RLMD Standard Double Section Small Metal Diaphragm Coupling
The RLMD standard double section small metal diaphragm coupling is suitable for various industrial process pumps and small torque working occasions with a working speed not exceeding 5000rpm.
| Model | D | D1 | D3 | d1 | d2 | L | F | Maximum Allowable Speed | Nominal Torque | Maximum Instantaneous Torque | Peak Torque | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | (mm) | n max（r/min） | T(N.m) | Tmax(N.m) | Tmax(N.m) | ||
| RLMD80-4 | 80 | 42 | 42 | 19~28 | 19~28 | 25~50 | 100-140 | 4000 | 40.5 | 310 | 140 | |
| RLMD92-4 | 92 | 54 | 73 | 19~38 | 19~38 | 25~50 | 100-140-180 | 67 | 420 | 200 | ||
| RLMD102-4 | 102 | 61 | 60 | 19~42 | 19~42 | 28~70 | 100-140-180 | 150 | 750 | 400 | ||
| RLMD120-4 | 120 | 78 | 78 | 24~55 | 24~55 | 35~80 | 100-140-180-200 | 205 | 1495 | 630 | ||
| RLMD130-4 | 130 | 88 | 86 | 24~60 | 24~60 | 35~80 | 100-140-180-200 | 410 | 1780 | 1000 | ||
| RLMD145-4 | 145 | 98 | 97 | 42~70 | 42~70 | 35~80 | 140--180-200-250 | 950 | 3150 | 2000 | ||
| RLMD178-4 | 178 | 114 | 113 | 42~75 | 42~75 | 70~90 | 180--200-250 | 1450 | 5500 | 3550 | ||
| RLMD195-4 | 195 | 126 | 147 | 42~90 | 42~90 | 80~100 | 180-200-250-280-300 | 2100 | 10050 | 6300 | ||
| Model | Mass Point G | Angular Deviation | Axial Deviation | Intermediate Joint Sleeve H | Intermediate Sleeve Quality | Intermediate Sleeve Rotational Inertia | Intermediate Sleeve Torsional Stiffness | Quality | Torsional Stiffness | Rotational Inertia | Angular Stiffness | Axial Force |
| (mm) | (±△º) | (±△mm) | min(mm) | kg/m | Jh（Kg.m²) | Ct10E6(N.m/rad) | (Kg) | Ct10E6(N.m/rad) | J（Kg.m²) | N.m/deg | N | |
| RLMD80-4 | 38.1 | 1° | 2 | 100 | 4.05 | 0.0014 | 0.014 | 2.97 | 0.021 | 0.00152 | 15.4 | 185 |
| RLMD92-4 | 49.7 | 2.5 | 140 | 4.72 | 0.0022 | 0.022 | 3.35 | 0.024 | 0.00283 | 19.4 | 215 | |
| RLMD102-4 | 66.4 | 2.8 | 180 | 5.72 | 0.0038 | 0.039 | 6.4 | 0.034 | 0.052 | 22.9 | 315 | |
| RLMD120-4 | 66.8 | 3.4 | 200 | 8.61 | 0.0087 | 0.089 | 9.7 | 0.035 | 0.122 | 15 | 290 | |
| RLMD130-4 | 80 | 3.9 | 200 | 9.97 | 0.0135 | 0.138 | 12.2 | 0.055 | 0.0197 | 20.5 | 515 | |
| RLMD145-4 | 84.2 | 4.0 | 250 | 11.2 | 0.0191 | 0.195 | 17.5 | 0.086 | 0.0363 | 25.2 | 700 | |
| RLMD178-4 | 84.6 | 5.9 | 250 | 13.8 | 0.0.56 | 0.362 | 28.5 | 0.209 | 0.0815 | 37.9 | 1630 | |
| RLMD195-4 | 106.1 | 6.4 | 300 | 13.8 | 0.0356 | 0.362 | 32.7 | 0.29 | 0.1439 | 44.8 | 2150 | |
The standard small Steel Laminae coupling is a high-performance metal elastic element flexible coupling.
Composition: The Shim Pack coupling is composed of several sets of diaphragms (stainless steel thin plates) connected to the two halves of the coupling in a staggered manner with bolts. Each set of diaphragms is composed of several stacked pieces, and the diaphragms are divided into connecting rod type and integral pieces of different shapes.
Design: It has a compact structure, high strength, long service life, and does not require lubrication or rotational clearance.
Compensation capability: The double diaphragm coupling compensates for the relative displacement of the two shafts connected by the elastic deformation of the diaphragm, including axial, radial, and angular displacements. Its angular displacement compensation capability is particularly outstanding, reaching twice that of traditional gear couplings.
Corrosion resistance: It has the characteristics of acid resistance, alkali resistance, and corrosion resistance, and is suitable for shaft transmission in high-temperature (-80~300 ℃), high-speed, and corrosive medium working conditions.
Transmission efficiency: High transmission efficiency, up to 99.86%, especially suitable for medium and high-speed high-power transmission.
Shock absorption and noise reduction: It has a significant shock absorption effect, operates without noise, and has no wear.
Easy installation: simple structure, light weight, small size, easy to install and disassemble, no need to move the machine body for installation and disassembly.
Standard small Plate couplings are widely used in shaft transmission of various mechanical devices, such as water pumps, fans, compressors, hydraulic machinery, petroleum machinery, printing machinery, textile machinery, chemical machinery, mining machinery, metallurgical machinery, aviation, and high-speed power transmission systems for ships, due to their excellent performance. Especially in situations where high-precision transmission, corrosion resistance, high temperature resistance, and vibration impact resistance are required, the double diaphragm coupling performs exceptionally well.
When installing the double diaphragm coupling, ensure that the bolts are installed correctly and do not reverse or drop any small parts, including spring washers. Attention should also be paid to the direction of the membrane to ensure correct contact between the membrane and the buffer sleeve, and to avoid affecting the service life of the rivet assembly.
The double diaphragm coupling is maintenance free and requires minimal maintenance. It only needs to be checked regularly for its operating status.
Standard small Flexible Membrane couplings play an important role in the field of mechanical transmission due to their unique structure and excellent performance.