CN101640457B - Method for installing AC/AC variable-frequency steel-rolling motor rotors and its magnetic poles - Google Patents
Method for installing AC/AC variable-frequency steel-rolling motor rotors and its magnetic poles Download PDFInfo
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- CN101640457B CN101640457B CN2008100412383A CN200810041238A CN101640457B CN 101640457 B CN101640457 B CN 101640457B CN 2008100412383 A CN2008100412383 A CN 2008100412383A CN 200810041238 A CN200810041238 A CN 200810041238A CN 101640457 B CN101640457 B CN 101640457B
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Abstract
The invention discloses a rotor structure for AC/AC variable-frequency steel-rolling motors, and a method for installing magnetic poles. The rotor structure comprises a rotation shaft and a plurality of pairs of magnetic poles, wherein the bottom surface of each magnetic-pole core is provided with a pole-mounting screw; the rotation shaft is in a three-section structure forged in sections, namely a middle section is a hollow shaft and the remaining two sections connected are straight solid shafts; the center of the end face of a pole body of each magnetic-pole core is provided with a through hole along the axial direction, and a pull rod is rotatably placed in the through hole; a gap groove which is coaxial with the through hole, has the width larger than the diameter of the pole-mounting screws and is communicated with the through hole is arranged on the bottom surface of the pole body of each magnetic-pole core; the pull rod is axially provided with uniformly distributed threaded holes which have the same quantity with the pole-mounting screws and are in screwed fit with the pole-mounting screws; one end of each pole-mounting screw is in screwed connection with the threaded holes on the pull rod through the gap groove on the bottom surface of the pole body of the magnetic-pole core; and the other end of each pole-mounting screw passes through a mounting hole on the wall surface of the hollow shaft and connects the magnetic pole with the peripheral surface of the hollow shaft through a pole-mounting nut.
Description
Technical field
The present invention relates to a kind of method for installing magnetic poles of AC/AC (alternating current) variable-frequency steel-rolling motor rotor.
Background technology
High-power, slow-speed of revolution frequency control roughing motor is the roughing motor of capacity 7200kW, and number of poles is 16P, and voltage is 3000V, and rotating speed is 40～80r/min, and rotor diameter is 3030mm, and length overall is 7407mm.Usually the fixed form of magnetic pole has following several: first magnetic pole bottom is done "T"-shaped or two "T"-shaped, and magnetic pole is packed into and fixed magnetic pole with beating the taper key method behind the corresponding "T"-shaped groove of yoke; It two is that " dove tail " shape is made in the magnetic pole bottom, and magnetic pole is packed into and fixed magnetic pole with beating the taper key method behind yoke correspondence " dove tail " the shape groove.These two kinds of methods all will be slotted in yoke surfaces, are used in hollow shaft wall thickness 160mm and go up obvious insufficient strength.The third method is exactly the most frequently used magnetic pole bottom loading screw method.But loading screw structure magnetic pole can only be used for short iron core and less magnetic pole usually, and this roughing of picture motor pole long 2000mm unshakable in one's determination, the heavy 1880kg of magnetic pole, also need solve the control of magnetic pole axial dimension in the installation, standing screw such as entad adjusts at problem, therefore need to improve the structure of magnetic pole and the installation method of magnetic pole, and the key of rotor dress magnetic pole is to guarantee that contact and coil and magnetic pole liner obtain cushion block and effectively support pole core bottom surface circular arc fully with yoke surfaces.
Summary of the invention
The objective of the invention is provides a kind of field structure and method for installing magnetic poles of AC/AC (alternating current) variable-frequency steel-rolling motor rotor of magnetic pole accurate positioning in order to overcome the deficiencies in the prior art, and its rigidity intensity is higher, and dress utmost point screw rod is entad easy to adjust.
