WO2012013462A1 - Moteur à piston pouvant être entraîné par le biais d'un processus de force motrice à vapeur - Google Patents

Moteur à piston pouvant être entraîné par le biais d'un processus de force motrice à vapeur Download PDF

Info

Publication number
WO2012013462A1
WO2012013462A1 PCT/EP2011/061409 EP2011061409W WO2012013462A1 WO 2012013462 A1 WO2012013462 A1 WO 2012013462A1 EP 2011061409 W EP2011061409 W EP 2011061409W WO 2012013462 A1 WO2012013462 A1 WO 2012013462A1
Authority
WO
WIPO (PCT)
Prior art keywords
piston
rod
cylinder
cylinder bore
crankshaft
Prior art date
Application number
PCT/EP2011/061409
Other languages
German (de)
English (en)
Inventor
Nadja Eisenmenger
Hans-Christoph Magel
Andreas Wengert
Original Assignee
Robert Bosch 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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2012013462A1 publication Critical patent/WO2012013462A1/fr

Links

Classifications

    • 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
    • F01B9/00—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups
    • F01B9/02—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with crankshaft
    • F01B9/023—Reciprocating-piston machines or engines characterised by connections between pistons and main shafts and not specific to preceding groups with crankshaft of Bourke-type or Scotch yoke

