EP4112933A1 - Refroidissement intégré d'un compresseur - Google Patents

Refroidissement intégré d'un compresseur Download PDF

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Publication number
EP4112933A1
EP4112933A1 EP21182863.7A EP21182863A EP4112933A1 EP 4112933 A1 EP4112933 A1 EP 4112933A1 EP 21182863 A EP21182863 A EP 21182863A EP 4112933 A1 EP4112933 A1 EP 4112933A1
Authority
EP
European Patent Office
Prior art keywords
compressor
compressor according
chamber
housing
working fluid
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.)
Withdrawn
Application number
EP21182863.7A
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 EP21182863.7A priority Critical patent/EP4112933A1/fr
Publication of EP4112933A1 publication Critical patent/EP4112933A1/fr
Withdrawn legal-status Critical Current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
    • F04B39/06—Cooling; Heating; Prevention of freezing
    • F04B39/064—Cooling by a cooling jacket in the pump casing
    • 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
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/08—Cooling; Heating; Preventing freezing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B31/00—Compressor arrangements
    • F25B31/006—Cooling of compressor or motor

Definitions

  • the current invention relates to a compressor with an integrated cooling, 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 heat up in particular due to the compressor work, which is transferred to and heats up the working fluid. This causes stress of the compressor.
  • a compressor comprising a housing forming at least one compressor chamber, wherein the compressor is configured to compress a working fluid contained in the at least one compressor chamber, wherein at least one part of the housing further comprises a cooling channel configured to contain a cooling fluid flowing through the cooling channel.
  • a compressor comprising an integrated cooling that is realised by a cooling channel that is provided in the housing, e.g. in at least a part of the housing wall.
  • the cooling fluid comprises a liquid, in particular water, a mixture of water or oil.
  • the cooling fluid preferably comprises a glycol-water mixture.
  • At least one part of the cooling channel extends around at least one part of the compressor chamber.
  • the housing comprises an inlet port and/or an outlet port that are/is flown around, at least partially, by the cooling fluid.
  • the cooling channel can extend around the inlet port and/or around the outlet port, preferably circularly.
  • the cooling channel can extend, preferably helically, along a flowing direction of the inlet port and/or the outlet port.
  • the ratio of the length of the inlet port and/or of the outlet port to the average width of the inlet port and/or of the outlet port is equal to or more than 1.
  • the inlet port and/or the outlet port preferably extend/extends in its flow direction at least as far as the diameter of the corresponding port. This leads to a design of the corresponding port, wherein an increased boundary surface of the ports to the cooling fluid in the cooling channel is provided.
  • the cooling fluid in particular flows by the boundary surface.
  • the cooling effect to the ports and/or to the working fluid is increased, since the cooling fluid is in contact with an increased boundary surface, whereby an increased amount of heat can be absorbed by the cooling fluid.
  • the compressor comprises a rotatable shaft, which is preferably provided in a cavity of the housing, and which is configured to move at least one compressing element of the compressor in the compressor chamber to compress the working fluid.
  • the compressing element preferably limits the compressor chamber and affects the volume of the compressor chamber according to its movement.
  • the shaft and the at least one compressing element are connected directly or via intermediate elements to each other to move the compressing element according to the rotation of the shaft.
  • the compressing element comprises a piston guided in the compressing chamber, wherein the piston limits the compressor chamber and wherein the piston is configured to be moved between a maximum lifting position and a minimum lifting position and wherein the volume of the compressor chamber is changed by the movement of the piston.
  • the compressor can be configured as a piston compressor, in particular a multi tumble piston compressor.
  • the compressing chamber is configured as a cylinder, wherein the cylinder is moved in the direction of the axis of the cylinder.
  • the piston comprises at least one inlet port configured to supply the working fluid to the compressor chamber, in particular from a cavity of the housing.
  • the cavity is preferably the same cavity the shaft is provided in.
  • the compressing element comprises an impeller wheel and/or a screw element.
  • the compressor comprises a pump configured to supply the cooling fluid to the cooling channel.
  • the pump can be driven by the shaft of the compressor or by another driving device.
  • the housing preferably comprises different materials.
  • a part of the housing that is only exposed to atmospheric pressure can comprise a lighter material compared to parts that are exposed to a pressure higher than atmospheric pressure.
  • the cooling channel is configured to adjust the temperature of the materials to adjust an equal thermal expansion of the materials. This increases advantageously the durability of the compressor.
  • the cooling channel is adjusted to cool working fluid that is intended to be supplied to and/or exhausted from the compressor chamber and/or that is contained in the compressor chamber.
  • this allows to reduce or to eliminate separate coolers for the working fluid.
  • the cooling channel can be designed as a heat exchanger the working fluid is guided through.
  • 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.
  • 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 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 housing 2 comprises an inlet port 5 and an outlet port 6, wherein non-compressed working fluid 7 can flow into the compressor chamber 3 and compressed working fluid can flow out of the compressor chamber 3. Valves or in general devices controlling the working fluid flowing through the ports 5, 6 are not shown to keep the drawing simple.
  • the housing 2 comprises a cavity formed as a cooling channel 4, extending around the compressor chamber 3 and the ports 5, 6.
  • a cooling fluid flows through the cooling channel 4 from the left to the right as indicated by the arrows.
  • the cooling fluid can comprise a liquid, in particular water or oil.
  • the compressor can further comprise a pump (not shown) configured to pump the cooling fluid through the cooling channel 4.
  • a pump configured to pump the cooling fluid through the cooling channel 4.
  • the pump is connected to the shaft but a separate driving device for the pump can be provided as well.
  • the part of the housing 2 forming the compressor chamber 3 is exposed to a pressure higher than atmospheric pressure due to the compression of the fluid in the compressor chamber 3. If the part of the housing 2 forming the compressor chamber 3 comprises a heavier or more durable material compared to other parts of the housing 2, which are e.g. only exposed to atmospheric pressure, mechanical tension due to different thermal expansion coefficients can be reduced by a design of the cooling channel 4 cooling the parts with the higher thermal expansion coefficient 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 ports 5, 6 are formed in such way that the ratio of the length (the extension in the up-down-direction) to the average width (the diameter when the cross section is a circle) of the ports 5, 6 is equal to or more than 1.
  • the cooling channel 4 can further be configured to extend along the ports 5, 6 and/or circular and/or helical around the ports 5, 6.
  • Fig. 3 shows a third 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 housing 2 of this embodiment does not comprise an inlet port 5 as shown in Fig. 1 or Fig. 2 . Instead, an inlet port 11 is provided in the piston 1. Valves or in general devices controlling the working fluid flowing through the ports 6, 11 are not shown to keep the drawing simple.
  • working fluid can be supplied from a cavity 9 of the compressor into the compressor chamber 3.
  • the cavity 9 is identical to the cavity comprising the shaft, but other embodiments are possible comprising a separate cavity for supplying the working fluid to the compressing chamber 3.
  • the cavity 9 can act as a reservoir for the working fluid, wherein the piston 1 and optionally at least one further piston comprising an inlet port are provided. This allows the design of a compact compressor.
  • 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.
  • Fig. 2 concerning the shape or design of the ports 5, 6, can be related exclusively either to the inlet port 5 or to the outlet port 6 as well. The same applies to the design of the cooling channel 4.
  • 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)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Compressor (AREA)
EP21182863.7A 2021-06-30 2021-06-30 Refroidissement intégré d'un compresseur Withdrawn EP4112933A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21182863.7A EP4112933A1 (fr) 2021-06-30 2021-06-30 Refroidissement intégré d'un compresseur

