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Substantial total radial and axial loads can be supported by HR series bearings, especially the High-Capacity HR taper roller bearings. They have an internal structure that increases load capacity by accommodating more big rollers. These bearings, which consist of a cup (outer ring) or a cone-shaped structure (inner ring, rolling elements, and cage), are detachable, making it easier to mount and adjust clearances like preloaded or axial clearance during installation. They offer adjustable axial load capabilities appropriate for a range of design needs and come in different angles of contact (normal, medium, and steep). As a result, high-load, high-precision, and difficult applications are the main uses for HR Bearings (ตลับลูกปืน LM Guide HR, which is the term in Thai).
Power-electronics-driven systems, such as electric motors and drives controlled by inverter or pulse-width modulation (PWM), are the main category of niche electronics. This idea also applies to robotics, high-speed precision machines, and micro electric and mechanical systems (MEMS). Both stress from friction and electrical phenomenon, such as shafts voltages and bearing currents, can affect bearings in such situations. In contrast to purely mechanical systems, power-electronics systems exert electrical loads that can cause additional bearing damage in addition to normal mechanical wear, which makes bearings a problem.
Because HR series taper roller bearings can withstand high axial and radial loads and provide strong mechanical performance under electrical stresses, they are essential in power electronics-driven systems. They are effective versus physical shocks, dislocation, and vibrations because of its design, which has more and bigger rollers to improve load distribution. Because HR Bearings are separable, engineers may optimise the bearing’ effectiveness in high-precision or high-vibration situations by adjusting preload and axial clearance. This reduces deflection and increases dependability. Furthermore, because HR Bearings’ outstanding rigidity and capacity are crucial for sustaining loads while preserving positional accuracy, they are frequently used in electric motor designs. However, it is crucial to remember that the bearings’ design does not protect against electrical harm on its own, requiring further mitigation.
Techniques for Mitigating Bearing Currents within High-Reliability (HR) Bearing Application include a range of electrical approaches designed to minimise electrical discharge damage (EDM) in bearings. The application of insulated bearings, usually ceramic or hybrid, is one of the key strategies. These bearings limit power discharge via rolling components to raceways by breaking the conductive channel through the bearing. A typical preventive strategy for motors is shaft grounding, which uses grounded rings or grounding brush to provide a low-impedance channel for shafts voltage, safely diverting it to ground and avoiding the bearing. Additionally, by removing common-mode noise from inverters, ordinary-mode chokes or filters can greatly reduce high-frequency voltages that cause bearing currents.
