WO2015015902A1 - 真空ポンプ - Google Patents
真空ポンプ Download PDFInfo
- Publication number
- WO2015015902A1 WO2015015902A1 PCT/JP2014/065154 JP2014065154W WO2015015902A1 WO 2015015902 A1 WO2015015902 A1 WO 2015015902A1 JP 2014065154 W JP2014065154 W JP 2014065154W WO 2015015902 A1 WO2015015902 A1 WO 2015015902A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- vacuum pump
- pump
- rotor
- flow path
- fixed
- Prior art date
Links
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
- 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
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D19/00—Axial-flow 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
- F04D19/042—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
- 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
- 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
- F04D19/046—Combinations of two or more different types of 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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/32—Rotors specially for elastic fluids for axial flow pumps
- F04D29/38—Blades
- F04D29/384—Blades characterised by form
-
- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/52—Casings; Connections of working fluid for axial pumps
- F04D29/54—Fluid-guiding means, e.g. diffusers
- F04D29/541—Specially adapted for elastic fluid pumps
- F04D29/542—Bladed diffusers
- F04D29/544—Blade shapes
-
- 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
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/64—Mounting; Assembling; Disassembling of axial pumps
- F04D29/644—Mounting; Assembling; Disassembling of axial pumps 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
- F05D2260/00—Function
- F05D2260/60—Fluid transfer
- F05D2260/607—Preventing clogging or obstruction of flow paths by dirt, dust, or foreign particles
Definitions
- the present invention relates to a vacuum pump including a rotor rotatably disposed on a pump base and a gas flow path for exhausting gas sucked by the rotation of the rotor.
- Patent Document 1 a complex molecular pump described in Patent Document 1 is known.
- the complex molecular pump disclosed in Patent Document 1 is configured so that gas is sucked from an intake port (1a) by rotation of a rotor (6, 3a), and the sucked gas is discharged from an exhaust port (1b) (the same document). 1 (see paragraph 0024). *
- the upstream gas channel is a plurality of the gas channels for exhausting the sucked gas as described above.
- the rotary blade (2a) and the fixed blade (2b) are formed, and the downstream gas flow path is formed as a thread groove-shaped flow path by the rotor (3a) and the stator (7a).
- the stator (7a) is used as a means for preventing product accumulation in the downstream gas flow path formed with the stator (7a) as a fixed part as described above.
- the stator (7a) is heated with heat insulation (supports 9a, 9b, 9c) and heat generated by the radiation from the rotor (3a) and heat generated by friction of the gas flowing in the downstream gas flow path. (See the description of paragraphs 0025 and 0026 of the document 1). *
- the heating of the stator (7a) by the above-described method uses heat generated by the radiation from the rotor (3a) and heat generated by friction of the gas flowing in the downstream gas flow path. It is inevitable that the amount of heating varies depending on the flow rate of the gas and the temperature of the stator (7a) fluctuates. In particular, when the flow rate of the gas is small, the temperature of the stator (7a) cannot be raised to a predetermined temperature, and product deposition in the downstream gas flow path cannot be effectively suppressed. There is a problem.
- the present invention has been made to solve the above-described problems, and its object is not to be affected by the flow rate of the exhaust gas, and the exhaust-side gas flow that requires a high temperature from the viewpoint of preventing product accumulation. It is possible to heat only the fixed parts of the passage intensively and stably, to prevent the accumulation of products in the exhaust side gas flow path, and to improve the pump exhaust performance. It is to provide a vacuum pump.
- the present invention provides a pump base, a rotor disposed on the pump base, a support and driving means for rotatably supporting and rotating the rotor around its axis,
- a vacuum pump having a gas flow path that guides gas sucked by rotation of the rotor to a discharge port, heat insulation that insulates fixed parts constituting the exhaust side gas flow path from other parts of the entire gas flow path And heating means for heating the fixed part insulated by the heat insulation means.
- the exhaust gas passage is a thread groove-shaped passage formed by an outer peripheral surface of the rotor and a thread groove pump stator facing the rotor, and the fixing component is the screw It may be a groove pump stator.
- the exhaust-side gas flow path includes a rotor blade disposed on the outer peripheral surface of the rotor, and gas molecules imparted with momentum toward the downstream side of the gas flow path by the rotor blade.
- the heating means may have a structure in which the fixing part is provided with an attachment portion, and the heater is embedded in the attachment portion so that the heater heats the fixation component.
- the attachment portion of the fixed component may be arranged on the atmosphere side by providing a sealing means.
- the heat insulating means may have a structure that insulates the fixed component by a heat insulating space and a heat insulating spacer.
- the pump base is divided into at least an upper base portion and a lower base portion, and the upper base portion and the lower base portion are joined together by fastening means.
- the base portion may have a heat conductive structure.
- the heat insulating space may be a gap between the pump base and the fixed component.
- the heat insulating spacer is interposed between the fixed component and the pump base located below the fixed component, and supports the fixed component by fastening the fixed component and the pump base. It may be characterized by. *
- cooling means may be provided on both or either of the upper base portion and the lower base portion.
