Hydraulic mechanical transmission control system is a fluid transmission and control technology effectively combined with advanced technology, which mainly includes power elements, hydraulic components, control elements and hydraulic auxiliary components. The system uses liquid as an effective medium for energy transmission as well as control, and is controlled by the component circuit for energy transfer. At present, the system has been widely used in many fields, especially in the field of mechanical design and manufacturing has been inseparable from the extensive use of hydraulic mechanical transmission control system, which also contributed to the continuous development of the field of mechanical design and manufacturing, so the study of hydraulic mechanical transmission control system in the practical application of mechanical design and manufacturing is significant.
The advantages and disadvantages of hydraulic mechanical transmission control system
1. The advantages of hydraulic mechanical transmission control system
The advantages of the hydraulic mechanical transmission control system can be summarized as the following four points.
First is the high power, hydraulic mechanical transmission control system is mainly composed of power components, hydraulic components, control components and hydraulic auxiliary components. Compared with the traditional hydraulic transmission and mechanical transmission, the hydraulic mechanical transmission power of this system is relatively large, while the introduction of microelectronics technology in this system, making the system’s high degree of functional integration, can achieve effective power control in a smaller space.
The second is miniaturization, which is due to the highly integrated characteristics of the components of the hydraulic mechanical drive control system, making the system miniaturized and lightweight development. At the same time, due to the better interoperability of the internal components of the system, also makes the system can be operated to a high degree, can be effective for different work requirements of the hydraulic mechanical transmission. Next is good stability. The actual application of this hydraulic mechanical transmission control system can be mechanical work process heat generated through the hydraulic oil flow transfer, can effectively reduce the system temperature, to avoid local overheating of the system, and then ensure the stability of the use of machinery.
At the same time due to the above reasons, the system can also be used for low-speed heavy load conditions of the hydraulic machinery transmission. Finally, the automatic shift function, in order to make the operator according to the relevant requirements of the machinery for easy and flexible operation, improve the efficiency of machinery, can use this hydraulic mechanical transmission system. The system has automatic shift function, according to the actual working conditions and mechanical operating requirements of the different effective gear automatic adjustment, convenient for the operator to work device operation, do not consider the problem of gear operation, can reduce the probability of operational errors in mechanical work, and then achieve the overall mechanical efficiency.
2. Disadvantages of hydraulic mechanical transmission control system
The disadvantages of the hydraulic mechanical transmission control system mainly include the following five aspects.
First is the hydraulic system leakage problem, which is one of the important disadvantages of the hydraulic machinery transmission control system, which seriously affects the stability and correctness of the entire transmission control system. This hydraulic system oil leakage problem makes the hydraulic mechanical transmission transmission ratio volatility, can not reach the relevant hydraulic mechanical transmission control requirements, seriously affect the stable operation of the hydraulic transmission system and transmission control correctness, the shortcomings will also cause adverse effects on the entire mechanical working condition, making the mechanical efficiency is low, at the same time due to this reason, the system is not suitable for long distance transmission.
The second is the temperature change problem, usually the temperature change in the system will directly affect the system’s motion characteristics. This hydraulic machinery motion control system has high requirements for temperature, when the system temperature increases, the viscosity of the fluid in the system changes, making the system’s motion characteristics also change, which affects the stability of mechanical work. Therefore, the system should focus on monitoring temperature changes during operation, to prevent mechanical operation due to temperature changes caused by deviation problems.
Again is the difficulty of fault checking and troubleshooting, hydraulic machinery drive control system fault checking and troubleshooting workload and difficulty. The normal operation of the system, hydraulic components running metal powder generated by the problem of mechanical equipment failure is easy to cause, and the system outside the large amount of dust attached to the machine and equipment, but also on the operational stability of the system will cause serious impact. For the system, these metal powder and dust is usually unavoidable, and its also increases the fault inspection and troubleshooting workload and difficulty.
Finally, the cleaning work, the actual operation, hydraulic machinery motion control system is easy due to some external factors interference, so that the stability of the system and operating results are not guaranteed, so the need for a comprehensive cleaning work before the actual operation of the system, as far as possible to avoid the interference of external factors on the system.
Hydraulic machinery drive control system in the specific application of mechanical design and manufacturing
1. Hydraulic mechanical transmission control system application characteristics
According to the highly integrated characteristics of the hydraulic mechanical transmission control system, it can effectively meet the strict requirements of different industries on the scale, power, accuracy and efficiency of mechanical design and manufacturing. The characteristics of miniaturization and light weight also make the system can be applied in different construction environments and construction conditions. In the field of machinery design and manufacturing, the hydraulic mechanical motion control system can effectively make up for the shortcomings of the traditional transmission system according to its own characteristics, while the mass application of this system can reduce the difficulty of machinery design and manufacturing, improve the precision of machinery manufacturing and shorten the manufacturing cycle. The hydraulic mechanical drive control system applies automation control technology to the field of mechanical design and manufacturing, which can accelerate the automation process of mechanical design and manufacturing, while automation is also an important direction for future research and development of mechanical design and manufacturing [2]. This application can effectively control product quality as well as improve production efficiency and actually meet the industry needs of mechanical products. At present, hydraulic mechanical transmission control systems are also widely used in many industries such as national defense, agriculture, metallurgy and coal mining.
