CN109302010A - A kind of preparation process of the novel solid rotor applied to switched reluctance machines - Google Patents
A kind of preparation process of the novel solid rotor applied to switched reluctance machines Download PDFInfo
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- CN109302010A CN109302010A CN201811448539.8A CN201811448539A CN109302010A CN 109302010 A CN109302010 A CN 109302010A CN 201811448539 A CN201811448539 A CN 201811448539A CN 109302010 A CN109302010 A CN 109302010A
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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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- 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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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Abstract
The invention discloses a kind of preparation process of novel solid rotor applied to switched reluctance machines, include the following steps: to be put into 6.5% silicon in smelting furnace, 1% ~ 5% cobalt sesquioxide and 1% manganese, remaining is filled with iron block；Vacuum arc melting；Later with 80 DEG C/h cooling velocity be cooled to 600 DEG C or less it is cold with furnace or air-cooled be down to room temperature；Take out high silicon steel sample of annealing；Solid rotor is rolled using warm-rolling technique；Annealing.The characteristics of novel rotor prepared by the present invention has impurity less, and chemical constituents analysis is uniform, compact structure, warm-rolling technique can effectively eliminate product internal stress, and annealing process can then eliminate a large amount of bubbles and the second phase field trash.
Description
Technical field
The present invention relates to a kind of application of novel rotor on switched reluctance machines, more particularly to using 6.5% high silicon steel
And pass through a series of preparation of Advanceds, the technical field of the research and development applied to solid rotor novel inside motor.
Background technique
The advantages that switched reluctance machines have structure simple, high reliablity, at low cost easy-maintaining；But disadvantage is similarly bright
It is aobvious, it is mainly shown as that torque ripple is big, the reasons such as noise is big.Because its rotor uses cast iron or cast steel material, melt circuit and magnetic
Road is integrated.In the operation of big revolutional slip, skin effect is than stronger, and vortex and flux concentrating are in rotor surface, rotor surface
It is lost very big.Utilization rate is not very high at present.Normal steel casting solid rotor is used on motor in the past, though this rotor
So relatively broad application is obtained, but it will lead to that motor torque is too small, and power is lower, set in some large-scale or heavy types
There is also compared with big limitation for standby upper application.
Rotor is the large forgings for limiting steam turbine service life, and large-size steam turbine integral rotor, which can be divided into, centre bore
The solid rotor of sleeve rotor and non-stop layer hole, the difference of rotor structure and the metallurgical quality of forging are closely related.In order to ensure
The safety of rotor, rotor centering remove the metal of centre metallurgical quality difference, obtain large-scale sleeve rotor
It is widely applied.But the disadvantage of sleeve rotor is that the maximum stress on rotor inner hole surface almost increases one times, is reduced
The fatigue life of rotor.The reason of from rotor centering, is it is inferred that if the metallurgical quality of rotor forging is good, in rotor
Defect is small and lacks, and institutional framework, the performance of rotor are uniform, and rotor just need not centering.The turbine making producer in West Europe and
KWU early just manufactures solid rotor with quality forging in the 1950s, has thousands of solid rotors being safely operated.Cause
This, manufacturing solid rotor with quality forging is safe and feasible.With the continuous improvement of modern metallurgical technology, quality forging rate is got over
Come higher, solid rotor is bound to will be selected by more producers.
