Compressor Impeller Locking Structure for Easier Shaft Assembly

The lock nut serves as an intermediary component between the rotary shaft and the nose piece. Instead of directly threading the nose piece into the rotary shaft, the lock nut mediates the connection by threading into the rotary shaft and providing a platform for bolt fixation of the nose piece, thereby reducing the nose piece thickness and weight while maintaining fixation reliability

The connection structure is segmented into distinct functional components: the lock nut for threaded engagement with the rotary shaft, and separate bolt holes in the lock nut and nose piece for additional mechanical fastening. This segmentation allows each component to be optimized independently, enabling the nose piece to be thinner and lighter while the lock nut handles the primary fixation function

The left-hand thread feature is extracted from the rotary shaft and transferred to the lock nut. The rotary shaft now only requires a simple right-hand threaded hole, while the lock nut incorporates both the right-hand thread engagement with the shaft and the left-hand thread engagement with the nose piece. This extraction simplifies the rotary shaft processing significantly while maintaining the directional fixation capability through the lock nut's dual-thread design

The lock nut acts as an intermediary that absorbs the complexity of dual-threaded connections. Instead of machining both right-hand and left-hand threads directly into the rotary shaft, the lock nut mediates by providing the left-hand thread interface for the nose piece while engaging the right-hand thread on the shaft, thereby simplifying the shaft processing to a single thread type