As a precision fluid conveying equipment, the maintenance of gear metering pumps directly affects the operational stability and service life of the equipment. The following elaborates on the maintenance points and implementation details from multiple dimensions:
1、 Refined management of lubrication system
Lubrication is the core link in reducing the wear of transmission components. The manufacturer's recommended lubricant type should be selected based on the equipment model and operating conditions. Under normal circumstances, lubricating oil should be replenished every 3 months, but in high temperature, high humidity, or corrosive environments, it should be shortened to 1-2 months. Before oil injection, clean the oil injection hole to avoid impurities from entering the oil circuit.
2、 Cleaning, maintenance, and anti clogging strategies
Residual drugs, crystallization, or accumulation of impurities are the main causes of pump body failure. Suggest taking the following measures:
Valve and pipeline cleaning: Disassemble the valve components every 3 months (high crystallinity agents need to be cleaned monthly), and rinse the internal channels with clean water or specialized diluents.
Cleaning of pump body surface and interior: After shutdown, remove the dust on the surface of the pump body, focusing on cleaning the sediment around the diaphragm and seals to prevent impurities from affecting the sealing performance.
Filter system maintenance: The Y-shaped filter or pulse damper should be disassembled and cleaned regularly to prevent impurities from entering the pump chamber and exacerbating wear.
3、 Inspection and replacement standards for key components
The condition of seals and transmission components directly determines the accuracy and lifespan of the pump
Seal inspection: Check the O-ring and seal ring monthly for aging, deformation, or cracking, and replace them immediately if any damage is found.
Gear and bearing monitoring: Regularly check whether there are cracks or broken teeth on the gear meshing surface, and whether the bearing clearance exceeds the allowable range.
4、 Operating standards and operational protection
Improper operation is the main cause of equipment failure, and the following principles must be strictly followed:
Start stop specification: Before starting, ensure that the inlet pipeline is filled with liquid to avoid dry operation; When shutting down, first turn off the power and then drain the residual liquid in the pump chamber to prevent the medium from crystallizing or corroding.
Idle protection: If the device does not have automatic idle protection function, manual monitoring or installation of liquid sensors is required to ensure that the pump chamber is always filled with medium.
Parameter monitoring: Daily recording of import and export pressure, flow rate, and temperature data. Abnormal fluctuations may indicate insufficient lubrication or component wear.
5、 Periodic calibration and performance verification
The flow and pressure accuracy of the metering pump will gradually shift with use and need to be calibrated regularly:
Calibration cycle: Perform flow and pressure calibration every 6 months, monitor output values using standard instruments, and adjust pump head or drive parameters if deviation exceeds 5%.
Calibration method: By adjusting the stroke of the eccentric wheel or stepper motor to change the displacement of the plunger, combined with calibration method to correct the error, ensure that the measurement error is ≤± 0.5%.
The maintenance of gear metering pumps requires the establishment of a management system that prioritizes prevention and planned maintenance. Personalized maintenance plans should be developed in conjunction with equipment manuals, and complete records should be kept for traceability and analysis. For complex faults, it is necessary to promptly contact the manufacturer's technical support to avoid blind disassembly and secondary damage.