SPINDLE AND INTERIOR COOLING CIRCUIT MODULE

Abstract

A spindle and interior cooling circuit module for delivery cryogenic fluids. The spindle has an interior coaxially equipped with a mandrel and a drawbar. The drawbar has an interior coaxially equipped with a small diameter tube. An insulated layer coated between the interior wall of drawbar and the exterior wall of insulated layer. The insulated layer, made of thermal insulation material, lowers the thermal transmission effect between the small diameter tube and the drawbar of a spindle when the cryogenic fluids is delivering.

Claims

1. A spindle, comprises a mandrel, and a drawbar coaxially equipped in said mandrel, characterized in that said drawbar having an interior cooling circuit module for delivery cryogenic fluids; said interior cooling circuit module comprises a small diameter tube coaxially installing in said drawbar, a tangible insulated layer filled between an interior wall of said drawbar and an exterior wall of said small diameter tube; wherein the tangible insulated layer is pre-coated on the exterior wall of the small diameter tube.

2. The spindle of claim 1, wherein the material of said tangible insulated layer is selected from heat shrinkable joint closure, Polyvinyl chloride(PVC), Polytetrafluoroethylene(PTFE), Halogen-free flame retardant heat-shrinkable tube(RSFR), Silica gel, Styrofoam, or rubber.

3. (canceled)

4. (canceled)

5. The spindle of claim 1, wherein the tangible insulated layer is made of porous material or heat reflective material.

6. (canceled)

7. (canceled)

8. An interior cooling circuit module for delivery cryogenic fluids through a spindle comprises a drawbar inside of the spindle, a small diameter tube coaxially installed inside of the drawbar, and a tangible insulated layer filled between the interior wall of drawbar and the exterior wall of the small diameter tube; wherein the tangible insulated layer is pre-coated on the exterior wall of the small diameter tube.

9. The interior cooling circuit module of claim 8, wherein the material of said tangible insulated layer is selected from heat shrinkable joint closure, Polyvinyl chloride(PVC), Polytetrafluoroethylene(PTFE), Halogen-free flame retardant heat-shrinkable tube(RSFR), Silica gel, Styrofoam, or rubber.

10. (canceled)

11. (canceled)

12. The interior cooling circuit module of claim 8, wherein the tangible insulated layer is made of porous material or heat reflective material.

13. (canceled)

14. (canceled)

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0008] FIG. 1 is a schematic view of embodiment to the drawbar and the interior cooling circuit module for delivery cryogenic fluids.

[0009] FIG. 2 is a schematic view of the embodiment.

[0010] FIG. 3 is a partial enlargement of the embodiment.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

[0011] The below-mentioned specifying FIG. 1 the embodiment of present invention to the interior cooling circuit module for delivery cryogenic fluids. Said module 20 is installed in drawbar 10. Said drawbar is coaxially equipped in the interior of mandrel M of the machine spindle 1.

[0012] The interior cooling circuit module 20 is composed by small diameter tube 21 and the tangible insulated layer 22. In which the small diameter tube is coaxially installed in the drawbar 10. Therefore, the space between small diameter tube 21 and the drawbar 10 forms cylindrical. Said tangible insulated layer 22 fill up the cylindrical space between the exterior wall of small diameter tube 21 and the interior wall of drawbar 10.

[0013] The tangible insulated layer 22 made of thermal insulation material with the characteristic of lower transmission conductivity can be chosen from heat-shrinkable joint closure, Polyvinyl chloride(PVC), Polytetrafluoroethylene(PTFE), Halogen-free flame retardant heat-shrinkable tube(RSFR), Silica gel, Styrofoam, rubber . . . etc., or the other porous or heat reflection alternations such as foamed plastics, glass fiber cotton . . . etc.

[0014] Considering practical purpose for manufacturing, the tangible insulated layer 22 can be pre-coated on the exterior wall of small diameter tube before installing in the interior of drawbar 10. Furthermore, the way for insulation can change coating for filling. Therefore, the passage of interior of small diameter tube 21 delivers the cryogenic fluids, and the tangible insulated layer for better insulation lowers not only the thermal transmission effect between drawbar and small diameter tube, but also the damage possibility of spindle.