Retention method for cylindrical parts

The traditional bearing and shaft, bearing and seat tie, pulley and shaft, gear and shaft, bushing and hole and other shaft one-hole matching parts, using dimensional interference does not reach the assembly strength, can not make the two surfaces contact, leaving the gap becomes loose and leakage, but also the cause of wear and corrosion. Therefore, the use of cylindrical parts holding adhesive can replace interference or excessive fit with gap fit, fill the gap, loosen and leak phenomenon, and prevent the deformation caused by the transition fit.

1. The shaft is machined so that the radial clearance between the shaft and the tie is 0.05 mm.

2. Use seal Shen multi-functional cleaning agent oil cleaning agent to clean the matching parts;

3. Apply the sealant to the fitting part of the journal, as shown in Figure l;

4. Turn around and slowly load the bearing;

5. Wipe away excess glue; Cure at 25℃ for 8 to 24 hours.

Matters needing attention

(1) It is not suitable to adjust the parts after gluing assembly, if it is necessary to adjust, it is necessary to apply gluing again.

(2) When the gap is large, appropriate measures should be taken to ensure the coaxiality.

(3) If it is difficult to disassemble by general methods, it can be heated locally to more than 230 ° C and kept for 5 minutes while it is hot.

Method of sealing pipe threads

The pipe thread is often sealed with polytetrafluoroethylene tape, which is a solid filler, it is impossible to fill the gap, and the Angle can not be adjusted after screwing in, and the vibration resistance is poor, and the rubber wire broken when screwing in is easy to block the pipeline, which is easy to cause leakage and loosening. Using sealing pipe thread sealant, can fill the thread gap, does not contain solvent, does not shrink when curing,

Assembly can adjust the Angle, good resistance to the medium, no leakage. Save time and money than teflon tape.

(1) Clean the internal and external threads with sealing multi-functional cleaning agent oil cleaning agent.

(2) Apply a circle of pipe thread sealant along the external thread, as shown in A 2.

(3) Install the pipe fittings carefully according to the conventional method, do not screw too tight.

(4) Within one hour, the assembly position can be adjusted.

(5) Curing at 25℃ for 8 to 20 hours can be used under pressure, and the curing time should be appropriately extended when the temperature is low.

(6) Sealing pipe thread sealant can not be used to seal pure oxygen or oxygen rich system, can not use butyl strong oxidizer (such as chlorine gas, etc.) pipeline, can not use butyl PVC or ABS plastic pipe fittings.

(7) If the pipe diameter is small, it can be disassembled by ordinary methods; When the pipe diameter is large or the thread is long, it is difficult to disassemble, and it can be properly heated to 230℃ while it is hot.

(8) When assembling again, the original adhesive layer or oil should be cleaned up, and then coated with adhesive assembly.

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