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WO2014151461A1 - Suppression du bruit par accord de phase de conduits communicants d'un compresseur roots et d'un détendeur roots - Google Patents

Suppression du bruit par accord de phase de conduits communicants d'un compresseur roots et d'un détendeur roots Download PDF

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Publication number
WO2014151461A1
WO2014151461A1 PCT/US2014/025790 US2014025790W WO2014151461A1 WO 2014151461 A1 WO2014151461 A1 WO 2014151461A1 US 2014025790 W US2014025790 W US 2014025790W WO 2014151461 A1 WO2014151461 A1 WO 2014151461A1
Authority
WO
WIPO (PCT)
Prior art keywords
roots
duct
expander
supercharger
type
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.)
Ceased
Application number
PCT/US2014/025790
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English (en)
Inventor
Rodney Champlin GLOVER, III
William Nicholas Eybergen
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.)
Eaton Corp
Original Assignee
Eaton 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 Eaton Corp filed Critical Eaton Corp
Priority to DE112014001407.9T priority Critical patent/DE112014001407T5/de
Publication of WO2014151461A1 publication Critical patent/WO2014151461A1/fr
Priority to US14/854,680 priority patent/US20160003254A1/en
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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
    • 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
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C11/00—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type
    • F01C11/002—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type of similar working principle
    • F01C11/004—Combinations of two or more machines or engines, each being of rotary-piston or oscillating-piston type of similar working principle and of complementary function, e.g. internal combustion engine with supercharger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
    • F01C13/04—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby for driving pumps or compressors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/003—Systems for the equilibration of forces acting on the elements of the machine
    • F01C21/006—Equalization of pressure pulses
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K5/00—Plants characterised by use of means for storing steam in an alkali to increase steam pressure, e.g. of Honigmann or Koenemann type
    • F01K5/02—Plants characterised by use of means for storing steam in an alkali to increase steam pressure, e.g. of Honigmann or Koenemann type used in regenerative installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
    • F02B33/36—Engines with pumps other than of reciprocating-piston type with rotary pumps of positive-displacement type
    • F02B33/38—Engines with pumps other than of reciprocating-piston type with rotary pumps of positive-displacement type of Roots type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
    • F02G5/00—Profiting from waste heat of combustion engines, not otherwise provided for
    • F02G5/02—Profiting from waste heat of exhaust gases
    • 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
    • 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
    • F04C23/003—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 having complementary function
    • 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
    • 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
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F04C29/122—Arrangements for supercharging the working space
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C1/00—Rotary-piston machines or engines
    • F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
    • F01C1/12—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
    • F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
    • F01C21/18—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy
    • F01N5/04—Exhaust or silencing apparatus combined or associated with devices profiting by exhaust energy the devices using kinetic energy
    • 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
    • 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
    • F04C29/12—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • Roots-type devices are volumetric devices that output a fixed volume of fluid per rotation.
  • roots-type devices are used in supercharger systems as blowers to boost the pressure of fluid provided to a power source such as an internal combustion engine or a fuel cell.
  • the roots-type devices are used as expanders to extract energy from waste heat from a power source that would otherwise be wasted, such as an exhaust stream from a fuel cell, a working fluid that extracts heat from an internal combustion engine, or an exhaust fluid stream from an internal combustion engine. In all scenarios, there is noise associated with the passage of fluid through the roots-type devices.
  • a volumetric assembly includes: a roots-type supercharger device having at least two supercharger rotors, with each of the rotors having two or more lobes, the roots-type supercharger defining a supercharger fluid inlet and a supercharger fluid outlet; a roots-type expander device having at least two expander rotors, with each of the rotors having two or more lobes, the roots-type expander defining an expander fluid inlet and an expander fluid outlet; a first duct extending from the supercharger fluid inlet, the first duct supplying fluid to the roots-type supercharger device; and a second duct extending from the expander fluid outlet, the second duct directing fluid away from the roots-type expander device, wherein the first duct is positioned adjacent to the second duct, and wherein the first duct defines a first aperture and the second duct defines a second aperture, the first and second apertures being generally aligned; and a
