How to lubricate fag imported bearings
How to lubricate fag imported bearings
2022-04-23
Common sense of Koyo bearing temperature inspection
Common sense of Koyo bearing temperature inspection
2022-04-24

The vibration and temperature of Timken imported bearing judge the bearing damage

  • The quality of antirust materials directly affects the quality of product processing. Therefore, when selecting antirust materials, the physical and chemical properties shall be tested according to the quality requirements first, and then the pilot test shall be carried out after being qualified. Only when meeting the process requirements can they be used in large quantities. The vibration and temperature of Timken imported bearing judge the bearing damage
  • The antirust auxiliary materials selected for use shall be strictly tested according to the quality standards of different materials after entering the factory. Only after they are qualified can they be issued and used by the supply department. During use, the antirust materials and the prepared solution shall be tested regularly to ensure that the concentration and proportion of the solution meet the process requirements and meet the service performance. The establishment of a complete material acceptance system and quality acceptance standards provides a reliable guarantee for doing a good job in rust prevention management.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Cooling water mainly plays multiple roles in Koyo bearing processing, such as cooling, lubrication, cleaning and rust prevention. Its correct use and maintenance directly affect the surface quality of machined parts and the service life of cutting tools. The cooling water used by Koyo bearings can be roughly divided into soda water, emulsion and synthetic grinding fluid. The vibration and temperature of Timken imported bearing judge the bearing damage
  • Basically, more than 50 tons of groove fluid is used for large-scale circulation. The washed grinding products, grinding wheel dust, iron filings and oil stain are easy to cause the corruption and deterioration of the cooling water, resulting in the burn and corrosion of processing parts. Strengthening the scientific management of cooling water can improve its performance, ensure product quality and reduce the use cost of cooling water.The vibration and temperature of Timken imported bearing judge the bearing damage
  • In order to ensure that the antirust process can be seriously implemented, the technology department formulates specific assessment rules according to the process requirements, and converts the component value to assess the manufacturer. The first-class antirust management personnel shall conduct a monthly process discipline inspection on the production plant, conduct a comprehensive inspection on the management of cooling water, The vibration and temperature of Timken imported bearing judge the bearing damage
  • Antirust fluid, cleaning fluid and antirust oil, the corrosion rate, cleanliness and oil coating packaging of finished Koyo bearings, the management level of antirust personnel and the detection of monitoring items, score the assessment, and send the assessment results to the production plant. Establish a rust prevention management network from top to bottom, so that the rust prevention work has a good management foundation.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Apply anti rust oil like finished product. This method must be cleaned before the next process, which is more troublesome.The vibration and temperature of Timken imported bearing judge the bearing damage
  • After cleaning, immerse the product in a solution containing 15% – 20% sodium nitrite and 0.6% sodium carbonate, and then stack it. Using this method, the anti rust period is short, which can only be maintained for 7-14 days. Moreover, in the rainy season, due to the humid weather, it can only be maintained for 2-3 days, so it must be reprocessed, which requires labor and money.The vibration and temperature of Timken imported bearing judge the bearing damage
  • When the Koyo bearing ring is immersed in the aqueous solution of 5% sodium nitrite and 0.6% sodium carbonate, the antirust effect is good, but many antirust tanks and other equipment are required, which takes up a lot of space and is inconvenient for management. After the installation of fag inlet bearing, in order to check whether the installation is correct, operation inspection shall be carried out.
  •  Small machinery can be rotated by hand to confirm whether it rotates smoothly. The inspection items include poor operation caused by foreign matters, scars and indentation, unstable torque caused by poor installation and poor processing of mounting base, excessive torque caused by too small clearance, installation error and sealing friction, etc. If there is no abnormality, the power operation can be started.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Large machinery cannot rotate manually, so the power shall be cut off immediately after no-load start, and the machinery idles. Check whether there is vibration, noise, contact of rotating parts, etc. after confirming that there is no abnormality, enter the power operation.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Power operation, starting from no-load and low speed, slowly increase to the rated operation under the specified conditions. During the test run, the inspection items are whether there is abnormal sound, the temperature change of fag inlet bearing, lubricant leakage or discoloration, etc. If any abnormality is found, stop the operation immediately, check the machinery, and remove the bearing for inspection if necessary.
