EP2643553A1 - Rotationskolbenmaschine, insbesondere kreiskolbenmotor - Google Patents
Rotationskolbenmaschine, insbesondere kreiskolbenmotorInfo
- Publication number
- EP2643553A1 EP2643553A1 EP11788378.5A EP11788378A EP2643553A1 EP 2643553 A1 EP2643553 A1 EP 2643553A1 EP 11788378 A EP11788378 A EP 11788378A EP 2643553 A1 EP2643553 A1 EP 2643553A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rotary piston
- machine according
- rotary
- piston
- side seal
- 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.)
- Granted
Links
Classifications
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- 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
- F04C2/00—Rotary-piston machines or pumps
-
- 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
- F01C1/00—Rotary-piston machines or engines
- F01C1/22—Rotary-piston machines or engines of internal-axis type with equidirectional movement of co-operating members at the points of engagement, or with one of the co-operating members being stationary, the inner member having more teeth or tooth- equivalents than the outer member
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- 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
- F01C19/00—Sealing arrangements in rotary-piston machines or engines
- F01C19/02—Radially-movable sealings for working fluids
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- 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
- F01C19/00—Sealing arrangements in rotary-piston machines or engines
- F01C19/12—Sealing arrangements in rotary-piston machines or engines for other than working fluid
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- 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
- F02B53/00—Internal-combustion aspects of rotary-piston or oscillating-piston engines
- F02B2053/005—Wankel engines
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- 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
- F02B55/00—Internal-combustion aspects of rotary pistons; Outer members for co-operation with rotary pistons
- F02B55/02—Pistons
- F02B55/04—Cooling thereof
- F02B55/06—Cooling thereof by air or other gas
Definitions
- Rotary piston machine in particular rotary piston engine 561 11
- the present invention relates to a rotary piston machine, and more particularly to a rotary engine.
- the invention will be described with reference to a rotary engine in which a substantially triangular Rotationskoiben rotates on a arranged in a motor housing eccentric shaft.
- the invention is also applicable to a rotary piston engine with two, four or more piston corners and can generally also with rotary piston engines, which have a centric in the motor housing rotating piston, are used.
- the invention can also be used in rotary-piston machines with two, three or more juxtaposed rotary pistons.
- the present invention is preferably applicable to motor vehicles.
- the present invention can be used in a particularly advantageous manner in conjunction with a power generator, which is particularly suitable for use as a so-called range extender in electrically powered vehicles.
- Such rotary piston machines usually have a housing; a piston wall formed by a first side wall, a second side wall and a peripheral wall connecting said side walls in said housing; and a rotatably disposed in the piston chamber rotary piston having a first end face and a second end face.
- the first end face of the rotary piston faces an inner side of the first side wall of the piston chamber
- the second end side of the rotary piston faces an inner side of the second side wall of the piston chamber.
- at least two, in the case of a triangular-shaped rotary piston three working spaces are formed between a peripheral surface of the rotary piston and the circumferential wall of the piston chamber.
- first side seals are provided on the two end faces of the rotary piston for sealing these intermediate spaces against the work spaces.
- DE 195 27 396 C2 proposes to improve the sealing effect, the side seals elastically bias and equip with additional sealing rings in the radial direction.
- second side seals (usually referred to as oil seals) are usually provided, which are positioned in the radial direction within the first side seals and the sealing of the intermediate spaces between the end faces of the rotary piston and the side walls the piston chamber against the center Serve ralbohrung in the rotary piston.
- oil seals are usually provided, which are positioned in the radial direction within the first side seals and the sealing of the intermediate spaces between the end faces of the rotary piston and the side walls the piston chamber against the center Serve ralbohrung in the rotary piston.
- the US 3,849,038 A describes a configuration of a rotary engine in which the inlet opening in the side wall of the piston chamber is arranged and shaped such that a portion between two radially spaced oil seals in which blowby gases can collect this inlet opening during rotation of the Rotary piston sweeps over so that the blowby gases can be discharged from the intermediate space via this inlet opening of the piston chamber and fed back into the work spaces.
- recesses are respectively provided in the radial direction between the first side seals and the second side seals in the end faces of the rotary piston, in which the blowby gases which overcome the first side seals can collect from the working spaces.
- the blowby gases are emptied via the inlet opening in the side wall (s) of the piston chamber when it is swept over it during the rotation of the rotary piston.
- JP 03-037301 A discloses a rotary piston machine, wherein in the radial direction between the first side seals and the second side seals of the rotary piston in each case recesses are provided in the end faces of the rotary piston, in which the blow-by gases can collect from the work spaces.
- the rotary piston is further formed in the axial direction with a through hole which connects the recesses in the two end faces of the rotary piston with each other. Through this through hole, a pressure reduction of the blow-by gases and also a pressure equalization between the blow-by gases can be carried out to both end faces of the rotary piston.
- the invention has for its object to provide a rotary piston machine with improved ventilation of blow-by gases, which penetrate from the working spaces in the piston chamber into the spaces between the side walls of the piston chamber and the end faces of the rotary piston.
- This object is achieved by the teaching of claim 1.
- Preferred developments of the invention are the subject of the dependent claims.
- the rotary piston machine has a housing; a piston chamber formed in the housing by a first side wall, a second side wall and a peripheral wall connecting the side walls; a rotatably disposed in the piston chamber rotary piston having a first end face and a second end face, wherein the first end face of the rotary piston faces an inner side of the first side wall of the piston chamber and the second end side of the rotary piston faces an inner side of the second side wall of the piston chamber and wherein between a Peripheral surface of the rotary piston and the peripheral wall of the piston chamber at least two working spaces are formed; and at least a first side seal at the first and second end faces of the rotary piston for sealing clearances between the first and second side walls of the piston chamber and the first and second end faces of the rotary piston against the work spaces, respectively.
- the rotary piston machine is characterized in that in the first and / or the second side wall of the piston chamber at least one vent hole is provided, which is connected to at least one vent channel in the housing, wherein the at least one vent hole is provided at a location in the radial Direction lies within the at least one first side seal.
- the rotary piston machine of the invention can be designed in particular as a rotary piston engine.
- the rotary piston machine or the rotary piston engine of the invention can be designed in particular for use as a so-called range extender for an electrically operated motor vehicle.
- the inventive construction at least one vent hole, which is connected to at least one vent channel in the housing to provide in the first and / or the second side wall of the piston chamber at a location which lies in the radial direction within the at least one first side seal, Blowby -Gases from the work spaces, which overcome the first side seals are drained very quickly from the spaces between the side walls of the piston chamber and the end faces of the rotary piston.
- Blowby -Gases from the work spaces, which overcome the first side seals are drained very quickly from the spaces between the side walls of the piston chamber and the end faces of the rotary piston.
- the first side seals on the end faces of the rotary piston should basically prevent the penetration of the blow-by gases from the working spaces in the piston chamber into the intermediate spaces between the side walls of the piston chamber and the end faces of the rotary piston. This sealing effect can not always be fully guaranteed, especially at high pressures in the work spaces. Since the highest pressures are generated in the workrooms at the time of ignition, In particular, at this time blowby gases enter into the spaces between the side walls of the piston chamber and the end faces of the rotary piston.
- the at least one venting bore is provided at a location which lies in the radial direction within the at least one first side seal of the rotary piston. In this way it can be achieved that through the at least one vent hole in the / the side wall (s) of the piston chamber only blowby gases from the said interstices, but not discharged directly from the work spaces in the vent passage in the housing.
- the "piston chamber” generally designates a space in the housing of the rotary piston machine in which the rotary piston is arranged. [Im Im]
- the drive shaft of the rotary piston machine on which the rotary piston rotates also extends through this piston chamber
- the "sidewalls" and / or the “circumferential wall” of the plunger chamber are preferably formed integrally with the housing or a housing part or configured as separate components which are connected to the housing
- These walls of the piston chamber may each be optionally made of the same material as the housing or of a different material from the material of the housing material.
