WO2022203178A1 - 방폭 기능을 구비하는 터보 압축기 - Google Patents
방폭 기능을 구비하는 터보 압축기 Download PDFInfo
- Publication number
- WO2022203178A1 WO2022203178A1 PCT/KR2022/001090 KR2022001090W WO2022203178A1 WO 2022203178 A1 WO2022203178 A1 WO 2022203178A1 KR 2022001090 W KR2022001090 W KR 2022001090W WO 2022203178 A1 WO2022203178 A1 WO 2022203178A1
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- WIPO (PCT)
- Prior art keywords
- compressed gas
- cooling
- impeller
- motor
- turbocompressor
- Prior art date
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- 239000007789 gas Substances 0.000 claims abstract description 109
- 239000000112 cooling gas Substances 0.000 claims abstract description 25
- 238000007906 compression Methods 0.000 claims abstract description 13
- 230000006835 compression Effects 0.000 claims abstract description 12
- 238000001816 cooling Methods 0.000 claims description 74
- 238000000034 method Methods 0.000 claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 10
- 238000006243 chemical reaction Methods 0.000 claims description 9
- 239000002184 metal Substances 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000004880 explosion Methods 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract 1
- 230000004308 accommodation Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 5
- 239000002360 explosive Substances 0.000 description 4
- 239000011888 foil Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000003754 machining Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 230000001902 propagating effect Effects 0.000 description 2
- 238000005273 aeration Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000010865 sewage Substances 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/584—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps cooling or heating the machine
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/10—Centrifugal pumps for compressing or evacuating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5826—Cooling at least part of the working fluid in a heat exchanger
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/051—Axial thrust balancing
- F04D29/0513—Axial thrust balancing hydrostatic; hydrodynamic thrust bearings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/056—Bearings
- F04D29/057—Bearings hydrostatic; hydrodynamic
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2210/00—Working fluids
- F05D2210/10—Kind or type
- F05D2210/12—Kind or type gaseous, i.e. compressible
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/51—Inlet
Definitions
- the present invention relates to a turbocompressor, and more particularly, to an explosion-proof turbocompressor capable of increasing service life and reducing vibration noise by means of an air bearing, and capable of rapidly cooling the resulting flame even if an internal explosion occurs and then discharging it to the outside will be.
- a turbo compressor or turbo blower is a centrifugal pump that sucks in air or gas from the outside by rotating an impeller at high speed, compresses it, and then blows it to the outside. It is widely used for aeration in sewage treatment plants, etc., and recently, it is also used for industrial processes and automobile mounting.
- Such an explosion-proof turbocompressor must satisfy the design requirement that an explosion does not occur by propagating to the explosive gas even if a flame is generated from various flame sources existing inside the turbocompressor.
- a rolling bearing to support the rotating shaft, a fully enclosed explosion-proof sealing that prevents internal flames from propagating to the outside was used.
- the present invention has been devised to solve the above problem, and its purpose is to increase the service life and reduce vibration noise due to the air bearing, and at the same time, even if an internal explosion occurs, the resulting flame can be rapidly cooled and then discharged to the outside. This is to provide an explosion-proof turbocompressor with an improved structure.
- a turbocompressor capable of supplying a compressed gas to the outside, comprising: a compressed gas inlet through which the gas is sucked; an impeller for compressing the gas introduced through the compressed gas inlet; a compressed gas outlet through which the gas compressed by the impeller is discharged to the outside; a compression unit having a compressed gas flow path connected from the compressed gas inlet to the compressed gas outlet;
- a compressor In order to rotate the impeller, one end of the motor having a rotating shaft coupled to the impeller; a housing having a motor accommodating space for accommodating the motor; a cooler provided to pass through the motor accommodating space and configured to allow continuous circulation of the cooling gas accommodated therein;
- a bearing supporting a radial load or an axial load of the rotating shaft, at least one air bearing is provided;
- a non-contact type explosion-proof unit having a width less than a predetermined value and a length greater than or equal to a predetermined value as a passage provided so that the flame generated in the inner
- the inner space of the housing and the compressed gas flow path communicate with each other.