2.Hydraulic transmission stepless transmission
Mechanical design and manufacturing, can be used in the hydraulic mechanical transmission control system to achieve effective control of its speed, that is, stepless speed change technology. In general, the normal operation of the hydraulic system requires the use of variable pumps as well as quantitative motors. When the system works, the power is separated by the engine, and part of it is transmitted to the planetary frame along the clutch, while the other part reaches the sun wheel through the hydraulic system, and these two parts of the power are effectively synthesized through the differential wheel system part, and then output through the gear ring of the differential wheel system to the outside. Usually, before the actual mechanical work, it is necessary to disconnect clutch C1 and close C2 at the same time, so that all the power of the engine enters the hydraulic system, thus ensuring the normal start of the machinery.
When the machinery actually works, clutch C1 is closed and C2 is disconnected, and the control system is used to reduce the speed of the hydraulic motor to 0. At this time, all the power of the engine is effectively transmitted through the mechanical system, which can improve the efficiency of power transmission during mechanical work, and make reasonable adjustments to the direction of rotation of the system motor, so as to adjust the output speed of mechanical work and ensure the normal operation of the system at different speeds. In turn, this mechanical system to achieve the stepless speed change.
At present, this hydraulic transmission stepless transmission has been practically applied in the loader and bulldozer, the device runs well and can be used in large quantities in the field of construction machinery.
3.Pure water hydraulic mechanical transmission control system
At present, in the field of machinery manufacturing, pure water hydraulic mechanical transmission control system is one of the important development direction of hydraulic transmission technology, the system is a combination of technological progress and environmental protection products, its is a new type of hydraulic transmission technology, its use of pure water as an effective medium for energy transmission as well as control, which is the biggest feature of the system.
Compared with hydraulic oil, pure water is cheap, simple to prepare as well as widely available, which can effectively reduce the operating costs of enterprises and thus enhance their economic benefits. Metallurgy, coal mines and other special industries, the hydraulic machinery drive control system requirements are high, the conventional hydraulic oil leakage is easy to cause fire, which seriously threatens the safety of business operations, and pure water has good flame retardant, can prevent the hydraulic machinery drive control system hydraulic oil leakage caused by safety problems.
Compared with the mineral-based hydraulic oil, pure water has a lower compression coefficient, making the compression loss of pure water relatively small. At the same time the conventional hydraulic mechanical transmission control system hydraulic oil leakage problem, will cause serious pollution of water bodies and soil, which also restricts the green and sustainable development of metallurgy, coal and other industries, and the use of pure water hydraulic mechanical transmission control system, which can cause a lower degree of environmental pollution.
At present, the pure water hydraulic mechanical transmission control system has been in some industries have been practical applications, the system of small pollution, low cost and other characteristics in line with the relevant industries in China’s environmental protection requirements, it is also a conventional hydraulic mechanical transmission control system instead of technology, so the pure water hydraulic mechanical transmission control system as a hot research object in the field of machinery manufacturing, the system of research and development as well as the practical application of broad prospects.
Hydraulic mechanical transmission control system problems in the practical application
Hydraulic mechanical drive control system using the increasing maturity of the technology, but also to promote the system in many areas have been widely used, especially in the field of mechanical design and manufacturing, which can not only reduce the manual labor intensity, but also effectively control the corresponding business operating costs. But the actual application of the current system there are still some problems, including the more prominent problem is the current hydraulic machinery transmission control system in China using a variety of components basically need to be imported from abroad, such as power components, hydraulic components, control components and hydraulic auxiliary components.
Compared with the developed international, China’s manufacturing components in the strength and precision are relatively backward, and the normal operation of the system, the system needs the mutual collaboration of these components to complete the work, so the quality of these components seriously affects the perfection and functionality of the entire hydraulic machinery transmission control system. If the quality of these components does not meet the relevant requirements, may cause the system to operate unstable and low functionality.
Therefore, in order to realize the large-scale application of hydraulic machinery transmission control system in various fields, it is necessary to realize the localization of various components of hydraulic machinery transmission control system, and through the introduction of foreign technology and independent innovation to ensure that the strength and precision of the relevant components meet the system requirements, effectively enhance the functionality and adaptability of the relevant components, optimize and improve the hydraulic machinery motion control technology, realize the hydraulic machinery motion control system stability of operation, so as to drive the in-depth development of the field of mechanical design and manufacturing and related fields.
Conclusion
Through this paper on the advantages and disadvantages of the hydraulic machinery drive control system, as well as the practical application of the system and the analysis of the existing problems. Hydraulic mechanical transmission control system as a new hydraulic transmission technology, which can effectively improve the efficiency of machinery and energy utilization, to ensure the quality of mechanical work as well as to achieve effective improvement of enterprise economic benefits. At present, the system has been widely used in many fields, but there are still some problems in the application process, with the continuous improvement of hydraulic transmission technology and the timely handling of these problems, hydraulic mechanical transmission control system application prospects will be more broad.