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发明公开
CN104340348A 复合式螺桨扇叶构造 无效 - 撤回

复合式螺桨扇叶构造
摘要：
本发明提供一种复合式螺桨扇叶构造，具备至少一旋转轴及与该旋转轴对应设置的旋转侧面，在该旋转侧面上配置有复数个扇叶，其特征为：每一前述扇叶由复数个叶片单元所构成，其中任一相邻两扇叶的距离大于任一相邻两叶片单元间的距离，下游侧的叶片单元的吸力侧位于上游侧的叶片单元的压力侧；在任一前述扇叶的等半径断面中，下游侧的叶片单元的前缘端点的设置位置，在旋转轴向上，位于相邻上游侧叶片单元的尾缘端点之后，且其最大距离不超过该相邻上游侧叶片单元的半径的25%；而在旋转方向上，位于相邻上游侧叶片单元的首尾线压力面侧，且其旋向位置最大角度不超过(360°/2N)处，其中N为扇叶的数量。
摘要（英）：

The invention provides a combined propeller blade structure comprising at least one rotating shaft and a rotating side face corresponding to the rotating shaft. A plurality of blades are arranged on the rotating side face. The combined propeller blade structure is characterized in that each blade is composed of a plurality of blade units, the distance between any two adjacent blades is larger than that between any two adjacent blade units, and a suction side of each blade unit on the downstream side is located on a pressure side of the corresponding blade unit on the upstream side. In the equal-radius section of any one blade, in the rotational axial direction, the arrangement position of a front-edge endpoint of each blade unit on the downstream side is behind a rear-edge endpoint of the adjacent blade unit on the upstream side, and the maximum distance between the endpoints does not exceed 25% of the radius of the adjacent blade unit on the upstream side; in the rotational direction, the arrangement position of the front-edge endpoint of each blade unit on the downstream side is located on the front-rear line pressure side of the adjacent blade unit on the upstream side, and the maximum angle of the rotational position does not exceed (360 degrees/2N), wherein the N is the number of the blades.

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