CN109067033A - Rotor assembly and motor - Google Patents

Rotor assembly and motor Download PDF

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Publication number
CN109067033A
CN109067033A CN201810983459.6A CN201810983459A CN109067033A CN 109067033 A CN109067033 A CN 109067033A CN 201810983459 A CN201810983459 A CN 201810983459A CN 109067033 A CN109067033 A CN 109067033A
Authority
CN
China
Prior art keywords
rotor
bar
core
rotor core
assembly according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810983459.6A
Other languages
Chinese (zh)
Inventor
方磊
卢素华
贾武豪
刘思苑
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201810983459.6A priority Critical patent/CN109067033A/en
Publication of CN109067033A publication Critical patent/CN109067033A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/22Rotating parts of the magnetic circuit
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K17/00Asynchronous induction motors; Asynchronous induction generators
    • H02K17/02Asynchronous induction motors
    • H02K17/16Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors
    • H02K17/165Asynchronous induction motors having rotors with internally short-circuited windings, e.g. cage rotors characterised by the squirrel-cage or other short-circuited windings

Abstract

The present invention provides a kind of rotor assembly and motor.The rotor assembly includes rotor core (1), rotor bar (2) and short stream ring (3), rotor bar (2) is removably disposed on rotor core (1) along the circumferential direction of rotor core (1), short stream ring (3) setting is fixed on rotor core (1) at the both ends of rotor core (1), and by rotor bar (2).Rotor assembly according to the present invention is easy to overhaul rotor bar, reduces the cost of overhaul.

