Wave energy hydraulic transmission system for generating system

Abstract

The invention discloses a wave energy hydraulic transmission system for a generating system. The wave energy hydraulic transmission system comprises a mechanical energy transmission mechanism which is connected with energy acquisition equipment, and a power generating mechanism which converts mechanical energy into electric energy. A dual-media hydraulic cylinder is arranged in the system and connected with a seawater hydraulic cylinder serving as the mechanical energy transmission mechanism. The seawater hydraulic cylinder is used as a hydraulic cylinder which does work, the dual-media hydraulic cylinder which adopts two different media, namely oil and seawater is arranged between the seawater hydraulic cylinder and an energy accumulator, and all oil circuits of hydraulic oil are arranged on a power generating platform on the sea, so that the pollution on a marine environment due to leakage of the oil is avoided, the cost is reduced and the reliability is improved by adopting conventional low-pressure elements.

Description

technical field [0001] The invention relates to a wave energy hydraulic transmission system, in particular to a wave energy hydraulic transmission system used in a power generation system. Background technique [0002] In order to stabilize the energy fluctuation of wave energy, hydraulic transmission technology has been gradually applied in wave energy power generation systems. The wave energy power generation system based on hydraulic transmission mostly realizes the conversion of wave energy and mechanical energy in the form of hydraulic cylinder work. The oil return and oil inlet of the hydraulic cylinder are adjusted by the energy device. Since the rated pressure of the hydraulic oil transmission system can generally reach 30MPa, its price is cheap and the reliability is high. Therefore, almost all wave energy generation systems based on hydraulic transmission currently use hydraulic pressure. The oil transmission method, among which the well-known wave energy generatio...

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Problems solved by technology

[0002] In order to stabilize the energy fluctuation of wave energy, hydraulic transmission technology has been gradually applied in wave energy power generation systems. The wave energy power generation system based on hydraulic transmission mostly realizes the conversion of wave energy and mechanical energy in the form of hydraulic cylinder work. The oil return and oil inlet of the hydraulic cylinder are adjusted by the energy device. Since the rated pressure of the hydraulic oil transmission system can generally reach 30MPa, its price is cheap and the reliability is high. Therefore, almost all wave energy generation systems based on hydraulic transmission currently use hydraulic pressure. The oil transmission method, among which the well-known wave energy generation devices such as the 750kW Pelamis raft type "Sea Serpent" in the UK, the AWS oscillating float type in the UK, and the 10kW WaveRoller buoyancy pendulum type in Finland, although sealing measures are taken in the above hydraulic system, cannot To avoid a certain amount of hydraulic oil leakage, the leakage of hydraulic oil will cause pollution to the marine environment. In order to reduce or avoid the pollution of seawater by the hydraulic transmission system, people imagine using hydraulic cylinders to do work instead of hydraulic cylinders. However, due to water The viscosity of the medium is low, and the rated pressure of the system is generally about 10MPa. High-pressure water / seawater hydraulic devices are not only expensive, but also have a high failure rate, which limits the use of hydraulic cylinders in wave energy hydraulic transmission systems.

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