German Kerb-Konus coupling Kerb-Konus model Kerb-Konus price

Kerb-Konus couplings consist of components such as an internal gear ring and a flanged half-coupling with external teeth, both having the same number of teeth. External teeth are available in two profiles: straight teeth and crowned teeth. Crowned teeth refer to external teeth machined into a spherical surface, with the sphere's center on the gear axis. The backlash is larger than that of standard gears. Crowned tooth couplings allow greater angular misalignment (compared to straight-tooth couplings), improve tooth contact conditions, increase torque transmission capacity, and extend service life. During operation of gear couplings, relative displacement occurs between the two shafts, causing periodic axial sliding between the tooth surfaces of the internal and external gears, which inevitably leads to tooth surface wear and power loss. Therefore, gear couplings must operate under good lubrication and sealing conditions.

Kerb-Konus coupling introduction

They are divided into two main categories: convex and concave. Convex types are further divided into three variants: integral with skeleton, integral without skeleton, and radially slotted. Their common feature is connecting the two half-couplings with bolts through the tire ring to achieve shaft connection. The inner side of the tire ring is bonded to a steel skeleton using vulcanization, and nuts are welded at the bolt holes on the skeleton. During assembly, bolts connect to the flanges of the two half-couplings. Torque is transmitted by the friction generated between the tire and the flange end faces when the bolts are tightened. The tire ring undergoes torsional shear deformation during operation, giving tire couplings high elasticity, significant capability to compensate for relative shaft misalignment, and good damping. They also feature a simple structure, require no lubrication, and are easy to install, disassemble, and maintain.

Kerb-Konus coupling imbalance phenomena

Due to various reasons, the center of mass or principal axis of inertia of a tire coupling may not coincide with its axis of rotation. During operation, this results in unbalanced centrifugal inertial forces, centrifugal inertial couples, and dynamic deflection (vibration mode), known as rotor imbalance. This imbalance inevitably causes vibration in the shaft system, affecting normal machine operation and service life, so it must be taken seriously. To correct or minimize the imbalance of tire couplings, an appropriate balance grade should be selected as needed. After manufacturing and installation on the machine, balance (correction) is achieved on the specified balance plane of the coupling by adding or removing appropriate mass to meet the balance grade requirements. This process is called balance correction, or simply balancing. The degree of imbalance (imbalance amount U) is usually expressed by the product mr of the rotor mass m and the distance r from the center of mass to the rotor axis of rotation, known as the mass-radius product. Alternatively, it can be expressed as the mass-radius product per unit mass, known as eccentricity e (not in the geometric sense). The mass-radius product mr is a relative quantity related to rotor mass, while eccentricity e is an absolute quantity independent of rotor mass. The former is more intuitive and commonly used for balancing specific rotors, while the latter is used to evaluate the quality of rotor balance or detect balancing precision. The balance grade standard for tire couplings is assessed based on e.

Kerb-Konus coupling maintenance

1) For jaw couplings, listen for abnormal noises or manually rotate the two half-couplings to check for excessive circumferential play. If present, the jaw rubber ring may be damaged; alternatively, check if the half-coupling is loose on the shaft. 2) For flange couplings, if the bolt holes or pin holes in the two half-couplings are severely worn, the usual method is to machine the holes and fit suitable bolts, or to weld-fill the holes and re-machine them. 3) For slider couplings, pay attention to lubrication conditions. 4) For gear couplings, inspect the tooth profile using calipers, span micrometers, or templates. If tooth thickness wear exceeds 5~30% of the original tooth thickness, replace the component; for running mechanism gear couplings, the limit is 20~30%. 5) Check that the sealing devices, retaining rings, expansion rings, springs, etc., of the gear coupling are not damaged or aged; replace them promptly if they are. 6) If the fit between the half-coupling or gear coupling bushing and the shaft does not meet drawing requirements, or if there are significant scratches on the shaft due to key loosening, perform timely repairs. Generally, only the coupling or bushing is repaired; shaft repair is not permitted to prevent shaft breakage accidents. 7) Lubricate couplings requiring lubrication regularly. Slider couplings, universal joints, chain couplings, etc., all require regular oiling and lubrication. Our company uses universal joints frequently, especially in the packaging workshop.

Weidou Intelligent Technology specializes in selling German Kerb-Konus rigid couplings, Kerb-Konus flexible couplings, Kerb-Konus safety couplings, Kerb-Konus universal couplings, Kerb-Konus disc couplings, Kerb-Konus jaw couplings, Kerb-Konus flange couplings, Kerb-Konus cross slide couplings, Kerb-Konus slider couplings, Kerb-Konus gear couplings, Kerb-Konus tire couplings, Kerb-Konus elastic couplings, Kerb-Konus bellows couplings, Kerb-Konus roller chain couplings, Kerb-Konus spring couplings, Kerb-Konus original German imports. Welcome inquiries and orders from customers.