• 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 invention relates to a device (2) for cooling by jet of air of the casing of a turbine of a turbomachine. This device comprises: - a housing (3) for supplying air under pressure, - at least two cooling tubes (40), curved, arranged around a portion of the housing and at a distance therefrom, and provided with air injection orifices opening towards the casing, - a three-way tee (5) for each cooling ramp (4), the foot of the T corresponding to the air inlet duct (51) connected to said housing (3), the two legs (52) of the T together defining a curved tubular zone (53), provided over its entire length with air injection orifices, one of the ends of each tube (40). ) being connected to said output channels (52), this T-piece (5) being disposed between the housing (3) and the outer surface of the casing, so that its concavity and its air injection orifices are directed towards the surface of the housing.
    公开号:FR3040428A1
    申请号:FR1557980
    申请日:2015-08-27
    公开日:2017-03-03
    发明作者:Jacques Marcel Arthur Bunel；Emeric D'herbigny；Alain Paul Madec；Pierre Tincelin；Benjamin Villenave
    申请人:SNECMA SAS；
    IPC主号:
    专利说明:

    GENERAL TECHNICAL FIELD The invention lies in the field of cooling a turbine casing.
    The present invention more specifically relates to an air jet cooling device of the casing of a turbine, preferably low pressure, a turbomachine. The invention also relates to a turbomachine equipped with such a device.
    STATE OF THE ART
    As can be seen in Figures 1 and 2 attached, which represent the state of the art, the low-pressure turbine of a turbomachine is protected by a housing C generally flared, substantially frustoconical. This housing is cooled using impact cooling technology.
    The casing C is equipped with one or more box (es) B of pressurized air supply, connected to several cooling ramps R.
    In the embodiment shown in the figures, the housing C is equipped with two housings B, positioned at about 180 ° from each other (only one being visible in Figure 2). In addition, each housing B is equipped with five ramps R, with two tubes T by ramps, each tube extending over about 90 °.
    As shown in the bottom view of the housing B of Figure 4 attached, the tubes T and the housing B are pierced with a series of small orifices O opening to the right of the outer surface of the housing. The pressurized air passing through these orifices O ensures an impact ventilation of the casing C.
    Moreover, and as can be seen in Figure 3 attached and in Figure 4, each tube T is connected to the housing B via a cylindrical sleeve D and each tube T is soldered in the sleeve D.
    However, as can be seen in Figure 4, the housing B does not have orifices O at both ends and the sleeves D either. On each side of the housing B, there is therefore a zone Z1, between the last orifice O of the housing B and the first orifice O of the tube T, in which there are no orifices, so no injection of air and therefore no cooling of the skin of the housing located opposite.
    In addition, the T tubes have a curved shape for the greater part of their length which substantially matches the curvature of the casing C. However, in order to ensure proper brazing of the tube T in the sleeve D, the end of the tube is rectilinear on an area 12, (see Figure 3).
    Consequently, the air gap between the tube T of the ramp R and the skin (outer surface) of the casing C is not constant over the entire circumference of the casing and especially the ramp moves away from the casing skin, which has a negative impact on cooling. It can thus be seen that the gap E1 desired between the tube and the casing can take on ever higher values E2 or even E3, the closer one is to the sleeve D. For example, for an air gap E1 of 3 , 5 mm, the values of E2 and E3 can reach respectively 4.8 mm and 8.5 mm.
    However, for air jet impact cooling to be effective, this gap must not only be constant but also of low value, determined by the crankcase specifications, (generally of the order of 2 mm to 3.5 mm).
    Thus, close to each housing B, there is no cooling of the casing C on two zones Z1 of a length of the order of 25 mm, ie 50 mm and poor cooling on two zones 12 of a length of 1 mm. 60 mm, or 120 mm.
    These areas not or slightly cooled are to be multiplied by the number of housings B disposed around the casing C, which number in some embodiments can be four.
    PRESENTATION OF THE INVENTION The invention therefore aims to solve the aforementioned drawbacks of the state of the art. The invention therefore particularly aims to provide an air jet cooling device of the casing of a turbine that allows to cool a portion of the outer surface (skin) of said housing larger than the devices of the state of the technique.
    Another object of the invention is to provide a device which provides uniform cooling of the housing, that is to say which ensures a gap as constant as possible between the cooling ramp and the outer surface of the housing. For this purpose, the invention relates to an air jet cooling device of the casing of a turbine, preferably low pressure, a turbomachine.
    According to the invention, this device comprises - a pressurized air supply box, - at least one cooling ramp comprising two cooling tubes, each cooling tube being curved, arranged around a portion of the housing and at distance from it, and being provided with air injection orifices opening towards the housing, - a three-way tee for each cooling ramp, the foot of the T corresponding to the inlet channel of air, the two branches of the T corresponding to the air outlet channels, the two branches of the T together defining a curved tubular zone, provided along its entire length of air injection orifices, the inlet channel of air being connected to the pressurized air supply box, one end of each tube being connected to the respective output channels, said T-fitting being disposed between the underside of said supply box and the outer surface of the board r, so that the concavity of its curved tubular zone is oriented towards the surface of the casing, that this curved tubular zone is spaced from the casing and that the air injection orifices of this zone open out facing the outer surface of said casing casing.
    Thanks to these characteristics of the invention, and in particular to the fact that the curved tubular zone of the T-fitting comprises air injection orifices along its entire length and that the tubes pierced with air injection orifices are connected directly to the T-connector, most of the crankcase surface receives air jets and is therefore cooled. Only the zone where the end of the cooling tube is connected to one of the outlet channels of the connection T, does not have air injection orifices.
    According to other advantageous and non-limiting features of the invention, taken alone or in combination: the gap between the curved tubular zone of the T-connector and the outer surface of the casing is constant or substantially constant; the air gap between the curved tubular zone of the T-piece and the outer surface of the casing is equal to or substantially equal to the air gap between the tube of a cooling ramp connected to this same T-piece and the outer surface of the casing; ; the value of the air gap between the curved tubular zone of the T-fitting and the outer surface of the casing and / or the value of the air gap between the tube of a cooling ramp connected to this same T-connector and the surface outer casing are less than or equal to 4 mm; the thickness of the tubes of the two outlet channels of the T-fitting taken at their mouths is thinner than the rest of the tube; - The section of the air inlet channel of the tee is equal to or substantially equal to the sum of the sections of the two air outlet channels of the same tee; - The pressurized air supply box is fixed at both ends to the upstream flange and the downstream flange of the housing. The invention also relates to a turbomachine comprising a turbine, in particular low pressure surrounded by a housing and equipped with the aforementioned cooling device.
    PRESENTATION OF THE FIGURES Other features and advantages of the invention will appear from the description which will now be made, with reference to the accompanying drawings, which represent, by way of indication but not limitation, a possible embodiment.
    In these drawings: FIG. 1 is a perspective view of a portion of a casing of a turbine of a turbomachine, equipped with cooling ramps according to the state of the art, FIG. in perspective of an air supply box and cooling ramps according to the state of the art, - Figure 3 is an elevational view of an air supply box and a part of the ramps of according to the state of the art, FIG. 4 is a perspective view from below of an air supply box and part of the cooling ramps according to the state of the art, FIGS. and 6 are perspective views, respectively of front and top of the cooling device according to the invention, - Figure 7 is a perspective view of the three-way tee and the two tubes of a cooling ramp. of the device according to the invention, - Figure 8 is a view similar to the Figure 7 but also showing the outer surface of the housing to be cooled, and - Figure 9 is a cross-sectional view of a portion of the housing to be cooled and the cooling device according to the invention.
    DETAILED DESCRIPTION
    As can be seen in Figures 8 and 9, the cooling device according to the invention allows to cool the casing 1 of a turbine. This casing 1 has a flared shape, generally comprising several successive frustoconical portions. It has an upstream end 11 and a downstream end 12. Its outer surface is referenced 13.
    The cooling device 2 comprises a pressurized air supply housing 3, at least one cooling ramp 4 and a three-way T-connector 5 for each ramp 4. This connection 5 makes it possible to connect the two tubes 40 of each ramp 4 to the power supply box 3, (see Figure 5).
    Preferably, the cooling device comprises several ramps 4, for example five in number in FIG. 9, distributed around the casing 1.
    As previously described with the device of the state of the art, the housing 1 may be equipped with two cooling devices, for example with two housings positioned at about 180 ° to each other and whose tubes of cooling extend on each side of this housing, about 90 °. The housing can also be equipped with four cooling boxes, the tubes of the cooling ramps then extending on a smaller angular surface.
    As can be seen in Figures 7 and 9, each tube 40 is pierced with a plurality of orifices 41 of air injection.
    The housing 3 is connected to a pressurized air supply source, not shown in the figures.
    As shown in Figure 9, this housing 3 is disposed outside the outer surface 13 of the housing 1 and at a distance therefrom. In the embodiment shown here, this housing 3 is fixed to the casing 1 by means of an upstream flange 31, itself secured to the upstream end 11 of the casing and with the aid of a downstream flange 32. , itself secured to the downstream end 12 of the casing 1. Other methods of fixing the housing are conceivable.
    The housing 3 comprises a lower face 33.
    As best seen in FIGS. 5 to 7, the T-connector 5 comprises three lanes, namely an air inlet lane 51 formed in the foot of the T and two air outlet lanes 52, corresponding to the branches of T.
    Each tube 40 is curved, that is to say it has an arcuate shape whose radius is slightly greater than that of the portion of the casing in front of which it is intended to be positioned. Each tube 40 is fixed at a distance from the casing 1.
    For each cooling ramp 4, one of the ends of a tube 40 is connected to one of the air outlet channels 52. More specifically, this end is fitted into the mouth 520 of the outlet channel 52 and is soldered or soldered therewith. As a result, the section of the tube 40 is smaller than the section of the air outlet lane 52.
    The air inlet channel 51 of the T-piece 5 is connected to the supply box 3 and opens inside thereof, in fluid communication with the latter (see FIG. 6).
    Advantageously, the section of the inlet channel 51 is equal to or substantially equal to the sum of the sections of the two air outlet channels 52 of this same tee, so as not to disturb the flow of the flow. air.
    The two outlet channels 52 of the T-piece 5 together form a curved tubular zone 53, provided over its entire length with air injection orifices 54.
    The tubular zone 53 is curved, that is to say that it has an arcuate shape whose radius is slightly greater than that of the portion of the casing in front of which it is intended to be positioned. In addition, the air injection orifices 54 are aligned with each other and along the longitudinal axis of the zone 53 and they are positioned at the concavity of the tubular zone 53 (see FIG. 7).
    The tubes 40 are fixed to the connection 5 so that their orifices 41 are aligned with the orifices 54.
    Since the air injection orifices 54 are arranged all along the T-piece 5 and the tubes 40 are fitted directly into the T-piece 5, there are no more zones with no injection orifices. as was the case with the device of the state of the art.
    The T-piece 5 is fixed under the underside 33 of the pressurized air supply housing 3 so that the concavity of its curved tubular zone 53 is oriented towards and away from the surface of the housing. way to marry substantially the shape of this housing. The injection ports 54 open opposite the housing and allow the cooling thereof.
    The zone 53 is preferably curved so that the gap E4 between the connection 5 and the outer surface 13 of the casing 1 is constant or substantially constant, especially during operation of the turbine, that is to say when hot.
    Also preferably, this gap E4 is calculated to be equal to or substantially equal to the air gap E5 existing between a tube 40 and the outer surface 13 of the casing 1.
    Preferably, the value of these air gaps E4 and E5 is between 2 mm and 4 mm, preferably equal to 3.5 mm.
    Preferably, the thickness of the tube at the mouth 520 is thinned, so as to avoid contact between this mouth and the outer surface of the housing 1.
    Furthermore, by adjusting the angle α which exists between the median plane P1 transversely cutting the T-piece 5 and the plane P2 of the mouth 520 of the outlet orifice 52 and also acting on the length L1 of the zone rectilinear mouth 520, it is possible to better adjust the air gap E4 between the T-connector and the outer surface 13 of the housing 1.
    As can be seen in FIG. 9, when the device comprises several cooling ramps 4, the radius of the curved tubular zone 53 of each T-piece 5 is adapted so as to fit the shape of the portion of the casing as closely as possible. 1 in front of which it is located, the casing 1 having increasing radii from its upstream end 11 to its downstream end 12.
    权利要求:
    Claims (8)
    [1" id="c-fr-0001]
    1. Device (2) cooling by air jets of the casing of a turbine, preferably low pressure, a turbomachine, characterized in that it comprises: - a housing (3) for supplying air under pressure, - at least one cooling ramp (4) comprising two cooling tubes (40), each cooling tube (40) being curved, disposed around and away from a portion of the housing, and being provided with of air injection orifices (41) opening towards the housing, - a three-way tee (5) for each cooling ramp (4), the foot of the T corresponding to the inlet channel of air (51), the two branches of the T corresponding to the air outlet channels (52), the two branches of the T defining together a curved tubular zone (53), provided along its entire length with injection orifices of (54), the air intake path (51) being connected to the pressurized air supply casing (3), one end of each tube ( 40) being connected to the respective output channels (52), this T-fitting (5) being disposed between the underside (33) of said supply box (3) and the outer surface of the housing, so that the concavity of its curved tubular zone (53) is oriented towards the surface of the casing, this curved tubular zone is spaced from the casing and the air injection orifices (54) of this zone (53) emerge opposite the outer surface of said housing.
    [2" id="c-fr-0002]
    2. Device according to claim 1, characterized in that the gap (E4) between the tubular zone (53) of the curved T-connector and the outer surface of the housing is constant or substantially constant.
    [3" id="c-fr-0003]
    3. Device according to claim 2, characterized in that the gap (E4) between the curved tubular zone (53) of the T-fitting and the outer surface of the housing is equal to or substantially equal to the gap (E5) between the tube (40) of a cooling ramp connected to the same T-piece (5) and the outer surface of the housing.
    [4" id="c-fr-0004]
    4. Device according to one of the preceding claims, characterized in that the value of the gap (E4) between the curved tubular zone (53) of the T-fitting and the outer surface of the housing and / or the value of the air gap (E5) between the tube (40) of a cooling ramp connected to the same T-connection (5) and the outer surface of the housing are less than or equal to 4 mm.
    [5" id="c-fr-0005]
    5. Device according to one of the preceding claims, characterized in that the thickness of the tubes of the two output channels (52) of the T-connector taken at their mouths (520) is thinner than the rest of the tube.
    [6" id="c-fr-0006]
    6. Device according to one of the preceding claims, characterized in that the section of the air inlet channel (51) of the T-fitting is equal to or substantially equal to the sum of the sections of the two output channels of air (52) of this same tee.
    [7" id="c-fr-0007]
    7. Device according to one of the preceding claims, characterized in that the pressurized air supply casing (3) is fixed at its two ends to an upstream flange (31) and a downstream flange (32) of the casing. .
    [8" id="c-fr-0008]
    8. A turbomachine comprising a turbine, in particular a low pressure turbine, surrounded by a housing (1), characterized in that it comprises a device (2) for cooling by air jets of said housing, according to any one of preceding claims.
    类似技术:
    公开号 | 公开日 | 专利标题
    EP3445949B1|2020-04-29|Device for cooling a turbine casing with air jets
    FR3040428A1|2017-03-03|DEVICE FOR COOLING AIR JETS OF THE CARTER OF A TURBINE OF A TURBOMACHINE
    EP1251243B1|2005-09-07|Turbine blade with cooling air baffle
    CA2754419C|2017-04-04|Turbine engine combustion chamber comprising improved air supply means
    CA2908855C|2020-07-28|Device for deicing an aeronautical turbomachine separator
    CA2626907A1|2008-09-30|Turbine engine nose including a system for deflecting foreign bodies, such as hailstones
    EP3341570B1|2019-05-01|Device for attaching manifolds for cooling the casing of a turbine-engine turbine by air jets
    LU83084A1|1981-09-10|DEVICE FOR SUPPORTING THE FIRST PASS WELDING BATH IN THE AUTOMATIC TUBE WELDING
    WO2012013890A1|2012-02-02|Cleaning accessory for a viewing system, and corresponding cleaning assembly
    EP2420138B1|2014-07-02|System for producing at least one air current with elongate cross section
    EP3683429B1|2021-10-27|Internal structure of a primary ejection conduit
    FR2945086A1|2010-11-05|Pneumatic air pump for use in aspiration and blowing installation, has auxiliary air inlet supplied by air outlet of standard distributor to generate air aspiration at side of aspiration end
    EP3680451A1|2020-07-15|Rotor, turbine provided with such a rotor and turbine engine equipped with such a turbine
    FR2892893A1|2007-05-11|Treatment product spray gun for e.g. vineyard, has hollow tubular shaped arm with insert having housing in which spreading nozzles are fixed in order to withdraw nozzles with respect to external surface of arm
    CA2934827A1|2015-07-02|Hydraulic assembly of a generator of medium-pressure and high-pressure pulsed or non-pulsed jets
    FR3092913A1|2020-08-21|Sniffer probe and leak detector
    FR3094415A1|2020-10-02|Exhaust gas recirculation tapping box
    FR3044765A1|2017-06-09|AIR INTAKE CHIMNEY FOR FIRM TURBOMACHINE TEST BENCH
    FR2966063A1|2012-04-20|Device for maximum recovery of exhaust gas of motor vehicle in e.g. garage, has hooking pin connecting device to flexible suction pipe to allow evacuation of exhaust gas toward suction system
    WO2018036966A1|2018-03-01|Fuel injector nozzle body
    FR2972224A1|2012-09-07|TUYERE WITH DOWN CORE HAVING A HEAVY CURVATURE
    WO2015145015A1|2015-10-01|Intake manifold for an internal combustion engine of a motor vehicle
    EP2568217A1|2013-03-13|Head for a heating hand tool with no temperature increase along the nozzle
    WO2017060605A1|2017-04-13|Ring-shaped combustion chamber for a turbine engine
    FR2996284A1|2014-04-04|ANNULAR CHAMBER FOUNDER FOR AIRCRAFT TURBOMACHINE COMBUSTION CHAMBER, PROVIDED WITH PERFORATIONS FOR GYRATORY FLOW COOLING
    同族专利:
    公开号 | 公开日
    FR3040428B1|2017-09-01|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    EP1205637A1|2000-11-09|2002-05-15|Snecma Moteurs|Cooling device for stator ring|
    EP2243931A2|2009-04-16|2010-10-27|Rolls-Royce plc|Turbine casing cooling|FR3079874A1|2018-04-09|2019-10-11|Safran Aircraft Engines|COOLING DEVICE FOR TURBINE OF A TURBOMACHINE|
    WO2020049259A1|2018-09-06|2020-03-12|Safran Aircraft Engines|Pressurized-air supply unit for an air-jet cooling device|
    FR3099790A1|2019-08-09|2021-02-12|Safran Aircraft Engines|Device for attaching an air supply unit to a cooling device for a turbomachine casing|
    US11280217B2|2018-09-06|2022-03-22|Safran Aircraft Engines|Pressurized-air supply unit for an air-jet cooling device|
    法律状态:
    2016-08-04| PLFP| Fee payment|Year of fee payment: 2 |
    2017-03-03| PLSC| Search report ready|Effective date: 20170303 |
    2017-05-15| PLFP| Fee payment|Year of fee payment: 3 |
    2018-07-20| PLFP| Fee payment|Year of fee payment: 4 |
    2018-09-14| CD| Change of name or company name|Owner name: SAFRAN AIRCRAFT ENGINES, FR Effective date: 20180809 |
    2019-07-22| PLFP| Fee payment|Year of fee payment: 5 |
    2020-07-21| PLFP| Fee payment|Year of fee payment: 6 |
    2021-07-22| PLFP| Fee payment|Year of fee payment: 7 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1557980A|FR3040428B1|2015-08-27|2015-08-27|DEVICE FOR COOLING AIR JETS OF THE CARTER OF A TURBINE OF A TURBOMACHINE|FR1557980A| FR3040428B1|2015-08-27|2015-08-27|DEVICE FOR COOLING AIR JETS OF THE CARTER OF A TURBINE OF A TURBOMACHINE|
    [返回顶部]