Marine two-way pump

Abstract

The marine bidirectional pump of the present invention is composed of a pump body, a rotor, a piston, a spacer tongue sleeve, a spacer tongue and an eccentric shaft. The axis of the eccentric shaft has an eccentricity E1 to the axis of the inner chamber of the pump; one end of the eccentric shaft is directly connected to the extension shaft of the motor. , the other end is inserted into the eccentric sleeve mounted on the waist of the piston, and is keyed to it; the axis of the eccentric sleeve has an eccentricity E2 to the axis of the eccentric shaft. The invention utilizes the principle of eccentric mechanism to realize the suction and discharge function of the pump. When the rotor rotates, the piston reciprocates along the radial through hole while rotating under the action of the eccentric shaft, sucking liquid from the suction chamber and then discharging liquid from the discharge chamber. The barrier of the diaphragm creates a pressure difference between the discharge chamber and the suction chamber. The effect of the present invention is: the motor can send liquid in both directions in forward and reverse directions, has strong self-priming performance, has the function of "self-recovery after cut-off", is highly efficient and energy-saving, and has strong adaptability to the inclination and swing of the hull. A safety valve to prevent the motor from being overloaded and burned.

Description

technical field [0001] The invention relates to a displacement pump, in particular to a marine bidirectional pump. Background technique [0002] There are many types of ships today, but whether it is a container ship, a cargo ship, a passenger ship, a passenger-cargo ro-ro ship, or a car-passenger ferry, the structure is equipped with water chambers for ballasting the hull and making the hull achieve front-to-back or left-right balance. , water is supplied or pumped from the water pump to the water chamber; since the current marine pumps, no matter whether they are reciprocating or centrifugal, are all one-way pumps for one-way water delivery; therefore, water delivery and pumping are completed by two pumps respectively; the result The reason is that the unit occupies a larger area of ​​the engine room, has more piping systems, and costs more. If the pump used is a two-way pump, then the number of pumps can be reduced by half, the piping system can be reduced by half, and t...

AI Technical Summary

Problems solved by technology

Through structural analysis, the former application does not have bidirectionality, regardless of whether the impeller is rotating forward or reverse, the liquid flow cannot be input from the radial direction of the impeller and output from the axial direction; the shortcoming of the bidirectional pump of the latter application is that it cannot be self-priming , two vacuum pumps need to be responsible for self-priming during forward and reverse rotation; and the two impellers are arranged opposite to each other, which interferes greatly and has low efficiency; positive displacement reciprocating pumps have extremely high self-priming performance and high efficiency, but due to There are inlet and outlet one-way valves, and the pump cannot be used in reverse. If the positive displacement reciprocating pump removes the one-way valve through technical measures to achieve two-way liquid delivery, it will make a breakthrough in ballast marine pumps.

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