CN203942379U - The anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor - Google Patents
The anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor Download PDFInfo
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- CN203942379U CN203942379U CN201420361229.3U CN201420361229U CN203942379U CN 203942379 U CN203942379 U CN 203942379U CN 201420361229 U CN201420361229 U CN 201420361229U CN 203942379 U CN203942379 U CN 203942379U
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- bearing
- carrier ring
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- insulating
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Abstract
The utility model discloses the anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor, it is characterized in that, comprise end cap, end cap below inner ring is provided with insulating bearing carrier ring, insulating bearing carrier ring below is provided with bearing, the both sides of bearing are respectively equipped with bearing end cover and internal bearing cover, and bearing end cover inner side is provided with wavy spring sheet, between a side of insulating bearing carrier ring and bearing and wavy spring sheet, is provided with insulation board.The utility model reliability is high, simple in structure; can effectively cut off shaft current loop; prevent the generation of bearing shaft electric current; in the time of protection bearing, prevent that shaft current from burning out main shaft and bearing; affect unit safety operation; and insulating bearing carrier ring and insulation board separation design; there is the convenient advantages such as replacing and maintenance of installing; improved bearing performance; reduced cost; and convenient and practical, can be widely used in bearing insulation to have the middle and small motor of specific (special) requirements, on particularly 2 hypervelocity variable-frequency motors manufacture and design.
Description
Technical field
The utility model relates to the anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor, belongs to electrical machinery part field.
Background technology
AC asynchronous motor is moved under sinusoidal alternating voltage, and its rotor is in sine alternating magnetic field.Due to factor impacts such as electric machine rotor segmental punching, silicon steel plate stacking and core slots, ventilation holes, easily produce unbalanced magnetic resistance.When electric machine stator iron circumferencial direction magnetic resistance is unbalanced, can produce the rotating magnetic flux with rotating shaft intersecting chain, with magnetic pole, be rotated in rotating shaft two ends and induce electromotive force, by main shaft, bearing, end cap, support, form closed-loop path, produce shaft current.The electric discharge phenomena that shaft current produces, can make bearing inner sleeve produce pit, between bearing and rotor, frictional resistance increases, bearing temperature rises, when serious, motor-shaft extending end bearing can be subjected to displacement, cause rotor shaft extension end and non-shaft stretching end decentraction, bearing radial force is uneven, and then affects the safe operation of bearing and whole unit.
The measure of existing reply shaft current is to the bearing isolation of insulating, as select suitable insulation bearing, select suitable insulation bearing chamber etc., the former generally uses plasma spraying or ceramic material paint-on technique, although there is excellent current impedance ability, but specification is little, expensive, and integrated cost is higher; Also there is the easy damage problem of insulation in the latter, is unfavorable for maintaining.
Summary of the invention
The technical problems to be solved in the utility model is: provide that a kind of reliability is high, simple in structure, cost is low, installed and change and the anti-shaft current seal of 2 hypervelocity variable-frequency motor easy to maintenance, the electric discharge phenomena that shaft current produces have been solved, prevent from affecting the safe operation of bearing and whole unit, and existingly bearing is insulated to isolation integrated cost is higher, the problem that is unfavorable for maintaining.
In order to solve the problems of the technologies described above, the technical solution of the utility model has been to provide the anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor, it is characterized in that, comprise end cap, end cap below inner ring is provided with insulating bearing carrier ring, and insulating bearing carrier ring below is provided with bearing, and the both sides of bearing are respectively equipped with bearing end cover and internal bearing cover, bearing end cover inner side is provided with wavy spring sheet, between a side of insulating bearing carrier ring and bearing and wavy spring sheet, is provided with insulation board.
Preferably, the shaft extension end section of described insulating bearing carrier ring is rectangular; The non-shaft stretching end section of insulating bearing carrier ring is L-type.
Preferably, described insulating bearing carrier ring outer surface is provided with dielectric film.
Preferably, the one-sided thick 0.2mm～0.5mm of described dielectric film.
Preferably, between described insulation board and insulating bearing carrier ring, leave the gap surplus of 0.3mm～1.0mm.
Preferably, described insulation bearing Analysis of Nested Design width is than the little 0.3mm～1.0mm of nominal bearing width.
The utility model reliability is high, simple in structure, by assembling suitable insulating bearing carrier ring and insulation board, guarantee that bearing has insulation property, can effectively cut off shaft current loop, prevent the generation of bearing shaft electric current, in the time of protection bearing, prevent that shaft current from burning out main shaft and bearing, affect unit safety operation, and insulating bearing carrier ring and insulation board separation design, there is the convenient advantages such as replacing and maintenance of installing, improved bearing performance, reduced cost, and convenient and practical, can be widely used in bearing insulation to have the middle and small motor of specific (special) requirements, on particularly 2 hypervelocity variable-frequency motors manufacture and design.
Accompanying drawing explanation
Fig. 1 is the structural representation of the shaft extension end section of the anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor;
Fig. 2 is the structural representation of the non-shaft stretching end section of the anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor.
