Parker piston pump 6505761 DD173 in stock

Brand

PARKER/American Parker

Application Areas

Chemical, Petroleum, Mining, Road/Rail/Marine, General

Parker piston pumps are a type of reciprocating pump, belonging to the category of volumetric pumps. The pistons are driven by the eccentric rotation of the pump shaft, resulting in a reciprocating motion. Both the suction and discharge valves are one-way valves. When the piston is pulled outward, the pressure in the working chamber decreases, the outlet valve closes, and when the pressure is lower than the inlet pressure, the inlet valve opens, allowing liquid to enter. When the piston is pushed inward, the pressure in the working chamber increases, the inlet valve closes, and when the pressure is higher than the outlet pressure, the outlet valve opens, allowing liquid to exit. When the drive shaft drives the cylinder block to rotate, the swashplate pulls the piston out of or pushes it back into the cylinder block, completing the suction and discharge process. The oil in the working chamber formed by the piston and cylinder bore communicates with the pump's suction and discharge chambers through a distribution plate. A variable displacement mechanism is used to change the swashplate angle; adjusting the swashplate angle changes the pump's displacement.

Parker piston pumps operate by utilizing the volume change generated by the reciprocating motion of a piston parallel to the drive shaft within the piston bore. Because both the plunger and plunger bore are circular parts, high precision fitting can be achieved during machining, resulting in advantages such as high volumetric efficiency, smooth operation, good flow uniformity, low noise, and high working pressure. However, they are more sensitive to hydraulic oil contamination, have a more complex structure, and are more expensive.

Parker plunger pumps generally employ a rotating cylinder block and end-face distribution design. A friction pair consisting of a bimetallic plate and a steel distributor plate is inlaid on the cylinder block end face, and most use a planar distribution method, making maintenance relatively convenient. The distributor plate is one of the key components of the axial plunger pump. During pump operation, on one hand, the high-pressure oil in the working chamber pushes the cylinder block towards the distributor plate; on the other hand, the oil film pressure between the distributor plate and the cylinder block creates a hydraulic counterforce on the cylinder block, causing the cylinder block to move away from the distributor plate. The hydraulic clamping force Fn of the cylinder block against the distributor plate is designed to be slightly greater than the hydraulic counterforce Ff of the distributor plate against the cylinder block, i.e., Fn/Ff = 1.05~1.1, ensuring normal pump operation and maintaining high volumetric efficiency.

The main causes of oil leakage in Parker plunger pumps are as follows:

(1) Damaged spindle oil seal or defects/scratches on the shaft;

(2) Excessive internal leakage, causing increased pressure at the oil seal, which damages or blows it out;

(3) The drain pipe is too thin or too long, causing leakage at the seal;

(4) Loose external oil pipes, damaged pipe joints, aged or cracked gaskets;

(5) Loose bolts in the variable displacement adjustment mechanism, resulting in a damaged seal;

(6) Sand holes or poor welding in the cast iron pump casing. PARKERPV032R1K1AYNMTP

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PARKERD3FBE02SC0NF00 Our company primarily deals with European and American brands, and can source brands from any European country. For example, our key German brands include: FESTO, BURKERT, BOSCH-REXROTH, IFM, TURCK, P+F, BALLUFF, SICK, HIRSCHMAN, MURR, HYDAC, GSR, CROUZET, E+H, PILZ, HAWE, SIEMENS, STAUFF, EUCHNER, EMG, UNIVER, ATOS, NORGREN, and approximately 500 other European brands of varying sizes. We have cooperative relationships with approximately 500 other European brands.

We also have companies in the US, and we cooperate with approximately 200 brands, including ASCO, Vickers, MAC, Parker, MOOG, Fairchild, Denison, Ross, UE, MTS, and GEFRAN.

We have distribution rights for Japanese brands, such as CKD, TOYOOKI, NACHI, DAIKIN, SMC, KOGANEI, TACO, NOK, and TOKIMEC.