A hydraulic motor is a machine that changes hydraulic(fluid) energy into mechanical energy. Such motors are used extensively in equipment and machines that require high torque and can be controlled accurately. If you are looking for a hydraulic motor, particularly the ones from a reliable brand like Rexroth, Danfoss, Cessna, Webster, or Cassapa it is good to have a brief overview of the most common types. Here are the 3 most common types of hydraulic motors:
1. Piston Motors
Piston motors are very typical in industrial usage. One of their main features is managing high pressure and delivering a high torque. Such motors have a cylinder block with pistons placed inside. The fluid movement pushes the pistons, which in turn generates the rotational movement.
The main advantage of piston motors, in general, is their efficiency. These systems work satisfactorily under heavy loads and can keep the required rpm even with a change in pressure. That is the reason why these motors are applicable for machines that are stable and accurate in their work. Besides that, they are robust enough to withstand long operating hours without damaging wear.
Piston motors can be classified into two primary types. Motors with axial pistons feature pistons that run parallel to the shaft of the motor. Such a design is small in size and can be used for applications that require high speed. Piston motors that are of the radial type have their pistons set at a right angle to the shaft. These, in turn, offer very high torque at low speeds and thus can be matched with heavy machines.
Hydraulic pumps like Rexroth and others are typically used by those companies that choose piston motors as their first option. Such motors can be found in different kinds of construction equipment, machines for industrial purposes, as well as in other applications, where high power and effectiveness need to be maintained.
2. Gear Motors
Gear motors are less complex in terms of their design when compared to piston motors. They employ intermeshing gears to generate motion. These are typically compact and are serviceable with ease.
Gear motors fit just nicely into medium-pressure applications. However, precision of the control is not the main priority of these motors. They are stable for regular use and find their application quite frequently in conveyor systems, farming devices, and small industrial machines.
Even though gear motors cost less and are simpler to maintain, they are not as efficient at very high pressures where piston motors are superior. Their work declines when utilized in heavy-duty operations, which is the reason that piston motors are commonly chosen in those industrial settings.
3. Vane Motors
A vane motor consists of a rotor with sliding vanes that are either moved outward by centrifugal force or hydraulics. The fluid that comes into the motor is used to push the vanes, thus generating a rotation. It is worth mentioning that these motors are less noisy and guarantee a steady performance at average revolutions.
Such motors find most of their usage in areas where there is a need for medium torque, and an even speed is necessary. They are stable in work like small industrial machines, pumps, as well as some conveyors.
When compared to piston motors, vane motors are designed to operate at lower pressures and are not ideal for applications with high loads. Their efficiency is average; however, they do not generate high noise levels and vibrations during operation.
Conclusion
If you want to select the most appropriate hydraulic motor for your application or replace an existing hydraulic motor or pump, it is essential to know the different types. Piston motors are most preferred whenever there is a need for high pressure and high torque. On the other hand, gear motors are less complicated and can be used for many medium duty tasks. Vane motors are capable of operating quietly and smoothly at moderate pressures.
The hydraulic pumps from Rexroth are a popular choice for the industrial sector. These products provide companies with benefits such as effectiveness, dependability, as well as maintenance of their properties over time in challenging environments. Selecting the appropriate motor will largely be based on the particular needs of your equipment.
