CN102434491A - Centrifugal compressor - Google Patents
Centrifugal compressor Download PDFInfo
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- CN102434491A CN102434491A CN2011102988252A CN201110298825A CN102434491A CN 102434491 A CN102434491 A CN 102434491A CN 2011102988252 A CN2011102988252 A CN 2011102988252A CN 201110298825 A CN201110298825 A CN 201110298825A CN 102434491 A CN102434491 A CN 102434491A
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- stator
- diffuser
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- impeller
- range missile
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Abstract
The invention provides a centrifugal compressor, which comprises an impeller supported in a housing to be rotated freely, and a diffuser consisting of plurality of guide vanes and positioned on the downstream side of the impeller. At least one short guide vane is arranged between two adjacent long guide vanes. The height of the short guide vane is configured to be increasing from the front edge to the rear edge thereof. Therefore, the rectifying function can be realized through the short guide vanes. Meanwhile, the friction force or the area of a flow path is reduced.
Description
Technical field
The present invention relates to a kind of centrifugal compressor, it possess in housing, be supported to rotation freely impeller and be configured in the multi-disc stator in the housing with the mode of surrounding aforementioned impeller.
Background technique
In centrifugal compressor in the past; Exist various forms of centrifugal compressors; In general centrifugal compressor, be provided with the diffuser that in housing, is supported to rotation centrifugal impeller freely, that be called as turbine and is disposed at its downstream side with the mode of surrounding this impeller.On this impeller, be provided with the fin that multi-disc is called as blade in periphery by the wheel hub of running shaft supporting.
Use this centrifugal compressor to make the mechanism of liquid pressure rise such as following illustrated.At first, will become of the inlet side suction of the fluid of compressed object through the impeller rotation from housing.At this moment, to the fluid that is inhaled in the housing energy is provided through the rotation of impeller.The fluid of emitting from impeller is slowed down by the diffuser of the downstream side that is disposed at impeller (outer circumferential side), and at this moment, the rotating energy that convection cell is provided converts the pressure rising energy of fluid into.Be compressed and fluid that boosts and then the gyrate vortex part that collects in its downstream side (outer circumferential side) like this, be supplied to necessary part.
In this diffuser,, then exist diffuser that does not have stator and the diffuser that is provided with stator if roughly distinguish.Generally speaking, though the former diffuser that does not have stator has the wide advantage of scope of the flow that can use, it is poor to be considered to efficient.On the other hand, though the narrow range of the flow that the latter's the diffuser that is provided with stator can use is considered to the efficient excellence.So, especially, propose to have various schemes about the latter's diffuser all the time.
The technology of being put down in writing for japanese kokai publication sho 53-119411 number proposes for the problem of the narrow range of the flow that can use that solves the diffuser that is provided with stator.Particularly, the length that has proposed stator for below 0.9 times of interval of this stator, be that the cover plate area is than (interval of the length/stator of stator) less centrifugal compressor.
Yet, be provided with stator diffuser, especially cover plate area than (interval of the length/stator of stator) less diffuser in, exist the problem that is easy to generate big noise.The technology that proposes in order to solve this technological problem is the technology that japanese is put down in writing for No. 3110205.
The technology that this japanese is put down in writing for No. 3110205 is such technology: centrifugal compressor possesses centrifugal impeller and comprises a pair of diffuser plate in the downstream side that is disposed at this impeller and the band vane diffuser of the stator that between this diffuser plate, is provided with circular fin row shape; In this centrifugal compressor; The stator of band vane diffuser is equated by leading-edge radius and the stator of long and short two kinds that length is different constitutes; And, between adjacent long stator, be provided with the short blade more than a slice.According to this technology; In the centrifugal compressor of such formation; Because inlet side at diffuser; The sheet number of stator is many, thus owing to the interference of diffuser and centrifugal impeller cause the outlet side of centrifugal impeller Zhou Fangxiang, be that the different property of the Flow Distribution of the fluid on the pitch direction of fin diminishes.Therefore, diminish owing to flow into the change of flowing of the fluid of diffuser, thus think by pressure oscillation cause fin diminish through the noise that frequency determined.
