CN112554970A - Push-pull structure of bearing box of steam turbine - Google Patents
Push-pull structure of bearing box of steam turbine Download PDFInfo
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- CN112554970A CN112554970A CN202011568782.0A CN202011568782A CN112554970A CN 112554970 A CN112554970 A CN 112554970A CN 202011568782 A CN202011568782 A CN 202011568782A CN 112554970 A CN112554970 A CN 112554970A
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- China
- Prior art keywords
- key
- push
- bearing box
- gasket
- steam turbine
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Classifications
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- 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
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- 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
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- 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
- F01D25/28—Supporting or mounting arrangements, e.g. for turbine casing
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
The invention relates to a push-pull structure of a bearing box of a steam turbine, which relates to a push-pull structure and aims to solve the problem of unsmooth unit expansion of the steam turbine applying a cat-claw push-pull sliding pin system. Because the push-pull structure is in non-rigid connection, the interference force on the cylinder can be obviously reduced, and the unstable factors of the cylinder are reduced.
Description
Technical Field
The invention relates to a push-pull structure, in particular to a push-pull structure of a bearing box of a steam turbine, and belongs to the technical field of steam turbines.
Background
The sliding pin system of the existing steam turbine adopts a cat-claw push-pull structure, belongs to high-position push-pull, and has overturning moment, so that if the force and moment of a steam extraction pipeline of a steam turbine body on a cylinder exceed design values, a cat-claw support of a bearing box is easy to deform, and unsmooth expansion of a unit is caused.
Disclosure of Invention
The invention provides a push-pull structure of a bearing box of a steam turbine, aiming at solving the problem of unsmooth unit expansion of the steam turbine applying a cat-claw push-pull sliding pin system.
The technical scheme adopted by the invention for solving the problems is as follows:
the push-pull structure of the steam turbine bearing box comprises a steam turbine cylinder and a bearing box, wherein a key groove is formed in a guide device of the steam turbine cylinder, a guide key is arranged on the bearing box, the guide key is inserted into the key groove, the push-pull structure of the steam turbine bearing box further comprises a long tension key, a short tension key and a first gasket, the long tension key and the short tension key are arranged on the upper portion of the guide key from left to right, the lower surface of the short tension key is fixedly connected with the upper surface of the guide key, the lower surfaces of two ends of the long tension key are fixedly connected with a guide device of the steam turbine cylinder, and the first gasket is located between the.
Furthermore, the push-pull structure of the bearing box of the steam turbine further comprises a second gasket and a third gasket, the second gasket is inserted in the transverse matching gap between the guide key and the key groove and is positioned on one side of the short tension key, and the third gasket is inserted in the transverse matching gap between the guide key of the bearing box and the key groove of the cylinder and is positioned on the other side of the short tension key.
Further, the push-pull structure of the turbine bearing box further comprises a fourth gasket, and the fourth gasket is inserted between the guide key and the key groove.
Further, the length of the long tension key is larger than the width of the key groove of the cylinder.
Further, the length of the short tension key is smaller than the width of the guide key of the bearing box.
Further, the length of the first gasket is the same as that of the short tension key.
The invention has the beneficial effects that:
the fourth gasket is used for transmitting the thrust of the axial expansion of the unit; the long tension key and the short tension key are used for transmitting the contraction tension of the unit, and the first gasket is used for adjusting the gap between the long tension key and the short tension key; the second gasket and the third gasket are transverse gaskets for guiding the unit; because the push-pull structure is in non-rigid connection, the interference force on the cylinder can be obviously reduced, and the unstable factors of the cylinder are reduced.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a cross-sectional view B-B of FIG. 1;
FIG. 4 is a schematic view of a keyway in a cylinder;
fig. 5 is a schematic structural view of a guide key in a bearing housing.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 2, the push-pull structure of the bearing box of the steam turbine in the embodiment comprises a steam turbine cylinder 7 and a bearing box 8, a keyway 7-1-1 is arranged on a guide device 7-1 of the cylinder 7, a guide key 8-1 is arranged on the bearing box 8, the guide key 8-1 is inserted into the keyway 7-1-1, the push-pull structure of the bearing box of the steam turbine further comprises a long tension key 1, a short tension key 2 and a first gasket 3,
the long tension key 1 and the short tension key 2 are arranged on the upper portion of the guide key 8-1 from left to right, the lower surface of the short tension key 2 is fixedly connected with the upper surface of the guide key 8-1, the lower surfaces of two ends of the long tension key 1 are fixedly connected with the guide device 7-1, and the first gasket 3 is located between the long tension key 1 and the short tension key 2.
