WO1996034204A1 - Compresseur a vis avec protection des coups de liquide - Google Patents
Compresseur a vis avec protection des coups de liquide Download PDFInfo
- Publication number
- WO1996034204A1 WO1996034204A1 PCT/FR1996/000603 FR9600603W WO9634204A1 WO 1996034204 A1 WO1996034204 A1 WO 1996034204A1 FR 9600603 W FR9600603 W FR 9600603W WO 9634204 A1 WO9634204 A1 WO 9634204A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- pinion
- high pressure
- teeth
- thread
- compressor
- 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
- F04C18/48—Rotary-piston pumps with non-parallel axes of movement of co-operating members
- F04C18/50—Rotary-piston pumps with non-parallel axes of movement of co-operating members the axes being arranged at an angle of 90 degrees
- F04C18/52—Rotary-piston pumps with non-parallel axes of movement of co-operating members the axes being arranged at an angle of 90 degrees of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
-
- 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
- F04C29/0021—Systems for the equilibration of forces acting on the pump
- F04C29/0035—Equalization of pressure pulses
Definitions
- the present invention relates to a rotary positive displacement compressor of the screw and pinion type.
- the present invention relates to a compressor for bringing a gas from a low pressure to a high pressure, comprising a screw provided with at least one thread, rotating in a casing and cooperating with at least one pinion carrying teeth engaging in and meshing with the thread, defining with the casing a volume for increasing the fluid pressure therein, one face of the teeth being exposed to the high pressure fluid, the other being exposed to the low pressure fluid, the pinion consisting of a plastic blade in which the teeth are formed, sealingly meshing with the net and disposed on the high pressure side of the pinion, supported by a metal support on the low pressure side, the high pressure face of the plastic blade of the pinion being almost tight contact with a lip of the casing, pushing means for exerting a pressing force the pinion shaft against stop devices, the bearing force created by said means being greater than the maximum force exerted on the pinion during normal operation of the compressor.
- This arrangement produces the remarkable effect of substantially reducing the damage suffered by the compressor during what is commonly referred to as a liquid blow, without any deterioration of the profile of the plastic teeth or of the characteristics of the compressor.
- the compressor may have to compress liquid instead of gas during a very short period, generally less than a second. , and this creates what is generally referred to as a liquid blow.
- the pressures created are then several times higher than the pressures for which the compressor is designed, generally 10 to 20 times.
- the pressure in the thread creates an axial force on the pinion which largely exceeds that exerted by the support thrust means and the pinion will move axially, thus opening a space between the high pressure face of the teeth and the housing lip, allowing excess liquid in the thread to escape through said space and thus to maintain the pressure in the thread within acceptable limits.
- Figure 1 is a partial section along line I - I of Figure 2, of a preferred embodiment of a machine according to the invention, in the axis of one of its pinions perpendicular to the axis of the screw.
- Figure 2 is a schematic half-section of the machine along line II - II of Figure 1.
- Figure 3 is a partial section, as in Figure
- a screw 1, rotating around an axis 2 comprises a substantially helical thread la (Fig 2) which meshes with teeth 3 of the pinion 4.
- the two are mounted in a casing 5 pierced with a bore 6 whose proximity to the top lb of the threads which separates the hollows from the successive threads provides a quasi-tightness. Due to 1'en meshement between the screw l and the pinion 4, the rotation of the screw causes a corresponding rotation of the pinion.
- the pinion is made in a known manner from a plastic blade 7 supported by a metal support 8, the latter itself carrying two bearings 9 and 10 which hold the pinion 4 on a shaft while allowing it to rotate.
- the shaft 11 has its axis determined by a bore 12 in the housing and a bore 13 formed in a support 14, itself centered in a bore 15 of the housing.
- the fluid to be compressed exerts the high pressure in the direction of the arrow 16, thus causing the pinion to bear on the bearing 9.
- thrust means such as the spring washers 17 push the shaft 11 towards the stop 18, itself held in position by the cover 19 fixed to the casing.
- the length of the stopper 18 is fixed so that after assembly, the clearance 20 between the lip 21 of the casing and the pressure face 22 of the plastic tooth is kept at a minimum value, generally a few tens of microns.
- the spring washers 17 are calculated so that after assembly, the thrust they exert exceeds the axial load created by the high pressure acting according to the arrow 16. They are typically chosen so that their force represents 150 to 200% of the maximum thrust experienced by the pinion when the compressor operates under the extreme pressures for which it is designed.
- the operation of the system is as follows: If at a given time, generally at start-up, appreciable volumes of liquid are absorbed by the compressor, the pressure in the thread suddenly increases to reach values much higher than the maximum service values; for example, in air conditioning compressors designed to rise to pressures of 24,000 or 28,000 hPa, the peak pressure can reach 200,000 or 300,000 hPa.
