WO2024104734A1 - Agencement d'étanchéité avec partie bride et arbre monté rotatif - Google Patents

Agencement d'étanchéité avec partie bride et arbre monté rotatif Download PDF

Info

Publication number
WO2024104734A1
WO2024104734A1 PCT/EP2023/079505 EP2023079505W WO2024104734A1 WO 2024104734 A1 WO2024104734 A1 WO 2024104734A1 EP 2023079505 W EP2023079505 W EP 2023079505W WO 2024104734 A1 WO2024104734 A1 WO 2024104734A1
Authority
WO
WIPO (PCT)
Prior art keywords
region
sealing
ring
split ring
leg region
Prior art date
Application number
PCT/EP2023/079505
Other languages
German (de)
English (en)
Inventor
Thomas Knaus
Tobias Goldschmidt
Jessica Altmayer
Alex Jörg SCHMELING
Original Assignee
Sew-Eurodrive Gmbh & Co. 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 Sew-Eurodrive Gmbh & Co. Kg filed Critical Sew-Eurodrive Gmbh & Co. Kg
Publication of WO2024104734A1 publication Critical patent/WO2024104734A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/164—Sealings between relatively-moving surfaces the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3248—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports
    • F16J15/3252—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports
    • F16J15/3256—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals
    • F16J15/3264—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings provided with casings or supports with rigid casings or supports comprising two casing or support elements, one attached to each surface, e.g. cartridge or cassette seals the elements being separable from each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings
    • F16J15/3276—Mounting of sealing rings with additional static sealing between the sealing, or its casing or support, and the surface on which it is mounted

