B1002E Wind Turbine Generator Products
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Synergy of cutting-edge bearing technologies and machine tool technologies...JTEKT Established in 1935, "Koyo" has continued to evolve as a leading international bearing brand for over 70 years. Many kinds of bearings are manufactured that contribute to society such as the launch of the world's first ceramic bearings into market. The bearing business—based on an elemental technology that supports rotational motion—is often described as “the Industry's Heart” and the machine tool business, which is also called “the Mother of Machines”. Combining these two businesses, a new company was...

Wind turbine generator operating environment The wind energy moving wind turbine blades is changed into rotational energy at the rotor. That energy is then transferred through the main shaft and gearbox, and finally transformed into electricity by the generator. This is the main flow of the power train in a wind turbine generator. The load on the wind turbine generator (Fig. 1) varies widely from light to heavy according to the wind speed and direction, which changes every 0.1 sec, and this affects rotational speed as well (Fig. 2). Additionally, the operating temperatures can range from...

Bearings used in generators are subject to electric pitting—a phenomenon where the surface melts locally because sparks are generated as the electricity passes through the ultra-thin oil layer and into the bearing while it is rotating—and this is one of the factors that can lead to damage and reduce bearing service life. As a measure to prevent this, a ceramic ball with excellent insulation performance is used for as rolling elements, creating a hybrid ceramic bearing with good efficiency. Furthermore, compared to common bearings, the hybrid ceramic bearing does not reach high temperatures...

Gearbox bearings The gearbox is the component that increases the rotational speed transmitted via the main shaft up to the point where power can be generated. It consists of planet gears, a ring gear, a low-speed shaft, an intermediate shaft, and a high-speed shaft. Figure 7 shows a typical configuration for a one-stage-planetary gear and two-stage-parallel shafts (intermediate and high-speed shafts). In many cases, double-row cylindrical roller bearings are used for the planet gear section, but recently the utilisation of an integral-type bearing (Fig. 8) is on the increase. It is also...

Fig. 8 Example of a bearing arrangement for a planet gear section on a low-speed shaft JTEKT Products Utilised in Wind Turbine Generator Production and Control This large-scale horizontal machining centre is suited for the machining of large components, and offers maximum performance in class (palette sizes over 1,000mm square), size, speed and power. Maximum size: Work piece area diameter 2400mm x 1800mm Maximum speed: Rapid feeding 42m/min Maximum power: High-torque spindle ensures excellent cutting performance Utilised as the power pack for pitch brakes. Power packs reduce the rotor...

Offering Japanese quality with prestigious development and manufacturing techniques In recent years, the output capacity of wind turbine generators has continued to increase. However, growth in terms of the size of wind turbines has reached its limits. The current demand is for smaller and lighter wind turbines with equivalent or better power-generating capability, higher reliability, and maintenance-free systems. With this background, the performance requirements demanded from bearings have become increasingly diverse. Other important issues include consideration for characteristics such...

BEARING BUSINESS OPERATIONS HEAD OFFICE JTEKT CORPORATION NAGOYA HEAD OFFICE - JTEKT CORPORATION OSAKA HEAD OFFICE - Sales & Marketing Headquarters REGIONAL HEADQUARTERS JTEKT EUROPE BEARINGS B.V. JTEKT (CHINA) CO., LTD. - TECHNICAL CENTERS JTEKT CORPORATION EUROPEAN TECHNICAL CENTRE - JTEKT CORPORATION NORTH AMERICAN TECHNICAL CENTER JTEKT (CHINA) CO., LTD. TECHNICAL CENTER No.7-1, Meieki 4-chome, Nakamura-ku, Nagoya, Aichi 450-8515, JAPAN No.5-8, Minamisemba 3-chome, Chuo-ku, Osaka 542-8502, JAPAN — No.5-8, Minamisemba 3-chome. Chuo-ku, Osaka 542-8502, JAPAN — Markerkant 13-01,1314 AN...