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
  • F16J15/328—Manufacturing methods specially adapted for elastic sealings
• • 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
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
  • F16C33/72—Sealings
  • F16C33/76—Sealings of ball or roller bearings
• • 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
  • F16J15/32—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
  • F16J15/3228—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip formed by deforming a flat ring
• • 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
• • 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
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C17/00—Sliding-contact bearings for exclusively rotary movement
  • F16C17/02—Sliding-contact bearings for exclusively rotary movement for radial load only
• • 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
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
  • F16C19/02—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows
  • F16C19/04—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly
  • F16C19/06—Bearings with rolling contact, for exclusively rotary movement with bearing balls essentially of the same size in one or more circular rows for radial load mainly with a single row or balls
• • 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
  • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
  • F16C2320/00—Apparatus used in separating or mixing
  • F16C2320/16—Mixing apparatus

Definitions

• the present invention relates to a sealing ring and a sealing cartridge with a sealing ring according to the invention. Furthermore, the present invention relates to a stirrer with a sealing ring according to the invention.
• a shaft is passed through a housing of the stirring or mixing plant, at the end of a stirrer or the like. Is arranged.
• seals on the shaft passage are necessary.
• pressure differences between the atmosphere and the working chamber may be present.
• a shaft bushing is known in which a seal assembly is provided for sealing the shaft and in addition a throttle and wiper assembly is arranged. In order to avoid that in particular After cleaning processes occur leaks in the seal assembly, the throttle and wiper assembly is provided.
• This throttle and scraper arrangement comprises a separate guide ring and a scraper ring, wherein neither the guide ring nor the scraper ring touch the shaft. Due to the additional arrangement of the throttle and wiper arrangement, however, such a shaft seal results in a relatively long construction in the axial direction, since additional sealing elements are provided for sealing.
• the sealing ring according to the invention for sealing on a rotating component, in particular a shaft or the like.
• the base body has a surface directed toward the rotating component.
• the lip seal which is formed integrally with the base body and thus made of the same material as the base body, is yielding and assumes a sealing function on the rotating component.
• the lip seal is adapted to abut and seal on the rotating component.
• a sealing ring can be provided in which, when shaft movements occur, the base body tracks the lip seal. This ensures that the lip seal always fits optimally against the rotating component during operation.
• the lip seal can be made for example by a non-cutting piercing process from the body.
• the lip seal is only minimally compliant, ie compliant in a predetermined small area.
• the base body is provided as a sliding bearing and directed to the rotating component surface is provided as a sliding bearing surface.
• the sealing ring according to the invention can also assume a bearing function of the rotating component.
• the sealing ring further comprises a separate sliding bearing strip or a sliding bearing ring, which is arranged on the surface facing the rotating component on the base body.
• the sliding bearing belt thus provides regardless of the material of the base body a sliding bearing surface for the sealing ring, so that the material for the sliding bearing strip is arbitrary.
• the sliding bearing strip is a separate component.
• the base body has an annular recess or groove, which is arranged in the surface facing the rotating component.
• the sliding bearing band is arranged in the annular recess.
• the lip seal on a residual stress which is directed toward the body.
• This residual stress of the lip seal ensures that the lip seal always fits as close as possible to the rotating component. Furthermore, the residual stress of the lip seal allows easy centering of the sealing ring around the rotating component.
• the sealing ring is made of a filler comprising a thermoplastic material.
• fibers are used as filler.
• the fibers used for reinforcement are preferably glass fibers or carbon fibers.
• the thermoplastic used is preferably polytetrafluoroethylene (PTFE).
• PTFE polytetrafluoroethylene
• the combination of PTFE with glass fibers has only a low coefficient of thermal expansion, in particular in a temperature range from -10 ° C to + 200 ° C.
• this material has a very good chemical resistance.
