CN104410184B - A kind of Novel motor rotor - Google Patents
A kind of Novel motor rotor Download PDFInfo
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- CN104410184B CN104410184B CN201410664302.9A CN201410664302A CN104410184B CN 104410184 B CN104410184 B CN 104410184B CN 201410664302 A CN201410664302 A CN 201410664302A CN 104410184 B CN104410184 B CN 104410184B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/24—Rotor cores with salient poles ; Variable reluctance rotors
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1222—Hot rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1216—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the working step(s) being of interest
- C21D8/1233—Cold rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D8/00—Modifying the physical properties by deformation combined with, or followed by, heat treatment
- C21D8/12—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties
- C21D8/1244—Modifying the physical properties by deformation combined with, or followed by, heat treatment during manufacturing of articles with special electromagnetic properties the heat treatment(s) being of interest
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/02—Ferrous alloys, e.g. steel alloys containing silicon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/60—Ferrous alloys, e.g. steel alloys containing lead, selenium, tellurium, or antimony, or more than 0.04% by weight of sulfur
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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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Electromagnetism (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Power Engineering (AREA)
- Manufacture Of Motors, Generators (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The present invention relates to a kind of Novel motor rotor, belong to rotor technology field.What comprise that rotating shaft and multi-disc rotor punching be formed by stacking turns, axis hole is offered in the middle part of described rotor punching, described rotor punching evenly offers multiple first arc notch around axis hole madial wall, rotating shaft lateral wall is provided with and is multiplely positioned at the arc convex portion of the first arc notch with the first arc notch one_to_one corresponding, described rotor punching offers multiple every hole around its periphery, each be formed respectively every both sides, hole multiple with the first arc notch one_to_one corresponding and the balancing patch separated, the center line of described balancing patch overlaps with the center line of arc notch, balancing patch front end bilateral symmetry is provided with fin, the opening communicated with every hole is formed between adjacent two fins, the material of described rotor punching is silicon steel.This rotor weight is less, and rotor turns is more flexible, and rotor punching is made up of silicon steel, excellent performance, and iron loss is little, and the operating efficiency of motor is higher, long service life.
Description
Technical field
The invention belongs to rotor technology field, relate to a kind of Novel motor rotor.
Background technology
Rotor is also the rotating parts in motor.Motor is made up of rotor and stator two parts, and it is used to the conversion equipment realizing electric energy and mechanical energy and mechanical energy and electric energy.Rotor is divided into motor rotor and generator amature.
Such as, application number be 201210548364.4 patent of invention disclose a kind of stator, rotor structures of asynchronous motor, it comprises, comprise stator punching body and rotor punching body, described stator punching body ringwise, several stator slots of circumferencial direction punching in the inner edge of stator punching body equably along stator punching body, the center line of described stator slot all points to the center of stator punching body, and the opening of described stator slot is positioned at the inner edge of stator punching body, described rotor punching body ringwise, and the external diameter of rotor punching body is less than the internal diameter of stator punching body, equably rotor is set along the circumferencial direction of rotor punching body in the outer rim of rotor punching body, the center line of described rotor all points to the center of rotor punching body, the opening of described rotor is positioned at the outer rim of rotor punching body, the quantity of described rotor is less than the quantity of stator slot, although this electronics rotor can improve electric efficiency, but also there is following problem in its structure, 1, axis hole madial wall offers compensating groove, rotating shaft is correspondingly provided with protruding location division, although lug boss embeds in compensating groove and can prevent from relatively rotating between rotating shaft and rotor punching body, but, because compensating groove is square, under the long-term opposing force of rotating shaft and rotor punching body, easily rupture in this location division, rotating shaft and rotor punching body is caused to locate, 2, this rotor punching body volume is comparatively large, and weight is also large, and cause whole motor speed to be affected, operating efficiency is lower.
In sum, in order to solve the technical problem that above-mentioned rotor exists, need to design a kind of rotating shaft with turn conveniently locate, the better and electronics rotor of turning lighter of locating effect.
Summary of the invention
The object of the invention is the problems referred to above existed for prior art, propose a kind of rotating shaft with turn convenient locate, the better and electronics rotor of turning lighter of locating effect.
