EP2348217B1 - Souffleuse rotative à déplacement positif avec réduction du bruit et des pulsations - Google Patents

Souffleuse rotative à déplacement positif avec réduction du bruit et des pulsations Download PDF

Info

Publication number
EP2348217B1
EP2348217B1 EP11000544A EP11000544A EP2348217B1 EP 2348217 B1 EP2348217 B1 EP 2348217B1 EP 11000544 A EP11000544 A EP 11000544A EP 11000544 A EP11000544 A EP 11000544A EP 2348217 B1 EP2348217 B1 EP 2348217B1
Authority
EP
European Patent Office
Prior art keywords
blower
chamber
rotor
closed cell
discharge
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.)
Not-in-force
Application number
EP11000544A
Other languages
German (de)
English (en)
Other versions
EP2348217A3 (fr
EP2348217A2 (fr
Inventor
Erich R. Fitzpatrick
Michael R. Buis
Charles R. Jones Jr.
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.)
Tuthill Corp
Original Assignee
Tuthill Corp
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 Tuthill Corp filed Critical Tuthill Corp
Publication of EP2348217A2 publication Critical patent/EP2348217A2/fr
Publication of EP2348217A3 publication Critical patent/EP2348217A3/fr
Application granted granted Critical
Publication of EP2348217B1 publication Critical patent/EP2348217B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • F04C18/12—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
    • F04C18/126—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 radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
    • 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
    • F04C29/06—Silencing
    • F04C29/065—Noise dampening volumes, e.g. muffler chambers
    • 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
    • F04C29/06—Silencing
    • F04C29/068—Silencing the silencing means being arranged inside the pump housing
    • 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
    • F04C2240/00—Components
    • F04C2240/30—Casings or housings

