Motor steering problem
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Recently, there has been a dispute with other departments about the steering problem of the motor. Please ask.: 1. Who is responsible for confirming the steering direction of the motor in your factory after maintenance? Is it craftsmanship or maintenance personnel? 2. Does the motor's steering have no fixed direction? Are there any manufacturing specifications or standards in this regard that stipulate the factory motor steering? 3. What are the dangers of running the motor "reversely" for a long time?
1. The electrician is responsible for the steering of the motor after maintenance in our factory. If during the operation, you find that the pump does not fill with water or does not fill with water quickly, you can contact a maintenance electrician. 2. If the impeller is fixed with a screw or the impeller is installed directly with wires, the motor impeller will rotate in the opposite direction, which will cause the impeller to become loose. 3. The motor rotates reversely for a long time, and the pump does not fill with water or does not fill with water quickly, which damages the impeller. In addition, the motor is doing useless work, and the electric power is converted into heat energy, which burns out the seal or impeller.
Does the manufacturer have any restrictions on motor steering? Once a motor leaves the factory, should its steering be fixed?
The direction of the motor is determined by the rotation of the pump, and the motor rotates forward and reverse the same.
As far as the motor design and manufacturing itself is concerned, there are no steering regulations. The steering is related to the wiring. If you need to change the steering, you can swap any two of the three wires.
There should be regulations on the rotation of the motor, otherwise the cooling fan at the end of the motor would have forward and reverse directions. I hope a professional electrician can answer this question.
The direction of the motor is determined by the sequence of three-phase electricity. The direction of the motor cannot be fixed when it leaves the factory. If the motor runs for a long time, the pump impeller will become loose, and the worst case can fly out. The forward and reverse rotation of the motor is debugged by an electrician.
The motor can be rotated arbitrarily, and the direction of rotation can only be selected according to the requirements of the equipment used.
It should depend on the requirements of the equipment you bring.
Of course, the pump has requirements for forward and reverse rotation. Now there is a problem. Put aside the requirements of the pump and just discuss whether the motor has requirements for steering, or whether it has certain requirements! This post was last edited by cthlj2007 on 2009-4-6 16:21 ]
There are requirements for the motor. As mentioned above, the motor has a steering problem.
This problem is a common problem in many companies. If you want to make a clear distinction, you must have a leader who understands equipment to clearly define the responsibilities. Generally, after the motor is overhauled, a single test is required. The maintenance unit and process equipment are responsible for confirming the steering. The electrician is only responsible for transmitting power. If there is any problem with the steering, ask an electrician to change it. Electricians are awesome!
The fan at the rear of the motor does not affect cooling regardless of forward or reverse rotation. The reason is that the wind cover at the rear determines the direction of the wind to always blow towards the motor body. If the wind cover is removed, the temperature rise of the motor will increase regardless of forward or reverse rotation.
The electrician is responsible for the steering of the motor after maintenance in our factory. If during the operation, you find that the pump does not fill with water or does not fill with water quickly, you can call a maintenance electrician.
Motor steering should be based on supporting equipment. The motor rotation direction of different equipment may be different. For example, some magnetic pumps in chemical plants are clockwise and some are counterclockwise.
Just like how most people use their right hands, the rule is that the person stands on the fan end of the click, holds the right hand, the thumb points to the shaft head, and the other four fingers point to the steering of the motor, also called the right-hand rule
It doesn't matter whether the motor rotates forward or reverse, it mainly depends on the cooling mode. Some impeller fans are not suitable for reverse rotation. It also depends on whether the reversal will affect the driving equipment.
For a motor alone, it does not have forward or reverse rotation, but when used on a pump or other equipment, it will have a direction of rotation. Generally, an electric fitter is responsible for testing the forward and reverse rotation. If the unit does not have an electric fitter, then a fitter will have to be used. General craftsmen and operators are not responsible.
Ordinary motor design requirements do not consider the direction of rotation. Motors with direction requirements must mark the direction of rotation at an obvious location on the motor base.
There is no difference between forward and reverse rotation of the motor, but the equipment it drives has forward and reverse rotation. Reverse rotation has no effect on the motor, but does great damage to the mechanical seal of the pump. In addition, the impeller cap will also become loose.
The motor steering is usually confirmed by an electrician. As for the setting of the motor steering, it should mainly be determined by the equipment. I have also found that there are cases where the steering is different, but it is relatively rare.