Mitsubishi Heavy Industries Compressor Corporation

Takashi Oda

Nobuyori Yagi

Daisuke Hirata

Akihiro Nakaniwa

Noriyuki Okada

Chihiro Myoren

Jo Masutani

Shuichi Yamashita

Toru Yoshimune

Hirofumi Higuchi

Hitoshi Shinohara

Koji Maeta

Yusuke Oishi

An inlet guide vane according to the disclosure includes a plurality of movable blades disposed at intervals in a circumferential direction of a rotor shaft and rotatable about a center axis extending in a radial direction of the rotor shaft. Each of the movable blades includes a first blade surface and a second blade surface extending in a direction connecting a leading edge and a trailing edge, and an inclined surface formed at a trailing end including the trailing edge and extending obliquely from the first blade surface to the second blade surface when viewed from the radial direction. The inclined surface is a flat surface whose cross-sectional shape viewed from the radial direction is inclined so as to be connected, at an acute angle, to the second blade surface at the trailing edge.

Inlet guide vane and rotary machine

A compressor includes a tilting pad bearing supporting a rotating shaft in a casing. The tilting pad bearing includes a bearing pad being in sliding contact with an outer circumferential surface of the rotating shaft and a pivot supporting the bearing pad in a swingable manner. The casing includes a groove portion having an annular shape recessed in the axial direction and extending in the circumferential direction, and a connection portion configured to connect an inner circumferential region of an inner side in the radial direction with respect to the groove portion to an outer circumferential region of the outer side in the radial direction with respect to the groove portion. The connection portion overlaps with the pivot as viewed from the axial direction.

Compressor

A compressor includes a rotation shaft which rotates around an axis, an impeller which press-feeds a fluid from one side in an axial direction toward an outward side in a radial direction by rotating together with the rotation shaft, a casing which surrounds the rotation shaft and the impeller and in which an exit flow channel for introducing a fluid press-fed from the impeller is formed, and an acoustic liner which is provided so as to face the inside of the exit flow channel in the casing. The acoustic liner has a plurality of open hole portions which are arranged with intervals therebetween, and acoustic spaces which communicate with the open hole portions and are independently provided for the respective open hole portions.

A method for manufacturing a compressor includes a step of installing a bundle having an O-ring on an outer peripheral surface inside a lower half casing so that a position of the O-ring in an axial direction coincides with a position of a lower half relief groove, a step of installing an upper half casing having an upper half relief groove on the lower half casing so that a position of the upper half relief groove in the axial direction coincides with the position of the O-ring, and a step of pressing the bundle in the axial direction to move the O-ring to a position away from the lower half relief groove and the upper half relief groove, and bringing the O-ring into contact with the inner peripheral surface of the lower half casing and the inner peripheral surface of the upper half casing.

Method for manufacturing compressor and compressor

The impeller of a rotating machine according to at least one embodiment of the present discloser is provided with: a disc; a cover disposed on an opposite side of a radial passage from the disc in an axial direction; and a blade disposed between the disc and the cover. In a dimensionless position along a camber line of the blade when the position of a leading edge of the blade is defined as 0 and the position of a trailing edge of the blade is defined as 1, a position where an angle difference between a first blade angle at a disc-side end portion of the blade and a second blade angle at a cover-side end portion of the blade is maximum is in a range of 0.5 or more and 1 or less. The first blade angle is &#x2212;10 degrees or more and 0 degrees or less at the position where the angle difference is maximum.

Impeller of rotating machine and rotating machine

A charge gas compressor train for an ethylene plant includes: a steam turbine; and a compression unit that is configured to be driven by the steam turbine to compress a charge gas. The compression unit includes a closed impeller at each impeller of a plurality of compression stages. An outer diameter of blades of the closed impeller at least at an initial stage of the plurality of compression stages is 1,400 to 1,800 mm. A maximum operating peripheral speed of the blades of the closed impeller at the initial stage at an outermost diameter position is 350 to 400 m/s. An output of the charge gas compressor train is 100 to 140 MW.

Charge gas compressor train for ethylene plant

An impeller of a rotating machine according to at least one embodiment includes: a disc; a cover disposed on an opposite side of a radial passage from the disc in an axial direction; and a blade disposed between the disc and the cover. A back surface of the disc has a recess extending in a circumferential direction in a radial range where the blade is disposed.

A vibrometer assembly including a vibrometer configured to measure vibration of a rotating shaft, includes: a probe of the vibrometer that is to be secured to a bearing device that supports the rotating shaft; a guide cylinder that is to be provided to a case so as to penetrate the case and protrude into the case, the case being located outside the bearing device; an attachment that is to be connected to the probe and inserted into the guide cylinder, and at least partially has a movable portion to allow the probe to be axially aligned with an inside securing portion in the bearing device; and an outside securing portion that secures the attachment to the guide cylinder or the case outside the case.

Vibrometer assembly, rotating machine, and vibrometer attachment method and removal method

A compressorincludes a basethat is fixed on a foundation F and supports a compressor main bodyfrom below in a vertical direction Dv, and a connecting part that detachably connects the compressor main bodyand the baseto each other. The compressor main bodyincludes a suction-side protruding pipeA and a discharge-side protruding pipeB that communicate between an inside and an outside of a casingand protrude outward from an outer peripheral surface of the casing. The baseincludes a support basehaving a support surfacefor supporting a lower part of the casing, and a suction portthat extends downward from the support basein the vertical direction Dv and has a through-hole into which the suction-side protruding pipeA is inserted.

A compressorincludes: a rotorhaving a rotary shaftrotating around an axis A, and an impellerprovided integrally with the rotary shaft; a casinghaving a casing main bodywhich surrounds the rotorand forms an annular inlet flow path Fsurrounding the axis A at a front stage of the impeller, and an inlet nozzlewhich introduces a fluid into the inlet flow path Ffrom an outer side in a radial direction Dr; an external pipeconnected to the inlet nozzleto introduce the fluid from the outside to the inlet nozzle; and a cleaning liquid supply partwhich is configured to supply a cleaning liquid from a plurality of locations in a circumferential direction of the external pipeto an interior of the external pipe

An inlet guide vane includes: a movable vane that has a vane main body and a shaft portion disposed in an end portion of the vane main body; a frame that has an insertion hole into which the shaft portion is to be inserted; a plurality of bearing portions that are arranged inside the insertion hole at an interval in a direction of a central axis of the shaft portion and that support the shaft portion to be rotatable around the central axis with respect to the frame; and a seal portion that is located inside the insertion hole between the plurality of bearing portions in the direction of the central axis and that seals an area between the insertion hole and the shaft portion.

Inlet guide vane and compressor

An impellerincludes a diskhaving a disk shape centered on an axis O, a plurality of bladesprovided on a disk main surfaceof the diskfacing a first side Dau in an axial direction Da at intervals in a circumferential direction around the axis O, and a coverthat covers the plurality of bladesfrom the first side Dau and gradually expands in diameter from the first side Dau toward a second side Dad in the axial direction. The coverhas a thick portionat a position distant from a first end portionpositioned closest to the first side, the thick portion having a thickness greater than the thickness of the first end portion

Impeller and rotating machine

A journal bearing including a plurality of bearing pads having pad surfaces which configured to slidably come into contact with an outer circumferential surface of a rotating shaft and disposed at intervals, a key member provided a part of a pad rear surface which faces radially outward in the bearing pad, having a curved surface which is curved around an axis parallel to the central axis, configured to extend to have the same cross-sectional shape, and formed of a material having a hardness higher than that of a material forming the pad rear surface of the bearing pad, and a housing having a support surface in contact with a part of the curved surface of the key member in the circumferential direction and configured to support the key member and the bearing pad to be swingable from an outer side in a radial direction.

Journal bearing and rotary machine

A gas seal structure includes: a first member with a first flow path where seal gas flows; a second member that is disposed to face the first member and includes a second flow path where the seal gas flowing from the first flow path flows toward a predetermined seal surface; and a communicating pipe disposed across the first and second flow paths. The communicating pipe includes: a first pipe end and a first seal member that are held within the first flow path, a second pipe end and a second seal member that are held within the second flow path, and a flexible pipe that connects the first pipe end and the second pipe end. A rigidity of the flexible pipe end is lower than a rigidity of each of the first pipe end and the second pipe end.

Gas seal structure and centrifugal compressor

A journal bearing is provided that supports a rotating shaft to be rotatable around a central axis and includes: a bearing main body that has a sliding contact surface that is in sliding contact with the rotating shaft, an outer circumferential surface that is directed outward in the radial direction to face a side opposite to the sliding contact surface, a recess that is recessed from an outer circumferential surface of the bearing main body inward in the radial direction, and a groove that continuously extends from the recess; a sensor main body that is housed in the recess; and a sensor wiring whose one end is connected to the sensor main body and in which a part thereof in a length direction is housed in the groove.

Growing community of inventors

Hiroshima, Japan

Takashi Oda