Rotating positive displacement scroll apparatus with lubricating pump
AssigneeSundstrand Corporation
InventorEdward S. Blain
Life of this patent
Estimating the term…
Abstract
A positive displacement machine including first and second scrolls having interfitting vanes adapted to define at least one traveling pocket. One of the scrolls has a central outlet and a hollow shaft mounts the scroll for rotation. A machine housing contains the scrolls and the shaft and has an outlet port. A transfer tube is stationarily mounted in the housing in fluid communication with the port and extends into one end of the shaft. A seal seals the interface of the transfer tube and the shaft.
Claims11
A positive displacement machine comprising:
- first and second scrolls having interfitting vanes adapted to define at least one travelling pocket in which a fluid may be received, one of said scrolls having a central outlet;
- means, including a hollow shaft, mounting said scrolls for rotation, one end of said hollow shaft being connected to said one scroll about said outlet;
- a machine housing containing said scrolls and said mounting means and having an outlet port;
- a transfer tube stationarily mounted in said housing in fluid communication with said outlet port and extending into the other end of said shaft;
- and
- means sealing the interface of said transfer tube and said shaft, the outer diameter of said transfer tube being sufficiently less than the inner diameter of said shaft so that an annular space exists therebetween;
- and said sealing means being guided by said transfer tube into sealing engagement with said shaft other end;
- means in said annular pace defining a pumping configuration responsive to rotation of said shaft relative to said tube for directing lubricant from a lubricant source through said annular space toward said sealing means.
A positive displacement machine comprising:
- first and second scrolls having interfitting vanes adapted to define at least one fluid receiving pocket movable between a radially inner port and a radially outer port upon rotary translation of one scroll relative to the other;
- means including at least one rotary shaft, mounting said scrolls for rotation and said rotary translation;
- an annular housing affixed to said shaft for rotation therewith and including an inlet through which lubricant may be introduced into said housing;
- a stationarily mounted lubricant pick-up tube within said housing and having an open end facing oppositely of the intended direction of rotation of said shaft;
- means in fluid communication with said pick-up tube for conveying lubricant picked up by said tube to a point of use within said machine;
- a drain in said housing radially inwardly of said open end for allowing lubricant and contaminants therein to exit said housing when said shaft is not being rotated;
- a machine housing containing said scrolls, said mounting means, said annular housing and said pick-up tube and further defining a lubricant sump, said inlet being located radially inwardly of said pick-up tube and in fluid communication with said sump;
- and a cap on said machine housing below said sump, said cap being in fluid communication with said drain and with said sump radially outwardly of said drain.
A positive displacement machine comprising:
- first and second scrolls having interfitting vanes adapted to define at least one fluid receiving pocket movable between a radially inner port and a radially outer port upon rotary translation of one scroll relative to the other;
- means including at least one rotary shaft, mounting said scrolls for rotation and said rotary translation;
- an annular housing affixed to said shaft for rotation therewith and including an inlet through which lubricant may be introduced into said housing;
- a stationarily mounted lubricant pick-up tube within said housing and having an open end facing oppositely of the intended direction of rotation of said shaft;
- means in fluid communication with said pick-up tube for conveying lubricant picked up by said tube to a point of use within said machine;
- said shaft being hollow and being periodically in fluid communication with said pocket;
- a machine housing containing said scrolls and said shaft and having a fluid port;
- a transfer tube stationarily mounted in said machine housing and extending into said hollow shaft and being in fluid communication with said fluid port;
- and
- means sealing the interface of said shaft and said transfer tube;
- said sealing means comprising a flat seal guided into sealing engagement with an end of said shaft by said transfer tube.
The positive displacement machine of claim 14 further including a bellows sealed to said machine housing about said fluid port and engaging said flat seal oppositely of said end of said shaft and urging said seal against said end of said shaft.
Dependencies are inferred from the claim text.