Hollow Shaft and Rolling Bearing Equipment
Source: Bearing Network | Time: 2014-03-12
Industrial fine grinding mills often use rolling bearings, which have been widely adopted in China. These systems offer significant benefits such as energy savings, improved production efficiency, reduced lubricant consumption, lower maintenance costs, and less environmental pollution. However, some manufacturers still imitate outdated methods when choosing rolling mill equipment, leading to various inefficiencies and potential long-term disadvantages. The traditional method of installing rolling bearings on hollow shafts involves machining the inner diameter of the bearing to fit the hollow shaft. The bearing is then thermally installed, with the outer ring placed inside a top sleeve, which is bolted to the hollow shaft and secured in place. During operation, bolts may loosen, causing misalignment between the top sleeve and the hollow shaft. Dust can then enter the gap and reach the bearing housing, contaminating the lubricant and potentially damaging the bearing. To address these issues, a new and improved installation method has been developed after years of research and practical application. This modern approach offers several advantages: 1. **Improved Lubrication**: Thin oil is used instead of grease, reducing friction and enhancing energy efficiency. 2. **Temperature Control**: The thickened diameter of the hollow shaft allows for better heat dissipation, keeping the bearing temperature below 60°C and extending its lifespan. 3. **Easy Maintenance**: An oil level indicator is installed on the bearing housing, allowing operators to monitor and replenish oil as needed, preventing damage from insufficient lubrication. 4. **Dust Protection**: The removal of the outer sleeve prevents dust from entering the bearing housing, ensuring cleaner operation and longer service life. 5. **Structural Enhancements**: A flange is added to both the hollow shaft and the spiral cylinder, improving alignment and stability. Additionally, the increased diameter of the bearing enhances the sealing effect and improves oil retention. This innovative method not only improves the performance and reliability of the equipment but also reduces downtime and maintenance costs, making it a more efficient solution for industrial applications.
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