CN110081026A - It is a kind of for weakening the entry guide vane and adjusting method of centrifugal compressor blade-tip leakage flow - Google Patents
It is a kind of for weakening the entry guide vane and adjusting method of centrifugal compressor blade-tip leakage flow Download PDFInfo
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- CN110081026A CN110081026A CN201910408970.8A CN201910408970A CN110081026A CN 110081026 A CN110081026 A CN 110081026A CN 201910408970 A CN201910408970 A CN 201910408970A CN 110081026 A CN110081026 A CN 110081026A
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- Prior art keywords
- guide vane
- additional guide
- leaf
- centrifugal compressor
- height
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Classifications
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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
- F04D27/002—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying geometry within the pumps, e.g. by adjusting vanes
-
- 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
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
- F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a kind of for weakening the entry guide vane and adjusting method of centrifugal compressor blade-tip leakage flow, including the leading leaf that can rotate and Additional guide vane；The week that Additional guide vane is installed on centrifugal compressor air intake duct closes；Additional guide vane has close leaf top part and constitutes close to two parts of leaf root part；The height relationships of the height of Additional guide vane and leading leaf are as follows: 0.02≤a1/b≤0.3,0.02≤a2/b≤0.3, wherein a1 is the height of the Additional guide vane close to leaf top part, and a2 is the height of the Additional guide vane close to leaf root part, and b is the height of main guide vane.The present invention, which flows the semi-open type region Centrufugal compressor impeller Ye Ding using the method for part addition Additional guide vane, carries out local modulation, it is easy to accomplish.The present invention, so as to improve impeller flow regime, can effectively promote compressor performance by exerting one's influence to blade-tip leakage flow.The present invention merely adds Additional guide vane, change is smaller, easy to spread compared to existing entry guide vane adjusting method.
Description
[technical field]
The invention belongs to centrifugal compressor technical field, be related to it is a kind of for weaken centrifugal compressor blade-tip leakage flow into
Mouth guide vane and adjusting method.
[background technique]
Centrifugal compressor is because many advantages, such as its reliability is high, small in size, light-weight, is in aerospace, energy source and power, stone
The industries such as oiling work and metallurgy occupy an important position.In practical application, centrifugal compressor be frequently not operate in it is a certain specific
Operating point but operate within the scope of certain flow, centrifugal compressor steady running condition range be evaluation compressor performance
One important indicator.Centrifugal compressor is set economy with higher and to widen centrifugation pressure in whole service operating condition in order to reach
The purpose of contracting machine steady running condition, wherein variable inlet guide vane adjusting is the angle of change air inlet to realize that operating condition is adjusted, this
Kind regulative mode has the advantages that structurally simple, economical property height, adjustment process do not need to shut down.
The advantages of semi-open type centrifugal compressor has both open type and closed centrifugal compressor due to it, so application range is more
Extensively.But the impeller due to semi-open type centrifugal compressor is with wheel cap that there are gaps, inevitably generates leaf in the process of running
Tip leakage flow is pushed up, blade-tip leakage flow exacerbates the complexity flowed in runner, influences the efficiency and pressure ratio of centrifugal compressor, and
The stable operation of compressor is had an important influence on.
[summary of the invention]
It is an object of the invention to overcome the above-mentioned prior art, provide a kind of for weakening centrifugal compressor leaf top
The entry guide vane and adjusting method of leakage stream, in order to achieve the above objectives, the present invention is achieved by the following scheme:
It is a kind of for weakening the entry guide vane of centrifugal compressor blade-tip leakage flow, including the leading leaf that can rotate and attached
Add guide vane；Additional guide vane is installed on the peripheral wall of centrifugal compressor air intake duct；Additional guide vane has close leaf top part and close to leaf
Two parts of root portion are constituted；The height relationships of the height of Additional guide vane and leading leaf are as follows: 0.02≤a1/b≤0.3,0.02≤
A2/b≤0.3, wherein a1 is the height of the Additional guide vane close to leaf top part, and a2 is the height of the Additional guide vane close to leaf root part
Degree, b are the height of main guide vane.
A further improvement of the present invention lies in that:
The number of blade of Additional guide vane and leading leaf is no less than 5.