Object of the present invention realizes by following technical proposal: a kind of Novel motor rotor, what comprise that rotating shaft and multi-disc rotor punching be formed by stacking turns, axis hole is offered in the middle part of described rotor punching, described rotor punching evenly offers multiple first arc notch around axis hole madial wall, rotating shaft lateral wall is provided with and is multiplely positioned at the arc convex portion of the first arc notch with the first arc notch one_to_one corresponding, described rotor punching offers multiple every hole around its periphery, each be formed respectively every both sides, hole multiple with the first arc notch one_to_one corresponding and the balancing patch separated, the center line of described balancing patch overlaps with the center line of arc notch, balancing patch front end bilateral symmetry is provided with fin, the opening communicated with every hole is formed between adjacent two fins, the material of described rotor punching is silicon steel, described silicon steel is grouped into by the one-tenth of following percentage by weight: C:0.005-0.008%, Si:0.5-3.0%, Mn:0.5-0.8%, Al:0.3-0.8%, P≤0.015%, S≤0.01%, Ni:0.005-0.01%, Sb:0.002-0.01%, Se:0.005-0.015%, surplus is Fe and inevitable impurity.
In rotor punching silicon steel, the form that carbon content and carbon exist all can affect the performance of silicon steel, as cementite is little compared with intra-die on silicon-steel magnetic impact, but rotor punching silicon steel plasticity can be made significantly to degenerate.Find through great many of experiments, the present invention C contained containing 0.05-0.08% in the rotor punching silicon steel material of 0.5-3.0%Si can ensure the performance of rotor punching.
Silicon steel rotor punching of the present invention makes even tissue, grain coarsening through annealing, is mingled with gathering.Silicon can reduce crystalline anisotropy, and make magnetization easy, magnetic resistance reduces, and can also alleviate the harm of other impurity in silicon steel, make carbon graphite, reduce the adverse effect to magnetic.Silicon and oxygen have strong affinity, play deoxidation.But excessive silicon can make steel become fragile, easily there is implosion when steel band cooling and heating.And along with the increase simply of silicone content in silicon steel rotor punching, the hardness of rotor punching also increases, oxidizablely to get rusty, form oxide-film on its surface, result causes the mould of rotor punching easily to damage.Therefore, in silicon steel rotor punching of the present invention, the content of silicon is defined generally between 0.5-3.0%.
And manganese prevents hot-short indispensable element in silicon steel rotor punching of the present invention, its content controls at 0.5-0.8%, can improve the solubility of carbon in iron, carburet becomes cementite, but the excessive meeting of Fe content makes texture degenerate, form unwanted sediment MnS, affect magnetic.
Effect and the silicon of aluminium are close, the ratio resistance of silicon steel rotor punching can be improved, reduce iron loss, silicon oxygen content in steel can also be reduced, reduce magnetic aging phenomenon, and aluminium is the composition needed for cold rolled silicon steel deoxidation, but excessive aluminium can affect large strip aluminium compound precipitated phase formation on crystal boundary can hinder grain coarsening.Therefore, in silicon steel rotor punching, aluminium content is controlled at 0.3-0.8%.
In silicon steel rotor punching of the present invention, add 0.002-0.01%Sb and Si, Al mating reaction, can promote that the favourable texture component of magnetism of material was formed before recrystallization, obviously reduce iron loss.
Although phosphorus is a kind of interfacial activity element impurity, segregation can cause serious crystal boundary catalysis in crystal boundary, can be used for improving the punching of rotor punching.And sulphur is to the detrimental of silicon steel rotor punching, its content should be reduced as far as possible.The present invention, by constantly testing discovery, adds the content that rare earth element Se effectively can control S in silicon steel, adds the corrosion resistance that 0.005-0.01%Ni can improve silicon steel rotor punching, prevent from getting rusty in above-mentioned silicon steel rotor punching material.
