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Application of a diamond-like film on the impeller

A technology of diamond film and impeller, which is applied in the coating process of metal materials, components of pumping devices for elastic fluids, gaseous chemical plating, etc., can solve the problems of fan impeller channel fouling, etc., and achieve simple equipment, Low coefficient of friction, easy handling effect

Inactive Publication Date: 2011-11-30
SHENYANG BLOWER WORKS GROUP CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to solve the fouling problem in the flow channel of the fan impeller, and to provide an application of a diamond-like film on the impeller

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Coating is divided into two steps: the outer surface of the impeller and the inner coating of the flow channel.

[0020] When coating the outer surface of the impeller, first clean the impeller as a whole with Ar ions for about 120 minutes, use a voltage of 5KV (adjustable according to the size of the vacuum furnace and the size of the impeller), and the Ar pressure is about 15 millitorr; then the flow channel is sealed with aluminum foil. Use Ar ions to clean the outer surface of the impeller, the voltage is 3.5-5KV (adjustable according to the size of the vacuum furnace and the impeller), the Ar pressure is 15 millitorr during cleaning, and the cleaning time is 120 minutes; then the outer surface is coated with a transition layer, after Comparison of various transition layer gases Finally, TMS is selected as the transition layer gas to generate the SiC transition layer, the voltage is selected as 5KV, the air pressure is about 15 mTorr, and the transition layer plating...

Embodiment 2

[0026] A one-time DLC coating is applied to the impeller as a whole. The impeller is made of KMN material. In this process, we use another patented technology of the Southwest Research Institute of the United States: a wire mesh cover is placed around the impeller. The distance between the net cover and the surface of the impeller is 80 mm, and the diameter of the metal wire is about 0.3 mm. The application of the net cover type coating can increase the ion density in the net cover, enhance the uniformity of the electric field, avoid arc discharge, and then realize the one-time coating of the whole impeller. The specific process and parameters are as follows:

[0027] First, the impeller in the vacuum furnace is cleaned with Ar ions as a whole. The selected voltage is 5.3 kV, the cleaning time is 150 minutes, and the Ar pressure is 15 millitorr. After ion cleaning, TMS gas is introduced, and the discharge voltage is maintained at 5.3 kV. During this period, the pressure of TM...

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Abstract

The invention relates to a fan, in particular to the application of a diamond-like film on an impeller. The diamond-like carbon film is used as a coating, which is plated on the flow channel of the impeller. The present invention adopts the omni-directional plasma injection method on the inner wall of the irregular shape such as the impeller, and coats the diamond-like film on the inner wall of the irregular shape, so that the inner surface of the irregular shape can be uniformly realized, and avoids the influence of some conventional surface heat treatment on the shape of the product, etc. Restriction, and the uniform coating of DLC film inside the impeller flow channel can effectively improve the service life and efficiency of the impeller while avoiding the problem of regular online cleaning.

Description

technical field [0001] The invention relates to a fan, in particular to the application of a diamond-like film (DLC) on an impeller. Background technique [0002] In the design of centrifugal compressors, it is sometimes difficult to find a material that can meet all the conditions of a specific working condition and also has good cost performance, so applicants often use various surface coating methods to solve this problem; that is, make full use of two It can be achieved through the combination performance of more or more materials, and also through some surface strengthening treatment to replace the higher-priced materials with lower-priced base materials to reduce costs. There are generally problems such as corrosion, erosion and fouling in the flow parts of centrifugal compressors. Corrosion comes from the liquid or gas of the working fluid; erosion comes from the solid particles or droplets in the working fluid; scaling comes from the dust, salt or polymerization rea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F04D29/28C23C16/27C23C16/50
Inventor 王学军戴继双包翠敏魏荣华雍兴平邱大伟
Owner SHENYANG BLOWER WORKS GROUP CORP
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