DG Multistage Centrifugal Pump

• 

• 

DG multistage centrifugal pump used

DG multistage centrifugal pump for conveying water without solid particles or other liquids, physical and chemical properties similar Yu Qingshui for high pressure boiler water supply or other high pressure water supply.The medium temperature does not exceed 160 ℃.Apply to power plant capacity of unit system and control water supply system.

DG multistage centrifugal pump structure

DG multistage centrifugal pump structure: this type of pump is single shell sectional multi-stage centrifugal pump, mainly composed of stator and rotor, bearing and shaft of most of the back cover.The stator part: mainly by water period, the middle, water and guide vane, etc, from the poles to paragraphs taut, constitute a studio.The suction and discharge nozzles are vertical.Static combining surface depend mainly on metal surface is sealed between paragraphs, and is equipped with type o sealing ring as auxiliary seal.Rotor part: mainly by the shaft, impeller, balance and drum shaft sleeve, etc, pass power to make it work impeller axis;Balance disc (drum) is used to balance the axial force, replaceable shaft sleeve to protect shaft mounted on the shaft.Bearing parts, is mainly composed of bearing, bearing cover and sliding bearing, which in the coupling of the bearing body is equipped with two back-to-back assembled single row angular contact ball bearing, in order to prevent the balance disc (drum) excessive wear, sliding bearing with thin oil lubrication, the bearing body equipped with cooling cavity, but outside water cooling bearing.Shaft seal part: adopt soft packing seal, mainly by bearing frame seal letter body, packing, packing ring, water-cooled gland, etc.Seal chamber into a certain external water pressure, water seal, lubrication, cooling and water and water outside the packing gland for the cooling water, blocking the heat transfer in the direction of the bearing.According to the need, also can use the balance type mechanical seal.Mechanical seal need access to certain pressure of water supply, cooling lubrication flushing mechanical seal.Direction of rotation: pump is directly driven by a motor through flexible coupling, look from the motor end pump, pump is clockwise.