What is the difference between explosion-proof motors and ordinary motors?
Its structural features are: (1) there is a complete ventilation system which does not exist within the motor. (2) the shell and pipe are made of non-combustible materials and have sufficient mechanical strength. (3) the casing and the main pipe are sufficiently large to maintain the positive pressure relative to the outside atmosphere. (4) the motor must have a safety device (e.g., time relay and flow monitor), to ensure adequate ventilation, also must have the shell pressure under voltage automatic protection and alarm device. (5) the door or cover of the enclosure shall be equipped with the power interlock. There is no single series of positive voltage motor series in our country.
the excitation control system is reliable by using the brushless excitation, setting the rotary rectifier disc and the static excitation cabinet. It is accurate to be accurate, without impact. The excitation system loses step protection and is reliable, and the whole step is strong. The circuit design is reasonable, the discharge resistance is not hot in the work. Excitation current adjusts the scope width. (3) synchronous machine, ac exciter and rotating rectifier disk coaxial. The rectifying disk is located between the main motor and the exciter, or outside the bearing seat. (4) the hull protection level is IP54. Adopt F class insulation, temperature rise press B. (6) change the traditional water cooling to the upper water cooling, the water cooler on the upper part of the motor. (7) set up an antitide heaters, fixed in the hood of the motor, to be used for heating and moisture-proof during downtime. (8) select the high quality raw materials, electrical and mechanical calculation with a large margin, which can meet the temperature requirements of the running reliability and the increase of an ampere motor. (9) to set up comprehensive monitoring measures; The main junction box is set up for the differential protection of the self-balancing current transformer. The stator winding is buried in the work and the spare platinum-thermal resistance, which is Pt100. A leak monitor to monitor the leak of a water cooler; The two sides of sliding bearings have the on-site temperature display and remote signal terminals. Positive pressure type motor is a type of positive voltage electrical equipment.
The explosion-proof motors are fully sealed and allow no gas to enter the inside of the motor, including the inability to enter the junction box to prevent the electrical spark from causing the gas explosion. Ordinary motors do not have this seal requirement.
The difference between explosion-proof motor and ordinary motor: Explosion-proof motors are commonly used in inflammable and explosive situations. 2, the seal of explosion proof electrical connection box is better than ordinary motor. The protection level of explosion proof motor is IP55, and the ordinary motor has IPIP23, IP44, IP54, IP55 and IP56, so it can be distinguished from the shape. Explosion-proof electric motor is a kind of motor that can be used in inflammable and explosive factory. Explosion-proof motors are mainly used in coal mines, oil and gas, petrochemical and chemical industries. In addition, in textile, metallurgy, city gas, transportation, grain oil processing, paper, medicine and other departments are also widely used. Explosion-proof motor is the main power equipment, which is used to drive pumps, fans, compressors and other driving machines.
