The Rexroth A10VSO28 stands as a prime example of advanced hydraulic technology,representing a variable displacement axial piston pump designed for open-circuit applications.This versatile hydraulic piston pump is engineered to deliver exceptional performance,reliability,and efficiency in a wide range of industrial and mobile machinery.With its robust construction and intelligent control options,the A10VSO28 provides a compact and powerful solution for systems requiring precise flow and pressure control.Its design focuses on achieving a low operating noise level,a long service life,and short control response times,making it a preferred choice for engineers seeking to optimize hydraulic system performance.

  1.Product Overview and Technical Specifications

  The Rexroth A10VSO28 is an axial piston pump that operates on the swashplate principle,where a rotating cylinder block and pistons work against an adjustable swashplate angle to vary the pump's displacement and output flow.The key to its performance lies in this ability to seamlessly adjust the flow rate based on system demands,leading to significant energy savings.The pump is designed with a nominal displacement of 28 cm³per revolution.It can achieve a maximum flow rate of up to 42 liters per minute and is built to handle continuous operating pressures of up to 280 bar,with peak pressures reaching 350 bar.This makes it a robust component capable of sustaining high-power density in compact installations.The pump typically operates at a rotational speed of 1500 rpm and weighs approximately 17.8 kg,featuring a standardized ISO mounting flange and shaft for easy integration.

  2.Core Design Features and Technological Advantages

  The A10VSO28 hydraulic piston pump incorporates several design innovations that contribute to its superior performance in demanding environments.

  Excellent Suction Characteristics and Two Drain Ports:The pump is engineered for excellent suction characteristics,which enhances its performance and reliability,especially at higher operating speeds.It features two case drain ports,providing flexible options for housing leakage oil management and contributing to better cooling and contamination control.

  Robust Bearing and Driveshaft Design:A critical feature of this axial piston pump is its robust bearing system,which is designed to withstand substantial axial and radial loads from the external drive.This design eliminates the need for additional support bearings in many applications,simplifying system architecture and improving overall reliability.

  Low Noise Operation and Long Service Life:Through precision engineering and optimized fluid dynamics,the A10VSO28 operates at low noise levels,contributing to a more pleasant working environment.Furthermore,the use of high-quality materials and a hardened rotating group ensures a long service life,even under continuous operation in harsh conditions.

  Through-Drive Capability for Multi-Pump Systems:A significant advantage of this pump series is its optional through-drive capability.This allows a primary A10VSO28 pump to be coupled with additional auxiliary pumps(e.g.,gear or piston pumps)on the same driveline.This configuration enables the creation of multi-circuit hydraulic systems from a single power source,saving space and cost in complex machinery.

  3.Performance and Application Spectrum

  The technological prowess of the Rexroth A10VSO28 translates into tangible benefits across a wide array of industries.Its variable displacement nature allows it to deliver exactly the flow required by the system,minimizing energy losses associated with throttling and reducing heat generation.This high efficiency leads to lower operational costs and a reduced carbon footprint.The pump's quick control response times ensure that it can react almost instantaneously to changes in system demand,which is crucial for applications requiring high dynamic performance and precise control.

  The application range for this hydraulic piston pump is extensive.It is a common sight in industrial machinery such as plastic injection molding machines,metal stamping presses,and machine tools,where reliable high-pressure flow is essential.The mobile equipment sector heavily utilizes this pump in construction machinery like excavators and loaders,as well as in agricultural equipment,where its durability and variable flow capability are key to powering various hydraulic functions.Furthermore,its robustness makes it suitable for mining and forestry applications,where equipment must perform reliably in the most demanding and contamination-prone environments.

  Expanded Perspective:Selecting and Maintaining an Axial Piston Pump

  Understanding the broader context of pump technology and lifecycle management is crucial for maximizing the value of a component like the A10VSO28.