Description

Rotor assembly and motor
Technical field
The invention belongs to technical field of motors, and in particular to a kind of rotor assembly and motor.
Background technique
The threephase asynchronous machine that industrial motor is often used, rotor portion frequently with skewed slot form cast-aluminum rotor, due to The distance between two slot of rotor punching does not become, but the shortest distance between cast aluminium conducting bar will be multiplied by the cosine value of angle of bevel (value is generally less than 1), to keep distance between two cast-in aluminum squirrel cage items closer, while there are induced potentials for squirrel-cage bar, to increase Transverse current in big iron core, high-frequency current can be induced in rotor core, will increase load in the bad situation of slot insulation Stray loss virtually increases motor total losses, reduces motor performance.
Traditional cast-aluminum rotor technique is that the rotor core being overrided to form is complete by indentation cast aluminium (centrifugal aluminum casting) mode At cast aluminium process.But often there is stomata (bubble) defective workmanship in casting process in cast aluminium, is not easy to be detected, motor complete machine fortune Row can increase again because of the rotor resistance that rotor stomata makes, and loss increases, and then reduce motor performance.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that providing a kind of rotor assembly and motor, it is easy to rotor bar It is overhauled, reduces the cost of overhaul.
To solve the above-mentioned problems, the present invention provides a kind of rotor assembly, including rotor core, rotor bar and short stream Ring, rotor bar are removably disposed on rotor core along the circumferential direction of rotor core, and short stream ring is arranged in the two of rotor core End, and rotor bar is fixed on rotor core.
Preferably, circumferentially arranged on rotor core to have multiple cage grooves, rotor bar is removably disposed in cage grooves It is interior.
Preferably, the section of cage grooves is round, ellipse or polygon.
Preferably, the section of cage grooves is circle, along the circumferential direction of rotor core, sectional area, diameter or the week of cage grooves It is long to be distributed in sineization.
Preferably, it is provided with fixation hole on rotor core, screw rod is equipped in fixation hole, short stream ring is fixed on by screw rod On rotor core.
Preferably, one end of short stream ring towards rotor core is provided with conducting bar slot, and rotor bar is arranged in correspondingly In conducting bar slot.
It preferably, is interference fit between rotor bar and conducting bar slot.
Preferably, the magnitude of interference between rotor bar and conducting bar slot is 0.01-0.03mm.
Preferably, short stream ring is provided with fan blade far from one end of rotor core.
Preferably, fan blade is removably disposed on the end face of short stream ring.
Preferably, insulating layer is coated with outside rotor bar.
Preferably, short stream ring and/or rotor bar are made of copper product.
According to another aspect of the present invention, a kind of motor, including rotor are provided, which is above-mentioned electricity Machine rotor.
Rotor assembly provided by the invention, including rotor core, rotor bar and short stream ring, rotor bar is along rotor core Circumferential direction be removably disposed on rotor core, the both ends of rotor core are arranged in short stream ring, and rotor bar is fixed on On rotor core.In the rotor assembly, since rotor bar is removably disposed on rotor core, works as and turn When sub- failure, rotor bar can be removed from rotor core, rotor bar and rotor core are overhauled respectively, it can It conveniently detects the component to go wrong, and conveniently problem component is replaced, the cost of overhaul can be reduced, improve maintenance effect Rate.
Detailed description of the invention
Fig. 1 is the schematic perspective view of the rotor assembly of the embodiment of the present invention;
Fig. 2 is the decomposition texture schematic diagram of the rotor assembly of the embodiment of the present invention;
Fig. 3 is the structural schematic diagram of the first end of the short stream ring of the rotor assembly of the embodiment of the present invention;
Fig. 4 is the structural schematic diagram of the second end of the short stream ring of the rotor assembly of the embodiment of the present invention;
Fig. 5 is the structural schematic diagram of the rotor core of the rotor assembly of the embodiment of the present invention.
Appended drawing reference indicates are as follows:
1, rotor core;2, rotor bar;3, short stream ring;4, cage grooves;5, fixation hole;6, screw rod;7, conducting bar slot;8, wind Leaf.
Specific embodiment
In conjunction with referring to figs. 1 to 5, according to an embodiment of the invention, rotor assembly includes that rotor core 1, rotor are led Item 2 and short stream ring 3, rotor bar 2 is removably disposed on rotor core 1 along the circumferential direction of rotor core 1, and short stream ring 3 is arranged It is fixed on rotor core 1 at the both ends of rotor core 1, and by rotor bar 2.
In the rotor assembly, since rotor bar 2 is removably disposed on rotor core 1, works as and turn When sub- failure, rotor bar 2 can be removed from rotor core 1, rotor bar 2 and rotor core 1 are overhauled respectively, Convenient for checking rotor portion failure cause, and conveniently problem component is replaced, the cost of overhaul can be reduced, improves maintenance Efficiency.
Preferably, circumferentially arranged on rotor core 1 to have multiple cage grooves 4, rotor bar 2 is removably disposed in mouse cage In slot 4.By mode rotor bar 2 being removably disposed in cage grooves 4, can determine rotor by cage grooves 4 The installation site of conducting bar 2, to guarantee that being formed by rotor assembly has the function that original traditional cast-aluminum rotor has, and protects Demonstrate,prove the working performance of motor.
The section of cage grooves 4 is round, ellipse or polygon.
In the present embodiment, the section of cage grooves 4 is circle, along the circumferential direction of rotor core 1, the sectional area of cage grooves 4, Diameter or perimeter are distributed in sineization.
Preferably, it is distributed, can be optimized using sineization for installing the sectional area size of the cage grooves 4 of rotor bar 2 Motor gas-gap magnetic field, reduced harmonic content, and then electric efficiency and power factor are improved, reduce noise of motor.
The cross-sectional sizes of the cage grooves 4 of rotor core 1 are distributed using sineization, because of voltage U phase at the short stream ring of two ends of rotor Deng, according to resistance formula R=ρ L/S, under the premise of rotor bar material determines that ρ is certain and rotor bar length L is certain, electricity R relationship proportional to sectional area S is hindered, therefore the size of current in rotor bar 2 is also distributed at sineization, can optimize motor gas-gap Magnetic field sine degree, weaken air-gap field in harmonic content, reduce because in air-gap field harmonic content generate added losses with And electric and magnetic oscillation, and then the efficiency and power factor of motor are improved, reduce noise of motor.