- the non-contact type explosion-proof unit may be a cylindrical space formed in cooperation with a first surface formed on the outer peripheral surface of one end of the rotation shaft and the second surface formed on the housing.
- the non-contact type explosion-proof unit is a cone-shaped space formed in cooperation with a first surface formed on the outer peripheral surface of one end of the rotation shaft and a second surface formed on the housing, the cone-shaped space portion, the impeller and a predetermined It is located within a distance, and is preferably arranged in a direction in which the radius becomes smaller as it goes toward the impeller.
- the non-contact explosion-proof unit may have one shape selected from the group consisting of a step shape and a wave shape so as to increase a distance through which a flame generated in the inner space of the housing passes.
- a cooling fan for forcibly flowing the cooling gas accommodated in the cooling furnace.
- the cooling fan is disposed at the rear end of the rotating shaft, and preferably rotates by the rotational force of the rotating shaft.
- a cooling fin capable of increasing heat exchange efficiency is preferably provided between the compressed gas passage and the cooling passage.
- an electrical converter for controlling the motor is included, wherein the electrical converter includes a metal case capable of airtightly accommodating an internal heating component, and the case is capable of exchanging heat with the housing. It is preferable to maintain a contact state.
- a cooling fin capable of increasing heat exchange efficiency is provided between the compressed gas flow path and the cooling passage, and the case is preferably disposed at a position capable of exchanging heat with the cooling fin.
- a turbo compressor capable of supplying a compressed gas to the outside, comprising: a compression unit having an impeller for compressing gas introduced through a compressed gas inlet; In order to rotate the impeller, one end of the motor having a rotating shaft coupled to the impeller; a housing having a motor accommodating space for accommodating the motor; a cooler provided to pass through the motor accommodating space and configured to allow continuous circulation of the cooling gas accommodated therein; A bearing supporting a radial load or an axial load of the rotating shaft, at least one air bearing is provided; A non-contact type explosion-proof unit having a width less than a predetermined value and a length greater than or equal to a predetermined value as a passage provided so that the flame generated in the inner space of the housing passes and is cooled and then discharged to the outside; includes, and the compressed gas flow path is spatially separated from the cooling passage, so that the gas inside the compressed gas passage cannot penetrate into the cooling passage, the service life is increased and vibration noise is reduced by the air bearing, and at the
- FIG. 1 is a cross-sectional view of a turbocompressor according to an embodiment of the present invention.
- FIG. 2 is a partially enlarged view of the turbocompressor shown in FIG. 1 .
- FIG. 3 is an enlarged view of the vicinity of an impeller of the turbocompressor shown in FIG. 1 .
- FIG. 4 is an enlarged view of the non-contact explosion-proof unit shown in FIG. 1 .
- FIG. 5 is an enlarged view showing a second embodiment of the non-contact type explosion-proof unit.
- FIG. 6 is an enlarged view showing a third embodiment of the non-contact type explosion-proof unit.
- FIG. 7 is a cross-sectional view taken along line VII-VII of the turbocompressor shown in FIG. 3 of the present invention.
- FIG. 1 is a cross-sectional view of a turbocompressor according to an embodiment of the present invention
- FIG. 2 is a partially enlarged view of the turbocompressor shown in FIG.
- FIG. 3 is an enlarged view of the vicinity of an impeller of the turbocompressor shown in FIG. 1 .
- the turbocompressor 100 is a centrifugal pump that sucks and compresses external gas by rotating an impeller at high speed and then blows it to the outside. , also called a so-called turbo compressor or turbo blower.
- the turbocompressor 100 includes a housing 10 , a compression unit 20 , a motor 30 , an air cooling unit 40 , a non-contact explosion-proof unit 50 , and an electric conversion device 60 .
- the gas to be compressed is air containing an explosive material.
- the housing 10 is a metal housing, and includes an outer housing 11 and an inner housing 12 .
- the outer housing 11 is a cylindrical member having a cross section having a first central axis C1 as a center of a circle, and extends along the first central axis C1.
- the inner housing 12 is a cylindrical member having a motor accommodating space 13 therein, and has a cross section with the first central axis C1 as the center of the circle, and the first central axis C1 is is extended accordingly.
