CN1200430A - Device for rotary machine - Google Patents
Device for rotary machine Download PDFInfo
- Publication number
- CN1200430A CN1200430A CN 97114512 CN97114512A CN1200430A CN 1200430 A CN1200430 A CN 1200430A CN 97114512 CN97114512 CN 97114512 CN 97114512 A CN97114512 A CN 97114512A CN 1200430 A CN1200430 A CN 1200430A
- Authority
- CN
- China
- Prior art keywords
- support device
- stator component
- rotatable parts
- power
- bearing means
- 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.)
- Pending
Links
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
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/16—Arrangement of bearings; Supporting or mounting bearings in casings
- F01D25/162—Bearing supports
- F01D25/164—Flexible supports; Vibration damping means associated with the bearing
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
A device for a rotary machine with a stator part (2) and a rotary part (1) supported therein comprises first support means (5) arranged to absorb forces appearing between the stator part (2) and the rotary part (1), and second support means (7) arranged to absorb forces appearing between the rotary part (1) and the stator part (2) and exceeding a certain level, as the forces absorbed by the first support means (5) reach this level.
Description
The present invention relates to a kind of device that is used for a rotary machine, this rotary machine comprises a stator component and a rotor part by its support, and is provided with first support device and absorbs the power that occurs between stator component and the rotor part.
This device of generally seeing is applicable to such rotary machine, it the power of a reduced levels occurs between rotor part and the stator component under the normal operation condition, be generally the gravity of rotor, yet between the two much bigger power may appear under special circumstances.Owing to be specially adapted to the rotary machine of the sort of type according to device of the present invention, the medium temperature of flowing through wherein is different with ambient temperature, and then this has just caused occurring the tension force of temperature trigger between rotatable parts and stator component, described with reference to should be used on a kind of like this machine and the present invention is special, obviously without any the purpose that limits.
For the rotary machine of institute's define styles,, be known in the part that elastically deformable is set between stator component and the rotatable parts according to prior art.Described part at first can be carried rotor under the situation of not bearing any distortion, and hold it in a central position of rotary machine, can be out of shape by it on the other hand and absorb because how much of parts in the rotary machine of being included in that temperature variation and relative thermal expansion phenomenon produce change.Certainly, importantly, by described part because the distortion that produces of the temperature difference makes rotor still keep centering.According to prior art, the part of this elastically deformable for example is to be made of the annular and the elastically deformable body of taper configurations, and it is arranged between the bearing housing and with bearing housing and links to each other, and rotor is supported on the stator in bearing housing.Yet it is very big that the power that occurs between rotor part and stator component surpasses common power sometimes, therefore also must this power be absorbed by described resiliently deformable part.This situation for example is to take place when the blade injury for the rotary machine of turbine type, and promptly a rotor blade is loosening in running, therefore occurs great power between stator component and rotatable parts.If resiliently deformable part also can absorb these power,, compare obvious excessive size of needs with the size that the gravity that only is used to absorb rotor is required then for a given material and a given geometry designs.This oversize except causing other problem, also can cause absorbing the decline of the ability of the power that causes by the temperature trigger dimensional changes by resiliently deformable.This is because because size is big, and they have produced bigger resistance to this distortion, therefore do not allow stator and rotor that different expansions is arranged.
In any case, the size of described part all can not weakness so far forth so that can not absorb the sort of for example relevant and very big power that occurs with blade injury.Because if at that rate, will make rotary machine, for example be arranged to by a kind of high temperature or very the rotary machine of the turbine type of the media drive of high temperature storage as combustion gas or steam cause costing very big and very serious destruction.Therefore, according to prior art, need the resiliently deformable part of oversize.
The purpose of this invention is to provide a kind of device that starts defined type, it can absorb the great power of a rotary machine, for example relevant with blade injury power.
According to the present invention, reach this purpose and be because this device includes second support device, when rotatable parts that absorbed when first support device and the power between the stator component reached certain level, second support device absorbed the power that surpasses this level.
According to a preferred embodiment, first support device comprises one first supporting element, it is arranged to absorb because the caused power of dimensional changes of at least one in stator component and the rotatable parts by resiliently deformable, and second support device comprises one second supporting element, and it absorbs on the direction with respect to first supporting element in load is rigidity.
Therefore, because the rigidity of second support device on the load absorption direction has obtained an advantage, Here it is, and second support device need not special distortion just can absorb very big power or stress.Under the situation of very large radial force, the radial force that when blade injury, in a rotary machine, occurs for example, this meeting makes rotatingshaft also can therefore be cancelled with respect to the very large power that normal running position moves radially.However, in normal course of operation, when this unusual radial force does not occur, obtain an advantage, Here it is, because the inapparent dimensional changes of temperature effect between rotatable parts and stator component can be glossily, the resiliently deformable of promptly flexibly passing through first supporting element shifts, and the function of second support device is without any participation.
