Metal Diaphragm Couplings

The metal diaphragm coupling is composed of several sets of stainless steel thin plates connected in a staggered manner to the two halves of the coupling, with each set of diaphragms consisting of several stacked pieces. The diaphragm is divided into connecting rod type and integral pieces of different shapes, which are fastened to the shaft sleeve with pins and generally do not loosen or cause backlash between the diaphragm and the shaft sleeve. Some couplings consist of two diaphragms, while others consist of three diaphragms with one or two rigid elements in between, connected to the shaft sleeve on both sides.

The metal diaphragm coupling compensates for the relative displacement of the two shafts connected by the elastic deformation of the diaphragm, including axial, radial, and angular offsets. This characteristic makes the diaphragm coupling suitable for various shaft transmission systems with manufacturing errors, installation errors, load deformation, and temperature rise changes.

Main Features 

• Strong compensation capability: Compared with gear couplings, diaphragm couplings have twice the angular displacement, smaller reaction force during radial displacement, greater flexibility, and allow for certain axial, radial, and angular displacements.
  

• Shock absorption and noise free: The diaphragm coupling has a significant shock absorption effect and does not require lubrication, so it operates without noise or wear.
  

• Wide applicability: It can be used in high-temperature, high-speed, and corrosive environments, and is suitable for various harsh working conditions.
  

• High transmission efficiency: up to 99.86%, especially suitable for medium and high-speed high-power transmission.
  

• Simple and lightweight structure: light weight, small size, easy to assemble and disassemble, no need to move the machine for assembly and disassembly.
  

• Accurate transmission of rotational speed: It can accurately transmit rotational speed, operate without slip, and can be used for transmission of precision machinery.

Metal diaphragm 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:

• Please ensure that the axis deviation is within the allowable range during installation to avoid deformation or damage to the coupling.
  

• Products with film have edges and may cause injury. It is recommended to wear protective measures such as thick gloves during installation.
  

• Please install protective covers and other devices around the coupling to ensure safety.

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.