What are the characteristics of single stage double suction centrifugal pumps

Split box pump (split circulation) is also known as single-stage double-suction centrifugal pump, and its main feature is the large flow rate of the conveying medium. The working principle of the operation of the split case pump: The impeller is installed in the pump casing and fastened to the pump shaft, which is directly driven by the motor.

The pump casing** has a liquid suction connected to the suction pipe. The liquid enters the pump through the foot valve and suction pipe. The liquid discharge port on the pump casing is connected to the discharge pipe.

When the speed of the pump is constant, its pressure head and flow rate are related to the diameter of the impeller. It is widely used in petroleum, chemical industry, electric power metallurgy, mining, ship selection, light industry, agriculture, civil and national defense departments, and occupies an important position in the national economy. Changsha Zhonglian Pump Industry has more than 30 years of experience in the production of Zhongkai pumps, and we have 10,000+ cooperation units, and the selection of **...

Advantages and characteristics of single-stage double-suction centrifugal pump.

1. Compact structure, beautiful appearance, good stability, easy to install.

2. The double-suction impeller with stable operation and optimized design reduces the axial force to a minimum, and has excellent hydraulic performance, and the inner surface of the pump casing and the surface of the impeller of the centrifugal pump have anti-cavitation performance.

3. SKF and NSK bearings are selected to ensure stable operation, low noise and long service life.

4. The shaft seal is a mechanical seal or a packing seal. It can guarantee 8000 hours of operation without leakage.

5. The centrifugal pump does not need to be adjusted when it is installed and assembled, and it can be used according to the on-site conditions. Discrete or horizontal installation.

6. The installation of self-priming device can realize automatic water absorption, that is, there is no need to install a foot valve, no vacuum pump, no need to backfill, and the centrifugal pump can be started.

1. Double suction type large flow.

2. High efficiency, the average efficiency is more than 80%.

3. Easy maintenance.

4. Open in the middle.

Single-stage, single-suction centrifugal pumps are a common type of centrifugal pump that is mainly used to convey a variety of liquids. Its structural characteristics are as follows:

Single-stage: There is only one impeller in the pump, and the liquid is discharged from the pump outlet after a working stage. Single-stage, single-suction centrifugal pumps are suitable for applications with low to medium heads.

Single suction: The liquid enters the impeller from only one side of the pump. This design can result in higher axial thrust and increased bearing wear and vibration. However, with relatively small flow and head requirements, single-suction centrifugal pumps are more cost-effective.

Compact: Single-stage, single-suction centrifugal pumps typically have a compact end suction, where liquid enters from one end of the pump and discharges from the other. This structure is space-saving and easy to install.

Shaft seals: Single-stage, single-suction centrifugal pumps are usually sealed with mechanical seals or soft packing seals to prevent liquid leakage in the pump. The mechanical seal has better performance, but the cost is higher; Soft packing seals are less costly, but there may be some leakage.

Bearings and lubrication: The bearings of single-stage, single-suction centrifugal pumps are usually mounted on a bracket between the pump body and the motor. Bearings can be rolling bearings or plain bearings, and the lubrication method can be oil lubrication or grease lubrication.

Drive mode: Single-stage single-suction centrifugal pump is usually driven by an electric motor, but other drive methods such as diesel engine and steam turbine can also be used. The motor is directly connected to the pump through a coupling, or it can be connected by indirect transmission methods such as belt drive or gear drive.

In short, the single-stage single-suction centrifugal pump has the characteristics of simple structure, compactness, easy installation and high cost-effectiveness. It is suitable for a variety of applications with relatively low flow and head, such as water supply and drainage, water supply, air conditioning systems, etc.

1.The single-stage single-suction centrifugal pump is a vertical structure, with the same inlet and outlet diameters, and is located on a center line, which can be installed in any position of the pipe hidden branch cherry road like a valve, with compact and beautiful appearance, small footprint and convenient decoration.

2.The impeller is mounted directly on the elongated shaft of the motor, axial.

The size is short, the structure is compact, the pump and the motor stove bush bearing configuration is reasonable, and the radial and axial load can be effectively balanced, so as to ensure the balance of the pump's operation, low vibration and low noise.

