What are the components of the bearing, and what are the components of the rolling bearing?

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The rolling bearing consists of four parts: the outer ring, the inner ring, the rolling element and the cage. To put it simply, as long as there is an outer ring, an inner ring, and a rolling element, it can be defined as a rolling bearing. According to the shape of the rolling elements, rolling bearings are divided into two categories: ball bearings and roller bearings.

Strictly speaking, it is composed of six parts: outer ring, inner ring, rolling element, cage, seal and lubricating oil.

Bearing is an important component in contemporary machinery and equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. According to the different friction properties of moving elements, bearings can be divided into two categories: rolling bearings and sliding bearings.

Among them, rolling bearings have been standardized and serialized, but compared with sliding bearings, its radial size, vibration and noise are larger, and the highest is also higher.

The structure of the rolling bearing is composed of: outer ring, inner ring, rolling element, cage composed of lubricant (lubricant is also considered to be the fifth largest part of the rolling bearing).

1. Concept:

Rolling bearing is a precision mechanical component that changes the sliding friction between the running shaft and the shaft seat into rolling friction, thereby reducing friction loss.

Second, the structure. Rolling Bearing The structure of a rolling bearing is made up of parts.

1.Outer ring - installed in the housing bore, generally does not rotate.

2.Inner ring – mounted on the journal and rotates with the shaft.

3.Rolling elements – the core elements of rolling bearings.

4.Cage – Evenly spaced out the rolling elements to avoid friction.

Lubricant is also considered to be the fifth largest part of rolling bearings, which mainly plays the role of lubrication, cooling, cleaning and so on.

3. Role. Support the rotating shaft and the parts on the shaft, and maintain the normal working position and rotation accuracy of the shaft, the rolling bearing is easy to use and maintain, reliable to work, good starting performance, and has a high bearing capacity at moderate speed. Compared with plain bearings, rolling bearings have larger radial dimensions, poor vibration damping ability, lower life at high speeds, and larger sound.

Due to the different uses and working conditions, the structure of rolling bearings varies a lot, but the basic structure is composed of four parts: inner ring, outer ring, rolling element (steel ball or roller) and cage. (1) Inner ring (also known as inner sleeve or inner ring). Usually fixed to the journal, the inner ring rotates with the shaft.

There are grooves on the outer surface of the inner ring for the steel balls or rollers to roll, which are called inner grooves or inner raceways. (2) Outer ring (also known as coat or outer ring). It is usually fixed on the bearing seat or the housing of the machine and plays the role of supporting the rolling elements.

There are also grooves on the inner surface of the outer ring for the steel balls or rollers to roll, which are called inner grooves or inner raceways. (3) Rolling elements (steel balls or rollers). Each set of bearings is equipped with one or several sets of rolling elements, which are installed between the inner ring and the outer ring, and play the role of rolling each transmission force.

Rolling elements are load-bearing parts, and their shape, size and number determine the load-bearing capacity and the performance of each high-speed operation. (4) Cage (also known as retainer or isolator). The rolling elements in the bearing are evenly separated from each other so that each rolling element rolls normally between the inner and outer rings.

In addition, the cage has the functions of guiding the movement of the rolling elements, improving the lubrication conditions inside the bearing, and preventing the rolling elements from falling off. In thrust bearings, the ring that fits with the shaft is called the shaft ring, and the ring that fits with the bearing seat or machine housing is called the seat ring, and the shaft ring and the housing ring are collectively referred to as washers. In addition to the above four parts, there are other parts that match the bearings of various structures.

For example, rivets, dust caps, seals, stop gaskets, retaining rings and adapter sleeves.

Common bearing classification and selection methods, rolling bearing composition and application.

The structure of a rolling bearing is generally composed of four parts: (inner ring), (outer ring), (rolling element), and (cage).

The rolling bearing is generally composed of four parts: the inner ring, the outer ring, the rolling element and the cage, and the function of the inner ring is to cooperate with the shaft and rotate together with the shaft; The function of the outer ring is to cooperate with the bearing seat and play a supporting role.

The rolling element is evenly distributed between the inner ring and the outer ring with the help of the cage, and its shape, size and number directly affect the performance and life of the rolling bearing; The cage can evenly distribute the rolling elements and guide the rolling elements to rotate for lubrication.

Bearings are composed of inner rings, outer rings, rolling elements, cages, and grease.

1. The inner ring usually fits tightly with the shaft and rotates with the shaft.

2. The outer ring is usually matched with the bearing housing hole or the housing of mechanical parts to play a supporting role. However, in some applications, there are also outer rings that rotate, inner rings that are fixed, or both inner and outer rings that rotate.

3. The rolling elements are evenly arranged between the inner ring and the outer ring with the help of the cage. Its shape, size and number directly affect the bearing capacity and service performance.

4. The cage evenly separates the rolling elements, guides the rolling elements to move on the correct track, and improves the internal load distribution and lubrication performance of the bearing.

5. It is used for the friction part of the machine, which plays the role of lubrication and sealing. It is also used on metal surfaces to fill voids and prevent rust.

The basic structure of the bearing: inner ring, outer ring, rolling element, cage.

Bearings are divided into the following according to the type of rolling element:

1. Ball bearings - rolling elements are balls, such as: deep groove ball bearings, self-aligning ball bearings, angular contact ball bearings, and outer spherical bearings.

2. Cylindrical roller bearings - the rolling elements are cylindrical rollers, such as: cylindrical roller bearings, reasoning cylindrical roller bearings, roller bearings, and tandem bearings.

3. Drum roller bearing - The rolling element is a drum roller, such as a spherical roller bearing.

4. Tapered roller bearings - the rolling elements are tapered rollers, such as: tapered roller bearings, thrust tapered roller bearings.

5. Rolling silver needle bearing - the rolling element is a needle roller, and the ratio of the length to the diameter of the needle is greater than 3, but the diameter is less than or equal to 5mm.

Cage. A bearing cage is a bearing part that partially encloses and moves all or part of the rolling elements in order to isolate the rolling elements, and usually to guide and hold them in the bearing.

The main use of the cage is to seep the boring way:

1. Separate the rolling elements to reduce the frictional heat generated by the bearing.

2. Evenly spaced the rolling elements to optimize the load distribution.

3. Guide the rolling elements in the no-load zone of the bearing.

The main types of cages are:

1. Stamped metal cage.

Stamped metal cages (sheet steel or brass sheets) are lightweight and can withstand high temperatures.

2. Machined metal cage.

Machined metal cages are made of brass, steel, or light alloys. It can withstand high speeds, high temperatures, high acceleration and high vibrations.