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Out of the current technical specifications should be

Support plate relative to interference, so do not use this method. On the other hand, because the larger span, the effect of the fixed end is not necessarily good. It should ensure that the level of the main beam itself has sufficient rigidity and try to end a fixed end. 4 Deformation of a large horizontal wheel rim deformation is not caused by normal wear and tear. Figure 6 shows a practical example of a scaled-down crane. To facilitate the see, the deformation of about 30mm enlarged view. Factory '..., a /' fBl \ \ 1 0 hi mining \ fF ≥ heavy rain IfB20 platform idea of a S in Figure 6 because the main beam in the horizontal direction,ugg stivali, the role of the deformation and produce a car at the end of the power station. Figure 6, f1 and f:! Is,air jordans, in theory, when the crane is on the run and when braking, as a result of the imaginary horizontal deformation force. However, the actual 34 * Heavy Industry 2003No. 2, on both sides of the rim flange and the track is always a contact. This, f1 and I2 force transmission to the friction with the track at the outer rim, which caused the wheel tread abrasive around the corner, this position is usually a soft spot, causing rapid wear of the wheel rim. Deformation of the same idea to different ends of crane trolley track axis relative skew (f1 f1 reduced by I2 or I2 of the poor), increasing the wear and tear. Check the site misled users believe is due to wear of the crane driver causes or due to the wheel bearing run skew is weak, or because the track and conditions. But in fact not the case. Figure 7 mill for 5 arises from a unique experience in this field model, a hot rolled steel coil warehouse plant a pair of 35t, cart speed 80m/min of coil handling cranes. Check out all of the rim may cause rapid wear of the known factors, indicating that the two cranes in operation is not unusual. Crane size, with reference to Figure 6: S = 23, W = 7.5m, B = 5m, Ri = 0.11. As a final thought, almost subjective, that may be caused by large horizontal deformation of the rapid wear. Improve the level of the beam stiffness, the effect has been amazing, in the back of 15 months, no further replacement of the wheel, while the input operation since 1994 has been replaced at least twice a month wheel. Middle span of this case because it is equal to 0.11 and the initial Ri, improved Iy values, and for good lateral support ends improvements, obtained the satisfactory results. But lifting capacity of 85t, span of 37m, the wheels of the cart speed 100m/min abnormal wear of wheel flange slab handling crane to take the same approach, has yielded some results, but the effect was not as good as on the case. This may be due to the initial Ri value of only 0.09, and the span is too large because (speed carts may have been reduced.) In theory, the main beam design, manufacturing quality,moncler outlet, and end connections without error, but pay attention to Ri value of about 0.10. This experience made us realize that Iy / Ix (Ri) the importance of the ratio,ugg italia, it should pay attention to the level of rigidity of the main beam. 6 reasoning for high-speed crane, if the horizontal force coefficient is 10%, limiting the horizontal deformation generated by a moving load is equal to vertical movement of the load of the deformation, Iy Ix value must be a minimum value of the 10% (Ri = 0.1). However, it is mentioned above, also should be noted that in the horizontal direction caused by static load deformation. So pay attention to Ix Iy value must be greater than 10% of the value (can be between 0.12 to 0.14). This level of Fang Xiangjing according to the size of the deformation load is determined. 7 Conclusions must be limited to the total horizontal deformation to achieve the required Iy values. Standards and technical specifications set forth in the limit for the span of 1 / 900. Because the horizontal deformation is the horizontal force coefficient (HF) function, HF values need to be chosen, different technical specifications will be different this value. Vertical load can be expressed as a percentage HF value. For example: AISE6: 50% of the braking wheel HF = 10%, 100% of the braking wheel HF = 20%. CMAA: Minimum 2.5%, more accurate according to the acceleration and deceleration to determine. FEM: 3% to 30% in the wheel at speed and under acceleration to determine. Indian standards: According to the load rating determined. , 5% (M1 to M3), 7% (M4, M5), 10% (M6 to M Cool

. If you can get at different speeds and different control systems and different braking conditions,moncler günstig, the HF value of more accurate, then the designers will be able to design the best cross-section. And the design software can adjust the value as one of the parameters Ri.

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