CN116201180A - Marine fan foundation scour experiment device of rotatable base - Google Patents

Abstract

The invention discloses a basic scouring experiment device of a rotatable base offshore wind turbine, which comprises a disc bottom plate, wherein an upright bearing is fixedly connected to the upper part of the disc bottom plate; the upper end of the vertical bearing is rotationally connected with a rotating block with a rotating shaft fixed on the side surface, the lower end of the rotating block is fixedly connected with a connecting rod, the lower end of the connecting rod is fixedly connected with a first bevel gear, and a second bevel gear is connected below the first bevel gear in a meshed manner; the inner side of the second bevel gear is fixedly connected with a rotating shaft, and the outer side of the rotating shaft is fixedly connected with a positioning gear; the upper side part of the vertical bearing is provided with a limiting through hole for inserting the limiting shaft sleeve. The invention solves the problems that a laboratory water tank can only give unidirectional reciprocating water flow or waves, different incoming flow directions can not be set for a single pile foundation structure, and the dredging characteristics of the offshore wind power foundation structure in different tide action directions can not be mechanically researched.

Description

An experimental device for scouring the foundation of offshore wind turbines with a rotatable base

technical field

The invention belongs to the technical field of offshore wind turbines, and relates to an offshore wind turbine foundation scour test device with a rotatable base.

Background technique

Offshore wind power is an important development direction of clean energy. At present, my country has formed a relatively complete industrial chain of offshore wind power technology in the southeast coastal areas, which has greatly optimized the energy structure of surrounding cities. However, with the increase of the service life of the offshore wind power infrastructure, the local erosion of the foundation is gradually exposed, resulting in a reduction in the bearing capacity of the foundation and unbalanced lateral forces, which seriously affect the stability of the offshore wind power foundation. Once the offshore wind power foundation is damaged, it will bring huge economic losses. The tidal current characteristics of the southeastern coastal areas of my country are closely related to the topography. Most sea areas belong to the strong tidal current area and belong to the regular semi-diurnal tidal type, and the shallow water effect is obvious. Therefore, tidal currents have a great influence on the local scour of offshore wind power foundations, and different tidal current directions are the key factors for studying the scour-silting characteristics of offshore wind power foundations.

The current laboratory tank can only give a single direction of reciprocating water flow or wave, it is difficult to set different flow directions for the single pile foundation structure, and it is impossible to conduct a mechanism study on the erosion and deposition characteristics of the offshore wind power foundation structure under different tidal current directions . Therefore, there is an urgent need for a rotating disk test device for offshore wind power single pile foundations that can simulate different tidal action directions, and further reveal the erosion and deposition mechanism of offshore wind power foundation structures under tidal currents, thereby forming a comprehensive and objective local erosion of offshore wind power foundations. The analysis method of silt characteristics is used to ensure the safety of offshore wind power structures.

Contents of the invention

The purpose of the present invention is to provide a rotatable base offshore wind turbine foundation scour test device to overcome the shortcomings of the existing test device.

The technical solution adopted by the present invention is: the device includes a disc bottom plate, which is characterized in that: the upper part of the disc bottom plate is fixedly connected with an upright bearing; A connecting rod is connected, the lower end of the connecting rod is fixedly connected with the first bevel gear, and the second bevel gear is meshed and connected with the bottom of the first bevel gear; the inner side of the second bevel gear is fixedly connected with the rotating shaft, and the outer side of the rotating shaft is fixedly connected with the positioning gear; The upper side of the vertical bearing has a limit through hole for inserting the limit sleeve; the limit sleeve has a limit block on the outside, and a groove on the outside of the rotating shaft is opened on the inside, and the inside of the groove is provided with a positioning card block; the limit block and the positioning block are clamped on the limit card groove inside the limit through hole and the positioning gear on the outside of the rotating shaft when the limit shaft sleeve is inserted.

With the above structure, when in use, pull out the positioning sleeve to the outside, turn the rotating shaft to drive the rotating block to rotate, the rotating block drives the first bevel gear to rotate, and the first bevel gear drives the second bevel gear to rotate. After the adjustment is completed, place the positioning sleeve Push it inward, and clamp the positioning block on the outside of the positioning gear to limit the position of the rotating shaft. Due to the position-limiting effect of the positioning sleeve limit card and the positioning block, at this time, the direction of the rotating shaft can be adjusted by manually rotating the rotating shaft on the side of the rotating block, so that the upright bearing drives the rotation of the disc bottom plate to adjust the rotation of the disc bottom plate. Direction, to adjust the direction of the disc bottom plate, to simulate the rotating disc test of the offshore wind power single pile foundation with different tidal current directions, and solve the problem that the laboratory tank can only give reciprocating water flow or waves in one direction, which is difficult for the single pile foundation structure It is impossible to conduct a mechanism study on the erosion and deposition characteristics of offshore wind power infrastructure structures under different tidal current directions by setting different flow directions. At the same time, the positioning block provided inside the groove is clamped on the outside of the positioning gear during use, so as to lock the rotating shaft and fix the rotating shaft.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the structural representation of vertical bearing of the present invention;

Fig. 3 is the structural representation of ball of the present invention;

Fig. 4 is the structural representation of rotating block of the present invention;

Fig. 5 is a structural schematic diagram of the rotating shaft of the present invention.

In the figure: 1. Disc bottom plate; 11. Glass column; 12. Upright bearing; 13. Limiting through hole; 14. Limiting slot; 15. Positioning sleeve; 16. Limiting block; 17. Positioning card Block; 18, shaft hole; 19, ball; 2, rotating block; 21, positioning slot; 22, the first bevel gear; 23, the second bevel gear; 24, rotating shaft; 25, positioning gear; 26, the first Connecting block; 27, connecting rod; 3, rotating shaft; 31, positioning plate; 32, second connecting block.

Detailed ways

As shown in FIG. 1 , FIG. 2 , FIG. 3 and FIG. 4 , the present invention includes a disc bottom plate 1 . An upright bearing 12 is fixedly connected to the top of the disc bottom plate 1 . The upper end of the upright bearing 12 is rotatably connected with a rotating block 2 with a rotating shaft 3 fixed on the side. A second bevel gear 23 is connected. The inner side of the second bevel gear 23 is fixedly connected with a rotating shaft 24 , and the outer side of the rotating shaft 24 is fixedly connected with a positioning gear 25 . The upper side of the upright bearing 12 is provided with a limiting through hole 13 for inserting the limiting bushing 15 . The limiting sleeve 15 is provided with a limiting block 16 on the outside, and a groove set on the outside of the rotating shaft 24 is formed on the inside, and a positioning block 17 is arranged inside the groove. The limiting block 16 and the positioning block 17 are engaged with the limiting slot 14 inside the limiting through hole 13 and the positioning gear 25 outside the rotating shaft 24 when the limiting sleeve 15 is inserted.

As shown in Figure 5, the front portion of the rotating shaft 3 is provided with a positioning plate 31, and the rotating shaft 3 at the rear portion of the positioning plate 31 is covered with a second connecting block 32 with internal threads; The first connecting block 26 of the socket; the rotating shaft 3 at the front of the positioning plate 31 is inserted into the socket 26 of the first connecting block and positioned by the positioning plate 31, and the second connecting block 32 is screwed on the outside of the first connecting block 26 On, the rotating shaft 3 is fixedly connected to the side of the rotating block 2. With this structure, it is not only convenient to disassemble, but also convenient to carry and transport.

As shown in Figure 3 and Figure 4, the lower end of the rotating block 2 and the upper end of the upright bearing 12 are provided with a positioning slot 21, and the positioning slot 21 is provided with a ball 19 to increase the rotation between the rotating block 2 and the upright bearing 12 flexibility.

As shown in Fig. 1 and Fig. 3, a central shaft hole 18 is opened at the center of the upper end of the upright bearing 12, and a glass column 11 is set on the outer side.

Claims (4)

1. The device comprises a disc base plate (1), and is characterized in that an upright bearing (12) is fixedly connected to the upper part of the disc base plate (1); the upper end of the vertical bearing (12) is rotationally connected with a rotating block (2) with a side surface fixed with a rotating shaft (3), the lower end of the rotating block (2) is fixedly connected with a connecting rod (27), the lower end of the connecting rod (27) is fixedly connected with a first bevel gear (22), and a second bevel gear (23) is connected below the first bevel gear (22) in a meshed manner; a rotating shaft (24) is fixedly connected to the inner side of the second bevel gear (23), and a positioning gear (25) is fixedly connected to the outer side of the rotating shaft (24); the upper side part of the vertical bearing (12) is provided with a limiting through hole for inserting a limiting shaft sleeve (15); the outer side of the limiting shaft sleeve (15) is provided with a limiting clamping block (16), the inner side of the limiting shaft sleeve is provided with a groove sleeved on the outer side of the rotating shaft (24), and the inside of the groove is provided with a positioning clamping block (17); when the limiting shaft sleeve (15) is inserted, the limiting clamping block (16) and the positioning clamping block (17) are clamped on the limiting clamping groove (14) at the inner side of the limiting through hole (13) and the positioning gear (25) at the outer side of the rotating shaft (24).

2. The basic flushing experiment device of the rotatable base of the offshore wind turbine according to claim 1, wherein the front part of the rotating shaft (3) is provided with a positioning plate (31), and the rotating shaft (3) at the rear part of the positioning plate (31) is sleeved with a second connecting block (32) with internal threads; the side surface of the rotating block (2) is provided with an external thread and a first connecting block (26) with an internally opened jack; the rotating shaft (3) at the front part of the positioning plate (31) is inserted into the jack (26) of the first connecting block and positioned by the positioning plate (31), and the second connecting block (32) is screwed on the outer side of the first connecting block (26) through threads, so that the rotating shaft (3) is fixedly connected to the side face of the rotating block (2).

3. The base-rotatable offshore wind turbine foundation flushing experiment device of claim 1 or 2, wherein the lower end of the rotating block (2) and the upper end of the upright bearing (12) are provided with positioning clamping grooves (21), and balls (19) are arranged in the positioning clamping grooves (21).

4. The device for the basic flushing experiment of the rotatable base offshore wind turbine according to claim 1 or 2, wherein the central position of the upper end of the vertical bearing (12) is provided with a central shaft hole (18), and the outer side of the vertical bearing is sleeved with a glass upright post (11).

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