CN1182970A - Rotor of squirrel-cage induction motor and making method - Google Patents
Rotor of squirrel-cage induction motor and making method Download PDFInfo
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- CN1182970A CN1182970A CN97122697A CN97122697A CN1182970A CN 1182970 A CN1182970 A CN 1182970A CN 97122697 A CN97122697 A CN 97122697A CN 97122697 A CN97122697 A CN 97122697A CN 1182970 A CN1182970 A CN 1182970A
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- sliver
- end ring
- soldering
- solder
- rotation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/0012—Manufacturing cage rotors
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K33/00—Specially-profiled edge portions of workpieces for making soldering or welding connections; Filling the seams formed thereby
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K15/00—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines
- H02K15/02—Methods or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines of stator or rotor bodies
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K17/00—Asynchronous induction motors; Asynchronous induction generators
- H02K17/02—Asynchronous induction motors
- H02K17/16—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
- H02K17/165—Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors characterised by the squirrel-cage or other short-circuited windings
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Induction Machinery (AREA)
- Manufacture Of Motors, Generators (AREA)
Abstract
To shorten the brazing time, need no technology, and increase the reliability by replaced brazing by forming recessed or projecting sections on an end face of a rotor bar which is in contact with an end ring along the short side of the end face of the rotor bar to bring the rotor bar into line contact with the end ring. SOLUTION: In an end face of each of a plurality of rotor bars installed in a rotor, recessed or projecting sections are formed along the short side of the end face of the rotor bar and therefore the entire surface of the end face has a small corrugated shape. The rotor bar 1 and the end ring 2 are brought into three-line contact with each other.
Description
The present invention relates to carry out joint design and the method for welding thereof that soldering is used for rotation sliver (rotor bar) and end ring (short-circuited conducting sleeve) for the rotor of for example relatively large squirrel-cage motor.
Figure 16 (a) and (b), (c) are illustrated in end view, front view, the vertical view that the spy opens the soldered fitting structure of rotation sliver (rotor bar) in the existing induction electric machine rotor that discloses in the clear 55-40051 communique and end ring (short-circuited conducting sleeve) respectively.Figure 17 illustrates for the rotor with existing soldered fitting structure to use flame square (flame) heating to carry out the outward appearance oblique view of soldering situation.Among the figure, the 1st, rotate sliver (rotor bar), the 2nd, end ring (short-circuited conducting sleeve), the 3rd, the soldering portion after solder 5 flows into, the 4th, the joint clearance of brazing, the 5th, the solder that the operation people manually supplies with, the 6th, below end ring 2, use CO
2The flame square a that the flame of gas etc. heats, the 7th, use CO
2The flame square b that the flame of gas etc. heats the side at the soldering position of rotating sliver 1,8 are provided in a side of the soldering groove of end ring 2 surfaces.
Below, the method for welding of the rotor of existing structure is described.At first apply solder flux (not shown) in advance in the soldering groove of on end ring 2 surfaces, being opened 8.In the conventional example, because solder 5 is with silver solder (BAg-6 or BAg-7), so the solder flux that solder flux also uses silver solder to use.Heat below end ring 2 with flame torch a6.In addition, when the temperature of end ring 2 rises to a certain degree by the time, rotate sliver 1 with flame torch b7 heating.When solder flux reaches operative temperature, rotate sliver 1 and end ring 2 when reaching stage of the above temperature of liquidus curve of solder 5, operation people (not shown) carries out soldering with hand injection solder 5.At this moment, operation people limit is observed at the rotation sliver 1 of heating and the color limit predicted temperature of end ring 2, and this just needs skilled technical ability.Rotate after the sliver 1 through intact 1 of soldering like this, again other rotation sliver 1 of soldering one by one.In addition, when rotating the radical many (for example more than 20) of sliver 1, adopt after intact about 5 to 8 of soldering, just own soldering rotated position 180 degree, forward a side on opposite to, rotate the soldering of sliver 1 again, the way of the thermal stress that takes place during so as to the minimizing soldering.For this reason, in existing method for welding, there is the shortcoming of having elongated the time of finishing soldering.For example, in the rotor of nearly 45 left-right rotation slivers,, whole rotation slivers 1 need about 2 hours for all being soldered on the end ring 2.
In existing method for welding, as described above, there are the shortcomings such as skilled operation that the holding time is long, need the operation people.
In addition, also has such shortcoming, promptly, the size of rotating sliver 1 if rotor strengthens also will increase, be purpose and in the shape that finished edge obliquely amputates like that shown in Figure 16 (a) to form joint clearance of brazing 4, since to rotate the end face of sliver with processing such as lathes, be difficult to the angle θ of groove is processed into less than 1 degree, thus make joint clearance of brazing 4 excessive.
