German DD RTR G1/2A RH coupling DD RTR G1/2A RH model DD RTR G1/2A RH price

DD RTR G1/2A RH couplings are mechanical components used to connect two shafts (driving shaft and driven shaft) in different mechanisms, enabling them to rotate together to transmit torque. In high-speed, heavy-load power transmission systems, some couplings also provide cushioning, vibration damping, and improved dynamic performance of the shaft system. A coupling consists of two halves, each connected to the driving shaft and the driven shaft respectively. Generally, prime movers are connected to working machines via couplings.

DD RTR G1/2A RH coupling manufacturing process

Jaw couplings are manufactured using machining methods such as turning, milling, and broaching, followed by overall heat treatment to ensure sufficient mechanical strength. There is another type of jaw hub on the market that is cast, allowing for mass production and eliminating machining losses. Therefore, the price is much lower than that of machined parts. However, the performance of castings is not very good. It is best not to use them in critical applications. Furthermore, the jaws of cast hubs are prone to tooth breakage (jaw detachment) under high speed or high load conditions. 1) Compact, backlash-free, available with three different hardness elastomers; 2) Absorbs vibration, compensates for radial and angular misalignment; 3) Simple structure, easy maintenance and inspection; 4) Maintenance-free, oil-resistant and electrically insulating, operating temperature 20℃ to 60℃; 5) Jaw elastomers are available in four-lobe, six-lobe, eight-lobe, and ten-lobe configurations; 6) Fixing methods include set screw, clamping, and keyway fixation.

DD RTR G1/2A RH coupling features

Elastomers are generally composed of engineering plastics or rubber. The service life of a coupling is determined by the service life of the elastomer. Since elastomers are subjected to compression rather than tension, their typical service life is 10 years. Due to their cushioning and vibration-damping properties, elastomers are widely used in applications with strong vibrations. The performance limit temperature of the elastomer determines the operating temperature of the coupling, typically ranging from -35 to +80 degrees. Jaw couplings feature a simple structure, require no lubrication, are easy to maintain and inspect, are maintenance-free, and allow for continuous long-term operation. High-strength polyurethane elastic elements are wear-resistant and oil-resistant, offering high load capacity, long service life, and safe, reliable operation. They provide stable and reliable performance with excellent vibration damping, cushioning, and electrical insulation properties. They offer significant axial, radial, and angular compensation capabilities. The structure is simple, with small radial dimensions, light weight, and low moment of inertia, making them suitable for medium to high-speed applications. Structural features: 1) Central elastomer connection. 2) Absorbs vibration and compensates for radial, angular, and axial misalignment. 3) Oil-resistant and electrically insulating. 4) Identical rotational characteristics in both clockwise and counter-clockwise directions. 5) Set screw fixation.

DD RTR G1/2A RH coupling installation method

1) Before installation, first check whether the shafts of the prime mover and the driven machine are concentric, whether there is packaging paper or damage on the shaft surfaces, whether there are foreign matters in the inner holes of the two halves of the plum blossom coupling, and whether there is damage on the inner hole edges. If so, clean the shafts and half-couplings, and use a fine file to repair any damage. Then check whether the inner hole diameter and length of the two half-couplings match the diameter and shaft extension length dimensions of the prime mover and the driven machine. Generally, when selecting models, it is better to make the length of the half-coupling at the ends of the prime mover and the driven machine shorter than their shaft extension lengths by 10—30mm. 2) To facilitate installation, it is best to place the two half-couplings in an insulated box or oil bath at 120--150 for preheating, so that the inner hole size expands and can be easily installed. After installation, ensure that the shaft head does not protrude beyond the end face of the half-coupling; being flush is preferable. Check the distance between the two half-couplings: measure the readings at 3--4 points along the inner sides of the flanges of the half-couplings, take the average value, and compare it with the sum of the actual measured dimensions of the extended section and the two diaphragm groups. The error should be controlled within the range of 0—0.4mm. 3) Alignment: Use a dial indicator to check the end face and outer circle runout of the flanges of the two half-couplings. When the outer circle of the flange is less than 250mm, the runout value should not exceed 0.05mm; when the outer circle of the flange is greater than 250mm, the runout value should not exceed 0.08. 4) Install bolts: Insert the bolts from the outside of the small holes of the flange, pass them through the large holes of the other flange, put on the buffer sleeve and elastic washer, and tighten the nuts with a wrench. If installation is improper or needs to be removed and replaced without damaging the shafts and half-couplings, ensure smooth rotation after installation without resistance. 5) Operator's note: Before starting the equipment, check whether the nuts of the plum blossom coupling are loose or fallen off. If so, promptly tighten the nuts with a wrench.

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