Definitions

  • the invention relates to a sealing arrangement with a flange part and a rotatably mounted shaft.
  • a semi-integrated sealing system is known from DE 196 52 000 A1 as the closest state of the art.
  • a rolling bearing is known from DE 11 2015 002 746 T5.
  • a sealing system is known from JP S62-156667 U.
  • a shaft seal with a shaft sealing ring is known from DE 10 2018 122 000 A1.
  • a shaft seal is known from DE 23 22 458 A.
  • a shaft seal is also known from DD 62 972 A1.
  • the invention is therefore based on the object of improving the sealing of an electric motor.
  • the object is achieved in the sealing arrangement according to the features specified in claim 1.
  • a sealing ring is placed on the shaft and/or is connected to the shaft in a force-locking and/or rotationally fixed manner, wherein the shaft protrudes through a bore in the flange part, wherein a split ring is received in the bore of the flange part and/or is clamped into the bore and/or is non-positively connected to the flange part, wherein a sealing lip of the sealing ring seals radially inwardly towards a running surface formed on the split ring, in particular wherein the sealing lip is held by an axially projecting support region of the sealing ring which is less stiffened than the rest of the sealing ring, in particular is not stiffened.
  • the advantage here is that the sealing ring is arranged on the shaft and the sealing lip still presses radially inwards onto the running surface.
  • the protruding holder of the sealing lip is important for this. This is because the holder, i.e. the second leg area of the sealing ring that acts as a support area for the sealing lip, protrudes between the leg areas of the split ring and can therefore be elastically deflected, in particular by centrifugal force. In this way, a reduction in the contact pressure is possible depending on the speed. When the shaft is at a standstill, a high contact pressure can be achieved and thus a good seal.
  • the split ring has a first leg region, which in particular runs continuously in the circumferential direction, and the split ring has a second leg region, which in particular runs continuously in the circumferential direction, and the first leg region of the split ring is arranged radially inside the second leg region of the split ring and is connected to the second leg region of the split ring via a yoke region of the split ring.
  • the advantage here is that it can be easily manufactured as a rubberized or overmolded sheet metal part.
  • the split ring can therefore be manufactured easily and inexpensively. It also seals well against the bore, as its elastic surface material conforms to the bore.
  • the sealing ring has a first leg region, which runs continuously in particular in the circumferential direction, wherein the sealing ring has a second leg region, in particular one that runs continuously in the circumferential direction, wherein the first leg region of the sealing ring is arranged radially inside the second leg region of the sealing ring and is connected to the second leg region of the sealing ring via a yoke region of the split ring.
  • the advantage here is that the U-shaped cross section makes it possible for the sealing lip to work in a direction towards the sealing seat of the sealing ring. This is because the second leg region enables the sealing lip to be cantilevered and the running surface to be pushed in between the two leg regions of the sealing ring.
  • the sealing lip is radially spaced from the sealing seat of the sealing ring formed on the shaft, it is possible to align the sealing lip towards the sealing seat.
  • the metallic and smooth exposed running surface of the stiffening part of the split ring that is pushed in between has only a slightly larger diameter than the sealing seat and therefore only causes a slightly greater relative speed. In contrast to an alignment of the sealing lip radially outwards, the relative speed is much lower.
  • the advantage here is that it can be easily manufactured as a rubberized or molded sheet metal part. This means that the sealing ring can be manufactured easily and inexpensively. It also seals well against the shaft because its elastic surface material conforms to the shaft.
  • the first leg region of the split ring projects into the space between the first leg region of the sealing ring and the second leg region of the sealing ring, in particular so that the first leg region of the split ring is arranged radially between the first leg region of the sealing ring and the second leg region of the sealing ring, in particular wherein the axial region covered by the first leg region of the split ring overlaps with the axial region covered by the first leg region of the sealing ring and/or with the axial region covered by the second leg region of the sealing ring.
  • the advantage here is that the sealing lip works radially inward against the running surface.
  • the second leg region of the sealing ring projects into the space between the first leg region of the split ring and the second leg region of the split ring, in particular so that the first leg region of the sealing ring is arranged radially between the first leg region of the split ring and the second leg region of the split ring, in particular wherein the axial region covered by the second leg region of the sealing ring overlaps with the axial region covered by the first leg region of the split ring and/or with the axial region covered by the second leg region of the split ring.
  • the advantage here is that the sealing lip is directed radially inward against the running surface and thus does not work radially outward, but radially inward, i.e. is exposed to a lower speed.
  • each of the leg regions of the split ring and the sealing ring is designed to be completely, in particular uninterrupted, circumferential. It is advantageous that both rings are designed as rotating bodies.
