EP0179311A1 - Compresseur à anneau liquide - Google Patents

Compresseur à anneau liquide Download PDF

Info

Publication number
EP0179311A1
EP0179311A1 EP85112413A EP85112413A EP0179311A1 EP 0179311 A1 EP0179311 A1 EP 0179311A1 EP 85112413 A EP85112413 A EP 85112413A EP 85112413 A EP85112413 A EP 85112413A EP 0179311 A1 EP0179311 A1 EP 0179311A1
Authority
EP
European Patent Office
Prior art keywords
compressor
pressure passage
opening
pressure
liquid ring
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
Application number
EP85112413A
Other languages
German (de)
English (en)
Other versions
EP0179311B1 (fr
Inventor
Siegfried Dipl.-Ing. Auschrat
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sihi GmbH and Co KG
Original Assignee
Sihi GmbH and Co KG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sihi GmbH and Co KG filed Critical Sihi GmbH and Co KG
Priority to AT85112413T priority Critical patent/ATE39549T1/de
Publication of EP0179311A1 publication Critical patent/EP0179311A1/fr
Application granted granted Critical
Publication of EP0179311B1 publication Critical patent/EP0179311B1/fr
Expired legal-status Critical Current

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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
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/122—Arrangements for supercharging the working space
    • 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
    • F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
    • F04C19/005—Details concerning the admission or discharge

Definitions

  • the invention relates to a liquid ring compressor, in particular for the operating range of intake pressures below 1 bar, with a control disk arranged closely adjacent to at least one end face of the impeller of the possibly last compressor stage, with a pressure passage for the pumped medium.
  • the minimum intake pressures that can be achieved by the compressors depend on the design of such compressors, but also on the vapor pressure of the medium used as the operating fluid. If * compressors are operated with suction-side pressure that is close to the vapor pressure of the operating fluid, the mass flow of gas that is pumped by the pump becomes correspondingly low and the proportion of steam on the compressor suction side is correspondingly large. Cavitation in the compressor then occurs, which is particularly evident on the control disc in the area of the pressure passage of the last compressor stage, if any, and on the impellers. The reason for this is that with such minimal mass flows in the vane cells shortly before opening against the pressure chamber of the compressor of the possibly last compressor stage, there is still a relatively high negative pressure.
  • Liquid accumulates in the pressure chamber itself - since there is hardly any mass flow - and this finally also covers the initial area of the pressure passage, so that when the impeller cells are opened towards the pressure chamber, there is an abrupt return flow of liquid into the cell, so high Speeds are reached that erosion damage occurs at the wing and pressure passage edges and that evaporation occurs and the vapor bubbles then collapse again when they enter the wing cells and the subsequent rise in pressure and cause the undesirable cavitation damage.
  • the opening in the pressure passage of the last compressor stage if any, at a distance from the end face of the impeller which corresponds approximately to a thickness of the impeller in the region of the pressure passage or somewhat less. If the opening on the impeller end face is too tight, disturbing flow noises will appear. If the opening is too far from the end face, part of the cavitation and erosion-inhibiting effect will be lost.
  • a preferred location for opening the opening in the pressure passage of the last compressor stage, if applicable, is the radially outer limitation of the pressure passage of the control disk. From here, si.ch allows the opening to pass through the control disk to the outside in a particularly simple form and from there via an external connection to a room in which the final pressure of the compressor prevails.
  • a further preferred embodiment of the invention is the arrangement of the opening in the pressure passage of the optionally last compressor stage gf g in this area in.
  • Existing slope of the running about straight or also bent radial pressure passage limitation On the one hand, with this arrangement, the opening comes very close to the start of the pressure passage and, on the other hand, the distance to the end face of the impeller can be precisely determined by the corresponding position of the opening.
  • a particularly simple embodiment of the invention is to be seen in the fact that the opening in the pressure passage of the last compressor stage, if any, is designed as a simple bore. As is easy to see, this poses the least difficulties in terms of production technology.
  • control disk 4 there is the pressure passage 5 which connects the impeller cells to the pressure chamber 6, which is delimited by the pressure housing 7.
  • the shaft passage to the outside is sealed by a packing 8.
  • the opening 9 is arranged in the control disk 4 at a distance a from the end face of the impeller, this distance corresponding approximately to an impeller width in the pressure passage area or less.
  • FIGS. III to V show partial sections of a compressor in which the suction and pressure ports are arranged on one side of the compressor.
  • the impeller 2 is fastened again on the shaft 1 and the pump delivery space is limited once by the housing 3 and the impeller end face by the control disk 4.
  • the compressor housing 7 contains both the suction port 13 and the pressure port 10 of the compressor and is through the rib 12 in the Suction chamber 14 and the pressure chamber 6 divided ..
  • the suction passage 11 Through the suction passage 11, the gas flows into the impeller cells and leaves them again through the pressure passage 5.
  • the beginning of the pressure passage 5 is designed as a slope 14 and the opening 9 according to the invention opens here , which is guided through a corresponding housing cam 15 to the outside.
  • a check valve can then be arranged in the bore 9 or also in the connecting line adjoining it, which is not shown, which prevents the escape of liquid from the pump cells to the outside when the pump is pumping in operating areas with larger mass flows.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP85112413A 1984-10-01 1985-10-01 Compresseur à anneau liquide Expired EP0179311B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85112413T ATE39549T1 (de) 1984-10-01 1985-10-01 Fluessigkeitsring-verdichter.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3436022 1984-10-01
DE19843436022 DE3436022A1 (de) 1984-10-01 1984-10-01 Fluessigkeitsring-verdichter

