Cooled seal cartridge

Claim 2

A seal assembly applicable to a rotary shaft to prevent fluid leakage between said rotary shaft and a case comprising: a housing having means for mounting the housing on said case, a stub shaft rotatable in said housing and having means connectable to said rotary shaft, said housing including means defining a seal chamber between said housing and said stub shaft, mechanical said means in said chamber for preventing fluid leakage between said stub shaft and said housing, said mechanical seal means forming with said housing a cooling fluid chamber, said housing having an inlet for said cooling fluid chamber and an outlet for said cooling fluid chamber, a cooling jacket disposed about said housing and having means providing a flOw path therein for cooling fluid flow, means connecting one end of said flow path to said inlet and means connecting the other end of said flow path to said outlet, whereby cooling fluid may flow from said outlet through said flow path, through said inlet, and through said cooling fluid chamber from said inlet to said outlet, and cooling fluid impelling means rotatable with said stub shaft for causing cooling fluid flow through said cooling fluid chamber from said inlet to said outlet, wherein said housing has a cylindrical outer surface, said cooling jacket being in the form of a sleeve applicable endwise to said housing, said housing and said sleeve having means forming end seals therebetween, and one of said housing and said cooling jacket having groove means in its surface between said end seals and confronted by the other of said cooling jacket and said sleeve, said groove means providing said flow path for cooling fluid flow.

Claim 3

A seal assembly as defined in claim 1, including air fan means carried by said stub shaft for forcing air over said cooling jacket.

Claim 4

A seal assembly as defined in claim 1, including air fan means carried by said stub shaft for forcing air over said cooling jacket, and shroud means for said fan carried by said jacket.

Claim 5

A seal assembly as defined in claim 1, including air fan means removably carried by said stub shaft, and shroud means for said fan removably carried by said cooling jacket.

Claim 6

A seal assembly as defined in claim 1, wherein said means connectable to said rotary shaft comprises a bolt extending through said stub shaft and key means on said stub shaft.

Claim 7

A seal assembly as defined in claim 1, including means releasably retaining said jacket on said housing.

Claim 8

A seal assembly as defined in claim 1, including means defining an external cooling fluid reservoir and means for connecting said reservoir to said flow path for cooling fluid flow.

Claim 9

A seal assembly as defined in claim 1, said means defining a seal chamber comprising end flanges removably secured on said housing, and said means for mounting said housing on said case including fastener means removably connecting said housing to said case, whereby said housing, said end flanges and said jacket are removable from said case as a unit.

Claim 10

A seal assembly as defined in claim 8, said means defining a seal chamber comprising end flanges removably secured on said housing, and said means for mounting said housing on said case including fastener means removably connecting said housing to said case, said mechanical seal means comprising non-rotatable and axially shiftable seal ring carried by said end flanges, and each of said seal rings having a radially extended face, and a pair of rotatable seal rings carried by said cooling fluid impelling means and each having a radial face opposed by the radial face of the respective non-rotatable seal rings.

Claim 11

A seal assembly as defined in claim 9, including compression spring means interposed between said end plates and said non-rotatable seal rings and expansible to bias the latter towards said rotatable seal ring, and retainer means carried by said end plates, said non-rotatable seal rings and said retainer means having abutment means for limiting expansion of said spring means during assembly.

Claim 12

A seal assembly as defined in claim 8, said mechanical seal means comprising non-rotatable and axially shiftable seal rings carried by said end flanges, each of said seal rings having a radially extended face, and rotatable seal ring means carried by said stub shaft for rotation therewith and having radial faces opposed by the radial faces of the respective non-rotatable seal rings.

Claim 13

A mechanical seal cartridge comprising: a rotatable stub shaft, a hollow housing disposed about said stub shaft, end flanges disposed about said stub shaft, means releasably connecting said end flanges to said housing, each of said end flanges carrying non-rotatable sealing ring means including an axially sHiftable seal ring having a radial seal face, the radial seal face of the respective seal rings being disposed in opposing axially spaced relation, rotatable sealing ring means carried by said stub shaft for rotation therewith and providing oppositely facing radial seal faces for engagement by said radial seal faces of the respective axially shiftable seal rings, and spring means interposed between said end flanges and said axially shiftable seal rings for biasing the latter towards said rotatable sealing ring means to effect said engagement of said radial seal faces, and including a cooling jacket disposed about said housing and having means defining a cooling fluid flow path therein, said housing having a pair of axially spaced ports leading between said cooling fluid flow path and the interior of said housing, said cooling fluid flow path, said pair of spaced ports, and said interior of said housing defining a fluid flow circuit wherein fluid may flow from said interior of said housing, through one of said pair of ports, through said cooling fluid flow path, through the other of said pair of ports, and back into said interior of said housing, and said rotatable sealing ring means including cooling fluid impelling means.

