How to operate the on-site balancing method in the solution to abnormal vibration of ZJY212-20-S shaft mounted reducer

The on-site balancing method in the solution to abnormal vibration of ZJY212-20-S shaft mounted reducer is as follows:

1. Preparation work:

Tools and equipment: Prepare vibration analyzer, weighing block (various specifications), electronic phase meter, wrench, marker pen, safety lock, etc.

Safety measures: Stop the machine and cut off the power supply, lock and tag it, and confirm that the equipment is completely stationary before operating.

Check the equipment: eliminate unbalanced problems such as bearing damage, looseness, and misalignment.

2. Initial vibration measurement:

Installing vibration sensors on the bearing seat of the reducer or near the rotor generally requires installation in both horizontal and vertical directions.

Start the device to operating speed and use a vibration analyzer to record the initial vibration values, including amplitude and phase angle.

3. Data analysis:

Use a vibration analyzer to identify whether the dominant frequency is 1 × speed frequency, in order to confirm whether it is static or dynamic imbalance.

Determine the type of imbalance, if it is a rotor with a large aspect ratio, double plane balancing may be required.

4. Trial weight method (example of single plane balance):

Weight selection: The weight of the weight block is usually 10% -30% of the estimated unbalance of the rotor.

Installation test weight: Fix the test weight block at any angle position of the rotor, such as 0 ° position, then restart the equipment and measure the vibration value, recording the amplitude and phase angle at this time.

5. Calculate correction amount:

Calculate the position and size of the correction weight through vector analysis or balancing software. For example, given the original vibration vector and the vibration vector after trial weight, calculate the impact vector of the trial weight to obtain the required counterweight.

6. Install calibration counterweight:

According to the calculation results, install precise weight blocks at the specified angle to ensure firm fixation.

7. Verification and fine-tuning:

Run the equipment again and measure the vibration value. If the amplitude drops below the corresponding level that meets the ISO 1940 standard, the balance is successful. Otherwise, repeat the steps of weight testing, calculation, and installation of the counterweight until the vibration value meets the requirements.

Record the vibration data, counterweight position, and weight before and after calibration, and generate a report for archiving.