US20060065478A1 - Compressor sound suppression - Google Patents
Compressor sound suppression Download PDFInfo
- Publication number
- US20060065478A1 US20060065478A1 US10/956,509 US95650904A US2006065478A1 US 20060065478 A1 US20060065478 A1 US 20060065478A1 US 95650904 A US95650904 A US 95650904A US 2006065478 A1 US2006065478 A1 US 2006065478A1
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- United States
- Prior art keywords
- compressor
- muffler
- centerbody
- rotor
- axis
- 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.)
- Abandoned
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Classifications
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- 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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/02—Silencing apparatus characterised by method of silencing by using resonance
-
- 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
- F04C18/14—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 toothed rotary pistons
- F04C18/16—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 toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
- F04C18/165—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 toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type having more than two rotary pistons with parallel axes
-
- 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
- F01C21/10—Outer members for co-operation with rotary pistons; Casings
-
- 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
- F01N1/00—Silencing apparatus characterised by method of silencing
- F01N1/08—Silencing apparatus characterised by method of silencing by reducing exhaust energy by throttling or whirling
-
- 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
- F04C29/06—Silencing
- F04C29/061—Silencers using overlapping frequencies, e.g. Helmholtz resonators
-
- 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
-
- 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
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/12—Vibration
-
- 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
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/13—Noise
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49229—Prime mover or fluid pump making
- Y10T29/49236—Fluid pump or compressor making
- Y10T29/49238—Repairing, converting, servicing or salvaging
Definitions
- the invention relates to compressors. More particularly, the invention relates to sound and vibration suppression in screw-type compressors.
- One aspect of the invention involves a compressor including a housing and one or more working elements.
- a muffler is located downstream of the discharge plenum and a helmholtz resonator is located in the discharge plenum upstream of the muffler.
- the helmholtz resonator may be formed in a centerbody between a bearing case and an inner element of the muffler.
- the helmholtz resonator may be added in a redesign or reengineering of an existing compressor configuration and/or a remanufacturing of an existing compressor previously lacking such a resonator.
- parameters of the resonator may be optimized to provide a desired degree of suppression of a desired target type of vibration.
- the resonator may limit external sound radiated by the discharge housing and downstream piping due to resonating of discharge pulsation from the one or more working elements
- FIG. 1 is a longitudinal sectional view of a compressor.
- FIG. 2 is an enlarged view of a discharge plenum of the compressor of FIG. 1 .
- FIG. 3 is a sectional view of the compressor of FIG. 1 taken along line 3 - 3 .
- FIG. 4 is a sectional view of the compressor of FIG. 1 taken along line 4 - 4 .
- FIG. 1 shows a compressor 20 having a housing or case assembly 22 .
- the exemplary compressor is a three-rotor, screw-type, hermetic compressor having rotors 26 , 28 , and 30 with respective central longitudinal axes 500 , 502 , and 504 .
- the first rotor 26 is a male-lobed rotor driven by a coaxial electric motor 32 and, in turn, enmeshed with and driving the female-lobed rotors 28 and 30 .
- the male rotor axis 500 also forms a central longitudinal axis of the compressor 20 as a whole.
- the rotor working portions are located within a rotor case segment 34 of the case assembly 22 and may be supported by bearings 36 and sealed by seals 38 engaging rotor shafts at each end of the associated rotor working portion.
- the rotors When driven by the motor 32 , the rotors pump and compress a working fluid (e.g., a refrigerant) along a flowpath from a suction plenum 40 to a discharge plenum 42 .
- a working fluid e.g., a refrigerant
- the suction plenum 40 is located within an upstream end of the rotor case 34 and the discharge plenum is located generally within a discharge case 46 separated from the rotor case by a bearing case 48 and having a generally downstream-convergent interior surface 49 .
- a bearing cover/retainer plate 50 is mounted to a downstream end of the bearing case 48 to retain the bearing stacks.
- Downstream of the discharge case 46 is a muffler 52 in a muffler case 54 .
