Vane Pump DENISON P6W-2R1B-C00-00 Hydraulic Oil Pump Plunger Pump

Denison plunger pump is powered by an electric motor, which drives the reducer to rotate through a drum gear coupling. The speed reducer decelerates and drives the crankshaft to rotate. By means of a crank connecting rod mechanism, the rotary motion is converted into a reciprocating motion for the crosshead and plunger. When the plunger moves backward to the dead center, the pump volume cavity gradually increases, and the pressure in the pump cavity decreases. When the pump cavity pressure is lower than the inlet pressure, the suction valve opens under the pressure at the inlet end, and the liquid is sucked in; When the plunger moves forward to the dead center, the pressure in the pump chamber increases. At this time, the suction valve is closed, and the discharge valve is opened. The liquid is squeezed out of the hydraulic cylinder, achieving the purpose of suction and discharge. The sliding friction between the sliding shoe and the swash plate of the Denison plunger pump is a complex pair of three pairs of friction pairs in the swash plate plunger pump

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The high-pressure oil in the Dennison plunger cavity will leak out from the gap between the plunger ball head and the sliding shoe, causing the oil film between the sliding shoe and the swash plate to become thinner. In severe cases, it can cause the hydrostatic bearing to fail, causing metal contact friction between the sliding shoe and the swash plate, causing the sliding shoe to burn and fall off, and causing the plunger ball head to scratch the swash plate. When the plunger rod ball head and sliding shoe ball socket exceed the tolerance by 1.5 times, they must be replaced in groups.
After a period of action of the swash plate, the surface of the swash plate may appear concave. Before using platform grinding, the original size and plane hardness should be measured first. After grinding, measure the grinding amount. If it is within 0.18, it will not hinder the use of the plunger pump; If it exceeds 0.2 mm or more, nitriding should be used to maintain the original nitriding layer thickness.
When the plane of the swash plate is scraped out of the groove by the plunger ball head, the method of laser cladding alloy powder can be used to repair it. Laser cladding technology can not only ensure the bonding strength of the material, but also ensure the hardness of the remelted material, without completely reducing the hardness of the surrounding tissue. It is also advisable to use chromium phase welding rods for manual surfacing, and the repaired swash plate surface needs to be re heat treated using a nitriding furnace for heat treatment. Regardless of the method used to repair the swash plate, it is necessary to restore the original dimensional accuracy, hardness, and surface roughness.