1. A mechanical seal, comprising a gland for being mounted on a housing, a rotating assembly for being connected with a shaft, and two stationary seal rings separately received in the gland and axially arranged between the gland and rotating assembly, with an inner wall of the gland defining a shaft bore for the rotating assembly as well as the shaft to pass through, with the rotating assembly comprising:
a retainer having a primary ring, a plurality of first slide legs, and a plurality of second slide legs, with the primary ring being coaxial with the shaft bore and defining a first axial surface and a second axial surface at two axial ends thereof, and a plurality of spring holes communicating the said first and second axial surfaces, with the first slide legs being formed on the first axial surface and axially extending outwards while an free end of each first slide leg has a first engaging block protruding to an axial line of the shaft bore, with the second slide legs being formed on the second axial surface and axially extending outwards while an free end of each second slide leg has a second engaging block protruding to the said axial line;
a first compression ring being coaxial with the shaft bore and formed with at least one cutaway portion at an outer periphery thereof, with the first compression ring being movably positioned between the first axial surface and the first engaging block in axial direction, and being radially surrounded by the first slide legs;
a second compression ring being coaxial with the shaft bore and also formed with at least one cutaway portion at an outer periphery thereof, with the second compression ring being movably positioned between the second axial surface and the second engaging block in axial direction, and being radially surrounded by the second slide legs;
a plurality of spring members separately received in the spring holes and oppositely abutting against the first and second compression rings with two ends;
a first rotating seal ring having one end being abutted by the first compression ring, with a plurality of first notches formed in a outer periphery of the first rotating seal ring, with an amount of the first notches being not less than an amount of the first slide legs for each first slide leg to be received in and engaged with one of the first notches;
a second rotating seal ring having one end being abutted by the second compression ring, with a plurality of second notches formed in a outer periphery of the second rotating seal ring, with an amount of the second notches being not less than an amount of the second slide legs for each second slide leg to be received in and engaged with one of the second notches; and
a shaft sleeve for being connected with the shaft sequentially passing through the first rotating seal ring, first compression ring, primary ring of the retainer, second compression ring, and second rotating seal ring;
wherein the spring members oppositely pushe the first and second rotating seal rings through the first and second compression rings, and the first and second rotating seal rings respectively abut against the two stationary seal rings to form an interface between the first rotating seal ring and one of the stationary seal rings and another interface between the second rotating seal ring and the other stationary seal ring;
wherein a smallest distance form the axial line of the shaft bore to each cutaway portion is not larger than a distance from the said axial line to each first or second engaging block, and radiuses of the outer peripheries of the two compression rings out of the at least one cutaway portion are larger than the said distance between the said axial line and each first or second engaging block, but are not larger than a smallest distance form the said axial line to each slide leg excluded the engaging blocks;
wherein the at least one cutaway portion of the first compression ring is mis-aligned with each first slide leg for the first compression ring to be limited between the first engaging blocks and the first axial surface, and the at least one cutaway portion of the second compression ring is mis-aligned with each second slide leg for the second compression ring to be limited between the second engaging blocks and the second axial surface.
2. The mechanical seal as defined in claim 1, wherein an annular groove is provided on an inner periphery of the shaft sleeve and receives an O-ring.
3. The mechanical seal as defined in claim 1, wherein a positioning flange is disposed at an outer periphery of the shaft sleeve adjacent to the first rotating seal ring to limit an axial movement of an O-ring or the first rotating seal ring.
4. The mechanical seal as defined in claim 1, wherein an end of the shaft sleeve adjacent to the first rotating seal ring forms a stirring unit facing the said interface between the first rotating seal ring and the corresponding stationary seal ring outwards.
5. The mechanical seal as defined in claim 4, wherein, the stirring unit is formed by at least one helical groove or helical blade, with a circular extending direction of each helical groove or helical blade being opposite to a rotating direction of the shaft.
6. The mechanical seal as defined in claim 1, wherein at least one untaken notch is inclined relative to the first or second slide leg when the number of the notches of the first or second rotating seal ring is larger than the number of the first or second slide leg.
