German Renold clutch Renold model Renold price

Renold clutches automatically compensate for wear of friction elements through stroke, facilitating serialization and standardization. They are widely used in machine tools, construction machinery, and ships that require compact structures, frequent engagement, high speed, and remote operation. 1) High torque transmission capacity in a small volume; when dimensions are identical, the transmitted torque is 3 times greater than that of electromagnetic clutches; 2) No impact, smooth starting and reversing, but engagement speed is lower than that of pneumatic clutches.

Renold clutch structural types

Hydraulic clutches are classified by structure into rotating hydraulic cylinder and fixed hydraulic cylinder types. The former features a compact structure and small overall dimensions, but due to the rotation of the hydraulic cylinder, it has high moment of inertia, complex oil inlet connections, and centrifugal force acting on the oil during rotation, causing uneven oil pressure distribution on the piston. Fixed hydraulic cylinders do not rotate, resulting in low moment of inertia, simple and reliable oil inlet structures, and faster operating cycles. The reset spring force can be lower, but the overall dimensions are larger, requiring larger thrust bearings, and manufacturing is relatively complex.

Renold clutch features

1) Powder clutches and brakes are high-performance automatic control components. 2) High linearity and high-precision torque control. 3) Uses high-temperature-resistant coils and superalloy magnetic powder, offering long service life, smooth engagement, and no impact. 4) CNC precision manufacturing ensures high accuracy, fine machining, good linearity, and superior performance. 5) High-purity magnetic powder without black carbon powder ensures stable performance and long service life. 6) Aluminum alloy construction provides excellent heat dissipation, good demagnetization, and fast response speed. 7) Smooth operation with no vibration, impact, or noise during starting, running, and braking. 8) Torque is proportional to excitation current within the specified torque range, allowing use as a linear regulation component. 9) Constant output torque, as torque magnitude depends only on excitation current and is independent of slip speed. 10) Suitable for frequent engagement with fast response and high frequency, reaching up to 40-60 times per minute, widely applicable in fast-working states and high-frequency applications. 11) High power amplification factor, allowing control of large transmitted power with small excitation current, facilitating automatic control. 12) Smooth operation with no vibration, impact, or noise during starting, running, and braking. 13) Overload protection: automatic slip operation under torque overload conditions provides overload protection. 14) Small volume and light weight. Easy installation and long service life.

Renold clutch selection

1) Operating torque range: The maximum torque of a powder clutch during operation relates to coil temperature rise, magnetic saturation characteristics, powder life, and mechanical strength. It can be taken as 130% of the theoretical torque. The lower torque limit is determined by idle torque and torque stability, and should be above 50% of the theoretical torque. 2) Structural type: Rotating coil powder clutches with slip rings have good heat dissipation but are prone to failure during operation, resulting in poor reliability. Additionally, this structure requires frequent reverse operation, which is unfavorable for bearing life and unsuitable for high-speed transmission systems. Fixed coil powder clutches without slip rings offer reliable operation, low idle torque, and fast torque rise after energization, but excitation power, volume, and weight are slightly increased. 3) Working surface shape: Cylindrical rotor structures have large dimensions and uneven magnetic powder distribution, but stable performance, suitable for large machinery. Drum-shaped rotors have smaller moment of inertia and dimensions, suitable for mechanical transmissions requiring high sensitivity. Disc-shaped rotors have low moment of inertia and rapid action, suitable for high-frequency engagement applications.

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