Pump rotor working under high speed, if the quality is not balanced, the rotation will generate a larger centrifugal force, water pump vibration or damage. On the rotor balance is through its parts, including shaft, impeller, shaft sleeve, balance disc, etc.) of the mass balance to achieve, so the new change of the impeller static balance test should be carried out. The specific method is:
(1) the impeller is installed on the false shaft, in has adjusted the level of the static balance test bench. Test-bed has two orbit, false axis can freely on the roll.
(2) in the side of the impeller on tag. If the quality of the impeller imbalance, the heavier side always automatically transferred to the following. Where lay particular stress on the symmetry position (that is, the lighter side) increased weight (with surface stick or use clamps to increase or decrease in iron), until the impeller can stop at any position can be.
(3) increase the quality of the block. Usually, we are not in the side of the impeller is lighter weight, but on the heavier side to achieve the balance of the impeller by using the method of reducing weight. Weight loss, milling machine milling or grinding wheel grinding (when removing is), but pay attention to the depth of the milling or grinding shall not exceed one third of the impeller cover plate thickness. After static balance of the impeller, static balance shall not exceed the allowable deviation value of impeller outer diameter value with 0.025 g/mm product. For example, the impeller diameter of 200 mm, allowable deviation for 5 g. |
