Differences and advantages of YBK3 explosion-proof motor and YB2, YB3 and YBK2 series

When using mine explosion-proof motors, users generally know that YB series are explosion-proof motors, mine explosion-proof motors and YB2, YB3, YBK2, YBK3 and other series, the customer for the difference between these motors and contact is not a lot of understanding, today to take you to understand the difference between them in detail.

If the difference and connection between them should be first from the respective use and characteristics:

YB2 explosion-proof motor products

YB2 series flameproof three-phase asynchronous motor is the replacement of YB series and the basic series of explosion-proof motor.This series of motors are characterized by small size, light weight, beautiful appearance, safe operation, long service life, excellent performance, easy installation, use and maintenance.

YB2 explosion-proof motor features: the housing is made of cast iron, which is used in non-mining surface places on mining Wells. The explosion-proof grade is: EXDI, old three-level energy efficiency.

Advantages: mature products, sufficient stock, low price.

Disadvantages: because of high energy consumption, has been required to stop production.

YB3 explosion-proof motor products

YB3 series is a new product developed on the basis of YB and YB2 series motors and combined with the new technology of electromagnetic structure, technology and material at home and abroad.

YB3 explosion-proof motor features: the housing is made of cast iron, which is used in places with non-mining surface on mining Wells. The explosion-proof grade is: EXDI, new three-level energy efficiency.

Advantages: mature products, sufficient stock, low price, is YB2 explosion-proof motor upgrade products.

Disadvantages are: can not be applied to the underground mining surface, the impact resistance is not enough.

YBK2 explosion-proof motor

YBK2 series flameproof three asynchronous motors used in underground coal mine are mainly used below the mining face, which are regarded as special motors for mechanical design of mining working face in underground coal mine. The chassis is formed by steel plate welding, wind cover, junction box and insulation structure are reinforced.YBK2 series three flameproof asynchronous motors for underground use in coal mines are made into flameproof motors with the flameproof mark "Exdl" according to the provisions of GB3836.2 "flameproof type" d "for electrical equipment used in explosive gas environment.Mainly used in coal mine underground harsh working environment.YBK2 series three flameproof asynchronous motors for underground coal mine are the same as YB2 series motors in gas performance, installation size and rated power, except for the special requirements of the frame, wind hood and junction box.YBK2 series coal mine flameproof three-phase asynchronous motor is our country to replace YBK series and upgrading of the new design of the coal mine with basic series flameproof motor, it has high efficiency, large torque, strong overload capacity, low noise, small vibration, temperature tolerance, good performance, easy installation and maintenance, long service life and other advantages, flame-proof structure is reasonable, safe and reliable use, beautiful appearance, etc.

YBK2 explosion-proof motor features: the casing is made of steel, used for mining underground mining surface, explosion-proof grade: EXDI, old three-level energy efficiency.

Advantages: mature products, sufficient stock, low price, used for underground mining surface, steel shell material has high anti-impact performance.

Disadvantages: because of high energy consumption, has been required to stop production.

YBK3 explosion-proof motor products

YBK3 explosion-proof motor is used for coal mine well (below the mining face), the explosion-proof structure of the motor is ExdI Mb.The explosion-proof mark for ExdI Mb is suitable for underground mining face containing gas or coal dust.This series of motors are squirrel-cage flameproof three-phase asynchronous motors, the enclosure protection class is IP55, the cooling mode is IC411 fully enclosed self-fan cooled.The structure and installation type of the motor are IMB3, IMB5 and IMB35.YBK3 explosion-proof motor is a special motor designed for the mechanical design of mining surface in underground coal mine. The base is formed by welding steel plate, and the wind cover, junction box and insulation structure are strengthened. It is mainly used in the harsh working environment in underground coal mine.

