EP4112931A1 - Réduction du bruit d'un compresseur - Google Patents

Réduction du bruit d'un compresseur Download PDF

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Publication number
EP4112931A1
EP4112931A1 EP21182870.2A EP21182870A EP4112931A1 EP 4112931 A1 EP4112931 A1 EP 4112931A1 EP 21182870 A EP21182870 A EP 21182870A EP 4112931 A1 EP4112931 A1 EP 4112931A1
Authority
EP
European Patent Office
Prior art keywords
compressor
reservoir
working fluid
compressor according
housing
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.)
Pending
Application number
EP21182870.2A
Other languages
German (de)
English (en)
Inventor
Yves Compera
Peter KOVACSIK
Kornel Kantor
Zoltan Laszlo VASS
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.)
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Original Assignee
Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
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 Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH filed Critical Knorr Bremse Systeme fuer Nutzfahrzeuge GmbH
Priority to EP21182870.2A priority Critical patent/EP4112931A1/fr
Priority to PCT/EP2022/065876 priority patent/WO2023274692A1/fr
Publication of EP4112931A1 publication Critical patent/EP4112931A1/fr
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0055—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes
    • F04B39/0061—Pulsation and noise damping means with a special shape of fluid passage, e.g. bends, throttles, diameter changes, pipes using muffler volumes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/0027—Pulsation and noise damping means
    • F04B39/0033—Pulsation and noise damping means with encapsulations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/121—Casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/123—Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B39/00—Component parts, details, or accessories, of pumps or pumping systems specially adapted for elastic fluids, not otherwise provided for in, or of interest apart from, groups F04B25/00 - F04B37/00
    • F04B39/12—Casings; Cylinders; Cylinder heads; Fluid connections
    • F04B39/128—Crankcases