7. The mechanical seal as defined in claim 1, wherein gland further comprises a fluid inlet communicating the outside of the gland and the shaft bore.
8. The mechanical seal as defined in claim 7, wherein a fluid guiding member is mounted on the inner wall of the gland, between the said inner wall and the rotating assembly, and adjacent to the fluid inlet.
9. The mechanical seal as defined in claim 8, wherein the fluid guiding member is in a ring shape and coaxial with the shaft bore, and has a channel aligning with the fluid inlet, with each of two opposite edges that define the channel providing a guiding surface adjacent to and obliquely facing the fluid inlet.
10. The mechanical seal as defined in claim 8, wherein the fluid guiding member is in a tube shape being coaxial with the shaft bore 1 and having a first axial end with a plurality of radial grooves and a second axial end with a radial extended annular protrusion.
11. The mechanical seal as defined in claim 7, wherein the gland further comprises a fluid outlet communicating the outside of the gland and the shaft bore.
12. The mechanical seal as defined in claim 11, wherein the fluid inlet and fluid outlet radially extend in different axial levels relative to the shaft bore, with another fluid guiding member being mounted on the inner wall of the gland, between the said inner wall and the rotating assembly, and adjacent to the fluid outlet.
13. The mechanical seal as defined in claim 12, wherein the said another fluid guiding member is in a ring shape and coaxial with the shaft bore, and has a channel aligning with the fluid outlet, with at least one of two opposite edges that define the channel providing a guiding surface adjacent to and obliquely facing the fluid outlet.
14. The mechanical seal as defined in claim 11, wherein the fluid inlet and fluid outlet radially extend in an axial level relative to the shaft bore, with the fluid guiding member being also adjacent to the fluid outlet.
15. The mechanical seal as defined in claim 14, wherein the fluid guiding member is in a ring shape and coaxial with the shaft bore, and has a channel aligning with both of the fluid inlet and fluid outlet, with each of two opposite edges that define the channel providing a guiding surface, with the two guiding surface adjacent to and obliquely facing the fluid inlet and fluid outlet respectively.
16. The mechanical seal as defined in claim 1 further comprising a limiting member firmly engaged on the inner wall of the gland, adjacent to the stationary seal ring abutted by the first rotating seal ring, and radially protruding inwards.
17. The mechanical seal as defined in claim 16, wherein the limiting member is formed in a ring shape and coaxial with the shaft bore.
18. The mechanical seal as defined in claim 17, wherein a plurality of through holes extending between two axial faces of the limiting member.
19. The mechanical seal as defined in claim 1 further comprises an auxiliary guiding unit formed on an outer periphery of the primary ring.
20. The mechanical seal as defined in claim 19, wherein the auxiliary guiding unit is formed by at least one helical blade.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A plume-reducing cooling tower comprising:
a housing having a space formed therein, the housing including a lower air inlet formed at a lower portion thereof for allowing external air to enter the space thereof and an upper air outlet formed at an upper portion thereof for exhausting exhausted gas;
a filler-unit provided at a place above the lower air inlet in the housing for allowing external air to pass therethrough and flow upward;
a treated-water spraying unit provided above the filler-unit in the housing for spraying treated-water on the filler-unit;
a discharging unit provided above the treated-water spraying unit in the housing for electrifying mist, which is contained in water vapor formed by a contact between treated-water and the external air, through a corona discharge and collecting mist; and
an exhausting unit provided at the upper air outlet for exhausting exhausted air passed through the discharging unit.
2. The plume-reducing cooling tower of claim 1, wherein the housing further comprises:
a water-collecting reservoir having a sealed a lower end for collecting treated-water sprayed from the treated-water spraying unit;
a treated-water inlet formed at a lower portion of the housing, the treated-water inlet being formed below a surface of the treated-water collected in the water-collecting reservoir; and
a treated-water pipe connected to the treated-water inlet via one portion thereof and connected to the treated-water spraying unit through the other portion thereof for supplying treated-water.
