CN203645477U - Motor shaft current eliminating device - Google Patents
Motor shaft current eliminating device Download PDFInfo
- Publication number
- CN203645477U CN203645477U CN201320780712.0U CN201320780712U CN203645477U CN 203645477 U CN203645477 U CN 203645477U CN 201320780712 U CN201320780712 U CN 201320780712U CN 203645477 U CN203645477 U CN 203645477U
- Authority
- CN
- China
- Prior art keywords
- motor
- carbon brush
- motor shaft
- rotor
- motor reel
- 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.)
- Expired - Lifetime
Links
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 29
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 29
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 claims description 7
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 3
- 229910052802 copper Inorganic materials 0.000 claims description 3
- 239000010949 copper Substances 0.000 claims description 3
- 230000006378 damage Effects 0.000 description 5
- 239000010687 lubricating oil Substances 0.000 description 3
- 241000239290 Araneae Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
Images
Landscapes
- Motor Or Generator Frames (AREA)
Abstract
The utility model provides a motor shaft current eliminating device. The device comprises a motor and a motor shaft arranged through the motor. The motor comprises a motor rotor arranged inside the motor and sleeving the motor shaft, and a motor stator arranged outside the motor rotor. Both ends of the motor shaft protrude out of the motor and are equipped with sliding bearings. Lower sides of the sliding bearings are connected to the ground via bearing pedestals. One side of the motor shaft that protrudes out of the motor is equipped with a rotor slip ring, and the other side is equipped with a grounded current guiding device. The grounded current guiding device includes a carbon brush holder arranged on an end portion of the motor shaft, carbon brushes arranged on the carbon brush holder, and a grounding wire connecting the carbon brushes and the ground. Compared to the prior art, the device is simple in structure, easy to use, smart in idea, and high in practicality. The device can extend the service lives of the bearings on two sides of the motor shaft. Thus the device is easy to promote.
Description
Technical field
The utility model relates to motor technology field, relates in particular to a kind of simple in structure, motor reel current eliminating device.
Background technology
When motor uses transducer drive, between motor rotor shaft two ends, axle and bearing, can produce the voltage that is referred to as shaft voltage.During with transducer drive, because output waveform contains high order harmonic component composition, its impact is increased, and the proportional increase along with operating frequency.If shaft voltage exceedes the value that bearing allows, can discharge or conduct electricity by oil film, axle and bearing are damaged.Shaft voltage is because the reason such as imbalance and electrostatic induction of magnetic circuit produces, the ability that sliding bearing bears voltage is 300-500mv, and the motor that power exceedes 200-500KW while carrying out the operating mode of speed governing running by transducer drive its shaft voltage can reach 50V, the ability that is far longer than sliding bearing and bears voltage.
Taking the motor of motor model YR500-12/1180 as example, stator voltage 6000V, rotor voltage 673V, power 500KW, rotor bearing is sliding bearing.Originally use rotor resistance speed governing, when power frequency operation, the shaft voltage of motor does not cause damage to sliding bearing.And transform as after rotor-side variable frequency driving from 2007, the sliding bearing of motor in use occurs that bearing shell is burnt, lubricating oil is contaminated continuously, bearing temperature rise is crossed high situation.Find that through detecting motor when operation shaft voltage reaches 40-50V unexpectedly, electric current reaches 80mA, considerably beyond the sliding bearing ability of bearing voltage, is to cause bearing shell burn, lubricating oil contaminated, the reason that bearing temperature rise is too high.For addressing this problem, reduce the harm of shaft voltage to motor, need a kind of device of eliminating shaft voltage, normally move with the safety that ensures motor.
Summary of the invention
Technical assignment of the present utility model is to solve the deficiencies in the prior art, and a kind of simple in structure, the motor reel current eliminating device that can eliminate shaft voltage is provided.
The technical solution of the utility model is, a kind of motor reel current eliminating device, comprise motor, cross-under is arranged on the motor reel in motor, described motor comprises and is arranged on inside and is socketed in the rotor on motor reel, be arranged on the motor stator in rotor outside, the two ends of above-mentioned motor reel are all stretched out motor and sliding bearing are all installed, the downside of this sliding bearing is connected with ground by bearing pedestal, the side socket that described motor reel stretches out motor is provided with rotor ring, the opposite side that stretches out motor is provided with ground connection drainage system, this ground connection drainage system comprises the carbon brush holder that is arranged on motor reel end, be arranged on the carbon brush on carbon brush holder, connect the earth lead on carbon brush and ground.
In technique scheme, at motor output shaft end, a carbon brush holder is installed, carbon brush is installed on carbon brush holder, carbon brush is closely connected with motor reel, uses earth lead that carbon brush is connected with Earth Phase, and earth resistance must not be greater than 1 ohm.Ensure that motor reel current potential in the time that motor moves is zero potential, can guide the electrostatic charge on motor shaft into the earth at any time, eliminate shaft current with this, play the effect that prevents shaft current harm.
As preferably, the carbon brush on described carbon brush holder is at least provided with two.
Further, described earth lead is copper cash, and its sectional area is 4 square millimeters.
