High-speed Centrifugal Pump according to API 610

Transcription

1 EGS-L, EGS-W Series High-speed Centrifugal Pump according to API 610 Capacity: 2~90 m 3 /h (50Hz) 2.4~108 m 3 /h (60Hz) Head: up to 1500 m (50Hz) up to 2160 m (60Hz) Pressure: EGS-L: up to 15 MPa, EGS-W: up to 25 MPa. Temperature: EGS-L: -130~+260 o C, EGS-W: -130~+340 o C, Application: For handling various clean or corrosive, viscosities less than 500 cp, containing some solid particles liquids. Mainly applied in petrochemical, chemical, energy, metallurgy, paper, pharmaceutical, food, environmental protection industry and so on.

2 1 General EGS series of pumps can be used to handle various clean or corrosive, viscosities less than 500 cp, containing some solid particles liquids. They are applied to substitute the reciprocating pumps and multistage centrifugal pumps in the filed of low flow high head. They are widely applied in petrochemical, chemical, energy, metallurgy, paper, pharmaceutical, food, environmental protection industry and so on. EGS pumps have the following advantages High efficiency EGS pumps adopt gears to increase pump speed greatly, the pump s specific speed is increased. With single stage design, the mechanical energy loss and volume loss are less than multistage pumps. Thus EGS pumps still have high efficiency at low flow high head. High reliability Simplified construction, small axial dimensional, easy ensured shaft s strength and stiffness, smooth speed increase system and good lubricating system lead to pumps high reliability. Simple construction, installation and maintenance convenient Compact design, less space occupied and high interchangeability facilitate maintenance, conveniently than multistage. EGS pumps are mainly divided into two parts Gear box Gear box is the key parts for the smooth running of high speed pumps. Gears and shafts are made of high strength alloy steel. High speed sliding bearings are made of lead bronze alloy, their linear velocities are up to 20m/s. Pump end Pump end includes inducer, impeller, diffuser, casing and casing cover. By the various combinations of inducer and impeller, good suction performance is obtained to decrease the pump s required NPSH. Impeller is normally open or semi-open with straight-blades. Thus high head acquired and impellers are easy to be forged in order to increase impeller s strength. With balance holes on open or semi-open impeller, the axial thrusts are small. Pump casing are mostly circular type not producing radial force. Furthermore, the clearances limit between impeller and diffuser/casing cover of EGS pumps are not strict as normal centrifugal pumps. The clearances between 0.8mm and 3.5mm are all allowed.

3 2 Designation EGS- L 2-25/630 Head Capacity Speed increase gears configuration Pump mount type (L: vertical, W: horizontal) Pump series code Remark: L1: Vertical mounted, one-stage speed increase, maximum power is 37 kw. L2: Vertical mounted, two-stage speed increase, maximum power is 160 kw. W1: Horizontal mounted, one-stage speed increase, gear box is closed coupled with motor, maximum power is 22 kw. W2: Horizontal mounted, one-stage speed increase, maximum power is 37 kw. W3: Horizontal mounted, two-stage speed increase, maximum power is 160 kw. W4: Horizontal mounted, one-stage speed increase, maximum power is 315kW

4 5 Cross sectional drawing (EGS-W1) 1 Motor 2 Reinforced seal 3 Ball bearing 4 Gear box 5 High-speed shaft 6 Vent filter 7 Ball bearing 8 seal chamber 9 Press plate 10 Casing 11 Impeller 12 Flange assemby 13 Seal assembly 14 Shaft sleeve 15 Deflector 16 Oil hood 17 Low-speed gear 18 Oil sight window 19 Oil hood gasket 20 Base plate

5 3 Cross sectional drawing (EGS-L1) 1 Casing 6 Gear box bottom half case 11 Top half case 16 Position pin 21 Seal chamber 2 Casing cover 7 Build-in cycloid gear oil pump 12 Reinforced seal 17 High-speed shaft 22 Impeller 3 Mechanical seal 8 Rolling bearing 13 Low-speed shaft 18 Thrust plate 23Inducer 4 Throttle bushing 9 Low-speed gear 14 Vent plug 19 Mechanical seal 24Welding plate 5 Oil cleaner 10 Pressure gauge 15 Sliding bearing 20 Shaft sleeve

6 4 Cross sectional drawing (EGS-L2) 1 Inducer 8 Gear box mid gear 15 Low-speed shaft 22 High-speed shaft 29 Shaft sleeve 2 Casing 9 Oil cleaner 16 Gear box top half case 23 High-speed gear 30 Mechanical seal 3 Diffuser 10 Oil cleaner seat 17 Rolling bearing 24 Sliding bearing 31 Impeller 4 Diffuser cover 11Mid box 18 Low-speed gear 25 Mechanical seal 32 Welding plate 5 Casing cover 12 Mid gear 19 Build-in cycloid gear oil pump 26 Temperature gauge 6 Gear box bottom half case 13 Pressure gauge 20 Lubricant suction tube 27 Mechanical seal 7 Mid shaft 14 Rolling bearing 21 Sliding bearing 28 Shaft sleeve

7 6 Cross sectional drawing (EGS-W2) 1.Low-speed shaft 7.Vent plug 13.Inducer 19 Thrust sliding bearing 25 Bolt 2.Deflector 8.Gear box 14 Radial liding bearing 20 Radial sliding bearing 26 Support foot 3.Bearing cover 9.Casing 15 Thrust sliding bearing 21.Mechanical seal 4.Gear box cover 10 Wear plate 16.Thrust plate 22.Shaft sleeve 5 Rolling bearing 11.Impeller 17.High-speed gear 23.Mechanical seal 6.Low-speed gear 12.Casing cover 18.High-speed shaft 24 Lock washer

8 7 Cross sectional drawing (EGS-W3) 1.Casing 7.Gear box 13 Gear box cover 19 Radial sliding bearing 25 Radial liding bearing 2.Diffuser 8.Vent plug 14 Bearing cover 20 Thrust sliding bearing 26 Low-speed gear 3.Inducer 9.Mid gear 15 Support foot 21.High-speed shaft 27 Low-speed shaft 4.Impeller 10 Mid shaft 16 Bolt 22.High-speed gear 28 Rolling bearing 5.Diffuser cover 11.Mid box 17.Mechanical seal 23.Thrust plate 6.Casing cover 12.Mid gear 18.Shaft sleeve 24 Thrust sliding bearing

9 8 Shaft sealing Seal chamber can accommodate three types of mechanical seals. Together with auxiliary system, various conditions can be meet. Single seal Double seal Impeller 2 Rotary ring 3 Shaft sleeve 4 Throttle bushing assembly 5 Static ring assembly 6 Screw bolt 7 Static ring assembly 8 O-ring 9 Deflector 10 Rotary ring 1 Impeller 2 Shaft sleeve 3 Rotary ring 4 Static ring assembly 5 Static ring assembly 6 screw bolt 7 Static ring assembly 8 O-ring 9 Shaft sleeve 10 Rotary ring Tandem seal Impeller 2 Rotary ring 3 Shaft sleeve 4 Rotary ring 5 Static ring assembly 6 Screw bolt 7 Static ring assembly 8 O-ring 9 Shaft sleeve 10 Static ring assembly 11 Rotary ring

10 9 Performance coverage (EGS-L1/L2) I

11 10 Performance coverage (EGS-W1/W2/W3)