Also have, for overcome existing rely on the operation people in method for welding shortcoming and shorten the holding time, found out along the long limit preseting solder of a side of the rotation sliver end face that contacts with end ring 2, used the method for carrying out overall soldering then from end ring 2 following high-frequency heating.But, as if the soldering of directly carrying out by such existing joint geometry shown in Figure 16 and Figure 18 (c) according to above-mentioned preseting solder, then shown in Figure 18 (a), existence does not cause in the such shortcoming of the brazing defect of central part occurrence of large-area at the even mobility status of end face that rotates sliver 1 because of solder.This is because strong at the little position active force capillaceous in the gap of rotating sliver 1 and end face 2, along with increasing active force capillaceous, the gap reduces, therefore the flow velocity of solder is shown in Figure 18 (b), before the central part that will rotate sliver is inserted solder, the solder of the part that the solder flow velocity is fast travels back across the periphery position of rotating sliver 1, its result forms cavity at central part.
The present invention forms for addressing the above problem a little, and purpose is to reach the holding time weak point, needn't relies on operation people's technical ability, and can utilize preseting solder to obtain the soldered fitting shape and the method for welding of the high squirrel-cage induction motor rotor of reliability.
Squirrel-cage induction motor rotor in the 1st kind of design of the present invention is that the short side direction that rotates the sliver end face in the end face upper edge of the rotation sliver that joins with end ring is offered recess or protuberance, makes the way of contact of rotating sliver and end ring become line and contacts.
Squirrel-cage induction motor rotor in the 2nd kind of design of the present invention be with rotate the end ring face upper edge that sliver joins and circumferentially offer recess or protuberance, make the way of contact of rotating sliver and end ring become line and contact.
Squirrel-cage induction motor rotor in the 3rd kind of design of the present invention is that the line that 1-5 bar line is made in the way of contact of above-mentioned rotation sliver and above-mentioned end ring is contacted.
The rotor of the squirrel-cage induction motor of the 4th kind of design of the present invention is a shape of the section configuration of above-mentioned recess or protuberance being made the mountain font, and the active force capillaceous of the close minor face central portion in two ends that rotates minor face in the sliver end face is increased.
The squirrel-cage induction motor rotor of the 5th kind of design of the present invention is to offer and can hold 1 and rotate sliver and rotating to hold on the side of sliver and be enough to the groove of solder size that the amount of sliver is rotated in 1 of soldering in the position that is provided with of respectively rotating sliver on the end ring face that joins with above-mentioned a plurality of rotation slivers.
The manufacture method of the squirrel-cage induction motor rotor that the 1st kind of method of the present invention is related is in the rotor of the squirrel-cage induction motor that connects many rotation slivers and end ring by soldering, but rotating sliver and rotating the solders that 1 interval that is separated by between the sliver provides the amount of 2 rotations of soldering sliver, and overall soldering is carried out in heating below above-mentioned end ring.
With the manufacture method of the related squirrel-cage induction motor rotor of the 2nd kind of method of the present invention is in the rotor that is connected the many squirrel-cage induction motors that rotate slivers and end ring by soldering, rotate the side that the tabular solder of the amount of sliver is provided to each above-mentioned rotation sliver being enough to 1 of soldering, and overall soldering is carried out in heating below above-mentioned end ring.
Fig. 1 illustrates the cross-section structure that rotates the soldered fitting structure of sliver and end ring in the squirrel-cage induction motor rotor of the invention process form 1.
Fig. 2 is the outward appearance oblique view that the method for soldering rotor in the invention process form 1 is shown.
Fig. 3 is the curve chart that end ring in the invention process form 1 is shown and rotates the temperature measuring result of sliver.
Fig. 4 illustrates that solder related in the invention process form 1 is to the key diagram that rotates the sliver mobility status.
Fig. 5 is that explanation related solder in the invention process form 1 rotates the key diagram of sliver mobility status to other.
Fig. 6 is illustrated in the cross-section structure that rotates the soldered fitting structure of sliver and end ring in the squirrel-cage induction motor rotor of the invention process form 2.
Fig. 7 illustrates that solder related in the invention process form 2 is to the key diagram that rotates the sliver mobility status.
Fig. 8 is the cross-section structure that the soldered fitting structure of rotation sliver in the squirrel-cage induction motor rotor that adopts the invention process form 3 and end ring is shown.
Fig. 9 illustrates that solder related in the invention process form 3 is to the key diagram that rotates the sliver mobility status.
Figure 10 is the cross-section structure that the soldered fitting structure of rotation sliver in the squirrel-cage induction motor rotor that adopts the invention process form 4 and end ring is shown.
Figure 11 is the cross-section structure that the soldered fitting structure of rotation sliver in the squirrel-cage induction motor rotor that adopts the invention process form 5 and end ring is shown.
Figure 12 is the outward appearance oblique view that the method for welding of the squirrel-cage induction motor rotor that adopts the invention process form 6 is shown.
Figure 13 is the outward appearance oblique view that the method for welding of the squirrel-cage induction motor rotor that adopts the invention process form 7 is shown.
Figure 14 is the key diagram of explanation related solder effect in the invention process form 7.
Figure 15 is the plane structure chart that the squirrel-cage induction motor rotor that adopts the invention process form 8 is shown.