- the heat insulating means for insulating the fixed parts constituting the exhaust side gas flow path from the other parts of the entire gas flow path, And heating means for directly heating the fixed component thermally insulated by heat conduction, the following effects (1) and (2) are achieved.
- the heating means heats the fixed part, such heating is not affected by the flow rate of the exhausted gas.
- the fixed parts to be heated by the heating means are insulated by the heat insulating means, only the fixed parts of the exhaust side gas flow path that require high temperature from the viewpoint of preventing product accumulation are intensively and efficiently stabilized. It is possible to prevent the product from accumulating in the exhaust gas passage by heating and heating.
- FIG. Explanatory drawing of the temperature control example in the vacuum pump P1 of FIG.
- FIG. Explanatory drawing of the temperature control example in the vacuum pump P1 of FIG.
- FIG. 1 is a sectional view of a pump showing a part of a vacuum pump according to a first embodiment of the present invention.
- This vacuum pump P1 is, for example, a semiconductor manufacturing apparatus or a flat panel. Used as a gas exhaust means for a process chamber or other sealed chamber in a display manufacturing apparatus or a solar panel manufacturing apparatus. *
- the outer case 1 has a cylindrical shape with a bottom by integrally connecting a cylindrical pump case C and a pump base B with fastening means D1 in the cylinder axis direction. . *
- the upper end side of the pump case C (upper side in the drawing in FIG. 1) is opened as a gas intake port (not shown), and the gas exhaust port 2 is provided in the pump base B.
- the gas inlet port is connected to a sealed chamber (not shown), which is a high vacuum, such as a process chamber of a semiconductor manufacturing apparatus, and the gas exhaust port 2 is connected to an auxiliary pump (not shown).
- a cylindrical stator column 3 is provided at the center of the pump case C.
- the stator column 3 is erected on the pump base B.
- a rotor 4 is provided outside the stator column 3, and a magnetic bearing as a means for supporting the rotor 4 is provided inside the stator column 3,
- Various electric components such as a drive motor as means for rotating the rotor 4 are incorporated. Since magnetic bearings and drive motors are publicly known, detailed description thereof is omitted. *
- a fixed blade positioning portion 5 is provided at an upper end portion of the pump base B (specifically, an upper end portion of an upper base B1 to be described later). By mounting the fixed blade 7A, the fixed blade 7A has a function of positioning in the pump axial direction. *
- the rotor 4 is rotatably disposed on the pump base B, and is included in the pump base B and the pump case C.
- the rotor 4 has a cylindrical shape surrounding the outer periphery of the stator column 3, and has two cylindrical bodies (first cylindrical body 4B and second cylindrical body 4C) having different diameters at the connecting portion 4A of the annular plate body. Are connected in the cylinder axis direction, and the upper end surface side (above the paper surface in FIG. 1) of the first cylinder 4B is closed with an end member (not shown). *
- a rotation shaft (not shown) is attached to the inside of the rotor 4, and the rotation shaft is supported by a magnetic bearing built in the stator column 3, and the rotation shaft is built in the stator column 3.
- the rotor 4 By being driven to rotate by a motor, the rotor 4 is supported so as to be rotatable around its axis (the rotation axis) and is driven to rotate around the axis.
- the rotating shaft, the magnetic bearing and the drive motor built in the stator column 3 function as a support and drive means for the rotor 4.
- the rotor 4 may be supported so as to be rotatable about its axis and driven to rotate by another configuration. *
- a gas flow path R is provided on the outer peripheral surface side of the rotor 4, and the gas flow path R guides the gas sucked by the rotation of the rotor 4 to the discharge port 2. The gas is sucked from the gas inlet (not shown). *
- the first-side intake-side gas flow path R1 (upstream from the connecting portion 4A of the rotor 4) of the entire gas flow path R is a rotor. 4, a stationary blade 7 that guides gas molecules, which are given momentum toward the downstream side of the gas flow path R by the rotary blade 6, to the downstream side of the gas flow path R;
- the latter exhaust-side gas flow path R2 (on the downstream side of the connecting portion 4A of the rotor 4) has a thread groove shape formed by the outer peripheral surface of the rotor 4 and the thread groove pump stator 8 facing the outer peripheral surface. It is formed as a gas flow path.
- the rotor blade 6 constituting the intake side gas flow path R1 is centered on a pump axis such as the rotation center of the rotor 4 or the like. A plurality are arranged side by side in a radial pattern.
- the fixed vanes 7 constituting the intake side gas flow path R1 are arranged and fixed on the inner peripheral side of the pump case C in a form that is positioned in the pump radial direction and the pump axial direction via the fixed vane positioning spacers 9. A plurality of them are arranged in a radial pattern around the pump shaft center. *
- the rotary blades 6 and the fixed blades 7 that are radially arranged as described above are alternately arranged in multiple stages along the pump axis, whereby the intake-side gas flow path R1.
- the structure in which is formed is adopted.
