CN101837482B - Processing technology of steam turbine seven-fork blade root pin holes and special fixture - Google Patents
Processing technology of steam turbine seven-fork blade root pin holes and special fixture Download PDFInfo
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- CN101837482B CN101837482B CN 200910030346 CN200910030346A CN101837482B CN 101837482 B CN101837482 B CN 101837482B CN 200910030346 CN200910030346 CN 200910030346 CN 200910030346 A CN200910030346 A CN 200910030346A CN 101837482 B CN101837482 B CN 101837482B
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Abstract
The invention relates to a processing technology of steam turbine seven-fork blade root pin holes and a special fixture. A blade root is provided with seven forks for installation, wherein the two forks in the middle side of the seven forks are staggered with the five forks in the inner part; the five forks in the inner part are successively provided with three pin holes along the radial line direction of a steam turbine; the two forks on the outer side are successively provided with three first semicircle pin holes on the same axis with the above three pin holes and are provided with other three second semicircle pin holes on the same axis with the pin holes on the inner five forks on the adjacent blade; the first semicircle pin holes and the second semicircle pin holes on the two forks on the outer side of adjacent two seven-fork blades are spliced into a full circle pin hole; and multiple blades are radially arranged on the circumstance of the steam turbine. The fixture is providedwith a cavity capable of containing the roots of the seven forks of the two adjacent blades and is provided with a device which makes two blade roots to be jointly installed on the steam turbine position relation status and makes the two blade roots to be fixed on the fixture; and the fixture is provided with a drilling guide hole correspondingly on the axis of the full circle pin hole spliced bythe first semicircle pin holes and the second semicircle pin holes on the two blade roots.
Description
Technical field
The present invention relates to processing technology and the special fixture of a kind of steam turbine blade root pin-and-hole processing technology and turbine rotor blade root pin-and-hole fixture for processing field, especially steam turbine seven-fork blade root pin holes.
Background technology
The 30WKW turbine blade of my company's processing, final stage is saddle-shape seven forks three step blade roots, changes rotation with per minute 3000 during owing to blade working, can produce huge centrifugal force, so, the pin between connection blade and the impeller and positional precision and the roughness of pin-and-hole are had high requirements.Blade root need be processed totally 6 half holes and whole hole, wherein radially fitting surface be 3 half holes, carrying on the back radially, fitting surface is half hole, non-fitting surface is whole hole, and this blade root fork-shaped molded lines complexity, drilling depth is darker, the aperture is little, difficulty of processing is very big, as waters square chest at the square chest state, advances the processing of steam output side two sides from blade root with whole alloy knife respectively at horizontal Machining centers, because cutter too carefully has cutter relieving, phenomenon fractures, and exist half hole and whole hole alternately to occur, the hole site precision of processing is difficult to guarantee, has a strong impact on product quality.
Summary of the invention
The technical problem to be solved in the present invention is: processing technology and special fixture that the high steam turbine seven-fork blade root pin holes of a kind of machining accuracy is provided.
The technical solution adopted for the present invention to solve the technical problems is: a kind of special fixture of steam turbine seven-fork blade root pin holes, the root of this blade has for seven forks installing, the outside two forks in seven forks are pitched the setting of staggering with five of inside, stick along all being disposed with three pin-and-holes on the steam turbine radial line direction five of inside, three first semi-circle pin holes that are disposed with aforementioned three pin-and-hole coaxial lines are stuck in the outside two, the outside two stick also be provided with adjacent blades on inner five three second semi-circle pin holes in addition of sticking the pin-and-hole coaxial line, first semi-circle pin holes and second semi-circle pin holes that stick in the outside two of adjacent two seven fork blades are combined into the full circle pin-and-hole, the radial circumferential arrangement of a plurality of one-tenth of this blade is on steamer, it is characterized in that: anchor clamps have the cavity that holds two adjacent blades, seven fork roots, anchor clamps are provided with and two blade roots are same as be installed in steam turbine position relation condition and make two blade roots to be fixed in the device of anchor clamps, and the full circle pin-and-hole axis that is combined into corresponding to first semi-circle pin holes on two blade roots and second semi-circle pin holes on the anchor clamps is provided with the drilling pilot hole.
