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    The advantages of the elastic diaphragm coupling and the compensation problem of the diaphragm coupling

    Release Date: 2021-05-11 Publisher: admin

    Advantages of elastic diaphragm coupling:

    [1] Great ability to compensate misalignment, easy to install and align

    The diaphragm coupling adopts austenitic stainless steel diaphragm, which can withstand large deformations while transmitting torsion, thereby compensating for the misalignment of the two shafts.The non-metal elastic coupling is restricted by the low strength and easy aging of the non-metal elastic element, which not only has a short life, but also has a small compensation ability.Gear couplings are restricted by the relative slip speed of the tooth surface and lubrication conditions. According to the information, the relative slip speed of the tooth surface should not be greater than 0.12m/s. The angular compensation ability is small.Therefore, the installation and alignment requirements for non-metal elastic couplings and gear couplings are relatively good.Once the misalignment exceeds the allowable range, it will cause the coupling to fail.

    [2] All-metal structure, large torque transmission capacity, good service life

    The diaphragm coupling uses a metal diaphragm as an elastic element, which has good strength and large load transfer capacity, and there are no non-metal parts in the whole product, no aging problem, good service life, and it is suitable for harsh use environments.This is a non-metallic elastic element coupling.

    【3】Dry coupling without lubrication

    The elastic diaphragm coupling relies on the metal diaphragm to transmit torque and absorb the deformation caused by misalignment. There is no relative movement between the parts, no friction and 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 slippage between the tooth surfaces to compensate for the misalignment of the two shafts. Therefore, the gear coupling should be lubricated, and the lubrication condition determines the gear coupling The key to good or bad work.Especially when it is running, it is prominent, such as the separation and leakage of oil under the action of centrifugal force, and the selection of lubricating oil. Often because the lubrication design uses the bearing lubricating oil of the connected machine, rather than the appropriate load capacity Gear lubricants.Therefore, the lubrication problem of the running gear coupling 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 choice for high-power applications, with the emergence and development of diaphragm couplings, gear couplings have gradually faded out.

    The diaphragm coupling bolt connection does not need to be threaded on the connecting piece, the use is not restricted by the connecting piece, the structure is simple, and the disassembly and assembly are convenient.Stud bolts can be used in occasions where bolts cannot be used due to structural restrictions, but a compact connection structure is required.The bolt connection does not have a nut and has a smooth exposed surface, but it is not suitable for frequent disassembly and connection to avoid damage to the threaded hole.

    During the service life of the diaphragm coupling, it is necessary to maintain the wedge-shaped clearance surfaces that are inclined to each other, add lubricating oil, and exit from the large port into the small port.The two surfaces have sufficient relative movement speed, the fluid has sufficient viscosity, and sufficient oil is required.In the maintenance process, it is important to grasp the basic scope of hydrodynamic lubrication, which is also the theoretical basis of sliding bearing design.

    The diaphragm coupling can actively compensate the axial, radial and angular offset caused by the motor, as well as the influence caused by factors such as manufacturing error, installation error, bearing deformation and temperature rise.Diaphragm coupling is a metal elastic element in flexible coupling. The advantages of driven torque transmission, elastic vibration, no noise, and no lubrication are the ideal products to replace gear couplings and general couplings.

    The diaphragm-type elastic coupling can compensate for the axial, radial and angular deviations between the driving machine and the driven machine due to manufacturing errors, installation errors, load-bearing deformation, and the effects of temperature rise changes.The diaphragm-type elastic coupling is a flexible coupling with a metal elastic element. It relies on the metal coupling diaphragm to connect the main and driven machines to transmit torque. It has the advantages of elastic vibration reduction, no noise, and no need for lubrication. It is an ideal product to replace gear couplings and general couplings.When standard torque appearance is used, no matter what method or equipment is selected, the coupling must accept the corresponding axial force and bending moment, and try to prevent the appearance of excessive force, which directly causes the appearance of damage and cannot be used.When using a torque sensor, pay attention to the question of the equipment. Because the torque sensor belongs to the power equipment, it is the application of the dynamic torque sensor connected to the motor. The measurement of large torque requires careful use, load equipment, couplings, and couplings. The connection with the sensor and the connection between the coupling and the power equipment must not be neglected.