Figure 16 illustrates to have soldered fitting structure and the end view of method for welding, front view and the vertical view that rotates sliver and end ring in the rotor of squirrel-cage induction motor now.
Figure 17 is the outward appearance oblique view that the method for welding in the rotor of existing squirrel-cage induction motor is shown.
Figure 18 is that the existing solder of explanation is to the key diagram that rotates the sliver mobility status.
Below, with description of drawings example of the present invention.
Fig. 1 is illustrated in the cross-section structure that rotates the soldered fitting structure of sliver and end ring in the squirrel-cage induction motor rotor of the invention process form 1.Among the figure, 1 is provided in a side of epitrochanterian many rotates sliver, and on the end face that rotates sliver, along recess and protuberance that the short side direction that rotates the sliver end face forms, end face integral body is made the shape of microwaviness.In addition, the height of recess and protuberance (being the maximum height of joint clearance of brazing) d is taken at below the 0.6mm.The 2nd, end ring, the way of contact of rotating sliver 1 and end ring 2 is that the line of 3 lines contacts.The 8th, the soldering groove that on end ring 2 surfaces, is processed into.Soldering groove 8 makes progress so be formed on the whole week of end ring 2 owing to be to process on end ring 2 with lathe etc.The 9th, solder.
If according to this example, then finish the back and form angle welding in the side of rotating sliver 1 along soldering groove 8 in soldering, can be difficult to produce the soldering that stress is concentrated.In addition, owing to rotate the jog that forms the mountain font on the sliver end face, so solder evenly is immersed in rotation sliver and the soldering groove 8 lip-deep joints clearance of brazing.
The method for welding of the rotor of this example 1 below is described.Fig. 2 illustrates to adopt the method for welding of example 1 to use from rotor being carried out the outward appearance oblique view of high-frequency heating below end ring.Explanation every and conventional example (Figure 17) same parts is omitted.Among the figure, the 9th, the solder amount that presets in each side of rotating sliver 1 is to be enough to 1 solder that rotates the amount of sliver of soldering.Use root pole (φ 7mm) shape solder in the present embodiment.The 10th, be used to carry out the heater coil of high-frequency heating, the 11st, be used for the insulation board that insulate between end ring 2 and the heater coil 10, the 12nd, be used for detecting the infrared ray sensor of the temperature of representational rotation sliver 1.
At first, be arranged on end ring 2 on the heater coil 10 and make and accompany insulation board 11 between them.Then, apply solder flux being located on the end ring 2 lip-deep soldering grooves 8.And, be arranged on the rotation sliver 1 of having assembled (not shown) such as laminated core, rotation axiss on the end ring 2 after, on preseting solder 9, also apply solder flux, and rotate long limit supply of a side of sliver end face along each.At last, infrared ray sensor 12 is aimed at the set point of temperature detection position of rotating sliver 1, finish to prepare.In the present embodiment, use external diameter to be 500mm, internal diameter is 340mm, and thickness is the end ring of 25mm, uses 46 butt face length limits to be 50mm, and minor face is the rotation sliver of 20mm.By below end ring 2, heat the beginning soldering with high frequency coil 10.In this example, the high frequency electric source with 150kw heats with 13kHz.Thus, the part for the 0.2mm degree of depth below end ring 2 heats.
Fig. 3 illustrates the end ring 2 of this example and rotates the temperature measuring result of sliver 1.Transverse axis is the time, and the longitudinal axis is a temperature, and solid line illustrates the temperature of end ring 2, is shown in dotted line the temperature of rotating sliver 1.As shown in Figure 3, at initial 3 minutes, only the temperature of end ring 2 rose.This is because with the line contact end face 2 and rotation sliver 1 are contacted, so the contact heat resistance height.Then, preseting solder 9 fusings when end ring 2 reaches the liquidus temperature (about 700 ℃) of solder, sliver 1 is rotated in solder 9 contacts, sharply conducts heat, and the temperature of rotating sliver 1 begins to rise.But, owing to insert thermocouple from the top position of the end face 10mm that rotates sliver 1, so the thermometric position is lower than the soldering portion temperature of reality among Fig. 3.The liquidus temperature that sliver 1 reaches solder is rotated in about 1 minute of preseting solder 9 fusing backs, and the solder 9 that has melted is immersed in the joint clearance of brazing, and then also forms projection in rotation sliver side.Obtain the soldering portion temperature of rotating sliver and the temperature difference of thermometric portion temperature in advance, (liquidus temperature of solder+20 ℃) stop high-frequency heating when infrared ray transducer 12 detects the soldering portion temperature of rotating sliver 1 and reaches set point of temperature, cool off.If image pattern 3 like that suitably designs heater coil 10, then almost there is not Temperature Distribution on the end ring 2, can heat equably.Therefore, the thermal stress that takes place during soldering since when cooling end ring evenly shrink, so become and rotation sliver 1 corresponding residual stress, compare with existing manual soldering, the uniform residual stress of formation, its maximum is also very little.