3. The plume-reducing cooling tower of claim 1, further comprising a cooling water spraying unit disposed above the treated-water spraying unit for spraying cooling water having a temperature relatively lower than that of treated-water sprayed from the treated-water spraying unit to an upper end of the treated-water spraying unit.
4. The plume-reducing cooling tower of claim 3, wherein the housing further comprises a cooling water pipe inlet provided above the treated-water spraying unit; and the cooling water spraying unit further includes a hollow cooling water spraying pipe placed above the treated-water spraying unit for spraying cooling water through a spraying hole formed on a lower portion thereof and a cooling water pipe extended from an outside of the housing to an inside of the housing through the cooling water pipe inlet and connected to the cooling water spraying pipe for supplying cooling water to the cooling water spraying pipe.
5. The plume-reducing cooling tower of claim 4, wherein
the housing further comprises a treated-water pipe inlet formed on a lower portion thereof; and
the cooling water spraying unit further comprises:
a treated-water pipe extended from an outside of the housing to an inside of the housing through the treated-water pipe inlet;
a circulation pump connected to the treated-water pipe via an inlet thereof and connected to the cooling water pipe via an outlet thereof for receiving treated-water collected in a low portion of the housing through the treated-water pipe and supplying treated-water to the cooling water pipe; and
a cooling unit surrounding the treated-water pipe or the cooling water pipe for cooling treated-water through process cooling water supplied from an outside.
6. The plume-reducing cooling tower of claim 1, further comprising a heat-exchanging unit disposed above the treated-water spraying unit to cool water vapor flowing upward to the treated-water spraying unit.
7. The plume-reducing cooling tower of claim 6, wherein the heat-exchanging unit comprises:
a hollow cooling pipe in which cooling water flows;
a cooling water supplying pipe connected to one side of the cooling pipe for supplying cooling water to the cooling pipe; and
a cooling water exhausting pipe connected to the other side of the cooling pipe for exhausting cooling water flowing from the cooling pipe.
8. The plume-reducing cooling tower of claim 7, wherein the cooling pipe comprises a plurality of transverse cooling pipes extended from one side to the other side and spaced from each other and two longitudinal cooling pipes extended in the direction which is perpendicular to the transverse cooling pipes, the longitudinal cooling pipes being connected to both ends of each transverse cooling pipe, respectively, and wherein the cooling water supplying pipe and the cooling water exhausting pipe are connected to the longitudinal cooling pipes cooling pipes, respectively.
9. The plume-reducing cooling tower of claim 7, wherein the housing further comprises:
a cooling water supplying pipe through port through which the cooling water supplying pipe passes; and
a cooling water exhausting pipe through port through which the cooling water exhausting pipe passes.
10. The plume-reducing cooling tower of claim 1, wherein the discharging unit further comprises:
a plurality of discharge electrodes extended in the vertical direction and spaced from each other in the horizontal direction between the water-collecting plates; and
a plurality of discharge electrodes extended in the horizontal direction between the discharge electrodes and spaced from each other in the vertical direction, each discharge electrode comprising a supporting rod extended in the horizontal direction and a discharge plate having a coupling hole formed at a central portion thereof and a protrusion formed on an outer surface thereof to allow the discharge plate to be coupled to the supporting rod through the coupling hole,
wherein a corona discharge is performed between the discharge plate of the discharge electrode and the water-collecting plate.
11. The plume-reducing cooling tower of claim 1, wherein the discharging unit further comprises:
a plurality of water-collecting plates formed such a plurality of water-collecting passages are arranged in a plane; and
a discharge electrode inserted in the water-collecting passage for allowing a corona discharge to be caused between the discharge electrode and the water-collecting plate.
