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Wear and corrosion resisting repair method for draught fan

A repair method and fan technology, applied in the field of wear-resistant and anti-corrosion repair of fans, can solve the problems of deformation of the operating surface, high cost, hidden danger of fan use, etc., and achieve the effects of reducing vibration, improving anti-corrosion ability, and reducing costs.

Inactive Publication Date: 2016-08-10
上海易乓乒智能科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Common replacement methods include overall replacement or replacement of partial parts, and the cost is often high. Conventional thermal repair methods such as welding can effectively restore damage such as holes on metal workpieces, but the process of thermal welding repair will be in operation. Surface deformation and internal stress will cause major hidden dangers to the use of fans

Method used

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  • Wear and corrosion resisting repair method for draught fan

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The repair method of fan wear-resistant and anti-corrosion includes the following steps:

[0042] S1. Descaling and cleaning: Use a shovel, brush or grinder to remove oil, rust and dirt on the surface of the fan casing and impeller until they are clean. This process is not required for new casings and impellers.

[0043] S2. Sandblasting or shot blasting: After cleaning the casing and impeller, perform sandblasting / shot blasting treatment to make the surface bright, the cleanliness can reach Sa2.5 level, and the roughness can reach the standard of 75 microns (above 75 μm).

[0044] S3. Cleaning and drying: Clean all surfaces of the casing and impeller after sandblasting with a degreasing detergent or an environmentally friendly water-based cleaning agent until it is clean and free of dirt, and then dry by itself. The degreasing detergent can be selected from Loctite, KCC and other brands of products.

[0045] S4. Wet primer: use ceramic protective agent (for example: Lo...

Embodiment 2

[0079] The method of wear-resistant and anti-corrosion repair of industrial fans,

[0080] a. Clean the surface of the fan casing, impeller and other components to remove all oil and dirt on the surface of the workpiece;

[0081] b. Surface sandblasting and derusting treatment, so that the metal surface roughness reaches the standard of 6.3;

[0082] c. Surface cleaning and drying treatment, the workpiece after sandblasting is fully cleaned with a special cleaning agent, the cleanliness reaches Sa2.5, and dried;

[0083] d. Wet priming treatment, using ceramic fiber paint to perform priming on the cleaned surface to fill the gaps in the operating surface;

[0084] e. Defect repair treatment, use wear-resistant repair agent containing chromium molybdenum tiny particles (such as epoxy resin of chromium molybdenum alloy) for defect repair, and the repair surface is slightly higher than the original base surface;

[0085] f. Drying and curing treatment, use iodine tungsten lamps...

Embodiment 3

[0090] The repair methods for fan wear and corrosion include:

[0091] (1) Descaling and cleaning the damaged and polluted impeller workpieces. Use special metal cleaning agents and descaling tools to remove dust and rust on the surface of metal impeller workpieces, and remove oily impurities, so that the surface of impeller workpieces that needs to be repaired meets the basic requirements for operability.

[0092] (2) Sandblasting or shot peening. After the impeller workpiece is dried in the shade, stick the matching surface with adhesive tape, and perform sandblasting or shot blasting on the surface of the metal workpiece, so that the repaired surface of the workpiece can further meet the needs of the operation.

[0093] (3) Wash and dry. The surface of the workpiece is cleaned again with a special metal cleaner, and the drying operation is performed with a hot air blower.

[0094] (4) Moist base. Brush the ceramic protective agent on all surfaces of the impeller to make...

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Abstract

The invention discloses a wear and corrosion resisting repair method for a draught fan. The method comprises the process of descaling cleaning, sand blasting or shot blasting, cleaning and drying, wetting bottoming, cleaning and drying, defect repair, wear resisting repair, drying curing, grinding and polishing, impeller dynamic balancing, cleaning and drying, smearing of a first layer of finishing coat, drying curing, smearing of a second layer of finishing coat, drying curing and repair finishing. The wear and corrosion resisting repair method has the beneficial effects that the repair technology is superior to conventional welding repair and machining repair manners, deformation is avoided, no internal stress is generated, the aims of restoring the equipment use function and prolonging the service life are achieved, and the effects of reducing cost and achieving environment friendliness and energy saving are also achieved.

Description

technical field [0001] The invention relates to the field of fan repair, in particular to a repair method for fan wear and corrosion. Background technique [0002] During long-term use, industrial fans are often damaged to varying degrees due to dust accumulation, wear or corrosion, and need to be repaired or renewed after reaching a certain level. At present, the common maintenance methods are mainly replacement or welding, processing and so on. [0003] Common replacement methods include overall replacement or replacement of partial parts, and the cost is often high. Conventional thermal repair methods such as welding can effectively restore damage such as holes on metal workpieces, but the process of thermal welding repair will be in operation. Surface deformation and internal stress will cause major hidden dangers to the use of fans. Contents of the invention [0004] The purpose of the present invention is to provide a repair method for fan wear-resistant and anti-c...

Claims

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Application Information

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IPC IPC(8): B23P6/00
CPCB23P6/00
Inventor 高锋吕永臣王建康
Owner 上海易乓乒智能科技股份有限公司
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