Vickers PVQ Series Hydraulic Pump
I. Basic Design Features
• Operating Principle: The PVQ series hydraulic pumps employ an in-line variable displacement design, achieving liquid suction and discharge through the reciprocating motion of pistons within cylinders. The piston motion is parallel to the driveshaft, resulting in a compact and space-saving pump structure.
• Variable Displacement Control: These pumps rely on pressure and/or flow compensators to control displacement, automatically adjusting the output volume according to system demands for energy efficiency and optimal performance.
• Through-Shaft Drive: The PVQ series offers through-shaft drive solutions, allowing for the integration of various types and sizes of fixed and variable displacement pumps. This creates compact and adaptable assemblies, reducing installation costs and overall system dimensions.
II. Performance Parameters
• Displacement Range: The PVQ series provides a wide range of displacement options, typically from 10 cc/rev (0.61 in³/rev) to 280 cc/rev (17.09 in³/rev), with specific models offering different displacement values.
• Rated Pressure: Usually rated at 280 bar (4060 psi), with some models reaching up to 350 bar (5075 psi).
• Speed Range: Typically operates between 600 rpm and 2500 rpm, with some models capable of reaching 3000 rpm. The recommended speed range is 1200 rpm to 1800 rpm for optimal performance and longevity.
• Power Range: Depending on displacement and pressure, the power range can span from a few kilowatts to over a hundred kilowatts.
III. Control Methods
• Manual Control: Adjusts the swashplate angle manually to change displacement.
• Pressure Compensation Control: Automatically regulates displacement based on system pressure to maintain constant pressure.
• Load-Sensing Control: Adjusts displacement according to load requirements, enhancing system efficiency.
• Remote Control: Enables displacement adjustment via external signals (e.g., electrical or hydraulic signals).
• Proportional Control: Provides continuous and precise displacement regulation.
IV. Application Fields
• Industrial Equipment: Such as machine tools, injection molding machines, and die-casting machines, requiring high-pressure and large-flow hydraulic systems.
• Mobile Equipment: Including construction machinery and marine vessels, where compactness and weight are critical.
• Other Fields: Such as chemical, petroleum, and metallurgical industries, demanding precise flow and pressure control.
V. Advantages and Characteristics
• Low Noise: The PVQ series operates with exceptionally low noise levels, meeting the stringent requirements of modern industrial conditions. The noise level of each pump is close to or lower than that of the motor driving it.
• Long Service Life: The durability and longevity of these pumps rival the best industrial products available on the market today.
• Adaptability to Various Hydraulic Fluids: In addition to typical petroleum-based and synthetic hydraulic fluids, the PVQ series can also accommodate water-containing and phosphate ester hydraulic fluids.
• Installation Flexibility: Offers multiple installation options, including flange and foot mountings, to suit different needs.
VI. Models and Configurations
• Model Naming Convention: The model numbers of Vickers PVQ series axial piston pumps typically include the following information: PVQ (series identifier), displacement (in cc/rev), control method (e.g., B for pressure compensation, C for load-sensing, E for electro-proportional), rotation direction (e.g., R for clockwise, L for counterclockwise), etc.
• Common Models: Such as PVQ5, PVQ10, PVQ13, PVQ20, PVQ25, PVQ29, PVQ32, PVQ40, PVQ45, and models with different control methods and suffix codes, e.g., PVQ20-B2R-SE1S-21-C21-12.
