# US 12,180,974 B2 · Variable inlet guide vane apparatus and compressor including same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,180,974 B2 - Document ID: US12180974B2 - Status: Granted - Kind: B2 - Application number: 17/656,260 - Filed: 2022-03-24 - Published: 2023-09-28 - Granted: 2024-12-31 - Earliest claimed: 2022-03-24 - Assignees: Copeland Corporation - Applicants: Copeland LP - Inventors: Cody N. Kahan; Cyril A. Duffala - Web page: https://patentgrep.com/patent/US12180974B2 ## CPC - F04D 29/462: {especially adapted for elastic fluid pumps} - F04D 17/10: for compressing or evacuating - F04D 29/056: Bearings - F04D 29/063: specially adapted for elastic fluid pumps - F04D 29/4206: {especially adapted for elastic fluid pumps} - F04D 29/4213: {suction ports} - F04D 29/624: {especially adapted for elastic fluid pumps} - F05D 2250/51: Inlet - F05D 2260/4031: as in toothed gearing - 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 A variable inlet guide vane apparatus for imparting a motion to a fluid flow entering into a compressor. The variable inlet guide vane apparatus includes a housing defining a fluid flow passageway. The housing includes a first and second housing portion, a ring gear, and a plurality of guide vanes. The guide vanes include a stem, a gear, and a vane. The stem is disposed between the first and second housing portions, the vane is arranged within the fluid flow passageway, and the gears are arranged exterior the housing. ## Claims ### Claim 1 An inlet guide vane apparatus, the apparatus comprising: a housing assembly defining a fluid flow passageway, the housing assembly comprising: a first housing portion; and a second housing portion connected to and positioned axially upstream of the first housing portion, wherein the first and second housing portions cooperatively define a plurality of guide vane openings extending radially through the housing assembly and into the fluid flow passageway; a ring gear rotatable relative to the housing assembly and restricted from axial translation in a first direction relative to the housing assembly; and a plurality of guide vanes connected to the housing assembly, each guide vane comprising: a stem extending from a first end to a second end, wherein at least a portion of the stem is disposed within one of the guide vane openings; a vane gear disposed at the first end of the stem and operably connected to the ring gear, wherein the ring gear and the vane gear are accessible from an exterior of the housing assembly; and a vane disposed at the second end of the stem and within the fluid flow passageway of the housing assembly, wherein each of the guide vanes is rotatable relative to the housing assembly such that an orientation of the vane within the fluid flow passageway is selectively adjustable, wherein connection of the first housing portion to the second housing portion operably connects the vane gear of each guide vane to the ring gear. ### Claim 2 (depends on 1) The inlet guide vane apparatus of claim 1, wherein the first housing portion defines a plurality of first channels and the second housing portion defines a plurality of second channels, wherein each of the first channels is aligned with one of the second channels such that the first and second channels cooperatively define the plurality of guide vane openings. ### Claim 3 (depends on 1) The inlet guide vane apparatus of claim 1 further comprising a bearing, wherein the ring gear is rotatably connected to the housing assembly by the bearing. ### Claim 4 (depends on 3) The inlet guide vane apparatus of claim 3, wherein the bearing is a self-lubricating bearing. ### Claim 5 (depends on 1) The inlet guide vane apparatus of claim 1, wherein the plurality of guide vanes includes a drive guide vane and a plurality of follower guide vanes. ### Claim 6 (depends on 5) The inlet guide vane apparatus of claim 5, wherein the drive guide vane is operably connected to a motor operable to rotate the drive guide vane, wherein rotation of the drive guide vane drives rotation of the ring gear and rotation of the ring gear imparts rotation to the plurality of follower guide vanes. ### Claim 7 (depends on 1) The inlet guide vane apparatus of claim 1, wherein each guide vane includes a stop extending radially outward from the stem, and wherein at least one of the first housing portion and the second housing portion defines a plurality of slots, each slot extending from a first stop surface to a second stop surface and being sized and shaped to receive one of the stops therein. ### Claim 8 (depends on 6) The inlet guide vane apparatus of claim 6, wherein the motor is a stepper motor, and wherein contact between the stop and at least one of the first and second stop surfaces stops rotation of the plurality of guide vanes and stops the motor. ### Claim 9 (depends on 1) The inlet guide vane apparatus of claim 1, wherein the vane gear of each