect, reduce the noise and energy consumption of the equipment, and extend the service life of the equipment.
5. FAQ
Q: What is the main material of the empty shaft?
A: Conjoined hollow shafts 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: What are the surface treatment processes for conjoined empty shafts?
A: Common surface treatment processes for conjoined empty shafts include 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 connected empty shaft?
A: In order to ensure the transmission efficiency of the connected empty shaft, the coordination accuracy between the shaft and the accessories should be ensured, the lubrication system should be checked and maintained regularly, and the lubricating oil should be kept clean and appropriate.
Q: What problems may occur in the use of the conjoined empty shaft?
A: The conjoined empty shaft may suffer from wear, fracture, deformation or poor fit during use. These problems are usually caused by overload, inadequate lubrication, or material defects.
Q: What are the heat treatment processes of conjoined empty shafts?
A: The heat treatment process of the conjoined empty shaft includes quenching, tempering and normalizing. These processes can improve the mechanical properties of the material, increase its hardness and wear resistance, and thus extend the service life of the connected empty shaft.
