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Problem solving and daily maintenance of slurry pumps

Published:

Nov 15,2024

During the daily operation of the slurry pump, failures can occur due to various reasons. This article lists the causes of failures, the corresponding solutions, and the daily maintenance of the slurry pump.

Problem solving and daily maintenance of slurry pumps

In the daily operation of slurry pumps, various reasons may lead to abnormal phenomena or other issues. When problems arise, being able to resolve them as quickly as possible is a quality that every technician should possess. Based on years of experience in the maintenance and repair of slurry pumps, some common faults and abnormal phenomena encountered during the operation of slurry pumps have been summarized, along with their causes and solutions. The specific content is as follows:

1. When the slurry pump experiences a failure to draw water during operation.

This situation is generally caused by air leakage in the suction pipe or instruments, or it may be due to the bottom valve of the slurry pump not being opened. When encountering this fault, the first step is to check where the air leak is and promptly seal it. Secondly, the bottom valve of the slurry pump should be repaired or replaced.

2. The slurry pump emits abnormal sounds and fails to draw water.

This situation is generally caused by air entering the suction water, resulting in abnormal noises from the pump body, while damage to the impeller or the presence of debris leads to the failure to draw water. When encountering this fault, technicians need to adjust the liquid level in the pump pit and check the impeller. If it is damaged or aged, it should be replaced promptly, and debris inside the pump body and impeller should be cleaned.

3. The slurry pump exhibits severe vibrations and abnormal conditions.

This fault may generally be caused by the following issues:

① The slurry pump may be experiencing cavitation.

② The motion trajectories of the pump shaft and motor are not concentric.

③ The foot bolts of the slurry pump have become loose.

The solutions are as follows:

① Adjust the outlet valve of the slurry pump reasonably to ensure it operates within the specified performance parameters.

② Align the pump shaft and motor shaft to ensure they are on the same centerline.

③ Check whether the foot bolts of the slurry pump are loose and tighten them.

4. The slurry pump pipes are blocked.

This fault is generally caused by air leakage at the inlet of the slurry pump, and it may also be due to waste inside the pipe. The solution is to check the air leakage at the inlet of the slurry pump and seal it. Secondly, check and clean the waste inside the pipe. If there is too much waste, the slurry pump must be shut down first before cleaning to avoid safety issues.

5. The pressure gauge of the slurry pump shows pressure, but the pump does not discharge water.

This fault may be due to issues with the rotation direction, blockage in the impeller flow path, or insufficient pump speed. The solutions include: First, correct the rotation direction of the slurry pump motor to ensure it is correct. Second, remove the inlet pipe joint for cleaning, especially to clear debris in the flow path. Third, increase the pump speed to within the rated requirements to ensure normal operation of the slurry pump.

6. The slurry pump experiences overheating of the pump shaft.

This fault may be caused by the following reasons: First, insufficient lubrication oil. Second, debris has entered between the shaft and the ball bearing. Third, there is no cooling water inside the slurry pump. Fourth, the bearings of the slurry pump are damaged. The methods to resolve these issues are: First, add lubrication oil to the slurry pump. Second, remove debris from inside the slurry pump. Third, supply cooling water to the slurry pump. Fourth, replace the bearings of the slurry pump.