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The primary classification of bearings and their functional analysis
Source: China Bearing Network Time: 2018-07-14
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Sliding bearings are usually used in high speed, high precision or unique heavy load. However, sliding bearings are not convenient for mass production; they are not convenient to order; and they are expensive; so they are not as widely used as rolling bearings.
Rolling bearings generally include the following types: deep groove ball bearings, angular touch ball bearings, cylindrical roller bearings, needle bearings, tapered roller bearings, angular touch thrust ball bearings, needle thrust bearings, spherical roller thrust bearings, Self-aligning ball bearings, spherical roller bearings, thrust ball bearings, cylindrical roller thrust bearings, tapered roller thrust bearings, roller bearings Y-bearings, etc.; there are some other bearings.
The enterprises that need a large amount of bearings mainly have metallurgy; electric power; mines; machinery; petroleum; coal; railways; papermaking; and many other aspects; there are several more common local engines, reducers, fans and other machines. Just turn the local; you can use the bearings.
Today, the world's largest bearing manufacturers are Sweden SKF (medium and large metallurgical mine bearings, automotive bearings), Japan NSK (small low noise bearings); NTN (automotive constant velocity joint bearings, medium ball bearings); KOYO ( Automotive Bearing); NBM (Office Active Miniature Bearing); NACHI (Small and Medium Ball Bearing); German FAG (Medium and Large Conical Cylindrical Roller Bearing); INA (Needle Bearing and Hydraulic Plunger); American TIMKEN (Inch Tapered Roller) Sub-bearings; Torrington (fine ball bearings, heavy-duty mechanical spherical roller bearings), etc. So far; the world's top ranked is SKF; the second is FAG; the third is TIMKEN.
Some tumbling bearing functions analyze the most representative tumbling bearings of deep groove ball bearings; widely used for radial load and bidirectional axial load. Suitable for high speed rotation and low noise, low oscillation. Steel plate dust cover or rubber seal The sealed bearing of the ring is pre-filled with an excess of smooth grease outer ring bearing with snap ring or flange; that is, simple axial positioning; and the maximum load type bearing in the outer casing is the same as the standard bearing; There is a filling groove in the outer ring; the number of balls is increased; the additional load is added. The first applicable frame: steel plate stamping frame (waveform, crown shape...single row, S shape...double row)
Copper alloy or phenolic resin cutting and holding frame, the main component of resin forming and holding frame: automobile: rear wheel, transmission, electrical equipment components, electrical: general-purpose electric motor, household appliances, other: exterior, internal combustion engine, construction machinery, railway vehicles, loading and unloading transfer machinery , agricultural machinery, various industrial machinery angle touch ball bearing ring and the ball have a touch angle; the standard touch angle is 15 °, 30 ° and 40 ° the greater the touch angle, the greater the axial load, the smaller the touch angle The more favorable the high-speed rotating single-row bearing can accept the radial load and the one-way axial load DB combination, the DF combination and the double-row bearing can accept the radial load and the bidirectional axial load DT combination for the one-way axial load is large; High-speed ACH-type bearings have a small ball diameter and a large number of balls. Most of them are used for machine tool spindle angular touch ball bearings. They are suitable for high-speed and high-precision rotary layout. The two single-row angular touch ball bearings are combined on the reverse side. Inner ring and outer ring; Acceptable radial load and bidirectional axial load No-fill groove bearing Also sealed Type of primary applicable support frame: Steel plate stamping bracket ( ... single shaped, S-shaped, the crown-shaped double row ...)
