EP3578755B1 - Drehmaschine - Google Patents

Drehmaschine Download PDF

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Publication number
EP3578755B1
EP3578755B1 EP18382387.1A EP18382387A EP3578755B1 EP 3578755 B1 EP3578755 B1 EP 3578755B1 EP 18382387 A EP18382387 A EP 18382387A EP 3578755 B1 EP3578755 B1 EP 3578755B1
Authority
EP
European Patent Office
Prior art keywords
conduct
damping
noise reduction
rotary machine
pump chamber
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.)
Active
Application number
EP18382387.1A
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English (en)
French (fr)
Other versions
EP3578755A1 (de
EP3578755C0 (de
Inventor
Jorge TROBAJO SAN MARTÍN
María VILLANUEVA MADOZ
Ana MAISTERRA MILLO
Francisco Javier SANZ LARRAURI
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.)
Entecnia Consulting SLU
Original Assignee
Entecnia Consulting SLU
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 Entecnia Consulting SLU filed Critical Entecnia Consulting SLU
Priority to EP18382387.1A priority Critical patent/EP3578755B1/de
Priority to ES18382387T priority patent/ES2953294T3/es
Priority to CN201810730552.6A priority patent/CN110552882B/zh
Publication of EP3578755A1 publication Critical patent/EP3578755A1/de
Application granted granted Critical
Publication of EP3578755B1 publication Critical patent/EP3578755B1/de
Publication of EP3578755C0 publication Critical patent/EP3578755C0/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • 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
    • 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
    • F04C18/30—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members
    • F04C18/34—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members
    • F04C18/344—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member
    • F04C18/3441—Rotary-piston pumps specially adapted for elastic fluids having the characteristics covered by two or more of groups F04C18/02, F04C18/08, F04C18/22, F04C18/24, F04C18/48, or having the characteristics covered by one of these groups together with some other type of movement between co-operating members having the movement defined in group F04C18/08 or F04C18/22 and relative reciprocation between the co-operating members with vanes reciprocating with respect to the inner member the inner and outer member being in contact along one line or continuous surface substantially parallel to the axis of rotation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F04C29/065—Noise dampening volumes, e.g. muffler chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
    • F04C29/06—Silencing
    • F04C29/068—Silencing the silencing means being arranged inside the pump housing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • 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
    • 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
    • F04C2220/00—Application
    • F04C2220/10—Vacuum
    • 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

Definitions

  • This invention belongs to the field of rotary machines and especially to pumps comprising a rotor with one or more vanes inserted in it, the rotor being contained in a housing where subspaces are created between the vane or vanes and the housing walls and the rotor when the rotor is moved.
  • pumps either a vacuum pump for magnifying the effect of a force or any other type of pump.
  • These pumps usually comprise a housing and a rotor housed inside the housing.
  • This rotor comprises one or more slots, so that a vane is at least partially introduced in each one of said slots.
  • the housing houses this rotor, but the inner volume of the housing is greater than the volume occupied by the rotor and the vanes.
  • the vanes have some space to exit the rotor due to centrifugal force or any other force provided in the pump.
  • This inner volume of the housing is designed such that the vane or vanes go in and out the rotor alternatively, in such a way that the sub-chambers which are created between two consecutive vanes and the corresponding portion of the housing wall and the rotor have a variable volume, depending on the position of the rotor.
  • the slot allows the single vane exiting the rotor in two diametrically opposed locations, so that the vane divides the main chamber in different sub-chambers.
  • a fluid inlet hole located in the chamber wall is in fluid connection with a device where reduction of pressure is desired and feeds the chamber in an inlet point with a compressible fluid, such as air or any other gas.
  • a compressible fluid such as air or any other gas.
  • a fluid outlet hole is in turn located in an outlet point of the chamber wall, and is in fluid connection with an outlet fluid zone, such as the atmosphere or a duct belonging to a different device. When the pressure in this outlet point is greater than the pressure in the outlet fluid zone, fluid exits the chamber.
  • This fluid pressure is different on each time instant, generating pressure waves with a certain frequency and amplitude. As the rotary velocity of the machine is high, these pressure waves cause a significant level of noise.
  • noise at high frequency of 1000Hz or more is considerably unpleasant to human listeners, and generation of such high-frequency noise may cause depreciation of a commercial value of any equipment.
  • product specifications include tight NVH requirements.
  • Noise reduction devices are known in the art, such as for example WO-2017/067819-A1 , WO-03046384-A1 , WO-14075660-A1 , WO-14075658-A2 , US-4,747,761-A .
  • the elements to mitigate the level of noise are assembled outside the rotary machine, resulting in an increasing of the installation space.
  • the invention provides a solution for this problem by means of a noise reduction device according to claim 1.
  • Preferred embodiments of the invention are defined in dependent claims.
  • a first aspect of the invention relates to a rotary machine comprising
  • the rotary machine comprises an intermediate conduct housed at least partially in the intermediate chamber for communicating the inlet port with the at least one inlet hole of the pump chamber.
  • the intermediate conduct leaves a free space inside the intermediate chamber and the noise reduction element is placed at least partially within a part of this free space.
  • the at least one outlet hole of the pump chamber opens into this free space of the intermediate chamber such that the compressed air exiting the pump chamber through the outlet hole enters the damping conduct of the noise reduction element.
  • the outlet hole can be placed preferably in the base of the pump chamber (when the base of the pump chamber is the upper base of the intermediate chamber the outlet hole is placed in the upper base.
  • the outlet hole is placed in the additional element and the upper base of the intermediate chamber comprises holes or openings in correspondence with the at least one outlet hole to allow the compressed air to pass towards the intermediate chamber).
  • the noise reduction element occupies only a part of the free space of the intermediate chamber.
  • the damping conduct comprises at least one outlet opening which opens to the free space of the intermediate chamber such that at least a part of the compressed air circulating inside the damping conduct discharges into the free space and enters the outlet port for exiting to an outside zone of the rotary machine.
  • the noise reduction element is configured (and mounted inside the intermediate chamber) such that an inlet opening of the damping conduct faces the outlet hole of the pump chamber providing a connection between the outlet hole and the inlet hole of the damping conduct.
  • the noise reduction element (or at least a part of the noise reduction element) can be place in contact with the base of the pump chamber or upper base of the intermediate chamber.
  • the noise reduction element comprises a protrusion (for example a cylindrical protrusion) surrounding the inlet opening of the damping conduct such that the protrusion connects directly with the outlet hole of the pump chamber. Thus the compressed air enters directly into the inlet opening of the damping conduct without passing through the free space of the intermediate chamber.
  • the noise reduction element defines an inlet first expansion space in the intermediate chamber in fluid communication with the outlet hole (in the base of the pump chamber or in the upper base of the intermediate chamber).
  • the damping conduct comprises at least an inlet opening placed in this inlet expansion space such that compressed air exiting from the pump chamber, through the outlet hole, opens and expands in the inlet expansion space and at least a part of this air (preferably most of it) enters the damping conduct through the inlet opening and then circulates inside the damping conduct.
  • the inlet expansion space is a substantially closed space defined between the noise reduction element and interior walls of the intermediate chamber such that the easiest exit way for the compressed air is through the damping conduct.
  • the noise reduction element comprises at least an outlet opening which opens to the free space of the intermediate chamber such that at least a part of the compressed air circulating inside the damping conduct discharges into the free space and enters the outlet port for exiting to an outside zone of the rotary machine.
  • the damping conduct can comprise several outlet openings.
  • the noise reduction element defines an outlet expansion space in the intermediate chamber in fluid communication with the outlet port.
  • the damping conduct comprises at least an outlet opening placed in the outlet expansion space such that the compressed air circulating inside the damping conduct discharges into the outlet expansion space and enters the outlet port for exiting to an outside zone of the rotary machine.
  • the outlet expansion space is a substantially closed space defined between the noise reduction element and interior walls of the intermediate chamber such that the easiest exit way for the compressed air is through the outlet port.
  • the noise reduction element comprises the outlet port such that the damping conduct discharges the compressed air directly to the outside zone without passing through the intermediate chamber.
