CN1045812C - 具有稳定和加强结构的旋转式压缩机 - Google Patents
具有稳定和加强结构的旋转式压缩机 Download PDFInfo
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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
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/02—Surge control
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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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
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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
- F04D29/16—Sealings between pressure and suction sides
- F04D29/161—Sealings between pressure and suction sides especially adapted for elastic fluid pumps
- F04D29/162—Sealings between pressure and suction sides especially adapted for elastic fluid pumps of a centrifugal flow wheel
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
- F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
- F04D29/685—Inducing localised fluid recirculation in the stator-rotor interface
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S415/00—Rotary kinetic fluid motors or pumps
- Y10S415/914—Device to control boundary layer
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Abstract
一种压缩机装置,该装置包括一壳体(12),一可在壳体(12)内旋转的叶轮(22),该叶轮包括一毂(24)和从毂(24)延伸的叶片(30),一环(40)转绕叶片(30)的前沿边并与壳体(12)上的槽(42)一起,在两者之间形成一间隙,该间隙大于叶片(30)自由边与壳体(12)的共形部分之间的间隙。这一结构可以允许气体在环(40)周围自由流动以扩大压缩机叶轮的工作范围。环(40)同时有增加叶片(30)的强度的作用,因此毂(24)的厚度可以降低,从而进一步扩大了压缩机叶轮的工作范围。
Description
本发明涉及一种旋转式压缩机,具体说涉及一种具有稳定结构的旋转式压缩机。
旋转式压缩机一般包括一安装在旋转轴上的可旋转的叶轮。该叶轮上装有若干叶片。叶片装在轮毂上以便使之在壳体内旋转。通过叶轮的转动,气体,通常是大气空气,通过外壳上的进口被吸进壳内,然后通过一扩压器而进入一围绕叶轮的涡壳通道。在涡轮增压器的情况下,压缩机的顺叶轮可以由涡轮转动或者在增压器或压气机的情况下,采用直接的机械驱动装置。空气从涡壳通道排出以便为使用这种装置的内燃机的进气歧管提供增压空气。然而,这种压缩机叶轮只在一比较狭的工作范围内才是稳定的。如果压缩机叶轮工作在这个范围以外,即在通常所谓的喘振区工作,就会带来具有危险的不稳定性。
因此,人们希望能在保持最大气体动力效率的同时,扩大压缩机叶轮的工作范围。美国专利4743161号中揭示了一种提高压缩机叶轮的工作范围的方法。该专利中所提出的压缩机轮沿壳体的周围具有按圆周间隔排列的空气口或开孔以允许双方向气流进入压缩机叶片的上游和下游侧边之间的压缩机叶轮的区域,这样的结构布置,使叶轮结构复杂化,从而制作较麻烦。
在欧洲专利EP-0348674A1中揭示了一种具有稳定结构的离心式压缩机,所述稳定结构包括一稳定槽、一稳定环和若干稳定叶片组成;所述稳定环是设置在所述稳定凹槽内,位于叶轮之前和输送介质主流动之外,而所述若干叶片是安装在所述稳定环的外周上并紧固在所述凹槽内。这样的布置虽然可使压缩机处于小流量即部分负荷下抑制喘振现象以获得较稳定的流动特性,从而扩大其工作范围,但是其结构比较复杂,即稳定环与稳定叶片和槽之间的固定关系较复杂,且稳定环外径与叶轮进口外径要保持精确比例,因而加工制造工艺较烦复;另外叶轮的叶片并未采用加强结构,从而叶轮的毂的尺寸就较大,这样实际上还不能有效地完全避免小负荷时的喘振现象。
因此,为克服上述已有技术中所存在的不足之处,本发明的目的是提供一种具有结构简单但可有效消除低负荷喘振现象以稳定工作,从而扩大有效工作范围的稳定装置的旋转式压缩机。
