The YLMD series sealed water-cooled dual speed three-phase asynchronous motor for bell type bright annealing furnace is suitable for the gloss annealing treatment equipment of copper and steel materials under inert gas protection. It is an improved version of the YLKN series, integrating water cooling and sealing. The external water tank of the bell type furnace can be removed, and the end cover and base of the motor are water-cooled. The electric structure is sealed and forms a sealed whole with the bright annealing furnace

This motor has the advantages of small size, light weight, reasonable performance, high reliability, and easy use and maintenance. The sealed water-cooled motor used in the YLMD series bell jar annealing furnace is a variable pole variable speed motor. The YLMD180-250-8/4 stage is a single winding dual speed motor, with the 4-pole connected to 2Y and the 8-pole connected to Y, while the YLMD250-8/6-pole is a dual winding dual speed motor with the 6-pole and 8-pole connected to Y respectively. The motor starts at low speed and runs at high speed with pole changing when the furnace temperature reaches 200 ℃ or above
The rated voltage of the electric motor is 380V and the rated frequency is 50Hz
The insulation level of electric motors is divided into FH level: the working system of electric motors is continuous working system S1; the protection level of electric motors is IP65; The installation type of the electric motor is V3

The YLMD series sealed water-cooled electric motor for the Chuan style annealing furnace is cooled by circulating water at the bearing chamber where the base shell and flange end cover are installed, adapting to the high temperature environment of the bell type annealing furnace. The water jacket of the base and end cover can withstand a pressure of 3Mpa, and the water pressure in the water jacket is 1-1.5Mpa. The upper and lower inlet pipes and junction box are on the same side, and the upper and lower outlet pipes are on the same side
The working environment of the electric motor is filled with inert gas. The electric structure is sealed and can withstand pressures ranging from -0.1 to 0.13 Pa, ensuring that the gas inside the motor cannot leak out
The bearing structure of the electric motor has an oil injection device, which should be refilled once every six months. The electric motor uses imported bearings and high-temperature resistant lubricating grease
The electric motor is equipped with a thermal protection device. A PTC thermistor is placed at the end of the winding and connected to a temperature controller (supplied to the user simultaneously with the motor) to monitor the temperature and provide thermal protection for the running motor

YLMD series sealed water-cooled dual speed three-phase asynchronous motor for bell type bright annealing furnace

Main technical data of YLMD series electric motors

Installation and external dimensions of YLMD series motors