guide vane is removably connected to the guide vane. ### Claim 10 A compressor comprising: a compressor housing including an inlet; a driveshaft rotatably supported within the compressor housing; an impeller connected to the driveshaft and operable to impart kinetic energy to incoming refrigerant gas upon rotation of the driveshaft; an inlet guide vane apparatus connected to the compressor inlet, the inlet guide vane apparatus comprising: a housing assembly defining a fluid flow passageway, the housing assembly comprising: a first housing portion; and a second housing portion connected to and positioned axially upstream of the first housing portion, wherein the first and second housing portions cooperatively define a plurality of guide vane openings extending radially through the housing assembly and into the fluid flow passageway; a ring gear rotatable relative to the housing assembly and restricted from axial translation in a first direction relative to the housing assembly; and a plurality of guide vanes connected to the housing assembly, each guide vane comprising: a vane gear disposed at the first end of the stem and operably connected to the ring gear, wherein the ring gear and the vane gear are accessible from an exterior of the housing assembly; and a vane disposed at the second end of the stem and within the fluid flow passageway of the housing assembly, wherein each of the guide vanes is rotatable relative to the housing assembly such that an orientation of the vane within the fluid flow passageway is selectively adjustable, wherein connection of the first housing portion to the second housing portion operably connects the vane gear of each guide vane to the ring gear. ### Claim 11 (depends on 10) The compressor of claim 10, wherein the first housing portion defines a plurality of first channels and the second housing portion defines a plurality of second channels, wherein each of the first channels is aligned with one of the second channels such that the first and second channels cooperatively form the plurality of guide vane openings. ### Claim 12 (depends on 10) The compressor of claim 10, further comprising a bearing, wherein the ring gear is rotatably connected to the housing assembly by the bearing. ### Claim 13 (depends on 12) The compressor of claim 12, wherein the bearing is a self-lubricating bearing. ### Claim 14 (depends on 10) The compressor of claim 10, wherein the plurality of guide vanes includes a drive guide vane and a plurality of follower guide vanes. ### Claim 15 (depends on 14) The compressor of claim 14, wherein the drive guide vane is operably connected to a motor operable to rotate the drive guide vane, wherein rotation of the drive guide vane drives rotation of the ring gear and rotation of the ring gear imparts rotation to the plurality of follower guide vanes. ### Claim 16 (depends on 10) The compressor of claim 10, wherein each guide vane includes a stop, and wherein at least one of the first housing portion and the second housing portion defines a plurality of slots, each slot extending from a first stop surface to a second stop surface and being sized and shaped to receive one of the stops therein. ### Claim 17 A method of assembling an inlet guide vane apparatus including a housing assembly and a plurality of guide vanes, wherein the housing assembly includes a first housing portion and a second housing portion, and wherein each guide vane includes a stem extending from a first end to a second end, a first vane gear disposed at the first end of the stem, and a vane disposed at the second end of the stem, the method comprising: rotatably connecting a ring gear to the first housing portion; connecting the first housing portion to the second housing portion such that the second housing portion is positioned axially upstream of the first housing portion, and such that the first and second housing portions cooperatively define a plurality of guide vane openings extending radially through the housing assembly; and positioning the plurality of guide vanes relative to the second housing portion such that, when the first housing portion is connected to the second housing portion, at least a portion of the stem of each guide vane is disposed within one of the guide vane openings, wherein the ring gear and the vane gear are accessible to an operator from an exterior of the housing assembly, wherein connecting the first housing portion to the second housing portion operably connects the first vane gear of each guide vane to the ring gear. ### Claim 18 (depends on 17) The method of claim 17, wherein the first vane gear of each guide vane is removably connected to the stem, wherein the method further comprises: removing the first vane gear from the stem of one of the guide vanes; and connecting a second vane gear to the stem of the one guide vane, without disconnecting the first housing portion from the second housing portion.