In above-mentioned a kind of Novel motor rotor, the preparation method of described rotor punching comprises the steps:
S1, take raw material according to the composition of above-mentioned silicon steel and weight fraction thereof, and smelt;
S2, the silicon steel after smelting successively is carried out continuous casting working procedure and hot-rolled process; In continuous casting working procedure, temperature is 800-1000 DEG C;
S3, the hot rolled coil after hot rolling process is carried out covering insulation, acid pickling and rust removing process;
S4, the silicon steel coil after above-mentioned process is carried out once cold rolling operation, the steel band after cold rolling is carried out degreasing or surface degreasing, and loose winding is to reduce tension force;
S5, under hydrogen shield, silicon strip after cold rolling is heated to 1020-1120 DEG C, and carries out annealing in process under the tension force σ of 0.8-1.2MPa, annealing temperature retention time is 10-50min, then be cooled to 650-680 DEG C with the cooling rate of 8-12 DEG C/s, then naturally cool;
S6, above-mentioned cooled silicon strip is struck out rotor punching blank, obtain rotor punching finished product through reprocessing.
In the preparation method of rotor punching of the present invention, the too low growth being unfavorable for crystal grain of the temperature in annealing; Annealing temperature is too high, is unfavorable for reducing costs, Simplified flowsheet.And when annealing, tension force σ is too small is unfavorable for that crystal grain is grown up rapidly under low-temperature short-time annealing; When tension force σ is excessive, crystal grain, rolling to comparatively large with performance difference transversely, is unfavorable for the anisotropy of iron loss reducing non-orientation silicon steel.In addition, consider the quality stability reducing manufacturing cost and be conducive to rotor punching silicon steel product, the temperature retention time t in described annealing is limited at 10-50min.When temperature retention time t is less than 8min, crystal grain is fully alligatoring not, thus is unfavorable for the iron loss and the anisotropy of iron loss that reduce non-orientation silicon steel.And when temperature retention time t is more than 60min, cost improves, and the iron loss of non-orientation silicon steel and anisotropy of iron loss do not have further improvement.The present invention, by applying suitable tension force and short-cycle annealing under preference temperature, makes crystal grain grow up rapidly, and crystal grain is being rolled to little with performance difference transversely, thus is not only conducive to reducing iron loss, and is conducive to reducing anisotropy of iron loss.
In step s 2 when percentage by weight number >=1.5% of silicon, continuous casting billet will enter holding pit and be incubated, holding temperature >=160 DEG C, and as the percentage by weight number < 1.5% of silicon, the heating-up temperature of hot rolling is 1050-1200 DEG C.In order to improve the grain structure of rotor punching further, in hot-rolled step, the deflection of more than 1100 DEG C is greater than 80%.In addition, consider and obtain good rotor punching and prevent limit from splitting, the maximum temperature difference between hot rolled silicon steel band different parts is 10-18 DEG C.
The temperature of the insulation of covering described in step S3 is 180-220 DEG C, and temperature retention time is 1h-2h.
The component of the liquid of acid pickling and rust removing described in step S3 is the industrial sulphuric acid of 13-15g/L: the chromic anhydride of 6-8%, 120-140g/L: 12-15%, and surplus is water; The temperature of acid pickling and rust removing is 85-95 DEG C, and the rust cleaning time is 15-25min.
Can also comprise normalizing heat treatment in step S3, normalizing heat treatment can be carried out after acid pickling and rust removing, also can carry out covering insulation at hot rolled coil and carry out simultaneously.
Reduction ratio in cold rolling described in step S4 is 75-90%.
The temperature of punching press described in step S6 is room temperature, and stamping pressure is 90-100Mpa.
Reprocessing described in step S6 comprises conventional machining process such as blank cutting, polishing, polishings.
Normalizing described in this method and annealing in process are all carried out in bell furnace.
In above-mentioned a kind of Novel motor rotor, described arcuate socket has eight and is uniformly distributed on axis hole madial wall, and described balancing patch has eight.
In above-mentioned a kind of Novel motor rotor, described balancing patch front end offer connecting hole and the center of circle of all connecting holes to the distance of center circle of axis hole from equal, the center of circle of described connecting hole is positioned on the center line of balancing patch.
In above-mentioned a kind of Novel motor rotor, described balancing patch front center offers the second arc notch.
Compared with prior art, beneficial effect of the present invention is:
1, in this rotor, rotor punching offers the first arc notch, rotating shaft outer surface arranges the arc convex portion corresponding to the first arc notch, and compare square lug boss, the stress surface in arc convex portion is curved surfaces, it is stressed comparatively evenly and dispersion, and its contact-making surface of the junction of arc convex portion and rotating shaft is comparatively large, be connected more firm with rotating shaft, therefore, in rotating shaft with under the opposing force of turning, this arc convex portion not easy fracture.
