As a key fluid transmission component in industrial equipment, the use details of Dubolin rotary joints directly affect their performance and service life. The following are core usage standards extracted from multiple dimensions:
Preliminary preparation and installation foundation
1. System cleaning: Before installation, it is necessary to clean the rotating joint drum and the inside of the pipeline. If necessary, a filter should be added to intercept impurities and prevent foreign objects from wearing the sealing surface. If the new equipment is running, it is recommended to blow away residual particles with high-pressure gas.
2. Concentricity calibration: During installation, it is necessary to ensure that the height of the rotating joint coincides with the equipment axis. If the deviation is too large, it will lead to increased swinging and local friction during operation, shortening the life of the seal. It can be adjusted with the assistance of a laser alignment instrument.
Key links in mechanical connection
1. Thread matching principle: The thread connection model should be strictly designed according to the rotation direction of the drum, and the rotation direction of the inner and outer pipe threads must be consistent, otherwise it may cause leakage or jamming. Before installation, manual pre tightening should be performed to verify the correctness of the rotation direction.
2. Flexible connection scheme: A metal hose connection must be used between the rotary joint and the pipeline, and rigid docking is prohibited. Flexible hoses can compensate for equipment vibration and thermal expansion and contraction differences, reducing joint loads. Priority should be given to directly connecting hoses at the entrance and exit to reduce additional stress caused by bending.
Structural coordination and support system
1. Inner tube assembly standard: It is recommended to use H8/E7 tolerance grade for the fit between the inner tube and the joint of the internal rotary joint, which ensures a tight fit and avoids interference jamming. Heavy duty applications require the addition of auxiliary support frames to share the weight.
2. Design of anti rotation mechanism: The diameter of the support rod should be less than the anti rotation hole by about 2mm, leaving appropriate clearance to allow for free adjustment and compensation. This design can absorb small deviations during device operation.
Key points of operation and maintenance management
1. Lubrication cycle management: Connectors with oil injection devices need to be regularly injected with specialized lubricating grease to maintain the reliability of bearing operation. Long term disused equipment should be cleaned and re oiled before restarting.
2. Temperature control strategy: When transporting high-temperature media, the temperature should be slowly increased to avoid thermal stress deformation caused by sudden changes. A small amount of exudation during the initial start-up is a normal phenomenon, and it will disappear on its own after stabilization.
Operation taboos and exception handling
1. Prohibited items: It is strictly prohibited to operate beyond the speed, pressure, temperature, and medium range; Avoid long-term idling; Prevent foreign objects from entering the interior of the joint.
2. Abnormal monitoring: Regularly check the wear condition of the sealing surface (normal wear amount is 5-10mm). If three intermittent scratches or abrasions are found, they should be replaced immediately. The drainage pipe should always be installed facing downwards to avoid liquid accumulation and corrosion.
The performance of Dubolin rotary joints depends on installation accuracy and maintenance standards. By strictly implementing the above details, the stability of equipment operation can be significantly improved and the service life can be extended. Special requirements for different application scenarios (such as high-speed and high-pressure environments) require additional consultation with the manufacturer's technical parameters.