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China Vane Pump T7-E for Variable Speed Drive - Quality Suppliers & Factory Products for Hydraulic Systems
Main Features
Feature 01
Dowel pin type vane kits designation can make the pump with small resistance, low electronic, and with more energy saving.
Feature 02
With the coordination of high pressure oil and vice spring structure, can make the pump run normally at low speed, can fit low and high speed shift, high and low pressure speed shift, right and left rotation shift etc working status of servo hydraulic system perfectly.
Feature 03
Double action and right-left rotation structure designation make the pump work more steadily, servo hydraulic system response more quickly.
Feature 04
High pressure, high speed structure and double cutting edges designation make the speed range more wide, and with more better pollution resistance, and more longer working life.
Feature 05
Low noise structure designation and wide range of flow, can be customized according to different requirements.
Feature 06
Use the cartridge kit installation structure, repairing only need change the cartridge kit, more convenient for repairing, and with more lower cost.
Frequently Asked Questions
Q
Why is a vane pump specifically designed for Variable Speed Drives (VSD) necessary? What problems can a standard pump cause in a VSD application?
This is a fundamental question. Standard hydraulic pumps are designed for constant speed. When paired with a Variable Speed Drive (VSD) and run over a wide speed range, they face significant challenges:
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Insufficient Lubrication: At low speeds, the rotation may not be fast enough to generate a proper oil film, causing abnormal wear between the vanes and the cam ring.
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Poor Ingress (Cavitation): At high speeds, the pump can fail to ingest enough oil, leading to cavitation, which damages the pump and the entire system.
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Reduced Efficiency: Efficiency can drop dramatically outside the designed operating speed.
The T7-E series solves these issues with optimized internal lubrication paths and bearing designs that ensure adequate lubrication and stable performance at all speeds, especially critical low RPMs.
Q
How much energy cost savings can I expect by using the T7-E series vane pump with a VSD?
Savings depend on the specific application duty cycle (e.g., periods of high vs. low demand). However, the principle is powerful: by using the VSD to match the motor/pump speed to the actual load requirement, you eliminate the energy waste typical of fixed-displacement pumps, which throttle flow via pressure relief valves. In real-world applications, energy savings of 20% to 50% are commonly achieved. For a continuously operating machine, the investment in a T7-E pump and VSD combo often pays for itself through lower electricity bills within a year.
Q
How does the pump perform in terms of durability and output stability at low rotational speeds?
The core strength of the T7-E series is its exceptional low-speed performance. Through specialized design features:
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Smooth Low-Speed Operation: An optimized vane design ensures smooth extension even at very low RPMs, providing stable flow and torque output without pulsation.
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Guaranteed Lubrication: A dedicated internal lubrication system directs oil to critical wear points, ensuring full lubrication across the entire speed range.
This allows the T7-E pump to maintain high volumetric efficiency and long service life over a wide speed range, truly unlocking the benefits of variable speed control.
Q
What are the maintenance benefits of the cartridge kit installation structure?
The cartridge kit design simplifies maintenance significantly. Instead of replacing the entire pump or undergoing complex disassembly when wear occurs, you only need to replace the cartridge kit. This makes repairs faster, minimizes system downtime, and reduces overall maintenance costs.
Q
How does the double action and right-left rotation structure improve system response?
The double action design balances internal radial forces, reducing vibration and wear. Combined with the right-left rotation flexibility, it ensures the pump operates much more steadily. This stability allows the servo hydraulic system to respond dynamically and quickly to rapid speed changes.
Q
How does the double cutting edges design enhance pollution resistance and working life?
The double cutting edges design reduces contact stress between the vanes and the cam ring. This configuration helps clear micro-particles and contaminants from the contact surfaces, significantly improving pollution resistance and extending the operational life of the pump components.