- work spaces is meant the subspaces of the piston chamber formed between the rotary piston and the circumferential wall of the piston chamber, for example, three such work spaces are present in the case of a triangular rotary piston
- the at least two work spaces are usually separated, preferably by radial seals in the corners of the rotary piston.
- the "at least one first side seal” is a sealant which is mounted in or on the first or second end face of the rotary piston
- the at least one first side seal also abuts against the inside of the first and second side walls of the piston chamber during rotation of the rotary piston
- the first side seal is a one or more part component
- the "at least one" first side seal comprises exactly one first side seal and two or more, in the radial direction Direction spaced first side seals.
- the first side seals are generally provided on the first end side and on the second end side of the rotary piston. This arrangement of the first side seals can be chosen either symmetrically or asymmetrically with respect to the positioning, the size, the shape, the configuration and / or the number of the first side seals.
- the "at least one venting bore” generally constitutes a passage opening in the respective side wall of the piston chamber, which allows blowby gases to pass through.
- the vent hole (s) may be provided either only in one of the two side walls of the piston chamber or in both side walls of the piston chamber In the latter case, the vent holes of the side walls are either with a common vent passage in the housing or connected to different ventilation channels in the housing.
- the "radial direction” and the “axial direction” refer in the context of the present invention in each case to a direction of the axis of rotation of the drive shaft of the rotary piston machine, which rotates about which the rotary piston.
- An extension in the “axial direction” therefore means an extension substantially parallel to the axis of rotation of the drive shaft
- an extension in the "radial direction” means an extension substantially perpendicular to the axis of rotation of the drive shaft.
- the arrangement of the at least one vent hole in the radial direction "within the at least one first side seal” means that the at least one vent hole, preferably all the vent holes in the side wall of the piston chamber, are provided in the radial direction within the one first side seal (if exactly one first side seal is provided ) or within the radially outermost first side seal, preferably within the radially innermost first side seal (if two or more first side seals are provided on an end face of the rotary piston)
- the vent bore (s) are substantially complete within the at least one
- the at least one venting bore is preferably within an envelope (over a complete revolution of the rotary piston), preferably within an inner envelope, of the at least one first n side seal arranged.
- the rotary piston also has a central bore and is at least a second side seal at the first and second end faces of the rotary piston for sealing the spaces between the first and second side walls of the piston chamber and the first and second end faces of the rotary piston provided against the central bore, wherein the at least one second side seal is arranged in the radial direction within the at least one first side seal.
- the at least one venting bore is in this case positioned in the radial direction outside the at least one second side seal.
- the second side seals basically serve to seal the gaps between the first and second side walls of the piston chamber and the first or second end face of the rotary piston against the central bore, to prevent leakage of a lubricant (eg lubricating oil) for the bearings of the drive shaft and the rotary piston from the central bore to the outside in the said gaps.
- a lubricant eg lubricating oil
- these second side seals improve a sealing effect against the penetration of the blow-by gases from the working chambers of the piston chamber in said intermediate spaces to the central bore of the rotary piston.
- the arrangement of the at least one vent hole in the radial direction outside the at least one second side seal causes the at least one vent hole in this embodiment to be positioned in the radial direction between the at least one first side seal and the at least one second side seal.
- the "at least one second side seal” is a sealant that is mounted in or on the first and second end faces of the rotary piston, and the at least one second side seal abuts against the inside of the first and second sidewalls of the piston chamber as the rotary piston rotates
- the second side seal is a single or multiple component
- the "at least one" second side seal comprises exactly one second side seal as well as two, three or more, spaced in the radial direction second side seals.
- the second side seals are generally provided on the first end side and on the second end side of the rotary piston. This arrangement of the second side seals can be chosen either symmetrically or asymmetrically with respect to the positioning, the size, the shape, the configuration and / or the number of second side seals.
- the first and second side seals may either be substantially identical in construction or designed differently from one another.