- Downstream of the muffler 52 is an oil separator unit 60 having a case 62 containing a separator mesh 64 .
- An oil return conduit 66 extends from the housing 62 to return oil stopped by the mesh 64 to a lubrication system (not shown).
- An outlet plenum 68 having an outlet port 69 is downstream of the mesh 64 .
- the exemplary muffler 52 includes annular inner and outer elements 70 and 72 separated by a generally annular space 74 (e.g., interrupted by support webs for retaining/positioning the inner element 70 ). These elements may be formed of sound absorption material (e.g., fiberglass batting encased in a nylon and steel mesh)
- the inner element 70 is retained and separated from the space 74 by an inner foraminate sleeve 76 (e.g., nylon or wire mesh or perforated/expanded metal sheeting) and the outer element 72 is similarly separated and retained by an outer foraminate sleeve 78 .
- the outer element 72 is encased within an outer sleeve 80 (e.g., similarly formed to the sleeves 76 and 78 ) telescopically received within the housing 54 .
- the sleeves 80 and 78 are joined at upstream and downstream ends by annular plates 82 and 84 .
- the upstream end of the sleeve 76 is closed by a circular plate 86 and the downstream end closed by an annular plate 90 .
- a non-foraminate central core 94 e.g., steel pipe
- compressed gas flow exits the compression pockets of the screw rotors 26 , 28 , 30 and flows into the discharge plenum 42 .
- the gas Upon exiting the compressor discharge plenum, the gas enters the muffler case 54 and flows down the annular space 74 .
- the gas flow which typically has entrained oil droplets, flows through the oil separating mesh 64 .
- the mesh 64 captures any oil entrained in the gas and returns it to the oil management system by means of the conduit 66 .
- the gas leaves the oil separating mesh and enters the plenum 68 and exits the outlet 69 toward the condenser (not shown).
- the compressor may be of an existing configuration although the principles of the invention may be applied to different configurations.
- a centerbody 120 is positioned in the flowpath between the rotors and the muffler.
- FIG. 2 shows the centerbody 120 having a generally frustoconical outer surface 122 extending from a circular upstream end/face 124 to a circular downstream face 126 .
- the exemplary centerbody 120 has an annular sidewall 128 having an inboard surface 130 and upstream and downstream end walls 132 and 134 having inboard surfaces 136 and 138 .
- the sidewall and end walls are spanned by a transverse wall 140 to create an exemplary two interior chambers 142 and 144 .
- the wall 140 has respective opposed surfaces 146 and 148 facing the chambers 142 and 144 .
- a single outlet port or passageway 150 and 152 extends through the sidewall 128 from the associated chamber 142 and 144 .
- the exemplary passageways 150 and 152 are of generally right circular cylindrical section characterized by a diameter, an associated cross-sectional area, and an associated length.
- FIG. 3 shows discharge ports 200 and 202 open to the outlet plenum 42 for discharging the compressed refrigerant.
- the centerbody ports 150 and 152 are (when viewed along and about the axis 500 ) respectively aligned with the positions of the axes 502 and 504 .
- the discharge ports 200 and 202 are oriented to direct the gas flow exiting the rotors to the discharge plenum 42 .
- the ports are located at the end of the compression pocket produced by the meshing between the male and female rotors. In a two-rotor configuration, only one discharge port would be required.
- the ports direct the flow around cavities containing the discharge bearings 36 and seals 38 . The cavities are enclosed by the bearing cover 50 .
- the centerbody may consist essentially of at least one of molded plastic (e.g., non-foam polypropylene or glass-filled nylon) or of polymeric foam or expanded bead material (e.g., molded in one or more pieces or cut from one or more pieces).
- molded plastic e.g., non-foam polypropylene or glass-filled nylon
- polymeric foam or expanded bead material e.g., molded in one or more pieces or cut from one or more pieces.
- the overall size and shape of the centerbody are chosen to provide a smooth transition from the discharge ports to the muffler.
