Design Of Solar Street Light Poles
Design of solar street light poles
In the solar street light system, a very important problem in the structure of the wind resistant design. The wind resistant design consists of two large, one wind resistant design, followed by a battery pack, a wind resistant design. The following are used for analysis according to the above two.
(1) solar street light wind resistant design in support of solar modules
Based on the technical parameters of the battery pack manufacturer, the solar cell module can withstand a wind pressure of 2700 Pa. If the wind resistance coefficient is 27 m / s (ten typhoons, etc.), according to the viscous fluid mechanics, the air pressure of the battery pack For 365 Pa, so the component itself is fully able to withstand 27 m / s, no damage, wind speed. Therefore, the key is to be considered in the design of the battery pack connected to the solar street light pole.
In this group of battery components, solar street light pole connection design using a bolt rod fixed connection of the street lamp system bracket design.
2 Windproof design of solar street light poles
The parameters of the solar street light are as follows: a = 16 O Slab angle of the pole height of 5 m Design selection of the solar energy at the bottom of the emitter of the width of the weld = = 4 mm at the bottom of the solar street light pole diameter 168 mm.
The surface of the weld is on the ground of the poles. Solar street light pole failure surface resistance moment W calculation point P light pole PQ = F [5000 + load line from the board (168 +6) / tan16o] × sin16o = 1545 mm = 1.545 m. Therefore, the wind load on the solar street light pole to break the bending moment M = f x 1.545 role.
According to the maximum wind speed of 27 m / s, the basic load of the 2 x 30 W dual lamp solar panel 730 takes into account the safety factor of 1.3, F = 1.3 x 730 = 730. Therefore, M = F * 1.545 = 949 × 1.545 = 1466 N. M. According to the mathematical derivation, the circular failure surface resistance moment W = π × (3 Delta R2 + 3 River Delta 2 + 3). In the above formula, R is the diameter of the circle, the width of the delta ring. (3 × 842 × 84 × 4 + 3 + 42,43) = 88768 mm = 88.768 × 10-6 M3 Wind load Stress = = 1466 m / W Damage caused by the torque / (88.768 × 10-6) = 16.5 × 106 Pa = 16.5 MPa << 215 and 215 MPa is the bending strength of Q235 steel. So choose your weld width to meet the design requirements, as long as the quality of welding to ensure that there is no problem with the solar street light poles.