Hydraulic motors, also known as oil motors, are mainly used in injection molding machinery, ships, hoists, construction machinery, construction machinery, coal mining machinery, mining machinery, metallurgical machinery, ship machinery, petrochemicals, port machinery, etc. It has the advantages of small size, light weight, simple structure, good manufacturability, insensitivity to oil pollution, impact resistance and low inertia. So how much do you know about it? Next, let's talk about the issues that need attention when using hydraulic motors.
The speed range of the hydraulic motor needs to be large enough, especially for its lower stable speed
The speed range of the hydraulic motor needs to be large enough, especially for its lower stable speed. Therefore, it usually uses rolling bearings or hydrostatic sliding bearings; secondly, because the hydraulic motor works under the condition of input pressure oil, it does not need to have the self-priming ability, but it needs to have the initial seal to provide the necessary starting torque. Because of these differences, hydraulic motors and hydraulic pumps are similar in structure, but they cannot work reversibly.
1. When the inertia of the driven part is large, if it is required to brake or reverse or drop in a short time, a safety valve buffer should be set in the oil return line to prevent sudden hydraulic shock from causing damage.
2. When using a quantitative motor, if you want to start and stop smoothly, you should use the necessary pressure control or flow control methods in the circuit design.
3. When a hydraulic motor is used as a lifting tool or a power part of a walking device, a speed limit valve should be set to prevent heavy objects from falling quickly or overspeed when the walking mechanism of a vehicle goes downhill, causing serious accidents.
4. Since the hydraulic motor always leaks, the inlet and outlet of the hydraulic motor are closed for braking. It will still slip slowly. When braking is required for a long time, a separate brake to prevent rotation should be provided.
5. When starting at full load, you should pay attention to the starting torque value of the hydraulic motor, because the starting torque of the hydraulic motor is smaller than the rated torque, if you ignore it, the working mechanism will not be able to operate.
6. Since the oil return back pressure (outlet pressure) of the hydraulic motor is higher than the atmospheric pressure, the oil drain pipe of the motor must be led back to the oil tank separately and cannot be connected with the oil return pipe of the hydraulic motor.