spacecraft parts

WaFu Brothers plays a key role in the field of air tightness testing in the aerospace industry, providing high-precision testing equipment. Its technology is used in spacecraft cabin sealing testing to ensure that the cabin is leak-free; in fuel system testing to ensure the safety of fuel tanks and pipelines; it also supports sealing testing of life support systems, propulsion systems and thermal control systems to ensure the safety of astronauts and stable operation of equipment. WaFu Brothers provides reliable support for aerospace missions with advanced technology and has become an important partner in the industry.

1. Working principle of air tightness detector

1. Pressure control and monitoring

By accurately controlling the internal pressure of the cabin, the space working environment of the spacecraft is simulated. Monitor the pressure difference inside and outside the cabin in real time to ensure that the pressure change range is ≤0.5%FS.

2. Leak detection technology
  • Adopts 10^-9 mbar·l/s sensitivity sensor
  • Helium mass spectrometry detection method: fill with 99.999% high-purity helium
  • Supports pressure difference method/pressure decay method dual-mode detection
3. Data management system

Equipped with HX-2000 series data acquisition module, including:

  1. Real-time recording of pressure curve
  2. Automatic calculation of leak rate (unit: Pa·m³/s)
  3. Automatic generation of test reports (PDF/Excel format)

2. Aerospace cabin detection plan

1. Early preparation
  • Surface treatment: Cleanliness requirements of Ra≤3.2μm
  • Equipment calibration: performed according to JJG 1107-2015 standard
2. Testing process

Typical test parameters:

Project Standard value Allowable deviation
Test pressure 1.5 times working pressure ±0.5%FS
Stabilization time ≥30min +5/-0min
Safety regulations
  • Operating pressure ≤ equipment rated pressure 150%
  • Helium concentration monitoring (< 1% volume fraction)
  • Explosion-proof certification: complies with ATEX 2014/34/EU standard

1. Fuel Tank Sealing Inspection Solution

1. Inspection Methods
  • Helium Leak Detection: Utilize a helium mass spectrometer to detect helium leaks with precision up to 10⁻⁶ mbar·l/s
  • Microflow Detection Method: Employ a flow sensor with ±0.1mL/min resolution
2. Inspection Process
Preparation:
  • Surface cleanliness requirement: Ra≤6.3μm
  • Visual inspection of the integrity of tank body welds
Pressurization:
Test Medium Helium-nitrogen mixture (He 10% + N₂ 90%)
Test Pressure 1.2 times working pressure (Max 8bar)
Rate of Pressure Increase ≤0.5bar/s
Data Collection:
  1. Pressure curve sampling rate: 10Hz
  2. Leak rate calculation: ΔP/Δt
  3. Temperature compensation: PT100 sensor with ±0.1℃ precision
3. Operating Guidelines
  • Explosion-proof requirements: Ex ib IIB T4 Gb grade
  • Helium concentration monitoring: ≤1% VOL (explosive lower limit 25%)
  • Emergency relief valve setting: 110% of test pressure

1. Air Tightness Testing Methods

1. Helium Leak Detection

Utilize a helium mass spectrometer to detect helium leaks, suitable for high-precision leak detection.

2. Microflow Leak Detection

Detect small leak points by measuring changes in small gas flow.

2. Testing Procedure

1. Preparation
  • Clean the part to ensure there are no residues inside.
  • Check the surface of the part for cracks or damage.
2. Inflation and Pressurization

Connect the part to the testing equipment, slowly inflate it with the test gas (such as helium), and gradually pressurize it to the predetermined value.

3. Leak Detection

During the pressurization process, use high-sensitivity sensors to monitor the surface of the part and detect any leak points.

4. Data Recording and Analysis

Record real-time parameters such as pressure, temperature, and leak rate during the testing process. Analyze the data to evaluate the air tightness of the part.

3. Safety Precautions

  • Safety: When performing air tightness testing, strictly follow the operating procedures to ensure the safety of personnel and equipment.
  • Environmental Control: Factors such as temperature and humidity in the testing environment may affect the test results, so the environmental conditions should be kept stable.
  • Equipment Maintenance: Regularly maintain and calibrate the testing equipment to ensure its stable operation over the long term.