  • the noise reduction element comprises a hole orthogonal to the damping conduct such that the compressed air is forced to change abruptly its direction (inside the damping conduct) to improve the noise reduction.
  • the noise reduction element comprises an internal expansion area with a cross section greater than the cross section of the damping conduct such that the compressed air suffers an expansion inside the damping conduct to improve the noise reduction.
  • the damping conduct can be a serpentine or labyrinth conduct.
  • the noise reduction element can comprise several walls defining the labyrinth conduct.
  • the damping conduct (for example part of the walls defining a labyrinth conduct) is mounted or integrated at least partially in the base of the pump chamber or upper base of the intermediate chamber and housed in the intermediate chamber.
  • the damping conduct is placed in a side of this base which is opposite to the pump chamber and faces (and housed in) the intermediate chamber.
  • the damping conduct (for example part of the walls defining a labyrinth conduct) is mounted or integrated at least partially in the base of the motor.
  • the damping conduct is placed in a side of this base of the motor which is opposite to the motor and faces (and housed in) the intermediate chamber.
  • a first part of the walls is integrated in the base of the pump chamber or upper base of the intermediate chamber and a second part of the walls is integrated in the base of the motor, for defining a labyrinth path.
  • the first part and second part of the walls defining the labyrinth conduct can also be mounted or attached to the upper base and base of the motor respectively.
  • the noise reduction element can comprises a noise damping material, for example a plastic material or a foam material.
  • the rotary machine of the invention comprises several advantages and/or differences compared with previous devices:
  • Figures 1A, 1B and 1C show a rotary machine according to the invention comprising a pump chamber 1 defined by a base 11 and a cap comprising a cover 12 and a lateral wall 13, the pump chamber 1 housing a rotor 14.
  • This rotor 14 comprises at least one slot 141 and at least one vane 142 being at least partially introduced in the slot 141 of the rotor 14.
  • the lateral wall and cover has been partially removed for clarity.
  • the rotary machine also comprises an electric motor 2, having a drive shaft 3 to drive the rotor 14, and an intermediate chamber 4 between the base 11 of the pump chamber 1 and the motor 2.
  • the intermediate chamber 4 comprises an upper base which defines the base 11 of the pump chamber 1 and a lateral wall 41, the intermediate chamber 4 being closed by a base 21 of the motor 5.
  • the base 11 of the pump chamber 1 can be a separate element (for example a sheet or plate) attached or mounted upon the upper wall of the intermediate chamber 4.
  • the base 11 can also make up the upper base of the intermediate chamber.
  • the rotary machine comprises at least one inlet port 5 for sucking air from another device (not shown).
  • the inlet port 5 is connected to the lateral wall 41 of the intermediate chamber 4 and is in fluid communication with at least an inlet hole 15 of the pump chamber 1, through an intermediate conduct 51 housed at least partially in the intermediate chamber 4.
  • the inlet hole 15 can be placed in the base 11 of the pump chamber 1.
  • the intermediate conduct 51 is completely housed inside the intermediate chamber 4 as represented in figures 1 , 2 or 3 .
  • the inlet hole can also be placed in the cover 12 of the pump chamber 1 in which case a first part 511 of the intermediate conduct 51 is housed in the intermediate chamber 4 as represented in figures 4 , 5 , 6 , 7 and 8 and a second part (not represented) exists outside the intermediate chamber 4 to connect with the inlet hole 15 of the pump chamber 1.
  • the rotary machine also comprises at least one outlet port 6 in fluid communication with an outside zone of the rotary machine.
  • This outlet port 6 is connected to this intermediate chamber 4 for discharging compressed air exiting the pump chamber 1 through at least one outlet hole 16 in the upper base of the intermediate chamber 4 which constitutes the base 11 of the pump chamber 1.
  • the rotary machine comprises also a noise reduction element 7 comprising at least one damping conduct 71 intended to reduce the sound pressure level of the compressed air exiting the pump chamber 1.
  • This noise reduction element 7 is placed in a free space 410 in the intermediate chamber 4, as can be seen for example in figure 1B .
