It is widely used in metallurgy, national defense project, civil air defense project, mine, tunnel, chemical industry, water conservancy project, electric power engineering and highway engineering. The mortar pump has the advantages of small volume, light weight and flexible and convenient for conveying vertical and horizontal mortar. Grouting grouting operation and medium delivery. The main components of the mortar pump impeller, pump housing and shaft seal device. 1 impeller Open impeller on both sides of the blade without cover, suitable for conveying materials containing a larger amount of suspended solids, low efficiency, rarely used. Semi-closed impeller on the suction side of the cover without cover, and on the other side of the cover, suitable for conveying sediments or particles containing materials, the efficiency is also low; closed impeller blades on both sides of the front and rear cover, High efficiency, suitable for conveying liquids without impurities. Closed impeller has a single suction and double suction in two ways. 2 pump shell role is to seal the impeller in a certain space, so that the role of impeller suction and out of the liquid. Pump casing made of spiral shape, it is also known as the volute. Due to the gradual enlargement of the cross-sectional area of ​​the flow passage, the high-speed liquid thrown out from the impeller gradually reduces the flow velocity and effectively converts part of the kinetic energy into static pressure energy. Pump housing not only brings together the liquid thrown by the impeller, but also an energy conversion device. 3 shaft seal device is to prevent the liquid within the pump casing leakage along the shaft or outside air leakage into the pump casing. Common shaft seal packing seal and mechanical seal two. Fillers are generally impregnated with oil or asbestos rope coated with graphite. Mechanical seal is mainly achieved by the relative movement between the moving ring mounted on the shaft and the stationary ring fixed on the pump casing to achieve the sealing purpose.

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