KR101988465B1 - Support device for balance correction - Google Patents
Support device for balance correction Download PDFInfo
- Publication number
- KR101988465B1 KR101988465B1 KR1020157007285A KR20157007285A KR101988465B1 KR 101988465 B1 KR101988465 B1 KR 101988465B1 KR 1020157007285 A KR1020157007285 A KR 1020157007285A KR 20157007285 A KR20157007285 A KR 20157007285A KR 101988465 B1 KR101988465 B1 KR 101988465B1
- Authority
- KR
- South Korea
- Prior art keywords
- mandrel
- rotor
- hole
- static
- bearing
- Prior art date
Links
- 238000007599 discharging Methods 0.000 claims abstract description 6
- 230000002093 peripheral effect Effects 0.000 claims description 20
- 230000003068 static effect Effects 0.000 claims description 17
- 239000012530 fluid Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 3
- 239000004744 fabric Substances 0.000 abstract description 2
- 238000005259 measurement Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 239000007921 spray Substances 0.000 description 6
- 239000000758 substrate Substances 0.000 description 5
- 230000002706 hydrostatic effect Effects 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000010959 steel Substances 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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/02—Details of balancing machines or devices
- G01M1/04—Adaptation of bearing support assemblies for receiving the body to be tested
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M1/00—Testing static or dynamic balance of machines or structures
- G01M1/14—Determining imbalance
- G01M1/16—Determining imbalance by oscillating or rotating the body to be tested
Landscapes
- 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)
Abstract
The balance correcting wager according to the present invention is characterized in that among the outer circumferential surface of the mandrel 11 to which the support hole 22 of the magnet body 1 having the section 26 formed in a polygonal cross- A discharge hole 38 for discharging a pressure varying in the space between the cross-sectional portion of the polygon and the outer circumferential surface of the mandrel in accordance with the rotation of the entire fabric is provided at a position facing the cross-sectional shape portion 26a of the mandrel.
Description
In order to perform a balance correction of a rotating assembly rotating at high speed such as a rotor of a turbocompressor, the present invention is applied to a rotating member of a turbo compressor by rotating a whole of the rotating assembly by using a vertical mandrel equipped with a static- The present invention relates to a balance device for correcting a balance to be able to support a material freely.
In order to solve the unbalance (dynamic unbalance) caused by the component tolerance at the time of manufacture, the unbalance amount is measured using a normal balance correcting device in the rotor of the turbo compressor rotating at high speed The unbalance is corrected.
In a balance correcting device, a mandrel equipped with a static pressure gas bearing is used so that a measurement of an unbalance amount is performed with high accuracy. Device) is used. Most of the mandrel is a cylindrical mandrel member in which a circular support hole in the rotation center portion of the rotor is tightly fitted as shown in Fig. 5 of
With this structure, when the support hole of the rotor is inserted into the mandrel, the entire rotor is mounted on the mandrel. Thereafter, a compressive fluid (air; for a static-pressure gas bearing) is ejected from the ejection hole of the static-pressure gas radial bearing to the inner surface of the support hole, (Air; for a static-pressure gas bearing), the rotor rotates around the mandrel while being levitated.
The measurement of the unbalance amount (dynamic unbalance amount) is carried out by applying a rotational force from the outside to the rotor in the floating state, for example, by jetting the driving air (driving fluid) toward the rotor surface to rotate the rotor at a high speed, And measuring the behavior of the rotating rotor by various sensors provided in the correction device.
Normally, as the support hole of the rotor, a hole having a circular cross-sectional shape, that is, a circular cross-sectional shape as a whole, is used, as disclosed in
However, in the field of various systems in which a turbo compressor is used for the rotor of the turbocompressor, many demands are being made such as connecting the shaft to the shaft strongly and matching the shaft center of the rotor with the axis of the shaft with high precision.
In recent years, in order to meet this demand, a rotor type rotor has been proposed in which not only a circular cross-section but also a multi-rotor type rotor is combined with a shaft by connecting the rotor and shaft. In order to realize this connection method, it has been studied to form an internal cavity portion of a polygonal cross-sectional shape which engages with a polygonal portion formed on the shaft, on the end side of the support hole of the rotor .
However, if the support hole having the lapped portion of the polygonal shape is adopted, there is a fear that the unbalance amount of the rotor can not be measured satisfactorily.
That is, when measuring the unbalance amount of the rotor, the compressible fluid ejected from the ejection hole of the static-pressure gas bearing is filled between the outer peripheral surface of the mandrel, which is a portion supporting the rotor with the regulator body, and the inner surface of the support hole.
