A shaft assembly for use in a temperature-controlled K-mixer is provided, along with the mixer including the shaft assembly. The shaft assembly includes an inner hollow shaft defining an inner passage, and an outer hollow shaft coaxially surrounding the inner hollow shaft. An outer passage extends b
A shaft assembly for use in a temperature-controlled K-mixer is provided, along with the mixer including the shaft assembly. The shaft assembly includes an inner hollow shaft defining an inner passage, and an outer hollow shaft coaxially surrounding the inner hollow shaft. An outer passage extends between the inner and outer hollow shafts. The shaft also includes a plurality of blades extending from the outer hollow shaft, for mixing the material. Each of the blades is provided with channels. The inner passage, the channels and the outer passage form a continuous flow path allowing a pressurized fluid to circulate within inner and outer hollow shafts and the blades, for controlling temperature of the shafts and the blades. The channels allow a flow of the fluid in the blades in an opposite direction of a rotational direction of the shaft assembly.
대표청구항▼
1. A temperature-controlled K-mixer for thermally and kinetically treating a material, the K-mixer comprising: a substantially cylindrical stationary chamber for containing the material, the chamber having a chamber inlet for receiving the material and a chamber outlet for discharging the material;a
1. A temperature-controlled K-mixer for thermally and kinetically treating a material, the K-mixer comprising: a substantially cylindrical stationary chamber for containing the material, the chamber having a chamber inlet for receiving the material and a chamber outlet for discharging the material;a shaft assembly coaxial with the chamber and having a portion extending in the stationary chamber, the shaft assembly comprising: an inner hollow shaft defining an inner passage extending therein;an outer hollow shaft coaxially surrounding and spaced away from the inner hollow shaft, the outer hollow shaft forming an outer passage with the inner hollow shaft, the outer passage extending between the inner and outer hollow shafts, the inner and outer passages being in fluid communication with each other;a motor end connectable to a motor for rotating the shaft assembly;a joint end connectable to a rotary joint, the joint end having a fluid inlet and a fluid outlet, each communicating with a respective one of the inner and outer passages; anda plurality of blades extending from the outer hollow shaft in the stationary chamber, for mixing the material, the blades being respectively formed from at least one solid plate having walls defining a thickness provided with a plurality of channels extending therein, the channels being formed at least partially within the thickness of said at least one plate, each blade comprising a channel inlet communicating with one of the passages, and a channel outlet communicating with the other one of the passages; wherein the K-mixer is adapted for operating at speeds greater than 400 RPM and wherein the inner passage, the channels and the outer passage form a continuous flow path allowing a pressurized fluid to circulate within inner and outer hollow shafts and through the plurality of blades, from the fluid inlet to the fluid outlet, for controlling a temperature of the shafts and a temperature of the blades, allowing a flow of the fluid in the blades in an opposite direction of a rotational direction of the shaft assembly. 2. The temperature-controlled K-mixer according to claim 1, wherein each of the blades has a body with a mounting end operatively mounted to the outer hollow shaft, and an outer end opposed to the mounting end, at least some of the channels of each blade extending from the mounting end to the outer end. 3. The temperature-controlled K-mixer according to claim 1, wherein for each of the blades, the channels are shaped and configured as U-shaped channels. 4. The temperature-controlled K-mixer according to claim 3, wherein the walls comprise: opposed first and second lateral and substantially planar faces which are also substantially parallel to a transverse cross-section of the hollow shafts;anda plurality of channel sidewalls extending between the walls, part of said at least one plate, delimiting the channels. 5. The temperature-controlled K-mixer according to claim 4, wherein at least one of the sidewalls has an I-shape or an L-shape. 6. The temperature-controlled K-mixer according to claim 2, wherein each of the blades comprises a mounting mechanism including a mounting plate affixed to the hollow shaft, the mounting plate being provided with a groove receiving the mounting end of the blade for removably connecting the blade to the outer hollow shaft, for allowing replacement of the blade. 7. The temperature-controlled K-mixer according to claim 1, comprising pairs of connecting tubes associated with the respective blades, the tubes being distinct from the plates forming the blades, the connecting tubes extending radially relative to the hollow shafts, the connecting tubes connecting the channel inlets and the channel outlets to one of the inner and outer passages, respectively. 8. The temperature-controlled K-mixer according to claim 7, wherein each of the blades is provided with a flow adjustment device sized to individually control the flow of fluid within each blade. 9. The temperature-controlled K-mixer according to claim 1, wherein the fluid inlet is connected to the inner passage and the fluid outlet is connected to the outer passage, the fluid being fed through the inner passage and returning to the outlet through the outer passage. 10. The temperature-controlled K-mixer according to claim 9, wherein for each of the blades, the channel inlet communicates with the inner passage and the channel outlet communicates with the outer passage. 11. The temperature-controlled K-mixer according to claim 1, wherein the fluid inlet is connected to the outer passage and the fluid outlet is connected to the inner passage, the fluid being fed through the outer passage and returning to the fluid outlet through the inner passage. 12. The temperature-controlled K-mixer according to claim 11, wherein for each of the blades, the channel inlet communicates with the outer passage and the channel outlet communicates with the inner passage. 13. The temperature-controlled K-mixer according to claim 1, comprising a return flow adjustment mechanism disposed between the inner and outer passages, for controlling flow of the fluid between the inner and the outer passages and an exit flow of the blades. 14. The temperature-controlled K-mixer according to any one of claim 1, wherein at least one of the blades extends radially relative to the outer hollow shaft. 15. The temperature-controlled K-mixer according claim 1, wherein at least one of the blades extends at an angle relative to a radial direction from the outer hollow shaft. 16. The temperature-controlled K-mixer according to claim 15, wherein said chamber comprises opposed end sidewalls, and wherein said at least one of the blades comprises two blades respectively positioned close to said sidewalls, acting as scrapers to push the material toward a center of mixing chamber, away from the sidewalls. 17. The temperature-controlled K-mixer according to claim 1, wherein cross-sectional area of the inner passage substantially matches cross-sectional area of the outer passage. 18. The temperature-controlled K-mixer according to claim 1, wherein of the channels are sized and shaped to promote fluid flow within the blades. 19. The temperature-controlled K-mixer according to claim 1, comprising a fluid source for providing the fluid with the continuous flow path. 20. The temperature-controlled K-mixer according to claim 19, wherein the fluid source is a source of cooling fluid. 21. The temperature-controlled K-mixer according to claim 19, wherein the fluid source is a source of heating fluid. 22. The temperature-controlled K-mixer according to claim 1, wherein the outer surfaces of the blades are non-uniform. 23. The temperature-controlled K-mixer according to claim 1, wherein at least one of the blades is twisted longitudinally. 24. The temperature-controlled K-mixer according claim 1, comprising at least one temperature sensor for sensing the temperature of the material in the chamber, wherein coolant in the blades circulates based on the temperature of the material. 25. The temperature-controlled K-mixer according claim 1, wherein the channels in the blades are substantially concentric. 26. The temperature-controlled K-mixer according to claim 1, wherein the channels are machined or drilled in said at least one plate. 27. The temperature-controlled K-mixer according to claim 26, wherein said at least one plate comprises a solid metallic plate. 28. The temperature-controlled K-mixer according to claim 26, wherein said at least one plate comprises two pieces of metal seal welded together, the plurality of channels being formed at the interface of the two pieces. 29. A temperature-controlled K-mixer for thermally and kinetically treating a material, the K-mixer comprising: a substantially cylindrical stationary chamber for containing the material, the chamber having a chamber inlet for receiving the material and a chamber outlet for discharging the material;a shaft assembly coaxial with the chamber and having a portion extending in the stationary chamber, the shaft assembly comprising: an inner hollow shaft defining an inner passage extending therein;an outer hollow shaft coaxially surrounding and spaced away from the inner hollow shaft, the outer hollow shaft forming an outer passage with the inner hollow shaft, the outer passage extending between the inner and outer hollow shafts, the inner and outer passages being in fluid communication with each other;a motor end connectable to a motor for rotating the shaft assembly;a joint end connectable to a rotary joint, the joint end having a fluid inlet and a fluid outlet, each communicating with a respective one of the inner and outer passages; anda plurality of blades extending from the outer hollow shaft in the stationary chamber, for mixing the material, the blades being respectively formed from at least one solid plate provided, the at least one plate having one or more channels extending within the solid plate, said at least one plate comprising opposed first and second lateral faces, said lateral faces being substantially planar, each blade comprising a channel inlet communicating with one of the passages, and a channel outlet communicating with the other one of the passages; wherein the K-mixer is adapted for operating at speeds greater than 400 RPM and wherein the inner passage, the channels and the outer passage form a continuous flow path allowing a pressurized fluid to circulate within inner and outer hollow shafts and through the plurality of blades, from the fluid inlet to the fluid outlet, for controlling a temperature of the shafts and a temperature of the blades, allowing a flow of the fluid in the blades in an opposite direction of a rotational direction of the shaft assembly. 30. The temperature-controlled K-mixer according to claim 29, wherein at least one of the blades is twisted longitudinally.
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