CN103312074B - Motor rotor, motor with same and manufacturing method of motor rotor - Google Patents
Motor rotor, motor with same and manufacturing method of motor rotor Download PDFInfo
- Publication number
- CN103312074B CN103312074B CN201210058179.7A CN201210058179A CN103312074B CN 103312074 B CN103312074 B CN 103312074B CN 201210058179 A CN201210058179 A CN 201210058179A CN 103312074 B CN103312074 B CN 103312074B
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- Prior art keywords
- insulating sleeve
- motor
- rotor
- base substrate
- bearing
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 18
- 239000000758 substrate Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 17
- 238000009413 insulation Methods 0.000 claims description 15
- 238000012545 processing Methods 0.000 claims description 6
- FGUUSXIOTUKUDN-IBGZPJMESA-N C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 Chemical compound C1(=CC=CC=C1)N1C2=C(NC([C@H](C1)NC=1OC(=NN=1)C1=CC=CC=C1)=O)C=CC=C2 FGUUSXIOTUKUDN-IBGZPJMESA-N 0.000 claims description 3
- 230000002146 bilateral effect Effects 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000010891 electric arc Methods 0.000 abstract description 6
- 231100000241 scar Toxicity 0.000 abstract description 6
- 238000012423 maintenance Methods 0.000 abstract description 4
- 208000032544 Cicatrix Diseases 0.000 abstract 1
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000037387 scars Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 8
- 230000005611 electricity Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000007423 decrease Effects 0.000 description 3
- 239000004744 fabric Substances 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 3
- 239000004810 polytetrafluoroethylene Substances 0.000 description 3
- 238000007711 solidification Methods 0.000 description 3
- 230000008023 solidification Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- -1 polytetrafluoroethylene Polymers 0.000 description 2
- 229910000897 Babbitt (metal) Inorganic materials 0.000 description 1
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical compound FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Manufacture Of Motors, Generators (AREA)
- Motor Or Generator Frames (AREA)
Abstract
The invention provides a motor rotor, a motor with the motor rotor and a manufacturing method of the motor rotor. The motor rotor comprises a bearing end supported by a motor bearing (6), and further comprises an insulating sleeve (7) fixedly sleeved on the periphery of the bearing end. According to the motor rotor and the motor with the motor rotor, strip-shaped electric arc scars on the inner surface of a motor bearing due to shaft current can be effectively prevented; and the service life of the motor bearing is prolonged, the safety production is facilitated, and the operation and maintenance cost of the motor is reduced.
Description
Technical field
The present invention relates to machine field, more particularly, to a kind of rotor, there is its motor and the system of rotor
Make method.
Background technology
According to electric machine structure and operation principle, due to stator core combinated seam, stator silicon steel sheet seam, gas between stator and rotor
Gap is uneven, and axle center is inconsistent with magnetic field center, and the main shaft of motor is inevitably in the magnetic field of a non complete symmetry
Middle rotation.So, an alternating voltage will be produced at axle two ends.Require unit rotating part insulation against ground electricity under normal circumstances
Resistance is more than 2M Ω, if ground connection is it is possible to produce shaft current big axle two ends while.
In motor operation course, if there being the existence of shaft current between two bearings end or machine shaft and bearing, then for electricity
The service life of machine bearing will be greatly shortened.Slight runs thousands of hours, and serious even can only run several hours, gives
Site safety produces and brings great adverse effect.Simultaneously because the directly or indirectly economic loss that bearing damage and replacing bring is also
Can't neglect.
Under normal circumstances, between machine shaft and bearing, there is the existence of lubricating oil film, play the effect of insulation.For relatively low axle electricity
Pressure, this layer of lubricating oil film remains to protect its insulating properties, will not produce shaft current.But when shaft voltage increases to certain numerical value,
Especially when motor start-up, the lubricating oil film in bearing is the most stably formed, and shaft voltage will puncture oil film and discharge, and constitute back
Road, shaft current will be passed through from the metal contact of bearing and rotating shaft, owing to this metal contact is the least, so the electric current of these points
Density is big, produces high temperature in moment, makes bearing local scorification, is splashed by the bearing metal of scorification under the effect of grinding pressure, in
It is on bearing inner surface, burn small rut.Normally due to high than bearing burning out alloy of rotating shaft hardness and mechanical strength, usual table
Revealing the symptom come is that bearing inner surface is forced out strip electric arc scar.Therefore, for avoiding the generation of this kind of situation, need to be by motor
Design bearing is the structure of insulation bearing.
