Principles of Siemens Washing Machine Repair; The Dehydration Drum Does Not Rotate
Analysis and Maintenance: For a fully automatic double-drum washing machine during dehydration, the dehydration shaft must be connected as one unit with the washing shaft, and it should be in a non-braking state so that the washing shaft can drive the dehydration shaft to rotate synchronously. From the structure analysis of the reducer-clutch of this model, the clutch's reduction mechanism is encased by the dehydration shaft. The dehydration shaft consists of three hollow shafts: the lower half-shaft, the middle half-shaft, and the upper half-shaft, which are fixedly connected together. The lower half-shaft and the square hole clutch sleeve have a square wire clutch spring on their outer circles. The upper end of the square wire clutch spring is in a free state, while its lower part is inserted into the inner wall hole of the ratchet wheel. The square wire clutch spring makes flexible contact with the square hole clutch sleeve and the surface of the dehydration shaft. During dehydration, it tightly clutches the square hole clutch sleeve and the dehydration shaft, connecting the washing input shaft and the dehydration shaft as one unit for synchronous high-speed rotation in the clockwise direction. On the upper segment of the middle half-shaft, there is a torsion spring; on its lower segment inside, there is a gear, and the outer circle serves as the brake wheel of the dehydration shaft. The torsion spring makes flexible contact with the middle half-shaft, with one end in a free state and the other end fixed on the brake shaft. When the paddle wheel rotates in reverse, the torsion spring tightly clutches the dehydration shaft to prevent the dehydration drum from rotating. On the upper segment of the upper half-shaft, there is a square shaft, which fixes the dehydration drum component with a nut. When the pulley rotates, the washing input shaft directly drives the dehydration shaft to make the dehydration drum rotate at high speed. After inspection, it was found that the gap between the brake rod and the positioning sleeve was too large. When the electromagnetic iron core is attracted, the swing angle of the brake rod is insufficient, failing to release the brake band, causing the brake band not to separate from the brake wheel. Therefore, Beijing Siemens Washing Machine Repair determined that this caused the fault where the dehydration shaft does not rotate.
Handling Measures: Appropriately adjust the position of the positioning sleeve to make the gap between the brake rod and the positioning sleeve suitable, thereby eliminating the fault.
Beijing Siemens Washing Machine Repair Center - Edited Materials.
Fault Phenomenon: During dehydration, the washing input shaft rotates, but the dehydration drum does not rotate.