Kawasaki Jukogyo Kabushiki Kaisha

Fukae Kogyo Kabushiki Kaisha

Masao Nakano

Yoshiyasu Nishikawa

Chosei Harada

Akira Iwata

Akihiro Furuichi

A double screen (42) including a cylindrical screen (18) and a conical screen (23) is attached to an upper casing (3) into which a revolution shaft (11) is inserted and is provided with a supply opening (2). A rotary blade 12 is arranged within an annular space (15) having a nearly V-shaped section between the cylindrical screen (18) and the conical screen (23) so as to rotate keeping a desired gap relative to the respective screen surfaces. Since the annular space (15) having the nearly V-shaped section is spaced apart from the revolution shaft (11), the rotary blade (12) rotates at a high circumferential speed even in the bottom portion of the annular space (15).

Apparatus for grinding and uniformizing grains and screen with annular

A blade of the fan wheel of a diagonal-flow fan, which blade should ideally have a shape of a twisted double-curvature or undevelopable surface, is formed from a portion of a cylinder, which has a single-curvature or developable surface. To realize the formation of a blade from the single-curvature surface, lines of intersection between a cylinder and a number of coaxial imaginary conical surfaces representing streamlines in the fan wheel are used as a basis for design.

Single curvature fan wheel of a diagonal flow fan

A blade of the fan wheel of a diagonal-flow fan, which blade should ideally have a shape of a twisted double curvature or undevelopable surface, is formed from a portion of a cylinder, which has a single-curvature or developable surface. To realize the formation of a blade from the single-curvature surface, lines of intersection between a cylinder and a number of coaxial imaginary conical surfaces representing streamlines in the fan wheel are used as a basis for design.

Single-curvature fan wheel of diagonal-flow fan

A blade in the fan wheel of a diagonal-flow fan, which blade should ideally have the contoured shape of a twisted double-curvature or undevelopable surface, is formed from a portion of a plate which has a flat planar surface. To develope the flat blade shape from a planar surface, lines of intersection between a plate and the streamsurfaces in the ideal fan wheel, which are represented by a number of coaxial imaginary conical surfaces, are used as a basis for design. The realized flat blade can then be orientated between the frustoconical main and side plates to form a diagonal-flow path similar in performance to the ideal blade of a twisted double-curvature surface.

Growing community of inventors

Kobe, Japan

Masao Nakano