In addition, existing is to heat end ring 2 simultaneously and rotate sliver 1, and this example is owing to only heat end ring 2, and then change the line contact into to rotating sliver 1 and contacting of end ring 2, improved contact heat resistance, therefore when from end ring 2 below, heating, the heat that is pressed into laminated core (not shown) absorption of rotating in the sliver 1 is few, can be by end ring 2 accumulation of heats, so, also can carry out overall soldering at short notice even the capacity of high frequency electric source is not increased to more than the aequum.
Thereby, owing to rotate weak point heating time of sliver 1, not producing annealing, thereby reduced the intensity decreases degree of rotating sliver 1 so rotate sliver 1, the holding time is compared with existing manual soldering certainly also with regard to much shorter (comprising to about 15 minutes of cooling).In addition, also do not need skilled technical ability.
Then, utilize Fig. 4 to explain orally the mobility status of solder in the method for welding of example 1.In this example, compare with existing soldered fitting and to have reduced maximum joint clearance of brazing d (existing greater than among 0.8mm-the present invention less than 0.6mm) and make the flow velocity of solder not produce bigger difference, simultaneously, the section configuration of recess or protuberance is taken as symmetrical mountain font, the capillary force of the close minor face central portion in two ends that rotates minor face in the sliver end face is increased, make the middle body that the velocity flow profile of solder also becomes at rotation sliver 1 shown in Fig. 4 (b) not be slower than peripheral part.Brazing defect if the soldering of using preseting solder then as Fig. 4 (a) shown in, is almost evenly immersed solder in the joint clearance of brazing, does not take place in its result on rotation sliver end face.
Also have, in above-mentioned example, form symmetrical mountain font recess and protuberance at rotation sliver end face, but also can form zigzag recess and protuberance such shown in Fig. 5 (c).In this case, the velocity flow profile of solder is shown in Fig. 5 (b), fast in an end of rotating the sliver end face, in addition because recess and protuberance are that the left and right sides is asymmetric, so the size of capillary force slightly descends, the incidence of brazing defect also slightly worsens, but the rotation sliver is identical with above-mentioned example with end ring, owing to be the line contact, has the effect that shortens the holding time.
Also have, use high-frequency heating that end ring is heated in the above-mentioned example and carry out overall soldering, but also can use flame torch and heating furnace to heat.
Fig. 6 illustrates the cross-section structure that rotates the soldered fitting structure of sliver and end ring in the squirrel-cage induction motor rotor of the invention process form 2.Among the figure, 1 is provided in a side of epitrochanterian many rotates sliver, and the end face that rotates sliver is made the protuberance of mountain font along the short side direction that rotates the sliver end face.The 2nd, end ring, rotating sliver 1 is the line contact of 1 line with contacting of end ring 2.In addition, the height of protuberance is that the maximum height d of joint clearance of brazing is taken as less than 0.6mm.The 8th, the soldering groove that becomes in the Surface Machining of end ring 2.Soldering groove 8 is because with processing on end ring 2 such as lathes, so be upwards to form in the whole week of end ring 2.The 9th, if solder according to this example, then finishes the back in soldering and is rotating sliver 1 side formation angle welding, and solder also evenly is immersed in the joint clearance of brazing of rotating sliver 1 and soldering groove 8 surfaces.
Then, utilize Fig. 7 to explain orally the mobility status of the solder in the method for welding of this example 2.Compare with existing soldered fitting in this example 2 and reduced maximum joint clearance of brazing d (existing greater than among 0.8mm-the present invention less than 0.6mm) and make and do not producing big difference aspect the flow velocity of solder, adopt simultaneously soldered fitting by the protuberance design of making symmetrical mountain font make as Fig. 7 (b) shown in the velocity flow profile of solder like that at the middle body of rotation sliver 1 for the fastest.Its result is if use the soldering of preseting solder then at the middle body that rotates sliver 1 brazing defect not to take place like that shown in Fig. 7 (a).And then, contact with the line that contacting of end ring 2 changes 1 line into rotating sliver 1, more improved contact heat resistance, therefore when heating below end ring 2, be pressed into the laminated core (not shown) of rotating in the sliver 1 and absorb heat hardly, make accumulation of heat in end ring 2.The advantageous particularly during end ring of this joint geometry and the big thermal capacity of soldering little at the capacity of high frequency electric source.Thus, can finish the few overall soldering of defective at short notice.
Fig. 8 is the cross-section structure that the soldered fitting structure of rotation sliver in the squirrel-cage inductor motor rotor of the invention process form 3 and end ring is shown.Among the figure, 1 is provided in a side of epitrochanterian many bars rotationally.On the end face that rotates sliver, form recess and protuberance along the short side direction that rotates in the sliver end face, end face integral body is made the microwaviness shape.In addition, the height of recess and protuberance is that the maximum height d of joint clearance of brazing is taken at less than 0.6mm.The 2nd, end ring, the way of contact of rotating sliver 1 and end ring 2 is that 5 lines contact.The 8th, the soldering groove that on end ring 2 surfaces, is processed into.Owing to be with processing on end ring 2 such as lathes, soldering groove 8 is upwards to form in the whole week of end ring 2.The 9th, solder.
