CN109931112A - A kind of free blade construction of steam turbine and its assembly method - Google Patents
A kind of free blade construction of steam turbine and its assembly method Download PDFInfo
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- CN109931112A CN109931112A CN201910349885.9A CN201910349885A CN109931112A CN 109931112 A CN109931112 A CN 109931112A CN 201910349885 A CN201910349885 A CN 201910349885A CN 109931112 A CN109931112 A CN 109931112A
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- blade
- inserted sheet
- race
- blade root
- circumferential
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Abstract
The present invention is a kind of free blade construction of steam turbine and its assembly method, including blade and wheel hub, the blade is inverted T shaped or double inverted T-shaped blade, the wheel hub is equipped with the race of inverted trapezoidal, the blade includes blade, blade root, the blade is set in race, and blade root is fitted close in race, inserted sheet is inserted between the adjacent blade root, half inserted sheet, last inserted sheet, race top side wall is equipped with cylindrical hole, junction of the edges of two sheets of paper bolt is equipped between the end inserted sheet and blade root, cooperate distinctive assembly method by the design of inverted T shaped or double-T shaped free blade, it is easily accomplished the assembly of blade, inserted sheet in structure is designed to compensate for the deficiency of blade root circumferential thickness, the installation of more convenient blade, it avoids in installation process to wheel hub, the destruction of rotor, the intensity in structure is also improved simultaneously.
Description
Technical field
The present invention relates to turbine blade fields, and in particular to a kind of free blade construction of steam turbine and its assembly method.
Background technique
It is generally used when assembly steam turbine is inverted T shaped or double inverted T-shaped free blade and mills out one in the radial direction in race
Common blade is sequentially loaded by slot, and blade inserting groove hole position finally is sealed at end, solid with radial bolts or axial pin
Fixed end sealing blade is on race.Comparatively laborious when program assembly sealing blade, adjustment blade circumferential direction overall thickness is also with respect to taking
When it is laborious, and because fixed end sealing blade needs punching or tapping on rotor, be unfavorable for next blade exchanging.
Summary of the invention
The purpose of the present invention is to solve the deficiencies of above-mentioned technology, and the inverted T shaped free blade of one kind and its dress designed
Method of completing the square, this method increase the flexibilities adjusted when turbine blade installation, reduce installation workload, avoid and installed
Destruction of the journey to rotor.
To achieve the goals above, the free blade construction of a kind of steam turbine of the invention, including blade and wheel hub, the leaf
Piece is inverted T shaped or double inverted T-shaped blade, and the wheel hub is equipped with the race of inverted trapezoidal, and the blade includes blade, blade root, described
Blade is set in race, and blade root is fitted close in race, and inserted sheet, half inserted sheet, last inserted sheet are inserted between the adjacent blade root,
Race top side wall is equipped with cylindrical hole, is equipped with junction of the edges of two sheets of paper bolt between the end inserted sheet and blade root.The characteristics of this structure
It is that assembly sealing blade is simple, adjustment blade circumferential thickness is convenient, and the cylindrical hole being equipped with has been to prevent blade root and race from rotating
When interfere.
Further embodiment is that half inserted sheet is divided into two for inserted sheet by symmetrical centre, and the week of inserted sheet and half inserted sheet
Identical with blade root cross-sectional shape to shape, the circumferential shape of the end inserted sheet is the wedge type of approximate blade root cross section.This knot
The characteristics of structure, is, when assembling several blades to the end, when whole inserted sheet assembles relatively difficult, it may not be necessary to revolution space situation
Lower loading, while working as blade root and inserted sheet circumferential direction overall thickness more than race circumferential direction overall thickness, more inserted sheets can suitably be thinned.
Further scheme is that for the blade root without blade root tooth, circumferential is wedge type.The characteristics of this structure is that blade root is thick
Degree is small compared with normal thickness, and inserted sheet and half inserted sheet circumferential shape are identical with blade root, with a thickness of the blade root part smaller than normal thickness, uses
The thickness caused by compensation blade root thickness is insufficient reduces problem.
