SE455117B - SCREW COMPRESSOR - Google Patents
SCREW COMPRESSORInfo
- Publication number
- SE455117B SE455117B SE8603528A SE8603528A SE455117B SE 455117 B SE455117 B SE 455117B SE 8603528 A SE8603528 A SE 8603528A SE 8603528 A SE8603528 A SE 8603528A SE 455117 B SE455117 B SE 455117B
- Authority
- SE
- Sweden
- Prior art keywords
- shaft
- screw compressor
- pressure side
- rotors
- compressor according
- Prior art date
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
Description
455117 Föreliggande uppfinning har till ändamål att förenkla en komp- ressor av angivet slag genom att eliminera behovet av axeltät- ningar vid kompressorns högtryckssida. The object of the present invention is to simplify a compressor of the type indicated by eliminating the need for shaft seals at the high-pressure side of the compressor.
Detta ändamål uppnås enligt uppfinningen genom att kompressorn uppvisar de i krav 1 angivna särdragen.This object is achieved according to the invention in that the compressor has the features stated in claim 1.
Fördelaktiga utföringsformer av uppfinningen är angivna i ef- terföljande patentkrav.Advantageous embodiments of the invention are set out in the appended claims.
Uppfinningen tydliggöres närmare i efterföljande exempel, som àskådíiggöres i bifogade figurer av vilka Figur 1 visar ett axiellt snitt genom kompressorns högtrycks- ände, och Figur 2 visar ett snitt utefter linjen 2-2 i fig. 1 under utc- lämnande av för uppfinningen ovasentliga detaljer.The invention is further elucidated in the following examples, which are illustrated in the accompanying figures, of which Figure 1 shows an axial section through the high pressure end of the compressor, and Figure 2 shows a section along the line 2-2 in Fig. 1 while disclosing details irrelevant to the invention. .
I fig. 1 visas kompressorns 1 utloppsände. Kompressorn är för- sedd med en hanrotor 2 med fem spar och en honrotor 3 med sex spår. Rotorerna är på högtryckssidan försedda med var sin axeltapp 4 respektive 5 lagrade i respektive nàllager 6 ooh 7.Fig. 1 shows the outlet end of the compressor 1. The compressor is equipped with a male rotor 2 with five grooves and a female rotor 3 with six grooves. The rotors are on the high-pressure side provided with respective shaft journals 4 and 5, respectively, mounted in respective needle bearings 6 and 7, respectively.
Mellan rotorernas ändytor 8 respektive 9 och gavelväggen 10 bildas en spalt d.A gap d is formed between the end surfaces 8 and 9 of the rotors and the end wall 10.
Spalten d utgör, vilket inledningsvis beskrivits, en läckagevàg för komprimerat medium, som den vägen när axeltapparna 4 re- spektive 5 och vidare ut till lagringarna.The gap d constitutes, as initially described, a leakage path for compressed medium, which is the path when the shaft pins 4 and 5 extend outwards to the bearings.
Såsom framgår av fig. 2 är rotorerna utförda med förhållandevis grunda spàr och förhållandevis klena axeltappar. Därigenom àstadkommes att avståndet lm respektive lf mellan en spàrbotten och respektive axeltapp blir langt. Med grunt spår avses här ett spàrdjup som motsvarar ca. 1/6-1/5 av respektive rotordia- meter, och med klen axel avses en axeldiameter i storleksord- ningen 1/4 av rotordiametern. Läckagespaltens längd lm respek- tive lf utgör då ca. 15-20 % av respektive rotors ytterdiame- telï. v! 455117 Längden mellan en sparbotten och axeltappen är tillräcklig för att spalten mellan rotorändarna och gavelväggen åstadkommer en spalttätningsverkan som avsevärt reducerar läckaget. Tillfreds- ställande tätning uppnås med enbart denna spalttätninq så att behovet av en speciell axeltätning för respektive axeltapp eli- mineras.As can be seen from Fig. 2, the rotors are made with relatively shallow grooves and relatively small shaft journals. This ensures that the distance lm and lf, respectively, between a track bottom and the respective shaft journal becomes long. By shallow track is meant here a groove depth that corresponds to approx. 1 / 6-1 / 5 of the respective rotor diameter, and by small shaft is meant a shaft diameter in the order of 1/4 of the rotor diameter. The length of the leakage gap lm and lf, respectively, then amounts to approx. 15-20% of the outer diameter of each rotor. v! The length between a spar bottom and the shaft journal is sufficient for the gap between the rotor ends and the end wall to provide a gap sealing effect which considerably reduces the leakage. Satisfactory sealing is achieved with only this gap seal so that the need for a special shaft seal for each shaft pin is eliminated.