  • a system in another aspect, includes: a power source; and a volumetric assembly, the volumetric assembly including: a roots-type supercharger device having at least two supercharger rotors, with each of the rotors having two or more lobes, the roots-type supercharger defining a supercharger fluid inlet and a supercharger fluid outlet, the supercharger fluid outlet being connected to the power source to provide fluid for boosting the power source; a roots-type expander device having at least two expander rotors, with each of the rotors having two or more lobes, the roots-type supercharger defining an expander fluid inlet and an expander fluid outlet, the expander fluid inlet being coupled to a working fluid or an exhaust of the power source to provide fluid to the expander fluid inlet, and the roots-type expander device applying torque to the power source; a first duct extending from the supercharger fluid inlet, the first duct supplying fluid to the roots-type supercharger device; and
  • a method of boosting a power plant and recovering energy from waste heat of the power plant includes: providing a roots-type supercharger device to boost the power plant, the roots-type supercharger having an inlet duct;
  • the roots-type expander device having an outlet duct; positioning the inlet duct adjacent to the outlet duct; and configuring a membrane positioned in an aperture between the inlet and outlet ducts to flex as pressure changes within the inlet and outlet ducts.
  • FIGURE 1 is a schematic illustration of a system including a power plant and a volumetric device.
  • FIGURE 2 is a perspective view of an example volumetric supercharger device of the system of Figure 1.
  • FIGURE 3 is a schematic illustration of rotors of the volumetric
  • FIGURE 4 is a cross-sectional view of an example volumetric expander device of the system of Figure 1.
  • FIGURE 5 is a schematic illustration of rotors of the volumetric expander device of Figure 4.
  • FIGURE 6 is a perspective view of the volumetric assembly of Figure 1.
  • FIGURE 7 is a schematic view of a portion of the volumetric assembly of Figure 6.
  • FIGURE 8 is a schematic view of an example flexible member of the volumetric assembly of Figure 7.
  • FIGURE 9 is a schematic illustration of another system.
  • FIGURE 10 is a schematic illustration of the noise cancellation operation of the system shown in Figure 1.
  • Figure 1 shows an example system 100 including a power source 102, such as an internal combustion engine or a fuel cell, and a volumetric assembly 104 coupled thereto.
  • a power source 102 such as an internal combustion engine or a fuel cell
  • a volumetric assembly 104 coupled thereto.
  • the power source 102 is used to power various devices, such as a vehicle.
  • a fuel cell is used as the power source.
  • the volumetric assembly 104 includes a volumetric supercharger device 110 and a volumetric expander device 112. Both devices 110, 112 are roots-type devices. Roots-type devices are fixed displacement devices that output a fixed volume of fluid per rotation.
  • the volumetric supercharger device 110 (sometimes referred to as a "supercharger” or “blower”) is used to pump fluid from the atmosphere to the power source 102.
  • the supercharger is used to boost a pressure of the fluid that is delivered to the power source 102, increasing oxygen which allows more fuel. This enhances performance of the power source 102.
  • the same is true for a fuel cell, except the electrical output increases.
  • the example volumetric supercharger device 110 includes two rotors 220, 222.
  • the rotors 220, 222 are helical in configuration and rotate relative to one another in a coordinated fashion. Fluid provided at a fluid inlet 210 of the volumetric supercharger device 110 is pumped by the volumetric supercharger device 110 and delivered via an outlet 212 to the power source 102. Torque provided by the power source 102 or other external energy sources causes the volumetric supercharger device 110 to rotate.
  • each of the rotors 220, 222 has four lobes 224. These lobes 224 intermesh as the rotors 220, 222 spin to pump the fluid through the volumetric supercharger device 110. More or fewer lobes can be used.
  • volumetric supercharger device is described in International Patent Application No. PCT/US 12/40736 filed on June 4, 2012, the entirety of which is hereby incorporated by reference. Other configurations are possible.
  • the example volumetric expander device 112 (sometimes referred to as an "expander") includes two rotors 320, 322.
  • the rotors 320, 322 are helical in configuration and rotate relative to one another in a coordinated fashion.
  • Fluid provided at a fluid inlet 310 of the volumetric expander device 112 causes the rotors 320, 322 to spin as the fluid moves through the volumetric expander device 112 to an outlet 312.
  • this fluid is derived from exhaust gases of the power source 102 and includes either exhaust gases or other fluids derived from a Rankine cycle.
  • Torque generated by the volumetric expander device 112 is delivered to the power source 102 or other components.
  • a compressor provides oxygen to the fuel cell stack.
  • an expander can be used. The expander, which is attached directly to the roots compressor, controls the pressure built up in the fuel cell stack.
  • each of the rotors 320, 322 has two lobes 324. These lobes 324 intermesh as the rotors 320, 322 spin. More or fewer lobes can be used.
  • volumetric expander device is described in International Patent Application No. PCT/US 13/28273 filed on February 28, 2013, the entirety of which is hereby incorporated by reference. Other configurations are possible.
  • the volumetric assembly 104 is shown again.
  • the fluid inlet 210 of the volumetric supercharger device 110 is connected to an inlet duct 510 that passes fluid through a passage 512 formed by the inlet duct 510 and into the volumetric supercharger device 110.
