As a core actuator in hydraulic systems, the performance and service life of the Motor Orbital OMR 80 are directly influenced by its installation and commissioning. Proper installation and commissioning not only ensure stable motor operation but also effectively prevent malfunctions. The following outlines key considerations.
1. Mounting Base and Coaxiality Requirements
When installing the Motor Orbital OMR 80, the mounting bracket must possess sufficient rigidity. Insufficient bracket stiffness may cause motor vibration during pressure surges, potentially leading to housing fractures or internal component damage. The motor's output shaft must maintain strict coaxiality with the connected coupling or other transmission components. Significant coaxiality deviation generates additional radial forces, accelerating bearing and oil seal wear. This compromises operational reliability and shortens the motor's service life. Flange-mounted positioning should be prioritized during installation to better ensure coaxiality.
2. Pipeline Connection and Stress Elimination
When connecting the motor's inlet and return oil lines (especially steel pipes), pipeline stress must be completely eliminated. No additional forces from the pipelines are permitted to act upon the motor's oil ports. Such forces may cause motor housing deformation or interface damage. For drain lines (external drain lines), note that they must be connected separately to the tank and must not be connected in series with other return oil lines. Return oil resistance (back pressure) should generally be maintained below 0.3 MPa. Excessive back pressure may degrade the motor's technical performance. Although the shaft seal assembly of OMR motors can withstand higher pressures (maximum allowable back pressure up to 10 MPa), continuous operating back pressure should not exceed 5 MPa to ensure optimal service life and overall mechanical performance. If this value is exceeded, an external drain line must be connected to ensure the motor remains fully oil-filled. This drain line not only controls back pressure but also helps remove wear contaminants and provides some cooling effect.
3. Initial Lubrication and Load Running-in
Before starting the motor after installation, ensure the motor housing is completely filled with clean hydraulic oil through both oil ports. Manually rotate the output shaft to confirm no binding or other abnormalities before mounting. This is a critical step to prevent initial damage caused by dry friction. The motor must undergo running-in before full-load operation. It is recommended to run the motor unloaded for 10–15 minutes at less than 30% of maximum working pressure to purge air and initiate break-in. Then gradually increase pressure to approximately 30% of working pressure and continue break-in for 1 hour. This process facilitates proper mating of all moving components.
4. Selection and Cleanliness Control of Hydraulic Oil
The quality of hydraulic oil directly determines the performance and service life of the OMR 80 motor. We recommend using 46# anti-wear hydraulic oil. Oil viscosity is critical; under normal operating conditions, viscosity should not fall below 13 cSt (approximately 70 SUS), with the ideal viscosity range typically between 37-73 cSt. Oil temperature affects viscosity; note that the system oil temperature should be maintained within the normal range of 30°C to 60°C, with a maximum not exceeding 80°C. Oil cleanliness must be strictly controlled to meet the ISO cleanliness standard 18/13 (i.e., fewer than 2,500 particles larger than 5μm and fewer than 80 particles larger than 15μm per milliliter of oil). Therefore, installing a filter with a minimum rating of 30 microns in the system return line is essential. After approximately 200 hours or 50 hours of initial operation, consider replacing the hydraulic oil and cleaning the filter to remove contaminants generated by initial wear.
5. Other Critical Installation Details
If the driven component exhibits significant inertia and requires rapid braking or directional changes, install a safety valve (relief valve) in the return line to buffer pressure surges and prevent hydraulic shock damage to the motor.
Select inlet and outlet pipe diameters to ensure oil flow velocity does not exceed 5 meters per second.
Use copper or aluminum gaskets for port fittings, tightening to specified torque (e.g., 16±1 kg·m).
Proper installation and meticulous commissioning form the foundation for reliable operation of the Motor Orbital OMR 80. Adhering to these guidelines effectively mitigates early failures, enabling full utilization of its compact structure and high power density advantages.
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