EP0107691A1 - Abdichtung für drehkolbenpumpe. - Google Patents
Abdichtung für drehkolbenpumpe.Info
- Publication number
- EP0107691A1 EP0107691A1 EP83901375A EP83901375A EP0107691A1 EP 0107691 A1 EP0107691 A1 EP 0107691A1 EP 83901375 A EP83901375 A EP 83901375A EP 83901375 A EP83901375 A EP 83901375A EP 0107691 A1 EP0107691 A1 EP 0107691A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- roots
- compressor according
- liquid pump
- roots compressor
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C27/00—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids
- F04C27/008—Sealing arrangements in rotary-piston pumps specially adapted for elastic fluids for other than working fluid, i.e. the sealing arrangements are not between working chambers of the machine
- F04C27/009—Shaft sealings specially adapted for pumps
Definitions
- the invention relates to Roots compressors, preferably Roots vacuum pumps, the shafts of which are mounted at least on one side in a partition or a separating housing between the pumping chamber and the gear chamber which is partly filled with oil and is provided with sealing elements.
- Lip seals are due to the low temperature-Lastun ⁇ j of susceptibility and -Lifetime only at low pressure differentials applicable.
- Rectangular seals still allow a small amount of gas to be exchanged between the pumping chamber and the gearbox, so they are not absolutely leak-proof, and moreover, because of the limited choice of works, they cannot always be used against somewhat aggressive media.
- the invention is based on the idea of creating a significant simplification, which is achieved according to the invention by sealing in a known manner by means of a mechanical seal and, in addition, by a liquid pump on the shaft of one of the Roots is arranged and the pressure side of the liquid pump is directly connected to the mechanical seal spaces'. This saves the previously described complex circuit with a pump and motor arranged outside the compressor.
- the liquid pump is also expedient, as proposed according to the invention, to design the liquid pump as a self-priming side channel pump.
- This pump with the appropriate arrangement of suction and pressure slots, is always able to suck in the oil even when the liquid level in the gear chamber is below the liquid purape. If a non-self-priming pump is used, one would have to ensure by appropriate valves on the suction or pressure side in the feed and discharge lines of the liquid pump that no air can enter this liquid pump when the roller compressor is at a standstill, otherwise the Pump is unable to draw from a lower oil level itself and thus to become functional again
- Roots compressors are usually mounted on both sides, it is also expedient according to the invention to connect the two transmission spaces in the geodetically lower region so that a return flow of part of the oil from the second transmission space into the transmission space in which "the liquid pump works". This connection can be provided inside or outside the pump.
- an externally located connecting pipe can be provided with corresponding cooling fins.
- the invention When using a self-priming side channel pump, the invention further proposes. Arrange suction and pressure opening of the stage in the geodetically located area above the pump shaft. This ensures that sufficient liquid remains in the pump and immediately after the start-up of the Roots compressor - S -
- Another particularly advantageous and simple embodiment is seen according to the invention in that the filling hole for the liquid pump - which in any case must be at least partially filled with liquid before the first start-up - and the filling hole for the gear housing are combined.
- This advantageous combination can however only be used if a side channel pump as a liquid pump is used because then arranged no ent ⁇ speaking shut-off or check valves in the feed and discharge lines of the pump were ⁇ to the proper afterwards for operation the liquid pump are necessary.
- FIG. 1 shows a schematic longitudinal section and Figure 2 shows a schematic cross section through a ver ⁇ in. Tikaler direction perfused 'Wälzkölbenver Congressr bei coper with supporting the shafts.
- the housing 1 and 2 are the two shafts on which the rotary pistons 3 and 4 are attached.
- the housing 5 forms, together with the rotary lobes, the scooping space.
- the inlet connection 6 and the outlet connection 7 are arranged on the housing 5.
- To the side of the housing are partition walls or housings 8 and 9 with the bearings 10 and 11.
- the shaft bushings between the head and the gear spaces 12 and 13 are sealed by mechanical seals 14 and 15.
- the liquid pump 16 is located on the one compressor shaft.
- the suction port of the liquid pump is immersed in the gear oil.
- the oil is supplied to the mechanical seal spaces via channels 17 and / or outer pipelines 18.
- the two gear spaces are connected to one another by pipelines or channels 19, so that the liquid level in both gear spaces can be compensated for.
- a heat exchanger and an oil reservoir can be switched into the liquid circuit.
- the heat exchanger or the oil storage container is schematically marked 20 in a pipeline, without wishing to indicate a particular position.
