shs03044-1992高速離心泵維護檢修規(guī)程doc-資料下載頁
2025-07-15 11:40本頁面
【正文】 liquid sufficiently.Repair the leaks or clean the line.Increase the suction head.Rewire the motor.Reassemble.Check and repair.Large fluctuation of pressure The flow is too low.The suction head is low.The flow control valve fails.The feed is not sufficient for two pumps while they are running in parallel.The cyclone separator is seriously corroded.Increase the flow, open the bypass valve if necessary.Increase the suction head.Repair the control valve.Stop one pump.Repair or replace the cyclone separator.Overload of motorThe viscosity and specific gravity of feed liquid is increased or the solid particles are entrained.Mechanical faults.The inner surface of pump is seriously eroded.The throat diameter of diffuser is enlarged.Change the conditions of feed liquid to prevent the solid particles from being entrained.Disassemble, check and repair.Replace the parts.Inspect and repairLeaks of mechanical sealThe mechanical seal is damaged.Solid particles or foreign matters are entrained by seal liquid or feed liquid.Moisture is entrained when transferring low temperature feed liquid. Check and replace the mechanical seal.Install a strainer to prevent the solid particles or foreign matters from being entrained.Prevent moisture from being entrained or fill the antifreezing agent into the seal chamber before the startup.Oil leaks of oil sealThe oil seal is damaged.Replace the oil seal.Too much oil foam in the speedup gearbox.The oil is deteriorated.The oil level is too high.The oil temperature is too low.Change oil.Reduce the oil quantity.Adjust the cooling water quantity.The oil inside the speed up gearbox changes color into white, pink or yellow.The lubricant is mixed with water.The lubricant is mixed with operating liquid.Check for leaks of oil cooler.Check the lubricant.The oil temperature inside the speed up gearbox is too highThe oil is too much.The oil filter is blocked.The oil cooler is scaled or the water quantity is insufficient.Drain the oil.Replace the oil filter.Remove the scale or adjust the cooling water quantity.The quantity of lubricant in the speed up gearbox reduces sharply. Seal leaks from the input shaft.Seal leaks from the output shaft.Inner leaks of the oil cooler.Change seal if necessary.Change seal if necessary.Check for leakage of oil cooler, repair or replace the cooler.Large vibration or noiseThe gear, bearing bush or bearing are seriously worn.The impeller and inducer are seriously worn or eroded resulting in the lost of balance.Gas is entrained by the suction feed liquid or air cavitation occurs due to the low suction head.Check, repair and replace.Repair or calibrate the dynamic balance.Remove gas from the feed liquid, increase the suction head. Explanatory notes:The Procedure is drafted under the charge of Tianjin Chemical and Petroleum Corporation.The draftsman of the Procedure is Li Bengui.9
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