2, in this rotor, every sheet rotor punching offers multiple every hole, the weight of monolithic rotor punching is greatly alleviated, thus make whole weight of turning less, rotor turns is more flexible, and rotating speed is faster, makes the operating efficiency of motor higher.
3, the present invention by the relation between each component content in conservative control rotor punching material silicon steel and each composition to reduce the amount of inclusions and to control its form, and carry out the short-cycle annealing of low temperature tension force to control grain form, obtain excellent performance, the rotor punching that iron loss is little and anisotropy of iron loss is excellent.
Accompanying drawing explanation
Fig. 1 is the side structure schematic diagram of a preferred embodiment of the present invention.
Fig. 2 is the plane graph of a preferred embodiment of the present invention rotor punching.
In figure, 100, rotating shaft; 200, turn; 210, rotor punching; 211, axis hole; 212, the first arc notch; 213, every hole; 214, opening; 215, the second arc notch; 220, balancing patch; 221, fin; 222, connecting hole; 223, connecting rod.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technical scheme of the present invention is further described, but the present invention be not limited to these embodiments.
As shown in Figure 1 and Figure 2, a kind of Novel motor rotor, what comprise that rotating shaft 100 is formed by stacking with multi-disc rotor punching 210 turns 200.
Coaxial axis hole 211 is offered at the middle part of every sheet rotor punching 210, described rotor punching 210 evenly offers multiple first arc notch 212 around this axis hole 211 madial wall, rotating shaft 100 lateral wall is provided with and is multiplely positioned at the arc convex portion (not shown) of the first arc notch 212 with the first arc notch 212 one_to_one corresponding, preferably, this first arc notch 212 has eight, this arc convex portion is similarly eight, eight arc convex portions are corresponding with eight the first arc notch 212, make rotating shaft 100 and turn 200 in east, south, west, north, northeast, the southeast, northwest, uniform stressed on eight directions, southwest, relative to three or four stress points, add stress point, make simultaneously rotating shaft 100 with turn 200 be connected more firm, 200 rotary balances of turning are better.
Every sheet rotor punching 210 offers multiple every hole 213 around its periphery, each be formed respectively every both sides, hole 213 multiple with the first arc notch 212 one_to_one corresponding and the balancing patch 220 separated, the described center line of balancing patch 220 overlaps with the center line of arc notch, first arc notch 212 and balancing patch 220 one_to_one corresponding, when making to turn 200 rotation, the stressed of every sheet balancing patch 220 is also identical, prevent the different stressed differences of balancing patch 220 and cause whole turning 200 to rock, balancing patch 220 front end bilateral symmetry is provided with fin 221, the fin 221 of both sides adds the balance of monolithic balancing patch 220, the opening 214 communicated with every hole 213 is formed between adjacent two fins 221.
This rotor adopts said structure, rotor punching 210 offers the first arc notch 212, rotating shaft 100 outer surface arranges the arc convex portion corresponding to the first arc notch 212, and compare square lug boss, the stress surface in arc convex portion is curved surfaces, it is stressed comparatively evenly and dispersion, and its contact-making surface of the junction of arc convex portion and rotating shaft 100 is comparatively large, be connected more firm with rotating shaft 100, therefore, rotating shaft 100 with turn 200 opposing force under, this arc convex portion not easy fracture.
Further, adopt arc convex portion to match with the first arc notch 212, because connecting portion is cambered surface, compare plane, turn 200 and the more convenient dismounting of rotating shaft 100.
Meanwhile, every sheet rotor punching 210 offers multiple every hole 213, the weight of monolithic rotor punching 210 is greatly alleviated, thus make whole turn 200 weight less, rotor turns is more flexible, and rotating speed is faster, makes the operating efficiency of motor higher.
Further, connecting hole 222 is offered in every sheet balancing patch 220 front end, distance between arbitrary neighborhood two connecting hole 222 is equal, the center of circle of all connecting holes 222 to axis hole 211 the center of circle between distance equal, the center of circle of described connecting hole 222 is positioned on the center line of balancing patch 220, arranges the connecting rod 223 connected by all balancing patches 220 in connecting hole 222.