In the technology of No. 3110205 record of this japanese, the stator leading-edge radius of band vane diffuser equates, and the short-range missile leaf is located at the upstream side of diffuser.Yet; For the effect that is realized by the short-range missile leaf is rectified action, and the dwindling for the effect that is caused of the area of frictional force and stream, thus in the upstream side flow rate of fluid of diffuser than comparatively fast the increasing amount by the increase of dwindling the flow velocity that causes of the area of stream and the pitot loss that frictional force causes is bigger than the slippage of the pitot loss that rectified action realized.Therefore, the short-range missile leaf is disposed at the most deleterious impact of upstream side of diffuser.
Summary of the invention
The present invention wants to solve above-mentioned existing problem and proposes; Its problem is to provide a kind of centrifugal compressor, can realize by the rectified action that is disposed at the short-range missile leaf realization between the long stator effectively, reach the effect that is brought by the dwindling of area of frictional force and stream.
The present invention who solves above-mentioned problem is a kind of centrifugal compressor; Possess in housing, be supported to rotation freely impeller and in said housing, be disposed at the diffuser in the downstream side of said impeller with the mode of surrounding said impeller; Said diffuser has the multi-disc stator of devices spaced apart ground configuration; Wherein, said multi-disc stator is made up of long stator and short-range missile leaf, and said long stator is identical with said short-range missile leaf trailing edge radius and length is different; Between adjacent long stator, dispose a slice short-range missile leaf at least, the height of said short-range missile leaf constitutes from front edge side and uprises towards the trailing edge side.
According to centrifugal compressor of the present invention, because the trailing edge radius of long stator and short-range missile leaf is identical, thereby the short-range missile leaf is disposed at the more downstream side of diffuser.The rectified action that causes by the short-range missile leaf, and the dwindling of the area of frictional force and stream; Upstream side flow rate of fluid at diffuser plays detrimental effect soon and mostly, but flow rate of fluid is slow in the downstream side of diffuser, the boundary layer enlarges easily and cause and peel off.Therefore; Compare with the increase of dwindling the flow velocity that is caused of the area of the stream that produces owing to stator and the increasing amount of the pitot loss that frictional force caused; The slippage of peeling off the pitot loss that inhibition brings in the boundary layer that utilizes the rectified action of stator and realize is big, compares more advantageously with the situation that the short-range missile leaf is disposed at upstream side and works.So,, can embody the rectification effect of being realized by the short-range missile leaf more significantly through the short-range missile leaf being disposed at the downstream side of diffuser.
In addition; Because the short-range missile leaf itself constitutes from its front edge side and uprises towards the trailing edge side, thereby for embodying the favourable downstream side of rectified action, the height of stator is higher; Opposite lower at the height of disadvantageous upstream side stator; Less in the disadvantageous upstream side rectified action of rectified action, the downstream side rectified action favourable in rectified action is bigger, can further embody the rectification effect of short-range missile leaf more significantly.
Description of drawings
Fig. 1 is the drawing in side sectional elevation of the centrifugal compressor of expression an embodiment of the invention.
Fig. 2 is the part sectional arrangement drawing of the centrifugal compressor of this mode of execution of expression.
Fig. 3 is the plan view of configuration of stator of diffuser of the centrifugal compressor of this mode of execution of expression.
Fig. 4 is the plan view of configuration of the stator of the diffuser in the centrifugal compressor of expression different embodiment of the present invention.
Fig. 5 is the partial longitudinal section of the centrifugal compressor of expression another different embodiment of the present invention.
Embodiment
Below, based on mode of execution shown in the drawings the present invention is described in further detail.
For example; Like Fig. 1 ~ shown in Figure 3; The diffuser 4 that centrifugal compressor 1 of the present invention possesses roughly cone shape impeller 3 and is made up of multi-disc stator 5, wherein, the central authorities of impeller 3 in the housing 2 of hollow disc shape are to rotate freely by not shown bearing supporting; Be called as turbine, stator 5 disposes with the downstream side (outer circumferential side) of the impeller 3 of mode in housing 2 that surround this impeller 3 annularly.
