High-aluminum balls are widely used in the fine grinding industry of ceramics, quartz, kaolin and other materials. The original application in the cement industry is not much. In the cement industry, manganese steel balls were generally used, and only some high-alloy balls were used in the high-end cement industry. Compared with high-aluminum balls, manganese steel balls are twice as dense as high-aluminum balls, have high grinding efficiency, but have large abrasion, and the ground iron has certain pollution to cement.
High-aluminum balls are widely used in the hardening and deep processing of thick and hard materials in different types of ceramics, enamels, glass, chemicals and other factories. It has high strength, high hardness, high wear resistance, large specific gravity, small volume, high temperature resistance, corrosion resistance, pollution-free and other characteristics. It is widely used in different types of ceramic, enamel, glass, chemical industry thick and hard materials. Finishing and deep processing are grinding media for fine grinding equipment such as ball mills, pot mills, vibrating mills, etc. The grinding and grinding efficiency and wear resistance are much better than ordinary ball stones or natural pebbles.
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To establish constraint constraints, consider precise constraints and fuzzy constraints.
(1) Constraint of modulus (accurate constraint) 2≤m≤8 The constraint function is: g1(X)=2-x1≤0g2(X)=x1-8≤0(2)(2) Constraint of the number of active teeth (Exact Constraint) 17≤Z1≤40 The constraint function is: g3(X)=17-x2≤0g4(X)=x2-40≤0(3)(3) Limit of tooth width coefficient (fuzzy constraint) tooth width coefficient The constraint uses a trapezoidal distribution in the linear membership function as shown.
Figure 1 trapezoidal distribution is generally recommended 019 ≤ φd ≤ 114, the fuzzy boundary is determined by the expansion coefficient method to determine the upper and lower bounds of the transition interval. The amplification coefficients include the upper amplification coefficient β (generally 1105 to 1130, 111 in this example) and the lower amplification coefficient β (generally 0170 to 0195, 019 in this example). The upper bound of transition zone A is xu = 1919; the lower bound xL = β × xu = 019 × 019 = 0181; the lower bound of transition zone B is xL = 114, the upper bound is xu = β × xL = 1111 × 114 = 1154; The constraint is converted to xλ ≤ φd ≤ xλ, where xλ and xλ are calculated by: xλ = xu - λ(xu - xL) = 1.
Conclusion The most important advantage of using fuzzy optimization methods for mechanical design is to design an optimal solution under existing conditions (including equipment, process, materials, and technical level of design and manufacturing). Moreover, different design schemes can be obtained according to different horizontal cuts for selection. The Matlab optimization toolbox greatly improves the design efficiency and accuracy.
In the case of cooperation with the chain, scraper and E-screw, the drive sprocket is replaced by 103S00/040103, the chain center distance is 140mm, and the tongue assembly is 103S00/040102. After the transmission sprocket and tongue assembly are modified, the transmission is made. More reliable, the strength of the sprocket and tongue plate components is increased, and the service life of the components is prolonged, so that the performance of the scraper is further exerted.
Due to the transformation of the transmission sprocket, the sprocket length and the width of the head frame are matched to a length of 20 mm. For this purpose, a 10 mm thick small steel plate is welded at the outer fixing hole of the reducer connecting frame, and is added at the outer fixing hole of the blind shaft head frame. Weld 10mm thick steel plate to make the sprocket fit well with the reducer and blind shaft. At the same time, the small steel plate is welded on both sides to ensure the sprocket position is centered, and it does not affect the bolt fastening and replacement of the reducer, blind shaft, sprocket and The tongue assembly and smooth drive extend the life of the equipment and components.
After the transformation of the SGZ-764/400 scraper, the overall performance of the original scraper has made a qualitative leap, which fully meets the needs of the safe production of 21121 fully mechanized caving face. Since October 2005, the surface has been put into operation. Since the original coal production has reached new highs; low equipment failure rate, reliable operation, small maintenance and maintenance, reduced operating costs, and reduced labor intensity. At the same time, the use of idle equipment for the scraper transformation, not only solves the practical problems, saves equipment purchase funds, but also lays a solid foundation for the continuous use of accessories, and finds a feasible way for the reuse of idle equipment.
The new control is implemented in the cylindrical gear simulation preset