Working Principle of Hydraulic Motors and Selection Criteria

Hello! In this week’s blog post we will talk about working principle of Hydraulic motors and selection criteria! A hydraulic orbit motor is a mechanical actuator that converts hydraulic energy into mechanical energy. Unlike electric motors, which rely on electricity, hydraulic motors use pressurized hydraulic oil to generate rotational force. Working principle involves the flow of hydraulic fluid into the motor, where it pushes against the motor’s internal components, causing rotation. This motion can then be used to drive machinery, vehicles, or other equipment. Hydraulic motors are widely used in industrial, agricultural, forestry and mobile applications such as winches, conveyors, combine harvesters and construction machinery. If we need high torque and low speed, hydraulic motors are the correct components!

 

As Hidros Group, we offer wide range of hydraulic orbit motor series such as MM, MP, MR, MH, MS, MT & MV two directions, fixed displacement motors. These motors have different ranges of speed and torque.

 

Working Principle

The operation of a hydraulic motor can be summarized as following:

1. Fluid Inlet: Pressurized Hydraulic oil enters the motor through the inlet port.
2. Pressure Conversion: The fluid’s pressure is converted into mechanical energy as it moves through the motor’s internal components, such as gears, vanes, or pistons. Torque is related with pressure difference between inlet and outlet port.
3. Rotational Motion: The force generated by the fluid’s movement causes the motor’s output shaft to rotate.
4. Fluid Outlet: The fluid exits the motor through the outlet port, typically returning to the hydraulic oil tank.

   

   Selection Criteria for Hydraulic Motors

   Choosing the right hydraulic motor for your application involves several considerations:

   1. Torque and Speed Requirements: Determine the required torque and speed for your application. Gear motors are suitable for low to moderate torque, while radial piston motors are better for high-torque, low-speed applications.
   2. Operating Pressure: Consider the operating pressure of your system. Piston motors can handle higher pressures, making them ideal for demanding applications.
   3. Environmental Conditions: Evaluate the operating environment, including temperature, humidity, and exposure to contaminants. Some motors are more robust and better suited for harsh conditions.
   4. Space Constraints: Consider the physical size and shape of the motor, especially if space is limited. Compact designs like gear motors may be preferable in tight spaces. Some orbit motors have short and ultra-short configurations.
   5. Cost and Maintenance: Balance your budget with the motor’s performance and maintenance requirements. While piston motors may have higher upfront costs, they offer better long-term efficiency and durability.

    

   Conclusion

   Hidros provide complete line of low speed, high torque hydraulic motors for agricultural, mobile and industrial applications. 

   • Displacements from 8 to 800 cc/rev
   • Peak pressure level of 300 bar
   • Max speed up to 2440 rpm

   Including wide variety of flanges, manifolds and shaft versions, port types etc. We look forward to see you in the next post!