In the maintenance of hydraulic motor, it often occurs that the speed of hydraulic motor is too high, which is generally caused by excessive oil supply. If we want to solve the problem of high speed of hydraulic motor, we must first reduce the excessive oil supply. In the hydraulic motor, there are several faults that cause excessive oil supply. Therefore, in the final analysis, if you want to solve the problem of high speed, you must start from the root. After analysis, there are several conditions that cause excessive oil supply to the hydraulic motor:
1. In the hydraulic system, the rotating speed of the prime mover of the power element (i.e. hydraulic pump) is too high, resulting in excessive oil supply to the hydraulic motor, which in turn leads to too high rotating speed of the hydraulic motor. It is also very simple to solve this problem. You only need to replace the hydraulic pump prime mover directly or adjust the speed again. If the speed cannot be adjusted, you can adjust it according to the product manual or ask a professional.
2. Just like the high speed of the prime mover, the flow setting value of the variable displacement pump is too high, resulting in excessive oil supply to the hydraulic motor. We only need to readjust it. If we are not familiar with the variable displacement pump, it is best not to set its parameters casually.
3. The flow valve on the hydraulic motor is not set properly, resulting in too large flow area, which leads to too high oil supply of the hydraulic motor and too high speed. Facing this situation, we only need to readjust the flow area of the lower flow valve to make it within an acceptable range, which can effectively solve the problem of high speed of the hydraulic motor.
4. Because the hydraulic motor exceeds the load function, it will also lead to excessive oil supply of the hydraulic motor. At this time, we need to balance its load function or adopt other methods to effectively restrict its load function.
Generally speaking, the reason for the high speed of the hydraulic motor is that the oil supply is too large, and there are four cases that cause the excessive oil supply. When this happens to the hydraulic motor, we only need to check the causes one by one, and we can deal with it quickly and effectively. If the above four conditions are checked and the hydraulic motor is still not handled, it may be the cause of other uncommon faults. At this time, it is necessary to find professional hydraulic motor maintenance personnel.
