​​Hydraulic motors are rotary actuators that convert hydraulic energy into mechanical torque, using pressure and flow from a hydraulic pump to rotate and drive, pull, or winch external loads across a range of machines, from construction equipment to food mixers.

There are three primary types of Automotive Lift Repair Florida hydraulic motors: gear, vane, and piston, each with its own unique design. Additionally, some motors use orbital technology, such as gerotor and geroller motors.

One example is the Automotive Lift Repair Florida axial piston variable motor, specifically designed for hydrostatic drivetrains. This motor enhances tractive force and speed in mobile machinery. Image courtesy of Bosch Rexroth.

Manufacturers produce fixed-displacement pumps in all major motor types, but only the piston variety is available with a variable-displacement option. In a fixed-displacement motor, the internal volume remains constant, and torque and speed are adjusted by varying flow and pressure. Variable-displacement motors, on the other hand, use swashplate control to offer infinite adjustments of speed and torque within a specific range.

 Understanding Motor Torque and Speed

Torque, which refers to the motor’s turning force, is measured in inch-pounds (in.-lb), foot-pounds (ft-lbs), or newton meters (Nm). Three key areas define torque performance in hydraulic motors:

1. Breakaway Torque: The minimum torque needed to start a motor without a load, accounting for internal friction and static friction.

2. Running Torque: The torque used to move a load during operation, which may be stable or variable depending on the application.

3. Starting Torque: The torque required to start a motor under load, combining load-induced torque (considering inertia) and breakaway torque. The ratio of actual torque to theoretical torque gives the motor’s mechanical efficiency.

The internal volume of a Automotive Lift Repair Florida hydraulic motor, or displacement, is the amount of fluid the motor circulates per rotation, expressed in cubic centimeters or cubic inches. Larger displacement produces greater force per unit of hydraulic pressure, but motor speed is inversely proportional to displacement. Efficiency must also be factored in when calculating desired output speed, as real-world performance often falls short of theoretical values.

Different motor types have distinct characteristics and performance levels relative to cost. Gear motors are inexpensive but limited to medium pressure, medium torque, and high speed (up to 3,000 rpm), with a narrow range of displacement. Vane motors are quieter, more efficient, and suitable for medium pressure and speed, offering a better option than gear motors.

Piston motors provide a wide range of capabilities, from small to large displacements, and are known for high efficiency and long-term return on investment. They offer high pressure, high torque, and high-speed options, with various control features.

Each motor type has a different construction. Gear motors use two gears, one driven and one idle, where high-pressure oil moves around the gears to the outlet port. Vane motors have a rotor with sliding vanes in an eccentric bore, where pressurized fluid causes the rotor to turn. Piston motors, available in radial, axial, and bent-axis designs, use fluid pressure to move pistons, with axial-piston motors featuring either swashplate or bent-axis configurations.

Orbital motors, including gerotor and geroller designs, use special valves and rotors to distribute pressurized fluid, providing smooth, low-speed operation and longer life. Geroller motors, with lower friction and higher efficiency, offer higher start-up torque than gerotor designs.

 Selecting a Automotive Lift Repair Florida Hydraulic Motor

When choosing a hydraulic motor, consider the maximum operating pressure, speed, and torque to determine the appropriate displacement and flow requirements. The fluid type is also important, as some systems may require environmentally friendly or fire-resistant fluids, affecting seal and technology choices. Contamination resistance and filtration needs are crucial factors, as well as the motor’s efficiency, repairability, and compatibility with other brands. Additionally, the motor’s size and weight will impact the overall system or machine design.

 Driving Your Business Forward

Across all industries and applications, one constant remains: the increasing demand for faster, more reliable, and high-quality production. This trend brings industrial hydraulic drives into focus. To maximize productivity, it is crucial to control speed and torque in alignment with the process. This not only enhances manufacturing efficiency but also helps reduce costs related to energy consumption and product lifecycle management. Bosch Rexroth provides machines and systems of all sizes that are economical, precise, safe, and energy-efficient.

 Hydraulic Motor Solutions Range

The push for faster and better material production has made industrial hydraulic motor direct drives a key component in modern processes. Effective control of speed and torque is vital for productivity, significantly impacting quality, efficiency, controllability, and reliability.

Our industrial product portfolio offers cutting-edge solutions, including hydraulics, electric drives and controls, gear technology, linear motion, and assembly technology, all from a single source.

 Automotive Lift Repair Florida Hydraulic Motors 

– Axial Piston Motors  

  Axial piston motors, available in fixed or variable displacement models for open and closed circuits, are known for their robustness, reliability, and low noise emissions. These motors maintain high efficiency in medium and high-pressure applications.

– External Gear Motors  

  External gear motors provide a cost-effective alternative to rotary drives. These motors are designed for high pressures, are compact and lightweight, and can be either unidirectional or reversible to meet specific requirements.

– Radial Piston Motors  

  Our Hägglunds direct drive hydraulic motors offer unmatched quality and reliability. At Bosch Rexroth, innovation is driven by our customers’ challenges, and our goal is to deliver products that exceed expectations in performance and reliability.

Choosing the Right Motor for Your Hydraulic Application

When designing a Automotive Lift Repair Florida hydraulic system, it’s crucial to match the system’s overall efficiency with the desired performance. To achieve this, start by selecting the appropriate motor for your specific system requirements, followed by the pump. The motor you choose will influence the entire system’s design.

A Automotive Lift Repair Florida hydraulic motor is an actuator that, when properly integrated into a hydraulic system, produces rotary motion. Depending on the system design, the motor can operate in one or both directions. Although similar to pumps in design, a motor converts hydraulic flow into rotary motion, whereas a pump uses rotary motion to move hydraulic fluid.