If according to this example, then finish the back and rely on soldering groove 8 to form angle welding, thereby can be difficult to produce the soldering that stress is concentrated in rotation sliver 1 side in soldering.In addition, owing to forming the jog of mountain font on the end face of rotation sliver 1, therefore, solder evenly is immersed in the joint clearance of brazing of rotating between sliver end face and soldering groove 8 surfaces.
Below utilize Fig. 9 to explain orally the mobility status of solder in the method for welding of example 3.In this example, compare with existing soldered fitting, except having reduced maximum joint clearance of brazing d (existing greater than among 0.8mm-the present invention less than 0.6mm), thereby the velocity flow profile that makes solder shown in Fig. 9 (b), sliver 1 central portion is not slow yet rotating.Form the recess and the protuberance of a plurality of mountains font simultaneously, and the direction of recess and protuberance is taken at the short side direction that rotates in the sliver end face, consequently:, then shown in Fig. 9 (a), on rotation sliver end face, brazing defect does not take place if use the soldering of preseting solder.
And then, though rotate the way of contact of sliver 1 and end ring 2 is to make many lines to contact (being 5 line contacts in this example), has improved contact heat resistance, compares with example 1 and 2, set lowlyer (being 3 line contacts in the example 1, is 1 line contact in the example 2).That is, when heating below end ring 2, be pressed into the laminated core (not shown) of rotating sliver 1 and absorb few heat, feasible mainly accumulation of heat in end ring 2 is compared with example 1 and 2 simultaneously, also can heat rotating sliver 1.When this joint geometry particularly has big surplus at the capacity of high frequency electric source, it is favourable that the end ring that adds the quite little thermal capacity of thermal capacity is carried out soldering.Thus, can finish the few overall soldering of defective at short notice.
Figure 10 is the cross-section structure that the soldered fitting structure of rotation sliver in the squirrel-cage induction motor rotor of the invention process form 4 and end ring is shown.Among the figure, 1 is provided in a side of epitrochanterian many rotates sliver, the 2nd, end ring, the 8th, the soldering groove that processes on end ring 2 surfaces.Soldering groove 8 is owing to be with processing on end ring 2 such as lathes, thus soldering groove 8 totally become the mountain font.That is, along the circumferential direction offer protuberance with rotating on the end ring face that sliver 1 joins, 1 line is made in the above-mentioned rotation sliver and the way of contact between above-mentioned end ring contacted.The 9th, if solder according to this example, is then rotating sliver 1 side formation angle welding after soldering is finished, and solder also evenly is immersed in the joint clearance of brazing of rotating between sliver 1 and soldering groove 8 surfaces.
Below explain orally the mobility status of the solder in the method for welding of example 4.In this example, because what only be the shape of rotating the shape of sliver and end ring with example 2 is opposite, therefore, the mobility status of basic solder and the laminated core (not shown) that is pressed in the rotation sliver 1 absorb heat hardly, thereby make the accumulation of heat effect of ring 2 identical with example 2.Its result, identical with example 2, the capacity of high frequency electric source is little, when the end ring to big thermal capacity carries out soldering, can finish the few overall soldering of defective at short notice.
Figure 11 is the cross-section structure that the soldered fitting structure of rotation sliver in the squirrel-cage induction motor rotor of the invention process form 5 and end ring is shown.Among the figure, 1 is provided in a side of epitrochanterian many rotates sliver, the 2nd, end ring, the 8th, the soldering groove that is processed on the surface of end ring 2.Soldering groove 8 usefulness lathes etc. are processed on the surface of end ring 2, carry out the concavo-convex processing of a plurality of mountains font in addition again, the shape of totally making microwaviness of soldering groove.The 9th, if solder according to this example, then after soldering finishes, forms angle welding in the side of rotating sliver 1, and solder also evenly is immersed in the joint clearance of brazing of rotating between sliver 1 and soldering groove 8 surfaces.
Then, the mobility status of the solder in the method for welding of explanation example 5.In this example, owing to only be that to rotate the shape of the shape of sliver and end ring opposite with example 1, therefore, the setting of the mobility status of basic solder and the rotation sliver 1 and the contact heat resistance of end ring 2 is identical with example 1, its result is identical with example 1, and this joint geometry has big surplus at the capacity of high frequency electric source, and soldering with add thermal capacity and compare, the soldering capacity of end ring is little, can finish the few overall soldering of defective at short notice.
Figure 12 is the outward appearance oblique view of method for welding that the squirrel-cage induction motor rotor of the invention process form 6 is shown.Among the figure, the every part identical with Fig. 2 explanation is omitted.Among the figure, the 13rd, supply to the preseting solder that rotates between sliver and the rotation sliver, be to be enough to 2 solders that rotate the amount of sliver of soldering.Use the solder of 4 poles (φ 7mm) shape in this example.In addition, as shown in figure 12, the interval that whenever is separated by between rotation sliver and rotation sliver provides preseting solder 13, thereby alternately forms rotation sliver interval that is equipped with preseting solder 13 and the interval that the rotation sliver of preseting solder 13 is not provided.
