CN105201904A - Method for controlling tip clearance of semi-open impeller - Google Patents
Method for controlling tip clearance of semi-open impeller Download PDFInfo
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- CN105201904A CN105201904A CN201510556996.9A CN201510556996A CN105201904A CN 105201904 A CN105201904 A CN 105201904A CN 201510556996 A CN201510556996 A CN 201510556996A CN 105201904 A CN105201904 A CN 105201904A
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- impeller
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- coating
- tip clearance
- slip ring
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Abstract
The invention innovatively provides a method for controlling tip clearance of a semi-open impeller. The method comprises steps as follows: (1), the axial deformation delta D at the maximum diameter of the impeller is firstly calculated; (2), an impeller cover surface curve S1 of the impeller is deviated for a distance delta D in the axial direction, and a curve S2 is obtained; (3), the curve S2 obtained through deviation is outwards moved for 1 mm equidistantly, and a curve S3 is obtained and is an internal surface contour processing curve of a collector base body; (4), a protective coating is formed on the internal surface of the processed collector through electrostatic spraying, the thickness of the coating is 1 mm, the coating is resistant to the temperature of 260 DEG C, and the curve of the internal surface of the collector finally formed after coating spraying is S2. The method has the benefits as follows: after the collector and the impeller are assembled, the impeller initially rotates and rubs with the coating, a trace of coating is scraped, then, friction between blades and the coating is prevented, and tiny tip clearance is kept.
Description
Technical field
The invention belongs to impeller field, especially relates to a kind of controlling method of half-opened impeller blade tip clearance.
Background technique
The constituent elements of the Fan Equipment such as centrifugal blower, compressor comprises impeller, slip ring (induction chamber), Diffuser, spiral case etc.Wherein slip ring and impeller are as inspiratory component, and their fit up gap directly can affect fan efficiency.Slip ring internal surface coordinates with the wheel capping of impeller, takes Spielpassung between slip ring and impeller, and Conventional wisdom requires blade tip clearance to control within 5 percent of impeller outlet width.Due to machining error and assembly error, blade tip clearance is usually excessive, and cause gap to be revealed increasing, impeller boost capability weakens, pressure ratio declines, and fan efficiency reduces.
Summary of the invention
The problem that the invention will solve reduces the gap between blade and slip ring.
For solving the problems of the technologies described above, the technological scheme that the invention adopts is:
A controlling method for half-opened impeller blade tip clearance, comprises the following steps:
(1) geomery of impeller is determined in design;
(2) the axial deflection △ D at impeller maximum diameter place is calculated;
(3) the wheel cap surface curve S1 of impeller is offset vertically the distance of △ D, obtain curve S 2;
(4) curve S 2 skew obtained vertically outside equidistant mobile 1mm obtains curve S 3, using the inner surface profile Processing Curve of curve S 3 as slip ring matrix;
(5) to processing the slip ring internal surface sprayed protection coating obtained, coating thickness 1mm, after making spray-on coating, the final slip ring internal surface curve formed is S2.
Preferably, in step (1), △ D adopts finite element software simulation calculation to obtain.
Preferably, the protective coating taked in step (5) is polytetrafluorethylecoatings coatings, adopts electrostatic spraying mode.
The advantage that the invention has and good effect are:.
(1) after slip ring and impeller assemble, impeller initially rotate will with coating friction, scrape off micro-coating, rear blade and coating no longer rub, and keep minimum blade tip clearance;
(2) when impeller generation axial float and radial vibration, coating can available protecting impeller and slip ring not damaged, and coating can spray after damaging again, reduces maintain and replace cost;
(3) coating is blade position skew vertically, can ensure that blade tip clearance is uneven when assembling, namely impeller air inlet side gap is little, side clearance of giving vent to anger is large, deform after impeller High Rotation Speed, air inlet side amount of deformation is little, and initial stage side amount of deformation is large, makes amount of deformation effectively compensate for fit up gap.
Accompanying drawing explanation
In order to be illustrated more clearly in the invention embodiment or technological scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only the embodiment of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of impeller in the present invention;
Fig. 2 is the assembling schematic diagram of impeller and slip ring in the present invention;
Fig. 3 is the assembling schematic diagram in the present invention after slip ring increase coating;
Fig. 4 is the partial schematic diagram of Fig. 3 floating coat part of the present invention;
Fig. 5 is blade cutting coating schematic diagram in the present invention.
In figure:
1, slip ring 2, impeller 3, coating
Embodiment
Below in conjunction with the accompanying drawing in the invention embodiment, be clearly and completely described the technological scheme in the invention embodiment, obviously, described embodiment is only the invention part embodiment, instead of whole embodiments.Based on the embodiment in the invention, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the invention protection.
