CH616729A5 - Mechanical seal for oil pumps - Google Patents

Mechanical seal for oil pumps Download PDF

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Publication number
CH616729A5
CH616729A5 CH906576A CH906576A CH616729A5 CH 616729 A5 CH616729 A5 CH 616729A5 CH 906576 A CH906576 A CH 906576A CH 906576 A CH906576 A CH 906576A CH 616729 A5 CH616729 A5 CH 616729A5
Authority
CH
Switzerland
Prior art keywords
grooves
mechanical seal
oil
ring
pumps
Prior art date
Application number
CH906576A
Other languages
German (de)
Inventor
Hans Peter Glud Nylykke
Original Assignee
Danfoss As
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 Danfoss As filed Critical Danfoss As
Publication of CH616729A5 publication Critical patent/CH616729A5/en

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/08Sealings
    • F04D29/10Shaft sealings
    • F04D29/106Shaft sealings especially adapted for liquid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/72Sealings
    • F16C33/74Sealings of sliding-contact bearings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/16Sealings between relatively-moving surfaces
    • F16J15/34Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3404Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
    • F16J15/3408Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
    • F16J15/3412Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with cavities
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16JPISTONS; CYLINDERS; SEALINGS
    • F16J15/00Sealings
    • F16J15/16Sealings between relatively-moving surfaces
    • F16J15/34Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
    • F16J15/3404Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal
    • F16J15/3408Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface
    • F16J15/3424Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member and characterised by parts or details relating to lubrication, cooling or venting of the seal at least one ring having an uneven slipping surface with microcavities

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Sealing (AREA)

Description

616729 616729

2 2

Claims (2)

