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Thermal spraying ceramic insulating coating and preparation method thereof

A technology of ceramic insulation and thermal spraying, applied in coating, metal material coating process, melt spraying and other directions, can solve the problems of low withstand voltage, difficult to bear high-speed load, poor bonding strength, etc., to achieve good product quality, Low production cost, excellent insulation and temperature resistance

Pending Publication Date: 2021-03-09
安徽盈锐优材科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the current insulating bearings usually use plasma spraying process to spray aluminum oxide coating on the surface, which has problems such as poor bonding strength, low withstand voltage strength, and difficulty in bearing high-speed loads. Therefore, we propose a thermal spraying ceramic insulating coating and its preparation method

Method used

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  • Thermal spraying ceramic insulating coating and preparation method thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] The invention provides a thermal spraying ceramic insulating coating, the thermal spraying ceramic insulating coating comprises a primer layer, a potassium titanate intermediate layer and an aluminum oxide surface layer, the primer layer is located on the outer surface of the substrate, the titanium The potassium oxide intermediate layer is located on the bottom layer, and the alumina surface layer is located on the potassium titanate intermediate layer;

[0032] The bottom layer is formed by plasma spraying process, and its thickness is 50-100 μm;

[0033] The intermediate layer is formed of potassium titanate powder by plasma spraying process, and its thickness is 100-200 μm;

[0034] The surface layer is formed from alumina powder by plasma spraying process, and its thickness is 200-1000 μm.

[0035] Wherein, the primer layer is set to be one of nickel-chromium-molybdenum composite powder, nickel-clad aluminum, nickel-chromium-aluminum composite powder and molybdenu...

Embodiment 2

[0052] The difference from Example 1 is that 24 mesh zirconium corundum is used for sandblasting, and the surface roughness is Ra=8μm; the bottom layer is sprayed with nickel-chromium-molybdenum composite powder with a thickness of 50μm; Potassium powder is sprayed with a thickness of 100μm; the thickness of the insulating surface layer is 200μm.

[0053] The insulation performance is: withstand voltage 2500V, resistance value> 200ΩM; bonding strength 65MPa.

Embodiment 3

[0055] The difference from Example 1 is that the roughness of the surface is Ra=10 μm; the thickness of the base layer is 75 μm; the thickness of the intermediate layer potassium hexatitanate is 150 μm; the thickness of the insulating surface layer is 500 μm.

[0056] The insulation performance is: withstand voltage 6400V, resistance value> 200ΩM; bonding strength 61MPa.

[0057] To sum up: the present invention uses potassium titanate as the filter layer, which can form a completely dense coating structure, preventing corrosion or electrolyte from entering the interior of the coating; the good heat insulation performance of potassium titanate can prevent frictional heat from being conducted to the substrate; using Neutral alumina sol or neutral silica sol can replace epoxy resin or silicone sealing agent, which has better insulation and temperature resistance; the ceramic insulating coating structure prepared by the preparation method of thermal spraying ceramic insulating coa...

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Abstract

The invention discloses a thermal spraying ceramic insulating coating. The thermal spraying ceramic insulating coating comprises a priming coat, a potassium titanate middle layer and an aluminum oxidesurface layer. The priming coat is located on the outer surface of a base body, the potassium titanate middle layer is located on the priming coat, the aluminum oxide surface layer is located on thepotassium titanate middle layer, the priming coat is formed by a plasma spraying process, the thickness of the priming layer is 50-100 micrometers, the middle layer is formed by potassium titanate powder by the plasma spraying process, and the thickness of the middle layer is 100-200 micrometers. Compared with a traditional solid product, the thermal spraying ceramic insulating coating has the beneficial effects that potassium titanate is used as a filtering layer, a completely-compact coating structure can be formed, corrosion is avoided, or electrolyte is prevented from entering the coating,heat generated by friction can be prevented from being conducted to the base body due to the good heat insulating performance of the potassium titanate, neutral aluminum sol or neutral silica sol isadopted for replacing epoxy resin or an organic silicon hole sealing agent, and the insulation and the temperature resistance are better.

Description

technical field [0001] The invention belongs to the field of ceramic insulating coatings, and more particularly, particularly relates to a thermal spraying ceramic insulating coating. At the same time, the invention also relates to a preparation method of the thermal sprayed ceramic insulating coating. Background technique [0002] A motor is a device that converts electrical energy into mechanical energy. It uses the energized coil, that is, the stator winding, to generate a rotating magnetic field and act on the rotor to form a magnetoelectric rotational torque. Any imbalance in the phase currents can generate magnetic flux linkages in the rotating system. When the shaft rotates, these flux linkages can generate a potential difference across the shaft. This potential difference is called the shaft voltage. The shaft voltage can pass through the bearings at both ends. The circulating current is excited in the loop (closed circuit) formed by the casing and the casing, which...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C4/134C23C4/08C23C4/11C23C4/18
CPCC23C4/134C23C4/08C23C4/11C23C4/18
Inventor 李朝雄黄新春王卫泽黄新谊黄章峰
Owner 安徽盈锐优材科技有限公司
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