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SBHL (C) series circulating water pump

key word:Heat exchange element

Category:


Product description

SBHL (c) series circulating water pump

 

1. Introduction

1.1. Application

SBHL (C) series circulating water pump is suitable for power plant circulating water and other occasions. It has the characteristics of high efficiency, good cavitation performance, small occupied area and convenient installation and use.

1.2. Model meaning

**SBHL-(C)-##-&&-@@

**---Nominal inner diameter of outlet pipe (mm)

SBHL --- vertical mixed flow pump

(C) --- core pulling structure (without core pulling, no marking)

##---------------Design flow (m3/h)

&&-------------------Design lift (m)

@@------------------------Impeller cutting marks (A, B and C represent the first, second and third cutting respectively.)

Example: 1400SBHL (C) 3.75-23A means that the nominal inner diameter of the outlet pipe of the pump is 1400mm, the pump is of core pulling structure design, the design flow rate of the pump is 3.75m3/s, the design head of the pump is 23m, and the impeller is cut for the first time.

1.3. Structural features

The inlet part of the vertical core pulling mixed flow pump in SBHL (C) lane is a suction horn or an inlet elbow, and the outlet pipe can be arbitrarily selected above or below the foundation. The pump adopts imported wear-resistant ceramic bearing or Sialon guide bearing. The pump can be drawn out in any form, that is, the pump rotor can be core pulling or non core pulling.

1.3.1. Structural form:

1.3.1.1. Core pulling form.

Core pulling design: after the pump cover on the top of the pump is removed, the core pulling part of the pump, including the whole pump shaft, water lubricated bearing, impeller, impeller chamber, guide vane and inner pipe, can be drawn out, while the whole pump outer cylinder connected with the water outlet pipeline is still fixed on the pump foundation.

Non core pulling design: pump rotor and non rotor parts are assembled into one. When checking the internal parts of the pump, the pump should be lifted out and disassembled.

1.3.1.2. Installation form

"CD" installation form: the outlet elbow is arranged under the foundation floor. Foundation slab support above pump outlet elbow. The driving motor is connected with the pump flange through the motor base.

"EB" installation form: the outlet elbow is arranged above the foundation floor. The pump is supported on the foundation floor below the outlet elbow. The drive motor base is connected with the pump flange.

"EJ" installation form: the outlet elbow is arranged above the foundation floor. The pump is supported on the foundation floor below the outlet elbow. The drive motor is mounted on a separate foundation slab.

"EM" installation form: the outlet elbow is arranged above the foundation floor. The pump is supported on the foundation floor below the outlet elbow. The drive motor is mounted on the frame. The motor base and pump are respectively placed on a common foundation base.

1.3.1.3. In order to ensure the stable operation of the pump, the inlet flow pattern of the pump is required to be uniform. Therefore, a water inlet cone is arranged under the water inlet horn of the pump.

1.3.1.4. Form of inlet chamber.

Open type (special type): in order to ensure a good inlet flow state, the special civil dimensions of the open inlet chamber are specified.

Open type (conventional type): for water inlet, conventional open type inlet chamber is selected, and there is no special civil dimension for this type of inlet chamber.

Closed type: in order to ensure good inlet flow state, special civil dimensions of closed inlet chamber are specified.

Inlet elbow type: in order to ensure that the inlet water flows to the pump evenly and speedily, the inlet elbow is arranged at the bottom of the pump. The inlet elbow begins with a square cross-section, which decreases uniformly along the flow direction until the filter is tubular.

1.3.1.5. Bearing and lubrication. Wear resistant ceramic bearing can be selected as the radial support of the shaft. At this time, the pump does not have medium self-lubricating; in addition, it can also choose the thordon or rubber bearing. The pump shaft is protected by a protective sleeve, and the bearing is lubricated by external clean pressure water. If the medium to be transported is clear water, self-lubricating form can be adopted for selon or rubber bearing without setting shaft sleeve. Optional, axial force in the pump or bearing.

1.3.1.6. Shaft seal form. The shaft seal is soft packing (non asbestos), and the outer shaft sleeve of the shaft seal can be replaced.

1.3.1.7. Coupling type. The upper shaft and the lower shaft are connected by a rigid coupling. The pump and motor are connected by adjustable rigid coupling, and elastic coupling can also be used as required.

