What is the compressed air pressure supply standard in the motor workshop

The compressed air pressure supply standard in the motor workshop needs to be determined based on factors such as equipment requirements, process characteristics and system efficiency. The following are specific specifications and practical suggestions:

1. Core pressure supply standards

1. Pressure requirements for conventional equipment
   • Pneumatic tools and cleaning equipment: Rated pressure 0.5~0.7 MPa, suitable for pneumatic wrenches, purging devices, etc.
   • Universal automation equipment: Pressure range 0.6~0.8 MPa, meet most pneumatic drive needs.
2. Special process high pressure requirements
   • Pneumatic power distribution system: Operating pressure of air circuit breakers and isolating switches 2~2.5 MPa。
   • Precision stamping equipment: Some highly rigid molds require instantaneous pressure ≥1.0 MPa。

2. Key factors affecting supply pressure

1. Equipment power and process requirements
   • The higher the motor power, the higher the air pressure required. For example, a 5kW air motor requires 0.6~0.8 MPa, and 10kW equipment may require 0.8~1.0 MPa。
   • Precision assembly lines require pressure fluctuations ≤±0.05 MPa to avoid damage to components.
2. Influence of environmental temperature and humidity
   • High temperature environment (>35℃) requires increased pressure supply 0.1~0.2 MPa, compensate for gas expansion losses.
   • In high-humidity environments, drying treatment needs to be strengthened to prevent moisture from causing false alarms of pressure sensors.
3. System design and layout
   • Pipeline pressure drop: Increase pressure drop every 10 meters of pipeline 0.02~0.05 MPaFor long-distance air supply, the output pressure of the air compressor needs to be appropriately increased.
   • Leakage loss: When the system leakage rate is greater than 5%, priority should be given to repair, rather than simply increasing the pressure supply.

3. Pressure monitoring and optimization

1. dynamic adjustment strategy
   • Pressure sensor +PID controller is used to achieve closed-loop adjustment to ensure stable end pressure.
   • During peak air consumption (such as centralized equipment startup), the output pressure of the air compressor needs to be increased 10%~15%。
2. Energy saving optimization plan
   • Configuration of variable frequency air compressor: Adjust the output power according to real-time air consumption, saving energy by about 20%~35%.
   • Gas tank buffer: Configure a gas tank with a total volume of>20% of peak gas consumption to reduce pressure fluctuations.

4. Typical failures and responses

• insufficient pressure: Check pipeline leaks (focus on testing joints and valves) and clean blocked filters.
• pressure is too high: Calibrate the pressure sensor and check whether the unloading valve is stuck.
• Oil content exceeds standard: Upgrade multi-stage oil filters or switch to oilless air compressors.

5. Industry practice cases

A motor factory has improved the energy efficiency of its compressed air system by 40% through the following measures:

1. Adjust fixed supply pressure to 0.6~0.8 MPa Gas supply in sections to match the needs of different equipment.
2. Install an intelligent monitoring system to detect pressure, dew point and oil content in real time.
3. Using heat recovery technology and using air compressor waste heat to preheat the workshop, the annual energy saving cost is about 800,000 yuan.

conclusion: The compressed air pressure supply standard in the motor workshop must follow the principles of “demand-oriented, dynamic adjustment, and system optimization”, and combine the equipment manual parameters and on-site measured data to formulate a personalized pressure supply plan to ensure dual optimization of efficiency and cost.