3.The single-stage, single-suction centrifugal pump uses high-quality mechanical seals.

The operating life is more than 5000 hours.

Simple structure, reliable performance, small size, light weight, good anti-cavitation performance, low power consumption, easy to use and maintain.

The models of single-stage single-suction pipeline centrifugal pumps are mainly divided into type A and type B. The following missing numbers are their details:

Type A single-stage single-suction pipeline centrifugal pump. This pump is a single-stage single-suction vertical centrifugal pump, its flow range is the head range is the range of the medium temperature is within 80. It is mainly used to convey clear water that does not contain solid particles or liquids with physical and chemical properties similar to clean water.

It is widely used in industrial and urban water supply and drainage, pressurized water delivery for high-rise buildings, garden sprinkler irrigation, fire pressurization, long-distance transportation, HVAC circulation, bathrooms and other empty state offices.

Type B single-stage single-suction pipeline centrifugal pump. This pump is also a single-stage single-suction vertical centrifugal pump, its flow range is 8 155m, and the medium temperature is within 100. It is mainly used to convey clear water that does not contain solid particles or liquids with physical and chemical properties similar to clean water.

Compared with the A-type pump, the B-type pump has a smaller volume and higher bucket head, and is widely used in papermaking, textile, printing and dyeing, chemical, chemical fiber and other industries.

Please note that the above is only part of the model information for single-stage, single-suction line centrifugal pumps. If necessary, you can consult a professional for more detailed information.

Taken literally, a double-suction pump is fed water from both ends of the impeller, while a single-suction pump is fed from one end of the impeller.

The double-suction type is mainly used in the process with large flow rate and low head. When the flow rate of the pump is greater than or equal to 280m3 h, the diameter reaches 200mm or more, and if the single suction pump is used, the speed is required to be about 1450rpm to meet the suction requirements. However, if a double-suction pump is used, the size and weight of the pump are reduced, and the speed can be increased, the volumetric efficiency can be increased, and the reliability of the equipment can be improved.

Single-suction pumps, which can also be called end-suction pumps, have a relatively small flow rate of single-suction pumps. With the same flow rate, the volume of single suction is small, but the axial force is large, and the bearing burden is large. The cost of single-suction pump is low, more reasonable, and widely used, but in many ways it is still inferior to double-suction pump.

If the inlet pressure is high, it can be solved by using double suction wheels. Because the axial force balance of the impeller of the single-suction pump is a big problem.

The purpose of using eccentric reducer at the inlet of single-stage double-suction split centrifugal pump is: to reduce or avoid air entering the pump with the inlet pipe.

In order to obtain less hydraulic loss and better inlet conditions, the inlet pipe of the general pump is larger than the inlet of the pump, so that there must be a process of changing the diameter when connecting. The general pipeline uses concentric cone pipe reducer, but at this time, it is not suitable to use concentric cone pipe reducer. Because of the use of concentric cone tube reducing, air accumulation is easy to occur in the upper part of the concentric cone tube, and the air accumulated in this part will cause cavitation phenomenon when it enters the pump, which is very unfavorable to the operation of the pump.

This phenomenon can be avoided by using an eccentric cone tube reducer (commonly known as an eccentric reducer).

Not only the single-stage double-suction split centrifugal pump adopts eccentric reducer, but other pumps also use eccentric reducer, because the air intake in the pump will produce cavitation that is not conducive to the operation of the pump. When the eccentric reducer is installed, it is generally installed in the way of upper flat (flush at the top).

The inlet line is generally larger than the inlet of the pump, which is to reduce hydraulic losses. The eccentric reducer is mainly for the convenience of fixing the inlet pipeline, and there are also concentric reducers.

The inlet is a large head, and the outlet is a small head to reduce the resistance of the liquid.

Single-stage double-suction centrifugal pump H = m, Q = caliber.

Hello, q = caliber, h = m, then you can find: 1The speed of this centrifugal pump is like min

n=3600(h*q) Hydraulic efficiency: =h*q n*p= total loss: h=p*q n= suction pressure:

p1=h+h= discharge pressure: p2=h=