CN204002950U - A kind of turbine bearing pad oil shelves - Google Patents
A kind of turbine bearing pad oil shelves Download PDFInfo
- Publication number
- CN204002950U CN204002950U CN201420366076.1U CN201420366076U CN204002950U CN 204002950 U CN204002950 U CN 204002950U CN 201420366076 U CN201420366076 U CN 201420366076U CN 204002950 U CN204002950 U CN 204002950U
- Authority
- CN
- China
- Prior art keywords
- shelves
- bearing pad
- turbine bearing
- seal area
- oil
- 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.)
- Expired - Fee Related
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model provides a kind of turbine bearing pad oil shelves to comprise: external sealed shelves and interior sealing shelves, its feature is being, is arranged between seal area, and is filled with pressurized air in seal area between described external sealed shelves and interior sealing shelves.Utilize the seal action of gas, effectively stop bearing housing outside air carrying the materials such as dust and enter bearing housing, prevent leaking outside of turbo-engine lube simultaneously; And the lower pressurized air of temperature is by cooling well between relevant position to oil shelves body and macro-axis, avoids carbonization.
Description
Technical field
The utility model relates to the technical field of power station turbine bearing pad, relates in particular to a kind of turbine bearing pad oil shelves.
Background technique
This large-scale conveyer of steam turbine and generator all can arrange in rotating shaft both sides the seal arrangement that rotating shaft is used, and this seal arrangement is generally the oily latch device of title
Traditional main comb teeth shape sealing tooth that relies on of steam turbine comb formula oil shelves reaches the object that prevents oil leak, this oil shelves move under negative pressure, when the distance of oil shelves and cylinder end is too closely time, oil shelves can be subject to the radiation heat of cylinder end and rotor, inventor tests in prior art realizing in the utility model process, and when main steam temperature is 540 °, the temperature of steam turbine cylinder end is 332 °, macro-axis temperature is 330 °, and oil shelves temperature outside is 193 °.And when in prior art, oil shelves move under negative pressure state, air is carrying dust magazine and is being easy to enter and oil shelves position, dust will accumulate in oil shelves position, lubricant oil has just formed greasy filth together with mix dust, after high-temperature baking, will be carbonized, carbide is cumulative, will cause dynamic and static gaps to reduce and touch mill, brings serious potential safety hazard to the operation of steam turbine; And gather when serious when carbide, can frequently there is intermittent vibration in bearing shell.
Inventor finds realizing in process of the present utility model, also there are some technical problems in oil shelves of the prior art: comb-shaped oil catch seal is also poor, be 0.15-0.25mm by designing requirement oil catch gap left and right side, bottom is 0.05-0.10mm, top is: 0.20mm left and right, but work as above-mentioned bearing shell, intermittent vibration can frequently occur, be easy to cause the wearing and tearing of copper broach, thereby easily produce, steam turbine oil leakage is caught fire and hidden danger produces.
Model utility content
In order to solve the technical problem existing in above-mentioned turbine bearing pad oil shelves, the utility model provides a kind of turbine bearing pad oil shelves that prevent bearing shell vibration.
A kind of turbine bearing pad oil shelves that the utility model provides comprise: external sealed shelves and interior sealing shelves, its feature is being, is arranged between seal area, and is filled with pressurized air in seal area between described external sealed shelves and interior sealing shelves.
Preferably, between above-mentioned seal area, comprise a groove between external sealed shelves and interior sealing shelves, and be positioned at the inlet hole passage of groove top.
Preferably, above-mentioned inlet hole passage is zigzag.
Preferably, between above-mentioned seal area, outside ingress is provided with filter screen.
Preferably, above-mentioned compressed-air actuated temperature is 70～80 °.
Preferably, above-mentioned pressurized air is barotropic gas.
Preferably, the pressurized air entering between described seal area is clean and dry gas after filtering.
After adopting above-mentioned preferably technological scheme, utilize the seal action of gas, effectively stop bearing housing outside air carrying the materials such as dust and enter bearing housing, prevent leaking outside of turbo-engine lube simultaneously.The lower pressurized air of temperature, by cooling well between relevant position to oil shelves body and macro-axis, is avoided carbonization.And barotropic gas, can more effectively organize the impact of the external gas pressure.Thereby avoid the technical problem of the vibration of prior art intermediate bushing and broach wearing and tearing.
Brief description of the drawings
Fig. 1 is the structural representation that the utility model embodiment relates to a kind of turbine bearing pad oil shelves;
Fig. 2 is the sectional view that the utility model embodiment relates to the sealing of a kind of turbine bearing pad oil shelves;
Fig. 3 is the sealing principle figure that the utility model embodiment relates to a kind of turbine bearing pad oil shelves.