Publications (2)

Publication Number Publication Date
EP0179311A1 true EP0179311A1 (fr) 1986-04-30
EP0179311B1 EP0179311B1 (fr) 1988-12-28

Family

ID=6246841

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112413A Expired EP0179311B1 (fr) 1984-10-01 1985-10-01 Compresseur à anneau liquide

Country Status (6)

Country Link
US (1) US4634348A (fr)
EP (1) EP0179311B1 (fr)
AT (1) ATE39549T1 (fr)
DE (2) DE3436022A1 (fr)
HK (1) HK2790A (fr)
SG (1) SG37489G (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB8620546D0 (en) * 1986-08-23 1986-10-01 Genevac Ltd Vacuum pump
DE4343551A1 (de) * 1993-12-20 1995-06-22 Siemens Ag Flüssigkeitsringvakuumpumpe
DE19932632A1 (de) * 1999-07-13 2001-02-01 Siemens Ag Zweistufige Flüssigkeitsringmaschine
DE10008811C2 (de) * 2000-02-25 2003-05-28 Siemens Ag Flüssigkeitsringpumpe
DE102012000980A1 (de) * 2012-01-20 2013-07-25 Ecotecfuel Llc Verfahren und Vorrichtung zur mechanischen Aufheizung eines Stoffgemisches
US11512700B2 (en) * 2015-01-08 2022-11-29 Gardner Denver Nash Llc Low pressure sealing liquid entry area in a compressor type liquid ring pump
CN107532596B (zh) * 2015-02-12 2019-09-06 佶缔纳士机械有限公司 具有防气蚀结构的液环泵端口构件

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB832264A (en) * 1957-05-06 1960-04-06 N G N Electrical Ltd Improvements in or relating to vacuum pumping apparatus
DE1098150B (de) * 1958-05-30 1961-01-26 Heraeus Gmbh W C Vakuumpumpe mit Gasballasteinrichtung
DE2401177A1 (de) * 1974-01-11 1975-07-24 Pfeiffer Vakuumtechnik Vorrichtung zur geraeuschdaempfung bei drehschieberpumpen
DE3207507A1 (de) * 1982-03-02 1983-09-08 Siemens AG, 1000 Berlin und 8000 München Fluessigkeitsringverdichter

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1180613A (en) * 1913-03-19 1916-04-25 Siemens Schuckertwerke Gmbh Rotary pump.
DE1503605B2 (de) * 1965-04-28 1971-05-27 Siemens AG, 1000 Berlin u 8000 München Rueckschlagventil fuer eine fluessigkeitsringgaspumpe
US4083658A (en) * 1976-09-08 1978-04-11 Siemens Aktiengesellschaft Liquid ring compressor including a calibrated gas input opening
US4254305A (en) * 1979-02-07 1981-03-03 International Telephone And Telegraph Corporation Current limited subscriber line feed circuit
GB2064002A (en) * 1979-11-22 1981-06-10 Graham Precision Pumps Ltd Liquid Ring Vacuum Pumps
DE3337837A1 (de) * 1983-10-18 1985-04-25 Siemens AG, 1000 Berlin und 8000 München Fluessigkeitsringpumpe

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB832264A (en) * 1957-05-06 1960-04-06 N G N Electrical Ltd Improvements in or relating to vacuum pumping apparatus
DE1098150B (de) * 1958-05-30 1961-01-26 Heraeus Gmbh W C Vakuumpumpe mit Gasballasteinrichtung
DE2401177A1 (de) * 1974-01-11 1975-07-24 Pfeiffer Vakuumtechnik Vorrichtung zur geraeuschdaempfung bei drehschieberpumpen
DE3207507A1 (de) * 1982-03-02 1983-09-08 Siemens AG, 1000 Berlin und 8000 München Fluessigkeitsringverdichter

Also Published As

Publication number Publication date
SG37489G (en) 1990-01-26
ATE39549T1 (de) 1989-01-15
US4634348A (en) 1987-01-06
DE3436022A1 (de) 1986-04-03
DE3567066D1 (en) 1989-02-02
HK2790A (en) 1990-01-19
EP0179311B1 (fr) 1988-12-28

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