LS type screw conveyor (hereinafter referred to as screw machine) has novel structure and advanced technical indexes. The head and tail bearings are moved to the outside of the shell. The middle suspension bearing adopts two structures of rolling and sliding interchangeability, and all have dustproof sealing devices. The discharge end is provided with a cleaning device, which has low noise, strong adaptability, convenient operation and maintenance, and flexible arrangement of inlet and outlet. Screw machines are widely used in various industrial sectors, such as building materials, electric power, chemical, metallurgy, aluminum-magnesium, coal, machinery, light industry, food and food industries; used at horizontal or less than 20 ° inclination, conveying powder, granular and Small fast materials, such as cement, coal powder, grain, fertilizer, ash, sand, etc., the material temperature is below 200 °C.

　　It is not advisable for the screw machine to transport materials that are prone to deterioration, viscous and easy to agglomerate, because these materials will adhere to the spiral during transport and will rotate without moving forward or forming a build-up of material at the sling bearing. And the screw machine does not work properly.