- the rotor 4 and the plurality of rotor blades 6 integrally rotate at a high speed when the drive motor is started, so that the rotor blades 6 are directed downward to the gas molecules incident from the gas intake port.
- Giving momentum of The gas molecules having the downward momentum are sent to the next rotor blade side by the fixed blade 7.
- the gas molecules on the gas intake side pass through the intake side gas flow path R1 in the direction of the exhaust side gas flow path R2. It exhausts so that it may shift sequentially.
- the thread groove pump stator 8 constituting the exhaust side gas flow path R2 is the downstream outer peripheral surface of the rotor 4.
- the outer peripheral surface of the second cylindrical body 4C is spaced from the downstream outer peripheral surface of the rotor 4 with a predetermined gap therebetween. It arrange
- a thread groove 8A is formed in the inner peripheral portion of the thread groove pump stator 8, and the thread groove 8A changes into a tapered cone shape whose diameter is reduced downward, and the thread groove pump stator. 8 is engraved spirally from the upper end to the lower end.
- the exhaust-side gas flow path R2 is formed as a screw groove-shaped gas flow path because the downstream outer peripheral surface of the rotor 4 and the screw groove pump stator provided with the screw groove 8A face each other.
- the structure to be formed is adopted.
- the exhaust side gas flow path R2 as described above is formed. It is also possible to adopt.
- the heating means 11 is provided with a mounting portion 12 on the outer peripheral surface of the thread groove pump stator 8.
- the heater 13 directly heats the thread groove pump stator 8 by heat conduction, and the heat insulating means 10 is arranged around the mounting portion 12 with the pump base B and the thread groove pump stator 8.
- a heat insulating space 14 including a gap between the (fixed parts) is set, and the entire thread groove pump stator 8 including the mounting portion 12 is supported by a heat insulating spacer 15.
- a temperature sensor S1 for heater control is also embedded in the mounting portion 12, and the temperature control of the heater 13 is performed based on a detection signal from the temperature sensor S1.
- the pump base B is divided into at least an upper base portion B1 and a lower base portion B2, and the upper base portion B1 and the lower base portion B2 are joined by the fastening means D2,
- the lower base portion B2 has a heat conductive structure.
- ⁇ Configuration 2 Due to the joining of ⁇ Configuration 1>, a recess 16 facing the downstream outer peripheral surface of the rotor 4 is formed on the inner surface of the pump base B, and the thread groove pump stator 8 is inserted into the recess 16 via a predetermined gap.
- the mounting portion 12 is assembled, and the predetermined gap is used as the heat insulating space 14.
- the pump base B and the thread groove pump stator 8 are brought into contact with each other at the edge of the concave portion 16. In this case, there is almost no heat conduction through the contact portion.
- ⁇ Configuration 3 The heat insulating spacer 15 is interposed between the thread groove pump stator 8 and the pump base B (specifically, the lower base B2) positioned below the thread groove pump stator 8, and the thread groove pump stator 8 and the pump.
- ⁇ Configuration 4 The electric wire of the heater 13 is pulled out from the mounting portion 12 of the thread groove pump stator 8, and is insulated from the heater 13 and the electric wire by exposing the mounting portion 12 to high vacuum. There is a risk of destruction. Therefore, in the vacuum pump P1 of FIG. 1, the mounting portion 12 is disposed on the atmosphere side by providing sealing means 17 such as an O-ring on the outer peripheral surface of the mounting portion 12. *
- FIG. 2 is an explanatory diagram relating to how heat generated in the vacuum pump according to the first embodiment of the present invention is transmitted and where the cooling pipe is installed. *
- Q1 is heat transmitted from the fixed blade 7 to the upper base portion B1 by heat conduction
- Q2 is heat by the radiation from the rotor 4 to the thread groove pump stator 8, and how it is transmitted
- Q3 is from the stator column 3
- a cooling pipe 18 can be provided as a cooling means in both the upper base part B1 and the lower base part B2, and either one of the cooling pipes 18 can be provided. Only may be adopted.
- the cooling pipe 18 of the upper base portion B1 like the heat of Q2 and Q4, heat transmitted from the thread groove pump stator 8 to the upper base portion B1 and the lower base portion B2 via the heat insulating spacer 15 or the sealing means 17, and , And functions as a means for mainly cooling the heat transmitted from the fixed blade 7 to the upper base portion B1 by heat conduction like the heat of Q1.
- the cooling pipe 18 of the lower base portion B2 mainly functions as a means for cooling the heat Q3 transmitted from the stator column 3 to the lower base portion B2 by heat conduction.
- each cooling pipe 18 is provided with an operation valve. By adjusting each operation valve, the cooling medium flowing in each cooling pipe 18 is adjusted. The flow rate can be adjusted individually.
- a temperature sensor used for controlling an operation valve (not shown) of the cooling pipe 18 (hereinafter referred to as “temperature sensor S2 for water cooling pipe valve control”) is provided in the vicinity of the cooling pipe 18 installed in the upper base portion B1, or A configuration provided in the vicinity of the cooling pipe 18 installed in the lower base portion B2 or a configuration provided in the vicinity of both the cooling pipes 18 can be employed.
