WO2023090232A1 - 真空ポンプ及び該真空ポンプに用いられる断熱部材 - Google Patents
真空ポンプ及び該真空ポンプに用いられる断熱部材 Download PDFInfo
- Publication number
- WO2023090232A1 WO2023090232A1 PCT/JP2022/041793 JP2022041793W WO2023090232A1 WO 2023090232 A1 WO2023090232 A1 WO 2023090232A1 JP 2022041793 W JP2022041793 W JP 2022041793W WO 2023090232 A1 WO2023090232 A1 WO 2023090232A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- heat insulating
- vacuum pump
- fixed
- cavity
- pump
- Prior art date
Links
- 238000009413 insulation Methods 0.000 title claims abstract description 9
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 230000002093 peripheral effect Effects 0.000 claims description 57
- 230000007246 mechanism Effects 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 abstract description 18
- 239000000470 constituent Substances 0.000 abstract description 3
- 239000012774 insulation material Substances 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 description 40
- 239000011810 insulating material Substances 0.000 description 38
- 239000007789 gas Substances 0.000 description 24
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 229910052751 metal Inorganic materials 0.000 description 12
- 239000002184 metal Substances 0.000 description 12
- 238000001514 detection method Methods 0.000 description 11
- 230000006870 function Effects 0.000 description 11
- 238000004804 winding Methods 0.000 description 11
- 239000007787 solid Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 9
- 230000005284 excitation Effects 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 229910052782 aluminium Inorganic materials 0.000 description 7
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 7
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000010935 stainless steel Substances 0.000 description 6
- 229910001220 stainless steel Inorganic materials 0.000 description 6
- 230000004048 modification Effects 0.000 description 5
- 238000012986 modification Methods 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 150000002739 metals Chemical class 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000008929 regeneration Effects 0.000 description 2
- 238000011069 regeneration method Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229910003910 SiCl4 Inorganic materials 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003990 capacitor Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000012447 hatching Effects 0.000 description 1
- 230000015654 memory Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- FDNAPBUWERUEDA-UHFFFAOYSA-N silicon tetrachloride Chemical compound Cl[Si](Cl)(Cl)Cl FDNAPBUWERUEDA-UHFFFAOYSA-N 0.000 description 1
- 239000012265 solid product Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 235000012431 wafers Nutrition 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
- F04D19/042—Turbomolecular vacuum 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
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular 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
- F04D19/00—Axial-flow pumps
- F04D19/02—Multi-stage pumps
- F04D19/04—Multi-stage pumps specially adapted to the production of a high vacuum, e.g. molecular pumps
- F04D19/044—Holweck-type 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
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/522—Casings; Connections of working fluid for axial 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
- F04D29/582—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
- 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
- F04D29/5853—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps heat insulation or conduction
-
- 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
- F05D2260/00—Function
- F05D2260/20—Heat transfer, e.g. cooling
- F05D2260/231—Preventing heat transfer
Definitions
- the present invention relates to a vacuum pump and a heat insulating member used in the vacuum pump, and more particularly to a vacuum pump that can be used in a pressure range from low vacuum to ultra-high vacuum and a heat insulating member used in the vacuum pump. be.
- a vacuum pump such as turbomolecular is used to evacuate the chamber.
- Such a vacuum pump is provided with a cylindrical casing, a cylindrical stator nested in the casing and provided with thread grooves, and a rotor supported in the stator so as to rotate at high speed. are known.
- a vacuum pump depending on the gas sucked from the intake port of the casing, it may undergo a phase change from gas to solid during the process of compression inside the pump (inside the casing) and solidify inside the pump. As a result, the solidified matter accumulates inside the pump, which may cause a problem that the gas flow path is clogged.
- An object of the present invention is to provide a vacuum pump having a heat insulating part which is arranged in a temperature control part and which has a hollow structure formed in a cavity along the axial direction or the radial direction.
- the heat insulating portion which is a part of the component, has a hollow structure, the geometrical moment of inertia of the heat insulating portion increases, thereby improving the rigidity. Therefore, even if the cross-sectional area of the heat insulating portion is the same, both the rigidity and the heat insulating effect are improved, and the temperatures of the components inside the vacuum pump can be easily controlled as intended. That is, it is possible to selectively heat or cool only necessary components such as downstream flow paths.
- the invention according to claim 2 provides the vacuum pump in the configuration according to claim 1, wherein the cavity is formed in a substantially triangular shape when viewed from the opening direction.
- the hole shape of the cavity is substantially triangular when viewed from the opening direction, the rigidity of the heat insulating portion increases and the heat insulating portion can be easily formed. As a result, the cost can be suppressed and the heat insulating effect can be improved.
- the invention according to claim 3 provides the vacuum pump in the configuration according to claim 1, wherein the cavity is formed in a substantially parallelogram shape when viewed from the opening direction.
- the rigidity in the radial direction can be selectively reduced, and even if the inner parts thermally expand, the substantially parallelogram shape can be obtained.
- the part can be deformed to relieve the load.
- the invention according to claim 4 provides the vacuum pump having the configuration according to any one of claims 1 to 3, wherein the cavity is at least partially closed.
- the rigidity is further improved compared to the case where the cavity is a through hole.
- the invention according to claim 5 is the configuration according to any one of claims 1 to 4, wherein a rotating body having a plurality of rotor blades arranged in a multistage manner in the axial direction, and a rotor between the plurality of rotor blades and a turbomolecular pump mechanism comprising: a plurality of fixed blades disposed in the temperature-controlled part is at least one fixed blade among the plurality of fixed blades; , a vacuum pump disposed on the support of the fixed wing;
- the turbo-molecular pump mechanism includes a rotating body having a plurality of rotor blades arranged axially in multiple stages, and a plurality of fixed blades arranged between the plurality of rotor blades.
- the heat insulating portion which has a hollow structure, is provided as a spacer in the supporting portion of the fixed blade, the geometrical moment of inertia in the turbomolecular pump mechanism increases.
- both the rigidity and heat insulating effect of the motor as a whole are improved, making it easier to control the temperatures of the components inside the vacuum pump as intended.
- the vacuum pump further comprises a formed Holweck-type pump mechanism, wherein the part to be temperature controlled is the fixed cylinder, and the heat insulating part is arranged on a support part of the fixed cylinder.
