Hydraulic system is constantly improved and raised

The working pressure of hydraulic system of large and medium-sized shovel machine has a tendency to improve. The working system pressure is increased from 14 to 18MPa, and the steering system pressure is increased from 10 to 12MP to 14 to 16MPa, such as CTX4B and CTXSN shovel with working pressure of 18MPa and steering pressure of 14Mra, such as ETS 3.5 shovel with working pressure of 14MPa and steering pressure of 16MPa, such as 

Hydraulic system power components are still dominated by high-pressure gear pump, but some large and medium-sized shovel brake / steering system using piston type pressure compensation variable pump, in order to make full use of engine power, and reduce the system heat. Such as said C series (including Eimoc928 type) forklift on the use of this system.

(3) large and medium-sized shovel work device system almost all use pilot control, some steering systems also use pilot control, in order to reduce the driver's labor intensity, simplify the piping arrangement.

(4) The hydraulic circuit is widely used in the integrated block to reduce leakage, simplify piping, facilitate maintenance, and maximize energy efficiency.

(5) the use of world-renowned manufacturers of high-quality hydraulic components to improve the reliability of the hydraulic system, such as the use of Co~criail gear pump, vick-esr company's piston variable pump, Hyderoc company, Da Journal than the s. company's multiway valve, Reoht control valve, EM several companies of the cylinder, F pension reformer company's seals and accumulators, Mioc The company's brake valve, etc.

(6) improve the cleanliness and filtration accuracy of hydraulic oil. Such as EM's centralized filtration tank (HM), large filtration capacity, high filtration accuracy, reduce the back pressure loss, reduce the oil temperature, improve the life of the filter element, to avoid the cavitation phenomenon of the oil pump and foreign pollution.

Focus on environmental protection and safety

Due to the harsh conditions and environment of underground operation, modern shovelers pay special attention to the ergonomic design. To make the operating system adapt to the physiological and psychological characteristics of human beings, to meet the requirements of human body functions, to achieve human-computer coordination, rapid and accurate operation and ideal visual effects, in order to form a comfortable and safe working environment, reduce operational fatigue, improve work efficiency and maintain personal health. To this end, the modern shovel machine to take the following measures:

(1) the hydraulic system generally adopts pilot control, so that the operation is light;

(2) the use of electric / hydraulic gearshift or electronic automatic gearshift to reduce driver operating fatigue;

(3) The cab is more spacious, the operation handle, buttons and instrument panel are arranged in accordance with ergonomic requirements, the instrument display and sound and light alarm are perfect and complete, and the safety roof adopts the falling stone impact insurance structure;

(4)The cab of large scraper is designed according to ergonomics, with the functions of sealing, dustproof, sound insulation, vibration damping, anti-tip, anti-stone impact and air conditioning, and the driver's seat is comfortable and adjustable, which makes it safer and more efficient to use.