- the arrangement of the at least one vent hole in the radial direction "outside the at least one second side seal” means that the at least one vent hole, preferably all the vent holes in the side wall (s) of the piston chamber in the radial direction outside the second side seal (if exactly one second side seal is provided) or outside the radially innermost second side seal, preferably outside the radially outermost second side seal (if two or more second side seals are provided on an end face of the rotary piston)
- the at least one ventilation bore is preferably outside an envelope (over a complete revolution of the rotary piston), preferably outside an outer envelope r arranged at least one second side seal.
- At least one radial seal projecting in the direction of the circumferential wall of the piston chamber is arranged on the peripheral surface of the rotary piston.
- the at least one venting bore is in this case preferably in the radial direction within the at least one radial seal.
- the "at least one radial direction" is a sealant which is mounted in or on the peripheral surface of the rotary piston and serves to separate the adjacent working spaces during rotation of the rotary piston.
- the at least one radial seal abuts against the circumferential wall of the piston chamber as the rotary piston rotates
- Radial seals are preferably provided in the corner regions of the rotary piston, the "at least one" radial seal comprising exactly one, two or more radial seals in each corner region of the rotary piston.
- the radial seals are preferably each arranged in a sealing bolt in the rotary piston, preferably inserted in a groove of a sealing bolt in the rotary piston.
- the arrangement of the at least one venting bore in the radial direction "within the at least one radial seal” is intended to mean that the at least one venting bore, preferably all venting bores in the side wall (s) of the piston chamber in the radial direction within the radially inner edges of the radial seals
- the vent bore (s) are / are located substantially entirely within the at least one radial seal or its groove bottom, and the at least one vent bore is preferably within an envelope, preferably within one inner envelope of the at least one radial seal or its groove bottom positioned.
- the positioning of the at least one vent hole in the radial direction within the at least one radial direction means that the at least one vent hole lies radially within the at least one first side seal or within the at least one radial seal, whichever position is further inward in the radial direction ,
- the at least one vent hole lies within an angular segment in which no coolant bore is provided in the first or second side wall.
- the at least one vent hole is arranged in an angular segment in which there is sufficient space for their training.
- the at least one vent hole is within an angular segment of the cold arc of the piston chamber.
- cold arc is understood to mean the angular segment of the piston chamber in which a consistently cold zone is formed in the essentially stationary temperature distribution, and this measure can also prevent the vent holes and any cooling measures of the rotary piston machine from interfering with one another.
- the rotary piston has at least one cavity which extends in the radial direction within the at least one first side seal or between the at least one first side seal and the at least one second side seal from the first end side to the second end side.
- the intermediate spaces are connected to both end faces of the rotary piston with each other, so that the blowing into the gaps between the first and second side walls of the piston chamber and the first and second end face of the rotary piston blowby gases can flow into the cavity of the rotary piston. In this way, the pressure built up by the blow-by gases in the said gaps can be reduced and compensated between the two end faces of the rotary piston.
- the "at least one" cavity in the rotary piston between the two end faces of the rotary piston comprises exactly one as well as two or more cavities.
- the “cavity” is generally any cavity which allows passage through the blowby gases.
- the “at least one cavity” preferably extends substantially in the axial direction through the rotary piston, but it may also be oriented at an angle to the axial direction at least one cavity has a substantially constant cross-section (in terms of shape and / or size) or a variable across its length cross-section.
- At least one vent hole is preferably provided only in one of the first and the second side wall of the piston chamber.
- a venting channel is sufficient only on one side of the rotary piston in the housing.
- at least one ventilation bore is provided on each of the two side walls of the piston chamber.
- the rotary piston in the region of each working space in the first end face in the radial direction within the at least one first side seal or between the at least one first Side seal and the at least one second side seal at least a first recess and in the second end face in the radial direction within the at least one first side seal or between the at least one first side seal and the at least one second side seal at least one second recess.
- the at least one first recess in the first end face of the rotary piston and the at least one second recess in the second end face of the rotary piston are preferably connected to one another by at least one passage opening.
- the pressure between the two end faces of the rotary piston caused by the blow-by gases in the said interspaces or in the recesses of the rotary piston end faces can be compensated.
