Siemens Washing Machine, Large Vibration Noise During Operation
Experience summary from Beijing Siemens Washing Machine After-sales Service Center.
Fault Inspection: Upon checking the suspension rod components, it was found that the spherical contact points of the suspension rod and the mating areas between the spring sleeve and its connecting parts were not smooth, hence producing noise. The movement of the spring sleeve along the axis of the suspension rod was obstructed. When the spin basket vibrates, it causes the suspension rod to move up and down, resulting in collisions between the water container and the spring sleeve, thus causing abnormal vibration and noise. The mating areas between the spring sleeve and its connections were smoothed out by grinding and lubricant was added to reduce the noise. After the aforementioned treatment, the machine was tested and the washing machine operated normally with the fault resolved.
Fault Analysis: Upon inspection after turning on the machine, it was discovered that the vibration noise originated from the suspension spring rod component. The suspension spring rod component is the hanging and shock-absorbing part of the washing machine's water container section. The outer convex spherical surfaces on the suspension rod base and the spring sleeve are respectively mated with the corresponding concave spherical surfaces on the box corner and the water container on the body of the machine, allowing for smooth sliding. The spring seat, supported by a small spring, has a tight fit with the spring sleeve. Its surface is coated with a layer of polytetrafluoroethylene (PTFE), which serves as a seal and reduces friction through self-lubrication. When the water container vibrates, the spring sleeve swings along the spherical surface and slides along the axis of the suspension rod, absorbing the vibration energy and reducing the vibrations caused by the spinning basket that would otherwise lead to vibrations in the main body of the machine.