Further embodiment is that the end inserted sheet is equipped with lightening hole, for the load for reducing clamping screw.
A kind of assembly method of the free blade construction of steam turbine, it is characterised in that include the next steps:
Step 1: after blade radial is inserted into wheel trench bottom, by blade axial-rotation to race is parallel to, blade is constantly finely tuned
Spatial position, blade root circumferential direction race are fitted close；
Step 2: being packed into inserted sheet between adjacent two blades, for filling up the circumferentially insufficient thickness of blade root, when blade root and inserted sheet
When circumferential overall thickness is more than race circumferential direction overall thickness, more inserted sheets can suitably be thinned；
Step 3: when assembling several blades to the end, circumferential assembly space is insufficient, selects the insertion of half inserted sheet；
Step 4: after all inserted sheets and half inserted sheet assemble, last inserted sheet is vertically wedged in rearmost position, whole circle blade is squeezed
Tightly；
Step 5: junction of the edges of two sheets of paper bolt is pierced between last inserted sheet and adjacent blades for locking, completes installation.
The beneficial effects of the present invention are: distinctive assembly is cooperated by the design of inverted T shaped or double inverted T-shaped free blade
Method is easily accomplished the assembly of blade, and the inserted sheet in structure is designed to compensate for the deficiency of blade root circumferential thickness, is more convenient blade
Installation, avoid the destruction in installation process to wheel hub, rotor, while also improving the intensity in structure.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the invention.
Fig. 2 is the partial top view of structure of the invention.
Fig. 3 is the partial side view of structure of the invention.
Fig. 4 is the partial top view of race of the present invention.
Fig. 5 is the partial side view of race of the present invention.
Fig. 6 is the schematic side view of step 1 in assembly method of the present invention.
Fig. 7 is the schematic top plan view of step 1 in assembly method of the present invention
Fig. 8 is the schematic diagram of step 2 in assembly method of the present invention.
Fig. 9 is the schematic diagram of step 3 in assembly method of the present invention.
Figure 10 is the schematic diagram of step 4 in assembly method of the present invention.
Figure 11 is the schematic diagram of step 5 in assembly method of the present invention.
Wherein: blade 1, blade root 2, inserted sheet 3, half inserted sheet 4, last inserted sheet 5, race 6, junction of the edges of two sheets of paper bolt 7, cylindrical hole 8.
Specific embodiment
The present invention is further detailed with reference to embodiments:
Embodiment 1:
As shown in Fig. 1 to 5, the present invention is a kind of free blade construction of steam turbine, including blade and wheel hub, and the blade is T
Type or double inverted T-shaped blade, the wheel hub are equipped with the race 6 of inverted trapezoidal, and the blade includes blade 1, blade root 2, the blade
In race 6, and blade root 2 is fitted close in race 6, inserted sheet 3 is inserted between the adjacent blade root 2, half inserted sheet 4, end are inserted
Piece 5, the 6 top side wall of race is equipped with cylindrical hole 8, to prevent blade root 2 and race 6 from interfering when rotated, the end inserted sheet 4
Junction of the edges of two sheets of paper bolt is equipped between blade root 2.Half inserted sheet 4 is divided into two for inserted sheet 3 by symmetrical centre, and inserted sheet 3 and half inserted sheet 4
Circumferential shape it is identical with blade root cross-sectional shape, the circumferential shape of the end inserted sheet 5 is the wedge type of approximate blade root cross section,
When assembling several blades to the end, when whole inserted sheet assembles relatively difficult, it may not be necessary to be packed into the case of revolution space, work as simultaneously
Blade root and inserted sheet circumferential direction overall thickness are more than race circumferential direction overall thickness, and more inserted sheets can suitably be thinned.The blade root 2 without blade root tooth,
Circumferential is wedge type.Blade root thickness is small compared with normal thickness, and inserted sheet and half inserted sheet circumferential shape are identical with blade root, just with a thickness of blade root ratio
Chang Houdu small part reduces problem for compensating thickness caused by blade root thickness deficiency.The end inserted sheet 5 is equipped with loss of weight
Hole, for the load for reducing clamping screw 7.
