Bridge crane

When the load on the main girder span camber should be F = LK1000 (0.9 ~ 1.4) (wherein LK-based beam span), but the crane in use, often due to overload, thermal radiation and repair bridge gantry crane irrational factors such as main beam camber disappear. From a city crane factory to investigate the plant manufactured products tested 106 quay cranes situation, the result is the use of the arch disappeared after 1 year, 2-5 years 20% of the arch disappeared 30% to 50%. use 5-10 years more than 60% on the arch disappeared almost entirely disappeared more than 10 years, and produce under torsion, seriously affecting the safety in production. Disappearance of the main beam camber is essentially metal structure deformation. This will cause a malfunction size car run institutions, resulting in wheel overhead gantry crane size skew span error increases, which will affect the smooth operation of the trolley car safety gauge changes, the size of the car, "bite the Road" serious phenomenon. Main beam deflection will produce severe lower level next bend plate waves increases.

Overhead crane parameter identification based on energy conservation

Two degrees of freedom of the bridge crane , due to the driving characteristics of a system input that transport overhead gantry crane the crane swing accompanied the load, which increases the difficulty to accurately position the load handling control . Around the bridge crane anti- sway control launched a lot of research . Presents a hierarchical sliding mode control method , the system state is divided into two groups were constructed sliding plane, control the amount of each sub- sliding surface contains the equivalent control component so as to ensure the system state of each sub- sliding along the slip plane . The establishment of a fuzzy control system, four-input single-output fuzzy controller is optimized for two pairs of input single-output fuzzy controller and a weighted composite of the two outputs. Prediction and compensation based on disturbance eot crane feedforward and feedback controller is designed to effectively eliminate the influence of nonlinear friction of the cable car system. However, numerous studies including the above literature , including both known to stay in the assumed model simulation stage , and no model parameter identification in-depth study . Mathematical models for controller design overhead crane is very important , so the controller based on a simple model structure obtained applications. Common method of system identification of an energy law and CAD models. Accuracy of the components illustrated AutoCAD CAD model method relies on the system , the process can not be accurate.

The main components gantry crane

The main components gantry crane: According to industry standards GB/T14406 requirements, gantry crane overhead gantry crane mainly consists of the following components

A cylindrical wheel

2, buffer

3, block brake

4, rope

5, lifting bridge gantry crane hook

6 cab

7, reducer

8, casting pulley

9, casting reels

10, the motor

11, electronic control equipment

Pendulum control method based on anti- sliding eot crane system

As an important bridge crane lifting and transport machinery , in industrial production has been widely used. Controls for overhead cranes are often required for control accuracy , speed and other aspects of a comprehensive anti- pendulum consideration . Trolley horizontally moving the motor by direct control , and therefore the speed and movement of the trolley is easier to achieve precision control . contrast, anti- swing bridge crane system, the crane is often difficult to achieve . mainly due to the swing of the load acceleration, deceleration, and outside interference caused by anti- swing control for crane operation safety is often crucial. currently , research on the overhead crane system has many times the minimum time control of overhead crane systems , using overhead gantry crane method gives an object-based model anti- swing control strategy ; adopt minimum time control thought , would bang-bang control of a group of switching time is defined as the value of a new variable , and through a set of fuzzy control to find the optimal switching time sequence ; study is crane model of a linear time-varying, also uses the optimal control strategy and the characteristics of varying parameters for the object presents a variable feedback gain state feedback control law . currently , intelligent control systems in the crane also has some applications.

Structural design of light electric chain hoist

Henan Nanyang Polytechnic Institute was opened Rui Machinery Co., Ltd. has developed a new type of electric hoist. The product is optimized for improvements made on the basis of HSZ-10 chain hoists on . The new hoist has the following features: disc brake overhead gantry crane replace HSZ-10 chain hoists and hand brake part zipper part , brake sensitive, accurate , and reliable. Planetary gear reducer deceleration torque increases , the planetary gear reducer drive ratio , small size , light weight, safe and reliable. A torque limiter to prevent overload , the motor and transmission disc protection from damage , but also to ensure safe lifting . HDH type 10 t electric chain hoist assembly drawing. Electric chain hoist structure and product type bridge gantry crane chain hoist from the motor, transmission and wheel components , and wire rope hoist the biggest difference is replaced by the rope chain, wire rope hoist to make up a larger volume , more cumbersome shortcomings. Weight is generally 0.5 t (60 type ) , lifting height is 3 ~ 120 m. At present , the domestic electric chain hoist mainly DHY series electric chain hoist and fast small teeth difference reducer electric chain hoist two kinds [ . DHY series electric chain hoist with fast disc brake motor as the driving force.