A kind of technical scheme that realizes above-mentioned purpose is: a kind of rotor structure of AC/AC (alternating current) variable-frequency steel-rolling motor, comprise rotating shaft and several to magnetic pole, described each magnetic pole comprises pole core with pole body and pole shoe, be sleeved on the pole body and be respectively equipped with pole coil and some dress utmost point screw rods that axially is distributed on the pole core bottom surface of magnetic pole liner on the upper and lower end face, wherein
Described rotating shaft is the three stage structure of setting down, and promptly interlude is a hollow shaft, and its wall thickness forms the yoke of rotor, and all the other are connected two sections solid shaftings that are diameter less than the hollow shaft diameter at hollow shaft two ends;
The pole body end face center of described pole core is offered a through hole vertically and place a pull bar rotationally in this through hole, offers a width coaxially greater than dress utmost point screw diameter and be communicated with the gap slot of described through hole with through hole on the pole body bottom surface of described pole core;
Axially offer in uniform way on the described pull bar with adorn utmost point screw rod quantity consistent and with adorn utmost point screw rod and revolve the screwed hole of joining;
One end of described dress utmost point screw rod spins by gap slot on the magnetic pole pole body bottom surface and the screwed hole on the pull bar;
The other end of described dress utmost point screw rod passes the installing hole on the hollow shaft wall and by the dress utmost point nut magnetic pole is connected on the outer peripheral face of hollow shaft.
The rotor structure of above-mentioned AC/AC (alternating current) variable-frequency steel-rolling motor, wherein, also be provided with four stretching screw holes vertically around through hole on the pole body end face of described pole core and place a stretching screw in each stretching screw hole, two that this stretching screw stretches out the pole body end face axially fastens pole core by tightening nut.
The rotor structure of above-mentioned AC/AC (alternating current) variable-frequency steel-rolling motor, wherein, the width of described gap slot is greater than 22%～27% of dress utmost point screw diameter, make dress utmost point screw rod in this gap slot can about swing.
The rotor structure of above-mentioned AC/AC (alternating current) variable-frequency steel-rolling motor, wherein, the quantity of described dress utmost point screw rod is that the length of six～eight and visual pole core is determined.
The rotor structure of above-mentioned AC/AC (alternating current) variable-frequency steel-rolling motor wherein, also is provided with the cushion block of bottom surface and hollow shaft surface circular arc coupling between magnetic pole liner on the described pole coil and the hollow shaft surface.
The another kind of technical scheme that realizes above-mentioned purpose is: a kind of method for installing magnetic poles of AC/AC (alternating current) variable-frequency steel-rolling motor rotor, and this method comprises:
Horizontal the resting on the shelf and at rotating shaft one end of rotating shaft installed a Special disc sweep; On pull bar, a guide post is installed respectively, dress utmost point screw rod is installed in all the other screwed holes near in two screwed hole of pole core end; Special cart and be pushed into the installation site of the aligned beneath hollow shaft of hollow shaft on the magnetic pole; Special cart is sling together with magnetic pole, made in the installing hole on guide post and the dress utmost point screw rod insertion hollow shaft wall dress utmost point nut on the pretension dress utmost point screw rod; Inspection magnetic pole liner and cushion block surface should not have the gap, and the part should be less than 0.5mm; Remove the guide post at pull bar two, replace dress utmost point screw rod and pretension dress utmost point nut are installed; By stretching tool stretching dress utmost point screw rod; Be wrenched all dress utmost point nuts by fastened tools, finish the installation of a magnetic pole.
The method for installing magnetic poles of above-mentioned AC/AC (alternating current) variable-frequency steel-rolling motor rotor, wherein, described dress utmost point screw rod is brushed with binding agent at the connecting portion with pull bar, and is brushing lubricating oil with the connecting portion of dress utmost point nut.
The method for installing magnetic poles of above-mentioned AC/AC (alternating current) variable-frequency steel-rolling motor rotor, wherein, described stretching dress utmost point screw rod is to adopt from the centre to the mode of two alternating tensile three alternating tensiles before and after the every dress utmost point screw rod
The method for installing magnetic poles of above-mentioned AC/AC (alternating current) variable-frequency steel-rolling motor rotor, wherein, described stretching tool is the hydraulic tensioning device, the oil pressure during stretching is 50MPa.