  • the sealing ring is made of a rubber or a plastic, in particular NBR.
  • the stiffening part of the split ring is rubberized and/or overmolded with a plastic, with the exception of the running surface for the sealing lip of the sealing ring. It is advantageous that a metallic running surface is provided.
  • a stiffening part particularly realized as a one-piece and/or one-part sheet metal part, is arranged in the split ring, which stiffens the first leg region of the split ring, the second leg region of the split ring and the yoke region of the split ring.
  • the advantage here is that cost-effective production can be achieved.
  • a stiffening part, particularly realized as a one-piece and/or one-part sheet metal part is arranged in the sealing ring, which stiffens the first leg region of the sealing ring and the yoke region of the sealing ring, but in particular not the second leg region of the sealing ring.
  • the advantage here is that cost-effective production is possible.
  • a stiffening part particularly realized as a one-piece and/or one-part sheet metal part, is arranged in the sealing ring, which stiffens the first leg region of the sealing ring and the yoke region of the sealing ring and is spaced from the second leg region of the sealing ring.
  • the advantage here is that the sealing ring can be designed to be dimensionally stable, whereby the second leg region is not stiffened and is thus elastically deformable.
  • each leg region is spaced apart from all other leg regions.
  • the advantage here is that the leg regions can be arranged in a nested manner.
  • the first leg region of the split ring is spaced from the shaft, with the yoke region of the split ring projecting radially inward beyond the first leg region of the split ring.
  • the first leg region of the split ring is spaced from the shaft, with the yoke region of the split ring projecting radially inward beyond the first leg region of the split ring in such a way that the radial distance region covered by the first leg region of the split ring is contained in and/or encompassed by the radial distance region covered by the yoke region of the split ring. It is advantageous that the yoke region projects radially towards the shaft, with a gap remaining between the yoke region of the split ring and the shaft. In an advantageous embodiment, the yoke area of the sealing ring is placed and/or clamped onto the shaft and/or connected to the shaft in a force-locking manner. The advantage here is that the sealing ring is mounted tightly against the shaft and simple production is possible.
  • the split ring limits the sealing ring axially, in particular in the axial direction.
  • the advantage here is that it enables simple assembly.
  • the first leg area of the sealing ring borders on the yoke area of the split ring and/or is positioned against the yoke area of the split ring.
  • the running surface is formed on the stiffening part of the split ring.
  • the advantage here is that a smooth metallic running surface is available for the sealing lip.
  • the sealing ring is arranged in the interior of the drive component and the split ring forms the housing together with the flange part, in particular for the drive component.
  • the advantage here is that an improved seal is achieved, which generates less friction torque during operation and seals reliably when stationary.
  • Figure 1 shows a sealing arrangement according to the invention for an electric motor in sectional view.
  • the electric motor has a sealing arrangement against dust and/or water.
  • the shaft 1 which functions as a rotor shaft, is rotatably mounted, in particular relative to the stator housing of the electric motor, in particular via bearings accommodated in flange parts.
  • a first flange part 2 is arranged stationary, in particular connected in a rotationally fixed manner to the stator housing of the electric motor.
  • the flange part 2 has a through hole through which the shaft 1 protrudes.
  • a split ring 22 is accommodated in the bore and is clamped in place, i.e. in particular elastically pre-stressed.
  • the split ring 22 preferably presses against the wall of the bore, since it is elastically shrunk into the bore.
  • a gap area that runs completely around the circumference is formed between the split ring and the shaft 1. As a result, no friction occurs between the split ring 22 and the shaft 1.
  • the split ring has a stiffening part 30.
  • the stiffening part 30 is a rotational body which is produced by rotating a U-shaped area, wherein the U is in is open in the axial direction.
  • the two legs of the U-shaped area are each designed as a hollow cylinder and are connected to one another via a yoke.
  • the stiffening part 30 can be produced by forming a piece of sheet metal.
  • the stiffening part 30 is designed in one piece and/or in one part.
  • the stiffening part 30 is rubberized or overmolded with a plastic, in particular NBR, to form the split ring 22, wherein a surface area of the metallic stiffening part 30 acting as a running surface for a sealing lip 23 of the sealing ring 20 is uncovered, in particular without rubberization and without covering by plastic.
  • a plastic in particular NBR
  • the sealing ring 20 is pushed onto the shaft 1 and is connected to the shaft in a force-fitting manner, in particular by shrinking.
  • the sealing ring 20 is designed as a rotating body which is formed by rotation of a generating U-shaped region, in particular wherein this mathematically conceived rotation takes place around the axis of rotation of the shaft.
  • the U is open opposite to the axial direction, in particular in the opposite direction to the U-shaped area of the split ring 22.
  • the sealing ring 20 thus has a first, radially inner leg region, which rests on the shaft 1, and a second, radially outer leg region, which is designed as a support region 21 for the sealing lip of the sealing ring 20.