- the motor accommodation space 13 is a space having a shape corresponding to the motor 30 to accommodate the motor 30 to be described later.
- the outer housing 11 has a shape corresponding to the inner housing 12 so as to accommodate the inner housing 12 in a surrounding state.
- the outer housing 11 has an open left end and a right end to which a rear cover 23 of the compression unit 20 to be described later is coupled.
- the inner surface of the outer housing 11 and the outer surface of the inner housing 12 face each other while being spaced apart by a predetermined distance.
- a compressed gas flow path 26 to be described later is formed between the inner surface of the outer housing 11 and the outer surface of the inner housing 12 .
- a compressed gas inlet 24 is formed at the left end of the outer housing 11 so that external air can be sucked into the compressed gas flow path 26 .
- the compressed gas inlet 24 is a circular annular hole in which the inner surface of the outer housing 11 and the outer surface of the inner housing 12 cooperate with each other.
- a cooling fin 121 capable of increasing heat exchange efficiency is formed on the outer circumferential surface of the inner housing 12 .
- the cooling fin 121 includes a cooling gas flow G flowing along a cooling passage 41 provided in the inner housing 12 and a compressed gas flow F flowing along the compressed gas passage 26 . It is a cooling fin to increase the heat exchange efficiency between them.
- the cooling fins 121 protrude from the outer peripheral surface of the inner housing 12 in the radial direction of the inner housing 12 and extend along the first central axis C1.
- a plurality of cooling fins 121 are provided and are arranged in a plurality in a circumferential direction of the inner housing 12 in a state in which they are spaced apart from each other.
- a portion of the distal end of the cooling fin 121 is maintained in contact with the inner surface of the outer housing 11 as shown in FIG. 1 .
- the compressed gas flow path 26 is arranged in a state in which a plurality of spatially separated by the cooling fins 121 along the circumferential direction of the first central axis C1.
- At least one bearing mounting part 122 provided to mount a journal bearing 34 and a thrust bearing 35 to be described later is provided.
- the inner housing 12 has a substantially airtight structure in which the gas inside does not leak to the outside, except for the portion through which the rotation shaft 31 passes and the portion where the non-contact explosion-proof unit 50 is provided, which will be described later. be prepared
- the compression unit 20 is a device for sucking in and compressing external air, and includes an impeller 21 , a front cover 22 , and a rear cover 23 .
- the impeller 21 is a wheel having a plurality of blades having a curved surface as a main configuration of the centrifugal pump, and is mounted to enable high-speed rotation.
- the front cover 22 is a metal member disposed in front of the impeller 21 , and is provided to cover the front end of the rotation shaft 31 , which will be described later.
- the rear cover 23 is a metal member disposed behind the impeller 21 , and is coupled to the housing 10 by a bolt or screw. In this embodiment, the rear cover 23 is coupled to the outer housing 11 .
- the rear cover 23 is provided in the form of a scroll casing having a flow path formed so that the air passing through the impeller 21 can flow in a spiral shape.
- the impeller 21 compresses the air introduced through the compressed gas inlet 24 , and the air compressed by the impeller 21 is discharged to the outside through the compressed gas outlet 25 as shown in FIG. 1 . is emitted
- the air sucked in through the compressed gas inlet 24 is compressed while moving along the compressed gas flow path 26 connected from the compressed gas inlet 24 to the compressed gas outlet 25 .
- the motor 30 is an electric motor that generates a rotational force, and is a device for supplying a high-speed rotational force to the impeller 21 .
- the motor 30 includes a rotating shaft 31 , a stator 32 , a rotor 33 , and a bearing 34 .
- the rotation shaft 31 is a rod member extending along the first central axis C1 , and a front end portion thereof is non-rotatably coupled to the impeller 21 in order to rotate the impeller 21 .
- a thrust bearing runner (not shown) to which a thrust bearing 35 to be described later can be coupled is provided at the rear end of the rotating shaft 31 .
- the stator 32 is a stator on which a field coil is wound, and is mounted in a fixed state in the motor accommodation space 13 .