- the screw groove pump stator 8 as a fixed part constituting the exhaust side gas flow path R2 in the entire gas flow path R is insulated from the other parts by the heat insulating means 10.
- the screw groove pump stator 8 thus insulated is employed, so that the following ⁇ 1-1 effect> and ⁇ 2-1 effect >> is obtained.
- the heating means 11 directly heats the thread groove pump stator 8 by heat conduction, so that the heating affects the flow rate of the exhausted gas. I will not receive it. Further, since the thread groove pump stator 8 to be heated is thermally insulated by the heat insulating means 10, only the thread groove pump stator 8 that requires high temperature from the viewpoint of preventing product accumulation is intensively and efficiently heated. Further, it is possible to prevent the product from being deposited in the exhaust side gas flow path R2 by the heating. *
- the thread groove pump stator 8 heated by the heating means 11 is thermally insulated by the heat insulation means 10 as described above. Parts other than the stator 8 are not heated by the heating means 11. Therefore, it is possible to effectively prevent the temperature of a component to be prevented from being increased in temperature by heating in the heating means 11 and the strength decrease due to the heating, for example, a component such as the rotor blade 6 or the fixed blade 7 and the strength decrease in the component. Therefore, it is possible to improve the pump exhaust performance.
- FIGS. 3 to 5 are explanatory diagrams of temperature control examples in the vacuum pump P1 of FIG. *
- the temperature control of the heater 13 and the temperature control of the water cooling pipe 18 are independent controls, and the temperature control of the heater 13 is the temperature for heater control installed in the thread groove pump stator 8.
- the temperature of the heater 13 is controlled based on the detection signal from the sensor S1, and the temperature control of the water cooling pipe 18 is performed by operating the operation valve of the water cooling pipe 18 based on the detection signal from the temperature sensor S2 for controlling the water cooling pipe valve. It was supposed to be controlled. In this respect, all temperature control examples are common. *
- FIG. 5 is different from the temperature control example of FIG. 3 in the location where the water cooling pipe 18 is installed.
- the water cooling pipe 18 is installed in both the upper base portion 1A and the lower base portion 1B.
- the water cooling pipe 18 is installed only in the upper base part B1
- the water cooling pipe 18 is installed only in the lower base part B2.
- FIG. 6 is an explanatory diagram of the experimental results according to the temperature control example of FIG. 3
- FIG. 7 is an explanatory diagram of the experimental results of the temperature control example of FIG. 4, and FIG. It is. *
- the “heater control temperature” is the temperature of the heater 13 controlled based on the detection signal from the heater control temperature sensor S1
- the “water cooling pipe control temperature” is the water cooling pipe valve. It is the temperature of the water cooling pipe 18 controlled based on the detection signal from the temperature sensor S2 for control. These temperatures are set so that the difference is 30 ° C. to 40 ° C. *
- the heater control temperature is 30% higher than the water cooling pipe control temperature as shown in the experimental results of FIG. It could be stably maintained at a high temperature of 40 ° C to 40 ° C.
- the temperatures of the lower base portion B1, the gas exhaust port 2, and the stator column 3 were stably maintained at a low temperature of 10 ° C. or less from the water cooling pipe control temperature.
- the stable maintenance described above is that the thread groove pump stator 8 in which the heater 13 is installed is thermally insulated by the heat insulating means 10 including the heat insulating space 14 and the heat insulating spacer 15, and the water-cooled pipe installed in the upper base portion B1.
- the temperature increase due to the heat of Q1, Q2 and Q4 shown in FIG. 2 is mainly suppressed by the cooling action of 18, and at the same time, the cooling action of the water cooling pipe 18 installed in the lower base portion B2 is shown in FIG. It is thought that this is mainly because the temperature rise due to the heat of Q3 is suppressed.
- the flow rate of the gas flowing through the gas flow path R (pump load) is as shown in the experimental result of FIG.
- the heater control temperature could be stably maintained with a temperature difference of 30 ° C. to 40 ° C. from the water cooling tube valve control temperature.
- a phenomenon has occurred in which the temperatures of the stator column 3, the gas exhaust port 2, and the upper base portion B1 all exceed the water-cooled tube control temperature. This is because, as shown in FIG. 5, it is difficult to suppress the temperature rise due to the heat of Q1, Q2 and Q4 shown in FIG. 2 only with the water cooling pipe 18 installed in the lower base portion B2. Conceivable.
- FIG. 9 is pump sectional drawing which showed a part of vacuum pump which is the 2nd Embodiment of this invention.
- the vacuum pump P2 in FIG. 9 differs from the vacuum pump P1 in FIG. 1 in the specific configuration of the gas flow path R, and the other configurations are the same as the vacuum pump P1 in FIG. Are denoted by the same reference numerals, and detailed description thereof is omitted. *
- the exhaust side gas flow path R2 in the vacuum pump P2 of FIG. 9 is provided with the rotor blade 6 integrally provided on the outer peripheral surface of the rotor 4 and the momentum toward the downstream side of the gas flow path R by the rotor blade 6.
