Small machine coupling mainly rigid coupling, tooth-shaped coupling and flexible coupling several are as follows: First, the rigid coupling The rigid coupling is generally used in the power of smaller centrifugal pumps , First remove the bolts and rubber elastic ring repair, the temperature is not high liquid, two half-coupling plane clearance of 2.2 ~ 4.2mm, the temperature is higher than the shaft channeling amount of 1.55 ~ 2.05 mm . Coupling rubber elastic ring should be smaller than the perforation diameter 0.15 ~ 0.35 mm. At the same time disassembly must use special tools, keep smooth, do not allow scratches scratch. Second, the gear coupling Toothed coupling flexibility is better, with automatic centering performance. Maintenance is generally carried out by the following methods: 1, check the coupling tooth surface engagement, the contact area along the tooth height of not less than 50%, along the tooth width of not less than 70%, no serious pitting tooth surface, wear and tear. 2, the outer ring gear coupling ring beating not more than 0.03mm, round beating not more than 0.02mm. 3, if you want to remove the ring gear, you must use special tools, not beat, so as not to bend or damage the shaft. When reassembly, the ring gear should be heated to about 200 ℃ before reloading to the shaft. External gear and shaft interference is generally 0.01 ~ 0.03mm. 4, back to the middle of the barrel or other parts should be assembled according to the original mark and data. 5, with a torque wrench evenly tighten the bolts. Third, the diaphragm flexible coupling 1, cleaning check two and a half coupling surface, there should be no cracks, wear, and the spacer sleeve should be matched with the surface should be smooth, burr-free, two coupling shaft Deviation should be less than 0.003mm. 2, cleaning and check the spring, there should be no cracks, deformation. 3, clean and check the bolts, the surface should be no cracks, wear, deformation. 4, find the correct requirements: axial ± 0.03mm, ± 0.05mm radial.
