WO1996013667A1 - Reibungsvakuumpumpe mit kühlung - Google Patents
Reibungsvakuumpumpe mit kühlung Download PDFInfo
- Publication number
- WO1996013667A1 WO1996013667A1 PCT/EP1995/003140 EP9503140W WO9613667A1 WO 1996013667 A1 WO1996013667 A1 WO 1996013667A1 EP 9503140 W EP9503140 W EP 9503140W WO 9613667 A1 WO9613667 A1 WO 9613667A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- housing
- pump according
- pump
- drive motor
- fan
- Prior art date
Links
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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
- F04D17/168—Pumps specially adapted to produce a vacuum
-
- 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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/5806—Cooling the drive system
Definitions
- the invention relates to a single-flow friction vacuum pump with a housing in which an inlet, the pump-active surfaces and a drive motor are arranged axially one behind the other.
- a friction vacuum pump of this type is known from DE-U-80 27 697. Cooling is usually required when operating pumps of this type. Water cooling is very effective, but makes the operation of the pump dependent on the presence of a cooling water connection. In addition, the design effort required for water cooling on the pump itself is relatively high. Furthermore, it is known to use a separate air cooling unit with a fan that can be placed on the outside of the pump housing. On the one hand, such a cooling unit only cools the outer surface of the pump housing, so its cooling effect is limited. On the other hand, additional connection work is required if cooling is required.
- the present invention has for its object to equip a friction vacuum pump of the type mentioned with an improved and easier-to-use air cooling. According to the invention, this object is achieved in that its housing wall is equipped with air intake and air outlet openings and in that a fan is integrated in its housing.
- the fan is located in the housing, preferably to the side of the drive motor, the cooling effect is particularly good.
- the cooled surface of the pump acts more effectively than is possible by external (position-dependent) cooling fins.
- the area for heat transfer is significantly larger than with a ribbed outer surface, since the housing also contributes to cooling with the inner surface.
- the additional fan which can be switched on if required, conveys the air directly to the places that generate heat and thus have the highest temperature level.
- the "cooling chain” heat transfers, heat conduction paths, heat capacities, heat transfer paths etc.
- the heat via which the heat has to be transported in the prior art, becomes shorter with a steadily decreasing temperature level, so that the additional fan is dimensioned smaller and thus even into the pump can be integrated.
- the built-in fan is expediently operated in such a way that it is controlled by a temperature sensor.
- the pump is then constantly protected against an undesirable increase in temperature.
- inlet openings for the cold supply air and outlet openings for the warm exhaust air are provided in the housing wall of the pump, a chimney effect can be achieved by skilful flow supply, which flows around the wall from the inside and outside and thus creates a natural forced ventilation. This cools additionally and more effectively than the existing free convection on the outside of the wall.
- the air flow is chosen so that the cooling effect 'is dependent on the position of the pump. Due to a conical housing design, the air flow is not obstructed by adjacent parts even when the pump is installed in a system. In addition, there is sufficient space in the drive area in order to be able to accommodate all the necessary components, including the fan, in the housing with an axially short design.
- the pump itself is denoted by 1, its inlet by 2 and its outlet by 3.
- the housing of the pump 1 comprises the two sections 4 and 5.
- the housing section 4 surrounds the stator 6 and the rotor 7 of the friction pump.
- Figures 1 and 4 show that components of the friction pump are turbomolecular pump stages 8 and Siegbahnpumpenworkn 9.
- the housing section 5 surrounds the drive motor 11, the stator of which is designated by 12 and the rotor of which is designated by 13.
- the housing section 5 is part of a chassis 14 with the interior 15, in which the drive motor 11 and other components are located. Otherwise, the chassis 14 supports all other components of the pump 1.
- the interior 15 is covered with the disk 16 on the end face opposite the inlet 2.
- the shaft 17 carrying the rotor 7 is also mounted in the chassis 14, specifically in such a way that the rotor 13 of the drive motor 11 is located between its bearings 18 and 19.
- the rotor 13 is located within a space 20 which is formed by the chassis 14 and by a can 21. This space 20 is gas-tight to the outside. This runs the Rotor 13 of the drive motor 11 in a vacuum, while the motor stator 12 is outside the vacuum. This means that a gas-tight bushing is not required.
- the spring 22 which serves to generate the bearing contact forces. It is assigned to the drive end of the shaft 17 and is designed as a conical spiral spring. Compared to the disc springs normally used in this area, a conically shaped spiral spring has a much flatter characteristic so that an essentially constant contact force is ensured which is independent of tolerances. Compared to cylindrical spiral springs, a conical spiral spring has the advantage that its axial length is smaller.
- the exterior of the entire pump 1 is essentially conical.
- the cross section of its housing or its housing sections 4, 5 widens from the inlet 2 to the drive side. This measure allows an axially short construction, since there is sufficient space on the drive side to be able to arrange several of the components arranged there side by side.
- a fan 23 is located in the interior 15 of the chassis 14. It is arranged on the side next to the drive motor 11 and can either be in continuous operation or be controlled by a temperature sensor (not shown). Adequate cooling of the pump, in particular of its drive motor 11, is thereby ensured.
- FIGS. 1 to 6 all of the exemplary embodiments shown in FIGS. 1 to 6 are equipped with a flat connecting surface 24. It is the result of the intersection of a plane with the housing section 5. All operating elements (fore-vacuum connection 3, connector 25 for the frequency converter, ventilation connection 26) are concentrated on the connection surface 24 and therefore accessible and easy to handle in any position of the pump.
- the plane generating the connecting surface 24 extends parallel to the shaft 17 of the pump 1.
- a flat surface 27 with an opening 28 is also provided on the side of the chassis 5 opposite the connecting surface 24, a flat surface 27 with an opening 28 is also provided.
- This opening 28, equipped with a grille 29, serves as a suction opening for the fan 23 arranged next to it.
- the sucked-in cooling air exits again through openings 31 and 32 after it has flowed around the drive motor 11.
- the openings 31 are located in the pane 16 covering the interior 15 of the chassis 14.
- the openings 32 open into a groove 33 which is located between the housing sections 4 and 5.
- the plane generating the connecting surface 24 forms an angle with the shaft 17, in such a way that the connecting surface 24 is larger in comparison with the connecting surface 24 in the exemplary embodiment according to FIGS. 1 to 3 is.
- the suction openings 34 and 35 assigned to the fan 23 are also located in the disk 16 and in the groove 33, respectively.
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)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP95929813A EP0789815B1 (de) | 1994-10-31 | 1995-08-08 | Reibungsvakuumpumpe mit kühlung |
JP8514272A JPH10507806A (ja) | 1994-10-31 | 1995-08-08 | 冷却装置を備えた摩擦真空ポンプ |
US08/633,827 US6019581A (en) | 1995-08-08 | 1995-08-08 | Friction vacuum pump with cooling arrangement |
DE59505320T DE59505320D1 (de) | 1994-10-31 | 1995-08-08 | Reibungsvakuumpumpe mit kühlung |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4438812A DE4438812A1 (de) | 1994-10-31 | 1994-10-31 | Reibungsvakuumpumpe mit Kühlung |