A kind of adjusting method weakening centrifugal compressor blade-tip leakage flow using entry guide vane, comprising the following steps:
When needing that operating status is adjusted, leading leaf and Additional guide vane are rotated respectively；When flow is less than design stream
When amount, part is identical as leading leaf rotation angle on Additional guide vane, and lower part is rotated along impeller direction of rotation；When flow be greater than etc.
When design discharge, partial turn angle identical with leading leaf under Additional guide vane, upper part rotates identical side with leading leaf
To differing 25 °~40 ° with leading leaf；
Itself further improvement is that
Additional guide vane rotational angle is between -90 °~90 °, when Additional guide vane rotational angle is opposite with impeller direction of rotation
When angle be negative value, otherwise be positive value.
Compared with prior art, the invention has the following advantages:
Leakage stream near centrifugal compressor leaf top is mainly the driving by blade pressure surface and suction surface static pressure difference, blade
The static pressure of Surface Static Pressure and inlet air flow is closely related, therefore can be quiet to change inlet air flow by improving entry guide vane form
Pressure value, and then reduce blade surface static pressure difference and achieve the purpose that weakening blade-tip leakage flow promotes compressor performance.The present invention utilizes
The method of part addition Additional guide vane, which flows the semi-open type region Centrufugal compressor impeller Ye Ding, carries out local modulation, is easy to real
It is existing.The present invention, so as to improve impeller flow regime, can effectively promote compressor by exerting one's influence to blade-tip leakage flow
Energy.The present invention merely adds Additional guide vane, change is smaller, easy to spread compared to existing entry guide vane adjusting method.Most
Afterwards, Additional guide vane structure of the present invention is simple, and easy to process, cost is relatively low.
[Detailed description of the invention]
Fig. 1 is the schematic diagram of one embodiment of the invention；
Fig. 2 is the circumferential perspective view that one embodiment of the invention is applied on semi-open type centrifugal compressor；
Fig. 3 is the exhibition of the entry guide vane exit static pressure circumferential direction average value of one embodiment of the invention to distribution map, and flow is
6.5kg/s；
Fig. 4 is that the primary blades blade-tip leakage flow amount of one embodiment of the invention flows to distribution map, flow 6.5kg/s；
Fig. 5 is that the splitterr vanes blade-tip leakage flow amount of one embodiment of the invention flows to distribution map, flow 6.5kg/s；
Fig. 6 is the compressor stage performance chart of one embodiment of the invention；Wherein, (a) be using different guide vanes from
Heart compressor stage polytropic efficiency is (b) the centrifugal compressor stage overall pressure tatio for using different guide vanes, (c) uses for low flow rate condition
The centrifugal compressor stage overall pressure tatio of different guide vanes uses the changeable effect of centrifugal compressor stage of different guide vanes (d) for low flow rate condition
Rate.
Wherein, 1- Fighter Inlet；Molded line at the top of 2- air intake duct；3- dominates leaf；4- Additional guide vane；5- air intake duct bottom-type
Line；6- centrifugal impeller；7- wheel cap；8- diffuser；The gas outlet 9-；10- wheel disc.
[specific embodiment]
In order to enable those skilled in the art to better understand the solution of the present invention, below in conjunction in the embodiment of the present invention
Attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described embodiment is only
The embodiment of a part of the invention, the embodiment being not all of, and it is not intended to limit range disclosed by the invention.In addition, with
In lower explanation, descriptions of well-known structures and technologies are omitted, obscures concept disclosed by the invention to avoid unnecessary.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment should fall within the scope of the present invention.
The various structural schematic diagrams for disclosing embodiment according to the present invention are shown in the attached drawings.These figures are not in proportion
It draws, wherein some details are magnified for the purpose of clear expression, and some details may be omitted.As shown in the figure
The shape in various regions, layer and relative size, the positional relationship between them out is merely exemplary, in practice may be due to
Manufacturing tolerance or technical restriction and be deviated, and those skilled in the art may be additionally designed as required have not
Similar shape, size, the regions/layers of relative position.
