EP0535365A1 - Pompe centrifuge - Google Patents
Pompe centrifuge Download PDFInfo
- Publication number
- EP0535365A1 EP0535365A1 EP92114535A EP92114535A EP0535365A1 EP 0535365 A1 EP0535365 A1 EP 0535365A1 EP 92114535 A EP92114535 A EP 92114535A EP 92114535 A EP92114535 A EP 92114535A EP 0535365 A1 EP0535365 A1 EP 0535365A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- housing
- centrifugal pump
- pump
- fan wheel
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
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
- F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
- F04D7/02—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type
- F04D7/06—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts of centrifugal type the fluids being hot or corrosive, e.g. liquid metals
-
- 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
- F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
- F04D29/5893—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps heat insulation or conduction
Definitions
- the invention relates to a centrifugal pump, in particular for conveying hot media, with a pump housing, a shaft emerging from the pump housing, a shaft seal, the housing of which is connected to the pump housing, with a fan wheel fastened to the shaft and with a region of the fan wheel and perforated fender covering axially adjoining areas on both sides.
- the lifespan of the shaft seal depends on the temperature. In addition to design features that inhibit the heat flow from the pump to the seal, it is therefore known to cool the seal housing by means of an air flow that is generated by a fan arranged on the shaft. This is surrounded by a mudguard that is broken through to allow heat and air exchange. For example, it can contain longitudinal slots (FR-A 22 20 723). Because the seal usually, at least after a certain amount of wear, leakage fluid passes through, there is a risk that the leakage fluid reaches the fan wheel and is thrown off by it with a considerable range. This could be countered by using a particularly high-quality seal, which is then also particularly complex. Or you can provide a case drain chamber after the mechanical seal, which is provided with a special drain (DE-A 26 30 513); this is expensive.
- the invention solves this problem in a simpler manner by providing that the mudguard is designed to be unbroken in the area of the axial extent of the fan wheel. If medium is sprayed outside, it is caught by the unbroken part of the fender.
- the function of the fan wheel is not affected because the inflow to and from the fan wheel is mainly influenced by the conditions on one or the other axial side of the fan wheel. In any case, this applies if, according to the invention, the ratio of the outer diameter of the fan wheel to the fender diameter is less than 0.8, preferably also less than 0.6.
- the proportion of the open area of the fender in its perforated areas should be at least 60%. At least, this applies when the fender pumps and connects more or less closely to the housing parts on the drive side.
- the shaft is expediently surrounded by an elongated cooling housing between the pump housing and the seal housing at a short distance. It has been shown that its known effect can be increased if a throttle is arranged between the interior of the seal housing and the adjoining interior of the cooling housing.
- thermal insulation is arranged between a wall delimiting the pump interior on the drive side and a wall that closes off the pump housing on the drive side and carries the seal housing (directly or indirectly via the cooling housing).
- This thermal insulation can be formed by a cavity, which is preferably filled with air or with the medium to be pumped.
- a relatively large blade angle of the fan wheel has proven to be expedient, namely an angle on the outer diameter of the fan wheel between the blades and the circumferential direction between 20 and 40 degrees.
- the pump housing 1, which receives the pump impeller 2, is closed on the drive side by a cover 3, which comprises a wall 5 delimiting the pump interior 4 and a wall 6 on the drive side which is spaced therefrom, including an intermediate space 7.
- the wall parts 5 and 6 form a seat for a bearing bush 8 which receives the pump shaft 9.
- the wall 6 of the pump housing cover 3 is integrally connected to the elongated cooling housing 10, which the shaft 9 surrounds at a short distance and carries at its end the seal housing 11, which contains suitable sealant 12, for example shaft seals.
- the bearing bush 8 prevents the free circulation of the medium from the pump interior 4 to the cooling housing 10.
- a throttle 13 prevents the circulation of the medium enclosed in the cooling housing 10 to the interior of the seal housing 11. Both reduce the heat transfer.
- the bearing bush 8 which bridges the gap between the walls 5 and 6, consists of poorly heat-conducting material (for example coal or ceramic) and / or has a small cross-section, insofar as it consists of good heat-conducting material, to thereby reduce the heat transfer from the wall 5 to the cooling housing 10.
- the shaft 9 merges into a coupling sleeve 14 which is mounted in a bearing housing 16 by means of a roller bearing 15 which, together with a flange 17, is supported by means of ribs 18 by a flange 19 which is connected to the pump housing cover 3 is.
