Tipos de bombas Centrifugas.ppt
Transcript of Tipos de bombas Centrifugas.ppt
What is a centrifugal pump?
Three basic components:
Volute, casing, body– or Diffuser
Impeller– or impellers
Driver (motor)
Centrifugal Pumps
Pump Impeller
Vanes
Direction ofrotation
Centrifugal Pumps
Typical single suction impeller
Centrifugal Pumps
Single suction impeller
Centrifugal Pumps
Impeller Types
•Open•Semi-open•Closed
- Single suction- Double suction
•Non-clogging•Axial flow•Mixed flow
Centrifugal Pumps
Full Diameter Impeller
Rotation
Impeller
Blades
Vt
V
r
Vs
Vr = Radial Velocity
Vt = Tangential Velocity
Vs = Vector Sum Velocity
Centrifugal Pumps
Impeller and volute
Suction Eye
Cutwater
Arrows represent thedirection of water flow Discharge
Nozzle
Centrifugal Pumps
End Suction Pump
Series 1510Series 1510
• 26 sizes– To 4400 gpm– To 520 ft TDH– To 150 HP To 8”x10”– General Purpose
Motor
Centrifugal Pumps
Section View
Bell & GossettSeries 1510
Standard Construction
Bell & GossettSeries 1510
Standard ConstructionGaugeTaps
GaugeTaps
Centrifugal Pumps
Close-Coupled PumpClose-Coupled Pump
Series 1531 PumpSeries 1531 Pump
– 20 sizes– To 2600 gpm– To 520 ft TDH– To 60 HP– To 6”x8”– Special Purpose
Motor
Centrifugal Pumps
Large, Line Mounted Pump
Series 80Series 80
– Close coupled– 18 sizes– To 2600 gpm– To 410 ft TDH– To 60 HP– To 8”x8”– Special Purpose
Motor
Centrifugal Pumps
Multi-stage pumps
Bell & GossettSeries 3550
Bell & GossettSeries 3550
•Multi-stage, diffuser design•8 sizes, stainless steel•to 600 gpm•to 1200 ft•to 75 hp, 3500 rpm•many options for suction and discharge nozzles
Centrifugal Pumps
Multi-stage pump
Bell & GossettSeries 3550
Bell & GossettSeries 3550
“Diffusers”
Centrifugal Pumps
Vertical Turbine• Submersible
– 48 Models– 5 - 14 bowls– 40 - 2000 gpm– 25 - 300 feet head
• Lineshaft– 88 Models– 5-20” bowls– 4 Styles– 20 - 10,000 gpm– 7 - 200 feet head
Centrifugal Pumps
Double Suction Pump
Bell & GossettSeries HSC
Bell & GossettSeries HSC
– 37 sizes– To 12500 gpm– To 840 ft TDH– To 1000 HP– To 14”x18”– General Purpose Motor
Centrifugal Pumps
Typical Split Case Pump- Section ViewTypical Split Case Pump- Section View
Centrifugal Pumps
Double Suction Pump
Series VSCSSeries VSCS
Series VSCSeries VSC
– 17 sizes– To 8000 gpm– To 400 ft TDH– To 600 HP– To 12”x14”– General Purpose Motor
Centrifugal Pumps
VSC Pump- Section ViewVSC Pump- Section View
Centrifugal Pumps
Pump Construction
Standard construction, any impeller– Mechanical seal– Internally flushed, seal cavity– Variety of seal materials
Stuffing box construction, any impeller– External flush lines– Compression packing rings– Single flushed mechanical seal
Centrifugal Pumps
Standard construction
Bell & GossettSeries 1510
StandardConstruction
Bell & GossettSeries 1510
StandardConstruction
Centrifugal Pumps
Seals
Shaft
ProcessFluid
Leakage
Environment VesselWall
Centrifugal Pumps
B&G Pump Construction
Standard construction, any impeller– Mechanical seal– Internally flushed, seal cavity– Variety of seal materials
Centrifugal Pumps
Ceramic Seal InsertGraphite Seal RingCompression Ring
Impeller
Retainer (Sec Seal)
Gasket
Mechanical Seal
Rotary Assy
Stationary Assembly
Secondary Seal (Seal Bellows)
Centrifugal Pumps
Seal CavitySeal Cavity
Centrifugal Pumps
Standard construction
Bell & GossettSeries 1510
StandardConstruction
Bell & GossettSeries 1510
StandardConstruction
Centrifugal Pumps
Limits On Seal Performance
Temperature of the flushing water.– 225ºF to 250ºF
System pH.– 7 to 9 for ceramic seals– up to 11 for tungsten carbide seals
Concentration of dissolved solids.– TDS less than 1000 ppm
Concentration of suspended solids.– Less than 20 ppm– Silica, less than 10 ppm
Centrifugal Pumps
Internally Flushed Mechanical Seals
Bell & GossettSeries HSC3
StandardConstruction
Bell & GossettSeries HSC3
StandardConstruction
Centrifugal Pumps
Pump Construction
Stuffing box construction, any impeller– External flush lines
» Internal or External Fluid
– Compression packing rings– Single flushed mechanical seal
Centrifugal Pumps
Packing
Shaft
ProcessFluidLeakag
e
Environment
Vessel Wall
Centrifugal Pumps
Stuffing box with packing
Centrifugal Pumps
Packing Installation
Centrifugal Pumps
Bypass Flush Line
Bell & GossettSeries HSC-S
Bell & GossettSeries HSC-S
Centrifugal Pumps
Liquid-Abrasives Separator
Centrifugal Pumps
What’s “suitable”…?
Impeller– Single suction or double suction.
Volutes– Base mounted or in-line.
Internally flushed or stuffing box.
Single stage or multi stage. Packing, seal or wet rotor.
Centrifugal Pumps
Angular Misalignment
Centrifugal Pumps
Parallel or Offset Misalignment
Centrifugal Pumps
Suction Piping Detail
5 dia.
1. Pipe supported2. Length of
suction piping allows even impeller loading
RIGHT WRONG
1. Pipe weight hangs on pump flange.
2. Short suction pipe results in uneven impeller loading.
Centrifugal Pumps
Why 5 diameters?
Single SuctionImpeller
Centrifugal Pumps
Installation
Typical installation
Elbow Support(Anchor to Base)
Solid Base Foundation
Flow
Pump Motor Hoist Beam
Trolley with ManualHook-Type Hoist
Triple Duty Valve
Suction Diffuser
Centrifugal Pumps
Vertical Turbine PumpDriverDriver
DischargeHead
DischargeHead
ColumnColumn
BowlAssembly
BowlAssembly
Comments?Questions?
Observations?