Sliding bearing seat

For sliding bearing seats, the selection of materials is more cautious. As sliding bearing seats mainly bear pressure, they should be able to meet and be suitable for the working requirements of sliding bearing seats. Gray cast iron, ball milled cast iron, or cast steel can be selected, but considering the overall situation, gray cast iron is better because it has good wear resistance, good liquid flowability, low solidification shrinkage, high compressive strength, good shock absorption, sufficient lightness and rigidity during use, and is reasonably priced. Therefore, gray cast iron parts are selected. In gray cast iron, HT200 is commonly used as the casting material for sliding bearing seats due to its excellent performance and ease of processing and casting.

When producing sliding bearing seats, attention should be paid to:

1. Castings are not allowed to have cracks and other defects that do not affect strength and appearance. The price of sliding bearing seats is allowed to exist within the following range.

2. The material of the bearing seat is made of HT200 gray cast iron or ZG200~ZG400 cast steel, and its mechanical properties should comply with the provisions of GB9439 or GB11352.

3. The molding sand on the casting should be cleaned thoroughly, and the sprues, risers, scars, and sand inclusions should be removed or polished off. After cleaning, the surface of the blank should be flat and smooth.

feature

Strong bearing capacity: It operates well under high-speed and heavy load conditions. When using liquid friction sliding bearings, the internal friction force in the fluid replaces the friction force on the metal surface, which can effectively avoid wear and prolong the service life. It is suitable for equipment such as rolling mills, hydro generators, etc. that can withstand huge impact and vibration loads or extremely heavy loads.

High operating accuracy: stable operation, no noise, can ensure precise support position. When the liquid friction bearing is designed reasonably and used correctly, it can achieve high rotational accuracy. It is commonly used in equipment such as precision grinders that require particularly precise support position for shafts.

Good buffering and damping: The oil film on the working surface of liquid friction sliding bearings has the functions of vibration reduction, buffering, and noise reduction, which can effectively absorb vibration and reduce impact. It is suitable for occasions such as automotive engines that require buffering of vibration and impact.

Small radial size: suitable for situations where the shaft is densely packed or the diameter of shaft type rotating parts is small, it has advantages when the radial size is limited, such as multi roll rolling mills and other equipment.

There are various structural forms, including integral, sectional, and self-aligning structures. The integral structure is simple and cost-effective, but the clearance cannot be adjusted after the shaft sleeve wears out, making it inconvenient to assemble and disassemble. It is suitable for low-speed, light load, or intermittent mechanical work; Split type assembly and disassembly are convenient, and it is easy to adjust the bearing clearance after bearing wear, making it widely used; The self-aligning type can adapt to the deformation of the shaft, ensure good contact between the shaft neck and the bearing shell, and is used in situations where the shaft neck is long, the main shaft stiffness is small, or the two bearings are difficult to align.

application field

In the industrial field, it is widely used in metallurgy, mining, transportation systems, environmental protection equipment and other industrial scenarios. For example, rolling mills in the metallurgical industry require sliding bearing seats to withstand enormous rolling forces and impact loads; Sliding bearing seats are also commonly used in crushers and conveyor systems in mines to adapt to harsh working environments and heavy load requirements.

In the field of electric power, sliding bearing seats are used to support rotors, reduce friction and wear, and ensure smooth operation of equipment such as water turbines and generator sets in hydropower stations. The hydroelectric generator of the Three Gorges Dam adopts high-performance sliding bearing seats for its rotor bearings to ensure long-term stable operation under enormous hydraulic forces.

In the field of transportation, sliding bearing seats are used in the traction motors and bearings of railway locomotives, which can work well under high-speed and heavy load conditions, ensuring the safe operation of trains. In addition, sliding bearing seats are also used in the crankshaft bearings and other parts of some car engines to improve the performance and reliability of the engine.

In the field of mechanical processing, high-precision machining equipment such as precision grinders and boring machines require extremely high precision for shaft support. The high precision and stability of sliding bearing seats can meet the needs of these equipment and ensure machining accuracy.