Comprehensive Deployment Across All Mines with Phase II Mobile Equipment Monitoring Expansion

1.Equipment Information

Equipment type: belt conveyor

Rated speed: 1312rpm

Related measurement points in this case: Motor free end 1H

2.Alarm and analysis process

Equipment alarm events:

2.1Analysis process

2.1.1Explanation of trends, indicator parameters and other evidence

The vibration at both ends of the motor increased significantly, then fell back, and is currently showing an upward trend again.

Main inclined shaft belt 2# drive unit/motor free end 1H/16k speed waveform (2-1000)_Multi-parameter analysis

2.1.2Explanation of evidence such as time domain, spectrum, and envelope demodulation

There is no obvious impact in the time domain waveform.

Main inclined shaft belt 2# drive unit/motor free end 1H/16k speed waveform (2-1000)_time domain waveform

The spectrum shows that the rotation frequency and its harmonics are significantly increased.

Main inclined shaft belt 2# drive unit/motor free end 1H/16k speed waveform (2-1000)_spectrum analysis

3.Diagnostic conclusions and recommendations

3.1Diagnostic conclusion

2023-06-01 03:35 Push diagnosis conclusion: The vibration at the motor end has increased, which is presumably related to the coupling abnormality and is currently continuing to deteriorate.

3.2Inspection and maintenance suggestions

It is necessary to arrange to check the actual situation of the on-site equipment as soon as possible. If the equipment runs in this state for a long time, there is a risk of failure. 1. Pay attention to the actual vibration changes at the motor end first, and check the coupling for wear or positioning abnormalities when appropriate; 2. Simultaneously pay attention to whether other parts at the motor end have abnormal vibrations, etc.

4.On-site inspection and maintenance process

1.2023-06-01 8:01 The on-site feedback was reported in the WeChat group and the class will deal with it. It is speculated that there is a problem with the snake spring.

2.On 2023-06-01 20:28, the mid-shift inspection revealed that the spring was broken and had been replaced.

5.On-site inspection and maintenance photos

The photos showed that the spring had broken in many places and the grease had basically deteriorated and failed.

Maintenance photo_1

6.Verification after inspection and maintenance

After replacing the snake spring, the vibration trend dropped significantly and remained stable.

Main inclined shaft belt 2# drive unit/motor free end 1H/16k speed waveform (2-1000)_Multi-parameter analysis

Comparison of multiple spectra shows that the energy of the rotation frequency and its harmonics has decreased.

Main inclined shaft belt 2# drive unit/motor load end 2H/16k speed waveform (2-1000)_spectrum analysis

7.Customer feedback form

None

8.Monitoring fault range

Timely and effective collection of equipment operating status data (vibration, temperature) is subject to the constraints of network connectivity and data transmission time, and also needs to consider interference from factors such as the equipment's own attributes and production processes. At the same time, the analysis and diagnosis of equipment status is based on changes in vibration effects caused by rotating parts failures. Therefore, the status monitoring system cannot guarantee monitoring of all types of faults. The monitoring system is configured according to the measurement point scheme recommended by Party B, and the range of faults that can be monitored and the description are as follows:

9.Notes

1. If the client of this report cannot provide basic unit parameters (such as unit transmission chain diagram, gearbox structure diagram, gearbox teeth number, related bearing models and brands), the accuracy of analysis and diagnosis will be affected;

2. This report is the analysis, diagnosis and maintenance opinions of the unit by Rongzhi professional technicians, which is for reference only. The specific maintenance and repair measures shall be decided by the client.

3. This report shall not be used as evidence for any claims, litigation, etc.;

4. The client has the obligation to keep the analysis report confidential and shall not provide this report to a third party, print it into other promotional materials, or publish it on the Internet or other public information platforms without the written permission of the trustee.

1.Equipment Information

Equipment type: plunger pump

Rated speed: 1500rpm

Related measurement points in this case: Motor drive end 2H

2.Alarm and analysis process

Equipment alarm events:

2.1Analysis process

2.1.1Explanation of trends, indicator parameters and other evidence

2.1.2Explanation of evidence such as time domain, spectrum, and envelope demodulation

Recently, the speed vibration at multiple measuring points of the unit has been increasing slowly.

61302 working face 4# emulsification pump_edge computing trend

There is no obvious impact feature in the velocity waveform.

61302 working face 4# emulsification pump_time domain waveform

The 1 times frequency of the transfer frequency is relatively high in the spectrum, and a small amount of harmonics can be seen.

