1 Energy-saving technical measures in design
From a design perspective, energy saving in the compact spinning system should be achieved from two aspects: the negative pressure system and the drafting system.
1.1 Negative pressure system design
We should focus on the design of the cross-sectional shape and material of the main air duct to ensure the smoothness of the inner surface of the air duct, and there should be no hanging flowers in the air duct. According to the test results, the use of octagonal cross-section and engineering plastics is beneficial to reducing the wind resistance of the main air duct; the branch air duct should be designed along the tangential direction of the air flow to avoid air convection; use high-voltage energy-saving fans and power-saving motors; design exchangeable For the air suction port, different air suction groove shapes and openings should be selected according to different fibers and yarn counts; the number of mesh loops should match the variety being spun, etc.
In addition, we should focus on how to use the relationship between the fan’s speed and flow, speed and total pressure, speed and power to achieve energy-saving effects. For example, reducing the negative pressure, increasing the flow rate, and making the whiskers roll sideways through the thrust of the side air inlet can reduce energy consumption while ensuring the tight effect. According to calculations, configuring fans with large air volume and low pressure to change the current situation of high wind pressure and low air volume can reduce the energy consumption of the fans by 30%.
We should also pay attention to the efficiency of the negative pressure fan in compact spinning. Some of the so-called energy-saving fans currently on the market are actually not very efficient. When choosing a fan, you must pay attention to high-efficiency performance. For example, the weight of the impeller will have a great impact on the energy consumption of the fan. Choose one with light weight, high strength, and low surface friction coefficient. Materials used to make fan blades. The surface treatment of the negative pressure tube and the smoothness of the inner surface of the grid circle will also have a certain impact on energy consumption and machine material consumption.
1.2 Drafting system design
The driving mode of the small accumulation roller and the setting of the cradle pressure directly affect energy consumption. It is recommended to design an adjustable cradle and set different cradle pressures according to different production varieties.
2 Energy-saving technical measures in use
Increasing production capacity is the best energy-saving measure. When the energy consumption of other projects is basically fixed, increasing the production capacity per unit time as much as possible can effectively reduce the energy consumption per ton of yarn.
According to the characteristics of compact spinning that there is no yarn guide movement or the yarn guide movement is very small, reducing the width of the top roller, for example, reducing the width of the top roller to only 20.5mm not only reduces the cost of the use of the cot roller, but also reduces the pressure as long as 12-15 kg can meet the usage requirements, which can effectively reduce energy consumption and machine material consumption.
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