What external factors cause common failures in plunger pumps?

What external factors cause common failures in plunger pumps?

PV046R1K1T1NMMW piston pump: gas has entered the pump.

It is quite common for gas to enter the pump. During operation of a Parker plunger pump, any clearances between components in the hydraulic system can allow gas to dissolve into the oil and be carried into the pump, thereby forming air bubbles. If the bubble formation is severe, the oil may emulsify and become sludgy, leading to blockage and, over time, abnormal pump operation.

Consequently, when air enters the pump, it can cause severe impact, thereby reducing the service life of the plunger pump. Therefore, components of the hydraulic transmission system should be regularly maintained to prevent air from entering the system and to avoid damage to hydraulic components.

PV046R1K1T1NMMW plunger pump oil stains and gear oil environmental contamination

Gear oil is the primary fluid in hydraulic transmission systems; if it becomes contaminated and is not promptly cleaned, it can damage hydraulic components. In addition, since hydraulic transmission systems operate under friction, minute mechanical particles inevitably enter the oil from each component, accelerating wear on the piston pump’s internal parts and thereby significantly reducing the pump’s service life.

There are three key reasons for environmental pollution caused by plunger pumps:

(1) The external surfaces of the plunger pump are not cleaned thoroughly. A detailed or incomplete skeleton seal provides an easy pathway for contaminants to enter the plunger pump.

(2) The internal structure of the plunger pump has not been cleaned, and a small amount of contaminant remains in the oil reservoir. If this minor contamination is not removed, it will contaminate the environment and dissolve into the newly added finished oil, thereby jeopardizing the normal operation of the plunger pump.

(3) During refueling of the plunger pump, if the dedicated tools used—such as the fueling pump—are not thoroughly cleaned, contaminants can easily be introduced into the hydraulic pump. Once these contaminants enter the plunger pump’s hydraulic fluid, the particulate matter, carried along by the fluid flow, can cause severe damage to each component of the pump, leading to blockage and failure of the hydraulic pump and its components.

Plunger Pump Overheating

Plunger pumps must not be operated in ambient temperatures exceeding 60°C, as this results in excessively high residual oil content during operation. If the temperature is too high, the hydraulic fluid in the pump will undergo oxidative degradation, leading to a reduction in viscosity and, consequently, a decline in the pump’s efficiency.

Damage to Plunger Pumps

After prolonged operation, the internal components of a plunger pump undergo slight wear, and certain parts gradually deteriorate over time, thereby compromising normal operation and the pump’s performance.

After damage, the appearance changes, such as a reduction in dimensions and displacement of the components. Adjusting the dimensional specifications and repositioning these components will alter the structural parameters of the plunger pump.

At this point, the situation is that the operation of a plunger pump is determined by its design parameters. If these design parameters are not promptly adjusted, the pump’s operational efficiency will be compromised.

The primary factors that cause sustained high temperatures in plunger pumps are as follows:

The oil in the plunger pump becomes mixed with a certain amount of air or water. When the plunger pump converts the oil into gear oil, it is reasonable for air and water to be mixed in. This will significantly increase the heat generation of the hydraulic transmission system.

If too much oil is added, the oil level in the reservoir will rise. In this case, excessive churning of the oil will reduce the effective volume of the reservoir, impair heat dissipation, and raise the operating temperature of the plunger pump.

Parker piston pumps are the primary machinery in hydraulic transmission systems. By means of the reciprocating motion of the pistons within the pump cylinder, the volume of the sealed working chamber is periodically altered, thereby achieving oil suction and pressure boosting.

Parker piston pumps, with their high working pressure, compact design, and high efficiency, are widely used in applications requiring high pressure, large flow rates, and variable flow control, such as four-column hydraulic presses, construction machinery, and marine equipment.

A Parker plunger pump is a type of reciprocating pump and falls under the category of positive-displacement pumps. The plunger is driven by axial force transmitted from the pump shaft. During its reciprocating motion, both the suction and discharge processes are controlled by throttling valves. When the plunger moves outward, the pressure within the working chamber decreases, causing the inlet valve to close; as the chamber pressure drops below the line pressure, the outlet valve opens, allowing fluid to enter the working chamber. Conversely, when the plunger is pushed inward, the pressure in the working chamber rises, closing the outlet valve and opening the discharge valve, thereby enabling fluid to flow out.