Double cone for generation of a pressure difference

• US 20060140780A1
• Filed: 06/20/2003
• Published: 06/29/2006
• Est. Priority Date: 06/20/2003
• Status: Abandoned Application

• Current Assignee: DCT Double-Cone Technology AG
• Original Assignee: DCT Double-Cone Technology AG
• Inventors: Stark, John
• Application Number:
  US10/561,317
• Publication Number:
  US 20060140780A1
• Time in Patent Office: Days
• US Class Current: 417/198
• CPC Class Codes: F04F 5/44 Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
• CPC Class Codes: F04F 5/46 Arrangements of nozzles
• CPC Class Codes: F04F 5/466 with a plurality of nozzles arranged in parallel

Abstract

The present invention deals with a double-cone device that produces enhanced suction, pressure amplification and reduced noise. The enhancement is achieved is by using a continuous geometry for the two frustroconical sections of the double-cone device. Further, a plurality of holes on the exit cone is used to suck the material into the device. Continuous geometry results in a stable flow profile that leads to reduced noise and enhanced amplification. Holes increase the suction force since they can be placed very close to the orifice. Further enhancements are also achieved by choosing the appropriate range of entry cone and exit cone angles.

Claims

1. A double-cone device of continuous geometry for creating a pressure difference in a fluid flowing through the device, the device comprising:

a. a first tapering section of essentially hollow frustroconical shape; and

b. a second diverging section of essentially hollow frustroconical shape,

wherein the section of minimum diameter of the device is an orifice of the device,

wherein the second diverging section has a plurality of holes on its surface beyond the orifice in order to achieve suction.

2. The device according to claim 1, wherein conical angle of the first tapering section is greater than 0°

and at most 10°

, preferably at most 5°

.

3. The device according to claim 1, wherein conical angle of the second diverging section is greater than 0°

and at most 10°

, preferably at most 4°

.

4. The device according to claim 1, wherein the holes are of circular shape.

5. The device according to claim 1, wherein the holes are inclined in the direction of the flow of the fluid.

6. The device according to claim 1, wherein the holes have diameter that is less than half the diameter of the orifice section.

7. The device according to claim 1, wherein the holes are made at the orifice.

8. The device according to claim 1, wherein the holes are made on a portion of the second diverging section with diameter greater than the diameter of the orifice and less than 1.5 times the diameter of the orifice.

9. A double-cone device of continuous geometry for creating a pressure difference in a fluid flowing through the device, the device comprising:

a. a first tapering section of essentially hollow frustroconical shape;

b. a second porous diverging section of essentially hollow frustroconical shape to achieve suction; and

c. a third diverging section of essentially hollow frustroconical shape, extending from the end of the porous section.

10. The device according to claim 9, wherein conical angle of the first tapering section is greater than 0°

and at most 10°

, preferably at most 5°

.

11. The device according to claim 9, wherein conical angle of the third diverging section is greater than 0°

and at most 10°

, preferably at most 4°

.

12. The device according to claim 9, wherein the porous section has larger diameter greater than smaller diameter of the first tapering section and less than 1.5 times the smaller diameter of the first tapering section.

13. A double-cone device for creating a pressure difference in a fluid flowing through the device, the device comprising:

a. a first tapering section of essentially hollow frustroconical shape;

b. a second diverging section of essentially hollow frustroconical shape; and

c. an insert section having a central hollow frustroconical portion, the hollow portion having the smaller diameter end matched to the smaller diameter end of the first tapering section and the larger diameter end matched to the smaller diameter end of the second diverging section, the insert extending from the smaller diameter end of first tapering section to the beginning of the second diverging section, wherein the insert section has a plurality of radial holes on the central hollow portion to facilitate suction.

14. The device according to claim 13, wherein conical angle of the first tapering section is greater than 0°

and at most 10°

.

15. The device according to claim 13, wherein conical angle of the second diverging section is greater than 0°

and at most 10°

, preferably at most 2°

.