Development Trend of Hydraulic Cylinder Combined with Hydraulic Transmission Technology

Hydraulic cylinder and hydraulic drive technology combined to make the traditional hydraulic transmission and control skills to increase the vitality and expand the use of the field. The completion of mechanical and electrical integration can improve the reliability of the work to complete the hydraulic cylinder flexible, intelligent, low efficiency hydraulic system changes, oil leakage, poor maintenance and other shortcomings, give full play to hydraulic transmission, consistency small, echoes and other strengths, its The main intention is as follows:

    Electro-hydraulic servo share of the use of skills will continue to expand. Hydraulic system will be the previous electrical and hydraulic on-oE system and the open-loop share control system to the closed-loop share servo system, used to carry out the above, pressure, flow, azimuth, temperature, speed, acceleration sensors should be standardized. The computer interface should also be unified and compatible.

     To carry out and computer direct interface power consumption for the following 5mA solenoid valve, and for the pulse width modulation system of high-frequency solenoid valve (less than 3mS) and so on.

Hydraulic cylinder is a hydraulic performance element that converts hydraulic energy into mechanical energy. Hydraulic cylinders convert hydraulic energy into mechanical energy. Hydraulic cylinders are hydraulic actuators that convert hydraulic energy into mechanical energy and do linear reciprocating motion (or rocking motion). Its structure is simple, reliable operation. Use it to achieve reciprocating motion, can be exempted from deceleration equipment, and no transmission gap, smooth movement, so in a variety of mechanical hydraulic system is widely used. Hydraulic cylinder output pressure and piston useful area and the pressure difference is proportional to the two ends; hydraulic cylinder basically by the cylinder and cylinder head, piston and piston rod, sealing equipment, buffer equipment and exhaust equipment.

80 years, under the guidance of the principle of national reform and opening up, with the development of machinery industry, the basic pieces lag behind the host of the contradiction has become increasingly prominent, and caused the attention of the relevant departments. Since then entered a period of rapid development, has introduced more than 60 foreign advanced technology, of which more than 40 hydraulic, pneumatic 7, the digestion and absorption and technological transformation, are now mass production and become the industry's leading products.

In recent years, the industry has increased the intensity of technological transformation, 1991 to 1998 national, local and corporate self-financing total investment of about 20 billion yuan, of which more than 1.6 billion hydraulic. After technological transformation and technical research, a number of major enterprises to further improve the technological level, technology and equipment have been greatly improved, to form a high starting point, specialization, mass production laid a good foundation.

     In recent years, under the guidance of the principle of common development of various forms of ownership of the country, small and medium-sized enterprises with different ownerships have risen rapidly, showing great vitality. With the further opening of the country, the rapid development of foreign-funded enterprises, to improve the level of industry and expand exports play an important role.

    At present, China has established joint ventures with foreign manufacturers, such as plunger pump / motor, steering gear, hydraulic control valve, hydraulic system, hydrostatic transmission, hydraulic parts casting, pneumatic control valve and so on, Cylinder, air handling triple pieces, mechanical seals, rubber seals and other products more than 100 manufacturers, the introduction of foreign capital more than 300 million US dollars.