  • the noise reduction element 7 occupies only a part of the free space 410 of the intermediate chamber 4.
  • the height of the noise reduction element 7 is substantially equal to the internal space height of the intermediate chamber 4 (the heights are measured in the direction of the rotor axis).
  • the intermediate conduct 51 has been represented completely housed in the intermediate chamber 4, connecting the inlet port 5 with an inlet hole 15 housed in the base 11 of the pump chamber 1.
  • Figures 2A, 2B and 2C show an embodiment of the noise reduction 7 configured to define an inlet expansion space 411 in the intermediate chamber 4, this inlet expansion space 411 being placed in the intermediate chamber 4 such as to be in fluid communication with the outlet hole 16 of the pump chamber 1.
  • this inlet expansion space 411 is placed beneath and facing the outlet hole 16 such that the outlet hole 16 opens directly in this inlet expansion space 411.
  • the damping conduct 71 of the noise reduction element 7 comprises at least an inlet opening 711 placed in this inlet expansion space 411 such that at least a part the compressed air exiting from the pump chamber 1, through the outlet hole 16, opens and expands in the inlet expansion space 411 and enters the damping conduct 71 through the inlet opening 711 and then circulates inside the damping conduct 71.
  • the inlet expansion space 411 is a substantially closed space defined between a recess 72 of the noise reduction element 7 and an inner tubular protuberance 42 of the intermediate chamber 4 such that the easiest exit way for the compressed air exiting the pump chamber is through the damping conduct 71.
  • the noise reduction element 7 comprises a plurality of outlet openings 712 which open to the free space 410 of the intermediate chamber 4 such that the compressed air circulating inside the damping conduct 71 discharges into the free space 410 and enters the outlet port 6 for exiting to an outside zone of the rotary machine.
  • the noise reduction element 7 is configured to define an outlet expansion space 412 in the intermediate chamber 4 in fluid communication with the outlet port 6.
  • the outlet expansion space 412 is a substantially closed space defined between an external wall of the noise reduction element 7 and an outer protuberance 43 of the intermediate chamber 4, this outlet expansion space 412 being placed over and facing the outlet port 6.
  • the damping conduct 71 comprises at least an outlet opening 713 placed in this outlet expansion space 412 such that a part of the compressed air circulating inside the damping conduct 71 discharges into the outlet expansion space 412 and enters the outlet port 6 for exiting to an outside zone of the rotary machine.
  • the damping conduct comprises also a plurality of outlet openings 712 opening to the free space 410 of the intermediate chamber 4 such that a part of the compressed air circulating inside the damping conduct 71 discharges into the free space 410 and enters the outlet port 6 for exiting to an outside zone of the rotary machine.
  • the noise reduction element 7 comprises a vertical hole 714 orthogonal to the damping conduct 71 such that the compressed air is forced to change abruptly its direction (inside the noise reduction element 7) to improve the noise reduction.
  • the noise reduction element 7 comprises an internal expansion area 715 with a cross section greater than the cross section of the damping conduct 71 such that the compressed air suffers an expansion inside the damping conduct 71 to improve the noise reduction, as shown in figure 2G .
  • Figures 3A and 3B show another embodiment for the noise reduction 7.
  • the noise reduction element 7 comprises a cylindrical protrusion 73 surrounding the inlet opening 711 of the damping conduct 71 such that the protrusion 73 connects directly with the outlet hole 16 of the pump chamber 1.
  • the height of the noise reduction element 7 can be smaller than the internal space height of the intermediate chamber 4 (the heights are measured in the direction of the rotor axis).
  • the compressed air exiting the pump chamber 1 enters directly into the inlet opening 711 of the damping conduct 71 without passing through the free space 410 of the intermediate chamber 4.
  • the damping conduct 71 comprises also a plurality of outlet openings 712 opening to the free space 410 of the intermediate chamber 4 such the compressed air circulating inside the damping conduct 71 discharges into the free space 410 and afterwards enters the outlet port 6 for exiting to an outside zone of the rotary machine.
