Tidal current energy generating device

Abstract

A tidal current energy generating device includes an outer frame ( 1 ), at least two inner frames ( 2 ), at least two mounting shafts ( 4 ), a driving unit ( 6 ), at least four horizontal-axis hydraulic generators ( 3 ), and at least six bearings ( 5 ). The at least two inner frames ( 2 ) are separably disposed in the outer frame ( 1 ), respectively. The at least two mounting shafts ( 4 ) are rotatablely disposed in the two inner frames ( 2 ), respectively, and the axial direction of the at least two mounting shafts ( 4 ) is perpendicular to the horizontal plane. The driving unit ( 6 ) is connected with the at least two mounting shafts ( 4 ) to drive the mounting shafts ( 4 ) to rotate. Every two horizontal-axis hydraulic generators ( 3 ) are fixed at one mounting shaft ( 4 ) and are disposed in the same inner frame ( 2 ). The at least four horizontal-axis hydraulic generators ( 3 ) change directions with the rotating of the mounting shaft ( 4 ). Every three bearings ( 3 ) are sleeved on one mounting shaft ( 4 ), and the three bearings ( 5 ) on one mounting shaft ( 4 ) are disposed on the two sides and the center of the two horizontal-axis hydraulic generators ( 3 ), respectively. The tidal current energy generating device can be maintained or replaced conveniently and can extend deeply in the sea.

What is claimed is: 
     
         1 . A tidal current energy generating device, comprising:
 an outer frame;   at least two inner frames, separably disposed in the outer frame;   at least two mounting shafts, rotatablely disposed in the two inner frames, respectively, an axial direction of the at least two mounting shafts being perpendicular to a horizontal plane;   a driving unit, connected with the at least two mounting shafts to drive the mounting shafts to rotate;   at least four horizontal-axis hydraulic generators, every two horizontal-axis hydraulic generators fixed at one mounting shaft and disposed in the same inner frame, and the at least four horizontal-axis hydraulic generators changing directions with the rotating of the driving unit; and   at least six bearings, every three bearings sleeved on one mounting shaft, and the three bearings on one mounting shaft disposed on the two sides of the two horizontal-axis hydraulic generators and between the two horizontal-axis hydraulic generators, respectively.   
     
     
         2 . The tidal current energy generating device according to  claim 1 , further comprising at least four water flow deflectors, wherein every water flow deflector is disposed corresponding to every horizontal-axis hydraulic generator, the at least four water flow deflectors are fixed at the outer frame or the inner frames, every water flow deflector has two water guiding sections and one middle section, the middle section is located between the two water guiding sections, a cross section of one side of every water guiding section far away from the middle section is rectangular, a cross section of one side of every water guiding section connected with the middle section is circular, a cross section of the middle section is circular, the cross sections are perpendicular to the horizontal plane and are perpendicular to a water flow direction, and the area of the circular cross section is smaller than that of the rectangular cross section. 
     
     
         3 . The tidal current energy generating device according to  claim 1 , further comprising an underwater shaft rotating protecting device, wherein the underwater shaft rotating protecting device comprises:
 a lubricant storage tank, wherein a lubricant is stored and the lubricant storage tank is disposed above water surface;   at least six seal rings, every two seal rings corresponding to one bearing and sleeved on the mounting shaft, and a lubricant cavity being formed between every two seal rings and the corresponding bearing and the mounting shaft; and   a tube, one end of the tube is communicated with the lubricant storage tank, and the other end communicated with the lubricant cavity.   
     
     
         4 . The tidal current energy generating device according to  claim 3 , wherein the underwater shaft rotating protecting device further comprises a detection module, disposed at the lubricant storage tank to detect whether the lubricant is reduced or not. 
     
     
         5 . The tidal current energy generating device according to  claim 3 , wherein the bearing is a sliding bearing, and every lubricant cavity is formed by two seal rings, the bearing, and the mounting shaft. 
     
     
         6 . The tidal current energy generating device according to  claim 3 , wherein the bearing is a rolling bearing, the underwater shaft rotating protecting device further comprises at least three bearing houses, and each lubricant cavity is formed by two seal rings, the bearing, the bearing house, and the mounting shaft. 
     
     
         7 . The tidal current energy generating device according to  claim 1 , wherein the outer frame has a plurality of fixed piles, and the outer frame is fixed at the sea bottom through piling. 
     
     
         8 . The tidal current energy generating device according to  claim 1 , wherein the outer frame has a plurality of reducing water flow resistance structures.