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Gearmotors are mechanical devices composed of an electric motor connected to a gearbox (or reducer) that reduces the rotational speed of the output shaft.
This reduction in speed allows for an increase in the available torque at the system’s output, enabling the use of gearmotors in various applications, such as conveyor belts, industrial automation, agricultural equipment, among others.
Gearmotors can perform various forms of motion, from simple rotations to more intricate and precise movements. Additionally, the design aims for high efficiency and longevity, offering a wide range of configuration options, including reduction ratio, gear type, dimensions, power, and other factors, whose adaptations depend on the user’s requirements.
Below is a detailed list of the main components of a gearmotor and their respective functions:
Basic structure of a parallel shaft gearbox
The maintenance and inspection stage in gearmotors is important and crucial, as good practices contribute to prolonging the asset’s lifespan. Additionally, proper care minimizes the risk of unplanned downtime and can detect early failures.
Watch the recording of the Inspection Portal’s live stream on the subject:
When it comes to maintenance, an important stage is the assembly stage. Thus, it is essential to follow some recommendations to avoid major technical problems later on, including:
ATTENTION: The housing of the gear motor is made of cast material, so it may break if the mounting elements are excessively tightened.
Regarding inspection, it is crucial to establish a route for sensitive inspection, especially for gear motors with high criticality. However, in addition to the sensitive inspection route, it is recommended to use predictive techniques, such as oil analysis and vibration analysis, to assist in the effective monitoring of components and identify potential failures early on.
Read also: Sensitive Inspection Route: everything you need to know (dynamox.net)
Regarding sensitive inspection, small technical inspections can be performed using the senses to identify non-conformities. Thus, within the checks performed by visual inspection are:
Furthermore, Dynamox has an inspection routines module (DynaSens). With it, the data collected in the field becomes a precise and reliable source for assertive maintenance decisions. Learn more about it here.
Lubrication in any equipment is a crucial aspect, and in gear motors, it is no different. Since the lubricant performs fundamental functions, such as reducing friction and assisting in the dissipation of heat generated during movement and contact of gears.
Here are the points of attention that the maintenance/lubrication team should have with gearmotors:
1 – Type of Lubricant – it is essential to follow the manufacturer’s recommendation. Therefore, any modification in lubrication should occur only after a thorough technical study.
2 – Correct lubricant level: checking the oil level at the beginning and during operation is especially important, ensuring that the oil quantity in the component is adequate.
Older assets had the dipstick type oil level indicator. In them, it is necessary to remove the dipstick to check the oil level, which allows possible contamination in the system. Fortunately, nowadays, there are more efficient alternatives (such as 3D level indicators) that do not expose the machine to contaminants.
3 – Breather – the breather must be installed and fixed correctly. Therefore, it is essential to ensure that it is positioned correctly, which may vary depending on the gear motor installation. Installing the breather in the wrong position can lead to increased internal pressure, causing damage to seals and, consequently, lubricating oil leaks.
4 – Lubrication plan – it is important to have a lubrication plan and, therefore, check the oil level. Thus, it is also essential for this lubrication plan to establish an adequate inspection routine on the breathers to check their saturation level or identify any obstruction.
Gearmotors are, therefore, robust equipment that, when well cared for, can operate for long periods without major issues. However, for this to happen, it is essential to have an appropriate inspection and lubrication plan, a trained technical team, and also to use predictive maintenance techniques to assist in monitoring these assets.
Want to improve condition monitoring in your industry? Then, get to know Dynamox’s solution!
Text written in partnership with the Portal da Inspeção.
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