Claim 14

A mechanical seal cartridge comprising: a rotatable stub shaft, a hollow housing disposed about said stub shaft, end flanges disposed about said stub shaft, means releasably connecting said end flanges to said housing, each of said end flanges carrying non-rotatable sealing ring means including an axially sHiftable seal ring having a radial seal face, the radial seal face of the respective seal rings being disposed in opposing axially spaced relation, rotatable sealing ring means carried by said stub shaft for rotation therewith and providing oppositely facing radial seal faces for engagement by said radial seal faces of the respective axially shiftable seal rings, and spring means interposed between said end flanges and said axially shiftable seal rings for biasing the latter towards said rotatable sealing ring means to effect said engagement of said radial seal faces, and including a cooling jacket disposed about said housing and having means defining a cooling fluid flow path therein, said housing having a pair of axially spaced ports leading between said cooling fluid flow path and the interior of said housing, said cooling fluid flow path, said pair of spaced ports, and said interior of said housing defining a fluid flow circuit wherein fluid may flow from said interior of said housing, through one of said pair of ports, through said cooling fluid flow path, through the other of said pair of ports, and back into said interior of said housing, and said rotatable sealing ring means including cooling fluid impelling means.

Claim 15

A mechanical seal cartridge comprising: a rotatable stub shaft, a hollow housing disposed about said stub shaft, end flanges disposed about said stub shaft, means releasably connecting said end flanges to said housing, each of said end flanges carrying non-rotatable sealing ring means including an axially shiftable seal ring having a radial seal face, the radial seal face of the respective seal rings being disposed in opposing axially spaced relation, rotatable sealing ring means carried by said stub shaft for rotation therewith and providing oppositely facing radial seal faces for engagement by said radial seal faces of the respective axially shiftable seal rings, and spring means interposed between said end flanges and said axially shiftable seal rings for biasing the latter towards said rotatable sealing rings means to effect said engagement of said radial seal faces, a cooling jacket disposed about said housing and having means defining a cooling fluid flow path therein, said housing having a pair of axially spaced ports leading between said cooling fluid flow path and the interior of said housing, said cooling fluid flow path, said pair of spaced ports, and said interior of said housing defining a fluid flow circuit wherein fluid may flow from said interior of said housing, through one of said pair of ports, through said cooling fluid flow path, through the other of said pair of ports, and back into said interior of said housing, and said rotatable sealing ring means including cooling fluid impelling means, said rotatable sealing ring means comprising a carrier ring mounted on said stub shaft, said carrier ring having oppositely opening axial bores, seal rings in said bores having said radial seal faces thereon, and static sealing means between said seal rings in said bores and said carrier ring.

Claim 16

A mechanical seal cartridge comprising: a rotatable stub shaft, a hollow housing disposed about said stub shaft, end flanges disposed about said stub shaft, means releasably connecting said end flanges to said housing, each of said end flanges carrying non-rotatable sealing ring means including an axially shiftable seal ring having a radial seal face, the radial seal face of the respective seal rings being disposed in opposing axially spaced relation, rotatable sealing ring means carried by said stub shaft for rotation therewith and providing oppositely facing radial seal faces for engagement by said radial seal faces of the respective axially shiftable seal rings, and spring means interposed between said end flanges and said axially shiftable seal rings for biasing the latter towards said rotatable sealing rings means to effect said engagement of said radial seal faces, a cooling jacket disposed about said housing and having means defining a cooling fluid flow path therein, said housing having a pair of axially spaced ports leading between said cooling fluid flow path and the interior of said housing, said cooling fluid flow path, said pair of spaced ports, and said interior of said housing defining a fluid flow circuit wherein fluid may flow from said interior of said housing, through one of said pair of ports, through said cooling fluid flow path, through the other of said pair of ports, and back into said interior of said housing, and said rotatable sealing ring means including cooling fluid impelling means, said rotatable sealing ring means comprising a carrier ring mounted on said stub shaft, said carrier ring having oppositely opening axial bores, seal rings in said bores having said radial seal faces thereon, and static sealing means between said seal rings in said bores and said carrier ring.