In context disclosed by the invention, when one layer/element is referred to as located at another layer/element "upper", the layer/element
Can may exist intermediate layer/element on another layer/element or between them.In addition, if in a kind of court
One layer/element is located at another layer/element "upper" in, then when turn towards when, the layer/element can be located at another layer/
Element "lower".
It should be noted that description and claims of this specification and term " first " in above-mentioned attached drawing, "
Two " etc. be to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that using in this way
Data be interchangeable under appropriate circumstances, so as to the embodiment of the present invention described herein can in addition to illustrating herein or
Sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that cover
Cover it is non-exclusive include, for example, the process, method, system, product or equipment for containing a series of steps or units are not necessarily limited to
Step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, product
Or other step or units that equipment is intrinsic.
The invention will be described in further detail with reference to the accompanying drawing:
Referring to Fig. 1 and Fig. 2, tandem entry guide vane of the present invention, including (Additional guide vane is divided into leading leaf 3 with Additional guide vane 4
Two parts, one is proximate to molded line 2 at the top of air intake duct, and two be proximate to air intake duct bottom molded line 5)；Leading leaf 3 and Additional guide vane 4
It can turn an angle；To height difference, the height a of Additional guide vane 4 and leading leaf 3 are high for the exhibition of leading leaf 3 and Additional guide vane 4
The relationship spent between b is 0.02≤a1/b≤0.3, and 0.02≤a2/b≤0.3, Additional guide vane 4 is installed on air intake duct peripheral wall, additional
Guide vane 4 divides for close to leaf top part and close to leaf root part；Leading the distance between leaf 3 and Additional guide vane 4 and circumferentially opposed position
It sets related to specific centrifugal compressor model；The number of blade of Additional guide vane 4 and leading leaf 3 is true by specific compressor parameter
It is fixed, general no less than 5.
A kind of tandem entry guide vane adjusting method weakening blade-tip leakage flow, comprising the following steps:
When being equipped with the semi-open type centrifugal compressor operation of tandem entry guide vane, when needing that operating status is adjusted
When, leading leaf 3 and Additional guide vane 4 are turned an angle respectively.When flow is less than design discharge, part on Additional guide vane 4
Identical as leading leaf 3 rotation angle, lower part turns an angle along impeller direction of rotation；When flow is more than or equal to design discharge
When, the lower partial turn angle identical with leading leaf 3 of Additional guide vane 4, upper part is adjusted the angle according to specific compressor model,
Its optimal angle is related with specific compressor, generally rotates identical direction with leading leaf 3, differed with leading leaf 3 25 °~
40°。
Wherein, it is different from the angle that Additional guide vane 4 rotates to dominate leaf 3, i.e., generates non-uniform inlet air flow upwards in exhibition
Angle, (angle is negative 4 rotational angle of Additional guide vane when guide vane rotational angle is opposite with impeller direction of rotation between -90 °~90 °
Value, otherwise be positive value), the rotational angle of leading leaf 3 is determined with the pressure ratio that centrifugal compressor needs to reach.
Different centrifugal compressors and guide vane when specific operation, Additional guide vane 4 select different rotation angle and height with
It is optimal effect.
When adjusting, leading leaf 3 plays main function, and primarily serving for Additional guide vane 4 improves semi-open type centrifugal compressor leaf
The effect of the local flow state in wheel blade top region.
