Adjustment of the seal spring compression when replacing bearings in a pump
Thread Content
During maintenance, it is common to have to replace the bearings of pump motors while ensuring that there is no leakage. The mechanical seals often experience a reduction in their compression amount due to prolonged use; if the compression amount is adjusted back to the original level of 3mm–5mm, could this lead to an increase in compression force? I feel that for this adjustment of the compression amount, it shouldn’t be determined based on distance; instead, the specific pressure exerted on the seal should be measured. So I searched on Baidu and came across a term called \"spring specific pressure\", which is the ratio of the compression force to the contact area. But I couldn’t find its unit. Is it N/mm2? I plan to buy a digital scale to use for pulling things while performing sealing operations; how can I calculate the spring compression ratio?
Seals all have a working size, which is indicated on the samples
You can use a simple method to measure the spring stiffness: place the spring alone on a platform and place a weight on top of it, making sure the spring does not bend. By measuring the relationship between the weight and the degree of compression, you can estimate the stiffness value. The stiffness of a compressed spring cannot be measured by stretching it; instead, determine the appropriate compression length on a diagram and assemble the component according to that diagram
No stretching is needed; I’ll create a mold first and then measure the compressive force. What I want to know now is what the typical compressive force is in kg/mm2
0.15 to 0.2 MPa is sufficient
I mean, the compression amount of a mechanical seal has nothing to do with bearing replacement, right?
1.3-2.5kgf/cm2
What does kgf f mean?