Municipal water supply and drainage vertical long shaft pump
LC municipal water supply and drainage vertical long-axis pump is an advanced and mature series of products developed to meet the needs of the domestic market by absorbing the advanced design and manufacturing experience of vertical long-axis pumps at home and abroad. This product can be used to transport liquids such as clean water below 55°C, rainwater, iron oxide water, sewage, corrosive industrial wastewater, seawater, etc.; after special design, it can transport liquids at 90°C. It is widely used in water companies, sewage treatment plants, power plants, steel plants, mines and other industrial and mining enterprises, as well as municipal water supply and drainage, farmland irrigation, flood control and drainage projects.
● Model implication
200LC-23A×2-LH
200—The water pump outlet diameter is φ200mm;
LC—vertical long shaft pump;
23—When the impeller is not cut, the single-stage design point head of the pump is 23m (total head of the pump = single-stage head × number of impeller stages);
A—impeller outer diameter cutting code;
×2—The impeller stage number is 2 (omitted when the stage number is 1);
L—submerged depth (L≤40m, in m);
H—Water pump with protective tube (omitted if without protective tube).
Note: The model format of 100 caliber and 150 caliber is 100LC50-20A×2-L, 150LC140-15A×2-L, where 50 and 140 represent the design point flow of the pump. The model format of vertical long-axis pumps with 200 caliber to 1000 caliber does not include flow parameters.
● Performance range
Flow rate: 50~8400m3/h;
Lift: 15~150m.
● Structural features and working principle
The suction port of LC type municipal water supply and drainage vertical long-axis pump is vertically downward, the outlet is horizontal, vacuum-free startup is required, single foundation installation, the water pump and motor are directly connected, and the foundation occupies a small area; looking down from the motor end, the water pump rotor component rotates counterclockwise, and the main features are:
1. The hydraulic design software is used to optimize the design, with superior performance, and full consideration is given to the anti-abrasion performance of the impeller and guide vane body, which greatly increases the life of the impeller, guide vane body and other parts; the product runs smoothly, safely and reliably, and is highly efficient and energy-saving.
2. The inlet of LC type energy-saving vertical long-axis pump is equipped with a filter screen with appropriate hole size, which can effectively prevent large particles of impurities from entering the pump and damaging the pump, while minimizing the inlet loss and improving the efficiency of the pump.
3. The impeller of LC type energy-saving vertical long-axis pump adopts balance hole to balance the axial force. The front and rear covers of the impeller are equipped with replaceable sealing rings to protect the impeller and guide vane body.
4. The rotor components of LC type energy-saving vertical long-axis pump include impeller, impeller shaft, intermediate shaft, upper shaft, coupling, adjusting nut and other parts.
5. The intermediate shaft, water pipe and protective pipe of LC type energy-saving vertical long shaft pump are multi-section, and the shaft is connected by threaded coupling or sleeve coupling; the number of water pipes can be increased or decreased according to user needs to adapt to different underwater depths. The impeller and guide vane body can be single-stage or multi-stage to adapt to different lift requirements.
6. The length of a single shaft is reasonable and the rigidity is sufficient.
7. The water pipe of LC type energy-saving vertical long-axis pump is connected by flange, and there is a guide bearing body between two adjacent sections of water pipe. Guide bearings are installed on the guide bearing body and the guide vane body. The guide bearings are made of polytetrafluoroethylene, ceron or nitrile rubber. The protective tube is used to protect the shaft and guide bearing. When conveying clean water, the protective tube can be cancelled, and the guide bearing does not need to be connected to external cooling and lubricating water; when conveying sewage, the protective tube must be installed, and the guide bearing must be connected to external cooling and lubricating water (the water pump is equipped with a self-closing sealing system. After the water pump is stopped, the self-closing sealing system can prevent sewage from entering the guide bearing).
8. The residual axial force and weight of the rotor components of the LC type energy-saving vertical long-axis pump can be borne by the thrust bearing in the motor support or by the motor with thrust bearing. The thrust bearing is lubricated with grease (also known as dry oil lubrication) or lubricating oil (also known as thin oil lubrication).
9. The shaft seal of LC type energy-saving vertical long shaft pump is a packing seal, and the shaft seal and guide bearing are equipped with replaceable sleeves to protect the shaft. The axial position of the impeller is adjusted by the upper end of the thrust bearing component or the adjusting nut in the pump coupling, which is very convenient.
10. LC type energy-saving vertical long-axis pumps with outlet diameters of φ100 and φ150 are only used to transport clean water at room temperature, without protective tubes, and the guide bearings do not require external lubrication with lubricating water; if the user requires φ100 and φ150 caliber vertical long-axis pumps with protective tubes, our company can provide additional technical solutions.
●Selection instructions :
1. The performance of LC vertical long-axis pumps can be found in the performance parameter table. The parameters listed in the table are the test performance of clean water at room temperature without water pipes and filters under one atmosphere; when calculating the head of the device, the loss of water pipes and filters is estimated as 1m per 5m.
2. The motor is configured according to γ≤1100kg/M 3. YLS is a 6kV motor, and a 10kV motor can be equipped as needed.
3. When ordering, please indicate the pump model, performance parameters, liquid type (see "Main Parts Material Table"), material of main parts, submerged depth L, whether it has a protective tube, etc.; when transporting sewage, the maximum size of sewage particles and sewage specific gravity must also be provided.
4. If the temperature of the conveyed liquid is greater than 55°C, it must be indicated.
●Part material list :
| | Shimizu | Sewage | seawater |
| Ⅰ | Ⅱ | III | IV |
| Bell mouth | HT200 | HT200 or QT400-18 | HT200Ni2Cr | 321 or 316L stainless steel |
| impeller | HT200 | QT400-18 or cast steel or ZG1Cr13Ni1 | ZG1Cr18Ni9Ti | ZCuZn16Si4 or 316L stainless steel |
| Sealing ring☆ | HT200 | QT400-18 or 2Cr13 | HT200Ni2Cr | ZCuZn16Si4 or 316L stainless steel |
| Guide vane | HT200 | QT400-18 or cast steel | HT200Ni2Cr | ZG00Cr17Ni14Mo2 |
| Water pipe, protective pipe | Q235-A | Q235-A | 1Cr18Ni9Ti | 00Cr17Ni14Mo2 |
| axis | 45 or 2Cr13 | 45 or 2Cr13 | 1Cr18Ni9Ti | 00Cr17Ni14Mo2 |
| Bushing☆ | 2Cr13 | 2Cr13 | 1Cr17Ni2 | 1Cr17Ni2 |
| Guide bearing☆ | PTFE/Sialon/Nitrile rubber |
| Guide bearing body | HT200 | HT200 or QT400-18 | HT200Ni2Cr | ZG00Cr17Ni14Mo2 |
| Threaded and sleeve couplings | 45 or 2Cr13 | 40Cr or 2Cr13 | 1Cr17Ni2 | 1Cr17Ni2 |
| Outlet elbow | Q235-A | Q235-A | 1Cr18Ni9Ti | 00Cr17Ni14Mo2 |
| Motor support | Q235-A | Q235-A | Q235-A | Q235-A |
Note: The material can be selected according to user requirements, and the parts marked with ☆ are wearing parts.
Vertical long shaft pump production site album:
