Feed unit

Patent metadata

Field	Value
Publication number	US-9422935-B2
Application number	US-201214352888-A
Country	US
Kind code	B2
Filing date	Oct 16, 2012
Priority date	Oct 19, 2011
Publication date	Aug 23, 2016
Grant date	Aug 23, 2016

Abstract

A feed unit comprising a first toothing part ( 1 ) and a second toothing part ( 2 ) which interact with one another via a toothing system ( 1.1, 2.1 ) and axes ( 1.2, 2.2 ) of which are set obliquely with respect to one another, the first toothing part ( 1 ) engaging around the second toothing part ( 2 ) with a collar section ( 8 ), and working spaces ( 3 ) being formed between the toothing system ( 1.1 ) of the first toothing part ( 1 ) and the toothing system ( 2.1 ) of the second toothing part ( 2 ), which working spaces ( 3 ) are configured to be filled via an inflow ( 4 ) and are configured to be emptied via an outflow ( 5 ).

First claim

The invention claimed is:

1. A feed unit comprising: a first toothing part ( 1 ) and a second toothing part ( 2 ) which interact with one another via a toothing system ( 1 . 1 , 2 . 1 ) and axes ( 1 . 2 , 2 . 2 ) of which are set obliquely with respect to one another, the first toothing part ( 1 ) engaging around the second toothing part ( 2 ) with a collar section ( 8 ), and working spaces ( 3 ) being formed between the toothing system ( 1 . 1 ) of the first toothing part ( 1 ) and the toothing system ( 2 . 1 ) of the second toothing part ( 2 ), which working spaces ( 3 ) are configured to be filled via an inflow ( 4 ) and are configured to be emptied via an outflow ( 5 ), wherein the collar section ( 8 ) of the first toothing part ( 1 ) has at least one first recess ( 9 ) for filling or emptying the respective working space ( 3 ), the second toothing part ( 2 ) having, on a circumference which faces the first toothing part ( 1 ), at least one second recess ( 10 ) which opens into one of the working spaces ( 3 ), the first recess ( 9 ) and the second recess ( 10 ) forming a flow connection into a respective working space ( 3 ) when overlapped.

2. The feed unit as claimed in claim 1 , wherein the second recess ( 10 ) of the second toothing part ( 2 ) is provided between two tooth tips as viewed in a circumferential direction.

3. The feed unit as claimed in claim 1 , wherein the second recess ( 10 ) of the second toothing part ( 2 ) is configured as a groove-shaped depression or as a channel.

4. The feed unit as claimed in claim 1 , wherein one of the first toothing part and the second toothing part ( 2 ) has a spherical section ( 12 ) and the other of the first toothing part ( 1 ) and the second toothing part has a hollow spherical section ( 13 ) for support on the spherical section ( 12 ).

5. The feed unit as claimed in claim 4 , wherein the second toothing part ( 2 ) has at least one connecting channel ( 14 ) which, as viewed in an axial direction, runs, starting from a side which faces away from the spherical section ( 12 ), as far as the spherical section ( 12 ), control grooves ( 15 ) being provided on the hollow spherical section ( 13 ) of the first toothing part ( 1 ), which control grooves ( 15 ) form a flow connection into the respective working space ( 3 ) via an overlap with the at least one connecting channel ( 14 ) of the second toothing part ( 2 ).

6. The feed unit as claimed in claim 4 , wherein the first toothing part ( 1 ) has at least one connecting channel ( 14 ) which, as viewed in an axial direction, runs, starting from a side which faces away from the hollow spherical section ( 13 ), as far as the hollow spherical section ( 13 ), control grooves ( 15 ) being provided on the spherical section ( 12 ) of the second toothing part ( 2 ), which control grooves ( 15 ) form a flow connection into the respective working space ( 3 ) via an overlap with the at least one connecting channel ( 14 ) of the first toothing part ( 1 ).

7. The feed unit as claimed in claim 5 , wherein the control grooves ( 15 ) are of finger-shaped, kidney-shaped, boomerang-shaped, helical, L-shaped, S-shaped, V-shaped or star-shaped configuration in a direction of their longitudinal extent.

8. The feed unit as claimed in claim 1 , wherein the second toothing part ( 2 ) has one control channel ( 28 ) between two tooth tips as viewed in a circumferential direction, which control channel ( 28 ) leads from a side which faces the working space ( 3 ) to a side which faces away from the working space ( 3 ), each control channel ( 28 ) being assigned a valve element ( 29 ) which can open or close the control channel ( 28 ).

9. The feed unit as claimed in claim 1 , wherein the first toothing part ( 1 ) is a rotor and the second toothing part ( 2 ) is a counter-rotor or a stator.

10. The feed unit as claimed in claim 1 , wherein the feed unit is a pump or a compressor.

11. The feed unit as claimed in claim 2 , wherein the second recess ( 10 ) of the second toothing part ( 2 ) is configured as a groove-shaped depression or as a channel.

12. The feed unit as claimed in claim 11 , wherein one of the first toothing part and the second toothing part ( 2 ) has a spherical section ( 12 ) and the other of the first toothing part ( 1 ) and the second toothing part has a hollow spherical section ( 13 ) for support on the spherical section ( 12 ).

13. The feed unit as claimed in claim 12 , wherein the second toothing part ( 2 ) has at least one connecting channel ( 14 ) which, as viewed in an axial direction, runs, starting from a side which faces away from the spherical section ( 12 ), as far as the spherical section ( 12 ), control grooves ( 15 ) being provided on the hollow spherical section ( 13 ) of the first toothing part ( 1 ), which control grooves ( 15 ) form a flow connection into the respective working space ( 3 ) in the case of an overlap with the at least one connecting channel ( 14 ) of the second toothing part ( 2 ).

14. The feed unit as claimed in claim 12 , wherein the first toothing part ( 1 ) has at least one connecting channel ( 14 ) which, as viewed in an axial direction, runs, starting from a side which faces away from the hollow spherical section ( 13 ), as far as the hollow spherical section ( 13 ), control grooves ( 15 ) being provided on the spherical section ( 12 ) of the second toothing part ( 2 ), which control grooves ( 15 ) form a flow connection into the respective working space ( 3 ) in the case of an overlap with the at least one connecting channel ( 14 ) of the first toothing part ( 1 ).

15. The feed unit as claimed in claim 14 , wherein the control grooves ( 15 ) are of finger-shaped, kidney-shaped, boomerang-shaped, helical, L-shaped, S-shaped, V-shaped or star-shaped configuration in a direction of their longitudinal extent.

16. The feed unit as claimed in claim 15 , wherein the second toothing part ( 2 ) has one control channel ( 28 ) between two tooth tips as viewed in a circumferential direction, which control channel ( 28 ) leads from a side which faces the working space ( 3 ) to a side which faces away from the working space ( 3 ), each control channel ( 28 ) being assigned a valve element ( 29 ) which can open or close the control channel ( 28 ).

17. The feed unit as claimed in claim 16 , wherein the first toothing part ( 1 ) is a rotor and the second toothing part ( 2 ) is a counter-rotor or a stator.

18. The feed unit as claimed in claim 17 , wherein the feed unit is a pump or a compressor.

Assignees

• Bosch Gmbh Robert

Inventors

• Nowitzky Ingo
• Amesoeder Dieter
• Laforsch Oliver
• Kunath Sando
• Skrynski Evgenij
• Kacmar Marian

Classifications

• F04C3/08 Primary

  of intermeshing engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing · CPC title

• F04C2/084

  Toothed wheels · CPC title

• F04C18/084 Primary

  Toothed wheels · CPC title

• F04C15/06

  Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet · CPC title