According to another embodiment, first and second support device be arranged in parallel.Thereby, between rotatable parts and stator component owing to its resiliently deformable is not automatically shifted to second support device by the power that absorbs of resiliently deformable of first device.This parallel setting also makes first and second support devices simply constitute, and to guarantee reaching certain level when the power one that first support device is absorbed, second support device is just had an effect, thus and generation resiliently deformable to a certain degree.
According to another preferred embodiment, first support device is arranged to absorb because the temperature effect that exists in the rotary machine, caused and appeared at power between stator component and the rotatable parts that by the dimensional changes of at least one in rotatable parts and the stator component level of described stress equals gravity and because the level of the power sum that the Temperature Influence that exists in the rotary machine occurs that rotor acts on first support device between rotatable parts and stator component.
Therefore, people have obtained this advantage especially, promptly, when selecting the size of first support device, can only consider to keep the centering of rotor in rotary machine with effective and efficient manner, and absorb power up to level defined above, no matter these power are caused or caused by other effect by temperature action, like this, first support device just needn't be manufactured to such an extent that have unnecessary rigidity, also is not subjected to danger more energetically.
According to another preferred embodiment, first support device is connected in stator with a first surface, is connected in a bearing means with a second surface, and described bearing means is supported in the rotatable parts rotationally.
Like this, first support device and stator component and rotatable parts have just formed always and have connect in succession, and have played the effect of the support device of the bearing means that is used for supporting rotationally rotatable parts.Therefore, first support device can with stator component and/or bearing means Construction integration.
According to another preferred embodiment, second support device is arranged on stator component and supports rotationally between the bearing means of rotatable parts, and this support device is arranged to when it is in non-load condition and is left a distance between one of stator component and bearing means at least.
Therefore, owing to there is described distance, as long as this is apart from existence, second support device just can not absorb any load between rotatable parts and the stator component.This embodiment allows to form a kind of simple structure, and it can reduce to this distance the degree corresponding to the increase of the resiliently deformable of first support device.
According to another preferred embodiment, second support device is arranged on stator component and supports rotationally between the bearing means of rotatable parts, so as the state lower support of its movable suction the two.
Therefore, can construct first and second support devices by this way, and be its sizing, when the first support device resiliently deformable to the degree of the power that absorbs previously defined level corresponding to it time, second support device is supported on respectively between bearing means and the stator component.
According to another preferred embodiment, second support device comprises an annular support member, and centers on a bearing means setting of rotatable parts.
This annular design is favourable, and except other aspect, it makes second support device can absorb radial force between rotatable parts and the stator component on all directions in the plane of rotation of rotatable parts.Absorbability evenly distributedly so just.A kind of alternative is, second support device can comprise plurality of sections, the piece that for example is separated from each other, and they define a ring around bearing means together.
According to another preferred embodiment, stator component is provided with and is used for the passage that a thermal medium flows through rotary machine, and first and second support devices are arranged on and radially extend on the stator component and cross on the part of these passages.This means, first and second support devices are arranged on the part place that the latter on the stator component obviously is subjected to temperature effect, therefore its function particular importance that becomes, because be absorbed in this concrete zone because the power between caused rotatable parts of dimensional changes and the stator component is considered to important, described variation for example is because due to the temperature effect, also owing to the caused less power of the gravity that absorbs rotor or for example because due to the caused bigger power of blade injury on the rotatable parts.
This rotary machine is preferably a turbine by the driving of one of medium that comprises steam and combustion gas.
Further advantage of the present invention as can be seen and favorable characteristics from following description and other independent claims.
Below with reference to accompanying drawing the preferred embodiments of the present invention that relate to by way of example are described in detail.Wherein:
Fig. 1 is a drawing in side sectional elevation, and it shows briefly according to the present invention and is arranged on the rotatable parts of a rotary machine and the device between the stator component;
Fig. 2 is a drawing in side sectional elevation that is similar to Fig. 1, shows the device that is arranged on a stator component that has passage according to the present invention;
Fig. 3 is a drawing in side sectional elevation along the intercepting of the III-III line among Fig. 2, and it shows the plane of rotation of rotor.
One preferred embodiment of apparatus of the present invention has been shown in Fig. 1-3.This device is arranged in the rotary machine that comprises rotatable parts 1 and a stator component 2.Rotatable parts 1 are arranged in the stator component 2 rotationally by a bearing means, and bearing means comprises a bearing housing 3 and a bearing that sets within it 4.
This rotary machine is preferably one by one of steam and combustion gas turbine as media drive.Yet the rotary machine of being touched upon also can be some other types.