Definitions

  • the invention relates to rotary positive displacement blowers (of the Roots type) and, more particularly, to a back-pass loop for gradually pressurizing the working cell to outlet pressure in order to weaken the strength of the pulsations that would otherwise happen without such a back-pass loop, and thereby reduce noise and shock (and perhaps better efficiency as well).
  • blowers are typically measured (or specified) in terms of the following factors:- flow, pressure, efficiency, noise, and reliability.
  • US5439358A discloses a positive displacement, re-circulating Roots-type rotary gas compressor which operates on the basis of flow work compression.
  • the compressor includes a pair of large diameter recirculation conduits which return compressed discharge gas to the compressor housing, where it is mixed with low pressure inlet gas, thereby minimizing adiabatic heating of the gas.
  • US5439358A further relates to positioning flow diverters between a zone of intermeshing and the inlet port, to reduce the generated acoustic noise.
  • blowers of this type can be built to all kinds of sizes (including very large). Hence design flow rate is an operating point that is scalable over a wide range.
  • the operating pressure differential ( ⁇ p) across such blowers might typically vary under the circumstances between very slight (eg., 1 to 2 psi or - 1/15th to 2/15th atm) to something typical (eg., 15 psi or 1 1 atm). It might be just as typical that a blower of this type be rated for up to 18 psi duty ( - 1-3/15ths atm pressure differential).
  • some end-use applications may require that the discharge line supply flow at a pressure as high as 100 psig ( - 7-2/3rds atm). To do this, the pressure in the inlet line has to be elevated to within 18 psi ( - 1-3/15ths atm pressure differential) or less of the target pressure for the discharge line.
  • the Acoustic Air blower introduced some matters in blower design which have been changed, substantially or so, here for better meeting the objects of the invention. These changes fall under two major categories.
  • One major category comprises changes in design for purely or substantially pneumatic reasons.
  • the other major category comprises changes in design for purely or substantially ease of manufacture reasons.
  • an object of the invention for the Acoustic Air design included reducing pressure pulsations, and thereby reducing resulting noise and vibration.
  • the Acoustic Air design sought to do this by the following two ways.
  • a backflow loop is meant to gradually pre-pressurize a low-pressure closed cell (eg., 64 or 66) so that when the closed cell (eg., 64 or 66) opens across an edge 78 or 80 into the higher-pressure discharge chamber 46, the backflow loop eliminates or weakens the direct backflow from the discharge chamber 46 into the opening closed cell (eg., 64 or 66).
  • the backflow from the discharge chamber 46 flows directly into the opening closed cell (eg., 64 or 66) and is the source of the sonic pop (eg., the noise) as well as the momentary opposition to the rotation of the rotors 50, 52 (eg., the vibration).
  • the Acoustic Air blower has backflow chambers 106, 108, 120, 122 filled by backflow ports 112, 116, 126, 130 and for pre-pressurizing fluid in the sealed pocket (eg., 64, 66) by injector ports 110, 114, 124, 128.
  • the patent contains this remark on the effectiveness of this design.
  • FIGURES 1 through 4 provide line drawings of a rotary positive displacement blower 210 with noise and shock reduction improvements in accordance with the invention. It is an aspect of the invention to incorporate a pair of back-pass manifolds 212.
  • FIGURE 4 shows better that, it has a substantially hollow housing 214 defining an inlet plenum 220, a rotor chamber 224, and a discharge plenum 228. (Preferably the housing 214 is cast, but the flange surfaces would be machined and ground.)
  • a pair of rotors 230 are disposed in the rotor chamber 224.
  • the rotors 230 would be sealed inside by a pair of opposed end plates (far side end plates shown in FIGURES 1 and 2 ).
  • the rotors 230 are driven to rotate counter-rotationally to each other. For instance, the left rotor 230 rotates counter-clockwise (CCW).
  • blower 210 is shown with the inlet port 220P up and the discharge port 228P down.
  • the blower 210 can be mounted in any orientation, and accordingly, terms like “up” and “down”, “left” and “right” are used merely for convenience in this description and do not limit the installation of the blower 210 to any particular orientation.
  • the rotors 230 are identical. Each rotor 230 comprises three lobes 232. Each lobe 232 culminates in a tip 232T. The lobes 232 are spaced by pockets 240.
  • the inlet plenum 220 transitions into the rotor chamber 224 at a pair of spaced ledges 242L, and these define an inlet opening 242 for the blower 210.
  • the rotor chamber 224 transitions into the discharge plenum 228 at another pair of spaced ledges 244L, and these define a discharge opening 244 for the blower 210.
  • FIGURE 4 shows that the left rotor 230's upper lobe tip 232T is about to sweep (counterclockwise) past the left ledge 242L of the inlet opening 242. When it does so, that lobe 232 will trap gas in the pocket 240X immediately ahead of it, between the surface of the rotor 230 and surface of the housing 214.
  • the pocket 240X which temporarily traps gas in it, carrying the trapped gas from the inlet plenum 220 to the discharge plenum 228, is referred to as the 'closed cell' (ie., indicated as 240X).
  • Each pocket 240 in turn will form the temporarily existing closed cell 240X, successively, and in an endless succession.
  • the trapped gas is carried around in the closed cell 240X, from the inlet plenum 220 to the discharge plenum 228, at the pressure of the inlet plenum 220 while being carried around like that. In contrast, the trapped gas will be ultimately discharged into the discharge plenum 228, at the pressure of the discharge plenum 228.
  • the closed cell 240X opens to discharge space.
  • noise eg., an audible sonic pop or snap, something akin to a popping balloon or snapped cell of bubble wrap
  • the reverse flow is a problem of its own.
  • the reverse flow creates an opposing force in opposition to the turning rotors 230, and the rotors 230 have to power through the reverse flow.
  • the reverse flow is a readily identifiable source of inefficiency.
  • the reverse flow also has another effect, which is likewise detrimental, which is that of causing mechanical shock through the blower (vibration), and not just to the blower's castings but also to the joints, couplings, bearings, seals and so on.
  • the reverse flow comprises a pulsing phenomenon. That is, for each revolution of the rotors 230, there are six reverse flow events.
  • the rotors 230 are typically driven at 1200, 1800 or 3600 RPM. At the high value given there, that corresponds to 1.3 million reverse flow pulses -- each hour.
