CN104975948B - 增压设备的转子 - Google Patents
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- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
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- F01D11/00—Preventing or minimising internal leakage of working-fluid, e.g. between stages
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- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
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- F02B33/32—Engines with pumps other than of reciprocating-piston type
- F02B33/34—Engines with pumps other than of reciprocating-piston type with rotary pumps
- F02B33/40—Engines with pumps other than of reciprocating-piston type with rotary pumps of non-positive-displacement type
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- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/024—Units comprising pumps and their driving means the driving means being assisted by a power recovery turbine
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
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- 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
- F04D29/08—Sealings
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- F04D29/00—Details, component parts, or accessories
- F04D29/58—Cooling; Heating; Diminishing heat transfer
- F04D29/582—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps
- F04D29/5853—Cooling; Heating; Diminishing heat transfer specially adapted for elastic fluid pumps heat insulation or conduction
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
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- F04D29/00—Details, component parts, or accessories
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
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- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
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Abstract
本发明涉及增压设备(2)的转子(1)、尤其废气涡轮增压器的转子(1),具有紧固在其上的压缩机轮(3)和涡轮机轮(4),其中转子(1)在至少一个纵向端部包括用于径向空气轴承的盆状轴承衬套(7)。本发明重要的是,在该情况下轴承衬套(7)包括至少一个中空空间(8)和延伸至所述中空空间(8)的多个加强肋(9)。由此,能够创建具有改进固有频率的较轻转子(1)。
Description
技术领域
本发明涉及增压设备的转子、尤其废气涡轮增压器的转子。本发明还涉及具有这种转子的增压设备。
背景技术
从DE10 2012 202 272 A1公知一种通用增压设备的转子,具有紧固至彼此的至少两个部件,它们一起围成中空空间。两个部件在该情况下经由中空空间的负压(尤其经由真空)紧固至彼此。公知转子经由轴承衬套被支撑,轴承衬套沿着侧向布置于其两端部侧。
