[Asia Pump Network News] Electric reciprocating pump in use, if you want to extend its life expectancy, pay attention to routine maintenance is a good way. So the electric reciprocating pump in the daily maintenance of how it? Now Xiaobian tell you the way, as follows: Routine maintenance of electric reciprocating pump (1) electric reciprocating pump pump cylinder. The reciprocating pump's pump cylinder is a machined cylindrical body with a flared end at one end for easy installation of the piston assembly. Large and medium-sized pump to prevent seawater corrosion, often in the cylinder plus bronze cylinder liner. Pump cylinder liner circularity and cylindrical degree should meet the requirements. After the piston ring is loaded with light inspection, the light leakage on the entire circumference should not be more than 2, and the distance from the opening is not less than 30 °, and the arc length of each radial clearance is not more than 45 °. When necessary, the inner diameter of the cylinder can be used to measure the circularity and cylindricity of the cylinder liner. If it is found that the wear exceeds the standard, the cylinder needs to be borne and a new piston replaced. Boring cylinder, the thickness reduction should not exceed 15%, otherwise it should be replaced. (2) electric reciprocating pump piston ring. Piston ring is a certain elasticity of the open ring, the mouth with a straight mouth or ramp (45 ° or 60 ° angle) two. Piston ring relies on its own elastic close to the cylinder wall and prevent leakage. Piston ring work too long due to excessive wear and take the gap becomes larger, more than the required value should be replaced. New piston rings and ring groove axial and radial clearance should also meet the requirements. New non-metallic piston rings (expansion ring 0 is often made of cloth bakelite, before use should be soaked in hot water for a period of time, softened and removed, so that opening up to about 8mm, and so on after cooling into the cylinder and Ring groove, check the value of the gap, in line with the requirements before loading. Install the piston ring, the upper and lower rings of the mouth to be staggered 120 ° or 180 °. (3) electric reciprocating pump valve. Is a wearing parts.As the liquid valve plate surface and seat erosion and work between the collision between the two, it will cause the rust and wear with the mating surface, resulting in the valve closed lax.To do this should be regularly checked, if found If there is a slight scar, it can be grinded with grinding sand; if the etching is deeper, the grind can be carried out after polishing the lathe first. In addition, the spring tension of the valve should be close and the free height should be basically equal. Excessive loss of elasticity, the freedom to reduce the height of more than 5%, should be replaced. Valve assembly should check the valve landing flexibility, sealing and connection tightness. (4) Electric reciprocating pump stuffing box. Degree of tightness should be moderate, with stuffing box does not heat, A small amount of liquid drip (about 60 drops per minute) is appropriate to lubricate and cool the piston rod.When the soft packing wear leakage increases, can alternately compress the packing gland alternately, be careful not to skew.When the filler with a long deterioration The filler must be replaced when it is too hard to seal, and the width of the new packing should be chosen according to the radial clearance of the piston rod and stuffing box (slightly widened and suitable for hammering), the length should be able to surround the piston rod for one week, , The lap filling of each circle should be staggered by the lap loading. Further reading: China Building Water Expo Guangzhou World Expo Industrial Internet (Xiamen) Technology Co., Ltd. Asia Pump Network Editor: He Duanhui (QQ / WeChat:) /beng.liuti.cn/ (Service Hotline:)
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