Gravity energy storage device

Abstract

The embodiment of the invention provides a gravity energy storage device, and relates to the technical field of gravity energy storage. The gravity energy storage device comprises a motor, a transmission assembly, an outer sleeve, an inner sleeve, a gravity block and a generator. The gravity block and the inner sleeve are arranged in the outer sleeve, the gravity block is in sliding fit with the outer sleeve, the sliding direction of the gravity block is the vertical direction, the gravity block is arranged on the inner sleeve in a sleeving mode and is in threaded connection with the inner sleeve, the motor, the transmission assembly and the inner sleeve are sequentially in transmission connection, and the motor is used for driving the transmission assembly to drive the inner sleeve to rotate. The inner sleeve is used for driving the gravity block to move in the vertical direction, the generator is in transmission connection with the transmission assembly, and the gravity block is used for driving the inner sleeve and the transmission assembly during free falling to drive the generator to generate electricity. The gravity energy storage device can change the direction of force for maintaining gravitational potential energy, free falling operation caused by gravity under the fault condition is avoided, and the safety risk is reduced.

Description

technical field [0001] The invention relates to the technical field of gravity energy storage, in particular to a gravity energy storage device. Background technique [0002] With the increase in the proportion of intermittent renewable energy installed capacity, there is a large randomness in the power generation side of the power system, and the safe and stable operation of the power grid is facing great challenges. As a device for storing electric energy, power energy storage can stabilize power peaks and valleys, promote the consumption of renewable energy, and ensure local safe electricity consumption. It will play an increasingly important role in the future power system. [0003] Electric energy storage can be divided into mechanical energy storage and chemical energy storage according to the energy storage form. Among them, gravity energy storage is a kind of mechanical energy storage. The weight is lifted to a high place by electricity to increase its gravitational...

AI Technical Summary

Problems solved by technology

[0004] However, most of the existing gravitational energy storage uses hoisting devices to raise the height of heavy objects, that is, the force to increase and maintain gravitational potential energy is opposite to the direction of gravity

According to the principle of motion balance, when the hoisting device fails, the gravity is instantly greater than the lifting force, and the heavy object falls rapidly under the action of gravity, which may easily lead to safety accidents

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