In order to guarantee when the drilling pin-and-hole, drill bit is sideslip and prevent that drill bit from fractureing, the drill bushing of edge in described drilling pilot hole has not.
In order better to fix the fork of blade root, described anchor clamps inside is provided with the supporting construction of placing fork.
Carry out the drilling of pin-and-hole for convenience, be positioned at place, two ends, vane pin hole on the described anchor clamps and also all be provided with the drilling pilot hole.
For when carrying out the drilling of pin-and-hole, make blade and blade root more fastening, the device that makes two blade roots be fixed in anchor clamps on the described anchor clamps has from blade root and blade working blade face transition position step presses to first fastening bolt of clamp base with blade root and two blade roots is pressed to second fastening bolt of anchor clamps sidewall from the blade root side.
Maintenance for convenience and adjustment anchor clamps, described anchor clamps are removable minute body structure.
Used the processing technology of the steam turbine seven-fork blade root pin holes of above-mentioned special fixture, the root of this blade has for seven forks installing, the outside two forks in seven forks are pitched the setting of staggering with five of inside, stick along all being disposed with three pin-and-holes on the steam turbine radial line direction five of inside, three first semi-circle pin holes that are disposed with aforementioned three pin-and-hole coaxial lines are stuck in the outside two, the outside two stick also be provided with adjacent blades on inner five three second semi-circle pin holes in addition of sticking the pin-and-hole coaxial line, first semi-circle pin holes and second semi-circle pin holes that stick in the outside two of adjacent two seven fork blades are combined into the full circle pin-and-hole, the radial circumferential arrangement of a plurality of one-tenth of this blade is characterized in that having following technical process on steamer:
(1), the order of blade by the circumferential arrangement on steamer is numbered;
(2), seven fork blade roots with the first and second adjacent blades are fixed on the special fixture according to the mutual alignment mode that is installed on the steamer;
(3), utilize pilot hole drilling on the special fixture to process three pin-and-holes of inner five forks on second blade and be spliced into first semi-circle pin holes on second blade of full circle and second semi-circle pin holes on first blade;
(4), pull down first blade from anchor clamps, second blade is transferred to the position of first blade, the 3rd blade is placed into the position of former second blade, and fixes the second and the 3rd blade and carry out the boring processing same with above-mentioned third step;
(5), pull down second blade, mobile the 3rd blade is to the position of former second blade, place quaterfoil to former three-vaned position, clamping third and fourth blade, repetition drilling processing, and the like carry out the 4th, the 5th, the 6th ... etc. processing of leaves, after the most end blade is holed, on anchor clamps, drilling is processed inner five three pin-and-holes pitching on first blade and is spliced into first semi-circle pin holes on first blade of full circle and second semi-circle pin holes on the most end blade with most end blade and first vanes fixed adjacent with it; Finish the drilling processing of all blade root pin-and-holes.
In order to improve the accuracy of pin-and-hole, when pin-and-hole on seven fork blades is processed in the drilling in described process (three) to (five), use three drill bits to carry out the drilling first time, carry out the drilling second time from the pin-and-hole other end again from pin-and-hole one end.
The invention has the beneficial effects as follows that the structure that arranges of the present invention is when making the drilling pin-and-hole, can guarantee precision and the roughness of pin-and-hole, guarantee the matching requirements of blade and impeller, and reduce the length of drill bit, improve the service life of drill bit, simple to operate, improved the quality of production efficiency and product.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the structural representation of blade.
Fig. 2 is left view of the present invention.
Fig. 3 is front view of the present invention.
Among the figure: 1. first semi-circle pin holes, 2. second semi-circle pin holes, 3. drilling pilot holes, 4. first trip bolts, 5. second trip bolts.
