Hydraulic parts definition and classification
Hydraulic system is a set of using the PASCAL principle in hydrostatics (that is, the pressure added to any part of the closed liquid must be transferred from the liquid to all directions according to its original size), to the liquid as the working medium, and to the pressure can transfer power (or energy), conversion and control transmission system. Hydraulic system is the key to control the main engine to complete various actions. Its technical level and product performance directly affect the degree of automation and reliability of the machine and the performance and development of mechanical and electrical products and national defense products.
Hydraulic components refer to power components, executive components, control components, auxiliary components and other components used in the hydraulic system. There are many kinds of hydraulic parts, hydraulic pump, hydraulic motor (walking motor, rotary motor), hydraulic valve is an important part.
The industrial chain of China's hydraulic parts industry is divided into three links.
The upstream participants of the industrial chain are raw material suppliers, including steel, rod, seal, standard parts and adjusting parts.
The middle stream of the industrial chain is dominated by hydraulic parts manufacturers, including. The downstream application fields of the industrial chain are engineering machinery, aerospace, metallurgical machinery and other equipment manufacturing fields.
The upstream materials of China's hydraulic parts industry chain are mainly steel, steel rods, seals, standard parts and adjusting components, etc. The participants are raw material suppliers. The cost of hydraulic parts is composed of three elements: direct materials, manufacturing expenses and direct labor, among which direct materials account for the largest proportion. Data shows that in the cost structure, direct materials account for 63.5% of the total cost, manufacturing expenses account for 23.9%, and direct labor account for 12.6%.
The main participants in the middle stream of China's hydraulic parts industry chain are hydraulic parts enterprises. At present, China's middle and low-end hydraulic parts market is over-saturated, while the supply gap of high-end hydraulic parts is large. In order to promote domestic hydraulic products competitiveness. Through the promotion and application of industry-based achievements, we will build the competitiveness of the whole industrial chain and break the monopoly of foreign technologies and products. After the review of the Ministry of Industry and Information Technology, the following enterprises are recommended as the "one-stop" demonstration enterprises of construction machinery high pressure oil pump, multi-way valve and motor, which can enjoy the priority of national policy support.