At first, be arranged on end ring 2 on the heater coil 10 and make and accompany insulation board 11 between the two.Then, be located at coating solder flux 14 on the end ring 2 lip-deep soldering grooves 8.And, after the rotation sliver of having assembled laminated core material, rotating shaft pipe (not shown among this figure) is arranged on the end ring 2, on preseting solder 13, also apply solder flux 14, and rotating sliver and rotate between the sliver and supply with solder every an interval.
By below end ring 2, heat the beginning soldering with high frequency coil 10.If according to this example, then because the inflow direction of solder only comes a side of autorotation sliver 1, so, also do not produce the undesirable condition of cavity one class even the spacing of 1 of a plurality of rotation sliver is narrow.Promptly, in this example, because solder is reliably from rotating a side flow situation of sliver 1, and, rotating the jog that processes on the sliver end face with the mountain font shown in the example 1-5, setting to such an extent that make the capillary force that rotates sliver 1 central part greater than the capillary force at position on every side, so at first flow through solder at rotation sliver 1 central part, discharge the air in the part of joint clearance of brazing, so be difficult to produce brazing defect.
Figure 13 is the outward appearance oblique view of method for welding that the squirrel-cage induction motor rotor of the invention process form 7 is shown.At this, the every part identical with Fig. 2 explanation is omitted.Among the figure, the 15th, the tabular preseting solder that provides to a side of each rotation sliver 1, in this example, the solder of making rectangular cross sectional shape (length is identical with pole) of the sectional area 13mm * 6mm much at one of use and 2 poles (φ 7mm).
Carry out soldering by using high frequency coil 10 below end ring 2, to heat.By the presetting in the candle material 9 of the design of 2 poles shown in Figure 14 (a), be that line contact as the end ring 2 and the preseting solder 9 of thermal source, sometimes, because that solder flux 14 applies is inhomogeneous etc., contact heat resistance has difference between solder.For this reason, the time limit of solder fusing is probably variant.If the time existence of solder fusing is disperseed deviation, then the temperature of the rotation sliver of solder 9 contacts of fusing at first rises, and when the solder of this rotation sliver that does not rise to predetermined temperature has nearby melted subsequently, to the phenomenon that this solder flows to rotation sliver one side that temperature risen take place, very likely cause the situation of solder deficiency on the rotation sliver of the part in solder fusing evening in time limit.If according to the present invention, because preseting solder is a tabular shown in Figure 14 (b) like that, so end ring 2 is that face contacts with preseting solder 9, compare with round bar shape, therefore contact heat resistance is even, and the solder fusing time limit does not have difference when overall soldering, so can carry out the few soldering of defective.
In addition, in this example, used the solder of the cross sectional shape of making 13mm (width) * 6mm (length), and rotating spacing between sliver when narrow, cross sectional shape can be done the cross sectional shape of quadrate or 6mm (width) * 13mm (length), so be not the numerical value that is defined in this example.
Figure 15 is the plane structure chart of rotor that the squirrel-cage induction motor of the invention process shape 8 is shown, and this is to cut the figure that rotates sliver and watch end ring 2 from above open from the centre.Among the figure, the 16th, end ring has formed the oval soldering groove 17,18th of taking in this size of rotating sliver 1 and preseting solder 18 above, can 1 of soldering rotates the preseting solder of the amount that sliver uses.Use the solder of 1 round bar shape (φ 7mm) in this example as preseting solder 18, also can be with plate shaped.The formation such as punch forming processing that soldering groove 17 usefulness milling cutters and multiple operation automatic numerical control lathe or punch press carry out.
The method for welding of this example below is described.On the oval soldering groove of offering on end ring 16 surfaces 17, apply solder flux (not shown) in advance.Then, in the oval soldering groove 17 that the rotation sliver 1 of having assembled laminated iron core, rotating shaft etc. is arranged on end ring 16 after, on preseting solder 18, also apply solder flux and supply to a side of the rotation sliver 1 in the oval soldering groove 17.Then, identical with above-mentioned example, below end ring 2, heat the beginning soldering by using high frequency coil.
If according to this example, because rotating sliver, each independently soldering is all arranged with oval groove 17, so no matter be to rotate the narrow rotor of the spacing of 1 of sliver or the time limit of solder fusing in overall soldering, in each solder under the differentiated situation, one side of the rotation sliver that temperature raises earlier can not flow into the solder that supplies in the adjacent rotation sliver, compiles the phenomenon of the solder deficiency that causes so can prevent solder place that the solder that melted afterwards flows to initial fusing fully.
In addition, though in the present embodiment soldering groove 17 is done ovalisation, square or other shape also have effect same.