It is provided with fixation hole 5 on rotor core 1, screw rod 6 is equipped in fixation hole 5, short stream ring 3 is fixed on by screw rod 6 On rotor core 1.Corresponding position on short stream ring 3 is also equipped with fixation hole 5, and the short stream ring 3 at 1 both ends of rotor core is logical It crosses screw rod 6 to link together with rotor core 1, and the short stream one end of ring 3 far from rotor core 1 is stretched out at the both ends of screw rod 6, later The both ends of screw rod 6 are fixed by nut, to carry out secondary fixation being bolted.
One end of short stream ring 3 towards rotor core 1 is provided with conducting bar slot 7, and conducting bar is arranged in rotor bar 2 correspondingly In slot 7.Conducting bar slot 7 is open at one end towards rotor core 1, other end closing, therefore can be packed into conducting bar slot in rotor bar 2 When in 7, the installation of rotor bar 2 is positioned along axial direction, so as to which rotor bar 2 is firmly secured at rotor core In 1, avoid rotor bar 2 in the rotor assembly course of work along axially displaced, the stability of guarantee motor working performance And reliability.
It preferably, is interference fit between rotor bar 2 and conducting bar slot 7.It is highly preferred that rotor bar 2 and conducting bar slot 7 it Between magnitude of interference be 0.01-0.03mm, rotor bar 2 and conducting bar slot 7 can be made to completely attach to, guarantee that electric current can be led in rotor Circulation is formed in the short stream ring-rotor bar of item-.
Short stream ring 3 is provided with fan blade 8 far from one end of rotor core 1.
Preferably, fan blade 8 is removably disposed on the end face of short stream ring 3.In the present embodiment, fan blade 8 passes through screw Fixed mode is removably disposed on the end face of short stream ring 3, be can according to need and is assembled and disassembled to fan blade 8, or replacement The specification of fan blade 8 enables to the use of fan blade 8 more to match with the structure of rotor assembly.
Preferably, it is coated with insulating layer outside rotor bar 2, the contact electricity between rotor bar 2 and rotor core 1 can be increased Resistance weakens the transverse current generated in rotor core 1 by cage grooves 4, reduces the added losses generated by transverse current, Jin Erti The efficiency of lifting motor.
Short stream ring 3 and/or rotor bar 2 are made of copper product.
The conducting bar slot 7 on fixation hole 5 and short stream ring 3 on rotor core 1 is circumferentially uniformly distributed, motor operation mistake Cheng Zhong, the short electric current flowed through in ring 3 that flows have no positive effect to the main field of motor.But the material of the short stream ring 3 at both ends is changed At copper, the resistivity of copper is 1.75 × 10-8 Ω m, and the material of the end ring of traditional cast-aluminum rotor is aluminium, the resistivity of aluminium 2.83 × 10-8 Ω m, under the premise of short stream ring is onesize, according to the calculation formula of resistanceIt is found that resistance value Directly proportional to resistivity, the short stream ring of copper stream loop resistance value shorter than aluminium reduces:
To reduce the total losses of rotor portion, the performance of motor is promoted.
Meanwhile the tensile strength of copper product is 200MPa, the tensile strength of aluminium is 80MPa, in rotor high-speed cruising In the state of, rotor stability operating safety factor is helped to improve using the short stream ring of the higher copper of tensile strength.
The material of rotor bar 2 can use aluminium and copper, copper is lower than the resistivity of aluminium, using copper bar in the case where, It can reduce the self-resistance of rotor bar 2, reduce the loss of rotor bar 2, improve the efficiency of motor.
Traditional cast-aluminum rotor process characteristic is the cast aluminium for completing rotor core by way of being pressed into cast aluminium by Cast Aluminum Dies Process, for traditional cast-aluminum rotor, the built-up rotor component of the application is first to be laminated into turn by multiple rotor punchings Sub- iron core 1, after the rotor bar 2 of prefabricated completion is inserted into the cage grooves 4 of rotor core 1, fixation hole 5 is passed through by screw rod 6 The mode of positioning, it is successively that the parts such as short stream ring 3, rotor core 1 (containing rotor bar 2), short stream ring 3 is fixed on one wire, Guarantee that rotor is to maintain the state stood, the short stream ring 3 at both ends is squeezed to rotor core 1 using hand-operated hydraulic press, rotor is led Item 2 is pressed into conducting bar slot 7 (rotor bar 2 can be irregular shape, be not limited to cylinder), and rotor bar 2 is adopted with conducting bar slot 7 With the fit system of interference, magnitude of interference 0.01-0.03mm, purpose is protected to completely attach to rotor bar 2 and conducting bar slot 7 Card electric current can form circulation in the short stream ring 3- rotor bar 2 of rotor bar 2-, subsequent that multiple nuts is recycled to carry out second It is secondary that fixation is bolted, first is that promote to contact between rotor bar 2 and short stream ring 3 it is closer, second is that making the assembled one of built-up rotor Change, a kind of built-up rotor of good quality is provided, promotes rotor reliability of operation.Rotor bar 2 occur bubble, When the technological problems of stomata, one group of new rotor bar 2 can be replaced in time, utmostly avoid traditional cast-aluminum rotor and occur The problem of overhauling is not easy when aluminum process defect.
Above-mentioned rotor assembly through the invention can effectively improve the performance level of industrial motor, reduce rotor set The loss of part entirety to improve product competitiveness, while facilitating the disassembly of motor rotor component components, is convenient for motor The detection and analysis of failure.
According to an embodiment of the invention, motor includes rotor, which is above-mentioned rotor.
Those skilled in the art will readily recognize that above-mentioned each advantageous manner can be free under the premise of not conflicting Ground combination, superposition.
The above is merely preferred embodiments of the present invention, be not intended to limit the invention, it is all in spirit of the invention and Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within principle.Above only It is the preferred embodiment of the present invention, it is noted that for those skilled in the art, do not departing from this hair Under the premise of bright technical principle, several improvements and modifications can also be made, these improvements and modifications also should be regarded as guarantor of the invention Protect range.

