ROTATIONAL SHAFT LOWER END SUPPORT STRUCTURE OF VERTICAL AXIS WIND TURBINE

• Main Author: NAKAMURA KATSUSHIGE
• Format: Patent
• Language: English; Japanese
• Published: 24.03.2023
• Subjects: BEARINGS; BLASTING; CYLINDERS; ELEMENTS OR CRANKSHAFT MECHANISMS; ENGINEERING ELEMENTS AND UNITS; FLEXIBLE SHAFTS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS; HEATING; LIGHTING; MACHINES OR ENGINES FOR LIQUIDS; MECHANICAL ENGINEERING; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR; PISTONS; PRODUCING MECHANICAL POWER; ROTARY BODIES OTHER THAN GEARING ELEMENTS; SEALINGS; SHAFTS; THERMAL INSULATION IN GENERAL; WEAPONS; WIND MOTORS; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS

To provide a structure capable of supporting a lower end of a vertical rotational shaft with a radial bearing instead of a thrust bearing without providing a propeller.SOLUTION: Since a high-rigidity ball 10 is attached to a lower end 3b of a vertical rotational shaft 3, and the ball 10 is brought into contact with a high-rigidity receiving part 9 provided in a lower part 2b of a frame 2, the contact between the lower end 3b of the vertical rotational shaft 3 and the receiving part 9 becomes a point contact, and therefore, a rotational resistance is greatly reduced. Therefore, it is only necessary to provide a radial bearing 11 at the lower end 3b of the vertical rotational shaft 3, to eliminate the need to use a propeller that creates an air resistance and a thrust bearing that creates a large rotational resistance.SELECTED DRAWING: Figure 5 【課題】プロペラを設けずにスラスト軸受に代えてラジアル軸受で垂直回転軸の下端を支持できる構造を提供する。【解決手段】垂直回転軸３の下端３ｂに高剛性のボール１０を取付け、そのボール１０を架台２の下部２ｂに設けられた高剛性の受部９に当接させているため、垂直回転軸３の下端３ｂと受部９との当接が点接触となり回転抵抗が大幅に低減する。そのため垂直回転軸３の下端３ｂにはラジアル軸受１１を設けるだけで済み、空気抵抗となるプロペラや、大きな回転抵抗となるスラスト軸受を用いる必要がなくなる。【選択図】 図５