Common Faults And Solutions of CDL Vertical Multistage Centrifugal Pumps

CDL vertical multistage centrifugal water pump is an important equipment widely used in industry, agriculture and municipal engineering. Its high efficiency, stability and durability make it perform well in various fluid delivery tasks. However, due to long-term use and complex working environment, CDL vertical multistage centrifugal water pump may have various faults during operation. This article will introduce the common faults of CDL vertical multistage centrifugal water pump and their solutions in detail, aiming to provide users with effective maintenance and troubleshooting suggestions.

                                                                          Vertical Multistage Centrifugal Pump Manufacturer

Ⅰ.Working principle of CDL vertical multistage centrifugal water pump

Before discussing common faults, it is necessary to first understand the working principle of CDL vertical multistage centrifugal water pump. CDL vertical multistage centrifugal water pump drives the impeller to rotate at high speed through the motor. The liquid obtains kinetic energy and is thrown out under the action of the impeller. After being pressurized by the guide wheel and multi-stage impeller, it is finally discharged through the discharge port. Its main components include motor, pump body, impeller, guide wheel, bearing and sealing device, etc.

Ⅱ.Common faults of CDL vertical multi-stage centrifugal water pumps

1. Pump does not start or starts with difficulty

Cause of fault

Power supply not connected or voltage insufficient

Motor fault

Foreign matter stuck in the pump

Bearing damage

Solution

Check power connection to ensure normal voltage

Check motor and troubleshoot

Clean foreign matter in pump

Replace damaged bearings

2. Insufficient pump flow

Cause of failure

Clogged suction pipe

Worn or damaged impeller

Air in the pump

Insufficient motor speed

Solution

Clean the suction pipe

Replace the worn or damaged impeller

Remove air from the pump

Check the motor to ensure normal speed

3. Insufficient pump head

Cause of failure

Impeller is worn or damaged

Air in the pump

Motor speed is insufficient

Resistance in the suction or discharge pipe is too large

Solution

Replace the worn or damaged impeller

Remove air from the pump

Check the motor to ensure the speed is normal

Check and clean the pipe to reduce resistance

4. Excessive noise and vibration from the pump

Cause of the fault

Air in the pump

Worn or damaged bearings

Imbalanced impeller

Unsound foundation

Solution

Eliminate air from the pump

Replace worn or damaged bearings

Correct impeller balance

Reinforce foundation to ensure stability

5. Pump leakage

Cause of failure

Worn or damaged seal

Loose connection

Broken pump body or pipe

Solution

Replace worn or damaged seal

Tighten connection

Repair or replace broken pump body or pipe

6. Motor overheating

Fault causes

Excessive motor load

Poor motor ventilation

Worn or damaged motor bearings

Unstable power supply voltage

Solutions

Check and adjust motor load

Improve motor ventilation conditions

Replace worn or damaged motor bearings

Check power supply voltage to ensure stability

7. Pump efficiency decreases

Causes of failure

Impeller is worn or damaged

Air in the pump

Resistance in the suction or discharge pipe is too large

Motor speed is insufficient

Solutions

Replace the worn or damaged impeller

Remove air from the pump

Check and clean the pipe to reduce resistance

Check the motor to ensure the speed is normal

CDL variable frequency constant pressure water supply equipment

Ⅲ.Maintenance of CDL vertical multistage centrifugal water pump

1. Regular inspection

Regularly check the various parts of the pump, including the impeller, bearings, sealing devices and motors, to ensure their normal operation.

2. Clean the pump body

Regularly clean the pump body to prevent the accumulation of debris and dirt that affect the performance of the pump.

3. Lubricate the bearings

Regularly lubricate the bearings to ensure smooth operation and extend their service life.

4. Check the sealing device

Regularly check the sealing device to prevent leakage and replace it when necessary.

5. Check the motor

Regularly check the motor to ensure its normal operation and prevent overheating and damage.

6. Check the pipeline

Regularly check the suction and discharge pipelines to ensure that they are unobstructed and reduce resistance.

7. Record operation data

Record the operation data of the pump, including flow, head, efficiency and motor temperature, to detect and deal with abnormal conditions in a timely manner.

CDL vertical multistage centrifugal water pumps play an important role in various fluid delivery tasks, but due to long-term use and complex working environment, various faults may occur. This article introduces the common faults of CDL vertical multistage centrifugal water pumps and their solutions in detail, and provides effective maintenance suggestions. Through correct maintenance and timely troubleshooting, the efficient, stable and long-term operation of CDL vertical multistage centrifugal water pumps can be ensured, its service life can be extended, and work efficiency can be improved.