EP2891873B1 - Dispositif de support pour correction d'équilibre - Google Patents
Dispositif de support pour correction d'équilibre Download PDFInfo
- Publication number
- EP2891873B1 EP2891873B1 EP13833183.0A EP13833183A EP2891873B1 EP 2891873 B1 EP2891873 B1 EP 2891873B1 EP 13833183 A EP13833183 A EP 13833183A EP 2891873 B1 EP2891873 B1 EP 2891873B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mandrel
- rotor
- outer peripheral
- support
- aerostatic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000002093 peripheral effect Effects 0.000 claims description 22
- 239000012530 fluid Substances 0.000 claims description 7
- 238000003780 insertion Methods 0.000 claims description 2
- 230000037431 insertion Effects 0.000 claims description 2
- 230000008878 coupling Effects 0.000 description 7
- 238000010168 coupling process Methods 0.000 description 7
- 238000005859 coupling reaction Methods 0.000 description 7
- 230000000694 effects Effects 0.000 description 7
- 230000003068 static effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 230000013011 mating Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D5/00—Blades; Blade-carrying members; Heating, heat-insulating, cooling or antivibration means on the blades or the members
- F01D5/02—Blade-carrying members, e.g. rotors
- F01D5/027—Arrangements for balancing
Definitions
- the present invention relates to a support apparatus for balance correction for rotatably supporting a rotating body using a vertical mandrel having an aerostatic bearing in order to correct the balance of the rotating body rotating at high speeds such as a turbocompressor rotor.
- a support apparatus for balance correction
- a support apparatus for rotatably supporting the rotor alone using a mandrel having an aerostatic bearing.
- most of the support apparatuses have a structure such that as the mandrel, there is used a cylindrical mandrel member which is fitted into a support hole with a circular cross section located at a rotation axis portion of the rotor, aerostatic radial bearings (each having radial bearing surface including a jet hole) are provided on an outer peripheral surface of the mandrel member, and aerostatic thrust bearings (each having a thrust bearing surface including a jet hole) are provided on the base end side of the mandrel member.
- the structure When the mandrel is fitted into the support hole of the rotor, the structure allows the entire rotor to be mounted on the mandrel. Then, compressible fluid (air for aerostatic bearings) is jetted onto internal surfaces of the support hole through the jet holes of the aerostatic radial bearings, and compressible fluid (air for aerostatic bearings) is jetted onto the periphery of the opening (end surface of the rotor) at the lower end of the support hole through the jet holes of the aerostatic thrust bearings, whereby the rotor is rotatably supported around the mandrel in a floating state.
- compressible fluid air for aerostatic bearings
- the amount of imbalance is measured by applying rotational force to the rotor in the floating state from outside, such as by jetting air for drive (drive fluid) onto the rotor surface, to rotate the rotor at high speeds, and then using various sensors provided in the balance correction apparatus to measure the behavior of the rotating rotor.
- Patent Document 1 Japanese Patent Laid-Open No. 2005-172538 ( Figure 5 )
- the support hole of the rotor is generally a hole having a cylindrical shape with a circular cross section, that is, a circular cross section in an entire axial direction. The reason for this is to fittingly insert the end of the shaft mating with the rotor into the support hole and to couple the shaft with the rotor by bolts or the like.
- compressible fluid jetted through the jet holes of the aerostatic bearings generally fills between an outer peripheral surface of the mandrel and an inner surface of the support hole serving as a portion supporting the rotor by aerostatic gas.
- the support hole has the same shape with a circular (perfect circular) cross section as the outer peripheral shape of the mandrel, a rotation of the rotor causes no pressure variation, thereby ensuring high measurement accuracy.
- the support hole has a polygon-shaped inner hollow portion, squeeze occurs between the polygon-shaped portion and the outer peripheral surface of the mandrel according to the rotation (displacement) of the rotor unlike the case where the support hole has the circular (perfect circular) cross section. The squeeze effect at this time causes pressure to repeatedly increase and decrease between the same.
- the rotor supported by the mandrel generates hunting vibration due to this pressure variation. This vibration tends to impair the accuracy of measuring the amount of imbalance of the rotor. This vibration also poses a problem in that the rotor is likely to contact the mandrel, which may prevent satisfactory measurement of the amount of imbalance as desired.
- an object of the present invention is to provide a support apparatus for balance correction capable of measuring the amount of imbalance of a rotating body having a support hole including a polygonal shaped portion with a high accuracy.
- the present invention provides a support apparatus for balance correction as defined in the claims
- the variation in pressure occurring in a space between the polygon-shaped cross-section portion of the support hole and the outer peripheral surface of the mandrel is relieved outside through the vent holes.