Definitions

  • the current invention relates to a compressor with a noise reducing design, a pneumatic system and a vehicle with such a compressor.
  • Compressors in particular pneumatic compressors, are used for several vehicle applications.
  • compressors are used to supply a working fluid, such as air, to a system, in particular a pneumatic braking system, an air suspension, a container for compressed air and/or an air supply system for a fuel cell.
  • the compressor can produce noise in particular due to the suction of working fluid into the compressor or due to the vibration of the compressor housing.
  • a compressor comprising:
  • the working fluid contained in the compressor chamber is compressed by reducing the volume of the compressor chamber.
  • the compressor can comprise more than just one compressor chamber.
  • every compressor chamber is identical to the other(s).
  • each cylinder advantageously has the same shape.
  • one reservoir can be provided to store working fluid for each compressor chamber.
  • more than one reservoir can be provided, wherein working fluid is supplied to one or a few compressor chambers from one reservoir and wherein it is supplied to the other compressor chamber(s) from another reservoir.
  • the reservoir preferably acts as huge volume in comparison to the maximum volume of the compressor chamber.
  • the volume of the reservoir is ten times or more bigger than the volume of the maximum volume of the compressor chamber. Therefore, the amount of working fluid supplied to the compressor chamber is 10% or less of the volume of the reservoir. Accordingly, a pressure impulse caused by the supplying of the working fluid into the compressor chamber is damped. The damping effect is stronger the smaller the maximum volume of the compressor chamber is compared with the volume of the reservoir.
  • the at least one reservoir is provided in the housing and/or by a cavity of the housing.
  • the cavity of the housing can be configured for another purpose, such as for comprising further elements of the compressor like a shaft, bearings or a control unit, such as an ECU.
  • the working fluid contained in the reservoir can act as a cooling fluid for these elements.
  • the at least one reservoir communicates directly or via intermediate elements with the atmosphere.
  • air is contained in the reservoir.
  • the reservoir is in communication to a source for working fluid.
  • the reservoir preferably comprises an inlet port to be supplied with air from the atmosphere.
  • an air dryer or humidifier a valve and/or a throttle can be provided.
  • the at least one reservoir is configured as or comprises a silencer.
  • the reservoir can comprise or be configured as a quarter-wave tube for reducing resonance effects and therefore for reducing noise.
  • the silencer or the quarter-wave tube can be provided on the inlet port of the reservoir to reduce noise from the inside of the reservoir.
  • the compressor preferably comprises at least one compressing element in the compressor chamber to compress the working fluid.
  • the at least one compressing element is configured
  • the compressor comprises a rotatable shaft, which is preferably provided in a cavity of the housing, and which is configured to move the least one compressing element.
  • the compressing element comprises a piston guided in the compressor chamber, wherein the piston limits the compressor chamber, wherein the piston is configured to be moved between a maximum lifting position and a minimum lifting position, wherein the movement of the piston changes the volume of the compressor chamber.
  • the compressor chamber acts as a cylinder, wherein the piston is movable along the axis of the cylinder.
  • the compressor is preferably configured as a piston compressor, in particular, a multi-tumble piston compressor.
  • the compressor preferably comprises at least two pistons guided in separate cylinders.
  • the cylinders are preferably arranged in an angular arrangement, in particular regularly spaced, to reduce vibration of the compressor.
  • the compressing element comprises an impeller wheel and/or a screw element.
  • the cavity comprising the shaft is configured as the at least one reservoir.
  • existing space in the housing can be used to store working fluid. Therefore, the size of the compressor can be reduced as there is no need for providing a separate reservoir.
  • the at least one reservoir is configured to guide working fluid flowing into the at least one reservoir in such way, that cooling of the shaft and/or bearings of the shaft is executed. If there is a permanent lubricant provided in the reservoir, for example in the bearings, cooling can avoid the lubricant to heat up too much and further to avoid the heated lubricant flowing out of the bearings or passing into the working fluid contained in the reservoir. Therefore, malfunction or damage of the compressor can be avoided.
  • the compressor comprises an outlet port configured to guide compressed working fluid out of the compressor chamber, wherein at least a part of the outlet port is configured as a part of the housing, in particular forming a stiffening rib, to stabilize the housing and/or to reduce vibration and therefore in particular noise.
  • This embodiment can also be realized as a separate or additional embodiment.
  • Providing an outlet port extending at least partially as a part of the housing can be provided at a compressor as described above or at another compressor that has at least the housing in common with the above described compressor.
  • the working fluid comprises air and further preferably, the compressor is configured to supply the working fluid to a pneumatic system, in particular a pneumatic braking system, an air suspension, a container for compressed air and/or an air supply system for a fuel cell.
  • a pneumatic system in particular a pneumatic braking system, an air suspension, a container for compressed air and/or an air supply system for a fuel cell.
  • the inlet port connecting the reservoir and the compressor chamber is preferably provided in the housing.
  • the inlet port can comprise an opening in the side face of the cylinder, wherein the opening communicates with the reservoir.
  • the inlet port is closed or disconnected from the compressor chamber when the piston moves up to the maximum lifting position and overruns the opening. Then the compressor chamber is closed and the working fluid is compressed due to the reducing volume of the compressor chamber.
  • the inlet port is provided in the compressing element.
  • the inlet port can comprise a through hole extending through the piston and connecting the compressor chamber to the reservoir.
  • the inlet port can further be configured as a self-closing inlet port, wherein the inlet port is closed due to the increasing pressure of the compressed working fluid when the piston is moved to the maximum lifting position.
  • the at least one reservoir comprises at least two containers to store the working fluid at least partially.
  • the at least two containers are in serial or in parallel communication with each other or in communication witch each other via the compressor chamber.
  • the at least two containers are preferably in communication with each other, wherein the at least two containers can be connected in serial and/or in parallel.
  • the serial connection between the at least two containers can be realized directly or via one or more intermediate elements.