Summary of the invention
In order to solve prior art problem, it is an object of the present invention to overcome the deficiencies of the prior art, and to provide one kind
A series of solid rotor prepared under heat treating regimes using the high silicon steel of 6.5% silicone content, with traditional cast iron or common silicon steel
Piece preparation solid rotor compare, this novel solid rotor mainly has following advantage: (1) under high temperature solid rotor from
Mental and physical efforts substantially reduce, and the centrifugal force of solid rotor about reduces by 70% than sleeve rotor, and creep impairment is low, allow rotor higher
At a temperature of run.(2) the maximum static stress of solid rotor reduces, and so that critical crack size is become larger, extends the use of rotor
Service life.(3) solid rotor is amenable to thermal stress caused by cold conditions, warm state and hot starting, hot start, can relatively rapid start.(4)
The cold working process for simplifying rotor, reduces the manufacturing cost of rotor.This novel rotor is applied to switched reluctance machines
Way, belong to motor research and development correlative technology field.The present invention can obtain uniform texture, and solid turn of good performance
Son, this solid rotor have a lesser middle cardiac stress, larger critical defect size, and structure is simple, mechanical strength and balance are excellent
It is good, the advantages that unique vortex characteristic.The present invention is a kind of effective method for improving motor working performance, is suitable for switch magnetic
Motor is hindered in the application in wider field, and to high silicon steel solid rotor mechanical performance, electromagnetic performance is evaluated, and is suitable for material
Expect performance detection technical field.
In order to achieve the above objectives, the present invention adopts the following technical scheme: a kind of novel reality applied to switched reluctance machines
The preparation process of heart rotor, includes the following steps:
A. clean in furnace, be put into 6.5% silicon, 1% ~ 5% cobalt sesquioxide and 1% manganese, remaining is filled with iron block；Wherein
Silicon, cobalt etc. are added in the form of a powder.Smelting furnace airtightness is examined, it is ensured that airtightness is good.It vacuumizes, is passed through Ar or N2, catch up with
Furnace air is walked, electric arc melting is then used.Pressure is general < 0.05MPa, electromagnetic agitation, stirring frequency are used in fusion process
Rate is 7Hz ~ 20Hz, wherein preferably 12Hz ~ 18Hz；To prevent the component segregation phenomenon occurred among fusion process；
B. furnace power supply is opened, hydrogen atmosphere is passed through, for volume between 10% ~ 30%, heating principle is usually that the slow low temperature of high temperature can fit
Degree is fast, general<500 DEG C can freely heat up, less than 120 DEG C/h, sample is larger to be kept at 650 DEG C heating speed at>550 DEG C
The processing of 60min samming is further continued for heating up.In 850 DEG C ~ 1000 DEG C heat preservation 15min ~ 2h, temperature is higher, and time more germination is bigger,
The addition of cobalt sesquioxide causes magnetic property to increase；Later with 80 DEG C/h cooling velocity be cooled to 600 DEG C or less it is cold or empty with furnace
It is cold to be down to room temperature；
C. protective gas is closed, general supply takes out high silicon steel sample of annealing；
D. it rolls, the present invention uses warm-rolling technique；Determine that start rolling temperature at 400 DEG C ~ 650 DEG C, 480 DEG C of final rolling temperature or more, rolls
Passage 8 ~ 16 times processed, slab carries out centering on the basis of rolling centerline, it is ensured that both ends and rolling center on width of plate slab direction
The distance of line is consistent, cannot there is deviation, to roll；
E. it makes annealing treatment；Steel plate is placed in annealing furnace, annealing temperature is located between 850 DEG C ~ 1000 DEG C, and annealing time is
Between 40min-60min, room temperature is cooled to the furnace later.
The present invention respectively to the power of normal steel casting solid rotor motor and new-type high silicon steel solid rotor motor because
Number, efficiency and starting performance have carried out verification experimental verification.By Data Comparison Analysis, suitable switched reluctance machines are obtained
Solid rotor.The stator knot of normal steel casting solid rotor switched reluctance motor and high silicon steel solid rotor switched reluctance motor
Structure is identical, and the T shape equivalent circuit of normal steel casting solid rotor motor can be used to analyze its parameter and main performance.
The present invention compared with prior art, has following obvious prominent substantive distinguishing features and remarkable advantage:
The characteristics of 1. novel rotor prepared by the present invention has impurity less, and chemical constituents analysis is uniform, compact structure, warm-rolling
Technique can effectively eliminate product internal stress, and annealing process can then eliminate a large amount of bubbles and the second phase field trash.Difference
It is standby in traditional silicon steel, possess better mechanical property, brittleness is improved, and relative to smooth solid rotor, participates in three oxidations
The high silicon steel solid rotor of two cobalts can generate relatively good magnetic conductivity, increase the rated power of motor.
