Causes of burning out and burning out of Roots blower motor
Many users often use Roots blower In the process of, will call to inquire about the cause of the motor burn out, Hongguang Xiaobian these days on the motor burning damage to do the following summary, hope to help you.
1、 Open phase operation
Roots blower Most of the matching three-phase asynchronous motors are supplied with 380V three-phase power supply. If we connect 220 V or one of the three-phase power supplies has a virtual contact, one of them will not work when starting the machine. At this time, the motor will sometimes rotate, the vibration of the motor will increase, abnormal sound will appear, the speed will decrease, and the current will increase The temperature of the motor will rise sharply, so that the motor will burn out in a few minutes, that is to say, the motor smokes. The most terrible thing is that the whole power supply system lacks phase. In addition, the switches of many equipment are self-locking or automatically opened (such as fans and pumps). After power failure, the power supply is short after a power failure Accident, may burn more than ten motors at a time, but the vast majority of cases is that the motor does not rotate, there is a buzzing sound, this is the best, then the user can check the circuit again.
2、 Site environment
The motor is burnt out due to external damage, If there is water wetting, the insulation of the motor will be reduced due to water ingress or moisture (if it is installed on the beach or in a humid environment, the motor is easy to burn, which is often encountered by users in aquaculture), wire aging, too much dust intervention (there is a lot of dust in the site of material transportation, and there will be a lot of dust adsorbed on the motor at the site. If it is not cleaned in time, it will be This is a common cause of motor burnout, Roots blower When the load exceeds the rated pressure, these conditions will affect the Roots blower The service life of the motor until the motor is burnt out. .
3、 Motor bearing damage
because Roots blower If the motor operates continuously for a long time, the temperature of the motor is too high, and the bearing does not replenish lubricating grease in time, which leads to the bearing oil consumption until the bearing is damaged. As a result, the friction between stator and rotor (commonly known as sweeping chamber) leads to a sharp rise in core temperature, combustion tank insulation and turn to turn insulation, resulting in short circuit between turns of winding from surface or "breakdown" to ground. In serious cases, the stator core is inverted, misplaced, the shaft is worn and the end cover is scrapped.
1. Improper bearing assembly, such as uneven impact on the inner ring of the bearing during cold installation, will lead to bearing damage, resulting in the loss of inner ring and outer ring of the bearing, or the interference amount becoming smaller, resulting in the inner race running phenomenon. When installing the motor end cover, uneven knocking will cause the bearing chamber of the end cover and the outer ring of the shaft to fit too loose, resulting in the outer race running phenomenon. The inner loop will occur. When the impact of the motor end cover is uneven, the bearing chamber of the end cover and the outer ring of the shaft are loosely installed, and the outer ring runs. The running of both the inner ring and the outer ring will result in a sharp rise in temperature. Intermittent outer rings are allowed as long as the bearing is complete.
2、 Roots blower During installation, the bearing wall of the bearing is not cleaned or oiled, the bearing wall is not cleaned, or the grease is not clean. For example, the bearing keeps a small amount of steel material. In order to clean it thoroughly, the running is that the bearing is damaged and the temperature rise is too high to burn the bearing..
3. Mixing different types of grease will damage the bearing.
4. The bearing itself has quality problems, such as rust spots on the raceway, inflexible rotation, small clearance and cage deformation.
5、 Roots blower If the standby machine is not running for a long time, the grease is deteriorated and the bearing is rusty. Only when used for maintenance and maintenance, please pay attention to regular inspection and regular replacement of the same brand of grease.
The above five points are a summary of the motor bearing and fan bearing, bearing damage caused the host overload, the motor burned.
It can also cause the common cause of motor burn out Roots blower The operating conditions of the system exceed the rated pressure, resulting in Roots blower Overload is caused by long-term operation under overload load. By the way, the cause of overload: the bearing damage of the fan leads to the increase of the fan shaft power and the fan load, which causes the motor to over current and burn out. If the fan suddenly falls into a foreign object. If the fan is jammed, it will stop instantly. Not only will the fan be seriously injured, but also the motor will be damaged and even burned. After the fan is started, the air valve is not opened or the opening is insufficient. This is also true when the fan is running under these conditions Roots blower Overload is a phenomenon in which the temperature of the motor will rise sharply until it burns out.
The main motor and fan are complete Roots blower The main body, the power of the fan is transmitted by the motor, so it is also right to maintain the motor Roots blower Can normal operation of an indispensable guarantee, I hope users can take a good look at the above introduction, this article is a small editor spent a long time of original Austria.
The causes of burning out and burning out of Roots blower motor are as follows: http://theoxfordjazz.com/xw/102.html
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