• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The subject of the invention is a shutter (100) for a fixing orifice (22) for a turbomachine stator blade, said blade having a blade integral with a foot provided with fixing orifices, said shutter (100 ) being characterized in that it comprises: a cup (110) adapted to be secured in said fixing orifice (22) of a stator vane; a plug (120) of cylindrical shape cooperating with said cup, said plug (120) having an upper face (124) having an inclination relative to the laying plane of said plug (120); guide means (114, 126) adapted to position said plug (120) on said cup (110) in a position, said service position, wherein the upper face (124) of said plug (120) coincides with the level of the surface of the blade root; locking means (117, 127) for locking the plug (120) in said operating position.
    公开号:FR3021714A1
    申请号:FR1454953
    申请日:2014-06-02
    公开日:2015-12-04
    发明作者:Kaelig Merwen Orieux；Thierry Georges Paul Papin
    申请人:SNECMA SAS；
    IPC主号:
    专利说明:

    [0001] TECHNICAL FIELD OF THE INVENTION The field of the invention relates to the field of turbomachine rectifiers and more particularly to the vanes of rectifiers. TECHNOLOGICAL BACKGROUND OF THE INVENTION A turbomachine with a double flow for aeronautical propulsion is shown diagrammatically in FIG. 1. It comprises a fan 10 delivering a flow of air of which a central part, called primary flow Fp, is injected into a compressor 12 which feeds a turbine 14 driving the blower. The peripheral part, called the secondary flow FS, of the air flow is in turn ejected to the atmosphere to provide a part of the thrust of the turbomachine 1, after having passed a ring of stationary vanes disposed downstream of the fan . This ring, called the rectifier 20 (also known by the acronym OGV for "Outlet Guide Vane") straighten the air flow at the output of the fan while limiting losses to the maximum., A decrease of 0.1% losses (for example reduction of the pressure) in the rectifier can cause a 0.2 point increase in efficiency on the assembly comprising the fan and the rectifier, the correspondence between the losses and the efficiency depending of course on the motor and the load Therefore, it is necessary to optimize the flow of air in the stream of the rectifier and to minimize the losses The vanes of the rectifier 20 are fixed on a hub 30 by means of screws. 2 illustrates a sectional view of a stator blade root at its attachment to the hub of the turbine engine 30. As illustrated, the blade root 2 comprises fastening orifices 22 allowing The fixing holes 22 are formed by a first through-bore 22a and a second blind bore 22b, having a larger diameter, opening at the level of the upper face. of the foot, whose diameter is adapted for the passage of the head 24 of the screwing means 23. A ring or a cup 25 may be positioned in the blind bore 22B between the screwing means 23 and the foot 21 so as to avoid matting or marking of parts. These bores create stop faces for the airflow leading to aerodynamic turbulence of the air flow in the rectifier's vein. To remedy this problem, it has been proposed to fill these bores (once the dawn in position) with a silicone-based compound known by the acronym RTV Silicone for "Room Temperature Vulcanizing" to remove all faces of stopping in the rectifier vein and in particular at the level of the blade roots. However, the use of this silicone-based compound requires a long drying time and therefore causes an increase in the duration of assembly operations. The use of silicone for filling the fixing holes also increases the disassembly time, especially during maintenance operations because it is necessary to remove the compound and clean the orifices before reassembly. GENERAL DESCRIPTION OF THE INVENTION In this context, the object of the invention is to provide a fastener aperture shutter which makes it possible to fill these fixing orifices after mounting the straightener vanes and to overcome the use of polymer-based filling thus making it possible to reduce the time required to assemble and dismantle the stator vanes of a turbomachine, while ensuring a continuity of the stator of the stator.
    [0002] To this end, the invention relates to a shutter of a fixing orifice of a fan stator blade of a turbomachine, said blade having a blade integral with a foot provided with fixing orifices, said shutter characterized in that it comprises: - a cup adapted to be secured in said fixing hole of a stator blade; - A cylindrical plug cooperating with said cup, said cap having an upper face having an inclination relative to the laying plane of said plug; A guiding means adapted to position said cap on said cup in a position, called the operating position, in which the upper face of said plug coincides with the level of the surface of the blade root; - Locking means for blocking the plug in said service position. The shutter according to the invention thus eliminates the use of a silicone-based compound for filling the fixing holes while preserving the continuity of the vein of the rectifier. The shutter according to the invention also has the advantage of having an obstacle locking means making it possible to ensure that the plug in position will not dislodge in flight. The shutter according to the invention may also have one or more of the following characteristics, considered individually or in any technically possible combination: said cup includes positioning pins for positioning said cup in the fixing orifice; a rectifier blade; - The positioning pins forms a key; said guide means is adapted to position said plug in said operating position by rotation; Said guide means is adapted to position said stopper by quarter turn; - Said guide means is formed by a lug arranged on said plug cooperating with a light arranged on said cup; 5 - the plug has at its upper face a fingerprint for the positioning of a tool; - The locking means is formed by a material allowance on said plug cooperating with a recess arranged on the cup; - The locking means is formed by a peripheral bead arranged on the lower part of the plug cooperating with a peripheral recess arranged on the cup. The subject of the invention is also a fan-shaped rectifier of a turbomachine comprising a hub and a plurality of blades having a blade and a foot, said foot having orifices for fastening the blades to said hub, said rectifier being characterized in that it comprises shutters according to the invention to fill the fixing holes of the blade roots. The invention also relates to a turbomachine characterized in that it comprises a fan rectifier according to the invention. The invention will be better understood in the light of the description which follows and with reference to the figures listed below. BRIEF DESCRIPTION OF THE FIGURES FIG. 1, already described, schematically represents a turbomachine with a double flow.
    [0003] Figure 2, already described, shows a sectional view of the foot of a stator blade at a blade attachment port. Figure 3 is a perspective view of a shutter according to the invention housed in the fixing holes of the stator vanes.
    [0004] Figure 4 is an exploded view of a shutter according to the invention housed in the fixing holes of the stator vanes. FIG. 5 shows a partial sectional view of a stator blade root of a turbomachine at a fixing orifice with the shutter according to the invention in position. Figure 6 shows a partial sectional view of the closure according to the invention. DETAILED DESCRIPTION OF EMBODIMENTS OF THE INVENTION With reference to FIGS. 3 and 4, the shutter 100 according to the invention is intended to bridge the fixing orifices provided at the level of the turbo-stator blade roots and which are needed to fix the stator vane on a hub. The shutter 100 is composed of two parts that are removable relative to one another: a cup 110, held in place at a hole 15 for fixing the blade root by the screwing means 23 ( referenced in Figure 5) of the blade and a removable cap 120 adapted to cooperate with the cup 110. The cup 110 has a base 111 of annular shape and a peripheral wall 112 projecting from the base 111, in one direction Perpendicular to the plane formed by the base 111. The base 111 has positioning means formed, for example, by two pins 113 which allow precise positioning of the cup 110 in the orifice 22 of the blade root 21. For this purpose, it is expected that the orifice 22 has two holes adapted to receive the pins 113 of the cup 110. It is also envisaged to make pins 113 with a different geometry or a different dimensioning so as to form a polarizer to ensure and facilitate the positioning operation of the cup 110 in the opening of the foot 21 of the stator blade. The two pins 113 also make it possible to perform a pre-hold of the cup 110 in the orifice 22 of the blade root 21 before the positioning of the screwing means 23. The central part of the annular base 111 allows the passage of the screwing means, and in particular of the threaded rod 27 of the screwing means 23 described with reference to FIG. 2. The base 111 of the cup 110 is intended to receive in abutment the head 24 of the screwing means 23, making it possible to secure the stator dawn on the hub. Thus the cup 110 of the shutter 100 according to the invention is secured in position in the orifice 22 of the blade root during assembly of the blade on the hub.
    [0005] The peripheral wall 112 of the cup 110 is also of annular shape and has a slot 114, or possibly two diametrically opposite slots, extending over a portion of the peripheral wall 112 and opening at the upper face 115 of the cup. . Light 114 forms the female part of a guiding means for guiding the plug and ensuring its correct positioning on the cup 110 but also its good orientation relative to the rectifier's vein. The stopper 120 of the shutter 100 has a cylindrical first portion 121 situated in the lower part and a second portion 122, also of cylindrical shape and having an outside diameter greater than the first portion 121 situated at the top, the second portion 122 capotant the lower portion 121 of the cover 120. The cover 120 has a peripheral shoulder 123, extending around the periphery and forming the separation between the two parts 121, 122 of the cover 120. The shoulder 123 is intended for contact the upper surface 115 of the cup 110 25 when the plug 120 is assembled on the cup 110. The plug 120 further comprises a lug 126, positioned at the lower portion 121, forming the male part of the means of guide. Thus the dimensions of the lug 126 are adapted so that it slides freely inside the light 114 of the cup 110. Of course, the plug may comprise two lugs, diametrically opposed, if the cup has two 3021714 7 lights 114. Thus, the positioning kinematics of the plug 120 is imposed by the shape of the light 114. Advantageously, the shape of the light 114 is adapted to allow locking of the plug by performing a rotation of 90 °, it is to say a quarter of a turn.
    [0006] To facilitate the rotation of the cap 120, it has, at its upper face 124, an imprint 127 for the introduction of a tool adapted to the shape of the cavity 127 (for example a flat screwdriver). Advantageously, the upper face 124 of the plug 120 has an inclination with respect to the laying plane of the stopper formed by the lower face 125, and thus also with respect to the plane formed by the base 111 of the cup 110. The inclination of the upper face 125 is determined so that in the service position on the cup 110, the upper face 124 of the plug 120 arrives at the upper surface 26 of the blade root 21 and coincides with the inclination 15 of the surface of the foot of dawn so as to reconstitute a continuous and smooth surface. FIG. 5 illustrates the shutter 100 according to the invention in position in an attachment orifice 22 of the blade 21 on a hub (not shown). Thus, thanks to the shutter according to the invention, the fixing orifices no longer form stop faces zo creating turbulence in the vein of the straightener. Of course, the position of the pins 113, as well as the shape and positioning of the light 114 on the peripheral wall of the cup are determined according to the inclination of the desired plug when it is in its operating position.
    [0007] The positioning of the plug 120 on the cup 110 in its service position has mainly been described by the realization of a 1/4 turn rotation, however, it is also envisaged to be able to lock the plug 120 with any angle of rotation. The shape of the light 114 will then be adapted accordingly to allow the determined rotation.
    [0008] In order to maintain and block the plug 120 in its operating position, and thus avoid the loss thereof or a change in its position in flight thereby causing the cap to protrude from the upper surface 26 of the foot, the plug 120 has a thickness of 5 material, for example in the form of a bead 127 located at its first portion 121. The bead 127 is advantageously continuous and arranged over the entire periphery of the plug 120. However, it It is also envisaged to make several portions of beads, and advantageously at least two, distributed over the periphery of the plug 120. The bead 127 is adapted to be inserted into a groove (shown in FIG. 6) arranged on the inside face. of the peripheral wall 112 of the cup 110 when the cap reaches its operating position. Therefore, the upper part of the cup 110 must have sufficient elasticity to allow the passage of the bead 127. 15
    权利要求:
    Claims (11)
    [0001]
    REVENDICATIONS1. Shutter (100) of a fixing orifice (22) of a turbomachine stator blade, said blade having a blade integral with a foot provided with fixing orifices, said shutter (100) being characterized in that it comprises: a cup (110) adapted to be secured in said fixing hole (22) of a stator vane; a plug (120) of cylindrical shape cooperating with said cup, said plug (120) having an upper face (124) having an inclination relative to the laying plane of said plug (120); guide means (114, 126) adapted to position said plug (120) on said cup (110) in a position, said service position, wherein the upper face (124) of said plug (120) coincides with the level of the surface of the blade root; locking means (117, 127) for locking the plug (120) in said operating position.
    [0002]
    2. Shutter (100) of a fixing orifice (22) of a turbomachine stator vane according to the preceding claim characterized in that said cup (110) comprises positioning pins (113) for the positioning of said cup in the mounting hole (22) of a stator vane.
    [0003]
    3. Shutter (100) of a fixing orifice (22) of a turbomachine stator vane according to the preceding claim characterized in that the positioning pins (113) form a polarizer.
    [0004]
    4. Shutter (100) of a fixing orifice (22) of a turbomachine stator vane according to one of the preceding claims characterized in that said guide means (114, 126) is adapted to position said plug, in said service position, by rotation.