- This configuration can suppress the pressure variation in a space between the polygonal shape cross-section portion of the support hole and the outer peripheral surface of the mandrel due to squeeze.
- the present invention can measure the amount of imbalance of the rotating body having a support hole, part of which is formed in a polygonal shape, with a high accuracy.
- the present invention can avoid a risk that the rotating body may contact the mandrel. Further, the present invention requires only a simple structure.
- the present invention can evenly relieve the varied pressure from within a space between the polygonal shape cross-section portion and the outer peripheral surface of the mandrel through a large number of vent holes, thereby further exerting much higher effects.
- the present invention form the vent holes on the shortest route, which makes it much easier to relieve pressure outside, thereby further exerting much higher effects.
- FIGS. 1 to 7 an embodiment illustrated in FIGS. 1 to 7 .
- FIG. 1 illustrates a schematic configuration of a balance correction apparatus for measuring the amount of imbalance (amount of dynamic imbalance) of a rotating body such as a turbocompressor rotor 1 (e.g., compressor rotor), in which reference numeral 2 denotes a base plate of the apparatus, reference numeral 3 denotes a frame body standingly disposed on an upper surface of the base plate 2, and reference numeral 4 denotes a vibration bridge body disposed in front of the frame body 3.
- a turbocompressor rotor 1 e.g., compressor rotor
- Each portion of the vibration bridge body 4 is coupled with a plurality of support spring members 5a protruding from the front surface of the frame body 3 and support spring members 5b (only some of them being illustrated) protruding from the upper surface of the base plate 2 so as to displaceably support the entire vibration bridge body 4 leftward and rightward.
- a support arm body 6 extends in a band shape from a front portion of the vibration bridge body 4.
- a support apparatus 10 (corresponding to the support apparatus for balance correction of the present application) for supporting the turbocompressor rotor 1 is mounted on a front end portion of the band-shaped support arm body 6.
- reference numeral 8a denotes a mounting member for mounting the various sensors 8 on the base plate 2
- reference numeral 9a denotes a mounting member for mounting the jet head portion 9 on the base plate 2.
- the above support apparatus 10 uses a structure using the vertical mandrel 11 for rotatably supporting the rotor 1 (single body) by aerostatic bearings.
- the structure of the support apparatus 10 is illustrated in FIG. 2 .
- the rotor 1 serving as a component to be measured.
- the rotor 1 includes a rotor body 20 in which a large number of blades 1a are formed on a disc-shaped base surface portion 20a.
- the rotor body 20 includes a cylindrical boss portion 21 formed at a center portion of the base surface portion 20a.
- the rotation axis portion of the rotor body 20 and the boss portion 21 of the base surface portion 20a include a support hole 22 having a circular cross section and penetrating the portions in a straight line.
- the support hole 22 includes therein a shaft 23 having a circular cross section and mating with the rotor 1.
- an end portion of the shaft 23 is inserted into the support hole 22, and the insertion end is fixed by a fixing member such as a nut member (not illustrated), whereby the rotor 1 is tightened between a receiving portion 23a receiving the end of the boss portion 21, thereby forming a module incorporating the rotor 1, that is, a rotor module.
- a fixing member such as a nut member (not illustrated)
- a structure having a polygonal shaped portion constituting part of the shaft 23 and support hole 22 is used (for example, for strong coupling, high precision axis alignment, and other purposes).
- the support hole 22 including an inner hollow portion having a circular cross section and covering the entire rotor 1 from one end to the other end thereof, and the shaft 23 having a circular cross section and corresponding to the support hole 22 are used.
- an end constituting part of the support hole 22 specifically, an inner surface of the boss portion 21 serving as the base end of the support hole 22 includes therein a triangular inner surface 26a as a polygon-shaped cross-section portion larger than the other inner hollow with a circular cross section, and the inside of the inner surface 26a is used as the triangular inner hollow portion 26.
- the shaft 23 includes a triangular flange portion 27 fitted into the triangular inner hollow portion 26. In other words, the rotor 1 and the shaft 23 are coupled with each other using a structure of fitting the triangular inner hollow portion 26 and the flange portion 27 to each other.
- the support apparatus 10 illustrated in FIGS. 1 and 2 includes a structure for stably supporting the rotor 1 using the support hole 22, part of which is formed in a polygonal shape.
- Reference numeral 11 denotes the aforementioned mandrel.
- the mandrel 11 includes a cylindrical mandrel member.
