Slurry pump industry standards: (1) Scope: This standard applies to the transport of liquid containing suspended solids (such as mines, ash, slime, sand and gravel, etc.) pump. The temperature of the solid-liquid mixture to be delivered does not generally exceed 80 ° C (double pump on the pump liner does not exceed 60 ° C). (2) Terminology 1 High-lift slurry pump: pump with head point greater than 50 m at specified point 2 Low-head pump: pump at specified point less than or equal to 50 m 3 Minimum cross-sectional area of ​​flow passage: Parts of flow cross-section minimum 4 Vulnerable flow parts: Components that easily fail due to erosion of the slurry, such as impeller, casing and guard of double-shell pump, pump body and pump cover of single-shell pump; Rubber lining Metal frame: metal member placed in the rubber to act as holding rubber 6 First Critical Speed: First (lowest) lateral natural vibration frequency of the rotating part of the pump Pump Rotation Speed ​​(3) Pump type single stage, single suction, axial suction, according to the slurry pump housing structure and the direction of the pump shaft is divided into the following three structures: 1 horizontal double shell pump with inner and outer casing - suitable for a variety of outlet diameter Of the pump, the inner shell of the material is divided into three categories of metal, rubber and other non-metallic materials, the inner shell of different materials should be interchangeable within the same shell 2 vertical or horizontal single-shell pump - for discharge diameter less than or equal to 200mm low-lift pump 3 drive shaft end of the pump as a cis 4-clockwise direction for the use of the sub-type of pump impeller seal, which allows low efficiency up to 5% (4) Performance clinch impeller 1 should not exceed a maximum head of 63m. The maximum allowable linear speed should not exceed 30m3 / m 2 bearing the general choice of rolling bearings, and the use of thin oil or grease lubrication, the working temperature should not exceed 75 ℃ 3 pump gear housing selection of flexible couplings, belts or hydraulic Coupler and so on. Couplings, V-belts and pulleys shall be provided with safety shields; 4 For bivalve pumps with rubber inner shells, the maximum size of the solid particles in the slurry should not exceed 3 mm and there is no sharp water chestnut; for single-shell pumps, the metal The inner shell of the double-shell pump, the maximum size of solid particles in the slurry should not exceed 80% of the minimum size of the flow cross-section; 5 packing seal water pressure should be higher than the pump outlet pressure 35kpa.
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