hoist crane maintenance and repair

1, lubrication
The lifting mechanism and the Hoist crane performance largely depends on the life of lubrication. See their manual lubrication, maintenance, lubrication, mechanical and electrical products, go carts, chain hoists truss vehicles grease injection once a week. Rope off the case should pay attention to. If broken wires, broken or worn scrap volume, should be replaced with new ropes. Expander
Spreader must be checked regularly.
2, pulley block
Wear the main rope groove, with or without rims crack in the shaft and the pulley has no clogging. Periodically checking the bridge crane wheel wear and tear or crack up to 10% of the thickness of the peripheral edge portion of the tread and the wheel flange should be replaced with a new wheel.
3, the brake
Each class should be checked once. Braking action to be accurate, this Electric hoist crane pin must not be stuck phenomenon. Shoe should be the correct fit of the brake wheel, brake shoe clearance should be equal.

hoist crane inspection and maintenance Weekly

 Maintenance and inspection once a week, inspection and maintenance of the following:
1) Check the hoist crane brakes on the nut, cotter pins, positioning plates are complete, loose, leverage and spring no cracks, pin bolt on the brake wheel and cushion washer is loose, complete; brakes are reliable braking. The opening of the brake pad to open the brake should be less than 1.0mm and with both sides of the brake wheel clearance distance should be equal, each axle pin may not have stuck.
2) Check the safety switch and limit switches are accurate, flexible and reliable work, especially rising limit is reliable.
3) Check the wire rope wound on reels and pulleys are normal, with or without removal slot, string tank, knotted, twisted and other phenomena, rope plate bolts are tightened, whether a double nut locking device.
4) Check the Hoist gantry crane fastening screw lifting mechanism on the loose coupling closures, shortages.
Drive 5) Check the body is normal, with or without abnormal noise.
6) Check all lubrication lubrication condition is good.
Are there foreign body obstruction machines running on the bridge 7) Check the track.

overhead crane engine optimization design

  Engineering and mechanical power transmission system optimization is an important way to reduce fuel consumption by optimizing the design , load sensing control , the effective power and power distribution reasonable use of the engine , the engine power output is always in the best condition , and to XinXiang Crane overhead crane engine safe protection status under harsh working conditions .
  This technology has now become an international competition highlights engineering machinery , as well as China's construction machinery industry in the " Twelfth Five-Year " period for energy conservation, improve the added value of an important development direction of product technology , especially large wide range of mainstream products, market demand, the fuel guzzler , should serve as a bridge crane industry change the growth mode of the key tasks of a good job , to carry it out .
  Most of the domestic construction XinXiang Crane overhead gantry crane mastered the core technology in a number of supporting foreign enterprises from key components to the system , most of them are imported from abroad. The main reason is foreign to the relevant components and technology research has for decades or even centuries of accumulation, while domestic enterprises are mostly from the overhead crane in the 1990s or even late begun to work in this area , the gap not a short period of time can be eliminated.
   So , seize the development opportunity of dynamic mechanical bridge crane , has great significance for narrowing the gap with foreign engineering machinery products and improve their competitiveness .

Grab hook type gantry crane operation safety hazards

"One machine can" in order to improve the efficiency of loading and unloading operations, streamline operations, reduce personnel manual labor, improve security operations security, but also improve the existing gantry crane is an important means of utilization. sino hoist Therefore, different varieties of packaged goods Soca tools, such as grab, timber grab, container spreader, steel hooks, coil clips, etc., hanging on the door to get the promotion and application success. Any use of Soca with, the necessary conditions to ensure personal, equipment, cargo security. But the recent detection of a gantry crane found in the station, the station a 20/10 t C-type door grab crane during operation, there is a more serious overload of work, but whether it is management, or the use of staff has neither aware of the existence of overweight. According to the survey, hoist gantry crane the railway yard gantry crane using four rope grab operation, almost all such problems exist. When equipped with grab, no matter whether the change in varieties of goods, grab generally unchanged.

Gantry crane

Is an important branch of general sino hoist machinery , as stevedores to reduce labor intensity and improve the conditions of workers to operate and improve the production capacity of loading and unloading of large lifting and handling equipment , widely used in the open-air yard , storage terminals , railway stations , construction sites and other places. With economic development , it is not only occupies an important position in the national economy , but also in the field of social production and life are also expanding. Main beam is the main force component gantry crane under load , will produce under torsion deformation, trolley tracks a certain slope, so the car climbing resistance generated by the main hoist gantry crane beams running across the middle to the ends , it may cause motor overload or gnawing different degrees rail , seriously affecting the crane to work, and even lead to accidents. Currently, the way to solve such problems in the industry are designed and manufactured the crane when the main beam geometry on a certain arch . In fact , this is also not reasonable arch curve , the same slope to overcome considerable resistance because when the car is running near the legs , and, after working for some time on the camber deformation will gradually reduce , or even disappear. This paper attempts to take advantage of changes in the height of the main beam deflection legs to compensate for deformation under the influence , combined with the finite element analysis software ANSYS simulation , and achieved the expected results.

Truss gantry crane

With light weight , small frontal area , large carrying capacity and other characteristics, are widely used in factories , railway stations , ports, power plants, construction sites and other steel crane areas of production. Rationality and reliability of its security architecture design , and the ability to work directly determines the efficiency of the crane . Now most companies by virtue of experience to design truss gantry crane , the utilization of steel is low, and detailed design calculations and relatively cumbersome. Therefore, the steel truss crane design and analysis , has become the focus of design in the field of research , and the main beam is a major part of the door frame . In this paper, the use of modern design methods, lifting the total mass of 60 t, span 40 m, lifting height of 16 m, main beam structure hoist gantry crane working-level A3 truss gantry crane optimization. Main beam structure optimization mathematical model of optimization objective function optimization goals gantry crane metal structure is the total mass of the smallest structure itself , which is a parameter VOLUME minimum value . Design variables need to optimize the design variables are independent variables objective function and state function . Optimization process is optimized by constantly changing variable values ​​to achieve. Truss girder gantry crane main components, mainly steel, link8 unit can be modeled .

Vertical and horizontal gantry crane dynamic stiffness

Vertical and horizontal gantry crane dynamic stiffness Ge-Ning Xu . Tsui Hark Jin ( Department of Mechanical Engineering ) Abstract gantry cranes for different types of vibration analysis conducted research , presented a series of practical formulas gantry crane vertical and horizontal dynamic stiffness , add a calculation method static and hoist gantry crane dynamic stiffness , expanding the door crane static , dynamic stiffness range checking for gantry crane characteristics and analysis of existing research data , it is recommended that the static and dynamic stiffness control value for the realization of dynamic design gantry crane has created favorable conditions . Keywords gantry crane , the dynamic stiffness of the CLC TH2; TU390 Introduction gantry cranes (the door ) is an important Lifting Equipment Yard steel crane national economic departments , warehouses and assembly plant widely used , it can be divided into single girder trolley hoist gantry crane and standard double girder gantry crane trolley two types , with the corresponding divided into single and double girder gantry girder gantry two structural types ( Figure 1 (c), 1 (e) and 1 (d)), divided into a leg frame (Fig. 1 (c), 1 (d)) and L (Fig. 1 (e). door according to the size of the span。