Introduction to the functions and uses of various types of bearings

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Introduction to the functions and uses of various types of bearings

Source: China Bearing Network Time: 2013-04-29
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"rolling bearing"
The most representative roll bearing; a wide range of uses; can accept radial load and two-way axial load.
Suitable for high-speed rotation and low-noise, low-oscillation applications. Sealed bearings with steel dust caps or rubber seals are pre-filled with excess smooth grease; bearings with snap rings or flanges on the outer ring; Orientation; it is also convenient for the device inside the casing.
The maximum load type bearing has the same dimensions as the standard bearing; however, there is a filling groove in the inner and outer rings; the number of balls is added; the additional load is increased.
"Spherical ball bearings"
Spherical roller bearings are between the inner ring with two raceways and the outer ring with spherical races; bearings with drum rollers.
The middle of the curvature of the outer ring raceway surface is common with the bearing; therefore, it has the same self-aligning function as the active self-aligning ball bearing.
When the shaft and the casing are deflected; the load can be actively adjusted and the axial load in two directions.
Radial load can be large; suitable for heavy load and impact load conditions.
The inner diameter of the inner ring is the bearing of the tapered hole; it can be directly installed. Or the tightening sleeve can be used to disassemble the cylinder on the cylindrical shaft. The frame is adhered to the steel plate stamping frame, the polyamide forming frame and the copper alloy frame.
"needle bearing"
The basic layout of the solid needle bearing has the same inner ring bearing as the NU type cylindrical roller bearing; but because of the selection of the needle roller; the volume can be reduced. 15. The sand 惺艽缶 惺艽缶 蚋 晌 晌 晌 谌χ岢 谌χ岢 鲜 鲜The group of tortoises smashed the hustle and bustle.
Thrust needle roller bearings are made up of raceway rings and needle roller and holder components; they can be combined with thin stamped raceway (W) or cut thick raceway (WS).
The non-detachable bearing is an integral bearing consisting of a finely-rolled raceway ring and a needle roller and a bracket assembly. It can accept one-way axial load of this type of bearing. It takes up space. Only the needle roller and the holder assembly are used; and the shaft and the device surface of the housing are used as the raceway surface.
"Tapered Roller Bearings"
This type of bearing is equipped with a circular table-shaped roller; the roller is guided by the large rib of the inner ring. The poles of the conical surfaces of the inner ring raceway surface, the outer ring raceway surface and the roller tumbling surface are intersected on the bearing middle line. A little above.
Single row bearings can accept radial loads and one-way axial loads; double row bearings can accept radial loads and bidirectional axial loads; suitable for accepting heavy loads and shock loads.
"Cylindrical Roller Bearings"
According to the bearing, the number of rows of rolling elements is different; cylindrical roller bearings can be divided into single row, double row and multi row cylindrical roller bearings.
Among them, there are more single-row cylindrical roller bearings with a support frame. In addition, there are cylindrical roller bearings of other layouts such as single or double row full complement rollers.
Single row cylindrical roller bearings are classified into N type, NU type, NJ type, NF type and NUP type according to the different ferrule ribs. Cylindrical roller bearings can receive large radial load; according to the layout of the ferrule ribs It also accepts a certain one-way or two-way axial load.
NN type and NNU double row cylindrical roller bearings are compact in layout; strong in rigidity; large in carrying capacity; deformed after being loaded.
FC, FCD, FCDP four-row cylindrical roller bearings can accept large radial loads; they are mostly used in heavy machinery such as rolling mills.
"Spherical roller bearing"
This type of bearing is equipped with a spherical roller between the outer race of the spherical raceway and the inner race of the double raceway; it is different according to the internal layout; it is divided into four types: R, RH, RHA and SR.
Because the arc of the outer ring raceway is in common with the middle of the bearing; it has a self-aligning function; therefore, it can actively adjust the axial misalignment caused by the deflection of the shaft or the outer casing or the different core.
It can accept radial load and bidirectional axial load. Especially radial load can be large; suitable for accepting heavy load and impact load. Conical hole bearing can be assembled and disassembled on the shaft by using fasteners or withdrawal sleeve.
Spherical roller bearings can accept large radial loads; they can also accept a certain axial load. The outer ring raceways of this type of bearings are spherical in shape; therefore, they have a aligning function; when the shaft is subjected to bending or skewing, The middle line of the inner ring and the middle line of the outer ring are not inclined more than 1°~2. 5°; the bearing can still work.
"Thrust roller bearing"
1. Thrust roller bearings include thrust spherical roller bearings, thrust cylindrical roller bearings and thrust tapered roller bearings.
Thrust spherical roller bearings can accept axial and radial loads together; however, the radial load must not exceed 55% of the axial load. Another important feature of this type of bearing is the active centering function; thus making it different. The deflection of the heart and the axis is not very sensitive. It only needs to load P and P. Does not exceed 0. 05C; and the shaft rotates; the bearing promises a certain size of the centering angle. Small values ​​apply to large bearings; When you are big, you will be relieved.
"Spherical Bearings"
Spherical bearings are preferred for applications where equipment and components are required; for example, in agricultural machinery, transportation systems or construction machinery. Primarily for radial and axial combined loads with radial loads; usually not alone Accepts axial loads; such bearings can be separated from the inner ring of the device (with full set of rollers and holders) and the outer ring.
This type of bearing does not allow the shaft to be skewed relative to the housing; additional axial forces occur under radial load commissioning.
This kind of bearing axial clearance is big. The disaster is 岢 芊裾 ぷ鞴叵 ぷ鞴叵 ぷ鞴叵 ぷ鞴叵 艽螅 艽螅 艽螅 敝嵯蛴 敝嵯蛴 敝嵯蛴 敝嵯蛴 敝嵯蛴 敝嵯蛴 敝嵯蛴 督 督 督 督 督 督 督 督 督 督 督 督 督 督
Therefore, special attention should be paid to adjusting the axial clearance of the bearing during installation and operation; if necessary, the interference device can be pre-loaded; to increase the rigidity of the bearing.
"joint bearing"
The joint bearing is smooth and self-smooth. 2. The joint bearing is a special type of plain bearing.
Its layout is simpler than that of the rolling bearing; it is mainly composed of an outer ring with an inner spherical surface; it can accept a large load; it can be accepted according to the inner ring with an outer spherical surface and its different type and layout; Combined load to load, axial load or radial and axial together. (Editor: Imported Bearing)
It is usually used for low-speed rocking motion (that is, angular motion; it can also be used for skew motion (ie, spherical motion) within a certain viewpoint scale; because the sliding surface is spherical motion); the support shaft is not the same as the shaft hole When the degree is large; still can work normally.
"Linear Bearings"
Linear motion ball bearings are mainly used in linear reciprocating parts of mechanical equipment; they have the advantages of small conflict, sensitive motion and convenient replacement and replacement.
It is widely used in textile machinery, printing machinery, medical machinery, fine machine tools, electrical cutting machines and active recorders.
"Angle touch bearing"
Angular touch ball bearings; can accept radial load and axial load together; can also with pure axial load; high limit speed. The bearing can accept the axial load can be determined by the touch angle; the touch angle is large; The ability of the load is high.
"Pressure bearing"
The pressure bearing is a separate bearing; according to its layout, it is divided into one-way pressure ball and two-way pressure ball bearing.
One-way pressure bearings can accept axial loads in one direction; two-way pressure bearings can accept axial loads in two directions.
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