Rapid Feeding System of Hydraulic Cylinder Based on Hydraulic Servo Closed-loop Control

Abstract

The invention discloses a hydraulic cylinder fast feeding system based on hydraulic servo closed-loop control. The hydraulic cylinder fast feeding system comprises a power system, a control system, an executive assembly and an auxiliary device. The power system includes a hydraulic pump, a motor and an energy accumulator, wherein the motor and the energy accumulator are connected with the hydraulic pump; the control system includes a PLC control unit, a normally-open electromagnetic overflow valve, a servo valve and a linear displacement sensor arranged in a servo control cylinder; the executive assembly includes the servo control cylinder, a proportional accelerated cylinder and a fast feeding cylinder, wherein the proportional accelerated cylinder is located above the servo control cylinder, and the fast feeding cylinder is communicated with the proportional accelerated cylinder; the auxiliary device includes an oil tank and a pressure relay, wherein the oil tank is arranged on a base, and the pressure relay is connected with the servo valve. The hydraulic cylinder fast feeding system is low in system flow, small in size and capable of saving cost and reducing energy consumption; besides, the hydraulic cylinder fast feeding system is simple and compact in structure, easy to implement, and suitable for being popularized in an all-around way.

Description

technical field [0001] The invention belongs to the technical field of mechanical manufacturing, and relates to a hydraulic cylinder fast-feeding device, in particular to a hydraulic cylinder fast-feeding system based on hydraulic servo closed-loop control. Background technique [0002] The rapid feeding device of the hydraulic cylinder is to realize the rapid extension of the piston rod of the hydraulic cylinder and realize the closed-loop control of the acceleration and deceleration process. According to the basic formula of fluid dynamics, the average flow velocity V of the flow section is equal to the flow Q ratio of the flow section to the area A of the flow section, that is, V=Q / A, because the movement speed of the hydraulic cylinder piston and the flow velocity of the flow section Similarly, it can be seen from the above formula that when the piston area is constant, the movement speed of the piston is proportional to the flow rate. Therefore, if the piston rod of the...

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Problems solved by technology

[0010] The gas-hydraulic cylinder with a large piston diameter supplies a large flow of hydraulic oil to the fast cylinder with a small piston diameter to drive the piston rod of the fast cylinder to move at high speed, but the internal structure of the gas-hydraulic cylinder is that one side of the piston is hydraulic oil and the other side is a certain pressure Nitrogen, the middle is sealed to separate two different media. When used for a long time, the internal leakage problem will directly affect the overall accuracy of the system

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