- this passage opening (s) a continuous cavity is created in the rotary piston with the advantages already described above also here.
- the "at least one" first or second recess in the first / second end face of the rotary piston comprises exactly one as well as two, three or more first and second recesses, respectively.
- This arrangement of the first and second recesses can be either symmetrical or asymmetrical with respect to the Positioning, the size, the shape, the configuration and / or the number of first / second recesses may be selected.
- the "at least one" through-opening in the rotary piston between the recess on both end faces of the rotary piston comprises exactly one as well as two or more through-openings Several recesses can be connected through a through-opening and several through-openings can connect a first and a second recess.
- the "through-hole” is generally any through-hole that allows it to flow through the blow-by gases, and the "at least one through-hole” preferably extends substantially in the axial direction between the recesses through the rotary piston; but it can also be aligned at an angle to the axial direction.
- the at least one passage opening may be substantially rectilinear or curved or sectionally curved.
- the at least one passage opening may have a substantially constant cross-section (in terms of shape and / or size) or a cross-section that varies over its length. - -
- the at least one vent hole is connected via at least one connecting channel with the vent channel.
- the connection channel in the housing allows positioning of the vent channel more or less independent of the position of the vent hole in the side wall of the piston chamber.
- the at least one vent hole and / or the at least one connecting channel in the direction of the venting channel are formed at least partially rising.
- This orientation of the vent hole and / or the connection channel improves the outflow of the blowby gases from the spaces between the side walls of the piston chamber and the end faces of the rotary piston in the vent channel. Further, this orientation of the vent hole and / or the connecting channel can achieve a more or less pronounced ⁇ labscheidewir- effect, so that less lubricant is entrained by the blowby gases in the vent channel.
- At least one device for influencing the opening cross-section of the venting bore or of the connecting channel is provided in or on the at least one venting bore and / or the at least one connecting channel.
- This device for influencing the opening cross-section can be designed, for example, in the form of a throttle or diaphragm device.
- the at least one venting bore preferably has an elongate cross section in the concentric direction of the rotary piston, preferably a substantially kidney-shaped cross section.
- This embodiment of the vent hole (s) improves the outflow of blowby gases from the spaces between the side walls of the piston chamber and the end faces of the rotary piston in the vent passage.
- the at least one venting channel in the housing is connected to an oil separation device.
- the at least one venting channel is connected to an oil pan.
- At least one further connecting channel is provided for connecting the central bore of the rotary piston to the venting channel.
- This further connection channel can also Blowby gases, which overcome not only the first side seals but also the second side seals, are drained from the central bore of the rotary piston.
- venting channel, the connecting channel and / or the further connecting channel can be at least partially labyrinth-like and / or have at least one calming space.
- the present invention can be used in a particularly advantageous manner in a power generation unit, in particular for an electrically operated motor vehicle, in which case a rotatably mounted in the housing drive shaft is provided, on which rotates the rotary piston and which is coupled to an electromechanical energy converter.
- Figure 1 is a fragmentary longitudinal sectional view of a rotary piston machine according to the present invention.
- FIG. 2 is a fragmentary cross-sectional view of the rotary piston machine of FIG. 1.
- a piston chamber 12 is formed, which by a first side wall 14 and a second side wall 16 which in the axial direction (right / left direction in Fig. 1) spaced from each other and are aligned substantially parallel to each other, and one of these side walls 14 and 16 in the axial direction connecting circumferential wall 18 is limited.
- the peripheral wall 18 of the piston chamber 12 has a trochoidal inner running surface.
- the walls 14, 16, 18 of the piston chamber 12 are provided as from the rest of the machine housing 10 separately manufactured components.
- a drive shaft 20 is rotatably supported by means of bearing devices 22, 24.
- this drive shaft 20 has an eccentric section 26.
- This eccentric shaft 20 is coupled to an electromechanical energy converter (not shown) to form a power generator.
