WO2018028806A1 - Pompe à roues dentées pour système de récuperation de chaleur perdue - Google Patents

Pompe à roues dentées pour système de récuperation de chaleur perdue Download PDF

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Publication number
WO2018028806A1
WO2018028806A1 PCT/EP2016/077957 EP2016077957W WO2018028806A1 WO 2018028806 A1 WO2018028806 A1 WO 2018028806A1 EP 2016077957 W EP2016077957 W EP 2016077957W WO 2018028806 A1 WO2018028806 A1 WO 2018028806A1
Authority
WO
WIPO (PCT)
Prior art keywords
gear
shaft
pump
gear pump
bearing
Prior art date
Application number
PCT/EP2016/077957
Other languages
German (de)
English (en)
Inventor
Guido Bredenfeld
Jakob Branczeisz
Matthias RIEDLE
Toni Jankowski
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 WO2018028806A1 publication Critical patent/WO2018028806A1/fr

Links

Classifications

    • 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
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/084—Toothed wheels
    • 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
    • F01C21/02—Arrangements of bearings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
    • F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
    • F01K25/02—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for the fluid remaining in the liquid phase
    • 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
    • F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
    • F04C15/0003—Sealing arrangements in rotary-piston machines or pumps
    • F04C15/0034—Sealing arrangements in rotary-piston machines or pumps for other than the working fluid, i.e. the sealing arrangements are not between working chambers of the machine
    • F04C15/0038—Shaft sealings specially adapted for rotary-piston machines or pumps
    • 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
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/086—Carter
    • 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
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
    • F04C2/18—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with similar tooth forms
    • 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
    • F04C2240/00—Components
    • F04C2240/50—Bearings
    • F04C2240/52—Bearings for assemblies with supports on both sides

