Diaphragm couplingRelying on the metal diaphragm to transmit the torque and absorb the deformation caused by the misalignment, there is no relative movement between the parts, there is no friction, wear, so it does not need lubrication, which is in line with the development direction of oil-free process equipment.The gear coupling is a rigid movable coupling. It relies on the relative slip between the tooth surfaces to compensate for the misalignment of the two shafts. Therefore, the gear coupling must be lubricated, and the lubrication condition determines the gear coupling. The key to good shaft work.Especially when it is running at high speed, it is more prominent, such as under the action of centrifugal force, oil separation, leakage, etc., and the choice of lubricating oil, often because the lubrication design uses the bearing lubricating oil of the connected machine instead of the carrying capacity More suitable gear lubricants.Therefore, the lubrication problem of high-speed gear couplings is particularly prominent.On the other hand, the wear caused by the relative slippage of the tooth surface will cause a series of problems such as sludge and imbalance.Therefore, although gear couplings were once the best choice for high-speed and high-power applications, with the emergence and development of diaphragm couplings, gear couplings have gradually faded out.
The diaphragm coupling adopts a high-strength austenitic stainless steel diaphragm, which can withstand large deformations while transmitting torsion, thereby compensating for the misalignment of the two shafts.Non-metal elastic couplings are made of paper with low strength and easy aging of non-metal elastic elements, which not only has a short life, but also has a small compensation capacity.The gear coupling is restricted by the relative sliding speed of the tooth surface and the lubrication conditions, and the angular compensation ability is very small.Therefore, non-metal elastic couplings and gear couplings require higher installation and alignment.Once the misalignment exceeds the allowable range, it will cause rapid failure of the coupling.