- the mandrel member is standingly disposed on an upper surface of a front end portion of the support arm body 6 so that the rotor 1 is mounted thereon from above the mandrel 11.
- the mandrel 11 includes a mounting seat 30 fixed on the support arm body 6, a disk-shaped portion 31 receiving the lower end of the rotor 1 (end of the boss portion 21), and a cylindrical portion 32 insertable into the rotor 1, in the order starting from the lower end thereof, and the mandrel 11 extends by a predetermined amount in the vertical direction from the support arm body 6.
- a portion on which the rotor body 20 on the front end side is mounted includes a pillar portion 32a with a circular cross section corresponding to the shape of a small diameter hole portion 22d occupying most of the support hole 22 of the rotor body 20. As illustrated in FIG.
- the portion on which the boss portion 21 on the base end side is mounted includes a pillar portion 32b having a diameter larger than that of the pillar portion 32a so as to fit the shape of a stepped portion 22a of the support hole 22.
- the portion corresponding to a triangular inner hollow portion 26 includes a pillar portion 32c (having a diameter smaller than that of the inner surface 26a) having a diameter smaller than that of the pillar portion 32b.
- the rotor 1 can be mounted around the mandrel 11 simply by inserting the mandrel 11 into the rotor 1 from an end (base end) of the support hole 22 without being affected by the presence or absence of the triangular inner hollow portion 26.
- an outer peripheral surface of the pillar portions 32a and 32b of the mandrel 11 includes aerostatic radial bearing surfaces 34b each having a large number of jet holes 34a to form an aerostatic radial bearing 34 receiving the inner surface of the support hole 22.
- the upper surface of the disk-shaped portion 31 includes an aerostatic thrust bearing surface 35b having a large number of jet holes 35a around the axis corresponding to the position of the end of the boss portion 21 to form therein an aerostatic thrust bearing 35 receiving the end surface (periphery of the opening of the support hole 22) of the boss portion 21 serving as the lower end of the rotor 1.
- the jet hole 34a is connected to an outside static pressure bearing gas supply device 37 through a path 36a having various hole diameters and formed along an axial portion of the mandrel 11 and a relay path 36b formed inside the support arm body 6.
- the jet hole 35a is connected to the aforementioned static pressure bearing gas supply device 37 through a path 38a formed in the disk-shaped portion 31 and a relay path 38b formed inside the support arm body 6.
- the outer peripheral surface of the pillar portion 32c facing the triangular inner hollow portion 26 (corresponding to the polygon-shaped cross-section portion of the present application) of the rotor 1 includes a vent hole 38.
- the vent hole 38 comprises a large number of vent holes, that is, here 9 vent holes, which are provided at equal intervals along a circumferential direction of the mandrel 11.
- any of the vent holes 38 includes a small diameter J-shaped path 39 in which an inlet 39a is opened in a space formed between the pillar portion 32c and the inner surface 26a, and an outlet 39b is opened outside the space.
- the inlet 39a of the path 39 is opened in an outer peripheral surface portion of the pillar portion 32c located near the lowest position in the space between the pillar portion 32c and the inner surface 26a; and the outlet 39b is opened at a position near and facing outside the aerostatic thrust bearing surface 35b, for example, at a position closer to the bearing surface 35b of the end surface of the disk-shaped portion 31 to form the path 39 by the shortest route.
- the path 39 formed by the shortest route provides a structure in which when the rotor 1 is rotated, a pressure variation occurring in a space between the triangular inner surface 26a and the outer peripheral surface of the pillar portion 32c with a circular cross section, particularly a rising pressure, is relieved outside.
- the mandrel 11 standing up in the vertical direction is fitted into the support hole 22 of the rotor 1 thereby to mount the rotor 1 on the mandrel 11.
- the hole portion 22d of the rotor 1 is disposed on the pillar portion 32a with a circular cross section of the mandrel 11 (including an upper aerostatic radial bearing 34)
- the stepped portion 22a of the rotor 1 is disposed on the pillar portion 32b (including a lower aerostatic radial bearing 34)
- the triangular inner hollow portion 26 of the rotor 1 is disposed on the pillar portion 32c.
- the end of the boss portion 21 of the rotor 1 is disposed on the aerostatic thrust bearing surface 35b.
- compressed air (compressible fluid) from the static pressure bearing gas supply device 37 is jetted by a predetermined amount through each of the jet holes 34a and 35a.
- air jetted through the jet hole 34a flows in between the aerostatic radial bearing surface 34b and the inner surface of the hole portion 22d and the inner surface of the stepped portion 22a, whereby the air flow flowing in therebetween rotatably supports the rotor 1 around the mandrel 11.
- the space (inner hollow portion 26) between the triangular inner surface 26a of the rotor 1 and the pillar portion 32c of the mandrel 11 is filled with air jetted through the jet holes 34a and 35a of the aerostatic bearings 34 and 35.
- the above described rotor causes no problem because the rotor is mounted on the mandrel with the same circular shape as each other, but the rotor 1 is specified such that the end of the support hole 22 has a polygon shape, specifically, a triangular shape. Therefore, as the rotor 1 is rotated, squeeze occurs between the boss portion 21 having the triangular inner hollow portion 26 and the pillar portion 32c with a circular cross section. For this reason, an increase and a decrease in pressure due to squeeze effect occurs repeatedly in the space between the triangular inner surface 26a and the pillar portion 32c with a circular cross section. Specifically, as illustrated in FIG. 5 , pressure is increased on the front side in the direction of the rotation of the varying triangular inner surface 26a, and pressure is decreased on the rear side in the direction of the rotation thereof.
- the rotor 1 generates hunting vibration due to the pressure variation. If left in this state, the rotor 1 is affected by the hunting vibration, which impairs the accuracy of measuring the amount of imbalance of the rotor 1.
- the mandrel 11 includes the vent hole 38 for relieving the pressure varying in the space between the triangular inner surface 26a and the pillar portion 32c with a circular cross section outside. Therefore, as illustrated by the arrows in FIGS. 2 and 5 , the pressure variation occurring in the space, that is, the rising pressure, is relieved out of the space (outside) through the vent hole 38. The falling pressure is compensated by the air of the aerostatic bearings 34 and 35.
- the amount of imbalance of the rotor 1 (rotating body) can be measured with a high accuracy.
- the measurement accuracy can be improved simply by forming the vent hole 38 at a position of the outer peripheral surface of the mandrel 11 facing the polygon-shaped cross-section portion of the support hole 22, which requires only a simple structure. Further, this structure can avoid a risk, and concern, that the rotor 1 may contact the mandrel 11.
- vent holes 38 are provided at equal intervals along a circumferential direction of the mandrel 11, which can evenly relieve the varied pressure outside, thereby further effectively can suppress the pressure variation.
- vent holes 38 are formed on the shortest route, which makes it easy to relieve the varied pressure outside, thereby more effectively suppress the pressure variation.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Testing Of Balance (AREA)
- Manufacture Of Motors, Generators (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
Claims (3)
- Dispositif de support pour correction d'équilibre comprenant :un corps rotatif (1) présentant un trou de support (22) de section transversale circulaire au niveau d'une partie centrale de rotation, dans lequel un côté d'extrémité du trou de support est formé dans une section transversale de forme polygonale, et un mandrin vertical (11) sur lequel le corps rotatif est monté dans une direction verticale par insertion dans le trou de support, sachant qu'une surface périphérique extérieure du mandrin inclut un palier radial aérostatique (34) recevant en rotation une surface intérieure de section transversale circulaire du trou de support, un côté d'extrémité de base inclut un palier de butée aérostatique (35) recevant en rotation une périphérie d'une ouverture au niveau d'une extrémité inférieure du trou de support, et une structure est configurée de telle sorte que du fluide compressible pour palier aérostatique soit éjecté du palier radial aérostatique et du palier de butée aérostatique pour supporter en rotation le corps rotatif en faisant flotter le corps rotatif autour du mandrin, pour permettre à la quantité de déséquilibre d'être mesurée en appliquant une force de rotation au corps rotatif dans un état flottant, caractérisé en ce quede la surface périphérique extérieure du mandrin, une partie de surface périphérique extérieure faisant face à la partie de section transversale de forme polygonale du trou de support inclut un trou d'évent (38) destiné à relâcher de la pression variant dans un espace entre la partie de section transversale de forme polygonale et la surface périphérique extérieure de la face extérieure du mandrin selon la rotation du corps rotatif.
- Le dispositif de support pour correction d'équilibre selon la revendication 1, caractérisé en ce que le trou d'évent (38) comprend un grand nombre de trous d'évent prévus à intervalles égaux le long d'une direction circonférentielle sur la surface périphérique extérieure du mandrin (11).
