The role of deep groove ball bearings
作者:本站 来源:本站时间:2016/7/3 19:31:06
Deep groove ball bearing inner and outer ring raceway were tested arc-shaped groove, the channel is slightly larger than the radius of the sphere radius. Mainly used to bear radial load, but also bear certain axial load. When the bearing radial clearance increased, with angular contact ball bearings, can withstand large axial load, but also for high-speed rotation.
Deep groove ball bearing structure characteristics
Deep groove ball bearing inner and outer ring raceway were tested arc-shaped groove, the channel is slightly larger than the radius of the sphere radius. Mainly used to bear radial load, but also bear certain axial load. When the bearing radial clearance increased, with angular contact ball bearings, can withstand large axial load, but also for high-speed rotation. Bearings and tilted relative to the housing bore axis 8 'to 16', still work, but the impact of its service life. And should not be used in high speed thrust ball bearings in the case of such bearings can withstand pure axial load.
Deep groove ball bearings generally use steel stamping a two-part synthetic cage, but the size or speed bearing solid cage is used that cage with stamping cage, as guided by the ball, holding the high-speed deep groove ball bearings frame is usually guided by the inner or outer wall.
With the same size of other types of bearings, deep groove ball bearing friction coefficient is small, lower vibration and noise, extreme high speed, high precision, user selection of the preferred bearing type. However, these bearings the impact of intolerance, not suited to withstand heavy loads.
Deep groove ball bearing structure is simple, easy to use, is the largest production volume, most widely used range of a class of bearings. Widely used in automobiles, household appliances, machine tools, motors, pumps, agricultural machinery, textile machinery and many other areas. Its production accounts for over 70% of total output bearing, our country is the highest yield, the most common and least expensive type of bearings.
Deep groove ball bearings are bearing the most common type. The basic model consists of a deep groove ball bearing outer ring, an inner ring, a steel ball and a group of holding structure into. Deep groove ball bearing types have single and double row two types of single row deep groove ball bearing type code for 6, double row deep groove ball bearings, code-named 4. Its structure is simple, easy to use, is the production of the most common and most widely used class of bearings.
Deep groove ball bearings mainly take radial load, but also to support radial and axial load. When the only bear radial load, the contact angle is zero. When the deep groove ball bearings with a larger radial clearance, the performance with angular contact bearings can bear large axial load, deep groove ball bearing friction coefficient is small, speed is also high.
Deep groove ball bearing structure is simple, easy to reach compared with other types of manufacturing high precision, so easily into a series of mass production, and lower manufacturing costs, the use of very common. In addition to the basic type deep groove ball bearings, there are all kinds of variations of structures, such as: deep groove ball bearings with dust cover, with rubber ring of deep groove ball bearings with snap ring groove deep groove ball bearings, have installed ball gap large load capacity of deep groove ball bearings, double row deep groove ball bearings
Deep groove ball bearings can be used for transmission, instrumentation, motors, appliances, internal combustion engines, transportation vehicles, agricultural machinery, construction machinery, engineering machinery, and other yo-yo
Deep groove ball bearings in machinery mainly play a supportive role and reduce friction, so the precision deep groove ball bearings, so noise is directly related to the use of machinery and life. But often business people will always encounter some customers that the use of the best deep groove ball bearings or deep groove ball bearings imported its efficiency is not high, which is related to deep groove ball bearings with choice. Perhaps someone will say deep groove ball bearings that are used with select users, and I just what the user wants to sell me something. But as a qualified sales personnel in addition to proficiency in their product knowledge but also proficient in the use of the product, namely, a doctor-type sales, according to the user's performance ancillary products, conditions of use to select the best supporting deep groove ball bearings.
Because many types of wide range of deep groove ball bearings, the following will be mainly used for the most widely used deep groove ball deep groove ball bearings and choice for some analysis. Hope for deep groove ball bearing recognize fewer people can deepen their understanding of the deep groove ball bearing.
A deep groove ball bearing selection
1, deep groove ball bearing clearance selection: when purchasing deep groove ball bearings generally only informed what type, class, rarely have deep groove ball bearings clearance request, the business must ask groove conditions of use ball bearings, deep groove ball bearings which speed, temperature, tolerances are directly related to deep groove ball bearing clearance selection. Generally 3500 rev / min rotational speed of the motor they use CM clearance, such as high-speed motor requires a relatively large clearance. Deep groove ball bearing clearance after assembly because the inner cylindrical hole swollen and narrow and lead to a reduction, reducing the amount of clearance = interference × 60% (deep groove ball bearing is room except aluminum). For example, before the deep groove ball bearing assembly clearance is 0.01mm, assembly interference of 0.01mm, the clearance of deep groove ball bearings assembled to 0.004mm. In theory, deep groove ball bearings at zero clearance noise and life are to achieve the best state, but in actual operation, taking into account issues such as temperature, deep groove ball bearings in the assembly clearance is 0.002mm-0.004mm comparing it is good.
2, oil selection: fat choices are generally selected based on deep groove ball bearing speed, temperature, the starting torque and noise requirements, etc., requires business people to various oils performance very understanding.
3, deep groove ball bearing seal type selection: deep groove ball bearings can be divided into lubricating oil and grease lubrication. Oil lubrication Deep groove ball bearings are generally used form of deep groove ball bearings, grease lubricated deep groove ball bearings generally use shields or rubber seals seal. Dust cover for high temperature environment or good parts, seals and sub-contact seal non-contact seal two kinds of good contact seal dustproof performance but starting torque, non-contact seal starting torque is small, but sealing performance no contact is good.
Second, the deep groove ball bearings should Precautions
1, deep groove ball bearings and shaft tolerances room choice and control: The deep groove ball bearings pressed into the deep groove ball bearings should be flexible rotation no sense block. If significant rotation is not flexible, it means that the shaft size is too large, cut to tolerances. Such as deep groove ball bearing pressed into the shaft turned by hand after a significant rustle sense, it may be too much tolerance of the shaft or shaft roundness is not good. Therefore, when the control shaft and the good tolerance of deep groove ball bearings room should also control the roundness, many domestic manufacturers only the tolerance control, no control of roundness.
2, assembly methods deep groove ball bearings: deep groove ball bearings is because precision products, such as improper assembly is likely to cause damage to the deep groove ball bearing channel, resulting in deep groove ball bearing damage. Deep groove ball bearings in the assembly should have a dedicated mold and can not beat, when pressed into the shaft force only a small circle, the circle can only force when pressing circle. Assembly requires the use of pneumatic or hydraulic pressure, when the press-fit to the outer upper and lower mold in a horizontal state, if inclined groove ball bearings can cause damage due to power channel, leaving deep groove ball bearing guide ring.
3, the assembly to prevent foreign bodies: iron deep groove ball bearings can easily be generated when balancing pretending to do balancing the rotor when entering deep groove ball bearings inside, so it is best to do before loading balancing deep groove ball bearings . Some manufacturers in order to facilitate assembly, the assembly in indoor deep groove ball bearings coated with some oil or grease lubrication effect, but the operator is often difficult to control the amount, if oil or grease in the deep groove ball bearing interior accumulates more when deep groove ball bearings to rotate easily into the deep groove ball bearings inside along the axis. Deep groove ball bearing chamber is preferably not coated with oil or grease, such as non-coated have to control shall not be deep groove ball bearing indoor accumulates.
4, paint rust prevention: paint rust is characterized by multiple sealed-type motor, the motor assembly, sound good, but put in the warehouse for some time, the motor becomes very abnormal sound, remove the deep groove ball bearings have severe rusting. Many manufacturers will be considered as deep groove ball bearing problems, through our continuous propaganda, now the motor plant has been realized mainly insulating paint problems. The main problem is because the insulating paint out of the volatile acidic substance at a certain temperature, humidity, corrosive substances are formed, causing damage after the deep groove ball bearing deep groove ball bearing channel corrosion. This problem can only be a good choice of insulating paint, and after a period of time after drying ventilation assembly.
Deep groove ball bearing life with the manufacture, assembly, use all closely related, must make every link in order to make deep groove ball bearings in the best operating condition, thus extending the service life of deep groove ball bearings.