Filtering device

The utility model discloses a filtering device which is characterized in that a filtering assembly is arranged and comprises filtering cotton and oil absorption felt, so that impurities such as water, oil, dust particles and the like extracted from a screw rod of an exhaust main engine enter a barrel main body through an air inlet; impurities such as water, oil, dust particles and the like pumped out by the main machine screw are filtered out through the barrel inner container, the filter cotton and the oil absorption felt, and relatively clean gas after filtration enters an external vacuum pump through the gas outlet, so that the air entering the external vacuum pump is filtered sufficiently clean; and the vacuum degree can be effectively ensured under the condition that the external vacuum pump is protected from being damaged easily, so that stable production is ensured, the yield of a user is improved, and the production cost is reduced. 本实用新型公开了一种过滤装置，通过设置过滤组件，过滤组件包括过滤棉和吸油毡，从排气主机螺杆抽出来的水分、油、灰尘颗粒物等杂质通过进气口进入