6218 /C3vl0241 Current Insulating Bearings

Model NO.
6218/C3VL0241
Payment
L/C, D/a, D/P, T/T, Western Union, Moneygram
Drawing
Avalibale
Delivery
7-35 Days
MOQ
1PCS
Certificate
ISO9001
Transport Package
Single Box
Specification
6218/C3VL0241
Trademark
MONTON
Origin
Luoyang
HS Code
8482102000
Production Capacity
1000PCS/Week
Reference Price
Please contact us for quote
Contact Us

Product Description

Name Current-Insulating Bearings
Brand MONTON
Model 6218/C3VL0241
d 90mm
D 160mm
D 30mm
Ring Material Gcr15/Special materail
Cage Material Brass cage
Load rating  dynamic 111 KN
Load rating  static 68 KN
Fatigue Limit Load Pu[kN] 2.75
Reference speed [r/min] 9500
Limiting speed [r/min] 6300
Sealed as customer requested
Weight 2.5KG
Design Structure Ball
Precision P5/P6 or as customer requested
Vibration ZV1, ZV2, ZV3, or  as customer requested
Clearance C0, C2, C3, or  as customer requested
Quality standard ISO9001: 2000/SGS
Package single box
Original Luoyang
Service OEM
Delivery date Accordingly
Application Threephase motor,Traction motor,Wind power generator

Insulated Insocoat bearings

Electric motors, generators and associated equipment are at risk when an electric current passes through their bearings. This can damage the contact surfaces of rolling elements and raceways in the bearings (electrical erosion) and rapidly degrade the grease. An additional risk in electric motors and generators comes from high frequency currents caused by the inherent stray capacitance. 

The risk of damage increases where the application uses a frequency converter.

Insulated Insocoat bearings are designed to prevent electric current from passing through the bearing have the external surfaces of either their inner or outer ring coated with an insulating aluminium oxide layer, by applying a sophisticated plasma-spray process for an outstanding quality finish  are a very cost-effective solution compared with other insulation methods.

Electrical pitting often occurs in the use of rolling bearings in high power electromotor, wind turbine generator and rail vehicles motor systems and cause sparks that damage the rolling contact surface, ultimately lead to bearing failure.

Electric insulated bearings therefore have been created and take the place of non-insulated bearings. we  applies advanced surface modification process overlay a ceramic coating on the bearing ring, to insulate the electrical current flow into bearing substrate, so the electrical pitting is prevented and bearing's service life is extended.

It is significantly more cost-effective to provide for the use of electrically insulated bearings at the planning stage. As a result, customer benefit is increased through reduced maintenance costs and higher machine availability.

SAT series are the electrically insolated bearing products developed and marketed by us The insulation has a guaranteed breakdown resistance of at least 1000V AC or DC. We can also develop tailored modes for customer on types and precision levels, as well as higher electrical insulation.

Bearing features

Protection against electrical erosion 

With insulating properties integrated into the bearing, INSOCOAT bearings can improve reliability and increase machine uptime by virtually eliminating the problem of electrical erosion.

High electrical resistance 

The aluminium oxide coating provides a minimum electrical resistance of 200 Ω and can withstand voltages up to 3 000 V DC.

Consistent electrical performance 

Plasma-spray coatings are normally hygroscopic and, therefore, vulnerable to penetration caused by condensation. To protect against this effect, INSOCOAT bearings are treated with a unique sealant.



Application of Insulated Bearings in Electric motors

1. Causes and harm of motor shaft voltage and bearing current formation

In the operation of the motor, any imbalance in the phase currents in or around the rotor's magnetic circuit can  produce a rotating system flux linkage.

When the shaft rotates, these flux chains can generate a potential difference across the shaft. This potential difference is called the shaft voltage. The shaft voltage can excite a circulating current through a loop formed by the two ends of the bearing in the shaft and the casing (closed circuit), which is called the shaft current.

In addition, the rotor core has more remanence, For a wound rotor motor, shaft voltage and shaft current are generated if two or more windings are short-circuited to the rotor core or the shaft. the bearing current is related to the structure of the motor, the power of the motor, the magnitude of the drive voltage, the rise time of the pulse, the length of the cable, etc. The larger the power of the motor, the higher the driving voltage, the steeper the rising edge of the driving voltage, and the shorter the cable, the larger the bearing current.


2. How to block shaft current - use electrically insulated bearings

In order to avoid damage to the bearing caused by the shaft current, effective measures should be taken to isolate the shaft current. For large motors with independent bearing housings at both ends, spacers made of insulating material can be placed between the bearing housing and the metal base. For a motor in which an ordinary bearing and a casing are integrated, an Electrically insulated bearing is generally used at one end thereof (often arranged at the non-spindle end).

For high requirements, insulated bearings are installed at both ends. The insulating bearing used is generally a method of attaching (generally coating) an insulating layer to the outer ring. In some cases, the inner and outer rings are also provided with an insulating layer.

Electrically insulated bearings avoid damage caused by electrical corrosion, so they are more reliable in operation than in conventional bearings. And compared to other insulation methods, such as shaft or housing insulation, etc. More cost effective and reliable. Insulated bearings have the same dimensions and basic technical features as non-insulated bearings Suitable for motors, generators, especially variable frequency motors.

CoatMaster (China Bearing manufacturer), As the exprienced Electrically Insulated Bearing manufacturer of China, Not only produce insulated deep groove ball bearing, insulated cylindrical roller bearing, insulated tapered roller bearing, insulated angular contact ball bearing and the other type of insulated bearing, but also supply complete and expert solution for electric motor and the other applications where need insulated bearing. if you have problem make you distracted about the insulated bearing, just contact with our bearing technical team.
6218/C3vl0241 Current Insulating Bearings
Bearing Dimension  Basic Dynamic Load Rating Fatigue Limit Load rated speed
dynamic static Reference speed Limiting speed
d[mm] D[mm] B[mm] C[kN] C 0[kN] P u[kN] [r/min] [r/min]
6314/C3VL0241 70 150 35 111 68 2.75 9500 6300
6314M/C3VL0241 70 150 35 111 68 2.75 9500 9000
6215/C3VL0241 75 130 25 68.9 49 2.04 10000 6700
6315/C3VL0241 75 160 37 119 76.5 3 9000 5600
6315M/C3VL0241 75 160 37 119 76.5 3 9000 8000
6216/C3VL0241 80 140 26 72.8 55 2.2 9500 6000
6316/C3VL0241 80 170 39 130 86.5 3.25 8500 5300
6316M/C3VL0241 80 170 39 130 86.5 3.25 8500 7500
6217/C3VL0241 85 150 28 87.1 64 2.5 9000 5600
6317/C3VL0241 85 180 41 140 96.5 3.55 8000 5000
6317M/C3VL0241 85 180 41 140 96.5 3.55 8000 7500
6218/C3VL0241 90 160 30 101 73.5 2.8 8500 5300
6318/C3VL0241 90 190 43 151 108 3.8 7500 4800
6318M/C3VL0241 90 190 43 151 108 3.8 7500 7000
6219/C3VL0241 95 170 32 114 81.5 3 8000 5000
6219M/C3VL0241 95 170 32 114 81.5 3 8000 7500
6319/C3VL0241 95 200 45 159 118 4.15 7000 4500
6319M/C3VL0241 95 200 45 159 118 4.15 7000 6300
6220/C3VL0241 100 180 34 127 93 3.35 7500 4800
6320/C3VL0241 100 215 47 182 140 4.75 6700 4300
6320M/C3VL0241 100 215 47 182 140 4.75 6700 6000
6222/C3VL0241 110 200 38 151 118 4 6700 4300
6222M/C3VL0241 110 200 38 151 118 4 6700 6300
6322/C3VL0241 110 240 50 216 180 5.7 6000 3800
6322M/C3VL0241 110 240 50 216 180 5.7 6000 5300
6224/C3VL0241 120 215 40 153 118 3.9 6300 4000
6324/C3VL2071 120 260 55 216 186 5.7 5600 3400
6324M/C3VL2071 120 260 55 216 186 5.7 5600 5000
6226/C3VL2071 130 230 40 163 132 4.15 5600 3600
6326/C3VL2071 130 280 58 242 216 6.3 5000 3200
6326M/C3VL2071 130 280 58 242 216 6.3 5000 4500
6228/C3VL2071 140 250 42 174 150 4.55 5300 3400
6328/C3VL2071 140 300 62 265 245 7.1 4800 3000
6328M/C3VL2071 140 300 62 265 245 7.1 4800 4300
6230/C3VL2071 150 270 45 186 166 4.9 5000 3200
6330/C3VL2071 150 320 65 286 285 7.8 4300 2800
6332M/C3VL2071 160 340 68 291 285 7.65 4000 3800
6334M/C3VL2071 170 360 72 332 340 8.8 3800 3400
6336M/C3VL2071 180 380 75 371 405 10.4 3600 3200
6218/C3vl0241 Current Insulating Bearings 6218/C3vl0241 Current Insulating Bearings 6218/C3vl0241 Current Insulating Bearings 6218/C3vl0241 Current Insulating Bearings 6218/C3vl0241 Current Insulating Bearings




 

 

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