NEW DELHI (METRO RAIL NEWS): The Delhi Metro Rail Corporation Ltd. (DMRC) has issued a Letter of Acceptance (LOA) to M/s REBS Lubrication India Non-public Restricted & M/s REBS Zentralschmiertechnik GmbH. for the availability of Wheel Flange Lubrication system in 64 nos. of practice units of Line-02 in Delhi Metro Rail Company Ltd. together with DLP of two years (inclusive of all consumables”).
- Identify of Work: Contract: ORW-938: Design, Provide, Set up, Testing and Commissioning of Wheel Flange Lubrication system in 64 nos. of practice units of Line-02 in Delhi Metro Rail Company Ltd. together with DLP of two years (inclusive of all consumables).
- Approximate Value of labor: Rs. 4.87 Crore
- Completion Interval: 01 12 months
In June this yr, the DMRC invited tenders for Contract: ORW-938
Scope of Work:
Contractor shall execute full Design, Provide, Set up, Testing and Commissioning of Wheel Flange Lubrication system in 64 nos. of practice units of Line- 02 (Yellow line) in Delhi Metro Rail Company Ltd.
The contractor shall submit the detailed design complying with the technical specification and related drawings earlier than the graduation of labor for the approval of the Engineer-In-Cost.
The association of lubrication shall be offered at wheels of the entrance axle within the entrance bogie of each facet DT automobile in a practice set. The WFL system shall be a standalone system, suitable with present controls within the practice set.
The Wheel flange lubricators of a confirmed design in EMU/metro utility shall be offered solely on the entrance axle of the entrance bogie of either side DT automobile. An appropriate mechanism shall be offered to make sure that lubricators function solely within the main place on the practice actuate suitably throughout traversing of the curves robotically.
The design of the WFL system shall guarantee exact & cyclic utility of lubricant on the flange of the wheel(s) in order that the lubrication utility is uniformly distributed on the flange floor with none extra deposition on the contact floor for avoiding any situation of slip slide. Particular care shall be taken by the Contractor for the setting of nozzles alignment in order that no move of lubricant shall be on the tread/braking floor underneath any circumstance. The system shall be designed to reduce oil and air consumption. A single tube system shall be most well-liked.
The nozzles shall be designed to guard in opposition to choking/clogging as a consequence of mud. There shall be no movable half within the nozzle. The design shall allow optimized management of oil spray in straight and curved observe by suitably modulating the spraying cycles and amount of oil within the spray. The spray cycle as above shall be programmable and shall be fine-tuned throughout subject trials and efficiency of wheels in the course of the Defect Legal responsibility Interval. The programming and mechanical instruments shall be equipped to the Employer (one set for every depot of Line-02, i.e., whole 3 units of instruments) after the top of the Defect Legal responsibility Interval.
Interlocking inbuilt logic shall be made for inhibiting the spraying of WFL when the trainset is in a stand-still place.
The spray of lubricant shall be time managed in addition to distance managed. The actuation and spray cycle and amount shall be determined by the situation and diploma of the curve which shall be communicated to the system by a centrifugal power sensor, coordinates and parameters of curves knowledgeable by the car or/and thru different tools like Gyroscope and many others. able to detecting curves as much as 2 levels.
The contractor shall make preparations to have a sign of WFL performance on the driving force console or as per the instruction of the Engineer-in-charge. The association shall be made for the Practice Operator to isolate the tools in case of any defect/malfunctioning. The design of the WFL system shall be Fail-Secure.
The tenderer shall take into account the Schedule of Dimension (SOD) of DMRC (Broad gauge) in the course of the designing of the WFL system in order that no a part of the system shall
infringe with the SOD relevant for Line 2.
Introduction of Metro Line-2:
Line 2 – Yellow Line (one of many traces constructed and operated by DMRC) is passing by way of one of the crucial densely populated sections of Delhi connecting HUDA Metropolis Centre in Gurgaon (Haryana) to Samaypur Badli in Delhi.
Line-2 had been commissioned in 6 levels, with the first stage being commissioned on 20 th December 2004 and the current stage being commissioned since tenth November 2015.
Presently Sixty-four (64) Practice units function between Samaypur Badli to HUDA Metropolis Centre i.e. Line-2 Yellow Line.
Out of the Sixty-four (64) Practice units working on Line-2 Yellow Line, 62 Practice units have been manufactured by M/s Bombardier Transportation and a pair of Practice units have been Manufactured by M/s Hyundai Rotem.
These 64 practice units are having 8 automobiles every, 8-cars practice consists of a driving trailer automobile with a pantograph (DT), Motor Automotive (M) and a trailer automobile with a pantograph (T).
The principle goal of the challenge is to offer an oil/grease-based Wheel Flange Lubrication System on entrance axles of each DT automobiles for the bottom requirement of lubrication in straight observe & additionally for rail gauge face lubrication on sharp curves in an effort to cut back vibration and to scale back squealing noise at curves of Radius lower than 500 meters.
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