1. Install the half piece coupling on the shaft
① According to the size of the coupling, measure the actual (composition) elements of the shaft and hole, and draw the loading terminal position line according to the regulations.
② Hammer drive method is used for small size and gap fit. First apply lubricating oil on the matching, install the key in the keyway, make the half piece coupling to the loading shaft, push and hit with a hammer (it is appropriate to hit the middle pad) until it is loaded into the terminal position.
The press assembly is used for the fit with interference, when the interference is large, the temperature difference method or the temperature difference method is used to match the press assembly. Temperature difference method assembly is the hole (half piece coupling) after heating expansion, and then installed on the shaft. Heating method The lubricating oil can be heated in the heating box, or the steam heating method, electric heating method, etc., can also be used to reduce the diameter of the cooling shaft, and then assemble the coupling. The coolant used for cold loading is liquid nitrogen (cooling temperature up to -190 ~ 195℃), liquid ammonia (cooling temperature up to -120℃), dry ice plus alcohol and acetone (cooling temperature up to -75℃).
2, coupling to find positive connection
After the coupling is installed on the journal, the two half couplings are initially aligned by adjusting the cushion iron method, so that the center of the two axes is roughly aligned, and the end face of the two half couplings is initially parallel, and then the bolts are put on to prepare for coaxial adjustment.
considerations
When assembling half coupling and shaft, it should comply with the provisions of equipment technical documents or construction acceptance specifications, and maintain a certain end clearance, but the end face of the rigid flange coupling is not allowed to have a gap.
When assembling, the loading depth mark can be made on the journal according to the size of the coupling to avoid excessive loading.
③ When starting to load, it is necessary to first keep the coupling end face perpendicular to the axis of the shaft, and then start hammering or pressing to prevent eccentricity.
④ When heating with oil, oil and fire should be absolutely isolated to prevent fire, and there should be no flammable items in the heating place.
< br \/ >
Safe use and precautions of coupling
① The coupling is not allowed to have more than the specified axis line skew and radial displacement, so as not to affect its transmission performance.
② The bolts of Ling's coupling shall not be loose or defective.
(3) The gear coupling and cross slider coupling should be regularly lubricated, generally adding grease once every 2 to 3 months to avoid severe wear of the gear teeth, causing serious consequences.
4 gear coupling tooth width contact length shall not be less than 70%; Its axial channeling momentum must not be greater than 5mm.
⑤ The coupling is not allowed to have cracks, if there is a crack, it needs to be replaced (can be struck with a small hammer, according to the sound judgment).
⑥ The key of the Ling coupling should be closely matched and should not be loosened.
7 Gear coupling tooth thickness wear, the lifting mechanism more than 15% of the original tooth thickness, the operating mechanism more than 25% should be scrapped, broken teeth should also be scrapped.
⑧ The elastic ring of the pin coupling and the sealing ring of the gear coupling should be replaced in time if there is damage and aging.