To surround the mode of this impeller 3,, form diffuser 4 to dispose multi-disc stator 5 with the downstream side (outer circumferential side) of aforementioned hinder marginal part 3e mode in opposite directions in housing 2.In this stator 5, as shown in Figure 3, exist two kinds of different long stator 5a of length and short-range missile leaf 5b, the trailing edge radius of the trailing edge radius of the long stator 5a that these length are different and short-range missile leaf 5b is as being identical as that kind shown in the trailing edge radius R b.In addition, in this mode of execution of Fig. 1 ~ shown in Figure 3, these long stator 5a and short-range missile leaf 5b are every at a distance from a slice devices spaced apart and in housing 2, be configured to ring-type alternatively.Like this, because the trailing edge radius of long stator 5a and the trailing edge radius of short-range missile leaf 5b are identical trailing edge radius R b, thereby short-range missile leaf 5b is disposed at the downstream side of diffuser 4.
In addition, as shown in Figure 2, short-range missile leaf 5b constitutes from its front edge side and uprises highly at leisure towards the trailing edge side.On the other hand, long stator 5a is identical height from front edge side to trailing edge side.In addition, as shown in figures 1 and 3, these multi-disc stators 5 are with respect to the state configuration of circumferencial direction with roughly the same inclined at inclination angles.In addition, true dip direction and the true dip direction of the stator 5 that constitutes diffuser 4 of multi-disc fin 3b of being located at the impeller 3 of rotation is opposite directions, thereby the fluids of sending in the diffuser 4 through the rotation of impeller 3 are slowed down by stator 5.
And the downstream side (outer circumferential side) of the diffuser 4 in housing 2 is formed with gyrate scroll portion 2a.In addition, as shown in Figure 2 in this mode of execution, the sectional shape of scroll portion 2a is the circular shape, and is wideer than the space width in the diffuser 4.
Then, to the fluid experience that is taken into centrifugal compressor 1 what kind of through and boost and the situation that is supplied to necessary place at length describes by centrifugal compressor 1 of the present invention.
At first, the never illustrated motor of impeller 3, booster engine etc. are accepted rotating force and are rotated, thus the fluid that will become compressed object from the inlet side of the central authorities that are located at housing 2, be that the front edge 3c of impeller 3 sucks.At this moment, convection cell provides rotating energy through the rotation of impeller 3.The fluid of emitting from the hinder marginal part 3e of impeller 3 is admitted to the inside of the diffuser 4 in the downstream side (outer circumferential side) that is disposed at impeller 3.Because being located at true dip direction and the true dip direction of the stator 5 that constitutes diffuser 4 of multi-disc fin 3b of the impeller 3 of rotation is opposite direction, thereby send into fluids in the diffuser 4 because with stator 5 collisions and slowed down through the rotation of impeller 3.That is, the rotating energy that convection cell provides through the rotation of impeller 3 converts the pressure rising energy of fluid to by this diffuser 4, and fluid is compressed.
In the present invention, constitute in the stator 5 of diffuser 4, the trailing edge radius of the trailing edge radius of long stator 5a and short-range missile leaf 5b is identical trailing edge radius R b, thereby short-range missile leaf 5b is disposed at the downstream side of diffuser 4.Realize following action by this short-range missile leaf 5b: rectified action, and by the effect that causes of dwindling of the area of frictional force and stream.In the downstream side of diffuser 4, the flow rate of fluid that arrives here is slow, and the boundary layer of fluid enlarges easily and causes and peel off.But through short-range missile leaf 5b being disposed at the downstream side of this diffuser 4, can suppress peeling off of above-mentioned boundary layer through rectified action.In addition because flow velocity is slow, thereby can reduce friction and the area of stream dwindle the harmful effect that is caused.So,, can more effectively embody rectified action, and the effect dwindled of the area of frictional force and stream through short-range missile leaf 5b being disposed at the downstream side of diffuser 4.