First support device 5 is arranged between stator component 2 and the bearing housing 3.At this, support device 5 comprises an annular solid, and its two opposite ends portion is connected in bearing means 3,4 and stator component 2 respectively, and this annular solid provides the part of at least one conical design, around rotor axis 6 extensions and roughly concentric with it.The size of the wall ratio annular solid extension diametrically of tapering part is much smaller.It is also much smaller than the size that described part is extended between its two end part.
Support device 5 is connected in bearing housing 3 with a surface of one end, and is connected in stator component 2 with a surface of its other end.5 absorptions of the supported device of dimensional changes that rotatable parts 1 and stator component 2 produce owing to for example temperature difference between the two.Particularly support device 5 radial dimension that can absorb rotatable parts 1 and stator component 2 changes, because its cone structure and size make it can resiliently deformable.Simultaneously, owing to its deadweight and the weight of rotor act on normal forces on the bearing means 3,4 by support device 5 transfers.This transfer must be such generation, makes the distortion in support device not change the position of rotor center with respect to stator component 2 basically.Yet between rotatable parts 1 and stator component 2 great power may appear in some cases.An example of this situation is those situations that are associated with so-called blade injury and occur, in this case, a kind of imbalance appears in the rotatable parts 1 with high rotational speed, consequent radial force will inevitably be transferred to stator component 2 from rotatable parts 1, and the rotating shaft that preferably makes rotatable parts 1 is with respect to as far as possible little in the deviation of axle position occupied described in the normal operation process that does not have this great power to occur.The power of other that occurs for the level of the power of transmitting those maximums that absorbed by first support device 5 except expectation, this device comprises second support device 7, it is diametrically opposed to be rigidity in support device 5, and between rotatable parts 1 and stator component 2, transmit these other power, and distortion diametrically is as far as possible little.In a preferred embodiment, second support device 7 is formed by an annular solid, and it is connected in bearing means 3,4 and extends around the latter.Therefore, support device 7 is roughly concentric with the spin axis 6 of bearing means 3,4 and rotatable parts 1.Point between the surface and the latter of stator component 2 at support device 7, be no more than expectation by the power of the level of the maximum, force of first support device, 5 absorptions as long as between rotatable parts 1 and stator component 2, have, between an apparent surface 9 of this surface 8 and stator component 2, just have one apart from e.This just means that when contact occurring between first support device 5 is deformed to surperficial 8 and 9 diametrically, all further power or stress between rotatable parts 1 and the stator component 2 all transmit between these two by second support device 7.
Also can consider to make surface or the coupled part of support device 7 as bearing means 3.When support device was in its inactive state, this part left a distance to a respective surfaces of a stator component 2 or a coupled part, and this distance is eliminated under the active state of second support device 7, thereby make between these surfaces contact has been arranged.
Should illustrate that this is very little apart from e diameter with respect to the rotatable parts that comprise its rotor blade under the situation that rotary machine for example is made of a gas turbine.When the magnitude of described diameter, be preferably the magnitude of a few tenths of millimeter apart from e at one meter.
And then stator component 2 is provided with path 10 as seen from Figure 3, is used to flow through a kind of working medium of rotary machine of flowing through.This medium can be any medium that comprises steam and gas, and this medium requires to have a high temperature.Therefore, expect easily near rotatable parts 1 and stator component 2, can occurrence temperature influencing the dimensional changes of being brought out, because when the medium that flows passes these path 10s, can heat the part 11 adjacent with these path 10s.The device of being invented is specially adapted to such one type rotary machine.
Certainly, can in framework of the present invention, make many improvement and variation under the prerequisite that does not deviate from scope of the present invention to described device.Can mention as an example, first and second support devices 5 can have the different structure of many kinds respectively with 7, and the structure that is respectively a truncated cone and an annular solid is related preferred embodiment this moment, but only illustrates as an example at this.Certainly, when second support device 7 constituting as shown in the figure by an annular solid, it is connected in a stator component or a coupled part under inactive state, and and bearing means 3 between have a distance, and in that they are supported on a bearing means 3 or the coupled part under its active state, thereby between stator component 2 and rotary component 1, form a power transfer unit.
Claims (15)
1. device that is used for rotary machine, this rotary machine comprises a stator component (2) and the rotatable parts by its support (1), and first support device (5) is set absorbs between stator component (2) and the rotatable parts (1) power that occurs, it is characterized in that: be provided with second support device (7), when rotatable parts (1) that absorbed when first support device (5) and the power between the stator component (2) reached certain level, second support device absorbed the power that surpasses this level.
2. device as claimed in claim 1 is characterized in that: first device (5) and second installs (7) and is arranged between rotatable parts (1) and the stator component (2).