DEP4438812.8 | 1994-10-31 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996013667A1 true WO1996013667A1 (de) | 1996-05-09 |
Family
ID=6532098
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP1995/003140 WO1996013667A1 (de) | 1994-10-31 | 1995-08-08 | Reibungsvakuumpumpe mit kühlung |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0789815B1 (de) |
JP (1) | JPH10507806A (de) |
DE (2) | DE4438812A1 (de) |
WO (1) | WO1996013667A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1247987A2 (de) * | 2001-03-19 | 2002-10-09 | Seiko Instruments Inc. | Turbomolekularpumpe |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19937392A1 (de) * | 1999-08-07 | 2001-02-08 | Leybold Vakuum Gmbh | Reibungsvakuumpumpe mit pumpaktiven Elementen |
DE10113329A1 (de) * | 2001-03-20 | 2002-09-26 | Leybold Vakuum Gmbh | Turbomolekularpumpe |
DE102013203421A1 (de) * | 2013-02-28 | 2014-08-28 | Pfeiffer Vacuum Gmbh | Vakuumpumpe |
JP6912196B2 (ja) | 2016-12-28 | 2021-08-04 | エドワーズ株式会社 | 真空ポンプ及び該真空ポンプに適用されるコネクタ、制御装置 |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE605902C (de) * | 1932-01-08 | 1934-11-20 | Hugo Seemann Dr | Turbohochvakuumpumpe |
CH291846A (de) * | 1950-04-12 | 1953-07-15 | Philips Nv | Hochvakuummolekularpumpe. |
FR2629877A1 (fr) * | 1987-12-25 | 1989-10-13 | Sholokhov Valery | Pompe moleculaire a vide |
JPH01267392A (ja) * | 1988-04-15 | 1989-10-25 | Hitachi Ltd | ターボ真空ポンプ |
EP0477924A1 (de) * | 1990-09-28 | 1992-04-01 | Hitachi, Ltd. | Turbovakuumpumpe |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2726807A (en) * | 1950-09-28 | 1955-12-13 | Finnell System Inc | Vacuum apparatus for water and dirt removal |
DE1025557B (de) * | 1952-08-27 | 1958-03-06 | Ernst Huerner | Elektrisch angetriebener Axialluefter aus saeurefestem Kunststoff mit in den Lueftereingebautem Elektromotor, insbesondere zur Foerderung saeurehaltiger Medien |
-
1994
- 1994-10-31 DE DE4438812A patent/DE4438812A1/de not_active Withdrawn
-
1995
- 1995-08-08 EP EP95929813A patent/EP0789815B1/de not_active Expired - Lifetime
- 1995-08-08 JP JP8514272A patent/JPH10507806A/ja active Pending
- 1995-08-08 WO PCT/EP1995/003140 patent/WO1996013667A1/de active IP Right Grant
- 1995-08-08 DE DE59505320T patent/DE59505320D1/de not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE605902C (de) * | 1932-01-08 | 1934-11-20 | Hugo Seemann Dr | Turbohochvakuumpumpe |
CH291846A (de) * | 1950-04-12 | 1953-07-15 | Philips Nv | Hochvakuummolekularpumpe. |
FR2629877A1 (fr) * | 1987-12-25 | 1989-10-13 | Sholokhov Valery | Pompe moleculaire a vide |
JPH01267392A (ja) * | 1988-04-15 | 1989-10-25 | Hitachi Ltd | ターボ真空ポンプ |
EP0477924A1 (de) * | 1990-09-28 | 1992-04-01 | Hitachi, Ltd. | Turbovakuumpumpe |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 14, no. 29 (M - 922) 19 January 1990 (1990-01-19) * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1247987A2 (de) * | 2001-03-19 | 2002-10-09 | Seiko Instruments Inc. | Turbomolekularpumpe |
EP1247987A3 (de) * | 2001-03-19 | 2002-11-13 | Seiko Instruments Inc. | Turbomolekularpumpe |
US6644938B2 (en) | 2001-03-19 | 2003-11-11 | Seiko Instruments Inc. | Turbo molecular pump |
KR100842977B1 (ko) * | 2001-03-19 | 2008-07-01 | 에드워즈 가부시키가이샤 | 터보분자펌프 |
Also Published As
Publication number | Publication date |
---|---|
DE59505320D1 (de) | 1999-04-15 |
JPH10507806A (ja) | 1998-07-28 |
DE4438812A1 (de) | 1996-05-02 |
EP0789815B1 (de) | 1999-03-10 |
EP0789815A1 (de) | 1997-08-20 |
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