CN2888080Y - Low pressure end vapor seal with expansion joint for air-cooled steam turbine - Google Patents
Low pressure end vapor seal with expansion joint for air-cooled steam turbine Download PDFInfo
- Publication number
- CN2888080Y CN2888080Y CN 200620039166 CN200620039166U CN2888080Y CN 2888080 Y CN2888080 Y CN 2888080Y CN 200620039166 CN200620039166 CN 200620039166 CN 200620039166 U CN200620039166 U CN 200620039166U CN 2888080 Y CN2888080 Y CN 2888080Y
- Authority
- CN
- China
- Prior art keywords
- expansion joint
- packing
- low
- gland seal
- outer casing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Turbine Rotor Nozzle Sealing (AREA)
Abstract
The utility model relays to low-pressure side gland seal for air cooling steam turbines, in particular to an expansion joint-based gland seal for the low-pressure side of air cooling steam turbines, which is characterized in that the lower part of the low-pressure side gland seal is fixed on the bearing block and the other end of the gland seal is connected with the low-pressure external cylinder through the expansion joint, wherein one end of the expansion joint is connected with the low-pressure external cylinder and the other end is connected with the gland seal. The bearing block sits on the ground and the gland seal is positioned beneath the guide cone of the low-pressure external cylinder. The utility model allows a proper clearance to be maintained between the gland seal and rotor even in the event the low-pressure external cylinder of the turbo set is distorted, as well as ensures vacuum-level air tightness of the low-pressure cylinder, thereby ensuring operational safety.
Description
(1) technical field
The utility model relates to air cooling turbine low voltage terminal packing.
(2) background technique
The cooling medium of air cooling turbine steam discharge is an air, and the exhaust steam heat of Air-cooled Unit is passed to atmosphere in the non-contact mode by metallic walls, thereby back pressure and atmospheric temperature are closely related, so the back pressure excursion is big, change frequently,, and become with temperature difference per day not only with becoming season.Because Air-cooled Unit delivery temperature height and vary within wide limits, the supporting means of low pressure bearing also is the pattern of bearing support, just directly influences the operational reliability of unit.The low-pressure shaft bearing has two kinds of layout patterns: a kind of is a cylinder formula, be that low pressure (LP) cylinder bearing support and lp outer casing fuse, bearing supporting role line is not by the basis, be in cantilever position, along with the variation of exhaust temperature, the variation of vacuum, the bearing absolute altitude will be in the frequent variation, cause bearing load to be redistributed.This structure be used for Air-cooled Unit then still need solve to reduce the bearing absolute altitude to the response change of vacuum, exhaust temperature and with the problems such as flexibly jointed chain of generator.Another kind is that bearing support lands pattern, this pattern is that the low-pressure shaft bearing is separated fully with low pressure (LP) cylinder, the bearing line of support drops on the basis, thereby exhaust back pressure, the caused low pressure (LP) cylinder distortion of variation of temperature, just irrelevant with the bearing support height, guaranteed the safety reliability of Air-cooled Unit, Air-cooled Unit adopts this structure mostly.But routinely the low voltage terminal packing is directly fixed on the lp outer casing end, referring to Fig. 1,, will cause the gap between rotor and the packing to change because bearing support in service is different with the distortion of low pressure (LP) cylinder (also being packing), may bump mill, influence the operation of unit.
(3) summary of the invention
The purpose of this utility model is to provide a kind of air cooling turbine low voltage terminal packing that has expansion joint, this low voltage terminal packing can make and keep suitable dynamic and static gaps between end packing and the rotor, be not out of shape and acute variation with the Air-cooled Unit low pressure (LP) cylinder, also guarantee simultaneously the vacuum tightness of low pressure (LP) cylinder, thereby guaranteed unit safety operation.
The utility model is achieved in that a kind of air cooling turbine low voltage terminal packing that has expansion joint, it is characterized in that the lower branch of low voltage terminal packing is fixed on the bearing support, the end packing the other end connects lp outer casing through expansion joint, expansion joint one end is connected with lp outer casing, the expansion joint the other end is connected with the end packing, the bearing support seat is on ground, and the end packing is positioned at lp outer casing steam discharge flow deflecting cone below.
The above-mentioned air cooling turbine low voltage terminal packing that has expansion joint, described end packing are connected, hold that packing is connected with expansion joint with bearing support, expansion joint is connected with lp outer casing and all adopts hexagon head bolt to be connected and fixed.
The above-mentioned air cooling turbine low voltage terminal packing that has expansion joint, Stamping Steel Ribbon is equipped with in the joint of described expansion joint and lp outer casing, expansion joint and end packing.
The utility model is that the low voltage terminal packing is fixed on the bearing support, is connected to keep sealing and compensate the distortion difference between the two with corrugated-type expansion joint between the end packing the other end and the low pressure (LP) cylinder, thereby reduce the influence of cylinder deformation to external gland, and after adopting the floor model bearing support, axle is that stability strengthens to some extent, so both guarantee the vacuum tightness of low pressure (LP) cylinder, and guaranteed again to hold to keep suitable dynamic and static gaps between packing and the rotor, guaranteed the steam turbine set safe operation.
(4) description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is conventional air cooling turbine low voltage terminal gland seal structure schematic representation
Fig. 2 has the low voltage terminal gland seal structure schematic representation of expansion joint for the utility model;
Fig. 3 is the low voltage terminal packing side schematic view that has expansion joint.