Fig. 4 is the vibration-testing plotted curve of a kind of turbine bearing pad in prior art;
Fig. 5 is the vibration-testing plotted curve that the utility model embodiment relates to a kind of turbine bearing pad.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, it should be noted that, these specific descriptions just allow those of ordinary skill in the art be more prone to, clearly understand the utility model, but not to limited explanation of the present utility model.
Embodiment
As shown in Figure 1 and Figure 2, preferably, the present embodiment provides a kind of turbine bearing pad oil shelves 1 to comprise external sealed shelves 2 and interior sealing shelves 3, on external sealed shelves 2 and interior sealing shelves 3, is respectively arranged with the teeth 20,30 that macro-axis coordinates; And between external sealed shelves 2 and interior sealing shelves 3, be arranged between seal area, in seal area, be filled with pressurized air; Between seal area, comprising a groove 6 between external sealed shelves 2 and interior sealing shelves 3, and be positioned at the inlet hole passage 4,5 of groove 6 tops, gas-entered passageway 5 is directly connected with groove 6, and whole inlet hole passage is indentation, is more conducive to like this allow gas be kept in seal area.
Preferably, ingress outside between above-mentioned seal area is provided with filter screen, can further provide the clean level of gas in oil shelves 1 seal area by entering into the present embodiment like this.
Preferably, above-mentioned compressed-air actuated temperature is 70～80 °; Pressurized air is barotropic gas, and the pressurized air entering between described seal area is clean and dry gas after filtering.As shown in Figure 2 and Figure 3, between external sealed shelves 2 and interior sealing shelves 3 and bearing, by turbine oil 7,8, the air in seal area and outside air are completely cut off; During bearing housing outside 9 and bearing inner side 10 air B just can not enter between seal area like this.And employing barotropic gas, the pressure of the interior gas A in seal area is greater than the pressure of extraneous gas B like this, and it is more difficult that extraneous gas will enter oil shelves 1 inside like this.
Therefore, the oil shelves 1 in the present embodiment utilize the seal action of gas, effectively stop bearing housing outside 9 air carrying the materials such as dust and enter bearing housing, prevent leaking outside of turbo-engine lube simultaneously; And the lower pressurized air of temperature is by cooling well between relevant position to oil shelves body and macro-axis, avoid carbonization.
As Fig. 4 can find out, the vibration of prior art intermediate bushing is very large, and maximum can reach 0.145mm, and is intermittent vibration; So just increase the probability of oily shelves leakage of oil.As shown in Figure 5, the vibration maximum of this enforcement intermediate bushing is also no more than 0.05mm, and vibration so is by a small margin very even, can not have influence on the normal work of bearing shell.
Utilize the seal action of gas, effectively stop bearing housing outside air carrying the materials such as dust and enter bearing housing, prevent leaking outside of turbo-engine lube simultaneously.
Finally it should be noted that, above-mentioned explanation is only most preferred embodiment of the present utility model, not the utility model is done to any pro forma restriction.Any those of ordinary skill in the art; do not departing within the scope of technical solutions of the utility model; all can utilize way and the technology contents of above-mentioned announcement to make many possible variations and simple replacement etc. to technical solutions of the utility model, these all belong to the scope of technical solutions of the utility model protection.
Claims (7)
1. turbine bearing pad oil shelves, comprising: external sealed shelves and interior sealing shelves, its feature is being, is arranged between seal area, and is filled with pressurized air in seal area between described external sealed shelves and interior sealing shelves.
2. turbine bearing pad oil shelves as claimed in claim 1, is characterized in that, comprise a groove between described external sealed shelves and described interior sealing shelves between described seal area, and are positioned at the inlet hole passage of groove top.
3. turbine bearing pad oil shelves as claimed in claim 2, is characterized in that, described inlet hole passage is zigzag.
4. turbine bearing pad oil shelves as claimed in claim 1, is characterized in that, ingress outside between described seal area is provided with filter screen.
5. turbine bearing pad oil shelves as claimed in claim 1, is characterized in that, described compressed-air actuated temperature is 70～80 °.
6. turbine bearing pad oil shelves as claimed in claim 1, is characterized in that, described pressurized air is barotropic gas.
7. turbine bearing pad oil shelves as claimed in claim 1, is characterized in that, the pressurized air entering between described seal area is clean and dry gas after filtering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420366076.1U CN204002950U (en) | 2014-07-03 | 2014-07-03 | A kind of turbine bearing pad oil shelves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420366076.1U CN204002950U (en) | 2014-07-03 | 2014-07-03 | A kind of turbine bearing pad oil shelves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204002950U true CN204002950U (en) | 2014-12-10 |
Family
ID=52042968
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420366076.1U Expired - Fee Related CN204002950U (en) | 2014-07-03 | 2014-07-03 | A kind of turbine bearing pad oil shelves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204002950U (en) |
-
2014
- 2014-07-03 CN CN201420366076.1U patent/CN204002950U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141210 Termination date: 20150703 |
|
| EXPY | Termination of patent right or utility model |