In recent years, with the rapid development of construction machinery, the inventory is also increasing rapidly. at present Manufacturer of cycloidal hydraulic motor The supporting market of large construction machinery is huge, and the domestic production rate is low. It mainly depends on imports and foreign enterprises to enter, so there is a huge space for import substitution. Product life is the main gap between domestic and foreign products, and the key to improve product life lies in surface treatment technology and material miniaturization. As users of hydraulic products, construction machinery accounts for 42.3% of the total sales of the entire industry, with a huge supporting market.
First, the walking system of construction machinery mainly adopts mechanical and hydraulic forms (except full hydraulic excavator). Now, it also appears in the walking driving device of construction machinery Hydraulic transmission And electric drive, which fully shows that the development of science and technology has greatly promoted this field.
The main advantage of hydraulic transmission over pure mechanical and hydraulic transmission is easy adjustment, High speed high torque hydraulic motor Flexible layout. The engine, driving wheel, working mechanism and other parts can be arranged in a reasonable position according to the shape of the construction machinery and the needs of the working environment. At any predetermined speed, the engine can exert greater traction, and the transmission system can still maintain higher efficiency at a larger output speed, and various optimized power transmission characteristics can be easily obtained to adapt to various situations.
With the combination of electronic technology and hydraulic technology, the hydraulic system can be easily adjusted and controlled. The introduction of microcomputer control and the application of various sensor elements have greatly expanded the working range of hydraulic elements. Various state parameters of construction vehicles are monitored through sensors, and control target commands are output through computer calculation, realizing automatic control of vehicles under all working conditions, Winch hydraulic motor Make the fuel economy, power and productivity of the vehicle reach. Therefore, hydraulic power transmission makes construction machinery easy to realize intellectualization, energy conservation and environmental protection, which has become the development direction of current and future construction machinery.
With the development of modern science and technology, electronic technology has great advantages in signal processing capability and speed, while hydraulic transmission and electric transmission also have advantages in the performance of their power components. So, Hydraulic plunger motor In addition to the ubiquitous "electronic nerve+hydraulic muscle" mode, there are also many successful examples in the composite transmission of power flow, such as: variable flow hydraulic oil source composed of variable frequency or DC speed regulating motor and high efficiency, low pulsation constant hydraulic pump, integrated electric pump hydraulic cylinder or low torque Hydraulic motor It is composed of electro-hydraulic actuator, industrial vehicle hybrid drive system, etc.
