The common faults of high-pressure plunger pumps
When a high pressure socket pump fails, the most common problems include inability to start (stuck), insufficient flow, abnormal pressure, violent vibration, oil and gas leakage, and overheating. Based on the available information, the most likely causes of failure are concentrated in poor lubrication, wear or stalling of parts, oil contamination, improper assembly, and piping system problems. The following is a systematic compendium of specific removal methods:
I. Detecting and treating the inability of the pump to turn (stuck)
This is a common and urgent problem with high pressure piston pumps and is usually caused by the following reasons:
The cylinder and the cylinder hole were stuck
Cause: The oil is too dirty, the oil temperature is too high, causing adhesion, or the oil is too viscous at low temperatures.
Procedure for removal: replace clean hydraulic oil; Switch to a low viscosity oil at low temperatures; Disassemble and grind the coated surface when necessary.
The slipper falls off or the of the plug breaks
Cause: The cylinder was forced to start after death, causing the machine to tear or twist.
Procedure for removal: replace damaged parts and ensure load-free start when reassembly.
3. The variable body is stuck
Cause: Control oil blockage, servo piston sluggishness, or oil contamination.
Procedures for removal: Cleaning the oil pipeline, purifying the oil, grinding the moving parts or replacing the spring.
II. There is insufficient flow or no oil
Such problems affect the efficiency of the system's fluid supply and need to be investigated in terms of both oil absorption and internal leakage:
I don't suck the oil well
This is characterized by insufficient intake, possibly due to excessive resistance of the oil intake pipe, blockage of the filter or low oil level.
Troubleshooting: Check and clean the filter to ensure that the tank liquid surface is sufficient, optimize the piping layout to reduce bends.
The internal leakage was serious.
Cause: The gap between the cylinder and the flow plate is too large, the seal is aging or the central spring is broken.
Procedure for removal: polish the contact surface, replace the seal or spring, and restore the sealing performance.
The variable body does not meet the set value
Check whether the variable piston is flexible, adjust the error, and make sure the inclination is correct to meet the flow requirements.
III. The output pressure is abnormal (low or fluctuating)
The pressure problem is a key indicator of the stable operation of the system:
High pressure filter blockage or sidevalve blockage
It will cause insufficient lead pressure and affect pressure and discharge function.
Solution: Replace the filter, repair the bypass valve, and update the hydraulic oil to return the system pressure response to normal.
Seals are aging or connections are loose
It causes external leakage and reduces the effective output pressure.
How to handle it: tighten the screw connections and replace the oil seal gasket.
IV. Abnormal noise and violent vibration
Such phenomena often indicate mechanical imbalances or air pocket problems:
Bring air into the pump
Cause: The exhaust pipe is leaking, the tank level is too low or the viscosity of the oil is too high.
Remove method: remove air, check the sealing area, add enough oil, and select a suitable viscosity oil.
Pumps differ from motors
This leads to an increase in radial force, triggering vibration and wear.
Solution: Re-calibrate the pair to within the permissible error limit.
The rotor is imbalanced or the bearing worn
Check the condition of the crankshaft, replace worn bearings, and reinforce the plumbing scaffold.
V. Overheating and lubrication problems
Long-term high-temperature operation will accelerate the aging of components:
The oil level is too low or the license plate is not correct
In the flying lubrication system, the oil level is insufficient when it is below the lower limit, which is easy to trigger dry grinding of the shaft.
The specified grade of oil (such as CC15W / 40) must be used to avoid the viscosity is too high or too low to affect the formation of oil film.
The pump was not operated properly
After a long period of downtime, the pump is raised without a plate or empty load, which will cause short periods of lubrication to be insufficient.
The correct practice: Manually drive the truck before starting the pump, run it empty for more than 5 minutes (not less than 10 minutes in winter), then gradually increase the pressure.
VI. Daily maintenance advice
In order to prevent malfunctions from occurring, periodic inspection mechanisms should be established:
Periodically inspect oil level, oil temperature, pressure and noise changes;
Keep the oil fluid clean and replace the filter and hydraulic fluid regularly;
Shut down the equipment strictly in accordance with the operating procedures and avoid pressurized activation;
Strengthen critical joints to prevent oil spills from loosening.