The expansion sleeve is a keyless connection device. Its principle and purpose are to generate a huge tightening force between the inner ring and the shaft, between the outer ring and the hub through the action of high-strength tension bolts, so as to realize the mechanical parts and the shaft. keyless join. When under load, torque, axial force or the combined load of the two is transmitted by the combined pressure of the expansion sleeve, the machine parts and the shaft and the accompanying frictional force. The expansion sleeve connection mainly has the following advantages: high alignment accuracy; easy installation/adjustment/disassembly; high strength, stable and reliable connection; can protect the equipment from damage when overloaded, especially suitable for transmitting heavy loads. Widely used in heavy machinery, wind power generation, packaging machinery, printing machinery, CNC machine tools, automation equipment and other fields.

The layout is generally simple, the manufacturing is simple, and the instantaneous speed of the two shafts is the same. There are mainly flange expansion sleeves, sleeve expansion sleeves, jacket expansion sleeves, etc. The movable expansion sleeves are mainly used for two shafts with deflection or Where there is relative displacement in the operation, it can be divided into rigid removable expansion sleeves and elastic removable expansion sleeves according to the method of compensation for displacement. The dynamic connection has the degree of activity in one direction or several directions to compensate, such as tooth indent expansion sleeves, cross groove expansion sleeves, universal expansion sleeves, gear expansion sleeves, chain expansion sleeves, etc., elastic removable expansion sleeves The elastic deformation of the elastic element is used to compensate the deflection and displacement of the two axes, and the elastic element also has the functions of buffering and vibration reduction.

Such as serpentine spring expansion sleeve radial multi-layer plate spring expansion sleeve elastic ring bolt pin expansion sleeve nylon bolt pin expansion sleeve rubber sleeve expansion sleeve, etc. Some expansion sleeves have been standardized, and universal expansion sleeves are selected At this time, the appropriate type should be selected according to the work requirements, and then the torque and speed should be calculated according to the diameter of the shaft, and then the applicable type should be found from the relevant manuals, and finally some key parts should be checked.

Easy installation/adjustment/disassembly; high strength, stable and reliable combination; can protect equipment from damage when overloaded, especially suitable for transmitting heavy loads, widely used in heavy machinery, light industrial machinery, food machinery, packaging machinery, textile machinery , printing machinery, CNC machine tools, automation equipment and other fields (heavy machinery holding the shaft).

The use and combined advantages of the expansion sleeve: when receiving a load, the torque, axial force or the combined load of the two is transmitted by the combined pressure of the expansion sleeve and the machine parts and shaft and the accompanying frictional force. Expansion joint sleeve, keyless bearing, etc.) is a keyless joint device. Its principle and use are that through the action of high-strength tension bolts, a huge holding force occurs between the inner ring and the shaft, and between the outer ring and the hub. , in order to realize the keyless combination of the machine and the shaft.

Evenly coat a thin layer of lubricating oil (without molybdenum disulfide additive) on the surface of the cleaned expansion sleeve. The combination surface must be clean, free of dirt, corrosion and damage. The joint is pushed onto the shaft to reach the position specified in the plan, and the expansion sleeve of the loosened screw is smoothly inserted into the joint hole of the transmission drum shaft and the cast-welded hub.

To avoid the skew of the joint, then tighten the screw, tighten the screw of the expansion sleeve, use a torque wrench, and evenly tighten the expansion sleeve according to the principle of diagonal and cross, and the tightening torque MA value of the screw is according to the technical parameters. After the protection and installation of the expansion sleeve is completed, apply a layer of anti-rust grease on the exposed end face of the expansion sleeve and the head of the screw. Machines operating in the open air or operating in poor environments should be Regularly apply anti-rust grease on the exposed end face of the expansion sleeve. The expansion sleeve that needs to work in a corrosive medium should take special protection (such as cover plate, sealing cover, etc.) to prevent the expansion sleeve from rusting.