• T-ROTOR refers to the trajectory of a point inside a circular plate that rolls without slipping around a fixed circumference. The trajectory formed when the disk rolls externally outside the circumference is called an Epi-trochoid, while the trajectory formed when it rolls internally within the circumference is called a Hypo-trochoid.
• A T-Rotor Pump is a type of internal gear pump consisting of a pair of inner and outer gears made based on these Trochoid Curves.

• The T-ROTOR pump is an internal gear pump that produces suction and discharge by forming a certain space while a pair of gears, manufactured according to the principle of Trochoid Curve, perform an internal rolling motion.
• The in rotor, which has one fewer tooth than the out rotor, rotates eccentrically at a certain distance from the external rotor, creating a constant space between the inner and outer teeth. As it continuously grows larger and smaller, it forcibly sucks in fluid. , It is a pump designed to discharge, and the rotor’s movement form is as shown in the picture above.

• The suction pressure is high, and both mechanical efficiency and volumetric efficiency are high.
• Since the inner and outer gears move in a rolling contact motion based on the trochoid curve, the relative speed is lower than that of a gear pump, resulting in less gear wear and reduced discharge pulsation.
• The structure is simple, making disassembly and repair easy. As a result, it is more compact than a gear pump of the same capacity with an internal gear type, and it has a longer lifespan.
• It has a greater discharge volume per revolution compared to a gear pump of the same size and weight.
• It does not require a crescent-shaped spacer like a gear pump, and it has a variety of applications, including lubrication, hydraulic use, and transfer.
• Since it always operates with a single point of contact, it has a wide rotational range, accommodating both low and high-speed rotations (500 to 3000 rpm).

Installation Location of the Pump

- The installation location of the pump should be well-ventilated, with low temperature and humidity. The pump should be installed at a slightly elevated position compared to the tank.

Discharge Volume, Viscosity, Rotational Speed

- The discharge volume of the pump is proportional to the rotational speed, with an optimal rotational speed range of 1000 to 1800 rpm. The kinematic viscosity is appropriate in the range of 20 to 1000 cSt at 40°C.

Suction Side piping

- When installing the suction side piping, ensure complete sealing to prevent air entrapment. Minimize the use of elbows, valves, and cocks as much as possible. Additionally, use thick and short suction piping, ensuring that the suction speed is below 1.5 m/sec.

Suction Side filter

- Always use a filter with a mesh size of 60 MESH or higher on the suction side, and maintain the suction pressure between 0 and 0.15 kg/cm². Additionally, ensure that the filtration area is more than twice the discharge volume of the pump.

Discharge Side piping

- The discharge side piping should maintain a flow rate of 3 m/sec or lower. If the piping diameter is small and the flow rate is too high, it can place excessive load on the pump, reduce flow volume, and cause an increase in fluid temperature.

Oil tank

- The capacity of the oil tank should be at least three times the pump's discharge volume per minute, and a level gauge must be attached. If the tank capacity is too small, it can lead to an increase in fluid temperature, rapid degradation, and poor suction performance.

- Additionally, ensure that the distance between the suction filter and the drain pipe is as far apart as possible. To prevent the mixing of air bubbles and foreign substances, install at least two baffles inside the tank.

Flow Rate Calculation

◎ Suction Speed: Should be below 1.5 m/sec
◎ Discharge Speed: Should be below
◎ V = (4Q) / (πd2)
V: Flow velocity (m/sec)
Q: Flow rate (m³/sec)
d: Internal diameter of the pipe (m)

Motor Selection Precautions

- As the discharge volume of the pump increases or the pressure rises, the power consumption of the motor increases.

- For the same type of oil, a decrease in temperature results in increased viscosity, leading to higher power consumption by the motor (based on temperatures from 25°C to 40°C).

Calculation of Required Power

- The required power of the pump changes not only with the pump's operating power but also with the viscosity and temperature of the oil (considering seasonal effects).
Therefore, when calculating the required power, it should be based on the worst-case scenario.

- Required Power Calculation Formula (Operating Power)

Lm = (P . Q) / (612 . η) (KW)
Lm = (P . Q) / (450 . η) (HP)
P: Discharge pressure (kg/cm²)
Q: Discharge volume (ℓ/min)
η: Coefficient (maximum efficiency of the pump)