RU219898U1 - Wave power plant - Google Patents

Abstract

The utility model relates to the field of generating electricity by converting mechanical energy, such as the energy of sea waves, into electrical energy. The wave power plant comprises a body with a top cover and a bottom. In the housing there is a vertical pipe, the upper end of which is fixed on the housing cover, and the lower end of the pipe has a gap with the bottom. The rotor and stator of the linear generator are located coaxially with the pipe inside and outside it, respectively. The rotor and stator are made with positive buoyancy, and the mass of the stator is twice the mass of the rotor. Holes are made in the upper part of the pipe for communication of air media above the internal and external liquid columns. To avoid impacts on the cover, the rotor is pressed from above by an internal compression spring, and the stator is pressed by an external compression spring, and the spring stiffness is selected so that in the neutral position of the power plant, the lower edges of the rotor and stator are immersed in the liquid at the same level. The technical result of using the proposed wave power plant is to increase the speed of the rotor relative to the stator.

Description

The utility model relates to the field of generating electricity by converting mechanical energy, such as the energy of sea waves, into electrical energy.

Known wave power plant (RF patent No. 2028502) containing partially filled with liquid sealed housing and located in it a linear electric generator, consisting of a stator and a rotor. A vertical pipe is installed in the housing coaxially with it, one end of which is attached to the housing cover, and the other end is located with a gap relative to the bottom. The rotor and stator are made with positive buoyancy and are located in the formed liquid columns, and a pressure difference is created in the gas volumes above these columns.

The disadvantage of this wave power plant is the low speed of movement of the rotor relative to the stator, due to the increased resistance of the compressed air when changing the levels of the liquid columns.

The objective of the utility model is to improve the design of a wave power plant, which makes it possible to increase its productivity.

The technical result is an increase in the speed of movement of the rotor relative to the stator of the wave power plant.

The technical result is achieved by the proposed wave power plant, containing a housing with a top cover and a bottom. In the housing there is a vertical pipe, the upper end of which is fixed on the housing cover, and the lower end of the pipe has a gap with the bottom. The rotor and stator of the linear generator are located coaxially with the pipe inside and outside it, respectively. The rotor and stator are made with positive buoyancy. The inner pipe forms in the liquid in the housing two columns, internal and external, which communicate through the gap between the lower end of the pipe and the bottom. At the same time, holes are made in the upper part of the pipe for communication of air media above the inner and outer columns of liquid. The stator is made with a mass twice the mass rotor. In order to avoid impacts on the cover, the rotor is pressed from above by an internal compression spring, and the stator is pressed by an external compression spring. The upper ends of the inner and outer compression springs rest against the cover, and the stiffness of the springs is selected so that in the neutral position of the power plant, the lower edges of the rotor and stator are immersed in the liquid at the same level.

In FIG. 1 shows a wave power plant in the neutral position of the float. In FIG. 2 shows a wave power plant during the onset of a wave. In FIG. 3 shows a wave power plant when a wave runs off.

Wave power plant contains (figure 1) housing 1 with a top cover 2 and a bottom 3. In the housing is a vertical pipe 4, the upper end of which is mounted on the cover 2 of the housing, and the lower end of the pipe 4 has a gap with the bottom 3. Coaxially with the pipe 4 the rotor 5 and the stator 6 of the linear generator are located inside and outside it, respectively. Rotor 5 and stator 6 are made with positive buoyancy. The inner pipe 4 forms in the liquid in the body 1 two columns, inner 7 and outer 8, which communicate through the gap between the lower end of the pipe 4 and the bottom 3. At the same time, holes 9 are made in the upper part of the pipe 4 for communicating air media above the inner 7 and outer 8 columns of liquid. Stator 6 is made of mass twice the mass rotor 5. In order to avoid hitting the cover 2, the rotor 5 is preloaded from above by the internal compression spring 10, and the stator 6 is preloaded by the external compression spring 11. The upper ends of the internal 10 and external 11 compression springs rest against the cover 2, and the stiffness of the springs is selected so that in the neutral in the position of the power plant, the lower edges of the rotor 5 and stator 6 are immersed in the liquid at the same level.

Wave power plant works as follows.

In the absence of a wave, rotor 5 and stator 6 are stationary, and liquid columns 7 and 8 are at the same level. When wave rolling, the body 1 performs vertical oscillations with linear acceleration .

When the wave runs, body 1 rises with the wave upwards with vertical acceleration . Rotor 5 and stator 6, floating in liquid columns 7 and 8, have inertia forces

; ,

directed opposite to the acceleration a , i.e. vertically downwards.

Due to the different masses, the inertial force stator 6 turns out to be twice the inertia force rotor 5

,

as a result, when moving upwards together with the housing 1, the stator 6 lags behind the rotor 5 and plunges into the liquid column 8, forcing it into the pipe 4. Rising up inside the pipe 4, the liquid column 7 informs the rotor 5 of an additional impulse of movement, which allows the rotor 5 to overcome the force internal compression spring 10 and move up, overtaking stator 6.

When the wave runs off, the body 1 falls down together with the wave with a vertical acceleration a . Rotor 5 and stator 6, floating in liquid columns 7 and 8, again have inertia forces

; ,

directed opposite to the acceleration , i.e. vertically upwards.

Due to the different masses, the inertia force of the stator 6 is greater than the inertia force of the rotor 5

,

as a result, when moving down, together with the housing 1, the stator 6 lags behind the rotor 5, which is immersed in the liquid column 7, displacing it from the pipe 4. In this case, the internal compression spring 10 unclenches and imparts an additional impulse to the rotor 5, which allows the rotor 5 to move down, overtaking the stator 6.

The counter oscillatory motion of the rotor 5 and stator 6 excites EMF in the stator windings, which is converted into electricity.

Thus, the absence of compressed air resistance forces, as well as the different masses of the stator and rotor, provide an increase in the speed of the opposite movement of the rotor and stator, which increases the performance of the wave power plant.

Claims (1)

A wave power plant, comprising a housing with a top cover and a bottom, a vertical pipe is located in the housing, the upper end of which is fixed on the housing cover, and the lower end of the pipe has a gap with the bottom, the rotor and stator of the linear generator are located coaxially with the pipe inside and outside it, respectively, the rotor and the stator are made with positive buoyancy, the inner pipe forms two columns in the fluid located in the housing, internal and external, which communicate through the gap between the lower end of the pipe and the bottom, characterized in that holes are made in the upper part of the pipe for communication between the air media above internal and external columns of liquid, the stator is made of mass twice the mass of the rotor, in order to avoid impacts on the cover, the rotor is pressed from above by an internal compression spring, the stator is pressed by an external compression spring, the upper ends of the internal and external compression springs abut against the cover, and the stiffness of the springs is selected so that in the neutral position of the power plant the lower edges of the rotor and stator are immersed in liquid at the same level.