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Cummins generator sets, actuators, built-in electronic actuators, EFC3408324 - engine parts

Cummins generator sets, actuators, built-in electronic actuators, EFC3408324 - engine parts
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  • Description
  • Reviews(76)
brand Cummins
Model 3408326
Color classification 34083243408326

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. Various types of Cummins PT pump actuators (34083243408326,). And formally used in Cummins high-speed - generator sets, after many years of actual use and optimization, has fully met the relevant technical standards Cummins, and can completely replace imported products. Can supply a large quantity of Cummins electronic governor, overspeed alarm, PT pump actuator, the price is preferential. The 3408324 actuator is a normally closed small flow actuator of Cummins PT pump. It is suitable for the normally closed Cummins - generator set under 500KW.

PT pump (EFC) actuators are used for normally open models. Also according to different units (such as onnaing, tailored unit) and good stability, long service life. The utility model can be used in conjunction with various corresponding control boards. This product is appointed for Cummins company.

The PT pump (EFC) actuator works stably and reliably, has powerful carrying capacity and long service life, and is well received by the large generator sets.


 

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.

⑤ 按照下、左、右三个螺位用扭力扳手,逐个拧紧到半紧(25吋磅或2.8牛•米)。再按相同次序,拧到全紧(50吋磅,5.6牛•米)


。按相同次序松开半圈,再彻底松开。

⑥ 按上列条文⑤拧紧。

拆卸:

① 用套筒扳手按下、左、右螺位次序分别松开半圈,再按相同螺位次序彻底松开,取下螺栓,放好。

② 用手掌握住执行器座,慢慢用力扭动,并外拉、直至取出壳体。当心柴油流出,弄脏衣服。

③ 倒去执行器中燃油,小心抹净油污,取去三个O形圈,放好。

9. 执行器的故障和修理:

故障:1.游车、抖动、冲动-发卡,轴承锈蚀。

2.怠速上升,甚至开车就是高速:磨损、漏油。

柴油机游车:主要检查油路漏气,如接头、衬垫、油泵壳裂纹,回油阀,等。

如果油路没有漏气,油泵调整良好、负荷比较稳定,调整控制板的增益又无效,

那么可能是执行器故障,换一个新的试试。

 

Average rating: 4.0 based on 76 reviews
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