By starting connecting hole 222 on balancing patch 220, connecting rod 223 is set in connecting hole 222, all balancing patches 220 are strung and forms an entirety, add turn 200 globality, prevent single balancing patch 220 from departing from and affect turn 200 balance, the center of circle of connecting hole 222 is equal to the distance between axis hole 211 center of circle, and the center of circle of connecting hole 222 is positioned on the center line of balancing patch 220, make every sheet balancing patch 220 stressed more balanced, add turn 200 whole machine balancing.
Further, described balancing patch 220 front center offers the second arc notch 215, by offering the second arc notch 215, more sees the weight alleviating monolithic balancing patch 220, thus reducing to turn the weight of 200 entirety, 200 rotations that make to turn are more flexible, light.
Further, the material of described rotor punching is silicon steel, and described silicon steel is grouped into by the one-tenth of following percentage by weight: C:0.005-0.008%, Si:0.5-3.0%, Mn:0.5-0.8%, Al:0.3-0.8%, P≤0.015%, S≤0.01%, Ni:0.005-0.01%, Sb:0.002-0.01%, Se:0.005-0.015%, surplus is Fe and inevitable impurity.
Table 1: the composition of silicon steel rotor punching and weight fraction thereof in embodiment 1-4
Embodiment 1
Take raw material according to the composition of silicon steel rotor punching described in table 1 embodiment 1 and weight fraction thereof, and smelt;
Silicon steel after smelting first is carried out continuous casting working procedure at 950 DEG C, continuous casting billet is entered holding pit and be incubated at 170 DEG C; Then in order to improve the grain structure of rotor punching further, carry out hot rolling process at 1200 DEG C, and the deflection in hot-rolled step is greater than 80%; In addition, consider and obtain good rotor punching and prevent limit from splitting, the maximum temperature difference between hot rolled silicon steel band different parts is 10-18 DEG C;
Hot rolled coil after hot rolling process is carried out covering insulation at 200 DEG C, and temperature retention time is 1.5h, is then the industrial sulphuric acid of 14g/L by component: 7%, the chromic anhydride of 130g/L: 13%, surplus is that the pickle of water eliminates rust, and the temperature of acid pickling and rust removing is 90 DEG C, and the rust cleaning time is 20min; Wherein, also comprise normalizing heat treatment in this step, normalizing heat treatment can be carried out after acid pickling and rust removing, also can carry out covering insulation at hot rolled coil and carry out simultaneously;
Silicon steel coil after above-mentioned process is carried out once cold rolling operation, the steel band after cold rolling is carried out degreasing or surface degreasing, and loose winding is to reduce tension force, the reduction ratio in cold rolling is 80%;
Under hydrogen shield, the silicon strip after cold rolling is heated to 1080 DEG C, and carries out annealing in process under the tension force σ of 1.0MPa, annealing temperature retention time is 30min, is then cooled to 660 DEG C with the cooling rate of 10 DEG C/s, then naturally cools;
By above-mentioned cooled silicon strip at room temperature, under the pressure of 95Mpa, striking out rotor punching blank, through comprising, the conventional machining reprocessings such as blank cutting, polishing, polishing being obtained rotor punching finished product.
Wherein, described normalizing and annealing in process are all carried out in bell furnace.
