In modern industrial fields, high current slip rings play a crucial role. Their unique structural design enables them to meet high current transmission demands, ensuring the stable operation of various electromechanical equipment.
The conductive rings, as one of the core components of high current slip rings, are primarily made from metals or alloys such as copper and silver, which have excellent conductivity and strong current carrying capacity. These materials effectively reduce resistance, minimizing energy loss and heat generation during current transmission. For example, when designing slip rings for large wind turbines, JINPAT uses high-purity copper for the conductive rings to handle currents exceeding 100A. At the same time, the size of high current slip rings is generally larger, with a larger cross-sectional area, aimed at reducing current density and preventing overheating due to excessive current. For instance, in the rotating power supply system of some industrial cranes, the diameter and thickness of the conductive rings far exceed those of standard slip rings, better distributing the current and avoiding localized overheating risks. Additionally, high-quality insulation materials such as high-performance ceramics or special plastics are used to separate the rings, ensuring excellent insulation properties and high temperature resistance, maintaining stable insulation under high current operating conditions, and preventing interference between different conductive rings while eliminating the risk of short circuits. However, excessively large areas may not be suitable for user assembly requirements. Therefore, JINPAT improves the slip ring design according to the customer's assembly space, ensuring performance while accommodating installation constraints.
The brushes are also vital for high current slip rings. Common materials for the brushes include graphite and metal graphite. Graphite brushes have good self-lubricating and conductive properties, reducing friction and wear between the brushes and the conductive rings, ensuring stable current transmission. Metal graphite brushes perform better in conductivity and wear resistance, allowing them to handle higher current loads. In high current slip rings, multiple brushes are typically used in parallel and evenly distributed around the circumference. For example, in the slip ring devices of large motor testing platforms, several groups of brushes are evenly distributed, significantly increasing the contact area, effectively reducing contact resistance, and enhancing the stability and reliability of current transmission.
Regarding operational performance, this slip ring supports a working voltage of 440V, meeting the power requirements of most ship propulsion systems. Its housing is made from high-strength aluminum alloy, providing excellent corrosion resistance and lightweight characteristics. The contact points are made from precious metals, ensuring good conductivity and wear resistance, which effectively reduces signal transmission losses and failure rates.
Heat dissipation is another key feature of high current slip rings. JINPAT's high current slip rings often adopt an open-frame structure, facilitating airflow between the conductive rings and brushes, promoting heat dissipation, and leaving space for the installation of heat sinks. For slip rings with significant heat generation, heat sinks, such as those made from aluminum or copper, are integrated to quickly transfer heat to the surrounding environment. For example, in large oil drilling platforms, heat sinks effectively control the temperature of the slip rings, ensuring long-term stable operation. The slip ring housings are designed with ventilation holes or channels to increase airflow and improve heat dissipation.
In terms of the casing and protective structure, high-strength metal materials, such as stainless steel and aluminum alloys, are used for the casing. These materials provide good mechanical strength and protection, shielding the internal components from external environmental interference while assisting with heat dissipation. The protection level can reach up to IP68, effectively preventing dust, water, and oil contaminants from entering, enabling stable operation in harsh environments such as those found in port cranes and mining machinery.
For the connection and fixation structure, reliable connection methods, such as bolt connections and welding, are used to ensure stable current transmission and mechanical fixation. The contact area and pressure at the connection points are rigorously designed and tested. Bearings or shaft sleeves are installed at both ends to support the rotating shaft, reducing vibration and wobble. Additional fasteners like retaining rings and nuts prevent the slip ring from shifting or loosening, ensuring stability during rotation.
Thanks to these structural features, JINPAT's high current slip rings are widely used in various industrial fields and are highly recognized by customers, providing a solid power transmission guarantee for the efficient operation of modern industry.