Mechanical seal compression refers to the axial compression distance of the mechanical seal after installation. The measurement method is to measure the distance from the spring seat or spring locating surface of the rotating ring to the stationary ring face. The difference between these two positions is the mechanical seal compression amount.
Preparation Before Measurement
Before measuring the mechanical seal compression, make sure that the mechanical seal is in an uninstalled or disassembled condition. This allows the relative position between the rotating ring and stationary ring to be measured directly.
Prepare suitable measuring tools, such as a vernier caliper or micrometer, to ensure accurate measurement results.
How to Measure Mechanical Seal Compression
The measurement steps are as follows:
1.Measure from the spring seat or spring locating surface of the rotating ring.
2.Measure the distance along the axial movement direction of the rotating ring to the stationary ring face.
3.Compare the distance between the natural condition and the spring-loaded condition. The difference between these two values is the mechanical seal compression amount.
The distance between the rotating ring and stationary ring will change when the mechanical seal is compressed by the spring. This dimensional change is the actual compression value of the mechanical seal.
Precautions for Measuring Mechanical Seal Compression
Pay Attention to the Stationary Ring Seal Ring
During measurement, pay attention to the sealing ring installed on the stationary ring. The seal ring should not affect the measurement result.
Refer to Mechanical Seal Design Documents
The expected compression range should be confirmed according to the mechanical seal design documents or technical specifications. The measured compression value should be checked to ensure it meets the design requirements.
Consider Different Mechanical Seal Configurations
Different mechanical seal designs and spring characteristics can affect the compression value. Therefore, the specific seal configuration and spring parameters should be confirmed before measurement.
How to Determine Mechanical Seal Compression
When the mechanical seal manufacturer is known, the compression amount is normally determined by the manufacturer. There is no need to recalculate the compression value. The seal chamber dimensions should be designed according to the compression value provided by the manufacturer, and installation should be carried out accordingly.
When the operating conditions are uncertain, or when the mechanical seal requires design calculation by the manufacturer, the compression amount, compression coefficient, and other related parameters need to be determined again by the mechanical seal manufacturer.
Conclusion
The measurement of mechanical seal compression requires correct measurement procedures and attention to relevant factors to ensure accuracy and reliability. Understanding the mechanical seal configuration and spring characteristics is important for determining the correct compression amount.