1.3.1.8. Outlet direction. The outlet pipe is horizontally arranged above and below the pump foundation. The pump is a vertical single foundation core mixed flow pump, which adopts a horn inlet and a straight pipe outlet. The inlet of the pump is equipped with an inlet cone, which can improve the water inlet flow pattern of the pump.

1.3.2. Description of important parts: important parts are composed of shell (fixed) part, inner shell and rotor (core pulling) part. The shell part is mainly composed of water inlet horn, lower connecting pipe, intermediate connecting pipe, upper connecting pipe, outlet elbow, base plate, motor base, etc.; the inner shell part is mainly composed of guide vane body, impeller chamber, lower protective sleeve, upper protection sleeve, bearing bracket a, bearing bracket B, lower section of pump cover, middle section of pump cover, pump cover, etc.; rotor part is mainly composed of impeller, pump shaft, transmission shaft and intermediate coupling It is composed of axial device, pump coupling, motor coupling, shaft sleeve, shaft end nut, impeller nut, adjusting nut, etc.

1.3.2.1. The pump shaft is radially supported by two Sialon bearings respectively installed in the bearing bracket and guide vane. The guide bearing shall be rinsed with external clarified water.

1.3.2.2. In order to facilitate the installation and maintenance, the pump adopts the core pulling structure. The rotor part and the inner shell part of the pump can be drawn out without removing the shell, water outlet pipeline and pumping water into the pool.

1.3.2.3. The lower end of pump shaft is connected with impeller through impeller nut, and pump shaft, transmission shaft and motor shaft are connected by rigid coupling. The pump coupling is equipped with adjusting nut, through which the clearance between impeller and impeller chamber can be adjusted.

1.3.2.4. Vertical direct connected motor is adopted. When the pump is running, all axial force is borne by the motor. Looking down from the motor end, the pump rotor rotates clockwise.

1.3.3. Description of important characteristics:

1.3.3.1. Modular design is adopted, and core pulling structure and non core pulling structure can be formed by hydraulic unit module.

1.3.3.2. The basic hydraulic model in the series is carefully screened and optimized. The pump has high efficiency and good cavitation performance. The application of the design software has strong adaptability. The standard design size DN700-DN2400 can meet the working range Q = 1.5-18m3 / s; the non-standard design Hmax = 50m, Q = 30 m3/s.

1.3.3.3. The inlet passage which has been tested and developed for many years is matched with the pump to provide stable and vortex free inlet flow pattern and low submergence depth.

1.3.3.4. The modularization of pump body structure can form a variety of different installation and layout structures.

1.3.3.5. On the premise of ensuring high performance of the pump, the core pulling component has enough rigidity, and two-point support in the cylinder is a typical static structure design. There is no supporting rib plate between the core pulling part and the outer cylinder, which will not interfere with each other and cause transverse vibration. The installation, disassembly and maintenance of the pump are also very convenient.

1.3.3.6. The unique inlet channel design, the center guide cone of cast welding structure in the inlet channel and the parts of pump integrated design ensure that the pump has good water inlet stability, cavitation performance, and reduces the submergence depth required by the pump.

1.3.3.7. The water lubricated bearing of special rubber has a long service life. There is also RESIDUR ceramic bearing (imported) for users to choose. This kind of bearing does not need cooling and lubricating water system, and can operate safely in medium containing sediment for a long time.

1.3.3.8. The welding structure is adopted, the surface finish of the flow passage parts is high, the friction loss in the pump is reduced, and the maximum lifting capacity of the pump is controlled.

 

2. Main technical parameters and product appearance

2.1. Main technical parameters

2.1.1. Typical technical parameters

Outlet diameter (mm): 500~2200;

Maximum flow (m3/s): 18.62;

Maximum lift (m): 50.96;

Maximum temperature (℃): 40;

Power (kW): 55 ~ 4200;

Speed (r / min): 247, 270, 297, 330, 370, 424, 495, 594, 740, 990.