- a streamwise variation in centerbody exterior cross-section e.g., a frustoconical taper
- the upstream/front face 124 may be sized to correspond to the inboard contours of the ports 200 and 202 defined by the plate 50 . This may be at a radius essentially equal to the root radius of the working portion of the rotor 26 .
- the downstream/aft face 126 may be dimensioned correspondingly to the inner element of the muffler (e.g., having a similar outer radius).
- the openings in the centerbody leading to the cavities are advantageously oriented normal to the local compressor discharge flow.
- the cavity volume and the number of cavities may be selected to address one or more particular sound frequencies.
- the first cavity 142 and passage 150 could be tuned for one frequency.
- the second cavity 144 and passage 152 could be tuned for a different frequency.
- the cavities within the centerbody are not limited to two. One or multiple could be provided. Further, the cavities could be filled fully or partially with sound absorption material, depending on the frequency of sound to be controlled.
- the volumes of the chambers 142 and 144 and the shape, cross-sectional areas, and lengths of the passageways 150 and 152 may be selected to provide advantageous sound suppression.
- the engineering and/or optimization of the resonator may be undertaken at a variety of levels from basic to detailed and may involve a variety of theoretical/simulation and/or practical/experimentation steps.
- Well-developed helmholtz resonator optimization techniques may be applied.
- the parameters may be optimized to provide maximum suppression at a particular target operating speed.
- the parameters may be optimized to provide a desired level of suppression over a desired range of speed or series of discrete speeds.
- the parameters may be optimized to provide desired suppression at non-target operating speeds which otherwise experience particularly significant resonance-associated noise.
- a target frequency may be calculated as a function of a target rotational speed and the rotor geometry—numbers of lobes/pockets).
- a first approximation of port size and volume size may be calculated based upon that target frequency and a prototype built. With the prototype, sound intensity at the target frequency may be measured. At least one parameter of the at least one internal volume or the at least one port may be selected/varied and the intensity remeasured in an iterative process to achieve a desired level of said intensity.
- the centerbody may be incorporated in the remanufacturing of a compressor or reengineering of a compressor configuration. In the reengineering or remanufacturing, various existing elements may be essentially preserved.
Abstract
A compressor includes a housing and one or more working elements. A muffler is located downstream of the discharge plenum and a helmholtz resonator is located in the discharge plenum upstream of the muffler.
Description
- The invention relates to compressors. More particularly, the invention relates to sound and vibration suppression in screw-type compressors.
- In positive displacement compressors, discrete volumes of gas are: trapped at a suction pressure; compressed; and discharged at a discharge pressure. The trapping and discharge each may produce pressure pulsations and related noise generation. Accordingly, a well developed field exists in compressor sound suppression.
- One class of absorptive mufflers involves passing the refrigerant flow discharged from the compressor working elements through an annular space between inner and outer annular layers of sound absorptive material (e.g., fiber batting or foam). U.S. Patent Application Pub. No. 2004/0065504 A1 discloses a basic such muffler and then improved versions having integral helmholtz resonators formed within the inner layer. The disclosure of this '504 publication is incorporated by reference herein as if set forth at length.
- Commonly owned and concurrently filed U.S. patent application docket 04-331, entitled Compressor Sound Suppression discloses a discharge plenum centerbody and methods for configuring such a centerbody. The disclosure of that application is incorporated by reference herein as if set forth at length.
- One aspect of the invention involves a compressor including a housing and one or more working elements. A muffler is located downstream of the discharge plenum and a helmholtz resonator is located in the discharge plenum upstream of the muffler.
- The helmholtz resonator may be formed in a centerbody between a bearing case and an inner element of the muffler. The helmholtz resonator may be added in a redesign or reengineering of an existing compressor configuration and/or a remanufacturing of an existing compressor previously lacking such a resonator. During the redesign/reengineering, parameters of the resonator may be optimized to provide a desired degree of suppression of a desired target type of vibration. The resonator may limit external sound radiated by the discharge housing and downstream piping due to resonating of discharge pulsation from the one or more working elements
- The details of one or more embodiments of the invention are set forth in the accompanying drawings and the description below. Other features, objects, and advantages of the invention will be apparent from the description and drawings, and from the claims.
