Sealing array for a transmission, in particular for the output shaft of a transmission, and transmission having the sealing array

Patent metadata

Field	Value
Publication number	US-10634232-B2
Application number	US-201515546233-A
Country	US
Kind code	B2
Filing date	Dec 1, 2015
Priority date	Jan 26, 2015
Publication date	Apr 28, 2020
Grant date	Apr 28, 2020

Abstract

In a sealing array for a transmission, in particular for the output shaft of a transmission, and a transmission having a sealing array, a spacer ring is situated between a first and a second shaft-sealing ring, a flange part is connected to the coupling flange, in particular by screws, and a coupling flange presses the second shaft-sealing ring against the spacer ring, the spacer ring presses on the first shaft-sealing ring so that the first shaft-sealing ring is positioned against a flange part. The flange part, the coupling flange, the first shaft-sealing ring, the spacer ring, and the second shaft-sealing ring are arranged as a pre-assembled unit, and thus, in particular, as a transportable, integrated unit.

First claim

The invention claimed is:

1. A sealing array for a transmission, comprising:
a first shaft-sealing ring;
a second shaft sealing ring;
a spacer ring arranged between the first shaft-sealing ring and the second shaft-sealing ring;
a flange part;
a coupling flange screw-connected to the flange part and pressing the second shaft-sealing ring against the spacer ring to press the spacer ring against the first shaft-sealing ring and the first shaft-sealing ring against the flange part.

2. The sealing array according to claim 1 , wherein the flange part, the coupling flange, the first shaft-sealing ring, the spacer ring, and the second shaft-sealing ring are arranged as a pre-assembled unit.

3. The sealing array according to claim 2 , wherein the pre-assembled unit is arranged as a transportable and integrated unit.

4. The sealing array according to claim 1 , wherein the sealing array is arranged as a sealing array for an output shaft of the transmission.

5. A sealing array for a transmission, comprising:
a first shaft-sealing ring;
a second shaft sealing ring;
a spacer ring arranged between the first shaft-sealing ring and the second shaft-sealing ring;
a flange part; and
a coupling flange screw-connected to the flange part and pressing the second shaft-sealing ring against the spacer ring to press the spacer ring against the first shaft-sealing ring and the first shaft-sealing ring against the flange part;

wherein the flange part and the coupling flange delimit an annular groove having a first side wall in contact with the first shaft-sealing ring and an opposite side wall in contact with the second shaft-sealing ring.

6. The sealing array according to claim 1 , wherein a contact surface of the first shaft-sealing ring and a contact surface of the second shaft-sealing ring are arranged on a cylinder liner screw-connected to a shaft.

7. The sealing array according to claim 6 , wherein a space region, delimited by the flange part, the coupling flange, the second shaft-sealing ring, the cylinder liner, and/or the shaft, is acted upon by pressurized air.

8. The sealing array according to claim 7 , wherein the coupling flange is adapted to supply the pressurized air therethrough.

9. The sealing array according to claim 6 , wherein the spacer ring has a smaller radial extension than the first shaft-sealing ring and/or the second shaft-sealing ring, the spacer ring being set apart from the cylinder liner and the shaft, to provide a grease chamber between the first shaft-sealing ring and the second shaft-sealing ring.

10. A sealing array for a transmission, comprising:
a first shaft-sealing ring;
a second shaft sealing ring;
a spacer ring arranged between the first shaft-sealing ring and the second shaft-sealing ring;
a flange part; and
a coupling flange screw-connected to the flange part and pressing the second shaft-sealing ring against the spacer ring to press the spacer ring against the first shaft-sealing ring and the first shaft-sealing ring against the flange part;
wherein a contact surface of the first shaft-sealing ring and a contact surface of the second shaft-sealing ring are arranged on a cylinder liner screw-connected to a shaft; and
wherein the cylinder liner is connected to the shaft by axially directed screws.

11. The sealing array according to claim 10 , wherein the axially directed screws are screwed into respective threaded bores provided on an end face of the shaft located at an axial end of the shaft.

12. A sealing array for a transmission, comprising:
a first shaft-sealing ring;
a second shaft sealing ring;
a spacer ring arranged between the first shaft-sealing ring and the second shaft-sealing ring;
a flange part; and
a coupling flange screw-connected to the flange part and pressing the second shaft-sealing ring against the spacer ring to press the spacer ring against the first shaft-sealing ring and the first shaft-sealing ring against the flange part;
wherein a contact surface of the first shaft-sealing ring and a contact surface of the second shaft-sealing ring are arranged on a cylinder liner screw-connected to a shaft; and
wherein the shaft is arranged as a hollow shaft and the coupling flange includes an annular groove, having a ring axis aligned coaxially to a shaft axis of the shaft, an axial end area of the shaft and/or the cylinder liner at least partially projecting into the annular groove.

13. The sealing array according to claim 6 , wherein a cascading sealing array is arranged between the shaft and a cover part, adapted to seal the shaft from a housing of the transmission and to seal an interior of the transmission, that is partially or completely filled with oil, from an external environment.

14. A sealing array for a transmission, comprising:
a first shaft-sealing ring;
a second shaft sealing ring;
a spacer ring arranged between the first shaft-sealing ring and the second shaft-sealing ring;
a flange part; and
a coupling flange screw-connected to the flange part and pressing the second shaft-sealing ring against the spacer ring to press the spacer ring against the first shaft-sealing ring and the first shaft-sealing ring against the flange part;
wherein a contact surface of the first shaft-sealing ring and a contact surface of the second shaft-sealing ring are arranged on a cylinder liner screw-connected to a shaft;
wherein a cascading sealing array is arranged between the shaft and a cover part, adapted to seal the shaft from a housing of the transmission and to seal an interior of the transmission, that is partially or completely filled with oil, from an external environment; and
wherein the cascading sealing array includes a shaft-sealing ring sealing array, a lamellar seal, and a labyrinth seal.

15. A sealing array for a transmission, comprising:
a first shaft-sealing ring;
a second shaft sealing ring;
a spacer ring arranged between the first shaft-sealing ring and the second shaft-sealing ring;
a flange part;
a coupling flange screw-connected to the flange part and pressing the second shaft-sealing ring against the spacer ring to press the spacer ring against the first shaft-sealing ring and the first shaft-sealing ring against the flange part; and
a seal and/or an O-ring arranged between the flange part and the coupling flange adapted to seal a connection of the flange part to the coupling flange.

16. The sealing array according to claim 1 , wherein the flange part is connected to a cover part of the transmission and/or a housing of the transmission.

17. The sealing array according to claim 16 , wherein screw heads of screws of the screw-connection are overlapped and/or covered by the coupling flange.

18. The sealing array according to claim 1 , wherein the shaft-sealing ring sealing array is accommodated in the housing of the transmission.

19. The sealing array according to claim 1 , wherein the coupling flange is screwed to the flange part such that the first shaft-sealing ring and the second shaft-sealing ring are arranged between the coupling flange and the flange part and the spacer ring is situated between the first shaft-sealing ring and the second shaft-sealing ring.

20. The sealing array according to claim 19 , wherein the coupling flange, the flange part, the spacer ring, the first shaft-sealing ring, and the second shaft-sealing ring form a pre-assembled unit.

21. A transmission, comprising:
an output shaft;
a sealing array according to claim 1 adapted to seal the output shaft.

Assignees

• Sew Eurodrive Gmbh & Co

Inventors

• Reineberg Martin
• Barton Peter

Classifications

• F16J15/164

  the sealing action depending on movements; pressure difference, temperature or presence of leaking fluid · CPC title

• F16J15/32

  with elastic sealings, e.g. O-rings · CPC title

• F16H57/029 Primary

  characterised by means for sealing the gearboxes, e.g. to improve airtightness · CPC title

• F16J15/16

  between relatively-moving surfaces (F16J15/50, F16J15/52 take precedence; bellows pistons F16J3/06; piston-rings or ring sealings of similar construction F16J9/00) · CPC title

• F16J15/002 Primary

  comprising at least two sealings in succession (F16J15/162, F16J15/40 take precedence) · CPC title