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Causes of unexplained failure of Ko rotary table bearing during operation
Causes of unexplained failure of Ko rotary table bearing during operation
2022-04-07
inaフランジの軸受温度上昇の検査で注意が必要な問題
inaフランジの軸受温度上昇の検査で注意が必要な問題
2022-04-08

What should be paid attention to to to prevent IKO joint bearing failure

  • 初め, the reasonable design and advanced nature of the structure will lead to longer IKO bearing life. The manufacturing of bearings generally goes through multiple processing processes such as forging, heat treatment, turning, grinding and assembly.
  • The rationality, advanced nature and stability of all the processing technologies will also affect the life of bearings.What should be paid attention to to to prevent IKO joint bearing failure
  •  その中で, 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.

What should be paid attention to to to prevent IKO joint bearing failure

  • The feature of paint rust is that it often occurs in sealed motors. 組み立て時のモーター音はとても良いです, but after it is put in the warehouse for some time, モーターの異音が非常に大きくなる, and there is serious rust when the bearing is removed. 過去に, many manufacturers thought it was the problem of IKO bearing. What should be paid attention to to to prevent IKO joint bearing failure
  • Now the motor factory has realized that it is mainly the problem of insulating paint. This problem is mainly because the acid substances volatilized from insulating paint form corrosive substances at a certain temperature and humidity, which corrodes the bearing channel and leads to bearing damage.
  • 現在のところ, the problem can only be to select good insulating paint and assemble after drying and ventilation for a period of time.What should be paid attention to to to prevent IKO joint bearing failure
  • The service life of bearing is closely related to manufacturing, 組み立てと使用. すべてのリンクで適切に行う必要があります. Only by paying attention to the above precautions in the use of articulated bearing, ベアリングは稼働状態にできますか, so as to prolong the service life of bearing.What should be paid attention to to to prevent IKO joint bearing failure
  • ベアリングが常に良好な状態で動作するようにするために, 定期的なメンテナンスと修理が必要です, 事故を防ぎ、事故を防ぐために, improve the production efficiency of the enterprise and save costs.
  • To engage in the professional maintenance of bearings here, 標準的で体系的な運用プロセスが存在する必要があります, including operation status, 潤滑剤, 通常の分解, ノイズ, temperature and so on.What should be paid attention to to to prevent IKO joint bearing failure
  •  Selection and control of shaft and bearing tolerances
  • After the bearing is pressed into IKO bearing, ブロック感なくしなやかに回転します. 明らかな硬直した回転がある場合, it indicates that the size of the shaft is too large and the tolerance should be reduced. What should be paid attention to to to prevent IKO joint bearing failure
  • 明らかな場合 “さびた” ベアリングに入れ手で回転させたときの感触, it may be that the tolerance of the bearing is too large or the roundness of the bearing is not good.
  • したがって, シャフトとベアリングの公差を管理する場合, we should also control the roundness.What should be paid attention to to to prevent IKO joint bearing failure
What should be paid attention to to to prevent IKO joinWhat should be paid attention to to to prevent IKO joint bearing failuret bearing failure
Inspection and analysis of damage causes of ina joint bearing
Three methods to distinguish the quality of ina universal joint bearing and their application selection

