• 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 (1) for separating an air / oil mixture comprising an air / oil mixture inlet (8), an enclosure (9) for receiving oil, a pipe (11) for circulation of oil. air, at least one filter element (21) coupled in rotation to a rotary drive shaft (12), the device (1) being designed so that the mixture coming from the aforementioned inlet (8) opens into the enclosure (9) and is driven through the filter element (21) driven in rotation, so that the oil contained in the mixture is centrifuged radially outside the filter element (21) and brought in the oil receiving chamber (9), the filtered air emerging in the air circulation pipe (11), characterized in that the rotary drive shaft (12) is coupled to a turbine (26) capable of being driven in rotation by at least part of the filtered air flow, the turbine (26) comprising an outlet (29) of the filtered flow which opens outwards.
    公开号:FR3090394A1
    申请号:FR1873420
    申请日:2018-12-19
    公开日:2020-06-26
    发明作者:Gérard Claude GUILLEMONT Maxence；Raymond Germain Becquerelle Samuel
    申请人:Safran Transmission Systems SAS；
    IPC主号:
    专利说明:

    Description
    Title of the invention: Device for separating an air / oil mixture
    Technical field of the invention
    The invention relates to a device for separating an air / oil mixture as well as an accessory box for a turbomachine.
    State of the art
    An accessory box constitutes equipment used to support and mechanically drive other equipment called accessories, such as electric generators, oil or fuel pumps, or the like, necessary for the operation of the turbomachine or of the aircraft on which the turbomachine is mounted. In order to provide this drive, the power required is taken from a main shaft of the turbomachine, generally by means of a radial return shaft meshed with the main shaft, to mechanically transmit this power to the accessory box.
    The accessory box conventionally comprises a fixed casing, in which are housed gears used to distribute power to the various accessories.
    The accessory box can also be associated with a device for separating an air / oil mixture, also called an oil separator, as is known from document LR 3 064 305 in the name of the Applicant.
    To do this, air is taken directly from the air stream of the turbomachine. This air then passes through the turbomachine, then is discharged towards the outside of the turbomachine to limit the rise in pressure in the other areas of the turbomachine. This air having passed through different areas of the turbomachine is loaded with oil used for cooling and lubricating the bearings and pinions of the rotating assemblies. To avoid the rejection of oil-laden air, mitigate the ecological impact of turbomachinery, reduce oil consumption and limit the filling operations of oil reserves, it is important to provide devices to separate the air oil before evacuating the air to the outside of the turbomachine.
    Figure 1 illustrates such a device 1 fitted to an accessories box 2. The accessories box 2 comprises a hollow casing 3 delimiting an internal volume 4, closed by a cover 5, and containing a set of gears 6 formed by pinions or toothed wheels, intended to distribute the power taken from the shaft of the turbomachine to the various pieces of equipment of the turbomachine. The accessories box 2 comprises a fixed casing 7, integral with the cover 5, said casing 7 delimiting an inlet 8 for the oil / air mixture at the top, an annular oil receiving enclosure 9 comprising an oil outlet 10 in lower part, and a central air circulation pipe or channel 11.
    The device 1 further comprises a rotating shaft 12 of axis X, comprising a hollow front part (first part) 13 pivotally mounted in a housing 14 of a front radial partition 15 of the casing 3 and in a central opening 16 of the cover 5, by means of rolling bearings 17. The front part 13 of the shaft 12 also comprises toothed pinions 18, here in one piece with the front part 13 of the shaft 12, meshing with the pinions 6 of the accessory box 2, so as to drive the shaft 12 in rotation.
    The axial and radial terms are defined relative to the X axis.
    Said shaft 12 further comprises a rear part 19 (second part opposite the first part with respect to the X axis) hollow, widening towards the rear and having an internal annular part 22. L rear end of the part 19 is coupled in rotation, for example by welding, to a cassette 20 supporting the filter elements 21. In operation, the rotation of the shaft of the turbomachine causes the shaft 12, of the part 19 and of the cassette 20 comprising the filter elements 21, around the axis X, with respect to the casing 7, the casing 3 and the cover 5.
    A mixture of air and oil is brought into the casing 7 through the inlet 8, then passes through the filter elements 21 where the oil is separated from the air and is extracted radially outward by effect centrifugal, before opening into the oil receiving enclosure 9 where it is discharged in the lower part by the outlet 10.
    The filtered air having passed through the filter elements 21 passes through the internal volume of the hollow rear part 19 of the shaft 12, and enters the air circulation channel 11 before being exhausted to the outside.
    There is currently a need to recover as much energy as possible in order to improve the efficiency of the turbomachine.
    The invention aims to provide a solution to this need, in a simple, inexpensive and reliable manner.