The method for installing magnetic poles of above-mentioned AC/AC (alternating current) variable-frequency steel-rolling motor rotor, wherein, after also being included in the installation of finishing first magnetic pole, drive the jiggering plate by crane and rotate 180 °, repeat above-mentioned installation steps second magnetic pole is installed, make the jiggering plate rotate 90 ° afterwards again, installs second pair of magnetic pole also and the like finish the installation of all magnetic poles.
The technical scheme of the rotor structure of AC/AC (alternating current) variable-frequency steel-rolling motor of the present invention and the installation method of magnetic pole, the rigidity that pull bar and stretching screw increase whole magnetic pole is axially put in employing in pole core, axial uniform several screwed holes on the pull bar, for the dress utmost point screw rod magnetic pole is fixedlyed connected with yoke, and the maximum characteristics of this structure are firmly to shake dress utmost point screw end head can make pull bar rotate a low-angle, entad make dress utmost point screw rod when being convenient to install, the accurate positioning and fixing of magnetic pole, the gap slot of offering on the pole core bottom surface in addition, can avoiding after the assembling unshakable in one's determination again, boring causes the cleaning difficulty.After adopting the installation method of magnetic pole of the present invention, solved large-scale magnetic pole handling, stood up; Axially, a radial location difficult problem, magnetic pole is installed one-time-reach-place, rotor inspection, electromechanical testing once pass through, and provide strong technical guarantee for producing large-scale hot rolling motor.
Description of drawings
Fig. 1 is the field structure schematic diagram of AC/AC (alternating current) variable-frequency steel-rolling motor rotor of the present invention;
Fig. 2 is the field structure cutaway view of AC/AC (alternating current) variable-frequency steel-rolling motor rotor of the present invention;
Fig. 3 is the state diagram of the method for installing magnetic poles of AC/AC (alternating current) variable-frequency steel-rolling motor rotor of the present invention.
Embodiment
In order to understand technical scheme of the present invention better, below by embodiment particularly and be described in detail in conjunction with the accompanying drawings:
See also Fig. 1 and Fig. 2, the rotor structure of AC/AC (alternating current) variable-frequency steel-rolling motor of the present invention comprises rotating shaft 1 and several to magnetic pole 2, wherein,
Rotating shaft 1 is the three stage structure of setting down, be that interlude is a hollow shaft 10, hollow shaft 10 adopts the round as a ball and welding of the thick Q235-A steel plate of 180mm, and its wall thickness forms the yoke of rotor, and all the other are connected two sections solid shaftings 11,12 that are diameter less than the hollow shaft diameter at hollow shaft 10 two ends;
Each magnetic pole 2 comprises pole core, is sleeved on pole coil 20 and some dress utmost point screw rods 23 that axially is distributed on the pole core bottom surface on the pole core, and pole core comprises pole body 21 and pole shoe 22; Be respectively equipped with magnetic pole liner 200 on the upper and lower end face of pole coil 20; The quantity of dress utmost point screw rod 23 is that the length of six～eight and visual pole core is determined;
The pole body 21 end face centers of pole core are offered a through hole vertically and place a pull bar 24 rotationally in this through holes, offer a width coaxially greater than dress utmost point screw rod 23 diameters and be communicated with the gap slot 25 of through hole with through hole on pole body 21 bottom surfaces of pole core, the width of this gap slot 25 is greater than 22%～27% of dress utmost point screw rod 23 diameters, make dress utmost point screw rod 23 in this gap slot 25 can about swing;
Also be provided with four stretching screw holes vertically around the through hole on pole body 21 end faces of pole core and place a stretching screw 26 in each stretching screw hole, two that this stretching screw 26 stretches out pole body 21 end faces axially fastens pole core by tightening nut 27;
Axially offer in uniform way on the pull bar 24 with adorn utmost point screw rod 23 quantity consistent and with adorn utmost point screw rod 23 and revolve the screwed hole of joining;
One end of dress utmost point screw rod 23 spins by gap slot on magnetic pole pole body 21 bottom surfaces 25 and screwed hole on the pull bar 24, and the other end of dress utmost point screw rod 23 passes the installing hole on hollow shaft 10 walls and by dress utmost point nut 28 magnetic pole 2 is connected on the outer peripheral face of hollow shaft 10;
Also be provided with the cushion block 29 of bottom surface and hollow shaft surface circular arc coupling between magnetic pole liner 200 on the pole coil 20 and hollow shaft 10 surfaces.