  1.Control Device Variants and Their Impact

  The A10VSO28 is not a one-size-fits-all product;its behavior is defined by the control device fitted to it.These controls dictate how the pump automatically adjusts its swashplate angle in response to system conditions.Common control options include the DR pressure compensator,which reduces pump displacement to a minimum when a preset system pressure is reached,thus holding pressure without consuming much power.The DFR/DFR1 control combines both pressure compensation and flow control(via a downstream orifice),regulating both parameters for precise control of actuator speed.Other options include LR power control,which adjusts displacement to maintain a constant product of pressure and flow(constant power),and HD hydraulic control for remote displacement adjustment.Selecting the correct control is as important as selecting the pump itself,as it directly determines the system's functionality,stability,and efficiency.

  2.Critical Maintenance for Long-Term Reliability

  The sophisticated internal components of an axial piston pump,with their fine tolerances,demand conscientious maintenance to achieve their designed service life.The single most important factor is fluid cleanliness.Maintaining the hydraulic oil to the recommended ISO cleanliness code is paramount,as abrasive particles can rapidly wear out the piston and slipper assemblies,the swashplate,and the valve plate,leading to a loss of efficiency and eventual failure.Regular oil analysis can help monitor the condition of the fluid and the pump internally.

  Furthermore,consistent fluid temperature and quality management is vital.Operating the hydraulic oil within its specified temperature range ensures that it maintains its proper viscosity and lubricating properties.The oil itself should be of the correct type and grade,and it must be changed periodically,as recommended by the manufacturer or based on oil analysis,typically around every 1000 to 3000 operating hours.Over time,the pump's bearings are also subject to wear.Monitoring for unusual noise or vibration can provide early warning of bearing failure,which,if left unaddressed,can lead to catastrophic damage to the pump.

  Frequently Asked Questions(FAQs)

  1.What is the primary functional difference between a fixed and variable displacement piston pump?

  A fixed displacement pump moves a set volume of fluid with each rotation,and its output flow can only be changed by altering the drive shaft speed.In contrast,a variable displacement pump like the A10VSO28 axial piston pump can physically change the volume it displaces per revolution(from 0 to a maximum of 28 cm³)via an internal swashplate mechanism.This allows the pump to vary its output flow on demand while running at a constant speed,making it vastly more energy-efficient for applications with varying flow requirements.

  2.Can the A10VSO28 pump be used with fire-resistant hydraulic fluids(HFC,HFD)?

  Yes,the A10VSO28 series is designed to be compatible with various hydraulic fluids,including standard mineral oils and many fire-resistant types like HFC(water-glycol)and HFD.However,it is critical to consult the official technical data sheet for the specific pump configuration,as the use of some fluids may require specific seal materials(such as FKM)and could potentially lead to a reduction in the pump's expected service life due to the different lubricating properties of these fluids.

  3.What does the"through-drive"capability mean for my hydraulic system design?

  The through-drive feature means that the pump's drive shaft is extended and mechanically robust enough to drive a second,auxiliary pump.This allows a system designer to power multiple hydraulic circuits—for example,a main circuit with the A10VSO28 and a steering or fan circuit with a gear pump—from a single engine or motor.This saves space,reduces complexity,and lowers the overall cost compared to using multiple independent drives.

  4.How critical is the case drain line connection for this pump?

  The case drain line is essential for the health of the pump.It allows internal leakage oil(which lubricates and cools the internal bearings and moving parts)to return to the tank at low pressure.A blocked or restricted case drain line will cause pressure to build up inside the pump's housing,which can blow out shaft seals,damage bearings,and lead to premature pump failure.The A10VSO28's two drain ports offer installation flexibility but must be piped correctly.

  5.What are the main control options available for this pump,and how do I choose?

  The A10VSO28 offers a wide range of controls,with common ones being DR(Pressure Control),DFR1(Pressure and Flow Control),and LR(Power Control).The choice depends entirely on the application's needs.Use a DR control for functions like clamping where you need to hold a set pressure.A DFR1 is ideal for simultaneously regulating pressure and the speed of an actuator.An LR control is best for applications with constant power input,like an engine-driven machine,to prevent the engine from stalling by reducing flow when pressure rises.