从DE10 2008 057 729 A1公知一种用于内燃机的废气涡轮增压器,尤其用于机动车辆,其中转子支撑在定子中。为了能够实现特别低的摩擦轴承,在操作期间,气动径向轴承被转子气动地施加负荷。
从DE1 575 700 A1还公知一种气体润滑的废气涡轮增压器。
用于废气涡轮增压器的公知转子的缺点在于,它们通常由实心轴形成,相对重。如果相反采用中空轴承衬套用于径向空气轴承,它们会轻些,但是也会相对软,结果是,不利地削弱了转子的固有频率。
发明内容
本发明因此要解决的问题是,提供通用类型转子的改进或者至少可替换的实施例,其特征在于改善了转子的固有频率。
本发明是基于这样的总体构思:加固或者加强转子的盆状轴承衬套,每个盆状轴承衬套依靠加强肋被径向空气轴承沿侧向支撑在端部,加强肋延伸入相应轴承衬套的中空空间中。根据本发明的转子在该情况下包括紧固在其上的压缩机轮以及涡轮机轮,以及至少在一个纵向端部包括先前提到的用于径向空气轴承的盆状轴承衬套,其中,该轴承衬套具有至少一个中空空间以及延伸至中空空间的多个加强肋。因为轴承衬套的中空实施例,轴承衬套一方面是轻的,这在废气涡轮增压器用在机动车辆中时是尤其有利的。另一方面,加强肋增加了盆状轴承衬套的力度,结果是,显著改善了转子固有频率。利用根据本发明的转子,转子固有频率能够实现得高于转子的旋转速度。为了进一步增加转子固有频率,能够降低转子在端部处的重量,依靠此,通过加强能够防止轴承衬套的变形。
实际上,轴承衬套的面壁被增强。因而经增强的面壁再次加强了轴承衬套,并且贡献于有利地影响转子固有频率。在该情况下增强面壁能够通过凸形隆起实现。
在根据本发明的方案的有利进一步发展中,加强肋与轴承衬套形成为一个件,使得轴承衬套和加强肋由一个件生成,即“一次铸造”。这在生产轴承衬套方面尤其提供了优势,因为无需额外组装加固肋或加强肋。
实际上,设置了多个中空空间以及多个加强肋,它们通过轴向平行镗孔生产。轴承衬套因而最初生产为实心轮廓,其中,中空空间以及限定各中空空间的加强肋由随后引入的镗孔生产。此处,镗孔需要明显地于轴承衬套的轴线对称地分布,以便稍后在操作期间即转子旋转期间不会创建不平衡。以这种方式生产的轴承衬套在生产时还是成本有效的,具有高质量。显而易见还可想到的是,中空空间大致通过侵蚀处理生产,结果是,同样能够实现轴承衬套的成本有效的生产。
在根据本发明方案的进一步有利实施例中,转子的压缩机轮和涡轮机轮均具有面向彼此的中央凹槽,其中,在压缩机轮和涡轮机轮之间布置密封盘,密封盘同样具有这种中央凹槽。同时,压缩机轮、密封盘和涡轮机轮通过中央螺栓螺栓于一起,其中,密封盘以及压缩机轮中的中央凹槽例如形成为通路开口,而涡轮机轮中的凹槽形成为螺栓开口。由此能够从压缩机轮的后面,即从其轴承衬套,将用于三个部件彼此连接的螺栓插过压缩机轮和密封盘并将螺栓拧入涡轮机轮。这使得能够将这三个部件夹紧至彼此。转子的这种螺栓连接尤其提供的主要优势是,能够易于更换其各部件,例如因磨损布置在中间的密封盘。
应该理解的是,以上提到的以及以下仍解释的特征不仅能够使用在相应的组合状态,还能够使用成其他组合或者它们本身,这不脱离本发明的范围。
附图说明
本发明的优选示范实施例示出于附图中并且更详细地解释在以下说明中,其中,相同参考标记涉及相同或者类似或者功能相同的部件。
在每个情况下示意地示出了:
图1是根据本发明的转子的截面图,轴承衬套位于涡轮机轮的区域中,
图2是类似图1的视图,但是具有不同构造的轴承衬套,
图3是图2的轴承衬套的局部截面图和视图,
图4是类似图1的视图,但是轴承衬套能够螺接在其中,
图5是轴承衬套能够螺接其上的视图。
具体实施方式
根据图1、图2和图4,根据本发明的增压设备2(尤其废气涡轮增压器)的转子1仅示意地绘出,包括间接紧固在其上的压缩机轮3以及涡轮机轮4。在压缩机轮3和涡轮机轮4之间布置密封盘5,密封盘5具有多个环形密封鳍件或者迷宫状件6。密封盘5优选地由钛材料生产,这最小化了从涡轮机轮4至压缩机轮3的热传递。在涡轮机轮侧,设置用于径向空气轴承的盆状轴承衬套7,其包括至少一个中空空间8和延伸至该中空空间的多个加强肋9。在其面壁10上,轴承衬套7能够具有轴向轴承表面,尤其凹槽式轴向空气轴承。
通过轴承衬套7的中空设计,轴承衬套7能够形成为相对轻的,即重量小,尤其在机动车辆中的增压设备2中使用转子1方面具有优势。由于额外设置的加强肋9,能够尤其在径向方向上显著增加轴承衬套7的强度,这同样对于转子1的具转子固有频率有正效应。在根据本发明的转子1的情形下,经由转子1的旋转速度能够增加转子固有频率,使得在废气涡轮增压器的操作期间永不会达到转子固有频率,因此不会发生固有频率问题。为了进一步增加转子固有频率,能够降低转子在端部处的重量,依靠此,通过加强防止了轴承衬套7的变形。
根据图1和图2,轴承衬套7在该情况下仅设置在涡轮侧,其中,显而易见还可想到的是,这种轴承衬套7可仅设置在压缩机侧,或者设置在这两侧。
观看轴承衬套7的面壁10,图1示出的轴承衬套7明显的是,其具有凸形隆起从而被增强,这对轴承衬套7的强度以及硬度同样具有正效应。图1示出的加强肋9设计为环形并且朝向内侧以接头状突入中空空间8。通常,图1的轴承衬套7仅具有单个中空空间8。