12. The plume-reducing cooling tower of claim 11,
wherein the plurality of water-collecting plates are formed in the shape of a plate, placed in the housing in the vertical direction and spaced from each other in the horizontal direction,
wherein the plurality of discharge electrodes are extended in the vertical direction and spaced from each other in the horizontal direction between the water-collecting plates,
wherein each of the discharge electrode comprises a supporting rod extended in the vertical direction and a discharge plate having a coupling hole formed at a central portion thereof and a protrusion formed on an outer surface thereof to allow the discharge plate to be coupled to the supporting rod through the coupling hole, and
wherein a corona discharge is performed between the discharge plate of the discharge electrode and the water-collecting plate.
13. The plume-reducing cooling tower of claim 11, wherein the water-collecting plates are disposed such that hollow water collecting passages having opened upper and lower ends are arranged in the lattices, wherein each of the discharge electrode comprises a supporting rod extended in the vertical direction and placed in the water-collecting passage of the water-collecting plate and a discharge plate having a coupling hole formed at a central portion thereof and a protrusion formed on an outer surface thereof to allow the discharge plate to be coupled to the supporting rod through the coupling hole, and wherein a corona discharge is performed between the discharge plate of the discharge electrode and the water-collecting plate.
14. The plume-reducing cooling tower of claim 11, wherein each water-collecting passage has opened upper and lower ends and has a hollow triangular column shape, a hollow rectangular column shape, hollow a cylinder shape or a hollow hexagonal column, and the water-collecting passages are arranged in the lattices.
15. The plume-reducing cooling tower of claim 12, wherein the discharging unit further comprises:
a supporting frame placed above the water-collecting plate and supporting the discharge electrode to allow the discharge electrode to be spaced from the water-collecting plate; and
an insulator module supporting the supporting frame at an inside of the water-collecting plate for electrically isolating the water-collecting plate from the discharge electrode.
16. The plume-reducing cooling tower of claim 15, wherein the supporting frame is equipped with a plurality of transverse frames coupled to an upper end of the supporting rod and a longitudinal frame coupled to both sides of the transverse frame, and wherein the insulator module comprises a securing rod coupled to the transverse frame, an insulator coupled to the securing rod and a securing plate coupled to a lower portion of the insulator and secured to an inner surface of the water-collecting passage of the water-collecting plate at certain height.
17. The plume-reducing cooling tower of claim 15, wherein the supporting frame is equipped with a plurality of transverse frames coupled to an upper end of the supporting rod and a longitudinal frame coupled to both sides of the transverse frame, and wherein the insulator module comprises a securing rod coupled to the transverse frame, an insulator coupled to the securing rod and a securing plate coupled to a lower portion of the insulator and placed on an upper surface of the water-collecting passage of the water-collecting plate.
18. The plume-reducing cooling tower of claim 16, wherein the insulator module further comprises an upper block coupled to a lower portion of the fixing rod and to an upper portion of the insulator and a lower block coupled to a lower portion of the insulator and to an upper portion of the fixing plate.
19. The plume-reducing cooling tower of claim 1, wherein the housing further comprises an upper air inlet formed between the treated-water spraying unit and the discharging unit to allow external air to be introduced.
20. The plume-reducing cooling tower of claim 1, wherein the housing further comprises a third air inlet formed between the discharging unit and the exhausting unit to allow external air to be introduced.
21. The plume-reducing cooling tower of claim 10, wherein the water-collecting plate has a vertical height of 200 to 1,000 mm, the discharge plates are spaced from each other at a vertical distance of 5 to 100 mm in the vertical direction, and the water-collecting plate and the protrusion of the discharge plate are spaced from each other at a horizontal distance of 50 to 200 mm in the horizontal direction.
22. The plume-reducing cooling tower of claim 1, wherein the discharging unit further comprises:
a plurality of water-collecting plates formed in the shape of a plate, placed in the housing in the vertical direction and spaced from each other in the horizontal direction; and
a plurality of discharge electrodes formed in the shape of a plate corresponding to the water-collecting plate and placed between the water-collecting plates in the vertical direction,
wherein a corona discharge is performed between the discharge electrode and the water-collecting plate.