Constant-flow large-pressure-change adjusting centrifugal pump unit

Abstract

The invention relates to a constant-flow large-pressure-change adjusting centrifugal pump unit. The outlets of four centrifugal pump units are connected with the inlet of a flow collecting pipe through four sets of flow distributors; an electro-hydraulic executor is in operating connection with the flow distributors through a hydraulic execution assembly; a controller is connected with the electro-hydraulic executor; the controller outputs a control signal to the electro-hydraulic executor; and the electro-hydraulic executor operates the flow distributor through the hydraulic execution assembly, so that the four centrifugal pump units can realize the working mode that one centrifugal pump unit operates or at least two centrifugal pump units operate in tandem or parallel combination, and the requirement characteristics of constant flow and large pressure change of a ship balanced water supply system are met through conversion of different working modes. When the characteristic of a system pipeline of the pump units is changed, for example, the resistance of the system pipeline is changed in a large range, constant-flow water supply and pump unit output pressure large-range continuous adjustment under designed parameters can be realized, the pump units are guaranteed to still work at high-efficiency interval, and low vibration noise and sediment resistance are achieved, so that the water supply demand of a ship specific system is met.

Description

technical field [0001] The invention relates to a regulating centrifugal pump group used in a balanced water supply system of a ship, in particular to a constant flow and large variable pressure regulating centrifugal pump group. Background technique [0002] Marine pumps refer to various pumps for ships that meet the requirements of ship specifications and marine technical conditions. They are often used to transport various liquids such as seawater, fresh water, sewage, lubricating oil and fuel oil on board. Due to its system characteristics, the balanced water supply system of ships requires the marine pumps to have the characteristics of constant flow, wide variable pressure range, and strong ability to resist sediment and solid impurities. The ship bilge drainage system also has similar requirements for the associated pump sets. The system adopts a centrifugal pump, which has a strong ability to resist solid particles of sediment. However, when the characteristics of t...

AI Technical Summary

Problems solved by technology

The system adopts a centrifugal pump, which has a strong ability to resist solid particles of sediment. However, when the characteristics of the pipeline of the water supply system change, the water supply will change accordingly, which seriously affects the water supply demand of the ship; , using displacement pumps such as plunger pumps and screw pumps, but the vibration and noise of the displacement pumps are relatively large, which has a great impact on the working and living environment of the ship. At the same time, the displacement pumps have poor resistance to impurities such as sediment and solid particles. Larger volume, higher maintenance cost

Therefore, at present, there is no suitable pump product that can better meet the constant flow, large variable pressure continuous and efficient regulation of the ship's balanced water supply system.

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