BWCB insulation gear pump motor high temperature reasons and countermeasures analysis 1, cause analysis (1) motor power, large operating current, large heat. (2) The fan speed is low, the wind pressure is small, and the air volume is small. (3) The number of fan blades is small, and the amount of wind generated is small. Reasons and Countermeasures for High Temperature of BWCB Insulation Gear Pump Motor
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1. Reason analysis (1) The motor has large power, large working current and large heat generation.
(2) The fan speed is low, the wind pressure is small, and the air volume is small.
(3) The number of fan blades is small, and the amount of wind generated is small.
(4) The motor is attached with dust and oil, which reduces the heat dissipation capability. {HotTag}
(5) The bus voltage of BWCB heat preservation gear pump motor is 380V. Due to the cable pressure drop and uneven load distribution, the actual voltage applied by the motor is only 365V. The low voltage causes the running current to be large.
2. Countermeasures The motor power and speed are matched with the BWCB insulated gear pump and cannot be changed. The fan is mounted on the motor spindle. The motor speed determines the fan speed and cannot be replaced. Although increasing the number of fan blades can play a certain role, but after the number of blades increases, the dynamic balance is not easy to find. If the alignment is not good, Botaibang will cause the motor vibration to increase.
(1) The original fan cover is lengthened by 40cm, and an axial fan with the same diameter as the fan cover is installed inside. The axial fan power is "target=_blank> machine motor power 850W, speed 1489r/min, voltage 380V. The original fan continues to retain The axial flow fan is additionally equipped with one power supply control, and the axial flow fan is not interlocked with the main motor. After the BWCB heat preservation gear pump starts, the axial flow fan is started in time, and the axial flow fan is stopped 30 minutes after the shutdown, so that the main motor is fully cooled. ;
(2) Regularly remove dust from the motor, keep the heat sink of the motor clean, and increase its heat dissipation capacity;
(3) Adjust the bus voltage of the BWCB heat preservation gear pump to 400V.
3. Effect (1) Due to the high speed of the axial flow fan, the wind pressure is large, and the cooling effect is greatly enhanced. Under the same ambient temperature and load current, the temperature of the main motor drops by 12 °C. The main motor temperature in summer is no longer exceeded.
(2) The axial flow fan can be artificially controlled. After the main motor is stopped, the axial flow fan can still operate, which can fully cool the main motor.
(3) Try to balance the load distribution of the two busbars as much as possible to prevent the voltage drop of a certain busbar from being overloaded due to excessive load.
(4) After the voltage is adjusted, the operating current of the BWCB insulated gear pump is reduced to 210A, and the heat generation is relatively reduced.
(5) Slow down the insulation aging speed of the main motor and prolong its service life.
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