Finite element hoist crane of complex multi-function wheel with guide workshop steel crane girder crane system

Versatile crane electrolytic production process is the key equipment . The difference between the ordinary crane crane structure itself versatile domestic industrial plant is widely used in large , multi- crane plus ends of the car with a plurality of transverse , and the asymmetry is arranged at one end of the crane , which class versatile bridge gantry crane load is large, and different from ordinary cranes , and used very frequently . Therefore, the steel crane girder crane multifunctional role under the mechanical performance analysis, to understand the mechanism of the force in a complex crane girder crane loads have some practical value. To this end, this paper carried out the following tasks: simulation by ANSYS finite element analysis software to extract different spans , the internal forces versatile crane girder structure under different braking load cases and load case a second role in cross-section at the most unfavorable value. Referring steel design specification design criteria ordinary steel crane girder overhead crane , the crane beam steel for multifunctional system for strength , deflection, stability checking, and the amount of steel girder crane multifunction system evaluated. By ANSYS finite element eigenvalue buckling analysis , taking into account different load cases , different span space model for multi-purpose steel crane girder system for elastic stability bearing capacity analysis, the linear elastic phase overhead gantry crane steel crane girder system buckling load and instability mode . Bridge project in lifting machinery used , depending on its construction and performance, can be divided into small light lifting equipment , lifting machinery and bridge type jib type crane three categories. Small light lifting equipment such as jacks, electric hoists, winches, etc. . Girder bridge type lifting machinery such as cranes, gantry cranes. Such as fixed jib type crane slewing cranes, tower cranes, truck cranes and wheeled , crawler cranes.

The composition of steel wire rope electric hoist

Part of the wire rope electric hoist are: motor, overhead gantry crane mechanism, drum and sprocket. In the motor and the drum position different can be roughly divided into four types.

(1). Currently has no manufacturer production product of this structure

(2) electric hoist motor axis parallel to the roll axis, its advantage for the height and the length of the small size. Its shortcomings for the width size is big, grouping, manufacturing and assembling complex. Track turning radius is big.

In the inside of the drum (3) motor electric hoist, the advantage for the length of the small size, compact structure. Its main shortcoming for motor cooling condition is poor, poor grouping and inconvenience, bridge gantry crane, installation, maintenance, motor power supply device is complicated.

(4) the motor installed on the outside of the drum of the hoist, the advantage for group sex good, high degree of generalization, easy change hoisting height, easy installation and maintenance. The downside is: the length size.

Lifting equipment performance parameters

Lifting equipment performance parameters
Hoisting machinery basic working ability is theoverhead gantry crane performance parameters of weight and level of work. (1) the weight is under prescribed conditions allow the biggest weight lifting, namely rated lifting weight. Generally with magnetic chuck (see lifting sucker) or grab crane, the lifting weight should also include magnetic chuck or the weight of the grab bucket. Boom type crane lifting weight includes the weight of the hook set. (2) the work level is reflect the performance parameters of hoisting machinery general work situation, is to design and choose the important basis of hoisting machinery. It is composed of hoisting machinery bridge gantry crane to be completed within the required during the use of the work cycle of the total number and load condition to decide. The international organization for standardization (ISO) could be divided into 8 hoisting machinery work level. China will only crane is divided into 8, small light lifting equipment, elevator, overhead monorail system has not yet been classified. The operational procedures for strong regularity, repeatability large hoisting machinery, such as dock cranes, loading and unloading ships goods warehouse stacker crane and elevator for blast furnace feeding hopper, the cycle time is also an important parameter. Work cycle refers to complete a working cycle time, it depends on the working speed of the institutions, and related to the transportation distance. The crane is also sometimes use productivity as the important parameters, usually expressed complete crane capacity per hour.

The traditional two-dimensional CAD for the design of the crane

With traditional two-dimensional CAD design of crane time cycle is long, repeated design, product innovation is insufficient, the engineer's design experience is not very good inheritance, makes the design efficiency of series of products is not ideal. Bridge crane is designed to experience of design, development, evaluation, manufacturing cycle repeatedly, the process time is long, and the design cost is high, the efficiency is low, the risk is big. And the use of modular design, through the component level, generalization and standardization can simplify the product structure, make the product diversification. At the same time using the overhead gantry crane design of gantry crane and 3 d parametric modeling technology, can reduce repeated labor and improve the design efficiency, make products to satisfy user needs. At the same time using an interactive simulation technology, the bridge crane driver's operating system can be virtual simulation, set up the corresponding effects, truly simulate the crane work and working conditions, to predict the potential risks in the working process of the bridge crane, and can improve the work efficiency of bridge crane. bridge gantry crane as interactive simulation tool, has great advantages in terms of interactive simulation. Through the driving of bridge crane operating system in virtual simulation, 3 d model to realize the keyboard control, the man-machine interaction effect.