The specific embodiment
A kind of clamp for machining of steam turbine seven-fork blade root pin holes, the root of this blade has for seven forks installing, the outside two forks in seven forks are pitched the setting of staggering with five of inside, stick along all being disposed with three pin-and-holes on the steam turbine radial line direction five of inside, three first semi-circle pin holes 1 that are disposed with aforementioned three pin-and-hole coaxial lines are stuck in the outside two, the outside two stick also be provided with adjacent blades on inner five three second semi-circle pin holes 2 in addition of sticking the pin-and-hole coaxial line, first semi-circle pin holes 1 and second semi-circle pin holes 2 that stick in the outside two of adjacent two seven fork blades are combined into the full circle pin-and-hole, the radial circumferential arrangement of a plurality of one-tenth of this blade is on steamer, it is characterized in that: anchor clamps have the cavity that holds two adjacent blades, seven fork roots, anchor clamps are provided with and two blade roots are same as be installed in steam turbine position relation condition and make two blade roots to be fixed in the device of anchor clamps, and the full circle pin-and-hole axis that is combined into corresponding to first semi-circle pin holes 1 on two blade roots and second semi-circle pin holes 2 on the anchor clamps is provided with drilling pilot hole 3.
The drill bushing of edge can guarantee when the drilling pin-and-hole in described drilling pilot hole had, and drill bit is sideslip and prevent that drill bit from fractureing not.
Described anchor clamps inside is provided with the supporting construction of placing fork, the fork that can better fix blade root,
Be positioned at place, two ends, vane pin hole on the described anchor clamps and also all be provided with drilling pilot hole 3, when carrying out drilling, can the more convenient drilling of carrying out pin-and-hole.
The device that makes two blade roots be fixed in anchor clamps on the described anchor clamps has from blade root and blade working blade face transition position step presses to first fastening bolt 4 of clamp base with blade root and two blade roots is pressed to second fastening bolt 5 of anchor clamps sidewall from the blade root side, can be when carrying out the drilling of pin-and-hole, make blade and blade root more fastening, avoid when drilling, cause the not high phenomenon of drilling accuracy.
Described anchor clamps are removable minute body structure, convenient for maintaining and adjustment anchor clamps.
The clamp for machining of above-mentioned steam turbine seven-fork blade root pin holes adds man-hour to pin-and-hole, the processing technology of its steam turbine seven-fork blade root pin holes, the root of this blade has for seven forks installing, the outside two forks in seven forks are pitched the setting of staggering with five of inside, stick along all being disposed with three pin-and-holes on the steam turbine radial line direction five of inside, three first semi-circle pin holes that are disposed with aforementioned three pin-and-hole coaxial lines are stuck in the outside two, the outside two stick also be provided with adjacent blades on inner five three second semi-circle pin holes in addition of sticking the pin-and-hole coaxial line, first semi-circle pin holes and second semi-circle pin holes that stick in the outside two of adjacent two seven fork blades are combined into the full circle pin-and-hole, the radial circumferential arrangement of a plurality of one-tenth of this blade is characterized in that having following technical process on steamer:
(1), the order of blade by the circumferential arrangement on steamer is numbered;
(2), seven fork blade roots with the first and second adjacent blades are fixed on the special fixture according to the mutual alignment mode that is installed on the steamer;
(3), utilize pilot hole drilling on the special fixture to process three pin-and-holes of inner five forks on second blade and be spliced into first semi-circle pin holes on second blade of full circle and second semi-circle pin holes on first blade;
(4), pull down first blade from anchor clamps, second blade is transferred to the position of first blade, the 3rd blade is placed into the position of former second blade, and fixes the second and the 3rd blade and carry out the boring processing same with above-mentioned third step;
(5), pull down second blade, mobile the 3rd blade is to the position of former second blade, place quaterfoil to former three-vaned position, clamping third and fourth blade, repetition drilling processing, and the like carry out the 4th, the 5th, the 6th ... etc. processing of leaves, after the most end blade is holed, on anchor clamps, drilling is processed inner five three pin-and-holes pitching on first blade and is spliced into first semi-circle pin holes on first blade of full circle and second semi-circle pin holes on the most end blade with most end blade and first vanes fixed adjacent with it; Finish the drilling processing of all blade root pin-and-holes.
