CN219452191U - Steam turbine coupling guard shield - Google Patents
Steam turbine coupling guard shield Download PDFInfo
- Publication number
- CN219452191U CN219452191U CN202320683236.4U CN202320683236U CN219452191U CN 219452191 U CN219452191 U CN 219452191U CN 202320683236 U CN202320683236 U CN 202320683236U CN 219452191 U CN219452191 U CN 219452191U
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- oil
- side flange
- turbine
- housing
- seal ring
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Abstract
The utility model provides a turbine coupling shield which comprises a shield main body, a generator side flange and a turbine side flange, wherein the shield main body is formed by butt joint of an upper shield and a lower shield, the generator side flange and the turbine side flange are split type flanges, the generator side flange and the turbine side flange are respectively connected with two ends of the shield main body, a first oil baffle and a second oil baffle which are matched with a coupling are respectively arranged on the generator side flange and the turbine side flange, an air inlet is arranged on the shield main body at the outer side of the generator side flange or the turbine side flange, an exhaust pipe is arranged at the top of the upper shield, an oil exhaust pipe is arranged at the bottom of the lower shield, the air inlet is connected with an instrument air pipeline, and the oil exhaust pipe is connected with a turbine oil tank. The utility model can reduce oil leakage and effectively cool the coupler in the shield.
Description
Technical Field
The utility model relates to the technical field of steam turbines, in particular to a coupler shield of a steam turbine.
Background
The rotor of the turbine is connected with the generator through a coupler, and the coupler rotates along with the turbine at a high speed to transmit the power of the turbine to the generator.
In order to ensure the safety of the coupler during high-speed rotation, a closed housing is required to be installed on the coupler of the steam turbine, but because the coupler can generate a blowing effect in a closed space, namely, lubricating oil of a bearing cover of the steam turbine on one side of the housing is sucked into the housing along the direction of the coupler, and sucked oil is sprayed out from one side of a generator of the housing under the drive of the coupler rotating at high speed, so that the oil dripping phenomenon is caused.
The patent application number CN202221617871.4 discloses a novel turbine coupling housing, through installing two oil baffles additional in one side of coupling housing, the resistance that oil produced when increasing the blast effect that the coupling caused, the oil-out that links to each other with the turbine oil tank is installed to the housing bottom simultaneously, retrieves the oil in the coupling housing. The coupler housing, while solving the problem of avoiding oil blowout, still has the following disadvantages:
1. as can be seen from the patent document, the double oil baffles are arranged on the side of the housing close to the generator, so as to increase the resistance and prevent the oil and gas from escaping from the side of the generator, and the problem of oil leakage on the side of the turbine of the housing is not solved; 2. when the coupler rotates at a high speed, the air in the housing is driven to rub with the housing, the generated heat can be cooled by self-heating only through the housing and the external air, the coupler and the housing can not be cooled effectively, and the environment is unfavorable for the operation of the coupler in the housing.
Disclosure of Invention
In order to solve the defects in the prior art, the utility model provides a steam turbine coupling shield which can reduce oil leakage and can effectively cool a coupling.
The technical scheme of the utility model is as follows: the utility model provides a steam turbine shaft coupling guard shield, includes housing main part, generator side flange and turbine side flange, the housing main part is formed by last housing and lower housing butt joint, generator side flange and turbine side flange are split type flange, and generator side flange and turbine side flange are connected with housing main part both ends respectively, install respectively with shaft coupling complex first fender oil piece and second fender oil piece in generator side flange and the turbine side flange, be equipped with the air inlet on the housing main part in generator side flange or the turbine side flange outside, go up the housing top and install the blast pipe, oil pipe is installed to lower housing bottom, the air inlet links to each other with the instrument tuber pipe way, oil pipe links to each other with the steam turbine oil tank. The first oil baffle part and the second oil baffle part respectively realize blocking of oil inlet on the turbine side and oil outlet on the generator side, so that leakage and emission of oil are reduced, instrument wind is connected to the air inlet, convection cooling is performed in the shield, and meanwhile, the entering of the instrument wind can indirectly offset negative pressure generated by the blowing effect of the hub of the coupling, so that leakage of the oil into the shield is reduced.