- the adiabatic portion having a hollow structure is provided in the vacuum pump provided with the Holweck pump mechanism in which the thread groove is formed on at least one of the inner peripheral surface of the rotating cylinder and the outer peripheral surface of the fixed cylinder, which face each other in the radial direction. is provided as a spacer on the supporting portion of the fixed cylinder, the geometrical moment of inertia in the Holweck pump mechanism increases. As a result, both the rigidity and the heat insulating effect of the entire pump are improved, and the temperature of the components inside the vacuum pump can be easily controlled as intended. As a result, it is possible to selectively heat or cool only the necessary parts, such as downstream flow paths.
- a rotating disk and a fixed disk that are axially opposed to each other in the structure according to any one of the first to sixth aspects, and the rotating disk is opposed to the rotating disk.
- a Sigburn-type pump mechanism is further provided in which a spiral groove having a spiral peak portion and a spiral valley portion is formed on at least one surface of the fixed disc, wherein the temperature-controlled component is the fixed disc, and the thermal insulation.
- the part provides a vacuum pump arranged on the support of said stationary disc.
- the rotating disc and the fixed disc are axially opposed to each other, and at least one surface of the fixed disc facing the rotating disc has a spiral peak portion and a spiral trough portion.
- a vacuum pump having a grooved Sigburn type pump mechanism since a heat insulating portion having a hollow structure is provided as a spacer on a support portion of a fixed disk, the geometrical moment of inertia in the Sigburn type pump mechanism increases. As a result, both the rigidity and the heat insulating effect of the entire pump are improved, and the temperature of the components inside the vacuum pump can be easily controlled as intended. As a result, it is possible to selectively heat or cool only the necessary parts, such as downstream flow paths.
- a heat insulating member used in a vacuum pump having at least one of a heating function and a cooling function.
- a heat insulating member used in a vacuum pump having at least one of a heating function and a cooling function.
- the heat insulating member exhibiting a hollow structure that is hollow along the axial direction or the radial direction in the vacuum pump by using the heat insulating member exhibiting a hollow structure that is hollow along the axial direction or the radial direction in the vacuum pump, the geometrical moment of inertia of the heat insulating portion is increased, and the rigidity is improved. .
- both the rigidity and the heat insulating effect of the entire pump are improved, and the temperature of the components inside the vacuum pump can be easily controlled as intended.
- the heat insulating portion which is a part of the component, has a hollow structure, the geometrical moment of inertia of the heat insulating portion increases, thereby improving the rigidity. Therefore, even if the cross-sectional area of the heat insulating portion is the same, both the rigidity and the heat insulating effect are improved, and the temperatures of the components inside the vacuum pump can be easily controlled as intended. As a result, it is possible to selectively heat or cool only the necessary components, such as downstream flow paths. As a result, when heating is required, it is possible to heat the portion (location) of the pump that is really required and prevent deposition of reaction products. Conversely, when cooling is required, the newly required portion of the pump can be cooled to prevent overheating of the pump.
- FIG. 1 is a vertical cross-sectional view of a turbo-molecular pump shown as a first example of a vacuum pump according to an embodiment of the present invention
- FIG. Fig. 2 is a diagram showing an example of an amplifier circuit in the turbo-molecular pump of the first embodiment
- 4 is a time chart showing an example of control when a current command value detected by an amplifier circuit in the turbo-molecular pump of the first embodiment is greater than the detected value
- 4 is a time chart showing an example of control when a current command value detected by an amplifier circuit in the turbo-molecular pump of the first embodiment is smaller than the detected value
- FIG. 4 is a partially enlarged view of a heat insulating material in the turbomolecular pump of the first embodiment;
- (a) is a plan view,
- (b) is a cross-sectional view taken along the line AA of (a), and
- (c) is (b). It is a cross-sectional view shown as a modification of.
- FIG. 6 is a plan view showing another modification of the heat insulating material shown in FIG. 5; It is a figure explaining the difference between the rigidity in the case of a plate structure with a solid heat insulating material and the rigidity in the case of a hollow plate structure, (a) is a figure explaining the rigidity of a solid plate structure, (b). 6 is a diagram for explaining the rigidity of the hollow plate structure shown in FIG.
- FIG. 6 is a vertical cross-sectional view of a turbo-molecular pump shown as a second example of the vacuum pump according to the embodiment of the present invention
- FIG. 4 is a partial enlarged view of a heat insulating material in the turbomolecular pump of the second embodiment of the same, where (a) is a plan view, (b) is a cross-sectional view taken along the line BB of (a), and (c) is (b). It is a cross-sectional view shown as a modification of.
- FIG. 6 is a vertical cross-sectional view of a turbo-molecular pump shown as a third example of the vacuum pump according to the embodiment of the present invention;
- a vacuum pump having at least one of a heating function and a cooling function for this purpose, which is arranged in a temperature-controlled part to be heated or cooled, and has a hollow structure formed into a cavity along the axial direction or the radial direction. It is realized by having a configuration that includes a heat insulating part that exhibits
- drawings may exaggerate by enlarging and exaggerating characteristic parts in order to make the features easier to understand, and the dimensional ratios, etc. of the constituent elements may not necessarily be the same as the actual ones.
- hatching of some components may be omitted in order to facilitate understanding of the cross-sectional structure of the components.
- FIG. 1 A longitudinal sectional view of this turbo-molecular pump 100 is shown in FIG.
- a turbo-molecular pump 100 has an intake port 101 formed at the upper end of a cylindrical outer cylinder 127 .
- a rotating body 103 having a plurality of rotating blades 102 (102a, 102b, 102c, . is provided inside the outer cylinder 127.
- a rotor shaft 113 is attached to the center of the rotor 103, and the rotor shaft 113 is levitated in the air and position-controlled by, for example, a 5-axis control magnetic bearing.
- the upper radial electromagnet 104 has four electromagnets arranged in pairs on the X-axis and the Y-axis.
- Four upper radial sensors 107 are provided near the upper radial electromagnets 104 and corresponding to the respective upper radial electromagnets 104 .
- the upper radial sensor 107 is, for example, an inductance sensor or an eddy current sensor having a conductive winding, and detects the position of the rotor shaft 113 based on the change in the inductance of this conductive winding, which changes according to the position of the rotor shaft 113 .
- the upper radial direction sensor 107 is configured to detect the radial displacement of the rotor shaft 113, that is, the rotor 103 fixed thereto, and send it to a control device (not shown).
