The selection of diaphragm coupling and the deviation of plum blossom coupling

　　Selection requirements for diaphragm

　　1. According to the requirements of mechanical characteristics, it is necessary to consider transmission torque, stiffness, vibration, impact, corrosion resistance, transmission accuracy and other characteristics.

　　2.The torque transmitted by the coupling is less than the allowable range of its design.The determination of peak torque should consider the acceleration and deceleration torque and overload torque required for machine braking.If the peak torque cannot be determined due to insufficient data or difficult design analysis, please refer to the torque calculation when selecting the coupling in detail.In other words, the calculation of torque does not exceed the allowable value of torque.

　　The structure and technical parameters of the double diaphragm coupling refer to the product center of this site.The plum blossom elastic coupling structure is simple, the number of zeros is small, the radial dimension is small, no lubrication is required, and the elastic element has a high load-bearing capacity.Except for the double-flange plum blossom elastic coupling, when replacing the fragile plum blossom elastic part, it is necessary to move the semi-coupling in the axial direction.Coupling can compensate for the relative deviation of the two axes.

　　Plum blossom elastic couplings Plum blossom petals are usually round in cross section, which can improve the uniformity of load distribution on the working surface, and can transmit larger torques, but the elasticity is slightly reduced.It can also be made into a rectangle or fan shape.When the coupling is working, the plum petals are squeezed, and only half of the plum petals carry the load. 1. The plum blossom elastic coupling can transmit torque and rotation angle, and absorb the safety deviation of the shaft.When the installation deviation exceeds the allowable value, it may cause vibration or shorten the service life of the coupling, so it is necessary to ensure the correct adjustment of the deviation.

　　3. Deviation not only occurs in the equipment assembly, but also caused by vibration, thermal expansion, bearing wear, etc. during the working process.Therefore, it is recommended to adjust the axial deviation to less than 1/3 of the value.

　　4. There are three kinds of shaft deviation, namely radial deviation, angular deviation and axial deviation.Adjust the deviation below the allowable value listed in the individual product specification sheet.

　　5.The allowable deviation of each product is when there is only one deviation, when two or more deviations exist at the same time, the allowable value should be less than 1/2 of the deviation in each specification table.

　　Plum-shaped elastomers generally use polyester polyurethane (hardness code a) or cast nylon (hardness code b), the former has a lower load-bearing capacity than the latter.

　　The semi-coupling and flange connection material is 45 steel or ZG70-500, which is used in the chemical industry.In order to prevent corrosion, phenolic resin is usually used for semi-coupling.Plum blossom elastic coupling torsion elasticity, vibration absorption, maintenance-free, compact design, low inertia.

　　Pay attention to the disassembly of the coupling: before dismantling the coupling, some marks must be made on the positions where the parts of the coupling fit each other for reference when reloading.For couplings used in high-speed machine tools, the connecting bolts are weighed, clearly marked, and no mistakes can be made. When disassembling the coupling, the coupling bolts are usually removed first.

　　Before disassembling the coupling, it is necessary to make some marks on the matching positions between the various parts of the coupling for reference during reassembly.The coupling is a high-speed machine. After the connecting bolts are weighed, the marks are clearly marked and there is no error.When removing the coupling, usually remove the connecting bolt first.As grease and corrosion products are deposited on the thread surface, the bolts are not easy to disassemble, especially the bolts with severe corrosion.For the removal of the connecting bolts, a suitable tool is selected, because the stress surface of the bolt's outer hexagon or inner hexagon has been slipped and damaged, so it is difficult to disassemble.For bolts that have been corroded or have a lot of grease stains, solvents (such as rust inhibitors) are usually used to spray the connection between the bolt and the nut, so that the solvent can penetrate into the thread, thereby facilitating disassembly.

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　　The above is about the content of coupling, I believe everyone has a certain understanding, we update a lot of its information every day, and like to collect our website.