Shanghai Yaqi Lifting Engineering Machinery Co., Ltd

sale the the used L type 20T/5T * 26 meter gantry crane driving, hanging outside six meters. My company is a large number of acquisition and sale of various types of single, double girder, bridge, gantry cranes, and related accessories! While maintenance, maintenance, installation, forensics train services To ensure the credibility! The composition of the crane, the crane is mainly composed of three parts of the mechanical, electrical and metal structure. 1.1 mechanical part consists of the main lifting mechanism, the auxiliary lifting institutions (15t only), the car run institutions and carts run institutions. Including: motor, coupling, drive shaft, brake, reducer, reel and wheels. 1.2 metal structure mainly by the bridge (the main beam, end beams, railings, go station, car track) cab and frame. 1.3 electrical part of the electrical equipment and electrical lines, including the power plant of the crane and agencies starting, speed, change to brake and stop control system. Inspection and maintenance system due to a larger part of the bridge crane for different technical characteristics of the various components in the actual work will be maintenance, inspection cycle is divided into weeks, months, years, each cycle is as follows: 2.1 per weekly checks and maintenance time, inspection and maintenance of the content is as follows: 1) check the brakes on the nut, cotter pins, positioning plate is complete, loose, levers and springs without cracks, the pin on the brake wheel bolt and weekly maintenance and inspection buffer washer is loose, complete; brake braking reliable. Brake is open, the opening degree of brake pads should be less than 1.0mm and should be equal on both sides of the brake wheel distance gap, not stuck to the axle pin. 2) Check the safety switches and limit switches positioning accuracy, flexible and reliable work, especially the rise limit reliability. 3) the checks roll and the wire rope pulley wound is normal, with or without de slot, the phenomenon of string slot, knotted, twisted, wire rope pressure plate bolts are tightened, double nut locking device. 4) Check the fastening screws on the lifting mechanism coupling sealing cap is loose shortage. 5) Check the transmission of the agencies is normal, with or without abnormal noise. 6) Check all lubrication part lubrication in good condition. 7) Check the track if there is a foreign body to hinder the operation of the bridge crane. 2.2 Monthly inspection and maintenance of monthly maintenance and inspection time, inspection and maintenance of content in addition to including weekly content: 1) check the brake pad wear liner amount should not exceed 2mm, pad and brake wheel the contact area of not less than 70%; check each pin mounting position and wear and lubrication conditions, should not exceed 5% of the original diameter of the amount of wear of each pin, the amount of wear of the small shaft and the mandrel should not be greater than 5% of the original diameter and ovality of less than 0.5mm. 2) Check the wire rope wear, broken wire, etc., check the lubrication condition of the wire rope. 3) Check the hook for cracks, wear and tear of the dangerous section exceeds 5% of the original thickness; hook nut locking device is complete, the integrity and reliability of the various parts on the hook group. Hook should rotate flexible, no jamming phenomenon. 4) Check all bolts are loose shortage. 5) Check the motor, speed reducer base bolts fastening and individually fastened. 6) Check the reducer lubrication conditions, the oil level should be within the limits prescribed, oil leakage sites should take measures to prevent leakage. 7) of the gear to be lubricated. 8) check the the balance pulley at wire rope wear on the pulley and the pulley shaft lubrication. 9) check the pulley condition, to see whether it flexible, without damage, cracks, special attention given to the wear of the pulley shaft. 10) Check the brake wheel, work surface uneven degrees should not exceed 1.5mm, should not have cracks in the brake wheel, radial round beating should be less than 0.3mm. 11) Check the coupling, on the key and keyway should not be damaged, loose; the two coupling between the drive shaft axial string momentum should ~~ 7mm. 12) Check the size of the car's running condition, should not produce skew, three-point Wiggler when to start and stop the phenomenon. Check the wheel rim and the tread wear, the wear and tear of the rim thickness should not exceed 50% of the original thickness of the wheel tread wear should not exceed 3% of the original wheel diameter. 13) check cart track to see the bolt is loose, shortages, pressure plate fixed on the track, the track cracks and fracture; gap of two rail joints 1 to 2mm (summer) or of 3 ~~ 5mm ( winter) joints up and down, left and right dislocation is more than 1mm. 14) crane cleaning, clear on the dirt. 2.3 semi-check time and maintain the maintenance and inspection every six months, in addition to including monthly check content should include: 1) Check all reducer gears and wear, pitting of the tooth surface damage should not exceed 30% of the mating surfaces, and depth does not exceed 10% of the original tooth thickness (fixed chordal thickness); percentage of the amount of wear of the gear teeth thick with the original tooth thickness shall not exceed 15% to 25%; checks bearing the state; replace the lubricant. 2) check the condition of the small wheels on the wheel bearings for lubrication, eliminate the skew phenomenon. 3) Check the main beam, the end of each main beam weld open welding, corrosion phenomenon, rust should not exceed 10% of the original sheet thickness, the main force components are fatigue cracks; variety of guardrail, bracket is intact; check main girder, end beam bolts and tighten again. 4) Check the main beam deformation. Check trolley orbit. The main beam under no-load interference should not exceed the span of 1/2000; bend next to the level of the main beam inward measuring length shall not exceed 1/1500; trolley rail track should produce phenomena, track top and sides wear ( one-sided) quantity shall not exceed 3mm. 5) Check the reel, reel wall wear should not exceed 20% of the original wall thickness, the rope groove hump strain tip. 6) Tighten the crane all the connecting bolts and tighten the bolts. 2.4 bridge crane lubrication lubrication to ensure the normal operation, to extend the service life of the component parts, and one of the important measures to improve the efficiency and safety of production. Maintenance personnel should be fully aware of the importance of lubrication equipment, always check the lubrication of the moving point and filling oil lubrication points (grease) on a regular basis. 2.4.1 Danjiang power plant bridge machine lubricating parts (1) bridge crane hoist; ② various bearings; ③ The gear couplings; ④ reducer; ⑤ wire rope; ⑥ brake on the hinge point. 2.4.2 Lubricating Note 1) to maintain the cleanliness of the lubricant (grease); 2) Do not mix different brands of lubricant (grease); 3) selection of a suitable lubricant (grease) to lubricate the stipulated time; 4) pressure greasing Act (the grease gun or pump, capping oil cup) add grease, the grease pushed the friction surface, the friction surface to prevent his hand not enter; 5) wet areas should not choice of sodium grease, because of its strong hydrophilic likely to fail; 6) the agencies no oiling points rotating parts, should be regularly used to dilute oiler in each rotation gap in order to reduce mechanical friction and prevent corrosion.

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