61302 working face 4# emulsification pump_spectrum analysis

3.Diagnostic conclusions and recommendations

3.1Diagnostic conclusion

2023-07-06 10:25 Push diagnosis conclusion: The speed vibration of the motor and pump ends rises slowly and synchronously, which is speculated to be related to insufficient coupling or foundation stiffness.

3.2Inspection and maintenance suggestions

The equipment is currently in a state of monitoring and operation, and it is recommended to arrange inspections at an appropriate time. Pay attention to changes in equipment speed and vibration, check the coupling for wear, check the foundation for weaknesses or loose foundation bolts.

4.On-site inspection and maintenance process

2023-07-08 08:21 On-site feedback: The bolts on the pump station base are broken.

5.On-site inspection and maintenance photos

Inspection photos showed broken bolts and severe rust.

Inspection photos showed broken bolts and severe rust.

6.Verification after inspection and maintenance

After on-site maintenance, the speed vibration of the units decreased significantly.

Changes in unit speed trend before and after on-site maintenance

The waveform is similar to the previous one, with no obvious impact.

Changes in unit speed waveform after on-site maintenance

The spectrum is converted to 1 times frequency with reduced energy.

Changes in unit speed spectrum after on-site maintenance

7.Customer feedback form

None

8.Monitoring fault range

Timely and effective collection of equipment operating status data (vibration, temperature) is subject to the constraints of network connectivity and data transmission time, and also needs to consider interference from factors such as the equipment's own attributes and production processes. At the same time, the analysis and diagnosis of equipment status is based on changes in vibration effects caused by rotating parts failures. Therefore, the status monitoring system cannot guarantee monitoring of all types of faults. The monitoring system is configured according to the measurement point scheme recommended by Party B, and the range of faults that can be monitored and the description are as follows:

9.Notes

1. If the client of this report cannot provide basic unit parameters (such as unit transmission chain diagram, gearbox structure diagram, gearbox teeth number, related bearing models and brands), the accuracy of analysis and diagnosis will be affected;

2. This report is the analysis, diagnosis and maintenance opinions of the unit by Rongzhi professional technicians, which is for reference only. The specific maintenance and repair measures shall be decided by the client.

3. This report shall not be used as evidence for any claims, litigation, etc.;

4. The client has the obligation to keep the analysis report confidential and shall not provide this report to a third party, print it into other promotional materials, or publish it on the Internet or other public information platforms without the written permission of the trustee.

1.Equipment Information

Equipment type: Roller crusher

Rated speed: 1490rpm

Related measurement points in this case: 1# reducer input 3H

2.Alarm and analysis process

Equipment alarm events:

2.1Analysis process

2.1.1Explanation of trends, indicator parameters and other evidence

The speed trend of the 1# motor drive end and the reducer input end has been rising slowly recently.

Upper warehouse belt conveyor head crusher/1# motor non-driving end 1H/16k speed waveform (2-1000)_Equipment Multi-trend

2.1.2Explanation of evidence such as time domain, spectrum, and envelope demodulation

Explanation of evidence such as time domain, spectrum, and envelope demodulation

Upper warehouse belt head crusher/1# motor non-driving end 1H/16k speed waveform (2-1000)_time domain waveform

The frequency conversion and its numerous harmonics are visible in the spectrum.

Upper warehouse belt conveyor head crusher/1# motor non-driving end 1H/16k speed waveform (2-1000)_spectrum analysis

3.Diagnostic conclusions and recommendations

3.1Diagnostic conclusion

2023-08-02 08:22 Push diagnosis conclusion: The vibration of 1# motor and reducer increased, and there were obvious loose characteristics. It is speculated that it is related to the aggravated damage of the coupling and has deteriorated rapidly recently.

3.2Inspection and maintenance suggestions

It is necessary to arrange to check the actual situation of the on-site equipment as soon as possible. If the equipment runs in this state for a long time, there is a risk of failure. Check the looseness and wear of the coupling elastic parts, check whether there are any abnormalities in the bearing positioning and recheck the alignment of the unit.

4.On-site inspection and maintenance process

2023-08-03 11:33 On-site feedback: the plum blossom pad is broken. The plum blossom pad has been replaced and the anchor bolts have been tightened.

5.On-site inspection and maintenance photos

On-site feedback photos show that the plum blossom pad is broken.

Maintenance photo_1

Maintenance photo_2

6.Verification after inspection and maintenance

After the overhaul, the speed trend decreased significantly and the number of rotation frequency harmonics decreased significantly.

