Single-screw hydraulic cylinder electrohydraulic vibration exciter

Abstract

The invention discloses a single-screw hydraulic cylinder electrohydraulic vibration exciter comprising a 2D electrohydraulic vibration valve, a single-screw hydraulic cylinder and a loading object, wherein, a piston is arranged in the body of the single-screw hydraulic cylinder; one side of the piston is fixedly connected with a piston rod, and one end of the piston rod extends out of the body of the single-screw hydraulic cylinder; the piston rod is connected with the loading object; a hydraulic fluid port of the inner cavity at one side of the piston in the cylinder body is communicated with a high-pressure oil tank, and the hydraulic fluid port of the inner cavity at the other side of the piston in the cylinder body is communicated with the oil inlet and outlet of the 2D electrohydraulic vibration valve; the 2D electrohydraulic vibration valve comprises a valve body, a valve core and a valve cover, wherein, the valve body is provided with an oil inlet communicated with the high-pressure oil tank, the oil inlet and outlet connected with the body of the single-screw hydraulic cylinder and an oil outlet connected with an oil return tank. The invention can effectively improve exciting frequency, reduces valve opening area amplitude attenuation along with the increase of the exciting frequency, has high energy efficiency, and has favourable antipollution performance.

Description

technical field [0001] The invention relates to a single-rod hydraulic cylinder vibrator. Background technique [0002] As a basic test of modern industry and an important means of product development, vibration test is widely used in many important engineering fields, such as road simulation tests of automobiles and walking machinery; seismic fatigue tests of engineering materials, dams and high-rise buildings, etc. [0003] There are mainly three types of excitation methods: mechanical, electromagnetic and electro-hydraulic. The characteristics of the mechanical vibration table are: simple structure and low cost; There are disadvantages such as mechanical clutter. The electrodynamic vibrating table has the advantages of small waveform distortion and large operating frequency range; however, due to the limitation of inherent magnetic saturation, the electrodynamic vibrating table is not easy to obtain a large excitation force. In addition, the equipment structure is comple...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the existing single-rod hydraulic cylinder exciter, such as low excitation frequency, serious attenuation of valve opening area amplitude with the increase of excitation frequency, low energy efficiency, and poor anti-pollution performance, the present invention provides a An electro-hydraulic exciter for a single-rod hydraulic cylinder that can effectively increase the excitation frequency, reduce the attenuation of the amplitude of the valve opening area with the increase of the excitation frequency, have high energy efficiency, and good anti-pollution performance

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