Piston type energy accumulator capable of generating electricity

Abstract

The invention belongs to the field of hydraulic system energy storage devices, and particularly discloses a piston type energy accumulator capable of generating electricity. The energy accumulator comprises a shell, a gas end cover, an oil end cover and a piston, wherein the gas end cover and the oil end cover are respectively arranged at two ends of the shell; a coil is arranged in the gas end cover; the coil penetrates through the gas end cover and is connected with an external electricity storage and utilization device; the piston is movably installed in the shell and is a convex piston, an annular magnet is installed on a boss of the convex piston, and when the piston moves in the shell, the annular magnet penetrates through the coil. Pressure pulsation in a medium-pressure and high-pressure hydraulic system can be absorbed, noise can be reduced, meanwhile, the piston reciprocates between a gas cavity and an oil cavity to drive the annular magnet to form a moving magnetic field with non-uniform strength, the moving magnetic field generates magnetic flux change when penetrating through the coil, and then the electromagnetic induction phenomenon is generated, so that vibration energy can be converted into electric energy to supply power to an electricity storage device or an electricity load.

Description

technical field [0001] The invention belongs to the field of hydraulic system energy storage devices, and more specifically relates to a piston type accumulator capable of generating electricity. Background technique [0002] In medium and high-pressure hydraulic systems, due to the working principle and structural characteristics of hydraulic pumps, the actions of control components and actuators, etc., there are inevitably flow and pressure pulsations in the hydraulic circuit, which may easily cause vibration of pipelines and components, and even Make noise. As an energy storage device in the hydraulic system, the accumulator is often used to absorb pulsation and reduce noise. [0003] Utilizing the vibration energy generated by the flow and pressure pulsation in the accumulator for power generation to achieve energy recovery can improve energy utilization and is an important way to save energy. Patent 2019108974584 connects one end of the power generation device with th...

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Problems solved by technology

[0004] Judging from the current use of accumulators, most of them are purely used to absorb pressure pulsations and reduce noise. The vibration energy generated in this process is completely dissipated, while a few use the energy storage function of The external power generation system generates power by releasing the pressure energy of the accumulator, and there are many intermediate links, resulting in a relatively large and complex system with low transmission efficiency

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