  • the noise reduction element 7 is configured and mounted in the intermediate chamber 4 such that an inlet opening 711 of the damping conduct 71 faces the outlet hole 16 of the pump chamber 1 establishing a connection between the outlet hole 16 and the inlet opening 711 of the damping conduct 71.
  • the noise reduction element 7 (or at least a part of the noise reduction element) can be in contact with the base of the pump chamber 1.
  • the noise reduction element 7 comprises the outlet port 6 such that the damping conduct 71 discharges the compressed air directly to the outside zone without passing through the free space 410 of the intermediate chamber 4 .
  • Figures 5A and 5B show an embodiment of a noise reduction element 7 which occupies all the free space 410 of the intermediate chamber 4.
  • the noise reduction element 7 is configured and mounted in the intermediate chamber 4 such that an inlet opening 711 of the damping conduct 71 faces the outlet hole 16 of the pump chamber 1 establishing a connection between the outlet hole 16 and the inlet opening 711 of the damping conduct 71.
  • the noise reduction element 7 comprises the outlet port 6 such that the damping conduct 71 discharges the compressed air directly to the outside zone without passing through the free space 410 of the intermediate chamber 4.
  • the damping conduct 71 is a labyrinth conduct.
  • the noise reduction element 7 comprises several walls 74 defining the labyrinth conduct. These walls 74 are mounted on the base 21 of the motor 2.
  • Figure 6C shows the path followed by the compressed air between a beginning point 741 of the labyrinth, in communication with the outlet hole 16 of the pump chamber, and a finishing point 742 of the labyrinth in communication with the outlet port 6.
  • the noise reduction element 7 comprises the outlet port 6 such that the damping conduct 71 discharges the compressed air directly to the outside zone without passing through the intermediate chamber 4.
  • FIG. 7A and 7B shows a noise reduction element 7 comprising several walls 74 defining the labyrinth conduct. These walls 74 are mounted or integrated in the upper wall of the intermediate chamber 4 and housed in the intermediate chamber 4.
  • Figure 7B shows the path followed by the compressed air between a beginning point 741 of the labyrinth, in communication with the outlet hole16 of the pump chamber, and a finishing point 742 of the labyrinth in communication with the outlet port 6.
  • the noise reduction element 7 comprises the outlet port 6 such that the damping conduct 71 discharges the compressed air directly to the outside zone without passing through the intermediate chamber 4.
  • the noise reduction element 7 comprises several walls 74 defining the labyrinth conduct.
  • a first part 743 of the walls is integrated on the upper wall of intermediate chamber 4 and a second part 744 of the walls is integrated on the base 21 of the motor 2.
  • Figure 7B shows the path followed by the compressed air between a beginning point 741 of the labyrinth, in communication with the outlet hole16 of the pump chamber, and a finishing point 742 of the labyrinth in communication with the outlet port 6.
  • the noise reduction element 7 comprises the outlet port 6 such that the damping conduct 71 discharges the compressed air directly to the outside zone without passing through the intermediate chamber 4.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Applications Or Details Of Rotary Compressors (AREA)
  • Rotary Pumps (AREA)
  • Centrifugal Separators (AREA)
  • Glass Compositions (AREA)

Claims (15)

  1. Rotierende Maschine mit
    einer Pumpkammer (1) mit einer Basis (11), einer Abdeckung (12) und einer Seitenwand (13, die einen Innenraum definieren,
    einem Rotor (14), der in dem Innenraum der Pumpkammer (1) untergebracht ist, wobei der Rotor (14) mindestens einen Schlitz (141) aufweist,
