A progressive cavity pump is a time-honored conveying device that relies on the intermeshing of an eccentric screw and a rubber stator to convey materials. Compared to other pumps on the market today, progressive cavity pumps are characterized by a stable flow rate, no pulsation, and can handle a wide range of media, including highly viscous media and media containing solid particles. However, as the equipment is used for a longer period of time, it is inevitable that some failures will occur. This article will make a detailed analysis of the common faults of progressive cavity pumps and propose corresponding solutions.
1. The motor rotates, and the screw pump body does not rotate.
During operation, sometimes the motor rotates but the screw pump body does not. Users can first check whether the motor speed and speed ratio are normal to eliminate motor faults. At the same time, it is also a requirement to check whether the pump casing is too tight and whether the medium flow in the pump is smooth. If there is a blockage of hard solids or other sorted waste in the pump chamber, grease or soap can be introduced into the pump chamber and then turned twice with a wrench to unclog it. In addition, components such as pump shafts and bushings need to be inspected for age or damage, and replaced with new ones if necessary.
Second, the motor has a sound but the pump does not rotate.
Another common fault is when the motor has a sound but the pump does not turn. This is usually due to problems with bearings, rubber stators, eccentric screws. During the inspection, the user can turn on the pump to see if the bearing is complete and if the rotor is stuck with something. At the same time, check whether there is any residual media condensation that prevents the wire rod from being driven, and whether the rubber stator has been damaged due to unexpected working conditions. If a damaged part is found, it should be replaced with a new one in time. If clogging is a problem, hot water or solvents can be used for cleaning and unclogging.
3. The motor and screw pump body do not rotate.
When the motor and screw pump body are not rotating, it is first necessary to check whether the installation meets the relevant specifications to prevent damage to the characteristics caused by improper installation parts or pipeline layout. The key is to check that the motor is original and has not been altered, and to confirm that the power supply is cut off. Before starting the motor, it is important to ensure that the power supply is cut off, and then perform the inspection of the starting motor. Conducting such an inspection before start-up ensures safety and prevents potential damage.
In addition to the common faults mentioned above, there are other problems that can occur during the use of progressive cavity pumps. In order to ensure the normal operation and prolong the service life of the equipment, the user should regularly maintain and maintain the equipment. It is recommended to follow the guidelines provided by the equipment manufacturer, including regular oil changes, inspection of seals and fasteners, etc. In addition, keeping the environment around the equipment clean and avoiding debris and garbage from entering the pump chamber is also one of the important measures to prevent failures.
In summary, progressive cavity pump is a reliable conveying device, but various failures may occur during use. Users should understand the causes and solutions of these failures, and carry out regular maintenance and maintenance of the equipment. With proper maintenance and use, the long-term stable operation of the progressive cavity pump can be ensured and its service life prolonged. At the same time, seeking professional help in time when encountering problems is also an important guarantee to ensure the normal operation of the equipment.