What are the characteristics of mechanical system design? What are the contents of the overall design of mechanical system?

Mechanical system design is a technical practice activity to conceive and plan a mechanical system and turn the idea into reality.

Types of mechanical system design:

Although there are many kinds of mechanical systems and their structures are ever-changing, from the design point of view, they can generally be divided into development design, variation design and reverse design.

1, development and design

Aiming at the new task, a new scheme is proposed to complete the whole process of product planning, conceptual design and configuration design.

2. Variation design

On the basis of existing products, aiming at the original shortcomings or new work requirements, some changes are made in the working principle, functional structure, type and size of the actuator, and new products are designed to meet the market demand and enhance market competitiveness. This design can also include developing a series of variant products with different parameters, different sizes or different functions and performances while keeping the working principle unchanged on the basis of the basic products. For example, air conditioning system products, air conditioning series with different powers and air conditioning series with different performances (frequency conversion, purification, etc.). ) all belong to mutation design.

3. Reverse design

In view of the existing advanced products or designs, we should conduct in-depth analysis and research, explore and master their key technologies, and develop new products of the same type on the basis of digestion and absorption, but we can avoid their patents.

Characteristics of mechanical system design:

The design of mechanical system must consider the operation of the whole system, not just the working state and performance of each component. The traditional design method pays attention to the design of internal system and focuses on improving the characteristics of parts. As for the interaction and influence among parts, external environment and internal system, less consideration is given. Although enough attention should be paid to the design of parts, all the best parts may not form a good system, and their technology and economy may not be well unified. On the premise of ensuring the best working state and performance of the whole system, the basic requirements of each component and its coordination and unity should be determined.

At the same time, on the basis of investigation and study, find out the role and influence of external environment on mechanical system, such as market demand (including function, price, sales volume, size, quality, construction period, appearance, etc. ) and constraints (including capital, materials, equipment, technology, personnel training, information, use environment, logistics supply, maintenance, after-sales service, foundation and foundation, laws and policies, etc. All these have a direct impact on the internal system design, not only affecting the overall scheme, economy, reliability and service life of the mechanical system, but also affecting the performance parameters, structure and technical requirements of specific parts, and may even lead to design failure.

In addition, we can't ignore the function and influence of mechanical system on the external environment, including the influence of products on the market situation and competitors after they are put into the market, and the influence on the operating environment, operators and others around them during the operation.

The combination of internal system design and external system design is the characteristic of system design, which can make the design as thorough and reasonable as possible, avoid unnecessary rework and waste, and get as much benefit as possible with the least investment. With the increase of system complexity, its technical, economic and social effects are becoming more and more obvious.