An oil-free and maintenance-free linear drive device for sun trackers

Abstract

The invention disclose an oil-free maintenance-free linear drive unit for a sun tracker. The oil-free maintenance-free linear drive unit comprises an outer tube and a lead screw arranged inside the outer tube. A driving nut in a screw-thread fit with the lead screw is arranged on the lead screw. A mounting ring is arranged at the position corresponding to the connecting end of the lead screw and a driving mechanism inside the outer tube. A left step type sliding shaft sleeve and a right step type sliding shaft sleeve are respectively arranged at the two ends of the mounting ring, wherein the shaft sleeves are made of engineering plastics; the inner walls of the left step type sliding shaft sleeve and the right step type sliding shaft sleeve are in contact with the lead screw; and the lead screw can rotate relative to the left step type sliding shaft sleeve and the right step type sliding shaft sleeve. A composite layer is formed on the hole wall of the driving nut in an injection molding mode by using engineering plastics; and threads cooperating with the lead screw correspondingly are arranged on the composite layer. According to the invention, on the basis of an analysis of a sun tracker operation mode and combination of the modern engineering plastic and composite technology, the linear driver used by the solar energy is processed based on the oil-free maintenance-free design, so that the trouble of lubrication failure is completely eliminated.

Description

technical field [0001] The invention belongs to the technical field of solar tracking, in particular to an oil-free and maintenance-free linear drive device for a solar tracker. Background technique [0002] Electric linear drives are frequently used drive components in the field of solar tracking, such as figure 1 and 2 As shown, it is a schematic diagram of the structure of the existing linear drive device. The driving mechanism drives the screw mandrel 2 to rotate, and the screw mandrel 2 drives the telescopic rod 4 rigidly connected with the drive nut 3 to do linear motion through the transmission nut 3, and the screw mandrel 2 passes through a pair of cones. The roller bearing 9 is supported and connected with the outer tube 1 . [0003] In the structural design of the existing linear drive device, good lubrication is required between the screw rod and the drive nut and in the tapered roller bearing. At the same time, it must be ensured that the top rainproof and dust...

AI Technical Summary

Problems solved by technology

[0003] In the structural design of the existing linear drive device, good lubrication is required between the screw rod and the drive nut and in the tapered roller bearing. At the same time, it must be ensured that the top rainproof and dustproof seal 10 cannot fail, otherwise the equipment will be damaged due to Ingress of water and dust causes lubrication failure and failure

Solar energy equipment generally needs to be guaranteed to run for 20 years. Generally, it is difficult to guarantee lubrication. Most of the rainproof and dustproof seals are rubber parts, which will generally fail after three years. Through practice, most of the electric linear drives used outdoors are damaged due to lubrication failure. About 5 years to break down

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