Multi-Equipment trend

Multi-time spectrum

7.Customer feedback form

None

8.Monitoring fault range

Timely and effective collection of equipment operating status data (vibration, temperature) is subject to the constraints of network connectivity and data transmission time, and also needs to consider interference from factors such as the equipment's own attributes and production processes. At the same time, the analysis and diagnosis of equipment status is based on changes in vibration effects caused by rotating parts failures. Therefore, the status monitoring system cannot guarantee monitoring of all types of faults. The monitoring system is configured according to the measurement point scheme recommended by Party B, and the range of faults that can be monitored and the description are as follows:

9.Notes

1. If the client of this report cannot provide basic unit parameters (such as unit transmission chain diagram, gearbox structure diagram, gearbox teeth number, related bearing models and brands), the accuracy of analysis and diagnosis will be affected;

2. This report is the analysis, diagnosis and maintenance opinions of the unit by Rongzhi professional technicians, which is for reference only. The specific maintenance and repair measures shall be decided by the client.

3. This report shall not be used as evidence for any claims, litigation, etc.;

4. The client has the obligation to keep the analysis report confidential and shall not provide this report to a third party, print it into other promotional materials, or publish it on the Internet or other public information platforms without the written permission of the trustee.

1.Equipment Information

Equipment Type: Centrifugal Pump

Rated speed: unknown

Related measurement points in this case: 4H on the pump impeller side

2.Alarm and analysis process

Equipment alarm events:

2.1Analysis process

2.1.1Explanation of trends, indicator parameters and other evidence

Recently, the total value trend of high-frequency acceleration on the pump impeller side has shown a significant upward trend.

3432 Coal Slurry Pump/Pump Impeller Side 4H/64k Acceleration Waveform (0.1-20000)_Trend Analysis

2.1.2Explanation of evidence such as time domain, spectrum, and envelope demodulation

There is a mass impact close to the cage spacing in the low-frequency acceleration time domain waveform.

3432 Coal Slurry Pump/Pump Impeller Side 4H/16k Acceleration Waveform (0.1-2000)_Time Domain Waveform

The envelope demodulation in the spectrum diagram shows the characteristic frequencies and harmonics of the bearing rolling elements, accompanied by the cage sidebands.

3432 Coal Slurry Pump/Pump Impeller Side 4H/16k Acceleration Waveform (0.1-2000)_Envelope Demodulation

The historical data envelope demodulation also roughly shows the characteristic frequency components of the bearing inner ring fault.

3432 Coal Slurry Pump/Pump Impeller Side 4H/16k Acceleration Waveform (0.1-2000)_Envelope Demodulation

3.Diagnostic conclusions and recommendations

3.1Diagnostic conclusion

2023-10-29 09:55 Push diagnosis conclusion: The pump impeller side bearing has medium-term damage, the rolling elements are pitted and peeled off, the inner ring is worn and pitted, and the cage is worn under stress. There may be a risk of failure in long-term operation.

3.2Inspection and maintenance suggestions

During inspection, pay attention to abnormal noises from bearings at both ends of the pump, improve bearing lubrication, and check bearing damage when appropriate.

4.On-site inspection and maintenance process

1.2023-11-01 10:33 On-site feedback: When replacing the impeller side bearing, pitting was found on the bearing raceway.

2.On-site feedback of maintenance photos on 2023-11-02 09:27, the bearing retainer was broken.

5.On-site inspection and maintenance photos

The inspection photos show that the cage is broken and the damage to the raceway is unknown (not disassembled).

Maintenance photo_1

6.Verification after inspection and maintenance

After the unit was overhauled, the total value of high-frequency acceleration on the pump impeller side decreased significantly.

3432 Coal Slurry Pump/Pump Impeller Side 4H/64k Acceleration Waveform (0.1-20000)_Trend Analysis

No obvious cage characteristic frequency impact is observed in the acceleration time domain waveform.

3432 Coal Slurry Pump/Pump Impeller Side 4H/64k Acceleration Waveform (0.1-20000)_Time Domain Waveform

The energy of the characteristic frequency of the bearing fault in the spectrum diagram disappears obviously.

3432 Coal Slurry Pump/Pump Impeller Side 4H/64k Acceleration Waveform (0.1-20000)_Spectrum Analysis

7.Customer feedback form

None

8.Monitoring fault range

Timely and effective collection of equipment operating status data (vibration, temperature) is subject to the constraints of network connectivity and data transmission time, and also needs to consider interference from factors such as the equipment's own attributes and production processes. At the same time, the analysis and diagnosis of equipment status is based on changes in vibration effects caused by rotating parts failures. Therefore, the status monitoring system cannot guarantee monitoring of all types of faults. The monitoring system is configured according to the measurement point scheme recommended by Party B, and the range of faults that can be monitored and the description are as follows:

9.Notes

1. If the client of this report cannot provide basic unit parameters (such as unit transmission chain diagram, gearbox structure diagram, gearbox teeth number, related bearing models and brands), the accuracy of analysis and diagnosis will be affected;

2. This report is the analysis, diagnosis and maintenance opinions of the unit by Rongzhi professional technicians, which is for reference only. The specific maintenance and repair measures shall be decided by the client.

