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Euro Diameter 4.2m
Totem
8474900000
Production Discription
The Coal Mine Rotary Drum Screen Cylinder is the core load-bearing and screening component of the entire machine, directly impacting the equipment's structural strength, operational stability, and screening efficiency. The cylinder is typically fabricated by rolling and welding thick-walled steel plates, offering excellent rigidity and impact resistance. This enables it to withstand long-term continuous operation, high loads, and dusty environments under coal mine working conditions.
Machinery Processing
(1)Cylinder Welding
The rotary separator shell is formed by rolling high-quality steel plates and then undergoes integral welding. By applying appropriate welding sequences and process controls, welding deformation is effectively minimized. This ensures the structural strength and roundness of the cylinder, providing a stable foundation for subsequent precision machining.
(2)Cylinder Turning
After welding is completed, the entire rotary drum is mounted on a lathe for precision turning. Machining operations are performed on the end faces, outer diameter, and key mating surfaces to ensure dimensional accuracy, roundness, and coaxiality of the cylinder, meeting both assembly and operational requirements.
(3)Cylinder Sandblasting
The drum shell surface undergoes sandblasting treatment to thoroughly remove welding slag, oxide scale, and surface contaminants. This process enhances surface cleanliness and roughness, creating optimal conditions for subsequent anti-corrosion coating.
(4)Internal Support Beam Welding of the Cylinder
Reinforcing support beams are welded inside the cylinder to enhance its overall rigidity and deformation resistance, ensuring structural stability and reliability under prolonged operation and material impact conditions.
(5)Two-Section Cylinder Assembly and Alignment
The cylinder adopts a segmented design, requiring the assembly of two sections. This process focuses on controlling the axial alignment of both sections. Through specialized tooling and measurement methods, overall coaxiality and straightness are ensured, preventing vibration and abnormal wear during operation.
Quality Inspection
1,Infrared Inspection of Internal Embedded Structure Straightness in the Cylinder
Infrared inspection equipment is employed to measure the straightness of the internal embedded structure and the overall axis of the cylinder, ensuring that its geometric accuracy along the longitudinal direction meets design specifications.
2,Ultrasonic Testing (UT)
Ultrasonic non-destructive testing is conducted on cylinder welds and key load-bearing areas to promptly identify internal defects, ensuring welding quality and structural safety.
3,Runout Tolerance Inspection
Runout testing is performed on the rotating sections of the cylinder, with strict control over radial and axial runout to ensure smooth and low-vibration operation of the Rotary Drum Screen.
4,Coaxiality Inspection
Coaxiality testing is conducted on both the overall cylinder and its assembled components to ensure stable power transmission, thereby extending the service life of bearings and drive parts.
Packaging & Shipping
Upon completion of all machining and inspection processes, the rotary drum proceeds to the packing and shipping phase. Based on its dimensions, weight, and transportation distance, a tailored packing plan is developed to ensure the product remains secure during transport, handling, and on-site storage.
Anti-rust treatment is applied to the cylinder surface and key machined areas. Critical mating surfaces receive enhanced protection, including rust-preventive oil, protective film, and specialized wrapping materials. For extra-long or large-diameter cylinders, a segmented packing method may be employed, supplemented by dedicated supports and reinforcement structures to effectively prevent deformation and impact damage during transit.
Throughout the packing process, both sea and land transport conditions are carefully considered. Lifting points and load-bearing supports are strategically arranged to ensure safe and efficient loading and unloading. All packing solutions adhere to the principles of "preserving machining accuracy, minimizing transportation risks, and facilitating on-site installation," thereby delivering reliable and secure protection to our customers.
Packaging
Shipping
