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
  • F16J15/44—Free-space packings
  • F16J15/441—Free-space packings with floating 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
  • F16J15/164—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
  • F16J15/44—Free-space packings
  • F16J15/445—Free-space packings with means for adjusting the clearance

Definitions

• the invention relates to an arrangement for sealing a gap between a first component and a second component, wherein between a sealing surface of the first component and a sealing surface of the second component, a sealing element is arranged. Furthermore, the invention relates to a use of the arrangement in a turbomachine.
• Turbomachine Hydraulic turbines, steam and gas turbines, wind turbines, centrifugal pumps, centrifugal compressors and propellers are all collectively referred to as “turbomachine" and all share the same purpose with the purpose of extracting energy from one fluid to drive another, or vice versa
• fluid should be understood to mean both liquids and gases that can carry out flowing movements.
• thermal turbomachinery shaft seals are sealed by the housing and the inner sealing points of the machine usually by means of labyrinth seals.
• labyrinth seals are sealed by the housing and the inner sealing points of the machine usually by means of labyrinth seals.
• flammable, toxic or expensive gases require a completely gastight seal against the environment, which can not be achieved with the labyrinth seals.
• the seal is made by a liquid film between a shaft and the bore of sealing rings, which are secured against rotation, but can move in the radial direction, so that they can follow the displacements of the shaft relative to the housing.
• the barrier liquid is fed between two rings and exits the gas and the atmosphere side.
• barrier liquids are primarily oils and water in question.
• seals in which a sealing effect is achieved by means of sealing gas. For a good sealing effect high barrier gas consumption may be accepted. Furthermore, seals are known in which a contact between the stator and the rotor takes place. Known here are the so-called brush seals whose sealing effect is given even with varying gap widths.
• the object of the invention is to provide an arrangement for sealing a gap between a first component and a second component, in which the gap for all operating conditions is as low as possible.
• the object is achieved by an arrangement for sealing a gap between a first component and a second Component, wherein between a sealing surface of the first component and a sealing surface of the second component, a sealing element is arranged, wherein means are provided which are designed to move the sealing element to the first component, wherein the sealing surface of the second component as a guide surface for the sealing element during movement is arranged towards the first component, wherein the means comprises a movable pressure element which is designed such that its displacement leads to a displacement of the sealing element, wherein the pressure element has a first relative to a movement device of the sealing element inclined surface, which on a second inclined surface the sealing element is applied, wherein the pressure element is arranged by means of a spring having a screw for resilient mounting of the pressure element on the second component.
• the advantage of the invention is that the gap between the first component and the second component can be kept substantially constant over a wide temperature range. As temperatures increase, the first component and the second component often expand to different extents. A widening gap would be the result.
• a sealing element is used, whereby the gap is reduced again by a displacement of a sealing element.
• One advantage is, inter alia, that a thermal expansion occurring in a radial direction is converted into an axial movement.
• a movement of the first component due to temperature expansion in this case leads to a movement of the movable pressure element.
• the movement here is such that it leads to a movement or displacement of the sealing element in the direction of the gap.
• This provides an easy way to implement movements in one direction into a movement in another direction via suitable surfaces and a certain sliding friction.
• the direction of movement of the pressure element is substantially perpendicular to the direction of movement of the sealing element.
• the first component is designed as a rotationally symmetrical rotor rotatably mounted about a rotation axis and the second component as a rotationally symmetrical design around the rotation axis.
• the arrangement for sealing the gap is just suitable for a gap between a rotor and a stator.
• the sealing element is formed from a plurality of individual sealing elements arranged around the rotor.
• the pressure element is designed in the form of a ring around the rotor.
• This arrangement is suitable for rotors where a ring around the rotor can be easily mounted.
• the pressure element is formed in at least two partial rings.
