Granted Patent B2

US 12,228,228 · App. 18/388,125 · Granted Feb 18, 2025

Inventor: Manuel Schöferle (Ulm, DE)

Assignee: Christian Maier GmbH & Co KG, Maschinenfabrik

F16L27/082

Abstract

Claims (18)

1. A rotary joint comprising:

a stator and a rotor, each having at least one fluid channel;

a fluid transfer interface between the stator and the rotor, via which a fluid flows from the fluid channel in the stator into the fluid channel in the rotor, or vice versa, wherein the fluid transfer interface is sealed off using a mechanical seal, which comprises an abrasive sliding ring, and the sliding ring bears in an axial direction in an elastically biased manner against at least one mating ring and forms a seal face therewith;

wherein an axial displacement detection device is provided, which is designed to detect, in the event of wear on the sliding ring, an associated axial displacement of the stator and/or rotor;

wherein the axial displacement detection device comprises a rotary encoder on the rotor and a sensor that detects a position of the rotary encoder, said sensor being located radially opposite the rotary encoder, and the rotary encoder comprises at least one discrete marker or a plurality of discrete markers arranged at intervals one after the other in the circumferential direction, said markers being arranged on the rotor, and the at least one discrete marker varies along the axial direction in its extent in the circumferential direction, and/or different numbers of individual discrete markers are provided, one after the other in the circumferential direction, in different axial sections of the rotor.

2. The rotary joint according to claim 1 , wherein the position of the sensor and/or of the at least one rotary encoder is adjustable in the radial direction and/or axial direction.

3. The rotary joint according to claim 2 , wherein the rotary encoder extends only over part of the circumference.

4. The rotary joint according to claim 2 , wherein the rotary encoder extends only over part of the circumference less than 45° or less than 10°.

5. The rotary joint according to claim 1 , wherein the rotary encoder extends only over part of the circumference.

6. The rotary joint according to claim 1 , wherein the stator comprises a housing having at least one fluid inlet and/or fluid outlet, and the sensor is borne by a support element connected to the housing.

7. The rotary joint according to claim 6 , wherein the support element comprises a sheet-metal strip that bears the sensor.

8. The rotary joint according to claim 1 , wherein the rotary encoder is formed by an angled plate connected to the rotor.

9. The rotary joint according to claim 1 , wherein a control device is provided, which processes signals that are generated by the sensor as a function of the current circumferential position of the at least one marker, wherein the control device and/or the sensor generates a sequence of on/off signals.

10. The rotary joint according to claim 1 , wherein a radial gap between the rotary encoder and the sensor is at least 1 or 2 mm.

11. The rotary joint according to claim 1 , wherein the sliding ring forms, on each of its two opposite end faces, a seal face with a respective mating ring and is rotatable in the circumferential direction relative to both mating rings.

12. The rotary joint according to claim 1 , wherein the at least one discrete marker has a triangular shape.

13. The rotary joint according to claim 1 , wherein the rotary encoder extends only over part of the circumference less than 45° or less than 10°.

14. The rotary joint according to claim 1 , wherein a radial gap between the rotary encoder and the sensor is at least 5 mm.

Assignments (1)

Priority Claims (1)

Continuity (1)

References Cited (11)