CN215633173U - Negative pressure type oil gear of steam turbine main engine - Google Patents
Negative pressure type oil gear of steam turbine main engine Download PDFInfo
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- CN215633173U CN215633173U CN202121712835.1U CN202121712835U CN215633173U CN 215633173 U CN215633173 U CN 215633173U CN 202121712835 U CN202121712835 U CN 202121712835U CN 215633173 U CN215633173 U CN 215633173U
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Abstract
The utility model provides a negative pressure type oil gear of a steam turbine main engine, and mainly relates to the field of negative pressure type oil gears. The utility model provides a steam turbine host computer negative pressure formula oil shelves, includes the pivot, the sealed tooth of pivot periphery suit, form the cavity between sealed tooth and the pivot, sealed tooth outside is equipped with the pressure-equalizing groove, the pressure-equalizing hole is seted up to the pressure-equalizing inslot side, its the air inlet is seted up on pressure-equalizing groove upper portion, the pivot periphery is equipped with annular cavity, the annular cavity bottom is equipped with the exhaust hole. The utility model has the beneficial effects that: the utility model has simple structure and convenient use, can prevent turbine oil in the bearing box from leaking, and can prevent outside steam water from entering the bearing box to emulsify lubricating oil, thereby improving the sealing property of the bearing box and the service performance of a steam turbine main engine.
Description
Technical Field
The utility model mainly relates to the field of negative pressure type oil gears, in particular to a negative pressure type oil gear of a main engine of a steam turbine.
Background
The sealing oil barriers applied to the steam turbine of a power plant, the generator and the two sides of the auxiliary machine bearing box of the steam turbine adopt a fixed copper tooth sheet type or a disc root type structure. From the field situation, the oil shield has oil leakage phenomena of different degrees, which not only pollutes the field, but also can cause fire if the oil shield drips on a high-pressure cylinder or an exhaust pipe, and seriously threatens the safe operation of the unit.
The oil baffle has different degrees of abrasion at the position from the condition of shutdown maintenance, and the main reason of the conditions is that the oil baffle can rub a rotor when a gap between the oil baffle and a shaft is small, so that the rotor and the oil baffle are abraded; the excessive clearance can cause the leakage of lubricating oil, also easily causes the bearing seal to leak vapour and gets into the bearing box, causes lubricating oil emulsification rotten, influences the normal operating of unit.
The negative pressure type oil baffle aims at the defects of the original comb tooth type oil baffle, a strand of clean, purified, normal-temperature and constant-pressure compressed air is introduced into the middle part of the main machine comb tooth sealing oil baffle of the original power plant or the middle part of the improved sealing oil baffles in various forms, an air outlet channel is added, and an air sealing cavity is formed in the middle of the inner baffle and the outer baffle. The air pressure seal is utilized to effectively prevent steam outside the bearing box from leaking into the bearing box, and the problem of water inflow in oil is solved. The turbine oil in the bearing box can be effectively sealed in the bearing box, and the turbine oil is prevented from leaking outwards. And the shaft has good cooling effect, so that the problem of high-temperature carbon deposition at the oil shield part is well solved, and the method is a good method for solving the vibration of the unit caused by the problem.
SUMMERY OF THE UTILITY MODEL
The utility model provides a negative pressure type oil gear of a steam turbine main engine, which is simple in structure and convenient to use, can prevent turbine oil in a bearing box from leaking, and can prevent outside steam water from entering the bearing box to emulsify lubricating oil, thereby improving the sealing property of the bearing box and the service performance of the steam turbine main engine.
In order to achieve the purpose, the utility model is realized by the following technical scheme:
the utility model provides a steam turbine host computer negative pressure formula oil shelves, includes the pivot, the sealed tooth of pivot periphery suit, form the cavity between sealed tooth and the pivot, sealed tooth outside is equipped with the pressure-equalizing groove, the pressure-equalizing hole is seted up to the pressure-equalizing inslot side, its the air inlet is seted up on pressure-equalizing groove upper portion, the pivot periphery is equipped with annular cavity, the annular cavity bottom is equipped with the exhaust hole.
