초록 ▼

A high pressure liquid sealing connection between two relatively rotatable liquid passage members of a rotary nozzle or a swivel. The connection is formed by two abutting relatively rotatable annular coaxial sealing members forming a high pressure liquid passage between the relatively rotatable memb

A high pressure liquid sealing connection between two relatively rotatable liquid passage members of a rotary nozzle or a swivel. The connection is formed by two abutting relatively rotatable annular coaxial sealing members forming a high pressure liquid passage between the relatively rotatable members. Both sealing members are carried and kept coaxial by a seal holder carried by one of the relatively rotatable passage members. Both sealing members are forced axially relative to the seal holder by high pressure liquid flow at the sealing connection to maintain a dynamic sealing relationship between the sealing members and to force one of the sealing members into sealing contact with and rotation with the other of the relatively rotatable passage members. As the other sealing member substantially wears away by relative rotation of the sealing members it is forced axially relative to the seal holder and toward the one sealing member to maintain the sealing integrity of the sealing connection.

대표청구항 ▼

[ What is claimed is:] [1.] A nozzle assembly for spraying high pressure cleaning liquid against an object to be cleaned and comprising:a hollow cylindrical housing body,a tubular shaft member rotatable coaxially within the housing body and having a liquid input end within and near one end of said h

[ What is claimed is:] [1.] A nozzle assembly for spraying high pressure cleaning liquid against an object to be cleaned and comprising:a hollow cylindrical housing body,a tubular shaft member rotatable coaxially within the housing body and having a liquid input end within and near one end of said housing body,said shaft member having an output end near a second end of the housing body and including means at said output end for securing a spray head for rotation with the shaft,said body having a high pressure liquid inlet passage,a sealing assembly forming a high pressure sealed passage between the inlet passage of said body and the liquid input end of said shaft,said sealing assembly including a seal holder and first and second seal members,axially spaced bearing means between said shaft and said inner cylindrical surface of the housing body to rotatably support said shaft coaxially within the housing body and to prevent axial movement of the shaft when the shaft is subject to high forwardly directed thrust forces from internal pressures on the seal members,means defining a sealed chamber enclosing said bearing means and a lubricant therefor between said housing body and said shaft,said seal holder being an annular member in fixed relationship to said housing body,said first and second seal members being annular cylindrical members having abutting end faces and coaxial passages aligned with the liquid input end of the shaft,said first seal member being made of a tough extrusion-resistant material,said second seal member being made of hard wear resistant material,said seal holder being located opposite to the input end of the shaft and having a counterbored coaxial cylindrical recess enclosing the first seal member and partially enclosing the second seal member to maintain the seal members and the shaft in coaxial alignment and with the second seal member abutting the shaft in sealing relationship therewith during high pressure spraying operation of the nozzle.