Among the figure: 1 lp outer casing steam discharge flow deflecting cone, 2 outer shells, 3 corrugated-type expansion joints, 4 low voltage terminal packings, 5 bearing supports, 6 bearings, 7 low pressure rotors, 8 Stamping Steel Ribbons, 9,10 bolts.
(5) embodiment
Referring to Fig. 2, Fig. 3, a kind of air cooling turbine low voltage terminal packing that has expansion joint is that the lower branch with low voltage terminal packing 4 is fixed on the bearing support 5, and 5 of bearing supports are on ground, and making axle is that stability strengthens to some extent; Low voltage terminal packing 4 the other ends connect lp outer casing 2 through corrugated-type expansion joint 3.Corrugated-type expansion joint 3 one ends are connected with lp outer casing 2, and corrugated-type expansion joint 3 the other ends are connected with end packing 4, with the distortion difference between compensation lp outer casing 2 and the low voltage terminal packing 4, i.e. distortion difference between lp outer casing 2 and the bearing support 5.End packing 4 is positioned at lp outer casing steam discharge flow deflecting cone 1 below.
The hexagon head bolt 9 of low voltage terminal packing 4 by lower branch be fixed in bearing support 5 second, end packing 4 is fixing by the hexagon head bolt 10 of whole circle with corrugated-type expansion joint 3, corrugated-type expansion joint 3 is fixed by the socket head screw of whole circle with lp outer casing 2.
Because corrugated-type expansion joint 3 is whole coil structures, corrugated-type expansion joint 3 is tightly connected by the Stamping Steel Ribbon of being made by nitrile rubber 8 with the junction of lp outer casing 2, end packing 4, has guaranteed the vacuum tightness of low pressure (LP) cylinder 2.
Because the Air-cooled Unit back pressure changes frequently, and low pressure (LP) cylinder 2 amount of deformation are bigger, and bearing support 5 lands rear stability and strengthens during unit operation, and amount of deformation is less.Because expansion joint 3 itself has flexibility, distortion difference between the two just can absorb by expansion joint 3, thereby guarantees to keep suitable dynamic and static gaps between end packing 4 and the rotor 7, and the vacuum tightness of low pressure (LP) cylinder 2, and then guarantees the safe operation of unit.
Claims (3)
1. air cooling turbine low voltage terminal packing that has expansion joint, it is characterized in that the lower branch of low voltage terminal packing is fixed on the bearing support, the end packing the other end connects lp outer casing through expansion joint, expansion joint one end is connected with lp outer casing, the expansion joint the other end is connected with the end packing, the bearing support seat is on ground, and the end packing is positioned at lp outer casing steam discharge flow deflecting cone below.
2. the air cooling turbine low voltage terminal packing that has expansion joint according to claim 1 is characterized in that holding that packing is connected, holds that packing is connected with expansion joint with bearing support, expansion joint is connected with lp outer casing and all adopts hexagon head bolt to be connected and fixed.
3. the air cooling turbine low voltage terminal packing that has expansion joint according to claim 1 is characterized in that Stamping Steel Ribbon is equipped with in the joint of expansion joint and lp outer casing, expansion joint and end packing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620039166 CN2888080Y (en) | 2006-01-24 | 2006-01-24 | Low pressure end vapor seal with expansion joint for air-cooled steam turbine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620039166 CN2888080Y (en) | 2006-01-24 | 2006-01-24 | Low pressure end vapor seal with expansion joint for air-cooled steam turbine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2888080Y true CN2888080Y (en) | 2007-04-11 |
Family
ID=38046654
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620039166 Expired - Lifetime CN2888080Y (en) | 2006-01-24 | 2006-01-24 | Low pressure end vapor seal with expansion joint for air-cooled steam turbine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2888080Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026185A (en) * | 2018-09-25 | 2018-12-18 | 中国船舶重工集团公司第七0三研究所 | A kind of low parameter back pressure turbine Quick Release ready-package end gland seal structure |
| CN113279828A (en) * | 2021-06-24 | 2021-08-20 | 武汉大学 | Low-pressure steam exhaust structure of nuclear turbine with shaft seal supporting and adjusting device |
-
2006
- 2006-01-24 CN CN 200620039166 patent/CN2888080Y/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109026185A (en) * | 2018-09-25 | 2018-12-18 | 中国船舶重工集团公司第七0三研究所 | A kind of low parameter back pressure turbine Quick Release ready-package end gland seal structure |
| CN109026185B (en) * | 2018-09-25 | 2023-11-28 | 中国船舶重工集团公司第七0三研究所 | Quick-dismantling and quick-assembling type end steam seal structure of low-parameter back pressure steam turbine |
| CN113279828A (en) * | 2021-06-24 | 2021-08-20 | 武汉大学 | Low-pressure steam exhaust structure of nuclear turbine with shaft seal supporting and adjusting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: SHANGHAI ELECTRIC POWER STATION EQUIPMENT CO. Free format text: FORMER OWNER: SHANGHAI TURBINE CO., LTD. Effective date: 20080509 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20080509 Address after: No. 188, Chun Chun Road, Shanghai, Minhang: 200240 Patentee after: Shanghai Electric Station Equipment Co., Ltd. Address before: No. 333, Jiangchuan Road, Shanghai, Minhang District: 200240 Patentee before: Shanghai Steam Turbine Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20070411 |
|
| EXPY | Termination of patent right or utility model |