A kind of assembly method of the free blade construction of steam turbine, it is characterised in that include the next steps:
As shown in Fig. 6 to 7, step 1: after blade radial is inserted into 6 bottom of race, by blade axial-rotation to be parallel to wheel
Slot, constantly finely tunes blade space position, and the circumferential race 6 of blade root 2 is fitted close；
As shown in figure 8, step 2: inserted sheet 3 is packed between adjacent two blades, for filling up the circumferentially insufficient thickness of blade root,
When blade root 2 and the circumferential overall thickness of inserted sheet 3 are more than 6 circumferential direction overall thickness of race, more inserted sheets 3 can suitably be thinned；
As shown in figure 9, step 3: when assembling several blades to the end, circumferential assembly space is insufficient, selects the insertion of half inserted sheet 4；
As shown in Figure 10, step 4: after all inserted sheets 3 and half inserted sheet 4 assemble, last inserted sheet is vertically wedged in rearmost position
5, by whole circle blade jam-packed；
As shown in figure 11, step 5: junction of the edges of two sheets of paper bolt 7 is pierced between last inserted sheet 5 and adjacent blades for locking, completes installation.
Above-described specific embodiment of the invention carries out the purpose of the present invention, technical scheme and beneficial effects
It is further described.It should be understood that being not used to limit the foregoing is merely a specific embodiment of the invention
Determine protection scope of the present invention.All within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done,
It should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of free blade construction of steam turbine, including blade and wheel hub, it is characterised in that: the blade is inverted T shaped or double T
Type blade, the wheel hub are equipped with the race (6) of inverted trapezoidal, and the blade includes blade (1), blade root (2), and the blade is set to
In race (6), and blade root (2) is fitted close in race (6), and inserted sheet (3) or two panels half are inserted between the adjacent blade root (2)
Inserted sheet (4) or last inserted sheet (5), race (6) the top side wall are equipped with cylindrical hole (8), the end inserted sheet (5) and blade root (2)
Between be equipped with junction of the edges of two sheets of paper bolt.
2. the free blade construction of a kind of steam turbine according to claim 1, which is characterized in that half inserted sheet (4) is slotting
Piece (3) is divided into two by symmetrical centre, and the circumferential shape and blade root of inserted sheet (3) circumferential shape and half inserted sheet of two panels (4) composition
Cross-sectional shape is identical, and the end inserted sheet (5) is wedge type, and its circumferential shape approximation blade root cross section.
3. the free blade construction of a kind of steam turbine according to claim 1, which is characterized in that the blade root (2) is without blade root
Tooth, circumferential is wedge type.
4. the free blade construction of a kind of steam turbine according to claim 1, which is characterized in that set on the end inserted sheet (5)
There is lightening hole.
