EP3327257A1 - Ensemble d'aube directrice pourvu de dispositif de compensation - Google Patents

Ensemble d'aube directrice pourvu de dispositif de compensation Download PDF

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Publication number
EP3327257A1
EP3327257A1 EP17202362.4A EP17202362A EP3327257A1 EP 3327257 A1 EP3327257 A1 EP 3327257A1 EP 17202362 A EP17202362 A EP 17202362A EP 3327257 A1 EP3327257 A1 EP 3327257A1
Authority
EP
European Patent Office
Prior art keywords
adjusting
compensating
housing
vane assembly
adjusting element
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.)
Withdrawn
Application number
EP17202362.4A
Other languages
German (de)
English (en)
Inventor
Sabrina Schmidtke
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.)
Rolls Royce Deutschland Ltd and Co KG
Original Assignee
Rolls Royce Deutschland Ltd and 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 Rolls Royce Deutschland Ltd and Co KG filed Critical Rolls Royce Deutschland Ltd and Co KG
Publication of EP3327257A1 publication Critical patent/EP3327257A1/fr
Withdrawn legal-status Critical Current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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/16—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes
    • F01D17/162—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of nozzle vanes for axial flow, i.e. the vanes turning around axes which are essentially perpendicular to the rotor centre line
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D17/00—Regulating or controlling by varying flow
    • F01D17/10—Final actuators
    • F01D17/12—Final actuators arranged in stator parts
    • F01D17/14—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits
    • F01D17/141—Final actuators arranged in stator parts varying effective cross-sectional area of nozzles or guide conduits by means of shiftable members or valves obturating part of the flow path
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
    • F01D9/00—Stators
    • F01D9/02—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles
    • F01D9/04—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector
    • F01D9/041—Nozzles; Nozzle boxes; Stator blades; Guide conduits, e.g. individual nozzles forming ring or sector using blades
    • 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
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/52—Casings; Connections of working fluid for axial pumps
    • F04D29/54—Fluid-guiding means, e.g. diffusers
    • F04D29/56—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/563—Fluid-guiding means, e.g. diffusers adjustable specially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/32—Application in turbines in gas turbines
    • F05D2220/323—Application in turbines in gas turbines for aircraft propulsion, e.g. jet engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2220/00—Application
    • F05D2220/30—Application in turbines
    • F05D2220/36—Application in turbines specially adapted for the fan of turbofan engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2230/00—Manufacture
    • F05D2230/60—Assembly methods
    • F05D2230/64—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins
    • F05D2230/642—Assembly methods using positioning or alignment devices for aligning or centring, e.g. pins using maintaining alignment while permitting differential dilatation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/10—Stators
    • F05D2240/12—Fluid guiding means, e.g. vanes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00—Components
    • F05D2240/80—Platforms for stationary or moving blades
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/30—Retaining components in desired mutual position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2260/00—Function
    • F05D2260/50—Kinematic linkage, i.e. transmission of position
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/10—Metals, alloys or intermetallic compounds
    • F05D2300/17—Alloys
    • F05D2300/174—Titanium alloys, e.g. TiAl

Definitions

  • the invention particularly relates to a stator blade assembly according to the preamble of claim 1.
  • adjustable vanes in turbines, for example turbomachinery and, in particular, gas turbine engines for influencing the flow as a function of the rotational speed of rotating blades.
  • gas turbine engines in particular adjustable guide vanes are usually used in the region of the compressor, wherein the guide vanes are adjusted in dependence on the compressor speed.
  • the adjustable vanes are referred to here in the English jargon as variable stator vanes short "VSV".
  • the adjustable guide vanes are usually part of a row of vanes and arranged within a housing in which the rotating blades are arranged.
  • the individual vanes are mounted in practice in each case via a bearing pin adjustable on the housing.
  • a bearing pin adjustable on the housing.
  • Within the housing is usually a rotatable mounting of a vane on a hub, such as a compressor, is provided.
  • each bearing pin is rotatably mounted in an associated bearing opening in the wall of the housing. In this case, the bearing pin passes through this bearing opening along an extension direction of the journal, so that one end of the journal is accessible on an outer side of the housing in order to adjust by rotation of the journal, the corresponding guide vane can.
  • each lever engages a pin end, which is attached to an adjusting element in the form of an adjusting ring of an adjusting mechanism in order to simultaneously adjust a plurality of guide vanes by adjusting the adjusting element and a plurality of lever hinged thereto.
  • a generic vane assembly with adjustable vanes for a compressor of a gas turbine engine shows, for example, the US 9,309,778 B2 .
  • the journals of the vanes which are often referred to as spindles, are provided in practice in radially projecting, sleeve-shaped bearing extensions of the housing. These bearing extensions are formed on a wall of the housing and ensure the rotatable mounting and support of the journals.
  • the at least one adjusting element of the adjusting device provided for the adjustment of the vanes is usually supported on an outer side of the housing and is relative thereto circumferentially adjustable to cause rotation of the vanes about their respective axis of rotation.
  • a compensation device is in this case provided primarily to avoid the operation of an engine in which the housing, depending on the cycle, heated more than the adjustment, to avoid that the housing displaces the adjustment radially outward and thereby the Verstellgenaumaschinetechnik the adjustment is reduced or even a deformation or jamming of the adjustment occurs.
  • a radial distance of the adjusting element to the outside of the housing is predetermined and different thermal expansions of the adjusting element on the one hand and of the housing on the other hand are compensated in order to hold the adjusting element in a defined position relative to the housing, e.g. to keep centered an annular adjustment with respect to the housing.
  • a plurality of compensation devices are arranged distributed along the circumferential direction in order to support the adjustment element at different locations against the housing and to center it.
  • a compensating device with a spacer which is held in a compensating element in the form of a socket.
  • This socket has a higher coefficient of thermal expansion than the adjusting element and its spacer over which the adjusting element can be supported on an outer side of the housing.
  • the assembly of the balancing device is relatively expensive.
  • the spacer has to be positioned almost exactly relative to the bushing and the adjusting element in order to achieve the desired compensation.
  • the bush is inserted into a through hole of the adjusting element, so that in the design of the individual components of the compensating device must be considered in particular consuming, which heat transfer results between the adjustment and the socket placed therein.
  • the invention is therefore based on the object, starting from the aforementioned prior art to provide an improved guide vane assembly.
  • the compensation device of the guide vane assembly hereby has a compensation element arranged between the adjustment element and the outside of the housing, which compensation element is connected to the adjustment element via at least one connection element of the compensation device articulated on the adjustment element.
  • the compensating element which defines a contact surface for the system on the outside of the housing, is mounted in such an embodiment on the connecting element on the adjusting element that upon thermal expansion of the compensating element, a radial displacement of the contact surface with respect to the adjusting element occurs.
  • This temperature-dependent occurring radial displacement can be compared to the adjusting larger, temperature-related radial expansion compensate, so cause a radial distance of the compensating element to the outside of the housing is substantially maintained and even when heating the vane assembly a defined (modified) radial distance between the adjusting element and the housing via which a predetermined relative position of Adjustment is maintained to the housing - for example, the adjustment remains centered to the housing.
  • an increase in temperature thus leads to a greater expansion of the compensating element than the connecting element, via which the compensating element is connected to the adjusting element.
  • This can e.g. be achieved in that the compensation element has a higher thermal expansion coefficient than the at least one connecting element.
  • the connecting element and the compensating element are made of a material with (largely) identical coefficients of thermal expansion or of the same material, it can be provided in a variant that the at least one compensating element, due to its dimensions and arrangement close to the housing (in comparison to the connecting element) during operation of the engine experiences a relation to the connecting element stronger temperature-induced heating than the connecting element.
  • the connecting element is shorter and / or narrower than the compensating element, so that a temperature change in the environment of the housing on the connecting element has less influence with respect to a changing extent than on the compensating element.
  • the at least one connecting element is likewise articulated on the compensating element.
  • the at least one connecting element may be designed like a lever and hinged to the adjusting element with a lever end. In a lever-like configuration of the at least one connecting element, a lever end of the connecting element may be articulated on the adjusting element and another lever element of the connecting element may be articulated on the compensating element.
  • the compensating element is coupled to the at least one connecting element and connected thereto with the adjusting element that changes in a temperature-induced expansion of the compensating element along the circumferential direction, a radial distance between the compensating element and the adjusting element. For example, at an elongation of the Compensating elements (thermal expansion) reduce the radial distance and at a temperature-induced shrinkage (thermal contraction) increase the radial distance.
  • the compensating element can be configured geometrically differently. In one embodiment, it is elongated and has a longitudinal extent along the circumferential direction. In this context, for example, be provided that the compensation element is rod-shaped.
  • the compensating element can be connected to the adjusting element via a single connecting element, which is articulated on the adjusting element, while it is fixed rigidly to the adjusting element, for example via a further component, at another point.
  • at least two connecting elements for the connection of the compensating element with the adjusting element are provided on the other hand, which are hinged to along the circumferential direction spaced locations on the adjusting element.
  • the compensating element is accordingly mounted here via at least two connecting elements on the adjusting element of the adjusting device, so that pivotal movements of the connecting elements are caused by a thermal expansion of the compensating element, which in turn lead to a radial displacement of the compensating element.
  • the articulation of the two connecting elements and their connection to the compensating element is in this case, for example, such that upon thermal expansion of the compensating element, the two connecting elements are pivoted about different pivot axis on the adjusting element, in mutually opposite pivot directions (preferably substantially parallel course of the two pivot axes ).
  • the at least two connecting elements are connected to the adjusting element and the compensating element such that a section of the adjusting element, on which two connecting elements (the at least two connecting elements) are articulated, these two connecting elements and the compensating element Viewed along the central axis, extending along edges of a virtual trapezoid contour.
  • the abovementioned sections and elements are thus arranged trapezoidally in a view along the central axis.
  • the compensation element then extends along a base of the virtual trapezoid contour and the two connection elements extend along two legs of the virtual one Trapezoidal contour.
  • the Verstellelementabites on which the two connecting elements are articulated defines the opposite to the base shorter base side of the virtual trapezoidal contour, which is parallel to the base and which is connected via the two legs extending thereto angled to the base.
  • the trapezoid contour is compressed by articulation of the connecting elements on the adjusting element on the one hand and on the compensating element on the other hand due to thermal expansion of the compensating element, which optionally rests on the outside of the housing, and consequently reduces a radial distance of the compensating element to the adjusting element.
  • This changed radial distance between the adjusting element and the compensating element essentially compensates for a radial thermal expansion of the housing in the direction of the temperature-related likewise, but less radially outwardly expanding adjusting element, so that the relative position of the compensating element remains substantially unchanged to the outside of the housing, even if due to temperature, the housing and the adjustment vary greatly.
  • the virtual trapezoidal contour along which, in particular, the two connecting elements and the compensating element extend in a variant embodiment may correspond to the contour of an isosceles trapezium.
  • the two connecting elements thus extend - as legs of the trapezoid contour - with an identical effective length between two connection points on the adjusting element on the one hand and the compensating element on the other hand and extend to the compensating element under identical inner angles.
  • the compensation element is connected via four connecting elements with the adjusting element, which are each hinged to the adjusting element and are arranged in pairs opposite one another on two sides of the adjusting element, which are facing away from each other with respect to the central axis.
  • a first pair of connecting elements is located at a first end of the compensating element, while another, second pair of connecting elements is located at a circumferentially spaced end of the compensating element.
  • the two connecting elements of a pair of connecting elements are then arranged, for example, on the adjusting element opposite one another on two facing away from each other (axial front and rear) end faces of a rectangular or circular adjustment in cross-section.
  • the above-described embodiment is independent of a cross-sectional shape of the compensating element or the adjusting element.
  • the adjusting element may in principle be e.g. tubular or sleeve-shaped or formed as a solid shaft and / or have a rectangular or circular cross-section.
  • the adjusting element can be supported on the outside of the housing via the compensating device and in particular the compensating element of the compensating device.
  • the compensating device and in particular the compensating element of the compensating device.
  • a plurality of compensating devices spaced apart from one another along the circumferential direction and coupled in each case with the adjusting element can be provided.
  • these can in particular serve for centering the adjustment element with respect to the housing on which the guide vanes are adjustably mounted.
  • balancing devices in each of which at least one hinged to the adjusting element and a compensation element (eg with compared to the at least one connecting element higher coefficient of thermal expansion) are provided, can at a different temperature thermal expansion of the adjusting element on the one hand and the housing on the other hand be achieved that the connecting element remains centered with respect to the housing.
  • Adjustability of the guide vanes by means of the adjusting element and in particular an adjustment accuracy which can be achieved by the adjusting device is thus not or not appreciably impaired by the different thermal expansions (with the same temperature change).
  • At least one separate sliding element is attached to the compensating element, which has a sliding surface for engagement on the outside of the housing.
  • a friction-reduced contact of the compensating element with the housing is provided via the sliding surface of the sliding element, so that the compensating element can slide against the housing via the sliding element.
  • the compensating element is displaceable relative to the housing at a temperature-induced expansion of the compensating element and / or an adjustment of the adjusting element, overcoming a comparatively low static friction (in relation to a direct contact of the compensating element itself on the housing).
  • the at least one separate sliding element with a fixing section is inserted into a bore of the compensating element.
  • Such a fixing section for the connection of the sliding element with the compensating element has, for example, means for the positive and non-positive fixing in the bore of the compensating element.
  • radially projecting latching webs or latching blades are provided on the fixing section of the sliding element for this purpose. In this way, the sliding element can be easily inserted with its fixing portion in the bore of the compensating element and is locked automatically captive here by plugging.
  • the adjusting element may be formed as a one-piece or multi-part adjusting ring and / or ringsegment- or ring-shaped.
  • an adjusting element for a guide vane assembly by means of which the guide vanes are rotatable about their radial axis of rotation, to have a one-piece or multi-part adjusting element in the form of an adjusting ring which extends circumferentially and is displaceable on the housing.
  • Such an adjusting ring can be centered in a variant of a guide vane assembly according to the invention over at least one compensating device or more distributed along the circumference arranged compensating means respect to the housing and be kept centered with respect to a temperature increase with respect to the housing.
  • the compensation element is at least partially made of magnesium, respectively, the compensation element has magnesium as a manufacturing material.
  • the at least one connecting element can be produced at least partially from titanium, in particular a titanium alloy, respectively, and the connecting element has at least partially titanium, in particular a titanium alloy, as the production material.
  • an engine in particular a gas turbine engine, with at least one guide vane assembly according to the invention can be provided which allows improved compensation temperature occurring and different thermal expansions of an adjusting element for the adjustment of vanes on the one hand and a housing for the storage of the vanes on the other.
  • FIG. 5 illustrates schematically and in section a (gas turbine) engine T, in which the individual engine components along a central axis or axis of rotation M are arranged one behind the other.
  • a fan F At an inlet or Intake E of the engine T is sucked air along an inlet direction E by means of a fan F.
  • This fan F is driven by a shaft that is rotated by a turbine TT.
  • the turbine TT adjoins a compressor V, which has, for example, a low-pressure compressor 11 and a high-pressure compressor 12, and possibly also a medium-pressure compressor.
  • the fan F supplies air to the compressor V and, on the other hand, a bypass channel B for generating the thrust.
  • the air conveyed via the compressor V finally passes into a combustion chamber section BK in which the drive energy for driving the turbine TT is generated.
  • the turbine TT has a high-pressure turbine 13, a medium-pressure turbine 14 and a low-pressure turbine 15.
  • the turbine TT activates the fan F via the energy released during combustion, in order to then generate the required thrust via the air conveyed into the bypass duct B.
  • the air in this case leaves the bypass passage B in the region of an outlet A at the end of the engine T, at which the exhaust gases flow out of the turbine TT to the outside.
  • the outlet A in this case usually has a discharge nozzle.
  • the compressor V comprises a plurality of axially consecutive rows of blades 110 and intermediate rows of vanes 111 in the region of the low pressure compressor 11.
  • the rotating about the central axis M rows of blades 110 and the rows of stationary vanes 111 are arranged alternately along the central axis M and received in a (compressor) housing 1 of the compressor V.
  • the individual guide vanes 111 are adjustably mounted on the one- or multi-part housing 1 - usually in addition to a radially inner bearing on the hub of the compressor V.
  • FIG. 4 shows here in detail in greater detail a known from the prior art arrangement of blade rows 12a to 12d and rows of blades 13a to 13c for the low pressure compressor 11.
  • the vanes 111 of the successively arranged rows of guide blades 13a, 13b and 13c are adjustably mounted on the housing 1 to be able to change the position of the vanes 111 in dependence on the compressor speed.
  • a journal 111a of each blade 111 is rotatably mounted in a bearing opening, which is formed by a sleeve-shaped and radially outwardly projecting bearing extension 10 of the housing 1.
  • Each journal 111a is rotatably supported and supported in an associated bearing extension 10 about a rotation axis D.
  • each journal 111a passes through its associated bearing extension 10, so that on the outside of the housing 1, a journal end 111b protrudes from the bearing extension 10.
  • An adjusting lever 31 of an adjusting device 3 can thus act on the individual pin ends 111b in order to rotate the bearing pin 111a and thus to be able to change the position of the associated guide blade 111 of a stator blade group.
  • the levers 31 of a row of guide vanes 13a, 13b or 13c are each articulated to an adjusting element in the form of an adjusting ring 30 of the adjusting device 3.
  • the often multi-part, divided into at least two segments - adjusting ring 30 extends circumferentially along the outer surface of the housing 1.
  • An adjusting ring 30 is supported on an outer side of the housing 1, for example, on a peripherally rotating contact surface 114.
  • the adjusting ring 30 is here in the radial direction to the outside of the housing 1 and in the present case to the contact surface 114 by a radial distance a spaced.
  • This radial distance a is predetermined over a plurality of distributing devices arranged distributed along the circumference, via which the adjusting ring 30 is supported on the outside of the housing 1 and should keep the adjusting ring 30 centered with respect to the housing 1.
  • the solution according to the invention is intended to remedy the situation, to which a possible embodiment based on the Figures 1A to 1D . 2A to 2B and 3A to 3B is illustrated in more detail.
  • a compensation device 4 is provided with an elongated, rod-shaped compensation element 40.
  • a compensation element 40 On the compensating device 4 different thermal expansion of the adjusting ring 30 on the one hand and the housing 1 on the other compensated by a compensation element 40 is provided which is connected via a plurality of hinged to the adjusting ring 30 connecting lever 41 - 44 (with lower coefficient of thermal expansion) with the adjusting ring 30 such that the compensating element 40 can displace radially relative to the adjusting ring 30 due to an expansion (thermal expansion or contraction) occurring due to temperature.
  • the compensation element 40 designed in the present case in the manner of a (flat) rod has a higher coefficient of thermal expansion than the connecting levers 41-44, via which the compensation element 40 is held radially displaceable on the adjusting ring 30 between the adjusting ring 30 and the outside of the housing 1. Furthermore, the temperature compensation is assisted in that the connecting levers 41-44 are shorter and narrower than the compensating element 40 and the compensating element 40 is arranged closer to the housing 1 (in comparison to the connecting levers 41-44). During operation of the engine T, the temperature-related expansion has less influence on the connecting levers 41-44 than on the compensating element 40.
  • Each of the present four connecting levers 41-44 is articulated at one end of the lever via a first articulated connection 413, 423, 433 or 443 on the adjusting ring 30 and at its other end of the lever via a second articulated connection 410, 420, 430 or 440 on the compensating element 40th Die Connecting levers 41-44 are arranged in pairs opposite each other on the two end faces 30A and 30B of the adjusting ring and hold the compensating element 40 radially to a lower side 30C of the adjusting ring 30 facing one of the outside of the housing 1 and between the adjusting ring 30 and the outer side of the housing 1 radially displaceable.
  • connection levers 40-44 to the compensating element 40 are in each case in the region of a longitudinal end of the longitudinally extending compensating element 4.
  • the connecting levers 41-44 are arranged on mutually remote first and second end faces 30A and 30B of the square cross-section adjusting ring 30 here ,
  • the first end face 30A forms in the intended mounted state of a particular the adjusting ring 30 and the compensating device 4 comprehensive Leitschaufelbauuite L a front end face, while the second end face 30B forms a rear or rear end face of the adjusting ring 30.
  • the adjusting ring 3 can be supported via the compensating element 40 against the housing 1.
  • the compensation element can rest with a lower side on the contact surface 114 of the housing 1, as shown by the perspective views of FIGS. 2A and 2 B is illustrated.
  • the compensating element 4 extends together with two connecting levers 41, 42 or 43, 44 articulated on the first or second end side 30A or 30B and a portion of the adjusting ring 3 on which the first articulated connections 413, 423 (FIGS. 433, 443) are defined along a virtual trapezoid contour TF.
  • the compensation element 40 extends in the circumferential direction U on a longer base side or base of this trapezoidal contour TF, while the two mutually facing connecting lever 41, 42 or 43, 44 of an end face 30A or 30B extend along two legs of this trapezoidal contour TF.
  • the shorter base side of the trapezoidal contour TF is formed by a portion of the adjusting ring 30.
  • the compensating element 40 displaces relative to the underside 30C of the adjusting ring 30 when there is a temperature-related thermal expansion and thus a radial distance b (see FIG Figure 1C ) of the compensating element 40 to the underside 30C of the adjusting ring 30 due to a thermal expansion of the compensating element 40 can change.
  • the compensating element 40 expands, for example, along the circumferential direction U, the mutually facing connecting levers 41, 42 and 43, 44 of an end side 30A or 30B pivot in mutually opposite pivoting directions, since the lever ends connected to the compensating element 40 are further spaced from each other.
  • the virtual trapezoid contour TF is thus compressed.
  • the compensation element 40 approaches the bottom 30 C of the adjusting ring 30 at.
  • the connecting levers 41, 42 or 43, 44 associated with an end face 30A or 30B pivot towards each other with their ends connected to the compensating element 40.
  • the virtual trapezoid contour TF is stretched.
  • the compensation element 40 thus shifts away from the underside 30C of the adjusting ring 30 radially inward.
  • the compensation device 4 compensates for a temperature-caused expansion of the housing 1 radially outward with respect to the weaker temperature-induced radially outwardly expanding adjusting ring 30 and maintains a radial distance of the compensating element 40 to the contact surface 114 of the housing 1 substantially upright.
  • the adjusting ring 3 Due to the temperature-induced radial displacement of the compensating element 40 relative to the adjusting ring 3, the case is ensured that the adjusting ring 3 is not or at most slightly locally displaced locally by the radially outwardly expanding housing 1. Instead, the adjusting ring 30 is held centered to the housing 1.
  • a sliding element 5 is designed in the manner of a stopper and inserted into bores 401 of the compensation element 40 spaced apart along the circumferential direction U, so that a disk-shaped head forming a sliding or contact surface 50 protrudes from the respective bore 401 on the underside of the compensation element 40.
  • each slider 5 is in this case inserted via a fixing portion 51 in the respective bore 401 of the compensating element 4 and fixed therein via radially to a longitudinal axis of the pin projecting louvres 510 in the respective bore 401.
  • a corresponding sliding / contact surface 50 on the underside of the compensating element 40 can of course also be formed via a sliding element which is fixed to the compensating element 40, for example by gluing.
  • compensating means 4 for example, at least three along the circumferential direction U offset by 120 ° to each other, four offset by 90 ° to each other or five by 72 ° to each other offset compensating means 4 provided on the adjusting ring 30. In principle, however, a different number along the circumferential direction U distributed on the adjusting ring 30 arranged compensating means 4 may be provided.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP17202362.4A 2016-11-23 2017-11-17 Ensemble d'aube directrice pourvu de dispositif de compensation Withdrawn EP3327257A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102016122639.4A DE102016122639A1 (de) 2016-11-23 2016-11-23 Leitschaufelbaugruppe mit Ausgleichseinrichtung

