The utility model discloses a water pump
air tightness test bench, which relates to the technical field of test benches and comprises an
air tightness machine bench, a control top box and a two-stage three-way
electromagnetic valve, a
mechanical pressure gauge is embedded in the outer wall of the control top box, a plurality of groups of control buttons are arranged on the outer wall of the control top box, and a U-shaped
test fixture is arranged on the outer wall of a ventilation air
pipe. A first-level adjusting valve is installed on the inner wall of the airtight
machine table, a second-level adjusting valve is installed on the inner wall of the airtight
machine table, and a one-in and one-out
electromagnetic valve is installed on the inner wall of the airtight machine table. According to the utility model, the
air tightness inspection mechanism is installed, the U-shaped
test fixture is connected with the water pump, the external ventilation air
pipe is connected with the
test bench, a first-stage regulating valve and a second-stage regulating valve of the
test bench are adjusted to specified numerical values, a control button switch of the test bench is pressed down, the shaft of the water pump rotates 3-5 circles within 15 seconds, timing is stopped when the time reaches 15 seconds, and the air tightness of the water pump is detected. And when the
mechanical pressure gauge of the test bench is still stabilized at 0.045 Mpa and the pointer value of the
mechanical pressure gauge is not changed, the airtight test of the water pump is qualified.