The basic reason formed for shaft current, the scheme that general insulation bearing uses has two kinds: (1) is inside bearing or turns
Be coated with one layer of insulant on son, but this to the anti-wear performance of material, insulating properties, stability requirement the highest, and absolutely
The cost of edge material is the highest；(2) between bearing and rear end cap, increase one layer of insulating sleeve, but bearing need radially fixed,
Then being equivalent to according to steel screw is fixing and constitutes closed-loop path, according to insulated screw, and general insulated screw intensity is all
It not the highest.Therefore this two schemes has the limitation that it is certain.
Summary of the invention
Present invention aim at providing one can prevent motor bearings inner surface from strip electric arc scar occurring, improves motor bearings use
The rotor in life-span, there is its motor and the manufacture method of rotor.
The invention provides a kind of rotor, including the bearing end supported by motor bearings, also include insulating sleeve, regularly
It is sheathed on the periphery of bearing end.
Further, the insulation resistance of insulating sleeve is more than 2M Ω.
Further, the thickness of insulating sleeve is between 1 to 2mm.
Further, insulating sleeve is that the filled polytetrafluoroethylene collar, the epoxy fabric swatch collar or solidification are without the latitude band collar.
Present invention also offers a kind of motor, including motor stator, be positioned at the rotor within motor stator, supporting motor turns
The motor bearings of son, rotor is aforesaid rotor, and motor bearings is bearing in the periphery of the insulating sleeve of rotor.
Present invention also offers the manufacture method of a kind of rotor, comprise the steps: that step a. processes insulating sleeve base substrate；Step
Insulating sleeve base substrate is heated by rapid b.；Insulating sleeve base substrate after heating is assemblied in motor by step c. in an interference fit
The bearing end of rotor.
Further, after step c, manufacture method also includes: after the insulating sleeve base substrate cooling that step d. assembles, sentence
Break off whether there is relative motion between edge sleeve blank and the bearing end of rotor；Step e. by with the bearing end of rotor without
The insulating sleeve base substrate of relative motion is finish-machined to insulating sleeve.
Further, after step e, manufacture method also includes: step f. measures the insulation resistance of insulating sleeve, works as insulation
When resistance is more than 2M Ω, it is determined that insulating sleeve is up-to-standard.
Further, in step a, the thickness of the insulating sleeve base substrate of processing is 4 to 6mm；The insulation formed in step e
The thickness of sleeve is between 1 to 2mm.
Further, in stepb insulating sleeve base substrate is heated to 45～60 DEG C.
Further, in stepb insulating sleeve idiosome is heated to 50 DEG C.
Further, in step c the bilateral magnitude of interference of interference fit between 0.10 to 0.15mm.
According to the rotor of the present invention, owing to the bearing end at rotor arranges insulating sleeve, make rotor and motor shaft
Electrically insulate between holding, the strip electric arc scar that motor bearings inner surface occurs because of shaft current can be effectively prevented.Improve motor
In the service life of bearing, it is beneficial to safety in production, decreases operation and the maintenance cost of motor.
Accompanying drawing explanation
The accompanying drawing of the part constituting the application is used for providing a further understanding of the present invention, the illustrative examples of the present invention and
Its explanation is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the part-structure schematic diagram of the motor according to the present invention and rotor thereof；
Fig. 2 is the A portion structure for amplifying schematic diagram of Fig. 1.
Detailed description of the invention
Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.It should be noted that in the case of not conflicting,
Embodiment in the application and the feature in embodiment can be mutually combined.
As Fig. 1 is to shown in 2, and the motor of the present embodiment mainly includes rotor 1, motor stator 2, electric machine casing 3, oil resistance
Seal 4, back end cover for motor 5, motor bearings 6 and insulating sleeve 7.It is outside that motor stator 2 is sheathed on rotor 1；Motor
Housing 3 is set in the outside of motor stator 2；Back end cover for motor 5 is covered on rearward end the supporting motor bearing 6 of electric machine casing 3.