  • the fluid outlet 312 of the volumetric expander device 112 is connected to an outlet duct 520 so that fluid from the volumetric expander device 112 passes through a passage 522 as the fluid exits the volumetric expander device 112.
  • the ducts 510, 512 are positioned to converge so that the ducts 510, 512 abut one another.
  • the duct 510 includes an aperture 516 and the duct 520 includes an aperture 526 that generally align with one another as the ducts 510, 512 abut.
  • a flexible membrane 610 is positioned within these apertures 516, 526 to close the apertures 516, 526 so that fluid passing through the passage 512 does not mix with fluid passing through the passage 522.
  • the volumetric assembly 104 is controlled so that the pressure waves at the flexible membrane 610 are generally 180 degrees out of phase with each other.
  • the volumetric supercharger device 110 and the volumetric expander device 112 are controlled so that the inlet pressure for the volumetric supercharger device 110 is generally 180 degrees out of phase with the outlet pressure for the volumetric expander device 112.
  • the inlet pressure 1002 is shown as being 180 degrees out of phase with the outlet pressure 1004, wherein the inlet and outlet pressure 1002, 1004 have the same amplitude and frequency.
  • the resulting additive combination of the inlet and outlet pressure 1002, 1004 is shown at pressure line 1006 which is shown as being completely flat as the inlet and outlet pressures 1002, 1004 completely cancel each other out. It is noted that pressure line 1006, which is reflective of any remaining non-cancelled sound, may have a non-zero value where the inlet and outlet pressure 1002, 1004 do not completely cancel each other out.
  • oscillating inlet and outlet pressures 1002, 1004 will not cancel each other out completely if the amplitudes are different, if the frequency is different, and/or the phases are not fully out of phase with each other. Also, cancellation may not occur in certain instances where the
  • supercharger rotors and the expander rotors have a different number of lobes.
  • a four lobe compressor used in conjunction with a four lobe expander running at half the speed of the compressor will result in only half of the noise being cancelled if the pressure amplitudes are the same.
  • noise associated with the fluids flowing through the ducts 510, 520 can be attenuated. Specifically, some of the kinetic energy from the fluids flowing through one of the ducts 510, 520 is transferred to the other of the ducts 510, 520 through the flexible membrane at given periods of time to attenuate noise.
  • the number of lobes of the rotors for each volumetric device is equal if the speed (i.e., revolutions per minute) is equal. If one volumetric device runs more quickly than the other, then the number of lobes must be varied such that the ratio of the speed equals the ratio of the lobes.
  • the volumetric supercharger device 110 has four lobes 224 per rotor 220, 222, and the volumetric expander device 112 has two lobes 324 per rotor 320, 322.
  • the volumetric expander device 112 is run at twice the speed of the volumetric supercharger device 110
  • the flexible member 610 is located near the volumetric assembly 104, so that temperature and pressure in each of the ducts 510, 520 will generally be the same. This will make the wavelength at the pulsation frequency very close to the same in each of the ducts 510, 520.
  • the flexible membrane 610 is, in this example, capable of handling 1 to 2 psi pressure inputs and is generally acoustically transparent (i.e., has a high degree of flexibility) to allow as much communication between the ducts 510, 520 as possible.
  • the material for the flexible membrane 610 is configured to be soft (flexible) but also be tough.
  • One possible example of such as material is Mylar. Other polymeric materials can be used.
  • the flexible member 610 can be configured with circumferential folds to allow for a large degree of motion.
  • the flexible member 610 includes folds 624 located at ends 622 of the flexible member 610 that are attached to the ducts 510, 520. This allow for maximum flex for the flexible member 610 when mounted to the ducts 510, 520. Other configurations are possible.
  • FIG. 7 an alternative example system 700 is shown.
  • the system 700 can be used in conjunction with an internal combustion engine or a fuel cell, as described above.
  • the system 700 includes an inlet 702 coupled to a roots expander.
  • the inlet 702 leads into a main pipe 706.
  • the main pipe 706 is, in turn, connected to an outlet 704.
  • the path formed by 702, 706, 704 allows the fluid from the expander to flow therethrough.
  • the main pipe 706 surrounds a second set of pipes.
  • This second set of pipes includes an inlet pipe 710 and an outlet pipe 712.
  • the outlet pipe 712 is connected to the inlet of the roots compressor.
  • a flexible membrane 720 Positioned between the inlet and outlet pipes 710, 712 is a flexible membrane 720.
  • This flexible membrane 720 functions in a similar manner to the flexible member 610 described above. By controlling the timing of the flow of fluids through the two passages (as described above), the flexible membrane 720 can provide noise cancelation benefits.
  • the ducts are located a distance apart, and a "Tee" duct or tube is run therebetween.
  • One or more flexible membrane is positioned in the Tee duct to provide the acoustical performance.
  • a length of the Tee duct can be varied to achieve the desired acoustical performance for a given application.
  • the length of the tube may be adjusted to adjust the distance from the source to the cancellation membrane to ensure that the pressures are 180 degrees out of phase. Other examples are possible.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Supercharger (AREA)
  • Fuel Cell (AREA)

