Volute changeable type marine self-priming centrifugal pump

Abstract

The invention discloses a volute changeable type marine self-priming centrifugal pump. The changeable type marine self-priming centrifugal pump comprises a pump body, a volute, an impeller, pump covers, a water pipe, a shaft seal, a shaft base, a pump shaft and a valve plate. The pump body is a horizontal shell, the two ends of a pump body through hole are provided with the pump covers, the top of the pump body is provided with an upward pump outlet, and a pump inlet is formed in the left side of the pump body, wherein the included angle between the plane where the pump inlet is located and the plane where the pump outlet is located is 90 degrees. The volute is axially positioned and installed in an inner cavity in the right side of the pump body, one face, facing rightwards and provided with a volute channel, of the volute is provided with the impeller, the pump shaft axially penetrating through an impeller inner hole is exposed out of the pump covers at the two ends, and the exposed shaft ends of the pump shaft are sleeved with the shaft seal and the shaft base from interior to exterior respectively to form a double-bearing and double-sealing integrated structure in which the impeller rotates relative to the volute. On the premise that the specification is determined, volutes or impellers with different sizes can be independently exchanged, the volutes and the impellers with the different sizes can be exchanged at the same time, the optimal hydraulic performance matching can be achieved through combination, the pump can operate under the most economical work condition, and the volute changeable type marine self-priming centrifugal pump is especially suitable for vessel mating.

Description

technical field [0001] The invention relates to a water pump, in particular to a horizontal single-stage single-suction self-priming centrifugal pump suitable for matching on ships. Background technique [0002] Large and medium-sized ships are water vehicles with large loading capacity and strong endurance. In addition to corresponding power systems, they are also equipped with a series of support systems such as corresponding lighting systems and water supply systems. Due to the particularity of ships navigating on water, there are higher requirements for the quality of all supporting equipment than land equipment. In addition, limited by objective conditions, the space in the ship's cabin is narrow, and the volume of supporting equipment in the cabin is also strictly limited. Based on the above situation, land-use equipment is not necessarily suitable for supporting ships. Water pumps have many applications in ships, especially domestic water supply systems, fire protec...

AI Technical Summary

Problems solved by technology

However, the existing technical products generally have the problems of small hydraulic performance adjustability and poor reliability in practical applications. The reason is that the existing horizontal single-stage single-suction centrifugal pump is a cantilever structure. Unreasonable force, resulting in poor working conditions of the shaft seal and shaft seat, and short service life

In addition, the water suction port of the prior art product is located at the pump body at the cantilever end of the pump shaft, which causes the length of the pump to be too large and occupies the limited space in the cabin

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