不同于图1的轴承衬套7,图2的轴承衬套7包括多个中空空间8和多个加强肋9,它们通过轴向平行镗孔11生产(尤其见图3)。除了通过钻孔来生产中空空间8,它们显而易见地还能够通过侵蚀处理来生产。
再一次观看图1和图2,显然,压缩机轮3和涡轮机轮4均具有面向彼此的中央凹槽12,正如密封盘5位于压缩机轮3和涡轮机轮4之间。转子1的所有三个部件即压缩机轮3、涡轮机轮4和密封盘5在该情况下螺栓于一起,即通过中央螺栓13紧固至彼此。通过拧开中央螺栓13,可容易地实现拆开转子1,尤其例如用于更换各部件,诸如例如密封盘5。在该情况下拧紧螺栓13从压缩机侧执行,为此目的移除轴承衬套7。
轴承衬套7环形地密封连接至涡轮机轮4,尤其例如焊接、钎焊、设定或者胶合。密封盘5具有相对的两个环形台阶14和14’,其中,具有环形边缘15’的压缩机轮3接合其中的一个台阶,而具有环形边缘15的涡轮机轮4接合另一环形台阶14。
根据图4示出的实施例,其中轴承衬套7螺接至涡轮机轮4。为了该目的,轴承衬套7包括外螺纹16,涡轮机轮4具有互补地关联内螺纹17(还见图5)。因此,为了拆卸转子1,轴承衬套7首先需要被拧开以使得能够访问螺栓13。为了节约重量,图4和图5示出的轴承衬套7还具有中空空间8。
在进一步实施例中,图4中的螺栓13和轴承衬套7能够形成为一个件,使得转子1的三个部件即压缩机轮3、涡轮机轮4和密封盘5通过附接轴承衬套7而螺接至彼此,即紧固至彼此。
利用根据本发明的转子1,能够在径向方向上以高强度实现转子1处径向空气轴承。为了该目的,径向轴承元件(具体来说即轴承衬套7)包括多个加强肋9,多个加强肋9接合在轴承衬套7的至少一个中空空间8中或者限定多个这些中空空间8。由于加强肋9,还额外地降低了轴承衬套7在高转子旋转速度的情形下的变形趋势。加强肋9同样对转子1的转子固有频率具有有利效应。
利用根据本发明的转子1,尤其,转子固有频率能够高于转子1的旋转速度,使得转子仅在子关键范围内转动。这主要是通过位于外侧且硬度增加的轴承来实现的。
Claims (10)
1.一种增压设备(2)的转子(1),具有紧固在其上的压缩机轮(3)和涡轮机轮(4),其中,转子(1)在至少一个纵向端部包括用于径向空气轴承的盆状轴承衬套(7),其特征在于,
所述轴承衬套(7)包括至少一个中空空间(8)和延伸至所述中空空间(8)的多个加强肋(9);
-所述压缩机轮(3)和所述涡轮机轮(4)均包括面向彼此的中央凹槽(12),
-在所述压缩机轮(3)和所述涡轮机轮(4)之间布置密封盘(5),所述密封盘(5)也具有中央凹槽(12),
-所述压缩机轮(3)、所述密封盘(5)和所述涡轮机轮(4)通过中央螺栓(13)螺接至彼此。
2.根据权利要求1所述的转子,其特征在于,
所述轴承衬套(7)的面壁(10)被增强。
3.根据权利要求1或2所述的转子,其特征在于,
所述加强肋(9)设计为环形并且以接头状突入所述中空空间(8)。
4.根据权利要求1或2所述的转子,其特征在于,
设置多个中空空间(8)和多个加强肋(9),它们通过轴向平行镗孔(11)产生。
5.根据权利要求1或2所述的转子,其特征在于,
所述轴承衬套(7)和所述中央螺栓(13)形成为一个件。
6.根据权利要求5所述的转子,其特征在于,
所述密封盘(5)包括形成迷宫状密封件的环形密封鳍件(6)。
7.根据权利要求1或2所述的转子,其特征在于,
所述轴承衬套(7)环形地密封连接至所述压缩机轮(3)或者所述涡轮机轮(4)。
8.根据权利要求1或2所述的转子,其特征在于,
所述密封盘(5)包括相对定位的两个环形台阶(14、14’),其中,具有环形边缘(15’)的所述压缩机轮(3)接合在其中的一个环形台阶中,而具有环形边缘(15)的所述涡轮机轮(4)接合在其中的另一个环形台阶中。
9.根据权利要求1或2所述的转子,其特征在于,
所述轴承衬套(7)螺接至所述压缩机轮(3)或者所述涡轮机轮(4)。
10.一种增压设备(2),具有根据权利要求1至9中任一项所述的转子(1)。
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DE102010006716A1 (de) * | 2009-02-10 | 2010-08-12 | Bosch Mahle Turbo Systems Gmbh & Co. Kg | Ladeeinrichtung |
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CN101715509A (zh) * | 2007-05-24 | 2010-05-26 | 林登迈尔股份有限公司 | 涡轮增压器ⅱ |
CN101932808A (zh) * | 2008-08-28 | 2010-12-29 | 三菱重工业株式会社 | 可变容量排气涡轮的制造方法 |
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CN102301111A (zh) * | 2009-01-12 | 2011-12-28 | Eco汽车国际公司 | 电控涡轮增压器的改进 |
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