Definitions

  • the invention relates to a drivable via a steam power piston engine. Specifically, the invention relates to a piston engine which can be driven by a steam power process and serves to utilize the waste heat of an internal combustion engine.
  • the piston engine according to the invention with the features of claim 1 has the advantage that an advantageous operation of the piston engine is also possible when using water or other, poorly lubricating working fluids. This has an effect, inter alia, on improved efficiency and a longer service life of the piston engine.
  • the piston engine can be combined with an internal combustion engine to convert the waste heat of the internal combustion engine into additional drive energy.
  • Such a combination for waste heat utilization is particularly efficient in a commercial vehicle, since here the internal combustion engine gives off a large power and thus a large amount of heat for steam generation is available. As a result, the fuel consumption can be reduced.
  • Piston engine as can be achieved for the internal combustion engine and thus the mechanical energy emitted by the piston engine directly to the crankshaft of the
  • Diesel engine or gas engine are delivered.
  • a piston engine can be conveniently mounted in a limited space on an internal combustion engine.
  • the steam process can be configured as an ORC process (Organic Rankine Cycle Process).
  • ORC process Organic Rankine Cycle Process
  • the thermal energy of the waste heat is converted into mechanical energy via the ORC process.
  • the waste heat from an exhaust gas of the internal combustion engine or an exhaust gas recirculation can be transmitted via a heat exchanger to the working fluid of the ORC process in an advantageous manner.
  • the working fluid may in this case be based at least essentially on water, alcohol or a mixture of the two.
  • the working fluid can be evaporated.
  • This steam can then be expanded in the piston machine serving as an expansion machine, whereby the mechanical energy is recovered.
  • the working fluid is then cooled in a condenser and fed to a pump.
  • the working fluid can thereby be compressed in the liquid phase by the pump to the pressure level for re-evaporation at the heat exchanger. As a result, the cycle is closed.
  • crankshaft space is guided and that the bearing between the cylinder bore and the crankshaft space is arranged.
  • the crankshaft space can in this case be filled at least partially with an oil serving as a lubricant. About the oil from the crankshaft space a certain lubrication of the bearing is possible.
  • the bearing point advantageously adjoins the crankshaft space.
  • at least one sealing element is provided, which is arranged at the bearing point, and that the sealing element forms a seal between the bearing point and the cylinder bore.
  • a seal against the lubricant from the crankshaft space which also lubricates the bearing, be formed.
  • the cylinder piston limits the working space and on the other hand a pressure-relieved space, that the rod extends through the pressure-relieved space and that the bearing point with the lubricating oil from the crankshaft space is lubricated.
  • the pressure-relieved room is a further separation of the working space and thus provided in the work space
  • vaporous working fluid and the crankshaft space and thus the lubricating oil possible.
  • the under a certain pressure, vaporous working fluid is not performed directly to the bearing or provided in front of the bearing seal when it escapes due to leakage or the like on the cylinder piston from the working space.
  • the media separation between the working fluid and the lubricating oil can be further improved. This is also an intrusion of
  • the bearing is formed by a bearing bush and that guided out of the cylinder bore rod is guided through the bearing bush.
  • the bearing bush can be formed from a suitable material.
  • Bearing bush can be reduced advantageously occurring lateral forces on the cylinder piston. Thus, improved storage and reduced wear can be achieved.
  • the rod is on the one hand connected to the cylinder piston and on the other hand at least indirectly connected to a crankshaft, wherein the rod forms a frictional connection between the cylinder piston and the crankshaft.
  • the bearing point is advantageously configured such that it at least substantially absorbs transverse forces transmitted by the crankshaft to the rod.
  • a scotch yoke drive for the piston engine can thus take place an advantageous storage of a crank loop of the scotch yoke drive.
  • the bearing is lubricated with oil, as is possible for the rest of the crank mechanism.
  • This oil-lubricated is particularly advantageous
  • At least one further cylinder bore, another cylinder piston arranged in the cylinder bore has a cylinder bore in the cylinder bore
  • Cylinder bore with respect to a rotation axis of the crankshaft are arranged opposite to each other and wherein the crankshaft on the one hand at least indirectly connected to the rod and on the other hand at least indirectly connected to the other rod. It is also advantageous that a crank loop is provided, that a arranged on the crankshaft sliding block is provided, which is inserted into a slot-shaped recess of the crank loop, on the one hand, the rod connecting the cylinder piston with the crank loop and on the other hand, the other Stake the rest
  • Fig. 1 shows a piston machine in a schematic sectional view according to a first embodiment of the invention
  • Fig. 2 shows a piston machine in a schematic sectional view according to a second embodiment of the invention.
  • FIG. 1 shows a piston engine 1 in a schematic representation according to a first exemplary embodiment of the invention.
  • the piston engine 1 is driven by a steam power process.
  • the piston engine 1 can be used especially in an internal combustion engine of a motor vehicle to use the waste heat of the internal combustion engine.
  • the piston engine 1 then converts the waste heat into mechanical energy, which can serve, for example, as additional drive energy or for driving an auxiliary aggregate, in particular an electric generator.
  • the piston engine 1 according to the invention is also suitable for others
  • the piston engine 1 has a housing part 2 and cylinders 3, 4 connected to the housing part 2.
  • the cylinder 3 has a cylinder bore 5 in which a
  • Cylinder piston 6 is arranged.
  • the cylinder piston 6 limited in the cylinder bore 5 on the one hand a working space 7 and on the other hand, a space 8.
  • the space 8 can serve as a working space or as a pressure-relieved space.
  • a valve-controlled inlet 9 and a valve-controlled outlet 10 are provided for the working space 7. Via the inlet 9 compressed, gaseous working fluid, in particular water vapor, can be guided into the working space 7.
  • gaseous working fluid in particular water vapor
  • an actuating force is exerted on the cylinder piston 6, which acts in a direction 1 1.
  • the cylinder piston 6 is connected via a rod 12 indirectly with a crankshaft journal 13 of a crankshaft 14. As a result, the force can be transmitted from the cylinder piston 6 to the crankshaft journal 13.
  • a valve-controlled inlet 15 and a valve-controlled outlet 16 may be provided for the space 8.
  • compressed, gaseous working fluid can also be introduced into the space 8 in order to relax it and thereby actuate the cylinder piston 6 counter to the direction 1 1.
  • the control of the intake valves 9, 15 and the exhaust valves 10, 16 can in this case be carried out in a suitable manner to achieve an alternate actuation of the cylinder piston 6.
  • the rod 12 is mounted on a bearing 17.
  • the bearing 17 is formed by a bearing bush 18 which is inserted into a housing part 19 and connected thereto.
  • the rod 12 extends through both the space 8 and through the bearing bush 18 at the bearing point 17.
  • the rod 12 extends into a crankshaft space 20 in the housing part 2, in which the crankshaft 14 is arranged.
  • a lubricant in particular an oil.
  • the crankshaft space 20 may be connected to a lubricant circuit. From the crankshaft space 20 ago some lubrication of the bearing bush 18 is possible to supply the storage of the rod 12 in the bearing bush 18 with the oil. As a result, frictional forces between the bearing bush 18 and the rod 12 are reduced.
  • a crank loop 21 is arranged in this embodiment, which has a slot-shaped recess 22.
  • a sliding block 23 is inserted, which is slidably mounted in the recess 22.
  • the sliding block 23 is in this case arranged on the crankshaft journal 13 of the crankshaft 14 in order to enable an operative connection between the crankshaft journal 13 and the crank loop 21.
  • a connection of the rod 12 via the crank loop 21 and the sliding block 23 is formed with the crankshaft journal 13.
  • the further cylinder 4 is designed according to the cylinder 3.
  • the further cylinder 4 has a further cylinder bore 5 ', a further cylinder piston 6' arranged in the cylinder bore 5 ', a further working space 7' delimited by the cylinder piston 6 and a further space 8 'bounded by the cylinder piston 6.
  • a valve-controlled inlet 9 'and a valve-controlled outlet 10' are provided for the further working space T.
  • Working space T introduced compressed, gaseous pressurized fluid is an actuation of the cylinder piston 6 'against the direction of 1 1'. Since the cylinder piston 6 'via another rod 12' is also connected to the crank loop 21, the work
  • a piston machine 1 can be realized with a Scotch-Yoke crank mechanism, in which serving as a transmission rods rods 12, 12 'at the bearings 17, 17' are mounted.
  • the cylinder pistons 6, 6 ' are arranged opposite one another and transmit their force to the crankshaft 14 via the crank-wheel drive.
  • the crank loop 21 is mounted on the rods 12, 12 'at the bearings 17, 17'.
  • This mounting of the crank loop 21 is particularly with a designed as a two-cylinder steam engine piston engine 1 with opposite
  • Crank loop 21 can be well supported.
  • Fig. 2 shows the piston machine 1 shown in Fig. 1 according to a second embodiment.
  • the bearings 17, 17 'for supporting the rods 12, 12' are formed directly on the housing parts 19, 19 '. Separate bushings, as provided in the embodiment shown in FIG. 1, can be omitted hereby.
  • the sealing elements 24, 25 and the sealing elements 24 ', 25' are designed annular, which on the one hand surround the rod 12 and on the other hand the rod 12 'on its outer side.
  • the sealing elements 24, 25 form a seal between the space 8 and the bearing 17.
  • According to the sealing elements 24 ', 25' form a seal between the space 8 'and the bearing 17'. This is a
  • the spaces 8, 8 'in this embodiment are designed as pressure-relieved spaces. Inlets for the spaces 8, 8 ', as they are formed in FIG. 1 by inlets 15, 15', are omitted here.
  • the outlets 16, 16 ' are here with a Low pressure range of the steam circuit connected to due due to leakage from the working spaces 7, 7 'in the spaces 8, 8' reaching working fluid returned to the steam circuit.
  • the pressure-relieved spaces 8, 8 ' the media separation is further improved. Because between the working spaces 7, 7 ', through which the vaporous
  • the bearings 17, 17 ' are located specifically in this embodiment in the oil area and it can be a particularly good lubrication with oil.
  • the sealing elements 24, 25, 24 ', 25' for separating the lubricating oil from the working fluid in the spaces 8, 8 ' are preferably arranged directly after the bearings 17, 17' on the rods 12, 12 'and have a smaller inner diameter than the cylinder piston 6, 6 'on. This reduces the frictional losses on the sealing elements 24, 25, 24 ', 25'.
  • one or more sealing elements 24, 25, 24 ', 25' can be provided in each case.