  • the effects of reverse flow comprise an unceasing hammering on the blower, and over its whole lifetime. Accordingly, it is an object of the invention to not just weaken but eliminate each reverse flow event. It is a further object of the invention to reduce vibration, and not so much the frequency of the vibration but the shock value (amplitude) of each pulse. It is a corresponding object of the invention to enhance reliability.
  • a rotary positive displacement blower 210 (of the Roots type) with a back-pass loop 250-52 for gradually pressurizing the closed cell 240X to the pressure of the discharge plenum 228 in order to weaken the strength of the pulsations that would otherwise happen, and thereby reduce noise and shock.
  • FIGURES 1 and 4 show a rotary positive displacement blower 210 provided with a pair of flanking manifolds 212.
  • both manifolds 212 are shown dismounted and apart from the main housing 214.
  • both manifolds 212 are shown mounted to the main housing 214.
  • main housing 214 is a monolithic casting of (preferably) steel, so is each manifold 212 its own separate monolithic casting of steel.
  • the flange surfaces for the bolt-on surfaces are preferably ground very smooth, as are the mating surfaces on the main housing 214.
  • FIGURES 1 and 2 allow discernment that the manifolds 212 mount to the main housing 214 by a pattern of bolts (bolts not shown). Each manifold 212 defines a back-pass chamber 250.
  • the main housing 214 is bored through from both sides in order to form a number of channels 251 and 252 for connecting each back-pass chamber 250 into a back-pass loop 250-52 with the blower 210. That is, the main housing 214 is bored through a series of times into each side of the rotor chamber 224 to form a pattern -- a line parallel with the axis of the rotor 230 - of inner channels 251 to the rotor chamber 224.
  • the main housing 214 is furthermore bored through two times into each side of the discharge plenum 228 to form a pattern of (eg., two in-line) outer channels 252 ('outer' relative to the rotor chamber 224).
  • FIGURE 3 shows better the ports 251P and 252P of the inner and outer channels 251 and 252, respectively, in the rotor chamber 224 and discharge plenum 228, respectively.
  • the cumulative cross-sectional flow area for the two outer channels 252 feeding one manifold 212 chamber 250 equals or is substantially close in value to the cumulative cross-sectional flow area of all the inner channels 251 serving the same manifold 212 chamber 250.
  • the ratio of the cumulative cross-sectional area of the outer channels 251 to that of the inner channels 251 is about one to one (1:1).
  • FIGURE 4 shows better that the flow axis of gas through the blower 210 is generally perpendicular to the plane containing the rotor axes.
  • This plane that contains the rotor axes
  • This plane is referred to herein for convenience sake as the rotor plane.
  • the dowel plane (It might alternatively be referred to as the dowel plane.
  • FIGURE 1 shows better, it is typical that a housing 214 for a Roots blower would contain a pair of flanking dowels 255 in this same plane. These dowels 255 provide for alignment to the end plates and support to the housing 214 in this plane, and hence promote proper lobe tip 232T clearance.)
  • the manifolds 212 mount to the main housing 214 on the discharge side of the rotor plane.
  • FIGURE 4 allows reckoning of the following matters.
  • the lobes 232 of the rotors 230 are angularly spaced apart by 120° .
  • the ledge 242L of the inlet opening 242 and the ledge 244L of the discharge opening 244 are angularly spaced apart by about 180°(relative to rotor rotation).
  • the temporarily existing closed cell 240X is formed for a time period corresponding to a 60° arc of the rotor rotation.
  • the design in accordance with the invention was obtained by virtual prototyping with the use of three-dimensional CFD software from SIMERICS, INC., that goes by the brand name PUMPLINX ® .
  • the CFD analysis was performed with an existing blower of TUTHILL VACUUM & BLOWER SYSTEMS, model QX-3208, serving as the basis for blower dimensions.
  • the operating point for the analysis was chosen to be 3600 RPM at 15 psi ( - 1 atm pressure differential).
  • the prototype blower 210 in accordance with the invention compares to the un-modified original QX-3208 as follows. There was 8.9 db drop and a 12.4 dBA drop in sound pressure levels. There was an average drop across all tested speeds and pressures of 7.4 dB and 10.7 dBA. The maximum sound pressure level drop was 3600 RPM and 18 psi ( - 1-3/15ths atm differential pressure) for both linear and A-weighted scales. These results were 13.2 dB and 17.1 dBA respectively.
  • blower 210 in accordance with the invention there is a noticeable difference in not just the quieting of the sound of the blower 210 in accordance with the invention, but also the quality of the sound. Indeed, there are still personnel employed by TUTHILL VACUUM & BLOWER SYSTEMS who can personally recall the Acoustic Air blower referenced above in connection with U.S. Patent 5,702,240 . One such person includes one of the original inventors.
  • the remarks about the change in sound quality with the blower 210 in accordance with the invention is something as follows:- the blower 210 in accordance with the invention is not just merely a quieter jack hammer, it has sort of lost its jack hammer staccato to where it just sounds like the hum of process machinery.
  • FIGURE 5 is a chart showing the effect of back-pass manifold 212 chamber 250 volume relative to volume of the closed cell 240X on the fluctuation away from mean discharge flowrate.
  • FIGURE 5 shows that the best performance is obtained when manifold 212 chamber 250 volume relative to closed cell 240X volume is 100% (eg., the volumes are equal, or, there is one-to-one correspondence.
  • the fluctuation as a percentage of flowrate discharge is 12.8%. That means that, if the mean discharge centerline flowrate is 100 feet per second ( - 30 m/s), then the fluctuations in the flowrate are between about 93 feet per second ( - 28 m/s) and 107 feet per second ( - 32 m/s).
  • FIGURE 5 shows that when manifold 212 chamber 250 volume as a percentage of closed cell 240X volume is any of the following three values:--
  • the manifold 212 chamber 250 volume as a percentage of closed cell 240X volume should fall between about 56 % and 117 % in order to obtain the preferred performance of the blower 210.
  • the back-pass loop 250-52 weakens the pulsations by having an out-of-phase flow with chambers 250 comparable in volume to the closed cell 240X.
  • REFERENCE LIST NUMERICAL REFERENCE LIST (ALPHABETICAL) 210, blower back-pass chamber, 250 212, manifolds back-pass loop, 250-52 214, housing (main) blower, 210 220, inlet plenum closed cell, 240X 224, rotor chamber discharge plenum, 228 228, discharge plenum discharge port, 228P 230, rotors discharge opening, 244 220P, inlet port dowels, 255 228P, discharge port housing (main), 214 232, lobes inlet port, 220P 232T, lobe tip inlet plenum, 220 240, pockets inlet opening, 242 242L, ledges (of inlet opening) inner channels, 251 242, inlet opening ledges (of discharge opening), 244L 244L, ledges (of discharge opening) ledges (of inlet opening), 242L 244, discharge opening lobe tip, 232T 240X, closed cell lob