In addition; Because short-range missile leaf 5b itself also constitutes from its front edge side and uprises towards the trailing edge side, thereby higher to the height of the favourable downstream side stator 5b of the embodiment of rectified action, opposite; Height at disadvantageous upstream side stator 5b is lower; Less in the disadvantageous upstream side rectified action of rectified action, the downstream side rectified action favourable in rectified action is bigger, thereby can further embody the rectification effect of short-range missile leaf 5b more significantly.Like this because the flow direction of the height longshore current body of short-range missile leaf 5b is changed, thereby can streamwise suitably adjust rectified action that short-range missile leaf 5b realized, and the area of frictional force or stream dwindle.
Thereby in this wise through diffuser 4 and be compressed the fluid that boosted after emitting, collect in the gyrate scroll portion 2a in the downstream side (outer circumferential side) that is formed at housing 2, be supplied to necessary part from diffuser 4.
Fig. 4 representes the configuration of the stator 5 of the diffuser 4 in the centrifugal compressor 1 of different embodiment of the present invention.In this embodiment; Unlike the long suchly stator 5a of mode of execution of Fig. 1 ~ shown in Figure 3 and short-range missile leaf 5b devices spaced apart and in housing 2, be configured to ring-type alternatively one by one, but long stator 5a and short-range missile leaf 5b are configured to ring-type between adjacent long stator 5a, 5a, to dispose the mode devices spaced apart of two short-range missile leaf 5b, 5b.Also can between adjacent long stator 5a, 5a, dispose multi-disc short-range missile leaf 5b in this wise.
Fig. 5 representes the centrifugal compressor 1 of another different embodiment of the present invention.In this embodiment, the height of short-range missile leaf 5b is not to constitute from its front edge side to uprise at leisure towards the trailing edge side, is tiny stepped and uprise towards the trailing edge side from front edge side but constitute ora terminalis.
Claims (1)
1. centrifugal compressor; Possess in housing, be supported to rotation freely impeller and in said housing, be disposed at the diffuser in the downstream side of said impeller with the mode of surrounding said impeller; Said diffuser is made up of the multi-disc stator of devices spaced apart ground configuration, in the said centrifugal compressor
Said multi-disc stator is made up of long stator and short-range missile leaf,
Said long stator is identical with said short-range missile leaf trailing edge radius and length is different,
Between adjacent long stator, dispose a slice short-range missile leaf at least,
The height of said short-range missile leaf constitutes from front edge side and uprises towards the trailing edge side.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-219512 | 2010-09-29 | ||
| JP2010219512A JP2012072735A (en) | 2010-09-29 | 2010-09-29 | Centrifugal compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102434491A true CN102434491A (en) | 2012-05-02 |
Family
ID=45982766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102988252A Pending CN102434491A (en) | 2010-09-29 | 2011-09-28 | Centrifugal compressor |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2012072735A (en) |
| CN (1) | CN102434491A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996521A (en) * | 2013-01-16 | 2013-03-27 | 于永海 | Pumping chamber of volute type mixed-flow pump |
| CN103727042A (en) * | 2013-12-13 | 2014-04-16 | 湖北省风机厂有限公司 | Sectional suction type vacuumizing centrifugal blower |
