1、 Overview of FY type chemical submersible pump

The FY type chemical submersible pump is a single-stage single suction long shaft submersible centrifugal pump. Its markings, rated performance points, and flange connection dimensions are equivalent to the ISO2858 international standard, and its technical conditions are based on the ISO5199 standard. Compared with the original FY corrosion-resistant submersible pump, it has the advantages of small size, high efficiency, good energy-saving effect, and reliable operation. Suitable for conveying corrosive media containing slightly solid particles and abrasives.

The conveying temperature of the pump is generally between 0 and 105 ℃ When the temperature is between -20~0 ℃ and 105~180 ℃, insulation jackets and cooling jackets can be used, and low-temperature or high-temperature wear-resistant guide bearings can be used. Users should explain this situation.

If there are a small amount of solid particles in the conveying medium, the sliding bearing should be lubricated externally (with water and other allowed media with an external pressure greater than 0.2 MPa), and the user should explain this situation.

The working pressure of the pump is designed to be 1.6MPa.

The performance range of the pump is 1.6-2600m3/h flow rate and 5-132m head.

2、 Structure Description of FY Chemical Submerged Pump

The FY type mainly consists of pump body, pump cover, impeller, shaft, elastic coupling, pipe flange, guide bearing, intermediate connecting pipe, upper and lower outlet pipes, bearing frame, bottom plate and other parts.

The suction port of the pump follows the axis direction: the outlet is parallel to the axis.

The pump rotates clockwise when viewed from the suction port towards the motor end.

The vertical motor of FY type chemical submersible pump is fixed on the motor seat with double headed bolts and directly rotates with the pump through an elastic coupling. The middle connecting pipe of the pump body, the outlet pipe of the bearing frame, and the pipe flange are connected by bolts to form a whole and fixed on the large plate. The whole of the pump is installed on the container through the bottom plate. Except for the contact parts, other main components of FY type pump, such as the motor seat and bearing frame, are made of cast iron.

3、 Self flushing and external flushing of chemical submersible pumps

As shown in Figures 1 and 2 below:

The lubrication of the intermediate guide bearing generally adopts a self-lubricating method with an internal self flushing pipe (Figure 1)

If the conveyed medium is dirty or contains hard particles, an external lubrication method using an external flushing tube should be used (Figure 2).