EP2216550A2 - Pompe à engrenages à joint d'étanchéité d'arbre - Google Patents

Pompe à engrenages à joint d'étanchéité d'arbre Download PDF

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Publication number
EP2216550A2
EP2216550A2 EP10001269A EP10001269A EP2216550A2 EP 2216550 A2 EP2216550 A2 EP 2216550A2 EP 10001269 A EP10001269 A EP 10001269A EP 10001269 A EP10001269 A EP 10001269A EP 2216550 A2 EP2216550 A2 EP 2216550A2
Authority
EP
European Patent Office
Prior art keywords
pump
gear
housing cover
drive
shaft
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
Application number
EP10001269A
Other languages
German (de)
English (en)
Other versions
EP2216550A3 (fr
EP2216550B1 (fr
Inventor
Michael Rothen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Illinois Tool Works Inc
Original Assignee
Inatec 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 Inatec GmbH filed Critical Inatec GmbH
Priority to PL10001269T priority Critical patent/PL2216550T3/pl
Publication of EP2216550A2 publication Critical patent/EP2216550A2/fr
Publication of EP2216550A3 publication Critical patent/EP2216550A3/fr
Application granted granted Critical
Publication of EP2216550B1 publication Critical patent/EP2216550B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F04C2/12—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
    • 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
    • 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
    • F01C21/10—Outer members for co-operation with rotary pistons; Casings
    • F01C21/104—Stators; Members defining the outer boundaries of the working chamber
    • F01C21/108—Stators; Members defining the outer boundaries of the working chamber with an axial surface, e.g. side plates