-
FIG. 1 is a longitudinal sectional view of a compressor. -
FIG. 2 is an enlarged view of a discharge plenum of the compressor ofFIG. 1 . -
FIG. 3 is a sectional view of the compressor ofFIG. 1 taken along line 3-3. -
FIG. 4 is a sectional view of the compressor ofFIG. 1 taken along line 4-4. - Like reference numbers and designations in the various drawings indicate like elements.
-
FIG. 1 shows acompressor 20 having a housing orcase assembly 22. The exemplary compressor is a three-rotor, screw-type, hermeticcompressor having rotors longitudinal axes first rotor 26 is a male-lobed rotor driven by a coaxialelectric motor 32 and, in turn, enmeshed with and driving the female-lobed rotors male rotor axis 500 also forms a central longitudinal axis of thecompressor 20 as a whole. The rotor working portions are located within arotor case segment 34 of thecase assembly 22 and may be supported bybearings 36 and sealed byseals 38 engaging rotor shafts at each end of the associated rotor working portion. When driven by themotor 32, the rotors pump and compress a working fluid (e.g., a refrigerant) along a flowpath from asuction plenum 40 to adischarge plenum 42. In the exemplary embodiment, thesuction plenum 40 is located within an upstream end of therotor case 34 and the discharge plenum is located generally within adischarge case 46 separated from the rotor case by abearing case 48 and having a generally downstream-convergentinterior surface 49. In the exemplary embodiment, a bearing cover/retainer plate 50 is mounted to a downstream end of thebearing case 48 to retain the bearing stacks. Downstream of thedischarge case 46 is amuffler 52 in amuffler case 54. Downstream of themuffler 52 is anoil separator unit 60 having acase 62 containing aseparator mesh 64. Anoil return conduit 66 extends from thehousing 62 to return oil stopped by themesh 64 to a lubrication system (not shown). Anoutlet plenum 68 having anoutlet port 69 is downstream of themesh 64. - The
exemplary muffler 52 includes annular inner andouter elements inner element 70 is retained and separated from thespace 74 by an inner foraminate sleeve 76 (e.g., nylon or wire mesh or perforated/expanded metal sheeting) and theouter element 72 is similarly separated and retained by an outerforaminate sleeve 78. In the exemplary embodiment, theouter element 72 is encased within an outer sleeve 80 (e.g., similarly formed to thesleeves 76 and 78) telescopically received within thehousing 54. Thesleeves annular plates sleeve 76 is closed by acircular plate 86 and the downstream end closed by anannular plate 90. In the exemplary embodiment, a non-foraminate central core 94 (e.g., steel pipe) extends through theinner element 70 and protrudes beyond a downstream end thereof. - In operation, compressed gas flow exits the compression pockets of the
screw rotors discharge plenum 42. Upon exiting the compressor discharge plenum, the gas enters themuffler case 54 and flows down theannular space 74. Upon exiting the muffler the gas flow, which typically has entrained oil droplets, flows through the oil separatingmesh 64. Themesh 64 captures any oil entrained in the gas and returns it to the oil management system by means of theconduit 66. The gas leaves the oil separating mesh and enters theplenum 68 and exits theoutlet 69 toward the condenser (not shown). - As so far described, the compressor may be of an existing configuration although the principles of the invention may be applied to different configurations.
- According to the present invention, a
centerbody 120 is positioned in the flowpath between the rotors and the muffler.FIG. 2 shows thecenterbody 120 having a generally frustoconicalouter surface 122 extending from a circular upstream end/face 124 to a circulardownstream face 126. Theexemplary centerbody 120 has anannular sidewall 128 having aninboard surface 130 and upstream anddownstream end walls inboard surfaces transverse wall 140 to create an exemplary twointerior chambers wall 140 has respectiveopposed surfaces chambers passageway sidewall 128 from theassociated chamber exemplary passageways -
FIG. 3 showsdischarge ports outlet plenum 42 for discharging the compressed refrigerant. In the exemplary embodiment, thecenterbody ports axes discharge ports discharge plenum 42. The ports are located at the end of the compression pocket produced by the meshing between the male and female rotors. In a two-rotor configuration, only one discharge port would be required. The ports direct the flow around cavities containing thedischarge bearings 36 andseals 38. The cavities are enclosed by the bearingcover 50. - Various materials and techniques may be used to manufacture the centerbody. The centerbody may consist essentially of at least one of molded plastic (e.g., non-foam polypropylene or glass-filled nylon) or of polymeric foam or expanded bead material (e.g., molded in one or more pieces or cut from one or more pieces).
- In the exemplary embodiment, the overall size and shape of the centerbody are chosen to provide a smooth transition from the discharge ports to the muffler. For example, a streamwise variation in centerbody exterior cross-section (e.g., a frustoconical taper) may be selected to limit a pressure drop across the discharge plenum between the rotors and the muffler. Accordingly, the upstream/
front face 124 may be sized to correspond to the inboard contours of theports plate 50. This may be at a radius essentially equal to the root radius of the working portion of therotor 26. - Similarly, the downstream/
aft face 126 may be dimensioned correspondingly to the inner element of the muffler (e.g., having a similar outer radius). The openings in the centerbody leading to the cavities are advantageously oriented normal to the local compressor discharge flow. The cavity volume and the number of cavities may be selected to address one or more particular sound frequencies. For example thefirst cavity 142 andpassage 150 could be tuned for one frequency. Thesecond cavity 144 andpassage 152 could be tuned for a different frequency. Also the cavities within the centerbody are not limited to two. One or multiple could be provided. Further, the cavities could be filled fully or partially with sound absorption material, depending on the frequency of sound to be controlled. - The volumes of the
chambers passageways - For example, a target frequency may be calculated as a function of a target rotational speed and the rotor geometry—numbers of lobes/pockets). A first approximation of port size and volume size may be calculated based upon that target frequency and a prototype built. With the prototype, sound intensity at the target frequency may be measured. At least one parameter of the at least one internal volume or the at least one port may be selected/varied and the intensity remeasured in an iterative process to achieve a desired level of said intensity.
- The centerbody may be incorporated in the remanufacturing of a compressor or reengineering of a compressor configuration. In the reengineering or remanufacturing, various existing elements may be essentially preserved.
- One or more embodiments of the present invention have been described. Nevertheless, it will be understood that various modifications may be made without departing from the spirit and scope of the invention. For example, in a reengineering or remanufacturing situation, details of the existing compressor may particularly influence or dictate details of the implementation. Accordingly, other embodiments are within the scope of the following claims.
Claims (19)
1. A compressor comprising:
a housing;
a first rotor having a first rotational axis;
a second rotor having a second rotational axis and enmeshed with the first rotor;
a third rotor having a third rotational axis and enmeshed with the first rotor;
an outlet plenum;
a muffler downstream of the outlet plenum;
a centerbody within the outlet plenum and having:
an outer surface;
at least one internal volume; and
at least one port in the outer surface providing communication between the internal volume and an interior of the outlet plenum.
2. The compressor of claim 1 wherein:
the centerbody is coaxial with the first rotor.
3. The compressor of claim 1 wherein:
the centerbody outer surface is essentially frustoconical.
4. The compressor of claim 1 wherein:
a downstream portion of the centerbody has a diameter at least 10% greater than an upstream portion of the centerbody.
5. The compressor of claim 1 wherein:
the centerbody outer surface is essentially divergent in a direction toward the muffler.
6. The compressor of claim 1 wherein the centerbody consists essentially of at least one of molded plastic, polymeric foam, and expanded bead material.
