WO2017019114A1 - Blade contour of a rotor for a liquid ring pump - Google Patents
Blade contour of a rotor for a liquid ring pump Download PDFInfo
- Publication number
- WO2017019114A1 WO2017019114A1 PCT/US2015/055515 US2015055515W WO2017019114A1 WO 2017019114 A1 WO2017019114 A1 WO 2017019114A1 US 2015055515 W US2015055515 W US 2015055515W WO 2017019114 A1 WO2017019114 A1 WO 2017019114A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- blade
- tip
- face
- liquid ring
- rotational axis
- 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
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
- F04C19/005—Details concerning the admission or discharge
- F04C19/008—Port members in the form of conical or cylindrical pieces situated in the centre of the impeller
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/12—Blades
- F01D5/14—Form or construction
- F01D5/141—Shape, i.e. outer, aerodynamic form
-
- 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
- F04C19/00—Rotary-piston pumps with fluid ring or the like, specially adapted for elastic fluids
-
- 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
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/18—Centrifugal pumps characterised by use of centrifugal force of liquids entrained in pumps
-
- 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
- F04C2240/20—Rotors
-
- 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
- F04C2250/00—Geometry
- F04C2250/20—Geometry of the rotor
-
- 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
- F04C2250/00—Geometry
- F04C2250/20—Geometry of the rotor
- F04C2250/201—Geometry of the rotor conical shape
-
- 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
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2250/00—Geometry
- F05B2250/10—Geometry two-dimensional
- F05B2250/18—Geometry two-dimensional patterned
- F05B2250/184—Geometry two-dimensional patterned sinusoidal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
- F05B2250/00—Geometry
- F05B2250/70—Shape
- F05B2250/71—Shape curved
Definitions
- the present invention relates to liquid ring pumps. Specifically, the present invention relates to a rotor of a liquid ring pump.
- liquid ring pumps are used to pump or compress gaseous matter, and include a housing and a rotor rotationally supported in the housing.
- the rotor is mounted to a drive shaft within the housing and includes a plurality of blades.
- a chamber i.e., a void space
- the gaseous matter is compressed in the chamber during rotation toward the outlet aperture and expelled from the chamber through the outlet aperture of the housing.
- the invention provides a liquid ring pump including a stationary housing that defines an inner space, and a drive shaft rotatably mounted within the stationary housing.
- the drive shaft defines a rotational axis, and an impeller including a plurality of blades extends radially outward with respect to the rotational axis.
- Each blade includes a root and a tip, such that a continuous curve extends from the tip of each blade through the root of the blade and intersects with the rotational axis.
- the invention provides a liquid ring pump including a stationary housing that defines an inner space, and an inner wall coupled to the stationary housing.
- the inner wall includes an inlet aperture and an outlet aperture.
- a drive shaft is rotatably mounted within the stationary housing and defines a rotational axis.
- An impeller is secured to the drive shaft and includes a first blade extending radially outward from the rotational axis and defining a first tip.
- the impeller includes a second blade extending radially outward from the rotational axis opposite the first blade and defining a second tip.
- the first blade and the second blade lie on a continuous curve in a plane normal to the rotational axis that extends from the first tip to the second tip.
- the invention provides a blade for a liquid ring impeller.
- the blade including a root, a tip opposite the root, and a body extending between the root and the tip.
- a continuous curve extends from the tip of each blade through the root of the blade and intersects with a rotational axis of the impeller.
- the continuous curve is a sinusoidal- like curve.
- FIG. 1 is an exploded perspective view of a liquid ring pump.
- FIG. 2 is a perspective view of a rotor of the liquid ring pump of FIG. 1.
- FIG. 3 is a cross-sectional side view of the rotor of FIG. 2 taken along line 30 of FIG. 4.
- FIG. 4 is a side view of the rotor of FIG. 2.
- FIG. 5 is a cross-sectional front view of the rotor along section line 5-5 of FIG. 4.
- FIG. 6 is a cross-sectional front view of a rotor according to another embodiment.
- FIG. 7 is a cross-sectional front view of a rotor according to yet another
- FIG. 1 illustrates a pump, such as a liquid ring pump 10 of the present invention.
- the liquid ring pump 10 of the illustrated embodiment is a single-stage liquid ring pump including an end plate 12 and a housing 13 adjacent to the end plate 12.
- the end plate 12 supports a prime mover (not shown) and a rotor 14.
- the liquid ring pump 10 may be a multi-stage liquid ring pump such that one or more rotors 14 may cooperate in parallel or series as desired.
- the end plate 12 includes an inner wall 16 having an inlet port 18 in fluid communication with a gas inlet 20, and an outlet port 22 in fluid communication with a gas outlet 24.
- the liquid ring pump 10 operates, for example, as a pump when the gas inlet 20 is the working end.
