EP0465757B1 - Pompe de circulation d'eau de refroidissement - Google Patents

Pompe de circulation d'eau de refroidissement Download PDF

Info

Publication number
EP0465757B1
EP0465757B1 EP91101184A EP91101184A EP0465757B1 EP 0465757 B1 EP0465757 B1 EP 0465757B1 EP 91101184 A EP91101184 A EP 91101184A EP 91101184 A EP91101184 A EP 91101184A EP 0465757 B1 EP0465757 B1 EP 0465757B1
Authority
EP
European Patent Office
Prior art keywords
cooling water
water pump
bearing
ring
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.)
Expired - Lifetime
Application number
EP91101184A
Other languages
German (de)
English (en)
Other versions
EP0465757A3 (en
EP0465757A2 (fr
Inventor
Bernhard Dr. Gesenhues
Detlef Dr. Cordts
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.)
Carl Freudenberg KG
Original Assignee
Carl Freudenberg KG
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 Carl Freudenberg KG filed Critical Carl Freudenberg KG
Priority to AT91101184T priority Critical patent/ATE98748T1/de
Publication of EP0465757A2 publication Critical patent/EP0465757A2/fr
Publication of EP0465757A3 publication Critical patent/EP0465757A3/de
Application granted granted Critical
Publication of EP0465757B1 publication Critical patent/EP0465757B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/08—Sealings
    • F04D29/10—Shaft sealings
    • F04D29/106—Shaft sealings especially adapted for liquid pumps

Definitions

  • the invention relates to a cooling water pump for an internal combustion engine, comprising a bearing cover which can be fixed to a pump housing and in which a pump shaft provided with an impeller is rotatably mounted by means of a bearing, the bearing cover and the pump shaft being sealed off from one another by a sealing element which is located in the space between the impeller and bearing is arranged and wherein an annular space provided with a ventilation device is provided in the axial intermediate space of the bearing and the sealing element.
  • Such a cooling water pump is known from DE-A-38 21 352.
  • the annular space provided with the venting device is provided in order to discharge leakage liquid and to keep it away from the bearing.
  • the invention has for its object to develop such cooling water pumps such that there is a reduction in the axial length of the annulus.
  • the ventilation device comprises at least two openings of the shaft which lie opposite one another on the bearing cover, whereby in the intermediate space axially between the ventilation openings and the bearing at least one absorbent ring sealingly sealing the shaft is provided, which ring additionally Bearing cover assigned sealingly and is covered on the side facing the bearing by a liquid-impermeable layer. Passing the sealing gap and cooling liquid creeping along the shaft is temporarily absorbed in the ring, with continuous evaporation taking place over the surface thereof facing the sealing element and evacuation of the steam through the ventilation openings which are provided on opposite sides of the shaft.
  • the sealing element For the temporary storage of the coolant in the sealing element, it is not absolutely necessary for the sealing element to come into contact with the shaft, but it is entirely possible to provide a gap of capillary-active narrowness between the two parts. This can prevent loss of friction and operational wear.
  • the evaporation of the coolant is, on the one hand, the relatively high temperature of the pump shaft and the sealing element that results during the intended use and, on the other hand, the pumping effect that results from the rotary movement of the pump shaft.
  • the ring is sealingly assigned to the bearing cap, which includes a direct contact or an approach up to a short distance.
  • the annular space is completely covered in the radial direction in such an embodiment, which necessitates a substantial improvement in the protective effect which results with respect to the bearing.
  • the ring is covered with a liquid-impermeable layer on the side facing the bearing.
  • a liquid-impermeable layer on the side facing the bearing.
  • This can consist, for example, of a coating of polymeric material molded on in the liquid state.
  • an annular disk made of liquid-impermeable material for example made of metal or plastic, independently of the ring, can also be included in the considerations and, with appropriate calibration of the inner or outer circumference, facilitates the non-rotatable fixing of the ring on the bearing cap.
  • the ring is generally rectangular in profile. Versions with an angular profile can be more easily assigned to the pump shaft and housing with the required accuracy. They have a relatively enlarged surface, which favors the evaporation of the coolant absorbed.
  • the ring can be non-rotatably connected to the shaft or the bearing cover.
  • An embodiment in which the ring is non-rotatably connected to the bearing cover is preferred in the context of the present invention.
  • the air throughput through the annular space is favored by convection processes under normal operating conditions if the openings comprise at least one opening arranged above and at least one below the axis, about which the pump shaft can be rotated. At least one of these openings should expediently be provided in the region of the highest and at least one of these openings in the region of the lowest point of the annular space. In addition, there is the advantage in this case that the accumulation of cooling liquid in the annular space is prevented.
  • the ring can consist of an open-cell foam, for example a polyurethane foam.
  • the mechanical and chemical resistance is much greater if the ring consists of an intrinsically strong fiber material, for example a matted material, a nonwoven fabric, a woven and / or a knitted fabric.
  • the fibers used can be of any type and include those of natural, mineral or synthetic origin.
  • a cooling water pump for an internal combustion engine is shown in longitudinal section, comprising a bearing cover 2 which can be fixed to a pump housing 1 and in which a pump shaft 4 provided with an impeller 3 is rotatably mounted by means of a bearing 5, the bearing cover 2 and the pump shaft 4 are sealed against each other by a sealing element 6, which is arranged in the space between the impeller 3 and the bearing 5 and wherein an annular space 7 provided with a ventilation device is provided in the axial space between the bearing 5 and the sealing element 6.
  • the sealing element consists in the illustrated embodiment from a mechanical seal. It can optionally be replaced by a lip seal or another design of a sealing element.
  • the inner diameter of the annular ring 10 is dimensioned such that there is a relatively movable surface contact or a capillary-active gap with respect to the shaft 4. Cooling liquid passing through the sealing gap of the sealing element 6 is thereby fed continuously during the intended use of the pore structure of the ring 10 and temporarily stored therein. Due to the high temperature of the pump shaft 4 and the end face of the sealing element 6 facing the ring 10, cooling liquid stored in the ring 10 is continuously evaporated. The cooling liquid evaporating over its end face is absorbed by the air that passes through the annular space via the ventilation opening and discharged from the annular space 7 via the ventilation opening 9.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Compressor (AREA)
  • Sampling And Sample Adjustment (AREA)