The gap between the long tension key 1 and the short tension key 2 is adjusted through the first gasket 3. Through actually matching the gasket 3 between the two tension keys, the gap between the two keys is adjusted, so that when the tension of the cat-paw reaches a certain value during the contraction of the cylinder, the tension key starts to bear the force, and part of the contraction force of the cylinder directly acts on the bottom plate of the bearing box, thereby reducing the overturning moment of the bearing box and the stress of the cat-paw.
The second embodiment is as follows: the embodiment is described with reference to fig. 1 and 3, the push-pull structure of the turbine bearing box according to the embodiment further includes a second gasket 5 and a third gasket 6, the second gasket 5 is inserted into the transverse matching gap between the guide key 8-1 and the key groove 7-1-1 and is located on one side of the short tension key 2, and the third gasket 6 is inserted into the transverse matching gap between the guide key 8-1 of the bearing box 8 and the key groove 7-1-1 of the cylinder 7 and is located on the other side of the short tension key 2.
A gasket 5 and a gasket 6 are respectively inserted into a transverse matching gap between a bearing box guide key and a cylinder key groove 7-1-1, and the gap is registered, so that the unit is prevented from skewing during expansion and contraction, and the thrust and the pull are always on the axis of the unit.
Other components and connections are the same as those in the first embodiment.
The third concrete implementation mode: the embodiment is described with reference to fig. 1 and 2, and the push-pull structure of the turbine bearing box according to the embodiment further includes a fourth gasket 4, and the fourth gasket 4 is inserted between the guide key 8-1 and the key groove 7-1-1. The gap between the guide key of the bearing box and the key groove of the cylinder is adjusted through the thickness of the fourth gasket 4, so that the thrust key starts to act after the cat's claw is stressed to a certain degree, and the expansion force of the cylinder directly acts on the bottom plate of the bearing box, thereby reducing the overturning moment of the bearing box generated by high-position push-pull of the cat's claw and ensuring the elevation of the bearing;
other components are connected in the same manner as in the second embodiment.
The fourth concrete implementation mode: the present embodiment will be described with reference to fig. 1, and the length of the long tension key 1 of the present embodiment is greater than the width of the key groove 7-1 of the cylinder 7.
Other components and connection relationships are the same as those in the first, second or third embodiment.
The fifth concrete implementation mode: the present embodiment is described with reference to fig. 1, and the length of the short tension key 2 of the present embodiment is smaller than the width of the guide key 8-1 of the bearing housing 8.
The sixth specific implementation mode: the present embodiment will be described with reference to fig. 1, and the length of the first spacer 3 is the same as the length of the short tension key 2 in the present embodiment.
The working principle is as follows:
the invention comprises two parts, one part is used when the unit expands, a gasket 4 is inserted between a guide key 8-1 of a bearing box 8 and a key groove 7-1-1 of a cylinder 7, the gap between the guide key of the bearing box and the key groove of the cylinder is adjusted through the thickness of the gasket 4, the thrust key starts to act after the cat's claw is stressed to a certain degree, the expansion force of the cylinder directly acts on the bottom plate of the bearing box, thereby reducing the overturning moment of the bearing box generated by high-position push-pull of the cat's claw and ensuring the elevation of the bearing;
the other part is used when the steam turbine is shut down and contracted, the structure is that a pair of tension keys (a long tension key 1 and a short tension key 2) is arranged on a bearing box guide key 8-1 and a cylinder key groove 7-1-1, and a gap between the two keys is adjusted by actually matching a gasket 3 between the two tension keys, so that when the cylinder is contracted, when the tension of the cat claw reaches a certain level, the tension key starts to bear force, and thus, one part of the contraction force of the cylinder directly acts on a bearing box bottom plate, and the overturning moment of the bearing box and the stress of the cat claw are further reduced. Meanwhile, a gasket 5 and a gasket 6 are respectively inserted into a transverse matching gap between a bearing box guide key and a cylinder key groove 7-1-1, and the gap is registered, so that the unit is prevented from skewing during expansion and contraction, and the thrust and the pull are always on the axis of the unit.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a steam turbine bearing box push-and-pull structure, it includes steam turbine cylinder (7) and bearing box (8), is equipped with keyway (7-1-1) on guider (7-1) of cylinder (7), and bearing box (8) are equipped with guide key (8-1), and guide key (8-1) cartridge is in keyway (7-1-1), its characterized in that: the push-pull structure of the turbine bearing box further comprises a long tension key (1), a short tension key (2) and a first gasket (3), wherein the long tension key (1) and the short tension key (2) are arranged on the upper portion of the guide key (8-1) from left to right, the lower surface of the short tension key (2) is fixedly connected with the upper surface of the guide key (8-1), the lower surfaces of two ends of the long tension key (1) are fixedly connected with a guide device (7-1), and the first gasket (3) is located between the long tension key (1) and the short tension key (2).
2. The push-pull structure for a bearing housing of a steam turbine according to claim 1, wherein: the push-pull structure of the turbine bearing box further comprises a second gasket (5) and a third gasket (6), the second gasket (5) is inserted in a transverse matching gap between the guide key (8-1) and the key groove (7-1-1) and is positioned on one side of the short tension key (2), and the third gasket (6) is inserted in a transverse matching gap between the guide key (8-1) of the bearing box (8) and the key groove (7-1-1) of the cylinder (7) and is positioned on the other side of the short tension key (2).
3. The push-pull structure for a bearing housing of a steam turbine according to claim 1, wherein: the push-pull structure of the turbine bearing box further comprises a fourth gasket (4), and the fourth gasket (4) is inserted between the guide key (8-1) and the key groove (7-1-1).
4. The push-pull structure for a bearing housing of a steam turbine according to claim 1, wherein: the length of the long tension key (1) is larger than the width of a key groove (7-1-1) of the cylinder (7).
5. The push-pull structure for a bearing housing of a steam turbine according to claim 1, wherein: the length of the short tension key (2) is smaller than the width of a guide key (8-1) of the bearing box (8).
6. The push-pull structure for a bearing housing of a steam turbine according to claim 1, wherein: the length of the first gasket (3) is the same as that of the short tension key (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011568782.0A CN112554970A (en) | 2020-12-25 | 2020-12-25 | Push-pull structure of bearing box of steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011568782.0A CN112554970A (en) | 2020-12-25 | 2020-12-25 | Push-pull structure of bearing box of steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112554970A true CN112554970A (en) | 2021-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011568782.0A Pending CN112554970A (en) | 2020-12-25 | 2020-12-25 | Push-pull structure of bearing box of steam turbine |
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| Country | Link |
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| CN (1) | CN112554970A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412593A (en) * | 2021-12-20 | 2022-04-29 | 东方电气集团东方汽轮机有限公司 | Wear-resistant and oxidation-resistant guide key structure, sliding pin system and assembling method |
| CN114542206A (en) * | 2022-03-09 | 2022-05-27 | 中国船舶重工集团公司第七0三研究所 | Bearing box of compact structure type unit |
-
2020
- 2020-12-25 CN CN202011568782.0A patent/CN112554970A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114412593A (en) * | 2021-12-20 | 2022-04-29 | 东方电气集团东方汽轮机有限公司 | Wear-resistant and oxidation-resistant guide key structure, sliding pin system and assembling method |
| CN114412593B (en) * | 2021-12-20 | 2023-07-18 | 东方电气集团东方汽轮机有限公司 | Wear-resistant and oxidation-resistant guide key structure, sliding pin system and assembly method |
| CN114542206A (en) * | 2022-03-09 | 2022-05-27 | 中国船舶重工集团公司第七0三研究所 | Bearing box of compact structure type unit |
| CN114542206B (en) * | 2022-03-09 | 2024-02-20 | 中国船舶重工集团公司第七0三研究所 | Bearing box of compact structure unit |
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