Definitions

  • the invention relates to a gear pump, in particular designed as an external gear pump, in particular a feed fluid pump, which is used in a waste heat recovery system of an internal combustion engine.
  • Feed fluid pumps are known in many ways from the prior art, for example as an external gear pump from the subsequently published DE 10 2015 221 338.
  • an external gear pump is described with a pump housing, wherein in the pump housing, a first gear and a second gear are arranged meshing with each other.
  • the first gear on a first shaft and the second gear on a second shaft are arranged.
  • the first bearing surface and the second bearing surface are formed on a bearing goggles.
  • the gear pump according to the invention in particular embodied as a feed fluid pump of a waste heat recovery system, has the advantage that it can be used in aggressive and low-viscosity media and thereby reduces wear on the bearing of the gears. This leads to a longer life of the entire gear pump.
  • the gear pump on a housing in which a working space is formed, wherein in the working space, a first gear and a second gear are arranged meshing with each other.
  • a working fluid can be conveyed by the gear pump by means of the first gear and the second gear.
  • the first gear is rotatably mounted on a shaft, wherein the shaft is formed as a drive shaft.
  • the shaft of the first gear has a bearing outside of the working space and is sealed by the working medium.
  • the storage of the first wave can be protected against aggressive and low-viscosity media, since they do not come into contact with the storage.
  • the tribological contact points which are in contact with the medium are reduced within the gear pump, whereby the sliding movements that run in the mixed friction region can be minimized.
  • the inventive design of the gear pump is very suitable.
  • a shaft seal is arranged on the shaft of the end facing the first gear, wherein the shaft seal is formed as a radial shaft seal and surrounds the shaft of the first gear.
  • Gear pump has a cover, wherein in the first gear facing the end of the lid at least one sealing element is arranged.
  • the shaft seal cooperates with the lid, preferably with the at least one sealing element in the lid, and thus seals the bearing of the first gear against the working space and thus against the working medium.
  • Working medium can thus not get from the working space to the storage of the first gear, whereby a reduction in wear of the gear pump is achieved.
  • the bearing of the shaft of the first gear is formed in the cover.
  • the bearing of the shaft of the first gear has a separate lubrication, for example, a grease filling on. This is made possible by the separate storage outside the working space.
  • a separate lubrication for example, a grease filling on. This is made possible by the separate storage outside the working space.
  • lubrication and cooling can be used. This achieves an improvement in the hydrodynamics within the bearing. External lubrication of the bearing also reduces friction and improves temperature management within the bearing.
  • the bearing of the shaft of the first gear is formed as a single or multi-row roller bearing.
  • the diameter of the first gear at least approximately the same size as the diameter of the second gear.
  • the second gear on a fixed parallel to the shaft axis, example, by a rolling or sliding bearing, rotatably mounted.
  • the second gear is guided radially in the housing.
  • the second gear cooperates with a housing inner wall formed on the housing and thereby forms a radial bearing.
  • the second gear can be stored without a fixed axis, whereby the number of bearings can be reduced to a minimum. This leads to a simpler manufacturing and assembly, whereby a higher cost savings is achieved.
  • axial stop plates are formed in the housing, whereby the first gear and the second gear are axially mounted on the housing in the working space.
  • the gear pump is designed as external gear pump. These are very cost-effective in their production and have a robust operating behavior.
  • Gear pumps especially external gear pumps, are very suitable for use in waste heat recovery systems of internal combustion engines. Therefore, the gear pump according to the invention is very advantageously usable in a waste heat recovery system.
  • the waste heat recovery system comprises a circuit carrying the working medium, wherein the circuit in the flow direction of the working medium comprises a feed fluid pump, an evaporator, an expansion machine and a condenser.
  • the feed fluid pump is designed as a gear pump with the features described above.
  • the gear pump has a robust design, a cost-effective production and also a high wear protection.
  • 3 shows a radial shaft sealing ring in a sectional view
  • 4 shows a detail of the mounting of the first gear wheel of a further embodiment of the gear pump according to the invention with axial thrust plates
  • Fig. 5 shows schematically a waste heat recovery system. Description of the embodiments
  • Fig.1 a well-known from the prior art gear pump 1, designed as external gear pump, shown in an exploded view.
  • the gear pump 1 comprises a pump housing 3, a cover 2 and a bottom flange 26.
  • the cover 2 and the bottom flange 26 are clamped together with the interposition of the pump housing 3 by four screws 27.
  • the pump housing 3, the cover 2 and the bottom flange 26 define a working space 17.
  • a first gear 4 and a second gear 5 are arranged in mesh with each other.
  • the first gear 4 is mounted on a shaft 7 and the second gear 5 on an axis parallel to the shaft 7 19.
  • the shaft 7 serves as a drive shaft and is connected to a drive, not shown, for example, a crankshaft of an internal combustion engine.
  • the shaft 7 protrudes through the bottom flange 26.
  • the shaft 7 and the axis 19 each protrude through their associated gear 4, 5 and are firmly connected thereto. On both sides of the gears 4, 5, the shaft 7 and the axle 19 are mounted.