The principle of the present invention and the course of work:
The present invention carries out local directed complete set using flow regime of the Additional guide vane to the region Centrufugal compressor impeller Ye Ding, improves
Centrifugal compressor performance.When centrifugal compressor being adjusted using the present invention, dominates leaf 3 and Additional guide vane 4 can be around each
The shaft that spins rotation is transported semi-open centrifugal impeller 6 (blade root is integrated with wheel disc 10, and Ye Dingyu wheel cap 7 has certain gap)
During row, leading leaf 3 and Additional guide vane 4 are rotated into certain angle respectively when needing to adjust, dominate leaf in the present embodiment
Inverse impeller direction of rotation rotates 15 °, and the inverse impeller direction of rotation in part (solid line) rotates 55 ° on Additional guide vane, lower part (dotted line)
It is identical as leading leaf rotational angle, Additional guide vane height a1=0.15b, a2=0.2b.The gas in centrifugal compressor operational process
Body enters from Fighter Inlet 1, followed by leading leaf 3 and Additional guide vane 4, generates the deflecting action (gas at top to air-flow
Air-flow angle is first changed by leading leaf 3, air-flow angle is further changed by Additional guide vane 4, avoids and once changes larger air-flow
Biggish flow losses caused by angle.), so that the flow direction of air-flow is generated variation, gas enters centrifugal impeller 6 and expands later
Depressor 8 is finally flowed out from gas outlet 9.Each component part design parameter in the embodiment is shown in the paper that this seminar has delivered
(Jiayi Zhao,Zhiheng Wang,Guang Xi,et al.Investigation of Performance and Flow
Field of a Centrifugal Compressor Under Negative Pre-Swirl[C]；proceedings of
the ASME Turbo Expo 2015:Turbine Technical Conference and Exposition,F,
2015.).When air-flow flows through Additional guide vane 4, due to the 15% of the highly only leading leaf of Additional guide vane 4, and deflection angle compared with
Greatly, so that the fluid at leaf top further deflects, this results in flow-deviation angle degree in exhibition to becoming uneven.Leaf top nearby compared with
Big deflection angle can make air-flow generate biggish circumferential component velocity, and variation of flow regime drives rest part gas at this
Flowing velocity increase, to reduce the static pressure in 4 exit of Additional guide vane, as shown in figure 3, gas enters after centrifugal impeller 6,
Due to the reduction of static pressure, 6 blade pressure surface of centrifugal impeller and suction surface static pressure difference are reduced, and then reduce blade-tip leakage flow amount.
The reduction of leaf top leakage rate improves the flow regime near 6 leaf top of centrifugal impeller, reduces the low regime Ye Ding, and at impeller
The improvement of flow regime can reduce the flow losses in alumnus's component diffuser 8, and then improve compressor performance, from Fig. 6
(a) and (b) is it can be seen that use the compressor overall pressure tatio of series connection guide vane and the more original only leading leaf of polytropic efficiency against impeller
The case where direction of rotation rotates 15 ° is obviously improved especially in big flow operating condition, it can have increase blocking with reasonable expectation
The ability of flow.
When centrifugal compressor operates in low flow rate condition (being less than design discharge), it can be seen that use Additional guide vane and list
Solely using leading leaf performance boost very little, this is because when small flow near leaf top it is biggish it is negative prewhirl caused by loss of incidence compared with
Greatly.So low flow rate condition, by the upper partial turn of Additional guide vane 4 and leading leaf equal angular, lower part is in the present embodiment
15 ° are rotated along impeller direction of rotation.This mainly increases the static pressure at blade suction surface blade root, the blade suction surface in small flow
Top gas is gas transport at blade root, therefore increases static pressure at suction surface leaf top, to reduce pressure face and inhale
The static pressure difference in power face, and then leakage rate is reduced, centrifugal compressor performance is improved, it is this as shown in (c) and (d) in Fig. 6
The smaller advantage of regulative mode flow is more obvious.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (4)
1. a kind of for weakening the entry guide vane of centrifugal compressor blade-tip leakage flow, which is characterized in that including what can be rotated
Leading leaf (3) and Additional guide vane (4)；Additional guide vane (4) is installed on the peripheral wall of centrifugal compressor air intake duct；Additional guide vane (4)
There is close leaf top part and is constituted close to two parts of leaf root part；The height of Additional guide vane (4) and the height of leading leaf (3) are closed
System are as follows: 0.02≤a1/b≤0.3,0.02≤a2/b≤0.3, wherein a1 is the height of the Additional guide vane close to leaf top part, a2
For close to the height of the Additional guide vane of leaf root part, b is the height of main guide vane.
2. according to claim 1 for weakening the entry guide vane of centrifugal compressor blade-tip leakage flow, which is characterized in that attached
Guide vane (4) and the number of blade of leading leaf (3) is added to be no less than 5.