The main use of copper alloy or phenolic resin cutting frame and resin forming holder: single row: machine tool spindle, high frequency motor, gas turbine, centrifugal separator, small car front wheel, differential pinion shaft double row: oil pump, Roots blowers, air compressors, various transmissions, fuel injection pumps, printing machinery four-point ball bearings can accept radial loads and bidirectional axial loads. Single bearings can replace the front or reverse combination of angular touch ball bearings for acceptance A component load with a large axial load or axial load component can form a touch angle (α) between the bearings and the axial load in any direction; thus the ferrule and the ball are always on either touch line. Point touch first applicable support frame: copper alloy cutting and holding frame primary use: aircraft jet engine, gas turbine self-aligning ball bearing because the outer ring raceway surface is spherical; with self-aligning function; thus can actively adjust the shaft or shell The deflection or the different core causes the axial misaligned conical hole bearing to be easily machined on the shaft. : daisy...12,13,22...2RS, 23...2RS
Sunflower shape...22,23
Woodworking machinery, textile machinery drive shaft, vertical belt bearing, cylindrical roller bearing, cylindrical roller and raceway are line touch; radial load can be large; that is suitable for receiving heavy load and impact load; also suitable for high speed rotation N-type and NU-type can be moved axially; can be used to change the relative orientation of the shaft and the shell due to thermal expansion or equipment error; the optimum operation is used as a one-way axial load that can be accepted to a certain extent by the NJ type and NF type of the free end bearing; NH type and NUP type can accept a certain degree of bidirectional axial load inner ring or outer ring can be separated; easy to install and disassemble NNU type and NN type anti-radial load rigidity; mostly used for machine tool spindles Stamping and holding frame (Z-shaped), copper alloy cutting and holding frame, pin-type holding frame, and resin molding forming frame for primary use: medium and large-sized motors, generators, internal combustion engines, gas turbines, machine tool spindles, gear reduction equipment, loading and unloading transfer machinery All kinds of industrial mechanical solid needle roller bearings have the same layout of inner ring bearings as NU type cylindrical roller bearings; but because of the choice of needle roller; the volume can be reduced.晌 谌χ岢 谌χ岢 鲜 鲜 鲜 鲜 群 群 群 群 群 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂Wheels, hoists, bridge cranes, compressors, lack of additional load on individual bearings. High-speed ACH-type bearings have small ball diameters and many balls. Most of them are used for machine tool spindle angular touch ball bearings for high-speed and high-precision rotary layout. The two single-row angular touch ball bearings combined for the reverse side share the inner and outer rings; the radial load and the two-way axial load are accepted. The non-filled groove bearing also has a sealed type. The first applicable frame: the steel plate stamping frame (bowl shape... single row) , S shape, crown shape... double column)
The main use of copper alloy or phenolic resin cutting frame and resin forming holder: single row: machine tool spindle, high frequency motor, gas turbine, centrifugal separator, small car front wheel, differential pinion shaft double row: oil pump, Roots blowers, air compressors, various transmissions, fuel injection pumps, printing machinery four-point ball bearings can accept radial loads and bidirectional axial loads. Single bearings can replace the front or reverse combination of angular touch ball bearings for acceptance A component load with a large axial load or axial load component can form a touch angle (α) between the bearings and the axial load in any direction; thus the ferrule and the ball are always on either touch line. Point touch first applicable support frame: copper alloy cutting and holding frame primary use: aircraft jet engine, gas turbine self-aligning ball bearing because the outer ring raceway surface is spherical; with self-aligning function; thus can actively adjust the shaft or shell The deflection or the different core causes the axial misaligned conical hole bearing to be easily machined on the shaft. : daisy...12,13,22...2RS, 23...2RS
Sunflower shape...22,23
Woodworking machinery, textile machinery drive shaft, vertical belt bearing, cylindrical roller bearing, cylindrical roller and raceway are line touch; radial load can be large; that is suitable for receiving heavy load and impact load; also suitable for high speed rotation N-type and NU-type can be moved axially; can be used to change the relative orientation of the shaft and the shell due to thermal expansion or equipment error; the optimum operation is used as a one-way axial load that can be accepted to a certain extent by the NJ type and NF type of the free end bearing; NH type and NUP type can accept a certain degree of bidirectional axial load inner ring or outer ring can be separated; easy to install and disassemble NNU type and NN type anti-radial load rigidity; mostly used for machine tool spindles Stamping and holding frame (Z-shaped), copper alloy cutting and holding frame, pin-type holding frame, and resin molding forming frame for primary use: medium and large-sized motors, generators, internal combustion engines, gas turbines, machine tool spindles, gear reduction equipment, loading and unloading transfer machinery All kinds of industrial mechanical solid needle roller bearings have the same layout of inner ring bearings as NU type cylindrical roller bearings; but because of the choice of needle roller; the volume can be reduced.