Set forth a lot of detail in the following description so that fully understand the invention, but the invention can also adopt other to be different from alternate manner described here to implement, those skilled in the art can when doing similar popularization without prejudice to when the invention intension, and therefore the invention is by the restriction of following public specific embodiment.
Secondly; the invention is described in detail in conjunction with schematic diagram; when describing the invention embodiment in detail; for ease of explanation; the sectional drawing of indication device part structure can be disobeyed general ratio and be made partial enlargement; and described schematic diagram is example, it should not limit the scope of the invention protection at this.In addition, the three-dimensional space of length, width and height should be comprised in actual fabrication.
As depicted in figs. 1 and 2, the internal surface of slip ring 1 coordinates with the wheel capping of impeller 2, takes Spielpassung between slip ring 1 and impeller 2, and Conventional wisdom requires blade tip clearance to control within 5 percent of impeller 2 exit width B.The method in the past adopted is towards outer equidistant formation slip ring internal surface by the wheel cap of impeller.Can be there is axis and radial deformation in impeller, and suction port place amount of deformation is less than the amount of deformation of air outlet in high-speed rotation.Due to distortion during impeller High Rotation Speed, air inlet side gap increases, and outlet side gap reduces, and the blade tip clearance of blade is in axial direction uneven.Slip ring after equidistant will ensure that fit up gap is greater than impeller amount of deformation, otherwise vane tip and slip ring internal surface can be caused to rub, and damages impeller and slip ring, therefore can there is comparatively wide arc gap between existing technology lower blade and slip ring.
The object of the invention is to reduce blade tip clearance, blade tip clearance is controlled in 0.05mm, improve the pressure ratio of impeller and the efficiency of blower fan.If meet accident play during impeller High Rotation Speed simultaneously, as axial movement value < 1mm, protection impeller and slip ring can not be damaged because of contact friction.As shown in Figure 3,4, the method that the present invention adopts comprises the following steps:
(1) geomery of impeller is determined in design;
(2) the axial deflection △ D at impeller maximum diameter place is calculated;
(3) the wheel cap surface curve S1 of impeller is offset vertically the distance of △ D, obtain curve S 2;
(4) curve S 2 skew obtained vertically outside equidistant mobile 1mm obtains curve S 3, using the inner surface profile Processing Curve of curve S 3 as slip ring matrix;
(5) spray the protective coating such as polytetrafluorethylecoatings coatings, coating thickness 1mm, heatproof 260 DEG C to processing the slip ring internal surface obtained, after making spray-on coating, the final slip ring internal surface curve formed is S2.
In step (1), △ D adopts ansys finite element software simulation calculation to obtain.
Impeller 2 and slip ring 1 are metal material, if rub when impeller 2 High Rotation Speed, the large calorimetric that friction generates causes damage to both.Adopt slip ring internal surface to increase the method for coating 3 in the present invention, avoid impeller 2 directly to contact with slip ring 1.When blower fan runs first, impeller 2 rotational deformation, blade and slip ring coating 3 rub, and because coating 3 hardness is far below impeller 2 hardness, coating 3 is wiped off by blade, form chip, with fluid expulsion, reach and closely cooperate between coating 3 and impeller 2.After blower fan runs well, impeller 2 just and between slip ring coating 3 no longer rubs, and gap minimally simultaneously.
Described protective coating can adopt other soft metal coating etc.
Can be there is axis and radial deformation when High Rotation Speed in impeller, the axial deflection △ d of any point, radial-deformation △ r on blade curve, total deformation is △ L, as shown in Figure 5, and △ L > △ d, therefore can there is micro-friction with coating in blade, and the coating amount of being cut is
wherein,
because radial-deformation △ r is very little, therefore △ t is very little.
According to this programme, when impeller generation axial float and radial vibration, coating can available protecting impeller and slip ring not damaged, and coating can spray after damaging again, reduces maintain and replace cost; Coating is blade position skew vertically, and can ensure that blade tip clearance is uneven when assembling, namely impeller air inlet side gap is little, side clearance of giving vent to anger is large, and deform after impeller High Rotation Speed, air inlet side amount of deformation is little, initial stage side amount of deformation is large, makes amount of deformation effectively compensate for fit up gap.
Above an embodiment of the invention has been described in detail, but described content being only the preferred embodiment of the invention, the practical range for limiting the invention can not being considered to.All equalization changes done according to the invention application range with improve, within the patent covering scope that still all should belong to the invention.
Claims (3)
1. a controlling method for half-opened impeller blade tip clearance, is characterized in that: comprise the following steps:
(1) geomery of impeller is determined in design;
(2) the axial deflection △ D at impeller maximum diameter place is calculated;
(3) the wheel cap surface curve S1 of impeller is offset vertically the distance of △ D, obtain curve S 2;
(4) curve S 2 skew obtained vertically outside equidistant mobile 1mm obtains curve S 3, using the inner surface profile Processing Curve of curve S 3 as slip ring matrix;
(5) to processing the slip ring internal surface sprayed protection coating obtained, coating thickness 1mm, after making spray-on coating, the final slip ring internal surface curve formed is S2.