  • the bearing of the shaft 7 and the axis 19 is effected by two bearing glasses 30, 40 wherein the bearing glasses 30, 40 are arranged in the working space 17: a bearing glasses 30 is disposed adjacent to the bottom flange 26 and another bearing glasses 40 adjacent to the cover 2.
  • the bearing glasses 30 supports the shaft 7 and the axis 19 on the drive side and the other bearing glasses 40 on the opposite side of the gears 4, 5th
  • the two bearing glasses 30, 40 each have a radial bearing function and a thrust bearing function, wherein the thrust bearing function of the two bearing glasses 30, 40th is directed opposite to each other.
  • the bearing glasses 30 on the front side a stop surface 31 and the other bearing glasses 40 frontally another stop surface 42. Both stop surfaces 31, 42 cooperate with the gear end faces of the two gears 4, 5 together.
  • the stop surface 31 supports both gears 4, 5 oriented in the axial direction to the bottom flange 26; the further stop surface 42 supports both gears 4, 5 oriented in the axial direction to the cover 2.
  • FIG. 2 shows a section of an embodiment of a gear pump 1 according to the invention in the region of the gears 4, 5. Parts of the same function are provided with the same reference numerals as in Fig.l.
  • the gear pump 1 is designed as an external gear pump.
  • the gears 4, 5 therefore promote a working medium along a housing inner wall 25 of the housing 3.
  • the first gear 4 and the second gear 5 are arranged in the working space 17 within the housing 3 meshing. Accordingly, the first teeth 22 of the first gear 4 are at their respective first tooth flanks 20 in meshing engagement with the second teeth 23 of the second gear 5 at the respective second tooth flanks 21st
  • a shaft seal 6 For the sealing of the working space 17 to the environment extends approximately annularly around the circumference of the shaft 7, a shaft seal 6, said shaft seal 6 with the lid 2, in this embodiment, with a sealing element 24 in the lid 2, cooperates.
  • the sealing element 24 is arranged in corresponding grooves in the cover 2.
  • an external lubricant supply such as a grease filling of the rolling bearing 8 is possible.
  • a housing seal 240 is arranged in the cover 2.
  • This housing seal 240 may also be in one piece be formed with the shaft seal 24 in the lid 2.
  • the sealing element 24 is not essential to the tightness between the shaft seal 6 and the cover 2 and therefore can be omitted.
  • the rotatable radial mounting of the second gear 5 takes place on a fixed axis 19, for example by a rolling or sliding bearing.
  • the shaft seal 6 is formed as a radial shaft seal 10, which a sealing housing 11, preferably made of metal, a dust lip 12 and a sealing lip 13, preferably of a polymer such as PTFE (polytetrafluoroethylene), FKM (fluoro rubber), NBR (nitrile rubber) or higher polymers , includes.
  • PTFE polytetrafluoroethylene
  • FKM fluoro rubber
  • NBR nonitrile rubber
  • axial stop plates 9 are formed, through which the first gear 4 and the second gear 5 via the housing 3 and the cover. 2 are stored axially in the working space 17.
  • the axial stop plates 9 made of graphite or a thermoplastic material, such as PEEK (polyetheretherketone), produced.
  • the mounting of the shaft 7 serving as the drive shaft is mounted externally in the cover 2 in FIG.
  • the shaft seal 6 extends, as in Fig.2, approximately annularly around the circumference of the shaft 7, a shaft seal 6 and cooperates with the cover 2.
  • the rolling bearing 8 of the shaft 7 is separated from the working medium.
  • securing elements 28 are arranged for the axial bearing of the rolling bearing 8. It is also possible to use these securing elements 28 in the embodiment of the gear pump 1 in FIG.
  • the second gear 5 is executed without own shaft bearing. To form a radial bearing, the second gear 5 cooperates with the housing inner wall 25. It accounts for more, related to conventional constructions bearings.
  • the number of bearings can be reduced to a minimum, since the bearings or the composite of drive, bearings, shaft, axle and housing seat no longer need to be aligned so exactly.
  • the engine position can be realized solely by the part of the gear pump 1 in which the main shaft bearing, in this case the shaft 7 in the cover 2, is accommodated.
  • FIG. 5 shows a waste heat recovery system 100 of an internal combustion engine 110.
  • the internal combustion engine 110 is supplied with oxygen via an air supply 112; the exhaust gas emitted after the combustion process is passed through a
  • Exhaust pipe 111 discharged from the engine 110.
  • the waste heat recovery system 100 has a working medium leading circuit 100 a, which comprises in the flow direction of the working medium a feed fluid pump 102, an evaporator 103, an expansion machine 104 and a condenser 105.
  • the working medium can be fed as needed via a branch line from a sump 101 and a valve unit 101a in the circuit 100a.
  • the collecting container 101 may alternatively be incorporated into the circuit 100a.
  • the evaporator 103 is connected to the exhaust pipe 111 of the internal combustion engine 110, so uses the heat energy of the exhaust gas of the engine 110.
  • Liquid working fluid is conveyed through the feed fluid pump 102, optionally from the reservoir 101, in the evaporator 103 and there by the heat energy of the exhaust gas Internal combustion engine 110 evaporates.
  • the vaporized working medium is subsequently expanded in the expansion machine 104 with release of mechanical energy, for example to a generator, not shown, or to a transmission, not shown. Subsequently, will the working medium in the condenser 105 is liquefied again and returned to the collecting container 101 or fed to the feed fluid pump 102.
  • the embodiment of the gear pump 1 described above is very well suited for use as a feed fluid pump