- the gas inlet 20 is a vacuum (i.e., below atmospheric pressure), whereas the gas outlet 24 is substantially at atmospheric pressure or higher.
- the liquid ring pump 10 operates, for example, as a compressor when the gas outlet 24 is the working end.
- the gas inlet 20 is typically at atmospheric pressure, whereas the gas outlet 24 is at a pressure greater than atmospheric pressure. Therefore, the gas inlet 20 is at a lower pressure compared to the gas outlet 24 in each application.
- the terms “compressor” and "pump” are largely interchangeable.
- the end plate 12 of the illustrated embodiment rotationally supports a drive shaft 28.
- the rotor 14 is coupled to the drive shaft 28 for co-rotation in a clockwise direction 29 about a rotational axis 30 (e.g., via a keyed coupling 32).
- the drive shaft 28 is
- a frusto-conical port member 34 is disposed adjacent to the inner wall 16 of the end plate 12 and at least partially received within the rotor 14. The frusto- conical port member 34 facilitates fluid communication between the rotor 14, and the inlet and outlet ports 18, 22.
- the illustrated end plate 12 is configured to support the conical rotor 14, in other embodiments the end plate 12 may be configured to support a flat-plate rotor that cooperates with a flat port plate rather than the conical port member 34 to facilitate flow between the inlet 20 and the outlet 24. Furthermore, the rotor 14 may rotate in a
- the rotor 14 includes a central hub 40, a rim 42, and a plurality of blades 44 extending between the central hub 40 and the rim 42.
- the plurality of blades 44 are angularly spaced at regular intervals around the central hub 40 and extend radially outward with respect to the rotational axis 30 of the rotor 14.
- the chamber 46 is a constantly varying volumetric space due to the eccentric liquid ring 33 surrounding the rotor 14.
- the rotor 14 further includes a first end 48 and a second end 50 defining an axial length of the rotor 14 therebetween.
- the first end 48 includes a frusto-conical space 52 (best illustrated in FIG. 3) that at least partially receives the frusto-conical port member 34.
- the frusto-conical space 52 is concentric with the shaft 28 and converges toward the central hub 40.
- Disposed midway between the first end 48 and the second end 50 of the rotor 14 is an annular disk 54 that stiffens the rotor 14, and more specifically each blade 44.
- the second end 50 may include the frusto-conical space 52 to at least partially receive a seperate frusto-conical port member similar to the port member 34.
- each blade 44 of the rotor 14 has a length extending substantially between the first end 48 and the second end 50 of the rotor 14 (FIG. 4).
- a height of each blade 44 is defined by the distance between a root 56, which is adjacent to at least one of the central hub 40 and the frusto-conical space 52, and a tip 58, which is opposite the root 56 adjacent to the outer periphery of the rim 42 (FIG. 5).
- a thickness of each blade 44 is defined by the distance between a first face 60 of each blade 44 and a second face 62 of each blade 44 opposite the first face 60.
- each blade 44 is of generally uniform thickness (i.e., plus or minus 10 percent) between the first face 60 and the second face 62 along the height of each blade 44. While the illustrated blades 44 include a substantially uniform thickness along the height, other constructions may include variable thickness along the height (e.g., FIG. 7). [0020] With reference to FIG. 5, each blade 44 of the rotor 14 defines a sinusoidal-like curve 64 such that a continuous curve extends from the tip 58 of each blade 44 through the root 56 of each blade 44 and intersects with the rotational axis 30.
- the sinusoidal-like curve 64 includes one full cycle (i.e., one period) extending from the tip 58 of one of the plurality of blades 44 to the tip 58 of an opposite one of the plurality of blades 44 in a plane normal to the rotational axis 30 (i.e., the plane of Section A-A).
- each blade 44 further defines an amplitude of approximately 1.0, which is a measure of the maximum deviation (i.e., the crest 66, and the trough 68) from the common axis 72.
- the amplitude is a measure of the
- each blade 44 has a concave surface disposed between the root 56 and the tip 58.
- the second face 62 of each blade 44 has a convex surface disposed between the root 56 and the tip 58.
- the spacing at regular intervals of each blade 44 around the central hub 40 assures that when the rotor 14 is rotating in the clockwise direction 29, the tip 58 of each blade 44 extends forward of a virtual straight line which lies within a plane normal to the rotational axis 30 that intersects the rotational axis 30 and the root 56 of the adjacent blade 44.
- each blade 144 includes four full periods of the sinusoidal-like curve 164 extending from the tip 158 of one of the plurality of blades 144 to the tip 158 of an opposite one of the plurality of blades 144 in a plane normal to the rotational axis 30 (i.e., the plane of Section A- A).
- a first face 160 and a second face 162 of each of the plurality of blades 144 have a concave surface and a convex surface disposed between the root 156 and the tip 158.
