Self-priming pump has a strong sewage capacity, its energy-efficient advantages also loved by users, good self-priming pump is the biggest bright spot, which is self-priming pump work weapon. All this is due to self-priming pump good structure and structural features, then we will bring self-priming pump structure and structural characteristics of the introduction. Self-priming pump structure and structural characteristics Self-priming pump self-priming height, and the impeller seal clearance, the number of pumps, the separation chamber level and other factors. The smaller impeller seal clearance, the greater the self-priming height, generally taken as 0.3 to 0.5 mm; in the gap increases, in addition to self-priming height drop, the pump head, the efficiency is reduced. Pump self-priming height with the impeller circumferential speed u2 increases, but to the maximum height of self-priming, the number of revolutions increased self-priming height will not increase, this time only shorten the self-priming time; when the number of revolutions As you descend, the level of self-priming drops. The self-priming height also increases with increasing reservoir height (but not beyond the optimal reservoir height of the separation chamber), with all other conditions remaining constant. In order to better self-priming pump gas and water mixing, the impeller blade to be less, so that the blade pitch increases; and should be used semi-open impeller (or impeller channel wider impeller), so that more Easy backwater depth into the impeller cascade. Most of the self-priming pump and internal combustion engine supporting, mounted on a mobile car, suitable for field operations. The main characteristic of the self-priming pump is that the pump body has a double volute structure. The water inlet is above the outer edge of the impeller of the self-priming pump, and the upper part of the water outlet has a relatively large volume of air-water separation chamber. Other structures are the same as single-stage single-suction centrifugal pumps, including mechanical seals, shafts and bearings. Self-priming pump in operation for the first time need to add to the pump shell such as diversion fluid, water injection pump casing in more than self-suction pump axis can be. Do not add water at any time after the suction can automatically start, no need to add water, so self-priming pump is very easy to use. It is often said that sharpening does not mistakenly cut a carpenter. For such self-priming pumps, products that are far away from our lives, if we can get a more detailed understanding of the structure and structural features of the self-priming pump, it will definitely produce better self-priming pump use s help.
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