WO2018028916A1 - Machine à roues dentées extérieures - Google Patents

Machine à roues dentées extérieures Download PDF

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Publication number
WO2018028916A1
WO2018028916A1 PCT/EP2017/067543 EP2017067543W WO2018028916A1 WO 2018028916 A1 WO2018028916 A1 WO 2018028916A1 EP 2017067543 W EP2017067543 W EP 2017067543W WO 2018028916 A1 WO2018028916 A1 WO 2018028916A1
Authority
WO
WIPO (PCT)
Prior art keywords
external gear
gear machine
gear
driven
external
Prior art date
Application number
PCT/EP2017/067543
Other languages
German (de)
English (en)
Inventor
Guido Bredenfeld
Jakob Branczeisz
Matthias RIEDLE
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 WO2018028916A1 publication Critical patent/WO2018028916A1/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

  • External gear machine The invention relates to an external gear machine, in particular a
  • External gear pump or an external gear motor with an engine comprising at least two gears which mesh with each other in outer engagement and are rotatably mounted about two axes of rotation, wherein in operation of the
  • External gear machine act on the gears bearing forces, which result from a drive torque with which one of the gears is driven, and an inner pressure field, which is exerted by a working fluid in the operation of the external gear machine with an operating pressure
  • the invention further relates to a method for designing such an external gear machine.
  • External gear machine in particular an external gear pump or an external gear motor, known with a housing in which at least a first
  • Gear is received, which meshes with an associated second gear in the outer engagement, wherein the at least one first gear is rotatably supported in at least one first bearing body with respect to a first axis of rotation, wherein the second gear is rotatably mounted in at least one second bearing body with respect to a second axis of rotation the first and the second
  • the bearing bushes comprises a material having a greater coefficient of expansion than a housing, wherein the bushings wholly or partially have between their radially outer surface and its bearing bore extending, slot-like recesses.
  • DE 10 2012 005 958 A1 discloses a hydraulic external gear machine in which axially adjacent areas of the inner walls of bearing bushes are designed to be elastically deformable in the region of a low-pressure connection to gears.
  • the object of the invention is the life of an external gear machine, in particular an external gear pump or an external gear motor, with an engine comprising at least two gears which mesh with each other in outer engagement and are rotatably mounted about two axes of rotation, wherein in operation of the external gear on the gears bearing forces act, which results from a driving torque with which one of the gears is driven, and from an inner pressure field, which is exerted by a working fluid, in the operation of the external gear machine with a
  • low viscosity medium such as an ORC fluid.
  • the object is with an external gear machine, in particular one
  • External gear pump or an external gear motor with an engine comprising at least two gears which mesh with each other in outer engagement and are rotatably mounted about two axes of rotation, wherein in operation of the
  • External gear machine act on the gears bearing forces, which result from a drive torque with which one of the gears is driven, and an inner pressure field, which is exerted by a working fluid in the operation of the external gear machine with an operating pressure
  • ORC Organic Rankine Cycle
  • refrigerant such as that used in air conditioning systems has proven advantageous.
  • the refrigerant has sufficiently good thermodynamic properties and is also non-flammable.
  • External gear machine have a uniform, in particular symmetrical, load distribution. Due to the even load of waves and
  • a further preferred embodiment of the external gear machine is characterized in that the bearing at the external bearing point has a separate lubrication. Due to the separate lubrication, the external bearing can be operated optimally tribologically. The separately lubricated external bearing can advantageously absorb the largest radial loads. As a result, the bearing loads within the external gear machine can be reduced to a minimum.
  • Another preferred embodiment of the external gear machine is characterized in that a driven by the driven or driving gear gear has a smaller effective gear diameter than the driven or driving gear. As a result, the load on the driven gear can advantageously be reduced until the loads on the two gear wheels are approximately the same.
  • Another preferred embodiment of the external gear machine is characterized in that the driven gear has fewer teeth than the driven or driving gear. By this measure, the gear diameter of the driven gear can be reduced in a simple manner.
  • the driven gear is another Has toothing module as the driven or driving gear.
  • care must be taken only to maintain the ability of the gears to mesh against each other.
  • it is important to have a sufficient seal over the tooth flanks during operation of the
  • a further preferred embodiment of the external gear machine is characterized in that the driven gear is mounted on a fixed axis. This provides, for example, the advantage that only one bearing point is required within the working medium of the external gear machine. The bearing within the working medium can then be carried out as large as possible in order to advantageously further reduce the bearing load.
  • a further preferred embodiment of the external gear machine is characterized in that the driven gear is mounted by tooth heads directly in a housing of the external gear machine.
  • the driven gear is mounted by tooth heads directly in a housing of the external gear machine.
  • the invention further relates to a method for laying out a previously described external gear machine.
  • the engine is deliberately designed asymmetrically in the context of the construction in view of the bearing forces acting on the gears in order to load the gears as evenly as possible during operation of the external gear machine.
  • the measures described above can also be used in different combinations individually or together.
  • the external gear machine described above is preferably used in a system for heat recovery from exhaust gas in the operation of commercial vehicles.
  • the waste heat recovery system is also referred to as a waste heat recovery system.
  • As working fluid is shortened in the Also called WHR system heat recovery system for
  • Example uses an ORC fluid.
  • the ORC fluid is brought from low to higher pressure by a previously described external gear machine and conveyed to evaporators. Take the vaporizers
  • Expansion machine work and is then re-liquefied in a condenser, with the residual heat is released to the environment. Finally, the liquid is again supplied to the external gear machine.
  • the energy obtained from the process may be mechanically delivered to a crankshaft or drive a generator.
  • Figure 2 shows the external gear machine of Figure 1 in cross section
  • Figure 3 shows a similar external gear machine as in Figures 1 and 2 with a force-balanced engine perspective and partially cut.
  • FIG. 1 and 2 is a schematic representation of an external gear 1 with a first gear 3 and a second gear 4 simplified in longitudinal section and in cross section.
  • the externally toothed gears 3, 4 mesh with each other in external engagement.
  • the first gear 3 is rotatably connected in Figure 1 on its left side with a pin 5.
  • the first gear 3 can be driven via the pin 5, which is then also referred to as a drive pin 5.
  • the first gear 3 is rotatably with a
  • the second gear 4 has in Figure 1 laterally two bearing pins 7, 8, with which the second gear 4 is rotatably connected.
  • the two gears 3, 4 are rotatably mounted in a housing 10 by means of the pins 5, 6 and 7, 8.
  • the first gear 5 is rotatable about a first axis of rotation 13 by means of the drive pin 5 and the journal 6.
  • the second gear 4 is rotatable by means of the bearing pins 7, 8 about a second axis of rotation 14, which is parallel to the first axis of rotation 13.
  • the housing 10 is bounded on its left side in FIG. 1 by a first housing cover 11 and on its right side in FIG. 1 by a second housing cover 12.
  • a housing base 15 of the housing 10 is arranged between the housing covers 11, 12.
  • the first housing cover 11 is connected by means of fastening means 16, 17 fixed to the housing base body 15.
  • the second housing cover 12 is connected by means of fastening means 18, 19 fixed to the housing base body 15.
  • the fastening means 16 to 19 are, for example, bolts, which can be combined with dowel pins.
  • Housing body 15 a first housing seal 21 is arranged.
  • a second housing seal 22 is disposed between the second housing cover 12 and the housing base body 15.
  • a radial shaft seal 24 is used to seal a
  • a bearing arrangement 25 serves to mount the two gearwheels 3, 4 in the housing 10.
  • the bearing arrangement 25 comprises two radial bearings 26, 27 for mounting the first gearwheel 3.
  • the bearing arrangement 25 comprises two further radial bearings 28 , 29.
  • the radial bearings 26 and 27 are associated with two Axialfelddichtonne 31, 32, which serve to seal between the radial bearings 26, 27 and the housing covers 11, 12.
  • the radial bearings 28, 29 are associated with two Axialfelddichtonne 33, 34, which serve to seal between the radial bearings 28, 29 and the housing covers 11, 12.
  • the drive pin 5 and the bearing assembly 25 with the radial bearings 26 to 29 represent an engine 40 of the external gear machine 1
  • External gear machine 1 is operated with a so-called critical medium, which has a very low viscosity, low lubricity and possibly a chemical aggressiveness, then the critical medium
  • the external gear machine 1 of Figure 1 is shown in cross section.
  • the outer gear machine 1 is supplied in operation on a suction side 35, a low-viscosity medium, such as an ORC fluid, in particular a refrigerant.
  • the supplied low-viscosity medium is indicated in Figure 2 by an arrow 37.
  • the external gear machine 1 If the external gear machine 1 is operated as an external gear pump, then the supplied low-viscosity medium is pressurized by the meshing with each other in external engagement gears 3, 4. On a pressure side 36, the pressurized low-viscosity medium then exits, as indicated by an arrow 38.
  • External gear pump driven external gear machine 1 via the Drive pin (5 in Figure 1) is driven.
  • the driven with the drive torque 41 gear 3, which is also referred to as a driving gear 3, drives the thus meshing gear 4 in a rotational direction, which is indicated by an arrow 42.
  • the driven or driving gear 3 rotates in Figure 2 counterclockwise.
  • the meshing driven gear 4 rotates clockwise.
  • radial sealing zones between the gears 3, 4 and the housing 10 are indicated.
  • the radial sealing zones 43, 44 are also referred to as inlet zones.
  • the resulting force 56 on the driven gear 4 results from the inner pressure field 52 and the driving force and the
  • Figure 3 is an example of an external gear 61 with an engine 60, as indicated by a targeted geometric adjustment of the engine 60, a uniform, symmetrical load distribution within the
  • the external gear machine 61 includes as a driven or driving Gear a first gear 63.
  • a second gear 64 is driven by the first gear 63.
  • To initiate a drive torque in the first gear 63 is a drive pin 65th
  • the drive pin 65 has at a side facing away from the first gear 63 pin end 66 has a groove 67 which serves to receive a feather key. About the groove 67 with the (not shown) key is in operation of the
  • External gear 61 as an external gear pump, a drive torque applied to the first gear 63.
  • the two gears 63, 64 are in a housing 70 of the
  • External gear 61 rotatably arranged. Via a connecting bore 71 of the external gear 61, a working medium can be supplied.
  • the first gear 63 is rotatably disposed in a recess 73 of the housing 70.
  • the storage of the first gear 63 via the drive pin 65 advantageously external, ie outside the housing 70.
  • the external storage is advantageous lubricated separately.
  • the driven gear 64 has a significantly smaller effective
  • Recess 74 of the housing 70 of the external gear 61 can be stored.

