Coupling Element & Sizing ® TRASCO Jaw Couplings 2 www.jbj.co.uk/couplings.html #DriveLineHarmony Spider Elements The coupling element gear ring is made of a particular polyurethane resin which shows great advantages in comparison to the standard polyurethanes available on the market. The urethane compound of these polyurethane coupling element gear ring offers resistance to aging, hydrolysis, fatigue, and abrasion making it suitable for even the most demanding applications in high humidity conditions. It is self-damping and shows a great resistance to the main chemical agents, acids, oils, and ozone. Special types of gear rings are available in order to provide the right solution for each specific application, covering a large range of temperatures and resisting specific chemical agents. Applications Admissible Temperature (°C) at work peaks Standard Spiders Shore Hardness Colour Compound 92° Sh A Yellow Polyurethane from -40°C to +90°C from -50°C to +120°C wide range of industrial applications (low-mid power) 98° Sh A Red Polyurethane from -30°C to +90°C from -40°C to +120°C high torque ~ narrow angular misalignment ~ torsional rigidity 64° Sh D Green Polyurethane from -30°C to +110°C from -30°C to +130°C dampened areas ~ internal combustion engines Applications Admissible Temperature (°C) at work peaks Spiders for Special Applications Colour Compound internal combustion engines ~ high dynamic solicitations ~ 80° Sh A Blue Polyurethane from -50°C to +80°C from -60°C to +120°C highly damped areas high torsional rigidity ~ high temperature areas ~ PA Grey Polyamide from -20°C to +110°C from -30°C to +150°C high resistance Available on request spiders with different compound for special applications: » High working temperature. » Heavy working conditions. » Heavy environment conditions. » Resistance to specific chemicals. ® TRASCO Coupling Sizing as of DIN 740/2 ® TRASCO coupling sizing is made according to DIN 740/2. Couplings must be selected to ensure that the maximum admissible torque is never exceeded during operation. It is necessary to have correct sizing, so that all conditions hereunder are respected. 1) Verify the nominal torque The nominal torque of the coupling must be greater than or equal to the nominal torque of the drive multiplied by the temperature safety factor. T >T •S (Nm) KN N q Note that T = 9550 P (Nm) N N n Where P is the motor nominal power in kW. N 2) Verify the maximum torque. The max torque of the coupling must be greater than or equal to the starting torque Ts multiplied by the safety factors S , S , S where S is the higher value θ Z u u between driver and driven units. T > T • S • S • Su (Nm) Kmax S q Z 3) Verify torque with reversal. In case of torque with reversals it must be verified that: T > T • S (Nm) KW W q where T = torque with reversal, which the coupling can bear, and T = torque variation of the drive. KW W Shore Hardness
RkJQdWJsaXNoZXIy NzQyNjQ=