Such
CouplingBecause of the elastic element, it can not only compensate the relative displacement between the two shafts, but also has the ability to buffer and reduce vibration.The more energy the elastic element can store, the stronger the cushioning capacity of the coupling; the greater the elastic hysteresis performance of the elastic element and the greater the friction work between the parts during elastic deformation, the better the vibration damping ability of the coupling.
1. Star-shaped elastic coupling. Both halves of the coupling are provided with protruding teeth. A star-shaped elastic piece made of rubber and other materials is placed between the protruding teeth of the two halves of the coupling.When working, the star-shaped elastic member is compressed and transmits torque.This kind of coupling allows the shaft to have a radial displacement of 0.2mm and a deflection angle of 1°30'.Because the elastic part is only compressed and not pulled, the working condition is improved, so the life span is longer.
2. The structure and working principle of the quincunx elastic coupling are similar to those of the star elastic coupling, but the hole of the half coupling and the shaft can be made into a cylindrical or conical shape, and the quincunx elastic piece is used instead of the star.形flexible pieces.The elastic parts can be made of polyurethane rubber, cast nylon and other materials with different hardness according to the requirements of use.The working temperature range is -35～+80°C, the short-term working temperature can reach 100°C, and the nominal torque transmitted is 16～25000Nm.
3. Diaphragm coupling, its elastic element is a diaphragm group formed by a certain number of very thin polygonal ring (or circular ring) metal diaphragms. There are several bolt holes on the circumference of the diaphragm. Use twisted holes and bolts to connect with the half coupling at staggered intervals.In this way, the arc segment on the elastic element is divided into two parts that are alternately compressed and stretched. The stretched part transmits torque, and the compressed part tends to buckle.When there is axial, radial and angular displacement of the unit, the metal diaphragm will produce wavy deformation.
4. Roller chain coupling. This coupling uses a common double-row chain to mesh with two parallel sprockets with the same number of teeth at the same time to realize the coupling of the two halves of the coupling.
5. Elastic sleeve pin coupling. The structure of this coupling is similar to that of a flange coupling, except that a pin with an elastic sleeve is used instead of the connecting bolt.Because oil-resistant rubber is commonly used through the pupal shape to improve its elasticity.The matching hole of the half coupling and the shaft can be made into a cylindrical or conical shape.
6. Elastic pin coupling, when working, the torque is transmitted to the driven shaft through the two halves of the coupling and the nylon pin in the middle.In order to prevent the pin from falling off, the baffle is fixed with screws on the outside of the half coupling.This kind of coupling is very similar to the elastic sleeve pin coupling, but the torque capacity is large, the structure is simpler, the installation and manufacturing are convenient, the durability is good, and it also has a certain buffer and vibration absorption capacity, allowing the two to be connected. The shaft has a certain angular displacement, which is suitable for occasions with large axial movement, more forward and reverse changes and frequent starting. As nylon pins are sensitive to temperature, the operating temperature is limited to -20～+70°C In the range.
7. The tire coupling is made of rubber or rubber fabric as a tire-like elastic element, and the two ends are respectively pressed on the two half couplings with pressure plates and screws.This kind of coupling is flexible, has good vibration absorption ability, can effectively reduce dynamic load and compensate large axial displacement, and has good insulation performance and no noise during operation.The disadvantage is that the radial dimension is large; when the torque is large, additional axial load will be generated due to excessive torsional deformation.In order to facilitate assembly, the tire is sometimes cut out in a radial direction, but the load-bearing capacity should be significantly reduced.