JMJM Series Diaphragm Coupling, JB/T 9147

JM Diaphragm Coupling YONGJING

JM is a diaphragm (disc) coupling: torque is carried by packs of metal diaphragms that compensate axial, radial and angular misalignment caused by installation tolerances, deformation under load and thermal expansion. The series was developed by Yongjing jointly with the Shanghai Research Institute of Materials; the plant builds five basic series and over a hundred sizes. Transmission efficiency up to 99.86 %, operating temperature −80…+300 °C, no lubrication, backlash or wear. JB/T 9147 series: JMI 25–160,000 N·m, JMII 40–180,000 N·m, bores 14–340 mm. No direct GOST; counterparts are Rexnord Thomas and KTR Radex-N.

Specifications

Rated torque: JMI 25–160,000 N·m; JMII 40–180,000 N·m (JB/T 9147 series)
Bore range: 14–340 mm (JB/T 9147 series)
Max. speed: up to 6,000 rpm (JMI), up to 10,700 rpm (JMII) — JB/T 9147 series
Transmission efficiency: up to 99.86 % (Yongjing data)
Misalignment: axial, radial and angular; angular about twice that of gear couplings (Yongjing data)
Operating temperature: −80…+300 °C (Yongjing data)
Maintenance: no lubrication, no backlash or wear; the spacer-shaft version is removed without moving the machines (Yongjing data)
Standard: JB/T 9147; no GOST counterpart (Rexnord Thomas, KTR Radex-N)