Analysis of the installation of gear oil pumps and the issue of motor overheating

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According to the information provided by Dr. Zhang, gear oil pumps are primarily used for transporting and pressurizing oil-based fluids in industries such as petroleum, chemicals, metallurgy, mining, and power generation, as well as for fuel injection. They are also employed in the circulation of light oils in large mechanical equipment, and can be used as lubrication pumps in various types of mechanical devices. Motor overheating is a common problem that occurs during the operation of gear oil pumps. The specific analysis and testing are as follows: 1. Is the operating range (flow rate, head) beyond the design specifications of the gear oil pump? Select the appropriate motor based on the series spectrum. 2. Should a motor be used whose specific gravity is higher than that of the gear oil pump? Configure an appropriate motor for the Dajiang gear oil pump. 3. Is the packing gland tightened too much, or are the springs of the mechanical seal adjusted too tightly? Readjust the spring compression of the gland or mechanical seal. 4. Is the pump of poor quality, with areas of friction or is the motor not aligned with the pump shaft? Check the assembly quality and eliminate any issues with the assembly? Based on the above conditions, an analysis can be conducted one by one to identify the true cause of the motor overheating, and then repairs can be carried out according to the specific fault. Engineer Li explained to everyone the precautions for installing gear oil pumps in hydraulic systems. 1. The coaxiality error between the drive shaft of the hydraulic pump and the motor’s drive shaft should be less than 0.1 MM; flexible couplings are generally used for this purpose. It is not allowed to use V-belts to directly drive the pump shaft, as this could subject the pump shaft to excessive radial forces and affect its normal operation ； 2. The rotation direction of the hydraulic pump, as well as the inlet and outlet ports, must be installed in accordance with the requirements ； 3. The suction height of various hydraulic pumps should generally be less than 0.5 M.