Prevention of foreign matters during assembly

  • 動的バランスをとるためにローターにベアリングを取り付ける場合, it is easy to put the iron filings generated during dynamic balance into the joint bearing, so it is necessary to perform dynamic balance before installing the bearing. 組み立てを容易にするために, 一部のメーカーは、組み立て中に潤滑効果を得るためにベアリング チャンバーにオイルまたはグリースを塗布します。, しかし、オペレーターが量を制御することはしばしば困難です. What should be paid attention to to to prevent IKO joint bearing failure
  • 軸受室内にオイルやグリスが溜まっている場合, ベアリングが回転するときにシャフトに沿ってベアリングに入りやすい. ベアリングにオイルやグリースを塗布してはならない. どうしても塗らなければならない場合, it shall be controlled and there shall be no accumulation in the bearing chamber.What should be paid attention to to to prevent IKO joint bearing failure
  • The metallurgical quality of joint 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. What should be paid attention to to to prevent IKO joint bearing failure
  • The proportion of raw material quality factor in IKO 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.
  • The main task of joint 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 IKO bearing.What should be paid attention to to to prevent IKO joint bearing failure
Inspection and analysis of damage causes of ina joint bearing
  • The limit speed of INA Bearing when grease lubrication and oil lubrication (油浴潤滑) are respectively contained in the size table of each bearing, and its value represents the limit value of speed when the bearing of standard design rotates under general load conditions (C / P / 13, FA / FR ≤ about 0.25). 加えて, bearing lubricant may be superior to other properties according to its type and brand, but it is not suitable for high-speed rotation.What should be paid attention to to to prevent IKO joint bearing failure
  • When the load condition C / P < 13 (すなわち. the equivalent dynamic load p exceeds about 8% of the basic rated dynamic load C), or the axial load in the synthetic load exceeds 25% of the radial load, the formula shall be used to correct the limit speed.What should be paid attention to to to prevent IKO joint bearing failure
  • The speed of the bearing is mainly limited by the temperature rise caused by friction heating inside the INA Bearing, but when the speed exceeds a certain limit, the high-temperature bearing will not continue to rotate due to burns, etc.What should be paid attention to to to prevent IKO joint bearing failure
  • Precautions for measuring bearing radial clearance:What should be paid attention to to to prevent IKO joint bearing failure
  • Special instrument measurement method shall be adopted as far as possible;
  •  Using the hand push method requires the surveyor to have high measurement skills. The measurement error of this method is large, especially when the clearance is in the edge state, it is easy to cause error. 現時点では, the instrument measurement should prevail;What should be paid attention to to to prevent IKO joint bearing failure
  • When measuring with a feeler gauge, it shall be operated according to the provisions of the standard, and the method of rolling the roller from the feeler gauge is not allowed;What should be paid attention to to to prevent IKO joint bearing failure
  • During the measurement, ensure that the ball falls into the ditch bottom; The closed bearing shall be measured before sealing; When using a loaded instrument, the measured value shall also subtract the increase of clearance caused by load.
  •  For multi row bearings, the clearance of each row is required to be qualified, and the arithmetic mean of the clearance of each row is taken as the radial clearance of high-temperature bearings.What should be paid attention to to to prevent IKO joint bearing failure
  • The limit speed of INA Bearing refers to the limit value of the speed that can rotate continuously without friction heating causing burns.
  • したがって, the limit speed of high-temperature bearing depends on the type, ベアリングのサイズと精度, 潤滑モード, quality and quantity of lubricant, material and type of cage, load conditions and other factors.What should be paid attention to to to prevent IKO joint bearing failure
Inspection and analysis of damage causes of ina joint bearing
  • It is hoped that the IKO bearing package will be opened just before installation. General grease lubrication, do not clean, directly fill with grease. For lubrication with lubricating oil, it is not necessary to clean in general. でも, IKO bearings for instrument or high-speed use should be cleaned with clean oil to remove the rust inhibitor coated on IKO bearings. The rust of the bearing can’t be removed despite the rust inhibitor IKO. さらに, IKO bearings sealed with grease can be used directly without cleaning.
  • The installation method of IKO bearing varies according to the structure, fit and conditions of IKO bearing. 一般的, the inner ring needs interference fit because it is mostly shaft rotation. IKO bearing with cylindrical hole is pressed in by press or hot assembly method. In the case of taper hole, it can be directly installed on the taper shaft or installed with sleeve.
  • When it is installed into the shell, there are usually many clearance fits, and the outer ring has interference. It is usually pressed in with a press, or there is a cold shrinkage fit method for installation after cooling.
  • When dry ice is used as coolant and cold shrinkage is used for installation, the moisture in the air will condense on the surface of IKO bearing. したがって, appropriate anti rust measures are needed.
  • Although the quality of IKO bearing is relatively good, the rolling bearing is a precision component, and its use must be carried out carefully accordingly. No matter how high-performance IKO bearings are used, それらが適切に使用されていない場合, they will not get the expected high performance.
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