Claims (10)

  1. Pompe à eau de refroidissement pour un moteur à combustion interne, comportant un couvercle de palier (2) pouvant être fixé sur un corps de pompe (1) et où est monté à rotation, au moyen d'un palier (5), un arbre de pompe (4) pourvu d'une roue à palettes (3), l'étanchéité mutuelle du couvercle de palier (2) et de l'arbre de pompe (4) étant assurée par un élément d'étanchéité (6) qui est disposé dans le volume intercalaire existant entre la roue à palettes (3) et le palier (5) tandis qu'il est prévu, dans l'intervalle axial existant entre le palier et l'élément d'étanchéité, un volume annulaire (7) pourvu d'un dispositif de purge d'air, caractérisée en ce que le dispositif de purge d'air comprend au moins deux orifices (8, 9) traversant le couvercle de palier (2) sur des côtés mutuellement opposés de l'arbre (4) et en ce qu'il est prévu dans le volume intercalaire (7), axialement entre les orifices de purge d'air (8, 9) et le palier (5), au moins une bague (10) capable d'aspiration, entourant l'arbre (4) et qui est associée additionnellement de façon étanche au couvercle de palier (2), en étant recouverte, sur le côté dirigé vers le palier (5), par une couche (11) imperméable au liquide.
  2. Pompe à eau de refroidissement selon la revendication 1, caractérisée en ce que la bague (10) est reliée de façon non tournante à l'arbre de pompe (4) ou au couvercle de palier (2).
  3. Pompe à eau de refroidissement selon les revendications 1 et 2, caractérisée en ce que les orifices de purge d'air (8, 9) comprennent au moins un orifice de purge d'air situé au-dessus d'un axe (12) autour duquel peut tourner l'arbre de pompe (4), au moins un orifice de purge d'air situé en dessous dudit axe (12).
  4. Pompe à eau de refroidissement selon la revendication 3, caractérisée en ce qu'il est prévu au moins un orifice de purge d'air (9) dans la zone la plus haute du volume annulaire (7) et au moins un orifice de purge d'air (8) dans la zone la plus basse du volume annulaire (7).
  5. Pompe à eau de refroidissement selon une des revendications 1 à 4, caractérisée en ce que la bague (10) a une forme d'anneau circulaire.
  6. Pompe à eau de refroidissement selon une des revendications 1 à 5, caractérisée en ce que la bague (10) se compose d'une matière expansée à pores ouverts.
  7. Pompe à eau de refroidissement selon une des revendications 1 à 5, caractérisée en ce que la bague (10) se compose d'une matière fibreuse intrinsèquement solide.
  8. Pompe à eau de refroidissement selon la revendication 7, caractérisée en ce que la matière fibreuse comporte des fibres naturelles et/ou synthétiques.
  9. Pompe à eau de refroidissement selon la revendication 8, caractérisée en ce que la matière fibreuse est imprégnée d'un matériau fixant l'eau (superabsorbant).
  10. Pompe à eau de refroidissement selon une des revendications 1 à 9, caractérisée en ce que la bague (10) a un profil en forme de L.
EP91101184A 1990-07-07 1991-01-30 Pompe de circulation d'eau de refroidissement Expired - Lifetime EP0465757B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT91101184T ATE98748T1 (de) 1990-07-07 1991-01-30 Kuehlwasserpumpe.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4021716 1990-07-07
DE4021716 1990-07-07

