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。

Design and implementation of a three-dimensional virtual gantry crane system of automatic control

21st century information engineering has achieved unprecedented development , computer technology as the core technology has been widely applied to various fields of social life . Virtual reality technology as a cutting-edge computer science technology, broadband networks , high-tech multimedia and integration of artificial intelligence , sino hoist the continuous development of technology, the construction of a virtual laboratory became possible to establish virtual experiments can greatly promote education development of information technology to improve the level of education development in China , especially for relatively scarce educational resources in the western region is more important. Currently virtual laboratory use more two-dimensional plane design approach , in terms of experimental realism, interactivity and teaching and the reality falls far short of the experimental effects , can not meet the needs of actual teaching. With greatly enhance the development of computer graphics technology and computer graphics performance ever achieved only on high-performance computer desktop virtual reality can now also running on an ordinary personal computer , virtual reality technology thus hoist gantry crane unprecedented popularity extent , also brought new vitality to the development of a virtual laboratory . This paper analyzes the drawbacks of traditional laboratory summarizes research status at home and abroad in terms of virtual experiments , the background to the process control laboratory for experimental teaching process automation professionals - tank experimental research.

Common Assembly hoist crane

Bridge crane assembly is a very common means of transport, in ports, warehouses , construction sites and other places have been widely used. However at runtime overhead crane , trolley load swing caused by the games , which would reduce the efficiency of oscillating the one hand, the crane system , and on the other hand may cause the load of the operator or other steel crane objects caused by injury or collision loss. Therefore, many scholars overhead crane system controls a lot of research work : ask the car quickly and accurately reach the target position , on the other hand also requires the ability to effectively suppress the swinging of the load. The most common method of controlling open loop overhead crane shaping the input (Input Shaping), but this method requires high precision of the system parameters , and thus more hoist gantry crane to solve the closed-loop control and suppress the swing carriage positioning problems. Chang et fuzzy logic main bridge crane in a position to meet the accuracy requirements of the swing angle suppression . Fang Yong, et al pure energy -based control method , by increasing the dynamic coupling between the trolley and the load characteristics to achieve good control of the cable car system ; several advanced nonlinear control methods which are applied to the overhead crane system .

Electric eot crane hoist installation methods described in detail

First, you need to install the sino hoist box ; Second , connect the power cord to connect the power cord to be cut off in advance. While the ground should be well grounded , otherwise touch any part of the operator or chain hoist , may feel a shock feeling. Third, the degree of load chain lubrication chain lubrication chain hoist load chain is an important factor affecting the service life . Timely and effective lubrication of the effective life of the load chain , in order to ensure the chain. Fourth, check the chain hoist gantry crane for multiple lines of electric chain hoist chain should ensure that aircraft are not under the hook flipped . If you flip to restore it to a normal state, to ensure that the chain of weld arranged in rows . Do not twist the chain hoist hanging loads. Finally, check the operating voltage due to electric chain hoist factory , is based on user-specified voltage or high voltage equipment ( only dual voltage terms ) , such as 230/460V, need to check the wiring and make sure the power supply voltage meets requirements. If not, please refer to the manual must be corrected in order to meet the requirements of the operating voltage .

Introduction to the electric hoist gantry crane girder production technology (box)

With the continuous development of social hoist gantry crane development, the manufacturing level has been rapidly improving. Electric hoist gantry crane is an indispensable equipment in building materials market, the manufacturing quality of high and low, directly affect its performance. Especially the metal structure manufacturing quality, plays an vital role in the safe use. Now to the rated lifting a total quality of 10 t electric hoist gantry crane as a case, introduced the production technology, hoping to play a good reference for similar projects. The related technical parameters are as follows: electric hoist gantry crane: rated lifting the quality of 10 t; Design chief, 36 m; Door leg span 24 m; Hoisting height 9 m; The beam width 6 m; Single girder structure, the door legs into the "eight" glyph stress; 4 wheel bearing, two-wheel driven. Whole steel crane body into the box structure is long and narrow shape, the girder web plate thickness is thinner, weld, and mainly concentrated in the top side, large amount of welding. Which is the most difficult to control point is: the main girder camber, web verticality, lateral bending, and 24 m span. Because the making craft of main girder has certain representativeness, door for other structures such as beam under rigid legs, manufacturing has important reference, in the only for the three of the crane structure of main girder of the production process, talk about manufacturing technology and quality control.

The safety of the crane operation technical requirements

Crane belongs to a large hoisting equipment, if the operation is easy to be imprudent man-made accidents, so care must be taken in the operation, the safety of the follow certain principles. Below is to explain the safety of the crane operational technical requirements:
1) check 怍 industry field. The field to flat, can not have inclination and muddy. Flexible leg, work with plate bearing (board size is 400 x 400 x 400 mm). The scope of work you have plenty of hoisting, rotary space.
2) and leg: put a leg, you must hoist gantry crane put telescopic legs after put lifting leg, the leg in a horizontal direction stretch out first, and then to leg down to the ground, until when will frame set up; For legs, you must first accept lifting leg contraction after telescopic leg. Order release can't mistake, otherwise, will produce the oil pipeline rupture or other accidents such as adjust the leg in the lifting operation, should be steel crane again after unloading, it is strictly prohibited to lifting weights adjustment after a hurricane.
3) homework before, it was with tightened hand brake, the gear lever in the neutral. Start the engine preheating operation to normal temperature.
4) for air brake of heavy machine, assignments, climb to 600 kpa pressure, turn the gas shift control valve, the oil pump operation. To adopt pump in diesel engine under no-load running rapidly after 2 min, before lifting operations.
5) before each assignment will try hanging, namely a heavy lift off the ground 50-100 - mm, inspection and the reliability of the actuator, estimated load condition, monitor the stability of the leg. Such as cushion flat leg below rough available block, block size is not less than 400 * 400 * 80 mm.
6) during the lifting operations, steel wire rope should be kept vertical, are not allowed to be inclined and horizontal hanging, lest the machine capsized.
7) when punching bag high weight, asked the hook with a pulley should keep a certain distance, in case of winding limiter failure caused by wire rope tensile or rear suspension arm. To not drop limit position limiter crane, steel wire rope on the drum is allowed to put all in work, should retain 2 ~ 3 laps, to end off the prevention and control of wire rope.
8) general crane boom in the front fan arc zone can't operation, as shown in figure 4, 23. But there is my factory production of truck crane, double H leg, additional fifth leg, namely after the first leg, expand its operating area, can achieve 360 ° full rotation