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      空壓機頭部軸承需要大修的緣由
      Time:2019-06-03 13:47:09       來源:http://www.592free.com/      

        濟南空壓機頭部軸承需要大修的緣由

        Reasons for the Head Bearing of Jinan Air Compressor Need Overhaul螺桿主機需要大修的原因:
        Reasons for overhaul of screw main engine:
        隨著空壓機空壓機運行時間的推移,主機軸承必然磨損,導致螺桿軸向運動和徑向位移增加,這種變化會使螺桿與螺桿、螺桿與主機殼體及前后端面間隙之間發生變化。這些間隙的變化在軸承的使用壽命內是正常和允許的,由此產生的空壓機產氣衰減和主電機負荷增加是正常和允許的。
        With the running time of the air compressor, the main bearing will wear, which will increase the screw axial movement and radial displacement. This change will change the clearance between the screw and the screw, between the screw and the main body shell, and between the front and back end surfaces. These clearance changes are normal and permissible in the service life of bearings, and the resulting air compressor gas production attenuation and main motor load increase are normal and permissible.
        但隨著機組運行時間逐漸接近主機大修周期,主機軸承的使用壽命逐漸接近最大允許使用期限。此時螺桿的軸向和徑向通道動量逐漸接近設計的最大允準值,這將使螺桿與螺桿之間、螺桿與主機殼體之間、前后端面之間的間隙發生較大的變化。雖然主機仍然可以安全運行,但是是時候安排一次大的檢修了。機組運行時間超過大修周期后,主機軸承磨損和配合間隙達到主機技術條件允許的極限。此時主機處于不安全運行狀態,隨時可能發生以下嚴重后果:
        However, with the unit running time gradually approaching the main engine overhaul cycle, the service life of the main engine bearing is gradually approaching the maximum allowable service life. At this time, the momentum of the axial and radial passages of the screw gradually approaches the maximum allowable value of the design, which will make the clearance between the screw and the screw, between the screw and the main body shell, and between the front and rear end faces change greatly. Although the mainframe can still run safely, it's time to schedule a major overhaul. When the unit runs longer than the overhaul period, the wear and fit clearance of the main engine bearing reach the limit permitted by the main engine technical conditions. At this time, the host is in an unsafe state, and the following serious consequences may occur at any time:
        1,主機運行負載的增加,主電機和電氣系統主機螺桿之間的傷害,和螺旋之間的前后端,螺釘和主機之間的殼之間可能出現強烈的摩擦會使主機運行負荷大幅增加,此外,嚴重磨損的軸承運行負載也是非常大的。這樣,電機將處于超負荷工作狀態,將嚴重危害電機的安全運行。如果情況嚴重,如果空壓機電氣保護裝置不靈敏或發生故障,可能會導致電機燒毀。
        1. With the increase of the operating load of the main engine, the damage between the main motor and the main screw of the electrical system, and the strong friction between the front and back ends of the screw and the shell of the main engine, the operating load of the main engine will be greatly increased. In addition, the running load of the bearing with serious wear is also very large. In this way, the motor will be in an overload state, which will seriously endanger the safe operation of the motor. If the situation is serious, if the electrical protection device of the air compressor is not sensitive or fails, it may cause the motor to burn down.
        2、空壓機排氣量會發生較大衰減。
                                          濟南空壓機
        2. Air compressor exhaust volume will be greatly attenuated.
        主機配合間隙的增大會導致主機效率的嚴重降低,即空壓機排氣量會有較大的衰減,這將對燃氣機組的正常生產產生一定的影響。尤其是對空氣壓縮機排氣配置豐富的少量的用戶,由于衰減,氣體的空氣壓縮機排氣系統相對穩定的條件下,管網將減少大量的壓縮空氣壓力、氣體系統設備可能出現不能工作或無法正常工作,影響裝置的正常生產或造成暫時關閉,帶來損失。
        The increase of the main engine clearance will lead to a serious reduction of the efficiency of the main engine, that is, the exhaust volume of the air compressor will have a greater attenuation, which will have a certain impact on the normal production of gas generating units. Especially for a small number of air compressor exhaust configuration users, due to attenuation, the gas compressor exhaust system is relatively stable, the pipeline network will reduce a large number of compressed air pressure, gas system equipment may not work or can not work properly, affecting the normal production of the device or causing temporary closure, resulting in losses.