    mindestens einen Drehschieber (142), wobei jeder Drehschieber (142) zumindest teilweise in einen Schlitz (141) des Rotors (14) eingeführt ist,
    einem elektrischen Motor (2) mit einer Antriebswelle (3), die durch eine zentrale Öffnung der Basis (11) hindurchtritt, um den Rotor (14) anzutreiben,
    mindestens einem Einlasskanal (5) zum Ansaugen von Luft von einer Einrichtung, wo Druck abzusenken ist, wobei der Einlasskanal in Fluidkommunikation mit mindestens einem Einlassloch (15) der Pumpkammer (1) steht,
    mindestens einem Auslasskanal (6) in Fluidkommunikation mit einer Umgebung der rotierenden Maschine zum Ablassen von verdichteter Luft, die aus der Pumpkammer (1) durch mindestens ein Auslassloch (16) der Pumpkammer (1) austritt,
    einem Schallreduktionselement (7), das mindestens eine Dämpfungsleitung (71) aufweist, die dazu vorgesehen ist, das Schalldruckpegel der verdichteten Luft zu reduzieren,
    einer Zwischenkammer (4) zwischen der Basis (11) der Pumpkammer (1) und dem Motor (2), wobei der Einlasskanal (5) und der Auslasskanal (6) an diese Zwischenkammer (4) angeschlossen sind,
    dadurch gekennzeichnet, dass die rotierende Maschine zum Verbinden des Einlasskanals (5) mit mindestens einem Einlassloch (15) der Pumpkammer eine Zwischenleitung (51) aufweist, die zumindest teilweise in der Zwischenkammer (4) angeordnet ist, wobei die Zwischenleitung (51) einen Freiraum in der Zwischenkammer (4) belässt und das Schallreduktionselement (7) zumindest teilweise innerhalb eines Teil dieses Freiraums (410) angeordnet ist und wobei sich das mindestens eine Auslassloch (16) derart in diesen Freiraum (410) der Zwischenkammer (4) öffnet, dass die verdichtete Luft, die die Pumpkammer (1) durch das Auslassloch (16) verlässt, in die Dämpfungsleitung (71) des Schallreduktionselements (7) eintritt.
  2. Rotierende Maschinen an Anspruch1, wobei das Schallreduktionselement (7) mindestens eine Auslassöffnung (712) aufweist, die sich derart zu dem Freiraum (41) der Zwischenkammer (4) öffnet, dass mindestens ein Teil der verdichteten Luft, die innerhalb der Dämpfungsleitung (71) zirkuliert, in den Freiraum (410) ausströmt und in den Auslasskanal (6) eintritt, um in eine Umgebung der rotierenden Maschine auszutreten.
  3. Rotierende Maschine nach einem der vorhergehenden Ansprüche, wobei das Schallreduktionselement (7) derart ausgebildet ist, dass eine Einlassöffnung (711) der Dämpfungsleitung (71) dem Auslassloch (16) der Pumpkammer gegenüberliegt, was eine Verbindung zwischen dem Auslassloch (16) und dem Einlassloch (15) herstellt.
  4. Rotierende Maschine nach Anspruch 3, wobei das Schallreduktionselement (7) einen Überstand (73) aufweist, der die Einlassöffnung (711) der Dämpfungsleitung (71) derart umgibt, dass der Überstand direkt an das Auslassloch (16) der Pumpkammer (1) anschließt.
  5. Rotierende Maschine nach Anspruch 1 oder 2, wobei das Schallreduktionselement (7) einen Einlassexpansionsraum (411) in der Zwischenkammer (4) in Fluidkommunikation mit dem Auslassloch (16) der Pumpkammer (1) definiert und wobei die Dämpfungsleitung (71) mindestens eine Einlassöffnung (711) aufweist, die derart in diesem Einlassexpansionsraum (411) angeordnet ist, dass die verdichtete Luft, die aus der Pumpkammer (1) durch das Auslassloch (16) austritt, in dem Einlassexpansionsraum (411) aufgeht und expandiert und mindestens ein Teil durch die Einlassöffnung (711) in die Dämpfungsleitung (71) eintritt und innerhalb der Dämpfungsleitung (71) zirkuliert.
  6. Rotierende Maschine nach einem der vorhergehenden Ansprüche, wobei das Schallreduktionselement (7) in der Zwischenkammer (4) einen Auslassexpansionsraum (412) in Fluidkommunikation mit dem Auslasskanal (6) definiert und wobei die Dämpfungsleitung (71) mindestens eine Auslassöffnung (713) aufweist, die derart in dem Auslassexpansionsraum (412) angeordnet ist, dass die verdichtete Luft, die innerhalb der Dämpfungsleitung (71) zirkuliert, in den Auslassexpansionsraum (412) ausströmt.