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

L'invention concerne une machine à roues dentées extérieures (61), en particulier une pompe à roues dentées extérieures ou un moteur à roues dentées extérieures, comprenant un propulseur (60) muni d'au moins deux roues dentées (63, 64) qui s'engrènent extérieurement l'une dans l'autre and qui sont montées de manière rotative autour de deux axes de rotation. Pendant le fonctionnement de la machine à roues dentées extérieures (61), des forces de palier agissent sur les roues dentées (64, 64), lesquelles forces résultent d'un couple d'entraînement avec lequel l'une des roues dentées (63, 64) est entraînée et d'un champ de pression intérieur qui est exercé par un fluide de travail soumis à une pression de fonctionnement pendant le fonctionnement de la machine à roues dentées extérieures (61). Pour prolonger la durée de vie de la machine à roues dentées extérieures, en particulier en cas de fonctionnement avec un milieu à faible viscosité tel qu'un fluide ORC, le propulseur (60) de la machine à roues dentées extérieures (61) est conçu spécifiquement pour être asymétrique, en termes de forces de palier agissant sur les roues dentées (63, 64), pour contraindre le plus uniformément possible les roues dentées (63, 64) pendant le fonctionnement de la machine à roues dentées extérieures (61).
PCT/EP2017/067543 2016-08-09 2017-07-12 Machine à roues dentées extérieures WO2018028916A1 (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
WO2018028916A1 true WO2018028916A1 (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 Before (1)

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

Country Status (2)

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

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021004717A1 (de) * 2021-09-20 2023-03-23 Oerlikon Textile Gmbh & Co. Kg Dosierpumpe zum Fördern von abrasiven Fluiden

Citations (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
US20080056926A1 (en) * 2006-08-30 2008-03-06 Masuda Seiei Gear pump
WO2008113712A1 (fr) * 2007-03-20 2008-09-25 Oerlikon Textile Gmbh & Co. Kg Pompe à engrenages
EP2199612A2 (fr) * 2008-12-22 2010-06-23 Hamilton Sundstrand Corporation Pompe à engrenage avec une denture inégale de commande et engrenage mené
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

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Publication number Priority date Publication date Assignee Title
JP4918936B2 (ja) * 2009-12-03 2012-04-18 株式会社デンソー 電動ポンプ
JP6056149B2 (ja) * 2011-08-31 2017-01-11 株式会社ジェイテクト 電動ポンプユニットおよびその製造方法
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
JP6075346B2 (ja) * 2014-09-30 2017-02-08 ダイキン工業株式会社 歯車ポンプ又は歯車モータ
US9890666B2 (en) * 2015-01-14 2018-02-13 Ford Global Technologies, Llc Heat exchanger for a rankine cycle in a vehicle

Patent Citations (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
US20080056926A1 (en) * 2006-08-30 2008-03-06 Masuda Seiei Gear pump
WO2008113712A1 (fr) * 2007-03-20 2008-09-25 Oerlikon Textile Gmbh & Co. Kg Pompe à engrenages
EP2199612A2 (fr) * 2008-12-22 2010-06-23 Hamilton Sundstrand Corporation Pompe à engrenage avec une denture inégale de commande et engrenage mené
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

Non-Patent Citations (1)

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Title
STEFANO MARINI ET AL: "Ottimizzazione per unità idrostatiche", 9 October 2014 (2014-10-09), pages 26 - 28, XP055409083, Retrieved from the Internet <URL:https://pixelbook.tecnichenuove.com/newsstand/organiditrasmissione/viewer/guest/com.tecnichenuove> [retrieved on 20170922] *

Also Published As

Publication number Publication date
DE102016214762A1 (de) 2018-02-15
WO2018028806A1 (fr) 2018-02-15

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