Manufacturing method of ceramic bracket for magnetic suspension variable frequency centrifuge coil

Abstract

The invention relates to a manufacturing method of a ceramic bracket for a magnetic suspension variable frequency centrifuge coil. The method includes the steps of: 1. stirring aluminium oxide, calcium oxide, niobium pentoxide, calcium carbonate and suzhou clay powder evenly according to a predetermined proportion, and conducting drying in a drying oven to a water content of less than or equal to 0.03%; 2. putting the uniformly mixed mixed powder into a ball mill to carry out ball milling to a particle size measurement value of 2.0-4.0micrometers; 3. adding white wax accounting for 8-13% of the mixed powder weight and yellow wax accounting for 0.2-0.6% of the mixed powder weight into the ball milled mixed powder to make a wax cake; 4. using a hardware mould to process the wax cake into a ceramic bracket green body for the magnetic suspension variable frequency centrifuge coil by means of hot press molding; 5. fixing the ceramic bracket green body in a sagger with adsorption powder and sending the green body into a wax removal kilin to remove wax; and 6. loading the wax removed and ash removed ceramic bracket green body into a corundum earthen bowl tidily and sending the corundum earthen bowl into a continuous sintering kiln to conduct high temperature sintering, and finally performing natural cooling, thus obtaining the ceramic bracket for the magnetic suspension variable frequency centrifuge coil.

Description

technical field [0001] The invention relates to the technical field of magnetic levitation frequency conversion centrifuges, in particular to a method for manufacturing a ceramic bracket for magnetic levitation frequency conversion centrifuge coils. Background technique [0002] With the development of centrifugal air-conditioning technology in China, the key components and technologies of magnetic levitation frequency conversion centrifugal units have broken the pattern of long-term dependence on imports, and major breakthroughs have been made in energy efficiency and safety. Many motors in air conditioners need to install coils, especially in magnetic levitation variable frequency centrifuges, which need a high insulation, high temperature resistant, high strength support to wind these copper coils. Currently, these insulating brackets are usually made of high-temperature plastic or insulating paper materials. [0003] During the operation of the centrifuge, current conti...

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Problems solved by technology

[0003] During the operation of the centrifuge, current continues to pass through the winding, and the rotating mechanical movement, coupled with the combined effects of dust, oil and other corrosive substances in the working environment, the coil bracket made of ordinary insulating plastic or insulating paper materials is anti-aging Poor performance, its insulation resistance is 1×10 9 Ω or less, and the heat resistance is poor, which cannot meet the requirements of long-lasting large working current environment

When the motor works for a long time, the internal temperature rises rapidly, especially the impact of the instantaneous current on the power grid caused by the short circuit of the load. If the insulation or strength of the coil support is poor, the magnetic field of the motor will be disturbed and the service life of the motor will be reduced or it will be directly burned. Increased maintenance and repair costs, resulting in unstable and unsafe centrifuges

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