Many new and old customers know how to use the pump, but the principle is not necessarily known. Now, we Haitan's technical staff for everyone to answer the basic concepts and classification knowledge of the pump to promote your messenger to better understand our pump products.
Water pump classification introduced:
1) Volumetric pumps use their studio volume changes to transfer energy; volumetric pumps use their studio volume changes to transfer energy, mainly piston pumps, piston pumps, gear pumps, diaphragm pumps, and screw pumps.
2) The vane pump utilizes the interaction between the rotating vane and water to transfer energy. There are centrifugal pumps, axial pumps and mixed-flow pumps. A hydraulic machine that uses power equipment and transmissions or uses natural energy to raise water from a low to a high altitude. Widely used in farmland irrigation, drainage and agriculture, animal husbandry, industrial and mining enterprises, urban water supply, drainage and other aspects. The pumps used in farmland irrigation and drainage, agricultural and animal husbandry production processes are called agricultural water pumps and are one of the main components of farmland irrigation and drainage machinery.
3) The water wheel pump is a combination of a water turbine and a vane pump. The above types of pumps are more representative of the following types.
4) Centrifugal pump Centrifugal pump is the most widely used in farmland irrigation and irrigation and agriculture and animal husbandry water supply. Mostly used for high lift and small flow situations. The single-stage centrifugal pump has a head of 5 to 125 meters, and the discharge flow is uniform, generally 6.3 to 400 meters 3/hour, and the efficiency is about 86 to 94%. Centrifugal pumps are pumps that use the action of centrifugal force to increase the pressure of a water body and cause it to flow. It is composed of pump casing, impeller and shaft. The power machine drives the rotating shaft, which drives the impeller to rotate at a high speed in the pump casing. The water in the pump is forced to rotate with the impeller to generate centrifugal force. Centrifugal force forces the liquid to be thrown from the periphery of the impeller, composing high-speed and high-pressure water flowing through the pump casing to discharge the pump, and a low pressure is formed at the center of the impeller so as to inhale a new flow of water and constitute a continuous flow transport function. The impeller has blades bent in the direction of reverse rotation, and its structure types are closed, semi-closed and open. The agricultural uses mostly closed impellers, and both sides of the blades are closed by disks. The pump body gradually expands into a volute shape in the direction of the outlet pipe.
The single-suction centrifugal pump that draws water from the impeller side suctions the double-suction centrifugal pump from both sides of the impeller. To increase the lift, multiple impellers can be mounted on the same shaft as a multi-stage centrifugal pump. The water discharged from the previous impeller enters the inlet of the latter impeller and is discharged from the latter impeller after being pressurized. Therefore, the more impellers, the higher the pressure. Some centrifugal pumps have a device that can automatically exclude the suction pipe and the air inside the pump body. Before the start, there is no need to irrigate the pump body. It is called a self-priming centrifugal pump, but its efficiency is often lower than that of a general centrifugal pump.
5) Axial flow pump consists of pump housing, impeller and shaft. Also known as propeller pump. There are several propeller blades on the impeller. When the impeller is driven by the power machine to rotate together with the rotating shaft, each blade pushes the water to one end, and at the other end, draws water from the water source so that the water is generated continuously along the direction parallel to the rotation axis. Flow to achieve the purpose of continuously transporting water. The pressure of the water flow is increased by the rotation of the impeller. After the rotating water flow from the impeller passes through the fixed guide vane, the rotating sub-velocity is eliminated, and due to the diffusion action, part of the kinetic energy is converted into pressure energy, and the water flow in the pump casing is pushed up in the axial direction and flows out of the outlet pipe. Axial flow pump is mainly used for low head and large flow rate. Head range is 1-25 meters; flow rate is 2.7-60.0 m3/s and efficiency is 85-90.5%. There are three types of vertical, horizontal and inclined installations, of which vertical axial pumps are used more often (Figure 2). The installation angle of the propeller blades on the hub of the large-scale axial flow pump impeller can be adjusted, or can be adjusted with time during the operation by the hydraulic drive shaft to adapt to the requirements of the head and flow changes, and to obtain higher productivity, so that the adjustable shaft is called Flow pump.
6) Submersible electric pump The pump impeller and the motor driving the impeller are all submersible pumps. There are two types of deep well and work surface. The deep well submersible pump supplies power to the motor through a cable that extends into the well, eliminating the need for a long axis of the drive. Therefore, the structure is compact, light in weight, and easy to install, use, and transfer. There is a tendency to replace long-axis deep-well pumps in areas where power is available, but It is not applicable to wells with large sediment content and non-powered areas. The electric motors for submersible pumps are dry type (all motor seals), semi-dry type (motor stator seal, and rotor in water), oil-filled (motor filled with oil to infiltrate windings) and wet (inside motor) Filled with water, the stator and rotor are all running in water) and other types. The first three kinds of seals all need to be sealed and require high precision in manufacturing and installation. As a result, submersible pumps for agricultural deep wells usually use wet motors. Their stator windings use water-resistant insulated conductors or cast synthetic resin at the ends of the stator windings and grooves, and the water enters the motor interior. Not much, the sealing structure can be greatly simplified and only sand control is required. Some deep-well submersible pumps have a head of up to 1400 meters and a maximum flow rate of 1.4 meters 3/second.
7) The specific use of the pump:
Pumps have different uses, different transport liquid media, different flow, head range, therefore, of course, its structure is not the same, the material is also different, summed up, can be roughly divided into:
1. Urban water supply 2, Sewage system 3, Civil engineering, Building system 4, Agricultural water conservancy system 5, Power station system 6, Chemical system 7, Petroleum industry system 8, Mine metallurgy system 9, Light industry system 10, Ship system
Water pump classification introduced:
1) Volumetric pumps use their studio volume changes to transfer energy; volumetric pumps use their studio volume changes to transfer energy, mainly piston pumps, piston pumps, gear pumps, diaphragm pumps, and screw pumps.
2) The vane pump utilizes the interaction between the rotating vane and water to transfer energy. There are centrifugal pumps, axial pumps and mixed-flow pumps. A hydraulic machine that uses power equipment and transmissions or uses natural energy to raise water from a low to a high altitude. Widely used in farmland irrigation, drainage and agriculture, animal husbandry, industrial and mining enterprises, urban water supply, drainage and other aspects. The pumps used in farmland irrigation and drainage, agricultural and animal husbandry production processes are called agricultural water pumps and are one of the main components of farmland irrigation and drainage machinery.
3) The water wheel pump is a combination of a water turbine and a vane pump. The above types of pumps are more representative of the following types.
4) Centrifugal pump Centrifugal pump is the most widely used in farmland irrigation and irrigation and agriculture and animal husbandry water supply. Mostly used for high lift and small flow situations. The single-stage centrifugal pump has a head of 5 to 125 meters, and the discharge flow is uniform, generally 6.3 to 400 meters 3/hour, and the efficiency is about 86 to 94%. Centrifugal pumps are pumps that use the action of centrifugal force to increase the pressure of a water body and cause it to flow. It is composed of pump casing, impeller and shaft. The power machine drives the rotating shaft, which drives the impeller to rotate at a high speed in the pump casing. The water in the pump is forced to rotate with the impeller to generate centrifugal force. Centrifugal force forces the liquid to be thrown from the periphery of the impeller, composing high-speed and high-pressure water flowing through the pump casing to discharge the pump, and a low pressure is formed at the center of the impeller so as to inhale a new flow of water and constitute a continuous flow transport function. The impeller has blades bent in the direction of reverse rotation, and its structure types are closed, semi-closed and open. The agricultural uses mostly closed impellers, and both sides of the blades are closed by disks. The pump body gradually expands into a volute shape in the direction of the outlet pipe.
The single-suction centrifugal pump that draws water from the impeller side suctions the double-suction centrifugal pump from both sides of the impeller. To increase the lift, multiple impellers can be mounted on the same shaft as a multi-stage centrifugal pump. The water discharged from the previous impeller enters the inlet of the latter impeller and is discharged from the latter impeller after being pressurized. Therefore, the more impellers, the higher the pressure. Some centrifugal pumps have a device that can automatically exclude the suction pipe and the air inside the pump body. Before the start, there is no need to irrigate the pump body. It is called a self-priming centrifugal pump, but its efficiency is often lower than that of a general centrifugal pump.
5) Axial flow pump consists of pump housing, impeller and shaft. Also known as propeller pump. There are several propeller blades on the impeller. When the impeller is driven by the power machine to rotate together with the rotating shaft, each blade pushes the water to one end, and at the other end, draws water from the water source so that the water is generated continuously along the direction parallel to the rotation axis. Flow to achieve the purpose of continuously transporting water. The pressure of the water flow is increased by the rotation of the impeller. After the rotating water flow from the impeller passes through the fixed guide vane, the rotating sub-velocity is eliminated, and due to the diffusion action, part of the kinetic energy is converted into pressure energy, and the water flow in the pump casing is pushed up in the axial direction and flows out of the outlet pipe. Axial flow pump is mainly used for low head and large flow rate. Head range is 1-25 meters; flow rate is 2.7-60.0 m3/s and efficiency is 85-90.5%. There are three types of vertical, horizontal and inclined installations, of which vertical axial pumps are used more often (Figure 2). The installation angle of the propeller blades on the hub of the large-scale axial flow pump impeller can be adjusted, or can be adjusted with time during the operation by the hydraulic drive shaft to adapt to the requirements of the head and flow changes, and to obtain higher productivity, so that the adjustable shaft is called Flow pump.
6) Submersible electric pump The pump impeller and the motor driving the impeller are all submersible pumps. There are two types of deep well and work surface. The deep well submersible pump supplies power to the motor through a cable that extends into the well, eliminating the need for a long axis of the drive. Therefore, the structure is compact, light in weight, and easy to install, use, and transfer. There is a tendency to replace long-axis deep-well pumps in areas where power is available, but It is not applicable to wells with large sediment content and non-powered areas. The electric motors for submersible pumps are dry type (all motor seals), semi-dry type (motor stator seal, and rotor in water), oil-filled (motor filled with oil to infiltrate windings) and wet (inside motor) Filled with water, the stator and rotor are all running in water) and other types. The first three kinds of seals all need to be sealed and require high precision in manufacturing and installation. As a result, submersible pumps for agricultural deep wells usually use wet motors. Their stator windings use water-resistant insulated conductors or cast synthetic resin at the ends of the stator windings and grooves, and the water enters the motor interior. Not much, the sealing structure can be greatly simplified and only sand control is required. Some deep-well submersible pumps have a head of up to 1400 meters and a maximum flow rate of 1.4 meters 3/second.
7) The specific use of the pump:
Pumps have different uses, different transport liquid media, different flow, head range, therefore, of course, its structure is not the same, the material is also different, summed up, can be roughly divided into:
1. Urban water supply 2, Sewage system 3, Civil engineering, Building system 4, Agricultural water conservancy system 5, Power station system 6, Chemical system 7, Petroleum industry system 8, Mine metallurgy system 9, Light industry system 10, Ship system
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