Pump
The present disclosure provides a pump including a housing having a shaft hole, a membrane assembly disposed inside the housing, and a shaft assembly mounted on the housing. The shaft assembly includes a shaft inserted into the shaft hole, and a sealing member disposed on an end portion of the shaft and having a plurality of contact regions on an inner surface of the housing along a longitudinal direction of the shaft.
1. A pump comprising:
a housing having a shaft hole;
a membrane assembly disposed inside the housing; and
a shaft assembly mounted on the housing,
wherein the shaft assembly includes:
a shaft inserted into the shaft hole; and
a sealing member disposed on an end portion of the shaft and having a plurality of contact regions on an inner surface of the housing along a longitudinal direction of the shaft,
wherein the sealing member includes:
a body into which the shaft is inserted, and having a concave surface disposed forward in an axial direction of the shaft;
a first protrusion protruding from the body in a radial direction of the shaft;
a first groove disposed between the body and the first protrusion and having a first depth;
a second protrusion disposed on a side opposite to the first protrusion; and
a second groove disposed between the body and the second protrusion and having a second depth to be different from the first depth; and
wherein the shaft includes:
a first supporter disposed inside the sealing member and extending in a radial direction; and
a second supporter disposed outside the sealing member and supporting the body of the sealing member.
2. The pump of claim 1 , wherein in the sealing member, at least one of the first protrusion and the second protrusion protrudes from an outer circumferential surface of the body.
3. The pump of claim 1 , wherein the sealing member includes a sidewall having a concave surface, disposed between the first protrusion and the second protrusion.