Embodiment 2
Take raw material according to the composition of silicon steel rotor punching described in table 1 embodiment 2 and weight fraction thereof, and smelt;
Silicon steel after smelting first is carried out continuous casting working procedure at 900 DEG C, continuous casting billet is entered holding pit and be incubated at 165 DEG C; Then in order to improve the grain structure of rotor punching further, carry out hot rolling process at 1150 DEG C, and the deflection in hot-rolled step is greater than 80%; In addition, consider and obtain good rotor punching and prevent limit from splitting, the maximum temperature difference between hot rolled silicon steel band different parts is 10-18 DEG C;
Hot rolled coil after hot rolling process is carried out covering insulation at 210 DEG C, and temperature retention time is 1h, is then the industrial sulphuric acid of 13g/L by component: 7%, the chromic anhydride of 120g/L: 15%, surplus is that the pickle of water eliminates rust, and the temperature of acid pickling and rust removing is 88 DEG C, and the rust cleaning time is 18min; Wherein, also comprise normalizing heat treatment in this step, normalizing heat treatment can be carried out after acid pickling and rust removing, also can carry out covering insulation at hot rolled coil and carry out simultaneously;
Silicon steel coil after above-mentioned process is carried out once cold rolling operation, the steel band after cold rolling is carried out degreasing or surface degreasing, and loose winding is to reduce tension force, the reduction ratio in cold rolling is 85%;
Under hydrogen shield, the silicon strip after cold rolling is heated to 1100 DEG C, and carries out annealing in process under the tension force σ of 1.1MPa, annealing temperature retention time is 40min, is then cooled to 670 DEG C with the cooling rate of 9 DEG C/s, then naturally cools;
By above-mentioned cooled silicon strip at room temperature, under the pressure of 98Mpa, striking out rotor punching blank, through comprising, the conventional machining reprocessings such as blank cutting, polishing, polishing being obtained rotor punching finished product.
Wherein, described normalizing and annealing in process are all carried out in bell furnace.
Embodiment 3
Take raw material according to the composition of silicon steel rotor punching described in table 1 embodiment 3 and weight fraction thereof, and smelt;
Silicon steel after smelting first is carried out continuous casting working procedure at 850 DEG C, continuous casting billet is entered holding pit and be incubated at 160 DEG C; Then in order to improve the grain structure of rotor punching further, carry out hot rolling process at 1080 DEG C, and the deflection in hot-rolled step is greater than 80%; In addition, consider and obtain good rotor punching and prevent limit from splitting, the maximum temperature difference between hot rolled silicon steel band different parts is 10-18 DEG C;
Hot rolled coil after hot rolling process is carried out covering insulation at 180 DEG C, and temperature retention time is 2h, is then the industrial sulphuric acid of 13g/L by component: 8%, the chromic anhydride of 120g/L: 15%, surplus is that the pickle of water eliminates rust, and the temperature of acid pickling and rust removing is 85 DEG C, and the rust cleaning time is 25min; Wherein, also comprise normalizing heat treatment in this step, normalizing heat treatment can be carried out after acid pickling and rust removing, also can carry out covering insulation at hot rolled coil and carry out simultaneously;
Silicon steel coil after above-mentioned process is carried out once cold rolling operation, the steel band after cold rolling is carried out degreasing or surface degreasing, and loose winding is to reduce tension force, the reduction ratio in cold rolling is 75%;
Under hydrogen shield, the silicon strip after cold rolling is heated to 1020 DEG C, and carries out annealing in process under the tension force σ of 1.2MPa, annealing temperature retention time is 50min, is then cooled to 650 DEG C with the cooling rate of 12 DEG C/s, then naturally cools;
By above-mentioned cooled silicon strip at room temperature, under the pressure of 90Mpa, striking out rotor punching blank, through comprising, the conventional machining reprocessings such as blank cutting, polishing, polishing being obtained rotor punching finished product.
Wherein, described normalizing and annealing in process are all carried out in bell furnace.
Embodiment 4
Take raw material according to the composition of silicon steel rotor punching described in table 1 embodiment 4 and weight fraction thereof, and smelt;
Silicon steel after smelting successively is carried out continuous casting working procedure and hot-rolled process; First at 1000 DEG C, carry out continuous casting working procedure, then at 1200 DEG C, carry out hot rolling process, in order to improve the grain structure of rotor punching further, in hot-rolled step, the deflection of more than 1100 DEG C is greater than 80%; In addition, consider and obtain good rotor punching and prevent limit from splitting, the maximum temperature difference between hot rolled silicon steel band different parts is 10-18 DEG C;
Hot rolled coil after hot rolling process is carried out covering insulation at 220 DEG C, and temperature retention time is 1h, is then the industrial sulphuric acid of 15g/L by component: 6%, the chromic anhydride of 140g/L: 12%, surplus is that the pickle of water eliminates rust, and the temperature of acid pickling and rust removing is 95 DEG C, and the rust cleaning time is 15min; Wherein, also comprise normalizing heat treatment in this step, normalizing heat treatment can be carried out after acid pickling and rust removing, also can carry out covering insulation at hot rolled coil and carry out simultaneously;
Silicon steel coil after above-mentioned process is carried out once cold rolling operation, the steel band after cold rolling is carried out degreasing or surface degreasing, and loose winding is to reduce tension force, the reduction ratio in cold rolling is 90%;
Under hydrogen shield, the silicon strip after cold rolling is heated to 1120 DEG C, and carries out annealing in process under the tension force σ of 0.8MPa, annealing temperature retention time is 10min, is then cooled to 680 DEG C with the cooling rate of 8 DEG C/s, then naturally cools;
By above-mentioned cooled silicon strip at room temperature, under the pressure of 100Mpa, striking out rotor punching blank, through comprising, the conventional machining reprocessings such as blank cutting, polishing, polishing being obtained rotor punching finished product.