In order to improve the accuracy of pin-and-hole, when pin-and-hole on seven fork blades is processed in the drilling in described process (three) to (five), use three drill bits to carry out the drilling first time, carry out the drilling second time from the pin-and-hole other end again from pin-and-hole one end.
Claims (8)
1. the special fixture of a steam turbine seven-fork blade root pin holes, the root of this blade has for seven forks installing, the outside two forks in seven forks are pitched the setting of staggering with five of inside, stick along all being disposed with three pin-and-holes on the steam turbine radial line direction five of inside, three first semi-circle pin holes (1) that are disposed with aforementioned three pin-and-hole coaxial lines are stuck in the outside two, the outside two stick also be provided with adjacent blades on inner five three second semi-circle pin holes (2) in addition of sticking the pin-and-hole coaxial line, first semi-circle pin holes (1) and second semi-circle pin holes (2) that stick in the outside two of adjacent two seven fork blades are combined into the full circle pin-and-hole, the radial circumferential arrangement of a plurality of one-tenth of this blade is on steamer, it is characterized in that: anchor clamps have the cavity that holds two adjacent blades, seven fork roots, anchor clamps are provided with and two blade roots are same as be installed in steam turbine position relation condition and make two blade roots to be fixed in the device of anchor clamps, and the full circle pin-and-hole axis that is combined into corresponding to first semi-circle pin holes (1) on two blade roots and second semi-circle pin holes (2) on the anchor clamps is provided with drilling pilot hole (3).
2. the special fixture of steam turbine seven-fork blade root pin holes according to claim 1 is characterized in that: the drill bushing of edge in described drilling pilot hole has.
3. the special fixture of steam turbine seven-fork blade root pin holes according to claim 1 is characterized in that: described anchor clamps inside is provided with the supporting construction of placing fork.
4. the special fixture of steam turbine seven-fork blade root pin holes according to claim 1 is characterized in that: be positioned at place, two ends, vane pin hole on the described anchor clamps and also all be provided with drilling pilot hole (3).
5. the special fixture of steam turbine seven-fork blade root pin holes according to claim 1 is characterized in that: the device that makes two blade roots be fixed in anchor clamps on the described anchor clamps has from blade root and blade working blade face transition position step presses to first fastening bolt (4) of clamp base with blade root and two blade roots is pressed to second fastening bolt (5) of anchor clamps sidewall from the blade root side.
6. the special fixture of steam turbine seven-fork blade root pin holes according to claim 1, it is characterized in that: described anchor clamps are removable minute body structure.
7. the processing technology of the steam turbine seven-fork blade root pin holes of a special fixture that has used the described steam turbine seven-fork blade root pin holes of claim 1, the root of this blade has for seven forks installing, the outside two forks in seven forks are pitched the setting of staggering with five of inside, stick along all being disposed with three pin-and-holes on the steam turbine radial line direction five of inside, three first semi-circle pin holes that are disposed with aforementioned three pin-and-hole coaxial lines are stuck in the outside two, the outside two stick also be provided with adjacent blades on inner five three second semi-circle pin holes in addition of sticking the pin-and-hole coaxial line, first semi-circle pin holes and second semi-circle pin holes that stick in the outside two of adjacent two seven fork blades are combined into the full circle pin-and-hole, the radial circumferential arrangement of a plurality of one-tenth of this blade is characterized in that having following technical process on steamer:
(1), the order of blade by the circumferential arrangement on steamer is numbered;
(2), seven fork blade roots with the first and second adjacent blades are fixed on the special fixture according to the mutual alignment mode that is installed on the steamer;
(3), utilize pilot hole drilling on the special fixture to process three pin-and-holes of inner five forks on second blade and be spliced into first semi-circle pin holes on second blade of full circle and second semi-circle pin holes on first blade;
(4), pull down first blade from anchor clamps, second blade is transferred to the position of first blade, the 3rd blade is placed into the position of former second blade, and fixes the second and the 3rd blade and carry out the boring processing same with above-mentioned third step;
(5), pull down second blade, mobile the 3rd blade is to the position of former second blade, place quaterfoil to former three-vaned position, clamping third and fourth blade, repetition drilling processing, and the like carry out the 4th, the 5th, the 6th ... etc. processing of leaves, after the most end blade is holed, on anchor clamps, drilling is processed inner five three pin-and-holes pitching on first blade and is spliced into first semi-circle pin holes on first blade of full circle and second semi-circle pin holes on the most end blade with most end blade and first vanes fixed adjacent with it; Finish the drilling processing of all blade root pin-and-holes.
