Flexible Diaphragm Couplings - Metal Membrane Couplings

Flexible diaphragm coupling is a kind of high-performance flexible coupling, which compensates axial and angular displacements by the deformation of elastic diaphragm while transferring torque, metal membrane coupling features with compact structure, large transmission torque, long service life, maintenance-free, high temperature resistance, acid and alkali resistance, and corrosion resistance, suitable for shafting transmission in high temperature, high speed and corrosive environment.

China National Flexible Membrane Couplings

Rokee's RL series metal shim pack couplings are independently developed on the basis of high-quality products from Europe and Japan. Plate coupling has smaller volume, larger torque of the same type, more reasonable proportioning size, large compensation range, light weight and small moment of inertia. Special elastic gasket design is adopted in the hole connection part of bolt and diaphragm group, which greatly reduces the stress concentration in the hole edge part, eliminates the tear loss of diaphragm, and extends the service life. With modular design, the coupling assembly is simple and its maintenance and replacement are quick. The performance far exceeds the national standard JM series membrane disc couplings, which are widely used in fan systems, steam turbine units and other important industrial fields.

ROD Series Steel Laminae Couplings

Flexible Diaphragm Couplings,Metal Membrane Couplings

Flexible Diaphragm coupling is a high-performance metal elastic element flexible coupling. The Flexible Plate Coupling is composed of several sets of stainless steel thin plates connected to the two halves of the coupling in a staggered manner. Each set of diaphragms is composed of several stacked pieces. This design enables the Steel Laminated Flexible Coupling to compensate for the relative displacement between the two shafts connected by the elastic deformation of the diaphragm. The diaphragm coupling is composed of at least one diaphragm and two shaft sleeves. The diaphragm is fastened to the shaft sleeve with a pin, and generally does not loosen or cause backlash between the diaphragm and the shaft sleeve.

Main characteristics
Strong compensation capability: Shim Pack Couplings can compensate for axial, radial, and angular offsets caused by manufacturing errors, installation errors, load deformation, and temperature rise changes between the active and driven machines. Compared with gear couplings, its angular displacement can be doubled, the reaction force is smaller during radial displacement, and the flexibility is greater.
Shock absorption and noise reduction: Diaphragm couplings have obvious shock absorption effects, no noise, no wear, and are suitable for various harsh working environments.
Strong adaptability: Steel Plate Flexible Couplings can be used in high-temperature, high-speed, and corrosive environments without lubrication.
High transmission efficiency: The transmission efficiency of the metal disc coupling can reach 99.86%, especially suitable for medium and high-speed high-power transmission.
Simple structure: The diaphragm coupling has a simple structure, light weight, small volume, and easy installation and removal. It can be installed and removed without moving the machine (referring to the type with an intermediate shaft).

Flexible Membrane Couplings are widely used for shaft transmission in various mechanical devices, such as water pumps, fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining machinery, metallurgical machinery, aviation, high-speed power transmission systems for ships, steam turbines, piston power mechanical transmission systems, tracked vehicles, as well as high-speed and high-power mechanical transmission systems for generator sets.

Installation matters:
Appropriate protective equipment, such as thick gloves, should be worn during installation to avoid injury.
Protective covers and other devices should be installed around the coupling to ensure safety.
When the axis deviation exceeds the allowable value during installation, the coupling may deform, resulting in damage or shortened service life. Therefore, adjustments should be made during installation to ensure that the axis deviation is within the allowable range specified in the corresponding product catalog.
When tightening screws, a torque wrench should be used and screws other than attachments should not be used for installation.

Maintenance method:
Before installation, the end faces of both shafts should be cleaned and the fit of the end face key slots should be checked.
After the installation of the diaphragm coupling, if it runs normally for one shift, all screws must be checked. If they are found to be loose, they must be tightened several times to ensure that they do not loosen.
In order to prevent micro wear of the diaphragm during high-speed operation, which may cause micro cracks and damage to the diaphragm bolt holes, solid lubricants such as molybdenum disulfide can be applied between the diaphragms or the diaphragm surface can be treated with a wear-resistant coating.

Flexible Laminated Membrane Coupling is a type of coupling with high performance and wide applicability, which can meet the transmission needs of various harsh working conditions.