T7-E Vane Pump For Variable Speed Drive
Main Features
1. Dowel pin type vane kits designation can make the pump with small resistance, low electronic, and with more energy saving.
2. 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.
3. Double action and right-eft rotation structure designation make the pump work more steadily, servo hydraulic system response more quickly.
4. High pressure, high speed structure and double cutting edges designation make the speed range more wide, and with more better polution resistance, and more longer working life.
5. Low noise stucture designation and wide range of flow, can be customized according to different requirements.
6. Use the catridge kit insallation structure, repairing only need change the cartridge kit, more convenient for repairing, and with more lower cost.
fAQ
Q1: Why is a vane pump specifically designed for Variable Speed Drives (VSD) necessary? What problems can a standard pump cause in a VSD application?
A: 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:
●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.
● 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.
● 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.
Q2: How much energy cost savings can I expect by using the T7-E series vane pump with a VSD?
A: 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.
Q3: How does the pump perform in terms of durability and output stability at low rotational speeds?
A: The core strength of the T7-E series is its exceptional low-speed performance. Through specialized design features:
● Smooth Low-Speed Operation: An optimized vane design ensures smooth extension even at very low RPMs, providing stable flow and torque output without pulsation.
●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.