- the rotor 33 is a rotor including a permanent magnet, and is coupled to the middle portion of the rotation shaft 31 .
- the journal bearing 34 is a journal foil air bearing that rotatably supports the rotation shaft 31 in order to reduce frictional force generated by high-speed rotation.
- the journal bearing 34 supports the radial load of the rotary shaft 31 , and is provided at the front end and the rear end of the rotary shaft 31 , respectively.
- a pair of thrust bearings 35 are mounted on the rear end of the rotating shaft 31 .
- the thrust bearing 35 is a thrust foil air bearing.
- the thrust bearing 35 is a bearing for supporting the axial load of the rotating shaft 31.
- the thrust bearing 35 is provided as a pair as shown in FIG. 1 and the thrust bearing runner (Part number not shown) is arranged on both sides, respectively.
- the air cooling unit 40 is a device for cooling the inner housing 12 and the motor 30 using a cooling gas, and includes a cooling path 41 and a cooling fan 42 .
- a cooling gas air or an inert gas is used.
- the cooling passage 41 is a passage for accommodating the cooling gas, and is formed so that the cooling gas flow G accommodated therein is continuously circulated.
- the cooling path 41 is provided to continuously circulate the entire space of the motor accommodation space 13 as shown in FIG. 2 .
- the cooling path 41 is preferably arranged rotationally or axially symmetrically about the first central axis C1.
- the cooling path 41 is spatially separated from the compressed gas flow path 26 . Accordingly, the compressed gas in the compressed gas passage 26 leaks from the compressed gas passage 26 during the compression process and cannot penetrate into the cooling passage 41 .
- the cooling fan 42 is a cooling fan for forced circulation flow of the cooling gas accommodated in the cooling passage 41 , and is mounted at the rear end of the motor accommodation space 13 .
- the cooling fan 42 is non-rotatably coupled to the rear end of the rotation shaft 31 , and thus rotates together by the rotational force of the rotation shaft 31 .
- the non-contact explosion-proof unit 50 is a device provided so that the flame g1 generated in the inner space of the inner housing 12 passes and is cooled and then discharged to the outside.
- the non-contact explosion-proof unit 50 is provided in the form of a gap or passage having a width (d) less than a predetermined value and a length (L) greater than or equal to a predetermined value, as shown in FIG. 4 .
- the non-contact explosion-proof unit 50 is provided to have an axially symmetrical or rotationally symmetrical shape so as not to interfere with the rotational movement of the rotational shaft 31 .
- the non-contact explosion-proof unit 50 includes a first surface 311 formed on an outer peripheral surface of one end of the rotation shaft 31 and a first surface 311 formed on the inner housing 12 as shown in FIGS. 4 and 7 .
- the two surfaces 123 are provided as a cone-shaped space formed in cooperation with each other.
- first surface 311 of the rotation shaft 31 and the second surface 123 of the inner housing 12 are spaced apart from each other by a predetermined distance d, even when the rotation shaft 31 rotates, the The first surface 311 and the second surface 123 remain in a “non-contact” state.
- the first surface 311 of the rotation shaft 31 is located at the front end of the rotation shaft 31 , and is a tapered curved surface whose radius gradually decreases toward the impeller 21 .
- the second surface 123 of the inner housing 12 is a tapered curved surface having a shape corresponding to the first surface 311 .
- the cone-shaped space portion of the non-contact explosion-proof unit 50 is positioned within a predetermined distance from the impeller 21 , and is disposed in a direction in which the radius becomes smaller toward the impeller 21 .
- One end of the non-contact explosion-proof unit 50 communicates with a bearing mounting part 122 on which a journal bearing 34 disposed at the front end of the motor accommodating space 13 among the journal bearings 34 is mounted,
- the other end of the non-contact explosion-proof unit 50 communicates with the downstream of the compressed gas flow path 26 .
- the downstream of the compressed gas flow path 26 is a position near immediately before the compressed gas flow F enters the impeller 21 .
- the non-contact explosion-proof unit 50 communicates the internal space of the inner housing 12 and the compressed gas flow path 26 with each other.
