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Cavitation-resistant and energy-saving modification method of water turbine

An energy-saving transformation and anti-cavitation technology, which is applied to mechanical equipment, hydroelectric power generation, engine components, etc., can solve the problem of high cost of shutdown and maintenance, and achieve the effects of improving efficiency, high strength and toughness, and preventing corrosion

Active Publication Date: 2011-11-23
深圳市百安百科技有限公司
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AI Technical Summary

Problems solved by technology

Since the water turbine is the core of the hydropower station equipment, the cost of shutdown and maintenance is high, and the industry is in urgent need of a technical solution that can increase the cavitation or abrasion resistance of the water turbine and extend the overhaul period

Method used

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  • Cavitation-resistant and energy-saving modification method of water turbine
  • Cavitation-resistant and energy-saving modification method of water turbine
  • Cavitation-resistant and energy-saving modification method of water turbine

Examples

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Effect test

Embodiment Construction

[0122] The invention provides a water turbine anti-cavitation energy-saving transformation method, which includes the following steps:

[0123] Step 1: Do sandblasting treatment on the entire runner and blades, which requires Sa2.5 level;

[0124] Step 2: Use titanium-containing stainless steel inlay repair method or scrape coating nail-planting polyurethane elastomer method to repair the cavitation pits of the turbine runner, blade and draft tube lining;

[0125] The titanium-containing stainless steel inserting method in this step includes the following steps:

[0126] a. Clean the large cavitation pits that have been sandblasted;

[0127] b. Take a piece of paper and stick it on the cavitation pit, and draw the outline of the cavitation pit with a pen;

[0128] c. Make 321 titanium stainless steel spare parts according to the pattern drawn on the paper, the size of the spare parts should be smaller than the pattern to facilitate installation;

[0129] d. Use tapping method or tight fix...

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Abstract

The invention provides a cavitation-resistant and energy-saving modification method of a water turbine. The method provided by the invention comprises the following steps: (1) carrying out sand blasting on the whole rotating wheel, blades and the lining of a draft tube and requiring to reach an Sa2.5 level; (2) repairing cavitation pits on the rotating wheel of the water turbine, the blades and the draft tube by adopting a titaniferous stainless steel inlaying method or a nano plastic steel polyurethane elastomer scraping method after nails are planted; and (3) coating a nano plastic steel 8103 wear-resistant and cavitation-resistant coating and a nano plastic steel 8102 ultra-smooth coating. The cavitation-resistant and energy-saving modification method provided by the invention is used for repairing the abrasion-resistant and cavitation-resistant components of the water turbine and coating the whole flow passage component, thereby improving the cavitation-resistant and abrasion-resistant capabilities of the water turbine, increasing the power execution and prolonging the overhaul period.

Description

Technical field: [0001] The invention relates to the technical field of water turbines, and in particular to a method for anti-cavitation and energy-saving transformation of water turbines. Background technique: [0002] The flow parts of the turbine are eroded by sand due to long-term work, and the abrasion and cavitation conditions coexist and promote each other, especially the abrasion and cavitation conditions at the root of the turbine blade and the position of the draft tube are more serious. Abrasion and cavitation will reduce the output and efficiency of the turbine, severely cause blade perforation, and the unit will produce strong vibration, noise and load fluctuations, which will cause the unit to fail to operate safely and stably. [0003] The current general treatment method for the abraded and cavitation parts of the turbine is to repair the lighter cavitation and abrasion parts by surfacing or metal thermal spraying during the overhaul of the turbine unit. There are ...

Claims

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Application Information

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IPC IPC(8): F03B11/04C08L75/06C08L63/00C09D163/00
CPCY02E10/226Y02E10/20Y02P20/10Y02P70/50
Inventor 鲁毅
Owner 深圳市百安百科技有限公司
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