With the acceleration of China's mechanization process, large-scale mechanized operations have become the standard equipment for the entire heavy industry. Loaders are widely used in various fields, such as roads, buildings, mines, etc., mainly responsible for the excavation and transportation of powder materials such as sand, lime, and ore powder. With different auxiliary work equipment, they can even be used for soil pushing, lifting, and other work, which can be described as a multi-purpose machine.
But in fact, such a good equipment may also have some problems. It produces a certain amount of noise during operation. With the continuous progress of technology, the noise can be controlled within a reasonable range. However, some customers have consulted us and said that the loader has become larger recently, and we cannot find the reason. Below, the editor of Jinan Loader Rental Factory will solve this problem for everyone:
It should be noted that the main source of noise is mechanical noise:
1. Due to the many motion pairs on the diesel engine of the loader, there are also many mechanical excitation forces caused, including the noise generated by piston and cylinder knocking, timing gear noise, fuel injection system noise, and valve train noise.
2. In an engine, any rotating component such as the crankshaft, flywheel, pulley, etc. forms a vibration force. As this vibration force is proportional to the imbalance of the component and the square of its speed per minute, as the speed increases, the vibration is also sharply amplified, resulting in a smaller balance between rotating components.
Other mechanical noise comes from the engine pistons, valve mechanisms, etc., which form a part of the engine noise, such as piston knocking, tappet noise, noise generated by valve opening and closing, noise generated by valve and valve spring vibration, and noise generated when the timing chain engages with the sprocket.
3. Piston knocking is the noise generated by the side of the piston striking the cylinder wall. When the compression pressure acting on the piston changes into combustion pressure, knocking occurs. The piston knocking on the cylinder varies depending on the piston clearance, and when the piston clearance is large, there may be a knocking sound. The characteristic of piston knocking on the cylinder is that the engine makes a loud noise when it is cold, because the piston clearance is large at this time, and as the engine temperature rises, the sound also decreases.
To reduce piston knocking, it is necessary to reduce the main side pressure. Therefore, some engines can reduce the knocking sound by deviating the center of the piston pin from the centerline of the piston by a certain distance. Another method to reduce piston knocking on the cylinder is to install a steel frame on the piston skirt to reduce thermal deformation of the piston skirt. This allows for the use of slightly larger pistons to reduce piston clearance and reduce the sound of piston knocking on the cylinder.
The above analysis of loader noise is believed to be helpful to you. If any abnormal machine noise is found, it should be dealt with in a timely manner. Starting from the above three points, the investigation should be carried out first. If it is still not resolved, you can call us for consultation http://www.ycgjglcl.com We will provide you with technical support in all aspects!