| CN111441993A (en) * | 2020-03-20 | 2020-07-24 | 中国科学院工程热物理研究所 | Adjustable camber reflux device suitable for multistage centrifugal compressor and control method thereof |
| CN111550448A (en) * | 2020-05-27 | 2020-08-18 | 江西省子轩科技有限公司 | Compressor or blower with diffuser |
| CN112196832A (en) * | 2020-10-26 | 2021-01-08 | 江苏大学 | Guide vane body with flow distribution sheet |
| CN113906222A (en) * | 2019-05-09 | 2022-01-07 | 诺沃皮尼奥内技术股份有限公司 | Stator blade for a centrifugal compressor |
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| JP2014047775A (en) * | 2012-09-04 | 2014-03-17 | Hitachi Ltd | Diffuser, and centrifugal compressor and blower including the diffuser |
| JP6109635B2 (en) * | 2013-04-30 | 2017-04-05 | 三菱重工業株式会社 | Diffuser processing method and diffuser adjustment method |
| WO2015061344A1 (en) | 2013-10-21 | 2015-04-30 | Williams International Co., L.L.C. | Centrifugal turbomachine diffuser with large vaneless portion upstream of a small vaned portion |
| CN105570191A (en) * | 2016-02-29 | 2016-05-11 | 珠海格力电器股份有限公司 | Centrifugal fan and air conditioner |
| CN110159538B (en) * | 2019-07-04 | 2020-07-28 | 华东交通大学 | Centrifugal pump device for water pipe system |
| CN110454440B (en) * | 2019-08-14 | 2022-05-20 | 山东明天机械集团股份有限公司 | Compressor for refrigeration cycle system |
| JP7288982B2 (en) * | 2020-01-07 | 2023-06-08 | 三菱重工エンジン＆ターボチャージャ株式会社 | turbine and turbocharger |
| CN113236607B (en) * | 2021-06-11 | 2022-06-28 | 浙江理工大学 | Design method of large-scale engineering pump volute and volute thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1716197A2 (en) * | 1989-07-17 | 1992-02-28 | Университет дружбы народов им.Патриса Лумумбы | Vane diffuser of centrifugal compressor |
| CN1071738A (en) * | 1991-10-21 | 1993-05-05 | 株式会社日立制作所 | Centrifugal compressor |
| JPH06288398A (en) * | 1993-04-07 | 1994-10-11 | Hitachi Ltd | Centrifugal compressor |
| US5709531A (en) * | 1993-04-28 | 1998-01-20 | Hitachi, Ltd. | Centrifugal compressor and vaned diffuser |
-
2010
- 2010-09-29 JP JP2010219512A patent/JP2012072735A/en active Pending
-
2011
- 2011-09-28 CN CN2011102988252A patent/CN102434491A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1716197A2 (en) * | 1989-07-17 | 1992-02-28 | Университет дружбы народов им.Патриса Лумумбы | Vane diffuser of centrifugal compressor |
| CN1071738A (en) * | 1991-10-21 | 1993-05-05 | 株式会社日立制作所 | Centrifugal compressor |
| JPH06288398A (en) * | 1993-04-07 | 1994-10-11 | Hitachi Ltd | Centrifugal compressor |
| US5709531A (en) * | 1993-04-28 | 1998-01-20 | Hitachi, Ltd. | Centrifugal compressor and vaned diffuser |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102996521A (en) * | 2013-01-16 | 2013-03-27 | 于永海 | Pumping chamber of volute type mixed-flow pump |
| CN102996521B (en) * | 2013-01-16 | 2015-06-10 | 于永海 | Pumping chamber of volute type mixed-flow pump |
| CN103727042A (en) * | 2013-12-13 | 2014-04-16 | 湖北省风机厂有限公司 | Sectional suction type vacuumizing centrifugal blower |
| CN113906222A (en) * | 2019-05-09 | 2022-01-07 | 诺沃皮尼奥内技术股份有限公司 | Stator blade for a centrifugal compressor |
| CN111441993A (en) * | 2020-03-20 | 2020-07-24 | 中国科学院工程热物理研究所 | Adjustable camber reflux device suitable for multistage centrifugal compressor and control method thereof |
| CN111550448A (en) * | 2020-05-27 | 2020-08-18 | 江西省子轩科技有限公司 | Compressor or blower with diffuser |
| CN111550448B (en) * | 2020-05-27 | 2021-10-29 | 江西省子轩科技有限公司 | Compressor or blower with diffuser |
| CN112196832A (en) * | 2020-10-26 | 2021-01-08 | 江苏大学 | Guide vane body with flow distribution sheet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2012072735A (en) | 2012-04-12 |
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Application publication date: 20120502 |