  • The temperature of fag inlet bearing can generally be inferred from the external temperature of bearing pedestal. However, it is more accurate to directly measure the temperature of the bearing outer ring by using the oil hole. The bearing temperature rises gradually from the beginning of operation, and the temperature is usually stable after 1 ~ 2 hours.The vibration and temperature of Timken imported bearing judge the bearing damage
  •  If the bearing is not installed properly, the temperature will rise sharply, resulting in abnormal high temperature. The reasons are too much lubricant, too small bearing clearance, poor installation, excessive friction of sealing device, etc. In the case of high-speed rotation, the wrong selection of fag imported bearing structure and lubrication mode is also the reason.The vibration and temperature of Timken imported bearing judge the bearing damage.The vibration and temperature of Timken imported bearing judge the bearing damage
  • The rotating sound of fag imported bearing was checked with a stethoscope, and there were strong metal noise, abnormal sound, irregular sound, etc., indicating that it was abnormal. The reasons are poor lubrication, poor accuracy of shaft or bearing seat, bearing damage, foreign matter intrusion, etc. The function of SKF imported bearing coordination is to make the stationary ring and rotating ring of SKF imported bearing consolidate with the stationary part (usually bearing seat) and rotating part (usually shaft) of the installation part respectively, so as to realize the basic task of transmitting load in the rotating state and limiting the position of the moving system relative to the stationary system.The vibration and temperature of Timken imported bearing judge the bearing damage
  • On the shaft and in the bearing pedestal, SKF imported bearings are required to fix their positions in three directions: radial, axial and tangent directions. Radial and tangential positioning is realized through tight fit of SKF imported bearing ring, and tight fit is adopted for axial positioning only in a few cases; Generally, axial limit parts, such as end caps and retaining rings, are used to limit the axial position within the clearance range. At present, Timken imported bearings are frequently damaged, so how to judge the damage is more important for us.
  • Timken inlet bearing vibration
  • Timken imported bearing vibration is very sensitive to bearing damage, such as peeling, indentation, corrosion, crack, wear, etc., which will be reflected in the bearing vibration measurement. Therefore, the vibration can be measured by using a special Timken imported bearing vibration meter (frequency analyzer, etc.), and the specific abnormal situation can not be inferred by frequency division. The vibration and temperature of Timken imported bearing judge the bearing damage
  • The measured values are different due to the service conditions of Timken imported bearings or the installation position of sensors. Therefore, it is necessary to analyze and compare the measured values of each machine in advance to determine the judgment standard.The vibration and temperature of Timken imported bearing judge the bearing damage

Timken inlet bearing temperature.The vibration and temperature of Timken imported bearing judge the bearing damage

  • The temperature of the bearing can generally be inferred from the temperature outside the bearing chamber. It is more appropriate if the oil hole can be used to directly measure the temperature of the outer ring of Timken inlet bearing.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Generally, the temperature of the bearing starts to rise slowly with the operation of Timken imported bearing, and reaches a stable state after 1-2 hours. The normal temperature of the bearing varies with the heat capacity, heat dissipation, speed and load of the machine. If the lubrication and installation parts are appropriate, the temperature of Timken inlet bearing will rise sharply and abnormal high temperature will occur. At this time, the operation must be stopped and necessary preventive measures must be taken.The vibration and temperature of Timken imported bearing judge the bearing damage
  • The thermal sensor can monitor the working temperature of Timken imported bearing at any time, and automatically alarm or stop when the temperature exceeds the specified value to prevent the occurrence of combustion shaft accident.The vibration and temperature of Timken imported bearing judge the bearing damage
  • High temperature often indicates that Timken imported bearing is in abnormal condition. High temperature is also harmful to the lubricant of the bearing. Sometimes Timken imported bearing overheating can be attributed to the lubricant of the bearing. If the temperature of Timken imported bearing exceeds 125 ℃ for a long time, the service life of Timken imported bearing will be reduced. The causes of high temperature bearings include insufficient or excessive lubrication and lubricant. The oil seal contains excessive clearance, insufficient friction, etc.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Therefore, it is necessary to continuously monitor the temperature of Timken inlet bearing, whether it is measuring the bearing itself or other important parts. If the operating conditions remain unchanged, any temperature change can indicate that a fault has occurred.VThe vibration and temperature of Timken imported bearing judge the bearing damage
  • Timken imported bearing temperature can be measured regularly with the help of thermometer, such as digital thermometer, which can accurately measure the bearing temperature and display it in ℃ or Fahrenheit.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Important Timken imported bearings mean that when they are damaged, the equipment will be shut down. Therefore, such bearings should be equipped with temperature detectors.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Under normal circumstances, Timken imported bearings will have a natural temperature rise after just lubrication or re lubrication and last for one or two days.The vibration and temperature of Timken imported bearing judge the bearing damage