Definitions

  • a gear pump with the features of the preamble of claim 1.
  • a gear pump is provided with at least two externally meshing gears, which bear with their flat sides directly or indirectly on housing covers of the gear pump.
  • At least one drive gear is provided with shaft journal and rotatably connected thereto, wherein the shaft journals are arranged on both sides of the at least one drive gear and rotatably mounted in the respective adjacent housing cover.
  • One of the shaft journals of the drive gear is extended and guided as a drive pivot through the adjacent housing cover to the outside.
  • a shaft seal is provided for the drive pivot. This acts sealingly between the drive pivot and the housing cover penetrated by it and is on the pump gear wheels facing the inside of the penetrated by the drive pivot pin first Housing cover arranged in a gear-side recess of the housing cover.
  • Gear pumps of the type described above are known in their basic principle for decades and are used, inter alia, for driving hydraulic systems in vehicle technology, where high efficiency with simple and cost-effective production and the generation of high pressures in the foreground.
  • the construction and the principle of operation of a gear pump is particularly clear in the DE 24 11 492 C2 described.
  • the pump is constructed of three plate-shaped housing parts, which is why such pumps are also referred to as "plate pumps". Of the sandwiched plates, the middle takes up the pump chamber with the two pump gears in this case (pump plate). On both sides of the pump plate are at her sealing housing cover, which close the pump chamber in the axial direction (first and second cover plate).
  • Such pumps can also be used for problematic pumping liquids, such as adhesives.
  • adhesives such as adhesives.
  • PUR adhesives reactive adhesives
  • a gear or plate pump is also used in the DE 81 01 898 U1 described.
  • the pressure effect can be taken from an acting in the axial direction Federkraftbeetzschung the piston or from the hydrostatic pressure of the fluid to be delivered.
  • To seal the high pressure side of the piston against the low pressure side sealing rings are provided, which are arranged in a pressure-loaded annular space.
  • a disadvantage of such an arrangement is in addition to a high cleaning effort that the front side of the promotional gears are exposed by the action of the pistons heavy wear.
  • a contrast easier to clean (metering) gear pump can the US Pat. No. 6,857,860 B1 be removed.
  • the seal of the delivery volume relative to the pump housing and with respect to the drive shaft is effected by a sealing ring arranged in a recess of a housing plate, which is pressed against the driving gear, which is non-rotatably connected to the shaft. The pressing is done by spring force.
  • the recess receiving the sealing ring is subjected to a pressurized sealing liquid.
  • the front side of the driving Gear exposed by the acted upon by mechanical or hydrostatic pressure sealing ring strong mechanical loads, which are a wear reduction of the pump, but in particular of the gear, detrimental.
  • a structurally complex gear pump with preferably three gears can the DE 69 24 726 U be removed.
  • the conveying gears are driven by a third gear, which is in engagement with the driving gear, wherein the drive takes place on the low pressure side of the delivery volume.
  • the arrangement of the drive shaft on the low pressure side of the pump leads to lower demands on the sealing effect of the seal.
  • a recess is provided, in which a plate can be used for fixing the gears.
  • a suitable for promoting not self-lubricating media gear pump can the DE 19 27 514 U1 be removed.
  • the gears do not touch within the pumped volume of the pump, therefore, the gears are driven individually and synchronously.
  • the synchronous drive is carried out in a the volume to be delivered upstream gear housing, which is closed to the oil volume to be delivered.
  • the seals are arranged so that they are accessible from the volume to be delivered.
  • the bearing of the drive shaft is effected by two ball bearings, which are arranged spaced apart in the axial direction in a housing chamber. The chamber is sealed from the volume to be delivered by a packing.
  • the invention is based on the problem in a generic pump to extend the life of the shaft seal for the drive pivot, so that a low maintenance is achieved even for problematic fluids to be pumped.
  • the recess is provided with an arranged on the side facing the pump chamber prechamber, wherein the prechamber supplies the shaft seal with constantly exchanging fluid to be pumped.
  • a further improvement, which also affects the durability of the shaft seal can be achieved by using a bearing bush instead of the fitting gap between the rotary drive pin and the housing cover in question , which absorbs the radial bearing forces and ensures good low-friction bearing and the inner shaft seal better protects against radial loads.
  • the bearing bush can be different means for pivot bearing, such as plain bearings or pivot bearings act.
  • gear pump is designed as a plate pump, in which both sides of a pump plate 12 first and second plate-shaped housing cover 14A, 14B are sealingly applied to the pump plate 12.
  • Two externally meshing pump gears 16A, 16B are arranged in known and intersecting cylindrical openings of the pump plate 12.
  • the drive-side pump gear 16 A is rotatably connected to a drive shaft 18. This has (in the drawing on the left) on the drive side a housing cover 14A outwardly projecting drive pivot pin 18A.
  • the drive shaft On the drive opposite side of the pump gear 16A, the drive shaft has a shaft journal 18B rotatably supported in a mating bore 32A of the second (rear) housing cover 14B with a small radial gap.
  • This bore can be designed as a blind bore or otherwise be sealed against the end face of the pump space.
  • the second pump gear 16B meshing with the first pump gear 16A may be radially and axially supported in any desired manner.
  • the entry of the pumping fluid takes place for example via a lateral inlet opening 20 of the pump plate 2 approximately in the contact region of the two pump gears.
  • the outlet opening is generally diametrically opposite to the inlet opening 20.
  • the drive-side rotary mounting of the drive shaft 18 takes place in the embodiment according to FIG. 1 via a bearing bush 22, which is recessed into the first (front) housing cover 14A on the side opposite the pump plate 12. in this connection it may, for example, be a self-lubricating plain bearing or a roller bearing.
  • a housing cover recess 24 in which a ring seal as a shaft seal 26 for radial sealing of the drive shaft 18 relative to the pump chamber and the first (front) housing cover 14A is used.
  • a towards the pump chamber towards, preferably conically, expanding antechamber 24A of the recess 24 provides the shaft seal 26 with constantly exchanging fluid to be pumped.
  • a radial fitting gap is provided between the drive shaft 18 and the first (front) housing cover 14A.
  • the drive pivot pin 18A is surrounded by a countershaft 28 with a chamber 28A which is open toward the drive pivot pin 18A and can be acted upon by lubricant via radial bores 28B, 28C.
  • a shaft seal 30 seals the chamber 28 A from the outer part of the drive shaft 18 fluidly.
  • the second housing cover 14B rests on its outside tightly against a pump plate, wherein the supply and the discharge for fluid to be pumped (not shown) through the second housing cover 14B through.
  • the second pump gear 16B is seated with the necessary radial play rotatably on a second shaft 19 which is mounted in the first housing cover 14A in a blind bore and rotatably seated in the second housing cover 14B.
  • the shaft journal 18B is rotatable with respect to the second housing cover 14B, wherein the pump chamber 21 located in the pump plate 12 may be sealed by a pump chamber seal 21A against the second housing cover 14B and the shaft journal 18B if necessary.
  • the gear wheel side arranged in the first housing cover 14A shaft seal 26 in axial Direction via a support ring 26A supported on the second housing cover 14B.
  • FIG. 1 The embodiment shown can be modified in a similar manner as the embodiment of the FIG. 2B in relation to those in FIG. 2A , wherein the bearing bush 22 may also be significantly larger in circumference than in FIG. 1 so that common needle roller bearings can be used as a bearing bushing 22, wherein a housing part receiving the needle roller bearing and the needle roller bearing may be partially extended within the first housing cover 14A and partly outside thereof.
  • Bearing bushes 22 used in accordance with the invention can, in particular in one embodiment, also be provided as pump bearings on the pump side or on both sides with additional shaft seals.
  • the possible outlines of a bearing bush 22 in the form of a encapsulated by a housing needle roller bearings are in FIG. 1 drawn in dashed form as an alternative.
  • the pump gears are arranged on a second shaft 19 and a third shaft 19 '.
  • the shafts 19, 19 ' are arranged in cylindrical openings of the pump plates 12 and 12'. Due to the multi-stage design, the delivery volume of the pump according to Fig. 3 relative to the volume of a pump according to the FIGS. 1 . 2A or 2 B be multiplied. For example, according to Fig. 3 about a fourfold or eightfold increase in the delivery volume possible.
  • a recess 24 is provided, in which a shaft seal 26 is arranged.
  • the recess 24 is provided with an on the pump chamber facing side arranged prechamber 24A.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
EP10001269.9A 2009-02-06 2010-02-08 Pompe à engrenages à joint d'étanchéité d'arbre Active EP2216550B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10001269T PL2216550T3 (pl) 2009-02-06 2010-02-08 Pompa zębata z uszczelką wału

