A tidal current energy generator set based on hydrodynamic automatic horizontal axis turbine

Abstract

The invention discloses a hydrodynamic automatic horizontal-axis turbine tidal current energy generator set, which comprises a generator sealed cabin shell, a front fairing, a horizontal transmission shaft shell, a turbine, an outer sleeve of a steering shaft, and a steering shaft; the generator shaft is axially connected to the generator sealed cabin shell; the horizontal transmission shaft shell is fixed behind the front fairing; the outer sleeve of the steering shaft is fixed below the front fairing; the outer sleeve of the steering shaft is axially connected to the steering shaft; the turbine is arranged behind the horizontal transmission shaft shell and is fixedly connected to the horizontal transmission shaft; the horizontal transmission shaft passes through the horizontal transmission shaft shell and is connected to the motor shaft through a vertical transmission mechanism in the front fairing; the lower part of the steering shaft is fixed to the lower bracket. When the water flow direction changes, the horizontal transmission shaft shell and the turbine rotate freely around the steering shaft, the generator sealed cabin shell is fixed on the upper bracket, and the generator stator rotates. The contradiction of cable winding is solved, and no rotary joint is required, and no expensive cost is required.

Description

Technical Field

[0001] The present invention belongs to the technical field of development and utilization of renewable energy, and specifically relates to a hydrodynamically-based automatic opposing horizontal axis turbine tidal energy generator set that can utilize ocean energy to convert tidal energy in ocean energy into electricity. Background Art

[0002] The so-called ocean current mainly refers to the relatively stable flow in submarine waterways and straits, and the so-called tide mainly refers to the regular flow of seawater caused by tides. Ocean currents and tides are mixed together, and tidal energy accounts for the main part. The two can be collectively referred to as tides. Tidal power generation is a technology that uses the kinetic energy of ocean currents to generate electricity. Generally, there is no need to build dams, and turbines are used to generate electricity. The energy of tidal energy is proportional to the square of the flow velocity and the flow rate. Compared with waves, the change of tidal energy is much more stable and regular. Tidal energy changes in size and direction twice a day with the rise and fall of the tide. Generally speaking, the tidal energy of waterways with a maximum flow velocity of more than 2m / s has practical development value.

[0003] The main way to utilize tidal energy is to generate electricity. Its principle is similar to that of wind power generation. Tidal power generation relies on the impact of ocean currents to rotate turbines, which then drive generators to generate electricity. However, since the density of seawater is about 835 times that of air and it must be placed underwater, tidal power generation has a series of key technical problems, including installation and maintenance, power transmission, corrosion protection, load and safety performance in the marine environment, etc. In addition, the fixing form and turbine design of tidal power generation devices and wind power generation devices are also very different. Tidal devices can be installed and fixed on the seabed or on the bottom of a floating body, and the floating body is fixed to the sea by anchor chains.

[0004] Tidal energy generation has become a current research hotspot. Tidal energy has the advantages of strong predictability and high energy density, but it also has disadvantages such as low flow velocity and unstable direction in local areas. At the same time, the harsh marine environment also brings great difficulties to the development of tidal energy generators. Improving the reliability of the unit and improving the overall efficiency have become key technical issues in the development of tidal energy generators.

[0005] There are two main forms of tidal turbine power generation, one is the horizontal axis type and the other is the vertical axis type. The vertical axis type is not very efficient, but it can accept tidal currents in all directions and there is no cable entanglement problem. The horizontal axis type is highly efficient, but the turbine blades must automatically turn with the tidal current and always align with the direction of the tidal current to keep the power generation efficiency at the best state. This will bring a new problem - the problem of transmission cable entanglement. The United States invented the rotary joint to solve this problem, but the underwater rotary joint is expensive (US$100,000) and has a limited lifespan, so it is not a long-term solution. In order to improve efficiency, free steering and cable entanglement have become a pair of contradictions. Summary of the invention

[0006] The purpose of the present invention is to pursue high efficiency and solve the contradiction between free steering and cable winding. There is no need for a rotating joint and no expensive costs. The horizontal axis tidal power generation system can allow the water wheel blades to automatically turn with the tide and always align with the direction of the tide, so that the power generation efficiency is maintained at the best state. It will not cause the problem of cable winding, and provide an automatic horizontal axis turbine tidal power generator set based on hydrodynamics.

[0007] A hydrodynamic automatic opposing horizontal shaft turbine tidal current energy generating device, comprising a generator sealed cabin housing 7, a front fairing 16, a horizontal transmission shaft housing 17, a turbine, an outer sleeve 23 of a steering shaft, and a steering shaft 24;

[0008] The generator 6 is fixed in the generator sealed cabin housing 7, and the generator shaft 8 is axially connected to the generator sealed cabin housing 7;

[0009] The horizontal transmission shaft housing 17 is fixed behind the front fairing 16;

[0010] The outer sleeve 23 of the steering shaft is fixed below the front fairing 16 and is at a right angle to the horizontal transmission shaft housing 17. The outer sleeve 23 of the steering shaft is axially connected to the steering shaft 24.

[0011] The turbine is arranged at the rear of the horizontal transmission shaft housing 17 and is fixedly connected to the horizontal transmission shaft 18; the horizontal transmission shaft 18 passes through the horizontal transmission shaft housing 17 and is connected to the generator shaft 8 through a vertical transmission mechanism in the front fairing 16;

[0012] An upper bracket fixing portion is provided on the top of the generator sealed cabin shell 7;

[0013] A lower bracket fixing portion is provided at the lower portion of the steering shaft 24 .

[0014] The generator shaft 8 and the horizontal transmission shaft 18 are respectively provided with corresponding bevel gears to realize vertical transmission power.

[0015] A sealed compartment end cover 4 is provided on the top of the generator sealed compartment shell 7, and the sealed compartment end cover 4 is provided with a wire outlet hole 2 and a cable watertight joint 3.

[0016] The vertical transmission shaft 12 is axially connected to the vertical transmission shaft sleeve upper support structure 11 and the vertical transmission shaft sleeve lower support structure 15 through the vertical transmission shaft upper bearing 10 and the vertical transmission shaft lower bearing 14 respectively.

[0017] An oblique support 25 is provided between the generator sealed cabin housing 7 and the horizontal transmission shaft housing 17 .

[0018] Another object of the present invention is to provide a tidal current energy generator set.

[0019] A hydrodynamically automatic opposed horizontal-axis turbine tidal current energy generator set comprises: a generator set main frame, an upper support, a lower support and the hydrodynamically automatic opposed horizontal-axis turbine tidal current energy power generation device. The generator set main frame is fixed on the seabed, the upper support and the lower support sub-frame are fixed on the generator set main frame, the upper support fixing part of the hydrodynamically automatic opposed horizontal-axis turbine tidal current energy power generation device is fixed on the upper support, and the lower support fixing part is fixed on the lower support.

[0020] The present invention provides a hydrodynamic automatic horizontal axis turbine tidal current energy generating device, which can automatically face the tidal current and eliminate the need for a rotary joint, thereby solving the problem of entanglement of power transmission cables. The main structure is composed of a generator cabin in a vertical direction, a turbine transmission shaft cabin in a horizontal direction, a turbine in a horizontal direction, a right-angle transmission component with a bevel gear connecting the generator cabin and the turbine transmission shaft cabin, and a bottom adjustment inner and outer sleeve. The impeller turbine for obtaining energy is in the form of a horizontal axis turbine. The advantage of a horizontal axis turbine is that the conversion efficiency is high, and the disadvantage of a horizontal axis turbine is that the direction needs to be adjusted. The generator shaft is in a vertical form, and the advantage of the vertical form is that the cable entanglement can be avoided. The power of the horizontal axis turbine is transmitted to the vertical axis generator through mutually perpendicular bevel gear structures, so that both the advantages of the high efficiency of the horizontal axis turbine and the advantages of the vertical form that the cable entanglement can be avoided. The power generating device can be aligned with the direction of the tidal current to maintain high efficiency without causing the cable entanglement problem.

[0021] This horizontal axis tidal current energy generating device has simple structure, high mechanical strength, reliable performance, seawater corrosion resistance, light weight, and easy installation. When using it, you only need to install the upper and lower mounting flanges of the device to the position where it needs to be fixed. The output cable of this device is equipped with a watertight joint, which can withstand pressure at a water depth of 6,000 meters.

[0022] The present invention is mainly composed of an energy acquisition part, an energy conversion part and a direction adjustment part: the energy acquisition part is mainly composed of a number of high-efficiency turbine blades installed on the turbine hub, the turbine hub is connected to the horizontal transmission shaft, the horizontal transmission shaft transmits the torque to the vertical transmission shaft through the torque right-angle transmission device, and the vertical transmission shaft transmits the torque to the generator. The direction adjustment system cleverly combines the shaft sleeve in the cabin with the vertical transmission shaft to achieve both direction adjustment and transmission.

[0023] The main advantages of this invention are: it can be used for tidal energy generation that changes size and direction twice a day, it can automatically adjust direction to prevent cable entanglement, it is low cost, it does not require the cost of a rotary joint (US$100,000), and it can be used by simply fixing both ends. It has a wide range of applications, can be manufactured in different specifications according to different power requirements, has a long lifespan, is not afraid of seawater corrosion, is easy to use, and is easy to maintain. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1It is a schematic diagram of the structure of a hydrodynamic automatic opposing horizontal axis turbine tidal current energy power generation device;

[0025] Figure 2 This is a schematic diagram of the structural installation of a hydrodynamic automatic opposing horizontal axis turbine tidal current energy power generation device.

[0026] Among them: 1. Top mounting flange, 2. Wire outlet hole, 3. Cable watertight joint, 4. Sealed compartment end cover, 5. Generator support structure, 6. Generator, 7. Generator sealed compartment shell, 8. Generator shaft, 9. Coupling, 10. Upper bearing of vertical transmission shaft, 11. Upper support structure of steering sleeve, 12. Vertical transmission shaft, 13. Steering sleeve in cabin, 14. Lower bearing of vertical transmission shaft, 15. Lower support structure of steering sleeve, 16. Front fairing, 17. Horizontal transmission shaft housing, 18. Horizontal transmission shaft, 19. Front bearing of horizontal transmission shaft, 20. Bevel gear, 21. Steering shaft support, 22. Steering bearing pressure bearing, 23. Outer sleeve of steering shaft, 24. Steering shaft, 25. Oblique support, 26. Oblique support connecting ear, 27. Bottom mounting flange, 28. Turbine blade, 29. Oblique support fixing buckle, 30. Support structure of horizontal transmission shaft bearing, 31. Rear bearing of horizontal transmission shaft, 32. Turbine hub, 33. Rear fairing. DETAILED DESCRIPTION

[0027] Example 1

[0028] See also Figure 1 , 2 The hydrodynamic automatic horizontal axis turbine tidal current energy generating device comprises: a generator sealed cabin housing 7, a front fairing 16, a horizontal transmission shaft housing 17, a turbine, an outer sleeve 23 of a steering shaft, and a steering shaft 24;

[0029] The generator 6 is fixed in the generator sealed cabin shell 7 through the generator support structure 5. The top of the generator sealed cabin shell 7 is provided with a sealed cabin end cover 4. The sealed cabin end cover 4 is provided with a cable watertight joint 3 and a wire outlet hole 2.

[0030] The generator shaft 8 is connected to the vertical transmission shaft 12 through a coupling 9;

[0031] The vertical transmission shaft 12 is installed in the vertical transmission shaft sleeve 13, and the vertical transmission shaft sleeve 13 is fixed in the generator sealed cabin shell 7 through the vertical transmission shaft sleeve upper support structure 11 and the vertical transmission shaft sleeve lower support structure 15;

[0032] The vertical transmission shaft 12 is axially connected to the vertical transmission shaft sleeve upper support structure 11 and the vertical transmission shaft sleeve lower support structure 15 through the vertical transmission shaft upper bearing 10 and the vertical transmission shaft lower bearing 14 respectively;

[0033] The sealed compartment end cover 4 is provided with a top mounting flange 1, and the generator sealed compartment housing 7 is fixed on the upper bracket through the top mounting flange 1;

[0034] The front fairing 16 is fixed in front of the horizontal transmission shaft housing 17;

[0035] The upper end of the outer sleeve 23 of the steering shaft is provided with a steering shaft support 21, and the upper end of the steering shaft support 21 is fixedly integrated with the bottom of the front fairing 16;

[0036] The steering shaft outer sleeve 23 is provided with a steering shaft 24, and the top end of the steering shaft 24 is axially connected to the lower end of the steering shaft support 21 through the steering bearing pressure bearing 22.

[0037] The lower end of the steering shaft 24 is disposed on a bottom mounting flange 27 and fixed on a lower bracket;

[0038] The power generation device is also provided with an oblique support 25, an oblique support connecting ear 26, and an oblique support fixing buckle 29;

[0039] One end of the oblique support 25 is fixed to the outer sleeve 23 of the steering shaft through the oblique support connecting ear 26, and the other end is fixed to the oblique support fixing buckle 29, which is installed at the rear of the horizontal transmission shaft housing 17;

[0040] The horizontal transmission shaft housing 17 is provided with a horizontal transmission shaft 18, a horizontal transmission shaft front bearing 19, a horizontal transmission shaft rear bearing 31, and a horizontal transmission shaft bearing support structure 30;

[0041] The horizontal transmission shaft 18 is axially connected to the horizontal transmission shaft housing 17 through the horizontal transmission shaft front bearing 19, the horizontal transmission shaft rear bearing 31, and the horizontal transmission shaft bearing support structure 30;

[0042] The front end of the horizontal transmission shaft 18 is provided with a bevel gear 20, and the vertical transmission shaft 12 is also provided with a corresponding bevel gear meshing therewith, so as to realize a 90-degree steering transmission in the front fairing 16;

[0043] The turbine is fixed at the rear end of the horizontal transmission shaft 18, and the turbine includes: a turbine hub 32 and turbine blades 28; the turbine hub 32 is fixed to the rear end of the horizontal transmission shaft 18, and a rear fairing 33 is provided behind the turbine;

[0044] When the flow comes from any direction, the turbine is affected by the water flow, forming a torque, and the horizontal transmission shaft housing 19, the front fairing 16 and the outer sleeve 23 of the steering shaft are integrated. The steering shaft 24 is fixed to the lower bracket through the bottom mounting flange 27 and does not move.

[0045] The outer sleeve 23 of the steering shaft 24, which is sleeved on the steering shaft 24, rotates around the steering shaft 24 under the action of the steering bearing pressure bearing 22, that is, it rotates around the line connecting the top mounting flange (1) and the bottom mounting flange (27), and finally makes the turbine align with the water flow direction, realizing automatic steering.

[0046] The generator sealed cabin housing 7 is fixed on the upper bracket through the top mounting flange 1, and the generator 6 is fixed in the generator sealed cabin housing 7. The generator 6 does not rotate. The generator shaft 8, the vertical transmission shaft 12 and the horizontal transmission shaft 8 are connected by the bevel gear 20 and can rotate freely. The generator 6 does not rotate and the cable does not get tangled. The contradiction between free steering and cable tangling is solved, the rotary joint is omitted, and expensive costs are not spent.

Claims

1. A hydrodynamically automatically directed horizontal axis turbine tidal current energy generator set, comprising: The main frame of the generator set, the upper bracket, the lower bracket and the hydrodynamic automatic subtending horizontal axis turbine tidal current energy power generation device, the main frame of the generator set is fixed on the seabed, the upper bracket and the lower bracket sub-frame are fixed on the main frame of the generator set, the upper bracket fixing part of the hydrodynamic automatic subtending horizontal axis turbine tidal current energy power generation device is fixed on the upper bracket, and the lower bracket fixing part is fixed on the lower bracket; The hydrodynamic automatic opposing horizontal axis turbine tidal current energy power generation device comprises a generator sealed cabin housing (7), a front fairing (16), a horizontal transmission shaft housing (17), a turbine, an outer sleeve of a steering shaft (23), and a steering shaft (24); The generator (6) is fixed in the generator sealed cabin housing (7), and the generator shaft (8) is axially connected to the generator sealed cabin housing (7); The horizontal transmission shaft housing (17) is fixed behind the front fairing (16); The outer sleeve (23) of the steering shaft is fixed below the front fairing (16); it is at right angles to the horizontal transmission shaft housing (17); the outer sleeve (23) of the steering shaft is axially connected to the steering shaft (24); The turbine is arranged at the rear of the horizontal transmission shaft housing (17) and is fixedly connected to the horizontal transmission shaft (18); the horizontal transmission shaft (18) passes through the horizontal transmission shaft housing (17) and is connected to the generator shaft (8) through a vertical transmission mechanism in the front fairing (16); An upper bracket fixing portion is provided at the top of the generator sealed cabin shell (7); and a lower bracket fixing portion is provided at the bottom of the steering shaft (24).

2. The hydrodynamically automatically opposed horizontal axis turbine tidal current energy generator set according to claim 1 is characterized in that: The generator shaft (8) and the horizontal transmission shaft (18) are respectively provided with corresponding bevel gears to realize vertical transmission power.

3. The hydrodynamically automatically opposed horizontal axis turbine tidal current energy generator set according to claim 2 is characterized in that: The top of the generator sealed compartment housing (7) is provided with a sealed compartment end cover (4), and the sealed compartment end cover (4) is provided with a wire outlet hole (2) and a cable watertight joint (3).

4. The hydrodynamically automatically opposed horizontal axis turbine tidal current energy generator set according to claim 3 is characterized by: The generator shaft (8) is connected to the vertical transmission shaft (12) via a coupling (9); the vertical transmission shaft (12) is installed in a vertical transmission shaft sleeve (13); the vertical transmission shaft sleeve (13) is fixed in the generator sealed cabin housing (7) via a vertical transmission shaft sleeve upper support structure (11) and a vertical transmission shaft sleeve lower support structure (15); The vertical transmission shaft (12) is axially connected to the vertical transmission shaft sleeve upper support structure (11) and the vertical transmission shaft sleeve lower support structure (15) respectively through the vertical transmission shaft upper bearing (10) and the vertical transmission shaft lower bearing (14).

5. The hydrodynamically automatically opposed horizontal axis turbine tidal current energy generator set according to claim 4 is characterized in that: An oblique support (25) is provided between the generator sealed cabin casing (7) and the horizontal transmission shaft casing (17).

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