    [0005]
    5. Shutter (100) of a fixing orifice (22) of a turbomachine stator vane according to one of the preceding claims characterized in that said guide means (114, 126) is adapted to position said cap quarter turn.
    [0006]
    6. Shutter (100) of a fixing orifice (22) of a turbomachine stator vane according to one of the preceding claims characterized in that said guide means (114, 126) is formed by a lug ( 126) arranged on said plug (120) cooperating with a slot (114) arranged on said cup (110). 15
    [0007]
    7. Shutter (100) of a fixing orifice (22) of a turbomachine stator vane according to one of the preceding claims characterized in that the cap (120) comprises at its upper face (124) a imprint for the positioning of a tool. 20
    [0008]
    8. Shutter (100) of a fixing orifice (22) of a turbomachine stator vane according to one of the preceding claims, characterized in that the locking means is formed by an excess thickness (127) of material on said cap (120) cooperating with a recess (117) arranged on the cup (110). 25
    [0009]
    9. Shutter (100) of a fixing orifice (22) of a turbomachine stator vane according to one of the preceding claims characterized in that the locking means is formed by a peripheral bead (127) arranged on the lower part (121) of the plug (120) cooperating with a recess (117) device arranged on the cup (110). 302 1,714 11
    [0010]
    10. A turbomachine fan rectifier comprising a hub and a plurality of blades having a blade and a foot, said foot (21) having orifices (22) for fixing the blades to said hub, said rectifier being characterized in that it comprises shutters (110) according to one of the preceding claims for filling the fixing orifices (22) of the blade roots (21).
    [0011]
    11. Turbomachine characterized in that it compotes a fan rectifier according to the preceding claim. 10
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    同族专利:
    公开号 | 公开日
    FR3021714B1|2016-06-24|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    US5988966A|1998-08-14|1999-11-23|Chen; Antony|Antitheft device for use with a bolt|
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    TWI526633B|2013-01-15|2016-03-21|直得科技股份有限公司|Bolt-hole cap for bolt hole in linear rail|
    WO2014152636A1|2013-03-15|2014-09-25|United Technologies Corporation|Selective coating removal or masking for ground path|US20180149080A1|2016-11-29|2018-05-31|Ford Global Technologies, Llc|Stud-engaging engine cover pocket plug|
    US10260414B2|2016-11-29|2019-04-16|Ford Global Technologies, Llc|Foam plug for engine cover fastener pocket|
    FR3063308B1|2017-02-24|2019-04-26|Safran Aircraft Engines|CAP FOR TURBOMACHINE ROTATING INPUT COVER, COMPRISING AERODYNAMIC EXTERNAL WALL AND CONE FASTENER|
    US10502133B2|2017-06-12|2019-12-10|General Electric Company|Fastener cover for flowpath fasteners|
    FR3082228B1|2018-06-08|2020-09-11|Safran Aircraft Engines|TURBOMACHINE PART INCLUDING A WASHER COOPERATING WITH A BLADE|
    法律状态:
    2015-06-18| PLFP| Fee payment|Year of fee payment: 2 |
    2015-12-04| PLSC| Search report ready|Effective date: 20151204 |
    2016-06-06| PLFP| Fee payment|Year of fee payment: 3 |
    2017-04-27| PLFP| Fee payment|Year of fee payment: 4 |
    2018-06-05| PLFP| Fee payment|Year of fee payment: 5 |
    2018-06-29| CD| Change of name or company name|Owner name: SAFRAN AIRCRAFT ENGINES, FR Effective date: 20170719 |
    2020-05-20| PLFP| Fee payment|Year of fee payment: 7 |
    2021-05-19| PLFP| Fee payment|Year of fee payment: 8 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1454953A|FR3021714B1|2014-06-02|2014-06-02|VANE FIXING ORIFICE SHUTTER FROM A TURBOMACHINE RECTIFIER|FR1454953A| FR3021714B1|2014-06-02|2014-06-02|VANE FIXING ORIFICE SHUTTER FROM A TURBOMACHINE RECTIFIER|
    US14/728,108| US9797266B2|2014-06-02|2015-06-02|Turbine engine guide vane attachment orifice closer|
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