2. solid rotor switched reluctance machines prepared by the present invention are with its unique advantage in high-speed motor field, high silicon
Steel solid rotor structure is simple, and mechanical strength and balance are high, is suitble to frequent heavy-load start or works long hours in braking shape
State, so the research for solid and spherical TiO_2 is of very high actual application value, relative to magneto and reluctance type
Planar motor can be realized in plane and move along a straight line in larger range, be suitble to the driving of heavy load plane, application prospect and value
It is very far-reaching.
3. the present invention uses more advanced and excellent technique in rotor preparation process, rotor surface defect is reduced
And the generation of crackle, the service life of rotor is substantially prolonged, to have done ground-breaking research applied to other motors.
Specific embodiment
Above scheme is described further below in conjunction with specific implementation example, the preferred embodiment of the present invention is described in detail such as
Under:
Embodiment 1:
In the present embodiment, a kind of preparation process of the novel solid rotor applied to switched reluctance machines, includes the following steps:
A. it cleans in furnace, is put into 6.5% silicon, rest part iron block.Smelting furnace airtightness is examined, it is ensured that airtightness is good.
It vacuumizes, is passed through Ar or H2, drive furnace air away, then use electric arc melting.Pressure is general < 0.05MPa, in fusion process
Using electromagnetic agitation, stirring frequency is 7Hz ~ 20Hz, wherein preferably 12Hz ~ 18Hz；With prevent from occurring among fusion process
Component segregation phenomenon.
B. furnace power supply is opened, hydrogen atmosphere is passed through, furnace gas group becomes 10%H2, in < 600 DEG C of speed with 7 DEG C/min
Rate heating, heating speed is 60 DEG C/h at > 600 DEG C, and sample handles in 600 DEG C of holdings 30min sammings and is further continued for heating up.850
DEG C ~ 1000 DEG C of heat preservation 1h, temperature is higher, and time more germination is bigger, and magnetic property increases mechanical properties decrease simultaneously.Later with 80
DEG C/h cooling velocity be cooled to 600 DEG C or less it is cold with furnace or air-cooled be down to room temperature.
C. take out sample, with 80 DEG C/h cooling velocity be cooled to 600 DEG C or less it is cold with furnace or air-cooled be down to room temperature；It closes
Protective gas, general supply take out high silicon steel sample of annealing.
D. it rolls, the present invention uses warm-rolling technique；Determine start rolling temperature at 450 DEG C or more, 380 DEG C of final rolling temperature or more,
Rolling pass 8 times, slab carries out centering on the basis of rolling centerline, it is ensured that both ends and rolling centerline on width of plate slab direction
Distance it is consistent, cannot have deviation, to roll.
E. it makes annealing treatment；Steel plate is placed in annealing furnace, annealing temperature is located at 900 DEG C, annealing time 40min-
Between 60min, room temperature is cooled to the furnace later.
In the present embodiment, the identical solid rotor switched reluctance motor of two stators is devised, a rotor is general
Logical cast steel structure, another rotor are freshly prepd high silicon steel rotor.Motor basic parameter is as follows: rated power: PN=10. 5
kW；Voltage rating: 380 V of UN=AC；Number of poles: 2p=4；Stator outer diameter: the mm of D2=210；Number of stator slots: Z=36；Iron
Heart length: the mm of L=145.It makes a service test respectively to two motors, compares and obtain and be most suitable for using on lifting operating mechanism
A kind of solid rotor switched reluctance motor.Load test is carried out on special motor experiment platform, is become using another
Frequency motor is loaded as load.
Influence of the particularly suitable comparison different rotor of the present embodiment method to same motor performance, to freshly prepd high silicon steel
Rotor carries out effective evaluation.Starting performance is to evaluate the important performance indicator of motor.In order to more preferably compare two kinds of motor
Starting performance measures the maximum starting torque of motor, carries out performance study to motor by the way of stall.When test,
Motor shaft end is connected by ring flange with locked-rotor device.The result of evaluation and test is accurate, comprehensively.
