CN203206067U - Variable frequency motor non-transmission side bearing protective device - Google Patents
Variable frequency motor non-transmission side bearing protective device Download PDFInfo
- Publication number
- CN203206067U CN203206067U CN2013201518593U CN201320151859U CN203206067U CN 203206067 U CN203206067 U CN 203206067U CN 2013201518593 U CN2013201518593 U CN 2013201518593U CN 201320151859 U CN201320151859 U CN 201320151859U CN 203206067 U CN203206067 U CN 203206067U
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- transmission side
- side bearing
- brush
- electric
- frequency motor
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Abstract
The utility model discloses a variable frequency motor non-transmission side bearing protective device, comprising an electric brush assembly which comprises an electric brush and an electric brush mounting rack. The electric brush mounting rack is in connection with a motor end cover through motor end cover installing holes; the electric brush is installed on the electric mounting rack. The variable frequency motor non-transmission side bearing protective device avoids frequent damage of a non-transmission side bearing caused by shaft current, prolongs the service life of the bearing, raises equipment safety performance and reduces production accident generation frequency.
Description
Technical field
The utility model belongs to the protection equipment of variable-frequency motor, and concrete is the non-transmission side bearing protection device of a kind of variable-frequency motor.
Background technology
Steel rolling production-line main transmission alternating-current variable frequency motor in use, the problem of non-transmission side damage of bearings often can occur, bearing short then 2-3 in useful life month, long also only has six months, when the main cause of the non-transmission side damage of bearings of motor was the three phase electric machine frequency control, the magnetic field in the current intelligence lower rotor part was uneven; There is harmonic wave in the converter plant power supply; The difference of rotor on making causes air gap irregular, so that the magnetic field in the rotor is uneven, above-mentioned factor all can cause motor when operation generation current in rotating shaft, this electric current forms the loop by bearing, and discharge ablation bearing enclose and rolling element cause damage of bearings.
Summary of the invention
Technical problem to be solved in the utility model provides the non-transmission side bearing protection device of a kind of variable-frequency motor; avoid non-transmission side bearing to damage frequently phenomenon because shaft current causes; improve the useful life of bearing and the security performance of equipment, reduce the production accident occurrence frequency.
The non-transmission side bearing protection device of a kind of variable-frequency motor of the utility model; it comprises brush assembly of electric, connecting axle; connecting axle is connected on the end face of rotor shaft; brush assembly of electric comprises brush and brush installing rack; the brush installing rack is enclosed within on the connecting axle; and be connected with electric motor end cap by the electric motor end cap installing hole, brush is installed on the brush installing rack.
The non-transmission side bearing protection device of this novel a kind of variable-frequency motor also comprises ground cable, and ground cable one end connects brush, an end ground connection.
Adopt the utility model that the electric current on the rotor shaft is drawn, make electric current not form discharge loop with bearing, thereby avoided non-transmission side bearing to damage frequently phenomenon because shaft current causes, improved the useful life of bearing and the security performance of equipment, reduced the production accident occurrence frequency.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: 1, connecting axle 2, brush installing rack 3, brush 4, rotor shaft 5, bearing 6, ground cable 7, electric motor end cap.
Embodiment
Referring to accompanying drawing; the non-transmission side bearing protection device of this novel a kind of variable-frequency motor; it comprises brush assembly of electric, connecting axle 1; connecting axle 1 is connected on the end face of rotor shaft 4; brush assembly of electric comprises brush 3 and brush installing rack 2; brush installing rack 2 is enclosed within on the connecting axle 1, and is connected with electric motor end cap 7 by electric motor end cap 7 installing holes, and brush 3 is installed on the brush installing rack 2.
The non-transmission side bearing protection device of this novel a kind of variable-frequency motor also comprises ground cable 6, and ground cable 6 one ends connect brush 3, one end ground connection.
Adopt the utility model that the electric current on the rotor shaft 4 is drawn, make electric current not form discharge loop with bearing 5, thereby avoided non-transmission side bearing to damage frequently phenomenon because shaft current causes, improved the useful life of bearing and the security performance of equipment, reduced the production accident occurrence frequency.
Claims (2)
1. non-transmission side bearing protection device of variable-frequency motor; it is characterized in that: it comprises brush assembly of electric, connecting axle; connecting axle is connected on the end face of rotor shaft; brush assembly of electric comprises brush and brush installing rack; the brush installing rack is enclosed within on the connecting axle; and be connected with electric motor end cap by the electric motor end cap installing hole, brush is installed on the brush installing rack.
2. the non-transmission side bearing protection device of a kind of variable-frequency motor according to claim 1, it is characterized in that: it also comprises ground cable, ground cable one end connects brush, an end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201518593U CN203206067U (en) | 2013-03-29 | 2013-03-29 | Variable frequency motor non-transmission side bearing protective device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201518593U CN203206067U (en) | 2013-03-29 | 2013-03-29 | Variable frequency motor non-transmission side bearing protective device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203206067U true CN203206067U (en) | 2013-09-18 |
Family
ID=49150128
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013201518593U Expired - Fee Related CN203206067U (en) | 2013-03-29 | 2013-03-29 | Variable frequency motor non-transmission side bearing protective device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203206067U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108156830A (en) * | 2015-10-08 | 2018-06-12 | Abb瑞士股份有限公司 | Electric machine with a resonant circuit in the shaft connection |
-
2013
- 2013-03-29 CN CN2013201518593U patent/CN203206067U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108156830A (en) * | 2015-10-08 | 2018-06-12 | Abb瑞士股份有限公司 | Electric machine with a resonant circuit in the shaft connection |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130918 Termination date: 20210329 |