Static load action of NSK bearing equivalent
Static load action of NSK bearing equivalent
2022年4月23日
How to lubricate fag imported bearings
How to lubricate fag imported bearings
2022年4月23日

Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise

  • Generally, if SKF bearings are used correctly, they can be used until the fatigue life is reached. However, there will be accidental and premature damage, which is not resistant to use. This early damage, as opposed to fatigue life, is the quality service limit known as failure or accident. Most of them are caused by careless installation, use and lubrication, foreign matters invading from the outside, and insufficient research on the thermal effects of shafts and shells.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • As for the damage state of SKF Bearing, such as the clamping damage of roller bearing ring and retaining edge, these reasons can be considered. These reasons also coincide with insufficient lubricant, unsuitable, defects of oil supply and drainage structure, invasion of foreign matters, installation error of SKF Bearing and excessive deflection of shaft.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • Generally, the shaft adopts double support structure, and the radial position of the shaft is jointly limited by two supports. Each support shall have a radial positioning radial or angular contact bearing. The axial position can be limited by two supports in one direction, and the axial displacement in two directions can also be limited by one support. Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • In general, different axial positioning methods can obtain different operation accuracy. Therefore, when designing the supporting structure, the specific scheme of axial positioning should be selected according to the operation accuracy and working conditions of the shaft. Angular contact bearings are installed in pairs in three ways.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  •  The opposite installation of the wide end faces of the outer rings of two SKF bearings is called back-to-back installation. The action points of the two supporting forces fall outside the supporting span. This arrangement is widely used because of its large support span, good rigidity when the shaft is cantilevered, and the tendency of separation of the inner and outer rings when the shaft is heated and extended, so the shaft will not get stuck. However, if pre tightening installation is adopted, the pre tightening amount will be reduced when the shaft is heated. 
  • The opposite installation of the narrow end faces of the two bearing outer rings is called face-to-face installation. The force action point of the two supports falls within the support span. This arrangement has the advantages of simple structure, convenient assembly, disassembly and commissioning, so it is also widely used. It is mainly used for short shafts and occasions with low temperature rise, but pay attention to reserve clearance. The axial clearance should not be too large, which will reduce the operation accuracy of the shaft. 
  • When the axial load is large and multiple bearings are required to bear it at the same time, the series mode of relative installation of wide and narrow outer ring of SKF Bearing is often adopted. The force action points of each SKF Bearing fall on the same side of the bearing, so it is called in-line arrangement, also known as series connection. When adopting this arrangement, pay attention to the structure and manufacturing to ensure that each SKF imported bearing can bear the load as evenly as possible.
  •  In order to maintain the flexible rotation of the shaft, in the design of the supporting structure, while meeting the requirements of axial positioning accuracy, the requirements of free expansion of the shaft due to heating should also be considered. Axial positioning and axial expansion are corresponding.
  • The axial position adjustment of the shaft is to meet the special requirements of some meshing transmission. For example, in worm drive, the worm axis must fall in the middle plane of the worm gear to ensure its correct engagement, so it is required that the worm gear shaft can adjust its position in the axial direction. In bevel gear transmission, the pitch cone apex of two bevel gears must coincide, so it is required that both bevel gear shafts can be adjusted axially.
  • The assembly method of Timken bearing is to sort the dimensions of inner ring, outer ring and rolling element, and ensure the required radial clearance or width after assembly. One of the main processes in the assembly process of Timken bearing is the process of selecting and matching the sleeve. First, select and group the diameter and size of the ring raceway, and then match the inner ring, outer ring and rolling element of various groups according to the clearance or width tolerance required by Timken bearing to become the assembly method of “one set”
  • Timken bearing In the process of bearing ring processing, for various reasons, the raceway size will be too scattered or the center of the tolerance zone will deviate, or even exceed the scope of the tolerance zone. These problems will reduce the matching rate.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • The bicycle uses rubber sealed deep groove ball bearings. Such bearings are afraid of knocking (needle roller Peilin and big Peilin have stronger resistance to knocking), and the heating loading method can not be used. However, because the interference of bicycle Peilin is very small, and even qinghaopeilin flower drum can be put into Peilin by hand, the tapping with rubber hammer is relative, but the backing object pushed in needs to have a very flat surface, and static pressing is used, For example, vise pressing is the way.
  • Another reason for the damage of up to 16% is the improper assembly, wrong or violent loading method, which has caused the percussion and hard injury on the surface of the smooth bell bowl when loading.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • In order to tighten the shaft axis and prevent the shaft sleeve friction phenomenon (this phenomenon will produce high temperature in a moment on the high-speed rotating machinery, causing the lubricating oil to burn dry and even cause the heat rise to jam, resulting in shutdown), the inner bell and outer bowl of the bearing (also known as the bearing box in industry) use a kind of “interference” phenomenon. Generally speaking, the shaft is larger than the inner bell, or the outer bowl is larger than the load.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  •  This interference requires a lot of force to load, Such loading requires great force to knock Peilin, which will cause damage to Peilin in the process of knocking. Therefore, large bearings in industry usually adopt heating, hydraulic jacking and other methods.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • Therefore, before matching, the Timken bearing ring in stock shall be preliminarily selected to master the size of its raceway, and timely put forward the customized order for the processing tolerance of supporting parts (inner ring or outer ring) to the grinder operation area according to the size of the rolling element. After receiving the tolerance order, the grinder operation area shall be processed in strict accordance with the customized tolerance dimension.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  •  In this way, the matching rate of Timken bearing assembly can be improved. The use factors of Koyo bearings mainly refer to whether the installation, adjustment, use and maintenance, maintenance and repair meet the technical requirements. According to the technical requirements of Koyo bearing installation, use, maintenance and repair, monitor and inspect the load, speed, working temperature, vibration, noise and lubrication conditions of the running bearing, find out the causes immediately and adjust them to make them return to normal.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  •  The installation condition is the primary factor in the use factors. The bearing often changes the stress state between the parts of the whole bearing due to improper installation. The bearing operates in an abnormal state and ends its service life early. Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • The internal factors mainly refer to the three factors that determine the quality of Koyo bearing, such as structural design, manufacturing technology and material quality. NTN bearing is a precision part of imported bearings. The system realizes the optimization of workshop asset efficiency and maintenance work for the decision support of mechanical service, preventive maintenance means, condition monitoring and a series of maintenance work. Therefore, bearing plays a vital role in some industries. 
  • The shaft parts of machine tools, especially the spindle, are generally assembled with NSK Bearings or sliding bearings and rotate at a high speed, sometimes generating high heat. If this phenomenon is not eliminated in time, it will lead to overheating of the bearing and increase the temperature of the corresponding parts of the machine tool, resulting in thermal deformation.
  •  In serious cases, the height of the spindle and tailstock will be unequal, which will not only affect the accuracy and machining accuracy of the machine tool itself, but also burn out the bearing. The causes of main shaft bearing heating and its troubleshooting are shown in Table.
  • In order to ensure the working condition of NTN bearing, it is necessary to avoid damage as much as possible. What should we do?Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • Generally, if the bearing is used correctly, it can be used until the fatigue life is reached. However, there will be accidental and premature damage, which can not be resistant to use. This early damage, as opposed to fatigue life, is called the quality service limit of failure or accident. Most of them are caused by careless installation, use and lubrication, foreign matters invading from the outside, and insufficient research on the thermal effects of shafts and shells.
  • Impact sound of rolling element and its control method when the ball bearing or cylindrical roller bearing of larger model runs at low speed under pure radial load, due to the small centrifugal force of the rolling element, the rolling element in the non load area will impact the cage or raceway and make noise. Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • But as the speed increases, the sound will disappear. The control methods of impact sound of rolling elements are: appropriately reduce the radial clearance, and use the bearing of cage with reasonable structure and flexible material.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • The rolling sound of imported Koyo bearings and its control method rolling sound is the harsh metal friction sound that can occur in cylindrical roller bearings on all occasions. Most of it occurs in larger types of grease lubricated bearings, which is more likely to occur in greases with degraded base oil performance and hardly occurs in oil lubrication. In addition, it is easy to occur in winter. Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • When bearing pure radial load, it is easy to occur in the case of large radial clearance, and it is easy to occur in a specific speed range with different models and sizes, both continuously and intermittently. Special processing methods for the outer ring raceway can prevent the occurrence of rolling sound.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  •  If necessary, this kind of bearing can be selected, or the radial clearance of the bearing can be appropriately reduced, the lubricating grease with excellent performance can be used and the rigidity of the parts matched with the bearing can be improved.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
Essential factors of Koyo imported bearing noise
  • As for the damage state of NTN bearing, for example, the clamping damage of the ring retaining edge of roller bearing can be considered as the reason. These reasons can also coincide with insufficient lubricant, unsuitable, defects of oil supply and drainage structure, intrusion of foreign matters, bearing installation error and excessive deflection of shaft.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise

Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise

  • Therefore, only investigating the bearing damage, it is difficult to know the real cause of the damage. However, if you know the use machinery, service conditions, the structure around the bearing, the situation before and after the accident, and combined with the damage state of the bearing and several causes, you can prevent the recurrence of similar accidents. In order to ensure the working condition of NTN bearing, it is necessary to avoid damage as much as possible. What should we do?Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • Generally, if the bearing is used correctly, it can be used until the fatigue life is reached. However, there will be accidental and premature damage, which can not be resistant to use. This early damage, as opposed to fatigue life, is called the quality service limit of failure or accident. Most of them are caused by careless installation, use and lubrication, foreign matters invading from the outside, and insufficient research on the thermal effects of shafts and shells.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • As for the damage state of NTN bearing, for example, the clamping damage of the ring retaining edge of roller bearing can be considered as the reason. These reasons can also coincide with insufficient lubricant, unsuitable, defects of oil supply and drainage structure, intrusion of foreign matters, bearing installation error and excessive deflection of shaft.
  • Therefore, only investigating the bearing damage, it is difficult to know the real cause of the damage. However, if you know the use machinery, service conditions, the structure around the bearing, the situation before and after the accident, and combined with the damage state of the bearing and several causes, you can prevent the recurrence of similar accidents. The structural design, manufacturing process and material quality of ina imported bearings are analyzed.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • INA imported bearings have reasonable design and advanced nature, so that long service life of INA bearing will be longer. The manufacturing of bearings generally goes through multiple processing processes such as forging, heat treatment, turning, grinding and assembly. Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • The rationality, advanced nature and stability of all the processing technologies will also affect the life of bearings. Among them, the heat treatment and grinding processes that affect the quality of finished bearings are often more directly related to the failure of bearings. In recent years, the research on the metamorphic layer on the working surface of bearing shows that the grinding process is closely related to the surface quality of bearing.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • The metallurgical quality of ina imported bearing materials was once the main factor affecting the early failure of rolling bearings. With the progress of Metallurgical Technology (such as vacuum degassing of bearing steel), the quality of raw materials has been improved. The proportion of raw material quality factor in bearing failure analysis has decreased significantly, but it is still one of the main influencing factors of bearing failure. Proper material selection is still a factor that must be considered in bearing failure analysis.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • The main task of ina imported bearing failure analysis is to find out the main factors causing bearing failure according to a large number of background materials, analysis data and failure forms, so as to put forward targeted improvement measures, prolong the service life of the bearing and avoid sudden early failure of the bearing. For the use of bearings, noise is very common.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  •  Even the low-noise bearings in the imported Koyo bearings have the same situation. So why does it make noise? Today I will introduce its essence to you.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • The raceway sound of Koyo imported bearing and its control method raceway sound is a smooth and continuous sound generated by the rolling body rolling on the raceway surface when Koyo imported bearing is running. It is a unique basic sound that will occur in all rolling bearings. The general bearing sound is the sound of raceway plus other sounds. Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • The raceway sound of ball bearing is irregular, and its frequency is above 1000Hz. Its main frequency does not change with the speed, but its total sound pressure level increases with the speed. For the bearing with loud raceway sound, the sound pressure level of raceway sound decreases with the increase of viscosity; For bearings with low raceway noise, the sound pressure level changes from decrease to increase when the viscosity increases to more than 20mm2 / s. Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  • The greater the rigidity of the bearing pedestal, the lower the total sound pressure level of the raceway sound. If the radial clearance is too small, the total sound pressure level and dominant frequency of raceway sound will increase sharply with the decrease of radial clearance.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise
  •  The methods to control the sound of raceway are: select low-noise bearings, that is, bearings with small waviness, and carefully select the service conditions. Raceway noise often affects the noise of the whole machinery. Reducing raceway noise can reduce the noise of the whole machinery.Essential factors of Koyo impEssential factors of Koyo imported bearing noiseorted bearing noise