Multistage pump manufacturing process

Multistage pump manufacturing process
Before starting the multistage pump inspection: the name of the lubricating oil, model, main performance and filling amount is in compliance with the requirements of technical documents;Bearing lubrication system, sealing system and cooling system are in good condition, bearing oil, the water was clear;Dish of acting pump rotor 1 ~ 2, to check whether there is friction or rotor stuck phenomenon.Multistage pump near the coupling or belt protection device, such as whether there is obstruction of sundry, anchor bolt is the basis of pump, bearing, motor is loose.Multistage pump valve working system or accessory device shall be in the position of the minimum pump running load, the export control valves should be closed.
Start the multistage pump, to see if the impeller to agree with design steering, if inconsistent, must take the rotating impeller has come to a full stop and adjust the motor wiring, can start again.Multistage pump before starting, the pump casing and the suction pipe must be full of water, this is because of the presence of air, multistage pump suction vacuum forming and maintaining population.Conveying high temperature liquid multistage pump, such as power plant boiler feed pump, must first before start the multistage pump pump.Feed water pump at startup, this is because the high temperature water through the pump, the pump body quickly raise temperature from room temperature to 100~200 ℃, it will cause the pump and the temperature difference between the various components inside and outside, without a long enough time and appropriate control measures of temperature rise, heat transfer can make uneven expansion throughout pump, pump body parts caused by deformation, wear, vibration and bearing axis accident.
Check whether there is any loose phenomenon on multistage pump pipe road and the junction.Turn the multistage pump with the hand, and proved the multi-stage pump is flexible, to join bearing the body bearing lubrication oil, should observe the oil level in oil mark the centerline, lubricating oil should be promptly replace or supplement, unscrewed the multistage pump pump body of water diversion plug, pouring water diversion, close out of the water gate and export of pipeline pressure gauge and imported vacuum gauge.Multistage pump power motor, and proved motor steering is correct.
Multistage pump stopped for a long time, the pump must be opened entirely, dry moisture, rotating parts and junction are coated with grease pack good, try to control the capacity and head of the multistage pump, within the scope of the specified on the sign to ensure that the multistage pump running at peak efficiency, to achieve maximum energy saving effect.Multistage pump in the process of operation, the bearing temperature no more than the environment temperature to 35
, the highest temperature should not exceed 80, in case of abnormal sound of a multistage pump should immediately stop check.
Multistage pump to stop using, first close the gate valve, pressure gauge, then stop the motor, in the first months of work, the oil change 100 hours, after every 500 hours, the oil change once, often adjust the packing gland, packing materials indoor drip situation is normal.Regularly check the abrasion of multistage pump shaft sleeve, wear after the larger should be replaced in a timely manner, when used in cold winter season, parking, the lower part of pump body must be drain plug unscrew put net medium, to prevent the frost crack.To start the motor, after the multistage pump operation, open the outlet pressure gauge and imported vacuum pump after it shows that proper pressure, gradually open the gate valve, check the motor load condition at the same time.