What are the types of explosion-proof motors? How should we distinguish? Dalan hydraulic motor tells you that the protection level of explosion-proof motor is IP55. However, the protection level of ordinary motor is IP23, IP44, IP54, IP55, IP56, so it can be distinguished from the shape. Specific reference to the following classification: 1, according to the principle can be divided into explosion-proof asynchronous motor, explosion-proof synchronous motor and explosion-proof DC motor. 2, according to the use of occasions can be divided into coal mine underground explosion-proof motor and factory explosion-proof motor. 3, according to the characteristics can be divided into explosion-proof motor, increased safety motor, positive pressure motor, non-sparking motor and dust explosion-proof motor. 4. According to the supporting main machine, it can be divided into explosion-proof motor for coal mine transport machine, explosion-proof motor for coal mine winch, explosion-proof motor for rock loader, explosion-proof motor for local fan of coal mine, explosion-proof motor for valve, explosion-proof motor for fan, marine explosion-proof motor, Increased safety type brushless excitation synchronous motor for blasting metallurgical explosion-proof motor and hydrogenation unit. 5, can also be divided according to the rated voltage, efficiency and other technical indicators, such as high-voltage explosion-proof motor, high-efficiency explosion-proof motor, high slip rate explosion-proof motor and high starting torque explosion-proof motor. The following focuses on the characteristics of the flameproof motor, the increased safety motor and the positive pressure motor. Flameproof motors use a flameproof enclosure to separate electrical parts that may generate sparks, arcs, and hazardous temperatures from the surrounding gas mixture. However, the outer casing is not sealed, and the surrounding gas mixture can enter the interior of the motor through the joint gap of the various parts of the outer casing. It may occur when it comes into contact with the ignition source such as sparks, arcs, or dangerous high temperatures in the casing. At this time, the flameproof casing of the motor will not be damaged or deformed, and when the flame or hot gas passes through the joint gap, it cannot Ignite the surrounding gas mixture. The main features are as follows: 1. The corresponding relationship between power level, installation size and speed is consistent with DIN42673. At the same time, considering the inheritance of YB series and the interchangeability of Y2 series, the necessary adjustments are made, which is more effective and applicable. 2. The noise limit is lower than that of the YB series, which is close to the Y-class noise of the YB series, and the vibration limit is equivalent to the YB series. 3. The whole series adopts Class F insulation, and the temperature rise is assessed according to Class B. 4. The motor heat sink has two parallel horizontal distributions and radiation distribution, which are mainly distributed in parallel horizontal. 5. The whole series uses low-noise deep groove ball bearings, and the center of the machine base is above 180mm. 6. The enclosure protection level is increased to IP55. 7. The main performance indicators reached the international advanced level in the early 1990s. Increased safety motors are motor structures that do not generate arcs, sparks or dangerous high temperatures under normal operating conditions, and some mechanical, electrical and thermal protection measures are taken to further avoid arcing under normal or approved overload conditions. , sparks or high temperature hazards to ensure their explosion-proof safety. The main features are as follows: 1. To meet the requirements of increased safety explosion-proof motors, a series of reliable measures to prevent sparks, arcs and dangerous high temperatures can be safely operated in hazardous areas in Zone 2. 2. Adopting brushless excitation, setting rotary rectification disc and static excitation cabinet, the excitation control system is reliable; the ac-polarity is poorly excited and has no impact; the excitation system is out of step protection and reliable, and the whole step ability is strong; the circuit design is reasonable. The discharge resistor does not generate heat during operation; the excitation current adjustment range is wide. 3. Synchronous machine, AC exciter and rotating rectification coil are coaxial. The rectifier disk is located between the main motor and the exciter or outside the housing. 4. The enclosure protection grade is IP54. 5, using Class F insulation, temperature rise according to B-level assessment. 6. Change the traditional water cooling to the upper water cooling, that is, the water cooler is placed on the upper part of the motor. 7. Set the increased safety type moisture-proof heater, which is fixed in the cover at the bottom of the motor and used for heating and moisture-proof when the machine is stopped. 8. Select high-quality raw materials, and leave a large margin for electrical and mechanical calculations to meet the operational reliability and temperature requirements of increased safety motors. 9. Set up complete monitoring measures; set up the self-balancing current transformer for differential protection in the main junction box; the stator winding buried working and standby platinum thermal resistance, the graduation number is Pt100; set the water leakage monitor Monitor the leakage of the water cooler; the sliding bearing at both ends is provided with an on-site temperature display instrument and a remote signal terminal. A positive pressure type motor is a type of positive pressure type electrical equipment. The main features are as follows: 1. There is a complete ventilation system, and there is no dead corner in the motor that may affect the ventilation. 2. The outer casing and piping are made of non-combustible material and have sufficient mechanical strength. 3. The casing and the main pipe maintain a sufficiently large positive pressure relative to the outside atmosphere. 4. The motor must have safety protection devices (such as time relay and flow monitor) to ensure sufficient air exchange capacity. It must also have automatic protection or alarm device for air pressure undervoltage in the casing. 5. The quick opening door or cover on the outer casing must have a device that is interlocked with the power supply. ----- Responsible Editor: Dalan Oil Pump Motor 02- Purchasing Consultant Copyright http:/(Dalan Motor) Reprint, please indicate the source http://news.chinawj.com.cn
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