- a compensation circuit having a PID adjustment function generates an excitation control command signal for the upper radial electromagnet 104 based on the position signal detected by the upper radial sensor 107, and the amplifier shown in FIG. A circuit 150 (described later) controls the excitation of the upper radial electromagnet 104 based on this excitation control command signal, thereby adjusting the upper radial position of the rotor shaft 113 .
- the rotor shaft 113 is made of a high magnetic permeability material (iron, stainless steel, etc.) or the like, and is attracted by the magnetic force of the upper radial electromagnet 104 . Such adjustments are made independently in the X-axis direction and the Y-axis direction.
- the lower radial electromagnet 105 and the lower radial sensor 108 are arranged in the same manner as the upper radial electromagnet 104 and the upper radial sensor 107 so that the lower radial position of the rotor shaft 113 is set to the upper radial position. adjusted in the same way.
- the axial electromagnets 106A and 106B are arranged so as to vertically sandwich a disk-shaped metal disk 111 provided below the rotor shaft 113 .
- the metal disk 111 is made of a high magnetic permeability material such as iron.
- An axial sensor 109 is provided to detect axial displacement of the rotor shaft 113 and is configured to send its axial position signal to the controller.
- a compensation circuit having, for example, a PID adjustment function generates excitation control command signals for the axial electromagnets 106A and 106B based on the axial position signal detected by the axial sensor 109.
- the amplifier circuit 150 controls the excitation of the axial electromagnet 106A and the axial electromagnet 106B based on these excitation control command signals, so that the axial electromagnet 106A attracts the metal disk 111 upward by magnetic force, The axial electromagnet 106B attracts the metal disk 111 downward, and the axial position of the rotor shaft 113 is adjusted.
- the control device appropriately adjusts the magnetic force exerted on the metal disk 111 by the axial electromagnets 106A and 106B, magnetically levitates the rotor shaft 113 in the axial direction, and holds the rotor shaft 113 in the space without contact.
- the amplifier circuit 150 that controls the excitation of the upper radial electromagnet 104, the lower radial electromagnet 105, and the axial electromagnets 106A and 106B will be described later.
- the motor 121 has a plurality of magnetic poles circumferentially arranged to surround the rotor shaft 113 .
- Each magnetic pole is controlled by a control device so as to rotationally drive the rotor shaft 113 via an electromagnetic force acting between the magnetic poles and the rotor shaft 113 .
- the motor 121 incorporates a rotation speed sensor (not shown) such as a Hall element, resolver, encoder, etc., and the rotation speed of the rotor shaft 113 is detected by the detection signal of this rotation speed sensor.
- phase sensor (not shown) is attached, for example, near the lower radial direction sensor 108 to detect the phase of rotation of the rotor shaft 113 .
- the control device detects the position of the magnetic pole using both the detection signals from the phase sensor and the rotational speed sensor.
- a plurality of fixed wings 123a, 123b, 123c... are arranged with a slight gap from the rotor blades 102 (102a, 102b, 102c).
- the rotor blades 102 (102a, 102b, 102c, . . . ) are inclined at a predetermined angle from a plane perpendicular to the axis of the rotor shaft 113 in order to move molecules of the exhaust gas downward by collision.
- the fixed blades 123 are also inclined at a predetermined angle from a plane perpendicular to the axis of the rotor shaft 113, and are arranged inwardly of the outer cylinder 127 in a staggered manner with the stages of the rotary blades 102. ing.
- the outer peripheral end of the fixed wing 123 is supported by being inserted between a plurality of stacked fixed wing spacers 125 (125a, 125b, 125c, . . . ).
- the fixed wing spacer 125 is a ring-shaped member, and is made of metal such as aluminum, iron, stainless steel, copper, or an alloy containing these metals as components.
- An outer cylinder 127 is fixed to the outer circumference of the stationary blade spacer 125 with a small gap therebetween.
- a base portion 129 is provided at the bottom of the outer cylinder 127 .
- An exhaust port 133 is formed in the base portion 129 and communicates with the outside. Exhaust gas that enters the intake port 101 from the chamber side and is transferred to the base portion 129 is sent to the exhaust port 133 .
- a threaded spacer 131 is arranged between the lower portion of the stationary blade spacer 125 and the base portion 129 depending on the application of the turbomolecular pump 100 .
- the threaded spacer 131 is a cylindrical member made of a metal such as aluminum, copper, stainless steel, iron, or an alloy containing these metals, and has a plurality of helical thread grooves 131a on its inner peripheral surface. It is stipulated.
- the spiral direction of the thread groove 131 a is the direction in which the molecules of the exhaust gas move toward the exhaust port 133 when they move in the rotation direction of the rotor 103 .
- a cylindrical portion 102d is suspended from the lowermost portion of the rotor 103 following the rotor blades 102 (102a, 102b, 102c, . . . ).
- the outer peripheral surface of the cylindrical portion 102d is cylindrical and protrudes toward the inner peripheral surface of the threaded spacer 131, and is adjacent to the inner peripheral surface of the threaded spacer 131 with a predetermined gap therebetween.
- the exhaust gas transferred to the screw groove 131a by the rotary blade 102 and the fixed blade 123 is sent to the base portion 129 while being guided by the screw groove 131a.
- the base portion 129 is a disk-shaped member that constitutes the base portion of the turbomolecular pump 100, and is generally made of metal such as iron, aluminum, or stainless steel.
- the base portion 129 physically holds the turbo-molecular pump 100 and also functions as a heat conduction path, so a metal such as iron, aluminum, or copper that has rigidity and high thermal conductivity is used. is desirable.
- the fixed blade spacers 125 are joined to each other at their outer peripheral portions, and transmit the heat received by the fixed blades 123 from the rotary blades 102 and the frictional heat generated when the exhaust gas contacts the fixed blades 123 to the outside.
- the threaded spacer 131 is arranged on the outer circumference of the cylindrical portion 102d of the rotating body 103, and the inner peripheral surface of the threaded spacer 131 is provided with the thread groove 131a.
- a thread groove is formed on the outer peripheral surface of the cylindrical portion 102d, and a spacer having a cylindrical inner peripheral surface is arranged around it.