- each blade 144 further defines an amplitude of approximately 0.125 measured by the perpendicular distance between a common axis 172 and a parallel axis 174 tangent to a crest 166 or a trough 168 of each blade 144.
- the blades 144 of FIG. 6 follow a sinusoidal-like curve that is continuous in the mathematical sense (i.e., follows a non-linear curve in which small changes in the "y” value result in small changes in the "x” values with no sudden changes in slope) from the tip of each blade, through the rotational axis to the tip of an opposite blade.
- FIG. 7 illustrated a rotor 214 according to another embodiment.
- the rotor 214 includes similar features to the rotors 14, 114 of FIGS. 5 and 6 having a plurality of blades 244 extending radially outward that include a root 256, a tip 258, a first face 260, and a second face 262.
- the thickness of each blade 244 is non-uniform along the height of each blade 244.
- the thickness of each blade 244 narrows at the root 256 and the tip 258, such that the first face 260 and the second face 262 converge toward each other proximate the root 256 and the tip 258.
- each blade 244 extends between the central hub 40 and the rim 42 of the rotor 214, and extends along a curve that lies within a plane normal to the rotational axis 30.
- the first face 260 and the second face 262 of each of the blades 244 have a concave surface and a convex surface disposed between the root 256 and the tip 258.
- the curve that each blade 244 extends along does not intersect with the rotational axis 30.
- the construction of FIG. 7 like the constructions of FIGS. 5 and 6 includes blades that follow a continuous non- linear curve from their root to their tip.
- the curves followed by the blades of FIG. 7 do not extend and remain continuous across the rotational axis 30 of the rotor 214 to an opposite blade 244.
- the curved portion near the root 256 of the blades 244 changes the flow angle of the gas, thereby decreasing friction and turbulence and enhancing pressure recovery.
- the rotor 14, 114, 214 is rotated within the housing 13 as the prime mover is activated to produce the liquid ring 33.
- the chambers 46, 146, 246 act as a rotating piston to draw gaseous matter at a first pressure from the inlet port 18 and corresponding gas inlet 20.
- the gaseous matter is drawn into the chambers 46, 146, 246 due to the receding liquid ring 33 proximate to the inlet port 18.
- the frusto-conical member 34 facilitates flow (e.g., intake flow and discharge flow) of gaseous matter through the frusto-conical member 34 and the rotor 14 between the inlet port 18 and outlet port 22 of the inner wall 16.
- the rotor 14, 114, 214 including a plurality of blades having a sinusoidal-like continuous curve (or another continuous curve) of the above description provides advantages in terms of efficiency gains as a result of friction reduction, especially at high vacuum and high speed applications.
- the increased efficiency gains extend the working range of the single-stage liquid ring compressor/pump to applications currently operated with a multi-stage liquid ring compressor/pump, reduce costs, and allow for greater flexibility of use.
- the single- stage liquid ring compressors/pumps can be advantageous as they allow some flexibility in terms of inlet pressure and flow rate.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
Claims
Priority Applications (9)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112018001881A BR112018001881A2 (en) | 2015-07-30 | 2015-10-14 | liquid ring, impeller, and shovel pumps |
CN201580082073.2A CN108138776A (en) | 2015-07-30 | 2015-10-14 | For the blade profile of the rotor of liquid rotary pump |
US15/748,825 US20180216468A1 (en) | 2015-07-30 | 2015-10-14 | Blade contour of a rotor for a liquid ring pump |
EP15899904.5A EP3329125A4 (en) | 2015-07-30 | 2015-10-14 | Blade contour of a rotor for a liquid ring pump |
AU2015403320A AU2015403320A1 (en) | 2015-07-30 | 2015-10-14 | Blade contour of a rotor for a liquid ring pump |
KR1020187005710A KR20180035853A (en) | 2015-07-30 | 2015-10-14 | Blade contour of rotor for liquid ring pump |
CA2994104A CA2994104A1 (en) | 2015-07-30 | 2015-10-14 | Blade contour of a rotor for a liquid ring pump |
JP2018504742A JP2018522163A (en) | 2015-07-30 | 2015-10-14 | Blade structure of rotor for liquid ring pump |
