CN1995763A - 变斜度叶片及具有该叶片的涡轮机和其压缩机 - Google Patents
变斜度叶片及具有该叶片的涡轮机和其压缩机 Download PDFInfo
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- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims abstract description 34
- 229910052719 titanium Inorganic materials 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims description 28
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 26
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- 229910052751 metal Inorganic materials 0.000 claims description 6
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- 229910045601 alloy Inorganic materials 0.000 description 3
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- 238000002490 spark plasma sintering Methods 0.000 description 3
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 0.000 description 3
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- 230000000694 effects Effects 0.000 description 1
- 239000007770 graphite material Substances 0.000 description 1
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- 238000001746 injection moulding Methods 0.000 description 1
- 238000009342 intercropping Methods 0.000 description 1
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- 238000005259 measurement Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- 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
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- F05D2300/00—Materials; Properties thereof
- F05D2300/10—Metals, alloys or intermetallic compounds
- F05D2300/13—Refractory metals, i.e. Ti, V, Cr, Zr, Nb, Mo, Hf, Ta, W
- F05D2300/133—Titanium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
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Abstract
本发明公开一种涡轮机压缩机的变斜度叶片,所述叶片包括安装在涡轮机外壳(22)中且可绕叶片的导轴(8)旋转的轴套(18),所述轴套(18)与所述导轴(8)之间的回转接触面是镍-石墨与钛类型的。
Description
技术领域
本发明涉及变斜度叶片的一般领域。一个特定应用是在航空领域,尤其用于控制涡轮机压缩机中的进气口导向叶片的倾斜角。
背景技术
在涡轮机中,高压压缩机通常由许多变斜度叶片的级组成,以利于根据涡轮机运转速度改变气体的流动特性。
给定级中的变斜度叶片均有其顶部的控制轴和根部的导轴,控制轴穿过涡轮机的定子外壳且与叶片倾斜角的控制构件相配合,而导轴安装在涡轮机壳体内环凹座中嵌入的轴套中且可以转动。通过对控制构件的作用可改变所述级中叶片的倾斜角。
通过绕导轴在轴套内的转动因而将变斜度叶片定位,且只有一个自由度。因此轴套必须将作用于叶片的力传给外壳的内圈,且它们必须能承受叶片导轴的摩擦,即它们必须既要摩擦系数低又要耐磨性能好。
为了满足这些要求,如果变斜度叶片的导轴是钢制的,则众所周知,轴套不要用石墨基的材料制造。在现代涡轮机中,变斜度叶片受到很高的机械应力,导致其导轴过早的磨损。于是经几千小时运转后就需更换叶片,这从成本上讲是不可接受的。
