Hydraulic servo buffer capable of achieving active control

Abstract

The invention discloses a hydraulic servo buffer capable of achieving active control. The hydraulic servo buffer is characterized in that a low-pressure energy accumulator with a switch valve is connected with a hydraulic constant delivery pump with a motor, the hydraulic constant delivery pump is connected with an inlet of a one-way valve, an outlet of the one-way valve is connected with an oil inlet of a hydraulic servo valve with a hydraulic servo amplifier, an oil return port of the hydraulic servo valve is connected with an oil outlet of the low-pressure energy accumulator, two ports of an oil outlet of the hydraulic servo valve are connected with two oil inlets of a hydraulic lock, oil outlets of the hydraulic lock are connected with a rodless cavity and a rod cavity of a hydraulic cylinder respectively, and a pressure sensor is arranged on a pipeline which enables the hydraulic lock and the rodless cavity to be connected; and a displacement sensor is arranged on a piston rod inthe hydraulic cylinder, the outer end of the piston rod of the hydraulic cylinder is hinged to a sliding block through a spherical hinge, and the sliding block is arranged on a guide rail corresponding to the sliding block. According to the hydraulic servo buffer capable of achieving active control, the responding speed and the control precision are high, specified loads are applied to a system, and then the requirements of some high-grade, precision and advanced special occasions on load reducing are achieved.

Description

technical field [0001] The invention relates to a hydraulic shock absorber, especially a servo-controlled hydraulic shock absorber. Background technique [0002] Part of the current hydraulic buffer is a combination of a hydraulic cylinder and a mechanical spring. The process of compressing the buffer is the process of squeezing the oil through the piston to do work. This process consumes a lot of kinetic energy and acts as a buffer. When the work is finished, the piston is pushed to the original position by the return spring to complete a working cycle. This kind of hydraulic buffer has long response time, low control precision and long recovery time, and cannot control the hydraulic oil pressure after buffering, and cannot meet the requirements of high precision and fast response vibration reduction occasions. Another type of buffer is that the servo spool is integrated into the hydraulic cylinder. The overall action of the hydraulic cylinder is realized through the mech...

AI Technical Summary

Problems solved by technology

This kind of hydraulic buffer has long response time, low control precision, long recovery time, and cannot control the hydraulic oil pressure after buffering, and cannot meet the requirements of high-precision, fast-response vibration reduction occasions

Another type of buffer is that the servo spool is integrated into the hydraulic cylinder. The overall action of the hydraulic cylinder is realized through the mechanical structure. The buffer response during this buffer period is fast and the precision is high, but it still cannot realize the separate circulation of the oil and requires manual work. Mechanical assistance, while converting the linear motion of the hydraulic cylinder into curved motion requires a complex mechanical structure

[0003] Now some occasions that require high control accuracy require that when the load is reduced: when the system is overloaded, the load should be reduced within a time of no more than 0.2s, but in order to meet the requirements of certain functions of the system, it is necessary to convert part of the load into acceleration and reduce the load at the same time The position of the system's load-reducing receiving part changes in a curve, and it is in a different position in the overload and normal state. It is difficult for the existing buffer to meet the action requirements of the system.

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