Gantry crane (or overhead gantry cranes)

Conveying way timber haulage ways according to the type of timber, storage size, topography and covers an area that is selected regional requirements, which is currently being conducted among domestic experimental study and gain experience. Now introduce hoist gantry crane several major haulage way. Large timber gantry crane haulage storage sites use more gantry cranes (or overhead gantry cranes) stacking, unstacking, pulling wooden machine horizontal transport, or bridge crane stacking, steel crane unstacking to pull the wooden horizontal transport aircraft fitted. Conveying medium-sized timber frame bar semi-mechanized transport field, then use more stacking frame bar.

Bridge crane girder

On the main beam camber arch girder bridge crane concept refers to the bridge at both ends of the beam on a plane as a reference , the main beam relative to the plane of the beam end bent upward plane. Max crane girder span bent upward at the center of the main beam , the maximum value on the center of the arch is called the camber of the main beam . Camber on the direction of the main beam length of each part of the camber of the track known as the main beam of the curve, or simply camber line. The sino hoist size and shape of the camber curve crane main beam camber on the manufacture and use of cranes are two important technical conditions . Carrying trolley bridge crane in the main beam is running, if the main beam inelastic deformation , the car is always on a straight track running, which is the best , but in fact this is not possible , because the main beam is an elastomer. If the crane made ​​of the level of the main beam , the crane when under load , the position of the main beam load is bound to produce a downward bent , that hoist gantry crane under the so-called main beam deflection . This time as the car runs across the end of the cross , the car itself will likely slip , running instability phenomenon ; And when the car runs across the end of the span to occur when climbing phenomenon , the running resistance of the car increases easy burning motor . On the other hand , if there is a large main beam under torsion , also worsen driving conditions carts run institutions.

Double girder truss gantry crane

With economic development , it is not only occupies an important position in the national economy , but also in the fields of production and life are also expanding. Weight 160t double girder truss gantry crane gantry steel accounted for more than 60% of the whole weight is an important part of the whole crane engineering system design. Rationality and sino hoist reliability of the safety design of steel structures directly determine the ability to work and quality of work cranes ; while irrational steel design parameters will reduce the utilization of resources. Therefore, the gantry crane steel structure design and analysis has become the focus of the design in the field of research . Aiming at this situation , the use of modern design methods , conduct research on the optimization of a shipbuilding hoist gantry crane design theory 160t double girder truss gantry crane steel structure . Firstly, analysis of the current level of research and development trend of domestic crane , according to the shipyard 's design requirements, 160t double girder truss gantry crane steel structure design depth theoretical study proposes a more advanced design, and in ANSYS modeling, finite element analysis of strength and stiffness .

Double door frame is divided into rigid gantry legs hyperstatic

Railway yard gantry cranes ( hereinafter referred to as gantry cranes ) are mostly working in the open air , affected by natural wind . When the wind is greater than the steel crane predetermined value, the machine should be stopped . Or working in the state to stop the crane when subjected to strong winds , probably due to the wind and cause the brake device is not fortified gantry crane was blown away or tipping accidents , and even cause the plane crash . According to " crane safety supervision and inspection procedures " provides crane running on the track in the open-air work ( including rail gantry cranes ) , should be fortified wind devices. Two-stage wind brake effectively solve the wind braking railway gantry crane working state of hoist gantry crane emergency shelter under braking and static state . In the design and manufacture of gantry cranes , the correct choice of two levels of wind braking device is important . Hangzhou Railway Bureau tube gantry crane windproof two types of brake hydraulic brake wheel electric brakes two wind power hydraulic brake wheel brake device is a dual- power hydraulic brake system . In 36/16t gantry crane manufacturing , carts Traveling with double output shaft of the motor (YZR180L-8, 11kW), both sides were assembled brake wheel (φ300 and φ200), wind brake and brake work by the two were often closed electro-hydraulic brake blocks to complete.

Overhead crane automatic control jib crane of nonlinear underactuated

Under- drive system is the number of degrees of freedom to control the amount is less than the system of a class bridge gantry crane . By eliminating the parts of the drive system can reduce the complexity of the design , and can effectively reduce the cost or weight of the system itself , and thus the practical application of many of the systems are designed to be under- drive system , such as spacecraft , helicopter , underwater vehicle , satellite, flexible robots ; addition, when a drive failure of some all- drive system when it will become a less drive system. Although UNDERACTUATED bring great convenience features on the system design, manufacture, but it also makes the internal dynamics of the system is more complex, and usually accompanied by a non- complete constraint , so the system control has brought great challenges in recent years, the study of such systems control theory and gradually developed into a research steel crane. Overhead crane is a typical non-linear , strong coupling, due to the drive system , it has a load capacity, flexible operation , significant energy saving , etc., has been widely applied to many areas of industrial production , ports and transportation. In order to improve transport efficiency and safety performance of the cable car system , an urgent need to design a reasonable control strategy to achieve its automatic operation.

Typical gantry crane nonlinear systems

Overhead crane load capacity, flexible operation, in the industrial and transport fields have a wide range of applications . However, the overhead crane is a typical nonlinear , hoist gantry crane coupling, due to the drive system to achieve efficient control of its security is facing many difficulties , therefore , control of such systems has become a hot topic. Various crane control methods proposed in recent years , such as sliding mode control, adaptive control , although theoretically possible , but taking into account nonlinear interference and coupling phenomena that exist in the actual system , its usefulness remains to be tested. Experimental methods have become characteristic analysis system , controller design, stability verification steel crane technology tools. For these reasons , we designed and developed a three-dimensional overhead crane system is automatically controlled experiment , in order to verify the relevant control strategies implemented to provide a great convenience . The system can not only simulate the actual operation of the real good cable car system , and is very easy to test a variety of control algorithms and adjustments. In order to verify the reliability of the experimental system , the number of species on the overhead crane control method is applied to the experimental system , the experimental results are consistent with the theoretical analysis of the original documents , which illustrate the effectiveness of the system. Introduction bridge crane overhead crane system is a typical nonlinear systems owe drive .

Electric hoist gantry crane use common problems in the analysis

Electric hoist gantry crane is a kind of more sino hoist crane, the wharf, warehouse and construction sites and other open Spaces has been widely used. Electric hoist gantry crane hoisting device is all kinds of steel wire rope electric hoist, in order to realize the transportation of goods, or to turn the operation, the need to move up and down before and after the hoist gantry crane hook, moving back and forth around the car and mobile crane cart mobile forms such as combination. The work level applicable to the electric hoist gantry crane between A3 and A4, working temperature, about 25 degrees Celsius below zero to 40 degrees Celsius, the outdoor work, large, car and lifting structure must be set to cover. Main component of electric hoist gantry crane work for supporting institutions, electric hoist, steel door frame and electric control system, they are the core part of the electric hoist gantry crane work, also decided to the working performance of the electric hoist gantry crane is the most main factor. Using issues a, electric hoist gantry crane electric hoist gantry crane, a variety of models 10 tons of LDI type electric hoist gantry crane is widely used in railway construction departments, such as the following to the model electric hoist gantry crane as an example, points out problems need to be improved in use, for everybody to discuss. Electric hoist gantry crane beam and the opportunity to connect parts of the main girder

Chain electric hoist

Chain electric hoist made up for the shortcomings of wire rope electric hoist large bulky. Chain electric hoist motor, drive mechanism and the sprocket, and steel wire rope electric hoist's biggest difference change wire rope to the chain. Lifting weight average of 0.5 ~ 60 tons, lifting height is 3 ~ 120 meters. Chain electric hoist, keep hand chain hoist and convenient features, and improve the hand chain hoist steel crane operation, slow speed and so on, gathered his hand chain hoist and electric hoist, the advantages of using disc brake motor as power cycloid pin gear reducer reducer, chain electric hoist compact structure, small volume, light weight, high efficiency, easy operation, reliable braking, the characteristics of simple maintenance. Chain electric are mainly domestic platinum (Vanbon), TXK, ELK, WKTO, imported Japanese like CARDS, toyo, Japanese ghost number one, and sino hoist, animal husbandry, grace and so on Europe and the United States electric hoist and other several use is more, quality is good brand. Chain electric hoist capacity: 240 kg, 300 kg, 0.5 t, 1 t and 2 t, 3 t, 5 t, 10 t, t, 20 t, 30 t, 35 t, 50 t, t, 60 Shanghai wan platinum crane (Vanbon) have been able to achieve the maximum tonnage of 100 tons. Chain electric hoist chain electric hoist speed: double speed, single speed, frequency conversion start, double speed variable frequency start, domestic at present technology has been able to achieve a double speed variable frequency electric hoist manufacturing requirements. Chain electric hoist brake: pound of magnetic brake, conical rotor braking brakes, double brake (pounds magnetic brake + mechanical brake) chain electric hoist according to lifting methods are divided into: crane, crane lifting stage special upside down. Chain electric hoist characteristic: the performance of advanced structure, small volume, light weight, reliable performance, convenient operation, chain electric hoist applicability is wide and the lifting heavy objects, loading and unloading, maintenance equipment, lifting the goods is very convenient and chain electric hoist can be mounted to the impending h-beam, curve track, slewing crane rails and fixed hoisting hanging heavy objects. Chain electric hoist access power 110 v to 690 v (domestic current can reach), the standard generally is 380 v, 50 hz. Chain electric hoist control switch voltage is 36 v / 24 v (control switch if without built-in transformer into 36 v safety voltage will cause harm to the person so most of the link chain electric hoist control voltage is 24/36 v). Chain electric hoist standard configuration must contain a limit switch phase and phase sequence protector.