Wherein, described normalizing and annealing in process are all carried out in bell furnace.
Rotor punching obtained in above-described embodiment 1-4 is carried out performance test, and test result is as shown in table 2.
Comparative example is common rotor punching in prior art.
In sum, the present invention by the relation between each component content in conservative control rotor punching material silicon steel and each composition to reduce the amount of inclusions and to control its form, and carry out the short-cycle annealing of low temperature tension force to control grain form, the rotor punching of acquisition is made to have excellent performance, as higher yield strength, tensile strength, and reduce iron loss.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Claims (9)
1. a Novel motor rotor, what comprise that rotating shaft and multi-disc rotor punching be formed by stacking turns, axis hole is offered in the middle part of described rotor punching, it is characterized in that: described rotor punching evenly offers multiple first arc notch around axis hole madial wall, rotating shaft lateral wall is provided with and is multiplely positioned at the arc convex portion of the first arc notch with the first arc notch one_to_one corresponding, described rotor punching offers multiple every hole around its periphery, each be formed respectively every both sides, hole multiple with the first arc notch one_to_one corresponding and the balancing patch separated, the center line of described balancing patch overlaps with the center line of arc notch, balancing patch front end bilateral symmetry is provided with fin, the opening communicated with every hole is formed between adjacent two fins, the material of described rotor punching is silicon steel, described silicon steel is grouped into by the one-tenth of following percentage by weight: C:0.005-0.008%, Si:0.5-3.0%, Mn:0.5-0.8%, Al:0.3-0.8%, P≤0.015%, S≤0.01%, Ni:0.005-0.01%, Sb:0.002-0.01%, Se:0.005-0.015%, surplus is Fe and inevitable impurity,
The preparation method of described rotor punching comprises the steps:
S1, take raw material according to the composition of above-mentioned silicon steel and weight fraction thereof, and smelt;
S2, the silicon steel after smelting first is carried out continuous casting at 800-1000 DEG C, then carry out hot rolling process;
S3, the hot rolled coil after hot rolling process is carried out covering insulation, acid pickling and rust removing process;
S4, the silicon steel coil after above-mentioned process is carried out cold rolling process, the steel band after cold rolling is carried out degreasing or surface degreasing, and loose winding;
S5, under hydrogen shield, silicon strip after cold rolling is heated to 1020-1120 DEG C, and carries out annealing in process under the tension force σ of 0.8-1.2MPa, annealing temperature retention time is 10-50min, then be cooled to 650-680 DEG C with the cooling rate of 8-12 DEG C/s, then naturally cool;
S6, above-mentioned cooled silicon strip is struck out rotor punching blank, obtain rotor punching finished product through reprocessing.
2. a kind of Novel motor rotor according to claim 1, it is characterized in that: in the step S2 of rotor punching preparation method when percentage by weight number >=1.5% of silicon, continuous casting billet will enter holding pit and be incubated, holding temperature >=160 DEG C, as the percentage by weight number < 1.5% of silicon, the heating-up temperature of hot rolling is 1050-1200 DEG C, and in hot-rolled step, the deflection of more than 1100 DEG C is greater than 80%.
3. a kind of Novel motor rotor according to claim 1, is characterized in that: described in the step S3 of rotor punching preparation method, the temperature of covering insulation is 180-220 DEG C, and temperature retention time is 1h-2h.
