When the balance disc seat pressing ring is arranged, the interface of the balance water pipe is aligned with a notch on the upper of the disk seat. Otherwise, the balance pipe is blocked, the axial balancing device loses effect.
Long rod bolts at the beginning of the assembly, can only be a little tight. After the whole pump is in place, and then according to the data recorded in table 2-1 long rod bolts for fastening. Must be symmetric fastening, otherwise it will cause poor sealing between paragraphs.
Multistage centrifugal pump structure is more complex, wearing parts, high precision, in order to prevent failure, causing unnecessary losses, before commissioning should be carefully inspected. The commissioning should be fully prepared, strictly abide by the operating procedures, and the operation personnel to carry out the test once the failure of the test, should be immediately excluded. Similarly, the multi-stage pump in the operation of the failure should also be eliminated in a timely manner. After passing the test, the operation is normal, can handle the transfer procedures, the use of investment.
Check and prepare pre commissioning:
Inspection and maintenance records, inspection quality should be in accordance with the requirements of the inspection procedures, to confirm the overhaul record, the correct data.
Check lubrication, if not meet the requirements, or with timely replacement of lubricating oil.
The cooling water system should be smoothly.
Barring without the severity of uneven feeling, no noise, no packing gland skew.
Before the start of the hot
oil pump must be warm pump, preheat heating rate is not higher than 50 degrees per hour C. Load test
Complete the empty load test, the performance of the pump to meet the technical requirements, can be carried out load test, load test steps are as follows. Turning and turning on the cooling water.
Filling pump. Starting motor. Observe the outlet pressure of the pump, motor current and operating conditions. Slowly open the outlet valve of the pump until the normal flow rate. Regulating flow and pressure by regulating valve or pump outlet valve. Load test should meet the requirements as follows. Running smoothly without noise, lubrication and cooling system is working properly. The pressure and flow smoothly, achieve nameplate ability or check ability. Under the rated head, flow rate, the motor current does not exceed the rated value. Normal temperature of each part. Bearing vibration amplitude: working speed in the 1500r/mn below, should be less than 0.09mm; working speed in 3000r/122.