At this time, if the support hole has the same circular section (full circle) as the outer circumferential shape of the mandrel, the pressure fluctuation does not occur even if the rotor rotates, and thus high measurement precision is ensured. However, if the supporting hole has a polygonal lumen, a squeeze occurs between the portion of the polygonal shape and the outer peripheral surface of the mandrel due to the rotation (displacement) of the rotor, unlike the case of the circular section (full circle). Due to the squeeze effect at this time, the pressure rise and fall are repeated within the copper.
This pressure fluctuation causes a hunting vibration in the mandrel rotor. Therefore, the accuracy of measuring the unbalance amount of the rotor tends to be impaired. In addition, there is a problem that the rotor is likely to come into contact with the mandrel, and measurement of the unbalance amount at a desired period may not be performed satisfactorily.
SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a balance device for balance correction capable of measuring the unbalance amount of the entire workpiece with a part of the support hole being formed into a polygonal shape with high precision.
According to the present invention, in the outer peripheral surface of a vertically oriented mandrel in which the support hole of the entire workpiece having a portion formed by a polygonal cross-sectional shape is mounted on the end side, A vent hole for externally discharging a pressure varying in a space between the cross-sectional shape of the polygon and the outer peripheral surface of the mandrel is provided (claim 1).
With this configuration, even when a part of the support hole has a polygonal sectional shape, when measuring the unbalance amount (dynamic unbalance amount), the fluctuation of the pressure occurring in the space between the end surface of the polygon of the support hole and the outer peripheral surface of the mandrel Is discharged to the outside through the discharge hole. Therefore, the pressure fluctuation between the end face of the polygonal shape of the support hole and the outer peripheral face of the mandrel due to the squeeze is suppressed, and the unbalance amount of the entire workpiece is measured with high accuracy.
Preferably, in addition to the above-mentioned objects, the discharge holes are provided at equal intervals in the main direction (circumferential direction) on the outer peripheral surface of the mandrel so as to uniformly discharge the fluctuating pressure (claim 2).
Preferably, in addition to the above-mentioned object, the discharge hole has an inlet near the lowermost portion of the space between the cross-sectional shape of the polygon in the mandrel and the outer peripheral surface of the mandrel so as to facilitate output of the fluctuating pressure, And a passage formed by the shortest path is used (claim 3).
According to the present invention, when measuring the unbalance amount of the entire fabric, variations in the pressure occurring in the space between the end face of the polygon of the support hole and the outer peripheral surface of the mandrel are released to the outside through the discharge hole. Thereby, the pressure fluctuation can be suppressed in the space between the end face of the polygonal shape of the support hole and the outer peripheral face of the mandrel, which is caused by the squeeze.
As a result, it is possible to measure the unbalance amount with high accuracy in the entire workpiece having a part of the support hole in a polygonal shape. In addition, it is possible to avoid the concern that the entire mandrel is brought into contact with the mandrel. In addition, a simple structure is solved (claim 1).
In addition to the above effect, the changed pressure can be uniformly discharged from the space between the cross-sectional portion of the polygonal shape and the outer peripheral surface of the mandrel through the plurality of discharge holes, and the effect is further enhanced (Claim 2).
In addition to the above effect, since the discharge hole is further formed in the shortest path, the pressure can be further exerted to the outside, resulting in a further higher effect (claim 3).
BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view showing a balance correcting device according to an embodiment of the present invention, together with a balance correcting device to which the apparatus is applied. Fig.
Fig. 2 is a cross-sectional view showing the structure of each part of the balance correcting wager; Fig. 2 is a view showing a state in which a rotor (entire assembly) is mounted on a mandrel;
3 is a cross-sectional view taken along line AA in Fig.
4 is a sectional view taken along line BB in Fig.
5 is a cross-sectional view for explaining an in-space behavior between a cross section of a polygon of the support hole and an outer peripheral surface of the mandrel when the rotor rotates;
6 is a perspective view for explaining a rotor (entire assembly) of a turbo compressor for measuring an unbalance amount;
7 is a perspective view illustrating a connection structure using a polygonal portion of the rotor.
Hereinafter, the present invention will be described based on one embodiment shown in Figs. 1 to 7. Fig.
Fig. 1 shows a schematic configuration of a balance correcting device for measuring the unbalance amount (dynamic unbalance amount) of the entire rotor, for example, the
Each part of the
A structure in which the rotor 1 (single unit) is rotatably held by a constant-pressure gas bearing is used for the above-mentioned
Before describing the structure of the
Here, the
In other words, generally, the entire portion from one end of the
A structure for stably holding the
Referring to Figs. 1 and 2, the respective components of the
That is, the
A constant pressure gas
As shown in Fig. 2, the
When air is ejected from the pair of
In addition, as shown in Figs. 1, 2 and 4 (section BB in Fig. 2), among the outer circumferential surfaces of the
Either of the discharge holes 38 is opened in the space where the
Next, the point that this pressure fluctuation is transmitted will be described.
