CN103470320B - Dual-layer air cylinder structure - Google Patents
Dual-layer air cylinder structure Download PDFInfo
- Publication number
- CN103470320B CN103470320B CN201310363854.1A CN201310363854A CN103470320B CN 103470320 B CN103470320 B CN 103470320B CN 201310363854 A CN201310363854 A CN 201310363854A CN 103470320 B CN103470320 B CN 103470320B
- Authority
- CN
- China
- Prior art keywords
- thermal
- wall
- inner cylinder
- protective coating
- air cylinder
- 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.)
- Active
Links
Abstract
The invention discloses a dual-layer air cylinder structure which comprises an inner cylinder and an outer cylinder, wherein a heat-insulating layer is arranged on the periphery of the inner cylinder; the outline and the shape of the heat-insulating layer correspond to and are matched with the outline and the shape of the inner cylinder. According to the dual-layer air cylinder structure disclosed by the invention, on the premise of not influencing various measurement points of the inner cylinder and the assembly and the disassembly of parts such as a split locking bolt, the heat-insulating layer is arranged on the outer wall of the inner cylinder, so that great cooling formed by low-temperature and low-pressure stream of an interlayer between the inner cylinder and the outer cylinder to the outer wall of the inner cylinder is avoided, further the heat loss of the outer wall of the inner cylinder is reduced, the temperature difference and the pressure difference between the inner wall and the outer wall of the inner cylinder are enabled to approach to each other as much as possible, the thermal deformation opening phenomenon of the inner wall and the outer wall of the inner cylinder due to excessively-great temperature difference and pressure difference is effectively prevented, the manufacturing difficulty of the air cylinder is further reduced, the sealing property of the air cylinder is ensured, the work doing efficiency of a steam turbine is increased, the operation cost of the steam turbine is reduced, the stability of the steam turbine is improved, and reliable and safe operation of a steam turbine set is guaranteed.
Description
Technical field
The present invention relates to the cylinder worked in high temperature and high pressure environment for a long time, specifically a kind of dual-layer air cylinder structure.
Background technique
Steam turbine is rotary power machinery equipment steam energy being converted to mechanical work, and the vitals of its conversion steam energy is cylinder, and the action characteristic of cylinder determines it and must work in the environment of High Temperature High Pressure for a long time.In order to adapt to the operating environment requirements of High Temperature High Pressure, the high pressure cylinder of steam turbine is generally double layer construction, namely high pressure cylinder is primarily of inner casing and the outer shell formation covering inner casing, High Temperature High Pressure quality steam in inner casing be used as drive rotor portion rotate acting, be full of in the interlayer between inner casing and outer shell be low temperature, low pressure height row steam.Owing to there is the larger temperature difference and pressure reduction between acting steam and high row's steam, this temperature difference and pressure reduction can cause forming the larger temperature difference and pressure reduction between the inner and outer wall of inner casing, thus easily cause inner casing split place to produce opening deformation from inside to outside because of thermal distortion, this opening deformation not only can make the high-quality acting steam leakage of a large amount of High Temperature High Pressure, affect steam turbine mechanical efficiency, increase steam turbine operation cost, but also the height between inner casing and outer shell in interlayer can be made to arrange vapor (steam) temperature and pressure increase (being doped with the high-quality acting steam of a large amount of High Temperature High Pressure in high row's steam), and then make the inner and outer wall of outer shell form the very large temperature difference and pressure reduction, outer shell split place is caused to produce opening deformation from inside to outside because of thermal distortion, there is the situations such as steam leakage, affect steam turbine mechanical efficiency further, increase steam turbine operation cost, more can directly affects the stability of steam turbine, there is very large potential safety hazard.Still more, the flange thickness at cylinder (comprising inner casing and outer shell) split place is 3 ~ 4 times of cylinder wall thickness, so under acting steam and height arrange the impact of steam, the temperature difference between casing split place flange inner wall and outer wall and pressure reduction can strengthen further, thus casing split place is aggravated further because thermal distortion produces the risk of dehiscing.
