Valve spool transfer combined hydraulic shock excitation control valve

Abstract

The invention discloses a valve spool transfer combined hydraulic shock excitation control valve comprising a valve body, a valve spool, a valve sleeve, a rotary motor end cap, a connector, a spring, a plug, a linear motor and a rotary motor. The valve sleeve is fixedly arranged in an inner cavity of the valve body, and the valve spool is arranged in the valve spool movably; the valve spool can rotate relative to the valve sleeve as well as move axially in the valve sleeve. An oil outlet is opposite to an oil return opening in direction, axial fluid power is weakened along the direction of total force, analysis shows that the direction of total force faces the end of the linear motor, the gap of a lead screw during adjustment can be eliminated by combined action with a compression spring, and axial positioning during operation only depends on limit of the lead screw so as to improve accuracy and stability of axial positioning. The invention further discloses a hydraulic system adopting the valve spool transfer combined hydraulic shock excitation control valve.

Description

technical field [0001] The invention relates to a control valve, in particular to a spool transfer composite hydraulic vibration control valve. Background technique [0002] Auto parts, aerospace, ships, vibrating screens, vibrating pile hammers, vibrating screens and tamping machines have higher and higher requirements for products. In product performance testing, fatigue testing is required. Because vibration equipment can change the original state of the object being excited, such as the position and force, it has attracted more and more attention. Vibration equipment includes vibrator and vibrating table. The principle of vibrator and vibrating table is similar, and the key components are the excitation system. Vibrator can be divided into mechanical, electric, electro-hydraulic. The structure of the mechanical exciter is simple, the cost is low, the installation is convenient, the maintenance is easy, the amplitude does not change with the frequency change, but the ...

AI Technical Summary

Problems solved by technology

However, there are many problems in its rotary valve structure, such as the difficulty and complexity of sealing the two shaft ends of the spool; the control of the axial displacement of the spool is unreliable, and a small amount of movement will occur in the axial direction; the matching relationship between the valve sleeve and the spool causes the valve The core is subjected to relatively large hydraulic force; the linearity of the axial displacement to adjust the flow is not good, etc.

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