(1) Human factors. A considerable number of users are randomly equipped with another motor to drive the original motor, resulting in low flow, low lift or no oil.
(2) The belt is worn. There are many large-scale hot oil pumps that use belt transmission. Due to long-term use, the belt is worn out and slacks, resulting in slipping, which reduces the speed of the hot oil pump.
(3) Improper installation. The center distance between the two pulleys is too small or the two shafts are not parallel. The transmission belt is tightly mounted to the top, so that the wrap angle is too small, the calculation of the diameter of the two pulleys is large, and the eccentricity of the two-axis of the hot oil pump of the coupling transmission is large. Causes the change of the speed of the hot oil pump.
(4) Mechanical failure of the hot oil pump itself. The impeller and the pump shaft fastening nut are loose or the pump shaft is deformed and bent, causing the impeller to move more, directly rubbing against the pump body, or the bearing is damaged, and the rotation speed of the hot oil pump may be lowered.
(5) Power machine maintenance is not working. The motor is de-excited due to the burning of the windings. The number of winding turns, the wire diameter, the wiring method change during maintenance, or the failure to completely eliminate the fault during maintenance will also change the speed of the hot oil pump.
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Label: hot oil pump speed is too low
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