2.1.2. Technical parameters (see table 17-1).

Table 17-1 technical parameters of SBHL (C) series circulating water pump

Model Flow Head Speed Efficiency Shaft power Matching power NPSH Inlet/outlet  impeller diameter
m3/s m r/min % KW KW m mm
500SBHL(C)
500SBHL(C)
0.95-6.47B
0.752 8.01 594 80 73.818 90 6 580/452
0.95 6.47 87 69.264 4.11
1.147 4.09 80 57.491 5.5
500SBHL(C)
0.95-6.47B
0.72 6.73 80 59.382 75 6.28 560/413
0.89 5.47 86.5 55.177 4.31
1.062 3.65 80 47.504 5.13
500SBHL(C)
0.95-6.47B
0.7 5.44 80 46.667 55 6.27 550/378
0.84 4.42 85.5 42.824 4.54
0.978 3.18 80 38.113 4.8
600SBHL(C)
600SBHL(C)
0.98-11.59A
0.714 14.25 594 80 124.688 160 4.33 659/514
0.98 11.59 87 127.994 3.89
1.229 7.88 80 118.683 7.43
600SBHL(C)
0.98-11.59A
0.677 12.52 80 103.873 132 4.32 635/470
0.93 9.97 86.7 104.848 3.64
1.151 6.79 80 95.776 5.6
600SBHL(C)
0.98-11.59B
0.656 10.4 80 83.608 110 4.17 610/416
0.85 8.45 86.5 81.407 3.45
1.031 5.75 80 72.65 4.03
600SBHL(C)
0.98-11.59C
0.635 8.05 80 62.644 75 4 591/361
0.8 6.7 83.5 62.933 3.3
0.92 5 80 56.373 3.35
600SBHL(C)
1.22-17.98
0.914 21.37 740 80 239.365 315 6.4 659/514
1.22 17.98 87 247.19 5.61
1.555 11.48 80 218.767 11.2
600SBHL(C)
1.22-17.98C
0.868 18.67 80 198.598 250 6.38 635/470
1.18 14.77 86.7 1967.08 5.31
1.457 9.81 80 175.161 8.35
600SBHL(C)
1.22-17.98C
0.842 15.38 80 158.7 200 6.16 610/416
1.08 12.42 86.5 152.03 5.03
1.31 8.17 80 131.161 5.92
600SBHL(C)
1.22-17.98C
0.815 11.8 80 117.855 160 6 591/361
1 9.98 83.5 117.177 4.8
1.178 7.25 80 104.663 4.95
600SBHL(C)
1.01-8.29
0.759 10.29 594 80.5 95.118 110 4.97 625/485
1.01 8.26 87.5 94.012 4.7
1.247 5.38 80.5 81.706 7.31

Note: the maximum diameter of SBHL (C) circulating water pump produced by our company is ∮ 2200mm. Due to the limited space, only the performance parameters of ∮ 500 ~ ∮ 600 caliber are listed.

2.2. Product appearance (see Fig. 17-1 ~ Fig. 17-12)

2.3. Materials of main parts (see table 17-2 and figure 17-13).

Table 17-2 material of main parts

Part No. Part name Material
Clean water Seawater
1 Water inlet horn HT200 HT200-2Ni
2 Impeller ZG1Cr18Ni9Ti ZG1Cr18Ni9Ti, ZG0Cr18Ni12Mo2Ti
3 Impeller chamber ZG1Cr18Ni9Ti ZG1Cr18Ni9Ti, ZG0Cr18Ni12Mo2Ti
4 Guide vane Q235A HT250-2Ni, 1Cr18Ni9Ti
5 Connection pipe Q235A HT250-2Ni, 1Cr18Ni9Ti
6 Protecting sleeve Q235A HT200-2Ni, ZG1Cr18Ni9Ti
7 Pump shaft 45, 35CrMo 35CrMo, 2Cr13, 0Cr18Ni12Mo2Ti
8 Bearing body HT200, ZG230-450 HT200-2Ni, 1Cr18Ni9Ti
9 Transmission shaft 45, 35CrMo 35CrMo, 2Cr13, 0Cr18Ni12Mo2Ti
10 Outlet elbow Q235A HT250-2Ni, 1Cr18Ni9Ti
11 Shaft sleeve 1Cr17Ni2 1Cr17Ni2
12 Stuffing box parts HT200, 1Cr18Ni9 HT200-2Ni, 1Cr18Ni9Ti
13 Middle seat Q235A Q235A
14 Motor base Q235A Q235A
15 Pump cover Q235A 1Cr18Ni9Ti
16 Floor Q235A Q235A
17 Intermediate coupling 45 40 Cr
18 Bearing Wear resistant ceramics,thordon, rubber Wear resistant ceramics,thordon, rubber
19 Bearing sleeve Wear resistant ceramics, 1Cr17Ni2, 2Cr13 Wear resistant ceramics, 1Cr17Ni2, 2Cr13

 

3. Selection method

According to the design requirements, select the type according to the sample.

