No matter what horizontal centrifugal pump is installed correctly before use, if it is installed incorrectly, the centrifugal pump will be unusable and even damage the centrifugal pump. The basic level and elevation of the pump should be reviewed before it is installed. The centerline alignment, level alignment, and elevation alignment of the pump are the key points in the installation process.
1. Center line alignment of horizontal centrifugal pump
Centerline alignment is to align the vertical and horizontal centerlines of the pump. First determine the vertical and horizontal center lines on the top surface of the foundation, and then hang vertical lines on the pump inlet and outlet flange surfaces (double-suction centrifugal pump) and the center of the shaft respectively. Adjust the position of the pump so that the vertical line coincides with the vertical and horizontal center lines on the foundation.
2, horizontal centrifugal pump horizontal alignment
Horizontal alignment is to align the vertical and horizontal levels of the pump. Generally, the method of using a level gauge or hanging a vertical line, a single-stage centrifugal pump is measured on the pump shaft and outlet flange.
Double-suction centrifugal pumps are measured on the inlet and outlet flange surfaces of the pump, and the shim is adjusted to center the bubble of the level, or make the distance from the flange surface to the vertical line equal or coincide with the vertical line. Horizontal double-suction centrifugal pumps can also choose 4 points that can be connected to form a cross on the horizontal open surface of the pump casing. Stand the level ruler on these 4 points, and use the level to read the reading of the level ruler at each point. If the readings are equal, the longitudinal and lateral levels of the pump are aligned at the same time.
3, horizontal centrifugal pump elevation correction
The elevation of the water pump refers to the elevation of the axis line of the water pump. The purpose of elevation correction is to check whether the elevation of the pump after installation is consistent with the design elevation, and measure it with a level and a level ruler. During the measurement, one level ruler is placed on the known leveling point elevation Hs, and the other level ruler is placed on the pump shaft.