3. device as claimed in claim 1 or 2, it is characterized in that: first support device (5) comprises one first supporting element, it is arranged to absorb because the caused power of dimensional changes of at least one in stator component and the rotatable parts by a resiliently deformable.
4. described device of each claim as described above, it is characterized in that: second support device (7) comprises one second supporting element, it absorbs on the direction with respect to first support device (5) in a load is rigidity.
5. described device of each claim as described above, it is characterized in that: first support device (5) and second support device (7) be arranged in parallel.
6. described device of each claim as described above, it is characterized in that: first support device (5) is arranged to absorb because the temperature effect that exists in the rotary machine, by at least one the caused power of dimensional changes in rotatable parts (1) and the stator component (2).
7. described device of each claim as described above, it is characterized in that: the level of described power is corresponding to equal gravity and because the level of the power sum that the Temperature Influence that exists in the rotary machine occurs that rotor acts on first support device (5) between rotatable parts (1) and stator component (2).
8. described device of arbitrary as described above claim, it is characterized in that: first support device (5) is connected in stator component (2) with a surface, and being connected in bearing means (3,4) with a second surface, rotatable parts (1) are supported in the described bearing means rotationally.
9. described device of each claim as described above, it is characterized in that: second support device (7) is arranged on stator component (12) and supports rotationally between the bearing means (3,4) of rotatable parts (1), when second support device (7) when being in unsupported state, itself and between one of stator component (2) and bearing means (3,4) a distance (e) is arranged at least.
10. described device of each claim as described above, it is characterized in that: second support device (7) is arranged on stator component (2) and supports rotationally between the bearing means (3,4) of rotatable parts (1), and be arranged in its activity suction stress phase lower support the two.
11. described device of each claim as described above, it is characterized in that: first support device comprises that one is arranged on the annular solid between stator component (2) and the bearing means (3,4), described annular solid is connected to bearing means (3,4) and stator component (2) at its opposed end, and has the part of at least one conical design.
12. the described device of each claim as described above, it is characterized in that: second support device (7) comprises an annular support member, and is provided with around a bearing means (3,4) that is used for rotatable parts 1.
13. the described device of each claim as described above, it is characterized in that: stator component (2) is provided with the passage (10) that is used for a thermal medium and flows through rotary machine.
14. a device as claimed in claim 13 is characterized in that: first support device (5) and second support device (7) are arranged on the footpath of stator component (2) and upwards extend and cross on the part (11) of these passages (10).
15. the described device of each claim as described above, it is characterized in that: this rotary machine is a kind of turbine engine, and it is driven by one of medium that comprises steam and combustion gas.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE9701987A SE509392C2 (en) | 1997-05-27 | 1997-05-27 | Device for a rotor machine |
| SE9701987 | 1997-05-27 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1200430A true CN1200430A (en) | 1998-12-02 |
Family
ID=20407110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97114512 Pending CN1200430A (en) | 1997-05-27 | 1997-07-11 | Device for rotary machine |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN1200430A (en) |
| SE (1) | SE509392C2 (en) |
| WO (1) | WO1998054443A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101523066B (en) * | 2006-10-02 | 2011-11-16 | 美佐纸业股份有限公司 | Rotary machinery of refiner |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2864995B1 (en) | 2004-01-12 | 2008-01-04 | Snecma Moteurs | DOUBLE RAIDEUR BEARING SUPPORT |
| DE102011080820A1 (en) * | 2011-08-11 | 2013-02-14 | Siemens Aktiengesellschaft | Method for producing a machine element and machine element, in particular shaft bearings |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1421377A (en) * | 1972-04-18 | 1976-01-14 | Rolls Royce | Bearing assemblies |
| US4268220A (en) * | 1979-03-05 | 1981-05-19 | General Motors Corporation | Thrust balancing |
| US5433584A (en) * | 1994-05-05 | 1995-07-18 | Pratt & Whitney Canada, Inc. | Bearing support housing |
| US5603602A (en) * | 1994-08-08 | 1997-02-18 | Pratt & Whitney Canada Inc. | Pressurized ball bearing assemblies |
-
1997
- 1997-05-27 SE SE9701987A patent/SE509392C2/en not_active IP Right Cessation
- 1997-07-11 CN CN 97114512 patent/CN1200430A/en active Pending
-
1998
- 1998-05-27 WO PCT/SE1998/001007 patent/WO1998054443A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101523066B (en) * | 2006-10-02 | 2011-11-16 | 美佐纸业股份有限公司 | Rotary machinery of refiner |
Also Published As
| Publication number | Publication date |
|---|---|
| SE9701987L (en) | 1998-11-28 |
| SE9701987D0 (en) | 1997-05-27 |
| SE509392C2 (en) | 1999-01-18 |
| WO1998054443A1 (en) | 1998-12-03 |
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Legal Events
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |