Analysis of the Principle and Application of Self-Lubricating Bearings
Source: China Bearing Network | Date: February 3, 2013
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[Daily Bearing Network] Most bearings used in mechanical systems are still ball or roller types. However, self-lubricating bearings have gained popularity due to their advantages such as wear resistance, low friction, and cost-effectiveness. These bearings are becoming a preferred choice in many industries. Below are some key features and benefits of self-lubricating bearings:
1. **Oil-Free or Low-Oil Operation**: Ideal for hard-to-reach areas or locations where re-lubrication is difficult. They require minimal maintenance during operation.
2. **Excellent Wear Resistance**: The friction coefficient is low, which helps reduce wear and extend service life.
3. **High Elasticity and Plasticity**: This allows the bearing to distribute stress over a larger contact area, enhancing load capacity.
4. **Low Static Friction Coefficient**: Helps eliminate stiction at low speeds, ensuring smooth motion and precise machine operation.
5. **Reduced Vibration and Noise**: Improves working conditions by minimizing noise and vibration, contributing to a cleaner environment.
6. **Formation of a Lubricating Film**: During operation, a lubricating film forms, protecting the shaft from damage and preventing seizure.
7. **Low Hardness Requirement for Shaft**: The shaft does not need to be hardened or tempered, simplifying the manufacturing process of related components.
8. **Thin-Wall Design and Lightweight**: Reduces the overall size of the mechanical system, making it more compact and efficient.
9. **Versatile Surface Treatment**: The steel backing can be electroplated with various metals, allowing use in corrosive environments. Common applications include printing presses, textile machines, tobacco equipment, micro-motors, automobiles, motorcycles, and agricultural machinery.
**Analysis of the Clearance in Self-Lubricating Bearings**
1. **Strong Load Capacity**: Offers excellent wear resistance even under heavy loads.
2. **Suitable for Low-Speed Rotational and Oscillatory Motion**: Works well in high-load, low-speed environments where fluid lubrication is not easily formed.
3. **Long-Term Protection Without Oil**: In dry conditions, these bearings can operate for extended periods without oil, and the lubricant layer significantly increases service life.
4. **Flexible Manufacturing Process**: The outer plastic layer allows for some machining tolerance during production, enabling fine adjustments after installation for better fit.
5. **Widespread Use**: Commonly applied in automotive chassis, metallurgical machinery, mining equipment, hydraulic systems, construction tools, and agricultural machinery.
**JDB Solid-Inlaid Bearing Series**
The JDB solid-inlaid bearing series is a versatile base product suitable for both high and low-pressure environments, as well as extreme temperatures. It works well with oil, water, or no lubrication. The base material is high-strength brass, offering double the hardness of standard bronze bushings and more than twice the wear resistance.
It is widely used in light and heavy industrial machinery, including continuous casting machines, rolling mills, injection molding machines, paper machines, mold guide columns, ships, and machine tools.
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Piston Seals
Piston seal is a kind of seal used to seal between piston and cylinder, usually used in hydraulic system and Pressure system. The piston seal can prevent liquid and gas leakage, and also prevent external impurities from entering the system, thus maintaining the normal operation of the system.
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