- the spring washers push back the shaft 11 against the stop 18 and reduce the clearance 20 to its normal values of a few tens of microns.
- the thickness of the spring washers is generally chosen to limit the axial displacement of the pinion to values depending on the plastic and its dimensions, in particular its thickness; as indicated above, the axial displacement of the pinion seems to reduce the width of the thread seen by the pinion and excessive displacement could lead to permanent damage; but displacements of the order of 0.5 and even 1 mm have been found to be accepted by the plastic teeth without damage.
- the pinion tooth does not undergo any permanent wear and the characteristics of the compressor remain unchanged.
- the invention has been described with a pinion rotating around a fixed shaft but could be applied to other arrangements, for example when the pinion shaft is integral with the pinion support and rotates with it, and the bearings holding the pinion are directly mounted in the housing.
- the pushing means 17a would push the bearing against the flange 18a secured to the support 14a by nuts 22 as shown in FIG. 3.
- the invention would not be substantially modified if the spring washers 17 used to create the thrust holding the pinion shaft against the stopper 18 were replaced by other means of generating a thrust, such as a piston acting under gas pressure, e.g. high exhaust pressure, piston having a cross section sufficient for its thrust to be greater, in all cases except liquid blow, than the force applied to the teeth of the pinion by the gas in compression.
- a thrust such as a piston acting under gas pressure, e.g. high exhaust pressure, piston having a cross section sufficient for its thrust to be greater, in all cases except liquid blow, than the force applied to the teeth of the pinion by the gas in compression.
- the invention would also apply if the stop means against which the pinion is pushed by the pushing means were located, not in the casing on the high pressure side of the pinion, but in another location.
- the invention applies to the case where the stop means are located on the low pressure side of the axis 11.
- Such means could be a pin extended perpendicularly through the shaft 11 in the region of the bore and in an oblong hole made in the support 14.
- the clearance 20 is at the desired value of a few tens of microns.
- the clearance 20 reaches the value of 0.5 mm, or even 1 mm.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/945,085 US5890884A (en) | 1995-04-28 | 1996-04-19 | Screw-type compressor with liquid lock protection |
EP96915063A EP0823025B1 (fr) | 1995-04-28 | 1996-04-19 | Compresseur a vis avec protection des coups de liquide |
DE69603076T DE69603076T2 (de) | 1995-04-28 | 1996-04-19 | Schraubenverdichter mit schutz gegen flüssigkeitsstösse |
JP8532213A JPH11504096A (ja) | 1995-04-28 | 1996-04-19 | 液体ロック解放機能を備えたスクリュー圧縮機 |
AU56965/96A AU5696596A (en) | 1995-04-28 | 1996-04-19 | Screw-type compressor with water hammer protection |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR95/05108 | 1995-04-28 | ||
FR9505108A FR2733549A1 (fr) | 1995-04-28 | 1995-04-28 | Compresseur a vis avec protection des coups de liquide |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1996034204A1 true WO1996034204A1 (fr) | 1996-10-31 |
Family
ID=9478531
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1996/000603 WO1996034204A1 (fr) | 1995-04-28 | 1996-04-19 | Compresseur a vis avec protection des coups de liquide |
Country Status (8)
Country | Link |
---|---|
US (1) | US5890884A (fr) |
EP (1) | EP0823025B1 (fr) |
JP (1) | JPH11504096A (fr) |
CN (1) | CN1091848C (fr) |
AU (1) | AU5696596A (fr) |
DE (1) | DE69603076T2 (fr) |
FR (1) | FR2733549A1 (fr) |
WO (1) | WO1996034204A1 (fr) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2009174520A (ja) * | 2007-12-26 | 2009-08-06 | Daikin Ind Ltd | ゲートロータおよびスクリュー圧縮機 |
WO2009084233A1 (fr) * | 2007-12-28 | 2009-07-09 | Daikin Industries, Ltd. | Compresseur à vis |
WO2018174100A1 (fr) * | 2017-03-21 | 2018-09-27 | ダイキン工業株式会社 | Compresseur à vis unique |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1496275A (fr) * | 1966-10-07 | 1967-09-29 | Goodyear Pumps Ltd | Pompe rotative à vis sans fin et roue à disque |
FR1586832A (fr) * | 1968-02-08 | 1970-03-06 | ||
FR2148677A5 (fr) * | 1971-07-30 | 1973-03-23 | Zimmern Bernard | |
FR2267462A1 (fr) * | 1974-04-15 | 1975-11-07 | Hokuetsu Kogyo Co |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2624215B1 (fr) * | 1987-12-03 | 1990-05-11 | Zimmern Bernard | Pignons flottants pour machine a vis haute pression |
US5080568A (en) * | 1990-09-20 | 1992-01-14 | Bernard Zimmern | Positive displacement rotary machine |
-
1995
- 1995-04-28 FR FR9505108A patent/FR2733549A1/fr active Pending
-
1996
- 1996-04-19 EP EP96915063A patent/EP0823025B1/fr not_active Expired - Lifetime
- 1996-04-19 CN CN96193541A patent/CN1091848C/zh not_active Expired - Fee Related
- 1996-04-19 AU AU56965/96A patent/AU5696596A/en not_active Abandoned
- 1996-04-19 WO PCT/FR1996/000603 patent/WO1996034204A1/fr active IP Right Grant
- 1996-04-19 JP JP8532213A patent/JPH11504096A/ja active Pending
- 1996-04-19 US US08/945,085 patent/US5890884A/en not_active Expired - Fee Related
- 1996-04-19 DE DE69603076T patent/DE69603076T2/de not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1496275A (fr) * | 1966-10-07 | 1967-09-29 | Goodyear Pumps Ltd | Pompe rotative à vis sans fin et roue à disque |
FR1586832A (fr) * | 1968-02-08 | 1970-03-06 | ||
FR2148677A5 (fr) * | 1971-07-30 | 1973-03-23 | Zimmern Bernard | |
FR2267462A1 (fr) * | 1974-04-15 | 1975-11-07 | Hokuetsu Kogyo Co |
Also Published As
Publication number | Publication date |
---|---|
FR2733549A1 (fr) | 1996-10-31 |
CN1091848C (zh) | 2002-10-02 |
DE69603076T2 (de) | 2000-01-27 |
CN1183136A (zh) | 1998-05-27 |
AU5696596A (en) | 1996-11-18 |
US5890884A (en) | 1999-04-06 |
DE69603076D1 (de) | 1999-08-05 |
JPH11504096A (ja) | 1999-04-06 |
EP0823025A1 (fr) | 1998-02-11 |
EP0823025B1 (fr) | 1999-06-30 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2509489C (fr) | Turbomachine avec moyens de retenue axiale du rotor | |
EP1561907B1 (fr) | Turboréacteur à soufflante solidaire d'un arbre d'entraînement supporté par un premier et un deuxième paliers | |
FR2589955A1 (fr) | Dispositif d'etancheite de turbopompe | |
EP1167788A1 (fr) | Dispositif d'étanchéité d'un "squeeze film" intégré dans un palier à roulement | |
FR2619868A1 (fr) | Systeme d'aubes de compresseurs pour turbine a gaz | |
EP0291407A1 (fr) | Aube mobile de soufflante comportant une dépouille en extrémité | |
CA2608267C (fr) | Dispositif de limitation de survitesse de turbine dans une turbomachine | |
EP0374003A1 (fr) | Turbomachine comportant un dispositif de freinage entre rotor de turbine et carter d'échappement | |
FR2888876A1 (fr) | Dispositif d'amortissement des vibrations d'un rotor dans une turbomachine | |
FR2526114A1 (fr) | Unite d'etancheite et de guidage pour pistons en general | |
EP0928881B1 (fr) | Turbomachine a freinage mutuel d'arbres concentriques en cas de rupture | |
EP0823025B1 (fr) | Compresseur a vis avec protection des coups de liquide | |
FR2733550A1 (fr) | Compresseur a vis avec protection des coups de liquide | |
CA2494770C (fr) | Levier de commande du calage angulaire d'une aube dans une turbomachine | |
EP0504051B1 (fr) | Coupleur hydrocinétique à remplissage fixe et chambres de retardement principale et auxiliaire | |
EP1262696B1 (fr) | Dispositif de joint d'étanchéité destiné à un palier de turbomachine | |
FR2611000A1 (fr) | Pignon flottant avec ressort pour machine volumetrique | |
FR2888877A1 (fr) | Dispositif d'amortissement des vibrations d'un rotor | |
FR2852462A1 (fr) | Turbomachine incorporant une machine electrique, et comportant des paliers isoles thermiquement | |
FR3000990A1 (fr) | Dispositif d'etancheite inter-arbre coaxiaux d'une turbomachine | |
FR3092140A1 (fr) | Turbomachine améliorée comprenant un système inertiel. | |
WO2006064096A1 (fr) | Axe de piston | |
EP3068979A1 (fr) | Element annulaire de carter de turbomachine | |
FR3111157A1 (fr) | Moteur comprenant un organe d’étanchéité entre deux éléments de rotor | |
FR2638501A1 (fr) | Joint d'etancheite de bout d'arbre |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 96193541.3 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AU CN JP US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LU MC NL PT SE |
|
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1996915063 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 08945085 Country of ref document: US |
|
ENP | Entry into the national phase |
Ref document number: 1996 532213 Country of ref document: JP Kind code of ref document: A |
|
WWP | Wipo information: published in national office |
Ref document number: 1996915063 Country of ref document: EP |
|
WWG | Wipo information: grant in national office |
Ref document number: 1996915063 Country of ref document: EP |