- the gas sucked from the intake port 101 may move the upper radial electromagnet 104, the upper radial sensor 107, the motor 121, the lower radial electromagnet 105, the lower radial sensor 108, the shaft
- the electrical section is surrounded by a stator column 122 so as not to intrude into the electrical section composed of the directional electromagnets 106A and 106B, the axial direction sensor 109, etc., and the interior of the stator column 122 is maintained at a predetermined pressure with purge gas. It may drip.
- a pipe (not shown) is arranged in the base portion 129, and the purge gas is introduced through this pipe.
- the introduced purge gas is delivered to the exhaust port 133 through gaps between the protective bearing 120 and the rotor shaft 113 , between the rotor and stator of the motor 121 , and between the stator column 122 and the inner cylindrical portion of the rotor blade 102 .
- the turbo-molecular pump 100 requires model identification and control based on individually adjusted unique parameters (for example, various characteristics corresponding to the model).
- the turbomolecular pump 100 has an electronic circuit section 141 in its body.
- the electronic circuit section 141 includes a semiconductor memory such as an EEP-ROM, electronic components such as semiconductor elements for accessing the same, a board 143 for mounting them, and the like.
- the electronic circuit section 141 is accommodated, for example, below a rotational speed sensor (not shown) near the center of a base section 129 that constitutes the lower portion of the turbo-molecular pump 100 and is closed by an airtight bottom cover 145 .
- some of the process gases introduced into the chamber have the property of becoming solid when their pressure exceeds a predetermined value or their temperature falls below a predetermined value. be.
- the pressure of the exhaust gas is lowest at the inlet 101 and highest at the outlet 133 .
- the process gas is transported from the inlet 101 to the outlet 133, if its pressure becomes higher than a predetermined value or its temperature becomes lower than a predetermined value, the process gas becomes solid and turbo molecules are formed. It adheres and deposits inside the pump 100 .
- a heater (not shown) or an annular water cooling pipe 149 is wrapped around the outer circumference of the base portion 129 or the like, and a temperature sensor (eg, a thermistor) (not shown) is embedded in the base portion 129, for example.
- a temperature sensor eg, a thermistor
- TMS Temperature Control
- the amplifier circuit 150 that controls the excitation of the upper radial electromagnet 104, the lower radial electromagnet 105, and the axial electromagnets 106A and 106B will be described.
- a circuit diagram of this amplifier circuit 150 is shown in FIG.
- an electromagnet winding 151 constituting the upper radial electromagnet 104 and the like has one end connected to a positive electrode 171a of a power source 171 via a transistor 161, and the other end connected to a current detection circuit 181 and a transistor 162. is connected to the negative electrode 171b of the power source 171 via the .
- the transistors 161 and 162 are so-called power MOSFETs and have a structure in which a diode is connected between their source and drain.
- the transistor 161 has its diode cathode terminal 161 a connected to the positive electrode 171 a and anode terminal 161 b connected to one end of the electromagnet winding 151 .
- the transistor 162 has a diode cathode terminal 162a connected to the current detection circuit 181 and an anode terminal 162b connected to the negative electrode 171b.
- the diode 165 for current regeneration has a cathode terminal 165a connected to one end of the electromagnet winding 151 and an anode terminal 165b connected to the negative electrode 171b.
- the current regeneration diode 166 has its cathode terminal 166a connected to the positive electrode 171a and its anode terminal 166b connected to the other end of the electromagnet winding 151 via the current detection circuit 181. It has become so.
- the current detection circuit 181 is composed of, for example, a Hall sensor type current sensor or an electric resistance element.
- the amplifier circuit 150 configured as described above corresponds to one electromagnet. Therefore, if the magnetic bearing is controlled by five axes and there are a total of ten electromagnets 104, 105, 106A, and 106B, a similar amplifier circuit 150 is configured for each of the electromagnets, and ten amplifier circuits are provided for the power supply 171. 150 are connected in parallel.
- the amplifier control circuit 191 is composed of, for example, a digital signal processor section (hereinafter referred to as a DSP section) (not shown) of the control device. It has become.
- the amplifier control circuit 191 compares the current value detected by the current detection circuit 181 (a signal reflecting this current value is called a current detection signal 191c) and a predetermined current command value. Then, based on this comparison result, the magnitude of the pulse width (pulse width times Tp1, Tp2) to be generated within the control cycle Ts, which is one cycle of PWM control, is determined. As a result, the gate drive signals 191 a and 191 b having this pulse width are output from the amplifier control circuit 191 to the gate terminals of the transistors 161 and 162 .
- a high voltage of about 50 V is used as the power source 171 so that the current flowing through the electromagnet winding 151 can be rapidly increased (or decreased).
- a capacitor is usually connected between the positive electrode 171a and the negative electrode 171b of the power source 171 for stabilizing the power source 171 (not shown).
- electromagnet current iL the current flowing through the electromagnet winding 151
- electromagnet current iL the current flowing through the electromagnet winding 151
- flywheel current is held.
- the hysteresis loss in the amplifier circuit 150 can be reduced, and the power consumption of the entire circuit can be suppressed.
- high-frequency noise such as harmonics generated in the turbo-molecular pump 100 can be reduced.
- the electromagnet current iL flowing through the electromagnet winding 151 can be detected.
- the transistors 161 and 162 are turned off only once during the control cycle Ts (for example, 100 ⁇ s) for the time corresponding to the pulse width time Tp1 as shown in FIG. turn on both. Therefore, the electromagnet current iL during this period increases from the positive electrode 171a to the negative electrode 171b toward a current value iLmax (not shown) that can flow through the transistors 161,162.
- both the transistors 161 and 162 are turned off for the time corresponding to the pulse width time Tp2 only once in the control cycle Ts, as shown in FIG. . Therefore, the electromagnet current iL during this period decreases from the negative electrode 171b to the positive electrode 171a toward a current value iLmin (not shown) that can be regenerated via the diodes 165,166.
- either one of the transistors 161 and 162 is turned on after the pulse width times Tp1 and Tp2 have elapsed. Therefore, the flywheel current is held in the amplifier circuit 150 during this period.
- the pressure of the exhaust gas is lowest at the intake port 101 and highest at the exhaust port 133.
- the process gas is transported from the inlet 101 to the outlet 133, if its pressure becomes higher than a predetermined value or its temperature becomes lower than a predetermined value, the process gas becomes solid and turbo molecules are formed. It adheres and deposits inside the pump 100 .
- a heater (not shown) is wound around the outer periphery of the base portion 129 or the like to provide a heating function.
- At least one of the cooling functions is provided by winding an annular water-cooled pipe 149 (in this embodiment, the cooling function is provided), and a temperature sensor (eg, thermistor) not shown is embedded in the base portion 129, and this temperature sensor Heating of the heater and cooling control (TMS) by the water cooling pipe 149 are performed so as to keep the temperature of the base portion 129 at a constant high temperature (set temperature) based on the signal of .
- TMS heater and cooling control
- a turbomolecular pump mechanism comprising a rotating body 103 having a plurality of rotor blades 102 arranged in multiple stages in the axial direction, and a plurality of fixed blades 123 arranged between the plurality of rotor blades 102.
- the temperature on the 201 side and the temperature on the thread groove pump mechanism 202 side should not affect the temperature control of the base portion 129, and conversely, the temperature on the base portion 129 side should not be affected.
- a heat insulating material 203 is provided between the threaded spacer 131 and the base portion 129 as a heat insulating portion.
- the thread groove pump mechanism portion 202 of the turbo-molecular pump 100 has a thread groove 131a formed in the inner peripheral surface of the threaded spacer 131, which is a fixed cylinder, facing the outer peripheral surface of the cylindrical portion 102d, which is a rotating cylinder, in the radial direction.
- the thread groove 131a may be provided on the outer peripheral surface of the cylindrical portion 102d, which is a rotating cylinder.
- the heat insulating material 203 functions as a heat insulating portion for blocking heat transfer between the threaded spacer 131 and the base portion 129 .
- the heat insulator 203 is made of stainless steel and exhibits a lower thermal conductivity than the aluminum threaded spacer 131 and the base portion 129 . Any specific material for the heat insulating material 203 may be used as long as it exhibits a thermal conductivity lower than that of either the threaded spacer 131 or the base portion 129.
- screws made of aluminum are used. It preferably exhibits a thermal conductivity lower than that of the attached spacer 131 and the base portion 129 .
- the heat insulating material 203 is an annular member, and as shown in FIG. While facing the peripheral surface 203A, the upper end surface 203B of the heat insulating material 203 is brought into contact with the lower end surface 131C of the threaded spacer 131, and the lower end surface 203C is brought into contact with the upper surface 129A of the base portion 129. It is sandwiched between the lower end surface 131C of the attached spacer 131 and the upper surface 129A of the base portion 129. As shown in FIG.
- the heat insulating material 203 has a cavity 204A penetrating between an inner peripheral surface 203A and an outer peripheral surface 203D, that is, a thickness portion thereof from an upper end surface 203B to a lower end surface 203C. provided repeatedly.
- the cavity 204A is formed in a substantially triangular hole shape when viewed from the end surface 203B side (opening direction). 203D side) are arranged alternately and regularly.
- the cavity 204A of the heat insulating material 203 is formed as a cavity 204A penetrating from the upper end face 203B to the lower end face 203C.
- a closing portion 203H closing the cavity 204A is formed in the cavity 204 so as to close the opening portion of the cavity 204A on one end side (end face 203C side)
- the rigidity of the heat insulating material 203 can be further increased compared to a structure in which the cavity 204A is a through hole.
- the blocking part 203H may block the middle part or both ends of the cavity 204A. Alternatively, it may be provided in some of the cavities 204A among the plurality of cavities 204A.
- the heat insulating material 203 has a cavity 204B that penetrates between the inner peripheral surface 203A and the outer peripheral surface 203D, that is, the thickness portion from the upper end surface 203B to the lower end surface 203C. may be formed in a substantially parallelogram hole shape when viewed from the end face 203B side (opening direction).
- Cavities 204B shown in FIG. 6 are generally parallelogram-shaped cavities 204B that are regularly arranged with two opposing sides facing inward (inner peripheral surface 203A side) and outward (outer peripheral surface 203D side). is provided.
- the hole shape of the cavity 204B is formed into a substantially parallelogram hole shape when viewed from the opening direction (the direction of the end surface 203B), the rigidity of the heat insulating portion (the heat insulating material 203) is increased, and the heat insulating portion can be easily formed. . As a result, the cost can be suppressed and the heat insulating effect can be improved. Further, when the cavity 204B is formed in a substantially parallelogram shape, the rigidity in the radial direction is selectively lowered, and the internal temperature-controlled parts (for example, the threaded spacer 131, the base portion 129, etc.) thermally expand. Also, the approximately parallelogram portion can be deformed to relieve the load.
- the rigidity of the heat insulating material 203 can be further increased compared to a structure in which the cavity 204B is a through hole.
- FIG. 7 shows a case where a solid plate without cavities is used as the heat insulating material 203, and a case where a substantially triangular cavity 204A and a substantially parallelogram-shaped cavity 204B are used. (b) for a hollow plate with a triangular cavity 204A and (c) for a hollow plate with a substantially parallelogram-shaped cavity 204B.
- the thickness T of the plate is 4 mm (mm), the length L in the circumferential direction (width) is 2.8 mm, and (b) and (c) ), the thickness T of each hollow plate is 5 mm, and the length L in the circumferential direction (lateral width) is 2.8 mm.
- the thickness t of the beams 205 separating the cavities 204A in the hollow plates of (b) and (c) was 0.5 mm, and the aperture ratio was 66%.
- FIG. 8 shows a second embodiment of the turbomolecular pump 100 according to the vacuum pump of the present invention.
- the structure of the second embodiment is obtained by changing the structure of the heat insulating material 203, and the rest of the structure is the same as that of FIG.
- the turbo-molecular pump 100 shown in the second embodiment is also configured as a Holweck pump mechanism as in the case of the first embodiment.
- a screw groove 131a is provided on the inner peripheral surface of a threaded spacer 131, which is a fixed cylinder facing the outer peripheral surface of 102d.
- the turbo-molecular pump 100 here may also have a configuration in which the thread groove 131a is provided on the outer peripheral surface of the cylindrical portion 102d, which is a rotating cylinder.
- the temperature of the turbo-molecular pump mechanism 201 side and the temperature of the screw groove pump mechanism portion 202 side are used to control the temperature of the base portion 129 as in the case of the first embodiment.
- the screws are used.
- a heat insulating material 203 is provided as a heat insulating portion between the attached spacer 131 and the base portion 129 .
- FIG. 9 is a partially enlarged view of the heat insulating material 203 in the turbomolecular pump 100 of the second embodiment, (a) being a plan view thereof, and (b) being a cross-sectional view taken along line BB of (a). be.