Further, a filter is arranged on the outer side of the exhaust hole.
Compared with the prior art, the utility model has the beneficial effects that:
the utility model has simple structure and convenient use, can prevent turbine oil in the bearing box from leaking, and can prevent outside steam water from entering the bearing box to emulsify lubricating oil, thereby improving the sealing property of the bearing box and the service performance of a steam turbine main engine.
Drawings
FIG. 1 is a schematic structural view of the present invention;
reference numerals shown in the drawings: 1. an air inlet; 2. a pressure equalizing groove; 3. a seal tooth; 4. a pressure equalizing hole; 5. an annular chamber; 6. an exhaust hole; 7. a filter; 8. a rotating shaft.
Detailed Description
The utility model is further described with reference to the accompanying drawings and specific embodiments. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.
As shown in fig. 1, the negative pressure type oil gear of the steam turbine main engine comprises a rotating shaft 8, wherein a sealing tooth 3 is sleeved on the periphery of the rotating shaft 8, a cavity is formed between the sealing tooth 3 and the rotating shaft 8, a pressure equalizing groove 2 is arranged outside the sealing tooth 3, a pressure equalizing hole 4 is formed in the inner side of the pressure equalizing groove 2, an air inlet 1 is formed in the upper portion of the pressure equalizing groove 2, an annular cavity 5 is arranged on the periphery of the rotating shaft 8, and an exhaust hole 6 is formed in the bottom of the annular cavity 5.
Specifically, a filter 7 is installed outside the exhaust hole 6. By installing the filter 7, the compressed air is conveniently filtered for recycling.
Example (b):
when the device is used, clean and dry compressed air is firstly introduced into the air inlet 1, the compressed air enters the pressure equalizing groove 2 and then the pressure equalizing groove 2 is filled with the compressed air with the same pressure, the compressed air enters the cavity formed between the sealing teeth 3 and the rotating shaft through the pressure equalizing holes 4, a part of the compressed air flows out to the outer side to form air film sealing, so that air water on the outer side does not enter the bearing box, a part of the compressed air flows into the inner side to form air film sealing, so that turbine oil in the bearing box cannot be discharged out of the bearing box, the compressed air flowing to the inner side enters the inner side annular cavity 5 and then is discharged through the exhaust holes 6, and the compressed air enters the filter 7 to collect discharged oil-gas mixture and is recycled into the oil return pipe of the sealing oil box.
The utility model has simple structure and convenient use, can prevent turbine oil in the bearing box from leaking, and can prevent outside steam water from entering the bearing box to emulsify lubricating oil, thereby improving the sealing property of the bearing box and the service performance of a steam turbine main engine.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (2)
1. The utility model provides a steam turbine host computer negative pressure formula oil shelves, includes pivot (8), its characterized in that: the sealing structure is characterized in that sealing teeth (3) are sleeved on the periphery of the rotating shaft (8), a cavity is formed between the sealing teeth (3) and the rotating shaft (8), a pressure equalizing groove (2) is arranged outside the sealing teeth (3), a pressure equalizing hole (4) is formed in the inner side of the pressure equalizing groove (2), an air inlet (1) is formed in the upper portion of the pressure equalizing groove (2), an annular cavity (5) is arranged on the periphery of the rotating shaft (8), and an exhaust hole (6) is formed in the bottom of the annular cavity (5).
2. The negative pressure type oil gear of the main engine of the steam turbine according to claim 1, characterized in that: and a filter (7) is arranged on the outer side of the exhaust hole (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121712835.1U CN215633173U (en) | 2021-07-26 | 2021-07-26 | Negative pressure type oil gear of steam turbine main engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121712835.1U CN215633173U (en) | 2021-07-26 | 2021-07-26 | Negative pressure type oil gear of steam turbine main engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215633173U true CN215633173U (en) | 2022-01-25 |
Family
ID=79892467
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121712835.1U Active CN215633173U (en) | 2021-07-26 | 2021-07-26 | Negative pressure type oil gear of steam turbine main engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215633173U (en) |
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2021
- 2021-07-26 CN CN202121712835.1U patent/CN215633173U/en active Active
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