System for effecting the rotational movement of a solar tracker and solar tracking device comprising such a system
A system for effecting the rotational movement of a solar tracker about an axis of rotation includes a bow mounted on the solar tracker and comprising a rack and a worm engaging with the rack to effect the rotational movement, the rack having a plastic tooth set and the bow having a damper configured to dampen the connection with the solar tracker.
1. An apparatus to move a solar tracker in rotation about an axis of rotation comprising:
an arch mounted on the solar tracker and comprising a rack; and,
a worm screw cooperating with the rack in order to produce rotational movement, wherein rack comprises teeth made of plastic material and the arch comprises a damper linked with the solar tracker.
2. The apparatus according to claim 1 , wherein the arch comprises a curved profile member on which is positioned a series of parts made of plastic material forming the rack.
3. The apparatus according to claim 2 , wherein the curved profile member comprises a gutter configured to receive the series of parts made of plastic material.
4. The apparatus according to claim 3 , wherein the series of parts made of plastic material is mounted to slide in the gutter and the arch further comprises an abutment configured to keep the series of parts made of plastic material in position in the gutter.
5. The apparatus according to claim 3 , wherein the parts made of plastic material comprise tabs having a beveled form at a free end arranged in such a way as to cooperate by bearing with a wall of the gutter.
6. The apparatus according to claim 3 , wherein the series of parts made of plastic material is mounted in position by clipping into the gutter.
7. The apparatus according to claim 1 , wherein the rack is formed on a flank of the arch contained in a plane at right angles to the axis of rotation.
8. The apparatus according to claim 1 , wherein the damper includes damping blocks interposed between the arch and the solar tracker.
9. The apparatus according to claim 1 , wherein the plastic material of the teeth includes fibers to reinforce the teeth.
10. A solar tracking device comprising solar radiation processor mounted on a solar tracker, the solar tracker being mounted to move in rotation on a frame, wherein the device further comprises the apparatus for moving the solar tracker in rotation according to claim 1 .