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EP3327257A1 true EP3327257A1 (fr) 2018-05-30

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EP17202362.4A Withdrawn EP3327257A1 (fr) 2016-11-23 2017-11-17 Ensemble d'aube directrice pourvu de dispositif de compensation

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US (1) US10495107B2 (fr)
EP (1) EP3327257A1 (fr)
DE (1) DE102016122639A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE1026816B1 (fr) * 2018-11-29 2020-07-01 Safran Aero Boosters Sa Système de calage variable d’aubes d’un étage statorique d’un compresseur d’une turbomachine d’aéronef

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841788A (en) * 1972-10-28 1974-10-15 J Sljusarev Device for turning the stator vanes of turbo-machines
US20060133925A1 (en) * 2004-12-16 2006-06-22 Snecma Stator vane stage actuated by an automatically-centering rotary actuator ring
FR3024996A1 (fr) * 2014-08-22 2016-02-26 Snecma Anneau de commande d'un etage d'aubes a calage variable pour une turbomachine

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2206381B (en) * 1987-06-30 1991-10-09 Rolls Royce Plc A variable stator vane arrangement for a compressor
DE19516382A1 (de) * 1995-05-04 1996-11-07 Deutsche Forsch Luft Raumfahrt Verstellring
GB0326544D0 (en) * 2003-11-14 2003-12-17 Rolls Royce Plc Variable stator vane arrangement for a compressor
WO2012092543A1 (fr) 2010-12-30 2012-07-05 Rolls-Royce North America Technologies, Inc. Aube variable pour moteur à turbine à gaz
DE102014219552A1 (de) 2014-09-26 2016-03-31 Rolls-Royce Deutschland Ltd & Co Kg Leitschaufelverstellvorrichtung einer Gasturbine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3841788A (en) * 1972-10-28 1974-10-15 J Sljusarev Device for turning the stator vanes of turbo-machines
US20060133925A1 (en) * 2004-12-16 2006-06-22 Snecma Stator vane stage actuated by an automatically-centering rotary actuator ring
FR3024996A1 (fr) * 2014-08-22 2016-02-26 Snecma Anneau de commande d'un etage d'aubes a calage variable pour une turbomachine

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US20180142705A1 (en) 2018-05-24
DE102016122639A1 (de) 2018-05-24
US10495107B2 (en) 2019-12-03

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