Summary of the invention
The object of the invention is to: for above-mentioned the deficiencies in the prior art, a kind of dual-layer air cylinder structure that can effectively prevent the steam of low temperature, low pressure from cooling inner casing outer wall is provided, thus avoid inner casing inner and outer wall because of the temperature difference, pressure reduction is excessive and a series of negative consequences produced.
The technical solution used in the present invention is: a kind of dual-layer air cylinder structure, comprises inner casing and outer shell, and the periphery of described inner casing is provided with thermal-protective coating.
Further, corresponding, the contour shape that is matched with inner casing of the contour shape of described thermal-protective coating.
Further, described thermal-protective coating is spliced and combined by polylith thermal baffle to form.
Further, the outer wall of described inner casing is provided with the bearing of multiple support, fixing thermal-protective coating.
Further, the top of described bearing is provided with tapped hole; Described thermal-protective coating is placed on the top of bearing, and thermal-protective coating is provided with the perforation corresponding with the tapped hole on bearing, and the lock screw be assemblied on bearing passes the perforation on thermal-protective coating, and thermal-protective coating is fixing on bearing.
Further, fix with welding manner between described lock screw and bearing.
Or further, the thermal baffle joints of described thermal-protective coating is superimposed at lock screw place, is fixed on bearing by the thermal baffle be superimposed together by lock screw.Locked spacer is provided with between nut on described lock screw and thermal baffle.
The invention has the beneficial effects as follows: under the prerequisite not affecting the parts handling such as each measuring point of inner casing and split lock bolt, by arranging thermal-protective coating on inner casing outer wall, the low temperature between inner casing and outer shell in interlayer is avoided with this, low pressure steam is formed inner casing outer wall and significantly cools, thus reduce the thermal loss of inner casing outer wall, make the temperature difference between inner casing inner and outer wall, pressure reduction is close as much as possible, effectively prevent inner casing inner and outer wall because of the temperature difference, pressure reduction is excessive and thermal distortion that is that produce is dehisced phenomenon, and then reduce the manufacture difficulty of cylinder, ensure the sealing of cylinder, improve steam turbine mechanical efficiency, reduce steam turbine operation cost, improve the stability of steam turbine, guarantee steam turbine set is reliable, the operation of safety.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further illustrated.
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is a kind of fixed structure schematic diagram of thermal-protective coating on inner casing outer wall in Fig. 1.
Fig. 3 is the another kind of fixed structure schematic diagram of thermal-protective coating on inner casing outer wall in Fig. 1.
Code name implication in figure: 1-inner casing; 2-outer shell; 3-thermal-protective coating; 4-bearing; 5-lock screw; 6-locked spacer.
Embodiment
See Fig. 1, Fig. 2 and Fig. 3: the present invention includes inner casing 1 and outer shell 2, the outer wall of inner casing 1 is provided with welding manner the bearing 4 of multiple support, fixing thermal-protective coating 3, and these bearings 4 are scattering device on inner casing 1 outer wall, and the top of each bearing 4 is provided with tapped hole.The periphery of inner casing 1 is provided with contour shape correspondence, is matched with the thermal-protective coating 3 of the outer wall contour shape of inner casing 1, this thermal-protective coating 3 is spliced and combined by polylith thermal baffle to form, thermal-protective coating 3 is placed on the top of bearing 4, thermal-protective coating 3 is provided with the perforation corresponding with the tapped hole on bearing 4, lock screw 5 is equipped with in the tapped hole of bearing 4, this lock screw 5 is assemblied in the tapped hole of bearing 4 through the perforation on thermal-protective coating 3, is fixed on the carrier 4 by thermal-protective coating 3 with this.In order to prevent because lock screw 5 loosens, thermal-protective coating 3 be come off, fix in spot welding mode between lock screw 5 and bearing 4.
