EP0392230B1 - Innenachsige Drehkolbenmaschine - Google Patents

Innenachsige Drehkolbenmaschine Download PDF

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Publication number
EP0392230B1
EP0392230B1 EP90105479A EP90105479A EP0392230B1 EP 0392230 B1 EP0392230 B1 EP 0392230B1 EP 90105479 A EP90105479 A EP 90105479A EP 90105479 A EP90105479 A EP 90105479A EP 0392230 B1 EP0392230 B1 EP 0392230B1
Authority
EP
European Patent Office
Prior art keywords
chamber
rotary piston
piston engine
engine according
transmission
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 - Lifetime
Application number
EP90105479A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0392230A3 (de
EP0392230A2 (de
Inventor
Uwe Münkel
Wolfgang Kraft
Christiane Römuss
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.)
Howden Turbo GmbH
Original Assignee
Siemens Turbomachinery Equipment GmbH
Kuehnle Kopp and Kausch AG
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 Siemens Turbomachinery Equipment GmbH, Kuehnle Kopp and Kausch AG filed Critical Siemens Turbomachinery Equipment GmbH
Priority to AT90105479T priority Critical patent/ATE83534T1/de
Publication of EP0392230A2 publication Critical patent/EP0392230A2/de
Publication of EP0392230A3 publication Critical patent/EP0392230A3/de
Application granted granted Critical
Publication of EP0392230B1 publication Critical patent/EP0392230B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • F01C21/003—Systems for the equilibration of forces acting on the elements of the machine
    • F01C21/005—Internal leakage control