    Summary of the invention
    To this end, the invention provides a flow from an air / oil mixture comprising a flow inlet, an oil receiving chamber, an air circulation pipe, at least one filter element coupled in rotation to a drive shaft in rotation with a longitudinal axis, the separation device (being designed so that the flow coming from the aforementioned flow inlet opens into the enclosure (and is entrained through the filter element driven in rotation, so that the oil contained in the flow is centrifuged radially outside the filter element and brought into the oil receiving chamber, the filtered flow emerging in the line air circulation, characterized in that the rotary drive shaft is coupled to a turbine capable of being driven in rotation by at least part of the filtered flow, the turbine comprising an air outlet which opens out towards the outside.
    The turbine thus drives the rotary drive shaft as well as the filter element, regardless of the speed of the turbomachine. In fact, the speed of rotation of the turbine, and therefore the efficiency of filtration, is dependent on the flow of filtered air, and therefore on filtration needs. In particular, the speed of rotation of the drive shaft is mechanically independent of the kinematic chain of the equipment support of the accessory box, and is therefore independent of the speed of rotation of a shaft of the turbomachine.
    Such a structure makes it possible to improve the efficiency of the separation of the oil and the air. It will be recalled that the volume flow rate of air to be treated is not only dependent on the operating regime of the turbomachine, but is also dependent on the air pressure, and therefore on the altitude.
    The axial and radial terms are defined relative to the axis of the rotational drive shaft.
    The air from the turbine can be released into the atmosphere.
    The turbine may include an air inlet, the air circulation pipe comprising an air outlet, a pipe connecting the air circulation pipe to the air inlet of the turbine so as to direct the filtered flow to the turbine air inlet.
    The turbine can be a radial turbine, the air inlet of the turbine extending radially, the air outlet of the turbine extending along the axis.
    The device may comprise a fixed casing, delimiting the inlet of the flow and the oil receiving enclosure, said casing also delimiting the air circulation pipe, the rotary drive shaft comprising a first part provided with a free end rotatably coupled to a rotor of the turbine, and a second part opposite the first part with respect to the axis, the second part being hollow and supporting the filter element at its radially outer periphery.
    A hollow support element can be pivotally mounted relative to the casing, at the air circulation pipe, said support element supporting the filter element at its radially internal periphery.
    The fixed casing may include an oil outlet located in a lower part of the oil receiving enclosure.
    The air filtered through the filter element is thus capable of opening into the internal volume of the second hollow part of the shaft and then is directed towards the air circulation pipe through the element hollow support.
    Furthermore, the oil separated from the mixture opens into the oil recovery enclosure and is then extracted at the bottom of said enclosure, through the oil outlet.
    The invention further relates to an accessory box for a turbomachine, comprising a casing housing gear means capable of being driven by a shaft of the turbomachine and capable of rotating at least one piece of equipment, characterized in that it comprises a separation device of the aforementioned type, characterized in that the turbine is located axially on a first side of the housing of the accessory box, the air circulation pipe, the enclosure for receiving oil and the filter element being located axially on a second side of said housing, the rotary drive shaft of said separation device axially passing through said housing.
    The rotational drive shaft is supported by said housing, by means of bearings.
    The bearings are for example rolling bearings, such as ball or roller bearings.
    Such an arrangement makes it possible to take advantage of the housing of the accessory box as a support means, while having the freedom to place the separation device freely on the housing, since it is independent of the kinematic chain of the housing. accessories. This makes it possible to promote the integration of the separation device, in particular by reducing the length of the air and / or oil pipes for example.
    The housing may have a generally bell-shaped part, closed by a cover extending radially.
    The rotary drive shaft of the separation device can be devoid of coupling means to the gear means of the accessory box.
    The invention further relates to a turbomachine comprising an accessory box of the aforementioned type.
    Brief description of the figures
    [Fig.l] shows a sectional view of a device for separating an air / oil mixture fitted to an accessory box, in accordance with the prior art,
    [Fig-2] is a perspective view in section of a compressor housing equipped with an accessory box and a device for separating an air / oil mixture according to one embodiment of the invention,
    [FIG. 3] is a view corresponding to FIG. 1, illustrating a device for separating an air / oil mixture fitted to an accessory box, in accordance with the invention,
    [Fig-4] is a perspective view of the rotor of the turbine,
    [Fig.5] is a side view of the rotor of the turbine.
    Detailed description of the invention
    Figures 2 and 3 show a device 1 for separating an air / oil mixture fitted to an accessory box 2, in accordance with an embodiment of the invention.
    The accessory box 2 comprises a fixed casing 3, fixed on a compressor casing 25 and in which are housed gears used to distribute the power to the various accessories.
    The device for separating the air / oil mixture is also called an oil separator.