- the electrical conversion device 60 is a device for converting electricity to control the motor 30 , and converts a direct current (DC) component into an alternating current (AC) component or vice versa. It is a device that converts to and supplies it to the motor 30 .
- the electrical conversion device 60 includes an inverter that converts a direct current (DC) component into an alternating current (AC) component.
- the inverter is also called a power inverter, and obtains desired voltage and frequency output values through an appropriate conversion method, a switching element, or a control circuit.
- the electrical conversion device 60 includes a metal case 61 that can accommodate various heating components therein.
- the case 61 has a structure capable of airtightness so that the flame is not leaked to the outside, even when various heat generating components inside are burned and a flame is generated.
- the case 61 is disposed at the lower end of the outer housing 11 and contacts the outer peripheral surface of the outer housing 11 as shown in FIG. 1 to exchange heat with the housing 10 . maintains the status quo.
- the case 61 is disposed at a position capable of exchanging heat with the distal end of the cooling fin 121 through the outer housing 11 .
- a switching module 62 is disposed at an inner upper end of the case 61
- a controller 63 is disposed at an inner lower end of the case 61 .
- the switching module 62 includes an insulated/isolated gate bi-polar transistor (IGBT) as a main heat generating component of the electric conversion device 60 .
- IGBT insulated/isolated gate bi-polar transistor
- the controller 63 is a device that controls the overall operation of the motor 30 , such as adjusting the rotation speed of the motor 30 .
- the impeller 21 and the cooling fan 42 rotate, and the air F introduced through the compressed gas inlet 24 is transferred to the compression unit. It is compressed while flowing along the compressed gas flow path 26 of 20 and discharged to the outside through the compressed gas outlet 25 .
- the compressed gas passage 26 is spatially separated from the cooling passage 41 , the air flowing in the compressed gas passage 26 leaks during compression and penetrates into the cooling passage 41 . Can not. That is, the air flow F flowing along the compressed gas flow path 26 and the cooling gas flow G flowing along the cooling path 41 are not mixed with each other.
- the cooling gas (G) accommodated in the cooling passage (41) is forcibly circulated by the cooling fan (42), so that the field coil of the stator (32) and the rotating shaft ( 31 ), the rotor 33 , the journal bearing 34 , and the thrust bearing 35 .
- the cooling gas (G) flowing outside the motor accommodation space (13) is rapidly cooled by the compressed gas flow (F) flowing between the outer housing (11) and the inner housing (12).
- the cooling fins 121 the heat exchange efficiency between the cooling gas (G) flowing outside the motor accommodation space (13) and the compressed gas flow (F) is very high.
- an internal explosion may occur due to burnout of the motor stator 32 existing inside the inner housing 12 or a flame generated by friction between the bearings 34 and 35, etc.
- the resulting flame flow g1 is generated, and as shown in FIG. 4 , the flame flow g1 flows into one end of the non-contact explosion-proof unit 50 and then the non-contact explosion-proof unit 50 It passes through and is discharged to the other end of the non-contact explosion-proof unit 50 .
- the turbocompressor 100 having the above configuration is a turbocompressor capable of compressing and supplying gas to the outside, comprising: a compressed gas inlet 24 through which the gas is sucked; an impeller 21 for compressing the gas introduced through the compressed gas inlet 24; a compressed gas outlet 25 through which the gas compressed by the impeller 21 is discharged to the outside; a compression unit (20) having a compressed gas flow path (26) connected from the compressed gas inlet (24) to the compressed gas outlet (25); In order to rotate the impeller 21, one end of the motor 30 having a rotating shaft 31 coupled to the impeller 21; a housing 10 having a motor accommodating space 13 accommodating the motor 30; a cooling path 41 provided to pass through the motor accommodating space 13, and formed so that the cooling gas (G) accommodated therein is continuously circulated; As a bearing for supporting the radial load or the axial load of the rotating shaft 31, at least one air bearing (34, 35) is provided; A non-contact type explosion-proof unit having a width (d) less than a predetermined value
- the compressed gas flow path 26 is spatially separated from the cooling passage 41, so that the gas in the compressed gas flow passage 26 penetrates into the cooling passage 41. Therefore, the service life is increased and the vibration noise is reduced by the air bearings 34 and 35, and at the same time, the motor stator 32 present inside the inner housing 12 is damaged or the bearings 34 and 35 are damaged. Even if an internal explosion occurs due to the flame generated by the friction of This has the advantage of preventing accidents.
- the non-contact explosion-proof unit 50 communicates the internal space 13 of the housing 10 and the compressed gas flow path 26 with each other, the compressed gas flow path 26 There is an advantage in that the flame flow g1 passing through the non-contact explosion-proof unit 50 is accelerated by the negative pressure generated by the compressed gas flow F flowing through it.
- the non-contact explosion-proof unit 50 includes a first surface 311 formed on an outer peripheral surface of one end of the rotation shaft 31 and a second surface 123 formed on the housing 10 . It is a cone-shaped space part 50 formed in cooperation with each other, and the cone-shaped space part 50 is located within a predetermined distance with the impeller 21 , and the radius gradually decreases toward the impeller 21 . direction, considering that the front end of the rotating shaft 31 has a tapered shape, compared to the case of machining other parts of the inner housing 12, the non-contact explosion-proof unit 50 There is an advantage in that machining for forming can be minimized.
- turbocompressor 100 since the turbocompressor 100 includes a cooling fan 42 for forcibly flowing the cooling gas G accommodated in the cooling passage 41 , the cooling accommodated in the cooling passage 41 . There is an advantage of forcibly circulating the solvent gas (G).
- the cooling fan 42 is disposed at the rear end of the rotating shaft 31 , and rotates by the rotational force of the rotating shaft 31 , so that the cooling fan 42 is rotated.
- the advantage is that a separate motor is not required.
- a cooling fin 121 capable of increasing heat exchange efficiency is provided between the compressed gas passage 26 and the cooling passage 41 , so that the cooling gas G and the compression There is an advantage of increasing the heat exchange efficiency between the gases (F).
- the turbocompressor 100 includes an electrical converter 60 for controlling the motor 30 , and the electrical converter 60 is made of a metal material capable of airtightly accommodating the internal heating component. and a case 61 of It does not leak, and at the same time, there is an advantage that the heat generating part inside the case 61 can be cooled quickly.
- a cooling fin 121 capable of increasing heat exchange efficiency is provided between the compressed gas passage 26 and the cooling passage 41 , and the case 61 is provided for the cooling. Since it is disposed at a position capable of exchanging heat with the fins 121 , the electric conversion device 60 can be cooled more rapidly by the compressed gas flow F flowing between the cooling fins 121 . There is this.
- the non-contact explosion-proof unit 50 is formed "in a straight line" as shown in FIG. 4, but instead of such a shape, the flame flow g1 generated in the inner space of the housing 10 passes through In order to be able to substantially increase the distance, it can have a shape such as one of the non-contact non-contact explosion-proof unit 50a shown in FIG. 5, the non-contact non-contact explosion-proof unit 50b shown in FIG.
- the non-contact explosion-proof unit 50 in addition to the same shape as the non-contact explosion-proof units 50a and 50b, can substantially increase the distance through which the flame flow g1 passes, even if the rotation shaft 31 rotates
- the first surface 311 and the second surface 123 can always maintain a "non-contact" state, they may have any shape.
- the non-contact explosion-proof unit 50 is formed on the first surface 311 formed on the outer peripheral surface of one end of the rotation shaft 31 and the inner housing 12 as shown in FIGS. 4 and 7 .
- the second surface 123 is provided as a cone-shaped space formed in cooperation with each other, but instead the first surface 311 formed on the outer peripheral surface of one end of the rotation shaft 31 and the second surface formed on the housing 10 Of course, 123 may be a cylindrical space formed in cooperation with each other.
- the non-contact explosion-proof unit 50 communicates the internal space of the inner housing 12 and the compressed gas flow path 26 with each other, but the non-contact explosion-proof unit 50 is the inner housing 12 .
- the non-contact explosion-proof unit 50 is the inner housing 12 .
- the non-contact explosion-proof unit 50 communicates downstream of the compressed gas flow path 26 with the bearing mounting part 122 of the journal bearing 34 disposed at the front end of the motor accommodation space 13 .
- the non-contact explosion-proof unit 50 may communicate any point of the motor accommodating space 13 and any point of the compressed gas flow path 26 with each other.
- the non-contact explosion-proof unit 50 is formed as a cone-shaped space formed over the entire 360 degrees along the circumferential direction of the first central axis C1 as shown in FIG. 7 , but the It goes without saying that the space portions may be formed alternately or intermittently in such a manner that a portion of the space portion is formed and a portion of the space portion is not formed along the circumferential direction of the first central axis C1.
- the cooling fan 42 is directly coupled to the rear end of the rotating shaft 31, but it is needless to say that the cooling fan 42 may be driven by a separate electric motor.
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Abstract
Description
Claims (10)
- 기체를 압축하여 외부로 공급할 수 있는 터보 압축기로서,상기 기체가 흡입되는 압축 기체 흡입구; 상기 압축 기체 흡입구를 통하여 유입된 기체를 압축하는 임펠러; 상기 임펠러에 의하여 압축된 상기 기체가 외부로 배출되는 압축 기체 배출구; 상기 압축 기체 흡입구로부터 상기 압축 기체 배출구까지 연결되어 있는 압축 기체 유로를 구비하는 압축 유닛;상기 임펠러를 회전시키기 위하여, 일단부가 상기 임펠러와 결합되어 있는 회전축을 구비하는 모터;상기 모터를 수용하는 모터 수용 공간을 구비한 하우징;상기 모터 수용 공간을 지나가도록 마련되며, 내부에 수용된 냉각용 기체가 계속적 순환이 가능하도록 형성되어 있는 냉각 기로;상기 회전축의 반경 방향 하중 또는 축 방향 하중을 지지하는 베어링으로서, 적어도 한 개 이상이 마련되어 공기 베어링;상기 하우징의 내부 공간에서 발생한 화염이 통과하면서 냉각된 후 외부로 배출될 수 있도록 마련된 통로로서, 미리 정한 값 이하의 폭과 미리 정한 값 이상의 길이를 가지는 비접촉식 방폭 유닛;을 포함하며,상기 압축 기체 유로는 상기 냉각 기로와 공간적으로 분리됨으로써, 상기 압축 기체 유로의 내부에 있는 기체가 상기 냉각 기로로 침투할 수 없는 것을 특징으로 하는 터보 압축기
- 제 1항에 있어서,상기 비접촉식 방폭 유닛은,상기 하우징의 내부 공간과 상기 압축 기체 유로를 서로 연통시키고 있는 것을 특징으로 하는 터보 압축기
- 제 1항에 있어서,상기 비접촉식 방폭 유닛은,상기 회전축의 일단부 외주면에 형성된 제 1면과 상기 하우징에 형성된 제 2면이 서로 협력하여 형성하는 원통형 공간부인 것을 특징으로 하는 터보 압축기
- 제 1항에 있어서,상기 비접촉식 방폭 유닛은,상기 회전축의 일단부 외주면에 형성된 제 1면과 상기 하우징에 형성된 제 2면이 서로 협력하여 형성하는 고깔형 공간부이며,상기 고깔형 공간부는, 상기 임펠러와 미리 정한 거리 이내에 위치되며, 상기 임펠러를 향하여 갈수록 반경이 점점 작아지는 방향으로 배치되어 있는 것을 특징으로 하는 터보 압축기
- 제 1항에 있어서,상기 비접촉식 방폭 유닛은,상기 하우징의 내부 공간에서 발생한 화염이 통과하는 거리를 증가시킬 수 있도록, 계단 형태, 파동 형태를 포함하는 군에서 선택된 하나의 형상을 가지는 것을 특징으로 하는 터보 압축기
- 제 1항에 있어서,상기 냉각 기로의 내부에 수용된 냉각용 기체를 강제 유동시키기 위한 냉각팬을 포함하는 것을 특징으로 하는 터보 압축기
- 제 6항에 있어서,상기 냉각팬은, 상기 회전축의 후단부에 배치되며, 상기 회전축의 회전력에 의하여 회전하는 것을 특징으로 하는 터보 압축기
- 제 1항에 있어서,상기 압축 기체 유로와 상기 냉각 기로 사이에는, 열교환 효율을 증가시킬 수 있는 냉각핀이 마련되어 있는 것을 특징으로 하는 터보 압축기
- 제 1항에 있어서,상기 모터를 제어하기 위한 전기 변환 장치를 포함하며,상기 전기 변환 장치는 내부의 발열 부품을 기밀 가능하게 수용할 수 있는 금속 재질의 케이스를 포함하며,상기 케이스는 상기 하우징과 열교환할 수 있도록 접촉 상태를 유지하고 있는 것을 특징으로 하는 터보 압축기
- 제 9항에 있어서,상기 압축 기체 유로와 상기 냉각 기로 사이에는, 열교환 효율을 증가시킬 수 있는 냉각핀이 마련되어 있으며,상기 케이스는 상기 냉각핀과 열교환할 수 있는 위치에 배치되어 있는 것을 특징으로 하는 터보 압축기
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CN202280023281.5A CN117062986A (zh) | 2021-03-23 | 2022-01-21 | 具有防爆功能的涡轮压缩机 |
US18/279,861 US12000409B2 (en) | 2021-03-23 | 2022-01-21 | Turbo compressor with explosion-proof function |
JP2023554909A JP2024512378A (ja) | 2021-03-23 | 2022-01-21 | 防爆機能を備えるターボ圧縮機 |
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KR10-2021-0037627 | 2021-03-23 | ||
KR1020210037627A KR102512734B1 (ko) | 2021-03-23 | 2021-03-23 | 방폭 기능을 구비하는 터보 압축기 |
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US (1) | US12000409B2 (ko) |
JP (1) | JP2024512378A (ko) |
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CN116792328A (zh) * | 2023-07-26 | 2023-09-22 | 烟台东德实业有限公司 | 一种内置水冷及风冷的单级高速离心空压机 |
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KR101315910B1 (ko) * | 2011-09-19 | 2013-10-10 | 주식회사 뉴로스 | 터보블로워 또는 터보압축기의 모터냉각구조 |
KR101988936B1 (ko) * | 2018-10-30 | 2019-06-13 | 터보윈 주식회사 | 복합식 냉각구조를 갖는 연료전지용 터보 송풍기 |
US20190323509A1 (en) * | 2018-04-20 | 2019-10-24 | Belenos Clean Power Holding Ag | Fluid compressor |
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KR101493161B1 (ko) | 2013-07-12 | 2015-02-12 | 주식회사 동희산업 | 셀프 쿨링타입 공기압축기 |
-
2021
- 2021-03-23 KR KR1020210037627A patent/KR102512734B1/ko active IP Right Grant
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- 2022-01-21 CN CN202280023281.5A patent/CN117062986A/zh active Pending
- 2022-01-21 US US18/279,861 patent/US12000409B2/en active Active
- 2022-01-21 WO PCT/KR2022/001090 patent/WO2022203178A1/ko active Application Filing
- 2022-01-21 JP JP2023554909A patent/JP2024512378A/ja active Pending
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JPH07167098A (ja) * | 1993-11-02 | 1995-07-04 | Electrolux:Ab | ターボファンユニット用電動モータ空冷装置 |
KR100572849B1 (ko) * | 2004-10-18 | 2006-04-24 | 주식회사 뉴로스 | 간단한 구조로 효율적인 모터 냉각이 가능한 터보 블로워 |
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CN116792328A (zh) * | 2023-07-26 | 2023-09-22 | 烟台东德实业有限公司 | 一种内置水冷及风冷的单级高速离心空压机 |
CN116792328B (zh) * | 2023-07-26 | 2023-12-22 | 烟台东德实业有限公司 | 一种内置水冷及风冷的单级高速离心空压机 |
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US20240151245A1 (en) | 2024-05-09 |
CN117062986A (zh) | 2023-11-14 |
KR20220132388A (ko) | 2022-09-30 |
KR102512734B1 (ko) | 2023-03-22 |
US12000409B2 (en) | 2024-06-04 |
JP2024512378A (ja) | 2024-03-19 |
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