• the material has a very low surface tension, so that wetting the surface of the sealing ring is considerably more difficult. This can avoid that unwanted medium adheres to the surface of the sealing ring.
• particles, in particular graphite are used as filler.
• the combination of PTFE with glass fibers has a relatively low coefficient of friction.
• a so-called "stick-slip effect” can be prevented.
• the glass fiber content is preferably in a range of 10 to 20%, particularly preferably 15%, whereby the use of the glass fiber allows a particularly high wear resistance of the material Glass fiber content of the so-called cold flow, ie, a slow, but permanent deformation of the material at an applied compressive stress, contrary.
• further fillers are admixed with the thermoplastic material, such as coal or graphite.
• the base body of the sealing ring is set up such that in normal operation, the base body does not touch the rotating component.
• the base body should come into contact with the latter only when the rotating component moves in the radial direction in order to ensure a corresponding compensating movement of the lip seal and thus ensure a secure seal in each operating state.
• a length of a slot provided between the base body and the lip seal is smaller than one half of a length of the base body in the radial direction. This ensures that the lip seal is not too long and thus could occur in operation, the risk of unwanted tearing of the lip seal from the body.
• the base body has a multiplicity of openings which are set up to receive pins, in particular with play.
• the game is available in particular in the radial direction.
• the arranged in the openings of the body pins prevent unwanted co-rotation of the pressure ring according to the invention with the rotating component. Due to the existing clearance between the openings in the base body and the pins can also be ensured in the radial direction quickly and easily reacting floating bearing of the pressure ring.
• the present invention relates to an assembly with a sealing ring according to the invention and a housing in which the sealing ring is received.
• the housing preferably has a receptacle and a disc, wherein the sealing ring between the receptacle and the disc is arranged.
• the receptacle preferably has an annular flange with an L-shaped cross section, which engages over the sealing ring in the axial direction.
• the assembly comprises an additional sealing element, in particular an O-ring, which is arranged on the sealing ng, and biases the sealing ring in the axial direction of the sealing ring.
• an O-ring which is arranged on the sealing ng, and biases the sealing ring in the axial direction of the sealing ring.
• the present invention relates to a seal cartridge with a plurality of sealing rings according to the invention.
• the sealing rings are preferably arranged in the same directions or in different directions.
• the sealing cartridge has a housing enclosing the sealing rings.
• connections are provided in the housing to z. B. supply a barrier medium in a region between two adjacent sealing rings.
• a pressure on the lip seal can additionally be generated when the lip seal is directed in the direction of the blocking space, to which the blocking medium is supplied.
• the connections can be used for control or monitoring functions.
• the connections can also be used for leakage removal.
• the present invention relates to a stirrer, comprising a rotating shaft, and a sealing ring according to the invention and / or an inventive Assembly.
• the rotating shaft is preferably surrounded by a shaft bushing against which the lip seal of the sealing ring seals.
• a shaft bushing against which the lip seal of the sealing ring seals Preferably, in this case between the base body of the sealing ring and the rotating component an annular gap or an incision exists. In the radial direction, the gap preferably has a width of 0.1 mm.
• the present invention is preferably used in an agitator.
• the sealing ring according to the invention for example in a pump.
• Fig. 1 is a schematic sectional view of a sealing ring according to a first
• FIG. 1 is a schematic, enlarged partial sectional view of Fig. 1,
• Fig. 3 is a schematic sectional view of the sealing ring of Fig. 1 in mounted
• FIG. 4 shows a schematic view of an assembly with a sealing ring according to the invention
• Fig. 5 is a schematic sectional view of a sealing ring according to a second
• Fig. 6 is a schematic sectional view of a seal cartridge with a
• the sealing ring 1 is produced as a one-piece component and comprises a base body 2 and a lip seal 3.
• the lip seal 3 is produced by cutting the base body 2 on the inner circumference, so that a slot 4 between parts of the lip seal 3 and the main body 2 is formed.
• a depth of the slot 4 is chosen such that the depth is smaller than one half of a dimension of the base body 2 in the radial direction R.
• the lip seal B is thereby minimally yielding, preferably in the range of a few tenths of a millimeter.
• a sliding bearing surface 5 is provided on the inwardly directed side. At the edge of the sliding bearing surface 5, two relatively large chamfers 51, 52 are formed.
• X-X denotes an axial direction of the sealing ring.
• openings 6 are formed in the pressure ring 1, which extend in the axial direction X-X through the base body 2.