晌 谌χ岢 谌χ岢 鲜 鲜 鲜 鲜 群 群 群 群 群 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂 媸褂Wheel, hoist, bridge crane, compressor tapered roller bearing This type of bearing is equipped with a circular table-shaped roller; the roller is guided by the large rib of the inner ring to make the inner ring raceway surface, the outer ring raceway surface and the roller The point of each conical surface of the sub-rolling surface intersects the bearing on the middle line of the bearing, and the single-row bearing can accept radial load and one-way axial load; the double-row bearing can accept radial load and bidirectional axial load for accepting heavy load and The impact load is different according to the touch chest (α); it is divided into three types: small cone angle, middle cone angle and large cone angle; the larger the touch angle, the larger the axial load can be. The outer ring and the inner component (inner ring and roll) The sub-supporting frame assembly can be separated from each other; it is easy to assemble and disassemble. The bearing code "J" or "JR" has the world interchangeability. This type of bearing also uses the British series products. The first applicable frame: steel plate stamping frame, Composition of resin forming holder, pin type holder Primary use: Automobile: front wheel, rear wheel, transmission, differential pinion shaft. Machine tool spindle, construction machinery, large agricultural machinery, railway vehicle gear reduction equipment, rolling mill roll neck and reduction gear spherical roller bearing The 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 of R, RH, RHA and SR because the middle of the arc of the outer raceway and the middle of the bearing Common; has a self-aligning function; thus, it can actively adjust the axial load caused by the deflection or different core of the shaft or the casing to accept the radial load and the biaxial axial load. The unique radial load can be large; Load and Impact Loads Tapered bore bearings can be used in the following two types of taper holes on the shaft (taper) by using fasteners or withdrawal sleeves:
1:30 (auxiliary code: K30)...Applicable to 240,241 series 1:12 (auxiliary code: K).........Applicable to other series of outer ring can open oil hole, oil groove and positioning pin hole (1). The inner ring can also be equipped with oil holes and oil grooves. The first applicable support frame: copper alloy cutting and holding frame, steel plate stamping and holding frame, pin-type holding frame, and resin molding forming frame. The primary use: paper making machinery, speed reducing equipment, railway vehicle axle , rolling mill gear box seat, rolling mill roller table, crusher, oscillating screen, printing machinery, woodworking machinery, various industrial speed reducers, vertical belt aligning bearing thrust ball bearings from washer-shaped raceway with raceway The ring and the ball and the frame assembly constitute a raceway ring that cooperates with the shaft. The raceway ring cooperates with the outer casing to be used as a raceway. The two-way bearing will cooperate with the one-way bearing of the middle ring. Load; two-way bearing can accept two-way axial load (both can not accept radial load)
The first applicable adherence frame: steel plate stamping frame, copper alloy or phenolic resin cutting frame, the main component of the resin forming frame: car steering pin, machine tool spindle thrust cylindrical roller bearing by washer-shaped raceway ring (shaft ring, The seat ring) is composed of a cylindrical roller and a bracket assembly. The cylindrical roller is convexly machined; therefore, the pressure between the roller and the raceway surface is evenly distributed to accept a one-way axial load, and the axial load can be large; the axial rigidity is also The most applicable adherence frame: the main use of copper alloy cutting and sticking frame: oil drilling rig, steel making steel mechanical thrust needle roller bearing, separate bearing consists of raceway ring and needle roller and holding frame assembly; can be thin with stamping Raceway ring (W) or cut thick raceway ring (WS) The combination of non-detachable bearings is a single type of bearing that consists of a finely stamped raceway ring and needle roller and holder assembly. The axial load of this type of bearing occupies space. Xinyu file 舸 舸 æ“ æ“ mostly use only needle roller and support frame components; and the shaft and outer casing of the equipment surface as the raceway surface application of the first applicable frame: steel plate punch Persistence, composition of resin forming the main use of the frame: variable speed equipment tapered roller bearings for automobiles, cultivators, machine tools, etc. This type of bearing is equipped with a truncated roller (large end is spherical); the roller is made of a raceway (shaft ring) , the seat ring) the ribs accurately guide the one-way bearing that can make the one-way bearing of the shaft ring and the raceway surface of the raceway and the roller surface of the roller tumbling surface intersect on the middle line of the bearing to accept the one-way axial load; The bearing can accept the bidirectional axial load bidirectional bearing to cooperate with the shaft in the middle ring; however, because the clearance is used for cooperation; therefore, the axial positioning of the middle ring must be used with the bushing, etc. The first applicable bracket: the copper alloy cutting bracket is the primary use: single To: crane hook, oil rig rotary ring two-way: rolling mill roller neck thrust spherical roller bearing This type of bearing spherical roller is placed obliquely; because the raceway surface is spherical; with a self-aligning function; thus can be promised The shaft has a number of skewed axial loads to be very large; it is generally preferred to use oil smoothing when accepting axial loads and accepting several radial loads. The first applicable bracket: copper alloy cutting bracket At use: hydro, vertical motors, boats with propeller shafts, rolling mill rolling screw reducer, tower cranes, coal grinding machine, an extruder, a molding machine
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