I det visade exemplet är gängkombinationen 5+6'va1d eftersom rotorer med många gängor är gynnsamma för uppnàende av grunt spárdjup. Således är även gängkombinationer 5+7 och högre spe- ciellt lämpade för en kompressor enligt uppfinningen.In the example shown, the thread combination is 5 + 6 'va1d because rotors with many threads are favorable for achieving shallow groove depth. Thus, even thread combinations 5 + 7 and higher are especially suitable for a compressor according to the invention.
I Spalttätningen blir effektivare ju mindre spaltbredden d mellan rotorernas ändytor 8, 9 och gavelväggen 10 är. För att kunna ha ett så litet spel som möjligt är tapparna 4, 5 lagrade omedel- -bart intill gavelvàggen 10. Däriogenom motverkas den ökande risken för snedstallning av rotorernas ändytor som den klena axeltappen medför, och spaltbredden kan bibehàllas liten.In the gap seal, the smaller the gap width d between the end surfaces 8, 9 of the rotors and the end wall 10 is more effective. In order to have as little play as possible, the pins 4, 5 are stored immediately next to the end wall 10. This counteracts the increasing risk of skew of the end surfaces of the rotors caused by the small shaft pin, and the gap width can be maintained small.
Lagren 6, 7 är utförda som nàllager så att de tar minsta möjli- ga radiella utrymme i anspråk. Pâ det sättet kan öppningarna i gaveln för axeltapparna göras små vilket bidrar till uppnàendet av en lång spaltlàngd lm reespektive lf. 'The bearings 6, 7 are designed as needle bearings so that they take up the least possible radial space. In this way, the openings in the end of the shaft journals can be made small, which contributes to the achievement of a long gap length lm respectively lf. '
Claims (1)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8603528A SE455117B (en) | 1986-08-20 | 1986-08-20 | SCREW COMPRESSOR |
JP62505058A JPH02500676A (en) | 1986-08-20 | 1987-08-19 | screw compressor |
PCT/SE1987/000363 WO1988001351A1 (en) | 1986-08-20 | 1987-08-19 | Rotary screw compressor |
KR1019880700426A KR880701835A (en) | 1986-08-20 | 1988-04-20 | Rotary screw compressor |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE8603528A SE455117B (en) | 1986-08-20 | 1986-08-20 | SCREW COMPRESSOR |
Publications (3)
Publication Number | Publication Date |
---|---|
SE8603528D0 SE8603528D0 (en) | 1986-08-21 |
SE8603528L SE8603528L (en) | 1988-02-21 |
SE455117B true SE455117B (en) | 1988-06-20 |
Family
ID=20365365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE8603528A SE455117B (en) | 1986-08-20 | 1986-08-20 | SCREW COMPRESSOR |
Country Status (4)
Country | Link |
---|---|
JP (1) | JPH02500676A (en) |
KR (1) | KR880701835A (en) |
SE (1) | SE455117B (en) |
WO (1) | WO1988001351A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB8702390D0 (en) * | 1987-02-03 | 1987-03-11 | Warwick University Of | Identifying/measuring odorants |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1361604A (en) * | 1970-07-09 | 1974-07-30 | Svenska Rotor Maskiner Ab | Meshing screw rotor positive-displacement machines |
GB1518271A (en) * | 1974-07-01 | 1978-07-19 | Svenska Rotor Maskiner Ab | Method for the compression ratio of a screw compressor and prime mover |
-
1986
- 1986-08-20 SE SE8603528A patent/SE455117B/en not_active IP Right Cessation
-
1987
- 1987-08-19 JP JP62505058A patent/JPH02500676A/en active Pending
- 1987-08-19 WO PCT/SE1987/000363 patent/WO1988001351A1/en unknown
-
1988
- 1988-04-20 KR KR1019880700426A patent/KR880701835A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
SE8603528L (en) | 1988-02-21 |
KR880701835A (en) | 1988-11-05 |
SE8603528D0 (en) | 1986-08-21 |
JPH02500676A (en) | 1990-03-08 |
WO1988001351A1 (en) | 1988-02-25 |
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