  • the two leg regions are connected via a high region of the sealing ring 20.
  • the first leg region is thus spaced apart from the second leg region in the radial direction.
  • the first leg region is arranged radially within the second leg region.
  • the radial direction, the axial direction and the circumferential direction are always related to the axis of rotation of shaft 1.
  • the first leg region of the sealing ring 20 is less extended in the axial direction than the second leg region of the sealing ring 20.
  • a sheet metal part acting as a stiffening part is also arranged in the sealing ring.
  • the first leg area can be designed with a tapered wall thickness towards the yoke area. This means that elastic deformation can be achieved here with low forces.
  • the end area of the first leg area that includes the sealing lip 23 has a thicker wall thickness and therefore a correspondingly large mass.
  • the sealing lip 23 is pressed by elastic preload onto the area of the split ring 22 that functions as a running surface.
  • the radially inner leg region of the split ring 22 projects into the U of the sealing ring 20, i.e. radially between the leg regions of the sealing ring 20. In this way, a labyrinth channel 31 is formed, which further complicates the penetration of dirt, dust and/or water.
  • the radial distance area covered by the split ring 22 overlaps with the radial distance area covered by the sealing ring 20.
  • the radial distance area covered by the yoke area of the sealing ring 20 includes the radial distance area covered by the radially inner leg area of the split ring 22.
  • the sealing lip 23 is wave-shaped in the circumferential direction.
  • the axial position of the sealing lip is a periodic, in particular not vanishing function of the circumferential angle. This sinusoidal shape, for example, creates a pumping effect and thus increases tightness.
  • the support region 21 has an inner cone on its radial inner side, in particular with a radially inward, conical inner side.
  • the sealing lip 23 seals according to the invention in a radially inward direction towards the running surface formed on the split ring, although the sealing ring is connected to the shaft in a rotationally fixed manner and thus the bore radially surrounds and/or encloses the sealing ring 20.
  • the running surface is therefore located radially inside the sealing lip 20.
  • the sealing ring 20 also has a U-shaped cross section with a half-plane, the normal direction of which is aligned parallel to the axis of rotation of the shaft and which is limited by circumferential angle values between 0° and 180°.
  • the sealing ring 20 is produced by a mathematically imaginary rotation of the U-shaped cross section, in particular as a rotating body.
  • the split ring 22 also has a U-shaped cross section with a half-plane whose normal direction is aligned parallel to the axis of rotation of the shaft and which is limited by circumferential angle values between 0° and 180°.
  • the split ring 22 is produced by a mathematically imaginary rotation of the U-shaped cross section, in particular as a rotating body.
  • the radially inner leg region of the split ring 22 projects into the U-shape, in particular into the U-shaped cross section, of the sealing ring 20. Accordingly, the radially inner leg region of the sealing ring 20 projects into the U-shape, in particular into the U-shaped cross section, of the sealing ring 20.
  • the U-shapes are therefore open in opposite directions to each other.
  • the stiffening part molded into the sealing ring 20 is designed with an L-shaped cross-section, so that only the yoke region and the radially inner leg region of the sealing ring 20 are supported and stiffened by a metallic stiffening part; the radially outer leg region of the sealing ring 20 is not stiffened and can therefore be deflected by a slight centrifugal force, in particular radially outward from the running surface on the split ring 22, and can be lifted off, in particular from the metallic stiffening part.
  • the sealing lip is pressed tightly against the shaft 1 when the shaft 1 is at rest. Since the split ring 22 lies tightly against the flange part 2 and the sealing ring 20 lies tightly against the shaft 1, the shaft 1 is sealed against the flange part and the shaft 1 is held with a high static friction. In particular, the associated adhesive torque is lower than the starting torque or starting torque of the electric motor. When the shaft 1 rotates, the sealing lip is pressed less against the shaft 1 or even lifted off. This means that there is less friction or even no friction at all. The sealing effect is nevertheless maintained because the pumping effect of the sealing lip increases with increasing speed, in particular because the axial position of the sealing lip 23, in particular on the running surface, is a periodic function of the circumferential angle.
  • both leg areas and the yoke area of the split ring 22 are stiffened by means of the metallic stiffening part.
  • the sealing ring 20 as mentioned above, only the radially inner leg area and the yoke area are stiffened.
  • the yoke area of the split ring 22 together with the gap area, in particular the annular gap formed between shaft 1 and split ring 22, covers the entire radial area between shaft 1 and flange part 2.
  • the radial distance area covered by the gap area is included in the radial distance area covered by the radially inner leg area of the sealing ring 20.
  • the yoke region of the split ring 22 is, in contrast to Figures 2 and 3, axially widened in its region adjacent to the shaft 1 in such a way that the sealing ring 20 is axially delimited by the split ring 22, in particular by its yoke region. This enables simplified assembly.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sealing With Elastic Sealing Lips (AREA)

Abstract

L'invention concerne un ensemble d'étanchéité comprenant une partie bride (2) et un arbre monté rotatif (1), une bague d'étanchéité (20) étant poussée sur l'arbre et/ou étant reliée à l'arbre par ajustement de force et/ou par rotation, l'arbre faisant saillie à travers un alésage de la partie bride, une bague fendue (22) étant reçue dans l'alésage de la partie bride et/ou étant serrée dans l'alésage et/ou étant reliée par ajustement de force à la partie bride, une lèvre d'étanchéité (23) de la bague d'étanchéité, dirigée radialement vers l'intérieur, assurant l'étanchéité par rapport à une surface de roulement formée sur la bague fendue.
PCT/EP2023/079505 2022-11-17 2023-10-23 Agencement d'étanchéité avec partie bride et arbre monté rotatif WO2024104734A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102022004253 2022-11-17
DE102022004253.3 2022-11-17

Publications (1)

Publication Number Publication Date
WO2024104734A1 true WO2024104734A1 (fr) 2024-05-23

Family

ID=88558617

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2023/079505 WO2024104734A1 (fr) 2022-11-17 2023-10-23 Agencement d'étanchéité avec partie bride et arbre monté rotatif

Country Status (2)

Country Link
DE (1) DE102023004254A1 (fr)
WO (1) WO2024104734A1 (fr)

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2509461A (en) 1946-03-22 1950-05-30 Chicago Rawhide Mfg Co Seal
DE2322458A1 (de) 1973-05-04 1974-11-21 Zahnradfabrik Friedrichshafen Wellendichtung
JPS62156667U (fr) 1986-03-28 1987-10-05
DE19652000A1 (de) 1995-12-14 1997-06-19 Sabo Ind & Comercio Ltda Semi-Integriertes Dichtungssystem
EP1122472A2 (fr) * 2000-02-01 2001-08-08 Lenze GmbH & Co. KG Etanchéité entre un arbre tournant et un logement fixe
EP2990698A1 (fr) * 2014-08-26 2016-03-02 Aktiebolaget SKF Joint dynamique à faible frottement
CN205371639U (zh) * 2015-12-03 2016-07-06 邓伦胜 一种多级唇形厢式密封装置
DE112015002746T5 (de) 2014-06-11 2017-05-11 Schaeffler Technologies AG & Co. KG Wälzlager
DE102018122000A1 (de) 2018-09-10 2020-03-12 BRUSS Sealing Systems GmbH Wellendichtung mit einem Wellendichtring
EP4043760A1 (fr) * 2021-02-12 2022-08-17 Flender GmbH Agencement d'étanchéité, ensemble carter, engrenage, application industrielle et produit programme informatique

Patent Citations (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2509461A (en) 1946-03-22 1950-05-30 Chicago Rawhide Mfg Co Seal
DE2322458A1 (de) 1973-05-04 1974-11-21 Zahnradfabrik Friedrichshafen Wellendichtung
JPS62156667U (fr) 1986-03-28 1987-10-05
DE19652000A1 (de) 1995-12-14 1997-06-19 Sabo Ind & Comercio Ltda Semi-Integriertes Dichtungssystem
EP1122472A2 (fr) * 2000-02-01 2001-08-08 Lenze GmbH & Co. KG Etanchéité entre un arbre tournant et un logement fixe
DE112015002746T5 (de) 2014-06-11 2017-05-11 Schaeffler Technologies AG & Co. KG Wälzlager
EP2990698A1 (fr) * 2014-08-26 2016-03-02 Aktiebolaget SKF Joint dynamique à faible frottement
CN205371639U (zh) * 2015-12-03 2016-07-06 邓伦胜 一种多级唇形厢式密封装置
DE102018122000A1 (de) 2018-09-10 2020-03-12 BRUSS Sealing Systems GmbH Wellendichtung mit einem Wellendichtring
US11231110B2 (en) * 2018-09-10 2022-01-25 BRUSS Sealing Systems GmbH Shaft seal having a shaft sealing ring
EP4043760A1 (fr) * 2021-02-12 2022-08-17 Flender GmbH Agencement d'étanchéité, ensemble carter, engrenage, application industrielle et produit programme informatique

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