WO2016192711A1 - Axialkolbenmotor - Google Patents
Axialkolbenmotor Download PDFInfo
- Publication number
- WO2016192711A1 WO2016192711A1 PCT/DE2016/100238 DE2016100238W WO2016192711A1 WO 2016192711 A1 WO2016192711 A1 WO 2016192711A1 DE 2016100238 W DE2016100238 W DE 2016100238W WO 2016192711 A1 WO2016192711 A1 WO 2016192711A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- control piston
- piston
- combustion chamber
- firing channel
- control
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02G—HOT GAS OR COMBUSTION-PRODUCT POSITIVE-DISPLACEMENT ENGINE PLANTS; USE OF WASTE HEAT OF COMBUSTION ENGINES; NOT OTHERWISE PROVIDED FOR
- F02G3/00—Combustion-product positive-displacement engine plants
- F02G3/02—Combustion-product positive-displacement engine plants with reciprocating-piston engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01B—MACHINES OR ENGINES, IN GENERAL OR OF POSITIVE-DISPLACEMENT TYPE, e.g. STEAM ENGINES
- F01B3/00—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F01B3/0002—Reciprocating-piston machines or engines with cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
-
- 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
- F02B75/00—Other engines
- F02B75/26—Engines with cylinder axes coaxial with, or parallel or inclined to, main-shaft axis; Engines with cylinder axes arranged substantially tangentially to a circle centred on main-shaft axis
Definitions
- the invention relates to an axial piston motor with internal continuous
- Combustion comprising a continuously operating combustion chamber and at least two working cylinders which are each connected via a firing channel to the combustion chamber and in which a working piston is arranged to move back and forth, each firing channel in each case by a reciprocable control piston occlusive and apparently is.
- Such axial piston motors are known, for example, from WO 2009/062473 A2 and from WO 2011/009454 A2, where complex measures are disclosed there with which the service life of the control piston is to be increased, which, in each case, the flow of working medium from the combustion chamber into the working piston and thus come into contact with the very hot working fluid and subject to high wear.
- the invention is based on the basic knowledge that the life of the control piston can be increased by the fact that the directly loaded by the extremely high heat components are designed so that they dissipate the heat directly and directly by extremely well are formed thermally conductive.
- Axial piston engine with continuous combustion which comprises a continuously operating combustion chamber and at least two working cylinders which are each connected via a firing channel with the combustion chamber and in which a working piston is arranged to reciprocate, each firing channel in each case by a reciprocable control piston Verschdorf- and apparently, thereby increasing that the control piston in each case a control piston body and a shot channel side carried by the control piston body, made of a material with a ⁇ higher thermal conductivity ⁇ than the control piston body having trained control piston cover. Due to the good or against the control piston body higher thermal conductivity ⁇ of the control piston cover, the heat which acts on the control piston shot channel side, to be dissipated to a greater extent than this is the case with conventional control piston.
- the other components of the control piston continue to be made of very stable and wear-resistant material, since they are not so highly thermally stressed.
- the life of the control piston in an axial piston internal combustion engine comprising a continuously operating combustion chamber and at least two working cylinders which are each connected via a firing channel with the combustion chamber and in which a working piston is arranged to move back and forth, wherein each firing channel is closed by a reciprocable control piston and is apparent
- the control piston an impact surface and / or a guide surface made of a material with a ⁇ higher thermal conductivity ⁇ than the Has shot channel remote from the control piston.
- This embodiment also ensures that the surfaces coming into direct contact with the hot working medium, in particular the baffle surface and / or the guide surface, are subject to a lower heat load due to their good thermal conductivity.
- the term "guide surface” is understood to mean a surface of the control piston which comes into direct contact with the working medium and has a component essentially parallel to the weft direction or parallel to the main flow direction of the working medium through the firing channel.
- the ⁇ - ie the difference in the thermal conductivity - more than 20 W / (m K), which causes a correspondingly good thermal relief or a corresponding increase in the life. It is understood that the difference in the thermal conductivity can also be more than 25 W / (m K) or more than 30 W / (m K).
- an axial piston internal continuous combustion engine comprising a continuously operating combustion chamber and at least two working cylinders which are each connected via a firing channel to the combustion chamber and in which a working piston is arranged to move back and forth, each firing channel in each case by a closable and apparently movable control piston, and the life of the control piston can be increased if the control piston each having a control piston body and a shot channel side of the control piston body carried, made of a material having a thermal conductivity over 60 W / (m K) formed Steuerkolbendeckel , With such thermal conductivity, under the operating conditions in an axial piston internal combustion engine in which the hot working fluid is always in direct contact with the control piston cover, it can be ensured that the thermal load for both the control piston cover and the control piston body itself is sufficiently low to ensure a sufficient life. Ultimately, it does not matter if briefly the control piston body itself comes into contact with the hot working medium.
