how does a hydraulic orbit motor work?

Hydraulic Vs. Electric Motors

While an electric motor uses AC or DC power, a hydraulic motor generates rotation and torque from a flowing fluid. They need a pump, filter and piping, but don’t require long cable connections, high voltage supplies, or complex drive controllers.

In mobile applications a hydraulic motor is driven by a generator or engine, such as that used in a tractor or skid steer. They need little maintenance and are available for use in potentially explosive environments.

Hydraulic motors take many forms, using vanes, pistons or gears to turn fluid pressure into rotary motion. In principle they are little different to hydraulic pumps running in reverse.

Working Principle

• The operation of a hydraulic motor can be summarized as following:
• Fluid Inlet: Pressurized Hydraulic oil enters the motor through the inlet port.
• 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.
• Rotational Motion: The force generated by the fluid’s movement causes the motor’s output shaft to rotate.
• 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:

• 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.
• Operating Pressure: Consider the operating pressure of your system. Piston motors can handle higher pressures, making them ideal for demanding applications.
• Environmental Conditions: Evaluate the operating environment, including temperature, humidity, and exposure to contaminants. Some motors are more robust and better suited for harsh conditions.
• 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.
• 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.

Start-Up Loads

As with an electric motor, getting a hydraulic motor turning needs more force than is needed to maintain it at a steady speed. Impro Fluidtek hydraulic motors address this with a proprietary design of pressure-compensated balance plate. This is engineered to improve volumetric efficiency at startup and in steady-state operation.

High Power Density for Mobile and Industrial Applications
Impro Fluidtek produces three families of hydraulic orbital motors, all engineered for smooth torque delivery and high output at low speed. Applications include wheel motors, mobile rotary power, and heavy duty industrial equipment. Contact us to learn more.