Publications (3)

Publication Number Publication Date
EP0465757A2 EP0465757A2 (fr) 1992-01-15
EP0465757A3 EP0465757A3 (en) 1992-02-19
EP0465757B1 true EP0465757B1 (fr) 1993-12-15

Family

ID=6409882

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91101184A Expired - Lifetime EP0465757B1 (fr) 1990-07-07 1991-01-30 Pompe de circulation d'eau de refroidissement

Country Status (6)

Country Link
US (1) US5131809A (fr)
EP (1) EP0465757B1 (fr)
JP (1) JPH086709B2 (fr)
AT (1) ATE98748T1 (fr)
DE (1) DE59100720D1 (fr)
ES (1) ES2047347T3 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5154576A (en) * 1991-09-30 1992-10-13 General Motors Corporation Coolant pump drip collector with improved capacity
US5660521A (en) * 1996-03-19 1997-08-26 Navistar International Transportation Corp. Water pump seal coolant wick
GB2334559B (en) * 1998-02-20 2002-05-15 Rover Group A water pump seal arrangement
US6354249B1 (en) 2000-06-13 2002-03-12 Kohler Co. Engine with coolant pump
US6752590B2 (en) 2002-09-26 2004-06-22 International Engine Intellectual Property Company, Llc Water pump and impeller therefor
US8550039B2 (en) * 2010-10-28 2013-10-08 GM Global Technology Operations LLC Pump assembly and method of manufacturing same
DE102018123908A1 (de) * 2018-09-27 2020-04-02 Nidec Gpm Gmbh Wälzlager mit Dichtungsanordnung und Wasserpumpe mit demselben
DE102018133464A1 (de) * 2018-12-21 2020-06-25 Nidec Gpm Gmbh Fahrzeugpumpenvorrichtung zum Pumpen einer Flüssigkeit und Verfahren zum Umgang mit einer Leckage-Flüssigkeit in der Fahrzeugpumpenvorrichtung

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1520939A (en) * 1921-01-10 1924-12-30 Worthington Pump & Mach Corp Pump sealing and testing device
US2150078A (en) * 1938-06-28 1939-03-07 Pollock Jim Driving and sealing means for rotary fluid impellers
FR898840A (fr) * 1943-09-06 1945-05-08 Dispositif d'entraînement de pompe rotative à liquide
GB1359380A (en) * 1972-01-24 1974-07-10 Skf Uk Ltd Water circulating pumps for internal combustion engines
JPS62150596A (ja) * 1985-12-25 1987-07-04 Nec Corp 半導体記憶装置
JPS62150596U (fr) * 1986-03-17 1987-09-24
JPS63191236U (fr) * 1987-05-29 1988-12-09
US4768923A (en) * 1987-06-09 1988-09-06 General Motors Corporation Combined water pump, bearing and seal assembly
DE3821352C1 (fr) * 1988-06-24 1989-11-02 Goetze Ag, 5093 Burscheid, De

Also Published As

Publication number Publication date
DE59100720D1 (de) 1994-01-27
EP0465757A3 (en) 1992-02-19
ES2047347T3 (es) 1994-02-16
EP0465757A2 (fr) 1992-01-15
US5131809A (en) 1992-07-21
JPH04262095A (ja) 1992-09-17
ATE98748T1 (de) 1994-01-15
JPH086709B2 (ja) 1996-01-29

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