发明内容
本发明的主要目的是通过提出一种摩擦系数低且耐磨性好的叶片和轴套来缓解这类缺点。
此目的的实现是靠一种涡轮机压缩机的变斜度叶片,所述叶片包括轴套,安装在涡轮机外壳内且能绕所述叶片的导轴转动。根据本发明,所述轴套与所述导轴间的回转接触面是镍-石墨对钛类型的。
本申请人业已发现,在连续摩擦时石墨起固体润滑剂的作用,因此,它所提供的摩擦系数相对较低,而且石墨与钛之间的摩擦导致在粗糙度的峰值处形成碳化钛,从而确保在所述轴套与所述叶片导轴之间有良好的抗磨性。因此所述叶片的使用寿命,特别是叶根的使用寿命被延长。
可以预计有几个不同的实施例。在本发明的一个实施例中,当所述导轴是用钛基材料制造时,所述轴套便用镍基和石墨基的材料构成。在此情况下,所述轴套可通过将镍基和石墨基的粉末在模具中烧结而成。
在本发明的另一实施例中,当所述导轴由非钛基材料构成时,则所述导轴用镍-石墨涂层覆盖且所述套轴是由钛基材料制造的。
可替换地,若所述导轴由非钛基金属材料构成,所述叶片还可包括金属套圈。所述套圈表面有镍-石墨涂层且热缩在所述导轴上,而所述轴套用钛基材料制造。
在另一方案中,仍然对由非钛基金属材料制造的所述导轴而言,所述叶片还可包括用钛基和石墨基材料制造的套圈,所述套圈热缩在导轴上,而所述轴套用钛基材料制造。
不管选用什么样的实施例,在涂镍-石墨时可用热喷涂法喷涂镍基和石墨基粉末。
本发明还提供一种包括上述的诸多变斜度叶片的涡轮机压缩机和涡轮机。
附图说明
从涉及到附图的以下说明中可看出本发明的其他特征和优点,附图是实施例是非限制性的。附图中:
图1是本发明变斜度叶片的剖面图;及
图2是本发明另一实施例的变斜度叶片的不完整的剖面图。
具体实施方式
参看图1,涡轮机的高压压缩机的变斜度叶片2沿设置在各级动叶片(未示出)之间的环形静叶片级分布,所述动叶片固定在滑轮机转子(未示出)上。
环形级的每个变斜度叶片2的形状是机翼形4,其径向外端(或者叶片顶部)收尾于控制轴6(或者顶轴),其径向里端(或者叶根)与导轴8(或者底轴)相连。
控制轴6穿过涡轮机的定子外壳10且与控制叶片倾斜角的构件配合。为此,控制轴6的顶端12,与控制连杆14的一端接合,连杆的另一端与控制环16配合。
连杆14和控制环16形成叶片倾斜角的控制构件。绕涡轮机轴转动控制环16可转动控制连杆14,从而同时改变高压压缩机给定级中所有变斜度叶片2的倾斜角。
叶片的导轴8设计成能在构成轴支座的大致为圆柱形的中空轴套18中转动。每个轴套18被接纳在形成在涡轮机外壳的内环22中的凹座20内,所述轴套与所述凹座的形状基本上匹配。
根据本发明,轴套18和叶片导轴8之间的回转接触面是镍-石墨对钛类型的。
当轴套18和叶片的导轴8之间的回转接触面包括第一接触面和临近该第一接触面的第二接触面时,如果第一接触面由镍基和石墨基材料构成,第二接触而由钛基材料构成。则接触面称之为镍-石墨对钛类型的。
在套轴与导轴间作连续转动接触的使用条件下,由镍-石墨与钛构成的材料对从耐磨性高和摩擦系数低的角度看性能卓越。
轴套与导轴间的回转接触经历磨合期后,其特征在于NiGr和Ti表面上粗糙部分顶峰之间的初始摩擦力。该摩擦导致十分高的局部热量,尤其在钛表面上(它的导热系数低)。与NiGr共生的钛的极高温导致碳化钛(TiC)的形成,并涂覆在轴套与导轴之间的接触面上,从而确保有局部的高硬度,限制了接触表面的磨损。
业已对同样摩擦条件和同样工作期限的各对材料完成比较试验。下表是试验结果(观测的磨损的测量单位是任意的)。
NiGr的磨损量 | 对立面磨损量 | |
NiG与Waspalloy | 0.9 | 1 |
NiGr与Ta6v | 0.1 | 0.1 |
本试验中第一对材料使用的Waspalloy(沃斯巾洛依镍基高温耐蚀合金)是一种有名的镍基合金。本试验中第二对材料使用的钛TA6V是一种有名的镍基合金,内含铝和钒。
试验时观察到,轴套与叶片导轴间的接触面磨损极少(较之Waspalloy对材料的NiGr磨损量小9-10倍)。
本发明中可以设想,根据叶片及其导轴制作材料的不同,这种Ni-Gr与钛配对材料有多种实施方法。
因此,当叶片导轴8由钛基材料构成时,根据本发明轴套18,用镍基和石墨基材料构成。
在此实施例中,轴套的制造可将镍基和石墨基的粉末在模具中烧结而成。这种烧结法的一个例子称为金属粉末注射成形(Metal-Injection Molding,MIM):包括将镍和石墨基的粉末,与有机黏合剂一起注入模具中,一旦轴套成型后使用化学方法消除有机黏合剂。这种烧结法的另一个例子叫做电火花等离子烧结(Spark PlasmaSintering,SPS):与其它烧结法比较,本方法使用的热源来自通过加压器外壳的电流(因此能获得高的温升速度)。
当叶片的导轴由非钛基材料制造(如由钢基合金制造)时,则根据本发明,导轴可涂一层镍-石墨涂层,这对轴套18由钛基材料制造。
用热喷涂法将镍与石墨基的粉末热喷涂可使镍-石墨涂在叶片的导轴上。为此最好采用一滤筛,使喷涂的粉末的迹线与轴在撞击点处的切线的夹角小于45度左右,以确保粉末正确地黏附在轴上。
在图2所示的方案中,对非钛基金属材料制作的导轴8而言,本发明的叶片还包括金属套圈24,其上涂一层镍-石墨涂层且它热收缩在导轴上,这时轴套18由钛基材料构成。
