1. Select the appropriate wrench specifications (preferably a torque wrench) or an open-end wrench; use a micrometer with a range of 0 to 25mm. SHAOXING KEQIAO FANEVER IMPORT AND EXPORT CO., LTD , https://www.sxfanever.com
2. Choose soft lead wire with a diameter between 0.5 and 1.3mm, and cut each piece to a length approximately equal to the pitch circle circumference of the gear.
3. Perform the lead wire measurement procedure:
1) Assemble the driving and driven gears properly.
2) Apply a small amount of grease on the pitch circle of both gears, and place three separate pieces of soft lead wire on them.
3) Install the pump cover along with gaskets and bushings, and tighten the nuts symmetrically in 2-3 stages to ensure even pressure.
4) Carefully unscrew the cap nut in a symmetrical manner, remove the pump cover, take out the lead wires, and clean them thoroughly.
5) Measure the thickness of each lead wire at four different points using an outside micrometer, and record all measurements accurately.
4. Analyze the measurement data:
1) Calculate the average of the eight measured values to determine the axial clearance.
2) Compare the calculated axial clearance with the standard range (typically 0.06 to 0.10mm for normal pressure gear pumps, and up to 0.10 to 0.25mm for low-pressure pumps). Based on this comparison, you can decide whether the unit is ready for operation or if further repairs are needed.
This method ensures accurate measurement of the internal clearances, which is essential for maintaining the performance and longevity of the gear pump. Always follow safety procedures and double-check your measurements to avoid errors.