The first oil baffle piece comprises an annular plate and an oil baffle ring, the annular plate is formed by butt joint of two semicircular mounting plates, the outer sides of the semicircular mounting plates are respectively fixed at the joints of the upper housing and the lower housing and the side flange of the steam turbine, at least two slots concentric with the semicircular mounting plates are formed in the inner sides of the semicircular mounting plates, the outer sides of the oil baffle rings are inserted into the slots, and the outer sides of the oil baffle rings are sleeved on the coupler.
An oil return channel is arranged in the semicircular mounting plate fixed on the lower housing, one end of the oil return channel is communicated with the inner surface of the semicircular mounting plate between the adjacent slots, and the other end of the oil return channel is communicated with one side of the semicircular mounting plate, facing the steam turbine. The arrangement of the oil retaining rings improves the oil retaining efficiency, and meanwhile, the oil return channels can enable the oil entering the oil retaining rings along the coupler to return to the bearing cover of the steam turbine along the oil return channels.
The second oil baffle is an oil seal ring, the oil seal ring is formed by butt joint of an upper oil seal ring and a lower oil seal ring, the outer sides of the upper oil seal ring and the lower oil seal ring are respectively fixed at the joint of an upper housing and a lower housing and a flange at the generator side, and the inner sides of the upper oil seal ring and the lower oil seal ring are sleeved on a coupler.
The air inlet is arranged at two ends of the lower housing, and the air regulating valve is arranged on the air pipeline of the instrument. The air inlet is positioned on the lower housing, the exhaust pipe is positioned on the upper housing, and the convection cooling effect in the shield is ensured.
And an oil discharge valve is arranged on the oil discharge pipe. The oil discharge valve is used for adjusting the oil return quantity in the coupler shield, so that the coupler shield is not accumulated with oil, and the negative pressure is prevented from being excessively high, so that air impurities and water in the air are prevented from being sucked, and the oil quality of the steam turbine is influenced.
The two sides of the upper housing and the lower housing are respectively provided with a connecting plate, and the connecting plates are fixedly connected through bolts.
The beneficial effects of the utility model are as follows:
the first oil baffle and the second oil baffle are arranged to respectively block the oil inlet at the turbine side and the oil outlet at the generator side, so that leakage and overflow of oil are reduced; by accessing instrument wind into the shield from the air inlet, convection cooling is carried out in the shield, and the heat dissipation efficiency of the coupler is improved; meanwhile, the entering of instrument wind can indirectly offset negative pressure generated by the blowing effect of the hub of the coupler, so that the leakage of oil into the shield is reduced.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an exploded view of the present utility model;
FIG. 3 is a cross-sectional view of the present utility model;
fig. 4 is a partial enlarged view of a in fig. 2.
Reference numerals: 1. an upper housing; 11. an exhaust pipe; 12. a connecting plate; 2. a lower housing; 21. an oil drain pipe; 22. an air inlet; 3. a turbine side flange; 31. a semicircular mounting plate; 32. an oil return passage; 33. a slot; 4. a generator side flange; 5. a coupling; 6. oil slinger; 7. an oil discharge valve; 8. an instrument wind pipeline; 9. an air regulating valve; 10. and (5) a bolt.
Detailed Description
In order to make the technical solution of the present utility model better understood by those skilled in the art, the following description is made in detail with reference to the accompanying drawings, and other embodiments obtained by those skilled in the art without making any inventive effort are all within the scope of the present utility model.
