Cranes

In the industrial field, cranes are an important mechanical equipment widely used in material handling, loading and unloading, and transportation. As a device that can lift heavy objects, cranes play an irreplaceable role in fields such as logistics, construction, and chemical engineering. This article will provide a detailed introduction to the basic concepts, types, structures, working principles, and usage precautions of cranes, helping readers better understand and understand cranes.

A crane is a mechanical device that can lift heavy objects. It usually consists of lifting devices such as hooks, grab buckets, electromagnets, and operating mechanisms, metal structures, electrical systems, etc. The main function of a crane is to lift and move materials from one place to another, which can greatly improve logistics efficiency and productivity.

With the development of the economy and technological progress, the application of cranes bearing in various industrial fields is becoming increasingly widespread. As an important component of a crane, the quality and performance of bearings have a crucial impact on the operation and safety of the crane. This article will provide a detailed introduction to the characteristics and applications of crane bearings. 

Characteristics of Crane Bearings  

Crane bearings mainly include tapered roller bearings, self-aligning roller bearings, and cylindrical roller bearings thrust ball bearings. 

1. Tapered roller bearing

Tapered roller bearing is a common type of crane bearing that has the ability to withstand large radial and axial loads. This type of bearing has a conical raceway between the inner and outer rings, where the rollers roll and can withstand small impacts and vibrations.

2. Self aligning roller bearing

Self aligning roller bearings have good self aligning performance and are suitable for installation on different shafts to withstand combined radial and axial loads. The inner ring of this type of bearing has two raceways, and the outer ring has one raceway. The rollers roll in the raceway and can withstand combined radial and axial loads.

3. Cylindrical roller bearing

Cylindrical roller bearings are a common type of crane bearing suitable for bearing large radial loads. This type of bearing has one raceway on the inner ring and two raceways on the outer ring. The rollers roll in the raceway and can withstand radial force and negative ball load bearing.

4. Thrust ball bearing

Thrust ball bearing is a common type of crane bearing that is suitable for bearing small axial loads. The inner ring of this type of bearing has a raceway, the outer ring has a raceway, and a cage, which is equipped with steel balls. The rollers roll in the raceway and can withstand axial loads load.

Application of Crane Bearings

1. Application of cylindrical roller bearings

Cylindrical roller bearings are mainly used in cranes to withstand radial loads, therefore they are often used to withstand the pressure generated by heavy objects. For example, in bridge cranes, cylindrical roller bearings are installed on the large wheels and drum to support the entire bridge and lifting weight, as well as the radial force generated by supporting the lifting steel wire rope on the output shaft, small wheels, and drum of the reducer.

2. Application of tapered roller bearings

Tapered roller bearings are mainly used in cranes to bear the radial load and the normal axis is connected to bear the load. The pressure generated by the object and the axial force generated by the traction of the car. For example, in bridge cranes, tapered roller bearings are installed on the large wheels, the output shaft of the trolley gearbox, the drum, the support seat of the trolley motor, and other parts to support the entire bridge and hoist the heavy and decelerated box diameter to the output shaft and the axial force generated by the traction of the supporting trolley.

3. Application of self-aligning roller bearings

Self aligning roller bearings are mainly used in cranes to bear radial and axial loads due to their normal coupling. Bear the pressure generated by heavy objects and the axial force generated by trolley traction. For example, in the gantry crane, the self-aligning roller bearing is installed on the trolley frame to support the whole trolley frame and the output shaft of the trolley reduction box to support the radial force generated by the lifting load and the axial force generated by the trolley traction.

4. Application of thrust ball bearings 

Thrust ball bearings mainly bear axial loads in cranes. Therefore, it is often used to withstand the axial force generated by the traction of small cars. For example, in a gantry crane, thrust ball bearings are installed on the trolley frame to support the axial force generated by the lifting load on the trolley frame and the output shaft of the trolley gearbox.

Maintenance and upkeep of crane bearings

1. Regularly check the lubrication status of bearings to ensure good lubrication and avoid bearing wear and damage caused by insufficient lubrication.

2. For bearings in use, they should be regularly checked for wear on their rollers and raceways, and bearings with severe wear should be replaced in a timely manner. 

3. During use, it is necessary to avoid the shaft being subjected to shock and vibration to reduce bearing damage.

4. For bearings that are not frequently used, they should be rotated regularly to prevent them from getting stuck. 

5. During maintenance and upkeep, it is important to keep the bearings clean to avoid bearing contamination.

In summary, the quality and performance of crane bearings have a crucial impact on the operation and safety of the crane. Therefore, it is necessary to strengthen the maintenance and upkeep of bearings to ensure their normal operation and service life.

Crane Bearing supplier

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