        3.最嚴重的后果就是主人突然“擁抱死亡”。
        3. The most serious consequence is that the master suddenly "embraces death".
        一旦發生這種情況,如果電氣保護系統反應時間過長或保護失效,也可能給主電機和電氣系統帶來嚴重的損壞。
        Once this happens, if the response time of the electrical protection system is too long or the protection fails, it may also cause serious damage to the main motor and the electrical system.
        主機“鎖”治療,一方面,檢修的維護成本將是昂貴得多比正常的改革,另一方面,因為主機組件會有傷害,所以修理主機的綜合性能將比正常檢查主機。但是如果主機損壞嚴重到沒有維修價值或者根本無法維修的程度,只能報廢更換一臺新的主機,直接損失最大。因為新購買的主機的成本通常是購買整個空氣壓縮機約三分之一的成本,遠遠高于正常主機檢修成本,和在正常情況下改革限定主機綜合技術性能和新的主機非常相似!
        On the one hand, maintenance costs will be much more expensive than normal reforms. On the other hand, because the components of the mainframe will be harmful, the comprehensive performance of the repaired mainframe will be better than that of the normal checking mainframe. But if the damage of the main engine is so serious that it has no maintenance value or can not be repaired at all, it can only be scrapped and replaced with a new main engine, and the direct loss is the greatest. Because the cost of newly purchased mainframe is usually about one third of the cost of purchasing the whole air compressor, which is much higher than the cost of maintenance of normal mainframe, and is very similar to the reform of limited comprehensive technical performance of mainframe and new mainframe under normal circumstances.
        綜上所述,可見正常的主機大修工作不僅是設備維修的基本要求,也是企業控制正常設備維修成本,避免不必要的資金損失,保證企業正常生產的基本要求!
        In summary, it can be seen that the normal overhaul of the main engine is not only the basic requirement of equipment maintenance, but also the basic requirement for enterprises to control the maintenance cost of normal equipment, avoid unnecessary capital losses and ensure the normal production of enterprises.
        因此,不僅要按時按標準對空壓機進行大修,而且也很有必要!螺桿空壓機主機需要大修的判斷:
        Therefore, it is not only necessary to overhaul the air compressor on time and according to the standard, but also necessary! The main engine of screw air compressor needs overhaul judgment:
        準確,檢修時間應該主機軸承的使用壽命到期為準,但實際上很難有精確的指標來判斷軸承的使用壽命即將到期或已經到期,所以國際著名空氣壓縮機制造商根據近幾百年的實踐經驗來確定標準是在壓縮機運行20000小時,或四年檢修主機。
        Accurate, maintenance time should be based on the expiration of service life of main engine bearings, but in fact, it is difficult to have accurate indicators to judge whether the service life of bearings is about to expire or has expired. Therefore, according to the practice experience of nearly several hundred years, the international famous air compressor manufacturers determine that the standard is to run 20,000 hours of compressor, or to repair the main engine for four years.
        除了以上標準外,根據經驗,我們還可以從以下幾個方面對東道國的狀況做出準確的判斷:
        In addition to the above criteria, based on experience, we can also make accurate judgments on the situation of the host country from the following aspects:
        1)主機運轉時的聲音,特別是軸承的聲音;2)電機運行電流,特別是空載運行電流與標準值的差異;3)機頭各軸承振動。
        1) The sound of the main engine, especially the sound of the bearings; 2) the operating current of the motor, especially the difference between the no-load operating current and the standard value; 3) the vibration of the bearings in the nose.
       

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