DESCRIPTION
The solution performs a tightness test on the water circuit after the stator has been fitted, for the particular Jacket FRONT and Jacket REAR LONG & SHORT.
It provides nr. 1 “Stand Alone” helium testing plant with one test chamber to check the tightness of nr.2 die-casting jackets for electric motors. Quick change equipment <10 min.
The system includes a vacuum chamber, with automatic opening and closing, positioned on a frame with movable panels in electro-welded and painted steel.
Under the base of the vacuum chamber, the pumping unit is positioned, housed on a support frame inside a soundproof booth equipped with a ventilation system.
On the side of the pump cabin there are the cabinets containing the electrical panel, the analysis system and the pneumatic panel for the process gas distribution.
The man-machine interface consists of a 15" color touch-screen monitor and a push-button panel with controls and indicator lights for the operator at the side of each room.
The jacket to be tested is positioned by the operator or by the robot on the base of the vacuum chamber. The vacuum chamber closes automatically by descending from above and enclosing the piece under test inside it. The gaskets integrated in the vacuum chamber, seal the base of the jacket and separate the water circuit from the internal volume of the component.
While the internal volume is brought under vacuum, the water circuit is also evacuated and subsequently pressurized with the tracer gas (10% helium and air mixture) to perform the analysis of micro leaks.
Through the mass spectrometer connected inside the jacket, the system is able to detect the loss of the component under analysis, measuring it. Upon successful test, both circuits are discharged from the tracer gas.
Before the helium test, a search for large leaks is performed by measuring the pressure drop in the water circuit during the evacuation of the jacket's internal volume.
Test pressures, rejection thresholds and productivity that all our machines can reach may vary according to the technical specifications of the component and the production needs of the User.
