- Variable double pump with two axial conical piston drives in bent-axis design for hydrostatic drives in open circuit - The flow rate is proportional to the drive speed and the displacement volume and can be continuously adjusted from qV max to qV min = 0
Adjustable - The pump is suitable for direct attachment to the flywheel housing of the diesel engine - A common suction connection for both circuits and auxiliary pump - A comprehensive range of adjusting devices is available for different control and regulation functions - Individual power controller - Integrated auxiliary pump with pressure relief valve, optionally with additional pressure reducing valve - Power take-off variants for mounting axial piston and
A8VO140 Axial Piston Variable Pump
I. Product Overview
The A8VO140 is an axial piston variable pump manufactured by Rexroth, belonging to the A8VO series. It adopts a swashplate design and regulates the pump's displacement by changing the swashplate angle, thereby achieving continuous control of the flow rate. This pump is suitable for hydrostatic drive systems in open circuits and is widely used in fields such as construction machinery, agricultural machinery, and marine applications.
II. Technical Parameters
• Displacement: 140 cm³/rev (displacement of 140 cubic centimeters per revolution). This is the volume of hydraulic oil that the pump can discharge per unit of rotation angle. A larger displacement means that a greater flow rate can be provided at the same rotational speed.
• Maximum Pressure: Generally, pumps in this series can achieve relatively high operating pressures, with specific values slightly varying depending on the model and configuration. Generally, the maximum pressure can reach 350 - 420 bar. The high pressure enables the pump to provide sufficient power for the hydraulic system to drive the actuators to complete various high-load tasks.
• Speed Range: It allows a relatively wide speed range, typically operating between 600 - 3000 rpm. Different speeds affect the pump's flow output. A higher speed results in a larger flow rate, but issues such as heat dissipation and wear of the pump also need to be considered.
III. Structural Features
• Swashplate Design: By changing the angle between the swashplate and the cylinder block axis (i.e., the swashplate angle), the stroke of the pistons within the cylinder block is altered, thus adjusting the pump's displacement. This design is compact and offers flexible regulation, enabling continuous stepless adjustment of the flow rate.
• Axial Piston Structure: The pistons reciprocate along the axis of the cylinder block, cooperating with the swashplate and the valve plate to complete the oil suction and discharge processes. The axial piston structure boasts high volumetric and mechanical efficiencies, providing stable and reliable hydraulic power.
• Integrated Auxiliary Pump: Some models may be equipped with an integrated auxiliary pump to provide additional oil supply for the system, meeting the requirements of special working conditions. The auxiliary pump is usually equipped with a pressure regulating device to ensure stable output pressure.
• Multiple Adjustment Methods: Offers a variety of adjustment device options, such as manual, electric, and hydraulic adjustments, which can be selected according to different application scenarios and control requirements. For example, in some simple working conditions, the manual adjustment method is convenient and cost-effective; while in highly automated systems, electric or hydraulic adjustment methods enable more precise flow control.
III. Structural Features
• Swashplate Design: By changing the angle between the swashplate and the cylinder block axis to adjust the piston stroke in the cylinder block, thus regulating the pump's displacement. This design is compact and flexible in regulation, enabling continuous stepless adjustment of the flow rate.
• Integrated Auxiliary Pump: Some models may integrate an auxiliary pump to provide additional oil supply for the system, meeting special working condition requirements. The auxiliary pump is usually equipped with a pressure regulating device to ensure stable output pressure.
• Multiple Regulation Methods: Various regulation device options are available, such as manual, electric, and hydraulic regulation, which can be selected according to different application scenarios and control requirements.
III. Structural Features
• Swashplate Design: By changing the angle between the swashplate and the cylinder block axis (i.e., the swashplate angle), the stroke of the pistons in the cylinder block is changed to regulate the pump's displacement. This design is compact in structure and flexible in regulation, enabling continuous stepless regulation of the flow rate.
• Axial Piston Structure: The pistons reciprocate along the axis of the cylinder block, cooperating with the swashplate and the valve plate to complete the oil suction and discharge processes. The axial piston structure features high volumetric and mechanical efficiency, providing stable and reliable hydraulic power.
• Multiple Regulation Methods: Various regulation device options are offered, such as manual, electric, and hydraulic regulation, which can be selected according to different application scenarios and control requirements. For example, in simple working conditions, manual regulation is convenient and cost-effective; in highly automated systems, electric or hydraulic regulation enables more precise flow control.
IV. Performance Advantages
• Adjustable Flow: It can continuously adjust the flow output according to the actual needs of the system, thereby achieving precise control over the speed of actuators. This feature allows equipment to operate efficiently under different working conditions and improve production efficiency.
• Energy-efficient: By reasonably adjusting the displacement to avoid unnecessary energy consumption, the pump can reduce power loss in the hydraulic system and save energy during light-load operation.
• High Reliability: Made of high-quality materials and advanced manufacturing processes, it has good wear resistance and corrosion resistance. Its reasonable structural design can effectively reduce internal leakage and improve the pump's service life and reliability.
• Strong Adaptability: It can operate stably within a wide range of pressure, speed, and temperature, adapting to various harsh working environments. Whether in high-temperature, low-temperature, or high-humidity conditions, it can ensure the normal operation of the hydraulic system.
III. Application Fields
• Construction Machinery: Such as excavators, loaders, and cranes. In excavators, the A8VO140 pump provides power for hydraulic cylinders and motors, enabling precise control of digging, slewing, and traveling motions. In loaders, it drives the lifting and tilting of the bucket, improving loading efficiency.
• Agricultural Machinery: Such as combines and tractors. In combines, the pump provides hydraulic power for the header, threshing unit, etc., ensuring the smooth progress of the harvesting process. In tractors, it is used to control the suspension device and hydraulic outputs, meeting the needs of different agricultural tool operations.
Additionally, the pump's flow - adjustability allows for precise speed control of actuators through reasonable displacement regulation, avoiding unnecessary energy consumption. For instance, in light - load operations, reducing displacement lowers power loss in the hydraulic system, enhancing energy efficiency.
IV. Application Fields
• Construction Machinery: Such as excavators, loaders, and cranes. In excavators, the A8VO140 pump provides hydraulic power for cylinders and motors, enabling precise control of digging, slewing, and traveling motions. In loaders, it drives the lifting and tilting of the bucket, improving loading efficiency.
• Agricultural Machinery: Such as combines and tractors. In combines, the pump provides hydraulic power for the header, threshing unit, etc., ensuring smooth harvesting. In tractors, it controls the lifting and tilting of implements, meeting various farming operation requirements.
• Marine Applications: Can be used in ship steering systems and deck machinery. It provides stable hydraulic power for the steering gear, ensuring safe navigation. It also drives cranes and winches on the deck, enhancing the ship's operational capabilities.