- Combustion comprising a continuously operating combustion chamber and at least two working cylinders which are each connected via a firing channel to the combustion chamber and in which a working piston is arranged to move back and forth, each firing channel in each case by a reciprocable control piston occlusive and apparently is, the life of the control piston can be increased if the control piston has a baffle and / or a guide surface made of a material having a thermal conductivity above 60 W / (m K).
- the design of the baffle or the guide surface ensures due to the good thermal conductivity that the thermal load of the baffle or the guide surface, which during operation of the axial piston very often, if not always, with the Hot working medium in contact, can be reduced to a necessary level.
- baffle and the guide surface not necessarily both must be formed of a corresponding material, since the corresponding advantages already present, if only one of the surfaces of a corresponding material is formed. It is also understood that the baffle and the guide surface need not necessarily be formed on a control piston cover. Here it is conceivable, for example, that the baffle surface or the guide surface are represented by appropriate coatings or by suitable inlays or by suitable inserts.
- Combustion comprising a continuously operating combustion chamber and at least two working cylinders, each connected to the combustion chamber via a firing channel and in each of which a working piston is arranged to be movable back and forth, each firing channel being each characterized by a reciprocable control piston wear and an increased life of the control piston, when the axial piston motor is characterized in that the control piston each having a control piston body and a weftkanalmon carried by the control piston body, formed of copper or aluminum control piston cover.
- an axial piston motor with internal continuous combustion comprising a continuously operating combustion chamber and at least two working cylinders which are each connected via a firing channel with the combustion chamber and in which a working piston is arranged to reciprocate, each firing channel respectively through a reciprocating control piston occludes and apparently, control piston with increased life, when the control piston has a baffle and / or a guide surface made of copper or aluminum.
- the choice of materials with the correspondingly good thermal conductivity reduces the thermal load on the baffle surface or the guide surface, which in itself is correspondingly advantageous and does not necessarily have to be accompanied by the use of a separate control piston cover in order to achieve the associated advantages.
- the copper and / or the aluminum is provided with a protective layer, in particular to avoid unnecessary wear, such as oxidation of the copper, for this purpose, in particular nickel plating or chrome plating in question, which is very inexpensive to implement.
- a protective layer in particular to avoid unnecessary wear, such as oxidation of the copper, for this purpose, in particular nickel plating or chrome plating in question, which is very inexpensive to implement.
- other protective layers such as a ceramic sprayed layer or the like may be used as long as the thermal conductivity is not lowered too much.
- control piston cover or that the baffle and / or the
- the spray cooling preferably takes place from a side facing away from the firing channel, so that a material separation between the working medium and the cooling medium can be ensured by the control piston.
- the spray cooling can be done for example by water or liquid metal, which is either less effective or very expensive. Particularly preferred is a spray cooling by oil.
- the spray cooling can be done with oil from a control pressure chamber which is arranged on the side facing away from the shot channels of the control piston and in which the control piston are moved back and forth, which has the advantage that the control pressure chamber - as however from the state the technique is already known - can be placed under a pressure which corresponds approximately to the combustion chamber pressure, so that any leakage currents that are present at the control piston between the combustion chamber and the control pressure chamber can be limited to a minimum. It is understood that, accordingly, the control pistons are preferably sealed within the control piston guide as far as possible.
- control piston body is preferably dimensioned in relation to the control piston guide such that it does not leave the control piston guide in the firing channel in all operating positions on the combustion chamber side. In this way, it can be prevented that the control piston body comes into direct contact with the working medium which flows out of the combustion chamber.
- the control piston leaves the control piston guide into the firing channel in individual operating positions, which, however, has not proven to be so critical thermally.
- Firing channel opening control piston guide is arranged, the control piston cover such be configured so that it closes in all operating positions, the control piston guide combustion chamber side to the firing channel, which accordingly protects the control piston body from the hot working fluid.
- the control piston cover On the side facing away from the combustion chamber of the firing channel such a degree does not necessarily have to be present in all operating positions, since this - as already explained above - is not so critical thermally.
- control piston body Sufficient stability of the control piston body can be ensured if it is made of steel or titanium.
- the lower thermal conductivity can be accepted at this point because of the dimensional stability and because of the overall stability of assemblies made of steel or titanium, as long as the heat through the respective control piston cover or through the baffle or the guide surface can be dissipated sufficiently quickly enough.
- the control piston body may be formed of titanium steel, which has been found to be particularly advantageous as a carrier of the well-conductive control piston cover or the baffle and / or the guide surface.
- control piston body of aluminum, which allows high working speeds due to its low specific weight and its high stability in terms of weight, in which case the heat conductivity shot channel side by the use of copper or by the use of suitable aluminum alloys with correspondingly higher thermal conductivity should be adjusted.