7. The compressor of claim 1 having:
first and second such internal volumes; and
a first such port communicating with the first internal volume and a second such port communicating with the second internal volume.
8. The compressor of claim 7 wherein:
measured about the first axis, the first port is within 20° of the second axis; and
measured about the first axis, the second port is within 20° of the third axis.
9. The compressor of claim 7 wherein:
measured about the first axis, the first port is essentially aligned with the second axis; and
measured about the first axis, the second port is essentially aligned with the third axis.
10. The compressor of claim 7 wherein:
the first and second internal volumes and the first and second ports are effective to provide first and second helmholtz resonators.
11. A method for engineering the compressor of claim 1 comprising:
measuring sound intensity at a target frequency for pulsation; and
selecting at least one parameter of the at least one internal volume or the at least one port to achieve a desired level of said intensity.
12. A compressor comprising:
a housing;
a one or more working elements;
a discharge plenum;
a muffler downstream of the discharge plenum; and
a helmholtz resonator in the discharge plenum upstream of the muffler.
13. The compressor of claim 12 wherein:
the helmholtz resonator is in a centerbody, coaxial with the muffler.
14. A compressor comprising:
a housing;
a one or more working elements;
a discharge plenum;
a muffler downstream of the discharge plenum; and
means in the discharge plenum upstream of the muffler for limiting external sound radiated by the housing due to resonating of discharge pulsation from the one or more working elements.
15. A method for remanufacturing a compressor or reengineering a configuration of the compressor comprising:
providing an initial such compressor or configuration having:
a housing;
a first rotor having a first rotational axis;
a second rotor having a second rotational axis and enmeshed with the first rotor;
a third rotor having a third rotational axis and enmeshed with the first rotor; and
a discharge plenum; and
placing a helmholtz resonator in the discharge plenum.
16. The method of claim 15 wherein:
the placing, locates the helmholtz resonator in a centerbody upstream of a muffler.
17. The method of claim 15 wherein:
the placing, locates the helmholtz resonator in a centerbody upstream of a muffler and downstream of a bearing case element and coupling the bearing case element to the muffler.
18. The method of claim 15 wherein:
the placing, locates first and second such helmholtz resonators in a centerbody upstream of a muffler.
19. The method of claim 15 wherein:
the placing leaves the housing and the first, second, and third rotors essentially unchanged.
Priority Applications (11)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/956,509 US20060065478A1 (en) | 2004-09-30 | 2004-09-30 | Compressor sound suppression |
KR1020077006086A KR20070047353A (en) | 2004-09-30 | 2005-09-14 | Compressor sound suppression |
AU2005292436A AU2005292436A1 (en) | 2004-09-30 | 2005-09-14 | Compressor sound suppression |
BRPI0516759-0A BRPI0516759A (en) | 2004-09-30 | 2005-09-14 | compressor, method for building, remanufacturing or reengineering compressor configuration |
JP2007534631A JP2008514867A (en) | 2004-09-30 | 2005-09-14 | Compressor noise suppression |
CN2005800332010A CN101091060B (en) | 2004-09-30 | 2005-09-14 | Compressor sound suppression |
ES05797856.1T ES2565457T3 (en) | 2004-09-30 | 2005-09-14 | Compressor sound suppression |