2, the
Thereafter, the compressed air (compressible fluid) from the
Thereafter, when air is blown from the ejection holes 9b (only a part of which is shown in FIG. 1) of the pair of
At this time, the space (the inner circumferential portion 26) between the
Here, since the rotor so far is paired with the mandrel, it is not a problem, but the end of the
Hunting vibration occurs in the
This suppresses the pressure fluctuation between the end face of the polygonal shape of the support hole 22 (the inner
Therefore, it is possible to perform the measurement of the unbalance amount of the rotor 1 (the entire assembled body) with high accuracy. In addition, since the measurement accuracy is improved only by forming the
In particular, since the discharge holes 38 are arranged at equal intervals at equal intervals along the main direction of the
In addition, if the
The present invention is not limited to the above-described embodiment, and various changes may be made without departing from the gist of the present invention. For example, in the above-described embodiment, the polygonal portion of the support hole is a triangular lumen portion, but the present invention is not limited to this, but another polygonal lumen portion may be used. In the embodiment described above, nine ejection holes are provided. However, the present invention is not limited to this, and it is sufficient that the effect of suppressing the pressure fluctuation can be sufficiently secured even if nine or more ejection holes are provided. no. Of course, in the above-described embodiment, the rotor of the turbocompressor is used. However, the present invention is not limited to this, and the present invention can be applied to any assembly requiring measurement of the unbalance amount.
1: Rotor (full assembly)
10: Standby device (balance device for balance adjustment)
11: Mandrel
22: Support hole
26: inner-strength portion of the triangular shape (portion of the cross-sectional shape of the polygon)
26a: inner surface of triangle (inner surface of polygon)
34: Constant-pressure gas radial bearing
35: Static thrust bearings
38: vent hole
39a: entrance
39b: exit
Claims (3)
Wherein the mandrel has a constant-pressure gas radial bearing for rotatably accommodating an inner surface of a circular section of the support hole on the outer circumferential surface thereof, and on the proximal end side, A thrust bearing for receiving a static pressure gas thrust bearing for receiving a static pressure gas bearing thrust bearing from said static gas radial bearing and said static thrust bearing for discharging a pressurized fluid for said static gas bearing from said static gas radial bearing, And is capable of measuring an unbalance amount by applying a rotational force to the entire fabricated state in a floating state,
Wherein a pressure fluctuating in a space between the cross-sectional portion of the polygon and the outer peripheral surface of the mandrel according to the rotation of the entire machined portion is formed in the outer peripheral surface portion of the outer peripheral surface of the mandrel, And a discharging hole is provided for discharging the toner.
Wherein the discharge hole is provided at a plurality of equally spaced intervals along the main direction (circumferential direction) on the outer circumferential surface of the mandrel.
Wherein the discharge hole has an inlet at a lowermost position in a space between a section of the polygon and an outer peripheral surface of the mandrel and has an outlet at a point outside the vicinity of the static pressure gas thrust bearing surface Wherein the through hole is a through hole.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JPJP-P-2012-189633 | 2012-08-30 | ||
JP2012189633A JP5415601B1 (en) | 2012-08-30 | 2012-08-30 | Balance correction support device |
PCT/JP2013/073118 WO2014034769A1 (en) | 2012-08-30 | 2013-08-29 | Support device for balance correction |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20150047566A KR20150047566A (en) | 2015-05-04 |
KR101988465B1 true KR101988465B1 (en) | 2019-06-12 |
Family
ID=50183574
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020157007285A KR101988465B1 (en) | 2012-08-30 | 2013-08-29 | Support device for balance correction |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP2891873B1 (en) |
JP (1) | JP5415601B1 (en) |
KR (1) | KR101988465B1 (en) |
CN (1) | CN104769404B (en) |
HK (1) | HK1212019A1 (en) |
