CN210370814U - Bearing box airtight oil shield - Google Patents
Bearing box airtight oil shield Download PDFInfo
- Publication number
- CN210370814U CN210370814U CN201920348820.8U CN201920348820U CN210370814U CN 210370814 U CN210370814 U CN 210370814U CN 201920348820 U CN201920348820 U CN 201920348820U CN 210370814 U CN210370814 U CN 210370814U
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- oil baffle
- oil
- tooth
- air
- rotating shaft
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- Sealing Using Fluids, Sealing Without Contact, And Removal Of Oil (AREA)
- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model provides a bearing box airtight oil catch belongs to equipment technical field for the steam turbine. The utility model comprises an oil baffle body, a hole is arranged in the middle of the oil baffle body, the oil baffle body is sleeved outside the rotating shaft, and a gap is arranged between the oil baffle body and the rotating shaft; the inner circumference of the hole is provided with an annular bent oil baffle tooth, an annular air duct is arranged inside the oil baffle body, dry compressed air enters from an air inlet on the side face of the oil baffle body and reaches the bent oil baffle tooth through the annular air duct, and the air is blown out from an air vent of the bent oil baffle tooth.
Description
Technical Field
The utility model belongs to the equipment field for the steam turbine, concretely relates to airtight oil catch of bearing box.
Background
The steam turbine oil keeps off the round of dress motionless on the bearing frame, and the oil keeps off the body in the middle of porosely, and the interior circumference in hole has annular oil to keep off the tooth, has certain clearance between annular oil fender tooth and the steam turbine pivot, and the oil keeps off and is used for preventing the leakage of lubricating oil and preventing that outside foreign matter or steam etc. from getting into the inside pollution lubricating oil of bearing. The oil catch is installed behind the tip of steam turbine bearing box, there is 0.3-0.9 millimeter clearance between the annular tooth point of oil catch tooth and the steam turbine pivot, if the installation clearance undersize, then lead to pivot and oil catch tooth to bump the mill easily, probably cause oil catch scaling high temperature carbonization, carbide piles up gradually, with rotor area of contact bigger and bigger, it is bigger and bigger to extrude its hardness through pivot friction, thereby lead to the intensity of friction bigger and bigger, the vibration that probably leads to the pivot is bigger and bigger, and the vibration appears repeatedly, duration is of a specified duration, influence unit safe operation. In addition, the clearance between the rotating shaft and the oil blocking teeth can be increased due to the occurrence of collision and abrasion, if the reserved clearance is large in installation, the lubricating oil can be leaked out due to the large clearance, when the bearing box of the steam turbine works, negative pressure exists in the bearing box, and external foreign matters or steam are easily sucked into the bearing box, so that the oil quality is influenced, and the performance of the lubricating oil is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the above-mentioned not enough that exists among the prior art, and provide a bearing box gas seal oil catch that structural design is reasonable, excellent in use effect.
The utility model provides a technical scheme that above-mentioned problem adopted is: a bearing box air-tight seal oil baffle comprises an oil baffle body, wherein the oil baffle body is sleeved outside a rotating shaft, and a gap is formed between the oil baffle body and the rotating shaft; the oil baffle structure is characterized in that an air inlet is formed in the oil baffle body, an air channel is formed in the oil baffle body, oil baffle teeth are arranged on the oil baffle body in the direction towards the rotating shaft, one end of the air channel is communicated with the air inlet, the other end of the air channel is communicated with the oil baffle teeth, and the oil baffle teeth are not in contact with the rotating shaft; the oil catch tooth comprises a plurality of left side tooth bodies and right side tooth bodies, and the left side tooth bodies and the right side tooth bodies are arranged in opposite directions.
Further, in order to reduce air leakage, the oil blocking tooth is arranged in a bent structure, and a relatively stable air sealing area is formed between the left side tooth body and the right side tooth body.
Further, the left tooth body and the right tooth body are sequentially arranged, and each left tooth body and each right tooth body form a group to form an air sealing area. Or the left side tooth body is arranged on one side of the oil baffle body, and the right side tooth body is arranged on the other side of the oil baffle body.
Further, the oil baffle is made of a self-lubricating composite material.
Further, an annular air duct through which air passes is formed in the oil baffle body, and compressed air enters the annular air duct from the air inlet and finally reaches the oil baffle teeth.
The working principle is as follows: the dry compressed air enters from the air inlet on the side face of the oil baffle body, reaches the oil baffle teeth through the annular air duct, is blown out from the air vent of the oil baffle teeth through the left side tooth body and the right side tooth body, and forms an annular high-pressure air area between the oil baffle teeth and the rotating shaft of the steam turbine, so that an air sealing ring is formed between the oil baffle body and the rotating shaft, the leakage of lubricating oil and the entering of external foreign matters or steam and the like into the bearing box are reduced or avoided, and a good sealing effect is achieved.
Compared with the prior art, the utility model, have following advantage and effect: a space with a small air leakage opening is formed between the bent oil blocking teeth and the rotating shaft, and a relatively stable high-pressure air area can be formed after air enters, so that the leakage of lubricating oil and the entrance of external foreign matters or steam and the like are prevented, and the sealing effect is good.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of another arrangement of the oil retaining teeth in the embodiment of the present invention.
In the figure: an oil baffle 1; an air inlet 2; an air duct 3; an oil catch 4; a rotating shaft 5; left tooth bodies 41, 42; right tooth bodies 43, 44.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not intended to limit the present invention.
Examples are given.
Referring to fig. 1 to 2, the bearing housing air-tight oil baffle in the embodiment includes an oil baffle body 1, the oil baffle body 1 is sleeved outside a rotating shaft 5, and a gap is formed between the oil baffle body 1 and the rotating shaft 5; an air inlet 2 is arranged on the oil baffle body 1, an air channel 3 is arranged in the oil baffle body 1, an oil baffle tooth 4 is arranged on the oil baffle body 1 in the direction towards the rotating shaft 5, one end of the air channel 3 is communicated with the air inlet 2, the other end of the air channel 3 is communicated with the oil baffle tooth 4, and the oil baffle tooth 4 is not contacted with the rotating shaft 5; the oil slinger 4 includes a plurality of left- hand tooth bodies 41, 42 and right- hand tooth bodies 43, 44, and the left- hand tooth bodies 41, 42 and the right- hand tooth bodies 43, 44 are arranged to face each other.
In order to reduce air leakage, the oil deflector tooth 4 is provided with a bent structure, and a relatively stable air sealing area is formed between the left side tooth body 42 and the right side tooth body 44.
The left teeth 41, 42 and the right teeth 43, 44 are arranged in sequence, and each of the left teeth 41, 42 and the right teeth 43, 44 is a group, forming an air sealing area as shown in fig. 1. Alternatively, the left- hand teeth 41, 42 are arranged on one side of the oil retainer 1 and the right- hand teeth 43, 44 are arranged on the other side of the oil retainer 1 as shown in fig. 2.
The working principle is as follows: the oil baffle body 1 is internally provided with an annular air duct 3, dry compressed air enters from an air inlet 2 on the side surface of the oil baffle body 1 and reaches the bent oil baffle tooth 4 through the annular air duct 3, the left side tooth body 42 forms an air vent bent rightwards, the right side tooth body 44 forms an air vent bent leftwards, the dry compressed air is blown out from the two air vents respectively, because the right air vent and the left air vent form a space with a smaller air leakage opening, the distribution forms of other oil baffle teeth 4 are the same, so that the air leakage can be reduced, a relatively stable annular high-pressure air area is formed between the oil baffle tooth 4 and the steam turbine rotating shaft 5, and an air sealing ring is formed between the oil baffle tooth 4 and the rotating shaft 5, so that the good effects of preventing oil in the bearing box from leaking and preventing external foreign matters or steam from entering the bearing box are achieved.
The bent oil retaining teeth 4 are made of self-lubricating composite materials, are wear-resistant and are not easy to damage the rotating shaft 5. The gas is dry compressed air, but other stable dry gas which has no influence on oil quality can be selected.
And will be apparent to those skilled in the art from the foregoing description.
In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an example of the structure of the present invention. All the equivalent changes or simple changes made according to the structure, characteristics and principle of the utility model are included in the protection scope of the utility model. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (5)
1. A bearing box air-tight seal oil baffle comprises an oil baffle body (1), wherein the oil baffle body (1) is sleeved outside a rotating shaft (5), and a gap is formed between the oil baffle body (1) and the rotating shaft (5); the oil baffle structure is characterized in that an air inlet (2) is formed in the oil baffle body (1), an air channel (3) is formed in the oil baffle body (1), oil baffle teeth (4) are arranged on the oil baffle body (1) in the direction towards the rotating shaft (5), one end of the air channel (3) is communicated with the air inlet (2), the other end of the air channel (3) is communicated with the oil baffle teeth (4), and the oil baffle teeth (4) are not in contact with the rotating shaft (5); the oil baffle tooth (4) comprises a plurality of left tooth bodies (41, 42) and right tooth bodies (43, 44), and the left tooth bodies (41, 42) and the right tooth bodies (43, 44) are arranged oppositely.
2. The hermetic seal oil baffle for bearing housing as claimed in claim 1, wherein the oil baffle tooth (4) is of a curved structure and forms an air sealing area between the left-hand tooth body (42) and the right-hand tooth body (44).
3. The bearing housing gas-tight seal oil baffle according to claim 1, characterized in that the left-hand tooth bodies (41, 42) and the right-hand tooth bodies (43, 44) are arranged in sequence.
4. Hermetic seal oil dam for bearing housing according to claim 1, characterized in that said left-hand teeth (41, 42) are arranged on one side of the oil dam (1) and said right-hand teeth (43, 44) are arranged on the other side of the oil dam (1).
5. The bearing housing gas-tight oil baffle according to claim 1, characterized in that the material of the oil baffle body (1) is a self-lubricating composite material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920348820.8U CN210370814U (en) | 2019-03-19 | 2019-03-19 | Bearing box airtight oil shield |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920348820.8U CN210370814U (en) | 2019-03-19 | 2019-03-19 | Bearing box airtight oil shield |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210370814U true CN210370814U (en) | 2020-04-21 |
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ID=70245681
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920348820.8U Active CN210370814U (en) | 2019-03-19 | 2019-03-19 | Bearing box airtight oil shield |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210370814U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112160799A (en) * | 2020-09-27 | 2021-01-01 | 铜陵有色金属集团股份有限公司 | Steam blocking structure and device |
-
2019
- 2019-03-19 CN CN201920348820.8U patent/CN210370814U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112160799A (en) * | 2020-09-27 | 2021-01-01 | 铜陵有色金属集团股份有限公司 | Steam blocking structure and device |
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