BUCKET OVERLOADING RATIO OF MINING SIZE WHEEL LOADERS & LOAD DISTRIBUTION CURVES - A CASE STUDY

Yıl 2016, Cilt: 2 Sayı: 22, 32 - 41, 27.12.2016

Metin Özdoğan Hakkı Özdoğan

Öz

It is
extremely important to monitor bucket payload of mining wheel loader in terms
of evaluating both performance of the operator and the equipment. Both
underloading and overloading should be avoided. It is better sticking to the
optimum payload recommended by the Original Equipment Manufacturer (OEM) which
represents the optimum load for the equipment. Neither overloading nor
underloading of wheel loader (WL) is recommended. Underloading is not good from
productivity point of view; whereas, overloading will be shortening the life
expectancy of the machine in the long run and lower the Mean Time Between
Failures, (MTBF).

 

A LeTourneau
L-1350 model (21m3) Electric Wheel Loader (EWL) operating in a gold mine in
Uşak, Aegean Turkey, was monitored via onboard device for five cases. The
payloads, overloads and critical overloads; load distribution curves of shifts
with respect to overloads investigated. The overload and critical payload
counts are given and ratios in total bucket counts are calculated and
illustrated for the cases reviewed.

Anahtar Kelimeler

Electrical Wheel Loader, Bucket Payload, Target Payload, Bucket Overload, Bucket Critical Overload

BUCKET OVERLOADING RATIO OF MINING SIZE WHEEL LOADERS & LOAD DISTRIBUTION CURVES - A CASE STUDY

Öz

Elektrik
tekerli yükleyicinin kepçe yükünü izlemek, hem operatörün hem de ekipmanın
başarımını değerlendirmek bakımından olağanüstü önemlidir. Kepçeyi makina
üreticisi tarafından önerilen hedef yükten az 
ya da çok yüklemekten kaçınmalıdır. Optimum yükten az doldurmak araç
üretkenliği bakımından, çok doldurmak ise araç ömrü ve sağlığı açısından
önerilmez. Kepçenin aşırı yüklenmesi makinadan beklenen ömrün ve arızalar arası
sürenin kısalmasına neden olur.

 

Ege
Bölgesinde, Uşak’da bir altın madeninde çalışan bir LeTourneau L-1350 model
(21m3) elektrik tekerlekli yükleyicinin başarımı özellikle kepçe yükü ve aşıurı
kepçe yükleri yönünden izlenen beş vaka verilmiştir. Vardiya ve günlük kepçe
yükü dağılım eğrileri, aşırı ve kritik aşırı yük sayıları ve yüzdeleri
irdelenmiştir.

Anahtar Kelimeler

Elektrik Tekerli Yükleyici, Kepçe Yükü, Hedef Kepçe Yükü, Kepçe Aşırı Yükü, Kritik Kepçe Aşırı Yükü

Kaynakça

• [1] Anon a, 2016 ; “Wheel Loaders”, www.joyglobal.com/surface-mining/wheel-loaders.
• [2] Anon b, 2016 ; “P&H PreVail System Centre”, U.K.
• [3] Anon c, 2016 ; “P&H Prevail System Daily Monitoring Reports”, U.K.
• [4] Anon d, 2016 ; “Loader Manual Sample” North Pacific Training &Performance, Inc., B.C., Canada
• [5] Franklin, S., 2016 a; “Fill the loader bucket”, www.cemagg.com/fill-the-loader-bucket.
• [6] Franklin, S., 2016b; “Position the haultruck correctly”, www.cemagg.com/position-the-haultruck-correctly.
• [7] Franklin, S., 2016c; “Establish the correct haultruck payload”, www.cemagg.com/establish-the-correct-haultruck-payload.
• [8] Franklin, S., 2016d; “Provide sufficient working room”, www.cemagg.com/provide-sufficient-working-room.
• [9] Franklin, S., 2016 e; “Don’t work in water”, www.cemagg.com/don’t-work-in-water.
• [10] Singh, S and Narendrula, R. 2007; “Performance monitoring of loading equipment” Aggregates International, 01/2007, pp.16-21, Nederlands
• [11] Wood, A., 2014; “Personal communication”, Joy Global Surface Mining Equipment Division”, Bolton, England.