2026/04/29
Loosening and deformation of the blades in double screws compost turning machines are frequent equipment malfunctions. This not only reduces the turning and fermentation effect but also easily leads to problems such as machine stalling, abnormal noise, and main shaft damage. The causes can be mainly divided into several aspects.
Firstly, there is the issue of blade loosening. During long-term continuous operation, the fertilizer production machine experiences severe overall vibration, causing the blade fixing bolts and nuts to gradually loosen. Combined with aging gaskets and stripped bolt threads, the locking capacity is significantly reduced. Secondly, improper assembly and installation, such as uneven tightening force or insufficient torque during blade replacement, and misaligned blade installation positions, result in eccentric force during operation, eventually leading to loosening and detachment.
The most significant cause of blade deformation is the presence of impurities in the material. The presence of hard objects such as stones, iron blocks, and bricks in the raw materials causes direct, hard impacts on the helical blades during operation, resulting in excessive instantaneous force and bending or twisting. Simultaneously, excessively moist or viscous materials greatly increase turning resistance, causing the blades to be under overload and torsional stress for extended periods, gradually leading to plastic deformation.
Furthermore, the blades themselves are made of inferior materials, the plates are too thin, and they have not undergone wear-resistant reinforcement treatment, resulting in insufficient structural strength and making them prone to deformation under normal operating conditions. Improper daily operation can also accelerate damage; for example, excessive travel speed, frequent starts and stops in place, and excessively thick material piles will all increase the load on the blades. In addition, asynchronous rotation speeds of the two shafts and wear and vibration of the main shaft bearings will cause unbalanced stress on the blades, further aggravating blade loosening and deformation.