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Gear Transmission (AREA)

Abstract

Pompe à roues dentées (1) réalisée notamment en tant que pompe à fluide d'alimentation (102) d'un système de récupération de chaleur perdue (100), présentant un boîtier (3) dans lequel est formée une chambre de travail (17), la chambre de travail (17) renfermant une première roue dentée (4) et une seconde roue dentée (5) qui s'engrènent. La première roue dentée (4) et la seconde roue dentée (5) peuvent servir à faire circuler un fluide de travail à travers la pompe à roues dentées (1), la première roue dentée (4) étant montée rotative sur un arbre (7) et l'arbre (7) étant réalisé sous la forme d'un arbre d'entraînement. L'arbre (7) de la première roue dentée (4) présente en outre un logement à l'extérieur de la chambre de travail (17) et est rendu étanche vis-à-vis du fluide de travail.
PCT/EP2016/077957 2016-08-09 2016-11-17 Pompe à roues dentées pour système de récuperation de chaleur perdue WO2018028806A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016214762.5A DE102016214762A1 (de) 2016-08-09 2016-08-09 Außenzahnradmaschine
DE102016214762.5 2016-08-09

Publications (1)

Publication Number Publication Date
WO2018028806A1 true WO2018028806A1 (fr) 2018-02-15

Family

ID=57391955

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/EP2016/077957 WO2018028806A1 (fr) 2016-08-09 2016-11-17 Pompe à roues dentées pour système de récuperation de chaleur perdue
PCT/EP2017/067543 WO2018028916A1 (fr) 2016-08-09 2017-07-12 Machine à roues dentées extérieures

Family Applications After (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/067543 WO2018028916A1 (fr) 2016-08-09 2017-07-12 Machine à roues dentées extérieures

Country Status (2)

Country Link
DE (1) DE102016214762A1 (fr)
WO (2) WO2018028806A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023041642A1 (fr) * 2021-09-20 2023-03-23 Oerlikon Textile Gmbh & Co. Kg Pompe de dosage pour transporter des fluides abrasifs

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110135516A1 (en) * 2009-12-03 2011-06-09 Denso Corporation Electric pump
EP2565376A2 (fr) * 2011-08-31 2013-03-06 Jtekt Corporation Unité de pompe électrique
DE102012212668A1 (de) * 2012-06-29 2014-01-02 Robert Bosch Gmbh Zahnradpumpe
DE102013201384A1 (de) * 2013-01-29 2014-07-31 Robert Bosch Gmbh Innenzahnradpumpe
DE102013204071A1 (de) * 2013-03-11 2014-09-11 Robert Bosch Gmbh Innenzahnradpumpe
WO2016052570A1 (fr) * 2014-09-30 2016-04-07 ダイキン工業株式会社 Pompe ou moteur à engrenages
DE102016100298A1 (de) * 2015-01-14 2016-07-14 Ford Global Technologies, Llc Wärmetauscher für Rankine-Zyklus in einem Fahrzeug

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3120190A (en) * 1961-03-02 1964-02-04 Falk Corp Gear pump
US7591640B2 (en) * 2006-08-30 2009-09-22 Ishikawajima-Harima Heavy Industries Co., Ltd. Three gear type gear pump of a fuel supply system
KR101503088B1 (ko) * 2007-03-20 2015-03-16 엘리콘 텍스타일 게엠베하 운트 코. 카게 기어 휠 펌프
US8087913B2 (en) * 2008-12-22 2012-01-03 Hamilton Sundstrand Corporation Gear pump with unequal gear teeth on drive and driven gear
DE102012005958A1 (de) 2012-03-23 2013-09-26 Robert Bosch Gmbh Hydraulische Außenzahnradmaschine
DE102012216254A1 (de) 2012-09-13 2014-03-13 Robert Bosch Gmbh Außenzahnradmaschine
DE102014212255A1 (de) 2014-06-26 2015-12-31 Robert Bosch Gmbh Außenzahnradmaschine mit Lagerkörpern, die geradlinig gleitbeweglich aneinander abgestützt sind

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110135516A1 (en) * 2009-12-03 2011-06-09 Denso Corporation Electric pump
EP2565376A2 (fr) * 2011-08-31 2013-03-06 Jtekt Corporation Unité de pompe électrique
DE102012212668A1 (de) * 2012-06-29 2014-01-02 Robert Bosch Gmbh Zahnradpumpe
DE102013201384A1 (de) * 2013-01-29 2014-07-31 Robert Bosch Gmbh Innenzahnradpumpe
DE102013204071A1 (de) * 2013-03-11 2014-09-11 Robert Bosch Gmbh Innenzahnradpumpe
WO2016052570A1 (fr) * 2014-09-30 2016-04-07 ダイキン工業株式会社 Pompe ou moteur à engrenages
DE102016100298A1 (de) * 2015-01-14 2016-07-14 Ford Global Technologies, Llc Wärmetauscher für Rankine-Zyklus in einem Fahrzeug

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023041642A1 (fr) * 2021-09-20 2023-03-23 Oerlikon Textile Gmbh & Co. Kg Pompe de dosage pour transporter des fluides abrasifs

Also Published As

Publication number Publication date
DE102016214762A1 (de) 2018-02-15
WO2018028916A1 (fr) 2018-02-15

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