CN202266366U - Horizontal shaft variable blade pitch tidal current energy water turbine - Google Patents

Abstract

The purpose of the utility model is to provide a horizontal axis variable pitch tidal current energy turbine, including a front hatch, a rear hatch, a generator system, a pitch system and a swing head assembly; the generator system includes a generator rotor, a coil, a box , the coil is fixed on the box, and the generator rotor is located in the coil; the pitch control system includes blades, worm gear, worm, pitch motor, turntable, the pitch motor drives the worm, the worm is installed on the turntable and meshes with the worm wheel, and the worm wheel Fixed connection with the blade; the swing head assembly includes a shuttle-shaped vertical rod, a rotary joint and a frame, the shuttle-shaped vertical rod is connected to the rotary joint, the rotary joint is connected to the frame, and the shuttle-shaped vertical rod rotates on the frame through the rotary joint; The distance system is connected to the generator rotor through the flange, the front hatch is connected to the turntable, the rear hatch is connected to the generator system, and the shuttle-shaped pole is connected to the box. The utility model has the advantages of simple system, high reliability, low cost, convenient maintenance and self-starting performance at low flow rate.

Description

Horizontal axis variable pitch tidal current energy turbine

technical field

The utility model relates to a hydroelectric power generation equipment.

Background technique

As the overexploitation of fossil resources is on the verge of depletion and the resulting environmental problems are becoming more and more serious, clean and renewable energy has attracted worldwide attention. The ocean area accounts for 71% of the earth and contains huge energy. Ocean current power generation has a long history, and there are various forms of development and utilization, most of which are impeller machines, which can be divided into vertical axis type (the direction of impeller rotation is perpendicular to the water surface) and horizontal axis type (horizontal axis type can also be divided into impeller rotation spindle Parallel and perpendicular to the direction of water flow). The vertical shaft type uses the torque difference of the vertical blades on both sides of the impeller to rotate the impeller, and the power generation efficiency can be effectively improved through the pitch-changing mechanism; the domestic tidal power station was built and tested in Zhoushan, Zhejiang in 2005 adopted this structure. The other is the horizontal axis structure. For example, the "underwater windmill" is a typical horizontal axis ocean current power generation device. Its blade structure is similar to that of a wind turbine, and the entire sweeping surface of the impeller faces the water. For example, in 2003, the British MCT company developed and tested The fixed-pitch horizontal-axis "underwater windmill".

At present, the common horizontal-axis tidal energy turbines are mostly fixed-pitch turbines. Due to the periodicity and bidirectionality of the tidal current, the tidal flow velocity changes periodically within a certain range. The efficient conversion and utilization of tidal current energy cannot be realized, resulting in the instability of the generated current, the impact of grid connection, the increase of cost and the waste of tidal current energy. In addition, the common tidal energy turbines with horizontal axis fixed pitch need to install additional devices such as brakes to ensure the normal operation of the turbines. The cost is high, and the loss is quite large under severe working conditions or sudden dangers, especially the damage of the blades.

Under this background, the horizontal axis variable pitch tidal current energy turbine is developed, and its unique low flow rate self-starting performance, variable pitch performance under different flow rates, and the ability to deal with dangerous conditions are particularly prominent.

Contents of the invention

The purpose of the utility model is to provide a horizontal axis variable pitch tidal current energy turbine utilizing the structure of the horizontal axis turbine and whose rotation direction points to the incoming flow direction of the water flow.

The purpose of this utility model is achieved in that:

The utility model horizontal axis variable pitch tidal current energy turbine is characterized in that it includes a front hatch cover, a rear hatch cover, a generator system, a pitch variable system and a swing head assembly; the generator system includes a generator rotor, a coil, and a box body , the coil is fixed on the box, and the generator rotor is located in the coil; the pitch control system includes blades, worm gear, worm, pitch motor, turntable, the pitch motor drives the worm, the worm is installed on the turntable and meshes with the worm wheel, and the worm wheel Fixed connection with the blade; the swing head assembly includes a shuttle-shaped vertical rod, a rotary joint and a frame, the shuttle-shaped vertical rod is connected to the rotary joint, the rotary joint is connected to the frame, and the shuttle-shaped vertical rod rotates on the frame through the rotary joint; The distance system is connected to the generator rotor through the flange, the front hatch is connected to the turntable, the rear hatch is connected to the generator system, and the shuttle-shaped pole is connected to the box.

The utility model can also include:

1. It also includes the first dynamic seal and the blade cup, and the first dynamic seal and the blade cup are installed between the blade and the turntable in sequence.

2. It also includes the second dynamic seal, and the second dynamic seal is installed between the generator rotor and the box.

3. The number of the paddle is at least one.

The utility model has the advantages of:

1. The device does not need a brake and a speed increaser, the system is simple, has high reliability, low cost, and is easy to maintain;

2. Low speed suitable for the trend, with low flow speed self-starting performance, no need to increase the starter motor, and reduce the complexity of the system;

3. Aiming at the bidirectionality of the tidal current, self-adaptive alignment to the incoming flow improves the utilization space of the tidal current energy. If the swing head assembly is not used, the reverse incoming flow can be dealt with by changing the pitch;

4. The pitch-changing technology under different flow rates makes the tidal current energy conversion efficient, ensures stable power output, and smoothly connects to the grid without impact;

5. Utilize the pitch-changing mechanism for feathering and braking, which prolongs the service life of the blades and reduces the bearing load of the blades under severe working conditions;

6. The worm gear mechanism is adopted to change the pitch, which has reverse self-locking performance, simplifies the structure and control complexity, and has a strong bearing capacity.

Description of drawings

Fig. 1 is a partial schematic diagram of the utility model pitch control system;

Fig. 2 is a schematic diagram of the utility model generator system and pitch control system;

Figure 3 is a partially enlarged view of Figure 1;

Figure 4 is a partially enlarged view of Figure 2;

Fig. 5 is the front view of the utility model;

Fig. 6 is a side view of the utility model.

Detailed ways

The utility model is described in more detail below in conjunction with accompanying drawing example:

Combining Figures 1 to 6, the utility model is a horizontal axis variable pitch tidal current energy turbine, the pitch system of which is connected to the rotor 13 of the generator system through the flange 9, and the generator system is installed on the shuttle of the swing head assembly through the box 11. Under the impact of the water flow, the swing head assembly makes the water turbine 17 automatically align with the direction of the water flow, and the variable pitch system adjusts the speed and torque of the impeller, drives the generator system to work through the flange 9, and outputs electric energy.

As shown in Figure 1, Figure 2, Figure 3, and Figure 4, the dynamic seal A2 and the blade sleeve cup 3 are installed between the blade 1 and the turntable 7 in sequence, the worm wheel 4 is fixedly connected to the blade 1, and the pitch motor 8 is connected to the worm 5, and the worm 5 is installed in the worm sleeve cup 8-1, the worm sleeve cup 8-1 is installed on the turntable 7, the front hatch cover 6 is connected to the turntable 7; the pitch motor 8 drives the worm 5, the worm 5 meshes with the worm wheel 4, and the worm wheel 4 and the blades 1 solid connection, to achieve blade 1 pitch adjustment, the number of blades can be two blades, three blades or even multiple blades.

As shown in Figures 1 and 2, the generator coil 12 is fixedly connected to the box body 11, the dynamic seal B10 is installed between the generator rotor 13 and the box body 11, and the slip ring 14 is installed at the end of the box body 11; , the dynamic seal B10 and the rear hatch 15 form the airtight working space of the generator rotor 13, the coil 12 and the slip ring 14, and the generator works to output electric energy.

As shown in Fig. 5 and Fig. 6, the shuttle-shaped vertical rod 17 is fixedly connected with the box body 11 of the generator system, the shuttle-shaped vertical rod 17 is connected with the rotary joint 18, and the rotary joint 18 is connected with the frame 19; the shuttle-shaped vertical rod 17 is rotated Joint 18 rotates on frame 19 .

The utility model is a horizontal axis variable pitch tidal current energy turbine, which is composed of a generator system, a variable pitch system and a swing head assembly, the variable pitch system is connected to the rotor 13 of the generator system through a flange 9, and the generator system The box body 11 is installed on the shuttle-shaped vertical rod 17 of the swing head assembly; under the impact of the water flow, the swing head assembly makes the water turbine 17 automatically align with the direction of the water flow, and the variable pitch system adjusts the speed and torque of the impeller. Lan 9 drives the generator system to work and output electric energy.

The variable pitch system consists of blade 1, dynamic seal A2, blade cup 3, worm gear 4, worm 5, turntable 7, front hatch 6, flange 9, pitch motor 8 and worm cup 8-1, the blade Between 1 and the turntable 7, the dynamic seal A2 and the blade cup 3 are installed in sequence, the worm wheel 4 is fixedly connected with the blade 1, the pitch motor 8 is connected to the worm 5, the worm 5 is installed in the worm cup 8-1, and the worm cup 8- 1 is installed on the turntable 7, the front hatch 6 is connected to the turntable 7; the pitch motor 8 drives the worm 5, the worm 5 meshes with the worm wheel 4, and the worm wheel 4 is fixedly connected with the blade 1 to realize the adjustment of the pitch of the blade 1, and the number of the blades can be It is two leaves, three leaves or even multiple leaves.

The generator system consists of a box body 11, a dynamic seal B10, a slip ring 14, a rear hatch cover 15, a generator rotor 13 and a coil 12. The generator coil 12 is fixedly connected to the box body 11, and the generator rotor 13 and the box body 11 The dynamic seal B10 is installed between them, and the slip ring 14 is installed at the end of the box body 11; the closed working space of the generator rotor 13, coil 12 and slip ring 14 is formed by the box body 11, the dynamic seal B10 and the rear hatch cover 15, and the generator works output power.

The swing head assembly is composed of a shuttle-shaped vertical rod 17, a rotary joint 18 and a frame 19. The shuttle-shaped vertical rod 17 is fixedly connected with the box body 11 of the generator system, and the shuttle-shaped vertical rod 17 is connected with a rotary joint 18, which is connected to the machine. Frame 19; Shuttle-shaped vertical rod 17 rotates on frame 19 through swivel joint 18.

Claims (5)

1. Horizontal axis variable pitch tidal current energy turbine, characterized by: including front hatch, rear hatch, generator system, pitch system and swing head assembly; generator system includes generator rotor, coil, box, The coil is fixed on the box, and the rotor of the generator is located in the coil; the pitch control system includes blades, worm gear, worm, pitch motor, turntable, the pitch motor drives the worm, the worm is installed on the turntable and meshes with the worm wheel, and the worm wheel and The blades are fixedly connected; the swing head assembly includes a shuttle-shaped vertical rod, a rotary joint and a frame. The shuttle-shaped vertical rod is connected to the rotary joint, and the rotary joint is connected to the frame. The system is connected to the generator rotor through the flange, the front hatch is connected to the turntable, the rear hatch is connected to the generator system, and the shuttle-shaped pole is connected to the box. 2. The horizontal axis variable pitch tidal current energy turbine according to claim 1, characterized in that it further comprises a first dynamic seal and a blade cup, and the first dynamic seal and the blade cup are sequentially installed between the blade and the turntable. 3. The horizontal-axis variable-pitch tidal current energy turbine according to claim 1 or 2, characterized in that: it also includes a second dynamic seal, and the second dynamic seal is installed between the generator rotor and the casing. 4. The horizontal-axis variable-pitch tidal energy turbine according to claim 1 or 2, wherein the number of said blades is at least one. 5. The horizontal axis variable pitch tidal current energy turbine according to claim 3, characterized in that: the number of said blades is at least one.

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