Six Things Needs Attention in Gear Pump Inspection

With the increase of the application time, the gear pump will suffer from a series of shortcomings such as the lack of pump oil and even no oil, mainly due to the excessive wear of the relevant parts. Driveshafts and bushings, forced gear center holes and pintles, pump housing cavities and gears, gear end surfaces and pump covers are the primary wear locations for gear pumps. When the primary technical guideline of the lubricant pump is worn out and it does not meet the demand, it should be disassembled and disassembled to find out the specific wear location and level, and try to correct it.

First, open <br> <br> before opening should do plenty of preparation work to understand the equipment layout, process, operating conditions; should be open carefully to prevent damage to the device components.

Second, review the data

For the cooperation of all parts of the gear pump, all inspections should be done. For the specification of some gaps, see Table 1—1.

Third, the view of the removed parts <br> <br> specific view of gears for color view, does not allow cracks; cone of the journal qualified, not the appearance of scratches, the maximum allowable roughness Ra The value is 1.6 μm; end caps, brackets, and pump body must not have significant disadvantages.

Fourth, amend or replace <br> <br> shall be replaced cost overrun parts, spare parts for the need correction, after correction should fit specifications.

Fifth, the assembly and adjustment <br> <br> gear face the end cap, axial recess carrier, relying on the thickness of the gasket between the cap changes, with the pump to adjust the bracket; fastening cap bolts At the same time, the symmetry force is even and uniform. When the rotor rotates, the rotor should be loosened. When packing or oil seal is added, the rotor must be tightly pressed while the cover is closed. To die.

Six test <br> <br> pressure test of 1.5 times the working pressure, insisted 5min does not leak, test running time, no leakage, running sound normal, no abnormal oscillation, the outlet pressure fit the needs for qualified.