CN112554970B - Push-pull structure of turbine bearing box - Google Patents
Push-pull structure of turbine bearing box Download PDFInfo
- Publication number
- CN112554970B CN112554970B CN202011568782.0A CN202011568782A CN112554970B CN 112554970 B CN112554970 B CN 112554970B CN 202011568782 A CN202011568782 A CN 202011568782A CN 112554970 B CN112554970 B CN 112554970B
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- Prior art keywords
- key
- gasket
- bearing box
- push
- cylinder
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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
-
- 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)
- Support Of The Bearing (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 aims to solve the problem of unsmooth expansion of a unit of the existing steam turbine using a sliding pin system of a cat claw push-pull. Because the push-pull structure is in non-rigid connection, the interference force to 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, if the force and moment of a steam turbine body steam extraction pipeline to a cylinder exceed design values, a bearing box cat claw support is easy to deform, and the expansion of a unit is unsmooth.
Disclosure of Invention
The invention aims to solve the problem of unsmooth expansion of a unit of a turbine by using a sliding pin system of a cat claw push-pull, and further provides a turbine bearing box push-pull structure.
The technical scheme adopted by the invention for solving the problems is as follows:
the steam turbine bearing box push-pull structure comprises a steam turbine cylinder and a bearing box, wherein a key groove is formed in a guide device of the cylinder, the bearing box is provided with a guide key, the guide key is inserted into the key groove, the steam turbine bearing box push-pull structure 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 at the upper part 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 the guide device of the cylinder, and the first gasket is positioned between the long tension key and the short tension key.
Further, the turbine bearing box push-pull structure further comprises a second gasket and a third gasket, wherein 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 turbine bearing box push-pull structure 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 greater than the width of the keyway of the cylinder.
Further, the length of the short tension key is smaller than the width of the guide key of the bearing housing.
Further, the length of the first spacer is the same as the length of the short tension key.
The beneficial effects of the invention are as follows:
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 shrinkage 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 to 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 sectional view B-B of FIG. 1;
FIG. 4 is a schematic illustration of the configuration of a keyway in a cylinder;
Fig. 5 is a schematic view of the structure of the guide key in the bearing housing.
Detailed Description
The first embodiment is as follows: referring to fig. 1 to 2, a turbine bearing housing push-pull structure according to the present embodiment includes a turbine cylinder 7 and a bearing housing 8, a key groove 7-1-1 is provided on a guide 7-1 of the cylinder 7, a guide key 8-1 is provided on the bearing housing 8, the guide key 8-1 is inserted into the key groove 7-1-1, the turbine bearing housing push-pull structure further includes a long tension key 1, a short tension key 2 and a first spacer 3,
The long tension key 1 and the short tension key 2 are arranged at the upper part 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 the two ends of the long tension key 1 are fixedly connected with the guide device 7-1, and the first gasket 3 is positioned 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 the gasket 3 between two tension keys of real configuration, adjust the clearance between two keys, guarantee when the cylinder shrink when cat claw pulling force reaches certain, this tension key begins the atress, and the shrink power of cylinder is partly will directly be acted on the bearing box bottom plate like this, and then reduces bearing box upset moment and cat claw atress.
The second embodiment is as follows: referring to fig. 1 and 3, the push-pull structure of a turbine bearing housing according to the present embodiment further includes a second spacer 5 and a third spacer 6, wherein the second spacer 5 is inserted in a space between the guide key 8-1 and the key slot 7-1-1 and is located at one side of the short tension key 2, and the third spacer 6 is inserted in a space between the guide key 8-1 of the bearing housing 8 and the key slot 7-1-1 of the cylinder 7 and is located at the other side of the short tension key 2.
The gasket 5 and the gasket 6 are respectively inserted into the transverse matching gaps of the bearing box guide key and the cylinder key groove 7-1-1, and the gaps are registered, so that the unit is ensured not to be skewed when expanding and contracting, and the pushing force and the pulling force are always on the axis of the unit.
Other components and connection relationships are the same as those of the first embodiment.
And a third specific embodiment: the present embodiment is described with reference to fig. 1 and 2, and the push-pull structure of a turbine bearing housing according to the present embodiment further includes a fourth gasket 4, where 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 slot of the cylinder is adjusted through the thickness of the fourth gasket 4, so that the thrust key can start to act after the cat claw is stressed to a certain degree, and the expansion force of the cylinder can directly act on the bottom plate of the bearing box, thereby reducing the overturning moment of the bearing box caused by high-position push-pull of the cat claw and ensuring the elevation of the bearing;
Other components are the same as those in the second embodiment in connection.
The specific embodiment IV is as follows: the length of the long tension key 1 according to the present embodiment is longer than the width of the key groove 7-1 of the cylinder 7, as described with reference to fig. 1.
Other compositions and connection relationships are the same as those of the first, second or third embodiments.
Fifth embodiment: in the present embodiment, the length of the short tension key 2 is smaller than the width of the guide key 8-1 of the bearing housing 8, as described in the present embodiment, with reference to fig. 1.
Specific embodiment six: the present embodiment will be described with reference to fig. 1, in which the length of the first spacer 3 is the same as the length of the short tension key 2.
Working principle:
The invention comprises two parts, wherein 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 is ensured to start to act after the cat claw is stressed to a certain degree, and the expansion force of the cylinder is directly acted on the bottom plate of the bearing box, so that the overturning moment of the bearing box generated by high-position push-pull of the cat claw is reduced, and the bearing elevation is ensured;
The other part is used when the steam turbine is stopped and contracted, a pair of tension keys (a long tension key 1 and a short tension key 2) are arranged on a bearing box guide key 8-1 and a cylinder key groove 7-1-1, a gap between the two tension keys is adjusted by a gasket 3 between the two tension keys, when the cat claw tension reaches a certain level during cylinder contraction, the tension keys start to bear force, and thus a part of the contraction force of the cylinder directly acts on a bearing box bottom plate, and further the overturning moment of the bearing box and the stress of the cat claw are reduced. Meanwhile, the gaskets 5 and 6 are respectively inserted into the transverse matching gaps of the bearing box guide key and the cylinder key groove 7-1-1, and the gaps are registered, so that the unit is ensured not to be skewed when expanding and contracting, and the pushing force and the pulling force are always on the axis of the unit.
The present invention is not limited to the preferred embodiments, but is capable of modification and variation in detail, and other embodiments, such as those described above, of making various modifications and equivalents will fall within the spirit and scope of the present invention.
Claims (4)
1. The utility model provides a turbine bearing box push-and-pull structure, it includes 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 steam turbine bearing box push-pull structure further comprises a long tension key (1), a short tension key (2), a first gasket (3) and a fourth gasket (4), wherein the long tension key (1) and the short tension key (2) are arranged on the upper portion of the guide key (8-1), the short tension key (2) is close to the steam turbine cylinder (7), the long tension key (1) is relatively arranged away from the steam turbine cylinder (7), 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 the two ends of the long tension key (1) are fixedly connected with the guide device (7-1), the first gasket (3) is located between the long tension key (1) and the short tension key (2), the fourth gasket (4) is inserted between the guide key (8-1) and the key groove (7-1-1), and the length of the long tension key (1) is larger than the width of the key groove (7-1-1) of the cylinder (7).
2. The turbine bearing housing push-pull structure of claim 1 wherein: the turbine bearing box push-pull structure further comprises a second gasket (5) and a third gasket (6), wherein 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 turbine bearing housing push-pull structure of claim 1 wherein: the length of the short tension key (2) is smaller than the width of the guide key (8-1) of the bearing box (8).
4. The turbine bearing housing push-pull structure of claim 1 wherein: the length of the first gasket (3) is the same as the length of the short tension key (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011568782.0A CN112554970B (en) | 2020-12-25 | 2020-12-25 | Push-pull structure of turbine bearing box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011568782.0A CN112554970B (en) | 2020-12-25 | 2020-12-25 | Push-pull structure of turbine bearing box |
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| Publication Number | Publication Date |
|---|---|
| CN112554970A CN112554970A (en) | 2021-03-26 |
| CN112554970B true CN112554970B (en) | 2024-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011568782.0A Active CN112554970B (en) | 2020-12-25 | 2020-12-25 | Push-pull structure of turbine bearing box |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN114922702B (en) * | 2022-05-25 | 2025-03-04 | 哈尔滨汽轮机厂有限责任公司 | A connection structure between a cylinder body and a bearing box in a steam turbine and an installation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213775463U (en) * | 2020-12-25 | 2021-07-23 | 国家电投集团河南电力有限公司 | Push-pull structure of bearing box of steam turbine |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2596019Y (en) * | 2003-01-16 | 2003-12-31 | 任德琛 | Inlaid push-and-pull key type self-lubrication steam turbine bearing box |
| KR101858131B1 (en) * | 2016-11-17 | 2018-05-15 | 두산중공업 주식회사 | Bearing housing structure for easy maintenance without disassembling struts |
| CN110005482B (en) * | 2019-04-03 | 2024-04-26 | 杭州汽轮动力集团股份有限公司 | Novel cylinder and bearing frame adjustment guide structure |
| CN210118170U (en) * | 2019-07-23 | 2020-02-28 | 哈尔滨汽轮机厂有限责任公司 | Sliding pin system for small and medium-sized steam turbines |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN213775463U (en) * | 2020-12-25 | 2021-07-23 | 国家电投集团河南电力有限公司 | Push-pull structure of bearing box of steam turbine |
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| CN112554970A (en) | 2021-03-26 |
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