在本实施例中,镍-石墨通过对镍和石墨基粉末的热喷涂涂覆在叶片的套圈24上。为此,最好用滤筛来确保喷涂的粉末的迹线与套圈在撞击点处的切线的夹角小于45度左右,以确保粉末正确地黏附在套圈上。
在图上未示的又一方案中,对于非钛基金属材料构成的导轴而言,本发明的叶片还包括一套圈,它是用镍和石墨材料制造且热缩在导轴上,这时轴套由钛基材料制造。
在这些情况下,套圈用上述的MIM或SPS法通过将镍和石墨基的粉末在模具中烧结而获得。
Claims (10)
1.一种涡轮机压缩机的变斜度叶片,该叶片包括安装在涡轮机外壳(22)中且成能绕所述叶片的导轴(8)回转的轴套(18),所述叶片的特征在于,所述轴套(18)与所疏导轴(8)之间的回转接触面是镍-石墨与钛类型的。
2.根据权利要求1所述的叶片,其中导轴(8)由钛基材料制造,所述叶片的特征在于,所述轴套(18)由镍和石墨基的材料构成。
3.根据权利要求2所述的叶片,其中所述轴套(18)通过将镍和石墨基的粉末在模具中烧结而成。
4.根据权利要求1所述的叶片,其中所述导轴(8)由非钛基金属材料构成,所述叶片的特征在于,所述导轴覆盖一层镍-石墨涂层,而所述轴套(18)由钛基材料构成。
5.根据权利要求1所述的叶片,其中所述导轴(8)由非钛基金属材料构成,所述叶片的特征在于,它还包括金属套圈(24),其上涂一层镍-石墨且其热缩在所述导轴上,所述轴套(18)由钛基材料构成。
6.根据权利要求1所述的叶片,其中所述导轴(8)由非钛基金属材料制造,所述叶片的特征在于,还包括由镍和石墨基的材料构成的套圈,所述套圈热缩在导轴上,所述轴套(18)由钛基材料构成。
7.根据权利要求6所述的叶片,其特征在于,所述套圈通过将镍和石墨基的粉末在模具中烧结而成。
8.根据权利要求4或5所述的叶片,其特征在于,所述镍-石墨是通过将镍和石墨基的粉末进行热喷涂而涂覆的。
9.一种涡轮机压缩机,其特征在于,包括许多片根据权利要求1至8所述的任一种变斜度叶片(2)。
10.一种涡轮机,其特征在于,它包括许多片根据权利要求1至8所述的任一种变斜度叶片(2)。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0650064 | 2006-01-06 | ||
FR0650064A FR2896012B1 (fr) | 2006-01-06 | 2006-01-06 | Dispositif anti-usure pour pivot de guidage d'aube a angle de calage variable de compresseur de turbomachine |
Publications (2)
Publication Number | Publication Date |
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CN1995763A true CN1995763A (zh) | 2007-07-11 |
CN1995763B CN1995763B (zh) | 2011-01-12 |
Family
ID=36481464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN2006101732286A Expired - Fee Related CN1995763B (zh) | 2006-01-06 | 2006-12-30 | 变斜度叶片及具有该叶片的涡轮机和其压缩机 |
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---|---|
US (1) | US20070160464A1 (zh) |
EP (1) | EP1806480B1 (zh) |
JP (1) | JP2007182885A (zh) |
CN (1) | CN1995763B (zh) |
CA (1) | CA2572859A1 (zh) |
DE (1) | DE602006005598D1 (zh) |
FR (1) | FR2896012B1 (zh) |
RU (1) | RU2420662C2 (zh) |
Cited By (6)
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CN102029390A (zh) * | 2010-12-27 | 2011-04-27 | 西安交通大学 | 一种薄壁变曲率空心叶片的制造方法 |
CN102037246A (zh) * | 2008-06-25 | 2011-04-27 | 斯奈克玛 | 向涡轮机压缩机环形空间喷入空气 |
CN102834622A (zh) * | 2010-04-14 | 2012-12-19 | 涡轮梅坎公司 | 涡轮发动机离心压缩机内气流的调整方法和实施所述方法的扩散器 |
CN102985640A (zh) * | 2010-07-08 | 2013-03-20 | 西门子公司 | 压缩机和相关联的燃气轮机 |
