Mitsubishi Heavy Industries Compressor Corporation

Masaki Shakuda

Masahiro Hayashi

Takeshi Kaneko

Kazutoshi Yokoo

Tomoaki Takeda

Ryo Egami

Shinichiro Tokuyama

A seal gas supply control method according to the present invention comprises a step for detecting a pressure difference between an internal pressure of a rotary machine and a supply pressure of a seal gas with respect to a dry gas seal portion, a step for adjusting an opening degree of a seal gas supply valve on the basis of the detected pressure difference between the internal pressure and the supply pressure, and a step for detecting a vent pressure for discharging the seal gas evacuated from the dry gas seal portion to the outside. The seal gas supply control method fully opens the seal gas supply valve when the detected vent pressure satisfies a predetermined condition.

Seal gas supply control method, seal gas supply control apparatus, and rotary machine

A centrifugal compressor includes a housinghaving a facing surfacefacing the outer peripheral surface of a cover, a seal memberforming a clearance with the outer peripheral surface of the cover, an inclined holeformed in the seal member, extending at an angle to the side opposite to a direction of rotation, and having an opening portionopening at a position facing the outer peripheral surface of the cover, a first finprovided on the seal memberand protruding toward the outer peripheral surface of the cover, and a communication flow path portionformed in the housing, having an introduction portopening at a position facing the outer peripheral surface of the cover, and communicating with the inclined hole

Centrifugal compressor and seal unit

A rotary machine system includes: a rotary machine including a gas seal portion; a gas seal device connected to the rotary machine and that supplies a seal gas to the gas seal portion; and a connecting pipe that connects the gas seal portion and the gas seal device. The rotary machine includes a casing through which a working fluid flows; a rotatable rotary shaft; and the gas seal portion that seals the working fluid by the seal gas having a pressure higher than a pressure of the working fluid in the casing. The gas seal device includes: a seal gas supply pipe through which the seal gas delivered to the connecting pipe flows; a pressure regulating valve provided in the seal gas supply pipe and that adjusts the pressure of the seal gas supplied to the gas seal portion; and a control part.

Rotary machine system

A rotary machine system includes: a rotary machine including a gas seal portion; a gas seal device connected to the rotary machine and that supplies a seal gas to the gas seal portion; a pressure sensor that detects a pressure of the seal gas; a vent portion that discharges the seal gas discharged from the gas seal portion; and a vent pressure sensor that detects a pressure in the vent portion. The rotary machine includes: a casing through which a working fluid flows; a rotatable rotary shaft that passes; and the gas seal portion provided between the casing and the rotary shaft and that seals the working fluid by the seal gas having a pressure higher than a pressure of the working fluid in the casing. The gas seal device includes: a pressure regulating valve; and a control part that controls the pressure regulating valve.

Growing community of inventors

Hiroshima, Japan

Masaki Shakuda