为实现上述目的,本发明提供一种具有稳定和加强结构的旋转式压缩机,它包括一具有一进口的壳体,所述壳体上形成一圆周方向延伸的槽;一在壳体内可旋转地安装着的叶轮,所述叶轮包括一可以绕旋转轴线旋转的毂,和从所述毂向外延伸的叶片;所述叶片具有一自由边,所述壳体包括一与所述自由边一部分基本上共形的共形部分,两者配合在它们之间形成一第一间隙;以及一环,该槽围绕所述环,所述槽与所述环一起在其间形成所述第二间隙;其中,所述环围绕所述叶片的所述自由边的前沿边部分设置,并可与所述叶片一起相对于所述壳体旋转;所述共形部分延伸过所述环以形成一与自由边和共形部分之间的第一间隙连通的气流通路。
由于该环有加强叶片强度的作用,因此轮毂的面积可以缩小,从而可以减小喘振范围。壳体上有一条槽围绕在环的四周,在槽的底部和环之间形成一个间隙,此间隙大于叶片自由边及共形壁之间的间隙,从而扩大了已有技术的工作范围而用不着在壳体壁上提供对空气动力学来说产生扰动的孔或开口。
本发明的这些和别的特点通过下面结合附图所作的描述将变得更为明显。附图中:
图1是按照本发明的旋转式压缩机的截面图;
图2是图1中画有圈圈的那一部分的放大图。
现请参阅图1及图2。图中用编号10表示的是采用本发明的压缩机。此压缩机包括一形成气体进口区域14的壳体12,一共壁部分16,一扩压区18和一轮出的涡壳20,此涡壳20围绕着图中用编号22表示的压缩机叶轮。如果压缩机10是用于压缩来自大气的空气为发动机提共增压空气的,则气体进口14通过一通常的空气滤清器(图中未画出)与周围大气相通。被压缩的大气空气,在经过压缩机叶轮22之后,排入涡壳20,此涡壳20与内燃机(图中未画出)进气歧管相连,由此压缩机10向内燃机提供增压空气。
压缩机轮22包括一具有轮廓线的毂24,该轮廓有一沿圆周延伸的外曲面26。该压缩机轮安装在轴28上。如果压缩机装置10是一废气驱动的涡轮增压器的一部分,则有一透平叶轮(图中未画出)安装在轴28的另一端,以本技术领域的技术人员所熟知的方式使轴28转动。本技术领域的人也都知道,轴28也可以由机械装置驱动,例如由传动带传动。
多个沿圆周间隔设置的叶片30从毂24的表面26伸出,叶片30具有使空气动力效率达到最大的构形。每一叶片30有一在图中用编号32表示的自由边缘,自由边缘32包括一进口边缘部分34,进入空气进气口14的空气撞击在它的上面,一出口边缘分36,它面向扩压器18,该自由边并与壳体12的共形壁16的形状相一致,从而在两者之间形成一个间隙。
在叶片30的自由边32上固定着一作圆周延伸的环40,此环从前沿边部分34作轴向延伸(相对于旋转轴28。为了达到空气动力的最大的效率,环40的厚度以及环40的轴向长度应根据叶片的门计而定,与此同时,应保证环40有足够的刚度以使它同时具有增强叶片30的强度的功能。如果轮22是铸造的,则环40可以铸成叶轮的一部分,然后进行机加工。在壳体12的共形壁16的一部分上表成有一作圆周形延伸的槽42,它基本上与轴28的旋转轴线是同轴的。槽42的深度要安排得使槽42的沿圆周延伸的壁44及外圆周表面46之间的间隙大于叶片边缘和壁之间的间隙。这种安排的优点是,在高流速运行时,气流可以从入口14流过环40的圆周延伸的表面46,进入叶片30的自由边部分38和壳体共形部分16之间的间隙,而在低流速运行时,则气流可以从叶片及壁之间的间隙进入进气口。这种气流的双向流动,比之已有技术在共形壁部分16形成沿圆周间隔的孔以及稳定环完全设置在槽内的结构具有可以扩大工作范围的优点。由于环有加强强度的作用,毂24的厚度可以比具有同样功能的压缩机的厚度为小。
Claims (4)
1.一种具有稳定和加强结构的旋转式压缩机,它包括一具有一进口的壳体(12),所述壳体(12)上形成一圆周方向延伸的槽(42);一在壳体(12)内可旋转地安装着的叶轮(22),所述叶轮(22)包括一可以绕旋转轴线旋转的毂(24),和从所述毂(24)向外延伸的叶片(30);所述叶片(30)具有一自由边(32),所述壳体(12)包括一与所述自由边(32)一部分基本上共形的共形部分(16),两者配合在它们之间形成一第一间隙;以及一环(40),该槽(42)围绕所述环(40),所述槽(42)与所述环(40)一起在其间形成所述第二间隙;其特征在于,所述环(40)围绕所述叶片(30)的所述自由边(32)的前沿边部分设置,并可与所述叶片(30)一起相对于所述壳体(12)旋转;所述共形部分(16)延伸过所述环(40)以形成一与自由边(32)和共形部分(16)之间的第一间隙连通的气流通路。
2.如权利要求1所述的旋转式压缩机,其特征在于,所述第二间隙大于所述第一间隙。
3.如权利要求1所述的旋转式压缩机,其特征在于,所述槽和所述环(40)有一段与所述毂(24)的旋转轴平行延伸的长度,所述槽的长度要大于所述环(40),以便足以允许气体通过所述第二间隙在所述环(40)周围流动。
4.如权利要求1所述的旋转式压缩机,其特征在于,所述槽有一相对于所述旋转轴作径向延伸的深度,所述槽的深度至少形成所述第二间隙的一部分。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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US07/916,660 US5304033A (en) | 1992-07-20 | 1992-07-20 | Rotary compressor with stepped cover contour |
US916,660 | 1992-07-20 |