Embodiment 2:
The present embodiment is substantially the same manner as Example 1, is particular in that:
In the present embodiment, a kind of preparation process of the novel solid rotor applied to switched reluctance machines, includes the following steps:
A. this step is the same as example 1；
B. furnace atmosphere is adjusted to 20%H in2；
D. rolling pass is changed to 12 times, remaining is constant.
In the present embodiment, the identical solid rotor switched reluctance motor of two stators is devised, a rotor is general
Logical cast steel structure, another rotor are freshly prepd high silicon steel rotor.Motor basic parameter is as follows: rated power: PN=10. 5
kW；Voltage rating: 380 V of UN=AC；Number of poles: 2p=4；Stator outer diameter: the mm of D2=210；Number of stator slots: Z=36；Iron
Heart length: the mm of L=145.It makes a service test respectively to two motors, compares and obtain and be most suitable for using on lifting operating mechanism
A kind of solid rotor switched reluctance motor.Load test is carried out on special motor experiment platform, is become using another
Frequency motor is loaded as load.
Influence of the particularly suitable comparison different rotor of the present embodiment method to same motor performance, to freshly prepd high silicon steel
Rotor carries out effective evaluation.Starting performance is to evaluate the important performance indicator of motor.In order to more preferably compare two kinds of motor
Starting performance measures the maximum starting torque of motor, carries out performance study to motor by the way of stall.When test,
Motor shaft end is connected by ring flange with locked-rotor device.The result of evaluation and test is accurate, comprehensively.
Embodiment 3:
The present embodiment is substantially the same as in the previous example, and is particular in that:
In the present embodiment, a kind of preparation process of the novel solid rotor applied to switched reluctance machines, includes the following steps:
A. this step is same as Example 1；
B. furnace atmosphere is adjusted to 30%H in2；
D. rolling pass is changed to 14 times, remaining is constant.
In the present embodiment, the identical solid rotor switched reluctance motor of two stators is devised, a rotor is general
Logical cast steel structure, another rotor are freshly prepd high silicon steel rotor.Motor basic parameter is as follows: rated power: PN=10. 5
kW；Voltage rating: 380 V of UN=AC；Number of poles: 2p=4；Stator outer diameter: the mm of D2=210；Number of stator slots: Z=36；Iron
Heart length: the mm of L=145.It makes a service test respectively to two motors, compares and obtain and be most suitable for using on lifting operating mechanism
A kind of solid rotor switched reluctance motor.Load test is carried out on special motor experiment platform, is become using another
Frequency motor is loaded as load.
Influence of the particularly suitable comparison different rotor of the present embodiment method to same motor performance, to freshly prepd high silicon steel
Rotor carries out effective evaluation.Starting performance is to evaluate the important performance indicator of motor.In order to more preferably compare two kinds of motor
Starting performance measures the maximum starting torque of motor, carries out performance study to motor by the way of stall.When test,
Motor shaft end is connected by ring flange with locked-rotor device.The result of evaluation and test is accurate, comprehensively.
Embodiment 4:
The present embodiment is substantially the same as in the previous example, and is particular in that:
In the present embodiment, a kind of preparation process of the novel solid rotor applied to switched reluctance machines, includes the following steps:
A. this step is same as Example 1；
B. furnace atmosphere is adjusted to 40%H in2；
D. rolling pass is changed to 12 times, remaining is constant.
In the present embodiment, the identical solid rotor switched reluctance motor of two stators is devised, a rotor is general
Logical cast steel structure, another rotor are freshly prepd high silicon steel rotor.Motor basic parameter is as follows: rated power: PN=10. 5
kW；Voltage rating: 380 V of UN=AC；Number of poles: 2p=4；Stator outer diameter: the mm of D2=210；Number of stator slots: Z=36；Iron
Heart length: the mm of L=145.It makes a service test respectively to two motors, compares and obtain and be most suitable for using on lifting operating mechanism
A kind of solid rotor switched reluctance motor.Load test is carried out on special motor experiment platform, is become using another
Frequency motor is loaded as load.