WO (1) | WO2014034769A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6434706B2 (en) * | 2014-03-24 | 2018-12-05 | 株式会社Ihi回転機械エンジニアリング | Support device for balance correction |
CN113176037A (en) | 2016-08-10 | 2021-07-27 | 国际计测器株式会社 | Dynamic balance testing machine |
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 (en) * | 2018-02-09 | 2022-02-10 | 三菱電機株式会社 | Rotating electric machine, electric vacuum cleaner, balance test method of rotating electric machine, manufacturing method of rotating electric machine, and manufacturing method of electric vacuum cleaner |
CN117072470A (en) * | 2023-09-07 | 2023-11-17 | 佛山市南海区绿智电机设备有限公司 | Fresh air system centrifugal fan blade with positioning structure and balance correction device |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005172538A (en) | 2003-12-10 | 2005-06-30 | Ishikawajima Harima Heavy Ind Co Ltd | Support apparatus for correcting balance of rotational body |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0903465B1 (en) * | 1997-09-19 | 2003-09-03 | ABB Turbo Systems AG | Compressor wheel-shaft connection for high speed turbomachinery |
JP2005172537A (en) * | 2003-12-10 | 2005-06-30 | Ishikawajima Harima Heavy Ind Co Ltd | Support apparatus for correcting balance of rotational body |
JP2006316951A (en) * | 2005-05-16 | 2006-11-24 | Valeo Thermal Systems Japan Corp | Power transmission of compressor |
JP2009281462A (en) * | 2008-05-21 | 2009-12-03 | Ntn Corp | Aerostatic journal bearing spindle |
JP5660292B2 (en) * | 2010-08-09 | 2015-01-28 | 株式会社Ihi | Balance correction apparatus and method |
CN203443733U (en) * | 2013-08-15 | 2014-02-19 | 甘肃酒钢集团宏兴钢铁股份有限公司 | High-speed wire transmission cabinet cooling fan dynamic balance correcting apparatus |
-
2012
- 2012-08-30 JP JP2012189633A patent/JP5415601B1/en active Active
-
2013
- 2013-08-29 WO PCT/JP2013/073118 patent/WO2014034769A1/en active Application Filing
- 2013-08-29 CN CN201380051020.5A patent/CN104769404B/en active Active
- 2013-08-29 EP EP13833183.0A patent/EP2891873B1/en active Active
- 2013-08-29 KR KR1020157007285A patent/KR101988465B1/en active IP Right Grant
-
2015
- 2015-12-24 HK HK15112671.4A patent/HK1212019A1/en unknown
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005172538A (en) | 2003-12-10 | 2005-06-30 | Ishikawajima Harima Heavy Ind Co Ltd | Support apparatus for correcting balance of rotational body |
Also Published As
Publication number | Publication date |
---|---|
EP2891873A4 (en) | 2016-04-06 |
JP2014048091A (en) | 2014-03-17 |
EP2891873A1 (en) | 2015-07-08 |
KR20150047566A (en) | 2015-05-04 |
WO2014034769A1 (en) | 2014-03-06 |
JP5415601B1 (en) | 2014-02-12 |
CN104769404B (en) | 2018-02-27 |
HK1212019A1 (en) | 2016-06-03 |
EP2891873B1 (en) | 2017-07-26 |
CN104769404A (en) | 2015-07-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
KR101988465B1 (en) | Support device for balance correction | |
US10054129B2 (en) | Support apparatus for balance correction | |
US20080093175A1 (en) | Spindle device | |
JP2022151452A (en) | Balance measuring device of rotor, and its balance measurement method | |
TW202012801A (en) | Bearing device and machine tool spindle device | |
JP2015184086A5 (en) | ||
JP4832257B6 (en) | High speed air spindle | |
JP7005372B2 (en) | Rotating electric machine, electric vacuum cleaner, balance test method of rotating electric machine, manufacturing method of rotating electric machine, and manufacturing method of electric vacuum cleaner | |
CN103615466A (en) | High-precision air floatation shaft system air supply mechanism | |
CN109564140A (en) | Dynamic balance testing machine | |
JP2009079943A (en) | Outer diameter deflection measuring device | |
US10920784B2 (en) | Magnetic bearing centrifugal compressor and controlling method thereof | |
JP5617229B2 (en) | Air spindle and air supply device | |
TW201410981A (en) | Vacuum pump | |
US7360420B2 (en) | Method and bearing for balancing rotors without journals | |
JP6402459B2 (en) | Static pressure gas bearing rotation guide device | |
JP2015175510A (en) | Hydrostatic gas bearing rotation guide device | |
JP6140888B2 (en) | Centrifugal compressor impeller | |
Šimek et al. | Power gyroscopes of stabilizing system | |
JP6376288B2 (en) | Balance inspection device | |
JP2011220919A (en) | Vertical type balance measuring device | |
JP2015175508A (en) | Hydrostatic gas bearing rotation guide device | |
JPH09317677A (en) | Vertical shaft type submerged pump device for liquefied gas tank | |
JP2015175511A (en) | Hydrostatic gas bearing rotation guide device |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant |