Large hydraulic damper for nuclear power station

Abstract

The invention discloses a large hydraulic damper for a nuclear power station. The large hydraulic damper comprises a pull ring, a piston cylinder with two oil cavities, two damping valves, an oil pipe communicated with the two damping valves and a buckle extending outwards from one end of a cylinder body of the piston cylinder, and the other end of the cylinder body is sealed through an oil cylinder cover; one end of a piston rod of the piston cylinder extends out of the oil cylinder cover and is connected with the pull ring, the pull ring is externally connected with a load, the two damping valves are defined as the first damping valve and the second damping valve which are arranged on the oil cylinder cover and the cylinder body respectively, and the first damping valve is communicated with the first oil cavity through a cylinder cover oil way formed in the oil cylinder cover. The second damping valve is communicated with the second oil cavity through a cylinder body oil way formed in the cylinder body. The large hydraulic damper for the nuclear power station has the advantages that the locking speed of the damper is adjusted by adjusting the compression amount of the spring of the damping valve.

Description

technical field [0001] The invention relates to a large-scale hydraulic damper for nuclear power plants. Background technique [0002] The main equipment of a PWR nuclear power plant includes pressure vessels, reactor coolant pumps, main pipelines, steam generators, pressure regulators and other specially designed safety facilities and equipment. [0003] During normal operation, the nuclear power plant has operating states such as cold state, hot state, full power and non-full power. The temperature of the pipeline connecting equipment and equipment changes with the working conditions of the power plant, which will cause thermal expansion and contraction of the pipeline. When an earthquake occurs, the shock produced by the earthquake causes the equipment on the support to generate an acceleration of 0.5g-15g. [0004] If a rigid connection is used between the equipment and the equipment, the deformation caused by thermal expansion and cold contraction cannot be applied; if...

AI Technical Summary

Problems solved by technology

The larger the diameter of the piston rod, the greater the difference between the effective area on both sides of the piston; under the action of equal loads, the pressure difference of the hydraulic oil on both sides of the piston is relatively large, and the difference in axial deformation is also large, which leads to the damper Axial rigidity varies greatly

In addition, after the conventional nuclear electric damper is manufactured, its locking speed (moving speed of the piston when the locking is triggered) is also fixed, and there is no way to adjust it, which will not be able to meet the individual needs of users

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