What is the difference between explosion-proof motor and ordinary motor
Explosion-proof electric motor is a kind of electric motor which 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 motors as the main power equipment are commonly used to drive pumps, fans, compressors and other driving machines.
Both sides (1) the motor end cover bolts grooves dark and slot 5 times deeper than the ordinary motor (still need to add asbestos washer as required), mainly for internal winding burned one thousand, gap with the spark will not up to the outside. (2) of the motor terminal box added gasket sealing with excellent structure, internal pinout of windings is sealed lead to the terminal, and in order to reduce the generated sparks link only commonly lead to three points (normal is six, connection piece). (3) terminal block access of the external power source, is to extend the ten centimetres, movable connection, both ends with airtight fire tube thread interface, can join explosion-proof motor reliably threading pipe, so that the motor and the input power cord meet all closed fire prevention requirements
The cooling fan at the tail end of the motor is used to keep the blades of the wind from the wind shield, and the outside of the wind blade is larger than the guide, and the blades are made of plastic. Why the appearance of explosion proof machine is so unflattering: because the front and rear cover is fixed by the hollow bolt and the socket is deep, it makes the ends appear not round and round. The junction box with a tube is a weird and complex structure, unlike a normal motor connection box. See the roundness and concise appearance that is used to general electric motor, look again the explosion-proof electric machine that has the Angle of a kind of strange Angle also can feel not good-looking! Hahaha, deep-sea diving cap, space cap, gas mask, dust respirator... People put it on his head and mouth, isn't it also worse than pig's mouth, is the functional structure, they have decided they ugly external shape, is helpless!
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.
Compared with the general motors explosion-proof electric motor is characterized by: (1) meet the requirements of type increased safety explosion-proof motor, a series of reliable measures to prevent spark, arc and danger of high temperature, can be safe operation in explosive dangerous location 2 zone. (2) 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.