- the fan wheel 20 which is designed as an axial fan, sits on the shaft 9 between the seal housing 11 and the coupling sleeve 14. As shown at 21, its wings are twisted at their outer circumference by an unusually strong angle with respect to the circumferential direction, which is between 20 and 40 degrees.
- a cylindrical mudguard 24 supported by the ribs 18, which connects to the flanges 17 and 19 without or with only a small distance and preferably extends over the full circumference, but at least over the top and side regions thereof. As shown at 22, the entire surface is perforated with the exception of the region 23, which corresponds to the axial extent of the fan wheel 20.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE9111161U DE9111161U1 (de) | 1991-09-09 | 1991-09-09 | Kreiselpumpe |
| DE9111161U | 1991-09-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0535365A1 true EP0535365A1 (fr) | 1993-04-07 |
| EP0535365B1 EP0535365B1 (fr) | 1995-10-25 |
Family
ID=6871059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92114535A Expired - Lifetime EP0535365B1 (fr) | 1991-09-09 | 1992-08-26 | Pompe centrifuge |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0535365B1 (fr) |
| AT (1) | ATE129547T1 (fr) |
| DE (2) | DE9111161U1 (fr) |
| DK (1) | DK0535365T3 (fr) |
| ES (1) | ES2079757T3 (fr) |
| GR (1) | GR3018394T3 (fr) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027740A1 (fr) * | 1995-03-06 | 1996-09-12 | Sterling Fluid Systems (Germany) Gmbh | Pompe permettant de refouler des fluides chauds |
| CN103644137A (zh) * | 2013-12-04 | 2014-03-19 | 江苏大学 | 一种外壁面带冷却水套的热水循环泵悬架体 |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10013152A1 (de) * | 2000-03-17 | 2001-09-20 | Ksb Ag | Dichtungsgehäuse |
| CN103267020A (zh) * | 2013-04-24 | 2013-08-28 | 欧技工业设备（江苏）有限公司 | 高温熔盐泵 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2220723A1 (fr) * | 1973-03-08 | 1974-10-04 | Borg Warner | |
| DE2630513A1 (de) * | 1976-07-07 | 1978-01-12 | Allweiler Ag | Kuehleinrichtung fuer ein pumpenaggregat |
| US4632643A (en) * | 1985-02-14 | 1986-12-30 | Nielsen Axel L | Sump pump |
-
1991
- 1991-09-09 DE DE9111161U patent/DE9111161U1/de not_active Expired - Lifetime
-
1992
- 1992-08-26 DE DE59204123T patent/DE59204123D1/de not_active Expired - Lifetime
- 1992-08-26 DK DK92114535.5T patent/DK0535365T3/da active
- 1992-08-26 AT AT92114535T patent/ATE129547T1/de not_active IP Right Cessation
- 1992-08-26 EP EP92114535A patent/EP0535365B1/fr not_active Expired - Lifetime
- 1992-08-26 ES ES92114535T patent/ES2079757T3/es not_active Expired - Lifetime
-
1995
- 1995-12-13 GR GR950403531T patent/GR3018394T3/el unknown
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2220723A1 (fr) * | 1973-03-08 | 1974-10-04 | Borg Warner | |
| DE2630513A1 (de) * | 1976-07-07 | 1978-01-12 | Allweiler Ag | Kuehleinrichtung fuer ein pumpenaggregat |
| US4632643A (en) * | 1985-02-14 | 1986-12-30 | Nielsen Axel L | Sump pump |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996027740A1 (fr) * | 1995-03-06 | 1996-09-12 | Sterling Fluid Systems (Germany) Gmbh | Pompe permettant de refouler des fluides chauds |
| AU700101B2 (en) * | 1995-03-06 | 1998-12-24 | Sterling Fluid Systems (Germany) Gmbh | Pump for delivering hot media |
| US5911565A (en) * | 1995-03-06 | 1999-06-15 | Sterling Fluid Systems (Germany) Gmbh | Pump for conveying hot media |
| CN103644137A (zh) * | 2013-12-04 | 2014-03-19 | 江苏大学 | 一种外壁面带冷却水套的热水循环泵悬架体 |
Also Published As
| Publication number | Publication date |
|---|---|
| GR3018394T3 (en) | 1996-03-31 |
| DE9111161U1 (de) | 1993-01-14 |
| EP0535365B1 (fr) | 1995-10-25 |
| DE59204123D1 (de) | 1995-11-30 |
| ATE129547T1 (de) | 1995-11-15 |
| ES2079757T3 (es) | 1996-01-16 |
| DK0535365T3 (da) | 1996-02-12 |
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