# US 11,306,477 B2 · Streamlined body and streamlined apparatus for suppressing vibrations of enclosure and method for hoisting tower > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,306,477 B2 - Document ID: US11306477B2 - Status: Granted - Kind: B2 - Application number: 16/304,684 - Filed: 2018-02-26 - Published: 2021-07-22 - Granted: 2022-04-19 - Earliest claimed: 2017-09-11 - Assignees: Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. - Applicants: Beijing Goldwind Science & Creation Windpower Equipment Co., Ltd. - Inventors: Shengjun Ma - Web page: https://patentgrep.com/patent/US11306477B2 ## CPC - E04B 1/98: against vibrations or shocks (on foundations E02D31/08); against mechanical destruction, e.g. by air-raids (against incendiary damage only E04B1/94; finishing work therefor E04F; buildings withstanding earthquake or the like, shelters, arrangements of splintercatching walls E04H9/00) - E04H 12/342: {Arrangements for stacking tower sections on top of each other (E04H12/344 takes precedence)} - F03D 13/10: Assembly of wind motors; Arrangements for erecting wind motors - F03D 13/20: Arrangements for mounting or supporting wind motors; Masts or towers for wind motors - F03D 80/00: Details, components or accessories not provided for in groups F03D1/00 - F03D17/00 - F05B 2240/912: on a tower - F05B 2260/96: Preventing, counteracting or reducing vibration or noise - F05B 2260/964: by damping means - Y02E 10/72: Wind turbines with rotation axis in wind direction - Y02E 10/728: Onshore wind turbines - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) - E04H: BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL (foundations E02D) - F03D: WIND MOTORS - F05B: INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G - Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION ## Abstract A streamlined body, apparatus for suppressing vibrations of an enclosure, and a method for hoisting a tower are provided. The streamlined body surrounds the enclosure, and the streamlined body has a streamlined leading edge. The leading edge can faces towards the upwind incoming flow, to allow the upwind incoming flow to form a positive attack angle or a negative attack angle. In this solution, the enclosure is surrounded by the streamlined body, and when the upwind incoming flow flows around the enclosure to come into contact with the streamlined body, the aerodynamic configuration is changed, and the aerodynamic coefficient becomes small, thus the vibrations are reduced. Moreover, the direction and path of the airflow are changed, which disrupts the correlation of the upwind incoming flow near the streamlined body, and disrupts the consistence of frequencies of vortex shedding of the airflow at the streamlined body and other positions. ## Claims ### Claim 1 A streamlined body for suppressing vibrations of an enclosure surrounded by the streamlined body, the streamlined body comprising: a streamlined leading edge facing towards an upwind incoming flow to form the upwind incoming flow into a positive attack angle or a negative attack angle, wherein the streamlined body is configured to rise under an action of the upwind incoming flow. ### Claim 2 (depends on 1) The streamlined body for suppressing vibrations of the enclosure according to claim 1, wherein the streamlined body has an annular shape, a central through hole of the streamlined body has a lateral dimension, and the lateral dimension meets the following requirement: when the streamlined body is at the top of the enclosure, a gap between an inner wall of the central through hole of the streamlined body and the enclosure has a predetermined size for disrupting a raising force generated by the upwind incoming flow and achieving self-balancing of the streamlined body. ### Claim 3 (depends on 1) The streamlined body for suppressing vibrations of the enclosure according to claim 1, wherein the streamlined body has a closed annular shape. ### Claim 4 (depends on 3) The streamlined body for suppressing vibrations of the enclosure according to claim 3, wherein the streamlined body further comprises a tail portion opposite to the leading edge, and a distance from the leading edge to the enclosure is less than a distance from the tail portion to the enclosure. ### Claim 5 (depends on 4) The streamlined body for suppressing vibrations of the enclosure according to claim 4, wherein the leading edge of the streamlined body is gradually expanded to both sides, then gradually contracted rearwards, and then gradually expanded to form the tail portion. ### Claim 6 (depends on 5) The streamlined body for suppressing vibrations of the enclosure according to claim 5, wherein an outer edge of the tail portion is cambered. ### Claim 7 (depends on 1) The streamlined body for suppressing vibrations of the enclosure according to claim 1, wherein the streamlined body has an annular shape and has an annular cavity, a gas is filled in the annular cavity, and the gas has a density less than a density of air. ### Claim 8 (depends on 1) The streamlined body for suppressing vibrations of the enclosure according to claim 1, wherein an outer surface of an inner side of the streamlined body facing towards the enclosure is provided with a plurality of elastic bodies configured to squeeze the enclosure under the action of the upwind incoming flow, and a convergent-divergent flow channel of air flow is formed among the plurality of elastic bodies when the plurality of elastic bodies squeeze the enclosure. ### Claim 9 (depends on 8) The streamlined body for suppressing vibrations of the enclosure according to claim 8, wherein the streamlined