German ALP-80 coupling ALP-80 model ALP-80 price

ALP-80 coupling is a component that connects the prime mover to the driven machine. Its main function is overload protection. The torque limiter restricts the torque transmitted by the drive system by slipping when the required torque exceeds the set value due to overload or mechanical failure. It automatically re-engages once the overload condition disappears. This prevents mechanical damage and avoids costly downtime losses.

ALP-80 coupling introduction

Divided into two major categories: convex type and concave type. The convex type is further divided into three types: integral with skeleton, integral without skeleton, and radial slit type. Their common feature is that the tire ring is connected to the two halves of the coupling using bolts to achieve the connection of the two shafts. The inner side of the tire ring is bonded to the steel skeleton by vulcanization. Nuts are welded at the bolt holes on the skeleton. During assembly, bolts are used to connect to the flanges of the two coupling halves. Torque is transmitted by the friction generated between the tire and the flange end faces by tightening the bolts. The tire ring undergoes torsional shear deformation during operation. Therefore, tire couplings have high elasticity, a large ability to compensate for relative displacement between two shafts, and good damping. They also have a simple structure, require no lubrication, and are convenient to assemble, disassemble, and maintain.

ALP-80 coupling imbalance phenomenon

Due to various reasons, the center of mass or principal axis of inertia of a tire coupling does not coincide with its axis of rotation. During operation, this produces unbalanced centrifugal inertial forces, centrifugal inertial couples, and dynamic deflection (vibration mode). This is called rotor imbalance. This imbalance inevitably causes vibration in the shaft system, affecting the normal operation and service life of the machine. Therefore, it must be taken seriously. To correct or minimize the imbalance of tire couplings, an appropriate balance grade should be selected as needed. After product manufacturing and installation on the machine, balance is achieved on the specified balance (correction) 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. It can also be expressed as the mass-radius product per unit mass, called eccentricity e (not eccentricity 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 is often used for balancing operations on specific rotors. The latter is used to evaluate the quality of rotor balance or detect balance precision. The balance grade standard for tire couplings is evaluated based on e.

ALP-80 coupling maintenance

1) For jaw couplings, listen for abnormal sounds, or manually rotate the two coupling halves to check for excessive circumferential play. If present, the jaw rubber ring may be damaged; alternatively, check if the coupling half is loose on the shaft. 2) For flange couplings, if the connecting bolt holes or pin holes of the two coupling halves are severely worn, the usual method is to machine the holes and fit suitable bolts, or to fill the holes with electric welding 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, replacement is required. 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; otherwise, replace them promptly. 6) If the fit between the coupling half or gear coupling sleeve and the shaft does not meet drawing requirements, or if there are significant scratches on the shaft due to key loosening, repair is required promptly. Generally, only the coupling or sleeve is repaired; shaft repair is not permitted to prevent shaft breakage accidents. 7) Lubricate couplings that require lubrication regularly. Slider couplings, universal joints, chain couplings, etc., all require regular oiling and lubrication. Our company uses universal joints extensively, especially in the packaging workshop.

Weidou Intelligent Technology professionally sells German ALP-80 rigid couplings, ALP-80 flexible couplings, ALP-80 safety couplings, ALP-80 universal joints, ALP-80 disc couplings, ALP-80 jaw couplings, ALP-80 flange couplings, ALP-80 cross slide couplings, ALP-80 slider couplings, ALP-80 gear couplings, ALP-80 tire couplings, ALP-80 elastic couplings, ALP-80 bellows couplings, ALP-80 roller chain couplings, ALP-80 spring couplings, ALP-80 original German imports. Welcome inquiries and orders from customers.