Coupling alignment is also known as concentricity. After installing the pump and motor, the last task is to find the concentricity of the pump and motor, even if the axis of the pump and prime mover is in the same line, so as not to cause vibration operation during operation.

Method:

Ordinary pumps (water pumps, small oil pumps) can be roughly measured using a flat ruler or feeler gauge, but most devices require precise measurements and dial gauges for measurement. Generally, the levelness of the pump has been determined, and the reverse wheel of the pump is used as a reference for measuring and adjusting the reverse wheel of the motor to ensure the alignment of the motor and the pump.

Note: a1, a2, a3, a4 represent radial clearance, S1, S2, S3, S4 represent radial clearance a1 and axial clearance S1 when measuring axial clearance when the dial indicator is at 0º, and then measure them separately. Axial clearances of 90º, 180º and 270º were recorded and recorded on the inside and outside of the circle shown in the figure above. When the measurement returns to 0º, it must coincide with the original reading, otherwise the cause must be found, usually due to shaft movement or loose fixing bolts. The final measurement data must also meet the following conditions in order to be calculated correctly. a1 + a3 = a2 + a4S1 + S3 = S2 + S4

Method 2:

Draw two tables to align:

Install the dial indicator to the pump end, adjust the dial indicator to zero, rotate the reverse wheel one turn, and get a value every 90 degrees. When the dial indicator returns to its starting position, it must return zero. The sum of the left and right readings should be equal to the sum of the upper and lower values. The relative spatial positions of the two axes are then analyzed based on the readings and adjusted appropriately according to the deviation values. First adjust the left and right deviation of the coupling to the allowable value, and then adjust the height to the standard range.

Find the positive formula:

S1 = ± (the axial difference of the counting wheel (the absolute value of the opening) × the distance from pin 1 to the measuring point) ÷ diameter of the measuring point ± the circumferential radial interpolation (difference) value / 2

S2 = ± (axial difference of the opposite wheel× distance from foot 2 to the measuring point) ÷ diameter of the measuring point ± radial interpolation (difference) value in the circumferential direction / 2

First ±: if the opposite wheel is an upper opening, with a "+" sign; If it is a lower opening, the "-" sign can be understood as the order from top to bottom

The second ±: when the motor is low, take "+"; When the motor is high, take "-", which can be understood as a dial from top to bottom.

If S1 is positive (upper mouth open and motor is low), it means that the gasket should be a gasket, and the number of S1 is the thickness of the gasket to be padded.

Another: the diameter of the measuring point is the rotational diameter of the measuring point, not the diameter of the coupling. The left and right adjustments are similar.