• the openings 6 are arranged radially outside a radial end of the slot 4.
• the openings 6 are adapted to receive a pin, which prevents the sealing ring 1 together with a rotating member 20, which in this embodiment is a shaft rotates.
• the pins arranged in the openings 6 thus form an anti-twist device, wherein in the region of the opening 6 the base body 2 has offset first and second large chamfers or depressions 7, 8 on both sides of the opening 6.
• the sealing ring 1 seals on the rotating component 20 in such a way that only the lip seal 3 is in contact K with the rotating component 20.
• a gap width in the radial direction R is approximately 0.1 mm in this case. In ideal operation, no wave deflections in the radial direction R would result, so that the annular gap 21 would be present at all times. However, in practice, especially when used in stirrers, radial shaft deflections occur, so that the shaft can come into contact with the sliding bearing surface 5.
• the gap 21 is relatively small, a secure seal is ensured by the always applied to the surface of the rotating member lip seal in any operating situation, ie, even with a contact between the rotating member 20 and the slide bearing surface 5.
• the lip seal in this case has a self-biasing F, which is directed in the direction of the base body 2 and the lip seal 3 tracks during movements of the rotating member 20.
• the one-piece sealing ring 1 is made of PTFE with a glass fiber content of 15%.
• the lip seal 3 is preferably already brought into the curved shape shown in FIGS. 1 to 3, for example by being mounted on a mandrel, as a result of which the sealing lip 3 has an improved inherent prestressing F. Furthermore, the thus prestressed lip seal 3 always ensures the best possible centering of the rotating component.
• Fig. 4 shows the use of a sealing ring 1 shown in FIGS. 1 to 3 in an assembly 10 with a housing 17.
• the housing 17 includes a sectionally L-shaped receptacle 1 1, which engages over the sealing ring 1 in the axial direction, and a disc 12.
• the sealing ring 1 is received in the L-shaped receptacle 11 and thus arranged between the receptacle 11 and the disc 12.
• the assembly comprises a secondary sealing element 14, in particular an O-ring, which is arranged between the receptacle 1 1 and the sealing ring 1.
• the O-ring provides a seal between the receptacle 11 and the sealing ring 1 and a bias of the sealing ring 1 in the axial direction in the direction of the disc 12 ready.
• a pin 13 is fixed in the receptacle 11, wherein the pin 13 with radial clearance 15, 16 is received in the opening 6 in the sealing ring 1. Since four openings 6 are provided in the sealing ring 1 in this embodiment, four pins 13 are provided accordingly.
• the pins 13 thus serve as anti-rotation, but allow that the sealing ring 1 can join in the radial direction R movements. Thus, damage to the sealing ring 1 can be avoided, in particular in the case of radial deflections of the rotating component.
• the assembly 10 can be preassembled and thus arranged as a completely pre-assembled assembly on a rotating component.
• Fig. 5 shows a sealing ring 1 according to a second embodiment.
• the sealing ring 1 according to a second embodiment.
• the sliding bearing ring 30 has a sliding surface 31, which faces the outside of the rotating component 20.
• the sliding bearing ring 30 is in a base body
• annular recess 22 As in the first embodiment, a gap 21 between the sliding surface 31 and the rotating member 20 is again provided. The lip seal 3 is again in a sealing manner against the rotating component 20.
• Fig. 6 shows a cartridge assembly 40 in which four sealing rings 1 according to the invention are arranged in series.
• a shaft sleeve 23 is disposed on a shaft and forms together with the shaft, the rotating member 20.
• the cartridge assembly 40 further comprises a multi-part cartridge housing 42, a roller bearing 41 and a plurality of non-designated sealing elements in the form of O-rings or the like.
• the cartridge assembly 40 a shaft passage for a stirrer, wherein the sealing rings 1 seal an inside of the agitator from an outside.
• the orientation of the sealing rings 1 on the shaft sleeve 23 is not the same.
• a sealing ring (in the view of FIG.
• the cartridge assembly 40 further comprises a first and a second fluid feed 43, 44.
• a barrier fluid in a barrier fluid space between adjacent sealing rings 1 are supplied.

Landscapes

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

Priority Applications (4)

Applications Claiming Priority (2)

Publications (2)

Family

ID=49486429

Family Applications (1)

Country Status (6)

Cited By (1)

Citations (1)

Family Cites Families (12)

• 2012
  • 2012-09-20 DE DE102012018652.5A patent/DE102012018652B4/de active Active
• 2013
  • 2013-09-16 WO PCT/EP2013/002776 patent/WO2014044376A2/de not_active Ceased
  • 2013-09-16 EP EP13782957.8A patent/EP2898231B1/de active Active
  • 2013-09-16 CN CN201380049257.XA patent/CN104662315B/zh active Active
  • 2013-09-16 IN IN1956DEN2015 patent/IN2015DN01956A/en unknown
  • 2013-09-16 ES ES13782957T patent/ES2769456T3/es active Active

Patent Citations (1)

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