Performance comparison between piston compressor and screw compressor
The noise of piston machine is big, and the maintenance is inconvenient. Most piston machines often have problems in the use process, so it brings great inconvenience to users. At the same time, it can reduce production costs, increase economic benefits, facilitate equipment management, beautify the company's environment and enhance the company's image. Building an advanced and economical air compressor station by using high efficiency and high reliability screw compressor to eliminate the existing piston air compressor is an inevitable trend for the factory to expand in the future.
The basic criteria for selecting air compressor are economy, reliability and safety (two certification system).
The old piston air compressor and screw air compressor have poor economy and reliability. The piston type air compressor is a kind of machine that the majority of users are very familiar with. It is a kind of product recognized by everyone in the very early stage. But with the continuous innovation of technology and the emergence of new air compressor, the disadvantages of piston type air compressor are more and more prominent. Compared with screw air compressor:
A. piston air compressor has many vulnerable parts such as air valve, piston, piston ring, connecting rod bush, etc. the reliability of continuous operation is poor. Screw air compressor, on the one hand, will affect production, on the other hand, will increase the cost of maintenance and management.
B. compared with screw air compressor, the efficiency of piston air compressor is low, especially for long-term continuous operation, its economy is worse. Because the compression cavity formed by piston air compressor is a lot of vulnerable parts, the wear and damage of these vulnerable parts will cause greater leakage during gas compression, and eventually lead to the reduction of compressor efficiency. Because there are no wearing parts that affect the efficiency of the machine in the screw compressor, a pair of rotors that are compressed will not wear because of the characteristics of their own structure. Therefore, the economy of long-term continuous operation is much better than that of piston air compressor.
C. the piston type air compressor is a reciprocating motion mechanism, which has an irreducible inertia force. Therefore, the piston type air compressor with high vibration and noise during operation needs special fixed foundation during installation. Screw air compressor is a rotary motion mechanism with good balance, small vibration and low noise. It does not need to install the foundation, but also avoids the pollution of the working environment.
D. the piston type air compressor is a reciprocating intermittent air supply, with large air pulsation during operation, high rotation speed of screw compressor, stable gas transmission and no air pulsation, which can meet the needs of users with high gas demand.
E. the piston air compressor basically has no automatic control system, and the screw compressor has a perfect automatic control and protection system, which belongs to the mechanical and electrical integration product, which facilitates the maintenance and management of the equipment and reduces the energy consumption to the maximum extent.
F. screw air compressor is a highly centralized product with an overall structure, covering a small area. Without the complicated pipeline system of piston air compressor, it can beautify the production environment of the company.
The models used are too many and too scattered, which is not convenient for equipment management, but also increases the number of vulnerable parts, which is bound to increase the cost of normal operation. At the same time, the scattered layout makes the production environment more polluted.
Poor air quality and high fuel consumption. There is wear of piston ring in piston air compressor. Although there is oil scraper ring on the running piston, a lot of lubricating oil will flow into the cylinder and be discharged together with the gas. In this way, on the one hand, the quality of the gas will be reduced, on the other hand, the oil consumption will be increased. The inevitable leakage of lubricating oil will also increase the oil consumption and pollute the environment. Screw air compressor has efficient oil-gas separation system and filtration equipment, no wearing parts, high gas quality and low oil consumption. Based on the above situation, the relevant departments of the state issued a document in 2000, requiring domestic enterprises to phase out the piston type air compressor with high operating cost and low reliability and replace it with high-efficiency screw compressor in the use of medium and low-pressure air compressor, which has become a reality in developed countries.
To sum up, in order to reduce production costs, increase economic benefits, facilitate equipment management, beautify the company's environment and enhance the company's image, it is an inevitable trend for your company to develop an advanced and economical air compressor station by using high efficiency and high reliability screw compressor to eliminate existing piston air compressors.