Definitions

  • the invention relates to an inner-axis rotary lobe machine according to the features specified in the preamble of claim 1.
  • Such a rotary piston machine is known from EP 290 864 A2.
  • An outer rotor and an inner rotor are arranged in a housing and mesh with one another.
  • the outer rotor has n + 1 recesses between engagement parts.
  • the inner rotor and the outer rotor rotate uniformly at a speed ratio (n + 1): n.
  • a gear is arranged in a gear space, by means of which the gear coupling of the outer rotor to the inner rotor takes place.
  • Such an equalization line can generally be routed in an area or room in which a lower pressure than in the pressure chamber prevails.
  • the compensating line can also be connected to a connection of a vent of the motor vehicle engine, which is charged by means of the rotary piston machine. Regardless of the particular design, the equalization line is used to vent the transmission space, the pressure drop from the transmission space to the second space being reduced.
  • the invention has for its object to develop the inner-axis rotary lobe machine of the type mentioned in such a way that a reliable lubricant supply to the transmission is guaranteed for a long service life.
  • Pumping lubricant from the gearbox into the suction chamber should be reliably prevented.
  • the design effort and the construction volume should be kept small. Nevertheless, the gearbox should be accessible in a simple manner and inspection or maintenance work should be possible with little effort. Finally, the manufacturing effort should be kept low.
  • the rotary lobe machine designed in accordance with the invention is distinguished by a functionally appropriate construction and by means of the calming chamber the delivery of lubricant from the gear chamber is reliably prevented.
  • the lubricant delivered with the leakage air from the gearbox into the calming chamber is separated from the leakage air in the calming chamber.
  • the design effort and the construction volume for the calming chamber are low, and the gearbox is nevertheless easily accessible.
  • the leakage air which is practically free of lubricant in the direction of flow behind the settling chamber then flows through the compensating line into the second space mentioned, which has a substantially lower pressure and is formed in particular by the suction chamber or the engine ventilation.
  • the suction chamber or in the engine breather there are essentially the same pressure conditions as in the outside atmosphere or ambient air, provided the delivery rate is relatively low and / or an upstream air filter in the intake pipe does not cause an excessive pressure drop.
  • the calming chamber can also serve as a reservoir for the lubricant within the scope of the invention and long time intervals between inspection work can be specified.
  • the volume or the cross-sectional area of the calming chamber through which the leakage air flows is substantially larger than the cross section of the connecting line between the gear chamber and the calming chamber.
  • the flow rate in the settling chamber is reduced considerably, so that lubricant is separated and collected in the settling chamber. If the rotary lobe machine is used to charge motor vehicle engines, the transmission chamber is vented via the calming chamber to the suction chamber.
  • the gases entering the suction chamber via the rotary piston machine and / or the more or less volatile constituents of the lubricant are fed to the motor vehicle engine for afterburning.
  • the regulations and requirements for environmental protection are met in a particularly expedient manner.
  • the connecting line is expediently arranged in such a way that the lubricant which has entered the calming chamber can flow back into the transmission space.
  • the calming chamber communicates with the transmission space via the above-mentioned connecting line and is expediently arranged in a transmission cover, which can be removed for inspection or maintenance of the transmission, without having to disassemble the transmission or the rotary piston machine as a whole.
  • additional holes can expediently be arranged between the transmission space and the calming chamber. If the rotary lobe machine has a housing cover, this expediently contains a bore in which the gear cover with the calming chamber is inserted.
  • the housing cover contains both the connecting line to the gearbox and from the compensating line the line part which leads from the calming chamber into the second room at a lower pressure.
  • FIG. 1 only the one axial end region of the rotary piston machine with a housing 2 is shown.
  • an outer rotor 4 is rotatably mounted about a longitudinal axis 6 by means of a bearing 8.
  • the housing 2 is pot-shaped and sealed tightly and firmly with a housing cover 10.
  • the inner ring of the bearing 8 is supported on the inside of the housing cover 10.
  • the outer rotor 4 contains a ring 12 at each of its two axial ends. With this ring, three engagement parts 14 distributed over the circumference are firmly connected by means of screws 16, only one engagement part 14 being visible according to FIG. 1.
  • two piston rings 18 are provided in ring grooves in the outer surface of the ring 12. Furthermore, a seal is achieved due to the narrow design of the gaps between the outer rotor, the housing 2 and the housing cover 10.
  • the outer rotor 4 also includes an internally toothed ring gear 20, which is likewise fixed on the outer rotor with the screws 16 mentioned.
  • This ring gear 20 is in meshing engagement with an externally toothed gear 22 of the inner rotor 24.
  • the inner rotor 24 is rotatable eccentrically to the outer rotor about an axis 26.
  • the ring gear 20 and the gear 22 are located in a gear chamber 28 between the housing cover 10 and the outer rotor or the ring 12 thereof.
  • the housing cover 10 has a bore 30 which is closed with a gear cover 32.
  • the gear cover 32 contains a hollow chamber 34 inside, which is designed as a calming chamber for lubricants and leakage air.
  • the gear cover 32 has a cup-shaped first part 36 which is tightly connected to a second part 38.
  • the housing cover 32 can also be made in one piece, expediently from plastic.
  • the first part 36 contains a recess coaxial to the axis 26, into which the free end of the shaft of the inner rotor 26 projects. If necessary, said shaft can penetrate the two parts 36, 38 completely and thus be guided freely to the outside.
  • the gear cover 32 can be removed so that the gear space 28 is freely accessible.
  • a connecting line 40 is provided in the housing cover 10, which is a component of the compensating line and represents the connection between the transmission space 28 and the calming chamber 34.
  • the gear cover 32 or its cup-shaped part 36 has an opening 42 assigned to the connecting line 40.
  • the opening 42 and the connecting line 40 are arranged in the normal installation position of the inner-axis rotary lobe machine in such a way that they are at the lowest point and allow lubricant to flow out of the calming chamber 34 into the gear chamber 28.
  • the housing cover 10 also contains, from the compensating line, a line part 44 to which a second opening 46 of the gear cover 32 or its part 36 is assigned.
  • a further line 48 adjoins the line part 44 in the housing 2, which leads into a second space 49, which is only indicated symbolically here.
  • This second space can be designed as the suction chamber of the rotary piston machine.
  • this second space 49 can be designed as an engine ventilation of a motor vehicle engine, not shown here, which is charged by means of the rotary piston machine.
  • the line part 44 has a smaller cross-sectional area in comparison with the connecting line 40.
  • the line 48 in the housing 2 can also have a reduced cross-sectional area. The line part 44 and / or the line 48 thus form a throttle point.
  • leakage air mixed with lubricant from the gear chamber 28 passes through the connecting line 40 into the calming chamber 34. Because of the comparatively large volume of the calming chamber, the flow velocity decreases there Leakage air such that the lubricant is no longer conveyed and accumulates in the calming chamber 34.
  • the leakage air freed from lubricant passes through the line part 44 and further through the line 48 to the suction chamber.
  • the line part 44 formed with a small cross-sectional area forms a throttle point and the pressure in the settling chamber 34 is essentially the same as the pressure in the transmission space 28.
  • FIG. 2 shows a section along section line A-B according to FIG. 1, arrow 50 indicating the direction of rotation of the gear wheel 22 of the inner rotor.
  • the housing cover 10 contains a crescent-shaped part 52, which ends in the direction of rotation before the tooth engagement of the ring gear 20 with the gear 22 of the inner rotor.
  • a sickle-like gap 56 is present between the ring gear 20 and the radially inner part 54, the gap width 58 of which decreases with increasing distance from the tooth engagement.
  • the largest gap width is present immediately behind the tooth mesh.
  • FIG. 3 shows a section along section line CD according to FIG. 2.
  • the housing cover 10 has a recess 60.
  • This recess 60 has a comparatively large cross-sectional area behind the tooth engagement and forms an enlargement of the gear space there.
  • the cross-sectional area of this recess 60 decreases in the direction of rotation of the gear wheel 22, ie vertically downward according to FIG. 2.
  • the opening 42 of the pot-shaped part 36 of the gear cover 32 opening into the calming chamber 34 is clearly visible.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • General Details Of Gearings (AREA)
  • Rotary Pumps (AREA)
  • Toys (AREA)
  • X-Ray Techniques (AREA)
  • Steroid Compounds (AREA)
  • Crushing And Pulverization Processes (AREA)
  • Hydraulic Motors (AREA)
  • Reciprocating Pumps (AREA)
EP90105479A 1989-04-08 1990-03-23 Innenachsige Drehkolbenmaschine Expired - Lifetime EP0392230B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90105479T ATE83534T1 (de) 1989-04-08 1990-03-23 Innenachsige drehkolbenmaschine.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3911540 1989-04-08
DE3911540A DE3911540C1 (cs) 1989-04-08 1989-04-08