As preferably, the junction on described bearing pedestal and ground is provided with insulating pad.
In sum, the beneficial effect that the utility model compared with prior art produced is:
The features such as that motor reel current eliminating device of the present utility model has is simple in structure, easy to use, be skillfully constructed, stable performance, by an earthing device with excellent conductive performance is installed, the shaft voltage producing when this device is moved motor is drained to the earth, shaft voltage is no longer discharged over the ground by the sliding bearing of motor output shaft end, effectively reduce the harm of shaft voltage to motor, practical, applied widely, be easy to promote.
Brief description of the drawings
Accompanying drawing 1 is structural representation of the present utility model.
Mark in accompanying drawing represents respectively:
1, motor, 1.1, rotor, 1.2, motor stator, 2, motor reel, 3, sliding bearing, 4, rotor ring, 5, bearing pedestal, 6, ground, 7, insulating pad, 8, ground connection drainage system, 8.1, carbon brush holder, 8.2, carbon brush, 8.3, earth lead.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of a kind of motor reel current eliminating device of the present utility model is described in detail below.
As shown in Figure 1, a kind of motor reel current eliminating device shown in the utility model, comprise motor 1, cross-under is arranged on the motor reel 2 in motor 1, described motor 1 comprises and is arranged on inside and is socketed in the rotor 1.1 on motor reel 2, be arranged on the motor stator 1.2 in rotor 1.1 outsides, the two ends of above-mentioned motor reel 2 are all stretched out motor 1 and sliding bearing 3 are all installed, the downside of this sliding bearing 3 is connected with ground 6 by bearing pedestal 5, the side socket that described motor reel 2 stretches out motor 1 is provided with rotor ring 4, the opposite side that stretches out motor 1 is provided with ground connection drainage system 8, this ground connection drainage system 8 comprises the carbon brush holder 8.1 that is arranged on motor reel 2 ends, be arranged on the carbon brush 8.2 on carbon brush holder 8.1, connect the earth lead 8.3 on carbon brush 8.2 and ground.
Carbon brush 8.2 on described carbon brush holder 8.1 is at least provided with two.
Described earth lead 8.3 is copper cash, and its sectional area is 4 square millimeters.
Described bearing pedestal 5 is provided with insulating pad 7 with the junction on ground.
The shaft voltage that motor 1 produces in the time of frequency conversion drive is along the direction of arrow shown in the drawings, and by motor rotor shaft, i.e. motor reel 2 arrives the earth through bearing spider again after the sliding bearing of output shaft end.At this moment, the electric current that shaft voltage produces when by sliding bearing can reach 80mA, if uneasy attaching ground drainage system is enough to sliding bearing to cause damage.Install after this ground connection drainage system, by wire, electric current is directly arrived to the earth, no longer by sliding bearing, thereby avoided the infringement of shaft voltage to sliding bearing.After installation, avoid that sliding bearing burn, lubricating oil are contaminated, bearing temperature rise is crossed high situation and occurred.
Except the technical characterictic described in specification, be the known technology of those skilled in the art.
Claims (4)
1. a motor reel current eliminating device, comprise motor, cross-under is arranged on the motor reel in motor, described motor comprises and is arranged on inside and is socketed in the rotor on motor reel, be arranged on the motor stator in rotor outside, the two ends of above-mentioned motor reel are all stretched out motor and sliding bearing are all installed, the downside of this sliding bearing is connected with ground by bearing pedestal, it is characterized in that: the side socket that described motor reel stretches out motor is provided with rotor ring, the opposite side that stretches out motor is provided with ground connection drainage system, this ground connection drainage system comprises the carbon brush holder that is arranged on motor reel end, be arranged on the carbon brush on carbon brush holder, connect the earth lead on carbon brush and ground.
2. a kind of motor reel current eliminating device according to claim 1, is characterized in that: the carbon brush on described carbon brush holder is at least provided with two.
3. a kind of motor reel current eliminating device according to claim 1, is characterized in that: described earth lead is copper cash, its sectional area is 4 square millimeters.
4. a kind of motor reel current eliminating device according to claim 1, is characterized in that: the junction on described bearing pedestal and ground is provided with insulating pad.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780712.0U CN203645477U (en) | 2013-12-03 | 2013-12-03 | Motor shaft current eliminating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320780712.0U CN203645477U (en) | 2013-12-03 | 2013-12-03 | Motor shaft current eliminating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203645477U true CN203645477U (en) | 2014-06-11 |
Family
ID=50876696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320780712.0U Expired - Lifetime CN203645477U (en) | 2013-12-03 | 2013-12-03 | Motor shaft current eliminating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203645477U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730988A (en) * | 2013-12-03 | 2014-04-16 | 山东金阳矿业集团有限公司 | Motor shaft current removing device |
| 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
- 2013-12-03 CN CN201320780712.0U patent/CN203645477U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103730988A (en) * | 2013-12-03 | 2014-04-16 | 山东金阳矿业集团有限公司 | Motor shaft current removing device |
| 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 | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140611 |
|
| CX01 | Expiry of patent term |