The vibration and temperature of Timken imported bearing judge the bearing damage
  • In severe cases, metal peeling and large-area random scratches occur on the contact surface; In general, the mechanical damage of Koyo imported bearing refers to the appearance of groove marks at different levels on the alloy surface of bearing bush. Contact surface damage and ablation exist at the same time. The main reason for bearing mechanical damage is that the bearing surface is difficult to form oil film or the oil film is seriously damaged.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Plastic deformation and cold work hardening occur on the outer surface layer, and Koyo imported bearing is under the repeated action of cylinder pressure (impact load). The deformation capacity is lost locally, and the grain is gradually formed and continuously expanded. Then, with the falling off of wear debris, the loaded outer layer forms a hole. Generally, when the bearing bush is pitted, the pit first appears, and then the pit gradually expands and causes the cracking of the alloy layer interface. The vibration and temperature of Timken imported bearing judge the bearing damage
  • The crack extends along the parallel direction of the interface until it peels off. The main reason for bearing cavitation is that the sudden change of the cross section of structural elements such as oil groove and oil hole causes strong disorder of oil flow. Bubbles are formed in the vacuum area with disorder of oil flow, and then cavitation occurs due to the collapse of bubbles due to the increase of pressure. Cavitation usually occurs in the high load area of the bearing, such as the lower bearing bush of the crankshaft main bearing.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Due to the overload of the engine, the fatigue pitting corrosion of Koyo imported bearings refers to. Make the bearing overheat and the bearing clearance is too large, resulting in fatigue damage, fatigue pitting or fatigue falling off in the middle of the bearing. This kind of damage is mostly caused by overload, excessive bearing clearance, or unclean lubricating oil and foreign matters mixed in it. The vibration and temperature of Timken imported bearing judge the bearing damage
  • Therefore, when using, attention should be paid to prevent the bearing from overload and do not run at too low or too high speed; Adjust the engine to a stable state at idle speed; Ensure the normal bearing clearance and prevent the engine speed from being too high or too low; Check and adjust the working condition of the cooling system to ensure that the working temperature of the engine is appropriate.The vibration and temperature of Timken imported bearing judge the bearing damage
  • The chemical impurities (acid oxides, etc.) in the lubricating oil oxidize the bearing alloy to form acidic substances. The corrosion area of the bearing alloy is generally impure lubricating oil. Cause the bearing alloy to fall off locally and form irregular small cracks or pits. Improper use of bearing oil and lubricating alloy is the main reason for poor corrosion resistance of the engine.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Local high temperature is formed, and there is a small convex metal surface in direct contact between the journal and the friction pair of Koyo bearing. In case of lack of lubrication and poor cooling, the bearing alloy will be blackened or partially burned. This fault is often caused by too tight fit between journal and bearing; Lack of lubricating oil pressure is also easy to burn the bearing. As we all know, in addition to the adverse phenomena of the bearing in use, the noise also lies in the bearing itself. Different types of NTN bearings have different noise, so how do we choose the bearing with low noise?The vibration and temperature of Timken imported bearing judge the bearing damage
  • Bearings with relatively low noise: when the above two types of low noise bearings cannot be used, bearings with relatively low noise can be used. The specific comparison basis is as follows:The vibration and temperature of Timken imported bearing judge the bearing damage
  • The noise of ball bearing is lower than that of roller bearing, and the (friction) noise of bearing with less sliding is lower than that of bearing with more sliding; If there are many balls, the outer ring is thick and the noise is small;
  • The noise of bearings with solid cages is relatively lower than that of bearings with stamping cages;The vibration and temperature of Timken imported bearing judge the bearing damage
  • The noise of bearings with plastic cages is lower than that of bearings with the above two cages;The vibration and temperature of Timken imported bearing judge the bearing damage
  • The noise of bearings with high precision, especially those with higher rolling element precision, is relatively lower than that of bearings with low precision;The vibration and temperature of Timken imported bearing judge the bearing damage
  • The noise of small bearings is relatively lower than that of large bearings.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Rolling bearings with low noise requirements include: among the standard bearings produced in China, some single row radial ball bearings and short cylindrical roller bearings have low noise varieties for motor bearings. The inner diameter of ball bearing φ 2.5mm to φ There are several varieties of 60mm with three suffixes of ZL, Z2 and Z3, which correspond to three different low-noise requirements respectively. 