See also Fig. 3 again, the method for installing magnetic poles of AC/AC (alternating current) variable-frequency steel-rolling motor rotor of the present invention comprises:
Earlier at hollow shaft 10 (yoke) mounted on surface cushion block 29 and process planar section on the cushion block 29;
Rotating shaft 1 horizontal resting on the shelf and at rotating shaft 10 unsupported ends installed a Special disc sweep 3; Shelf is made of shelf body 41 and square chest 42 that is supported on shelf body 41 lower ends;
On pull bar 24, a guide post 5 is installed respectively, dress utmost point screw rod 23 is installed in all the other screwed holes, play protection product dress utmost point screw rod 23 and the positioning action of magnetic pole 2 in rotating shaft 1 near in two screwed hole of pole core end; Guide post 5 is a frock, and length is longer than dress utmost point screw rod 23, and diameter is than the little 0.5～0.7mm of screwed hole of hollow shaft 10 magnetic poles; Dress utmost point screw rod 23 is brushed with binding agent at the connecting portion with pull bar 24;
With crane special cart 6 is sling together with magnetic pole 2, made in the installing hole on guide post 5 and dress utmost point screw rod 23 insertion hollow shafts 10 walls dress utmost point nut 28 on the pretension dress utmost point screw rod 23; Dress utmost point screw rod 23 is being brushed lubricating oil with the connecting portion of dress utmost point nut 28; When pretension dress utmost point nut 28, because the width of gap slot 25 is greater than 22%～27% of dress utmost point screw rod 23 diameters, make dress utmost point screw rod 23 in this gap slot 25 can about swing, and can make pull bar 23 rotate a low-angle automatically, make dress utmost point screw rod 23 entad reach magnetic pole 2 accurate positioning and fixing when being convenient to install;
The magnetic pole liner 200 of checking pole coil 20 bottoms should not have the gap with cushion block 29 surfaces, and the part should be less than 0.5mm; Cushion block 29 has been put surplus adding on the single-piece in man-hour, dress cushion block 29 back processing planes on the yoke, the plane from yoke apart from tolerance at 0～0.1mm, pole core is contacted fully with yoke surfaces, the keys that while magnetic pole liner 200 is effectively supported by cushion block 29 are reconditioning magnetic pole liners 200, put surplus 0～0.5mm in the time of 200 reconditionings of magnetic pole liner, magnetic pole liner 200 is 0.5mm (unshakable in one's determination with yoke not tightening state) with maximal clearance between cushion block 29 parts during installation;
Remove the guide post 5 at pull bar 24 two, replace dress utmost point screw rod 23 and pretension dress utmost point nut 28 are installed; Dress utmost point screw rod 23 is brushed with binding agent at the connecting portion with pull bar 24, and with the connecting portion brush lubricating oil of dress utmost point nut 28;
By stretching tool 7 stretching dress utmost point screw rods; This stretching tool 7 is the hydraulic tensioning device, and the oil pressure during stretching is 50MPa; Employing to the mode of two alternating tensile, is adorned three alternating tensiles in utmost point screw rod 23 front and back from the centre for every;
Be wrenched all dress utmost point nuts 28 by fastened tools, finish the installation of a magnetic pole, fastened tools is fastening rod;
After the installation of finishing first magnetic pole 2, drive jiggering plate 3 by crane and rotate 180 °, repeat above-mentioned installation steps second magnetic pole 2 be installed, make jiggering plate 3 rotate 90 ° afterwards again, installs second pair of magnetic pole 2 also and the like finish the installation of all magnetic poles 2.
