Stainless steel self-priming pump structure type many, which, outside the mixed type stainless steel self-priming pump working principle is: before the start of the pump first in the pump shell irrigation with water (or pump shell has its own water). After the start of the high-speed rotation of the impeller to the flow in the impeller channel to the vortex shell, then the entrance to form a vacuum, so that water backstop the door open, suction tube of air into the pump and the impeller channel to reach the outer edge. On the other hand, by separating gas and water into the impeller chamber and the water flow by about hole to return to the outer edge of the impeller. After the left back hole flows back to the water in the role of pressure difference and gravity, shooting at the impeller channel, and was crushed impeller, and inhalation of air pipes to a mixture of swing to scroll to the rotation direction of the flow. And then right to water in the backwater hole converging flow along the spiral flow. As the liquid in the volute and continuous impact of cascade, continue to be crushed impeller, the strong mixing with air, produce gas water mixture, and the constant flow causing air and water can not be separated. The mixture was separated at the volute tongue export stripping along the short tube into the separation chamber. In the separation of indoor air is separated from the outlet pipe to drain, while the water is still by the left and right of the backwater hole flow to the outer edge of the impeller and and the suction pipe air mixed phase. This repeated cycle, gradually inhaling pipe to make the air, so that the water into the pump, to complete the process of self absorption. Stainless steel self sucking sewage pump

    Internal mixing type stainless steel self-priming pump, and mixed type self-priming pump are the same and the difference just does not flow to the outer edge of the impeller of the backwater, and flows to the impeller inlet. Within the mixed type self-priming pump at startup, have to open the bottom of the impeller before the return valve, the liquid flow back to pump impeller entrance. The water in the high-speed rotating impeller and the suction pipes under the gas mixture to form a row of gas water mixture to the separation chamber. Here the air is discharged and the water is returned from the return valve to the impeller inlet. So repeatedly, until the air exhausting, suction Sheung Shui to come.

    Stainless steel self priming pump self-priming height, and impeller clearance before sealing, pump rpm, separation chamber liquid height and other factors. Impeller seal gap is small, self-priming height of the larger, generally taken to be 0.3 ~ 0.5 mm; in the gap increases, except self-priming height decreased, the pump head and efficiency decreased. The pump self-priming height increased with the increase of the circumference of the impeller speed U2, but to the largest self-priming height and speed increase and self-priming height did not increase, but at this time to shorten the time of self - priming; when the rotation decline self-priming height is decreased. In the other conditions remain unchanged, self-priming height also increases as the height of the water storage increased (but not exceeding the separation chamber of the best reservoir water level). In order to self-priming pump better the mixture of gas and water, the impeller blades to be less, cascade section distance increases; and should adopt the semi open impeller (or impeller channel wide impeller), which is more convenient in - depth into the backwater cascade of impeller. Stainless steel self-priming pump supporting most of the internal combustion engine, mounted on a mobile small car, suitable for field work.