Container and method of manufacture for magnetically coupled pump
A container and ferroalloy technology, which is applied to the components, pumps, and pump devices of the pumping device for elastic fluids, can solve the problems of reducing the service life of the container, reducing the safety factor, etc., and achieves the effect of high heat resistance
Active Publication Date: 2018-07-13
KLAUS UNION
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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
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[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 a vessel with walls disposed in the gap between the pump's driver and rotor. With a view to good efficiency of the pump, the gap should be as narrow as possible, which can only be achieved with side walls of thin wall thickness. In this case, the container must be sufficiently strong, in particular to withstand the pressure difference in the pump. At the same time, it must be possible to shape the container into the desired geometry in a simple manner and to have a high degree of dimensional stability, even at high pump pressures. It is proposed to make a container (1) using a side wall (3) comprising a material at least partially having a nickel composition, wherein the material is a nickel-chromium alloy comprising at least 50% by weight of nickel and 17% to 21% by weight of chromium, And the side wall (3) is hardened by heat treatment. This makes it possible to provide in a simple manner a container (1) which is very resistant to corrosion and / or high temperatures.
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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IPC IPC(8): F04D13/02C22C19/05F04D29/02
CPCF04D29/026C22C19/055C22F1/10C22C19/05F04D13/025F04D13/0626F04D29/02
Inventor T·埃施内尔
Owner KLAUS UNION