Filter, reciprocating pump, which the filter is used, and assembling method of the filter in a valve seat element of the piston pump

摘要

Piston pump with a pump housing (11), which defines a cylinder (12), a piston (13), the in such - and fro in the cylinder (12) is introduced, that it comprises a pump chamber (19) in the cylinder (12) is defined, wherein the pump chamber (19) has a volume with the direction of which - and forth movement of the piston (13); a discharge valve (40), which at an outlet (21) of the pump chamber (19) is provided, and a tubular valve seat element (41) has, which has a base and a filter assembly hole (41a) defined, which has an aperture of the pump chamber (19), and a filter (1) which, in the form of a flat metal plate with a main body (2) with a plurality of filter holes (4) in its middle section is formed and is provided in the filter assembly hole (41a) and is fixed in this position, wherein said filter (1) a plurality of projections (3) has, extending from an outline of the main body (2) in one piece and extend radially outwards, so that they are spaced apart from one another in the circumferential direction, characterised in that the filter (1) in the filter assembly hole (41a) is accommodated, wherein the projections (3) to the opening of the filter assembly hole (41a) are bent in the direction, while they are in contact with an inner surface of the filter assembly hole (41a) are located, as a result of which the filter (1) on the valve seat element (41) from the contact between the projections (3) and the inner surface of the filter assembly hole (41a) is fixed.