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Introduction
A plunger type positive displacement pump, sometimes known as a piston pump, is one of the most common types of fluid power pump, used in many industrial and agricultural applications. Most of these pumps are designed for continuous operation and efficient transfer of liquids from one point to another point. The plunger type pump is driven by a heavy-duty motor and a plunger is driven by the motor, forcing working medium enter the cylinder, compression it, and the discharging it out of the pump system. These pumps are reliable and efficient, but their operating lifespan is largely dependent on their lubrication and operating conditions.
The plunger type positive displacement pump is subject to wear. The piston, the cylinder, and the other components of the pump must bear considerable pressure and changing temperature. These components may wear down over time and decrease in efficiency. In addition, if the lubrication system fails, adequate lubrication may not be provided, leading to rapidly accelerated wear on the components and a reduction in pump efficiency.
Therefore, it is important for operators of plunger type pumps to identify and repair the pump in a timely manner in order to extend the operating life of the equipment and maintain efficiency. This paper explores the wear characteristics, identification, and repair of plunger type pump.
Wear Characteristics
When plunger pumps are not properly lubricated, the wear rate is accelerated. This accelerated wear can be identified by several characteristics, including ripples on the pump plunger, increased friction on the plunger, abnormally high temperatures, excessive vibration, and abnormal noises.
In addition, wear on the pump walls may cause small grooves or marks and lead to pump leakage as the plunger moves over them. The wear on the walls can also cause further wear on the plunger. When worn, the plunger will not be able to move as efficiently and will increase system pressure and lower efficiency.
Identification
Identifying wear in plunger type pump requires careful examination of the equipment. To facilitate this examination, check the following characteristics:
• Check the plunger for any unusual markings or ripples.
• Check for increased friction or resistance of the plunger.
• Check for any abnormal noise or vibration.
• Check for any abnormal heat or temperature in the system.
• Check for leakage or grooves in the walls of the pump.
Repair
Repair of a plunger type pump depends on its severity. In cases where wear is minimal, it may be possible to extend the life of the pump by lubricating the plunger and the cylinder walls. If the wear is more significant, the pump may need to be disassembled and devices replaced.
Conclusions
Plunger type positive displacement pumps are widely used to efficiently transfer liquids from one point to another in many industrial and agricultural applications. However, this type of pump is subject to wear and requires periodic maintenance to ensure proper operation and extend the life of the equipment. Careful examination and preventive maintenance can help identify where wear has occurred, allowing pump operators to take action to repair the pump and reduce the cost of operations.