PATENTANSPRÜCHEPATENT CLAIMS 1. Gleitringdichtung für Ölpumpen, mit einem stationären Gegenring aus Metall und einem umlaufenden Gleitring aus Kohlenstoff und mit einer in einem Ölpumpengehäuse anzubringenden, auf den Gleitring einwirkenden Feder, welche einen Anpressdruck erzeugt, wobei Nuten mit einer gleichsinnigen Neigung zur Radialrichtung zwecks Rückpumpens vorhanden sind, dadurch gekennzeichnet, dass die angenähert geraden Nuten (5) im Gegenring (2) als Schleifriefen mit einer Rauhtiefe von 0,1-0,8 Jim ausgebildet sind, vom Innenrand der Gleitfläche (7) zu deren Aussenrand verlaufen, und der Planheits-Fehler des Gegenringes (2), beim Umkreis gemessen, weniger als 6 [im beträgt.1. Mechanical seal for oil pumps, with a stationary counter ring made of metal and a rotating sliding ring made of carbon and with a spring which is to be fitted in an oil pump housing and acts on the sliding ring, which generates a contact pressure, with grooves having an inclination in the same direction to the radial direction for the purpose of pumping back, characterized in that the approximately straight grooves (5) in the mating ring (2) are designed as grinding grooves with a peak-to-valley height of 0.1-0.8 Jim, running from the inner edge of the sliding surface (7) to its outer edge, and the flatness error of the mating ring (2), measured at the circumference, is less than 6 [im. 2. Gleitringdichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Rauhtiefe der Schleifriefen zwischen 0,2-0,6 (im liegt, und der Planheits-Fehler der Gleitfläche (7) des Gegenringes (2), beim Umkreis gemessen, zwischen 2-5 [im liegt.2. Mechanical seal according to claim 1, characterized in that the peak-to-valley height of the grinding grooves is between 0.2-0.6 (μm, and the flatness error of the sliding surface (7) of the mating ring (2), measured at the circumference, is between 2- 5 [im lies. Die Erfindung bezieht sich auf eine Gleitringdichtung für Ölpumpen, mit einem stationären Gegenring aus Metall und einem umlaufenden Gleitring aus Kohlenstoff und mit einer in einem Ölpumpengehäuse anzubringenden, auf den Gleitring einwirkenden Feder, welche einen Anpressdruck erzeugt, wobei Nuten mit einer gleichsinnigen Neigung zur Radialrichtung zwecks Rückpumpens vorhanden sind.The invention relates to a mechanical seal for oil pumps, with a stationary mating ring made of metal and a rotating sliding ring made of carbon and with a spring which is to be mounted in an oil pump housing and acts on the sliding ring, which generates a contact pressure, with grooves having an inclination in the same direction to the radial direction for the purpose return pumps are present. Bei Gleitdichtungen an Ölpumpen ist bekannt, dass die Stopfbüchsen oft zur Undichtigkeit neigen, da die üblichen Gleitdichtungen nie ganz dicht sind. Es können oftmals einige Tropfen Öl pro Tag auslecken. Jedoch hat es sich bei einigen Anwendungsfällen gezeigt, dass eine solche Undichtigkeit nicht annehmbar ist.In the case of sliding seals on oil pumps, it is known that the stuffing boxes often tend to leak, since the usual sliding seals are never completely tight. It can often leak a few drops of oil a day. However, in some applications it has been found that such leakage is unacceptable. Es ist bekannt, Stopfbüchsen für Pumpen mit Gegenhalteringen herzustellen, an denen sich spiralförmige Rillen oder runde, nach aussen verlaufende Rillen befinden, die eineIt is known to produce stuffing boxes for pumps with retaining rings on which there are spiral grooves or round, outwardly extending grooves that a Pumpwirkung haben, wobei die Richtung von der gewünschten Pumpwirkung und Umlaufrichtung bestimmt wird. Diese Rillen endigen in der Regel vor dem Abschluss des Gegenhalteringes. Hierdurch ergibt sich zwar eine verhältnismässig s dichte Stopfbüchse bei dynamischer Wirkung, da aber eine Pumpe auch bei Stillstand dicht, also statisch dicht sein sollte, ist eine solche Lösung nicht brauchbar.Have pumping action, the direction being determined by the desired pumping action and direction of circulation. These grooves usually end before the end of the counter-retaining ring. Although this results in a relatively s tight stuffing box with dynamic action, but since a pump should also be tight when stationary, ie statically tight, such a solution is not usable. Die vorgenannten Dichtungen haben alle den Nachteil, dass sie nicht zum gewünschten Ergebnis führen und sich nicht für die Massenherstellung von Pumpen für Ölbrenner eignen.The aforementioned seals all have the disadvantage that they do not lead to the desired result and are not suitable for the mass production of pumps for oil burners. Mit der vorliegenden Erfindung soll die Aufgabe gelöst werden, eine Gleitringdichtung zu schaffen, die in der Herstellung billig ist und die vorgenannten Nachteile bezüglich der Undichtigkeit nicht aufweist.The aim of the present invention is to achieve the object of creating a mechanical seal which is inexpensive to manufacture and does not have the aforementioned disadvantages with regard to leakage. Dies wird gemäss der Erfindung durch die kennzeichnenden Merkmale im Anspruch 1 erreicht.This is achieved according to the invention by the characterizing features in claim 1. Die Stopfbüchse ist infolge ihrer richtungsbestimmten Schleifmuster dynamisch und auch statisch dicht, wenn die Bereiche für Rauheit und Ebenheit eingehalten werden.Due to its directional grinding pattern, the stuffing box is dynamically and also statically tight if the ranges for roughness and flatness are observed. Es ist vorteilhaft, wenn die Rauhtiefe der Schleifriefen zwischen 0,2-0,6 |xm liegt und der Planheits-Fehler der Gleitfläche des Gegenringes, beim Umkreis gemessen, zwischen 2-5 [im liegt.It is advantageous if the peak-to-valley height of the grinding marks is between 0.2-0.6 μm and the flatness error of the sliding surface of the mating ring, measured at the circumference, is between 2-5 μm. Bezugnehmend auf die Zeichnung wird die Erfindung näher beispielsweise erläutert, und zwar zeigt:Referring to the drawing, the invention is explained in more detail by way of example, namely: Fig. 1 eine Gleitringdichtung mit Schleifriefen1 shows a mechanical seal with grinding marks Fig. 2 einen Schnitt durch die Gleitringdichtung nach der Linie A-AFig. 2 shows a section through the mechanical seal along the line A-A Fig. 1 zeigt einen Gegenring 2 einer Gleitringdichtung, der einen Innenrand 3 und einen Aussenrand 4 besitzt. Zwischen diesen beiden Rändern befinden sich Schleifriefen 5, die eine gleichsinnige Neigung zur Radialrichtung haben, zwecks Rückpumpens von Lecköl. Die Rauhtiefe dieser richtungsbestimmten, angenähert geraden Schleifriefen 5 liegt zwischen 0,1-0,8 |xm. Der Planheits-Fehler des Gegenringes an der Stirnfläche 7 soll — am Umkreis gemessen—weniger als 6 [im, vorzugsweise etwa 2—5 [xm, betragen.1 shows a mating ring 2 of a mechanical seal, which has an inner edge 3 and an outer edge 4 . Between these two edges there are grinding grooves 5, which have an inclination in the same direction to the radial direction, for the purpose of pumping back leakage oil. The peak-to-valley height of these directionally determined, approximately straight grinding marks 5 is between 0.1-0.8 μm. The flatness error of the mating ring on the end face 7 should be less than 6 μm, preferably about 2-5 μm, measured at the circumference. 1515 2020 2525 3030 BB 1 Blatt Zeichnungen1 sheet of drawings
CH906576A 1976-02-06 1976-07-15 Mechanical seal for oil pumps CH616729A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK48376AA DK136626B (en) 1976-02-06 1976-02-06 Retaining ring for sliding seals.

Publications (1)

Publication Number Publication Date
CH616729A5 true CH616729A5 (en) 1980-04-15

Family

ID=8094065

Family Applications (1)

Application Number Title Priority Date Filing Date
CH906576A CH616729A5 (en) 1976-02-06 1976-07-15 Mechanical seal for oil pumps

Country Status (7)

Country Link
JP (1) JPS605822B2 (en)
CH (1) CH616729A5 (en)
DK (1) DK136626B (en)
FR (1) FR2340471A1 (en)
GB (1) GB1550920A (en)
IT (1) IT1071202B (en)
SE (1) SE428826B (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5899561A (en) * 1981-12-04 1983-06-13 Eagle Ind Co Ltd Method of forming slide surface of seat ring or seal ring in mechanical seal
JPS58127256U (en) * 1982-02-22 1983-08-29 株式会社デンソー Shaft sealing device
FR2538423A1 (en) * 1982-12-27 1984-06-29 Imbert Ste Artisanale Michel Apparatus of the type called "embroidery frame", method for employing it and applications.
JPS6072234U (en) * 1983-10-24 1985-05-21 川上 武 laminated fabric
DE3435643A1 (en) * 1984-09-28 1986-04-10 Hoechst Ag, 6230 Frankfurt LAMINATE
JPS63121530U (en) * 1987-01-30 1988-08-08
GB2572162B (en) * 2018-03-20 2022-11-09 Cummins Ltd Bearing assembly for a turbomachine, and baffle element for the turbomachine
DE102018205104B4 (en) * 2018-04-05 2019-11-07 Carl Freudenberg Kg Sliding ring with microstructure and manufacturing process for it

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1058142A (en) * 1952-06-09 1954-03-15 Air Equipement Improvements to rotary seals
FR1599308A (en) * 1968-06-08 1970-07-15
US3586340A (en) * 1969-06-13 1971-06-22 Timken Co Wear surface and seal construction

Also Published As

Publication number Publication date
GB1550920A (en) 1979-08-22
SE428826B (en) 1983-07-25
FR2340471B1 (en) 1982-04-16
DK136626B (en) 1977-10-31
SE7606939L (en) 1977-08-07
FR2340471A1 (en) 1977-09-02
JPS5297059A (en) 1977-08-15
JPS605822B2 (en) 1985-02-14
DK48376A (en) 1977-08-07
DK136626C (en) 1978-04-10
IT1071202B (en) 1985-04-02

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