The structure of the diaphragm coupling 
 Diaphragm coupling, at least by a diaphragm and two sleeve. Diaphragm with a pin secured to the sleeve on generally do not loose or cause the recoil between the diaphragm and the sleeve. Some manufacturers diaphragm, there are three diaphragm, the middle one or two rigid components, on both sides and then even on the sleeve. Single diaphragm couplings and dual-diaphragm couplings is different to deal with deviations ability, in view of the need diaphragm complex curved, single diaphragm coupling are not accustomed to eccentric. The dual-diaphragm couplings song in different directions, in order to compensate for the eccentric. 

 Diaphragm coupling characteristics: 
 (1) high rigidity, high torque, low inertia; 
 (2) stainless steel just piece of circular or square elastic deformation; 
 (3) high torque bearing, high torsional rigidity and excellent sensitivity; 
 (4) Zero backlash, clockwise and counterclockwise rotation characteristics is the same; 
 (5) maintenance-free, super-resistant to oil and corrosion resistance; 
 (6) stainless steel diaphragm to compensate for radial, angular, axial deviation, single diaphragm can not compensate for radial deviation 

 Staggered with bolts by a few group of diaphragm (stainless steel sheet) connected with the coupling halves, each group diaphragm stacked set is made from several pieces, the diaphragm is divided into the link and different shapes of the whole piece. Diaphragm couplings depend on the elastic deformation of the diaphragm to compensate for the associated two-axis relative displacement is a high performance metal strong element flexible coupling, without lubricant, the structure is more compact, high strength, long life rotating gap, independent of temperature and oil slicks, with acid, alkali corrosion characteristics, suitable for high temperature, high-speed, shaft drive corrosion environment of medium conditions, widely used in various mechanical devices, shaft drive such as pumps (especially high-power, chemical pumps), fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining machinery, metallurgical machinery, aviation (helicopters), ships high-speed power transmission system, turbine, piston dynamic mechanical drive system, tracked vehicles, as well as high-speed generator sets, high-power mechanical transmission system, by balancing applied to high-speed drive shafts have been relatively S & P will be. 


 Characteristics: eccentric allow the range, and rapid disassembly. No noise, wear and tear, no sliding friction rotating parts, which reduces the energy loss; light weight, suitable for high speed situations; sleeve connection with expansion sets clearance links can be used for servo positioning system. The middle of the elastic components imported stainless steel, high strength, long life, and can be used in corrosive environments. 
 Diaphragm coupling 

 Diaphragm couplings advantage of diaphragm couplings, gear coupling, there are no sliding, no lubrication, sealing, no noise, the basic need of maintenance, manufacturing, could partially replace the gear coupling. Diaphragm coupling industrial countries in the international application is very common in our country has drawn up the machinery industry standards, has recently been revised to a new industry standard: JB / T 9147-1999 (instead of the ZB / T J19022-90) coupling Each torque 
 This feature of the diaphragm coupling is a bit like a bellows coupling, actually almost all the way couplings transmit torque. The diaphragm itself is very thin, so when the relative displacement load generated, it is easy to bend, it can withstand up to 1.5 degrees deviation in the servo system to result in lower bearing loads. Diaphragm coupling is commonly used in the servo system, the diaphragm has a very good torsional rigidity, but less in the bellows coupling. On the other hand, the diaphragm coupling is very delicate, if the use, misuse, or not installed correctly and is very easy to damage. To ensure that deviations within the tolerance range of the normal operation of the coupling is necessary. 

 The application of the diaphragm coupling: 
 Widely used in various mechanical devices, shaft drive, such as pumps (especially high-power, chemical pumps), fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining machinery, metallurgical machinery, aviation (helicopters), ships high-speed drivetrain, turbine, piston dynamic mechanical drive system, tracked vehicles, as well as high-speed generator sets, high-power mechanical transmission system, by balancing applied to high-speed drive shafts have been relatively common . 
 Use: Widely used in metallurgy, mining, steel rolling, fans, packaging machinery, paper machinery, chemical pumps and other industries. The way of linking with expansion sets are widely used in CNC machine tool industry.