Parker double gear pump, triple gear pump

Core analysis of Parker double gear pump and triple gear pump

1. Double gear pump: a stable choice under high pressure conditions
   Structural features
   Dual-pump parallel design: it is composed of a combination of two GP series gear pumps, which supports shared inlet or separate oil inlet, and the flow rate is superimposed to improve the efficiency of the system.
   Modular configuration: provide 5 shell sizes (such as PGP502/503/505/511/517）， The displacement range is 0.8-52ml/r, and the speed is 500-4000r/min, which is suitable for different working conditions.
   Lightweight design: die-cast aluminum housing reduces weight while ensuring structural strength, suitable for mobile devices or space-restricted scenes.
   Performance advantage
   High-pressure carrying capacity: continuous working pressure up to 275bar, peak pressure 270bar, the use of high-strength materials and large shaft diameter design, reduce bearing load, adapt to extreme working conditions.
   Low-noise operation: By optimizing the number of gear teeth (such as PGP503 is 9 teeth, PGP511 is 12 teeth) and the distribution structure, the pressure pulsation is reduced by 30%, and the noise level is better than the industry standard 5-8dB.
   High efficiency performance: The pressure-balanced floating bushing structure reduces internal leakage, the volumetric efficiency is 93%-98%, and the energy loss is reduced by 15%-20%.
   Typical application scenarios
   Construction machinery: it provides a stable power source for the hydraulic system of excavators and loaders, and supports the synchronous action of multiple actuators.
   Injection molding machinery: In the process of high-pressure injection molding, ensure the accurate measurement and transportation of molten plastic and improve product quality.
   Metallurgical industry: It is used in the hydraulic transmission system of blast furnaces and continuous casters to withstand harsh environments such as high temperature and dust.
2. Triple gear pump: integrated solution for complex systems
   Structural features
   Three-pump integrated design: the three gear pumps are integrated in a single housing, sharing the drive shaft, reducing the installation space and pipeline connection, and the system simplification is increased by 40%.
   Flexible displacement combination: support mixed configurations of different displacement pumps (such as PGP503+PGP511+PGP517) to meet the needs of multi-loop differentiated flow.
   Enhanced sealing technology: The hydrostatic gap is used to compensate for the sealing of the pressure area of the end face, and the leakage volume is reduced to less than 0.5ml/min to adapt to high-pressure working conditions.
   Performance advantage
   Ultra-high pressure performance: Some models (such as PGP620 series) have an operating pressure of 275bar and a peak pressure of 315bar, which is suitable for heavy-duty equipment such as hydraulic presses and die-casting machines.
   Fast dynamic response: the torque transfer efficiency of the drive shaft is as high as 98%, and the start-up time is shortened to 0.2 seconds to meet the needs of fast action.
   Long-life design: The gears and bearings are made of high-wear-resistant alloy materials, and the lubrication system is optimized. The MTBF (average trouble-free time) exceeds 20,000 hours.
   Typical application scenarios
   Ship power system: provide multiple independent hydraulic sources for steering gear, anchor gear, etc. to ensure navigation safety.
   Aerospace: In aircraft landing gear retraction, flap control and other systems, high-precision and high-reliability hydraulic drive is realized.
   Energy equipment: it is used for wind power pitch system and nuclear power valve control to withstand extreme temperatures and radiation environments.
3. the comparison and selection guide of double and triple pumps
   Parameter double gear pump triple gear pump
   Flow range 0.8-104ml/rev (two pumps superimposed) 1.2-156ml/rev (three pumps superimposed)
   Pressure level 275bar (peak 270bar) 315bar (peak 350bar)
   Installation space is reduced by 30%, pipeline connection is reduced by 50%, pipeline connection is reduced, and the degree of integration is higher
   Cost-effective and cost-effective, suitable for medium-complex systems with high initial investment, but low long-term maintenance costs 25%
   Recommended scenarios construction machinery, injection molding machines, metallurgical equipment, ships, aerospace, energy equipment
4. Selection suggestions and precautions
   Pressure matching: Select the rated pressure of the pump according to the maximum pressure of the system, and reserve a 20% safety margin.
   Flow calculation: Summarize the required flow of all actuators and consider the leakage coefficient (usually 1.1-1.3).
   Media compatibility: Confirm the compatibility of pump body materials (such as aluminum alloy, cast iron) and hydraulic oils (mineral oils, synthetic oils).
   Environmental adaptability: In high temperature or corrosive environments, high temperature resistant seals and coating treatment models are preferred.
   Supplier support: Choose suppliers who provide customized services (such as special ports and shaft extension types) to shorten the commissioning cycle.