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)

Claims (14)

  1. Soufflante Roots à déplacement positif (210) comprenant :
    un logement (214) définissant un plénum d'entrée (220), une chambre de rotor (224) et un plénum d'évacuation (228) ;
    une paire de rotors (230) comprenant chacun au moins trois lobes droits axialement (232), dans laquelle chaque lobe (232) culmine en une pointe (232T) et les lobes (232) sont espacés par des poches (240) ; et dans laquelle la poche (240X) qui capture du gaz entre un lobe de tête et un lobe suivant (232) et une paroi intérieure de la chambre de rotor est une cellule temporairement fermée (240X);
    une paire de boucles de passe arrière (250-252), une pour chaque rotor (230) ;
    chaque boucle de passe arrière (250-252) comprend un collecteur (212) du logement (214) formé avec une chambre de passe arrière (250), des canaux externes (252) formés dans un du collecteur (212) et du logement (214) ou les deux entre le plénum d'évacuation (228) et la chambre de passe arrière (250), et des canaux internes (251) formés dans un du collecteur (212) et du logement (214) ou les deux entre la chambre de passe arrière (250) et la chambre de rotor (224) ; caractérisée en ce que
    le volume de la chambre de passe arrière (250) en tant que pourcentage du volume de la cellule fermée (240X) va de cinquante-six pour cent (56 %) à cent dix-sept pour cent (117 %) ; et
    les canaux internes (251) de chaque boucle de passe arrière (250-252) sont formés par une série d'orifices dans la chambre de rotor (224).
  2. Soufflante (210) selon la revendication 1, dans laquelle la série d'orifices sont tous alignés avec un angle d'attaque qui est proche d'une ligne tangente avec la courbure de la paroi intérieure de la chambre de rotor (224).
  3. Soufflante (210) selon l'une quelconque des revendications 1 à 2, dans laquelle la série d'orifices dans la chambre de rotor (224) sont alignés linéairement sur une ligne parallèle aux axes de rotor.
  4. Soufflante (210) selon l'une quelconque des revendications 1 à 3, dans laquelle une pointe de lobe de tête (232T) de la cellule fermée (240X) s'ouvre en travers des canaux internes (251), la pointe de lobe de tête (232T) s'ouvre en travers de bords courbés et non de rebords.
  5. Soufflante (210) selon l'une quelconque des revendications 1 à 4, dans laquelle la série d'orifices dans la chambre de rotor (224) sont des orifices cylindriques.
  6. Soufflante (210) selon l'une quelconque des revendications 1 à 5, dans laquelle la série d'orifices dans la chambre de rotor (224) comprend au moins quatre orifices de ce type.
  7. Soufflante (210) selon l'une quelconque des revendications 1 à 6, dans laquelle la série d'orifices dans la chambre de rotor (224) sont alignés avec un angle d'attaque qui est proche d'une ligne tangente avec la courbure de la paroi intérieure de la chambre de rotor (224) et dirigés vers le côté arrière d'une pointe de lobe de tête (232T) de la cellule fermée (240X) alors que la pointe de lobe de tête (232T) croise les canaux internes (251).
  8. Soufflante (210) selon l'une quelconque des revendications 1 à 7, dans laquelle la zone de l'endroit où une pointe de lobe de tête (232T) de la cellule fermée (240X) croise les canaux internes (251) à l'endroit où ladite pointe de lobe de tête (232T) croise un rebord (244L) d'une ouverture d'évacuation (244) dans le plénum d'évacuation (228) comprend 30° à 40° degrés angulaires.
  9. Soufflante (210) selon l'une quelconque des revendications 1 à 8, dans laquelle :
    lesdits rotors (230) balaient du gaz à travers la soufflante (210) sur un axe d'écoulement à travers elle qui est généralement perpendiculaire à un plan contenant les axes de rotor ;
    chaque orifice des canaux internes (251) a une forme dans la paroi intérieure de la chambre de rotor qui comprend des bords latéraux espacés le long de lignes parallèles à l'axe de rotor qui se transforment en un bord d'ouverture et un bord de fermeture espacés le long d'un axe parallèle à l'axe d'écoulement ;
    l'étendue de l'espacement entre les bords d'ouverture et de fermeture est supérieure à l'espacement entre les bords latéraux.
  10. Soufflante (210) selon l'une quelconque des revendications 1 à 9, dans laquelle les canaux externes (252) définissent une zone d'écoulement cumulative et les canaux internes (251) définissent une zone d'écoulement cumulative essentiellement proche de la zone d'écoulement cumulative des canaux externes (252).
  11. Soufflante (210) selon l'une quelconque des revendications 1 à 10, dans laquelle les canaux externes (252) sont formés par des orifices percés à travers le logement principal (214) dans le plénum d'évacuation (228).
  12. Soufflante (210) selon la revendication 1, dans laquelle le volume de la chambre de passe arrière (250) en tant que pourcentage du volume de la cellule fermée (240X) va de quatre-vingt-trois pour cent (83 %) à cent dix-sept pour cent (117%).
  13. Soufflante (210) selon la revendication 1 ou 12, dans laquelle chaque rotor (230) est constitué de trois lobes droits axialement (232).
  14. Soufflante (210) selon l'une quelconque des revendications 1 ou 12 à 13, dans laquelle le volume de la chambre de passe arrière (250) en tant que pourcentage du volume de la cellule fermée (240X) comprend un pourcentage essentiellement proche de cent pour cent (100 %).
EP11000544A 2010-01-22 2011-01-24 Souffleuse rotative à déplacement positif avec réduction du bruit et des pulsations Not-in-force EP2348217B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US33649510P 2010-01-22 2010-01-22

