Portable pure water hydraulic system

Abstract

The invention belongs to the technical field of hydraulic pressure and particularly relates to a portable pure water hydraulic system. According to the portable pure water hydraulic system, a left endcover and a right end cover which are provided with inlet valves and outlet valves are installed at the two ends of a shell body and form a left cylinder cavity and a right cylinder cavity with a cylinder cavity and a piston, the upper and lower two sides of the shell body are provided with cover plates, the cover plates connect an energy converter inside sunken cavities of the shell body in a pressing manner through seal rings and form an inner pump cavity and an outer pump cavity, and the cover plates connect sealing rings inside a communicating cavity of the shell body in a pressing mannerand form a buffer cavity, an outlet hole is connected with the inner pump cavity in series to form an inner pump, an inlet hole is connected with the outer pump cavity in series to form an outer pump, the inner pump and the outer pump on the upper and lower two sides of the shell body are connected in series to form an upper liquid supply unit and a lower liquid supply unit correspondingly through the buffer cavity, inlets of the upper liquid supply unit and the lower liquid supply unit, the left and right outlet valves and energy storage devices are connected with each other through pipelines, outlets of the upper liquid supply unit and the lower liquid supply unit and the left and right inlet valves are connected with each other through pipelines, the energy converter is composed of twopiezoelectric drivers and a gasket, driving units of the drivers deform under the action of direct current voltage and drive the voltage to perform commutation to realize self-excited driving when the sensing unit output voltage reaches the extreme value, and the sensing voltage can represent the piston moving speed and driving force.

Description

technical field [0001] The invention belongs to the technical field of hydraulic drive and control, and in particular relates to a portable pure water hydraulic system. Background technique [0002] Hydraulic and pneumatic systems have the advantages of high energy density, low noise, and no impact, and have been successfully used in various industries in the national economy and defense industry for many years. The traditional pneumatic power system is usually driven by a large electric motor and a mechanical air pump, and realizes the output force, speed and position through the joint operation of multiple types of valves such as reversing valves, pressure reducing valves and speed regulating valves. Therefore, the volume is large, the structural connection and control are relatively complicated, and the application has great limitations: it cannot be used in aerospace, walking robots and other micro systems and remote control systems; at the same time, because the existin...

AI Technical Summary

Problems solved by technology

The traditional pneumatic power system is usually driven by a large electric motor and a mechanical air pump, and realizes the output force, speed and position through the joint operation of multiple types of valves such as reversing valves, pressure reducing valves and speed regulating valves. Therefore, the volume is large, the structural connection and control are relatively complicated, and the application has great limitations: it cannot be used in aerospace, walking robots and other micro systems and remote control systems; at the same time, because the existing pneumatic power system adopts types A large number of air valves are jointly controlled, which makes it difficult to achieve precise control and adjustment of driving force, speed and position, and cannot be used in fields requiring high driving, positioning and control precision, such as precision machining and assembly, precision measurement, and precision optical drive.

Therefore people have successively proposed various types of miniature hydraulic and pneumatic systems, such as Chinese patents 201510843026.7, 201310132556.1, 201410611173.7, etc., because the existing hydraulic or pneumatic systems are driven by a fixed frequency, and their driving force and speed are affected by the actual work. The load has a great influence. When the resonant frequency of the drive element under specific working conditions deviates greatly from the set excitation frequency, the gas output and pressure will drop significantly, and the drive calculated according to the set drive voltage and frequency will Force and velocity accuracy is also low

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