  • Among the roller bearings, there are eight models from n309 to n322, which are also manufactured according to the low-noise standard. These bearings can be fully applicable to other machines with low noise requirements, and the price is cheap. If the type and size can meet the requirements, try to use these two types of low noise bearings.The vibration and temperature of Timken imported bearing judge the bearing damageThe vibration and temperature of Timken imported bearing judge the bearing damage
  • There are two kinds of noise caused by problems in bearing application: scar sound and dust sound, which are described as follows:
  • Scar sound and its control method
  • If there is crack, indentation or corrosion on the rolling surface of rolling bearing, periodic vibration and noise like riveting rivets will occur. Its cycle may be fixed, but most of it has a certain corresponding relationship with the rotating speed. The scars will occur continuously on the channel, and the scars will appear on the steel ball from time to time, and this noise will change with the installation and lubrication conditions.
  • The control methods of this kind of noise are as follows: do not knock the NTN bearing during installation. When the bearing is assembled with the shaft and then installed into the bearing seat, prevent the bearing from being installed obliquely; Prevent NTN bearings from rusting during storage and impact vibration during transportation; Use grease with high viscosity.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Dust sound and its control method
  • If there are dust and other foreign matters in the rolling bearing, aperiodic vibration and so-called dust sound will occur. The magnitude of vibration and noise is uncertain, and there may or may not be.The vibration and temperature of Timken imported bearing judge the bearing damage
  • The control methods of dust noise include: improving the cleaning method of NTN bearing, and strictly cleaning the NTN bearing, shaft, seat hole and matching parts before installation; Remove foreign matters in the lubricant; Improve the sealing of NTN bearing; Avoid using plastic cages with impure materials or embedded foreign matters.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Noise caused by lubrication factors and Its Countermeasures
  • Incorrect lubricant selection, insufficient lubricant or aging hardening can lead to vibration and noise of NTN bearing, and this noise has no certain law. In this case, only select the appropriate lubricant, adjust the amount of lubricant, prolong the service life of lubricant and reasonably determine the replacement cycle.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Noise related to main engine and Its Countermeasures
  • This kind of noise is not caused by NTN bearings alone, so it is futile to find the reason only from the bearing. We should pay full attention to the main engine and improve the performance of the main engine if necessary. This paper mainly describes the common buzzer sound and frame resonance sound in the motor.The vibration and temperature of Timken imported bearing judge the bearing damage
  • Buzzer of motor and Its Countermeasures
  • The axial vibration of the motor shaft will cause great high-frequency noise – buzzer, and its frequency is the same as the axial vibration frequency, which can be constant or variable. The method to prevent the buzzer is the same as that to prevent the axial vibration.
  • Resonance sound of NTN bearing frame and Its Countermeasures
  • When the axial natural vibration of NTN inlet bearing frame is caused by the axial natural vibration of the above-mentioned outer ring mass, a noise called resonant sound will be generated. The method of pre tightening can improve the axial natural frequency of the outer ring mass system, destroy the resonance condition and reduce the noise. Proper material selection is still a factor that must be considered in bearing failure analysis. The vibration and temperature of Timken imported bearing judge the bearing damage
  • The main task of NSK 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. The installation condition is one of the primary factors in the use factors.The vibration and temperature of Timken imported bearing judge the bearing damage
  •  The improper installation of the bearing often leads to the change of the stress state between the parts of the whole bearing, and the NSK bearing operates in an abnormal state and fails early. According to the technical requirements of bearing installation, use, maintenance and repair, monitor and inspect the load, speed, working temperature, vibration, noise and lubrication conditions borne by the running bearing, find out the cause immediately and adjust it to make it return to normal.The vibration and temperature of Timken imported bearing judge the bearing damage
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