PT pump built-in actuator 3408326 Cummins - generator electronic actuator 3408324

The electronic actuator is a built-in executor. Electronic governor, overspeed alarm and fuel pump actuator composed of electronic speed control system automatically adjusts the speed of - generator, normal, stable and safe operation of the power unit to play a key role.

3408326 actuators can replace the Cummins PT pump normally open large flow actuator, applicable to the following 300KW normally open Cummins - generator sets,

3408324The actuator is the normally closed small flow actuator of Cummins PT pump, suitable for500KWFollowing normally closed Cummins - generator sets..

affordableQuality assurance, welcome to inquire! For years, we have plenty of stock in stock, ready for delivery at any time. Nationwide within 1-3 days of arrival.

1. principle:

The coil is connected with the direct current, and the oblique end of the armature (outer end) generates torque to balance with the spring force, which drives the rotor to rotate and adjusts the amount of oil,

Change the speed of the - engine. (compare with real object.)

2. structure:

Actuator is a high-precision device, the key to accuracy, in the relative movement of the friction surface gap, requiring rotation is very flexible, minimal clearance, smooth finish, high hardness, long life.

The shaft of early open type is single column type. The normally closed three gimbal head, the - must be able to solve problems issuing installation eccentric, but the actual use of the card seems more, life is short.

Some users load relatively stable or not high speed requirements, such as oil system, electronic governor will be expensive (actuator + control board) saved, PT pump is changed into a mechanical speed regulator, price drop, prolonged service life.

For users with higher power requirements, switch to electromagnetic valve actuators, the price of more than half of the province, and no oil leakage problems, life expectancy is greatly extended.

3. varieties:

According to the oil supply mode is divided into normally open and normally closed two categories, open parking often open hole, normally closed throttle switch.

According to the unit power, divided into small flow 200 ~ 300KW, medium flow 400 ~ 600KW, large flow 800KW or more use, the flow size by the size of the oil hole, the actuator structure is the same.

4. specifications:

Voltage: 24V, coil resistance 22, 7.2 + 0.4 ohms, inductance: 120 + 20 milli, reaction time 15 milliseconds.

Operating temperature: 38, 7.7, 94, 9.6, operating temperature 125, 10.6.

5. normal working conditions:

When opening the power supply: there are agile, crisp, small sound, often open type 1 ring, usually closed type 2 ring.

If the actuator is hairpin, the sound is hoarse or not loud.

6. matters needing attention:

The fuel must be cleaned and the oil filter must be replaced regularly.

Loading and unloading must be made according to the prescribed procedures and the order of the screw position. Replace the new O ring each time handling.

The normally open or normally closed type actuator must be matched with the same type of control board, otherwise the starter can not speed up or drive to the high speed. This has nothing to do with the panel and the big bottom.

7. limits of life and life:

Life span: there is no official life support in the available data. No instructions for the use of the actuator.

The experience value of life is 5000 hours, usually open 6000~8000 hours, usually closed 2000~5000 hours.

The life of the actuator is greatly related to the conditions of use. If the fuel is well cleaned, many users will use it for more than 10000 hours. If the fuel is dirty and the life span is shortened, it will be broken for hundreds of hours. If the new actuator is mixed with a small piece of sand, it can be broken immediately. Therefore, the clarification and filtration of fuel is very important.

The limit of life: there is moisture in the fuel, and the bearings and iron parts in the actuator must be rusted and hairpin, and the operation is unstable. Actuator rotating part of the friction surface work for a long time gradually wear and tear, gap gradually increased, resulting in oil spills, when the oil spill exceeds idle fuel consumption, the control board lose control ability, gradually appear the following phenomena:

Idle speed after unloading: 900 RPM / min..

Cold drive for several minutes, idle speed gradually increased to 700~1000 RPM / min.. This is because the oil temperature rise, viscosity drop, oil leakage increases. Pour cold water on the oil pump and slow down.

Drive idle speed is very high, (900~1700 turns / minute) cannot adjust.

Appear above, not too serious, although empty car speed is high, but a little load 5 ~ 15% (20 ~ 40KW) above, rotate speed

Can be reduced to 1500 rpm / min, you can control the work normally.

8. loading and unloading operation:

Installation: 1. Size of two O rings on the actuator. Apply oil.

Enlarge the O ring on the oil pump and apply oil.

Insert the actuator into the pump shell and push and twist it with the palm until the pump shell is 10mm. The pin is upward and aligned with the three screw holes.

Load three bolts and tighten with your fingers.

According to the lower, left and right three screw, with torque -, one by one to tighten to half tight (25 inch pounds or 2.8 cattle meters). In the same order, twist to full tight (50 inch pounds, 5.6 cattle meters)

. Loosen the half ring in the same order and release it completely.

According to the above provisions of the tightening.

Disassemble：

Use the socket - to press the left and right screw positions to loosen the half ring, then release the bolts in the same order of position, and then take the bolts off.