  7. Rotierende Maschine nach einem der vorhergehenden Ansprüche, wobei das Schallreduktionselement (7) ein Loch (714) orthogonal zu der Dämpfungsleitung (71) aufweist.
  8. Rotierende Maschine nach einem der vorhergehenden Ansprüche, wobei das Schallreduktionselement (7) einen inneren Expansionsbereich (715) mit einem Querschnitt größer als der Querschnitt der Dämpfungsleitung (71) aufweist.
  9. Rotierende Maschine nach einem der Ansprüche 1, 2, 3, 4, 5, 7 oder 8, wobei das Schallreduktionselement den Auslasskanal (6) aufweist.
  10. Rotierende Maschine nach einem der vorhergehenden Ansprüche, wobei die Dämpfungsleitung (71) zumindest teilweise in die Basis (11) der Pumpkammer (1) oder eine obere Basis der Zwischenkammer (4) montiert oder integriert ist und in der Zwischenkammer (4) untergebracht ist.
  11. Rotierende Maschine nach einem der vorhergehenden Ansprüche, wobei die Dämpfungsleitung (71) zumindest teilweise in einer Basis (21) des Motors (2) montiert oder integriert ist.
  12. Rotierende Maschine nach einem der vorhergehenden Ansprüche, wobei die Dämpfungsleitung (71) eine Schlangen- oder Labyrinthleitung aufweist.
  13. Rotierende Maschine nach Anspruch 12, wobei das Schallreduktionselement (7) mehrere Wandungen (74) aufweisen kann, die die Labyrinthleitung definieren.
  14. Rotierende Maschine nach Anspruch 13, wobei ein erster Teil (743) der Wandungen (74) in die Basis (11) der Pumpkammer (1) oder eine obere Basis der Zwischenkammer (4) integriert ist und in der Zwischenkammer (4) angeordnet ist und ein zweiter Teil (744) der Wandungen (74) in die Basis (21) des Motors (2) integriert ist.
  15. Rotierende Maschine nach einem der vorhergehenden Ansprüche, wobei das Schallreduktionselement ein schalldämpfendes Material aufweist.
EP18382387.1A 2018-06-04 2018-06-04 Drehmaschine Active EP3578755B1 (de)

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EP18382387.1A EP3578755B1 (de) 2018-06-04 2018-06-04 Drehmaschine
ES18382387T ES2953294T3 (es) 2018-06-04 2018-06-04 Máquina rotativa
CN201810730552.6A CN110552882B (zh) 2018-06-04 2018-07-05 旋转机器

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EP3578755B1 true EP3578755B1 (de) 2023-06-07
EP3578755C0 EP3578755C0 (de) 2023-06-07

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Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61291797A (ja) 1985-06-17 1986-12-22 Hitachi Ltd 回転ベ−ン式ポンプ
US6030191A (en) * 1997-08-20 2000-02-29 Delaware Capital Formation, Inc. Low noise rotary vane suction pump having a bleed port
DE10295529D2 (de) 2001-11-23 2004-10-28 Luk Automobiltech Gmbh & Co Kg Vakuumpumpe mit Schalldämpfungskammer
JP5632252B2 (ja) * 2010-10-20 2014-11-26 日信工業株式会社 負圧ポンプ
JP5939514B2 (ja) * 2012-01-27 2016-06-22 日信工業株式会社 負圧ポンプ
KR20150070320A (ko) 2012-11-19 2015-06-24 마그나 파워트레인 바트 홈부르크 게엠베하 자동차를 위한 진공 펌프
US20160201671A1 (en) 2012-11-19 2016-07-14 Magna Powertrain Bad Homburg GmbH Vacuum pump for a motor vehicle
DE102015118111A1 (de) 2015-10-23 2017-04-27 Hella Kgaa Hueck & Co. Elektrische Vakuumpumpe, insbesondere zur Anordnung in einem Fahrzeug

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CN110552882A (zh) 2019-12-10
ES2953294T3 (es) 2023-11-10
CN110552882B (zh) 2023-03-31
EP3578755C0 (de) 2023-06-07

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