Long Universal Joint Coupling
Long universal joint coupling is a specially designed mechanical transmission device, mainly used to connect two shafts and transmit torque and rotational motion between them, while allowing a certain degree of angular deviation, radial offset, and axial displacement between the two shafts. Compared to standard universal joint couplings, it has a longer intermediate connection section, making it particularly suitable for applications that require larger shaft spacing or specific installation conditions.
Long type universal joint couplings typically consist of two universal joints and an intermediate shaft, which allows them to compensate for large angular deviations and axial displacements while maintaining the continuity and stability of power transmission. Due to its unique structural characteristics, long universal joint couplings have demonstrated irreplaceable advantages in various industrial applications.
The core structure of the long universal joint coupling mainly includes the following parts:
Cross shaft assembly: A cross shaft made of high-strength alloy steel, equipped with precision needle roller bearings to ensure reliable operation under heavy load conditions.
Flange fork: a flange component that connects the drive shaft and the driven shaft, usually manufactured using forging technology, and has high strength characteristics.
Intermediate shaft: a specially designed elongated connecting shaft that can be adjusted in length according to different application requirements, usually using a hollow tube structure to reduce weight.
Sealing system: Lubricating grease sealing device to prevent pollutants from entering the bearing area and extend its service life.
The long universal joint coupling has multiple significant technical features and advantages:
Large angle compensation capability: It can compensate for angle deviations of 15-25 degrees, far exceeding the compensation capability of general couplings.
Long distance transmission: The length of the intermediate shaft can be customized according to needs, suitable for transmission systems with large shaft spacing.
High torque transmission: Using high-strength materials and optimized design, it can transmit up to tens of thousands of Newton meters of torque.
Vibration damping performance: It can effectively absorb and reduce vibration and impact loads in the transmission system.
Easy maintenance: Most models adopt maintenance free design or only require regular lubrication.
Long service life: High quality materials and precision machining ensure long-term reliable operation.
Flexible installation: can adapt to various complex installation conditions and space limitations.
Long universal joint couplings are widely used in the following industrial fields:
Steel metallurgy industry: used for transmission systems of heavy equipment such as rolling mills, straightening machines, and continuous casting machines.
Mining machinery: applied to mining equipment such as ball mills, crushers, and conveying equipment.
Shipbuilding industry: used for connecting the shaft systems of ship propulsion systems and compensating for shaft deviations caused by hull deformation.
Petrochemical industry: suitable for power transmission of large compressors and pumps.
Wind power industry: used for connecting the gearbox and generator in wind turbines.
Construction machinery: widely used in equipment such as excavators and cranes.
Paper making machinery: a multi roll transmission system used for large paper machines.
As a key component in industrial transmission systems, the performance and reliability of long universal joint couplings directly affect the operational efficiency of the entire equipment. With the development of industrial equipment towards large-scale and high-efficiency, the technical requirements for long universal joint couplings are constantly increasing. Proper selection, installation, and maintenance of long universal joint couplings can not only ensure smooth operation of equipment, but also significantly extend its service life and reduce maintenance costs.