- the oil is expediently fed to the seals on the side of the transmission so that it can flow freely to the transmission spaces and a current which is sufficient for cooling flows back from the transmission space 13 via the cooler 20 to the transmission space 12 and thus to the suction side of the pump 16.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
- Closures For Containers (AREA)
Description
Claims
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT83901375T ATE29164T1 (de) | 1982-05-06 | 1983-05-03 | Abdichtung fuer drehkolbenpumpe. |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE3216990A DE3216990A1 (de) | 1982-05-06 | 1982-05-06 | Waelzkolbenpumpe |
| DE3216990 | 1982-05-06 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0107691A1 true EP0107691A1 (de) | 1984-05-09 |
| EP0107691B1 EP0107691B1 (de) | 1987-08-26 |
Family
ID=6162896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP83901375A Expired EP0107691B1 (de) | 1982-05-06 | 1983-05-03 | Abdichtung für drehkolbenpumpe |
Country Status (10)
| Country | Link |
|---|---|
| EP (1) | EP0107691B1 (de) |
| JP (1) | JPS59500825A (de) |
| AU (1) | AU1516583A (de) |
| DE (2) | DE3216990A1 (de) |
| DK (1) | DK153174C (de) |
| ES (1) | ES271911Y (de) |
| IT (1) | IT1212953B (de) |
| NO (1) | NO834827L (de) |
| WO (1) | WO1983004075A1 (de) |
| ZA (1) | ZA833087B (de) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4787831A (en) * | 1983-09-20 | 1988-11-29 | Air Products And Chemicals, Inc. | Dual seal system for roots blower |
| DE3344953A1 (de) * | 1983-12-13 | 1985-06-20 | Leybold-Heraeus GmbH, 5000 Köln | Zweiwellen-vakuumpumpe mit getrieberaum-evakuierung |
| DE3540959A1 (de) * | 1984-12-22 | 1986-07-03 | Leybold-Heraeus GmbH, 5000 Köln | Oelfoerdereinrichtung fuer vakuumpumpen |
| DE3574274D1 (en) * | 1985-04-24 | 1989-12-21 | Leybold Ag | Multistage vacuum pump |
| DE102014101113A1 (de) * | 2014-01-30 | 2015-07-30 | Pfeiffer Vacuum Gmbh | Vakuumpumpe |
| CN106930945B (zh) * | 2015-12-29 | 2021-03-02 | 罗伯特·博世有限公司 | 增压器 |
Family Cites Families (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB217575A (en) * | 1923-06-11 | 1924-10-16 | Sulzer Ag | Improvements in or relating to rotary compressors |
| DE471012C (de) * | 1925-06-06 | 1929-03-19 | Der Maschinenfabriken Escher A | Einrichtung zum Abdichten von insbesondere zum Foerdern von Gasen und Daempfen bestimmten Maschinen mit umlaufenden Wellen |
| DE684266C (de) * | 1937-01-01 | 1939-11-24 | Bosch Gmbh Robert | Regelvorrichtung fuer das Ladegeblaese einer Brennkraftmaschine |
| US2178425A (en) * | 1937-02-18 | 1939-10-31 | Gen Electric | Refrigerating machine |
| US2620124A (en) * | 1946-12-26 | 1952-12-02 | Gen Motors Corp | Compressor apparatus |
| US2679412A (en) * | 1950-03-24 | 1954-05-25 | Read Standard Corp | Seal |
| US2677944A (en) * | 1950-12-01 | 1954-05-11 | Alonzo W Ruff | Plural stage refrigeration apparatus |
| GB734893A (en) * | 1953-05-28 | 1955-08-10 | Harry Skeet Broom | Improvements in or relating to rotary air compressors |
| DE1021530B (de) * | 1955-01-17 | 1957-12-27 | Leybolds Nachfolger E | Drehkolbengeblaese |
| US3292847A (en) * | 1964-11-03 | 1966-12-20 | Dresser Ind | Lubricant sealing means for rotary positive displacement pump |
| US3556697A (en) * | 1969-04-10 | 1971-01-19 | Ingersoll Rand Co | Sealing arrangement for vacuum pump |
| DE1939717B2 (de) * | 1969-08-05 | 1978-03-23 | Leybold-Heraeus Gmbh & Co Kg, 5000 Koeln | Waelzkolbenpumpe |
| GB1378543A (en) * | 1971-07-08 | 1974-12-27 | Borg Warner | Rotary compressor of sliding vane type |
| GB1552385A (en) * | 1975-05-13 | 1979-09-12 | Maekawa Seisakusho Kk | Device for compressing or expanding a gas or for pumping a liquid |
| DE3007267A1 (de) * | 1980-02-27 | 1981-09-03 | Leybold Heraeus Gmbh & Co Kg | Wellendichtung fuer waelzkolbenpumpen |
-
1982
- 1982-05-06 DE DE3216990A patent/DE3216990A1/de not_active Withdrawn
-
1983
- 1983-05-02 ZA ZA833087A patent/ZA833087B/xx unknown
- 1983-05-02 ES ES1983271911U patent/ES271911Y/es not_active Expired
- 1983-05-03 JP JP58501522A patent/JPS59500825A/ja active Pending
- 1983-05-03 AU AU15165/83A patent/AU1516583A/en not_active Abandoned
- 1983-05-03 WO PCT/EP1983/000116 patent/WO1983004075A1/de not_active Ceased
- 1983-05-03 EP EP83901375A patent/EP0107691B1/de not_active Expired
- 1983-05-03 DE DE8383901375T patent/DE3373202D1/de not_active Expired
- 1983-05-06 IT IT8309417A patent/IT1212953B/it active
- 1983-12-27 NO NO834827A patent/NO834827L/no unknown
-
1984
- 1984-01-05 DK DK003984A patent/DK153174C/da not_active IP Right Cessation
Non-Patent Citations (1)
| Title |
|---|
| See references of WO8304075A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| DK153174B (da) | 1988-06-20 |
| AU1516583A (en) | 1983-12-02 |
| IT1212953B (it) | 1989-12-07 |
| JPS59500825A (ja) | 1984-05-10 |
| DK3984A (da) | 1984-01-05 |
| ES271911U (es) | 1984-08-01 |
| DE3373202D1 (en) | 1987-10-01 |
| WO1983004075A1 (fr) | 1983-11-24 |
| NO834827L (no) | 1983-12-27 |
| DK153174C (da) | 1988-12-12 |
| DE3216990A1 (de) | 1983-11-10 |
| ZA833087B (en) | 1984-01-25 |
| DK3984D0 (da) | 1984-01-05 |
| EP0107691B1 (de) | 1987-08-26 |
| IT8309417A0 (it) | 1983-05-06 |
| ES271911Y (es) | 1985-02-16 |
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