After adopting method of the present invention that magnetic pole is installed, solved large-scale magnetic pole handling, stood up; Axially, a radial location difficult problem, magnetic pole is installed one-time-reach-place, rotor inspection, electromechanical testing once pass through, and provide strong technical guarantee for producing large-scale hot rolling motor.
Those of ordinary skill in the art will be appreciated that, above embodiment is used for illustrating the present invention, and be not to be used as limitation of the invention, as long as in connotation scope of the present invention, all will drop in claims scope of the present invention variation, the modification of the above embodiment.
Claims (9)
1. the rotor structure of an AC/AC (alternating current) variable-frequency steel-rolling motor, comprise rotating shaft and several to magnetic pole, described each magnetic pole comprises pole core with pole body and pole shoe, be sleeved on the pole body and be respectively equipped with pole coil and some dress utmost point screw rods that axially is distributed on the pole core bottom surface of magnetic pole liner on the upper and lower end face, it is characterized in that
Described rotating shaft is the three stage structure of setting down, and promptly interlude is a hollow shaft, and its wall thickness forms the yoke of rotor, and all the other are connected two sections solid shaftings that are diameter less than the hollow shaft diameter at hollow shaft two ends;
The pole body end face center of described pole core is offered a through hole vertically and place a pull bar rotationally in this through hole, offers a width coaxially greater than dress utmost point screw diameter and be communicated with the gap slot of described through hole with through hole on the pole body bottom surface of described pole core;
Axially offer in uniform way on the described pull bar with adorn utmost point screw rod quantity consistent and with adorn utmost point screw rod and revolve the screwed hole of joining;
One end of described dress utmost point screw rod spins by gap slot on the magnetic pole pole body bottom surface and the screwed hole on the pull bar;
The other end of described dress utmost point screw rod passes the installing hole on the hollow shaft wall and by the dress utmost point nut magnetic pole is connected on the outer peripheral face of hollow shaft;
The width of described gap slot is greater than 22%～27% of dress utmost point screw diameter, make dress utmost point screw rod in this gap slot can about swing.
2. the rotor structure of AC/AC (alternating current) variable-frequency steel-rolling motor according to claim 1, it is characterized in that, also be provided with four stretching screw holes vertically around through hole on the pole body end face of described pole core and place a stretching screw in each stretching screw hole, two that this stretching screw stretches out the pole body end face axially fastens pole core by tightening nut.
3. the rotor structure of AC/AC (alternating current) variable-frequency steel-rolling motor according to claim 1 is characterized in that, the quantity of described dress utmost point screw rod is that the length of six～eight and visual pole core is determined.
4. the rotor structure of AC/AC (alternating current) variable-frequency steel-rolling motor according to claim 1 is characterized in that, also is provided with the cushion block of bottom surface and hollow shaft surface circular arc coupling between magnetic pole liner on the described pole coil and the hollow shaft surface.
5. the method for installing magnetic poles of the rotor structure of an AC/AC (alternating current) variable-frequency steel-rolling motor as claimed in claim 1 is characterized in that, this method comprises:
Horizontal the resting on the shelf and at rotating shaft one end of rotating shaft installed a Special disc sweep; On pull bar, a guide post is installed respectively, dress utmost point screw rod is installed in all the other screwed holes near in two screwed hole of pole core end; Special cart and be pushed into the installation site of the aligned beneath hollow shaft of hollow shaft on the magnetic pole; Special cart is sling together with magnetic pole, made in the installing hole on guide post and the dress utmost point screw rod insertion hollow shaft wall dress utmost point nut on the pretension dress utmost point screw rod; Inspection magnetic pole liner and cushion block surface should not have the gap, and the part should be less than 0.5mm; Remove the guide post at pull bar two, replace dress utmost point screw rod and pretension dress utmost point nut are installed; By stretching tool stretching dress utmost point screw rod; Be wrenched all dress utmost point nuts by fastened tools, finish the installation of a magnetic pole.