- This is a flow path formed by the fixed blade 7 that guides gas molecules to the downstream side of the gas flow path R.
- the vacuum pump P2 in FIG. 9 includes a plurality of fixed blades 7 as fixed parts constituting the exhaust-side gas flow channel R2 of the entire gas flow channel R.
- the lowermost fixed wing 7A is insulated from the other parts by the heat insulating means 10, and the insulated lowermost fixed wing 7A is directly heated by the heating means 11 by heat conduction.
- the heating means 11 in the vacuum pump P2 of FIG. 9 has a specific configuration in which a mounting portion 12 is integrally formed on the base (outer peripheral portion) side of the lowermost fixed blade 7A, and a heater is formed on the mounting portion 12.
- a structure is adopted in which the heater 12 directly heats the lowermost fixed blade 7 ⁇ / b> A by heat conduction.
- the heat insulating means 10 in the vacuum pump P2 in FIG. 9 has a specific configuration in which a heat insulating space 14 is set around the mounting portion 12 of the fixed wing 7A and the lowermost stage including the mounting portion 12 is provided.
- a configuration in which the entire fixed blade 7A is supported by the heat insulating spacer 15 and a structure in which the lowermost fixed blade 7A and the mounting portion 12 are positioned in the pump axial direction by the heat insulating spacer 15 are employed.
- the pump base B is divided into an upper base portion B1 and a lower base portion B2, and a recess 16 facing the downstream outer peripheral surface of the rotor 4 is formed on the inner surface of the pump base B.
- a part that is assembled to such a recess 16 via a predetermined gap is the mounting portion 12 of the lowermost fixed wing 7A, and this predetermined gap is used as the heat insulating space 14 described above.
- the lowermost fixed blade 7A as a fixed part constituting the exhaust side gas flow path R2 of the entire gas flow path R is insulated from the other parts. 10 and the structure in which the lowermost fixed blade 7A thus insulated is directly heated by heat conduction by the heating means 11 is employed, so that the following ⁇ 1-2 effects> and ⁇ 2- The second effect is obtained.
- the lowermost fixed blade 7A which is a fixed component, is thermally insulated by the heat insulating means 10, and the lowermost fixed blade 7A is directly heated by the heat conducting means 11 by heat conduction.
- the fixed blades higher than the lowermost fixed blade 7A are also insulated by the heat insulating means 10 including the heat insulating space 14 and the heat insulating spacer 15, and a plurality of such heat insulated It is also possible to employ a configuration in which the fixed blade is directly heated by heat conduction by the heating means 11 comprising the heater 13. *
- FIG. 10 is sectional drawing which showed a part of vacuum pump which is the 3rd Embodiment of this invention, for example, the fundamental structure of the vacuum pump of the figure, for example, a gas flow path Since the specific configuration and the like of R are the same as those of the vacuum pump of FIG. 9, the same reference numerals are given to the same members, and detailed descriptions thereof are omitted. *
- ⁇ Configuration A The fixed blade positioning portion 5 at the upper end of the pump base B is extended from the lowermost rotary blade 7A to the lower portion of the third fixed blade 7C, and the three-stage on the fixed blade positioning portion 5 A configuration in which the fixed blade 7C of the eye is placed and a heat insulating spacer 15 is interposed between the fixed blade positioning portion 5 and the second fixed blade 7B counted from the lowermost rotary blade 7A.
- ⁇ Configuration B The mounting part 12 is fastened from the lower side to the upper base part B1 on the upper side by the fastening means D4, and is thereby stacked between the mounting part 12 and the fixed blade positioning part 5 at the upper end of the pump base B. All the parts intervening, that is, the lowermost fixed wing 7A mounted on the attachment portion 12, the second fixed wing 7B counted from the lowermost fixed wing 7A, and these fixed wings 7A and 7B.
- the fixed blade positioning spacer 9 and the heat insulating spacer 15 interposed therebetween are integrated, and the second stage counted from the lowermost fixed blade 7A, the fixed blade positioning spacer 9 and the lowermost fixed blade 7A.
- a configuration in which the fixed wing 7B is thermally connected by heat conduction. *
- a plurality of fixed blades 7A and 7B as fixed parts constituting the exhaust side gas flow path R2 in the entire gas flow path R are insulated from the other parts by the heat insulating means 10.
