As the largest professional hydraulic component manufacturer in Japan, YUKEN has more than 50 years of experience in producing hydraulic equipment, enjoying a high reputation in the global machinery industry. Its hydraulic pump series, including variable piston pumps and vane pumps, are core products designed for various mechanical hydraulic systems, integrating high reliability, energy efficiency and strong adaptability. These pumps are widely compatible with international similar models, and can provide stable, efficient and cost-effective power transmission solutions for a variety of machinery, effectively meeting the high-demand working conditions of medium and high pressure, large flow and precise control in industrial production.

1. Core Structural Features

1.1 Variable Piston Pump

YUKEN variable piston pumps mainly adopt a swashplate-type axial structure, which is composed of key components such as cylinder block, plunger, swashplate, valve plate and variable mechanism. The variable mechanism controls the displacement of the pump by adjusting the angle of the swashplate through the variable piston and servo valve, realizing stepless speed regulation and flexible adaptation to different flow requirements of the hydraulic system. The plunger and cylinder block are processed by precision grinding technology, with high matching accuracy, which effectively reduces internal leakage and improves volumetric efficiency. Key components are made of high-strength alloy steel, after carburizing and quenching treatment, ensuring excellent wear resistance and impact resistance, and adapting to long-term high-intensity operation.

YUKEN variable piston pumps have a complete range of series and models, covering various displacement and pressure specifications to meet the diverse needs of different machinery. The main series and corresponding typical models are as follows:

1. A10 Series: As a small and medium-sized variable piston pump series, it is widely used in light industrial machinery and small hydraulic systems. Typical models include A10-16-FR01BS-10, A10-22-FR01CS-10, A10-31-FR01DS-10. The displacement range of this series is 16-31 ml/r, with a rated pressure of 21MPa and a maximum pressure of 28MPa, featuring compact structure and light weight.

2. A16 Series: It is a medium-sized variable piston pump with higher pressure resistance, suitable for medium-load hydraulic systems. Typical models include A16-40-FR01BS-10, A16-56-FR01CS-10, A16-70-FR01DS-10. The displacement range is 40-70 ml/r, the rated pressure is 21MPa, and the maximum pressure can reach 28MPa, with excellent operation stability and energy-saving performance.

3. A22 Series: A medium-sized to large-sized variable piston pump series, designed for heavy-load hydraulic systems. Typical models include A22-80-FR01BS-10, A22-110-FR01CS-10, A22-140-FR01DS-10. The displacement range is 80-140 ml/r, the rated pressure is 21MPa, and the maximum pressure is 28MPa, which can provide stable large-flow power support.

4. A37 Series: A large-sized variable piston pump series, suitable for large-scale machinery and high-demand hydraulic systems. Typical models include A37-160-FR01BS-10, A37-200-FR01CS-10, A37-250-FR01DS-10. The displacement range is 160-250 ml/r, the rated pressure is 21MPa, and the maximum pressure is 28MPa, with strong load-bearing capacity and long service life.

In addition to the above mainstream series, YUKEN also has A45, A56 and other large-displacement variable piston pump series, which are mainly used in large-scale engineering machinery, metallurgical equipment and other fields, providing personalized power solutions for different industrial scenarios. All models of these series adopt standardized design, which is highly interchangeable with international similar products, facilitating maintenance and parts replacement.

1.2 Vane Pump

YUKEN vane pumps are divided into fixed displacement and variable displacement types, with core structures including stator, rotor, vane and valve plate. The inner surface of the stator adopts a high-order non-impact transition curve design, combined with arc vanes, which minimizes pressure and flow pulsation, reduces the impact between vanes and stator inner wall, and effectively reduces operating noise. The vanes are installed in the rotor slots, and rely on the combined action of centrifugal force, mechanical thrust and hydraulic pressure to closely fit the stator inner surface, ensuring stable oil suction and discharge. Triangular unloading grooves are opened on the valve plate to completely eliminate the oil trapping phenomenon caused by vane thickness, ensuring smooth operation of the pump. Common series include single-unit pumps such as PVR1, PVR2, PV2R4A and double-unit pumps such as PVR12, PVR23, which have the characteristics of compact structure and convenient installation.

2. Key Performance Advantages

Both YUKEN variable piston pumps and vane pumps inherit the brand’s consistent high-quality performance, with common advantages such as high efficiency, reliability and strong environmental adaptability. They have good adaptability to oil quality, low sensitivity to impurities in hydraulic oil, and can maintain stable performance even in harsh working environments such as high temperature and high dust, reducing maintenance frequency and operating costs. The sealing performance is reliable, adopting high-temperature and high-pressure resistant sealing components, which can effectively prevent oil leakage and adapt to a wide working temperature range (-15℃ to +80℃). The modular design makes installation, disassembly and maintenance more convenient, reducing downtime and improving the overall operation efficiency of machinery.

In terms of unique advantages, YUKEN variable piston pumps have high volumetric efficiency (up to 95% or more), excellent energy-saving performance, and diverse control methods, which can flexibly adjust displacement according to system pressure and flow requirements, making them suitable for occasions requiring precise control. The rated pressure can reach 31.5MPa, with strong pressure resistance, and can cope with heavy-load working conditions of various machinery. YUKEN vane pumps are famous for ultra-low noise operation, with a noise value of ≤55dB during normal operation, which is lower than that of similar products in the industry. They have a wide flow range, stable output, and simple structure, with high reliability and long service life, and are suitable for occasions requiring stable operation and low noise.

3. Typical Application Scenarios in Machinery Field

Thanks to their excellent comprehensive performance, YUKEN variable piston pumps and vane pumps are widely used in various machinery fields, covering almost all industrial machinery that requires hydraulic transmission. In plastic machinery, they are commonly applied to injection molding machines, die-casting machines and rubber machinery, providing stable power support for the molding and processing process. In construction machinery, they are used in hydraulic systems of excavators, loaders, bulldozers and cranes, adapting to the harsh working environment of engineering construction and ensuring efficient operation of machinery.

In machine tools and metallurgical equipment, YUKEN variable piston pumps (with precise control performance) and vane pumps (with stable and low-noise performance) are matched with CNC machine tools, hydraulic presses, metallurgical rolling mills and heavy-duty conveyor systems, meeting the requirements of high precision and high stability in industrial production. In addition, they are also widely used in marine machinery, environmental protection equipment, packaging machinery and walking machinery, becoming an indispensable core component in the hydraulic system of various machinery, and winning wide trust from customers at home and abroad with their reliable performance.

4. Overall Summary

YUKEN variable piston pumps and vane pumps, as core products of YUKEN’s hydraulic series, integrate advanced structural design, precision manufacturing technology and excellent performance characteristics. The variable piston pump is outstanding in energy saving, precise control and high pressure resistance, while the vane pump is superior in low noise, stability and compact structure, which can complement each other and meet the diverse power transmission needs of different machinery. With strict quality control, rich production experience and wide application scope, these hydraulic pumps have become important supporting components in the global machinery industry, providing reliable power guarantee for the stable, efficient and energy-saving operation of various mechanical equipment.