YCY14-1B High Pressure Constant Pressure Axial Piston Pump

The premium YCY14-1B Series High-Pressure Axial Piston Constant Pressure Variable Displacement Pumps (comprising rigorous model configurations 10YCY14-1B, 25YCY14-1B, 40YCY14-1B / 40YCY14-B, and the heavy-delivery variant 63YCY14-1B) by Chengyuan Hydraulic represent durable, industrial-grade fluid power components optimized for 100% direct drop-in interchangeability with global hydraulic systems. Manufactured in precise alignment with classical high-pressure hydraulic manufacturing standards and structural tolerances, these units match original mounting pilot dimensions, input splines/keyed shafts, and structural port threads. Global industrial B2B distributors can deploy these pumps immediately into pre-existing equipment arrays without layout re-engineering or plumbing adaptations.

Operating as an energy-conserving fluid power core for high-pressure plant applications, the YCY series introduces an adaptive Constant Pressure Variable Control mechanism. Once system pressure reaches the user-tuned threshold, the internal spool pilot swivels the pump swashplate backward to a near-zero displacement angle, providing only enough oil migration to compensate for systemic leakage and eliminating excessive heat-generating relief overflows. At Chengyuan, quality metrics are absolute; every YCY14-1B pump clearing the factory floor completes a 100% rigorous dynamic simulation test cycle on our digital automated benches. By evaluating volumetric efficiencies at a continuous 31.5 MPa, checking variable response latency, and tracking internal leakage parameters, we guarantee rock-solid industrial reliability and zero-defect deployments.

Technical Specifications

• Product Series Designation: YCY14-1B Constant Pressure Variable Axial Piston Pump Series

• Nominal Continuous Operating Pressure: 31.5 MPa (315 bar)

• Maximum Peak Shock Pressure Capability: 40.0 MPa (400 bar)

• Nominal Synchronous Motor Speed: 1500 rpm

• Hydraulic Circuit Application: Open Circuit Configuration

• Control Methodology: Constant Pressure Displacement Regulation (Adaptive pressure-feedback infinite modulation)

• Model-Specific Engineering Data (Catalog Verified):

  • Model Identification: 10YCY14-1B

  • Geometric Displacement: 10.0 cc/rev ($cm^3/rev$); Nominal Output Flow at 1500 rpm: 15.0 L/min; Constant Pressure Adjustment Range: 5.0 – 31.5 MPa; Net Weight: 26.0 kg

  • Model Identification: 25YCY14-1B

  • Geometric Displacement: 25.0 cc/rev ($cm^3/rev$); Nominal Output Flow at 1500 rpm: 37.5 L/min; Constant Pressure Adjustment Range: 5.0 – 31.5 MPa; Net Weight: 42.0 kg

  • Model Identification: 40YCY14-1B / 40YCY14-B

  • Geometric Displacement: 40.0 cc/rev ($cm^3/rev$); Nominal Output Flow at 1500 rpm: 60.0 L/min; Constant Pressure Adjustment Range: 5.0 – 31.5 MPa; Net Weight: 58.0 kg

  • Model Identification: 63YCY14-1B

  • Geometric Displacement: 63.0 cc/rev ($cm^3/rev$); Nominal Output Flow at 1500 rpm: 94.5 L/min; Constant Pressure Adjustment Range: 5.0 – 31.5 MPa; Net Weight: 78.0 kg

• Recommended Working Media: Premium anti-wear mineral hydraulic fluids (Viscosity spectrum: 20 to 50 $mm^2/s$)

• System Fluid Hygiene Enforcement: Minimum target cleanliness of ISO 4406 20/18/15 (NAS Class 9)

Key Technical Advantages

• High-Rigidity Ductile Iron Housing with Anti-Fatigue Structural Integrity: The primary pump shell is cast from specialized high-density ductile iron (QT500-7) and processed through multiple stress-relieving thermal annealing cycles. Under extreme 40 MPa burst stresses or high-frequency load cycling, micro-elastic deformation of the housing is driven to near zero, entirely avoiding high-pressure casting fractures or internal cross-chamber pressure bypass.

• Micron-Level CNC Lapping for Core Tribological Pairs: The primary piston-cylinder, cylinder-valve plate, and slipper-swashplate mating configurations have undergone material optimization. The rotating cylinder block face interfaces with a bi-metal, vacuum-sintered bronze alloy valve plate, flat-lapped to a flatness under $1\,\mu\text{m}$. This secures high-efficiency hydrostatic oil film support and keeps volumetric efficiency above 93% under continuous 31.5 MPa operation.

• Ultra-Responsive Integrated Pressure Compensation Valve: The built-in constant pressure tracking spool and biased heavy spring set are calibrated via saturation fatigue fatigue protocols, achieving an adjustment response cutoff time of $\le 60$ ms. The pressure control curve is Exceptionally flat, instantaneously adjusting the swashplate tilt angle when downstream resistance shifts, suppressing pressure overshoots and preventing systemic thermal decay.

• Heavy-Duty Tapered Bearings Engineered for Radial & Axial Loading: The primary input drive shaft is supported by oversized, heavy-duty tapered roller bearing assemblies, delivering high resistance to off-axis loading and mechanical fatigue. This tight geometric concentricity ensures the drive shaft and turning cylinder block remain perfectly aligned for over 5,000 hours of continuous full-load operation, suppressing early-stage mechanical noise.

Application Areas

Due to its outstanding pressure-holding properties, high shock-load tolerance, and superior energy utilization, the YCY14-1B constant pressure piston pump series is widely integrated into high-power, industrial-grade heavy hydraulic power stations:

• Metal Forming & Medium-to-Heavy Machine Tools: Primary power units for heavy-duty metal scrap shears, waste baling compactors, industrial metal sheet press brakes, and structural punching machines.

• Heavy Brick Construction & Refractory Material Presses: Main hydraulic power supplies for concrete refractory brick forming equipment, automated high-pressure ceramic tile molding machinery, and heavy industrial rubber vulcanizing presses.

• Heavy Metallurgy & Industrial Steel Rolling Operations: Secondary screw-down auxiliary hydraulic systems for steel casting and rolling mills, actuation units for high-pressure safety valves, and shipyard heavy marine elevator lift assemblies.

Expert Maintenance Tips

• Mandatory Casing Priming Prior to Startup: Once the YCY pump is secured onto the hydraulic grid, the housing must be fully pre-filled with clean, filtered hydraulic fluid via its highest accessible case drain port before initial electrical commissioning. Jog the electric motor in short intervals during initial startup to purge all trapped air. Running the pump bone-dry will cause dry-friction galling and seize the core tribological pairs within 5 seconds.

• Independent Case Drain Routing Back to Reservoir: When operating under full pressure compensation cutoff, the internal case drain flow serves as the sole cooling media for the rotating subassembly. Case drain back-pressure must be strictly managed to remain $\le 0.1$ MPa, and the drain line must run directly and independently back to the fluid reservoir. Never routing this line through return filters or merging it into main system return manifolds to prevent front shaft lip seal blowouts or slipper detachment.

• Routine Inspection & Cleaning of the Pilot Control Damping Orifice: If the hydraulic network displays drifting constant-pressure thresholds, failure to destroke, or intense pressure pulsations, shut down the machine and inspect the head-mounted constant pressure compensation control block. Check that the micro-metering pilot damping orifice is not fouled by fluid particulates. Maintain regular fluid flushes to ensure the variable stroke mechanism remains highly responsive.