Calculation method for optimal chain distance of scraper blade
A calculation method and scraper technology, applied in calculation, computer material science, computer-aided design, etc., can solve problems such as constant double-chain scraper chain distance, affecting mine mining and transportation efficiency, equipment and personnel safety hazards, etc.
Pending Publication Date: 2022-01-18
CHINA COAL ZHANGJIAKOU COAL MINING MACHINERY
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Problems solved by technology
In recent years, with the large-scale development of mining and transportation equipment, the groove width of the scraper conveyor has been continuously increased, and the scraper has also been lengthened. However, the distance between the middle and double chain scrapers is basically unchanged, or some equipment blindly uses side double chains. As a result, the scraper frequently bends or even breaks, which seriously affects the efficiency of mine mining and transportation, and at the same time brings certain safety hazards to equipment and personnel
At present, there is no calculation method for the scraper chain distance, so there are certain human factors in the determination of the scraper chain distance, which belongs to the blank area of calculation
Method used
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Embodiment Construction
[0034] Below in conjunction with example application further illustrate the essence of the present invention:
[0035] Taking the SGZ1200 / 1000 conveyor for open-pit mine as an example, the length of the scraper , scraper chain distance , the rated pull of a single chain . Assuming that the motor is output at full power and the chain tension acts on a scraper, the bending moment at the chain distance of the scraper can be obtained from equation (4) ; If the optimal chain distance of the scraper is used, the optimal chain distance is ,Depend on image 3 It can be known that the bending moment at the chain distance of the scraper , the maximum bending moment of the scraper is reduced by 71%.
[0036] It can be seen that with the optimal chain distance, the stress state of the scraper will be greatly reduced.
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The invention discloses a calculation method for an optimal chain distance of a scraper blade, which comprises the following steps of: establishing a scraper blade bending moment equation and drawing a scraper blade bending moment distribution diagram by using knowledge learned by material mechanics according to the stress analysis of the scraper blade; the optimal chain distance equation of the scraper blade is determined according to the scraper blade bending moment distribution diagram, that is, when the bending moment at the scraper blade chain way is equal to the negative value of the middle bending moment of the scraper blade, the maximum bending moment borne by the scraper blade is the minimum, that is, the chain distance at the moment is the optimal chain distance, the optimal chain distance can be calculated according to the equation, and a maximum bending moment change diagram of the scraper blade with different chain distances is drawn. The optimal chain distance calculated through the method is suitable for a well industrial and mining crossheading scraper blade reversed loader and an open-air scraper blade conveyor. By adopting the chain distance, the stress state of the scraper blade can be reduced to the minimum, the safety coefficient of the scraper blade is improved, the service life of the scraper blade is prolonged, and the chain distance has great popularization and application value.
Description
technical field [0001] The invention relates to the technical field of scraper conveyor design, in particular to a calculation method for the optimal chain distance of scraper conveyors. Background technique [0002] Scraper conveyors are widely used in the coal industry, including underground mines, open-pit mines, power plants, coal preparation plants, etc., and are responsible for the transportation and reloading of coal. Among them, the scraper chain is an important part of the transmission system, which is related to the operating efficiency of the scraper conveyor. In recent years, with the large-scale development of mining and transportation equipment, the groove width of the scraper conveyor has been continuously increased, and the scraper has also been lengthened. However, the distance between the middle and double chain scrapers is basically unchanged, or some equipment blindly uses side double chains. As a result, the scraper frequently bends or even breaks, whic...
Claims
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IPC IPC(8): G06F30/20G16C60/00B65G19/22G06F119/04G06F119/14
CPCG06F30/20G16C60/00B65G19/225G06F2119/04G06F2119/14
Inventor 翟学军付之有祁怀强罗宏伟高霞杨存灵孙长鹤牛强戈金培关达宇
Owner CHINA COAL ZHANGJIAKOU COAL MINING MACHINERY