Standardization development of my country's hoisting machinery industry and performance requirements for couplings of wind turbine generator sets

(XNUMX) New thinking on the standardization development of my country's crane industry

1. Standardization development of my country's crane industry

At present, hoisting machinery standards and industry standards include "Crane Design Code" (GB/T3811-1983), "Lifting Machinery Regulations" (GB6067-1985, revised edition), etc., which have more than 200 items. The content of the standard mainly includes basics, products, hygiene, management and methods.On this basis, more than a hundred standards have been adopted.According to the existing and hoisting machinery standards and industry standards, combining with the actual development of my country's hoisting machinery industry, referring to the developed experience, and actively participating in standardization activities, establishing a sound and perfect hoisting machinery standard system to help my country's machinery The heavy industry is gradually moving towards the level.

2. The development trend of my country's crane industry

Tonnage polarization and intelligence are the development trend of my country's crane industry in the future.The "polarization" development of cranes refers to "large-scale" and "miniature" respectively.my country's crane industry has made great breakthroughs in the development of equipment "large-scale", and "miniature" will become a brand new development opportunity.Increasing investment, multi-functional "mini" cranes are widely used in the production and manufacturing of various industries, which undoubtedly expands a large market space for my country's lifting machinery industry.

The intelligent development of hoisting machinery has increased its skills so that it can be suitable for work in various types of space environments to expand the application fields of cranes.The introduced technology is considered from the perspective of humanization, further the functions of cranes, and product innovations are tried, which brings brand new opportunities for the development of my country's lifting machinery industry.

In addition, the standardized development of the crane industry is aimed at sustainable development in order to seek high economic benefits.On the basis of the traditional profit model, the e-commerce platform is used to help crane machinery manufacturers reduce costs, while obtaining high economic benefits, realizing resource optimization, and tapping new market potential.Judging from the current practice, its effect is considerable, which has opened up a new path for the standardization development of my country's lifting machinery industry.

As one of the important industries of the national economy, my country's lifting machinery industry is facing huge opportunities and challenges. This requires a clear understanding of the current development situation, understanding of its own strengths and weaknesses, and timely improvements and upgrades.Under the comprehensive standard system of lifting machinery, the standardized development of the lifting machinery industry has improved the degree of production of lifting machinery in my country, and expanded its broad development space. It is positive for the development of the lifting machinery industry and even the national economy. Meaning.

The driving system of the hoisting operation includes the mechanism system and the component system, which are used for the lifting operations.According to the characteristics of the general hoisting mechanism, it can be divided into the hoisting mechanism, the trolley operating mechanism, the large cart operating mechanism and the pitching mechanism. The hydraulic system (including the telescopic rotation of the spreader, the cabin protection, etc.) and the rope supporting mechanism are also the parts with more failures. , The configuration status of the emergency organization is the emergency operation of the corresponding organization.The main components of each operating mechanism are mainly composed of brakes, reducers (gears), couplings, bearings, pulleys, etc. In addition, the lifting, pitching and traction trolley operating mechanisms are also composed of drums, wire ropes, etc., and large and small vehicles run The mechanism also consists of wheels.

(XNUMX) Performance requirements for couplings of wind turbines

(XNUMX) Working environment

The environment of wind turbines in actual work is relatively harsh. According to the distribution of wind energy resources in my country, the areas where wind energy is already available and the areas where wind energy is about to be are located in coastal areas. XNUMX. However, salt fog often appears in coastal areas and the surrounding environment Both are relatively humid. XNUMX. Under this condition, the related parts of the fan are prone to rust and aging. XNUMX. In some mountainous areas, it is easy to produce strong airflow due to unstable settlement and rising airflow.

(XNUMX) Load category

The load category is different according to the working load impact, vibration, braking and other reasons of the unit.Because different couplings have different load-bearing capabilities, the load of the coupling on the wind turbine generator is mainly affected by the impeller, gearbox and generator.If the coupling is affected by its own center of mass and inertia, the unbalanced state of centrifugal inertia will also occur during operation.These factors not only affect the normal operation of the drum gear coupling, but also affect the selection index of the coupling.

(XNUMX) Transmission accuracy

The coupling of the wind generator is mainly to transmit power, but the transmission accuracy must be relatively high.During this period, not only must avoid non-metal elastic elements, but also avoid gaps between movable elements.Under this condition, the high-speed rotation process is prevented, and the coupling is prevented from being damaged.

(XNUMX) Relative displacement of the connected two shafts

The two shafts of the coupling are affected by related factors such as manufacturing errors, installation errors, and deformation, and will cause displacement, especially the form of movement between components.The generator in the wind may exist for a long time during the paired operation, which is likely to cause the elastic support to continue to fail, thereby causing vibration under wind speed conditions.The manifestation of this phenomenon is different from the influence of generators and gearboxes. The displacement phenomenon produced on the axis cannot be controlled. To a certain extent, the displacement between the two shafts cannot be avoided. Under different operating conditions, the shaft Related factors such as the displacement of the train will also be different.

According to the above research and discussion of related phenomena, wind turbines are easy to change their working characteristics under the operating environment, so some conditions must be considered during the selection of the coupling.For example, the selection of transmission accuracy is relatively high.Not only should it be selected within a reasonable temperature range, but also the one with the ability and oil resistance to prevent slipping.

According to the understanding of the coupling-related knowledge, during the selection of the coupling type of the wind power unit, comprehensive consideration of its various performance and price is carried out. Under the situation of failure protection, the maintenance can be reduced without the use of a clutch. The difficulty and cost.