YBK3 flameproof motor requires that when the explosive mixture inside the motor explodes, the flameproof housing shall not be damaged or deform to affect the flameproof performance.The internal explosive flame is not allowed to cause the explosion of the external explosive mixture through the flameproof joint of the shell, for this reason:

1. The components that make up the flameproof shell, such as the chassis, end cover, bearing inner cover, junction box cover and junction box seat, shall undergo 1.5mpa after finishing, and the duration shall be at least 10S. The test results shall be deemed as qualified in static pressure test if there is no water drop and the shell does not produce permanent deformation or damage that affects the flameproof type;

2. See the length gap, surface roughness, electrical gap and creepage distance between exposed conductors inside the junction box and between exposed conductors and the metal shell.

3. The bolts connected to the flameproof housing are equipped with spring washers to prevent self-loosening, and the adaptability of the fasteners is greater than or equal to 640Mpa, that is, the mechanical performance class of the fastening bolts is 8.8.For mining products, fasteners that are vulnerable to external impact should also be provided with retainers.

4. Base, end cover, bearing inner cover, junction box seat, junction box cover, wiring bolts, terminal sleeve (or terminal plate), shaft and sealing ring are flameproof parts.

5. The highest surface temperature of the motor housing shall not exceed +150℃ in the rated working state.The temperature outside the inlet shall not be higher than the allowable temperature of the cable used to ensure reliable operation of the cable.

YBK3 explosion-proof motor features: the housing is made of steel, used for mining underground mining surface, explosion-proof grade: EXDI Mb, secondary energy efficiency.

Advantages: high efficiency energy-saving explosion-proof motor, secondary energy efficiency, enjoy the national energy conservation subsidy policy, low use cost.

Disadvantages: new products, market demand needs to be preheated, the price is higher than YBK2 series.

From the above motor knowledge, we can know that YBK3 is the latest energy-saving explosion-proof mine motor, which is used in the mining face under the mine, can enjoy the national energy saving subsidy, and can completely replace the use of YB2, YB3, YBK2 series explosion-proof motor.

YBK3 explosion-proof motor FAQ

Q: is YBK3 explosion-proof motor a new type of mine explosion-proof motor?

Answer: yes, YBK3 explosion-proof motor belongs to the new type of explosion-proof motor used in mines. It is the upgrade product of YBK2 explosion-proof motor.

Q: is YBK3 series flameproof three-phase asynchronous motor installed in underground coal mine the same as YBK2 flameproof motor?

A: yes, YBK3 and YBK2 are installed in exactly the same way.

Q: is YBK3 more energy efficient than YBK2?

A: better performance and stability than YBK2 and more energy efficient.

Q: is YBK3 explosion-proof motor expensive?

A: the price of the explosion-proof YBK2 motor is the same.

Q: are there any new changes in the model of YBK3 explosion-proof motor?

Answer: it is corresponding to YBK2 explosion-proof motor. Please download the following documents for details.

Preparation before installation of YBK3 explosion-proof motor

Before opening the YBK3 explosion-proof motor, check whether the packing case is intact.

After opening the case of YBK3 explosion-proof motor, please carefully remove the dust and anti-rust coating of YBK3 explosion-proof motor, and read the operation instructions carefully.

YBK3 explosion-proof motor shall be inspected as follows before installation. If it does not meet the requirements, it shall not be put into use.

A. It has the explosion-proof mark and the explosion-proof certificate number, and is consistent with the requirements of the use place of YBK3 explosion-proof motor;

B. The parts of the flameproof shell are connected correctly and the fastening is reliable;

C. All flameproof parts shall be free of cracks and defects affecting flameproof performance (new motors that have not been dismantled may not be inspected);

D. The grease injection and drainage device for bearing is smooth.

E. between the casing and the stator winding insulation resistance: not less than 0.38 M Ω when rated voltage 380 v;Rating voltage 660 v, not less than 0.66 M Ω, fixed voltage 1140 v, not less than 1.14 M Ω.

YBK3 explosion-proof motor is driven by elastic coupling. The center of the main shaft driven by YBK3 explosion-proof motor should be consistent with that of the main shaft driven, otherwise bearing damage and shaft fracture will be caused.

I have known whether you have a further understanding of explosion-proof motors YB2, YB3, YBK2 and YBK3. I hope these can help you determine the machine you need more quickly and accurately.