Summary

S. SH type pump is a single-stage, double suction, pump shell split centrifugal pump used for sucking and delivering clean water and liquids with physical and chemical properties similar to water.
When the head of this type of pump is between 9 meters and 140 meters, the flow rate is between 126 meters/hour and 12500 meters/hour, and the maximum temperature of the liquid should not exceed 80 ℃. It is suitable for factories, mines, urban water supply, power stations, large-scale water conservancy projects, farmland irrigation and drainage, etc. The 48SH-22 large pump can also be used as a circulating pump for thermal power plants.

The meaning of pump model: such as 10SH-13A

The diameter of the suction port is divided by 25 (i.e. the diameter of the suction port of the pump is 250 millimeters)
S. SH --Double suction single-stage horizontal centrifugal clean water pump
13--Specific speed divided by 10 (i.e. the specific speed of the pump is 130)
A--indicates that the pump has replaced the impeller with a different outer diameter

Structural description

S. The suction and discharge ports of the SH type pump are both located below the axis of the pump, in a horizontal direction and perpendicular to the axis. The pump cover of the pump is fixed to the pump body with double headed bolts and conical positioning screws, making it easy to open and inspect all parts inside the pump without disassembling the inlet and outlet pipelines
As a result, the maintenance of the electric motor is extremely convenient. From the perspective of the transmission direction, the SH type water pump rotates counterclockwise; The S-shaped water pumps all rotate clockwise
Turn;
S. The main components of SH type pump include: pump body (1), pump cover (2), impeller (3), shaft (4), double suction sealing ring (5), shaft sleeve (6), and bearing body (14).

The pump body (1) is made of cast iron. The working chamber that forms the impeller with the pump cover has pipe screw holes for installing vacuum and pressure gauges on the flanges of the inlet and outlet channels. The lowest disposal point for the neck of the pipe is a screw hole for draining water.
The pump cover (2) is made of cast iron. There are screw holes on the upper part for installing water seal pipes and vent pipes, as well as hooks for lifting the pump cover.
The impeller (3) is made of cast iron and has a symmetrical shape with twisted blades between the two walls. Liquid enters the impeller from both sides and undergoes static balance testing during manufacturing.
Shaft (4) is made of high-quality carbon steel. The center of the shaft is the impeller, which is fixed with keys, shaft sleeves, and shaft sleeve nuts on both sides. The right end of the shaft is equipped with a coupling, which is directly connected to the motor. Belt transmission is not allowed at the coupling end. If belt transmission is required, a separate support bracket must be installed
Hold the pulley.
Double suction sealing ring (5) is made of cast iron to prevent high-pressure water from leaking back into the inlet part of the water pump. A protruding semi-circular ring is made on the double suction sealing ring and embedded in the pump body to fix it. It is a vulnerable part and can be replaced with spare parts after wear.
The shaft sleeve (6) is made of cast iron and is used to fix the position of the impeller and protect the wear of the shaft inside the packing chamber. It is a vulnerable part and can be replaced with spare parts after wear.
S. The SH type pump has two supports and uses a single row radial ball bearing. The bearing part A, located near one end of the coupling in the bearing body (14), and the other end, referred to as bearing part B, are lubricated with grease. Due to the complete symmetry of the impeller, theoretically, the water pump does not generate axial force. However, in manufacturing, it is difficult to achieve exactly the same gap between the water flow passing parts and the sealing ring on both sides of the water pump. Therefore, the water pump may generate axial force, which is borne by the single row radial ball bearing in part B of the bearing.
The packing plays a sealing role, preventing air from entering the pump and the leakage of large amounts of liquid. The packing seal consists of a composite packing chamber, packing cover, packing ring, packing sleeve, and packing on the pump body and pump cover. A small amount of high-pressure water inside the pump cover flows into the packing chamber through the external water seal pipe (or internal water tank) and packing ring, serving as a water seal.
The tightness of the packing must be appropriate, neither too tight nor too loose, based on the liquid's ability to leak out drop by drop. If the packing is too tight, the bearing is prone to heating and consumes power. If the packing is too loose and the liquid leaks, it will reduce the efficiency of the water pump.

Structural diagram

1. Pump body 2. Pump cover 3. Impeller 4 . axle 5. Double suction sealing ring 6. Shaft sleeve 7. Packing bag 8. Filler 9. Packing ring 10. Water seal pipe 11. Packing gland 12. Shaft sleeve nut 13. Fixing screws 14. Bearing body 15. Bearing body cover 16. Single row radial ball bearing 17 Nut 18. Coupling components 19. Bearing sleeve 20. Bearing end cap 21 . key 22. Double headed bolt