- the heat insulator 203 shown in FIG. 9 is also made of stainless steel, for example, and exhibits a lower thermal conductivity than the threaded spacer 131 and the base portion 129 made of aluminum.
- the heat insulating material 203 is an annular member, and as shown in FIG.
- the upper end surface 203B of the heat insulating material 203 is brought into contact with the lower end surface 131C of the threaded spacer 131, and the lower end surface 203C is brought into contact with the upper surface 129A of the base portion 129. It is sandwiched between the lower end surface 131C of the attached spacer 131 and the upper surface 129A of the base portion 129. As shown in FIG.
- the heat insulating material 203 has a thickness between an inner peripheral surface 203A and an outer peripheral surface 203D, that is, a thickness of 3 layers of an inner peripheral layer 203E, an intermediate layer 203F, and an outer peripheral layer 203G in order from the inside. formed in layers.
- the inner layer 203E is provided with a plurality of cavities 204C connected in the circumferential direction in an annular shape
- the intermediate layer 203F is provided with a plurality of cavities 204D connected in the circumferential direction in an annular shape
- the outer peripheral layer 203G a plurality of cavities 204E are provided in a ring in a row in the circumferential direction.
- approximately triangular cavities 204C are formed with the apexes and bases alternately directed inward (toward the inner peripheral surface 203A) and outward (toward the outer peripheral surface 203D). , are regularly arranged along the circumferential direction, and in the intermediate layer 203F, similarly approximately triangular cavities 204C are arranged so that the vertexes and bases are arranged inside (on the inner peripheral surface 203A side) and outside (on the outer peripheral surface 203D side). ), and the bases of the substantially triangular cavities 204C of the inner layer 203E and the bases of the substantially triangular cavities 204D of the intermediate layer 203F are arranged regularly.
- cavities 204E that are substantially parallelogram-shaped when viewed from the opening direction are regularly arranged along the circumferential direction with one side of the cavity 204E adjacent to the base of the substantially triangular cavity 204D of the intermediate layer 203F. are provided in an array.
- Cavity 204C, cavity 204D, and cavity 204E each penetrate from upper end surface 203B of heat insulating material 203 to lower end surface 203C.
- the cavity 204E provided in the outer peripheral layer 203G is formed in a parallelogram shape slightly inclined in the circumferential direction, but similar to the cavity 204B provided in FIG. can be formed into Further, the height of the outer peripheral layer 203G from the lower end surface 203C is slightly smaller than half the height of the inner peripheral layer 203E and the intermediate layer 203F.
- the substantially triangular cavities 204C and 204D are provided in the inner peripheral layer 203E and the intermediate layer 203F, respectively, and the substantially parallelogram-shaped cavity 204E is provided in the outer peripheral layer 203G. It rises and becomes easier to form. Further, by forming the cavity 204E of the outer peripheral layer 203G into a substantially parallelogram shape, the rigidity in the radial direction is selectively reduced, and the internal parts to be temperature controlled (for example, the threaded spacer 131, the base portion 129, etc.) Even with thermal expansion, the substantially parallelogram portion deforms and the load can be alleviated.
- the cavity 204C and the cavity 204D provided in the inner layer 203E and the intermediate layer 203F of the heat insulating material 203, and the cavity 204E provided in the outer layer 203G respectively penetrate from the upper end face 203B to the lower end face 203C. A case where they are formed as cavities 204C, 204D, and 204E is shown.
- the heat insulating material 203 in the case of the turbomolecular pump 100 of the second embodiment also has at least some of the cavities 204C, 204D, 204E among the plurality of cavities 204C, 204D, 204E, 204E is provided with a closing portion 203H that closes one end side (end face 203C side) of the cavities 204C, 204D, and 204E, compared to a structure in which the cavities 204C, 204D, and 204E are through holes, the heat insulating material
- the stiffness of 203 can be further increased.
- the blocking portion may block the middle portion or both ends of the cavities 204C, 204D and 204E.
- FIG. 10 shows a modification of the third embodiment of the turbomolecular pump 100 shown in FIG.
- the structure of the thread groove pump mechanism 202 is configured as a Sigburn pump mechanism, and the rest of the structure is the same as that of the second embodiment. redundant description is omitted.
- the thread groove pump mechanism portion 202 of the turbo-molecular pump 100 shown in FIG. 10 has a rotating disk 202A and a fixed disk 202B facing each other in the axial direction.
- 202C has a structure in which a screw groove 202F as a spiral groove having a spiral peak portion 202D and a spiral valley portion 202E is formed.
- the fixed disc 202B is fixed to the outer cylinder 127 with both sides of the outer peripheral portion sandwiched between the fixed wing spacer 126A and the fixed wing spacer 126B.
- the rotary disc 202A is formed in a state of protruding in the shape of rotary blades substantially at right angles from the outer peripheral surface of the cylindrical portion 102d of the rotating body 103, and is formed in a state of being opposed to both upper and lower surfaces of the fixed disc 202B. .
- the heat insulating material 203 is configured such that the outer peripheral surface 126D of the lower end axial support portion 126C of the fixed blade spacer 126B as a support portion for the fixed disk 202B faces the inner peripheral surface 203A of the heat insulating material 203, and the heat insulating material 203 end face 203B is brought into contact with the lower end face 126E of the stationary blade spacer 126B, and the lower end face 203C is brought into contact with the upper face 129A of the base portion 129, so that the lower end face 126E of the fixed blade spacer 126B and the upper face of the base portion 129 are brought into contact. 129A.
- the turbo-molecular pump 100 of this modified example also has the heat insulating material 203 having the three-layer structure shown in FIGS.
- the temperature of the turbo-molecular pump mechanism 201 and the thread groove pump mechanism 202 are prevented from affecting the temperature control of the base portion 129 side, and conversely, the controlled temperature of the base portion 129 side is controlled. can be prevented from affecting the turbo molecular pump mechanism 201 side and the thread groove pump mechanism portion 202 .
- the heat insulating material 203 is provided with approximately triangular cavities 204C and 204D in the inner peripheral layer 203E and intermediate layer 203F, respectively, and by providing approximately parallelogram-shaped cavities 204E in the outer peripheral layer 203G.
- Rigidity is increased, and formation is facilitated. Further, by forming the cavity 204E of the outer layer 203G into a substantially parallelogram shape, the rigidity in the radial direction is selectively lowered, and even if the inner parts thermally expand, the substantially parallelogram portion does not deform. can relieve the load.
- the structure in which the cavity 204C, the cavity 204D, and the cavity 204E of the heat insulating portion (heat insulating material 203) are formed along the axial direction is disclosed in the above embodiment, the structure may be formed along the radial direction. is.
- turbomolecular pump 101 intake port 102: rotor blade 102d: cylindrical portion (rotating cylinder) 103: rotating body 104: upper radial electromagnet 105: lower radial electromagnet 106A: axial electromagnet 106B: axial electromagnet 107: upper radial sensor 108: lower radial sensor 109: axial sensor 111: metal disk 113 : Rotor shaft 120 : Protective bearing 121 : Motor 122 : Stator column 123 : Fixed blade 123a : Fixed blade 123b : Fixed blade 123c : Fixed blade 125 : Fixed blade spacer 126A : Fixed blade spacer 126B : Fixed blade spacer 126C : Bottom end shaft
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Non-Positive Displacement Air Blowers (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
Description
(1)座屈のリスクが増加する。
(2)固有振動数が低下し、共振が発生する。
(2)外部からの衝撃などで変形し、回転部と固定部が接触して故障の原因となる。(3)加工中に歪みが発生し易く、加工が難しいのでコストアップになる。
したがって、それらの問題点を考慮すると、断熱部は、肉厚で長い部品となり、スペース上の制約も出て来る。そのため、必要十分な断熱効果を得るのが容易ではなかった。
図9に示す断熱材203も、例えばステンレス製であり、アルミニウム製のネジ付スペーサ131及びベース部129より低い熱伝導率を示す。また、断熱材203は、環状部材であって、図8に示すように、固定円筒の支持部としてのネジ付スペーサ131の下端側軸方向支持部131Aの外周面131Bに、断熱材203の内周面203Aを対向させるともに、断熱材203の上側の端面203Bをネジ付スペーサ131の下端面131Cに当接させ、さらに下側の端面203Cをベース部129の上面129Aに当接させて、ネジ付スペーサ131の下端面131Cとベース部129の上面129Aとで挟まれて配設されている。
101 :吸気口
102 :回転翼
102d :円筒部(回転円筒)
103 :回転体
104 :上側径方向電磁石
105 :下側径方向電磁石
106A :軸方向電磁石
106B :軸方向電磁石
107 :上側径方向センサ
108 :下側径方向センサ
109 :軸方向センサ
111 :金属ディスク
113 :ロータ軸
120 :保護ベアリング
121 :モータ
122 :ステータコラム
123 :固定翼
123a :固定翼
123b :固定翼
123c :固定翼
125 :固定翼スペーサ
126A :固定翼スペーサ
126B :固定翼スペーサ
126C :下端側軸方向支持部
126D :外周面
126E :下端面
127 :外筒
129 :ベース部
129A :上面
131 :ネジ付スペーサ
131A :下端側軸方向支持部
131B :外周面
131C :下端面
131a :ネジ溝
133 :排気口
141 :電子回路部
143 :基板
145 :底蓋
149 :水冷管
150 :アンプ回路
151 :電磁石巻線
161 :トランジスタ
161a :カソード端子
161b :アノード端子
162 :トランジスタ
162a :カソード端子
162b :アノード端子
165 :ダイオード
165a :カソード端子
165b :アノード端子
166 :ダイオード
166a :カソード端子
166b :アノード端子
171 :電源
171a :正極
171b :負極
181 :電流検出回路
191 :アンプ制御回路
191a :ゲート駆動信号
191b :ゲート駆動信号
191c :電流検出信号
201 :ターボ分子ポンプ機構
202 :ネジ溝ポンプ機構部
202A :回転円板
202B :固定円板
202C :両面
202D :渦巻き状山部
202E :渦巻き状谷部
202F :ネジ溝
203 :断熱材(断熱部)
203A :内周面
203B :端面
203C :端面
203D :外周面
203E :内周層
203F :中間層
203G :外周層
203H :閉塞部
204A :空洞
204B :空洞
204C :空洞
204D :空洞
204E :空洞
205 :梁
I :断面二次モーメント
S :断面積
T :板の厚み
t :梁の厚み
Tp1 :パルス幅時間
Tp2 :パルス幅時間
Ts :制御サイクル
iL :電磁石電流
iLmax :電流値
iLmin :電流値
Claims (8)
- 加熱機能又は冷却機能の少なくとも一方を備えている真空ポンプであって、
加熱又は冷却される被温調部品に配設され、軸方向または半径方向に沿って空洞に形成された中空構造を呈する断熱部を備えている、
ことを特徴とする真空ポンプ。 - 前記空洞は、開口方向から視て略三角形状に形成されている、
ことを特徴とする請求項1に記載の真空ポンプ。 - 前記空洞は、開口方向から視て略平行四辺形状に形成されている、
ことを特徴とする請求項1に記載の真空ポンプ。 - 前記空洞は、少なくとも一部が塞がれている、
ことを特徴とする請求項1から3のいずれか1項に記載の真空ポンプ。 - 軸方向に多段状に配列された複数の回転翼を有する回転体と、前記複数の回転翼間に配設された複数の固定翼と、を備えているターボ分子ポンプ機構をさらに備え、
前記被温調部品は、前記複数の固定翼のうちの少なくとも1つの固定翼であり、
前記断熱部は、前記固定翼の支持部に配設された、
ことを特徴とする請求項1から4のいずれか1項に記載の真空ポンプ。 - 半径方向で互いに対向する回転円筒の外周面と固定円筒の内周面の少なくとも一面にネジ溝が形成されたホルベック型ポンプ機構をさらに備え、
前記被温調部品は、前記固定円筒であり、
前記断熱部は、前記固定円筒の支持部に配設された、
ことを特徴とする請求項1から5のいずれか1項に記載の真空ポンプ。 - 軸方向で互いに対向する回転円板と固定円板とを有し、前記回転円板と対向する前記固定円板の少なくとも一面に渦巻き状山部と渦巻き状谷部を有する渦巻き状溝が形成されたシグバーン型ポンプ機構をさらに備え、
前記被温調部品は、前記固定円板であり、
前記断熱部は、前記固定円板の支持部に配設された、
ことを特徴とする請求項1から6のいずれか1項に記載の真空ポンプ。 - 加熱機能又は冷却機能の少なくとも一方を備えている真空ポンプに用いられる断熱部材であって、
加熱又は冷却される被温調部品に配設され、軸方向または半径方向に沿って空洞に形成された中空構造を呈している、
ことを特徴とする断熱部材。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202280069150.0A CN118103602A (zh) | 2021-11-19 | 2022-11-09 | 真空泵及用于该真空泵的隔热部件 |
EP22895514.2A EP4435269A1 (en) | 2021-11-19 | 2022-11-09 | Vacuum pump and insulation member for use in vacuum pump |
US18/700,064 US20240337266A1 (en) | 2021-11-19 | 2022-11-09 | Vacuum pump and insulation member for use in vacuum pump |
KR1020247010900A KR20240110557A (ko) | 2021-11-19 | 2022-11-09 | 진공 펌프 및 그 진공 펌프에 이용되는 단열 부재 |
IL311908A IL311908A (en) | 2021-11-19 | 2022-11-09 | Vacuum pump and insulation part for use in a vacuum pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2021-188660 | 2021-11-19 | ||
JP2021188660A JP2023075636A (ja) | 2021-11-19 | 2021-11-19 | 真空ポンプ及び該真空ポンプに用いられる断熱部材 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023090232A1 true WO2023090232A1 (ja) | 2023-05-25 |
Family
ID=86396959
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2022/041793 WO2023090232A1 (ja) | 2021-11-19 | 2022-11-09 | 真空ポンプ及び該真空ポンプに用いられる断熱部材 |
Country Status (8)
Country | Link |
---|---|
US (1) | US20240337266A1 (ja) |
EP (1) | EP4435269A1 (ja) |
JP (1) | JP2023075636A (ja) |
KR (1) | KR20240110557A (ja) |
CN (1) | CN118103602A (ja) |
IL (1) | IL311908A (ja) |
TW (1) | TW202325987A (ja) |
WO (1) | WO2023090232A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01315693A (ja) * | 1988-06-15 | 1989-12-20 | Hitachi Ltd | 真空排気装置 |
JPH077922U (ja) * | 1993-07-13 | 1995-02-03 | 日本軽金属株式会社 | 異形ハニカムパネル |
JP2015151932A (ja) | 2014-02-14 | 2015-08-24 | エドワーズ株式会社 | 真空ポンプ、及びこの真空ポンプに用いられる断熱スペーサ |
JP2016176340A (ja) * | 2015-03-18 | 2016-10-06 | 株式会社島津製作所 | ターボ分子ポンプ |
-
2021
- 2021-11-19 JP JP2021188660A patent/JP2023075636A/ja active Pending
-
2022
- 2022-10-31 TW TW111141376A patent/TW202325987A/zh unknown
- 2022-11-09 WO PCT/JP2022/041793 patent/WO2023090232A1/ja active Application Filing
- 2022-11-09 IL IL311908A patent/IL311908A/en unknown
- 2022-11-09 CN CN202280069150.0A patent/CN118103602A/zh active Pending
- 2022-11-09 EP EP22895514.2A patent/EP4435269A1/en active Pending
- 2022-11-09 US US18/700,064 patent/US20240337266A1/en active Pending
- 2022-11-09 KR KR1020247010900A patent/KR20240110557A/ko unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01315693A (ja) * | 1988-06-15 | 1989-12-20 | Hitachi Ltd | 真空排気装置 |
JPH077922U (ja) * | 1993-07-13 | 1995-02-03 | 日本軽金属株式会社 | 異形ハニカムパネル |
JP2015151932A (ja) | 2014-02-14 | 2015-08-24 | エドワーズ株式会社 | 真空ポンプ、及びこの真空ポンプに用いられる断熱スペーサ |
JP2016176340A (ja) * | 2015-03-18 | 2016-10-06 | 株式会社島津製作所 | ターボ分子ポンプ |
Also Published As
Publication number | Publication date |
---|---|
JP2023075636A (ja) | 2023-05-31 |
TW202325987A (zh) | 2023-07-01 |
EP4435269A1 (en) | 2024-09-25 |
IL311908A (en) | 2024-06-01 |
US20240337266A1 (en) | 2024-10-10 |
KR20240110557A (ko) | 2024-07-15 |
CN118103602A (zh) | 2024-05-28 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US20240254980A1 (en) | Turbomolecular pump | |
WO2023090232A1 (ja) | 真空ポンプ及び該真空ポンプに用いられる断熱部材 | |
WO2022210118A1 (ja) | 真空ポンプ | |
WO2023282147A1 (ja) | 真空ポンプ | |
JP7546410B2 (ja) | 真空ポンプおよび真空ポンプ用回転翼 | |
WO2023106154A1 (ja) | 真空ポンプおよび良熱伝導性部品 | |
JP7566540B2 (ja) | 真空ポンプ | |
WO2023027084A1 (ja) | 真空ポンプおよび固定部品 | |
JP7463324B2 (ja) | 真空ポンプ及び真空ポンプの熱移動抑制部材 | |
JP7530939B2 (ja) | 真空ポンプおよび固定部品 | |
WO2022186075A1 (ja) | 真空ポンプ | |
WO2024203990A1 (ja) | 真空ポンプ、制御装置及び昇温時間制御方法 | |
WO2024157947A1 (ja) | 真空ポンプ | |
WO2024135679A1 (ja) | 真空ポンプ | |
WO2022163341A1 (ja) | 真空ポンプ及びスペーサ | |
WO2022264925A1 (ja) | 真空ポンプ | |
WO2022124240A1 (ja) | 真空ポンプ | |
US20230417250A1 (en) | Vacuum pump | |
JP2024055254A (ja) | 真空ポンプ | |
IL301243A (en) | Vacuum pump and rotating cylinder supplied with vacuum | |
JP2024124020A (ja) | 真空ポンプおよびラジアル磁気軸受装置 | |
JP2022183756A (ja) | 真空ポンプ、スペーサ及びケーシング | |
IL301277A (en) | A vacuum pump and a vacuum exhaust system that uses a vacuum pump |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22895514 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 311908 Country of ref document: IL |
|
WWE | Wipo information: entry into national phase |
Ref document number: 202280069150.0 Country of ref document: CN |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022895514 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2022895514 Country of ref document: EP Effective date: 20240619 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 11202402423X Country of ref document: SG |