Bridge crane in horizontal plane in workshop

Bridge crane in horizontal plane in workshop, warehouse, etc, is hanging objects of machinery and equipment, also referred to as the "road" or "crane". Bridge crane is widely used in industrial and mining enterprises, port, wharf, construction site, warehouse, station, bridge gantry crane development, space navigation and so on all walks of life, in the process of our modernization construction plays a huge role. Tin metallurgical industry crane is the main equipment, production plant transport material metallurgy bridge crane has to adapt to bad working environment and high load operation efficiency is high, the level of work, study of bridge crane has a overhead gantry crane significance to the development of metallurgical industry. Profile bridge crane bridge crane is one of the main types of crane, because of its running at high altitude, scope of operation that sweeps across the whole factory area, almost got rapid development. Bridge crane accounted for about 90% of the number of indoor crane, hoisting machinery is the so-called "largest production batch, the material consumption of the product. The classification of the bridge crane in order to adapt to different work situations, bridge crane appeared a variety of types. Currently, depending on the bridge crane structure form, it can be divided into electric single beam cranes, electric hoist bridge crane, gm bridge crane and other types.

Lines exist in electric hoist gantry crane

Crack exists in electric hoist gantry crane on beams, cracks are mainly concentrated in beams and girders connection parts and beam connected to the leg on the parts of the parent bridge gantry crane or weld. 2 causes the crack part stress state is complex, such as bending stress and shear stress and welding stress, both to carry hoisting load and dead weight load overhead gantry crane by the bending stress and shear stress, and at the same time, the operation of the lateral load, big, the car braking inertia load and wind load, and so on. Stress is larger, therefore, the local synthesis with cantilever crane, the load on the cross and cantilever end beam weld on both sides there are alternating stress and angular distortion in the opposite direction, combined with structural reason is easy to produce stress concentration, and therefore part of weld and parent metal under alternating stress and stress concentration susceptible to fatigue damage. Design flaws in the side of the leg on the top of the beam by two independent small box girder (or i-steel) structure, as shown in figure 1. Causes of crack for stress concentration, uneven force and stiffness. 8 of this type of crane in our city in the cracks without exception, the shortest using only 3 ~ 4 months appeared crack, crack of the other in a test cycle. Beams on the independent structure crack distribution material crack, crack on weld beam bending crack.

The starter overrunning clutch

Starter overrunning clutch is the key overhead gantry crane of motorcycle electric starting system, is also a weak link, the startup process directly affects the working performance of the starter motor. Compared with the usual clutch, the axis of rotation to the starter overrunning clutch has advantages of convenient maintenance and low cost, which is widely applied in various types of motorcycles. With the ordinary starter bridge gantry crane clutch driven by an electric fork compared with the workings of a flywheel ring gear meshing axis of rotation to the starter overrunning clutch is to use the starter motor clutch rotation inertia force of its own cause and flywheel ring gear meshing. Therefore, the start characteristics different from those of ordinary clutch start characteristics, and the domestic research is still less. Article set up the axis of rotation to the starter one-way clutch, the mathematical model of the boot process, using MATLAB/Simulink simulation model is set up, the result of the experiment and simulation was consistent, verify the correctness of the model. On the basis of the study the influence of structure parameters on the starting characteristics of the clutch, which provide complete for design and optimization of this kind of new clutch

Double beam bridge crane visual design

Double beam bridge crane visual design: bridge crane is widely used in industrial production process, with the development of the progress of science and technology, overhead gantry crane technology and the increasingly fierce market competition, the quality of the design of the crane and the efficiency is higher and higher demands are proposed. Traditional bridge gantry crane technical personnel in the bridge crane design, especially for the design process requires a lot of manual calculation, drawing, design process repeatedly, long cycle and low efficiency; And the optimization design, often also is not intuitive, is bad to adjust, often cannot meet the needs of the series design or special requirements. We can in the visualization technology of crane CAD design, combined with the optimization, through the program design, improve the design speed, shorten the design cycle, to improve product performance and reduce the production cost of the products series product development design and play an important role in such aspects as non-standard design. Double beam bridge crane of visual design using computer graphics, visualization is to convert data into graphics displayed on the screen, make the process visual indication of methods and techniques.