- the flow conditions within the firing channel can be influenced in a particularly favorable manner if a shoulder surface facing the firing channel and angled with respect to the deflecting surface is provided on the side of the guide surface facing away from the combustion chamber.
- a shoulder surface facing the firing channel and angled with respect to the deflecting surface is provided on the side of the guide surface facing away from the combustion chamber.
- the complementary region of the weft channel in this way, although an angled area should initially obstruct a flow, a good flow of working medium can be achieved, which on the one hand reduces the thermal load on the control piston and on the other hand any power losses of the axial piston motor minimized.
- a suitable choice of the angle and - in a suitable embodiment - also a corresponding adjustment of the complementary region of the weft channel can ensure that the firing channel then open very quickly with a large movement in the control piston with a large cross-section to the hot working medium of to transfer the combustion chamber into the corresponding working cylinder.
- the guide surface and the shoulder surface are arranged at an obtuse angle, ie an angle between 90 ° and 180 ° to each other.
- a blunt angle has not proved to be so advantageous in this respect, while an acute angle is disadvantageous because it leads to strong turbulence and consequently to high power losses.
- a corresponding angled arranged shoulder surface is also independent of the other features of the present invention in an axial piston internal continuous combustion engine, comprising a continuously operating combustion chamber and at least two working cylinders, each via a firing channel with the Combustion chamber are connected and in each of which a working piston is arranged to move back and forth, each firing channel in each case by a reciprocable control piston occlusive and apparently, correspondingly advantageous.
- Figure 1 is a schematic sectional view through an axial piston motor as the first
- Figure 2 shows the axial piston of Figure 1 in a cross section through the combustion chamber, the shot channels and the working cylinder.
- FIG. 3 a perspective view of the alternative control pistons illustrated in FIGS. 1 and 2;
- FIG. 4 shows the control piston according to FIG. 3 in a side view
- Figure 5 shows the control piston of Figures 3 and 4 in a plan view
- FIG. 6 shows the control piston according to FIGS. 3 to 5 in a section along the line VI-VI in FIG.
- FIG. 5 is a diagrammatic representation of FIG. 5.
- the axial piston motor 10 shown in FIGS. 1 and 2 has a
- the working piston 320 are on connecting rod 510 with compressor piston 420 on a
- Compressor side 40 connected, which in turn are movable in compressor cylinders 410 back and forth.
- the connecting rods 510 drive in a known per se and therefore unspecified explained manner a driven pulley 520, which in turn sits on an output shaft 522, so that in this way mechanical energy, which is obtained by the power piston 320, is available ,
- Compressor cylinders 410 compressed air, or other oxidizer used for combustion, is supplied from the compressor side 40 via an oxidizer inlet 260 through a heat exchanger 600 of the combustor 200, where it burns together with fuel 222, 242 in the combustor and from there be abandoned on the firing channels 700 the working cylinders 310.
- the combustion chamber 200 includes a
- Main combustion chamber 210 and a pre-combustion chamber 230 wherein the main combustion chamber 210 via a main nozzle 220 fuel 222 is supplied.
- the main combustion chamber 210 is also supplied with the oxidant, generally air, required for the combustion of the fuel 222.
- Main combustion chamber 210 of the combustion chamber 200 can be oxidized as much as possible thermally decomposed in a processing chamber 250, which by pre-combustion with a pre-combustion chamber 230, which opens into the processing chamber 250, and with a pre-nozzle 240 for fuel 242 and with an associated Oxidatorzutechnisch 244th , which in turn is also connected to the Oxidatorzutechnisch 260, is realized. In this way, a very complete and, above all, low-emission combustion can be realized.
- control pistons 710 include, as can be seen in particular with reference to the embodiment shown in Figures 3 to 6, each having a control piston body 712 which forms a first part 713 of the control piston 710 and is formed in this embodiment of titanium steel.
- control pistons 710 each comprise control piston cover 714, which form a further part 715 of the control piston 710 and are formed in this embodiment of copper.
- the control piston covers 714 each include a baffle 716, which is the
- Combustion chamber 200 and are directed substantially perpendicular to the firing channel 700 and perpendicular to the main flow direction of the working medium through the firing channel 700 through.
- the control piston covers 714 each include a guide surface 718, which are aligned substantially parallel to the firing channel 700 and parallel to the main flow direction of the working medium through the firing channel 700 therethrough.
- the baffles and fins are each formed of copper.
- the control piston cover is nickel-plated and thus carries a protective layer against undesirable oxidation.
- the control piston 710 each have an impeller 735, which in a
- Control disc 740 runs, which in turn sits on the output shaft 522, whereby the movement of the control piston 710 with respect to the movement of the working piston 320 and the compression of the piston 420 can be synchronized.
- control disk 740 is disposed in a control pressure chamber 750 when the space in which the control disk 740 is found is appropriately sealed, which is not mandatory in other embodiments.
- the pressure in the control pressure chamber 750 can essentially correspond to the pressure of the compressed oxidant, that is to say essentially the pressure in the oxidizer feed line 260, which roughly corresponds to the pressure in the main combustion chamber 210. In this way, any leaks past the control piston 710 can be reduced to a minimum.
- the respective control piston cover 714 or the associated part 715 of the control piston 710 can be readily injection-cooled from the inside, so that oil which is conducted into the control pressure chamber 750 can directly serve a corresponding cooling.
- control piston 710 has a shoulder surface 720 which is disposed at an obtuse angle to the guide surface 718, so that a changed wall of the control piston 710 with respect to the firing channel 700 results, which leads to improved flow conditions with a suitable embodiment of the complementary firing channel 700, compared to the control piston of Figures 1 and 2 leads.
- Axial piston motor 420 Compressor piston Combustion chamber area
- Main combustion chamber 600 heat exchanger main nozzle
- Control disc Compressor cylinder 750 Control pressure chamber
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Pistons, Piston Rings, And Cylinders (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112016002409.6T DE112016002409A5 (de) | 2015-05-29 | 2016-05-24 | Axialkolbenmotor |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102015108542.9 | 2015-05-29 | ||
DE102015108542.9A DE102015108542A1 (de) | 2015-05-29 | 2015-05-29 | Axialkolbenmotor |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016192711A1 true WO2016192711A1 (de) | 2016-12-08 |
Family
ID=56292407
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2016/100238 WO2016192711A1 (de) | 2015-05-29 | 2016-05-24 | Axialkolbenmotor |
Country Status (2)
Country | Link |
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DE (2) | DE102015108542A1 (de) |
WO (1) | WO2016192711A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE112019003348A5 (de) * | 2018-07-04 | 2021-03-25 | GETAS GESELLSCHAFT FüR THERMODYNAMISCHE ANTRIEBSSYSTEME MBH | Axialkolbenmotor |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1163681A (en) * | 1967-04-29 | 1969-09-10 | Nsu Motorenwerke Ag | Rotary Piston Internal Combustion Engine. |
US3577729A (en) * | 1969-03-11 | 1971-05-04 | Glenn B Warren | Reciprocating internal combustion engine with constant pressure combustion |
GB1253279A (en) * | 1969-02-25 | 1971-11-10 | Southwick Walbridge Briggs | Internal combustion engine |
DE2745921A1 (de) * | 1976-10-26 | 1978-04-27 | Georg Karl Buergel | Brennkraftmaschine mit heizkammer |
WO2009062473A2 (de) | 2007-11-12 | 2009-05-22 | Ulrich Rohs | Axialkolbenmotor und verfahren zum betrieb eines axialkolbenmotors |
WO2011009454A2 (de) | 2009-07-24 | 2011-01-27 | GETAS GESELLSCHAFT FüR THERMODYNAMISCHE ANTRIEBSSYSTEME MBH | Axialkolbenmotor, verfahren zum betrieb eines axialkolbenmotors sowie verfahren zur herstellung eines wärmeübertragers eines axialkolbenmotors |
-
2015
- 2015-05-29 DE DE102015108542.9A patent/DE102015108542A1/de not_active Withdrawn
-
2016
- 2016-05-24 WO PCT/DE2016/100238 patent/WO2016192711A1/de active Application Filing
- 2016-05-24 DE DE112016002409.6T patent/DE112016002409A5/de not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1163681A (en) * | 1967-04-29 | 1969-09-10 | Nsu Motorenwerke Ag | Rotary Piston Internal Combustion Engine. |
GB1253279A (en) * | 1969-02-25 | 1971-11-10 | Southwick Walbridge Briggs | Internal combustion engine |
US3577729A (en) * | 1969-03-11 | 1971-05-04 | Glenn B Warren | Reciprocating internal combustion engine with constant pressure combustion |
DE2745921A1 (de) * | 1976-10-26 | 1978-04-27 | Georg Karl Buergel | Brennkraftmaschine mit heizkammer |
WO2009062473A2 (de) | 2007-11-12 | 2009-05-22 | Ulrich Rohs | Axialkolbenmotor und verfahren zum betrieb eines axialkolbenmotors |
WO2011009454A2 (de) | 2009-07-24 | 2011-01-27 | GETAS GESELLSCHAFT FüR THERMODYNAMISCHE ANTRIEBSSYSTEME MBH | Axialkolbenmotor, verfahren zum betrieb eines axialkolbenmotors sowie verfahren zur herstellung eines wärmeübertragers eines axialkolbenmotors |
Also Published As
Publication number | Publication date |
---|---|
DE102015108542A1 (de) | 2016-12-01 |
DE112016002409A5 (de) | 2018-03-15 |
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