As previously discussed, if according to the 1st kind of design of the present invention, then owing on the end face of the rotation sliver that joins with end ring, offer along the recess or the protuberance of the short side direction that rotates the sliver end face, make the way of contact of rotating sliver and end ring become line and contact, therefore can finish the few overall soldering of defective at short notice.And then, because heating time is short, so can prevent to rotate the intensity decreases of sliver.In addition, also do not need skilled technical ability.
If according to the 2nd kind of design of the present invention, then since with the face that rotates the end ring that sliver joins on along the circumferential direction offer recess or protuberance, make and rotate contacting of sliver and end ring and become the line contact, therefore have and the 1st kind of effect that design is identical.In addition, owing to be not the processing of on the rotation sliver end face of each rotation sliver, doing for the formation joint clearance of brazing, but be to form overall joint clearance of brazing to carry out on the end ring face, so can cut down process time.
If according to the 3rd kind of design of the present invention, then contact owing to making the way of contact of rotating sliver and end ring become 1-5 bar line, therefore need not heat the rotation sliver and just can efficiently heat end ring and solder, can finish the few overall soldering of defective at short notice.
If according to the 4th kind of design of the present invention, then because the section configuration of recess or protuberance is made the mountain font, make the two ends of rotating the minor face in the sliver end face close, the central portion of minor face, capillary force increases, therefore solder almost evenly immerses the joint clearance of brazing, is difficult on rotation sliver end face brazing defect take place.In addition, by cutting down brazing defect, can prevent the intensity decreases at soldering position.
If according to the 5th kind of design of the present invention, then since with many rotate the position that is provided with of respectively rotating sliver on the end ring face that slivers join and offer and can take in 1 and rotate sliver and put into and be enough to the groove of solder size that the amount of sliver is rotated in 1 of soldering at the place, a side that rotates sliver.Therefore,, can prevent that the solder place that the solder that melted afterwards flows to initial fusing from compiling when in the overall soldering during solder when fusing existence difference, thus the phenomenon of the solder deficiency that causes.
If according to the 1st kind of manufacture method of the present invention, then in the rotor of the squirrel-cage induction motor that connects a plurality of rotation slivers and end ring with soldering, owing to be to be separated by between the sliver one that supply with at interval can 2 solders that rotate the sliver amount of soldering rotating sliver and rotate, and overall soldering is carried out in heating below above-mentioned end ring, even therefore the spacing of rotating between the sliver is narrow, solder also can flow into from a side of rotating sliver reliably, so can reduce brazing defect, can prevent to rotate the intensity decreases of sliver.
If according to the 2nd kind of manufacture method of the present invention, then in the rotor of the squirrel-cage induction motor that connects a plurality of rotation slivers and end ring with soldering, because offering an above-mentioned side of respectively rotating sliver by 1 plate shaped solder that rotates the sliver amount of soldering, and overall soldering is carried out in heating below above-mentioned end ring, therefore, the contact heat resistance of the solder quite solder of round bar shape is even, so can finish the few soldering of defective.
Claims (7)
1. a squirrel-cage induction motor rotor comprises a plurality of rotation slivers and the end ring that connect with soldering, it is characterized in that:
On the end face of the rotation sliver that joins with above-mentioned end ring, offer recess or protuberance, make the way of contact of above-mentioned rotation sliver and above-mentioned end ring form line and contact along the short side direction of above-mentioned rotation sliver end face.
2. squirrel-cage induction motor rotor, comprise a plurality of rotation slivers and the end ring that connect with soldering, it is characterized in that: circumferentially offer recess or protuberance in the end ring face upper edge that joins with above-mentioned rotation sliver, make the way of contact of above-mentioned rotation sliver and above-mentioned end ring form line and contact.
3. the rotor of the squirrel-cage induction motor described in the claim 1 or 2 is characterized in that:
The line that the mode of rotating sliver and end ring is formed 1-5 bar line contacts.
4. the rotor of the squirrel-cage induction motor described in the claim 1 or 2 is characterized in that:
The section configuration of recess or protuberance is made the mountain font, the capillary force of the close minor face central portion in two ends that rotates minor face in the sliver end face is increased.
5. the squirrel-cage induction motor rotor described in each of claim 1 to 4 is characterized in that:
On the end ring face that joins with a plurality of rotation slivers, respectively rotate being provided with on the position of sliver, offer and to take in 1 and rotate sliver and at the groove of solder size that the amount of sliver is rotated in 1 of soldering that is enough to of a side of rotating sliver.
6. the manufacture method of a squirrel-cage induction motor rotor is characterized in that:
In the rotor of the squirrel-cage induction motor that connects a plurality of rotation slivers and end ring with soldering, rotating sliver and rotating to be separated by between the sliver one and supply with the solders of the amount that is enough to 2 rotations of soldering sliver at interval, overall soldering is carried out in heating below above-mentioned end ring.
7. the manufacture method of a squirrel-cage induction motor rotor is characterized in that:
In the rotor of the squirrel-cage induction motor that connects a plurality of rotation slivers and end ring with soldering, supply to an above-mentioned side of respectively rotating sliver being enough to 1 plate shaped solder that rotates the quantity of sliver of soldering, overall soldering is carried out in heating below above-mentioned end ring.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP304827/96 | 1996-11-15 | ||
| JP304827/1996 | 1996-11-15 | ||
| JP30482796A JP3180691B2 (en) | 1996-11-15 | 1996-11-15 | Rotor of cage-type induction motor and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1182970A true CN1182970A (en) | 1998-05-27 |
| CN1109396C CN1109396C (en) | 2003-05-21 |
Family
ID=17937740
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97122697A Expired - Lifetime CN1109396C (en) | 1996-11-15 | 1997-11-13 | Rotor of squirrel-cage induction motor and making method |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP3180691B2 (en) |
| KR (1) | KR100325910B1 (en) |
| CN (1) | CN1109396C (en) |
| PT (1) | PT102078B (en) |
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| CN101557145B (en) * | 2008-04-11 | 2010-12-22 | 上海电气集团上海电机厂有限公司 | Soldering method of conducting ring of motor rotor |
| CN102593993A (en) * | 2012-02-29 | 2012-07-18 | 北京中瑞蓝科电动汽车技术有限公司 | Electromotor and control method of electromotor |
| CN102922074A (en) * | 2012-11-26 | 2013-02-13 | 湘潭电机股份有限公司 | Vacuum welding method of motor rotor |
| CN103008902A (en) * | 2011-09-27 | 2013-04-03 | 三星泰科威株式会社 | Joining structure of rotation part of rotary machine and method of joining rotation part of rotary machine |
| CN103401389A (en) * | 2013-07-31 | 2013-11-20 | 江苏经纬轨道交通设备有限公司 | Brazing structure for motor rotor |
| CN103697942A (en) * | 2013-12-23 | 2014-04-02 | 南车成都机车车辆有限公司 | Method for verifying cage rotor induction brazing technique |
| CN103722266A (en) * | 2013-12-31 | 2014-04-16 | 南车成都机车车辆有限公司 | Rotor welding technology |
| CN103722269A (en) * | 2013-12-31 | 2014-04-16 | 攀钢集团工程技术有限公司 | Method for welding rotor cage strips and cage rings |
| CN104249203A (en) * | 2013-06-26 | 2014-12-31 | 上海电气集团上海电机厂有限公司 | Motor rotor end ring and guide bar brazing method |
| CN107127452A (en) * | 2017-06-27 | 2017-09-05 | 东莞市纳百川电子科技有限公司 | A kind of metal welding procedure |
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| KR100476587B1 (en) * | 1999-10-11 | 2005-03-17 | 현대중공업 주식회사 | Brazing method of Cu bar type induction motor |
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| JP2019009908A (en) * | 2017-06-26 | 2019-01-17 | 東芝三菱電機産業システム株式会社 | Squirrel-cage induction rotary electric machine and short-circuit ring support method |
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Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5540051A (en) * | 1978-09-12 | 1980-03-21 | Mitsubishi Electric Corp | T-joint and production thereof |
| US5283941A (en) * | 1992-07-21 | 1994-02-08 | General Electric Company | Method for brazing rotor bars to end rings of a rotor for an asynchronous AC motor |
| JPH06197504A (en) * | 1992-12-22 | 1994-07-15 | Toshiba Corp | Rotating electric machine |
-
1996
- 1996-11-15 JP JP30482796A patent/JP3180691B2/en not_active Expired - Lifetime
-
1997
- 1997-11-11 KR KR1019970059130A patent/KR100325910B1/en not_active IP Right Cessation
- 1997-11-12 PT PT102078A patent/PT102078B/en active IP Right Grant
- 1997-11-13 CN CN97122697A patent/CN1109396C/en not_active Expired - Lifetime
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| CN101557145B (en) * | 2008-04-11 | 2010-12-22 | 上海电气集团上海电机厂有限公司 | Soldering method of conducting ring of motor rotor |
| CN103008902A (en) * | 2011-09-27 | 2013-04-03 | 三星泰科威株式会社 | Joining structure of rotation part of rotary machine and method of joining rotation part of rotary machine |
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| CN102922074B (en) * | 2012-11-26 | 2015-01-07 | 湘潭电机股份有限公司 | Vacuum welding method of motor rotor |
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| CN103697942B (en) * | 2013-12-23 | 2015-12-02 | 南车成都机车车辆有限公司 | Cage rotor induction brazing technique test method |
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| CN103722269B (en) * | 2013-12-31 | 2016-02-10 | 攀钢集团工程技术有限公司 | The welding method of rotor cage bar and short-circuited conducting sleeve |
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Also Published As
| Publication number | Publication date |
|---|---|
| PT102078B (en) | 2000-09-29 |
| KR19980042261A (en) | 1998-08-17 |
| KR100325910B1 (en) | 2002-07-02 |
| PT102078A (en) | 1998-06-30 |
| JPH10150750A (en) | 1998-06-02 |
| JP3180691B2 (en) | 2001-06-25 |
| CN1109396C (en) | 2003-05-21 |
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