8. the processing technology of steam turbine seven-fork blade root pin holes according to claim 7, it is characterized in that: when pin-and-hole on seven fork blades is processed in the drilling in described process (three) to (five), use three drill bits to carry out the drilling first time, carry out the drilling second time from the pin-and-hole other end again from pin-and-hole one end.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 200910030346 CN101837482B (en) | 2009-03-16 | 2009-03-16 | Processing technology of steam turbine seven-fork blade root pin holes and special fixture |
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| CN 200910030346 CN101837482B (en) | 2009-03-16 | 2009-03-16 | Processing technology of steam turbine seven-fork blade root pin holes and special fixture |
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| CN101837482A CN101837482A (en) | 2010-09-22 |
| CN101837482B true CN101837482B (en) | 2013-09-25 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102000995B (en) * | 2010-11-12 | 2012-10-10 | 无锡明珠增压器制造有限公司 | Machining clamp of volute casing door cover rocking handle hole |
| CN102847989A (en) * | 2011-10-28 | 2013-01-02 | 南通天华和睿科技创业有限公司 | Auxiliary guide shaft sleeve for processing holes |
| CN104772604B (en) * | 2015-04-03 | 2017-03-08 | 重庆江增船舶重工有限公司 | The processing method of steam jet on steam turbine spray vapour cover plate |
| CN105290441B (en) * | 2015-10-26 | 2017-06-23 | 哈尔滨汽轮机厂有限责任公司 | A kind of processing method of turbine rotor blade root rotating blade assembly final blage rivet hole |
| CN105437087B (en) * | 2015-12-27 | 2017-10-13 | 无锡透平叶片有限公司 | General shot-peening fixture for compressor blade blade root bead |
| CN108757299B (en) * | 2018-05-11 | 2023-05-23 | 上海玻璃钢研究院东台有限公司 | Pre-buried bolt structure of slide positioning formula wind-powered electricity generation blade root |
| CN111791019A (en) * | 2020-06-24 | 2020-10-20 | 哈尔滨汽轮机厂有限责任公司 | Device and method for machining and positioning mounting hole of high-medium pressure rotor regulating stage of steam turbine |
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|---|---|---|---|---|
| CN201070687Y (en) * | 2007-06-25 | 2008-06-11 | 哈尔滨汽轮机厂有限责任公司 | Turbine rotor fork shaped blade root pin-and-hole split fork space spotting drill mould |
| CN201371366Y (en) * | 2009-03-16 | 2009-12-30 | 常州市三维技术成套设备有限公司 | Processing fixture for 7-fork blade root pin hole of steam turbine |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2753236B2 (en) * | 1987-10-23 | 1998-05-18 | 株式会社日立製作所 | Blade root structure of turbomachinery |
| JP2000220406A (en) * | 1999-01-28 | 2000-08-08 | Hitachi Ltd | Steam turbine rotor |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201070687Y (en) * | 2007-06-25 | 2008-06-11 | 哈尔滨汽轮机厂有限责任公司 | Turbine rotor fork shaped blade root pin-and-hole split fork space spotting drill mould |
| CN201371366Y (en) * | 2009-03-16 | 2009-12-30 | 常州市三维技术成套设备有限公司 | Processing fixture for 7-fork blade root pin hole of steam turbine |
Non-Patent Citations (2)
| Title |
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| JP特开2000-220406A 2000.08.08 |
| JP特开平1-110805A 1989.04.27 |
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