Excavator and its productivity count

kharrazi (63)in #engineering • 7 years ago (edited)

^{Children are watching the excavators work. Image credit @kharrazi}

Greetings, how are you steemit friends? Glad to meet you and hopefully healthy always. Today I will discuss heavy equipment used in construction works, especially excavators. Hopefully useful.

Who is not familiar with excavators, heavy equipment that is often found in almost every construction job, this heavy equipment has been helping human work for a long time and is now increasingly being developed.

Today I will discuss this machine and try to make the calculation of production capacity hourly, so you can determine how long the excavator you have to lease to finish your work because usually excavator you can rent with relative cost per hour.

We'd better get to know this heavy equipment closer.

EXCAVATOR

^{An old excavator that still uses the wires as an arm drive [image source]}

Excavator or backhoe is a kind of heavy equipment that serves to dredge the surface of the soil or other. This machine has a basket to move loaded/dredged loads and can rotate 360 degrees.

All excavator components are driven by a hydraulic system, the system has previously used steam that is prominent with Power Shovel.

In 1835, Sir William Smith Otis created the excavator by utilizing a steam engine, this first generation excavator serves to dig up the construction of railroads. Otis received a patent for his work in 1839, the same year of his death.[source]

Excavator has various components, such as stem (hand), rotary house, chain wheel and so forth. Currently, excavators have evolved from heavy equipment that serves as excavators can also be other heavy equipment, such as tools to destroy concrete and so on, excavators are needed in medium-scale construction work and in mining areas such as coal mines and so forth.

Modern excavators have various types and sizes and can be used as.[source]

Dig a hole
Lifting material
Cutting material
Leveling the ground
Plug a pile

Functions and excavator parts.[source]

Bucket: Dredge

Bucket cylinder: Moving bucket

Arm cylinder: Moving arm

Boom cylinder: Moving the boom

Arm: Moving a bucket

Boom: The arm lever moves up and down

Cabin: Control room

Tracker: Wheel

We will calculate the productivity of excavators per hour, using a standard excavator with a 0.93 m3 bucket capacity, and this number may change according to the type of excavator.

PRODUCTIVITY CALCULATION OF EXCAVATOR STANDARD

Question.
What is the productivity of standard excavators per hour during excavation with a depth of 2-4 meters?

Is known.

Information	Code	Coefficient	Unit
Material development factors	Fk	120	Percent
Bucket Capacity	V	0.93	m3
Bucket Factor	Fb	1.00	-
Efficiency Factor Tool	Fa	0.83	-
Conversion factor, depth <40%	Fv	1.00	-
Material Weight Content	Bim	0.85	-
Cycle time	Ts1	-	Minute
- Digging, loading and others	T1	0.32	Minute
Cycle Time = T1xFv	Ts1	0.32	Minute
Production Capacity / Clock = (VxFbxFax60) / (Ts1xFk)	Q1	120.61	M3 / Hour

^{The principle of a hydraulic excavator. [image source]}

In fact, the bucket will become increasingly difficult to fill as the excavation deepens, so to get a fully charged bucket requires several extra movements that cause longer movement cycles.

What is meant by the bucket factor (Fb) is the level of soil hardness, with easy scores (1.1-1.2), moderate (1.0-1.1), somewhat difficult (1.0-0.9) and difficult (0., 9-0.8). While the meaning of the excavation factor (Fv) is a 40% dig depth condition with an easy score of 0.7, normal 0.9, rather difficult 1.1 and difficult 1.4.

The efficiency factor (Fa) is the instrument operating condition, with a score of either 0.83, moderate 0.75, slightly less 0.67, and less 0.58.

^{Excavations using modern Link-Belt excavators. [image source]}

CONCLUSION

The excavator was created by Sir William Smith Otis initially to ease the excavations on railroad construction work in 1835 and Otis received a patent four years later.

Currently, excavators have been growing and in accordance with the needs, such as the existence of mini excavators that function to clean the channels in the city and village, also has also created a large size excavator, has a large bucket capacity as well.

In accordance with the above sample calculations and in accordance with the technical analysis then for the average production capacity of the standard excavator with a depth of 2 to 4 meters of excavation is 120.61 m3/hour.

This calculation has included shrinkage factors and other external factors, also taking into account the arm cycle and average rotation of the excavator at work.

By knowing the productivity of excavators per hour then you can determine how long you can rent this heavy equipment to complete your work to make it faster and save money.

This calculation is only an example and can be used by anyone, this calculation is in accordance with a technical analysis and can be developed in accordance with the needs of a field.

This is the only thing I can write on this occasion, over all the mistakes and lack of unintentional writing as a servant of God, I apologize.

Thanks to friends who have visited this blog and provided constructive comments, as well as scientists who are willing to sacrifice their time for a better civilization.

Active link reference:

www.wikipedia.org

www.alatberat.com

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