Variable pitch mechanism of ocean current energy generator set

Abstract

The invention discloses a variable pitch mechanism of an ocean current energy generator set. The variable pitch mechanism of the ocean current energy generator set comprises a hub, wherein the hub comprises hub walls, three rotatable rotating shafts are uniformly distributed on the circumferential surfaces of the hub walls in a penetrating mode, the outer ends of the rotating shafts are connectedwith blades, first pitch bearings are arranged at the joints of the rotating shafts and the hub walls, and the inner ends of the rotating shafts are connected with a core portion bearing base throughsecond pitch bearings; the core portion bearing base is arranged in the hub walls in the axial direction of a main shaft, and the hub connecting side of the core portion bearing base is fixedly connected with the main side connecting sides of the hub walls, gears are fixed on the rotating shafts correspondingly, and the gears on two adjacent rotating shafts are meshed and connected to form a synchronous rotating structure through the intermediate gear, wherein the gear or the intermediate gear is connected with a driving mechanism. According to the variable pitch mechanism of the ocean currentenergy generator set, the load borne by a pitch bearing in the variable pitch mechanism is reduced, the performance requirement of the bearing in the whole variable pitch mechanism is reduced, and the service life of the bearing is prolonged.

Description

technical field [0001] The invention belongs to the field of new energy utilization, and in particular relates to a pitch-variable mechanism of an ocean current energy generating set. Background technique [0002] In the field of new energy utilization, ocean current energy is a kind of high energy density, pollution-free, green and renewable energy. The development and utilization of ocean current energy is of great significance to alleviate the energy crisis and reduce environmental pollution. The ocean current energy generator set converts the kinetic energy of the fluid medium (seawater) into the kinetic energy of the impeller through the impeller, and then further converts it into electrical energy. Pitch change (that is, changing the pitch angle of the blades) is a key technology in ocean current energy power generation devices. By changing the pitch, more ocean current energy can be captured, thereby increasing the power generation of the unit. At the same time, when...

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Problems solved by technology

[0003] There are mainly the following types of existing sea current energy variable pitch mechanisms: 1. Electric pitch variable mechanism: each blade is composed of an electric motor and a reduction gear box to adjust the pitch of the blades. Angle, this kind of pitch structure is more suitable for independent pitch, but it needs a larger internal space of the hub, and the load on the main shaft caused by the weight increase of the pitch mechanism is also relatively large, this structure is more complicated, The cost is also high; 2. Crank-slider mechanism: This mechanism uses hydraulic pressure as power, but because the crank-slider mechanism itself has a dead point, the pitch angle of the mechanism is less than or equal to 180°; 3. Gear teeth Bar mechanism: the variable pitch actuator of this mechanism is relatively simple, but its driving device (such as a hydraulic cylinder) is not easy to install. This mechanism is only suitable for low-power ocean current energy generator sets. When the power of the set is large, this Too much load on the pitch bearings in the mechanism unit

4. Worm gear mechanism: Due to the self-locking characteristics of the worm gear and worm, it can prevent the feathering of the blade under the action of water flow, and no additional limit is required, but the transmission efficiency of the worm gear and worm mechanism is low and the heat generation is large

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