On both ends of the bridge by running the device directly support in the elevated bridge type crane on the tracks

On both ends of the bridge by running the device directly support in the elevated bridge type crane on the tracks, referred to as the "bridge crane". Shaped like a two-terminal bracing in overhead gantry crane parallel two overhead orbit running single span slab bridge. Lifting mechanism is used for vertical lifting objects, the classification of the bridge crane, gm bridge crane. To grab bridge crane are gm bridge crane. Grab bridge crane, laying track crane truss string directly. The construction bridge gantry crane shall be the same as the continuous crane beam. Heavy duty crane beam, the flange and the column or brake on bit plane passing horizontal force of friction type appropriate USES high strength bolt connections, and BuYi flange connection with brake beam, friction type high strength bolt connection can be used or weld connections.

A computerized model to optimize location of a group of tower cranes is presented

A computerized model to optimize location of a group
of tower cranes is presented. Location criteria are balanced workload, minimum likelihood of bridge gantry crane with each other, and high efficiency of operations. Three submodels are also presented. First, the initial location model classifies tasks into groups and identifies feasible location for each crane according to geometric ‘‘closeness.’’ Second, the former task groups are adjusted to yield smooth workloads and minimal conflicts. Finally, a single-tower-crane overhead gantry crane model is applied crane by crane to search for optimal location in terms of minimal hook transportation time. Experimental results and the steps necessary for implementation of the model are discussed.  Crane location models have evolved over the past 20 years. Warszawski (1973) established a time-distance formula by which quantitative evaluation of location was possible. Furusaka and Gray (1984) presented a dynamic programming model with the objective function being hire cost, but without consideration of location. Gray and Little (1985) optimized crane location in irregular-shaped buildings while Wijesundera and Harris (1986) designed a simulation model to reconstruct operation times and equipment cycles when
handling concrete. Farrell and Hover (1989) developed a database
with a graphical interface to assist in crane selection and location. Choi and Harris (1991) introduced another model to optimize single tower crane location by calculating total transportation times incurred. Emsley (1992) proposed

Electric hoist gantry crane is a kind of electric hoist bridge crane deformation

Electric hoist gantry crane is a kind of electric hoist bridge crane deformation. The electric hoist crane can be divided into electric hoist gantry crane and electric hoist cantilever gantry crane structure of two kinds of forms. Electric hoist gantry crane and can be divided into: the gantry overhead gantry crane and gantry crane. The electric hoist can be divided into the double cantilever gantry crane cantilever gantry crane and two single cantilever gantry crane. Electric hoist crane is divided into a variety of. This q good electric hoist and electric hoist gantry crane main difference is that electric hoist is a small-sized lifting equipment, it is divided into wire rope electric hoist and bridge gantry crane electric hoist. Chain electric hoist is mainly divided into two kinds of imported and domestic electric hoist electric hoist. Wire rope electric hoist is mainly divided into: CD type wire rope electric hoist and MD1 wire rope electric hoist and riot, metallurgy, electric hoist, electric hoist There is a miniature wire rope electric hoist, hoist, multi-function winder.

is laid on the orbits of the horizontal run, constitute a rectangular scope of work

Bridge crane is a bridge in high orbit a bridge typebridge gantry crane, also known as the crown. Bridge crane bridge along the laid on on both sides of the elevated rail longitudinal operation, lifting trolley along the bridge is laid on the orbits of the horizontal run, constitute a rectangular scope of work, can make full use of bridge the space below the lifting materials, from the ground equipment obstacles. The characteristics of the bridge crane can be made on a hook or other fetch device weight implement vertical or horizontal migration in space. Bridge crane including: lifting mechanism, big, the car run institutions. Rely on these institutions cooperate with action, can make the weight in a cube space lifting and handling. Bridge overhead gantry crane, gantry crane, gantry crane, metallurgical and cable crane and so on all is such.

Electric double girder crane is composed of what conditions?