  • an air dryer or humidifier a valve and/or a throttle can be provided.
  • a parallel connection between the at least two containers can be provided directly or via one or more intermediate elements.
  • an air dryer or humidifier a valve and/or a throttle can be provided.
  • the at least two containers can be configured to supply working fluid stored in the at least two containers separately to the compressor chamber via at least two separate inlet ports, accordingly.
  • At least one of the at least two containers can be configured as a part of the housing or be provided by a cavity of the housing.
  • each container of the at least two containers can be configured for damping an impulse caused by a particular resonance effect of the supplying of the working fluid into the compressor chamber.
  • a connection, in particular a serial connection, of the containers can be configured in such way, that a pressure impulse is continuously damped from one container to the next container.
  • a parallel connection causes advantageously a reduction of the flow resistance when working fluid is supplied to the compressor chamber.
  • a pneumatic system in particular a pneumatic braking system, an air suspension, a container for compressed air and/or an air supply system for a fuel cell, is provided.
  • This pneumatic system comprises a compressor as described above.
  • a vehicle in particular a commercial vehicle, is provided.
  • This vehicle comprises a compressor as described above or a pneumatic system as described above.
  • the compressor of the vehicle is configured to supply air to at least one of these systems of the vehicle:
  • the vehicle is configured as a commercial vehicle, a truck, a trailer, a bus, and/or a combination of a towing vehicle and a trailer.
  • the vehicle is configured as an electric, hybrid or conventional vehicle.
  • the vehicle can be driven by a fuel cell based system and/or by a battery system.
  • the compressor can act as an air supply unit, preferably exclusively, for a trailer, wherein the compressor is installed in the trailer or in a corresponding towing vehicle.
  • Fig. 1 shows a first embodiment of the invention. This embodiment refers to a piston compressor.
  • a housing 2 is shown in a sectional view comprising a piston 1 that is guided in the housing 2, in particular in a cylinder, and configured to be movable in a perpendicular direction between a maximum lifting position and a minimum lifting position as indicated by the double arrow in the drawing.
  • the piston 1 is moved generally according to the movement of a driving device (not shown) of the compressor.
  • the driving device comprises a rotatable shaft (not shown) provided in a cavity 9 of the housing 2, wherein the movement is transmitted to the piston 1 via a connection rod 10.
  • the housing 2 and the piston 1 form a compressor chamber 3 for compressing a working fluid, wherein the movement of the piston 1 adjusts the volume of the compressor chamber 3.
  • the cavity 9 acts as a reservoir 4 for the working fluid.
  • the working fluid is supplied to the reservoir 4 as indicated by the arrow 12.
  • air can be supplied to the reservoir.
  • the piston 1 comprises an inlet port 11 as a through-hole connecting the compressor chamber 3 and the reservoir 4.
  • the inlet port 11 is configured as a self-closing inlet port that closes due to increasing pressure in the compressor chamber when the piston 1 is moved to the maximum lifting position.
  • the housing 2 comprises an outlet port 6, wherein compressed working fluid can flow out of the compressor chamber 3 as indicated by the arrow 8. Valves or in general devices controlling the working fluid flowing through the ports 6, 11 are not shown to keep the drawing simple.
  • the compressor works as follows. When the piston 1 is moved to its minimum lifting position, the volume of the compressor chamber 3 is increased. Therefore, the pressure in the compressor chamber 3 is lower than the pressure in the reservoir 4. This leads to the opening of the inlet port 11 and therefore, working fluid flows from the reservoir 4 into the compressor chamber 3.
  • the volume of the reservoir 4 is more than ten times bigger than the volume of the compressor chamber 3 when the piston 1 is in its minimum lifting position. Accordingly, a pressure impulse caused by the supplying of the working fluid from the reservoir 4 into the compressor chamber 3 is damped as described in the general part of the description.
  • elements such as the shaft, bearings etc. contained in the reservoir 4 respectively in the cavity 9 can be cooled by the inflowing working fluid 12, which can be guided to the elements, accordingly.
  • Fig. 2 shows a second embodiment of the invention. As this embodiment is similar to the embodiment shown in Fig. 1 , only the differences thereto are explained in the following. Otherwise, reference is made to the description of Fig. 1 .
  • the piston 1 does not comprise an inlet port 11 as shown in Fig. 1 .
  • an inlet port 5 is provided in the housing 2 comprising a channel that is configured to provide a connection between the compressor chamber 3 and the reservoir 4.
  • the channel ends in a side face of the compressor chamber 3 and is located in such way that it is overrun by the piston 1 when the piston 1 is moved to the maximum lifting position.
  • the other end of the channel is permanently connected to the reservoir 4. In particular, it is located in such way, that it is not overrun by the piston 1 moving into the minimum lifting position.
  • the piston 1 To supply working fluid from the reservoir 4 to the compressor chamber 3, the piston 1 is moved down to its minimum lifting position. Thereby, the volume of the compressor chamber 3 is increased, causing a lower pressure in the compressor chamber 3 compared to the pressure in the reservoir 4. According to this pressure difference, working fluid is supplied through the inlet port 5 into the compressor chamber 3 as indicated by the arrows 7. When the piston 1 is then moved upwards to its maximum lifting position, the inlet port 5 is closed when it is overrun by the piston 1. From this moment on the compressor chamber 3 is closed and the working fluid contained therein is compressed according to the movement of the piston 1.
  • an embodiment can comprise an inlet port 11 and an inlet port 5, which are connected to the same or to different compressor chambers 3.
  • the working fluid comprises air and the compressors are configured for supplying the working fluid to a pneumatic system, in particular a pneumatic braking system, an air suspension, a container for compressed air and/or an air supply system for a fuel cell.
  • a pneumatic system in particular a pneumatic braking system, an air suspension, a container for compressed air and/or an air supply system for a fuel cell.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Compressor (AREA)
EP21182870.2A 2021-06-30 2021-06-30 Réduction du bruit d'un compresseur Pending EP4112931A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21182870.2A EP4112931A1 (fr) 2021-06-30 2021-06-30 Réduction du bruit d'un compresseur
PCT/EP2022/065876 WO2023274692A1 (fr) 2021-06-30 2022-06-10 Réduction du bruit d'un compresseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21182870.2A EP4112931A1 (fr) 2021-06-30 2021-06-30 Réduction du bruit d'un compresseur

