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Structure and working principle of deep groove ball bearings

Deep groove ball bearings are one of the most common types of rolling bearings.

The basic deep groove ball bearing consists of an outer ring, an inner ring, a set of steel balls and a set of cages. There are two types of deep groove ball bearings: single row and double row. The deep groove ball structure is also divided into a sealed structure and an open structure. The open type is a bearing without a sealed structure. Sealed deep groove balls are divided into dust-proof seals and oil-proof seals.

The material of the dust-proof sealing cover is stamped steel plate, just to prevent dust from entering the bearing raceway. The oil-proof type is a contact oil seal, which can effectively prevent the grease in the bearing from overflowing.

The model code of single row deep groove ball bearing is 6, and the model code of double row deep groove ball bearing is 4. Its structure is simple, easy to use, and it is the most commonly produced and widely used type of bearing.

1. Deep groove ball bearings

1.1 Bearing structure

Compared with other types, deep groove ball bearings have simple structure and high manufacturing precision. Therefore, it is easy to mass-produce in large quantities, and the manufacturing cost is also low, so it is widely used. In addition to the basic type, deep groove ball bearings also have various structural variants, such as deep groove ball bearings with dust cover, deep groove ball bearings with rubber seals, deep groove ball bearings with stop grooves, deep groove ball bearings Bearings with ball slots for high load capacity, double row deep groove ball bearings.

1.2 Working principle

Deep groove ball bearings mainly bear radial loads, and can also bear radial loads and axial loads at the same time. When only bearing radial load, the contact angle is zero. When the deep groove ball bearing has a large radial clearance and has the performance of an angular contact bearing, it can withstand a large axial load. The friction coefficient of deep groove ball bearings is very small, and the limit speed is also high.

2. Brief description of the advantages of deep groove ball bearings

2.1 General conditions, rolling bearing efficiency and hydrodynamic lubricated bearing equivalent, but higher than mixed lubricated bearings.

2.2 The radial clearance is relatively small, and the pre-tightening force can be used to eliminate the clearance of the center angular contact bearing, and the running accuracy is high.

2.3 For the same shaft diameter, the width of bending bearing and sliding bearing is smaller. It can make the axial structure of the machine fit closely.

2.4 Most rolling bearings can bear radial and axial loads at the same time, so the bearing combination structure is simple.

2.5 Consume less lubricant, easy to seal and easy to maintain.

2.6 No need to use non-ferrous metals.

2.7 High degree of standardization, mass production, low cost.

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