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21182863.7A EP4112933A1 (fr) 2021-06-30 2021-06-30 Refroidissement intégré d'un compresseur

Publications (1)

Publication Number Publication Date
EP4112933A1 true EP4112933A1 (fr) 2023-01-04

Family

ID=76730417

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21182863.7A Withdrawn EP4112933A1 (fr) 2021-06-30 2021-06-30 Refroidissement intégré d'un compresseur

Country Status (1)

Country Link
EP (1) EP4112933A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3307453A (en) * 1964-02-26 1967-03-07 Svenska Rotor Maskiner Ab Screw rotor machines for expanding a gaseous working medium of high temperature
US5694780A (en) * 1995-12-01 1997-12-09 Alsenz; Richard H. Condensed liquid pump for compressor body cooling
US6247901B1 (en) * 1997-02-17 2001-06-19 Hans Unger Compressor for generating compressed air in motor vehicles
US20100074779A1 (en) * 2006-09-08 2010-03-25 Knorr-Bremse Systeme fuer Nutzfahhrzeuge GmbH Air Compressor Having a Cast Aluminum Crankcase
US8117960B2 (en) * 2005-12-13 2012-02-21 Knorr-Bremse Systeme Fur Nutzfahrzeuge Gmbh Water-cooled piston compressor
US20170058889A1 (en) * 2015-08-31 2017-03-02 Bendix Commercial Vehicle Systems Llc Lightweight compressor crankcase assembly and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3307453A (en) * 1964-02-26 1967-03-07 Svenska Rotor Maskiner Ab Screw rotor machines for expanding a gaseous working medium of high temperature
US5694780A (en) * 1995-12-01 1997-12-09 Alsenz; Richard H. Condensed liquid pump for compressor body cooling
US6247901B1 (en) * 1997-02-17 2001-06-19 Hans Unger Compressor for generating compressed air in motor vehicles
US8117960B2 (en) * 2005-12-13 2012-02-21 Knorr-Bremse Systeme Fur Nutzfahrzeuge Gmbh Water-cooled piston compressor
US20100074779A1 (en) * 2006-09-08 2010-03-25 Knorr-Bremse Systeme fuer Nutzfahhrzeuge GmbH Air Compressor Having a Cast Aluminum Crankcase
US20170058889A1 (en) * 2015-08-31 2017-03-02 Bendix Commercial Vehicle Systems Llc Lightweight compressor crankcase assembly and method

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