# US 2019/0376409 A1 · Inlet guide vane and compressor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0376409 A1 - Document ID: US20190376409A1 - Status: Published application - Kind: A1 - Application number: 16/475,883 - Filed: 2017-02-06 - Published: 2019-12-12 - Earliest claimed: 2017-02-06 - Assignees: Mitsubishi Heavy Industries Compressor Corporation - Applicants: Mitsubishi Heavy Industries Compressor Corporation - Inventors: Takashi Oda - Web page: https://patentgrep.com/patent/US20190376409A1 ## CPC - F01D 17/162: {for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line (F01D17/167 takes precedence)} - F04D 25/163: {driven by a common gearing arrangement} - F04D 29/057: hydrostatic; hydrodynamic - F04D 29/083: {especially adapted for elastic fluid pumps} - F04D 29/462: {especially adapted for elastic fluid pumps} - F04D 29/56: adjustable - F04D 29/563: {specially adapted for elastic fluid pumps} - F05D 2220/32: in gas turbines - F05D 2250/51: Inlet - F01D: NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES (machines or engines for liquids F03; non-positive displacement pumps F04D) - F04D: NON-POSITIVE-DISPLACEMENT PUMPS (engine fuel-injection pumps F02M; ion pumps H01J41/12; electrodynamic pumps H02K44/02) - F05D: INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS ## Abstract 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. ## Claims ### Claim 1 An inlet guide vane comprising: 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 so as 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 is configured to seal between the insertion hole and the shaft portion. ### Claim 2 (depends on 1) The inlet guide vane according to claim 1, wherein the seal portion includes a first seal member and a second seal member which are located at an interval in the direction of the central axis. ### Claim 3 (depends on 2) The inlet guide vane according to claim 2, wherein the first seal member and the second seal member have seal structures which are different from each other. ### Claim 4 (depends on 3) The inlet guide vane according to claim 3, wherein the first seal member is located at a position closer to the vane main body than the second seal member, and has sealing performance higher than that of the second seal member. ### Claim 5 (depends on 2) The inlet guide vane according to claim 2, wherein at least any one of a hole side recess portion formed on an inner peripheral surface of the insertion hole and recessed outward in a radial direction and a shaft side recess portion formed on an outer peripheral surface of the shaft portion and recessed inward in the radial direction is formed between the first seal member and the second seal member. ### Claim 6 (depends on 2) The inlet guide vane according to claim 2, further comprising: a sensor that is disposed between the first seal member and the second seal member, and that is configured to detect a fluid entering a clearance between an inner peripheral surface of the insertion hole and an outer peripheral surface of the shaft portion. ### Claim 7 (depends on 2) The inlet guide vane according to claim 2, further comprising: a sealing fluid supply unit that is disposed between the first seal member and the second seal member, and that is configured to supply a sealing fluid from the outside to a clearance between an inner peripheral surface of the insertion hole and an outer peripheral surface of the shaft portion. ### Claim 8 (depends on 1) The inlet guide vane according to claim 1, wherein the seal portion includes an elastic ring portion which is disposed outward in a radial direction of the shaft portion, which has an annular shape continuous in a circumferential direction, and which has a groove open toward a side where the vane main body is located with respect to the frame, and a biasing member which is disposed in the groove, and which is configured to cause an inner peripheral surface of the elastic ring portion to be biased inward in the radial direction toward the shaft portion. ### Claim 9 (depends on 1) A compressor comprising: the inlet guide vane according to claim 1. ### Claim 10 (depends on 3) The inlet guide vane according to claim 3, wherein at least any one of a hole side recess portion formed on an inner peripheral surface of the insertion hole and recessed outward in a radial direction and a shaft side recess portion formed on an outer peripheral surface of the shaft portion and recessed inward in the radial direction is formed between the first seal member and the second seal member. ### Claim 11 (depends on 4) The inlet guide vane according to claim 4, wherein at least any one of a hole side recess portion formed on an inner peripheral surface of the insertion hole and recessed outward in a radial direction and a shaft side recess portion formed on an outer peripheral surface of the shaft portion and recessed inward in the radial direction is formed between the first seal member and the second seal member. ### Claim 12 (depends on 3) The inlet guide vane according to claim 3, further comprising: a sensor that is disposed between the first seal member and the second seal member, and that is configured to detect a fluid entering a clearance between an inner peripheral surface of the insertion hole and an outer peripheral surface of the shaft portion. ### Claim 13 (depends on 4) The inlet guide vane according to claim 4, further comprising: a sensor that is disposed between the first seal member and the second seal member, and that is configured to detect a fluid entering a clearance between an inner peripheral surface of the insertion hole and an outer peripheral surface of the shaft portion. ### Claim 14 (depends on 5) The inlet guide vane according to claim 5, further comprising: a sensor that is disposed between the first seal member and the second seal member, and that is configured to detect a fluid entering a clearance between an inner peripheral surface of the insertion hole and an outer peripheral surface of the shaft portion. ### Claim 15 (depends on 10) The inlet guide vane according to claim 10, further comprising: a sensor that is disposed between the first seal member and the second seal member, and that is configured to detect a fluid entering a clearance between an inner peripheral surface of the insertion hole and an outer peripheral surface of the shaft portion. ### Claim 16 (depends on 11) The inlet guide vane according to claim 11, further comprising: a sensor that is disposed between the first seal member and the second seal member, and that is configured to detect a fluid entering a clearance between an inner peripheral surface of the insertion hole and an outer peripheral surface of the shaft portion.