- the electromechanical energy converter is, for example, a generator which, during operation of the rotary piston machine, converts the mechanical rotational energy of the eccentric shaft 20 into electrical energy, for example in an electrochemical energy storage device (not shown), such as a battery, an accumulator or the like.
- the energy stored in the energy storage device can then be operated, for example, an electric motor that drives at least one wheel of a motor vehicle.
- the power generator with the rotary engine and the generator is used in this case as a so-called range extender, which recharges the battery of the electric motor vehicle when needed and so increases the range of the motor vehicle.
- a rotary piston 28 is arranged in the piston chamber 12 and rotates on the eccentric section 26 about the drive shaft 20, wherein a bearing device 33, for example in the form of a needle bearing, is provided between the eccentric section 26 of the drive shaft 20 and the rotary piston 28 ,
- the rotary piston 28 is formed substantially triangular, so that between its peripheral surface 31 and the peripheral wall 18 of the piston chamber 12, three working chambers 34 are formed. In these three working chambers 34 run in a known manner from the four cycles of the rotary piston engine to rotate the rotary piston.
- the rotary piston 28 has a first end face 29 (left in Fig. 1), which faces an inner side 15 of the first side wall 14 of the piston chamber 12, and a second end face 30 (right in Fig. 1), the inner side 17 of the second side wall 16 of the piston chamber 12 faces. Furthermore, the rotary piston 28 has a central bore 32, through which the drive shaft 20 is guided. This central bore 32 of the rotary piston 28 is formed with an internal toothing, which is in engagement with a gear 35 which is coaxial with the eccentric shaft 20 rotatably mounted on the housing 10. By the gear 35, the movement of the rotary piston 28 is controlled in the housing 10.
- the central bore 32 of the rotary piston 28 forms a volume which is in communication with an oil circuit and is supplied with lubricating oil during operation of the rotary piston engine by means of an oil pump.
- This lubricating oil is used to lubricate the bearings 22, 24, 26 of the eccentric shaft 20 in the housing 10 and the rotary piston 28 on the eccentric shaft 20th
- radial seals 58 are provided in a known manner to seal the three working chambers 34 against each other. As in Fig. 2 illustrated, these radial seals 58 are formed substantially strip-shaped and secured in correspondingly shaped grooves 57 in sealing bolts 56.
- the sealing bolts 56 each extend in a corner region substantially in the axial direction through the rotary piston 28. In addition, they are preferably contacted by the adjacent first side seals 36, 37 on the first and second end face 29, 30 of the rotary piston 28.
- first side seal 36 is attached to the first end face 29 of the rotary piston 28 for sealing the gap against the work spaces 34 and a first side seal 37 is attached to the second end face 30 of the rotary piston 28 for sealing the gap against the work spaces 34.
- first side seals 36, 37 are preferably resiliently biased against the respective side wall 14, 16 of the piston chamber 12.
- second side seals 38, 40 at the first end face 29 of the rotary piston 28 for sealing the gap against the central bore 32 and two radially spaced second side seals 39, 41 on the second end face 30 of the rotary piston 28 to Sealing the gap mounted against the central bore 32.
- These second side seals 38, 39, 40, 41 are preferably resiliently biased against the respective side wall 14, 16 of the piston chamber 12.
- the paired second side seals 38, 40 and 39, 41 are also referred to as oil seals or scraper rings.
- a first recess 42 is provided in the first end face 29 of the rotary piston 28 in the radial direction between the first side seal 36 and the radially outermost second side seal 38.
- a second recess 44 is provided in the second end face 30 of the rotary piston 28 in the radial direction between the first side seal 37 and the radially outermost second side seal 39.
- the rotary piston 28 may also be formed with a continuous cavity, which is the two - 1 -
- End faces 29, 30 of the rotary piston 28 in the radial direction between the first and second side seals 36, 37 and 38, 39 directly interconnects.
- a vent bore 46 is formed in the first side wall 14 of the piston chamber 12.
