论文部分内容阅读
目前我国生产消防用水泵的引水器,有排气引水器,水环泵和滑片泵(又称叶片泵)。消防车上使用较常见的是以水环泵或滑片泵为主要引水设备,而以排气引水器作为辅助引水器。手抬机动消防泵则单独以水环泵为引水器(如BJ22、BJ25D、BJ25A等)或排气引水器(如BJ7),以及采用滑片泵(如BJ10等),而不设置辅助引水器。 这几种引水器,从性能上说,排气引水器的真空度较低,一般在500～600毫米汞柱,此外,由于利用内燃机的排气系统,致使内
At present, China’s production of water pumps for fire pumps, exhaust drains, water ring pumps and vane pumps (also known as vane pumps). The most common use of fire engines is the water ring pump or vane pump as the main water diversion equipment, while the exhaust pilot as a secondary pilot. Hand lift motor fire pump alone water ring pump as a pilot (such as BJ22, BJ25D, BJ25A) or exhaust pilot (such as BJ7), and the use of vane pumps (such as BJ10, etc.), without the auxiliary pilot . These types of pilot, from the performance point of view, the pilot vacuum is low, typically 500 ~ 600 mm Hg, in addition, due to the use of internal combustion engine exhaust system, resulting in