Active type hydraulic energy-storing device based on linear motor
A technology of hydraulic energy storage and linear motor, applied in circuit devices, battery circuit devices, fluid pressure actuation devices, etc., can solve problems such as low energy recovery efficiency, low energy density, and inability to perform energy exchange, and achieve energy recovery efficiency High, high energy density effect
Active Publication Date: 2020-09-11
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology
However, liquid-pneumatic accumulators are suitable for stable working conditions, but in the face of complex working conditions, liquid-pneumatic accumulators still have the following technical problems: 1) Passive working mechanism, poor adaptability to working conditions; 2) Large fluctuations in working pressure , low system stability; 3) Compressed gas energy storage leads to low specific energy and low energy recovery efficiency
However, due to the relatively simple energy conversion process, energy exchange cannot be performed between energy modules, resulting in an uncontrollable state of energy storage, so its energy density is low and energy recovery efficiency is not high.
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[0014] The present invention will be described in detail below in conjunction with the drawings and specific embodiments.
[0015] The present invention provides a linear motor controllable energy storage device, which is characterized in that it includes a controller 1 , a piston rod 2 , a hydraulic energy storage unit 10 , an electric energy storage unit 20 and a gas energy storage unit 30 .
[0016] The hydraulic energy storage unit 10 includes a reversing valve 11 , a two-position three-way reversing valve a12 , a hydraulic cylinder 13 , a two-position three-way reversing valve b14 , a one-way valve a15 , a one-way valve b16 and a hydraulic cylinder piston 17 .
[0017] The electric energy storage unit 20 includes a linear motor stator 21 , a linear bearing 22 , a permanent magnet 23 , a coil 24 , a storage battery 25 and a motor controller 26 .
[0018] The gas energy storage unit 30 includes an air bag a31, a reversing valve a32, a cylinder 33, a cylinder piston 34, a re...
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The invention provides an active type hydraulic energy-storing device based on a linear motor. The active type hydraulic energy-storing device based on the linear motor comprises a controller, a hydraulic energy-storing unit, an electrical energy-storing unit and a gas energy-storing unit. By utilizing the work principle of the linear motor in the electrical energy-storing unit, the hydraulic energy-storing unit, an electrical energy-storing unit and the gas energy-storing unit are combined to store energy, and meanwhile the controller is utilized to control corresponding valves according to the work condition of a main oil channel; and in this way, redundant energy generated by an external device is effectively recycled, energy reutilization is achieved, the energy density of a conventional hydraulic energy accumulator is improved, and the problem that the pressure of oil liquid cannot be controlled when the conventional hydraulic energy accumulator releases the oil liquid is solved.
Description
technical field [0001] The invention relates to the technical field of energy-saving control of a hydraulic system, in particular to an active hydraulic energy storage device based on a linear motor. Background technique [0002] The hydraulic energy storage device is a hydraulic component widely used in construction machinery, vehicles, ocean energy utilization, heavy machine tools and other fields. Among them, the liquid gas accumulator is the most widely used hydraulic energy storage device. However, liquid-pneumatic accumulators are suitable for stable working conditions, but in the face of complex working conditions, liquid-pneumatic accumulators still have the following technical problems: 1) Passive working mechanism, poor adaptability to working conditions; 2) Large fluctuations in working pressure , the system stability is low; 3) Compressed gas energy storage leads to low specific energy and low energy recovery efficiency. [0003] Therefore, in order to solve th...
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IPC IPC(8): F15B1/10F15B21/14F03C1/26F04B17/03H02J7/14
CPCF15B1/10F15B21/14F03C1/26F04B17/03H02J7/14Y02E60/16
Inventor 肖广鑫贺湘宇蒋瑛贺尚红谭丽莎
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY