Why are bearing gears widely used in many fields?

Nov 01, 2024

As key components in mechanical transmission, bearing gears are widely used in various industrial equipment and daily necessities. They not only improve the operating efficiency of the machinery but also ensure the stability and durability of the equipment.

Basic knowledge and uses of bearings

Bearings are components that support rotating bodies and reduce friction and wear during their movement. They are mainly composed of inner rings, outer rings, rolling elements and cages. According to the force direction and structural characteristics, bearings can be divided into several categories based on their load direction, such as radial bearings, thrust bearings and radial thrust bearings.

1. Classification of bearings

Radial bearings: mainly bear radial loads, such as deep groove ball bearings and cylindrical roller bearings. Deep groove ball bearings are widely used in gearboxes, motors, household appliances and other fields because of their simple structure and easy maintenance. Cylindrical roller bearings are commonly used in heavy equipment such as large and medium-sized motors, locomotives and vehicles because of their strong load-bearing capacity.

Thrust bearings mainly bear axial loads, such as thrust ball bearings and thrust cylindrical roller bearings. Thrust ball bearings are suitable for occasions with low speed and only need to bear unidirectional axial load, such as crane hooks, instant water pumps, etc. Thrust cylindrical roller bearings are widely used in heavy machine tools, high-power marine gearboxes and other equipment due to their large axial load capacity.

Centrifugal thrust bearings: Bear radial and axial loads at the same time, such as spherical roller bearings, tapered roller bearings, etc. Spherical roller bearings are widely used in heavy load and impact load occasions such as metallurgy, rolling mills, and mines because they can automatically adjust the axis misalignment. Tapered roller bearings are widely used in automobiles, rolling mills production lines, mines and other industries because of their compact structure and strong load capacity.

2. Uses of bearings

Bearings are widely used, covering almost all mechanical equipment that requires rotational motion. Their main functions include:

Reduce friction and wear:

• Convert sliding friction into rolling friction through rolling elements.

• Significantly reduce friction and wear between moving parts.

• Improve mechanical efficiency and service life.

Support and positioning: Provide stable support for the rotating body to ensure that it rotates in the correct position and direction to prevent damage caused by offset or vibration.

Transmitting force and torque: In rotational motion, bearings also play the role of transmitting force and torque to ensure that the mechanical system can operate normally.

3. Basic knowledge and uses of gears

Gears are mechanical elements used to transmit motion and power, mainly composed of gear hubs, tooth surfaces and wheel rims. Gears transmit power through the meshing between tooth surfaces. Their transmission efficiency and service life depend on factors such as tooth shape, meshing quality and materials.

3.1. Classification of gears

Cylindrical gears: used for transmission between two parallel shafts, such as gears in automobile gearboxes.

Bevel gears: used for transmission between two intersecting shafts, such as gears in automobile rear axle differentials.

Worm gears: used for transmission between two intersecting shafts, with large transmission ratios and self-locking functions, and are often used in reduction gears.

3.2. Uses of gears

Gears are extremely versatile, covering almost all mechanical equipment that requires power transmission and speed regulation. Their main functions include:

Transmitting power and speed: through the meshing between gears, power is transmitted from one shaft to another, and its speed and direction are changed.

Changing the transmission ratio: Through the combination of gears with different numbers of teeth, the transmission ratio can be adjusted to meet the power requirements under different working conditions.

Realizing special functions: For example, the gear set in the differential can ensure that the wheels on both sides rotate at different speeds when turning, improving the driving stability of the car.

4. Specific application examples of bearing gears

4.1. Automobile industry

In the automotive industry, bearings and gears are used everywhere. The radial bearings, such as crankshaft bearings and connecting rod bearings in the engine, are used to support the rotation of the crankshaft and connecting rod and reduce friction and wear. The cylindrical gears and bevel gears in the gearbox realize the transmission of power and speed regulation through meshing. In addition, the bearings in the car tires also play the role of supporting the tires and have the function of making them rotate smoothly.

4.2. Engineering machinery

In the field of engineering machinery, bearings and gears also play an important role. The bearings in heavy machinery such as excavators and loaders need to withstand huge radial and axial loads to ensure the stable operation of the equipment under harsh working conditions. The gears in the gearbox, transmission shaft and other components achieve power transmission and speed regulation through precise meshing, ensuring that the machine can operate according to the predetermined trajectory and speed.

4.3. Aerospace

In the field of aerospace, the application requirements of bearings and gears are more stringent. The bearings in the aircraft engine need to withstand the harsh environment of high temperature, high pressure and high-speed rotation while ensuring extremely low friction and wear. The gears in the transmission system need to have extremely high precision and reliability to ensure the stability and safety of the aircraft during flight.

4.4. Daily life

In addition to the industrial field, bearings and gears are also widely used in our daily life. Motor bearings and fan bearings in household appliances provide us with a convenient life experience. The gear and chain transmission systems in vehicles such as bicycles and electric vehicles allow us to shuttle in the city easily.

In summary, bearings and gears are key components in mechanical transmission, and their uses are wide and important. They not only improve the operating efficiency and service life of the machinery but also ensure the stability and reliability of the equipment. With the continuous development and progress of science and technology, the technology of bearings and gears will continue to innovate and improve, bringing more convenience and benefits to our lives and work.