Turn the equipment manually before starting it up
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Could someone explain in some detail why it is necessary to turn the equipment shaft before starting it up? What are the hazards of not turning the shaft?
Take a look here: http://bbs.hcbbs.com/viewthread.php?tid=232332
Simply put, a rotor turning device is a mechanism that uses electricity to rotate the rotor; it consists of a motor, a reduction gear mechanism, a mechanism for connecting to the rotor, as well as various protective components. It is activated after the unit is shut down or before it is started, in order to rotate the rotor at a low speed (the usual speed for a barring gear is 4.61 revolutions per minute), thereby allowing it to cool or heat evenly. Prevent the rotor from bending. Additionally, engaging the barring gear before starting up can prevent the rotor at the shaft seal from being heated unevenly after the shaft seal is installed, thus avoiding bending; it can also reduce the impact force of steam on the rotor during startup. Once the rotor starts rotating and its speed exceeds that of the barring gear, the barring device will automatically disengage. 9 }. |0 M. e+ U) i* S# T : }' ~% \8 w1 s' Y9 l) X2 I0 c For details, please refer to the link above; there are many discussion posts there – take your time to read them.
It is mainly to check for any contact between the moving and stationary parts of the machine, in order to avoid serious accidents that could occur if the main motor is started running at full speed.
The purpose of turning the shaft before starting the equipment is mainly to check the flexibility of the shafts and bearings of operating equipment that has been shut down for a long time, preventing them from rusting and sticking together, which could otherwise cause the motor to burn out or damage the equipment’s components during startup.
It involves using hand to move the coupling before starting the pump, in order to help the rotor of the pump and the motor rotate slowly. The purpose is to prevent slight sticking between the rotor and the stator, which could lead to high torque when the pump starts suddenly; it also helps to achieve a preliminary fit between the ring seal and the mechanical seal friction pairs
Turning the shaft is used to check the flexibility of the bearings, as well as to see if the rotor is stuck or experiencing any jamming
Why is it necessary to turn the equipment shaft before starting it up? For such questions, think carefully and thoroughly on your own before asking them, so as to avoid making the forum appear unprofessional.
1. Turning the pump is done to check whether there are any loose or stuck components in the pump body. 2. Prevent the shaft from bending in one position for an extended period.
Turning the shaft before startup is to prevent it from getting stuck.
Turning the pump shaft is done to check whether there is any jamming in the equipment; starting the pump without doing this could damage it
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