Spherical Roller Bearings 22222CA/W33 3522

Self-aligning roller bearings have double-row rollers, outer ring has a common spherical raceway, inner ring has 2 raceways, and relative to the bearing at an angle. This ingenious structure makes it self-aligning, so it is not easily affected by the angle error of shaft and bearing box seat or shaft bending, suitable for installation error or shaft bending caused by angle error. In addition to the bearing can withstand radial load, but also can withstand two-way, the use of the axial load.

The inner bore of self-aligning Roller bearing is cylindrical and conical, and the taper of the conical bore is 1:30 and 1:12. The tapered inner bore bearing can be adjusted by fitting a set sleeve or a back sleeve, the core ball bearing is conveniently and quickly assembled on the optical shaft or the stepped shaft.

The self-aligning roller bearing has a double row of rollers, and the outer ring has a common spherical raceway, and the inner ring has two raceways and is inclined to an Angle relative to the bearing axis. This ingenious structure makes it has automatic self-aligning performance, so it is not easy to be affected by the Angle between the shaft and the bearing box seat on the error or shaft bending, suitable for the occasion of Angle error caused by the installation error or shaft deflection. The bearing can bear radial load as well as axial load for bidirectional use. The inner hole of self-aligning roller bearing has two kinds of cylindrical and conical, and the conical cone hole taper is 1:30 and 1:12. The conical inner hole bearing is equipped with a set sleeve or a release sleeve, so that the conical inner hole self-aligning ball bearing can be conveniently and quickly assembled on the optical shaft or step machine shaft. The models of self-aligning roller bearings are: self-aligning roller bearings (20000CC type); Taper hole self-aligning roller shaft bearing (20000CCK type); Self-aligning roller bearing (20000CC/W33 model); Tapered hole self-aligning roller bearing (20000CCK/W33 model); Self-aligning roller bearing mounted on the set sleeve (20000CCK H type); There are 6 kinds of self-aligning roller bearings (20000CCK/W33 H type) mounted on the set sleeve.

Self-aligning roller bearings have two rows of rollers, the main bearing radial load, but also can bear any direction of the axial load. It has high radial load capacity, especially suitable for working under heavy load or vibration load, but can not bear pure axial load. The raceway of the outer ring of the bearing is spherical in shape, so its centering performance is good and the coaxiality error can be compensated. There are two rows of symmetrical spherical rollers, the outer ring has a common spherical raceway, and the inner ring has two raceways inclined at an angle to the bearing axis, which have good self-aligning performance, the self-aligning ability varies with bearing size series. Generally, the permissible self-aligning angle is 1 ~ 2.5 degrees. This type of bearing has larger load capacity and can bear axial load in both directions besides radial load, with a better impact resistance, in general, self-aligning roller bearings allowed to work at a lower speed. Self-aligning roller bearings are divided into symmetrical spherical roller and asymmetrical spherical roller according to the shape of the roller cross-section. Asymmetrical self-aligning roller bearings are early products, mainly for the maintenance service of the main engine, in the new design of the main engine, the symmetrical self-aligning roller bearing is seldom used. The internal structure has been improved and the parameters optimized, and it can bear more axial load than the earlier self-aligning roller bearing, this kind of bearing can be divided into C type and CA type according to the inner ring with or without rib and the cage used, type C bearings are characterized by an inner ring without ribs and by the use of pressed steel cage. Type CA trane bearings are characterized by both sides of the inner ring having ribs and by the use of solid cage. To improve the lubrication of bearings, spherical roller bearings with annular oil grooves and three oil holes on the outer ring are available to the user, as indicated by the bearing rear code/W33. Self-aligning roller bearings with inner ring oil holes are also available according to customer's requirements. In order to facilitate loading and unloading of bearings, self-aligning roller bearings with tapered bore are also available. The taper of taper bore is 1:12, in order to meet the requirements of special users, bearings with 1:30 taper of inner bore can also be provided, and the post code is K30. Bearings with tapered bore may be mounted directly on a tapered journal by means of a locking nut, or on a cylindrical journal by means of a tightening or stripping sleeve. In order to ensure that the bearing in high-speed operation to prevent the centrifugal effect between the raceway and roller harmful slip, bearing should bear a certain minimum radial load, the size can be estimated as follows: Fr = 0.02C type: N Equivalent Dynamic Load P = Fr + Y1FA when Fa/fr e p = 0.67Fr + Y2FA when Fa/fr e Type: P fo = 1 Y2F equivalent dynamic load ny1y2f equivalent static load P0 = Fr + Y0FA type: p0f equivalent static load ny0f

