WO1988001351A1 - Compresseur a vis tournante - Google Patents

Compresseur a vis tournante Download PDF

Info

Publication number
WO1988001351A1
WO1988001351A1 PCT/SE1987/000363 SE8700363W WO8801351A1 WO 1988001351 A1 WO1988001351 A1 WO 1988001351A1 SE 8700363 W SE8700363 W SE 8700363W WO 8801351 A1 WO8801351 A1 WO 8801351A1
Authority
WO
WIPO (PCT)
Prior art keywords
rotor
high pressure
screw compressor
rotary screw
shaft
Prior art date
Application number
PCT/SE1987/000363
Other languages
English (en)
Inventor
Arnold Englund
Original Assignee
Svenska Rotor Maskiner Ab
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 Svenska Rotor Maskiner Ab filed Critical Svenska Rotor Maskiner Ab
Publication of WO1988001351A1 publication Critical patent/WO1988001351A1/fr
Priority to KR1019880700426A priority Critical patent/KR880701835A/ko

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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/082—Details specially related to intermeshing engagement type pumps
    • F04C18/084—Toothed wheels
    • 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
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type

Definitions

  • the present invention relates to a rotary screw compressor comprising a male rotor and a female rotor having intermeshing, helically extending grooves.
  • the rotors of a compressor of this kind are provided with shaft journals for journalling the rotors.
  • Compressors of the specified kind are well-known. Representative examples thereof are disclosed in the Swedish published patent applications 374 946 and 418 889.
  • the object of the present invention is to simplify a compressor of the specified kind by eliminating the need for shaft sealings at the high pressure end of the compressor. According to the invention this has been achieved in that the compressor has the features specified in claim 1.
  • Figure 1 is a longitudinal section through the high pressure end of the compressor, and Figure 2 is a section taken along the lines 2-2 of figure 1, omitting details not essential to the invention.
  • FIG 1 the discharge end of the compressor is shown.
  • the compressor comprises a male rotor 2 having five grooves and a female rotor 3 having six grooves.
  • Each of the rotors is at the high pressure end provided with a shaft journal 4, 5 journalled in needle bearings 6, 7.
  • a clearance d is formed between the end surfaces 8, 9 of the rotors and the end wall.
  • the clearance d constitutes a leakage path for compressed working fluid, which therethrough reaches the shaft journals 4, 5 and further on the bearings.
  • the rotors are made with relatively shallow grooves and relatively slender shaft journals.
  • the distance 1 m and 1 f respectively, between the bottom of a groove and the related shaft journal will be long.
  • a shallow groove a groove depth of about 1/6 to 1/5 of the rotor diameter is ment, and by a slender shaft journal, a diameter thereof of about 1/4 of the rotor diameter is ment.
  • the length of the leakage path will then correspond to about 15 to 20 % of the related rotor diameter.
  • the length between the bottom of a groove and the shaft journal is sufficient to establish a closed clearance sealing effect through the clearance between the rotor end surfaces and the end wall, which considerably reduces the leakage. A satisfactional sealing is attained therethrough, which eliminates the need for a special shaft sealing for each of the shaft journals.
  • the lobe combination 5+6 is chosen, as rotors with many lobes are favourable for achieving a small groove depth. Therefore also lobe combinations of 5+7 and more are particularly suitable for a compressor according to the invention.
  • the sealing is more efficient the narrower the clearance d between the rotor end surfaces 8, 9 and the end wall 10 is.
  • the shaft journals 4, 5 are journalled immediately adjacent the end wall 10. Thereby the increasing risk for inclination of the rotor end surfaces caused by the slender shaft journal is counter-acted and the clearance can be kept narrow.
  • bearings 6, 7 needle-bearings are used so that the radial dimensions thereof are minimized. In this way the holes in the end wall for the shaft journals can be made small, which contributes to attain a long sealing clearance 1 m , 1 f , respectively.

Abstract

Un compresseur à vis tournante comprend un rotor mâle (2) et un rotor femelle (3) présentant des rainures s'engrenant mutuellement et s'étendant hélicoïdalement. Les extrémités des rotors sont pourvues de tourillons d'arbres servant à tourillonner les rotors. Afin d'éviter d'avoir recours à des joints d'étanchéité d'arbre autour des tourillons d'arbre (4, 5) au niveau de l'extrémité sous haute pression on conçoit les rotors de façon à produire un effet d'étanchéité entre les surfaces d'extrémité de rotors (8, 9) et la paroi d'extrémité sous haute pression (10), des rainures de rotors peu profondes et des tourillons d'arbre (4, 5) fusiformes rendant possible un tel effet.
PCT/SE1987/000363 1986-08-20 1987-08-19 Compresseur a vis tournante WO1988001351A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019880700426A KR880701835A (ko) 1986-08-20 1988-04-20 회전스크류 압축기

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8603528A SE455117B (sv) 1986-08-20 1986-08-20 Skruvkompressor
SE8603528-4 1986-08-20

Publications (1)

Publication Number Publication Date
WO1988001351A1 true WO1988001351A1 (fr) 1988-02-25

Family

ID=20365365

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE1987/000363 WO1988001351A1 (fr) 1986-08-20 1987-08-19 Compresseur a vis tournante

Country Status (4)

Country Link
JP (1) JPH02500676A (fr)
KR (1) KR880701835A (fr)
SE (1) SE455117B (fr)
WO (1) WO1988001351A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203249A (en) * 1987-02-03 1988-10-12 Univ Warwick Identifying or measuring components of a mixture

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE374946B (fr) * 1970-07-09 1975-03-24 Svenska Rotor Maskiner Ab
SE418889B (sv) * 1974-07-01 1981-06-29 Svenska Rotor Maskiner Ab Metod for modifiering av en kompressoranleggning for ett hogre kompressionsforhallande en det normala med praktiskt oforendrad effektforbrukning

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE374946B (fr) * 1970-07-09 1975-03-24 Svenska Rotor Maskiner Ab
SE418889B (sv) * 1974-07-01 1981-06-29 Svenska Rotor Maskiner Ab Metod for modifiering av en kompressoranleggning for ett hogre kompressionsforhallande en det normala med praktiskt oforendrad effektforbrukning

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2203249A (en) * 1987-02-03 1988-10-12 Univ Warwick Identifying or measuring components of a mixture

Also Published As

Publication number Publication date
SE8603528D0 (sv) 1986-08-21
SE8603528L (sv) 1988-02-21
JPH02500676A (ja) 1990-03-08
SE455117B (sv) 1988-06-20
KR880701835A (ko) 1988-11-05

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