SE427954B - EJECTOR - Google Patents
EJECTORInfo
- Publication number
- SE427954B SE427954B SE7905309A SE7905309A SE427954B SE 427954 B SE427954 B SE 427954B SE 7905309 A SE7905309 A SE 7905309A SE 7905309 A SE7905309 A SE 7905309A SE 427954 B SE427954 B SE 427954B
- Authority
- SE
- Sweden
- Prior art keywords
- nozzle
- nozzles
- ejector
- pressure
- outlet
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/14—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid
- F04F5/16—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids
- F04F5/20—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating
- F04F5/22—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being elastic fluid displacing elastic fluids for evacuating of multi-stage type
Description
7905309-6 storlek tilltar från det första munstycket 7. 7905309-6 size increases from the first nozzle 7.
I mellanväggarna 14 och 15 finns genomgående öppningar, vilka är tillslutna med hjälp av enkla klaffventiler 18, 19.In the partitions 14 and 15 there are through-openings, which are closed by means of simple flap valves 18, 19.
Dessa klaffventiler fungerar så, att när trycket i kammaren 3 blir högre än trycket i kammaren 4 klaffventilen 18 öppnar och när trycket i kammaren 4 blir högre än i kammaren 5 så öppnar klaffventilen 19.These flap valves function in such a way that when the pressure in the chamber 3 becomes higher than the pressure in the chamber 4, the flap valve 18 opens and when the pressure in the chamber 4 becomes higher than in the chamber 5, the flap valve 19 opens.
I mellanväggen 16 finns också en öppning men denna är i den visade utföringsformen tillstängd med en plugg 20. Denna plugg kan utbytas mot en klaffventil om man önskar öka multi- ejektorns kapacitet. Detta innebär dock också att ett ytter- ligare munstycke måste monteras i den öppning i ändväggen, som .i den visade utföringsformen är tillstängd med en plugg 21, och utloppet 22 då också vara igenpluggat.There is also an opening in the partition wall 16, but in the embodiment shown this is closed with a plug 20. This plug can be replaced by a flap valve if it is desired to increase the capacity of the multi-ejector. However, this also means that an additional nozzle must be mounted in the opening in the end wall, which in the embodiment shown is closed with a plug 21, and the outlet 22 will then also be plugged.
Den så långt beskrivna multiejektorn är känd och med hjälp av denna kan man åstadkomma undertryck uppgående till omkring 50% av befintligt lufttryck. Det har emellertid visat sig att man genonnmycketsmå ändringar av förhållandena mellan munstycke- nas inlopps- ochutloppsdiametrar och avstånden mellan munstyckena lyckats åstadkomma undertryck svarande mot endast 7% av befint- ligt lufttryck.The multi-ejector described so far is known and with the aid of this it is possible to achieve a negative pressure amounting to about 50% of the existing air pressure. However, it has been found that very small changes in the conditions between the inlet and outlet diameters of the nozzles and the distances between the nozzles have been achieved to create a negative pressure corresponding to only 7% of the existing air pressure.
Eftersom ejektorer av det slag som denna uppfinning gäl- ler är kända sedan gammalt och kommit till allmän användning i många tillämpningar har den allmänna uppfattningen varit att de fått sin slutgiltiga form. Föreliggande uppfinning visar dock att mycket väsentliga förbättringar kan erhållas med mycket små medel.Since ejectors of the type to which this invention pertains have been known since ancient times and have come into general use in many applications, the general opinion has been that they have taken their final form. However, the present invention shows that very significant improvements can be obtained with very small means.
Vid ett praktiskt försök där nedanstående samband mellan munstyckenas inlopps- och utloppsdiametrar och avstånd till efterföljande munstycken kommit till utförande erhöll man vid användande av ett övertryck mellan 3,7 och 6,0 kp/cmz ett under- tryck svarande mot 7% av det befintliga lufttrycket.In a practical experiment in which the following relationship between the inlet and outlet diameters of the nozzles and the distance to the subsequent nozzles was carried out, a negative pressure corresponding to 7% of the existing pressure was obtained using an overpressure between 3.7 and 6.0 kp / cm the air pressure.
Munstycke Inloppsdiam. Utloppsdiam. Avstånd till efterfölj. " munstycke Första (7) a - 1,5a Oa Andra (s) 2,17a. 2,3sa ä 'sa Tredje (9) š,67a Ü 4.08a 2,5a Fjärde (10) 4,58a 5,69a 7905309-6 Vid de ovan givna värdena erhöll man sålunda ett resul- tat, som var maximalt. Emellertid har små variationer av dia- metrarna från de ovan nämnda visat sig påverka undertrycket mycket ringa, vilket däremot större avvikelser gjort. Sålunda har undertryck svarande mot mellan 7 och 10% av det befintliga lufttrycket erhållits när diametrarna legat inom nedan angivna värden med bibehållande av avstånden mellan munstyckena enligt ovan.Nozzle Inlet Diameter. Outlet diameter. Distance to follow. "nozzle First (7) a - 1,5a Oa Second (s) 2,17a. 2,3sa ä 'sa Third (9) š, 67a Ü 4.08a 2,5a Fourth (10) 4,58a 5,69a 7905309 At the values given above, a result was thus obtained which was maximum. However, small variations in the diameters from the above have been found to have a very small effect on the negative pressure, which on the other hand has made larger deviations. 7 and 10% of the existing air pressure was obtained when the diameters were within the values given below while maintaining the distances between the nozzles as above.