Influence of the particularly suitable comparison different rotor of the present embodiment method to same motor performance, to freshly prepd high silicon steel
Rotor carries out effective evaluation.Starting performance is to evaluate the important performance indicator of motor.In order to more preferably compare two kinds of motor
Starting performance measures the maximum starting torque of motor, carries out performance study to motor by the way of stall.When test,
Motor shaft end is connected by ring flange with locked-rotor device.The result of evaluation and test is accurate, comprehensively.
Experimental Comparison analysis:
The result of above-described embodiment experimental test and analysis such as the following table 1,
1. 1 ~ embodiment of the embodiment of the present invention of table, 4 electrochemical test treated each sample detection performance parameter list
| Embodiment | Embodiment 1 | Embodiment 2 | Embodiment 3 | Embodiment 4 | Check experiment |
| Surface defect size | 0.8mm | 0.6mm | 1.2mm | 1.5mm | 3.7mm |
| Motor power (output)/W | 47362 | 43651 | 50246 | 45136 | 21658 |
| Locked-rotor torque/N.m | 106.87 | 103.46 | 112.47 | 98.35 | 82.13 |
From the above analysis, calculation shows that, when the metallurgical quality of rotor forging, material property, stress and running environment are identical
When, the working performance of high silicon steel solid rotor switched reluctance machines is better than solid plain rotor electric machine, using modern metallurgical technology
The quality forging manufacture solid rotor of production is safe and feasible.As can be seen that the addition of cobalt sesquioxide improves rotor
Magnetic conductivity enhances its electromagnetic performance；The locked-rotor torque of novel rotor motor is all much higher than plain cast iron solid rotor, this just says
The bright power that it is generated also is significantly larger than common rotor motor, and the experimental data obtained in this manner is accurate and comprehensive
's.
The present invention is not limited to the above embodiments, can make a variety of variations with the purpose of innovation and creation according to the present invention,
Change, modification, substitution, combination or the simplification made under the Spirit Essence and principle of all technical solutions according to the present invention, should be
The substitute mode of effect prepares height using advanced metallurgical method without departing from the present invention as long as meeting goal of the invention of the invention
The technical principle and inventive concept of silicon steel solid rotor, belong to protection scope of the present invention.
Claims (6)
1. a kind of preparation process of the novel solid rotor applied to switched reluctance machines, includes the following steps:
A. clean in furnace, be put into 6.5% silicon, 1% ~ 5% cobalt sesquioxide and 1% manganese, remaining is filled with iron block；Wherein
Silicon, cobalt, manganese are added in the form of a powder, and smelting furnace is closed, vacuumize, and are passed through Ar or N2, furnace air is driven away, then using electricity
Arc melting, pressure is general < 0.05MPa, electromagnetic agitation is used in fusion process, stirring frequency is 7Hz ~ 20Hz；
B. furnace power supply is opened, hydrogen atmosphere is passed through, for volume between 10% ~ 30%, heating principle is usually that the slow low temperature of high temperature can fit
Degree is fast, general<500 DEG C can freely heat up, less than 120 DEG C/h, sample is larger to be kept at 650 DEG C heating speed at>550 DEG C
The processing of 60min samming is further continued for heating up, and in 850 DEG C ~ 1000 DEG C heat preservation 15min ~ 2h, temperature is higher, and time more germination is bigger,
The addition of cobalt sesquioxide causes magnetic property to increase, later with 80 DEG C/h cooling velocity be cooled to 600 DEG C or less it is cold or empty with furnace
It is cold to be down to room temperature；
C. protective gas is closed, general supply takes out high silicon steel sample of annealing；
D. it rolls, the present invention uses warm-rolling technique；Determine that start rolling temperature at 400 DEG C ~ 650 DEG C, 480 DEG C of final rolling temperature or more, rolls
Passage 8 ~ 16 times processed, slab carries out centering on the basis of rolling centerline, it is ensured that both ends and rolling center on width of plate slab direction
The distance of line is consistent, cannot there is deviation, to roll；
E. it makes annealing treatment；Steel plate is placed in annealing furnace, annealing temperature is 850 DEG C ~ 1000 DEG C, annealing time 40min-
60min cools to room temperature with the furnace later.