3.1. Performance parameters

A 4x300mw subcritical double adjustable extraction steam heating condensing steam turbine generator unit of a power plant is in the form of vertical wet well diagonal flow circulating water pump. Each 300MW unit is equipped with two circulating water pumps in parallel operation, one of which is a double speed pump (unless otherwise specified below, the double speed pump is in normal operating speed condition). The model is provided by the manufacturer. The equipment included in the technical specification will be installed in the wet pump pit in the house for pumping circulating water. Urban reclaimed water is used as circulating water.

3.2. Site conditions

Two 300MW steam turbine generator units are equipped with 4 vertical rotors. The blades can be pumped and fixed in the wet pit. The mixed (inclined) flow circulating water pump is adopted. The Seller shall provide advanced technology, reasonable structure, safety, mature and reliable products to ensure reliable operation, high efficiency and energy saving of the whole unit.

3.3. Supply requirements

3.3.1. Water pump (including base and coupling, anchor bolt assembly, inclined pad iron and pump outlet flange).

3.3.2. Water pump bearing lubricating water system and motor cooling water system (including filter, flow switch, pressure gauge, valve and other pipe fittings. If circulating water pressure is required, cooling water booster pump shall be included)

3.3.3. Motor (including bearing temperature measuring element, junction box, speed change-over switch of double speed motor); 2 motors are of constant speed and 2 are of double speed.

3.3.4. Special tools (specific list provided by the seller).

3.3.5. Supply scope of spare parts (supply items and quantity shall be subject to the order contract)

3.3.6. Supply scope of spare parts required for 3-year operation (supply items and quantity shall be in accordance with the order contract). Guide bearing (thordon bearing): 1 set / pump; thrust bearing: 1 set / 2 pumps; shaft sleeve: 1 set / 2 pumps; packing and rubber sealing ring: 1 set / pump

3.3.7. Material requirements (see table 17-3)

Table 17-3 material requirements

Item Material name and code Item Material name and code
Blade, hub and rotor outer ring ZG1Cr18Ni9Ti Fastening bolt ZG1Cr13Ni
Guide vane body HT250 Outlet elbow Q235A
Out cylinder Q235A Floor Q235A
Spindle 45C Water inlet horn HT250
Shaft sleeve ZG1Cr18Ni9Ti Sealing box HT250
Sleeve Q235A Coupling 45C
Bearing thordon (imported) Impeller sealing ring ZG1Cr13NiMo

 

4. Selection examples

4.1. Form

The circulating water pump is a vertical wet well type diagonal flow pump. Each 300MW unit is equipped with two circulating water pumps for parallel operation, one of which is a double speed pump (unless otherwise specified below, the double speed pump is the normal running speed).

4.2. Model

1400HLC5.5-25.7。

4.3. Purpose

The equipment included in this technical specification will be installed in the indoor wet pump pit for pumping circulating water. Urban reclaimed water is used as circulating water

4.4. Main technical parameters

4.4.1. See table 17-4 for main technical parameters of SBHL (C) series circulating water pump under single pump and normal operating speed.

Table 17-4 main technical parameters of SBHL (C) series circulating water pump under normal speed condition

Parameters Winter operating conditions Summer operating conditions
Circulating water inlet temperature(℃) 10 33
Medium density (saturated watert/m3) 1000 1000
Design flow of water pumpm3/s) 6.44 5.47
Design head of water pumpMPa) 0.198 0.257
Efficiency at design operating point% 88.7 89.5
NPSHr(m) 9.8 8.9
Pump shaft powerkW) 1410 1548
Matching motor power (kW) 1800 1800
Motor speedr/min) 495 495

4.4.2. See table 17-5 for the main technical parameters of SBHL (C) series circulating water pump under single pump and low speed operation in winter.