Abstract

L'invention concerne un moteur à piston (1) pouvant être entraîné par le biais d'un processus de force motrice à vapeur et servant notamment à récupérer la chaleur perdue d'un moteur à combustion interne. Ledit moteur à piston comprend au moins un alésage de cylindre (5), un piston de cylindre (6) monté dans l'alésage de cylindre (5) et délimitant un espace de travail (8) et une tige (21) reliée au piston de cylindre (6) et guidée hors de l'alésage de cylindre (5). A cet effet, un point de support (37) sert à recevoir la tige (21) et le piston de cylindre (6) relié à la tige (21). La tige (12) peut relier le piston de cylindre (6) à un vilebrequin (14) disposé dans un carter de vilebrequin (20). Le montage de tige (12) sur le point de support (17) permet de réduire les forces de cisaillement exercées sur le piston de cylindre (6). Les phénomènes d'usure peuvent ainsi être réduits et la durée de vie peut être augmentée.
PCT/EP2011/061409 2010-07-28 2011-07-06 Moteur à piston pouvant être entraîné par le biais d'un processus de force motrice à vapeur WO2012013462A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010038546.8 2010-07-28
DE201010038546 DE102010038546A1 (de) 2010-07-28 2010-07-28 Über einen Dampfkraftprozess antreibbare Kolbenmaschine