2. the preparation process of novel solid rotor according to claim 1, it is characterised in that: selected in the step a
Iron block first passes through oil removing polishing in advance, in 200 mesh, 600 mesh, 800 mesh and 1000 polish step by step now and with deionized water with
Acetone soln cleans up.
3. the preparation process of novel solid rotor according to claim 1, it is characterised in that: stirring frequency in the step a
For 12Hz ~ 18Hz.
4. the preparation process of novel solid rotor according to claim 1, it is characterised in that: the motor basic parameter prepared
It is as follows: rated power: the kW of PN=7. 5；Voltage rating: 380 V of UN=AC；Number of poles: 2p=4；Stator outer diameter: D2=210
mm；Number of stator slots: Z=36；Core length: the mm of L=145.
5. the preparation process of the novel solid rotor according to claim 1, it is characterised in that: the switched reluctance machines are adopted
Power factor, efficiency and starting performance is carried out with the T shape equivalent circuit of normal steel casting solid rotor motor test
Card.
6. the method for preparing novel solid rotor using advanced metallurgical technology according to claim 1, it is characterised in that: described
Annealing temperature in step e is 900 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811448539.8A CN109302010A (en) | 2018-11-30 | 2018-11-30 | A kind of preparation process of the novel solid rotor applied to switched reluctance machines |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201811448539.8A CN109302010A (en) | 2018-11-30 | 2018-11-30 | A kind of preparation process of the novel solid rotor applied to switched reluctance machines |
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Citations (5)
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|---|---|---|---|---|
| US4990197A (en) * | 1986-08-01 | 1991-02-05 | Allied-Signal, Inc. | Heat treatment of rapidly quenched Fe-6.5 wt % Si ribbon |
| CN103998629A (en) * | 2011-12-20 | 2014-08-20 | Posco公司 | High silicon steel sheet having excellent productivity and magnetic properties and method for manufacturing same |
| CN104150894A (en) * | 2014-08-28 | 2014-11-19 | 电子科技大学 | Heat shock resistant nickel-zinc ferrite and preparation method thereof |
| CN107119178A (en) * | 2017-05-03 | 2017-09-01 | 南通长江电器实业有限公司 | A kind of dynamo sheet annealing process |
| CN108456829A (en) * | 2018-02-26 | 2018-08-28 | 合肥尚强电气科技有限公司 | Transformer silicon steel sheet and preparation method thereof |
-
2018
- 2018-11-30 CN CN201811448539.8A patent/CN109302010A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4990197A (en) * | 1986-08-01 | 1991-02-05 | Allied-Signal, Inc. | Heat treatment of rapidly quenched Fe-6.5 wt % Si ribbon |
| CN103998629A (en) * | 2011-12-20 | 2014-08-20 | Posco公司 | High silicon steel sheet having excellent productivity and magnetic properties and method for manufacturing same |
| CN104150894A (en) * | 2014-08-28 | 2014-11-19 | 电子科技大学 | Heat shock resistant nickel-zinc ferrite and preparation method thereof |
| CN107119178A (en) * | 2017-05-03 | 2017-09-01 | 南通长江电器实业有限公司 | A kind of dynamo sheet annealing process |
| CN108456829A (en) * | 2018-02-26 | 2018-08-28 | 合肥尚强电气科技有限公司 | Transformer silicon steel sheet and preparation method thereof |
Non-Patent Citations (1)
| Title |
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| 骆忠汉 等: "温轧温度对Fe-6.5%Si薄板组织、织构和磁性的影响", 《钢铁研究》 * |
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