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空压机头部轴承需要大修的缘由
Time:2019-06-03 13:47:09       来源:/      

  济南空压机头部轴承需要大修的缘由

  Reasons for the Head Bearing of Jinan Air Compressor Need Overhaul螺杆主机需要大修的原因:
  Reasons for overhaul of screw main engine:
  随着空压机空压机运行时间的推移,主机轴承必然磨损,导致螺杆轴向运动和径向位移增加,这种变化会使螺杆与螺杆、螺杆与主机壳体及前后端面间隙之间发生变化。这些间隙的变化在轴承的使用寿命内是正常和允许的,由此产生的空压机产气衰减和主电机负荷增加是正常和允许的。
  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.
  但随着机组运行时间逐渐接近主机大修周期,主机轴承的使用寿命逐渐接近最大允许使用期限。此时螺杆的轴向和径向通道动量逐渐接近设计的最大允准值,这将使螺杆与螺杆之间、螺杆与主机壳体之间、前后端面之间的间隙发生较大的变化。虽然主机仍然可以安全运行,但是是时候安排一次大的检修了。机组运行时间超过大修周期后,主机轴承磨损和配合间隙达到主机技术条件允许的极限。此时主机处于不安全运行状态,随时可能发生以下严重后果:
  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,主机运行负载的增加,主电机和电气系统主机螺杆之间的伤害,和螺旋之间的前后端,螺钉和主机之间的壳之间可能出现强烈的摩擦会使主机运行负荷大幅增加,此外,严重磨损的轴承运行负载也是非常大的。这样,电机将处于超负荷工作状态,将严重危害电机的安全运行。如果情况严重,如果空压机电气保护装置不灵敏或发生故障,可能会导致电机烧毁。
  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、空压机排气量会发生较大衰减。
                                    济南空压机
  2. Air compressor exhaust volume will be greatly attenuated.
  主机配合间隙的增大会导致主机效率的严重降低,即空压机排气量会有较大的衰减,这将对燃气机组的正常生产产生一定的影响。尤其是对空气压缩机排气配置丰富的少量的用户,由于衰减,气体的空气压缩机排气系统相对稳定的条件下,管网将减少大量的压缩空气压力、气体系统设备可能出现不能工作或无法正常工作,影响装置的正常生产或造成暂时关闭,带来损失。
  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.最严重的后果就是主人突然“拥抱死亡”。
  3. The most serious consequence is that the master suddenly "embraces death".
  一旦发生这种情况,如果电气保护系统反应时间过长或保护失效,也可能给主电机和电气系统带来严重的损坏。
  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.
  主机“锁”治疗,一方面,检修的维护成本将是昂贵得多比正常的改革,另一方面,因为主机组件会有伤害,所以修理主机的综合性能将比正常检查主机。但是如果主机损坏严重到没有维修价值或者根本无法维修的程度,只能报废更换一台新的主机,直接损失最大。因为新购买的主机的成本通常是购买整个空气压缩机约三分之一的成本,远远高于正常主机检修成本,和在正常情况下改革限定主机综合技术性能和新的主机非常相似!
  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.
  综上所述,可见正常的主机大修工作不仅是设备维修的基本要求,也是企业控制正常设备维修成本,避免不必要的资金损失,保证企业正常生产的基本要求!
  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,不仅要按时按标准对空压机进行大修,而且也很有必要!螺杆空压机主机需要大修的判断:
  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:
  准确,检修时间应该主机轴承的使用寿命到期为准,但实际上很难有精确的指标来判断轴承的使用寿命即将到期或已经到期,所以国际著名空气压缩机制造商根据近几百年的实践经验来确定标准是在压缩机运行20000小时,或四年检修主机。
  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.
  除了以上标准外,根据经验,我们还可以从以下几个方面对东道国的状况做出准确的判断:
  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)主机运转时的声音,特别是轴承的声音;2)电机运行电流,特别是空载运行电流与标准值的差异;3)机头各轴承振动。
  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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