The QY3D630-35.5-IIP hardened gear reducer for cranes is suitable for various operating mechanisms of cranes, such as lifting equipment for port machinery, shipyard cranes, gantry cranes in steel plants, and other heavy-duty lifting equipment, with a large lifting load.

Performance characteristics:

1. Gears are made of low-carbon alloy steel, carburized, and quenched, with a gear accuracy of grade 6.

2. High precision, high efficiency, smooth transmission, low noise, smaller size and lighter weight compared to quenched and tempered gear reducers, with high load capacity and reliability.

3. Welded housing structure, installation forms include three-point mounting and foot mounting.

4. Output shaft types: flat key, involute spline, gear shaft end, and hollow shaft.

5. Generally uses oil bath lubrication and natural cooling; vertical reducers use circulating oil lubrication.

6. Equipped with rolling bearings.

7. Horizontal installation uses oil bath splash lubrication and natural lubrication. Lubricating oil options include L-CKC100, L-CKC150, or L-CKC220. When the ambient temperature is below 0°C, users should have a lubricating oil heating device.

Hardened gear reducers are a crucial component in transmission products and a very important part of the entire transmission system. However, during prolonged or overloaded use, the equipment may experience some abnormal issues that can affect overall performance and production efficiency. It is essential to detect potential problems in the reducer from small details in daily use, conduct timely inspections, and resolve issues to prevent more significant problems or even impact production.

1. Abnormal, uniform operating noise: If it is a rolling or grinding noise, it may be due to damaged bearings that need replacement; if it is a knocking noise, it may be due to uneven meshing, and the lubricating oil should be checked.

2. Abnormal, uneven operating noise: It may be due to impurities in the lubricating oil. The lubricating oil should be checked.

3. Abnormal noise in a fixed area: Check if the gearbox fasteners are loose. Inspect the fasteners and use the specified ones.

4. Operating temperature too high: Check if the lubricating oil is excessive or has aged and deteriorated, or if there are many impurities; for gearboxes with cooling fans, if the housing surface is too dirty, clean the housing and the cooling fan air intake; check if the cooling system is faulty.

5. Temperature too high at the bearing position: Check if the lubricating oil is excessive or has aged and deteriorated; check if the lubrication pump is damaged or the bearings are damaged. If the hardened gear reducer is found to be damaged, it should be replaced promptly.

6. Lubricating oil leakage: It may be due to loose connections of the gearbox, loose fasteners, incorrect installation of sealing components, damaged sealing components, loose connections, excessive lubricating oil level, or installation errors. Check connection bolts and tighten them if loose; inspect sealing components and replace them if necessary; check the oil level and improve ventilation.