[Urea Knowledge] Daily Question (30) 2010.01.19
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This post was last edited by shiguomiao on 2010-1-27 at 13:11. Please hide the answers in replies; no scoring will be given unless the answers are hidden. Specific hiding method: http://bbs.hcbbs.com/viewthread.php?tid=492556&highlight=%D2%FE%B2%D8 19. Pumps are classified according to their working principle into: ( ), ( ), and ( ). 20. The functions of cooling water for pumps are: ( ), ( ), ( ). 21. The main reasons for the burnout of centrifugal pump bearings are: ( ), ( ), ( ). 19. Pumps are classified by working principle into: (vane pumps), (positive displacement pumps), and (other types of pumps). 20. The functions of cooling water in pumps are: (reducing the temperature of the bearing chamber), (cooling the pump body), and (protecting the mechanical seal). 21. The main reasons for the burnout of centrifugal pump bearings are: (degraded lubricating oil), (overload), (lack of oil)
19. Pumps are classified by working principle into: (positive displacement pumps), (dynamic pumps), and (other types of pumps). 20. The functions of cooling water in pumps are: (lubrication), (cooling), and (cleaning). 21. The main reasons for the burnout of centrifugal pump bearings are: (lack of oil), (high vibration), and (large bearing clearance).
19. Vane pumps, positive displacement pumps, other types of pumps 20. Reducing the oil temperature in the bearing housing, cooling the pump body, protecting the seal 21. Oil emulsification and deterioration, lack of oil, overload
19. Pumps are classified by working principle into: (vane pumps), (positive displacement pumps), and (other types of pumps). 20. The functions of cooling water in pumps are: (reducing the temperature of the bearing chamber), (cooling the pump body), and (protecting the mechanical seal). 21. The main reasons for the burnout of centrifugal pump bearings are: (damaged lubricating oil), (overload), and (lack of oil).
1. Centrifugal, reciprocating, rotary 2. Cooling, lubrication, flushing 3. Poor lubrication, quality issues, improper installation
19. Vane pumps, positive displacement pumps, other types of pumps 20. Reducing the oil temperature in the bearing housing, cooling the pump body, protecting the seal 21. Oil emulsification and deterioration, lack of oil, overload
19. Vane pumps, positive displacement pumps, other types of pumps 20. Reducing the oil temperature in the bearing housing, cooling the pump body, protecting the seal 21. Oil emulsification and deterioration, lack of oil, overload
19. Pumps are classified by working principle into: (positive displacement pumps), (dynamic pumps), and (other types of pumps). 20. The functions of cooling water in pumps are: (lubrication), (cooling), and (cleaning). 21. The main reasons for the burnout of centrifugal pump bearings are: (lack of oil), (high vibration), and (large bearing clearance).
19. Pumps are classified by working principle into: (positive displacement pumps), (impeller pumps), and (jet pumps). 20. The functions of cooling water in pumps are: (reducing the temperature of bearings), (reducing the temperature of mechanical seals), and (cooling the pump support frame, for pumps handling high-temperature media). 21. The main reasons for the burnout of centrifugal pump bearings are: (lack of lubricating oil), (poor installation accuracy, lack of levelness), (poor quality of bearings)
19. Centrifugal pumps, reciprocating pumps, piston pumps 20. Cooling 21. High speed, high load, lack of lubricant
19. Pumps are classified by working principle into: (vane pumps), (positive displacement pumps), and (other types of pumps). 20. The functions of cooling water for pumps are: (reducing the temperature of bearings), (lowering the temperature in the sealing chamber, improving the conditions for sealing and extending its service life), and (cooling the support frame to prevent misalignment). 21. The main reasons for the burnout of centrifugal pump bearings are: (excessive or insufficient lubricating oil, degraded lubricating oil), (misalignment of the unit), and (vibration).