body is provided with elastic spheres, and each of the elastic spheres has a portion exposed from the streamlined body to form an elastic body and another portion fixed in the streamlined body. ### Claim 10 (depends on 9) The streamlined body for suppressing vibrations of the enclosure according to claim 9, wherein the elastic spheres are distributed along a circumferential direction and a height direction of the outer surface of the inner side of the streamlined body, and a first part of the elastic spheres on a side facing towards the upwind incoming flow has a distribution density less than that of a second part of the elastic spheres at other positions. ### Claim 11 (depends on 8) The streamlined body for suppressing vibrations of the enclosure according to claim 8, wherein the streamlined body has an annular shape, and a central through hole of the streamlined body has a gradually decreased lateral dimension from bottom to top. ### Claim 12 (depends on 1) The streamlined body for suppressing vibrations of the enclosure according to claim 1, wherein the streamlined body has abutment surfaces, and has a complete annular shape after the abutment surfaces are butt-jointed and locked. ### Claim 13 (depends on 1) The streamlined body for suppressing vibrations of the enclosure according to claim 1, wherein the streamlined body is made of a material having airtightness and wear resistance, the streamlined body further comprises a tail portion opposite to the leading edge, the streamlined body has a symmetrical structure, and a symmetrical center line of the symmetrical structure connects a middle of the leading edge to a middle of the tail portion. ### Claim 14 A streamlined apparatus for suppressing vibrations of an enclosure, comprising: one or more tethers; and a streamlined body surrounding the enclosure and connected to the one or more tethers, the streamlined bod comprising a streamlined leading edge, the streamlined leading edge facing towards an upwind incoming flow to form the upwind incoming flow into a positive attack angle or a negative attack angle, wherein the streamlined body is configured to rise under an action of the upwind incoming flow. ### Claim 15 (depends on 14) The streamlined apparatus for suppressing vibrations of the enclosure according to claim 14, a wherein each tether has one end fixed to the enclosure or a ground and another end connected to the streamlined body. ### Claim 16 (depends on 15) The streamlined apparatus for suppressing vibrations of the enclosure according to claim 15, wherein: at least one segment of each tether is an elastic segment; or the one or more tethers comprises a first tether and a second tether, and the leading edge and a tail portion of the streamlined body are connected to the first tether and the second tether, respectively. ### Claim 17 (depends on 14) The streamlined apparatus for suppressing vibrations of the enclosure according to claim 14, wherein: the streamlined body has an annular shape and has an annular cavity, and a gas is filled inside the cavity; and the streamlined apparatus further comprises a recovery pipe and a gas collection device, the recovery pipe having one end connected to the streamlined body and another end connected to the gas collection device for recycling the gas in the streamlined body to the gas collection device. ### Claim 18 (depends on 17) The streamlined apparatus for suppressing vibrations of the enclosure according to claim 17, wherein the enclosure is a tower of a wind power generator set, a television tower or an anemometer tower, and the gas collection device is arranged within a nacelle at the top of the enclosure. ### Claim 19 (depends on 17) The streamlined apparatus for suppressing vibrations of the enclosure according to claim 17, wherein: the streamlined body has abutment surfaces, and has a complete annular shape after the abutment surfaces are butt-jointed and locked; the streamlined apparatus further comprises a wireless electronic lock, and the abutment surfaces are locked by the wireless electronic lock; and the streamlined apparatus further comprises a remote controller for wirelessly controlling the wireless electronic lock. ### Claim 20 (depends on 18) The streamlined apparatus for suppressing vibrations of the enclosure according to claim 18, wherein the nacelle comprises a recovery port, and the streamlined body is hoistable into the nacelle via the recovery port. ### Claim 21 A method for hoisting a tower, wherein the tower comprises a plurality of tower segments, and the tower is hoisted in segments during an installation process of the tower, the method comprising: surrounding a tower segment from the plurality of tower segments with a streamlined body in a streamlined apparatus during the installation process of the tower, wherein the streamlined apparatus comprises: the streamlined body comprising a streamlined leading edge facing towards an upwind incoming flow to form the upwind incoming flow into a positive attack angle or a negative attack angle, wherein the streamlined body is configured to rise under an action of the upwind incoming flow. ### Claim 22 (depends on 21) The method for hoisting the tower according to claim 21, wherein the tower segment is surrounded with the streamlined body when one or more other tower segments corresponding to an upper part of the tower are installed. ### Claim 23 (depends on 21) The method for hoisting the tower according to claim 21, further comprising removing the streamlined body from the tower after the installation process of the tower is finished and a nacelle is installed on the tower.