5. a kind of assembly method of the free blade construction of steam turbine as described in Claims 1-4, it is characterised in that including once
Step:
Step 1: it after blade radial is inserted into race (6) bottom, by blade axial-rotation to race is parallel to, constantly finely tunes
Blade space position is fitted close the circumferential race (6) of blade root (2)；
Step 2: inserted sheet (3) are packed between adjacent two blades, for filling up the circumferentially insufficient thickness of blade root, when blade root (2)
When overall thickness circumferential more than race (6) with the circumferential overall thickness of inserted sheet (3), more inserted sheets (3) can suitably be thinned；
Step 3: when assembling several blades to the end, circumferential assembly space is insufficient, and half inserted sheet of two panels (4) is selected to be inserted into respectively；
Step 4: after all inserted sheets (3) and half inserted sheet (4) assemble, vertically wedging last inserted sheet (5) in rearmost position, will
Whole circle blade jam-packed；
Step 5: junction of the edges of two sheets of paper bolt (7) are pierced between last inserted sheet (5) and adjacent blades for locking, complete installation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910349885.9A CN109931112A (en) | 2019-04-28 | 2019-04-28 | A kind of free blade construction of steam turbine and its assembly method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910349885.9A CN109931112A (en) | 2019-04-28 | 2019-04-28 | A kind of free blade construction of steam turbine and its assembly method |
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| Publication Number | Publication Date |
|---|---|
| CN109931112A true CN109931112A (en) | 2019-06-25 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910349885.9A Pending CN109931112A (en) | 2019-04-28 | 2019-04-28 | A kind of free blade construction of steam turbine and its assembly method |
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| Country | Link |
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| CN (1) | CN109931112A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780351A (en) * | 2019-11-07 | 2021-05-11 | 中国航发商用航空发动机有限责任公司 | Aeroengine rotor and aeroengine |
| CN114705413A (en) * | 2022-04-15 | 2022-07-05 | 北京航空航天大学 | Blade mounting structure and method fastened by main flow aerodynamic force and application thereof |
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|---|---|---|---|---|
| CN1263204A (en) * | 1999-02-12 | 2000-08-16 | Abb阿尔斯通电力(瑞士)股份公司 | Fixing component of rotating blade of fluid flow machine |
| CN204041124U (en) * | 2014-09-17 | 2014-12-24 | 杭州汽轮机股份有限公司 | Steam turbine blade screw rod in last years of a century locking mechanism |
| EP2886799A1 (en) * | 2013-12-20 | 2015-06-24 | Siemens Aktiengesellschaft | Blade ring for a turbomachine and method for mounting blades of a blade ring of a turbomachine |
| CN106271378A (en) * | 2015-06-09 | 2017-01-04 | 上海汽轮机厂有限公司 | Moving vane assembly method on turbine rotor |
| US20170145841A1 (en) * | 2014-07-08 | 2017-05-25 | Safran Aircraft Engines | Mounting of vanes at the periphery of a turbine engine disc |
| CN209704643U (en) * | 2019-04-28 | 2019-11-29 | 杭州汽轮机股份有限公司 | A kind of free blade construction of steam turbine |
-
2019
- 2019-04-28 CN CN201910349885.9A patent/CN109931112A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1263204A (en) * | 1999-02-12 | 2000-08-16 | Abb阿尔斯通电力(瑞士)股份公司 | Fixing component of rotating blade of fluid flow machine |
| EP2886799A1 (en) * | 2013-12-20 | 2015-06-24 | Siemens Aktiengesellschaft | Blade ring for a turbomachine and method for mounting blades of a blade ring of a turbomachine |
| US20170145841A1 (en) * | 2014-07-08 | 2017-05-25 | Safran Aircraft Engines | Mounting of vanes at the periphery of a turbine engine disc |
| CN204041124U (en) * | 2014-09-17 | 2014-12-24 | 杭州汽轮机股份有限公司 | Steam turbine blade screw rod in last years of a century locking mechanism |
| CN106271378A (en) * | 2015-06-09 | 2017-01-04 | 上海汽轮机厂有限公司 | Moving vane assembly method on turbine rotor |
| CN209704643U (en) * | 2019-04-28 | 2019-11-29 | 杭州汽轮机股份有限公司 | A kind of free blade construction of steam turbine |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112780351A (en) * | 2019-11-07 | 2021-05-11 | 中国航发商用航空发动机有限责任公司 | Aeroengine rotor and aeroengine |
| CN114705413A (en) * | 2022-04-15 | 2022-07-05 | 北京航空航天大学 | Blade mounting structure and method fastened by main flow aerodynamic force and application thereof |
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