Table 17-5 main technical parameters of SBHL (C) series circulating water pump with single pump and low speed in winter

Items Parameters
Design flow of water pumpm3/s) 5.17
Design head of water pumpMPa) 17.5
Efficiency at design operating point% 88.8
NPSHr(m) 7.2
Pump shaft powerkW) 985
Matching motor power (kW) 1250
Motor speedr/min) 425

4.5. Water pump layout requirements (see table 17-6)

Table 17-6 layout requirements of sbhi. (c) series circulating water pumps

Item Parameter
Minimum allowable water level of water pump (m) -4.24
Center elevation of outlet pipe (m) -1.8
Elevation of bell mouth (m) -6.64
Floor elevation of suction chamber (m) -7.5
Spacing between pumps (m) 4
Width of inlet channel of water pump (m) 3.5
Minimum length of straight section of water pump inlet channel (m) 3.5
Minimum distance between pump center and grid cleaner (m) 11.5

 

5. Scope of supply and general technical specifications

5.1. Scope of supply

5.1.1. Water pump (including base and coupling, anchor bolt assembly, inclined pad iron and pump outlet flange).

5.1.2. Water pump bearing lubricating water system and motor cooling water system (including filter, flow switch, pressure gauge, valve and other pipe fittings; if circulating water pressure is required, cooling water booster pump shall be included).

5.1.3. Motor (including bearing temperature measuring element, junction box, speed change-over switch of two speed motor); two motors are of constant speed and two are of double speed.

5.1.4. Special tools (attached list)

5.1.5. Scope of supply of spare parts (supply items and quantity shall be in accordance with the order contract).

5.1.6. Scope of supply of spare parts required for 3-year operation (supply items and quantity shall be in accordance with the order contract), guide bearing (plug bearing): 1 set / pump, thrust bearing: 1 set / 2 pump, shaft sleeve: 1 set / 2 pump, packing and rubber sealing ring: 1 set / pump.

5.2. General technical specifications

In order to enable the pump to adapt to various operating conditions of the unit, the Seller shall at least comply with the provisions of the following standards (foreign standards, national standards, Ministry / commission / Bureau (industry) standards, procedures and specifications followed by design, manufacturing, inspection and acceptance), and adopt the latest national and industrial standards and specifications, as follows:

GB/T 1220-2007 stainless steel bar

Corrosion resistant steel castings for general purpose (GB/T 2100-2002)

GB/T 3077-1999 alloy structural steel

GB/T 3216-2005 rotary power pumps - hydraulic performance acceptance tests - Grades 1 and 2

GB/T 3323-2005 radiography of metal fusion welded joints

GB/T 5677-2007 radiographic testing of steel castings

GB 7021-1986 terminology of centrifugal pumps

GB 7233-1987 standard for ultrasonic testing and quality rating of steel castings

GB/T 9113 integral steel pipe flange

GB/T 9115 butt welding steel flange

GB/T 9239.1-2006 mechanical vibration - balancing quality requirements for stationary (rigid) rotors - Part 1: specifications and verification of balance tolerances.

GB/T 9239.2-2006 mechanical vibration - balancing quality requirements for stationary (rigid) rotors - Part 2: balancing errors

GB 4708-1988 gray iron castings

JB 4708-2000 welding procedure qualification of steel pressure vessel

JB/T 8097-1999 pump vibration measurement and evaluation method

JB/T 8098-1999 pump noise measurement and evaluation method

GB/T 11352-2009 carbon steel castings for general engineering

JB/T 9218-2007 nondestructive testing and penetrant testing

GB/T 13384-2008 general technical conditions for packaging of mechanical and electrical products

GB 755-2008 rotating electrical machines - Rating and performance

GB/T997-2008 classification of construction type, installation type and junction box position of rotating electrical machines (IM code)

GB/T 1993-1993 cooling methods for rotating electrical machines

GB/T 4942.1-2006 degrees of protection for integral structures of rotating electrical machines (IP code) - Classification

GB/T 13957-2008 basic series technical conditions of large three phase asynchronous motor