The bearing is a component that fixes and reduces the friction coefficient of the load during the mechanical transmission process. It can also be said that when other mechanical parts move relative to each other on the shaft, they are used to reduce the friction coefficient during power transmission and keep the shaft center position fixed. Bearings are an essential part of contemporary machinery and equipment. Its primary function is to support the mechanical rotating body to reduce the mechanical load friction coefficient of the material during transmission. The bearings produced by Wuxi Spark Bearing Co., Ltd can be divided into rolling bearings and sliding bearings according to the different frictional properties of moving elements.
Needle bearing
The needle bearing is equipped with thin and long rollers (the length of the roller is 3 ~ 10 times the diameter, and the width is generally not more than 5mm), so the radial structure is compact, and the inner diameter size and load capacity are the same as other types of bearings The diameter is the smallest, especially suitable for the support structure with limited radial installation size. Needle roller bearings can be used without inner ring bearings or needle roller and cage assemblies according to the use occasions. At this time, the journal surface and housing matching the bearing The whole surface is directly used as the inner and outer rolling surfaces of the bearing. In order to ensure the load capacity and running performance of the bearing with the ring, the hardness of the surface of the shaft or shell hole raceway, the machining accuracy and surface quality should be the same as the bearing ring. Purpose The combined needle roller bearing is a bearing unit composed of a radial needle roller bearing and a thrust bearing component. Its compact structure, small volume, and high rotation accuracy can withstand a specific axial load while taking a high radial load. And the product structure is in various forms, wide adaptability, and easy to install. Combined needle roller bearings are widely used in various mechanical equipment such as machine tools, metallurgical machinery, textile machinery, and printing machinery, and can make the mechanical system design very compact and smart.
Self-aligning ball bearings
Self-aligning ball bearings: bearings with drum-shaped rollers between the inner rings of the two raceways and the outer rings with spherical raceways. The center of curvature of the raceway surface of the outer ring is consistent with the center of the bearing, so it has the same self-aligning function as the self-aligning ball bearing. When the shaft and casing deflect, it can be adjusted automatically without increasing the bearing burden. Spherical roller bearings can withstand radial loads and axial loads in two directions. Self-aligning ball bearings have a large radial load capacity and are suitable for heavy loads and impact loads. The inner diameter of the inner ring is a tapered bore bearing, which can be installed directly. Or use an adapter sleeve and a dismounting cylinder to fit on the cylindrical shaft. The cage is made of steel plate stamping cage and polyamide. Self-aligning ball bearings are suitable for bearing heavy and shock loads, precision instruments, low-noise motors, automobiles, motorcycles, metallurgy, rolling mills, mining, petroleum, paper, cement, and squeezing. Sugar and other industries and general machinery.
Deep groove ball bearing
The imported bearings of deep groove ball bearings are mainly used to bear pure radial load, and can also carry radial load and axial load at the same time. When it only takes the absolute radial load, the contact angle is zero. When the deep groove ball bearing has an ample radial clearance, it has the performance of an angular contact bearing and can withstand a large axial load. The friction coefficient of deep groove ball bearings is minimal, and the limit speed is also very high. Especially under high-speed operating conditions with large axial loads, deep groove ball bearings are more advantageous than thrust ball bearings. Deep groove ball bearings are the most representative rolling bearings with a wide range of uses.
Structurally, each ring of a deep groove ball bearing has a continuous groove raceway with a cross-section of approximately one-third of the equatorial circumference of the ball. Deep groove ball bearings are mainly used to bear radial loads, and can also take sure axial loads. When the radial clearance of the bearing increases, it has the properties of angular contact ball bearings and can withstand axial loads that alternate in two directions. Compared with other bearings of the same size, this type of bearing has a small friction coefficient, high limit speed, and high accuracy. It is the preferred bearing type when the user selects the type. The deep groove ball bearing has a simple structure and is easy to use. It is a type of imported bearing with the most significant production volume and the most extensive application range.