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE202009001525U DE202009001525U1 (de) 2009-02-06 2009-02-06 Zahnradpumpe

Publications (3)

Publication Number Publication Date
EP2216550A2 true EP2216550A2 (fr) 2010-08-11
EP2216550A3 EP2216550A3 (fr) 2016-07-27
EP2216550B1 EP2216550B1 (fr) 2018-07-25

Family

ID=41838544

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10001269.9A Active EP2216550B1 (fr) 2009-02-06 2010-02-08 Pompe à engrenages à joint d'étanchéité d'arbre

Country Status (4)

Country Link
EP (1) EP2216550B1 (fr)
DE (1) DE202009001525U1 (fr)
ES (1) ES2688647T3 (fr)
PL (1) PL2216550T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202015006862U1 (de) 2015-10-02 2015-10-23 Beinlich Pumpen Gmbh Pumpe für hydraulische Medien
DE202023000769U1 (de) 2023-04-06 2023-08-09 SKTEC GmbH Zahnradpumpe mit Dichtsystem

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1822807U (de) 1959-01-15 1960-12-01 Kirk & Kompagni Zahnradpumpe fuer homogenisatoren.
DE1927514U (de) 1965-08-25 1965-11-18 Bayerische Motoren Werke Ag Heiz- und belueftungsvorrichtung zum einbau vor oder unter das armaturenbrett von kraftfahrzeugen.
DE6924726U (de) 1969-06-19 1969-10-16 V D O Tachometer Werke Adolf S Zahnradpumpe oder -motor
DE8101898U1 (de) 1981-01-27 1982-07-15 Robert Bosch Gmbh, 7000 Stuttgart Zahnradmaschine (pumpen oder motor)
DE2411492C2 (de) 1974-03-11 1984-07-26 Robert Bosch Gmbh, 7000 Stuttgart Zahnradpumpe
US6857860B1 (en) 2000-05-08 2005-02-22 Pomtava Sa Metering pump for liquid products

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3312868C2 (de) * 1983-04-09 1986-03-20 Glyco-Antriebstechnik Gmbh, 6200 Wiesbaden Hydropumpe
JP3169146B2 (ja) * 1992-08-06 2001-05-21 株式会社豊田自動織機製作所 車両用暖房装置
CA2176404A1 (fr) * 1996-05-08 1997-11-09 Yuri Belman Pompe a engrenage et joint d'etancheite pour applications sous vide
DE19942297A1 (de) * 1999-09-04 2001-03-08 Bosch Gmbh Robert Zahnradmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1822807U (de) 1959-01-15 1960-12-01 Kirk & Kompagni Zahnradpumpe fuer homogenisatoren.
DE1927514U (de) 1965-08-25 1965-11-18 Bayerische Motoren Werke Ag Heiz- und belueftungsvorrichtung zum einbau vor oder unter das armaturenbrett von kraftfahrzeugen.
DE6924726U (de) 1969-06-19 1969-10-16 V D O Tachometer Werke Adolf S Zahnradpumpe oder -motor
DE2411492C2 (de) 1974-03-11 1984-07-26 Robert Bosch Gmbh, 7000 Stuttgart Zahnradpumpe
DE8101898U1 (de) 1981-01-27 1982-07-15 Robert Bosch Gmbh, 7000 Stuttgart Zahnradmaschine (pumpen oder motor)
US6857860B1 (en) 2000-05-08 2005-02-22 Pomtava Sa Metering pump for liquid products

Also Published As

Publication number Publication date
ES2688647T3 (es) 2018-11-06
EP2216550A3 (fr) 2016-07-27
DE202009001525U1 (de) 2010-06-24
PL2216550T3 (pl) 2018-12-31
EP2216550B1 (fr) 2018-07-25

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