Publications (1)

Publication Number Publication Date
EP4112931A1 true EP4112931A1 (fr) 2023-01-04

Family

ID=76730420

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21182870.2A Pending EP4112931A1 (fr) 2021-06-30 2021-06-30 Réduction du bruit d'un compresseur

Country Status (2)

Country Link
EP (1) EP4112931A1 (fr)
WO (1) WO2023274692A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101737296A (zh) * 2010-01-08 2010-06-16 浙江鸿友压缩机制造有限公司 低噪声结构无油空气压缩机
US20150204318A1 (en) * 2012-09-26 2015-07-23 Teijin Pharma Limited Compressor
EP3333422A2 (fr) * 2016-11-14 2018-06-13 LG Electronics Inc. Compresseur linéaire
EP3336355A1 (fr) * 2016-12-19 2018-06-20 Whirlpool S.A. Compresseur hermétique
DE102017104588A1 (de) * 2017-03-06 2018-09-06 Voith Patent Gmbh Zylinderkopf für eine Hubkolbenmaschine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101737296A (zh) * 2010-01-08 2010-06-16 浙江鸿友压缩机制造有限公司 低噪声结构无油空气压缩机
US20150204318A1 (en) * 2012-09-26 2015-07-23 Teijin Pharma Limited Compressor
EP3333422A2 (fr) * 2016-11-14 2018-06-13 LG Electronics Inc. Compresseur linéaire
EP3336355A1 (fr) * 2016-12-19 2018-06-20 Whirlpool S.A. Compresseur hermétique
DE102017104588A1 (de) * 2017-03-06 2018-09-06 Voith Patent Gmbh Zylinderkopf für eine Hubkolbenmaschine

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Publication number Publication date
WO2023274692A1 (fr) 2023-01-05

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