As shown in fig. 1 to 3, the utility model provides a turbine coupling shield, which comprises a shield main body, a generator side flange 4 and a turbine side flange 3, wherein the shield main body is formed by butting an upper shield 1 and a lower shield 2, two sides of the upper shield 1 and the lower shield 2 are respectively provided with a connecting plate 12, the connecting plates 12 are fixedly connected through bolts 10, the generator side flange 4 and the turbine side flange 3 are split type flanges and are respectively fixedly connected with two ends of the shield main body, a first oil baffle and a second oil baffle which are matched with a coupling 5 are respectively arranged on the generator side flange 4 and the turbine side flange 3, and the turbine side oil inlet and the generator side oil outlet are respectively blocked through the first oil baffle and the second oil baffle, so that leakage and oil outlet of oil quality are reduced; an air inlet 22 is arranged on the housing main body outside the generator side flange 4 or the turbine side flange 3, an exhaust pipe 11 is arranged at the top of the upper housing 1, an oil discharge pipe 21 is arranged at the bottom of the lower housing 2, the air inlet 22 is connected with an instrument wind pipeline 8, the oil discharge pipe 21 is connected with a turbine oil tank, instrument wind enters from the air inlet 22, and is discharged from the exhaust pipe 11 after convection cooling in the shield, preferably, the air inlet 22 is arranged at two ends of the lower housing 2 in order to ensure the effect of convection cooling in the shield; the entry of the instrument wind can also indirectly counteract the negative pressure generated in part by the hub blowing effect of the coupling 5, thereby reducing the leakage of oil into the shield.
The first oil baffle piece comprises an annular plate and an oil baffle ring 6, the annular plate is formed by butt joint of two semicircular mounting plates 31, the outer sides of the semicircular mounting plates 31 are respectively fixed at the joints of the upper housing 1 and the lower housing 2 and the turbine side flange 3, at least two slots 33 concentric with the semicircular mounting plates 31 are formed in the inner sides of the semicircular mounting plates 31, the outer sides of the oil baffle rings 6 are inserted into the slots 33, and the outer sides of the oil baffle rings 6 are sleeved on the coupler 5.
As shown in fig. 4, an oil return channel 32 is disposed in the semicircular mounting plate 31 fixed on the lower casing 2, one end of the oil return channel 32 is communicated with the inner surface of the semicircular mounting plate between adjacent slots 33, and the other end of the oil return channel 32 is communicated with one side of the semicircular mounting plate 31 facing the steam turbine. The arrangement of the plurality of oil retaining rings 6 improves the oil retaining efficiency, and meanwhile, the arrangement of the oil return channels 32 can enable oil entering between the oil retaining rings 6 along the coupler 5 to return into the bearing cover of the steam turbine along the oil return channels 32.
The second oil baffle is an oil seal ring 41, the oil seal ring is formed by butt joint of an upper oil seal ring and a lower oil seal ring, the outer sides of the upper oil seal ring and the lower oil seal ring are respectively fixed at the joint of an upper housing 1 and a lower housing 2 and a generator side flange 4, the inner sides of the upper oil seal ring and the lower oil seal ring are sleeved on a coupler 5, and a gap of 0.6+/-0.1 mm exists between the surfaces of the oil seal ring 41 and an oil baffle ring 6 and the coupler 5, so that the outer surface of the coupler 5 is not contacted with the oil seal ring 41 and the oil baffle ring 6, and the coupler 5 can be ensured to normally rotate while oil is blocked.
The instrument air pipeline 8 is provided with the air regulating valve 9, the instrument air flow entering the shield is regulated through the air regulating valve 9, the pressure of 4-5bar is usually maintained, waste caused by overlarge air pressure is avoided, meanwhile, instrument air is clean and dry air, and the air cleanliness in the shield is improved.
The oil drain pipe 21 is provided with an oil drain valve 7. The oil discharge valve 7 is used for adjusting the oil return amount in the coupler shield, so that the coupler shield is ensured not to form accumulated oil, and the negative pressure is prevented from being excessively high, so that air impurities and water in the air are prevented from being sucked, and the oil quality of the steam turbine is influenced.
When the technical scheme is implemented, the lower housing 2 is arranged below the position to be installed of the coupler 5, the oil drain pipe 21 is connected with the turbine oil tank, the oil retainer 6 is sleeved on one side of the coupler 5 close to the turbine in advance, after the two ends of the coupler 5 are respectively in butt joint with the output shafts of the turbine rotor and the generator, the upper housing 1 is covered above the coupler 5, the oil retainer 6 is clamped into the annular plate slot 33 on the flange 3 on the turbine side, the upper housing 1 and the lower housing 2 are locked and fixed through the connecting plate 12 after being in butt joint through the bolts 10, the flanges at the two ends are respectively connected with the shells of the turbine and the generator through bolts, the instrument air pipeline 8 is connected into the air inlet 22, the air regulating valve 9 and the oil drain valve 7 are adjusted to required opening degrees, and the installation of the turbine coupler guard is completed.
Claims (7)
1. The utility model provides a steam turbine shaft coupling guard shield, includes housing main part, generator side flange and turbine side flange, the housing main part is formed by last housing and lower housing butt joint, generator side flange and turbine side flange are split type flange, and generator side flange and turbine side flange are connected with housing main part both ends respectively, its characterized in that, install respectively with shaft coupling complex first fender oil piece and second fender oil piece in generator side flange and the turbine side flange, be equipped with the air inlet in the housing main part in generator side flange or the turbine side flange outside, go up the housing top and install the blast pipe, down the housing bottom install oil drain pipe, the air inlet links to each other with the instrument tuber pipe way, oil drain pipe links to each other with the steam turbine oil tank.
2. The steam turbine coupling shield according to claim 1, wherein the first oil retaining member comprises an annular plate and an oil retaining ring, the annular plate is formed by butting two semicircular mounting plates, the outer sides of the semicircular mounting plates are respectively fixed at the joints of the upper cover shell and the lower cover shell and the side flange of the steam turbine, at least two slots concentric with the semicircular mounting plates are formed in the inner sides of the semicircular mounting plates, the outer sides of the oil retaining rings are inserted into the slots, and the outer sides of the oil retaining rings are sleeved on the coupling.
3. The turbine coupling shroud of claim 2, wherein the semicircular mounting plate fixed to the lower housing is provided with an oil return passage therein, one end of the oil return passage is communicated with an inner surface of the semicircular mounting plate between adjacent slots, and the other end of the oil return passage is communicated with one side of the semicircular mounting plate facing the turbine.
4. The turbine coupling shroud of claim 1, wherein the second oil retaining member is an oil seal ring, the oil seal ring is formed by butting an upper oil seal ring and a lower oil seal ring, the outer sides of the upper oil seal ring and the lower oil seal ring are respectively fixed at the connection parts of the upper housing and the lower housing and the generator side flange, and the inner sides of the upper oil seal ring and the lower oil seal ring are sleeved on the coupling.
5. The steam turbine coupling shield according to claim 1, wherein the air inlet is formed at two ends of the lower housing, and the air regulating valve is installed on the air pipeline of the instrument.
6. The turbine coupling shroud of claim 1, wherein said oil drain pipe has an oil drain valve mounted thereon.
7. The steam turbine coupling shield according to claim 1, wherein connecting plates are respectively arranged on two sides of the upper cover shell and the lower cover shell, and the connecting plates are fixedly connected through bolts.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320683236.4U CN219452191U (en) | 2023-03-31 | 2023-03-31 | Steam turbine coupling guard shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320683236.4U CN219452191U (en) | 2023-03-31 | 2023-03-31 | Steam turbine coupling guard shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219452191U true CN219452191U (en) | 2023-08-01 |
Family
ID=87381476
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320683236.4U Active CN219452191U (en) | 2023-03-31 | 2023-03-31 | Steam turbine coupling guard shield |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219452191U (en) |
-
2023
- 2023-03-31 CN CN202320683236.4U patent/CN219452191U/en active Active
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