CN102076973B (zh) * | 2008-06-25 | 2013-10-30 | 斯奈克玛 | 涡轮机压缩机 |
CN112096658A (zh) * | 2020-11-06 | 2020-12-18 | 中国航发上海商用航空发动机制造有限责任公司 | 航空发动机压气机及其可调静子叶片位置保持结构 |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9353643B2 (en) * | 2007-04-10 | 2016-05-31 | United Technologies Corporation | Variable stator vane assembly for a turbine engine |
FR2964710B1 (fr) * | 2010-09-14 | 2012-08-31 | Snecma | Douille pour aube a calage variable |
DE102014205986B4 (de) | 2014-03-31 | 2021-03-18 | MTU Aero Engines AG | Leitschaufelkranz und Strömungsmaschine |
US10302011B2 (en) * | 2015-11-23 | 2019-05-28 | Garrett Transportation I Inc. | Exhaust gas variable turbine assembly |
DE102016210981A1 (de) * | 2016-06-20 | 2017-12-21 | Rolls-Royce Deutschland Ltd & Co Kg | Lagerelement und Turbomaschine mit einem Lagerelement |
FR3079553B1 (fr) * | 2018-03-30 | 2020-03-13 | Safran Aircraft Engines | Ensemble pour turbomachine |
US10830087B2 (en) * | 2018-12-10 | 2020-11-10 | Raytheon Technologies Corporation | Modular variable vane assembly |
US11346235B2 (en) | 2019-06-04 | 2022-05-31 | Raytheon Technologies Corporation | Bushing for variable vane in a gas turbine engine |
Family Cites Families (12)
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US2763519A (en) * | 1952-07-19 | 1956-09-18 | Gen Motors Corp | Powdered metal bearing |
JPS5934020A (ja) * | 1982-07-03 | 1984-02-24 | Ebara Corp | 組合せ摺動部材 |
FR2582720B1 (fr) * | 1985-05-29 | 1989-06-02 | Snecma | Procede de realisation de pivot d'aube de turbomachine et aube de stator le comportant |
US4790723A (en) * | 1987-01-12 | 1988-12-13 | Westinghouse Electric Corp. | Process for securing a turbine blade |
US4834613A (en) * | 1988-02-26 | 1989-05-30 | United Technologies Corporation | Radially constrained variable vane shroud |
US5302450A (en) * | 1993-07-06 | 1994-04-12 | Ford Motor Company | Metal encapsulated solid lubricant coating system |
JP3168538B2 (ja) * | 1997-04-19 | 2001-05-21 | チャン リー ウー | 滑りベアリング及びその製造方法 |
JPH11293368A (ja) * | 1998-04-07 | 1999-10-26 | Daido Metal Co Ltd | 銅系摺動合金 |
US6413043B1 (en) * | 2000-11-09 | 2002-07-02 | General Electric Company | Inlet guide vane and shroud support contact |