Publications (1)

Publication Number Publication Date
WO2012013462A1 true WO2012013462A1 (fr) 2012-02-02

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2011/061409 WO2012013462A1 (fr) 2010-07-28 2011-07-06 Moteur à piston pouvant être entraîné par le biais d'un processus de force motrice à vapeur

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DE (1) DE102010038546A1 (fr)
WO (1) WO2012013462A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014128266A1 (fr) 2013-02-21 2014-08-28 Exoes Système de conversion d'énergie thermique des gaz d'échappement d'un moteur à combustion
JP2016519736A (ja) * 2013-03-15 2016-07-07 プライム グループ アライアンス, リミテッド ライアビリティ カンパニーPrime Group Alliance, LLC 非粘性層シーリングを有する対向ピストン内燃機関
CN111878176A (zh) * 2020-08-26 2020-11-03 游涛 双向可逆流体动力发动机

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017123119A1 (de) 2017-10-05 2019-04-11 Ficht Fahrzeug + Marinetechnik Gmbh & Co. Kg Hubkolben-Expansionsmaschine, insbesondere Dampfmotor und Arbeitszylinder hierfür

Citations (4)

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Publication number Priority date Publication date Assignee Title
GB218308A (en) * 1923-06-26 1924-10-02 Gottfried Hillekum Improvements in internal-combustion engines
DE920758C (de) * 1951-12-21 1954-11-29 Heinz Boerner Zweitaktbrennkraftmaschine
US4889039A (en) * 1988-10-17 1989-12-26 Miller Bernard F Gas compressor with labyrinth sealing and active magnetic bearings
US20020029571A1 (en) * 1999-07-19 2002-03-14 Gray Charles L. High efficiency, air bottoming engine

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB218308A (en) * 1923-06-26 1924-10-02 Gottfried Hillekum Improvements in internal-combustion engines
DE920758C (de) * 1951-12-21 1954-11-29 Heinz Boerner Zweitaktbrennkraftmaschine
US4889039A (en) * 1988-10-17 1989-12-26 Miller Bernard F Gas compressor with labyrinth sealing and active magnetic bearings
US20020029571A1 (en) * 1999-07-19 2002-03-14 Gray Charles L. High efficiency, air bottoming engine

Non-Patent Citations (2)

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Title
JIM MEAD: "What's in your Firebox....", 9 July 2010 (2010-07-09), XP002658524, Retrieved from the Internet <URL:http://www.smokstak.com/forum/showthread.php?t=80190> [retrieved on 20110902] *
ROBERT H THURSTON: "A History of the Growth of the Steam Engine - Chapter VI - The Steam Engine of Today", 16 December 1996 (1996-12-16), XP002658117, Retrieved from the Internet <URL:http://www.history.rochester.edu/steam/thurston/1878/Chapter6.html> [retrieved on 20110902] *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014128266A1 (fr) 2013-02-21 2014-08-28 Exoes Système de conversion d'énergie thermique des gaz d'échappement d'un moteur à combustion
JP2016519736A (ja) * 2013-03-15 2016-07-07 プライム グループ アライアンス, リミテッド ライアビリティ カンパニーPrime Group Alliance, LLC 非粘性層シーリングを有する対向ピストン内燃機関
EP2971645A4 (fr) * 2013-03-15 2016-12-28 Prime Group Alliance Llc Moteur à combustion interne à pistons opposés à couche d'étanchéité non visqueuse
AU2014233020B2 (en) * 2013-03-15 2018-07-12 Prime Group Alliance, Llc Opposed piston internal combustion engine with inviscid layer sealing
JP2018173081A (ja) * 2013-03-15 2018-11-08 プライム グループ アライアンス, リミテッド ライアビリティ カンパニーPrime Group Alliance, LLC 非粘性層シーリングを有する対向ピストン内燃機関
JP2020012468A (ja) * 2013-03-15 2020-01-23 プライム グループ アライアンス, リミテッド ライアビリティ カンパニーPrime Group Alliance, LLC 非粘性層シーリングを有する対向ピストン内燃機関
CN111878176A (zh) * 2020-08-26 2020-11-03 游涛 双向可逆流体动力发动机

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