Munstycke Inloppsdiam. Utloppsdiam. Avstånd till efterfölj. munstyoke Första (7) a 1,5a Oa Andra (8) 2,1-2,2a 2,3-2,4a 5a Tredje (9) 3,6-3,7a 4.0-4,1a 2,5a Fjärde (10) 4,5~4,6a 5,6-5,7a Genom föreliggande uppfinning har man sålunda uppnått en väsentlig förbättring av den undertrycksalstrande förmågan hos kända multiejektorer genom åtgärder som icke alls kunnat För- väntas ge någon nämndvärd resultatförbättring.Nozzle Inlet Diameter. Outlet diameter. Distance to follow. munstyoke First (7) a 1.5a Oa Second (8) 2.1-2.2a 2.3-2.4a 5a Third (9) 3.6-3.7a 4.0-4.1a 2.5a Fourth ( 10) 4.5 ~ 4.6a 5.6-5.7a The present invention has thus achieved a significant improvement in the negative pressure generating ability of known multi-ejectors by means of measures which could not at all be expected to give any appreciable improvement in results.
Det är emellertid klart att vid färre antal munstycken än fyra erhålles motsvarande förbättring i jämförelse med tidigare kända ejektorer med motsvarande antal munstycken.It is clear, however, that with fewer than four nozzles, a corresponding improvement is obtained in comparison with previously known ejectors with a corresponding number of nozzles.
Claims (1)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7905309A SE427954B (en) | 1979-06-15 | 1979-06-15 | EJECTOR |
DE803049647T DE3049647T1 (en) | 1979-06-15 | 1980-06-12 | EJECTOR |
AU60504/80A AU549039B2 (en) | 1979-06-15 | 1980-06-12 | Ejector |
GB8104652A GB2066900B (en) | 1979-06-15 | 1980-06-12 | Ejector |
PCT/SE1980/000168 WO1980002863A1 (en) | 1979-06-15 | 1980-06-12 | Ejector |
JP50133980A JPS56500814A (en) | 1979-06-15 | 1980-06-12 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7905309A SE427954B (en) | 1979-06-15 | 1979-06-15 | EJECTOR |
Publications (2)
Publication Number | Publication Date |
---|---|
SE7905309L SE7905309L (en) | 1980-12-16 |
SE427954B true SE427954B (en) | 1983-05-24 |
Family
ID=20338304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SE7905309A SE427954B (en) | 1979-06-15 | 1979-06-15 | EJECTOR |
Country Status (6)
Country | Link |
---|---|
JP (1) | JPS56500814A (en) |
AU (1) | AU549039B2 (en) |
DE (1) | DE3049647T1 (en) |
GB (1) | GB2066900B (en) |
SE (1) | SE427954B (en) |
WO (1) | WO1980002863A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3025525A1 (en) * | 1980-07-05 | 1982-01-28 | Jürgen 4477 Welver Volkmann | EJECTOR DEVICE |
DE3431240A1 (en) * | 1984-08-24 | 1986-03-06 | Michael 4150 Krefeld Laumen | REFRIGERATION MACHINE OR HEAT PUMP AND JET PUMP HERE |
SE466561B (en) * | 1988-06-08 | 1992-03-02 | Peter Tell | MULTIEJEKTORANORDNING |
GB9017791D0 (en) * | 1990-08-14 | 1990-09-26 | Portsmouth Tech Consult | Vacuum gripper devices |
IL100168A0 (en) * | 1991-11-27 | 1992-08-18 | Dan Greenberg | High vacuum pump |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1729794A (en) * | 1929-10-01 | Injector ptjmp | ||
FR361049A (en) * | 1905-11-27 | 1906-05-14 | Westinghouse Electric Corp | Advanced diffuser system for ejector |
DE321704C (en) * | 1916-06-10 | 1920-06-11 | British Westinghouse Electric | Jet apparatus for elastic equipment |
DE389520C (en) * | 1918-08-13 | 1924-02-11 | Kurt Hoefer Dr Ing | Jet machine |
DE561872C (en) * | 1929-08-22 | 1932-10-19 | Schmidt Paul | Conveying liquids at high pressure by means of liquid jet pumps |
US2078614A (en) * | 1935-02-05 | 1937-04-27 | G & J Weir Ltd | Multistage ejector |
SE370765B (en) * | 1973-12-05 | 1974-10-28 | Piab Ab | |
DE3025525A1 (en) * | 1980-07-05 | 1982-01-28 | Jürgen 4477 Welver Volkmann | EJECTOR DEVICE |
-
1979
- 1979-06-15 SE SE7905309A patent/SE427954B/en unknown
-
1980
- 1980-06-12 JP JP50133980A patent/JPS56500814A/ja active Pending
- 1980-06-12 GB GB8104652A patent/GB2066900B/en not_active Expired
- 1980-06-12 AU AU60504/80A patent/AU549039B2/en not_active Expired
- 1980-06-12 DE DE803049647T patent/DE3049647T1/en active Granted
- 1980-06-12 WO PCT/SE1980/000168 patent/WO1980002863A1/en active Application Filing
Also Published As
Publication number | Publication date |
---|---|
JPS56500814A (en) | 1981-06-18 |
DE3049647C2 (en) | 1991-08-01 |
WO1980002863A1 (en) | 1980-12-24 |
AU549039B2 (en) | 1986-01-09 |
GB2066900B (en) | 1983-04-20 |
DE3049647T1 (en) | 1982-02-25 |
GB2066900A (en) | 1981-07-15 |
SE7905309L (en) | 1980-12-16 |
AU6050480A (en) | 1981-01-05 |
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