FR2853930B1 (fr) * | 2003-04-16 | 2007-02-23 | Snecma Moteurs | Dispositif de commande d'aubes a calage variable dans une turbomachine |
EP1524413A2 (en) * | 2003-10-15 | 2005-04-20 | United Technologies Corporation | Variable vane electro-graphitic bushing liner |
US20050084190A1 (en) * | 2003-10-15 | 2005-04-21 | Brooks Robert T. | Variable vane electro-graphitic bushing |
-
2006
- 2006-01-06 FR FR0650064A patent/FR2896012B1/fr not_active Expired - Fee Related
- 2006-12-18 DE DE602006005598T patent/DE602006005598D1/de active Active
- 2006-12-18 EP EP06126375A patent/EP1806480B1/fr active Active
- 2006-12-27 JP JP2006351054A patent/JP2007182885A/ja not_active Ceased
- 2006-12-28 RU RU2006147207/06A patent/RU2420662C2/ru active
- 2006-12-29 US US11/617,873 patent/US20070160464A1/en not_active Abandoned
- 2006-12-30 CN CN2006101732286A patent/CN1995763B/zh not_active Expired - Fee Related
-
2007
- 2007-01-02 CA CA002572859A patent/CA2572859A1/fr not_active Abandoned
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CN102037246A (zh) * | 2008-06-25 | 2011-04-27 | 斯奈克玛 | 向涡轮机压缩机环形空间喷入空气 |
CN102037246B (zh) * | 2008-06-25 | 2013-09-18 | 斯奈克玛 | 向涡轮机压缩机环形空间喷入空气 |
CN102076973B (zh) * | 2008-06-25 | 2013-10-30 | 斯奈克玛 | 涡轮机压缩机 |
CN102834622A (zh) * | 2010-04-14 | 2012-12-19 | 涡轮梅坎公司 | 涡轮发动机离心压缩机内气流的调整方法和实施所述方法的扩散器 |
CN102834622B (zh) * | 2010-04-14 | 2016-02-10 | 涡轮梅坎公司 | 涡轮发动机离心压缩机内气流的调整方法和实施所述方法的扩散器 |
CN102985640A (zh) * | 2010-07-08 | 2013-03-20 | 西门子公司 | 压缩机和相关联的燃气轮机 |
CN102985640B (zh) * | 2010-07-08 | 2015-10-21 | 西门子公司 | 压缩机和相关联的燃气轮机 |
CN102029390A (zh) * | 2010-12-27 | 2011-04-27 | 西安交通大学 | 一种薄壁变曲率空心叶片的制造方法 |
CN102029390B (zh) * | 2010-12-27 | 2012-05-23 | 西安交通大学 | 一种薄壁变曲率空心叶片的制造方法 |
CN112096658A (zh) * | 2020-11-06 | 2020-12-18 | 中国航发上海商用航空发动机制造有限责任公司 | 航空发动机压气机及其可调静子叶片位置保持结构 |
Also Published As
Publication number | Publication date |
---|---|
DE602006005598D1 (de) | 2009-04-23 |
EP1806480B1 (fr) | 2009-03-11 |
FR2896012B1 (fr) | 2008-04-04 |
EP1806480A1 (fr) | 2007-07-11 |
CN1995763B (zh) | 2011-01-12 |
RU2420662C2 (ru) | 2011-06-10 |
RU2006147207A (ru) | 2008-07-10 |
CA2572859A1 (fr) | 2007-07-06 |
JP2007182885A (ja) | 2007-07-19 |
US20070160464A1 (en) | 2007-07-12 |
FR2896012A1 (fr) | 2007-07-13 |
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