Fault of positive displacement pump and its solution

Category: Water pump knowledge

2024-08-17

The positive displacement pump is a common fluid conveying equipment, which is widely used in various industrial fields. However, during use, the positive displacement pump will also have some failures, which will affect the normal operation of the equipment. The following will introduce the common faults and solutions of positive displacement pump.

1. failure phenomenon: insufficient flow of positive displacement pump

Reason:

1. Insufficient speed or problems with the driving device, causing the pump to not rotate normally.

2. The pipe or filter is blocked, which affects the fluid circulation. This problem may be caused by pipe blockage, internal accumulation of the pump or wear of the pump impeller.

3. The internal parts of the pump are seriously worn, resulting in a decrease in volume.

Solution:

1. Check the drive device to ensure its normal operation and adjust the speed.

2. Clean the pipes and filters to keep the fluid unblocked. The solution to this problem is to clean the pipeline, remove the accumulation, or replace the worn pump impeller. In addition, regular inspection and maintenance of the positive displacement pump can find problems in advance and solve them in time to avoid failures.

3. Check the internal parts of the pump and replace it in time if it is worn.

2. failure phenomenon: noise and vibration of positive displacement pump

Reason:

1. The installation of the pump is unstable, resulting in vibration during operation. The vibration of the pump body may be caused by the imbalance of the pump shaft, the loose support of the pump body or the weak foundation.

2. The internal parts of the pump are loose or damaged, producing abnormal sound. Noise problems may be caused by a loose base, worn bearings, or other component failures.

Changes in the physical properties of the fluid, such as excessive temperature or excessive viscosity, lead to unstable operation of the pump.

Solution:

1. Check and reinstall the pump to ensure its stability. The solution to this problem is to adjust the shaft balance of the pump, check the tightness of the supporting parts, and ensure that the foundation of the pump is stable. If the vibration problem cannot be resolved, further service or replacement of pump body components may be required.

2. Check the internal parts of the pump, tighten or replace the damaged parts. The solution to this problem is to check the fastening of the base, replace the worn bearings, and maintain and repair other parts. Through the above method, the noise level of the positive displacement pump can be effectively reduced, and the comfort of the working environment can be improved.

3. Adjust the physical properties of the fluid to meet the operating requirements of the pump.

3. failure phenomenon: positive displacement pump leakage

Reason:

1. Seals are aging or damaged, causing liquid leakage. Oil leakage problems may be caused by damaged seals, worn oil seals, or improper installation.

2. The pump body or pipe connection is loose.

3. The pump speed is too high, resulting in increased wear of seals.

Solution:

1. Replace the seal, select the appropriate material and model. The solution to this problem is to check the condition of the seals and oil seals to ensure that they are intact. If wear or damage is found, it should be replaced in time. In addition, it is necessary to carefully check the installation of the positive displacement pump to ensure that each connection is firmly fastened to avoid oil leakage.

2. Check and fasten the pump body and pipe connection.

3. Adjust the speed of the pump to ensure that it operates within a suitable range.

4. failure phenomenon: displacement pump overheating

Reason:

1. The fluid viscosity is too large or the temperature is too high, resulting in an increase in the operating load of the pump.

2. The speed of the pump is too high, and friction generates too much heat.

Solution:

1. Reduce fluid viscosity or adjust fluid temperature.

2. Adjust the speed of the pump to ensure that it operates within a suitable range. At the same time, strengthen the heat dissipation measures, such as increasing the heat sink.

Failure of positive displacement pumps may affect production efficiency and equipment life. Timely detection of faults and corresponding solutions can ensure the normal operation of the positive displacement pump and improve production efficiency. Therefore, when using positive displacement pumps, it is necessary to regularly check and maintain the equipment and keep the equipment clean and safe. Only in this way can we give full play to the role of positive displacement pumps and provide stable and reliable support for production.

In short, for the failure of the positive displacement pump, we need to analyze the cause according to the specific phenomenon and take corresponding solutions. During use, maintenance and inspection should be carried out regularly to ensure the normal operation of the positive displacement pump.

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