Publications (3)

Publication Number Publication Date
EP2348217A2 EP2348217A2 (fr) 2011-07-27
EP2348217A3 EP2348217A3 (fr) 2011-11-30
EP2348217B1 true EP2348217B1 (fr) 2013-01-16

Family

ID=44070059

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11000544A Not-in-force EP2348217B1 (fr) 2010-01-22 2011-01-24 Souffleuse rotative à déplacement positif avec réduction du bruit et des pulsations

Country Status (2)

Country Link
US (2) US20120195783A1 (fr)
EP (1) EP2348217B1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9683521B2 (en) * 2013-10-31 2017-06-20 Eaton Corporation Thermal abatement systems
CN105485020B (zh) * 2016-01-20 2019-01-15 珠海格力电器股份有限公司 一种压缩机及其吸气端盖
US20220145885A1 (en) * 2020-11-12 2022-05-12 Ingersoll-Rand Industrial U.S., Inc. Positive displacement roots blower noise suppression
CN115773243B (zh) * 2022-12-08 2023-10-24 西安交通大学 一种应用于燃料电池汽车系统的罗茨氢泵

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2513446A (en) * 1946-05-17 1950-07-04 Brown And Brown Pump or motor
GB959855A (en) * 1962-03-15 1964-06-03 Polysius Gmbh A roots blower
DE3527292A1 (de) * 1985-07-30 1987-02-12 Aerzener Maschf Gmbh Verfahren zum komprimieren von gasfoermigem foerdermedium sowie roots-kompressor zur durchfuehrung des verfahrens
JPS6432085A (en) * 1987-07-28 1989-02-02 Fuji Heavy Ind Ltd Roots-type compressor
US5090879A (en) * 1989-06-20 1992-02-25 Weinbrecht John F Recirculating rotary gas compressor
US5439358A (en) * 1994-01-27 1995-08-08 Weinbrecht; John F. Recirculating rotary gas compressor
US5702240A (en) * 1995-05-05 1997-12-30 Tuthill Corporation Rotary positive displacement blower having a diverging outlet part
US6099277A (en) * 1998-08-12 2000-08-08 Dresser Industries, Inc. Gas blower and method utilizing recirculation openings
US7156624B2 (en) * 2004-12-09 2007-01-02 Carrier Corporation Compressor sound suppression

Also Published As

Publication number Publication date
US20120195783A1 (en) 2012-08-02
EP2348217A3 (fr) 2011-11-30
US20160245287A1 (en) 2016-08-25
EP2348217A2 (fr) 2011-07-27

Similar Documents

Publication Publication Date Title
EP2348217B1 (fr) Souffleuse rotative à déplacement positif avec réduction du bruit et des pulsations
CN102588281B (zh) 带有旁支脉动陷阱的螺杆式压缩机
AU2002317526B2 (en) Gas compression apparatus and method with noise attenuation
CA2452927C (fr) Dispositif et methode de compression de gaz avec attenuation du bruit
CN102678568B (zh) 带有旁支脉动陷阱的容积式压缩机
CN101451528B (zh) 罗茨式鼓风机降低声特征的方法及装置
EP2472115B1 (fr) Compresseur à expansion sphérique adapté à des conditions de travail variables
US7225789B2 (en) Sealing intersecting vane machines
JP2007177632A5 (fr)
CN217999872U (zh) 一种降低压力脉动的多级罗茨真空泵
EP3356677B1 (fr) Compresseur à vis avec groupes de résonateurs
JP2016513766A (ja) ロータリ圧縮機及びその圧縮装置、エアコン
EP1553302A3 (fr) Compresseur rotatif à palette
US20190277288A1 (en) Apparatus, systems, and methods for economized vapor compression cycle
Wu et al. Simulation of discharge pressure pulsation within twin screw compressors
JP3921551B1 (ja) 多段ルーツ式コンプレッサ
EP3332123B1 (fr) Compresseur volumétrique à lobe pour équipement collectant les déchets
CN202326259U (zh) 带有消声结构的螺杆式压缩机及其转子座
CN201521445U (zh) 螺杆压缩机
WO2021162039A1 (fr) Compresseur
JP2001082370A (ja) ルーツ式真空ポンプ又はルーツ式ブロワ
CN100404868C (zh) 流体环气泵
NO330492B1 (no) Hus for en sentrifugalkompressor og fremgangsmate for fremstilling av samme
CN215566601U (zh) 一种静涡盘和二氧化碳压缩机
CN105526175A (zh) 压缩机及空调

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: F04C 18/12 20060101AFI20111021BHEP

Ipc: F04C 29/06 20060101ALI20111021BHEP

17P Request for examination filed

Effective date: 20120530

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

REG Reference to a national code

Ref country code: AT

Ref legal event code: REF

Ref document number: 594044

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130215

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602011000724

Country of ref document: DE

Effective date: 20130314

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 594044

Country of ref document: AT

Kind code of ref document: T

Effective date: 20130116

REG Reference to a national code

Ref country code: NL

Ref legal event code: VDEP

Effective date: 20130116

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG4D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130516

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130427

Ref country code: BE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130416

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130416

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: MC

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130131

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130417

Ref country code: FI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130516

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: SI

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

REG Reference to a national code

Ref country code: IE

Ref legal event code: MM4A

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: CY

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

26N No opposition filed

Effective date: 20131017

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: IE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130124

REG Reference to a national code

Ref country code: DE

Ref legal event code: R097

Ref document number: 602011000724

Country of ref document: DE

Effective date: 20131017

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140131

Ref country code: CH

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20140131

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: TR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: MK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20130116

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20130124

Ref country code: HU

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT; INVALID AB INITIO

Effective date: 20110124

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 6

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 7

REG Reference to a national code

Ref country code: FR

Ref legal event code: PLFP

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20181218

Year of fee payment: 9

Ref country code: FR

Payment date: 20181219

Year of fee payment: 9

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20190121

Year of fee payment: 9

Ref country code: DE

Payment date: 20190129

Year of fee payment: 9

REG Reference to a national code

Ref country code: DE

Ref legal event code: R119

Ref document number: 602011000724

Country of ref document: DE

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20200124

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200131

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200124

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200801

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20200124