Mitsubishi Heavy Industries Limited

Masamichi Iino

Yutaka Tanaka

Takashi Nakahara

Hideyuki Sakata

Shigeto Hirai

Takafumi Ogino

Taiki Asahara

Akihiro Toda

Takanori Okazaki

Akira Kirita

Toshihiro Sato

Takeshi Sano

Keiichi Meguro

Setsuo Tokunaga

A flow damper including a cylindrical vortex chamber, a small flow-rate pipe connected to a peripheral plate of the vortex chamber along a tangential direction, a large flow-rate pipe connected to the peripheral plate with a predetermined angle with respect to the small flow-rate pipe, an outlet pipe connected to an outlet formed in a central part of the vortex chamber, and a pressure equalization pipe with respective ends being connected to the peripheral plate on opposite sides of the outlet and at positions closer to a connection portion between the small flow-rate pipe and the large flow-rate pipe than positions facing each other, putting the outlet therebetween. The pressure equalization pipe is arranged with at least a part thereof is located at a higher position than a top plate of the vortex chamber, and an outgassing hole is provided at an uppermost part of the pressure equalization pipe.

Flow damper, pressure-accumulation and water-injection apparatus, and nuclear installation

To include a cylindrical vortex chamber, a small flow-rate pipeconnected to a peripheral plateC of the vortex chamberalong a tangential direction thereof, a large flow-rate pipeconnected to the peripheral plateC with a predetermined angle with respect to the small flow-rate pipe, an outlet pipe connected to an outletformed in a central part of the vortex chamber, and a straightening platethat is arranged in a part between the outletand the peripheral plateC of the vortex chamber, and when jets flow into the vortex chamberfrom the small flow-rate pipeand the large flow-rate pipe, straightens impinging jets from the small flow-rate pipeand from the large flow-rate pipehaving flowed into the vortex chambertoward the outlet

An impeller includes a disk, a long blade that is disposed at an interval in a circumferential direction on a disk surface on a first side in an axial direction of the disk, and that reaches an outer peripheral edge of the disk, and a short blade that is disposed between the long blades adjacent to each other on the disk surface, and that reaches the outer peripheral edge. A circumferential length of the short blade gradually increases as the short blade faces outward in the radial direction, and a circumferential length of the long blade in the outer peripheral edge is smaller than the circumferential length of the short blade in the outer peripheral edge.

Impeller and rotating machine

Growing community of inventors

Tokyo, Japan

Masamichi Iino