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CN1083183A CN1083183A (zh) | 1994-03-02 |
CN1045812C true CN1045812C (zh) | 1999-10-20 |
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CN93108530A Expired - Fee Related CN1045812C (zh) | 1992-07-20 | 1993-07-14 | 具有稳定和加强结构的旋转式压缩机 |
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US (1) | US5304033A (zh) |
EP (1) | EP0651859B1 (zh) |
JP (1) | JPH07509039A (zh) |
KR (1) | KR950702682A (zh) |
CN (1) | CN1045812C (zh) |
DE (1) | DE69305082T2 (zh) |
WO (1) | WO1994002742A1 (zh) |
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FI69683C (fi) * | 1982-02-08 | 1986-03-10 | Ahlstroem Oy | Centrifugalpump foer vaetskor innehaollande fasta aemnen |
SU1326776A1 (ru) * | 1986-03-03 | 1987-07-30 | И. К. Попов | Центробежна турбомашина |
CH675279A5 (zh) * | 1988-06-29 | 1990-09-14 | Asea Brown Boveri |
-
1992
- 1992-07-20 US US07/916,660 patent/US5304033A/en not_active Expired - Lifetime
-
1993
- 1993-07-14 CN CN93108530A patent/CN1045812C/zh not_active Expired - Fee Related
- 1993-07-15 JP JP6504006A patent/JPH07509039A/ja active Pending
- 1993-07-15 WO PCT/US1993/006654 patent/WO1994002742A1/en active IP Right Grant
- 1993-07-15 KR KR1019950700222A patent/KR950702682A/ko not_active Application Discontinuation
- 1993-07-15 EP EP93917196A patent/EP0651859B1/en not_active Expired - Lifetime
- 1993-07-15 DE DE69305082T patent/DE69305082T2/de not_active Expired - Fee Related
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3893787A (en) * | 1974-03-14 | 1975-07-08 | United Aircraft Corp | Centrifugal compressor boundary layer control |
EP0034674A1 (en) * | 1980-02-26 | 1981-09-02 | West & Son Engineers Limited | A device for supporting and sealing a spherical member |
US4743161A (en) * | 1985-12-24 | 1988-05-10 | Holset Engineering Company Limited | Compressors |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104595240A (zh) * | 2013-10-31 | 2015-05-06 | 曼柴油机和涡轮机欧洲股份公司 | 径向压缩机 |
Also Published As
Publication number | Publication date |
---|---|
US5304033A (en) | 1994-04-19 |
WO1994002742A1 (en) | 1994-02-03 |
JPH07509039A (ja) | 1995-10-05 |
EP0651859A1 (en) | 1995-05-10 |
KR950702682A (ko) | 1995-07-29 |
DE69305082D1 (de) | 1996-10-31 |
DE69305082T2 (de) | 1997-02-06 |
CN1083183A (zh) | 1994-03-02 |
EP0651859B1 (en) | 1996-09-25 |
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