What is Submersible Axial Flow Pump?

Submersible Axial Flow Pump Including Vertical Type and Horizontal Type

What are submersible axial flow pumps used for?

QZB submersible axial flow pumps and QH(B) submersible mixed flow pumps are mainly suitable for the following occasions:

  ①Farmland irrigation and drainage;

  ②The municipal discharge of rainwater and mild sewage;

  ③Process water and cooling water in the industry;

  ④ Water transfer project in water conservancy.

The submersible axial flow pump can also be used in urban water supply, water diversion projects, urban sewage, and drainage systems, sewage treatment projects, circulating water in thermal power stations, dock water supply and drainage, water conservancy projects, drainage irrigation, aquaculture, etc.

Which company's submersible axial flow pump is best?

    Tuohai Pump Industry is a high-tech enterprise specializing in the production of various types of submersible sewage pumps, submersible axial flow pumps, submersible deep well pumps, flood control pumps, submersible mixers, mud pumps, hydraulic excavators, and other environmental protection equipment.

    Tuohai Pumps has advanced design, production, processing, assembly, and testing equipment.

    We have a domestic advanced water pump testing center with a maximum test power of 1000KW, test voltages of 380V, 660V, 3KV, 6KV, 10KV, and a maximum test diameter of 2 meters.

What is the working principle of submersible axial flow pump?

    The submersible axial flow pump and submersible mixed flow pump is using the thrust of the rotating impeller blades to make the liquid to be transported flow in the direction of the pump axis.

    Because the blades have a certain helix angle with the axis of the pump shaft, so when the shaft is driven to rotate by the motor,  a thrust (or lift) is generated on the liquid, and the liquid is pushed out from the discharge pipe.

    When the liquid is pushed out, a partial vacuum is formed in the original position, and the outside liquid will be sucked into the impeller along the tube under the action of atmospheric pressure. As long as the impeller rotates continuously, the pump will continuously suck and discharge liquid.

    Classification of Equipment:

        Submersible axial flow pumps and submersible mixed flow pumps can be divided into horizontal, vertical, and oblique types according to the installation position of the pump shaft. Only the pump body is different between them, and the internal structure is basically the same, the more commonly used is the vertical submersible axial flow pump.

        The vertical submersible axial flow pump is mainly composed of the pump body, impeller, guide vane device, inlet, and outlet.

        The shape of the submersible axial flow pump body is cylindrical, the impeller is fixed on the pump shaft, the pump shaft is supported by two bearings in the body, and the pump shaft is connected with the motor drive shaft through the top coupling.

        The impeller is generally composed of 2 to 6 curved blades, which are similar in shape to electric fan blades with twists.

    The structure of the blade has two types:

          Fixed impeller

          Adjustable helix angle impeller

             There are two types of the adjustable impeller, semi-adjustable and full-adjustable.

             The semi-adjustable blades are detachable. To change the angle, loosen the blades and manually adjust them;

             The fully-adjustable type is to automatically change the angle of the blades through a set of special follow-up mechanisms, and most of the blades of large pumps are fully-adjusted.

   The shape of the guide vane device is conical or cylindrical and is generally equipped with 6 to 10 guide vanes. The function of the guide vane device is to increase the pressure after the liquid from the impeller flows through the flow channel formed by the guide vanes and improve the efficiency of the submersible pump.

    The outlet pipe of the submersible axial flow pump is usually a 60° or 90° elbow, its function is to change the direction of the liquid outflow.

What is the difference between centrifugal pump and submersible axial pump?

     Centrifugal Pump

        Because centrifugal pumps are able to transport liquids mainly rely on centrifugal force, they are called centrifugal pumps. Most of centrifugal pumps can not be used underwater.

        The centrifugal pump is generally driven by an electric motor. Before starting the pump, the pump body and the suction pipe are filled with liquid. When the impeller rotates at high speed, the impeller drives the liquid between the blades to rotate together.

        Due to the centrifugal force, the liquid is thrown from the center of the impeller to the outer edge of the impeller (the flow rate can be increased to 15-25m/s), and the kinetic energy also increases.

        When the liquid enters the pump casing, as the flow channel in the volute-shaped pump casing gradually expands, the flow rate of the liquid gradually decreases, and part of the kinetic energy is converted into static pressure energy, so the liquid flows out along the discharge port at a higher pressure.

         A certain vacuum is formed at the center of the impeller due to the liquid being thrown out, and the pressure at the liquid level is higher than that at the center of the impeller. Therefore, the liquid sucked into the pipeline enters the pump under the action of the pressure difference. The impeller keeps rotating, and the liquid is continuously sucked and lifted up.

      Submersible Axial Flow Pump

         The working principle of the submersible axial flow pump is different from the centrifugal pump. It mainly uses the thrust generated by the high-speed rotation of the impeller to lift water. The lift generated by the blades of the submersible axial flow pump can push the water up.

         The submersible axial flow pumps are work underwater. Due to the high-speed rotation of the impeller, under the action of the lift generated by the blades, the water is continuously pushed upward. The impeller rotates continuously, and the water is continuously pressed to a high place.

         The work of the submersible axial flow pump is based on the lift theory in aerodynamics. When the impeller rotates at a high speed, the liquid particles in the pump body will be affected by the axial lift force from the impeller, causing the water flow to flow in the axial direction.

         The submersible axial flow pump looks like a water pipe, and the diameter of the pump casing is about the same as the diameter of the suction port.

What is the rate of submersible axial flow pump?

     The design service life of submersible axial flow pumps is more than 10 years.

     The blades of the submersible axial flow pump are made of stainless steel.

     The fuselage, pump suction chamber, and pressurized water chamber are all made of HT200 cast iron, which can bear the impact of a certain load and increase the service life.

     The bearing of the submersible axial flow pump adopts stainless steel bearing, which can reduce vibration, noise, safe and reliable operation, prolong service life, and improve product operating life.

     The mechanical seal adopts Bergman or other high-quality alloy mechanical seals, and the static seal adopts Dingqing-70 O-ring.

All exposed fasteners of the submersible axial flow pump are made of stainless steel.

What size submersible axial flow pump do I need?

    No.

    The submersible axial flow pump must work underwater because it relies on flowing water or other liquids to cool the motor.

If it works dry, without water or other liquid, the motor will burn out because it cannot be cooled.

How many horsepower is a submersible axial flow pump?

    The power rate is 7.5-630kW

How do I choose a submersible axial flow water pump?

    If you want to buy a submersible axial flow pump, you just need to provide the necessary parameters such as head and flow rate, and we can select the most suitable model for you.

    In addition, we can also provide you with installation design solutions of submersible axial flow water pump, and provide assistance in installation and other services.