The abnormal screening surface of the stone removal machine may be caused by five major factors: material characteristics, equipment parameters, mechanical structure, airflow distribution, and operation and maintenance. The specific reasons and analysis are as follows:1、 Material characteristic issues1. Excessive humidityExcessive moisture content in materials can cause stones to adhere to grains, increase screen resistance, and prevent effective separation of stones. For example, when the moisture content of rice exceeds 15%, the sieve surface is prone to clumping and needs to be dried to reduce moisture.2. Uneven granularityExcessive differences in material particle size can disrupt the uniformity of the sieve surface. Particles that are too large may clog the sieve holes, while those that are too small are easily blown through by airflow, leading to ineffective grading. The sieve size needs to be adjusted according to the material characteristics (such as 2-5mm).2、 Improper ...

The surface friction force of the screening material of the stone removal machine has a significant impact on the stone removal effect, as follows:1、 The situation with high friction forcePromote material stratification: The greater frictional force enhances the interaction between material particles and between the material and the sieve surface. Under the vibration of the stone removal machine, this strong frictional force helps the material to be layered according to density and particle size. Stones with higher density are more likely to move towards the lower layer of the screen surface, while lighter materials are distributed in the upper layer, creating favorable conditions for the subsequent separation of stones and materials.Increasing the residence time of stones: The increased friction slows down the movement speed of stones on the screen surface, prolonging their residence time on the screen surface. In this way, the stones have more time to gradually move towards the low...

The reduction of material loss by non crushing elevators can be achieved through equipment selection, installation and commissioning, operation and maintenance. The specific methods are as follows:1、 Reasonably choose equipmentSuitable lifting machine type: Select the appropriate type of non crushing lifting machine based on the characteristics of the material, such as particle size, humidity, viscosity, etc. For example, for block materials, a chain bucket elevator can be used, which has a large hopper capacity and can effectively carry block materials, reducing collisions and breakage during the lifting process, thereby reducing losses.Appropriate lifting speed: If the lifting speed is too fast, it may cause the material to collide with equipment components due to inertia during the lifting process, resulting in material loss. The appropriate lifting speed should be selected based on the characteristics of the material and the specifications of the hoist. Generally speaking, for m...

The uneven vibration of the stone removal machine is mainly caused by three major factors: improper equipment parameter settings, mechanical structural failures, and loose or worn components. The specific reasons and analysis are as follows:1、 Improper device parameter settings1. Amplitude and frequency imbalanceExcessive amplitude (over 5.5mm): causes the material to jump violently, disrupts the automatic grading, and mixes stones with grains.High frequency: The material moves too fast, the material layer thickens, and it affects the separation efficiency.Too small amplitude (less than 3.5mm): The material moves slowly and the material layer is too thick, which also reduces the separation efficiency.Solution: Adjust the weight block of the vibration motor to maintain the amplitude within the range of 3.5-5mm; The frequency generally does not need to be adjusted, but it is necessary to ensure that the speed of the eccentric transmission stone removal machine meets the requireme...

To prevent hopper detachment and deformation faults in non crushing elevators (taking bucket elevators as an example), the following measures can be taken:1、 Prevent hopper detachment failure1. Tighten bolts in stagesWhen installing for the first time, tighten the connecting bolts between the hopper and the chain, run it without load for 2-4 hours, and immediately tighten it again after stopping.After one week of formal feeding operation, tighten the bolts again.After running continuously for one month, check the bolts for the third time and tighten them.By tightening in stages, initial looseness caused by vibration can be eliminated.2. Adopting anti loosening measuresFor high load conditions, welding can be used to spot weld the nut and screw interface after tightening the bolt to prevent thread retraction. This method has low cost and significant effect, but attention should be paid to welding strength to avoid affecting bolt disassembly.Replace ordinary bolts with anti loosening a...

The methods for adjusting the chain tension of different types of unbreakable hoists may vary slightly, but they can generally be adjusted through the following common methods:1、 Adjust the tensioning deviceMany unbreakable elevators are equipped with tensioning devices at the tail or bottom, commonly including screw type tensioning devices. This device changes the tension of the chain by rotating the screw and pushing the tensioning frame with sprocket or drum to move. When performing the specific operation, first loosen the fixing bolts on the tensioning frame, then use a wrench to rotate the screw to move the tensioning frame along the guide rail, observe the tension of the chain until it reaches the appropriate tension, and finally tighten the fixing bolts.Some elevators also use spring type tensioning devices, which use the elastic force of the spring to automatically adjust the tension of the chain. If the chain is found to be loose, the tension can be increased by adjusting t...