Integral type displacement compensation elastic part for tail shaft sealing device and manufacturing method of integral type displacement compensation elastic part

Abstract

The invention relates to an integral type displacement compensation elastic part and a manufacturing method thereof. The integral type displacement compensation elastic part is characterized in that the elastic part is a ring body formed by multiple layers of multiple omega-shaped narrow springs, the seams of the omega-shaped narrow springs are staggered, covered and overlaid, a cloth reinforcing layer is laid between the outmost layer and the layer adjacent to the outmost layer, and a cloth reinforcing layer is laid between the innermost layer and the layer adjacent to the innermost layer; the outer surface of the elastic part is coated with a high-molecular adhering coating; the overlaid layers are compacted through grooves formed in two sides of the lower portion of each omega-shaped narrow spring. The integral type displacement compensation elastic part and the manufacturing method thereof have the advantages that the elastic part is integral, traditional welded connection or fastener connection is not used, the adhering and wrapping method is used, the cloth reinforcing layers are arranged, and integral bonding strength of the elastic part is enhanced. During overlaying, a certain gap is formed between every two adjacent layers except for the grooves, elastic adhering is conducted on the exposed surface of the innermost layer and the exposed surface of the outmost layer, welded connection, fastener connection and other rigid connection are not used, and therefore when displacement deformation of the elastic part occurs, the springs of each layer cannot rub or interfere in one another, and rigidity changing stabilization is guaranteed.

Description

technical field [0001] The invention relates to an integral displacement compensating elastic part for a marine stern shaft sealing device and a manufacturing method thereof. In particular, the laminated structure of the elastic member utilizes multiple multi-layered narrow leaf springs stacked into a large-diameter torus, and is formed into a solid whole by coating an adhesive coating. Background technique [0002] At present, there are three types of marine stern shaft water lubrication sealing devices: stuffing box seal, lip rubber seal and end face seal. Most of the end face seal structures use helical compression springs as displacement compensation elastic parts. On the circumference of the sealing pair, the structure is complex, and it can only compensate the small axial displacement of the stern shaft, but cannot compensate the radial displacement of the stern shaft. The stern shaft sealing device used in the present invention adopts an integral displacement compens...

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Problems solved by technology

[0003] The manufacturing process of the existing integral displacement compensating elastic parts, such as figure 1 The traditional structure shown is a method of stacking two layers of spring sheets and then connecting them by butt welding. The welding points of this manufacturing method will change the local chemical composition and mechanical properties of the material, resulting in deformation and internal stress, and reduce the overall displacement compensation. performance and reliability

The welding method can only carry out two-layer welding operations. If it is necessary to increase the stiffness of the elastic member, the stiffness of the elastic member is generally increased by increasing the thickness of the steel plate. However, the increase in thickness will increase the stress on the surface of the elastic member, which limits the Elastic parts adapt to larger compression displacement and displacement compensation

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