6. method for installing magnetic poles according to claim 5 is characterized in that, described dress utmost point screw rod is brushed with binding agent at the connecting portion with pull bar, and is brushing lubricating oil with the connecting portion of dress utmost point nut.
7. method for installing magnetic poles according to claim 5 is characterized in that, described stretching dress utmost point screw rod is to adopt from the centre to the mode of two alternating tensile three alternating tensiles before and after the every dress utmost point screw rod.
8. method for installing magnetic poles according to claim 5 is characterized in that described stretching tool is the hydraulic tensioning device, and the oil pressure during stretching is 50MPa.
9. method for installing magnetic poles according to claim 5, it is characterized in that, after also being included in the installation of finishing first magnetic pole, drive the jiggering plate by crane and rotate 180 °, repeat above-mentioned installation steps second magnetic pole is installed, make the jiggering plate rotate 90 ° afterwards again, installs second pair of magnetic pole also and the like finish the installation of all magnetic poles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100412383A CN101640457B (en) | 2008-07-31 | 2008-07-31 | Method for installing AC/AC variable-frequency steel-rolling motor rotors and its magnetic poles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100412383A CN101640457B (en) | 2008-07-31 | 2008-07-31 | Method for installing AC/AC variable-frequency steel-rolling motor rotors and its magnetic poles |
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| Publication Number | Publication Date |
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| CN101640457A CN101640457A (en) | 2010-02-03 |
| CN101640457B true CN101640457B (en) | 2011-03-30 |
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| CN2008100412383A Expired - Fee Related CN101640457B (en) | 2008-07-31 | 2008-07-31 | Method for installing AC/AC variable-frequency steel-rolling motor rotors and its magnetic poles |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102195396B (en) * | 2010-03-19 | 2013-04-03 | 上海电气集团上海电机厂有限公司 | Large-scale motor combined type rotation shaft and assembling method thereof |
| CN103236766B (en) * | 2013-04-28 | 2015-07-22 | 国家电网公司 | Magnetic pole center positioning process used in process of assembling and disassembling magnetic pole of generator |
| CN105790517A (en) * | 2014-12-24 | 2016-07-20 | 中国二十冶集团有限公司 | Large-scale annular motor rotor electrode block symmetric assembling method |
| CN105048674A (en) * | 2015-08-14 | 2015-11-11 | 柳州佳力电机股份有限公司 | Magnetic pole fixing structure of large-and-medium-sized motor salient pole rotor |
| CN107979205B (en) * | 2017-12-28 | 2023-07-25 | 无锡道尔奇拜恩电机有限公司 | High-voltage generator rotor coil fixing structure |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101090213A (en) * | 2006-05-27 | 2007-12-19 | 康弗蒂姆有限公司 | Magnet retaining arrangement |
| CN201075800Y (en) * | 2007-08-29 | 2008-06-18 | 上海电气集团上海电机厂有限公司 | Rotor structure of large-scale single phase synchronous generator |
-
2008
- 2008-07-31 CN CN2008100412383A patent/CN101640457B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101090213A (en) * | 2006-05-27 | 2007-12-19 | 康弗蒂姆有限公司 | Magnet retaining arrangement |
| CN201075800Y (en) * | 2007-08-29 | 2008-06-18 | 上海电气集团上海电机厂有限公司 | Rotor structure of large-scale single phase synchronous generator |
Non-Patent Citations (2)
| Title |
|---|
| JP特开平10-150735A 1998.06.02 |
| JP特开平8-88947A 1996.04.02 |
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