- the same function and effect as the vacuum pump P2 of FIG. ⁇ Refer to "1-2 Operation and Effect" and ⁇ 2-2 Operation and Effect >>.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Geometry (AREA)
- Non-Positive Displacement Air Blowers (AREA)
Abstract
Description
上の構成からなる吸気側ガス流路R1では、駆動モータの起動によりロータ4および複数の回転翼6が一体に高速回転することにより、回転翼6がガス吸気口から入射したガス分子に下向き方向の運動量を付与する。この下向き方向の運動量を有するガス分子が固定翼7によって次段の回転翼側へ送り込まれる。以上のようなガス分子への運動量の付与と送り込み動作とが繰り返し多段に行われることで、ガス吸気口側のガス分子は、吸気側ガス流路R1を通じて、排気側ガス流路R2の方向に順次移行するように排気される。
度差をもって安定に維持することができた。しかし、ステータコラム3、ガス排気口2、上ベース部B1の温度がいずれも水冷管制御温度を超えてしまう現象が生じた。これは、図5のように下ベース部B2に設置した水冷管18だけでは図2に示した主にQ1、Q2、Q4の熱の影響による温度上昇の抑制が困難であったことが要因と考えられる。
Claims (10)
- ポンプベースと、 前記ポンプベース上に配置されたロータと、 前記ロータをその軸心周りに回転可能に支持し回転駆動する支持及び駆動手段と、 前記ロータの回転により吸気したガスを排出口に導くガス流路と、 を具備した真空ポンプにおいて、 前記ガス流路全体のうち排気側ガス流路を構成する固定部品をそれ以外の部品から断熱する断熱手段と、 前記断熱手段により断熱された前記固定部品を加熱する加熱手段と、を備えたこと を特徴とする真空ポンプ。
- 前記排気側ガス流路は、前記ロータの外周面と、これに対向するネジ溝ポンプステータと、により形成されるネジ溝状の流路であり、 前記固定部品は、前記ネジ溝ポンプステータであること を特徴とする請求項1に記載の真空ポンプ。
- 前記排気側ガス流路は、前記ロータの外周面に配設された回転翼と、該回転翼によって前記ガス流路の下流側へ向かう運動量が付与されたガス分子を前記ガス流路の下流側へ導く固定翼と、により形成される流路であり、 前記固定部品は、前記固定翼であること を特徴とする請求項1から2のいずれかに記載の真空ポンプ。
- 前記加熱手段は、前記固定部品に取付け部を設け、該取付け部にヒータを埋設することにより、該ヒータが前記固定部品を加熱する構造になっていること を特徴とする請求項1から3のいずれかに記載の真空ポンプ。
- 前記固定部品の前記取付け部は、シール手段が設けられることにより、大気側に配設されていること を特徴とする請求項4に記載の真空ポンプ。
- 前記断熱手段は、断熱空間と断熱スペーサによって、前記固定部品を断熱する構造であること を特徴とする請求項1から5のいずれかに記載の真空ポンプ。
- 前記ポンプベースは、少なくとも上ベース部と下ベース部に分割され、分割された該上ベース部と該下ベース部を締結手段で接合することにより、前記上ベース部と前記下ベース部とが熱伝導のある構造となっていること を特徴とする請求項1から6のいずれかに記載の真空ポンプ。
- 前記断熱空間は、 前記ポンプベースと前記固定部品の間の隙間であること を特徴とする請求項6に記載の真空ポンプ。
- 前記断熱スペーサは、 前記固定部品とその下部に位置する前記ポンプベースとの間に介在され、かつ、前記固定部品と前記ポンプベースとを締結することにより、前記固定部品を支持すること を特徴とする請求項6に記載の真空ポンプ。
- 前記上ベース部と前記下ベース部の双方、又は、いずれか一方に、冷却手段が設けられていること を特徴とする請求項7に記載の真空ポンプ。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14832961.8A EP3029328B1 (en) | 2013-07-31 | 2014-06-06 | Vacuum pump |
KR1020157032437A KR102167208B1 (ko) | 2013-07-31 | 2014-06-06 | 진공 펌프 |
CN201480040478.5A CN105358835A (zh) | 2013-07-31 | 2014-06-06 | 真空泵 |
US14/905,110 US10954962B2 (en) | 2013-07-31 | 2014-06-06 | Vacuum pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-158629 | 2013-07-31 | ||
JP2013158629A JP6735058B2 (ja) | 2013-07-31 | 2013-07-31 | 真空ポンプ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015015902A1 true WO2015015902A1 (ja) | 2015-02-05 |
Family
ID=52431446
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/065154 WO2015015902A1 (ja) | 2013-07-31 | 2014-06-06 | 真空ポンプ |
Country Status (6)
Country | Link |
---|---|
US (1) | US10954962B2 (ja) |
EP (1) | EP3029328B1 (ja) |
JP (1) | JP6735058B2 (ja) |
KR (1) | KR102167208B1 (ja) |
CN (1) | CN105358835A (ja) |
WO (1) | WO2015015902A1 (ja) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017089582A (ja) * | 2015-11-16 | 2017-05-25 | エドワーズ株式会社 | 真空ポンプ |
JP2022514236A (ja) * | 2018-12-12 | 2022-02-10 | エドワーズ リミテッド | 多段ターボ分子ポンプ |
WO2022124239A1 (ja) * | 2020-12-11 | 2022-06-16 | エドワーズ株式会社 | 真空ポンプ、真空ポンプの固定部品、及び真空ポンプの支持部品 |
WO2024135679A1 (ja) * | 2022-12-19 | 2024-06-27 | エドワーズ株式会社 | 真空ポンプ |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6664269B2 (ja) * | 2016-04-14 | 2020-03-13 | 東京エレクトロン株式会社 | 加熱装置およびターボ分子ポンプ |
JP7098882B2 (ja) * | 2017-04-03 | 2022-07-12 | 株式会社島津製作所 | 真空ポンプ |
JP6943629B2 (ja) | 2017-05-30 | 2021-10-06 | エドワーズ株式会社 | 真空ポンプとその加熱装置 |
JP6942610B2 (ja) * | 2017-07-14 | 2021-09-29 | エドワーズ株式会社 | 真空ポンプ、該真空ポンプに適用される温度調節用制御装置、検査用治具、及び温度調節機能部の診断方法 |
JP6957320B2 (ja) * | 2017-11-17 | 2021-11-02 | エドワーズ株式会社 | 真空ポンプ、および真空ポンプに備わる高温ステータ、ガス排気口 |
JP6967954B2 (ja) * | 2017-12-05 | 2021-11-17 | 東京エレクトロン株式会社 | 排気装置、処理装置及び排気方法 |
JP7224168B2 (ja) | 2017-12-27 | 2023-02-17 | エドワーズ株式会社 | 真空ポンプおよびこれに用いられる固定部品、排気ポート、制御手段 |
WO2019131682A1 (ja) | 2017-12-27 | 2019-07-04 | エドワーズ株式会社 | 真空ポンプおよびこれに用いられる固定部品、排気ポート、制御手段 |
JP7048391B2 (ja) | 2018-03-30 | 2022-04-05 | エドワーズ株式会社 | 真空ポンプ |
JP7164981B2 (ja) * | 2018-07-19 | 2022-11-02 | エドワーズ株式会社 | 真空ポンプ |
JP7467882B2 (ja) * | 2019-10-28 | 2024-04-16 | 株式会社島津製作所 | 真空ポンプ |
JP7566540B2 (ja) * | 2020-09-10 | 2024-10-15 | エドワーズ株式会社 | 真空ポンプ |
JP7459811B2 (ja) | 2021-01-25 | 2024-04-02 | 株式会社島津製作所 | 真空ポンプ |
JP2022145225A (ja) * | 2021-03-19 | 2022-10-03 | エドワーズ株式会社 | 真空ポンプ、真空ポンプの制御装置及びリモート制御装置 |
JP2023000108A (ja) * | 2021-06-17 | 2023-01-04 | エドワーズ株式会社 | 真空ポンプ |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09310696A (ja) * | 1996-03-21 | 1997-12-02 | Osaka Shinku Kiki Seisakusho:Kk | 分子ポンプ |
JP3098140B2 (ja) | 1993-06-17 | 2000-10-16 | 株式会社大阪真空機器製作所 | 複合分子ポンプ |
EP2228539A2 (en) * | 2003-08-08 | 2010-09-15 | Edwards Japan Limited | Vacuum pump |
JP4703279B2 (ja) * | 2004-06-25 | 2011-06-15 | 株式会社大阪真空機器製作所 | 複合分子ポンプの断熱構造 |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS63227989A (ja) * | 1987-03-16 | 1988-09-22 | Seiko Instr & Electronics Ltd | タ−ボ分子ポンプ |
JPH04116295A (ja) * | 1990-09-06 | 1992-04-16 | Fujitsu Ltd | 軸流分子ポンプ |
JP3160504B2 (ja) | 1995-09-05 | 2001-04-25 | 三菱重工業株式会社 | ターボ分子ポンプ |
DE19702456B4 (de) * | 1997-01-24 | 2006-01-19 | Pfeiffer Vacuum Gmbh | Vakuumpumpe |
JP2001132682A (ja) * | 1999-10-29 | 2001-05-18 | Shimadzu Corp | ターボ分子ポンプ |
JP3912964B2 (ja) * | 2000-07-03 | 2007-05-09 | 三菱重工業株式会社 | ターボ分子ポンプ |
US6793466B2 (en) * | 2000-10-03 | 2004-09-21 | Ebara Corporation | Vacuum pump |
JP4222747B2 (ja) * | 2000-10-03 | 2009-02-12 | 株式会社荏原製作所 | 真空ポンプ |
JP2002115692A (ja) | 2000-10-04 | 2002-04-19 | Osaka Vacuum Ltd | 複合真空ポンプ |
JP2002285992A (ja) * | 2001-03-27 | 2002-10-03 | Boc Edwards Technologies Ltd | 真空ポンプ装置 |
JP4250353B2 (ja) * | 2001-06-22 | 2009-04-08 | エドワーズ株式会社 | 真空ポンプ |
DE10142567A1 (de) | 2001-08-30 | 2003-03-20 | Pfeiffer Vacuum Gmbh | Turbomolekularpumpe |
JP3961273B2 (ja) * | 2001-12-04 | 2007-08-22 | Bocエドワーズ株式会社 | 真空ポンプ |
JP3098140U (ja) | 2003-05-28 | 2004-02-19 | スーパー工業株式会社 | 高圧水噴射装置 |
JP4916655B2 (ja) * | 2004-11-17 | 2012-04-18 | 株式会社島津製作所 | 真空ポンプ |
-
2013
- 2013-07-31 JP JP2013158629A patent/JP6735058B2/ja active Active
-
2014
- 2014-06-06 KR KR1020157032437A patent/KR102167208B1/ko active IP Right Grant
- 2014-06-06 US US14/905,110 patent/US10954962B2/en active Active
- 2014-06-06 WO PCT/JP2014/065154 patent/WO2015015902A1/ja active Application Filing
- 2014-06-06 EP EP14832961.8A patent/EP3029328B1/en active Active
- 2014-06-06 CN CN201480040478.5A patent/CN105358835A/zh active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP3098140B2 (ja) | 1993-06-17 | 2000-10-16 | 株式会社大阪真空機器製作所 | 複合分子ポンプ |
JPH09310696A (ja) * | 1996-03-21 | 1997-12-02 | Osaka Shinku Kiki Seisakusho:Kk | 分子ポンプ |
EP2228539A2 (en) * | 2003-08-08 | 2010-09-15 | Edwards Japan Limited | Vacuum pump |
JP4703279B2 (ja) * | 2004-06-25 | 2011-06-15 | 株式会社大阪真空機器製作所 | 複合分子ポンプの断熱構造 |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017089582A (ja) * | 2015-11-16 | 2017-05-25 | エドワーズ株式会社 | 真空ポンプ |
WO2017086135A1 (ja) * | 2015-11-16 | 2017-05-26 | エドワーズ株式会社 | 真空ポンプ |
KR20180082423A (ko) | 2015-11-16 | 2018-07-18 | 에드워즈 가부시키가이샤 | 진공 펌프 |
CN108350894A (zh) * | 2015-11-16 | 2018-07-31 | 埃地沃兹日本有限公司 | 真空泵 |
US10907653B2 (en) | 2015-11-16 | 2021-02-02 | Edwards Japan Limited | Vacuum pump |
KR102620442B1 (ko) * | 2015-11-16 | 2024-01-03 | 에드워즈 가부시키가이샤 | 진공 펌프 |
JP2022514236A (ja) * | 2018-12-12 | 2022-02-10 | エドワーズ リミテッド | 多段ターボ分子ポンプ |
WO2022124239A1 (ja) * | 2020-12-11 | 2022-06-16 | エドワーズ株式会社 | 真空ポンプ、真空ポンプの固定部品、及び真空ポンプの支持部品 |
WO2024135679A1 (ja) * | 2022-12-19 | 2024-06-27 | エドワーズ株式会社 | 真空ポンプ |
Also Published As
Publication number | Publication date |
---|---|
EP3029328A1 (en) | 2016-06-08 |
JP6735058B2 (ja) | 2020-08-05 |
US10954962B2 (en) | 2021-03-23 |
EP3029328B1 (en) | 2023-10-25 |
KR20160037837A (ko) | 2016-04-06 |
US20160160877A1 (en) | 2016-06-09 |
JP2015031153A (ja) | 2015-02-16 |
KR102167208B1 (ko) | 2020-10-19 |
EP3029328A4 (en) | 2017-03-22 |
CN105358835A (zh) | 2016-02-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
WO2015015902A1 (ja) | 真空ポンプ | |
KR102214002B1 (ko) | 진공 펌프 | |
WO2019188732A1 (ja) | 真空ポンプ | |
JP6287475B2 (ja) | 真空ポンプ | |
JP6484919B2 (ja) | ターボ分子ポンプ | |
KR102123135B1 (ko) | 진공 펌프 | |
WO2014045438A1 (ja) | ターボ分子ポンプ | |
KR102214001B1 (ko) | 진공 펌프, 및 이 진공 펌프에 이용되는 단열 스페이서 | |
EP2894347B1 (en) | Stator member and vacuum pump | |
KR20220092858A (ko) | 진공 펌프 | |
JP2020012423A (ja) | 真空ポンプ | |
CN103104512A (zh) | 涡轮分子泵装置 | |
JP2016518550A (ja) | ポンプ装置 | |
WO2018043072A1 (ja) | 真空ポンプ、および真空ポンプに備わる回転円筒体 | |
WO2023106154A1 (ja) | 真空ポンプおよび良熱伝導性部品 | |
US20160090979A1 (en) | Pump arrangement | |
JP2004270692A (ja) | 分子ポンプの断熱構造 | |
JP7378447B2 (ja) | 真空ポンプおよび固定部品 | |
JP7546410B2 (ja) | 真空ポンプおよび真空ポンプ用回転翼 | |
JP2004239258A (ja) | 真空ポンプ装置 | |
JP2024107319A (ja) | ターボ分子ポンプ |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201480040478.5 Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14832961 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 20157032437 Country of ref document: KR Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14905110 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2014832961 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |