A nuclear power fan shock absorber

Abstract

The invention discloses a shock absorber for a nuclear power fan. The shock absorber comprises a base and an upper crown sheet, wherein a plurality of compression springs are arranged between the base and the upper crown sheet, the base is provided with two guide frames, and two guide holes are respectively formed in the top surfaces of the guide frames; the bottom of the upper crown sheet is connected with four guide bolts, and the guide bolts respectively penetrate through the corresponding guide holes; and the center of the upper crown sheet is further connected with a small crown sheet, and the compression springs are arranged between the small crown sheet and the base. The horizontal size of the small crown sheet is matched up with the distance between the top surfaces of the two guide frames. By adopting the shock absorber for the nuclear power fan provided by the invention, the guide frames and the guide bolts are matched to restrain the displacement of the shock absorber in a horizontal direction, thereby guaranteeing that the fan can not shake in the horizontal direction; and meanwhile, the small crown sheet and the top surfaces of the guide frames are matched to keep the horizontal shearing force born by the guide bolts in a safe range, and the safety of the shock absorber can be guaranteed.

Description

technical field [0001] The invention relates to a shock absorber, in particular to a nuclear power fan shock absorber which is used for vibration reduction of a cooling fan of a nuclear power plant and has extremely high anti-seismic requirements. Background technique [0002] In nuclear power plants, a large number of cooling fans are used to forcibly cool the heat-generating parts. For example, in the top assembly of a nuclear power plant, the control rod drive mechanism will emit a large amount of heat when it is working, and the control rod drive mechanism needs to be cooled by the cooling fan. Forced cooling to maintain the temperature required for proper operation of the control rod drive mechanism coil assembly. At the same time, for the sake of safety, nuclear power fans need to have a higher level of earthquake resistance. For example, the design of the fan should be able to withstand the acceleration load equivalent to 9G in the horizontal direction and 4G in the v...

AI Technical Summary

Problems solved by technology

At the same time, for the sake of safety, nuclear power fans need to have a higher level of earthquake resistance. For example, the design of the fan should be able to withstand the acceleration load equivalent to 9G in the horizontal direction and 4G in the vertical direction. The existing ordinary shock absorber usually has a structure of A base and an upper top plate, and one or more springs are arranged between the base and the upper top plate. This form of shock absorber can only offset part of the vertical vibration, and does not restrict the horizontal direction of the shock absorber, which is easy to cause The shaking of the fan in the horizontal direction cannot meet the all-round high seismic level requirements of the nuclear power plant

Images