Rotor 1 includes the bearing end being positioned at its end, and insulating sleeve 7 is set in the periphery of bearing end regularly, and motor bearings 6
It is bearing in the periphery of insulating sleeve 7.Owing to being provided with insulating sleeve 7 at the bearing end of rotor 1, make rotor 1 and electricity
Electrically insulate between machine bearing 6, cut off the loop of shaft current, thus the inner surface of motor bearings 6 can be effectively prevented because of axle electricity
The strip electric arc scar flowed and occur, this is greatly improved the service life of motor bearings 6, is beneficial to safety in production, decreases electricity
The operation of machine and maintenance cost.
The set that insulating sleeve 7 can be made up without materials such as latitude bands of filled polytetrafluoroethylene (PTFE), epoxy fabric swatch or solidification
Ring.Collar material listed above, has high rigidity, corrosion-resistant, ageing-resistant, the preferable feature of high-low temperature resistant, insulating properties.
The thickness (monolateral) of insulating sleeve 7 may select between 1-2mm.If insulating sleeve 7 is blocked up, then do not changing motor shaft
Hold in the case of the internal diameter of 6 certainly will rotor outside dimension be reduced, so can affect the rigidity of rotor 1 and critical turn
Speed.Therefore, as long as ensureing insulation and the stability of insulating sleeve, insulating sleeve 7 is without the thickest.According to the requirement of F grade,
The insulation resistance of insulating sleeve 7 can meet insulating requirements more than 2M Ω.
Insulating sleeve 7 is fixed on the bearing end of rotor 1, need to ensure this insulating sleeve 7 can not and rotor 1 between send out
Life relatively rotates or relative movement.This can ensure in the way of taking hot jacket installation.The manufacturer of the rotor of the present embodiment
Method is as follows:
Step a. processing insulating sleeve base substrate.Owing to after hot charging, insulating sleeve can deform and causes axiality bigger than normal, at electricity
Being easy to have an accident during machine rotor high speed rotating, therefore, the insulating sleeve base substrate before hot charging need to stay certain surplus.Insulation
The thickness of sleeve blank can be fabricated to 4 to 6mm, and preferably at about 5mm, insulating sleeve base substrate is the thinnest, adds man-hour variable
Shape, the thickest, the waste that material and process time etc. are unnecessary can be caused.The material of processing insulating sleeve base substrate can be to fill to gather
Tetrafluoroethene, epoxy fabric swatch or solidification are without latitude band etc..
Insulating sleeve base substrate is heated by step b..According to insulating sleeve inside/outside diameter size, the coefficient of expansion of material and assembling thereof
Time the magnitude of interference between relation, insulating sleeve base substrate can be heated to 45～60 DEG C, it is preferable that be heated to by insulating sleeve base substrate
50℃。
Insulating sleeve base substrate after heating is assemblied in the bearing end of rotor 1 by step c. in an interference fit.Interference is joined
The bilateral magnitude of interference closed is optimal between 0.10 to 0.15mm.
After the insulating sleeve base substrate cooling that step d. assembles, it is judged that between the bearing end of insulating sleeve base substrate and rotor 1 be
No there is relative motion.It is ensured that will not relatively rotate between insulating sleeve base substrate and rotor with mobile, could be entered next
Step.
Step e. will be finish-machined to insulating sleeve 7 with the bearing end of rotor 1 without the insulating sleeve base substrate of relative motion.Wherein
Finishing step may include that the insulating sleeve base substrate assembled is carried out rough turn by (1) upper lathe.To the insulating sleeve assembled
Base substrate when carrying out rough turn each depth of cut be preferably less than 0.5mm, otherwise the excessive insulating sleeve base substrate that is easily caused of cutting force comes off.
(2) the insulating sleeve base substrate after rough turn is refined by upper grinding machine.Preferably, the insulating sleeve 7 formed in this step e
Thickness is between 1 to 2mm.
The electric resistance measuring apparatus such as step f. insulating megger measure the insulation resistance of insulating sleeve 7, according to F class requirement, when absolutely
When edge resistance is more than 2M Ω, it is determined that insulating sleeve 7 is up-to-standard.
The motor of the present invention is suitable for but is not limited in the centrifugal compressor of field of air conditioning use.
As can be seen from the above description, the above embodiments of the present invention achieve following technique effect: due at rotor
Bearing end insulating sleeve is set, make between rotor and motor bearings electrically insulate, motor bearings inner surface can be effectively prevented
The strip electric arc scar occurred because of shaft current.The service life of motor bearings is greatly improved, is beneficial to safety in production, decreases
The operation of motor and maintenance cost.And no matter this insulating sleeve is from material cost, or processing cost is all than conventional structure side
Formula has higher advantage, and assembles the most very convenient.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for those skilled in the art
For, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of being made, etc.
With replacement, improvement etc., should be included within the scope of the present invention.
Claims (6)
1. the manufacture method of a rotor, it is characterised in that comprise the steps:
Step a. processing insulating sleeve base substrate；
Described insulating sleeve base substrate is heated by step b.；
Described insulating sleeve base substrate after heating is assemblied in the axle of described rotor by step c. in an interference fit
Socket end, described bearing end is positioned at the end of described rotor, described insulating sleeve base substrate be positioned at motor bearings and rotor it
Between；
After the described insulating sleeve base substrate cooling that step d. assembles, it is judged that described insulating sleeve base substrate and described rotor
Bearing end between whether there is relative motion；
Step e. will be finish-machined to insulate without the described insulating sleeve base substrate of relative motion with the bearing end of described rotor
Sleeve.
Manufacture method the most according to claim 1, it is characterised in that after described step e, described manufacture method also includes:
Step f. measures the insulation resistance of described insulating sleeve, when insulation resistance is more than 2M Ω, it is determined that described insulation sleeve
Cylinder is up-to-standard.
Manufacture method the most according to claim 1 and 2, it is characterised in that
In described step a, the thickness of the described insulating sleeve base substrate of processing is 4 to 6mm；
Between the thickness of the described insulating sleeve formed in described step e is at 1 to 2mm.
Manufacture method the most according to claim 1 and 2, it is characterised in that by described insulating sleeve base in described step b
Body is heated to 45～60 DEG C.
Manufacture method the most according to claim 4, it is characterised in that in described step b, insulating sleeve idiosome is heated to
50℃。
Manufacture method the most according to claim 1 and 2, it is characterised in that interference fit is bilateral described in described step c
The magnitude of interference is between 0.10 to 0.15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210058179.7A CN103312074B (en) | 2012-03-06 | 2012-03-06 | Motor rotor, motor with same and manufacturing method of motor rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210058179.7A CN103312074B (en) | 2012-03-06 | 2012-03-06 | Motor rotor, motor with same and manufacturing method of motor rotor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103312074A CN103312074A (en) | 2013-09-18 |
| CN103312074B true CN103312074B (en) | 2016-08-24 |
Family
ID=49136966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210058179.7A Active CN103312074B (en) | 2012-03-06 | 2012-03-06 | Motor rotor, motor with same and manufacturing method of motor rotor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103312074B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN204190549U (en) * | 2014-10-23 | 2015-03-04 | 常州格力博有限公司 | Two insulation motor and pinion device |
| CN107528407A (en) * | 2016-06-20 | 2017-12-29 | 东方电气集团东方电机有限公司 | A kind of umbrella-type generator axle insulation system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202444365U (en) * | 2012-03-06 | 2012-09-19 | 珠海格力电器股份有限公司 | Motor rotor and motor with same |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5042246B2 (en) * | 2009-01-05 | 2012-10-03 | 三菱電機株式会社 | Electric motor rotor, electric motor, method of manufacturing electric motor rotor, and air conditioner |
| CN101692590B (en) * | 2009-08-10 | 2011-09-07 | 南阳防爆集团股份有限公司 | Motor insulating bearing device and manufacturing method thereof |
| NO2546958T3 (en) * | 2010-03-10 | 2018-03-17 | ||
| JP5005063B2 (en) * | 2010-05-07 | 2012-08-22 | 三菱電機株式会社 | Electric motor rotor, electric motor, method of manufacturing electric motor rotor, and air conditioner |
-
2012
- 2012-03-06 CN CN201210058179.7A patent/CN103312074B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202444365U (en) * | 2012-03-06 | 2012-09-19 | 珠海格力电器股份有限公司 | Motor rotor and motor with same |
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| Publication number | Publication date |
|---|---|
| CN103312074A (en) | 2013-09-18 |
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