Hydraulic power antiresonance isolation device

Abstract

The invention discloses a hydraulic power antiresonance isolation device. The hydraulic power antiresonance isolation device comprises a hydraulic cylinder, a welding corrugated pipe, a main mass, a base, spiral springs and a suspension mass; the welding corrugated pipe, the main mass, the base, the suspension mass and the hydraulic cylinder are coaxially arranged; the suspension mass is sealed at one end of the welding corrugated pipe; the other end of the welding corrugated pipe is communicated with the hydraulic cylinder; the main mass is connected with the hydraulic cylinder for driving hydraulic oil in the hydraulic cylinder to perform a linear reciprocating motion; the base is used for supporting the hydraulic cylinder; the spiral springs are connected between the main mass and the base; multiple spiral springs are provided, and are uniformly arranged in the peripheral direction of the main mass; and the hydraulic cylinder is a single-piston rod single-acting hydraulic cylinder. Compared with the prior art, the hydraulic power antiresonance isolation device is easy to realize high lever ratio, simple in structure, easy to determine a main spring rigidity value, excellent in spring rigidity linearity, adjustable in parameters and convenient to disassemble.

Description

technical field [0001] The invention relates to the field of vibration isolation of engineering structures, in particular to a hydraulic dynamic anti-resonance vibration isolation device. Background technique [0002] The propeller is the main propulsion device of ships and ships. The spatial inhomogeneity and time inhomogeneity of the incoming flow at the stern of the ship are the two excitation sources for the longitudinal pulsation force at the blade. The spatial inhomogeneity mainly leads to the speed-related blade frequency and its multiple frequency characteristics, which have obvious narrow-band line spectrum characteristics, while the temporal inhomogeneity mainly leads to broadband excitation and induces the natural vibration of the propeller-shaft system, including the propeller natural mode and The first-order longitudinal mode of the shafting. These two kinds of pulsating forces, especially the longitudinal low-frequency components, cause the hull longitudinal ...

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Problems solved by technology

[0005] Aiming at the deficiencies in the above-mentioned background technology, the present invention proposes a hydraulic dynamic anti-resonance vibration isolation device, which solves the strong nonlinearity of the main spring in the traditional dynamic anti-resonance structure through the improvement of the traditional dynamic anti-resonance structure. , the disadvantage that the stiffness value is large and not easy to determine

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