Self-aligning roller bearings are divided into: cylindrical bore, conical bore. Tapered bore bore with 1:12 tapered roller bearings (type 153000 or type 113000) and 1:30 tapered roller bearings (type K30) . When matched with a tapered shaft, the inner ring can be moved along the axial direction to adjust the radial clearance of the bearing. The post-codenamed K, K30 tapered bore self-aligning roller bearings are mounted on matching tight fitting sleeves to become the post-codenamed k + H and K30 + h bearings. The bearing can be mounted on an optical shaft without a shaft shoulder and is suitable for situations requiring frequent mounting and dismounting of the bearing. In order to improve the lubrication performance of the bearing, an annular oil groove is arranged on the outer ring of the bearing and three evenly distributed oil holes are drilled. The Post Code is W33

The main purpose of the cage: Stamping Steel Reinforced Cage (suffix E, Few in China) . Pressed Steel Plate Cage (SUFFIX CC) , glass fiber reinforced polyamide 66 cage (suffix TVPB) , machined brass two-piece cage (suffix MB) . Machined brass integral cage (suffix CA) , vibration stamping plate cage (suffix JPA) . Brass cage for vibration (suffix EMA). Same structure, the code name on the bearing may be different. Main uses: Paper Machine, reducer, railway vehicle axle, rolling mill gearbox bearing block, rolling mill roller, crusher, vibration screen, printing machinery, woodworking machinery, all kinds of industrial reducer, vertical belt seat self-aligning bearing. [2] install self-aligning roller bearings between the inner ring with two raceways and the outer ring with a spherical raceway. The curvature center of the raceway surface of the outer ring is the same as the center of the bearing, so it has the same centering function as the self-aligning ball bearing. In the shaft, the case of Flexure, can automatically adjust the load and two directions of the axial load. Radial load capacity, suitable for heavy load, impact load situation. Bearing with taper bore bore bore bore inner ring for direct mounting. Or use the tight set sleeve, remove the cylinder installed in the cylindrical shaft. The cage uses the steel plate pressing cage, the polyamide forming cage and the copper alloy turning cage. For self-aligning bearings, use the middle mounting ring to prevent the outer ring from tilting and rotating when mounting the bearing with shaft into the housing shaft hole. It should be remembered that some dimensions of self-aligning ball bearings have ball bearings that protrude from the side of the bearing, so the middle mounting ring should be recessed to prevent damage to the ball bearings. A large number of bearings are generally installed by mechanical or hydraulic pressure method. [3] for separable bearings, the inner and outer rings can be installed separately, which simplifies the installation process, especially when both inner and Outer Rings require an interference fit. When mounting the shaft with the inner ring in place into the bearing box with the outer ring, care must be taken to see that the inner and outer rings are properly aligned to avoid scratching the bearing raceway and rolling parts. If cylindrical and needle roller bearings have an inner ring without flanged flanges or an inner ring with flanged edges on one side, the mounting sleeve is recommended. The outer diameter of the sleeve shall be equal to the diameter F of the inner ring raceway, and the machining tolerance shall be d10. Needle Roller Bearings with pressed outer ring are best mounted with Mandrel. Clearance for the installation of self-aligning roller bearings axial clearance, can be used on the journal Adjustment Nut, adjustment gasket and bearing bore thread, or preload spring methods such as adjustment. The axial clearance is related to the arrangement of bearings, the distance between bearings and the material of bearings and housings, and can be determined according to the working conditions. For self-aligning roller bearings with high load and high speed, the effect of temperature rise on axial clearance must be considered when adjusting clearance, and the reduction of clearance caused by temperature rise should be taken into account. For Low speed and vibration bearing, should be adopted no clearance installation, or apply pre-load installation. Its purpose is to make the roller and raceway of self-aligning roller bearing have good contact, load uniform distribution, to prevent the roller and raceway from being damaged by vibration and impact. After adjustment, the axial clearance is checked by dial indicator. The method is to fix the dial gauge on the machine body or the bearing base first, make the dial gauge contact head against the smooth surface of the shaft, push the shaft left and right along the axis, the maximum swing of the needle is the axial clearance value.

Note the problem self-aligning Roller Bearing pre-tightening force is carried out at room temperature, but in the working state, the system micro-tensile temperature rise caused by the drive shaft, bearing pre-tightening force will change, therefore, the pre-tightening force set, that should be taken into account. It requires the ability to set the size, speed, and other conditions for reasonable use of self-aligning roller bearing preload to ensure transmission of life. If the pre-tightening force is too large, power consumption, or even lead to overheating. If the PRELOAD is too small, the body load, shaft rolling, and the outer ring gap between the effect of the jump, run, transmission accuracy to reduce the noise increase, affect the gear meshing, serious damage when teeth and bearings. According to the different self-aligning roller bearing assembly, such as: Direct axial compression of the inner ring of the bearing pre-tightening nut rotation, the inner and outer ring to eliminate the gap, to achieve the purpose of bearing pre-tightening force. ACHIEVE CO-USE: First, go far beyond the pre-loaded bearing, nut the last, then back to 1/4 turn. This assembly method has the advantages of low investment, simplicity, practicality, and good quality consistent with the conic roller bearings under the premise that it can be used. 1. The electric heating plate method, the bearing placed in the temperature of 100 °C electric heating plate a few minutes, this method is the most simple, such as turning several times can make the bearing heat uniform, but also high efficiency, size adjustable roller bearings can use this method. 2. Electric furnace heating method, will be placed in a closed automatic temperature control furnace heating, heating uniform, accurate temperature control, heating fast, suitable for a lot of heating bearings occasions. 3. Induction heating method, the use of induction heater can be quickly, reliably and cleanly self-aligning roller bearing heating to the required temperature, which is especially suitable for the occasion of inner ring tight fit, because the heating is only the inner ring, and the outer ring is rarely heated, this makes it easier to mount on the shaft and into the seat hole. 4. In the heating method of electric bulb, the 50W electric bulb is used to heat the self-aligning roller bearing to ensure the heating temperature is about 100 °C, the smaller bearing can be placed directly on the bulb, the larger bearing can be placed in the cone-shaped cover of the bulb, and the cone-shaped cover can prevent the heat loss of the bulb, and make heating uniform cone cover up and down can be adjusted, in a certain range can adapt to heating different sizes of bearings if the use of far-infrared Bulbs, note that the direction of the bulb should be downward, in order to avoid infrared ray harmful to people's eyes this kind of bulb can energy-saving lamp heating method is suitable for a small number of not often needed; to the bearing heating occasion, usually the bulb can also be used for lighting, in addition to do not need any other equipment. 5. Oil Tank heating method, this is the traditional heating method which is widely used, the oil tank distance bottom 50 ~ 70 mm place sets the metal net, the bearing is placed on the net, the big bearing must use the hook to hoist the bearing not to be placed directly in the trough bottom, in order to prevent the bearing parts at the bottom of the contact tank from overheating, or tank bottom sediment into the bearing tank heating method of the attention of the following points, should use non-corrosive thermal stability of good mineral oil, preferably transformer oil, oil and containers should be kept clean tank capacity should be heated with the self-aligning roller bearing size and oil, if the container is too small, in continuous operation, a bearing oil temperature will soon drop, the effect is not good