2026/05/26
Replacing bearing housings in a double roller press granulator requires strict adherence to safety regulations and assembly standards to prevent issues such as abnormal noise, overheating, oil leaks, and premature bearing wear, ensuring stable equipment operation.
Before operation, the power supply to the equipment must be disconnected and warning signs posted to prevent accidental start-up. The work area must be cleaned beforehand to ensure it is dust-free and free of debris. Verify the model and specifications of the new bearing housing and ensure it is matched with original factory parts. Before disassembly, mark the alignment positions of the bearing housing and frame to ensure reassembly accuracy. Loosen bolts diagonally in stages; brute force on one side is strictly prohibited to prevent housing deformation. For heavy bearing housings, hydraulic pullers or low-temperature heating should be used for disassembly. Directly striking the housing and journal with a hammer is prohibited to avoid damage to components.
Before installation, thoroughly clean the journal and bearing housing holes with a cleaning agent to remove oil, burrs, and impurities. For interference fit components, use uniform heating at 80-100℃ for assembly; open flame heating is prohibited. Install according to the original markings, strictly calibrating coaxiality. Tighten the fixing bolts diagonally and evenly in stages to prevent uneven load distribution.
During assembly, inspect oil seals, O-rings, and other seals. Replace any damaged parts. Ensure the sealing lip faces inwards towards the bearing to prevent dust ingress and grease leakage. Fill the bearing cavity with dedicated lithium-based grease, controlling the grease level to one-third to one-half full to avoid overheating from excessive grease or dry friction from insufficient grease.
After installation, manually rotate the shaft to ensure it rotates freely without jamming or abnormal noise. Perform a 30-minute no-load test run, monitoring bearing temperature and vibration for any abnormalities before gradually increasing load for production. Regularly check bolt torque and lubrication status to extend the service life of the fertilizer produciton machine.
