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Can for magnetically coupled pumps and production process

A container and ferroalloy technology, which is applied to parts, pumps, and pump devices of elastic fluid pumping devices, can solve the problems of reducing the service life of the container, reducing the safety factor, and achieving high heat resistance.

Active Publication Date: 2015-09-23
KLAUS UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A narrow gap and / or a very tight design of the wall thickness of the vessel with respect to the minimum width of the gap offers advantages in terms of the degree of efficiency, especially in minimizing drive losses, but this also reduces the safety factor and may also reduce the service life of the container, the fluid depends on the container delivery

Method used

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  • Can for magnetically coupled pumps and production process
  • Can for magnetically coupled pumps and production process
  • Can for magnetically coupled pumps and production process

Examples

Experimental program
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Embodiment Construction

[0106] figure 1 Typical short-term properties of Inconel in solution annealed and hardened conditions are shown as a function of temperature in °C. It can be seen from the graph that fairly constant mechanical properties prevail in the temperature range from room temperature up to 600°C, this applies especially to the elongation at break (A5) and shrinkage (Z), resulting in a good dimensional Advantages are provided in terms of stability.

[0107] figure 2 Shows typical creep strength of Inconel in solution annealed and hardened condition as a function of time in hours, where time is logarithmically divided and creep strength is plotted on the y-axis in N / mm 2 marked. It can be seen from the chart that even more than 10 5 Hours of time (equivalent to well over 11 years), at temperatures below 500°C there is little perceptible loss of mechanical properties.

[0108] image 3 A container 1 is shown which is configured symmetrically with respect to an axis of symmetry S ...

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Abstract

Magnetically coupled pumps use cans which have a side wall arranged in a gap between a driver and a rotor of the pump. With a view to good efficiency of the pump, the gap should be as narrow as possible, which can only be achieved with a side wall of a thin wall thickness. In this case, the can must be of a sufficiently great strength, in particular to withstand the differences in pressure in the pump. At the same time, it must be possible for the can to be shaped into a desired geometry in a simple way and to have a high degree of dimensional stability, even under high pump pressures. It is proposed to make a can (1) with a side wall (3) that consists at least partially of a material with a nickel component, wherein the material is a nickel-chromium alloy comprising at least 50 percent by weight of nickel and 17 to 21 percent by weight of chromium, and to harden the side wall (3) by a heat treatment. This allows a can (1) that is very resistant to corrosion and / or high temperatures to be provided in a simple way.

Description

technical field [0001] The invention relates to a container for arrangement in the gap between a drive and a rotor of a magnetically coupled pump, and also to a method for producing the container. Background technique [0002] For conveying liquids, particularly in the chemical industry, high demands are placed on the tightness of conveying lines and pumps in most applications. At the same time, a high degree of pump efficiency must be ensured. Pumps equipped with only static seals (ie, pumps without shaft seals) can be constructed to be highly impervious to liquid penetration. The magnetically coupled pump can be statically sealed by arranging a stationary container between the drive on the input drive side and the magnetically driven rotor on the output drive side and around the rotor. The container is arranged in the magnetic field between the drive and the rotor, and the magnetic force is transmitted through the container. A pump pusher can be coupled to the rotor. T...

Claims

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Application Information

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IPC IPC(8): F04D13/02C22C19/05F04D29/02
CPCF04D13/025C22C19/055F04D29/026C22F1/10C22C19/05F04D13/0626F04D29/02
Inventor T·埃施内尔
Owner KLAUS UNION
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