3. This report shall not be used as evidence for any claims, litigation, etc.;

4. The client has the obligation to keep the analysis report confidential and shall not provide this report to a third party, print it into other promotional materials, or publish it on the Internet or other public information platforms without the written permission of the trustee.

1.Equipment Information

Equipment type: belt conveyor main drive

Rated speed: unknown

Related measurement points in this case: reducer input 3H

2.Alarm and analysis process

Equipment alarm events:

2.1Analysis process

2.1.1Explanation of trends, indicator parameters and other evidence

The acceleration vibration trend of each measuring point of the gearbox is stable.

1001 Main Inclined Shaft 1# Belt Conveyor/Reducer Input 3H/128k Acceleration Waveform (0.1-2000)_Equipment Multi-trend

2.1.2Explanation of evidence such as time domain, spectrum, and envelope demodulation

There is no obvious impact in the acceleration time domain waveform.

1001 Main Inclined Shaft 1# Belt Conveyor/Reducer Input 3H/128k Acceleration Waveform (0.1-2000)_Time Domain Waveform

The fault frequency and harmonics of the inner ring of the 3-axis bearing can be seen in the low-frequency band of the spectrum, along with the 3-axis frequency conversion sidebands.

1001 Main Inclined Shaft 1# Belt Conveyor/Reducer Input 3H/128k Acceleration Waveform (0.1-2000)_Spectrum Analysis

3.Diagnostic conclusions and recommendations

3.1Diagnostic conclusion

2024-01-16 15:07 Push diagnosis conclusion: The inner ring raceway of the gearbox three-axis bearing has peeled off and has slowly deteriorated recently.

3.2Inspection and maintenance suggestions

During inspection, pay attention to abnormal noises at the three-axis bearing positions of the gearbox and iron filings and impurities in the lubricating oil, and check the bearing damage when the opportunity arises.

4.On-site inspection and maintenance process

1.2024-01-16 23:19 After on-site inspection, it was reported that there was pitting corrosion in the inner raceway of the three-axis bearing, and the gearbox is planned to be replaced in the near future;

2.2024-02-01 09:57 On-site feedback: The gearbox has been replaced on January 17.

5.On-site inspection and maintenance photos

The inspection photos show pitting and small-area peeling on the inner ring raceway of the bearing.

Maintenance photo_1

6.Verification after inspection and maintenance

After the maintenance, the machine was restarted and the acceleration vibration at the gearbox measuring point dropped, and the current trend is stable.

1001 Main Inclined Shaft 1# Belt Conveyor_Equipment Trends

After the overhaul, the bearing fault frequency spectrum lines in the low frequency band of the acceleration spectrum disappeared.

1001 Main Inclined Shaft 1# Belt Conveyor/Reducer 3\4 Axis Input 5A/128k Acceleration Waveform (0.1-2000)_Spectrum Analysis

7.Customer feedback form

None

8.Monitoring fault range

Timely and effective collection of equipment operating status data (vibration, temperature) is subject to the constraints of network connectivity and data transmission time, and also needs to consider interference from factors such as the equipment's own attributes and production processes. At the same time, the analysis and diagnosis of equipment status is based on changes in vibration effects caused by rotating parts failures. Therefore, the status monitoring system cannot guarantee monitoring of all types of faults. The monitoring system is configured according to the measurement point scheme recommended by Party B, and the range of faults that can be monitored and the description are as follows:

9.Notes

1. If the client of this report cannot provide basic unit parameters (such as unit transmission chain diagram, gearbox structure diagram, gearbox teeth number, related bearing models and brands), the accuracy of analysis and diagnosis will be affected;

2. This report is the analysis, diagnosis and maintenance opinions of the unit by Rongzhi professional technicians, which is for reference only. The specific maintenance and repair measures shall be decided by the client.

3. This report shall not be used as evidence for any claims, litigation, etc.;

4. The client has the obligation to keep the analysis report confidential and shall not provide this report to a third party, print it into other promotional materials, or publish it on the Internet or other public information platforms without the written permission of the trustee.