With the rapid development of urban infrastructure in China, liquid-ring vacuum pumps have been adopted in many sectors due to their numerous advantages. To ensure their optimal use, let us now examine the key inspection points for partial maintenance of liquid-ring vacuum pumps.

Partial maintenance of liquid-ring vacuum pumps is generally carried out in a planned manner during operational downtime or the winter maintenance period. This maintenance primarily involves the inspection and treatment of the copper sleeve and oil sleeve of the pump regulator. Inspection of the vacuum pump guide bearings. The wear of rubber bearings, water leakage and journal wear must be inspected, recorded and addressed. Most oil guide bearings are made of Babbitt alloy steel; being soft, they are prone to wear. If the sealing is ineffective, water may enter the oil sump during shutdown, leading to the accumulation of silt and sand, which in turn causes wear to the bearings and journal during operation. In particular, carbon steel journal shafts that have not been spray-coated or lined with stainless steel should be inspected and treated regularly to assess their corrosion and wear. Inspect and test thermometers, instruments and relay protection devices; take samples from the upper and lower guide bearing oil grooves and the turbine oil for analysis.

Inspect the clearances and surfaces of the water-ring vacuum pump bearing shells. Based on the temperatures indicated by the thermometers during operation, carry out targeted inspections of the bearing shell clearances and shaft surfaces; inspect and address the braking system; and check whether fasteners in various parts of the unit, such as anchor bolts, shaft keys and locating pins, are loose. Carry out a visual inspection of the oil cooler and conduct a water test to check for any leaks. Inspect the impeller, blades and impeller casing for cavitation and abrasion caused by silt and sand, measure and record the extent of such damage, and measure the clearance between the blades and the impeller casing.

The above outlines the key inspection points for the partial overhaul of water-ring vacuum pumps. Optimal performance can only be achieved through high-quality products and correct operating procedures. Should you have any queries, please do not hesitate to contact us; we will provide you with sound advice to help you avoid losses caused by improper operation.