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T7 variable speed vane pumps especially dedicated to provide an ideal solution for modern servo controlled machines.
Main benefits of variable speed drives:
Energy savings
• Up to 70 % less electric Energy for the E Motor and less or no cooling for the hydraulic equipment
• Lower noise emissions
• Lower total cost of the hydraulic system
• Smaller pump, less valves, less or no cooling, smaller fluid tank, increased lifetime for the components
Denison Series Servo Vane Pump:
T7B E02 E03 E04 E05 E06 E07 E08 E10 E12 E15 E17 E20
T7D E14 E17 E20 E22 E24 E28 E31 E35 E38 E42
T7ES E45 E50 E52 E54 E57 E62 E72
T7 Series Servo Vane Pump / Single Pump Technical Analysis (English Translation)
1. Product Overview
• Brand Positioning: The T7 series belongs to themid-to-high-end hydraulic pumpcategory, manufactured by renowned international hydraulic vendors (e.g., Bosch Rexroth, Parker Hannifin) or specialized vane pump manufacturers. It is designed for applications requiring highdynamic responseandenergy efficiency.
• Core Functions:
• Servo Vane Pump: Integrates a servo motor forclosed-loop pressure/flow control, achieving a 30%~50% faster response than traditional variable displacement pumps.
• Single Pump Design: A single-stage vane pump suitable for small-to-medium hydraulic systems (displacement range typically10~100 cc/rev).
2. Key Technical Specifications
【表格】
Parameter Typical Values Notes
Displacement 12~80 cc/rev (configurable) Supports customizable displacements (e.g., 12/25/40/63/80 cc/rev).
Max. Pressure 210~280 bar (model-dependent) Peak pressure up to 315 bar (short-term).
Speed Range 600~3,000 RPM Servo-driven for low-speed, high-torque operation (e.g., 80% rated flow at 600 RPM).
Volumetric Efficiency ≥92% (standard conditions) Surpasses traditional vane pumps (typically 85%~90%).
Control Mode Pressure/flow/power composite control Precision regulation via CAN bus or analog signals.
Interface Standard SAE J518C (flange), ISO 6162 Supports multiple mounting configurations.
3. Core Technical Advantages
1. Servo Motor Direct Drive
• Eliminates traditional couplings/belts, improvingmechanical efficiency by 5%~8%.
• Example: In injection molding machines, the T7 pump with a servo motor reduces energy consumption by15%~20%.
2. Optimized Dynamic Response
• The vane pump’slow rotor inertia, combined with servo motor responsiveness, achieves a flow step-change time of ≤20 ms(vs. 50~100 ms for traditional pumps).
• Applications: Rapid feed in machine tools, mold opening/closing in die-casting machines.
3. Low-Pulsation Design
• Adopts a7-vane rotor(vs. 5-vane in traditional pumps), reducing flow pulsation by40%and noise to ≤68 dBA.
4. Long Service Life
• Floating side plate technology compensates for wear, extending lifespan to20,000 hours(vs. ~10,000 hours for traditional pumps).
4. Typical Applications
• Injection Molding Machines: Replaces fixed-displacement pumps + proportional valves for30% energy savings.
• CNC Machine Tools: Drives X/Y/Z-axis servo valves with positioning accuracy of±0.01 mm.
• Die-Casting Machines: Rapidly adjusts mold-clamping pressure to reduce flash defects.
• Test Benches: Provides0.1~100% stepless speed regulationfor hydraulic component testing.
5. Selection Guide
【表格】
Application Scenario Recommended Model Key Parameters
Energy-Efficient Injection Molding T7-63-SV-01-XX Displacement: 63 cc/rev, Rated pressure: 210 bar, Servo motor power: 15 kW
High-Speed Press T7-25-HV-02-XX Displacement: 25 cc/rev, Max. pressure: 280 bar, Max. speed: 3,000 RPM
Precision Hydraulic Press T7-40-PF-03-XX Composite control (pressure + flow), Repeatability: ±0.5%
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