EP0130331B1 - Gasdynamischer Druckwellenlader für Fahrzeug-Verbrennungsmotoren - Google Patents

Gasdynamischer Druckwellenlader für Fahrzeug-Verbrennungsmotoren Download PDF

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Publication number
EP0130331B1
EP0130331B1 EP84105556A EP84105556A EP0130331B1 EP 0130331 B1 EP0130331 B1 EP 0130331B1 EP 84105556 A EP84105556 A EP 84105556A EP 84105556 A EP84105556 A EP 84105556A EP 0130331 B1 EP0130331 B1 EP 0130331B1
Authority
EP
European Patent Office
Prior art keywords
rotor
gas
casing
pressure wave
end surfaces
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.)
Expired
Application number
EP84105556A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0130331A1 (de
Inventor
Hubert Kirchhofer
Raymond Schelling
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.)
BBC Brown Boveri AG Switzerland
Original Assignee
BBC Brown Boveri AG Switzerland
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 BBC Brown Boveri AG Switzerland filed Critical BBC Brown Boveri AG Switzerland
Priority to AT84105556T priority Critical patent/ATE21439T1/de
Publication of EP0130331A1 publication Critical patent/EP0130331A1/de
Application granted granted Critical
Publication of EP0130331B1 publication Critical patent/EP0130331B1/de
Expired 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
    • F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
    • F04F13/00—Pressure exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B33/00—Engines characterised by provision of pumps for charging or scavenging
    • F02B33/32—Engines with pumps other than of reciprocating-piston type
    • F02B33/42—Engines with pumps other than of reciprocating-piston type with driven apparatus for immediate conversion of combustion gas pressure into pressure of fresh charge, e.g. with cell-type pressure exchangers

Definitions

  • the invention relates to a gas-dynamic pressure wave charger for vehicle internal combustion engines according to the preamble of claim 1.
  • an abradable, for example graphite-nickel layer can be applied to the housing or rotor end faces or an abrasive fine-grained A1 2 0 3 (corundum base) layer to the housing end faces.
  • the streak is only rubbed off in the radial area of the relatively sharp-edged cell walls.
  • the layer in the area of the thick hub tube is merely compressed, which can result in the rotor becoming blocked when rubbed hard.
  • the layer can crumble and thus lead to poor efficiency of the pressure wave charger.
  • the invention is based on the object of creating a gas-dynamic pressure wave charger of the type mentioned which, without the use of stripping layers, has an optimal shape in terms of thermal expansion and rotor vibrations of the rotor and housing end faces, which ensures the proper functioning of the pressure wave charger.
  • Fig. 1 denotes the gas housing and 2 the air housing of the pressure wave charger.
  • the two housings are connected together with the stator middle part 4, in which the rotor 3 is arranged.
  • the rotor 3 is fastened on the shaft 5 and mounted in the air housing 2.
  • a V-belt wheel 6 is arranged on the shaft 5.
  • the hot exhaust gases of the internal combustion engine enter through the engine exhaust gas duct A into the rotor 3 of the pressure wave supercharger provided with axially straight rotor cells 3e which are open on both sides, expand therein and leave it into the atmosphere via the exhaust duct B and the exhaust line (not shown). Atmospheric air is drawn in on the air side, flows axially into the rotor 3 via the air intake duct C, is compressed therein and leaves it as charge air via the charge air duct D to the internal combustion engine, not shown.
  • the axial installation clearance can be measured outside via the rotor shroud. It must be large enough so that the rotor does not come into contact with the hub area during operation.
  • the thermal expansion behavior of the rotor and stator center part is very different in the individual operating states.
  • the most critical, with regard to grazing risk, is the transient play behavior when starting the cold internal combustion engine and then rapidly accelerating to full load and maximum speed.
  • the rotor has a relatively thick hub tube 3a, a thin intermediate tube 3b and a thin outer cover band 3c.
  • the rotor 3 is generally subjected to constant temperature fluctuations in the load and speed changes.
  • the hub tube 3a Because of the greater heat capacity of the hub tube 3a, this has a higher temperature on average than the outer shroud 3c. This results in greater thermal expansion of the hub tube 3a compared to the outer shroud 3c.
  • the outer shroud 3c emits more heat to the outside than the hub tube 3a due to ventilation and heat radiation. In the hub space 3d, the heat emission also leads to a build-up of heat.
  • the greater thermal expansion of the hub tube 3a leads to an axial deformation, in particular of the gas-side rotor end face. Due to the different thermal expansion at different radii, the rotor end face facing the gas housing and the gas housing end face facing the rotor are given a convex shape, the axial play increasing with increasing radius. On the air side, the relative thermal deformation between the rotor 3 and the end face of the air housing 2 facing the rotor is negligible.
  • axial play in the cold state of a pressure wave charger belonging to the prior art is shown to scale and exaggerated size.
  • the axial play Y which is dependent on the radius, at the operating temperature of the pressure wave charger is, among other things, a function of the temperature distribution in the rotor and in the gas housing.
  • the radius-dependent deformation Z 2 of the rotor and that Z 1 of the gas housing are dependent both on the temperature and the thermal expansion coefficient of the material used.
  • Fig. 2 the neutral position of the rotor of a pressure wave charger is shown schematically with a thick full line, the line W-W representing the axis of rotation.
  • the left side of the rotor shown in the picture is the air housing side. Since the attachment point of the rotor on the shaft 5 is in the vicinity of the relatively colder air housing, the rotor mainly expands in the direction of the gas housing and since the inner part of the rotor is warmer than the outer one, the gas-side rotor end face deforms convexly at the same time. This deformation is shown with a thick dash-dot line. The radial thermal expansion is not taken into account here.
  • the pressure wave charger is known.
  • at least one of the two mutually facing end faces of the rotor or of the air housing is now convex on the air housing side and / or at least one of the two facing end faces of the rotor or of the gas housing is concave on the gas housing side.
  • the convex or concave end faces are either designed as truncated cone surfaces or spherical surfaces or from two or more successive truncated cone surfaces with different cone angles.
  • the processing angle on the rotor end face a facing the gas housing or on the gas housing end face b facing the rotor is advantageously between 10 'and 30'.
  • both the rotor end faces and the housing end faces are machined as truncated cone surfaces in such a way that the smallest possible axial clearances are achieved in the operating state of the pressure wave loader and that a Brushing the rotor is still impossible. Both thermal expansions and mechanical rotor vibrations are taken into account.
  • the processing angles a, b, c and d are drawn out to scale because of the better clarity. If only one of the gas-side end faces is machined as a truncated cone surface, for example the end face of the gas housing 1 facing the rotor 3, the machining angle b in this case is preferably between 10 'and 30'. If the two mutually facing gas-side end faces are machined as truncated cone lateral faces, the two machining angles a and b are preferably 5 'to 15' each.
  • the required profiles of the rotor or housing faces can be calculated exactly. These profiles can also be determined by tests. For this purpose, graphite pencils can be inserted into the gas and air housing faces. The graphite pins are ground off the rotor on the test bench when the pressure wave charger is in hot operation. The optimal shape of the end faces can be determined by measuring the remaining pin lengths. If the required axial clearances between the rotor and the air or gas housing are defined, a cost comparison can be used to determine whether the radial distribution of the required axial clearances should be achieved by machining the rotor and / or housing end face.
  • the housing face should also be profiled in the circumferential direction, i.e. whether it should be machined as a rotationally asymmetrical surface is a question of optimization, according to which the additional machining costs should be compared with the gain in efficiency.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Supercharger (AREA)
  • Catalysts (AREA)
EP84105556A 1983-06-29 1984-05-16 Gasdynamischer Druckwellenlader für Fahrzeug-Verbrennungsmotoren Expired EP0130331B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84105556T ATE21439T1 (de) 1983-06-29 1984-05-16 Gasdynamischer druckwellenlader fuer fahrzeugverbrennungsmotoren.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3558/83 1983-06-29
CH355883 1983-06-29

Publications (2)

Publication Number Publication Date
EP0130331A1 EP0130331A1 (de) 1985-01-09
EP0130331B1 true EP0130331B1 (de) 1986-08-13

Family

ID=4258578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84105556A Expired EP0130331B1 (de) 1983-06-29 1984-05-16 Gasdynamischer Druckwellenlader für Fahrzeug-Verbrennungsmotoren

Country Status (5)

Country Link
US (1) US4529360A (enrdf_load_stackoverflow)
EP (1) EP0130331B1 (enrdf_load_stackoverflow)
JP (1) JPS6013922A (enrdf_load_stackoverflow)
AT (1) ATE21439T1 (enrdf_load_stackoverflow)
DE (1) DE3460471D1 (enrdf_load_stackoverflow)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988005133A1 (en) * 1987-01-05 1988-07-14 Hauge Leif J Pressure exchanger for liquids
CH680150A5 (enrdf_load_stackoverflow) * 1989-12-06 1992-06-30 Asea Brown Boveri
US5115566A (en) * 1990-03-01 1992-05-26 Eric Zeitlin Food and liquid fanning device
JPH07151204A (ja) * 1993-11-30 1995-06-13 Maki Shinko:Kk 並列型直線作動機
US5839416A (en) * 1996-11-12 1998-11-24 Caterpillar Inc. Control system for pressure wave supercharger to optimize emissions and performance of an internal combustion engine
JP5062334B2 (ja) * 2010-04-20 2012-10-31 トヨタ自動車株式会社 圧力波過給機
ES2647277T3 (es) * 2012-06-07 2017-12-20 Mec Lasertec Ag Rueda celular, en particular para un sobrealimentador por ondas de presión
US11555509B2 (en) * 2021-03-02 2023-01-17 Energy Recovery, Inc. Motorized pressure exchanger with a low-pressure centerbore

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2687843A (en) * 1950-01-06 1954-08-31 Andre Gabor Tihamer Baszormeny Gas pressure exchanger
GB923368A (en) * 1961-01-30 1963-04-10 Power Jets Res & Dev Ltd Improvements in or relating to pressure exchangers
JPS4882305U (enrdf_load_stackoverflow) * 1972-01-13 1973-10-06
JPS5825861B2 (ja) * 1977-11-09 1983-05-30 いすゞ自動車株式会社 内燃機関用ピストン

Also Published As

Publication number Publication date
JPH0514091B2 (enrdf_load_stackoverflow) 1993-02-24
DE3460471D1 (en) 1986-09-18
ATE21439T1 (de) 1986-08-15
US4529360A (en) 1985-07-16
JPS6013922A (ja) 1985-01-24
EP0130331A1 (de) 1985-01-09

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