Water injection mode of hub air tightness testing machine

Abstract

A water injection mode of a hub air tightness testing machine comprises an air storage tank (1), a water storage tank (2), an air inflation water pressing system (3), a water returning air deflating system (4), a testing water groove (5), a liquid lifting pipe (6), and a water level detecting system (7). The water injection mode is characterized in that a large amount of high pressure gas is stored in the air storage tank (1), when a machine tool sends a signal to the air inflation water pressing system (3), a solenoid valve in the system is opened, and the high pressure gas in the air storage tank (1) is filled to the water storage tank (2); when a water level is lowered down to the preset water level of the water level detecting system, the solenoid valve of the water returning air deflating system is closed, and then a working cycle is finished. According to the water injection mode of the hub air tightness testing machine, water is injected through the air pressure, a caisson is not needed, the size of the water storage tank is reduced, materials consumed by the machine tool are reduced, and cost is reduced. More machine tools can be placed in a limited environment, and productivity is improved.

Description

technical field [0001] The invention belongs to airtightness testing equipment for automobile and motorcycle hubs, and can be widely used in horizontal and vertical airtightness testing machines. Background technique [0002] Existing automobile hub air tightness testing machines generally use vertical or horizontal working platforms, and water is injected into the test barrel by the water injection system. The air leakage of the wheel hub is the air tightness test method chosen by most domestic manufacturers. The test water injection methods generally include the pressure injection water injection test method and the upper and lower water injection test method of the workpiece. The pressure injection water injection test method is the most widely used at present. He cooperates with the water storage tank and the caisson, and presses the water into the test barrel and pumps the water away through a piston-like movement while ensuring the airtight between the water storage ...

AI Technical Summary

Problems solved by technology

He cooperates with the water storage tank and the caisson, and presses the water into the test barrel and pumps the water away through a piston-like movement while ensuring the airtightness between the water storage tank and the caisson. This method requires high welding requirements for the water tank. , due to the continuous up and down movement of the caisson, colliding with the water storage tank, after a long time of use, it will cause fatigue and rupture of the welds of the water tank, resulting in water leakage

Images