3. a kind of adjusting method for weakening centrifugal compressor blade-tip leakage flow using entry guide vane, which is characterized in that including following
Step:
When needing that operating status is adjusted, leading leaf (3) and Additional guide vane (4) are rotated respectively；When flow is less than design
When flow, part is identical as leading leaf (3) rotation angle on Additional guide vane (4), and lower part is rotated along impeller direction of rotation；Work as stream
When amount is more than or equal to design discharge, partial turn and leading leaf (3) identical angle under Additional guide vane (4), upper part with it is leading
Leaf (3) rotates identical direction, differs 25 °~40 ° with leading leaf (3).
4. the adjusting method according to claim 3 for weakening centrifugal compressor blade-tip leakage flow using entry guide vane, special
Sign is that Additional guide vane (4) rotational angle is between -90 °~90 °, when Additional guide vane rotational angle and impeller direction of rotation phase
Inverse time angle is negative value, otherwise is positive value.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910408970.8A CN110081026B (en) | 2019-05-16 | 2019-05-16 | Inlet guide vane for weakening leakage flow at blade top of centrifugal compressor and adjusting method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910408970.8A CN110081026B (en) | 2019-05-16 | 2019-05-16 | Inlet guide vane for weakening leakage flow at blade top of centrifugal compressor and adjusting method |
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| Publication Number | Publication Date |
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| CN110081026A true CN110081026A (en) | 2019-08-02 |
| CN110081026B CN110081026B (en) | 2020-05-22 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692131A (en) * | 2020-06-22 | 2020-09-22 | 北京稳力科技有限公司 | Compressor and inlet guide vane device thereof |
| CN111734683A (en) * | 2020-07-03 | 2020-10-02 | 宁波工程学院 | Method for inhibiting tip leakage vortex and centrifugal compressor |
| CN114483629A (en) * | 2022-01-13 | 2022-05-13 | 江苏海拓宾未来工业科技集团有限公司 | Multi-shaft multi-stage high-speed centrifugal compressor for hydrogen fuel |
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| JPH10331792A (en) * | 1997-06-03 | 1998-12-15 | Ishikawajima Harima Heavy Ind Co Ltd | Structure of intake part of centrifugal compressor |
| CN1203320A (en) * | 1997-06-23 | 1998-12-30 | 运载器有限公司 | Free rotor stabilization |
| DE59808172D1 (en) * | 1997-05-28 | 2003-06-05 | Ksb Ag | CENTRIFUGAL PUMP WITH INLET CONTROL DEVICE |
| CN103398024A (en) * | 2013-08-15 | 2013-11-20 | 西安胜唐鼓风机有限公司 | Inlet guide device of sintering machine |
| EP3018361A1 (en) * | 2013-07-04 | 2016-05-11 | Mitsubishi Heavy Industries, Ltd. | Centrifugal compressor |
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Patent Citations (5)
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| DE59808172D1 (en) * | 1997-05-28 | 2003-06-05 | Ksb Ag | CENTRIFUGAL PUMP WITH INLET CONTROL DEVICE |
| JPH10331792A (en) * | 1997-06-03 | 1998-12-15 | Ishikawajima Harima Heavy Ind Co Ltd | Structure of intake part of centrifugal compressor |
| CN1203320A (en) * | 1997-06-23 | 1998-12-30 | 运载器有限公司 | Free rotor stabilization |
| EP3018361A1 (en) * | 2013-07-04 | 2016-05-11 | Mitsubishi Heavy Industries, Ltd. | Centrifugal compressor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111692131A (en) * | 2020-06-22 | 2020-09-22 | 北京稳力科技有限公司 | Compressor and inlet guide vane device thereof |
| CN111734683A (en) * | 2020-07-03 | 2020-10-02 | 宁波工程学院 | Method for inhibiting tip leakage vortex and centrifugal compressor |
| CN114483629A (en) * | 2022-01-13 | 2022-05-13 | 江苏海拓宾未来工业科技集团有限公司 | Multi-shaft multi-stage high-speed centrifugal compressor for hydrogen fuel |
| CN114483629B (en) * | 2022-01-13 | 2023-07-28 | 江苏海拓宾未来工业科技集团有限公司 | Multi-shaft multi-stage hydrogen fuel high-speed centrifugal compressor |
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| Publication number | Publication date |
|---|---|
| CN110081026B (en) | 2020-05-22 |
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