长期以来,我国砖瓦行业的真空挤砖机场配用机械往复式 W 型真空泵。该泵在砖瓦行业的使用情况并不十分理想,由于易损、漏气,该泵使用一段时间,泵本身真空度只能维持在0.085兆帕左右。而生产薄壁高强度空心制品,真空挤砖机的真空度是必要的技术条件之一,其真空度一般在0.090兆帕以上。国外先进水平的真空挤砖真空度一般在0.095兆帕以上。在此情况下辽宁省辽阳北方真空设备厂, For a long time, China’s brick and tile industry vacuum brick airport equipped with mechanical reciprocating W-type vacuum pump. The pump in the brick and tile industry, the use of the situation is not very satisfactory, due to vulnerability, leakage, the pump for some time, the pump itself can only maintain a vacuum of about 0.085 MPa. The production of hollow hollow thin-walled products, the vacuum vacuum brick extruder is one of the necessary technical conditions, the vacuum is generally above 0.090 MPa. Foreign advanced level of vacuum brick vacuum generally more than 0.095 MPa. In this case, Liaoyang Northern Liaoning Vacuum Equipment Factory,