CA002580518A CA2580518A1 (en) | 2004-09-30 | 2005-09-14 | Compressor sound suppression |
PCT/US2005/033086 WO2006039116A2 (en) | 2004-09-30 | 2005-09-14 | Compressor sound suppression |
EP05797856.1A EP1799973B1 (en) | 2004-09-30 | 2005-09-14 | Compressor sound suppression |
US12/144,839 US7993112B2 (en) | 2004-09-30 | 2008-06-24 | Compressor sound suppression |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/956,509 US20060065478A1 (en) | 2004-09-30 | 2004-09-30 | Compressor sound suppression |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/144,839 Continuation US7993112B2 (en) | 2004-09-30 | 2008-06-24 | Compressor sound suppression |
Publications (1)
Publication Number | Publication Date |
---|---|
US20060065478A1 true US20060065478A1 (en) | 2006-03-30 |
Family
ID=36097740
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/956,509 Abandoned US20060065478A1 (en) | 2004-09-30 | 2004-09-30 | Compressor sound suppression |
US12/144,839 Expired - Fee Related US7993112B2 (en) | 2004-09-30 | 2008-06-24 | Compressor sound suppression |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/144,839 Expired - Fee Related US7993112B2 (en) | 2004-09-30 | 2008-06-24 | Compressor sound suppression |
Country Status (10)
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---|---|
US (2) | US20060065478A1 (en) |
EP (1) | EP1799973B1 (en) |
JP (1) | JP2008514867A (en) |
KR (1) | KR20070047353A (en) |
CN (1) | CN101091060B (en) |
AU (1) | AU2005292436A1 (en) |
BR (1) | BRPI0516759A (en) |
CA (1) | CA2580518A1 (en) |
ES (1) | ES2565457T3 (en) |
WO (1) | WO2006039116A2 (en) |
Cited By (8)
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WO2008079131A1 (en) | 2006-12-26 | 2008-07-03 | Carrier Corporation | Screw compressor with integral bearing cover and discharge plenum divider |
WO2013139772A1 (en) * | 2012-03-20 | 2013-09-26 | Bitzer Kühlmaschinenbau Gmbh | Refrigerant compressor |
US20130280109A1 (en) * | 2010-09-23 | 2013-10-24 | Michael J. Lucas | Modular discharge silencer for vehicle-mounted compressor |
US20150337840A1 (en) * | 2014-05-22 | 2015-11-26 | Trane International Inc. | Compressor |
WO2016182873A1 (en) * | 2015-05-08 | 2016-11-17 | Danfoss Power Solutions Gmbh & Co. Ohg | Fluid working systems with compliance volume |
US9546660B2 (en) | 2014-06-02 | 2017-01-17 | Ingersoll-Rand Company | Compressor system with resonator |
US10890188B2 (en) | 2016-08-22 | 2021-01-12 | Trane International Inc. | Compressor noise reduction |
US11808264B2 (en) * | 2018-10-02 | 2023-11-07 | Carrier Corporation | Multi-stage resonator for compressor |
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WO2006043955A1 (en) | 2004-10-20 | 2006-04-27 | Carrier Corporation | Compressor sound suppression |
US8189851B2 (en) | 2009-03-06 | 2012-05-29 | Emo Labs, Inc. | Optically clear diaphragm for an acoustic transducer and method for making same |
JP6094236B2 (en) * | 2013-01-30 | 2017-03-15 | 株式会社デンソー | Compressor |
US20140270279A1 (en) | 2013-03-15 | 2014-09-18 | Emo Labs, Inc. | Acoustic transducers with releasable diaphram |
USD741835S1 (en) | 2013-12-27 | 2015-10-27 | Emo Labs, Inc. | Speaker |
USD733678S1 (en) | 2013-12-27 | 2015-07-07 | Emo Labs, Inc. | Audio speaker |
GB201402573D0 (en) * | 2014-02-13 | 2014-04-02 | J & E Hall Ltd | Discharge muffler |
RU2723469C2 (en) | 2015-08-11 | 2020-06-11 | Кэрриер Корпорейшн | Compressor, steam compression plant and methods of their operation and assembly |
RU2737072C2 (en) | 2015-08-11 | 2020-11-24 | Кэрриер Корпорейшн | Compressor, method of its use and steam compression system |