Wherein: 1, bearing end cover; 2, wavy spring sheet; 3, insulation board; 4, end cap; 5, internal bearing cover; 6, insulating bearing carrier ring; 7, bearing; 8, rotating shaft.
Embodiment
For the utility model is become apparent, hereby with preferred embodiment, and coordinate accompanying drawing to be described in detail below.
Embodiment 1
The utility model is the anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor, and as shown in Figure 1, it comprises that the parts such as end cap 4, bearing end cover 1, wavy spring sheet 2, insulating bearing carrier ring 6, insulation board 3 form.
Motor-shaft extending end and non-shaft stretching end all adopt single deep groove ball bearing structure, end cap 4 below inner rings are provided with insulating bearing carrier ring 6, and (shaft extension end section is rectangular as shown in Figure 1, non-shaft stretching end section is L-type as shown in Figure 2, there is positioning action), insulating bearing carrier ring 6 outer surfaces are done Teflon insulation processing, form dielectric film, the one-sided thick 0.2mm～0.5mm of this dielectric film, do hot jacket with end cap 4 and coordinate, when it is back to room temperature, remake last processing.
Shaft extension end bearing enclosing cover 1 inner side is provided with wavy spring sheet 2, between wavy spring sheet 2 and bearing 7, with insulation board 3 (epoxy fabric swatch), isolates.There are respectively bearing end cover 1 and internal bearing cover 5 in the both sides of bearing 7, and bearing end cover 1 and internal bearing cover 5 are installed in rotating shaft 8.Insulating bearing carrier ring 6 design width, than the little 0.3mm～1.0mm of bearing 7 nominal width, after being also bearing assemble, leave the gap surplus of 0.3mm～1.0mm, simultaneously insulation board 3 and bearing 7 close contacts between insulation board 3 and insulating bearing carrier ring 6.Acting as of this design: due to factor impacts such as assembly technologies, when motor runs well, axial endplay may occur bearing.The gap surplus of the 0.3mm～1.0mm leaving between insulation board 3 cylindricals and insulating bearing carrier ring 6, non-close contact, can make wavy spring sheet 2 produce and act on the unidirectional pretightning force on insulation board 3, by insulation board 3 inner circles, transmit always and act on bearing 7 sides, make bearing be unlikely to occur axial endplay; If do not stay gap, insulation board 3 cylindricals and insulating bearing carrier ring 6 closely cooperate, and wavy spring sheet 2 cannot produce unidirectional pretightning force effect to bearing 7 by insulation board 3 inner circles.
Combined treatment by above insulating bearing carrier ring 6 with insulation board 3, can make the isolation of insulating of bearing 7 and end cap 4, internal bearing cover 5, bearing end cover 1, more than insulation resistance reaches 10M Ω, because shaft voltage generally only has 1～5V, now motor shaft electric current is very little, can ignore, and can reach the effect of isolated shaft current, effectively cut off shaft current and produce loop, improved the degree of safety of bearing operation.
Claims (6)
1. the anti-shaft current seal of hypervelocity variable-frequency motor, it is characterized in that, comprise end cap (4), end cap (4) below inner ring is provided with insulating bearing carrier ring (6), insulating bearing carrier ring (6) below is provided with bearing (7), the both sides of bearing (7) are respectively equipped with bearing end cover (1) and internal bearing cover (5), bearing end cover (1) inner side is provided with wavy spring sheet (2), between a side of insulating bearing carrier ring (6) and bearing (7) and wavy spring sheet (2), is provided with insulation board (3).
2. the anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor as claimed in claim 1, is characterized in that, the shaft extension end section of described insulating bearing carrier ring (6) is rectangular; The non-shaft stretching end section of insulating bearing carrier ring (6) is L-type.
3. the anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor as claimed in claim 1, is characterized in that, described insulating bearing carrier ring (6) outer surface is provided with dielectric film.
4. the anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor as claimed in claim 3, is characterized in that, the one-sided thick 0.2mm～0.5mm of described dielectric film.
5. the anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor as claimed in claim 1, is characterized in that, leaves the gap surplus of 0.3mm～1.0mm between described insulation board (3) and insulating bearing carrier ring (6).
6. the anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor as claimed in claim 1, is characterized in that, described insulating bearing carrier ring (6) design width is than the little 0.3mm～1.0mm of bearing (7) nominal width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420361229.3U CN203942379U (en) | 2014-07-01 | 2014-07-01 | The anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420361229.3U CN203942379U (en) | 2014-07-01 | 2014-07-01 | The anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203942379U true CN203942379U (en) | 2014-11-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420361229.3U Active CN203942379U (en) | 2014-07-01 | 2014-07-01 | The anti-shaft current seal of a kind of 2 hypervelocity variable-frequency motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203942379U (en) |
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2014
- 2014-07-01 CN CN201420361229.3U patent/CN203942379U/en active Active
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |