Diaphragm coupling is a metal flexible coupling, which is a transmission device that uses a metal elastic diaphragm as a flexible element to transmit torque. Its main features: large torque transmission capacity, diaphragm deformation to absorb the misalignment of the unit, no relative movement between the parts, no wear, no noise, long vibration damping life, and no lubrication. The torsional stiffness and critical speed can be adjusted by changing the outer diameter or wall thickness of the middle section, thereby improving the torsional vibration characteristics of the unit.
The diaphragm coupling is composed of at least one diaphragm and two shaft sleeves. The diaphragm is fastened to the sleeve with a pin and generally will not loosen or cause backlash between the diaphragm and the sleeve. Some manufacturers provide two diaphragms, and some provide three diaphragms, with one or two rigid elements in the middle, and the two sides are connected to the shaft sleeve. The difference between the single diaphragm coupling and the double diaphragm coupling is the ability to handle various deviations. In view of the complex bending of the diaphragm, the single diaphragm coupling is not suitable for eccentricity. The double diaphragm coupling can bend in different directions at the same time to compensate for eccentricity.
The main characteristics of the diaphragm coupling
(1) The ability to compensate for the misalignment of the two axes is strong. Compared with the gear coupling, the angular displacement can be doubled, the reaction force is small during the radial displacement, the flexibility is large, and a certain axial, radial and angular displacement are allowed. To displacement.
(2) It has obvious shock absorption, no noise and no wear.
(3) Adapt to work in high temperature (-80 plus 300) and harsh environments, and can operate safely under shock and vibration conditions.
(4) The transmission efficiency is high, up to 99.86 percent . Especially suitable for medium, high speed and high power transmission.
(5) Simple structure, light weight, small size, convenient assembly and disassembly. It can be assembled and disassembled without moving the machine (refer to the type with intermediate shaft), and no lubrication is required.
(6) It can accurately transmit the speed without slip, and can be used for the transmission of precision machinery.
Currently known diaphragm couplings can produce a maximum coupling transmission power of 50,000kw, a maximum speed of 80,000rpm, and a maximum length of 12 meters. At present, the diaphragm coupling can be modified in many ways.
Use of diaphragm coupling
Diaphragm couplings are widely used in shaft transmission of various mechanical devices, such as water pumps (especially high-power, chemical pumps), fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining Machinery, metallurgical machinery, aviation (helicopter), naval high-speed power transmission systems, steam turbines, piston-type power mechanical transmission systems, crawler vehicles, and generator sets high-speed, high-power mechanical transmission systems, which are applied to high-speed transmission after dynamic balance Shafting has become more common.
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