• This arrangement is suitable for turbomachines, in which not easily a ring can be mounted around the rotor. By dividing the overall ring in at least two partial rings they can be easily mounted.
• the pressure element and the sealing element each have a conical surface, which are formed such that a displacement of the pressure element causes a displacement of the sealing element.
• stator and the sealing element one of the above-mentioned conical surface, for. B. opposite another conical surface which is formed such that a displacement of the sealing element causes a concern to the stator.
• Figure 1 shows a section through an arrangement for sealing a gap
• Figure 2 is a side view of the arrangement.
• FIG. 1 shows a section through an arrangement for sealing a gap 2. Between a sealing surface 3 of a first component 4 and a sealing surface 5 of a second component 6, a sealing element 7 is arranged.
• a pressure element 8 is resiliently mounted on the second component 6 via a screw 9 and a spring 10.
• the spring 10 causes a force in a first direction of movement 11.
• a movement of the pressure element 8 would exert an additional force on the sealing element 7 via an inclined surface 12.
• Thieves- Movement of the pressure element 8 would eventually lead to a displacement of the sealing element 7 in a further direction of movement 13.
• a further inclined surface is arranged between the second component 6 and the sealing element 7.
• suitable angles for the first inclined surface and the further inclined surface 14 there is a non-tilting movement of the sealing element 7 in the direction of the gap 2.
• the spring force of the spring 10, the first inclined surface 12 and the other inclined surface 14 is selected such that the smallest possible gap 2 is formed.
• the second component 6 expands in an expansion direction 15. In a rigid or fixed arrangement of the sealing element 7 on the second component 6, this would lead to an enlargement of the gap 2.
• a movement of the second component 6 in the expansion direction 15 leads to a movement of the Druckele- element 8 due to the spring force of the spring 10 in the first direction of movement 11.
• This displacement of the pressure element 8 is such that its displacement to a displacement of the sealing element 7 in the direction 13 leads.
• the first movement direction 12 and the direction 13 are in this case substantially perpendicular to each other.
• the first component 4 can be designed as a rotationally symmetrical rotor 17 rotatably mounted about a rotation axis 16.
• the second component 6 may be as a rotationally symmetrical about the rotation axis 16 formed stator 18.
• the gap 2 can be influenced by selecting suitable materials for the sealing element 7, the pressure element 8 and the second component.
• the size of the gap 2 is thus dependent on the prevailing operating conditions.
• FIG. 2 shows a side view of the arrangement for sealing a gap between a rotor and a stator.
• the pressure element is designed in the form of a ring around the rotor 17.
• An embodiment of the pressure element 8 is also conceivable in the form of two partial rings.
• the sealing element 7 is divided in the embodiment shown in Figure 2 into a plurality, a total of eight individual sealing elements 7.
• the pressure element 8 and the sealing element 7 are formed such that they each have a conical surface, wherein a displacement of the pressure element 8 causes a displacement of the sealing element 7.
• this embodiment of the stator 18 and the sealing element 7 has a further conical surface, which is designed such that a displacement of the sealing element 7 causes a contact with the stator 18.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
• Turbine Rotor Nozzle Sealing (AREA)
• Structures Of Non-Positive Displacement Pumps (AREA)
• Seal Device For Vehicle (AREA)
• Installation Of Indoor Wiring (AREA)
• Sealing With Elastic Sealing Lips (AREA)
• Credit Cards Or The Like (AREA)
• Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)

Priority Applications (1)

Applications Claiming Priority (3)

Publications (1)

Family

ID=34927991

Family Applications (2)

Family Applications Before (1)

Country Status (9)

Families Citing this family (18)

Family Cites Families (16)

• 2004
  • 2004-12-23 PL PL04030733T patent/PL1674771T3/pl unknown
  • 2004-12-23 EP EP04030733A patent/EP1674771B1/fr not_active Not-in-force
  • 2004-12-23 ES ES04030733T patent/ES2344059T3/es active Active
  • 2004-12-23 AT AT04030733T patent/ATE467784T1/de active
  • 2004-12-23 DE DE502004011161T patent/DE502004011161D1/de active Active
• 2005
  • 2005-09-30 US US11/793,859 patent/US7997858B2/en not_active Expired - Fee Related
  • 2005-09-30 JP JP2007547403A patent/JP4833222B2/ja not_active Expired - Fee Related
  • 2005-09-30 WO PCT/EP2005/054952 patent/WO2006069817A1/fr active Application Filing
  • 2005-09-30 CN CN2005800446859A patent/CN101087969B/zh not_active Expired - Fee Related
  • 2005-09-30 EP EP05789503A patent/EP1828648A1/fr not_active Withdrawn

Non-Patent Citations (1)

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