Method for Measuring the Compression of Mechanical Seals

How to measure the compression of mechanical seals?

Sealing compression measurement steps:
Before measuring the compression of the seal, it is necessary to understand the phase position relationship of each part of the seal to avoid calculation errors in the measurement process.

Measure the dimensions of the bushing positioning table to the sealing surface

1. Before measurement, it is necessary to carefully check whether the position of the moving ring on the shaft sleeve is in place and correct;
2. Distinguish between balanced and unbalanced sealing measurement methods;
3. Balance seal can be measured in place in one step! Non-equilibrium seal must be measured and calculated in two steps to obtain the data;
4. In order to obtain correct measurement data, it is generally necessary to measure the average value of more than two points;

Measurement of gland positioning surface to static ring sealing surface

1. Pay attention to the selection of measuring points when measuring, generally more than 3 points should be measured symmetrically;
2. If there is too much difference in the measured value, check whether the static ring is installed in place;
3. When measuring, be sure to handle gently to avoid scratching the sealing surface of the static ring;

Measure gland sealing surface to positioning table dimensions

1. When measuring the gland to the sealing surface, it is generally necessary to measure more than 3 points symmetrically;
2. When the measurement data difference is too large, check whether the gland is deformed or corroded;
   Checking whether the static ring installation is in place is the basic element to ensure the accuracy of measurement data;

Measure the dimensions from the bushing positioning table to the bearing box positioning surface

1. When measuring the bushing positioning table to the bearing box positioning surface, it is necessary to measure with the bridge, generally using the caliper body instead;
2. When measuring, pay attention not to use too much force (make the bridge bend) to avoid inaccurate measurement;
3. When measuring, pay attention to the depth ruler must be flat with the positioning surface of the shaft sleeve;

Dimensions of bridge to bearing box positioning surface

1. When measuring, we should also use the bridge to measure, and the depth ruler must be flat with the bridge floor;
2. When measuring, pay attention not to use too much force (make the bridge bend) to avoid inaccurate measurement:

Large cover positioning surface to large cover sealing table measurement

1. The bridge should be used for measurement, and the measurement data should be subtracted from the thickness of the bridge before the actual large cover positioning surface is transferred to the large cover sealing table
2. When measuring, pay attention to the force of the depth ruler, which can not make the bridge bend:
3. Measurement of bridge thickness
4. Measurement The thickness of the bridge can be measured with a depth gauge or vernier caliper:
5. It is best to use a bridge with high strength accuracy as a measurement benchmark;