Abstract

L'invention porte sur un ensemble volumétrique, qui comprend : un dispositif de compresseur Roots; un dispositif de détendeur Roots; un premier conduit s'étendant de l'entrée de fluide de compresseur de suralimentation, le premier conduit fournissant un fluide au dispositif de compresseur Roots; et un second conduit s'étendant de la sortie de fluide de détendeur, le second conduit dirigeant le fluide à l'opposé du dispositif de détendeur Roots, le premier conduit étant placé de façon adjacente au second conduit, et le premier conduit définissant une première ouverture et le second conduit définissant une seconde ouverture, les première et seconde ouvertures étant sensiblement alignées; et une membrane flexible positionnée entre les premier et second conduits dans les première et seconde ouvertures, la membrane flexible isolant hermétiquement le premier conduit du second conduit, et la membrane flexible fléchissant lorsqu'un fluide s'écoule dans les premier et second conduits pour atténuer un bruit lié à l'écoulement de fluide.
PCT/US2014/025790 2013-03-15 2014-03-13 Suppression du bruit par accord de phase de conduits communicants d'un compresseur roots et d'un détendeur roots Ceased WO2014151461A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE112014001407.9T DE112014001407T5 (de) 2013-03-15 2014-03-13 Geräuschunterdrückung durch phasenangepasste kommunizierende Kanäle von Gebläsen und Expandern vom Roots-Typ
US14/854,680 US20160003254A1 (en) 2013-03-15 2015-09-15 Noise cancellation by phase-matching communicating ducts of roots-type blower and expander

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201361793499P 2013-03-15 2013-03-15
US61/793,499 2013-03-15

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US14/854,680 Continuation US20160003254A1 (en) 2013-03-15 2015-09-15 Noise cancellation by phase-matching communicating ducts of roots-type blower and expander

Publications (1)

Publication Number Publication Date
WO2014151461A1 true WO2014151461A1 (fr) 2014-09-25

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ID=50424787

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CN111734630A (zh) * 2019-03-25 2020-10-02 一汽解放汽车有限公司 一种带能量回收功能的燃料电池罗茨式空压机
CN111535889B (zh) * 2020-05-07 2021-01-05 江苏科瑞德智控自动化科技有限公司 一种低品质余热高效利用系统

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GB2060766A (en) * 1979-10-05 1981-05-07 Wallace Murray Corp I.C. engine with a vapour turbine driven supercharger
DE3227459A1 (de) * 1982-07-22 1984-01-26 Wankel Gmbh, 1000 Berlin Anordnung zum aufladen einer brennkraftmaschine
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DE112014001407T5 (de) 2016-01-07
CN104047855A (zh) 2014-09-17
US20160003254A1 (en) 2016-01-07

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