    As best seen in Figure 3, the fixed housing 3 is hollow and defines an internal volume 4, closed at the rear by a cover 5. The housing 3 contains a set of gears formed by pinions or toothed wheels (not visible), intended to distribute the power taken from the shaft of the turbomachine to the various pieces of equipment in the turbomachine. The accessories box 2 comprises a fixed casing 7, integral with the cover 5, said casing 7 defining an inlet 8 for the oil / air mixture at the top, an enclosure 9 for receiving annular oil comprising an oil outlet 10 in lower part, and a central air circulation pipe or channel 11.
    The terms high and low are defined with respect to gravity. The lower part is thus the part towards which the oil migrates by gravity.
    The device 1 further comprises a rotating shaft 12 of axis X, comprising a front part 13 pivotally mounted in a housing 14 of a radial partition 15 before the housing 3 and in a central opening 16 of the cover 5, by by means of rolling bearings 17. The front part 13 of the shaft 12 is devoid of toothed pinions meshing with pinions of the accessory box.
    The front part 13 of the shaft 12 passes axially through the casing 3 of the accessory box 2 and opens out in front of the latter.
    The front is thus located on the left in Figure 3, the rear being located on the right in this figure.
    The axial and radial terms are defined with respect to the X axis.
    A turbine rotor 26 is mounted and coupled in rotation to the front end 13a of the front part 13 of the shaft 12. The turbine rotor 26 is associated with a turbine casing 27 so as to form a turbine radial comprising an air inlet 28 directed radially and located radially outside the rotor 26 and comprising an air outlet 29 oriented along the axis X of rotation of the rotor 26. Said rotor 26 comprises fins 30 or blades whose shape is best visible in Figures 4 and 5.
    The outlet 31, that is to say the rear end, of the central air circulation channel 11, is connected to the air inlet 28 of the turbine via a pipe not shown.
    Said shaft 12 further comprises a hollow rear portion 19, widening towards the rear, comprising an internal annular portion 22. The rear end of the portion 19 is coupled in rotation, for example by welding, to a cassette 20 supporting filter elements 21. The filter elements 21 are for example formed by metal foams, as is known in particular from document FR 3 064 305. The radially internal periphery of the cassette 20 is supported by the internal part 22, mounted pivoting on the casing 7, in particular at the level of the central air circulation channel 11, by means of sealing means 23, 24.
    In operation, a mixture of air and oil is brought into the casing 7 through the inlet 8, then passes through the filter elements 21 where the oil is separated from the air and extracted radially outward. by centrifugal effect, before opening into the oil receiving enclosure 9 where, thanks to gravity, it is evacuated at the bottom by the outlet 10.
    In particular, the oil drops contained in the air / oil mixture are captured by the filter elements 21 and move towards the radially external periphery of the cassette 20 due to the centrifugal force resulting from the rotation of said cassette 20 supporting the filter elements 21. Then, the drops of oil are directed by gravity towards the outlet 10.
    The filtered air having passed through the filter elements 21 passes through the internal volume of the hollow rear part 19 of the shaft 12, and enters the air circulation channel 11 before being directed towards the inlet 28 of the turbine via the above-mentioned pipe. This air then drives the turbine rotor 26, which itself drives the rotation of the shaft 12, the filter elements 21, the ring 20 and the sleeve 22, around the axis X, relative to the casing 7 casing 3 and cover 5.
    In particular, the air penetrates radially from the outside towards the inside in the turbine. The shape of the fins and more generally of the turbine rotor 26 makes it possible to transform the kinetic energy of the air flow into a rotational movement of the turbine rotor 26. The latter being coupled in rotation to the shaft 12, the rotation of the turbine rotor 26 drives the shaft 12 in rotation.
    The use of filtered air to supply the turbine makes it possible to recover a maximum of energy in order to improve the efficiency of the turbomachine.
    权利要求:
    Claims (1)
    [1" id="c-fr-0001]
    Claims [Claim 1] Device for separating (1) a flow from an air / oil mixture comprising a flow inlet (8), an enclosure (9) for receiving oil, an air circulation pipe (11), at at least one filter element (21) coupled in rotation to a rotation drive shaft (12) of longitudinal axis (X), the separation device (1) being designed so that the flow coming from the inlet flow (8) above opens into the enclosure (9) and is driven through the filter element (21) driven in rotation, so that the oil contained in the flow is centrifuged radially outside the filter element (21) and brought into the oil receiving chamber (9), the filtered flow opening into the air circulation pipe (11), characterized in that the rotary drive shaft ( 12) is coupled to a turbine (26) capable of being driven in rotation by at least part of the filtered flow, the turbine (26) comprising an air outlet (29) which opens to the outside. [Claim 2] Separation device (1) according to claim 1, characterized in that the turbine (26) has an air inlet (28), the air circulation pipe (11) having an air outlet (31), a pipe connecting the air circulation pipe (11) to the air inlet (28) of the turbine (26) so as to direct the filtered flow to the air inlet (28) of the turbine ( 26). [Claim 3] Separation device (1) according to claim 2, characterized in that the turbine (26) is a radial turbine, the air inlet (28) of the turbine extending radially, the air outlet (29) of the turbine (26) extending along the axis (X). [Claim 4] Separation device (1) according to one of claims 1 to 3, characterized in that it comprises a fixed casing (7), delimiting the inlet of the flow (8) and the oil reception enclosure (9 ), said casing (7) also delimiting the air circulation pipe (11), the rotary drive shaft (12) comprising a first part (13) provided with a free end (13a) coupled in rotation to a rotor (26) of the turbine (28), and a second part (19) opposite the first part (13) with respect to the axis (X), the second part (13) being hollow and supporting the filter element (21) at its radially outer periphery. [Claim 5] Separation device (1) according to one of claims 1 to 4, characterized in that a hollow support element (22) is pivotally mounted relative to the housing (7), at the level of the air circulation pipe
    (11), said support element (22) supporting the filter element (21) at its radially internal periphery. [Claim 6] Separation device (1) according to one of claims 1 to 5, characterized in that the fixed casing (7) has an oil outlet (10) located in a lower part of the oil reception enclosure ( 9). [Claim 7] Accessory box (2) for a turbomachine, comprising a casing (3) housing gear means capable of being driven by a shaft of the turbomachine and capable of driving at least one piece of equipment, characterized in that it comprises a separation device (1) according to one of claims 1 to 6, characterized in that the turbine (26) is located axially on a first side of the casing (3) of the accessory box (2), the air circulation pipe (11), the oil reception enclosure (9) and the filter element (21) being located axially on a second side of said casing (3), the drive shaft in rotation (12) of said separation device (1) axially passing through said casing (3). [Claim 8] Accessory box (2) according to claim 7, characterized in that the rotational drive shaft (12) is supported by said housing (3), by means of bearings (17). [Claim 9] Accessory box (2) according to claim 7 or 8, characterized in that the rotary drive shaft (12) of the separation device (1) is devoid of means for coupling to the gear means of the box d '' accessories (2). [Claim 10] Turbomachine comprising an accessory box (2) according to any one of claims 7 to 9.
    1/3
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    同族专利:
    公开号 | 公开日
    CN111330360A|2020-06-26|
    EP3669964A1|2020-06-24|
    FR3090394B1|2021-12-24|
    US20200238208A1|2020-07-30|
    EP3669964B1|2021-01-06|
    US11110379B2|2021-09-07|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US6017300A|1998-08-19|2000-01-25|Fleetguard, Inc.|High performance soot removing centrifuge with impulse turbine|
    US20040214710A1|2003-04-23|2004-10-28|Herman Peter K.|Integral air/oil coalescer for a centrifuge|
    US20130056407A1|2010-01-27|2013-03-07|Cummins Filtration Ip, Inc.|Rotating Separator with Housing Preventing Separated Liquid Carryover|
    US20130319240A1|2012-06-05|2013-12-05|Hamilton Sundstrand Corporation|Deoiler seal|
    FR3064305A1|2017-03-21|2018-09-28|Safran Helicopter Engines|CENTRIFUGAL DEGRAYER OF TURBOMACHINE|
    CN106917655A|2017-04-18|2017-07-04|合肥恒信汽车发动机部件制造有限公司|One kind rotation cylinder filtering type gs-oil separator|
    GB201117662D0|2011-10-13|2011-11-23|Rolls Royce Plc|Fluid separator|US11255265B2|2019-03-04|2022-02-22|Rolls-Royce Corporation|Air-oil separation system for gas turbine engine|
    CN112065534B|2020-09-18|2021-07-06|神通科技集团股份有限公司|Active oil-gas separator|
    法律状态:
    2019-11-20| PLFP| Fee payment|Year of fee payment: 2 |
    2020-06-26| PLSC| Publication of the preliminary search report|Effective date: 20200626 |
    2020-11-20| PLFP| Fee payment|Year of fee payment: 3 |
    2021-11-18| PLFP| Fee payment|Year of fee payment: 4 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1873420A|FR3090394B1|2018-12-19|2018-12-19|Device for separating an air/oil mixture|FR1873420A| FR3090394B1|2018-12-19|2018-12-19|Device for separating an air/oil mixture|
    CN201911298116.7A| CN111330360A|2018-12-19|2019-12-17|Air/oil mixture separating device|
    US16/718,098| US11110379B2|2018-12-19|2019-12-17|Device for separating an air/oil mixture|
    EP19217375.5A| EP3669964B1|2018-12-19|2019-12-18|Device for separating a mix of air/oil|
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