Overburden stripping in open cast coal mines is extensively carried out by walking draglines. Draglines' unavailability and unexpected failures result in delayed productions and increased maintenance and operating costs. Therefore, achieving high availability of draglines plays a crucial role for increasing economic feasibility of mining projects. Applications of methodologies …
A dragline is the largest mobile equipment on earth, and it is called the "kingpin" of any mine site. In this present investigation, a case of premature failure of a coal-handling dragline is discussed. Failure occurred in a linked component known as "thimble," which connects the A-frame and the vertical mast of the dragline. The thimble was broken into two halves and …
ASM Failure Analysis Case Histories: Improper Maintenance, Repair, and Operating Conditions. ... While an attempt was being made to start the diesel engine of a dragline type excavator, a severe explosion took place, the operator unfortunately being killed. ... Fatigue Failure of a Diesel Engine Piston Pin. ASM Failure Analysis Case Histories ...
Dragline boom failure . A structural defect of the boom point sheave swivel yoke was not identified. Lou Caruana. ... 01 June 2021. A coal mine worker operating the dragline was in the process of slewing with a full bucket in preparation to dump onto spoil.
This paper identifies failure surfaces in the dragline dumps and discusses the various probable failure modes on dragline dump slopes in opencast coal mines of Northern Coalfields Limited, India that were studied throughout a CIL R and D project: development of guidelines for dragline dump profile under varying geoengineering conditions (Roy I ...
Description. Part # T350 Pin for Spreader Bar. Used on a 13-15 Yard Dragline Bucket. Quantity in stock – 16
The failure of pin joints has been studied closely and some of the failure modes analyzed include: loss of the lubricant, seizure of the pin, noise and vibration in the pin joint, loosening of the …
Moreover, the failure analysis of dragline components has been analyzed by observing the both nominal stresses and hot spot stresses to predict its fatigue life in welded joints through cracks and fractures [32], [33], lacing cluster [34], [35], structure of dragline [36], swing pinion shaft [37], and bucket [38], [39].
Description. Part # CA3741#8 Hitch Pin on drag socket side. Used on a 13-15 Yard Dragline Bucket. Quantity in stock – 6
In addition, the failure analysis of dragline components have been analyzed and predicted fatigue life in welded joints through cracks and fracture [38–40], structure of dragline [41], swing pinion shaft [42], bucket [43,44], and the fracture mechanics of booms [45,46]. Fault diagnosis of draglines has also been conducted using expert ...
Besides bucket teeth failure, various pin failure due to load stress has been observed significantly. The total number of failures in the "bucket and accessories" subsystem along with all its associated components has been noted to be 364 during the study period. ... This study presented a BN model for the reliability analysis of a dragline ...
FairWinds Manufacturing creates the essential parts that connect the bucket to your Hendrix dragline machine. We also specialize in making parts that are no longer available for other brands, keeping your equipment up and running. ... (Same as Hood Angle Pin) HAPN - Hood Angle Pin Nut Only. Quanity: 1. Hood Angle Pin Nut Only. HCB - Hoist Chain ...
of the dragline, and the dragline operator is unaware of their location. The basic job steps included in this module are: 1. Conduct walk-around inspection of dragfine and work area. ... machine failure. G) Slips and falls. 2. A) Slips, falls, caught between dragline and other machine. B) Slips and falls, caught on projections. C) Rock fall ...
In this paper, failure analysis of dragline using dynamic Bayesian network (DBN) to determine the critical failure components of the dragline system and their responsible root causes.
Rather than failure analysis of the components, the fault diagnosis of 18 dragline components has been studied using experts' judgment [43]. Most of the research works performed in the dragline are carried out based on the occurrence of failure, and research works on fault diagnosis of capital intensive draglines are still limited.
This paper utilises the failure mode, effects and criticality analysis (FMECA) to identify the critical failure components of the dragline system and their root causes.
Norwich Park. Looks like the same dragline incident you posted photos of in 2009. June 27, 2012 at 2:48 PM Anonymous said... Dragline 19 vs 20 and this picture shows a machine tilted towards the operators cab and it appears to be at less of a an angle. I'd say all signs point towards a different incident. June 29, 2012 at 11:51 PM Anonymous said...