Publications (3)

Publication Number Publication Date
EP0392230A2 EP0392230A2 (de) 1990-10-17
EP0392230A3 EP0392230A3 (de) 1991-09-11
EP0392230B1 true EP0392230B1 (de) 1992-12-16

Family

ID=6378233

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90105479A Expired - Lifetime EP0392230B1 (de) 1989-04-08 1990-03-23 Innenachsige Drehkolbenmaschine

Country Status (7)

Country Link
EP (1) EP0392230B1 (cs)
JP (1) JPH02291487A (cs)
AT (1) ATE83534T1 (cs)
BR (1) BR9001641A (cs)
CS (1) CS171490A2 (cs)
DE (2) DE3911540C1 (cs)
ZA (1) ZA902652B (cs)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH669975A5 (cs) * 1986-06-13 1989-04-28 Wankel Felix
DE3709901A1 (de) * 1987-03-26 1988-10-06 Wankel Felix Innenachsige drehkolbenmaschine, insbesondere lader
DE3716083A1 (de) * 1987-05-14 1988-11-24 Kuehnle Kopp Kausch Ag Innenachsige drehkolbenmaschine

Also Published As

Publication number Publication date
CS171490A2 (en) 1991-09-15
DE3911540C1 (cs) 1990-03-29
EP0392230A3 (de) 1991-09-11
ATE83534T1 (de) 1993-01-15
BR9001641A (pt) 1991-05-07
DE59000592D1 (de) 1993-01-28
JPH02291487A (ja) 1990-12-03
ZA902652B (en) 1991-01-30
EP0392230A2 (de) 1990-10-17

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