Selection of Diaphragm Coupling and Its Application in Precision Machinery

　　Diaphragm coupling type selection guide

　　1. Each series of couplings has its own unique performance.When using, please select the appropriate coupling according to the specific requirements.

　　2. After selecting the appropriate series of products, refer to the corresponding parameter table and determine the model according to the corresponding parameters.

　　3. Confirm the appropriate fixing method and choose according to different needs.A reasonable fixing method is the guarantee of equipment stability.For more information, please refer to the "Combined Method of Consolidation" section.

　　4.Confirm that the selected product meets the requirements for on-site installation.

　　When disassembling, first mark the position between the pulley or joint and the shaft, tighten the factory to fix the screws and pins, and then slowly pull out with the pull wheel.If you can't pull it out, pour kerosene into the hole and pull it out again.If it still cannot be pulled out, you can quickly heat it around the pulley or coupling, wrap the shaft with a damp cloth, and continuously pour cold water to prevent heat from passing through the inside of the motor.

　　5. During the assembly process.First, use a fine iron emery cloth to sand the shaft hole of the shaft, pulley or coupling, align the pulley or coupling with the keyway on the shaft, use wrought iron or hardwood block to line the key end on one end of the key, and then lightly Tap the keyway.The key in the groove should be tight and moderate.Too tight or too loose will damage the key and groove, and too loose will cause the belt to slip or vibrate.

　　After selecting the coupling, the coupling should be installed and the position of the coupling should be adjusted correctly so that the coupling can achieve a good alignment.The life of the coupling can be extended as much as possible.

　　Couplings are increasingly used in precision machinery controlled by servo systems, such as machine tools and semiconductor system manufacturing machines.In these fields, different from general manufacturing machinery, couplings must require high-precision and stable connection, high-quality standards, especially in high-frequency forward and reverse, high-precision positioning and high-speed rotation of more than 20000 rpm.When used on a machine tool, in addition to the high rigidity required by the coupling, the coupling must also be able to withstand the high elastic fatigue limit of repeated torsional loads to adapt to high-speed operation.Therefore, the coupling must have high torque rigidity, zero rotation clearance and elastic body compensation manufacturing machinery.In the transmission process, the radial, axial, angular deviation, clockwise and counterclockwise rotation characteristics of the two shafts are equal. In the past, people only regarded the coupling as a mechanical part, but with the use of the mechanical coupling itself The diversification of the device, in order to obtain higher performance, the familiarity of the coupling comes from the simple mechanical parts that are transformed into important mechanical elements, which can play a role around the entire mechanical system.

　　Couplings are used in various host products.The surrounding working environment is complicated, such as temperature, humidity, water, steam, dust, sand, oil, acid, alkali, corrosive medium, salt water, radiation, etc.It is one of the important factors that must be considered when choosing a coupling.It is suitable for the working quality of high temperature, low temperature, oil, acid, alkali and other media.

　　Every time

　　The outer dimensions of the diaphragm coupling, that is, the larger radial and axial dimensions, are within the allowable installation space of machines and equipment.The selected coupling has convenient disassembly and assembly, maintenance-free, long maintenance period or easy maintenance, no need to move two axles, and easy adjustment.

　　According to the large outer edge size of the allowable linear speed of different materials of the diaphragm coupling, the allowable speed range of the diaphragm coupling is determined by calculation.Different materials and different varieties, the allowable speed range of the coupling is different.Changing the material of the coupling can increase the allowable speed range of the coupling.The allowable speed of steel is greater than that of cast iron.

　　Because it is difficult for large mechanical equipment to adjust the alignment of the two shafts, it is necessary to choose a durable and easy-to-replace coupling.The service life of a diaphragm coupling with a metal elastic element is generally longer than that of a diaphragm coupling with a non-metal elastic element.The need for sealed lubrication and the use of unsustainable couplings will inevitably increase the maintenance workload.For the long-term continuous operation and high economic benefits of the rolling mill transmission system of my country's metallurgical enterprises, the currently widely used upper gear coupling, although theoretically the transmission torque of the coupling is large, but in the case of good lubrication and sealing, The sealing condition needs to be checked frequently.Injecting lubricating oil, the maintenance workload is large, the auxiliary working hours are increased, and the effective working time is shortened, which affects the production efficiency.

　　In the operation of the coupling, these aspects must be paid attention to.No matter which aspect is important, it cannot be ignored.