- This vent hole 46 is provided at a position lying radially between the first side seal 36 and the radially outer second side seal 38 at the time of ignition. In this way, the blowby gases, which overcome the first side seals 36, 37 on the rotary piston 28 due to the high pressure in the respective working space 34 after ignition and penetrate into the interspaces, can be discharged through the vent hole 46 in the first side wall 14.
- vent hole 46 is positioned in the radial direction within an inner envelope of the first side seal 37 (over a full revolution of the rotary piston 28) and outside an outer envelope of the radially outer second side seal 39 on the second end face 30 of the rotary piston 28.
- vent hole 46 in the radial direction and within an inner envelope of the base 57 for the radial seals 58 in the sealing bolt 56th
- vent hole 46 is preferably in the angular segment of the so-called cold arc of the piston chamber 12, in which no coolant holes are formed in the side walls 14, 16 is provided.
- this preferably has a substantially kidney-shaped cross-section in the concentric direction.
- the vent hole 46 in the first side wall 14 is connected via a connecting channel 48 with a vent channel 50 in the housing 10, via which the blowby gases are discharged from the housing 10.
- the venting channel 50 is connected to an oil separation device 52 in order to remove as completely as possible lubricating oils entrained by the blowby gases.
- the separated oils are supplied via an outflow channel (not shown) to an oil pan (not shown) which is connected to the lubricating oil circuit of the rotary piston machine.
- the inclusion of the separated lubricating oil in the oil pan, this lubricating oil is the lubricating oil circuit available. As a result, the lubricating oil requirement for the operation of the rotary piston machine can be kept low.
- the connecting channel 48 is formed between the vent hole 46 in the first side wall 14 of the piston chamber 12 and the vent passage 50 in the housing 10 in the flow direction of the blowby gases rising.
- the vent hole 46 itself may be provided with such a slope.
- the vent hole 46 and / or the connecting channel 48 may be equipped with a throttle or orifice device to selectively influence the cross section of the flow channel.
- the central bore 32 of the rotary piston 28 is connected via a further connecting channel 54 with the vent channel 50 in the housing 0.
- this further connection channel 54 is formed rising in the flow direction of the blowby gases. As a result, a deposition rate of the lubricating oil from the blow-by gases from the central bore 32 can be increased.
- vent channel 50, the connecting channel 48 and / or the further connecting channel 54 labyrinth-like portions and / or at least one calming space.
- the compact design of the embodiment of the rotary piston engine shown in Fig. 1 includes only a common vent channel 50 on the side of the first side wall 14 of the piston chamber 12 in the housing 10. In principle, it is also possible to provide on both sides of the piston chamber 12 venting channels 50 through which the blowby gases on both end faces 29, 30 of the rotary piston 28 can be removed.
- the pressure gradient between the recesses 42, 44, the central bore 32 and the venting channel 50 can be set in the desired manner.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT19622010A AT510166B1 (de) | 2010-11-25 | 2010-11-25 | Kreiskolbenbrennkraftmaschine |
AT19692010A AT510783B1 (de) | 2010-11-25 | 2010-11-25 | Rotationskolbenmaschine, insbesondere kreiskolbenmotor |