US10941776B2 (en) | 2015-10-02 | 2021-03-09 | Carrier Corporation | Screw compressor resonator arrays |
EP3542109B1 (en) | 2016-11-15 | 2020-07-08 | Carrier Corporation | Lubricant separator with muffler |
CN109386505B (en) | 2017-08-09 | 2022-02-11 | 开利公司 | Silencer for refrigerating device and refrigerating device |
CN107559205B (en) * | 2017-10-16 | 2024-01-30 | 珠海格力电器股份有限公司 | Bearing pedestal, screw compressor and air conditioner |
WO2020123273A1 (en) | 2018-12-10 | 2020-06-18 | Carrier Corporation | Modular compressor discharge system |
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- 2005-09-14 CA CA002580518A patent/CA2580518A1/en not_active Abandoned
- 2005-09-14 AU AU2005292436A patent/AU2005292436A1/en not_active Abandoned
- 2005-09-14 BR BRPI0516759-0A patent/BRPI0516759A/en not_active IP Right Cessation
- 2005-09-14 WO PCT/US2005/033086 patent/WO2006039116A2/en active Application Filing
- 2005-09-14 JP JP2007534631A patent/JP2008514867A/en not_active Withdrawn
- 2005-09-14 ES ES05797856.1T patent/ES2565457T3/en active Active
- 2005-09-14 KR KR1020077006086A patent/KR20070047353A/en not_active Application Discontinuation
- 2005-09-14 CN CN2005800332010A patent/CN101091060B/en not_active Expired - Fee Related
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2008
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---|---|---|---|---|
EP2097615A1 (en) * | 2006-12-26 | 2009-09-09 | Carrier Corporation | Screw compressor with integral bearing cover and discharge plenum divider |
EP2097615A4 (en) * | 2006-12-26 | 2013-02-13 | Carrier Corp | Screw compressor with integral bearing cover and discharge plenum divider |
WO2008079131A1 (en) | 2006-12-26 | 2008-07-03 | Carrier Corporation | Screw compressor with integral bearing cover and discharge plenum divider |
US20130280109A1 (en) * | 2010-09-23 | 2013-10-24 | Michael J. Lucas | Modular discharge silencer for vehicle-mounted compressor |
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US9546660B2 (en) | 2014-06-02 | 2017-01-17 | Ingersoll-Rand Company | Compressor system with resonator |
WO2016182873A1 (en) * | 2015-05-08 | 2016-11-17 | Danfoss Power Solutions Gmbh & Co. Ohg | Fluid working systems with compliance volume |
US11499552B2 (en) * | 2015-05-08 | 2022-11-15 | Danfoss Power Solutions Gmbh & Co. Ohg | Fluid working systems |
US11655816B2 (en) | 2015-05-08 | 2023-05-23 | Danfoss Power Solutions Gmbh & Co. Ohg | Fluid working systems |
US10890188B2 (en) | 2016-08-22 | 2021-01-12 | Trane International Inc. | Compressor noise reduction |
US11808264B2 (en) * | 2018-10-02 | 2023-11-07 | Carrier Corporation | Multi-stage resonator for compressor |
Also Published As
Publication number | Publication date |
---|---|
US20080260547A1 (en) | 2008-10-23 |
JP2008514867A (en) | 2008-05-08 |
EP1799973B1 (en) | 2016-03-09 |
WO2006039116A3 (en) | 2007-06-14 |
US7993112B2 (en) | 2011-08-09 |
CN101091060B (en) | 2013-03-27 |
AU2005292436A1 (en) | 2006-04-13 |
BRPI0516759A (en) | 2008-09-16 |
EP1799973A4 (en) | 2010-10-06 |
KR20070047353A (en) | 2007-05-04 |
ES2565457T3 (en) | 2016-04-04 |
EP1799973A2 (en) | 2007-06-27 |
WO2006039116A2 (en) | 2006-04-13 |
CN101091060A (en) | 2007-12-19 |
CA2580518A1 (en) | 2006-04-13 |
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Legal Events
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AS | Assignment |
Owner name: CARRIER CORPORATION, NEW YORK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ROCKWELL, DAVID M.;REEL/FRAME:015868/0532 Effective date: 20040930 |
|
STCB | Information on status: application discontinuation |
Free format text: EXPRESSLY ABANDONED -- DURING EXAMINATION |