1. To master the technical requirements of balance pipe diameter. Balance tube removed to check the gasket is appropriate, the inner diameter of the balance tube gasket should be greater than the balance of the pipe diameter, the aperture will cause the throttle effect, the axial force will increase.
2. To master the measurement and requirements of the balance disc clearance, the two clearance of the balance disc is: radial clearance and axial clearance. The automatic balance of the balance disc is produced by the change of the axial gap, and it must be realized by the fixed radial clearance. The balance of the balance of the axial force of the principle of balance: the existence of pressure on both sides of the balance, there is a backward balance force, the direction and the axial force on the impeller on the contrary.
The balance plate has the characteristics of automatic balance axial force. Balance disc axial movement of the smaller, the higher reliability of pump to ensure the balance disc work experience: when the balance disc balance disc can not open the grind, appropriate increase radial clearance, increase the force balance and the balance disc open. When the balance disc axial clearance is too large, leakage is too large, and make the pump out of balance, appropriate to reduce the gap between the gap, reducing the pressure on the balance plate, to ensure that the balance of work and reduce the amount of leakage. Inspection often visually on wheel clearance changes can be judged whether the balance disc wear, balance disc wear, on wheel clearance will becomes smaller.
3. Master parts and components of the mouth. All parts of the end of the mouth to clean, no burr, no percussion with the end of the end, to ensure that all parts of the concentric, coaxial. Ring clearance assurance in cold oil pump mouth ring diameter less than 100mm 0.40-0.60mm than 100mm 0.60-0.70mm, hot oil pump mouth ring diameter less than 100mm for 0.60-0.80mm, greater than 100mm 0.80-1.00mm.
4. Master the measurement and treatment of rotor shaking. Rotor wobble value measurements, including radial and axial, balance disc sleeve are radially round beating 0.03mm, balance disc axial runout 0.04mm, impeller mouth ring radial runout 0.06mm impeller end circular 0.20mm. Rotor sloshing beating value is exceeded, the should check the ground impeller face, deburring, high.
5. Grasp the calculation of end face pressure. Oil =0.5, liquid hydrocarbon, =0.707, P, =P, K=d2-d0/d2-d1,
P end =P bomb + (K-) *P
P selection: a single-stage cantilever pump, no balance hole rib plate, P = P, a balance hole, P = P, the two stage cantilever pump, Y type, P = P, ay type, P =PI out = P + P / 2, the double support pump. Multistage pump P dielectric P into
6. Master the measurement of the axial clearance between the positioning bearing and the balance disc. Measurement methods: at the shaft head hit the table, table value of zero, the locking shaft bearing cover and axis pushed aside, the table values for balance disc and the locating bearing axial clearance, the general 0.04-0.08mm.
7. Master the technical parameters of maintenance procedures.
