Shockproof pump shaft assembly for magnetic drive pump and magnetic drive pump

Abstract

The invention relates to a shockproof pump shaft assembly for a magnetic drive pump and the magnetic drive pump. The shockproof pump shaft assembly comprises a pump shaft, the side face of the outer circle of the pump shaft is sleeved with a shaft sleeve, a rubber piston ring is arranged between the shaft sleeve and the side face of the outer circle of the pump shaft, and the side face of the outer circle of the rubber piston ring is formed by combining an inner ring face and an outer arc face, so that the section outline of the rubber piston ring is D-shaped; an annular groove is formed in the side face of the outer circle of the pump shaft, the inner ring face of the rubber piston ring is attached to the ring face of the annular groove, and the outer arc face of the rubber piston ring protrudes out of the annular groove to provide elastic support for the shaft sleeve; and a cooling flow channel is arranged in the pump shaft and penetrates through the pump shaft in the central axis direction of the pump shaft, and an oil hole is formed in the side face of the outer circle of the side face of the pump shaft and can be communicated with the side face of the outer circle of the pumpshaft and the cooling flow channel.

Description

Technical field [0001] The present disclosure belongs to the technical field of magnetic pumps, and specifically relates to a shock-proof pump shaft assembly for a magnetic pump and a magnetic pump. Background technique [0002] There are two types of connection between the shaft sleeve and the shaft in the magnetic pump: a rigid connection, that is, direct contact between the shaft sleeve and the shaft; the second is a flexible connection, that is, a metal supporting ring. Using the principle of metal elasticity and memory, it is installed between the pump shaft and the shaft sleeve. The expansion ring relies on its own elastic force to drive the shaft sleeve to move together through friction. [0003] The inventor believes that the current magnetic pump shaft assembly has the following shortcomings: [0004] 1. The metal support ring is a thin-shaped object, which is difficult to process, cannot achieve high concentricity, and has a low degree of fit with the shaft sleeve and poor...

AI Technical Summary

Problems solved by technology

[0004] 1. The metal support ring is a sheet-like object, which is difficult to process and cannot achieve a high concentricity. The fit with the shaft sleeve is low and the dynamic balance is not good

[0005] 2. Magnetic pumps are generally used in high-temperature and corrosion-resistant working conditions, and the material requirements for the shaft sleeve support expansion ring are particularly high. Since the shaft sleeve expansion ring is in a running state, especially the shaft sleeve expansion ring is in the narrow space between the shaft sleeve and the shaft. In the space, it is more prone to corrosion and dirt deposition

After a period of use, the shaft sleeve support ring fails

[0006] 3. The installation operation is complicated. During the process of pressing the shaft sleeve into the supporting expansion ring, it is very easy to cause damage to the shaft sleeve. At the same time, in the later maintenance process of the magnetic pump, it is difficult to disassemble. Choosing to disassemble will cause unnecessary maintenance losses

[0007] 4. In a rubber expansion ring known to the inventor, it is formed by enclosing three toroids and an outer arc surface, and the inner torus of the three torus fits with the inner torus of the annular groove. The outer ring surface of the first ring surface fits the side ring surface of the annular groove, and the part participating in the elastic deformation is only the outer arc surface, which makes the annular groove must be deep enough, and the rubber expansion ring cannot provide enough elastic surplus. amount, it may cause wear between the sleeve and the pump shaft

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