Claims (13)

1. a kind of rotor assembly, which is characterized in that including rotor core (1), rotor bar (2) and short stream ring (3), the rotor Conducting bar (2) is removably disposed on the rotor core (1) along the circumferential direction of the rotor core (1), and the short stream ring (3) sets The both ends in the rotor core (1) are set, and the rotor bar (2) is fixed on the rotor core (1).
2. rotor assembly according to claim 1, which is characterized in that on the rotor core (1) it is circumferentially arranged have it is more A cage grooves (4), the rotor bar (2) are removably disposed in the cage grooves (4).
3. rotor assembly according to claim 2, which is characterized in that the section of the cage grooves (4) is round, ellipse Or polygon.
4. rotor assembly according to claim 3, which is characterized in that the section of the cage grooves (4) is circle, along institute The circumferential direction of rotor core (1) is stated, sectional area, diameter or the perimeter of the cage grooves (4) are distributed in sineization.
5. rotor assembly according to claim 1, which is characterized in that be provided with fixation hole on the rotor core (1) (5), it is equipped with screw rod (6) in the fixation hole (5), the short stream ring (3) is fixed on the rotor iron by the screw rod (6) On core (1).
6. rotor assembly according to claim 1, which is characterized in that the short stream ring (3) is towards the rotor core (1) One end be provided with conducting bar slot (7), the rotor bar (2) is arranged in correspondingly in the conducting bar slot (7).
7. rotor assembly according to claim 6, which is characterized in that the rotor bar (2) and the conducting bar slot (7) it Between for interference fit.
8. rotor assembly according to claim 7, which is characterized in that the rotor bar (2) and the conducting bar slot (7) it Between magnitude of interference be 0.01-0.03mm.
9. rotor assembly according to claim 1, which is characterized in that the short stream ring (3) is far from the rotor core (1) One end be provided with fan blade (8).
10. rotor assembly according to claim 6, which is characterized in that the fan blade (8) is removably disposed in described short On the end face for flowing ring (3).
11. rotor assembly according to any one of claim 1 to 10, which is characterized in that the rotor bar (2) applies outside It is covered with insulating layer.
12. rotor assembly according to any one of claim 1 to 10, which is characterized in that the short stream ring (3) and/or Rotor bar (2) is made of copper product.
13. a kind of motor, including rotor, which is characterized in that the rotor is motor described in claim 1 to 12 Rotor.
CN201810983459.6A 2018-08-27 2018-08-27 Rotor assembly and motor Pending CN109067033A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810983459.6A CN109067033A (en) 2018-08-27 2018-08-27 Rotor assembly and motor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810983459.6A CN109067033A (en) 2018-08-27 2018-08-27 Rotor assembly and motor

Publications (1)

Publication Number Publication Date
CN109067033A true CN109067033A (en) 2018-12-21

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810983459.6A Pending CN109067033A (en) 2018-08-27 2018-08-27 Rotor assembly and motor

Country Status (1)

Country Link
CN (1) CN109067033A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112600322A (en) * 2020-11-16 2021-04-02 超音速智能技术(杭州)有限公司 Small-size motor closed slot cast aluminum rotor

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07274457A (en) * 1994-03-30 1995-10-20 Kusatsu Denki Kk Squirrel-cage type rotor
CN201312153Y (en) * 2008-11-07 2009-09-16 安徽皖南电机股份有限公司 Novel motor rotor structure
CN102055263A (en) * 2009-10-28 2011-05-11 珠海格力电器股份有限公司 Compressor, motor rotor for compressor and manufacturing method of rotor
CN205986377U (en) * 2016-08-17 2017-02-22 国电联合动力技术有限公司 Squirrel -cage induction machine's rotor squirrel cage structure
CN207518454U (en) * 2017-12-01 2018-06-19 肇庆市东菱机电设备有限公司 A kind of squirrel-cage copper rotor motor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07274457A (en) * 1994-03-30 1995-10-20 Kusatsu Denki Kk Squirrel-cage type rotor
CN201312153Y (en) * 2008-11-07 2009-09-16 安徽皖南电机股份有限公司 Novel motor rotor structure
CN102055263A (en) * 2009-10-28 2011-05-11 珠海格力电器股份有限公司 Compressor, motor rotor for compressor and manufacturing method of rotor
CN205986377U (en) * 2016-08-17 2017-02-22 国电联合动力技术有限公司 Squirrel -cage induction machine's rotor squirrel cage structure
CN207518454U (en) * 2017-12-01 2018-06-19 肇庆市东菱机电设备有限公司 A kind of squirrel-cage copper rotor motor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112600322A (en) * 2020-11-16 2021-04-02 超音速智能技术(杭州)有限公司 Small-size motor closed slot cast aluminum rotor

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Application publication date: 20181221