2. the controlling method of half-opened impeller blade tip clearance according to claim 1, is characterized in that: in step (1), △ D adopts finite element software simulation calculation to obtain.
3. the controlling method of half-opened impeller blade tip clearance according to claim 1, is characterized in that: the protective coating taked in step (5) is polytetrafluorethylecoatings coatings, adopts electrostatic spraying mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556996.9A CN105201904B (en) | 2015-09-02 | 2015-09-02 | A kind of control method of half-opened impeller blade tip clearance |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510556996.9A CN105201904B (en) | 2015-09-02 | 2015-09-02 | A kind of control method of half-opened impeller blade tip clearance |
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| CN105201904A true CN105201904A (en) | 2015-12-30 |
| CN105201904B CN105201904B (en) | 2017-07-28 |
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| CN201510556996.9A Active CN105201904B (en) | 2015-09-02 | 2015-09-02 | A kind of control method of half-opened impeller blade tip clearance |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108331767A (en) * | 2018-02-06 | 2018-07-27 | 湖北汽车工业学院 | The analogy method and simulator that blade tip clearance influences auto pump pressure fluctuation |
| CN110036208A (en) * | 2017-02-08 | 2019-07-19 | 三菱重工发动机和增压器株式会社 | Compressor and turbocharger |
| CN112824685A (en) * | 2019-11-21 | 2021-05-21 | 泛仕达机电股份有限公司 | Centrifugal impeller with efficiency improving device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4093401A (en) * | 1976-04-12 | 1978-06-06 | Sundstrand Corporation | Compressor impeller and method of manufacture |
| CN2874088Y (en) * | 2005-12-20 | 2007-02-28 | 上海连成（集团）有限公司 | Open impeller gap regulator |
| WO2009041844A1 (en) * | 2007-09-26 | 2009-04-02 | Balakirev, Evgeny Borisovitch | Fan unit with a free radial fan impeller |
| CN203214437U (en) * | 2013-03-01 | 2013-09-25 | 重庆通用工业(集团)有限责任公司 | Centrifugal blower current collector adjusting device |
| CN203670241U (en) * | 2013-12-23 | 2014-06-25 | 湘潭高新区风动机械有限公司 | Centrifugal ventilator |
| CN204419678U (en) * | 2015-01-22 | 2015-06-24 | 长沙鼓风机厂有限责任公司 | Blower |
-
2015
- 2015-09-02 CN CN201510556996.9A patent/CN105201904B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4093401A (en) * | 1976-04-12 | 1978-06-06 | Sundstrand Corporation | Compressor impeller and method of manufacture |
| CN2874088Y (en) * | 2005-12-20 | 2007-02-28 | 上海连成（集团）有限公司 | Open impeller gap regulator |
| WO2009041844A1 (en) * | 2007-09-26 | 2009-04-02 | Balakirev, Evgeny Borisovitch | Fan unit with a free radial fan impeller |
| CN203214437U (en) * | 2013-03-01 | 2013-09-25 | 重庆通用工业(集团)有限责任公司 | Centrifugal blower current collector adjusting device |
| CN203670241U (en) * | 2013-12-23 | 2014-06-25 | 湘潭高新区风动机械有限公司 | Centrifugal ventilator |
| CN204419678U (en) * | 2015-01-22 | 2015-06-24 | 长沙鼓风机厂有限责任公司 | Blower |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110036208A (en) * | 2017-02-08 | 2019-07-19 | 三菱重工发动机和增压器株式会社 | Compressor and turbocharger |
| CN110036208B (en) * | 2017-02-08 | 2021-05-28 | 三菱重工发动机和增压器株式会社 | Centrifugal compressor and turbocharger |
| CN108331767A (en) * | 2018-02-06 | 2018-07-27 | 湖北汽车工业学院 | The analogy method and simulator that blade tip clearance influences auto pump pressure fluctuation |
| CN108331767B (en) * | 2018-02-06 | 2020-06-05 | 湖北汽车工业学院 | Simulation method and simulation device for influence of blade tip clearance on pressure pulsation of automobile water pump |
| CN112824685A (en) * | 2019-11-21 | 2021-05-21 | 泛仕达机电股份有限公司 | Centrifugal impeller with efficiency improving device |
| CN112824685B (en) * | 2019-11-21 | 2022-08-09 | 泛仕达机电股份有限公司 | Centrifugal impeller with efficiency improving device |
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| Publication number | Publication date |
|---|---|
| CN105201904B (en) | 2017-07-28 |
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