- Le dispositif de support pour correction d'équilibre selon la revendication 1 ou 2, caractérisé en ce que le trou d'évent (38) est un chemin, le chemin présentant une entrée (39a) proche d'une position la plus basse dans un espace entre la partie de section transversale de forme polygonale du mandrin (11) et la surface périphérique extérieure du mandrin, le chemin présentant une sortie (39b) dans une position tournée vers l'extérieur près de la surface de palier de butée aérostatique (35b).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2012189633A JP5415601B1 (ja) | 2012-08-30 | 2012-08-30 | バランス修正用支承装置 |
PCT/JP2013/073118 WO2014034769A1 (fr) | 2012-08-30 | 2013-08-29 | Dispositif de support pour correction d'équilibre |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2891873A1 EP2891873A1 (fr) | 2015-07-08 |
EP2891873A4 EP2891873A4 (fr) | 2016-04-06 |
EP2891873B1 true EP2891873B1 (fr) | 2017-07-26 |
Family
ID=50183574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13833183.0A Active EP2891873B1 (fr) | 2012-08-30 | 2013-08-29 | Dispositif de support pour correction d'équilibre |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2891873B1 (fr) |
JP (1) | JP5415601B1 (fr) |
KR (1) | KR101988465B1 (fr) |
CN (1) | CN104769404B (fr) |
HK (1) | HK1212019A1 (fr) |
WO (1) | WO2014034769A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10054129B2 (en) * | 2014-03-24 | 2018-08-21 | Ihi Rotating Machinery Enginering Co., Ltd. | Support apparatus for balance correction |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6830263B2 (ja) * | 2016-08-10 | 2021-02-17 | 国際計測器株式会社 | 動釣合い試験機 |
US20230037942A1 (en) * | 2017-06-16 | 2023-02-09 | Trane International Inc. | Aerostatic thrust bearing and method of aerostatically supporting a thrust load in a scroll compressor |
JP7005372B2 (ja) * | 2018-02-09 | 2022-02-10 | 三菱電機株式会社 | 回転電機、電気掃除機、回転電機のバランス試験方法および回転電機の製造方法ならびに電気掃除機の製造方法 |
CN117072470A (zh) * | 2023-09-07 | 2023-11-17 | 佛山市南海区绿智电机设备有限公司 | 一种带定位结构的新风***离心风扇叶及平衡校正装置 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE59710695D1 (de) * | 1997-09-19 | 2003-10-09 | Abb Turbo Systems Ag Baden | Verdichterradbefestigung für schnellaufende Turbomaschinen |
JP3918809B2 (ja) * | 2003-12-10 | 2007-05-23 | 石川島播磨重工業株式会社 | 回転体のバランス修正用支承装置 |
JP2005172537A (ja) * | 2003-12-10 | 2005-06-30 | Ishikawajima Harima Heavy Ind Co Ltd | 回転体のバランス修正用支承装置 |
JP2006316951A (ja) * | 2005-05-16 | 2006-11-24 | Valeo Thermal Systems Japan Corp | 圧縮機の動力伝達装置 |
JP2009281462A (ja) * | 2008-05-21 | 2009-12-03 | Ntn Corp | 静圧気体軸受スピンドル |
JP5660292B2 (ja) * | 2010-08-09 | 2015-01-28 | 株式会社Ihi | バランス修正装置と方法 |
CN203443733U (zh) * | 2013-08-15 | 2014-02-19 | 甘肃酒钢集团宏兴钢铁股份有限公司 | 高速线材传动柜冷却风机动平衡校正装置 |
-
2012
- 2012-08-30 JP JP2012189633A patent/JP5415601B1/ja active Active
-
2013
- 2013-08-29 KR KR1020157007285A patent/KR101988465B1/ko active IP Right Grant
- 2013-08-29 CN CN201380051020.5A patent/CN104769404B/zh active Active
- 2013-08-29 WO PCT/JP2013/073118 patent/WO2014034769A1/fr active Application Filing
- 2013-08-29 EP EP13833183.0A patent/EP2891873B1/fr active Active
-
2015
- 2015-12-24 HK HK15112671.4A patent/HK1212019A1/xx unknown
Non-Patent Citations (1)
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10054129B2 (en) * | 2014-03-24 | 2018-08-21 | Ihi Rotating Machinery Enginering Co., Ltd. | Support apparatus for balance correction |
Also Published As
Publication number | Publication date |
---|---|
CN104769404A (zh) | 2015-07-08 |
CN104769404B (zh) | 2018-02-27 |
EP2891873A4 (fr) | 2016-04-06 |
JP5415601B1 (ja) | 2014-02-12 |
HK1212019A1 (en) | 2016-06-03 |
JP2014048091A (ja) | 2014-03-17 |
EP2891873A1 (fr) | 2015-07-08 |
WO2014034769A1 (fr) | 2014-03-06 |
KR101988465B1 (ko) | 2019-06-12 |
KR20150047566A (ko) | 2015-05-04 |
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