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Features of spherical plain bearings

Features of spherical plain bearings
Features of spherical plain bearings

The structure of the spherical plain bearing is simpler than that of the rolling bearing, which is mainly composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface. Joint bearings are generally used for low-speed swinging motion (ie angular motion). Since the sliding surface is spherical, it can also perform tilting motion (ie self-aligning motion) within a certain angle range. When the degree is large, it can still work normally.

Features

Spherical bearings can withstand large loads. According to its different types and structures, it can bear radial load, axial load or combined radial and axial load at the same time. Since the outer spherical surface of the inner ring is inlaid with composite materials, the bearing can produce self-lubrication during operation. It is generally used for low-speed swing motion and low-speed rotation. It can also be used for tilting motion within a certain angle range. When the misalignment between the support shaft and the shaft housing hole is large, it can still work normally. Self-lubricating spherical plain bearings are used in water conservancy, professional machinery and other industries.

application
Self-lubricating spherical plain bearings
Spherical bearings are widely used in engineering hydraulic cylinders, forging machine tools, engineering machinery, automation equipment, automotive shock absorbers, water conservancy machinery and other industries. The spherical plain bearing is a spherical sliding bearing, and the basic type is composed of inner and outer rings with spherical sliding spherical contact surfaces. Depending on its structure and type, it can bear radial load, axial load, or combined radial and axial loads at the same time.
Because the spherical sliding contact area of ​​the spherical plain bearing is large and the inclination angle is large, and because most of the spherical plain bearings adopt special processing methods, such as surface phosphating, galvanizing, chrome plating or outer sliding surface lining, padding, spraying, etc., Therefore, it has a large load capacity and impact resistance, and has the characteristics of corrosion resistance, wear resistance, self-alignment, good lubrication or self-lubricating without lubrication and dirt pollution, and can work normally even if the installation is misplaced. Therefore, spherical plain bearings are widely used for low-speed oscillating motion, tilting motion and rotational motion.

composition

The spherical plain bearing is mainly composed of an outer ring and an inner ring. The inner spherical surface of the outer ring and the outer spherical surface of the inner ring form a rolling friction pair.

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Installation method of Deep Groove Ball Bearing

Installation method I of Deep Groove Ball Bearing: press fit: the inner ring of the bearing is tightly matched with the shaft. When the outer ring is loosely matched with the bearing seat hole, press the bearing onto the shaft with a press machine, and then install the shaft and the bearing into the bearing seat hole together. When pressing, pad an assembly sleeve made of soft metal material (copper or soft steel) on the end face of the bearing inner ring. The outer ring of the bearing is tightly matched with the bearing seat hole. When the inner ring is loosely matched with the shaft, The bearing can be pressed into the bearing seat hole first, and the outer diameter of the assembly sleeve should be slightly smaller than the diameter of the seat hole. If the bearing ring is tightly matched with the shaft and seat hole, the installation of the inner and outer rings should simultaneously press into the shaft and seat hole. The structure of the assembly sleeve should be able to simultaneously press the end faces of the bearing inner and outer rings.

How to choose the type of bearing

There are also relevant introductions on how to choose the brand and type of bearings, but some common sense about bearings that are more biased, or are often ignored or ignored, often play a very important role in the use of bearings. Learn about it.

Features of spherical plain bearings

The structure of the spherical plain bearing is simpler than that of the rolling bearing, which is mainly composed of an inner ring with an outer spherical surface and an outer ring with an inner spherical surface. Joint bearings are generally used for low-speed swinging motion (ie angular motion). Since the sliding surface is spherical, it can also perform tilting motion (ie self-aligning motion) within a certain angle range. When the degree is large, it can still work normally.

Explanation of self-aligning ball bearings

The bearing is equipped with spherical balls between the inner ring of the two raceways and the outer ring of the spherical surface of the raceway. The outer diameter of the self-aligning functional bearing and the inner diameter of the bearing seat are spherical cooperation, and there is an active self-aligning function between the two, which can compensate for the misalignment of the axes caused by the device error and the deformation of the bottom surface of the device. The material of the cage is steel plate, synthetic resin, etc.

Precautions for the use of deep groove ball bearings

For deep groove ball bearings, the bearing load is too small during operation, which will cause sliding between the ball and the raceway, which will become the cause of scratches. This is especially true for large deep groove ball bearings with heavy ball and cage weights. In many cases, bearings will corrode. There are many reasons for bearing corrosion. The most common factors in our daily life are the following:

How deep groove ball bearings work

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