4. a kind of Novel motor rotor according to claim 1, it is characterized in that: described in the step S3 of rotor punching preparation method, the component of acid pickling and rust removing liquid is the industrial sulphuric acid of 13-15g/L: 6-8%, the chromic anhydride of 120-140g/L: 12-15%, surplus is water; The temperature of acid pickling and rust removing is 85-95 DEG C, and the rust cleaning time is 15-25min.
5. a kind of Novel motor rotor according to claim 1, is characterized in that: the reduction ratio in cold rolling described in the step S4 of rotor punching preparation method is 75-90%.
6. a kind of Novel motor rotor according to claim 1, is characterized in that: described in the step S6 of rotor punching preparation method, the temperature of punching press is room temperature, and stamping pressure is 90-100Mpa.
7. a kind of Novel motor rotor according to claim 1, is characterized in that: described arcuate socket has eight and is uniformly distributed on axis hole madial wall, and described balancing patch has eight.
8. a kind of Novel motor rotor according to claim 7, it is characterized in that: described balancing patch front end offer connecting hole and the center of circle of all connecting holes to axis hole the center of circle between distance equal, the center of circle of described connecting hole is positioned on the center line of balancing patch, arranges the connecting rod connected by all balancing patches in connecting hole.
9. a kind of Novel motor rotor according to claim 1 or 7 or 8, is characterized in that: described balancing patch front center offers the second arc notch.
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| CN106253619A (en) * | 2016-08-09 | 2016-12-21 | 北京动力机械研究所 | A kind of high-speed permanent magnetic synchronous motor |
| CN107276268A (en) * | 2017-07-15 | 2017-10-20 | 芜湖瑞德机械科技有限公司 | The butterfly rotor and its processing method of car wheel electromotor |
| CN109980805A (en) * | 2017-12-28 | 2019-07-05 | 江苏联博精密科技有限公司 | A kind of new and effective self-balancing rotor of motor |
| CN109158981B (en) * | 2018-08-02 | 2020-06-05 | 汕头市德晟模型科技有限公司 | Automatic production and processing equipment for servo drive motor |
| CN110492700A (en) * | 2019-08-13 | 2019-11-22 | 宁国井田机电有限公司 | A kind of production technology of compressor motor stator |
| CN110423877A (en) * | 2019-08-23 | 2019-11-08 | 山西太钢不锈钢股份有限公司 | Thin gauge high grade silicon steel and its manufacturing method |
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| JP2000125523A (en) * | 1998-10-09 | 2000-04-28 | Shibaura Mechatronics Corp | Motor and its manufacture |
| DE19943951A1 (en) * | 1999-09-14 | 2001-03-22 | Bosch Gmbh Robert | Rotor for electrical machines especially switched reluctance machines, comprises number of fixing elements which correspond to at least half of number of rotor poles |
| EP1577413B1 (en) * | 2002-12-24 | 2019-06-05 | JFE Steel Corporation | Fe-Cr-Si NON-ORIENTED ELECTROMAGNETIC STEEL SHEET AND PROCESS FOR PRODUCING THE SAME |
| US20050000596A1 (en) * | 2003-05-14 | 2005-01-06 | Ak Properties Inc. | Method for production of non-oriented electrical steel strip |
| JP2006158136A (en) * | 2004-11-30 | 2006-06-15 | Nidec Sankyo Corp | Small motor |
| CN101189780B (en) * | 2005-06-07 | 2010-09-15 | 株式会社美姿把 | Armature of rotating electric machine and method of manufacturing the same |
| JP5362399B2 (en) * | 2009-03-13 | 2013-12-11 | 本田技研工業株式会社 | Rotating electric machine and method of manufacturing rotating electric machine |
| US8138642B2 (en) * | 2009-06-17 | 2012-03-20 | Hamilton Sundstrand Corporation | Oil cooled generator |
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Effective date of registration: 20201211 Address after: No.258 Nanche Road, Wuxiang Town, Yinzhou District, Ningbo City, Zhejiang Province Patentee after: ZHUOERBO (NINGBO) PRECISION DYNAMO-ELECTRIC Co.,Ltd. Address before: No.1 Yuwang Baozhan Road, Wuxiang Town, Yinzhou District, Ningbo City, Zhejiang Province Patentee before: NINGBO SHUNCHENG ELECTROMECHANICAL Co.,Ltd. |