A 3 H Series High-Pressure Variable Piston Pump April. 2003 YUKEN KOGYO CO. , LTD. 0
Features A 3 H, the ultimate design pump developed by Yuken’s own technology. It is consequently extended with wide displacement range and high pressure. • Optimal control types available for industrial machines and industrial vehicles • Wide displacement range with single and through drive pump • High performance having maximum pressure up to 35 MPa • Low noise level and high reliability based on well proved service • Compact in size, greater ratio of Output power to Mass 1
Compact 2
Displacement 3
Specifications “ 01” 4
Structure “ 01” 5
Control Type “ 01” “ 09” “ 14” “ 01”: Pressure Compensator Type “ 09”: Constant Power Control Type “ 14”: Load Sensing Type “ 55”: Two Pressure & Two Flow Control Type （High pressure set : By relief valve) “ 55” 6
Control Type 7
Model Number Designation Series A 3 H 56 -FR 01 KK-10 Pressure compensator Shaft Extension K: Keyed, S: Splined Pressure adjust range K: 5~35 MPa Mounting F: Flange, L: Foot Direction of Rotation R: Clockwise(Normal) A 3 H 56 -FR 09 -22 B 4 K-10 Electric Motor No. of Poles 4: 4 P, 6: 6 P Frequency of Power Source A: 50 Hz, B: 60 Hz Constant Power Control Power Set See Next Table A 3 H 56 -FR 14 K-10 Load Sensing 8
“ 09” Constant Power Control Type A 3 H 56 -FR 09 -22 B 4 K-10 Note) Hydraulic power (k. W) changes according to shaft rotation speed. 9
Dimensions A 3 H 16~A 3 H 180 10
Through Drive Type A 3 H 71 with Gear Pump Splined Shaft A 3 H 1671 tandem pump Keyed Shaft 11
Tandem Pumps 12
Constant Power Control “ 09” Structure of Control Section Graphic Symbol Q p cam feedback piston α N M control piston 0 spring compensator spool pp Pump swash-angle(α) changes in inverse proportion to delivery pressure(p). Under power control condition, the figure p ×α remains in constant balance between two forces acting on cam. One force is spring acting via the compensator spool, the other force is delivery pressure via the feed back piston. The operating point change is dependent on swash angle. Consequently, pump oil power (p × Q) is kept constant at constant condition of shaft speed(N) because Q=N ×function(tanα). 13
Constant Power Control “ 09” Performance Data: A 3 H 180 Test condition ・Hydraulic oil : ISO VG 32 ・Temperature : 40℃ ・Oil viscosity : 32 mm 2/sec ・Max. speed : 1800 r/min ・Control power set : 75 k. W Test condition ・Hydraulic oil : ISO VG 32 ・Temperature : 40℃ ・Oil viscosity : 32 mm 2/sec ・Max. speed : 1500 r/min ・Control power set : 45 k. W Output flow Input power Pressure 14
Load Sensing “ 14” Load Sensing Flow Graphic Symbol Pressure Flow Const. Flow Control Shaft Speed ●Variable Flow Compensator Setting: 1. 0~3. 0 MPa ●Pilot relief valve connection via remote control port (pp) 15
Load Sensing “ 14” Performance Data: A 3 H 56 Test condition ・Hydraulic oil : ISO VG 32 ・Temperature : 40℃ ・Oil viscosity : 32 mm 2/sec ・Max. speed : 1800 r/min ・Flow Compensator Set : 1 MPa Flow Pressure 16
Noise Level Characteristics Typical Data; at Max. Flow Cut Off, N= 1800 r/min 1 metre away from pump head cover 17
Noise Level Characteristics Typical Data; at Full Cut Off, N= 1800 r/min 1 metre away from pump head cover 18
Applications Ø Presses, Pipe bending machine Ø Tube forming machine Ø Steel works, Rolling mills Ø Injection molding machine, Die casting Ø Compactor Ø Industrial Vehicles 19
Equivalent Models A 10 V PVP PVH PVM K 3 VL 20
End Cover Doc. No. ：PPD. 2797 Compiled by YUKEN Product Planning Section Date of issue： 4/03/2003 Reference Publication Pub. No. ：EL-0108 Title：A 3 H Series High Pressure Variable Displacement Pumps Date of issue： 9/25/2002 ALA Industries Limited. 1150 Southpoint Drive, Suite D Valparaiso, IN 46385 Tel: 219 -465 -4197, Fax: 219 -477 -4194 www, yuken-usa. com YUKEN KOGYO CO. , LTD. International Business Department 1 Miyamae, Fujisawa, Kanagawa Prefecture, 251 -8525 Japan Telephone：+81 -466 -23 -2107 Facsimile：+81 -466 -27 -7100 e-mail：int. bd@yuken. co. jp Internet：www. yuken. co. jp 21
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