Temperature-monitored hydrodynamic machine

• US 7,254,942 B2
• Filed: 02/07/2005
• Issued: 08/14/2007
• Est. Priority Date: 02/09/2004
• Status: Active Grant

• Current Assignee: Voith Patent Gmbh
• Original Assignee: Voith Turbo GmbH & Company KG (Voith GmbH)
• Inventors: Hoffeld, Harald, Adleff, Kurt, Frank, Anton
• Primary Examiner(s): LOPEZ, FRANK D
• Application Number:
  US11/052,681
• Publication Number:
  US 20050198948A1
• Time in Patent Office: 918 Days
• Field of Search: 603/47
• US Class Current: 60/347
• CPC Class Codes: F16D 33/00 Rotary fluid couplings or clutches of the hydrokinetic type
• CPC Class Codes: G01K 13/08 in rotary movement
• CPC Class Codes: G01K 7/32 using change of resonant frequency of a crystal

Abstract

A hydrodynamic machine with a turbo coupling comprising primary and secondary wheels together forming a torus shaped workspace, which can be filled with a working medium. A temperature-sensing device installed in a component, which rotates when the machine is operating, and sending a temperature —dependant signal. A stationary monitoring device connected to the temperature sensor in a remote query connection, and having means for creating a temperature measurement correction depending on the heating rate progression of the sensed temperature.

Claims

1. A hydrodynamic machine with a turbo coupling, comprising:

a primary wheel;

a secondary wheel;

the primary wheel and the secondary wheel together forming a torus-shaped workspace which can be filled with a working medium;

a temperature sensing device installed in a component that rotates when the machine is in operation and sends a temperature-dependent signal to a monitoring device that is connected with the temperature sensing device in a remote query connection and which is assigned to the hydrodynamic machine;

the signal comprising information for determining the absolute temperature of the working medium and/or a predetermined reference point in the rotating component;

the monitoring device having a means for creating a temperature measurement correction depending on the heating rate progression of the sensed temperature.

2. The hydrodynamic machine in accordance with claim 1, wherein the temperature sensing device comprises a remotely readable surface-wave component.

3. The hydrodynamic machine in accordance with claim 2, wherein the surface-wave component is radio readable and is only supplied with power by query radio signals.

4. The hydrodynamic machine in accordance with claim 3, wherein the surface-wave component comprises a sensor of one of the following structure:

reflective delay line

SAW resonator

dispersive SAW structure

passive, non-piezoelectric transponder.

5. The hydrodynamic machine in accordance with claim 3 wherein the temperature sensing device is arranged in the shell and/or on the outer wheel side of the primary wheel or the secondary wheel axially mainly in the area of the largest diameter of the hydrodynamic machine.

6. The hydrodynamic machine in accordance with claim 2, wherein the surface-wave component comprises a sensor of one of the following structure:

reflective delay line

SAW resonator

dispersive SAW structure

passive, non-piezoelectric transponder.

7. The hydrodynamic machine in accordance with claim 6 characterized in that wherein the temperature sensing device is arranged in the shell and/or on the outer wheel side of the primary wheel or the secondary wheel axially mainly in the area of the largest diameter of the hydrodynamic machine.

8. The hydrodynamic machine in accordance with claim 2, wherein the temperature sensing device is arranged in the shell and/or on the outer wheel side of the primary wheel or the secondary wheel axially mainly in the area of the largest diameter of the hydrodynamic machine.

9. The hydrodynamic machine in accordance with claim 1, wherein the temperature sensing device is arranged in the shell and/or on the outer wheel side of the primary wheel or the secondary wheel axially mainly in the area of the largest diameter of the hydrodynamic machine.

10. A method for determining the temperature of the working medium or a reference point in a rotating component of a hydrodynamic machine with a turbo coupling, in accordance with claim 1, comprising the following steps:

the temperature sensing device is activated for the output of signals that are temperature-dependent by means of a remote query; and

the temperature-dependent signals are analyzed and the temperature to be determined is identified from this as an absolute value, wherein a correction is applied depending on the heating rate.

11. The method in accordance with claim 10, wherein the determined heating rate is multiplied by a predetermined constant, which depends on the thermal inertness of the temperature recording device, and the result of this multiplication is added to the measured temperature as the correction supplement.

12. The method in accordance with claim 11, wherein the temperature determination is executed continuously with a pulse frequency of one second or less.

13. A hydrodynamic machine with a turbo coupling, comprising:

a primary wheel;

a secondary wheel;

the primary wheel and the secondary wheel together form a torus-shaped workspace which can be filled with a working medium;

a temperature sensing device installed in a component that rotates when the machine is in operation and sends a temperature-dependent signal;

the signal comprising information for determining the absolute temperature of the working medium and/or a predetermined reference point in the rotating component; and

a stationary monitoring device assigned to the hydrodynamic machine and that is connected with the temperature sensing device in a remote query connection.

14. A hydrodynamic machine in accordance with claim 13, wherein the temperature sensing device comprises a remotely readable surface-wave component.

15. A hydrodynamic machine in accordance with claim 13, wherein the surface-wave component is radio readable and is only supplied with power by query radio signals.

16. A hydrodynamic machine in accordance with claim 13, wherein the surface-wave component comprises a sensor of one of the following structure:

reflective delay line

SAW resonator

dispersive SAW structure

passive, non-piezoelectric transponder.

17. A hydrodynamic machine in accordance with claim 13, wherein the temperature sensing device is arranged in the shell and/or on the outer wheel side of the primary wheel or the secondary wheel axially mainly in the area of the largest diameter of the hydrodynamic machine.

18. A method for determining the temperature of the working medium or a reference point in a rotating component of a hydrodynamic machine with a turbo coupling, in accordance with claim 13, comprising the following steps:

the temperature sensing device is activated for the output of signals that are temperature-dependent by means of a remote query; and

the temperature dependent signals are analyzed and the temperature to be determined is identified from this as an absolute value, by the stationary monitoring device.

19. A method in accordance with claim 18, wherein a correction is applied to the absolute value of the determined temperature, depending on the heating rate;

wherein the determined heating rate is multiplied by a predetermined constant, which depends on the thermal inertness of the temperature sensing device, and the result of this multiplication is added to the measured temperature as the correction supplement.

20. The method in accordance with claim 18, wherein the temperature determination is executed continuously with a pulse frequency of one second or less.