It is suitable for high speed or even very high-speed operation, and it is very durable and does not require frequent maintenance. This type of bearing has a low friction coefficient, high limit speed, simple structure, low manufacturing cost, and easy to achieve high manufacturing accuracy. The size range and form are varied. It is used in precision instruments, low-noise motors, automobiles, motorcycles, and general machinery. It is the most widely used type of bearing in the machinery industry. Mainly carry a radial load, can also take a certain amount of axial load. Deep groove ball bearings can be used in gearboxes, instruments, motors, household appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, construction machinery.
The axial load capacity increases when a more massive radial clearance is selected, and the contact angle is zero when subjected to pure radial forces. When an axial force acts, the contact angle is more significant than zero. Generally, stamped wave-shaped cages, solid cages made by vehicles, and sometimes nylon frames are also used.
After the deep groove ball bearing is mounted on the shaft, the axial displacement of the rod or the housing can be limited within the axial clearance range of the bearing so that it can be axially positioned in both directions. In addition, this type of bearing also has a certain degree of self-aligning ability. It can still work usually when it is inclined by 2 ′ to 10 ′ relatives to the housing hole, but it has a particular impact on the bearing life. Deep-groove ball bearing cages are mostly steel stamping wave-shaped cages, and large-scale bearings mostly use car-made metal solid cages.
Spherical roller bearing
Spherical roller bearings are bearings with drum rollers assembled between an inner ring with two raceways and an outer ring with spherical raceways.
Spherical roller bearings have two rows of rollers, which mainly bear a load of one diameter, and can also withstand axial loads in either direction. With high radial load capacity, it is especially suitable for work under heavy load or vibration load but can not bear pure axial load. The raceway of the outer ring of this type of bearing is spherical, so its self-aligning performance is excellent, and it can compensate for the coaxiality error.
Spherical roller bearings have two rows of symmetrical spherical rollers, the outer ring has a standard spherical raceway, and the inner circle has two raceways inclined at an angle to the bearing axis. It has excellent self-aligning performance when the shaft is stressed. The bearing can still be used frequently when it is bent or installed with different centers. The self-alignment varies with the bearing size series. Generally, the allowable self-aligning angle is 1 ~ 2.5 degrees. The outer bearing can also withstand the axial load in both directions and has excellent impact resistance. Generally speaking, the working speed allowed for the spherical roller bearing is lower.
Spherical roller bearings are divided into symmetrical spherical rollers and asymmetrical spherical rollers according to the cross-sectional shape of the rollers. Asymmetrical spherical roller bearings are new products, mainly for the maintenance service of the host, and the unique design of the host Symmetrical spherical roller bearings are rarely used. The internal structure has been comprehensively improved in design and parameter optimization. Compared with the earlier produced spherical roller bearings, it can withstand higher axial loads. The operating temperature of such bearings is lower, so it can adapt to the requirements of more top speed. According to the presence or absence of ribs in the inner ring and the cage used, it can be divided into C type and CA type. The characteristics of the C type bearing are that the inner circle has no ribs and uses steel plates. Stamping cages, the attributes of the CA-type bearings are that there are ribs on both sides of the inner ring and the use of a car-made solid pen. In order to improve the lubrication of the bearing, the user can provide the outer ring with an annular oil groove and three oil holes. Spherical roller bearings are indicated by the bearing postcode / W33. Spherical roller bearings with oil holes in the inner ring can also be supplied according to user requirements. In order to facilitate the customer's assembly and disassembly and replacement of the bearings, tapers with hidden holes are also available Spherical roller bearing, the taper of the taper hole is 1:12, and the postcode is K. In order to meet the requirements of individual users, bearings with a taper of 1:30 can also be provided, and the postcode is K30. The bearing can be installed directly on the tapered journal with a lock nut, or it can be installed on a cylindrical journal with the help of an adapter sleeve or a withdrawal sleeve.
