KQSN-L Vertical Double Suction Pump
Ingenuity, intentionally at every part of the component, attentive to each processing process, control each production link with the most advanced testing equipment and the most scientific detection method. Kaiquan’s latest KQSN/L series vertical dual-suction pump has launched two support structures based on market demand and product structure stability, and thoroughly solves problems such as difficulty in disassembly and maintenance of existing market products, high machine seal failure, and large operating vibration. This series of products are widely used in tap water plants, pumping stations, air-conditioning circulating water, heating water circulation, industrial system water supply system, fire system and other industries.
KQSN-L Vertical Double Suction Pump
Reliable structure: The low-voltage motor pump (200kW motor power division) launched two bracket structures, which is reliable to run
The smallest area: The structure is compact, narrowing the area of pump rooms, saving infrastructure investment
Best performance: Excellent hydraulic model matching fine casting mold casting process, ensuring high efficiency and low air erosion
Reliable operation: Increase the design of the water-shaking cover to cover the lower bearings of the rotor to prevent water from penetrating into the bearings
Convenient for disassembly installation: Convenient disassembly of container mechanical sealing
Intelligent detection: Intelligent detection of pressure, flow, temperature and vibration, etc., realize intelligent early warning and dispatch
- Main Parts Materials
- Pump Factory Acceptance Standards
- Model Description
- Column Structure
- Bracket Type Structure
- Mechanical Analysis and Calculation
| serial number | part | Material | Brand number |
| 1 | Pump body, pump cover | Ductile iron/grey cast iron/stainless steel | QT500-7/HT250/304 |
| 2 | impeller | stainless steel | 20Cr13/304 |
| 3 | sealing ring | Cast Iron/Copper Alloy | HT250/QT40018/ZCuSn10Zn2
|
| 4 | Spindle | Alloy structural steel/stainless steel | 40Cr/20Cr13 |
| 5 | Shaft sleeve | stainless steel | 304/20Cr13 |
| 6 | Coupler | Pin coupling |
| serial number | Standard number | standard name |
| 1 | GB/T 13006-2013 | Centrifugal pumps, mixed flow pumps and axial flow pumps NPSH |
| 2 | GB/T 13007-2011 | Centrifugal pump efficiency |
| 3 | JB/T 8097-1999 | Pump vibration measurement and evaluation methods |
| 4 | JB/T 8098-1999 | Pump noise measurement and evaluation methods |
| 5 | GB/T 3216-2016 | Rotary Power Pumps, Hydraulic Performance Acceptance Test Level 1, 2 and 3 |
The motor base and the motor have a clearance fit to quickly adjust the motor alignment; the motor, motor base, and water pump are connected to the base through tightening bolts. The suction port and the discharge port are both on the pump body on one side of the axis of the water pump, perpendicular to the axis and in a horizontal direction. Cooperate with support columns to meet the support strength while reducing the floor space.
- Motor bracket 2. Support column 3. Shaft 4. Bearing parts 5. Pump cover 6. Shaft sleeve 7. Impeller 8. Pump body 9. Shaft seal 10. Waterproof sleeve 11. Base
- motor 2.Motor base 3.Tighten the bolts 4.KQSN/L vertical double suction pump 5.Pin coupling 6. support column 7. base
The water pump and motor are independently supported and fixed. The specially designed high-voltage motor support structure can effectively transfer the load to the foundation, ensuring the stability of the motor and reducing water pump failure.
- Motor bracket 2. Shaft 3. Bearing components 4. Pump cover 5. Shaft sleeve 6. Impeller 7. Pump body 8. Shaft seal 9. Waterproof sleeve 10. Base
1.6KV/10kV high voltage motor 2.Pin coupling 3.Pump foot pull plate and tightening bolts 4.KQSN/L vertical double suction pump 5.Motor base 6.Motor bracket 7.Base
Taking a 10KV, 4-level, 355kW high-voltage motor as an example, mechanical analysis and calculation: the natural frequency of the bracket is 31.342Hz, and the corresponding rotation speed is 1880rpm, which is 1.27 times the working speed of 1480rpm.In actual operation, no resonance phenomenon will occur and the operation requirements are met.
Flow range: 120 ～ 2500m3/h
Rap the range: 7 ～ 146m
Turn speed: column -type structure 990/1480/2960rpm, bracket structure 990/1480rpm
Voltage: column -type structure 380V, bracket structure 6kV/10KV
Electric power: column structure ≤200kW, bracket structure> 200kW
Specifications: 26 models (5 of which), 219 specifications (35 of which) (see the attached table for details)
Pump import diameter range: DN150 ~ 500mm
The temperature standard of the medium is 0 ℃ ～ 80 ℃; water or physical and chemical properties are similar to other media of water and are suitable for medium containing small solid particles.
This series of vertical double-suction pumps has undergone detailed structural adjustments and improvements. Compared with products of the same structure on the market, they have the following advantages:
- Two bracket structures are introduced for low- and high-voltage motor pumps (200kW motor power is the dividing line), which are combined with strength analysis, reliability estimation and three-dimensional design to achieve stable and reliable units;
- The excellent hydraulic model matches the precision mold casting process to ensure high product efficiency and low cavitation;
- The containerized mechanical seal is easy to disassemble;
- The structure is compact, the area of the pump room is reduced, and infrastructure investment is saved.
- The enlarged design of the water rejection sleeve perfectly covers the lower bearing body of the rotor, and the joint between the lower bearing gland and the bearing body and the bolt hole are coated with sealant to effectively prevent water from penetrating into the bearing.
- Intelligent detection of pressure, flow, temperature and vibration, etc.; to evaluate and diagnose the condition of the pump shaft, bearings and seals, and effectively realize intelligent early warning, intelligent dispatching and disposal.