ZA201800588A ZA201800588B (en) | 2015-07-30 | 2018-01-29 | Blade contour of a rotor for a liquid ring pump |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201562198898P | 2015-07-30 | 2015-07-30 | |
US62/198,898 | 2015-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2017019114A1 true WO2017019114A1 (en) | 2017-02-02 |
Family
ID=57884883
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2015/055515 WO2017019114A1 (en) | 2015-07-30 | 2015-10-14 | Blade contour of a rotor for a liquid ring pump |
Country Status (10)
Country | Link |
---|---|
US (1) | US20180216468A1 (en) |
EP (1) | EP3329125A4 (en) |
JP (1) | JP2018522163A (en) |
KR (1) | KR20180035853A (en) |
CN (1) | CN108138776A (en) |
AU (1) | AU2015403320A1 (en) |
BR (1) | BR112018001881A2 (en) |
CA (1) | CA2994104A1 (en) |
WO (1) | WO2017019114A1 (en) |
ZA (1) | ZA201800588B (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10584705B2 (en) * | 2015-04-30 | 2020-03-10 | Zhejiang Sanhua Automotive Components Co., Ltd. | Centrifugal pump and method for manufacturing the same |
WO2018139070A1 (en) | 2017-01-30 | 2018-08-02 | 株式会社 荏原製作所 | Liquid sealing type vacuum pump |
CN114909186A (en) * | 2021-02-08 | 2022-08-16 | 中国航发商用航空发动机有限责任公司 | Impeller machinery and aeroengine |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4747752A (en) * | 1987-04-20 | 1988-05-31 | Somarakis, Inc. | Sealing and dynamic operation of a liquid ring pump |
US20060280609A1 (en) * | 2005-06-08 | 2006-12-14 | Dresser-Rand Comapny | Impeller with machining access panel |
US20110243758A1 (en) * | 2008-12-18 | 2011-10-06 | Douglas Eric Bissell | Liquid ring pump with gas scavenge device |
US20140119955A1 (en) * | 2012-10-30 | 2014-05-01 | Gardner Denver Nash, Llc | Port plate of a flat sided liquid ring pump having a gas scavenge passage therein |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2302747A (en) * | 1938-12-17 | 1942-11-24 | Dardelet Robert Leon | Pump or compressor of the liquid ring type |
CH380865A (en) * | 1960-04-28 | 1964-08-14 | Ravera Vincenzo | Symmetrical liquid ring rotary compressor for harmful and / or corrosive gases |
US4422832A (en) * | 1981-10-23 | 1983-12-27 | The Nash Engineering Company | Liquid ring pump with vanes in liquid ring |
DE10250776A1 (en) * | 2002-10-30 | 2004-05-13 | Siemens Ag | Impeller for a centrifugal pump |
CN101520048A (en) * | 2008-02-29 | 2009-09-02 | 金保国 | Single-step cantilever liquid ring pump with dual-function of radial air inlet and exhaust |
CN201636014U (en) * | 2010-01-12 | 2010-11-17 | 河南省豫通泵业有限公司 | High efficiency liquid ring pump |
-
2015
- 2015-10-14 AU AU2015403320A patent/AU2015403320A1/en not_active Abandoned
- 2015-10-14 BR BR112018001881A patent/BR112018001881A2/en not_active Application Discontinuation
- 2015-10-14 EP EP15899904.5A patent/EP3329125A4/en not_active Withdrawn
- 2015-10-14 CA CA2994104A patent/CA2994104A1/en not_active Abandoned
- 2015-10-14 JP JP2018504742A patent/JP2018522163A/en not_active Withdrawn
- 2015-10-14 KR KR1020187005710A patent/KR20180035853A/en unknown
- 2015-10-14 WO PCT/US2015/055515 patent/WO2017019114A1/en active Application Filing
- 2015-10-14 CN CN201580082073.2A patent/CN108138776A/en active Pending
- 2015-10-14 US US15/748,825 patent/US20180216468A1/en not_active Abandoned
-
2018
- 2018-01-29 ZA ZA201800588A patent/ZA201800588B/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4747752A (en) * | 1987-04-20 | 1988-05-31 | Somarakis, Inc. | Sealing and dynamic operation of a liquid ring pump |
US20060280609A1 (en) * | 2005-06-08 | 2006-12-14 | Dresser-Rand Comapny | Impeller with machining access panel |
US20110243758A1 (en) * | 2008-12-18 | 2011-10-06 | Douglas Eric Bissell | Liquid ring pump with gas scavenge device |
US20140119955A1 (en) * | 2012-10-30 | 2014-05-01 | Gardner Denver Nash, Llc | Port plate of a flat sided liquid ring pump having a gas scavenge passage therein |
Non-Patent Citations (1)
Title |
---|
See also references of EP3329125A4 * |
Also Published As
Publication number | Publication date |
---|---|
EP3329125A1 (en) | 2018-06-06 |
CA2994104A1 (en) | 2017-02-02 |
JP2018522163A (en) | 2018-08-09 |
BR112018001881A2 (en) | 2018-09-18 |
KR20180035853A (en) | 2018-04-06 |
CN108138776A (en) | 2018-06-08 |
EP3329125A4 (en) | 2019-04-03 |
AU2015403320A1 (en) | 2018-02-22 |
ZA201800588B (en) | 2019-10-30 |
US20180216468A1 (en) | 2018-08-02 |
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