Flowmeter having an impeller with a carrier body having a radial opening to a central boring

• US 6,311,569 B1
• Filed: 12/08/1998
• Issued: 11/06/2001
• Est. Priority Date: 05/23/1997
• Status: Expired due to Term

• Current Assignee: Wellspring Wireless Incorporated
• Original Assignee: Siebert & KUHN GmbH & Company KG
• Inventors: Siebert, Christian, Trinter, Frank
• Primary Examiner(s): Fuller, Benjamin R.
• Assistant Examiner(s): Mack, Corey D.
• Application Number:
  US09/207,131
• Time in Patent Office: 1,064 Days
• Field of Search: 738/617.5, 738/617.7, 738/617.8, 738/617.9, 738/618.3, 738/619.1, 738/619.2, 738/618.9, 298/89
• US Class Current: 73/861.79
• CPC Class Codes: G01F 1/10 using rotating vanes with axial admission
• CPC Class Codes: G01F 1/115 with magnetic or electromagnetic coupling to the indicating device
• CPC Class Codes: G01F 15/00 Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus

Abstract

The device is used to determine the flow rate of a medium, e.g. of a fluid or a gas, including a housing (1) with a chamber (2) through which the medium is axially flowing and which receives an impeller wheel (10) with one blade (13), whereas the impeller wheel (10) is provided with a carrier body (12) having a centrical boring (15) for receiving an axle (11), whereas the carrier body (12) is provided in the area of the axle (11) with at least one opening (12a) running radially to the centrical boring in the carrier body (12), whereas the axle (11) is arranged in the carrier body (12) by at least one, preferably two radial bearings (17, 18), whereas a radial allowance is provided between the boring of the carrier body (12) and the axle (11), whereas, due to the radial allowance between boring (15) in the carrier body (12) and axle (11), water is entering at the open side of the boring (15) and is exiting through the radially running opening (12a) in the carrier body (12).

Claims

1. Device which is used to determine the flow rate of a fluid including a housing (1) with a chamber (2) through which the fluid flows in an axial direction (as indicated by arrow 50) and which receives an impeller wheel (10) with one blade (13), the impeller wheel (10) being provided with a carrier body (12) having a central boring (15) for receiving an axle (11), the carrier body (12) being provided with at least one radially extending opening (12a) extending between the axle in the central boring (15) and the chamber (2),

characterized in that a perforated disc (21) is mounted in one end of the chamber (2) and the axle (11) viewing the chamber (2) in the direction of the flow of the fluid (arrow 50), is mounted in at least one bearing (17 or 18) in the carrier body (12), and a radial space allowance is provided between the boring (15) of the carrier body (12) and the axle (11) into which fluid enters through the at least one bearing (17 or 18) into the boring (15) on account of the radial space allowance between the boring (15) in the carrier body (12) and the axle (11) and exits through the at least one radially extending opening (12a) in the carrier body (12).

2. Device according to claim 1,

characterized in that an axle-bearing (19) is provided in the carrier body (12) for receiving the axle (11).

3. Device according to claim 1,

characterized in that the blade (13) is curved or arcuate and extends skew to an elongate axis of the axle.

4. Device according to claim 3,

characterized in that the carrier body has an outer periphery and two curved or arcuate blades (13) are fixed to and extend about the periphery of the carrier body (12).

5. Device according to claim 4,

characterized in that, viewing the chamber 2 in the direction of the flow (arrow 50) of the fluid, the crossing point of the blades (13) of impeller wheel (10) is spaced (arrow 80) from an axle-bearing (19) in the carrier body (12).

6. Device according to claim 3,

characterized in that the blade (13) extends over a major part of the length of the carrier body (12).

7. Device according to claim 3,

characterized in that the blade (13) is located at an angle of incidence with respect to an outer periphery of the carrier body of approximately 45°

.

8. Device according to claim 2,

characterized in that the carrier body (12) is provided, viewing the device in direction of flow (arrow 50), with at least one pulse giver (60) in front of the axle-bearing, the pulse giver cooperating with a pulse receiver (70) received on or in the housing (1) to determine the resolutions/min. of the impeller wheel (10).

9. Device according to claim 1,

characterized in that the carrier body (12) extends axially over the blade (13) mounted on the carrier body (12).

10. Device according to claim 1,

characterized in that, viewing the chamber (2) in the direction of the flow of the fluid, a front perforated disk (31) is positioned in front of the carrier body (12) to equalize or align the flow of fluid in the chamber (2).

11. Device according to claim 10,

characterized in that the front perforated disk (31) is provided with a gudgeon-like projection (35) facing the carrier body (12) and restricting the axial play of the carrier body (12) on the axle (11).

12. Device according to claim 1,

characterized in that, viewing the device in direction of the flow (arrow 50), a rear perforated disk is positioned behind the carrier body (12).

13. Device according to claim 12,

characterized in that the axle (11) for carrier body (12) is centrically located in the rear perforated disk (21).

14. Device according to claim 1,

characterized in that the carrier body (12) is generally cylindrical in shape.