Well furnace is a periodic working furnace, which is suitable for the heat treatment of rod and long shaft parts. The structure of well type furnace is: the furnace body is a cylindrical deep well, and the workpiece is vertically loaded into the furnace by a special crane for heating. The fuels used are usually gas and oil. When electricity is used as heat source, it is called well resistance furnace. Well type carburizing furnaces are generally installed below the workshop floor, or above the floor, or half above and half below the floor. Well type furnaces are named as forced convection well type furnace, natural convection well type furnace, well type gas carburizing furnace, etc.

1. Convection tube

The function of the convection tube is to ensure that the materials to be treated are separated from the inner tube and provide a convection channel with controllable atmosphere. The hot air first rises along the annular gap between the convection cylinder and the inner cylinder, then turns down and enters the material stack. The gas flow rate in the annulus is high and remains unchanged, which is conducive to the heat transfer between the gas flow and the inner cylinder.

2. Furnace bottom mixing fan

A stirring fan is installed in the center of the furnace bottom. During heating, the circulating and controllable atmosphere passes through the annular space between the convection cylinder and the inner cylinder, and the heat is obtained from the inner cylinder and transferred to the workpiece. The fan operates throughout the cooling phase, producing strong convection in the loading space. The controlled atmosphere takes heat away from the workpiece and transfers it to the inner cover. The mixing fan adopts a variable-frequency speed regulating motor. The motor speed can be adjusted according to the temperature in the furnace. It has the characteristics of accurate speed, easy use and maintenance.

3. Combustion engine

The burner system consists of burner, fan, pipe system and smoke exhaust pipe. Two rows of eight burners are distributed along the tangential direction of the outer cover of the furnace body, which is conducive to uniform furnace temperature and reduce local overheating of the inner cover. It directly heats the inner cylinder and is the heating source of the well type furnace.

The above is the relevant content introduced to you by the small editor of the well type nitriding furnace. I hope it will be helpful to you.