OMP Hydraulic Motor

Shandong Heqi Hydraulic Machinery Equipment Co., Ltd., formerly known as Jining Gongcheng Hydraulic Machinery Factory, was founded in 1999. Since its establishment, it has been supplying hydraulic parts for Eaton Company. The quality index of its products has always been among the best among all suppliers of Eaton Company, and it has been awarded the honor of excellent quality supplier for many years.

OMP hydraulic motors are sophisticated mechanical devices that excel in converting the force of pressurised hydraulic fluids into both torque and angular movement, making them pivotal components in many industrial applications. These motors offer robust and precise performance, providing the driving force behind numerous hydraulic systems, from heavy machinery to automation processes, where their efficiency and reliability shine.

Gear-driven hydraulic motors
Gear-driven hydraulic motors have two sub-types; gear (slow speed) and epicyclic gear (high speed). By design, gear motors are compact, lightweight, and easy to maintain with a good oil suction capacity and impact resistance. On the other hand, they typically have a low starting torque, relatively low volumetric efficiency and input pressure which makes them most suitable for high speed, low torque applications.

Orbit (Gerotor/Geroler) motors
Orbit motors, or Gerotor/Geroler motors, can produce large torques at very slow speeds and operate on the orbit principle. The principle is based on an internal gear motor (rotor) rotating within a fixed external gear (stator). The motors are fitted with teeth and lobes, with spaces in between them for pressure chambers. As the pressurised hydraulic fluid flows into the chambers it creates an imbalance of pressure, generating a torque which is transmitted by the internal gear to the motor's output shaft, causing it to rotate (orbit).

Vane motors
Vane motors are simple in design, consisting of a housing with an eccentric bore and a rotor with vanes. The pressurised fluid creates an unbalanced force on the vanes, which causes the rotor to spin in a single direction, either clockwise or counterclockwise. Vane motors are small in size and particularly suited to vertical installations. They offer high torque at low speeds, stable operation, balanced flow, high input speed and low noise level.

Piston motors
Piston motors are available in two types; radial piston motors and axial piston motors. Radial piston motors are low speed and high torque, capable of generating a far higher torque than axial piston motors. Here, the pistons are arranged perpendicular to the axis of the crankshaft and they move in a linear motion, which is then converted to rotary motion. Axial piston motors generate a lower torque but have a higher speed range. In this type, the pistons are arranged in a circular pattern with housing that rotates about the axis by a shaft.

Motor Displacement
Motor displacement is the volume of fluid required to turn on the motor's motor output shaft through one revolution. Cubic inches and cubic centimeters per revolution are the common units that are used for motor displacement. Depending on the type of motor used and application, the displacement may be a fixed or variable quantity. In a fixed displacement motor the torque is constant. The speed of the motor can be varied when controlling the amount of input flow that gets into the motor. Variable torque and speed can be obtained if the motor used is a variable displacement motor.

Torque Output
The torque output of a motor can be expressed either in foot-pounds or inch-pounds. It's a function of the pressure in a system and the motor displacement. The specific pressure drops in a motor can be evaluated based on motor torque ratings given by the manufacturer.

Starting Torque
Starting torque is the ability of a hydraulic motor to make a load start moving. The starting torque indicates the amount of torque that a hydraulic motor can develop to make a load start turning. It can be expressed as a fraction or percentage of the theoretical torque. The starting torque for piston, vane, and common gear motors is usually between 70% to 80% of the theoretical value.

Breakaway Torque
Braking torque is the torque required to make a stationary load start rotating or turning. It requires more torque to make a load start moving than to keep the load moving.

Running Torque
Running torque is the torque associated with either the motor or the motor's load. When referring to the load, it shows the torque that keeps rotating. When referring to a motor it shows the actual torque a motor creates to keep the load turning. For common vane, piston, and gear motors, the running torque is approximately 90% of the theoretical value.

Mechanical Efficiency
Mechanical efficiency measures the effectiveness found in a machine or a mechanical system. This can be obtained from different variables and in hydraulic motors, torque usually is used. In hydraulic motors, mechanical efficiency refers to the ratio of the actual torque to be delivered to the theoretical torque.

Slippage in Motors
Slippage refers to the fluid that passes through the motor's internal parts without performing the intended work.

Construction Equipment: Hydraulic motors are commonly used in construction equipment such as excavators, loaders, and bulldozers to provide high torque and power for digging, lifting, and moving heavy loads.

Agriculture Equipment: Hydraulic motors are used in agriculture equipment such as tractors, harvesters, and sprayers to power various functions such as plowing, harvesting, and spraying.

Material Handling Equipment: Hydraulic motors are used in material handling equipment such as conveyor systems, cranes, and hoists to provide precise control over the movement and positioning of heavy loads.

Marine Equipment: Hydraulic motors are used in marine equipment such as winches, steering systems, and propulsion systems to provide high torque and power in harsh marine environments.

Aerospace Equipment: Hydraulic motors are used in aerospace equipment such as aircraft landing gear and control surfaces to provide precise control and reliable operation.

Industrial Equipment: Hydraulic motors are used in various industrial equipment such as machine tools, presses, and pumps to provide precise control over the movement and positioning of parts.

Mobile Equipment: Hydraulic motors are commonly used in mobile equipment such as trucks, buses, and trains to provide power for various functions such as steering, braking, and lifting.

Sample Your Oil
Regularly sample your oil for undesirable contaminants such as water, as it can help prevent the need for costly repairs in the future. Contamination is one of the main reasons why the hydraulic system can leak. As a result of the leakage, the hydraulic pumps can be blocked or accelerate the wear rate.
Take your oil for testing from a specific sample point to ensure consistency in measurement. Ideally, you are advised to take a sample from an active return line because testing from a stagnant source like a reservoir drain can result in inaccurate results.

Check Your Filter Indicators
A hydraulic filter indicator monitors the contamination caught by the filter. It displays the contamination level electrically, visually(using a pop-up indicator or a gauge), or both methods.
Consider replacing the filter when the indicator reads that it has reached its maximum acceptable contamination holding capacity. If left unmonitored, the filter can start leaking bypass fluid (if your hydraulic system was fitted with a bypass valve), making it vulnerable to more contamination. Check that the gauge style indicator is working correctly, or check the indicator with cold oil for an early warning.

Test Performance
If the performance level of your hydraulic system is slowly decreasing, it could be a result of being used for a more extended period without proper maintenance. Swiftly declining performance can be a precursor for catastrophic hydraulic system failure.
Closely monitor your system's oil and temperature levels, actuator speed, and case drain flow to predict failure in one of the systems. This will help prevent expensive repairs of the failed parts in the future.

Measure the Temperature Levels
Temperature levels on your hydraulic system can adversely affect your oil's viscosity. If your oil is above the normal working range of the system's components, it can reduce its lifespan.
For example, high viscosity can result in a temperature drop in the suction lines leading to cavitation. On the other hand, low viscosity reduces the thickness of the film's consistency between the components, resulting in wear and tear.

Maintain Cleanliness on Your Equipment
Knowing how to clean hydraulic motor parts is very important if you want yours to last long. Grime and dirt are generally harmless on the exterior of your equipment. However, it puts the internal parts at risk of being contaminated. Contaminants can enter the system when the hydraulic components are disconnected for relocation or maintenance during an oil change or replacing the filter system.