PCT/EP2011/005925 WO2012069198A1 (de) | 2010-11-25 | 2011-11-24 | Rotationskolbenmaschine, insbesondere kreiskolbenmotor |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2643553A1 true EP2643553A1 (de) | 2013-10-02 |
EP2643553B1 EP2643553B1 (de) | 2017-03-29 |
Family
ID=45047717
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11788378.5A Expired - Fee Related EP2643553B1 (de) | 2010-11-25 | 2011-11-24 | Rotationskolbenmaschine, insbesondere kreiskolbenmotor |
Country Status (4)
Country | Link |
---|---|
US (1) | US9534594B2 (de) |
EP (1) | EP2643553B1 (de) |
JP (1) | JP5964848B2 (de) |
WO (1) | WO2012069198A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018009770B3 (de) * | 2018-12-12 | 2020-02-06 | Paul Andreas Woelfle | Rotationskolbenmotor mit optimierter Ansaugluft-Innenkühlung |
US11788462B2 (en) | 2020-07-29 | 2023-10-17 | Astron Aerospace Llc | Rotary engine, parts thereof, and methods |
US11384684B2 (en) | 2019-08-09 | 2022-07-12 | Astron Aerospace Llc | Rotary engine, parts thereof, and methods |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3102682A (en) * | 1961-02-10 | 1963-09-03 | Nsu Motorenwerke Ag Neckarsulm | Liquid cooling for the rotor of a rotating-piston engine |
US3112870A (en) * | 1961-06-06 | 1963-12-03 | Curtiss Wright Corp | Air cooled rotor for rotary mechanism |
US3176915A (en) * | 1962-07-02 | 1965-04-06 | Curtiss Wright Corp | Cooling system for a rotary mechanism |
US3838951A (en) * | 1972-07-04 | 1974-10-01 | Nissan Motor | Rotor oil sealing arrangement for a rotary internal combustion engine |
DE2344198A1 (de) * | 1973-09-01 | 1975-03-06 | Fichtel & Sachs Ag | Dichtsystem fuer eine rotationskolbenbrennkraftmaschine |
US3849038A (en) | 1973-11-21 | 1974-11-19 | Toyo Kogyo Co | Rotary piston type engine |
US3881847A (en) * | 1973-11-30 | 1975-05-06 | Curtiss Wright Corp | Rotary expansion engine of the type having planetating rotor |
US3891357A (en) * | 1974-05-03 | 1975-06-24 | Curtiss Wright Corp | Rotary mechanism of the type having a planetating rotor |
JPS5255530Y2 (de) * | 1975-05-14 | 1977-12-15 | ||
JPS5255535Y2 (de) * | 1975-10-01 | 1977-12-15 | ||
JPS5849693B2 (ja) * | 1976-01-19 | 1983-11-05 | トヨタ自動車株式会社 | オイル消費量低減構造を備えたロ−タリピストンエンジン |
JPH0337301A (ja) * | 1989-07-01 | 1991-02-18 | Bandou Kiko Kk | ロータリーエンジン |
DE19527396C2 (de) | 1995-07-27 | 1998-11-12 | Pelz Peter | Drehkolben-Brennkraftmaschine |
US6164942A (en) * | 1997-12-24 | 2000-12-26 | Moller International | Rotary engine having enhanced charge cooling and lubrication |
JP2000274225A (ja) * | 1999-03-25 | 2000-10-03 | Toyota Autom Loom Works Ltd | ブローバイガス用オイルセパレータ |
DE102004008313B4 (de) * | 2004-02-20 | 2014-01-16 | Wankel Super Tec Gmbh | Kreiskolbenbrennkraftmaschine mit einer verbesserten Innendichtung |
US8177536B2 (en) * | 2007-09-26 | 2012-05-15 | Kemp Gregory T | Rotary compressor having gate axially movable with respect to rotor |
GB2457456A (en) * | 2008-02-13 | 2009-08-19 | David Walker Garside | A Rotary Piston Internal Combustion Engine Cooling Arrangement |
JP5104440B2 (ja) * | 2008-03-19 | 2012-12-19 | マツダ株式会社 | エンジンの燃料供給方法および供給装置 |
-
2011
- 2011-11-24 EP EP11788378.5A patent/EP2643553B1/de not_active Expired - Fee Related
- 2011-11-24 JP JP2013540266A patent/JP5964848B2/ja not_active Expired - Fee Related
- 2011-11-24 WO PCT/EP2011/005925 patent/WO2012069198A1/de active Application Filing
-
2013
- 2013-05-24 US US13/902,700 patent/US9534594B2/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2012069198A1 * |
Also Published As
Publication number | Publication date |
---|---|
US20130336829A1 (en) | 2013-12-19 |
WO2012069198A1 (de) | 2012-05-31 |
JP2014500927A (ja) | 2014-01-16 |
US9534594B2 (en) | 2017-01-03 |
JP5964848B2 (ja) | 2016-08-03 |
EP2643553B1 (de) | 2017-03-29 |
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