Double one-way electromagnetic valve hydraulic locking wind-resistant control system of single-shaft photovoltaic tracker

Abstract

The invention discloses a double one-way electromagnetic valve hydraulic locking wind-resistant control system of a single-shaft photovoltaic tracker, which comprises a photovoltaic tracking controller, an electric driver and a plurality of hydraulic locking wind-resistant devices. The hydraulic locking wind-resistant devices and the electric driver share a rotating shaft, and each hydraulic locking wind-resistant device is composed of a two-way hydraulic cylinder and two one-way electromagnetic valves. When the two electromagnetic valves are closed at the same time, the hydraulic cylinder acts and is locked, when one electromagnetic valve is closed, the hydraulic cylinder can only act in one direction and is locked in the other direction, and the photovoltaic tracking controller controls rotation of the electric driver and opening and closing of the two single-phase electromagnetic valves. When the electric driver rotates in one direction, the corresponding single-phase electromagnetic valve is opened, the hydraulic locking wind-resistant device is driven by the rotating shaft to move in one direction, when the electric driver stops rotating, the two electromagnetic valves are closed, the hydraulic locking wind-resistant device is forbidden to move, and therefore elastic rotation of the rotating shaft is locked. The hydraulic locking wind-resistant device is adopted for bidirectional locking, so that the wind-resistant capability of the single-axis photovoltaic tracker is improved at a lower cost.

Description

technical field [0001] The invention belongs to the technical field of sun tracking devices, and relates to a hydraulic locking and wind resistance control system of double one-way solenoid valves for a single-axis photovoltaic tracker. Background technique [0002] The photovoltaic tracker is an important part of the solar photovoltaic power generation system. By automatically adjusting the working angle, the tracker can make the photovoltaic modules it carries face the sun as much as possible, so that the photovoltaic panels can receive solar radiation energy to the maximum extent. [0003] Complete tracking of the sun's movement requires a dual-axis tracker. In order to improve the cost-effectiveness of the photovoltaic tracker, one of the azimuth or elevation angles can be fixed, and only the other one can be tracked. This kind of tracker is called a single-axis photovoltaic tracker. The usual structure of a single-axis photovoltaic tracker is to set an electric rotary d...

AI Technical Summary

Problems solved by technology

[0009] 1. The damper can only reduce the vibration amplitude, but cannot prevent the vibration from happening. The battery board on the single-axis tracker will still twist and cause the risk of hidden cracks

[0010] 2. It is not easy to choose the damping force. If the damping force is too large, it will affect the normal rotation of the tracker. If the damping force is too small, the wind resistance effect is relatively poor.

[0011] 3. The damper cannot complete the vibration of the locked spindle, so the violent movement of the damper accelerates the wear of the damper when the vibration occurs, and the overall service life is short

[0013] The advantage of multi-point drive technology is that the spindle has good rotational stiffness and strong wind resistance, but the problem is that the cost is high

Adding the drive itself increases the cost of the entire system, and adding synchronous drives between multiple drives further increases the complexity and cost of the system

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