The thermal-protective coating 3 of said structure is the fixing of relative permanency on inner casing 1 outer wall, can not easy removal.But in actual maintenance process, conveniently inner casing 1 is safeguarded, can consider thermal-protective coating 3 to be fixed on removably on inner casing 1 outer wall, concrete fixation is (as shown in Figure 3), the thermal baffle joints of thermal-protective coating 3 is superimposed at bearing 4 place, superimposed thermal baffle arranges the perforation corresponding with the tapped hole on bearing 4 top, lock screw 5 is assemblied in the tapped hole of bearing 4 through superimposed perforation on thermal baffle, nut on lock screw 5 and be provided with locked spacer 6 between thermal baffle, the thermal baffle be superimposed together is fixed on the carrier 4 with this by lock screw 5.
Thermal-protective coating of the present invention, except adopting lock screw and fixing on the bearing of inner casing outer wall, the mode such as spring bolt, tight locking button can also be adopted fixing on the bearing of inner casing outer wall, but the reliability that these means of fixation are fixed is not as lock screw.In addition, the present invention, except being applicable to steam turbine high-pressure cylinder, is also applicable to Steam Turbine Through IP Admission.
Claims (6)
1. a dual-layer air cylinder structure, comprise inner casing (1) and outer shell (2), the periphery of described inner casing (1) is provided with thermal-protective coating (3), and the outer wall of described inner casing (1) is provided with multiple support, the bearing (4) of fixing thermal-protective coating (3), it is characterized in that: the top of described bearing (4) is provided with tapped hole, described thermal-protective coating (3) is placed on the top of bearing (4), thermal-protective coating (3) is provided with the perforation corresponding with the tapped hole on bearing (4), be assemblied in lock screw (5) on bearing (4) through the perforation on thermal-protective coating (3), thermal-protective coating (3) is upper fixing at bearing (4).
2. dual-layer air cylinder structure according to claim 1, is characterized in that: the contour shape of described thermal-protective coating (3) is corresponding, the contour shape that is matched with inner casing (1).
3. dual-layer air cylinder structure according to claim 1 or 2, is characterized in that: described thermal-protective coating (3) is spliced and combined by polylith thermal baffle to form.
4. dual-layer air cylinder structure according to claim 1, is characterized in that: fix with welding manner between described lock screw (5) and bearing (4).
5. dual-layer air cylinder structure according to claim 1, is characterized in that: the thermal baffle joints of described thermal-protective coating (3) is superimposed at lock screw (5) place, is fixed on bearing (4) by the thermal baffle be superimposed together by lock screw (5).
6. dual-layer air cylinder structure according to claim 5, is characterized in that: the nut on described lock screw (5) and be provided with locked spacer (6) between thermal baffle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310363854.1A CN103470320B (en) | 2013-08-20 | 2013-08-20 | Dual-layer air cylinder structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310363854.1A CN103470320B (en) | 2013-08-20 | 2013-08-20 | Dual-layer air cylinder structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103470320A CN103470320A (en) | 2013-12-25 |
| CN103470320B true CN103470320B (en) | 2015-04-22 |
Family
ID=49795337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310363854.1A Active CN103470320B (en) | 2013-08-20 | 2013-08-20 | Dual-layer air cylinder structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103470320B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104481603B (en) * | 2014-11-21 | 2016-04-20 | 东方电气集团东方汽轮机有限公司 | Stream heat-insulating structure in steam turbine low-pressure inner casing steam |
| CN107795343A (en) * | 2017-12-06 | 2018-03-13 | 中国船舶重工集团公司第七0三研究所 | A kind of inner cover shell structure that can reduce heat convection |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB733537A (en) * | 1950-09-14 | 1955-07-13 | Ag Fuer Technische Studien | Improvements in or relating to housings for gas or steam turbines |
| AT381367B (en) * | 1984-06-20 | 1986-10-10 | Jericha Herbert Dipl Ing Dr Te | Internal insulation for high-temperature steam turbines |
| DE19535227A1 (en) * | 1995-09-22 | 1997-03-27 | Asea Brown Boveri | Casing for high pressure steam turbine |
| CN1504638A (en) * | 2002-12-02 | 2004-06-16 | Abb涡轮系统有限公司 | Exhaust-gas-turbine casing |
| CN2813899Y (en) * | 2005-09-13 | 2006-09-06 | 上海汽轮机有限公司 | Steam turbine low-pressure single-layer inner cylinder |
| EP2112334A1 (en) * | 2008-04-21 | 2009-10-28 | Siemens Aktiengesellschaft | Outer housing for a turbo engine |
-
2013
- 2013-08-20 CN CN201310363854.1A patent/CN103470320B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB733537A (en) * | 1950-09-14 | 1955-07-13 | Ag Fuer Technische Studien | Improvements in or relating to housings for gas or steam turbines |
| AT381367B (en) * | 1984-06-20 | 1986-10-10 | Jericha Herbert Dipl Ing Dr Te | Internal insulation for high-temperature steam turbines |
| DE19535227A1 (en) * | 1995-09-22 | 1997-03-27 | Asea Brown Boveri | Casing for high pressure steam turbine |
| CN1504638A (en) * | 2002-12-02 | 2004-06-16 | Abb涡轮系统有限公司 | Exhaust-gas-turbine casing |
| CN2813899Y (en) * | 2005-09-13 | 2006-09-06 | 上海汽轮机有限公司 | Steam turbine low-pressure single-layer inner cylinder |
| EP2112334A1 (en) * | 2008-04-21 | 2009-10-28 | Siemens Aktiengesellschaft | Outer housing for a turbo engine |
Non-Patent Citations (1)
| Title |
|---|
| 双层汽缸内外缸温差异常的分析和防范措施;盛传正，陈江新，彭梅根;《江西电力职业技术学院学报》;20101231;第23卷(第4期);43-46 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103470320A (en) | 2013-12-25 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US20130119671A1 (en) | Screw expansion power generation device | |
| CN206458517U (en) | A kind of nuclear power plant's turbine low pressure cylinder | |
| CN103470320B (en) | Dual-layer air cylinder structure | |
| CN104500157A (en) | Low-pressure cylinder of steam turbine | |
| CN105626838A (en) | Axis height adjustable gear box supporting structure | |
| US20130236334A1 (en) | Double-screw liquid pump | |
| CN103046974A (en) | High-pressure cylinder of ultra-supercritical steam turbine set | |
| CN204783137U (en) | High middling pressure integral type inner casing structure of steam turbine | |
| BRPI1106941A2 (en) | between the multiplier input shaft and the rotor turning shaft | |
| CN210799056U (en) | Ultra-high temperature and ultra-high pressure back pressure steam turbine | |
| CN202866911U (en) | Turbine high-pressure cylinder structure | |
| CN202348355U (en) | High height-width ratio horizontal joint flange for upper and lower half cylinder bodies of steam turbine | |
| CN204942210U (en) | A kind of turbine body outer shell bolt combination | |
| CN204652093U (en) | A kind of turbo generator unsplit frame | |
| CN202900332U (en) | Turbine air cylinder casting assembly | |
| CN207229468U (en) | A kind of horizontal vortex pump with cooling pre-washing function | |
| CN202885624U (en) | Cooling tube jacket | |
| CN203522437U (en) | Improved turbine generator | |
| CN203272024U (en) | Evaporated cooling wind power generating unit | |
| US9057287B2 (en) | Butterfly plate for a steam turbine exhaust hood | |
| CN206860302U (en) | A kind of single cylinder horizontal diesel engine wet cylinder liner | |
| CN204700245U (en) | A kind of device fixing sand mold for thermal power generation cylinder disjunctor arbor | |
| CN205026256U (en) | Special rotary joint of solar energy power generation equipment | |
| CN206368721U (en) | A kind of semiclosed screw power machine for low-temperature electricity-generating | |
| CN106917648B (en) | The cylinder heat insulation structural of steam turbine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant |