A powder feeding mechanism, powder feeder and spraying equipment

Abstract

The invention discloses a powder feeding mechanism, a powder feeding device and spraying equipment. The powder feeding mechanism includes a powder storage cavity (1), and a powder inlet (10) and a heating gas inlet are arranged above the powder storage cavity (1). (11), the powder storage cavity (1) is provided with a stucco, and the stucco includes a rotating body (3) and a brush body (2) fixed on the rotating body (3); Driven by the drive, it rotates along the rotation axis (4); there is a screen (5) under the paint, and the screen (5) is connected to the powder storage cavity (1); the brush body (2) protruding from the paint surface touches the powder storage The inner surface of the cavity (1) is matched with different brush body materials for powders of different particle sizes. The present invention can precisely control the powder feeding rate, realize a small amount of uniform powder feeding, and increase the range of powder feeding particle sizes. There is no requirement for fluidity, and it is suitable for the transportation of various powders.

Description

technical field [0001] The invention belongs to the field of thermal spraying equipment, and in particular relates to a powder feeding mechanism, a powder feeding device and spraying equipment. Background technique [0002] Thermal barrier coatings (TBCs for short) is a high-temperature thermal protection technology that uses high-temperature resistant, low thermal conductivity, and corrosion-resistant ceramic materials to compound with alloys in the form of coatings to reduce the surface temperature of alloys in high-temperature environments. The use of TBCs on engine blades can significantly increase the operating temperature of the engine, thereby increasing the working efficiency and thrust of the engine, and at the same time can reduce the working temperature of the turbine blade alloy by 30~150°C, thereby greatly improving the life and reliability of the engine. [0003] The development of preparation technology has promoted the development of TBCs. Plasma spraying (PS...

AI Technical Summary

Problems solved by technology

Because if the powder has good fluidity, the powder will flow out directly from the leak hole of the screen due to gravity, and the powder flow rate cannot be controlled

[0011] In addition, considering that powders of different sizes are used in the same spraying equipment, traditional powder feeding mechanisms are often only suitable for powder particles of a specific size

Therefore, it is necessary to match a variety of different powder feeding mechanisms, which not only increases the equipment cost, but also reduces the production efficiency due to the replacement and maintenance of the powder feeder

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