The 'King pin ' of the mine ... • Power failure CYCLE TIME One cycle time consists of 1. Drag to fill ... dragline productivity increases by 90,000 m 3 /year i.e.
Pin changeouts may seem small compared to the size and scale of most dragline maintenance, but Columbia Steel engineers know every minute counts during costly downtime. Our pins provide a positive lock without welding or hammers, for safer and quicker installation.
Draglines are capital-intensive dragline can lead to major downtime losses. The goal of HEMMs, and hence their failure has a major impact on reliability analysis is to examine a statistical …
statistical distributions. The failure of dragline components possess independent and identical distributions, as stated in an earlier study [28]. Therefore, each failure data set pertaining to a failure of the individual component was fitted to Weibull failure model using the non-linear least square method, and the MTTF was then calculated ...
Come on safety pin, POP. Come on baby, POP. Dragline: Hey Lord, whatever I done, don't strike me blind for another couple of minutes. My Lucille!... That's Lucille, you mother-head. Anything so innocent and built like that just gotta be named Lucille. …
Catastrophic failure of a dragline boom Mine type. Coal mine – surface. Incident. The boom and mast of a BE 1370 dragline failed and collapsed into the pit. No personnel were injured. At the time of the collapse the bucket was in easy digging (re-handle material); the bucket was being dragged and no hoist applied.
Therefore research works on dragline to improve its availability and productivity have been emphasized in many research papers through optimized inspection interval of dragline using time counter algorithm [2,3], and through reliability analysis and failure rate evaluation of critical components dragline to make the maintenance and replacement ...
A center pivot pin support bearing assembly to provide rotatable center restraint for a dragline excavator machine. Multiple center pin bearing support fittings imparts stabilization and additional bearing wear surfaces for increased pin useful service life before replacement. An axially center pin bore receiving fitting is provided for longitudinal spaced multiple support fits combination ...
RELIABILITY AND FAILURE ANALYSIS OF A DRAGLINE - Free download as PDF File (.pdf), Text File (.txt) or read online for free.
The dragline is the mainstay in surface mining and plays a crucial role in the economic operation of large open cast mining projects. Draglines are very complex in design and consist of hundreds of components. Ensuring the high availability of a dragline is much necessary to achieve the target production. This paper aims to optimize the availability of a critical …
SHOVEL AND DRAGLINE BUSHING AND PIN PACKAGE Options Include: OVERLAY PINS • Core material high-strength alloy • 0.375" to 0.50" Radial overlay at 55 Rc as manufactured • In-service work hardened surface to 62 Rc (to provided superior predictable wear) INDUCTION HARDENED ALLOY PINS • Core material high-strength alloy
Dragline: Boy, you're new meat. You're gonna have to shape up fast and hard for this gang. We got rules here. In order to learn 'em, you gotta do more work with your ears than with your mouth. [Luke chuckles] Dragline: Somebody say somethin'? Luke: I didn't say nothin', Boss. Dragline: Well, whatta we got here? Luke: A Lucas Jackson.
Surface defects (a) Surface Defects Figure 9: Surface Subsequent Fatigue Failures Fracture surface Defects Crack initiating point Beach marks Fracture area (b) Fatigue Failure due to Surface Defects on a Suspension Rope Wire …
The utility model discloses a kind of gear shift cap assembly dragline pin detecting tool, including bottom plate and the first support base being arranged on bottom plate, the second support base, detection axle bed and positioning block.First support base is arranged on the middle part above bottom plate, and positioning plate is equipped on the first support base, and the matched ...
Failures in hoist and drag ropes are studied and described based on site inspections on Marion and BE draglines. Causes of the failures are discussed. Some of the analyses of the wire rope …
2. Study of failure data: To analyze the failure data to which types of the failure modes, distinguished the data in different failure types. 3. Test the trends in failure rate: Plot the number of ...
Failure Analysis of the Pin Joints 2.1 Failure Modes The failure of pin joints has been studied closely and some of the failure modes analyzed include: loss of the lubricant, seizure of the pin, noise and vibration in the pin joint, loosening of the joint, yielding of …