Now with electric double girder  bridge gantry crane  on the market is that people pay greater attention to the product, along with its reputation in the market, so good, along with its development speed so fast, the effect is so good, so people also prefer to use their in the course of its use are generally more comfortable, which is a feature of its relatively large, in the course of its use, there are many companies on the electric double girder cranes are more optimistic, and think it is useful potential for development, so its frequency of use is relatively high, so now is the electric double girder crane what conditions constitute it?
1 electric
As the electric double girder  overhead bridge crane  certainly constitutes the most important condition is electric, and generally in the course of its electric operation is automatically operated, generally able to automatically operate product is loved by a lot of people, under normal circumstances so much loved by the odds are not great, unless it is one of their more optimistic or is it in the market has developed over the years, and only in this case will have electric products, so that the electric products on the market is are more useful.
2 double beam
General Electric double beam crane for its use in the process often comes in many forms, the forms, the more the more it is advantageous for the product, so that the more the more favorable product better able to survive in the market this is inevitable, so the electric double girder  overhead gantry crane  is more of a product to make it feel comfortable.
This is some of the electric double girder crane constitute conditions.

How to treat electric double girder crane it?

Is now on the market for electric double girder  Steel crane   are to be properly managed, like this mechanical equipment if you do not manage them properly or in the use of the time to pay more attention, be careful, it may be more time broken short, because the pressure is too large or super overdraft work will make electric double girder crane on the market cut short the life of the moment, so that you want to extend the life of the electric double girder crane that is relatively good, so now how to treat electric double beam crane it?
1 Installation
Installation is now on the market using electric double girder  hoist gantry crane  products business is more general in its use of the process is more useful, like this large product development hope is relatively rare, but the electric double girder crane is one of them, at the time of its installation are more installation requirements, under normal circumstances in the process of installing them is a more demand, but the installation also requires a process, and can not at once installation is complete .
(2) Maintenance
Treat electric double girder  overhead gantry crane  at the time is the need to take good care of them, because in the course of its maintenance is relatively good, the better the general maintenance of life will seem longer, only in this case the following can appear a little better, maintenance of good product development, the better.
This is the kind of electric double girder crane in several ways.

Accelerate the high-end engineering machinery and equipment R & D capabilities

     Current by the introduction of advanced technology , high-end products still rely on imports of China's equipment manufacturing industry is facing the harsh reality . High-end machine tools , high-end engine , high-end instrumentation and control systems , need from abroad .bridge gantry crane Among them, 90% of imports of high-end CNC machine tools , CNC system 95% of imports , imports 70 percent of instrumentation . In the field of infrastructure components for high-end CNC machine tools supporting 70% of high-end features need to import large construction machinery hydraulic parts required for all imports above 30MPA , speed of 200 km above the gear box , 2.5MW wind turbine gearbox above , large-scale coal gear box , high speed train brakes, large shield machine electro-hydraulic drive unit , almost all imports . Although in terms of marine diesel engine with advanced foreign enterprises to develop a joint venture , co-production , but the key core technology and brand still rests in the hands of foreign enterprises ,overhead bridge crane not to get rid of "wage " type of processing and manufacturing position.
WangRuiXiang stressed that China's equipment manufacturing industry , the most important thing is to accelerate independent research and capacity building. Countries on the one hand to find a way to give policy support, on the other hand to integrate resources , technology research organization . "At present , China's research institutes strength is still very fragmented, should think of ways to integrate focus areas , universities should also consider how to get involved in. I believe the strength of several organizations together, our country will be able to gradually break through the technical bottleneck breakthrough high-end equipment manufacturing monopoly status of foreign enterprises , and gradually form a high-tech for the lead, in the value chain and core aspects of the industry chain , to enhance the core competitiveness of the industry 's high-end equipment manufacturing industry . "
Similarly, the CPPCC National Committee, the National Machine Group Co., Ltd. Chairman Ren Hongbin also pointed out that the current level of China's equipment manufacturing industry, compared with foreign countries there is a big gap that needs some investment and policy support , the level of development of high-end equipment manufacturing industry enhance up . High-end equipment to change our international competitiveness is not strong , a higher degree of external dependence situation. The National People's Congress , Chery Heavy Industries Co., Ltd. General Manager Wang Jinfu it is said that "high-end equipment manufacturing, to big to say , a symbol of a country's core competitiveness , involving the country's economic and national security ; talked to the small , many industries and enterprises related to the survival and development . " acceptance , including " China joint Business News ", including a media interview, said that over the past decade , the rapid development of China 's  overhead gantry crane  industry , China has become a veritable equipment manufacturing country , but also not the equipment manufacturing powerhouse ; but to achieve " from large to strong " dream, must enhance the independent innovation capacity, accelerate the development and promotion of independent high-end equipment manufacturing industry .