Coal Ship Unloader Unloader Port Handling Equipments

Chain Bucket Ship Unloader Continuous Met Coke Coal Ship Unloader Iron Ore Ship UnloaderAdvantages of grab-type ship unloader
Grab TypeShip unloader using mechanical differential trolley grab unloading technology of advanced technology, high speed, high efficiency, widely used in large, medium and small coal or ore ship unloading or power plant dock ship unloading operations. According to the terminal planning, job type and other requirements to design the different needs of the ship unloading machine.
.
Grab ship unloader is simple, stable and reliable work, simple operation,low maintenance cost.
Design, ship unloader manufacturing, installation and commissioning shall comply with the following standards (latest version) or by the manufacturer and the approved by the employer with the same level of other standards.
Design criteria and specifications to be used:
International Standardization Organization standard ISO
International Electrical Commission Standard IEC
European Transport Engineering Association standard FEM
American Gear Association standard AGMA
American Welding Society Standard AWS
American Society for material testing standards ASTM
Swedish industrial standard SIS
China national standard GBElectric system of ship unloading machineThe main electrical equipment components, such as electrical transmission system and electric control system components, should choose foreign well-known manufacturers of the products (such as: ABB, SIEMEN or Schneider products), and subject to the final confirmation by the tenderer and electrical integration with Wuhan Gangdi Electric Co. ltd..In addition, electrical components and other electrical equipment including: device protection and control, surveillance, detection of all system components (including software) and the tender side that must introduce the parts and materials must be famous manufacturers of domestic production of original products, and shall be subject to approval of bidding. High voltage system includes: high voltage switch cabinet, transformer, the use of China's domestic manufacturing ABB, SIEMENS components of the domestic complete sets of products. Transformer using dry transformer, the use of electrical and electric, Shunde substation, Tin Shui products.Structure calculation of ship unloading machineAll metal structure (including but not limited to, after the front girder girder, trapezoidal frame, rod system, hinge shaft system, frame, chassis, track, room structure, cable rack mounted in gold bearing structure of tendons and other agencies); finite element calculation of metal structure, should consider the various conditions of unloading the machine in the calculation of discharge system; design and calculation; the calculation of main trolley structure and design review in the user may be required.
TROUBLE SHOOTING FOR MECHANISMS
TroubleCausesEliminationExcessive heat generation at anti-friction bearingsNo lubrication orlack of lubricant
Contamination in bearingsAdd grease to sufficient amount
Clearup the bearings with kerosene and grease thenIncreased noise level during bearing operationPoor fitting up, bearing declined or excessively tightened and thus jammed.
Any parts damaged or worn out in the bearingsCheck installation and adjustment.
Replace bearings.Periodic chattering noise in the reducer, more notable at idle gear.Excessive error of teeth pitch, clearance at tooth blank exceeds standard value.Make good and reassemble.Severe metal rubbing sound in the reducer and "Ding-dong" sound of reducervibrationToo small clearance of gearing, misalignment of the gear wheel with center line, sharp edge at the teeth tips, uneven tooth facedue to wear (minor groove and convex)Make good and reassemble or replace.Continuous, non-uniform knocking during gear meshing heard from any point on the reducer casing and vibration can be felt.Defects on tooth flank (laminated structure).Replace
2000th Bridge Grab Type Continuous Grab Coal Ship Unloader bulk Coal UnloaderTROUBLE SHOOTING FOR STRUCTUREFaultCausesEliminationSevere sag of the girder affecting normal travelling (trolley and gantry).Improper shipping and storage
Frequent overloading operationMake shipment and storage properly as required
Operate reasonably as specified
Check for severe sagCracks at welds of essential portions of structural membersLocal stress concentration
Severe vibration (alternate operation in normal and reversedirection)
Frequent overloadCheck structure 1~2 times per year
Carry out load test once every two year and safety qualification shall be made.