Hydrodynamic machine and dynamic pressure pump therefor

Patent metadata

Field	Value
Publication number	US-10077814-B2
Application number	US-201515123785-A
Country	US
Kind code	B2
Filing date	Mar 2, 2015
Priority date	Mar 3, 2014
Publication date	Sep 18, 2018
Grant date	Sep 18, 2018

Abstract

A hydrodynamic machine contains a bladed primary wheel driven by a rotary shaft and a bladed secondary wheel, which together form a work chamber filled with a working medium. The machine has a pressure pump for delivering a working medium from the work chamber. The pressure pump has a first inlet, which projects into the work chamber, and has a first inlet opening which is aligned with the rotary shaft in the circumferential direction. The pressure pump has a second inlet which projects into the work chamber and has a second inlet opening which is aligned to the rotary shaft in the circumferential direction opposite to the first inlet opening. The first and second inlets are joined to a common working medium channel behind the two inlet openings. The first and second inlets extend adjacent to each other in the same flow direction separated by a separation wall.

First claim

The invention claimed is:

1. A hydrodynamic machine, comprising:
a bladed primary wheel driven around an axis of rotation;
a bladed secondary wheel which together with said bladed primary wheel form a work chamber to be filled with a working medium;
a secondary chamber fluidically connected to said work chamber;
a dynamic pressure pump for at least indirectly discharging the working medium from said work chamber or from the hydrodynamic machine, said dynamic pressure pump having a dividing wall, a first working medium inlet projecting into said work chamber or said secondary chamber, and a first inlet opening aligned in a circumferential direction with respect to the axis of rotation, said dynamic pressure pump further having a second working medium inlet projecting into said work chamber or into said secondary chamber connected to said work chamber in a manner which allows transmission of the working medium, and a second inlet opening aligned oppositely to said first inlet opening in the circumferential direction with respect to the axis of rotation;
said first working medium inlet and said second working medium inlet are joined in a manner which allows transmission of the working medium and form a common working medium channel after said first and second inlet openings; and
ahead of said common working medium channel as seen in a flow direction of the working medium, said first working medium inlet and said second working medium inlet extend adjacent to each other in a same direction and are separated by said dividing wall.

2. The hydrodynamic machine according to claim 1 , wherein said first and second working medium inlets have a free, invariable flow cross section at least from said first and second inlet openings respectively thereof to said common working medium channel or to an end of said common working medium channel remote from said first and second inlet openings.

3. The hydrodynamic machine according to claim 1 , wherein starting from said first and second inlet openings, respectively, said first working medium inlet and said second working medium inlet initially extend toward one another and then in each case in an arc in a common direction.

4. The hydrodynamic machine according to claim 3 , further comprising a common deflector, said two arcs are followed in the flow direction of the working medium by said common deflector with an angle of 70° to 110°.

5. The hydrodynamic machine according to claim 4 , wherein said dividing wall reaches into said deflector or as far as a rear end of said deflector as seen in the flow direction of the working medium and is then followed by said common working medium channel, which extends in a direction of the axis of rotation or parallel thereto.

6. The hydrodynamic machine according to claim 1 , wherein said common working medium channel has a working medium transmission length which is a multiple of a working medium transmission length in each case from one of said first and second inlet openings to said common working medium channel.

7. The hydrodynamic machine according to claim 1 , wherein said common working medium channel has a diffuser.

8. The hydrodynamic machine according to claim 1 ,
wherein the hydrodynamic machine is embodied as a hydrodynamic coupling;
wherein said bladed secondary wheel can be driven by said bladed primary wheel around the axis of rotation by means of working medium circulation in said work chamber; and
further comprising a storage chamber for the working medium that is not in said work chamber, said storage chamber being connected to said dynamic pressure pump in such a way that said dynamic pressure pump delivers the working medium discharged at least indirectly from said work chamber into said storage chamber, wherein said storage chamber is likewise disposed so as to revolve with respect to the axis of rotation or to be stationary.

9. The hydrodynamic machine according to claim 1 , wherein said first and second working medium inlets of said dynamic pressure pump are held stationary or revolve around the axis of rotation through being driven by said dynamic pressure pump.

10. A dynamic pressure pump, comprising:
a first working medium inlet having a first inlet opening;
a second working medium inlet having a second inlet opening, said first inlet opening and said second inlet opening are aligned oppositely to one another and said first working medium inlet and said second working medium inlet are joined in a manner which allows transmission of a working medium and form a common working medium channel after said first and second inlet openings; and
a dividing wall, ahead of said common working medium channel as seen in a flow direction of the working medium, said first working medium inlet and said second working medium inlet extend adjacent to each other in a same direction and are separated by said dividing wall.

11. The dynamic pressure pump according to claim 10 , wherein said first and second working medium inlets have a free, invariable flow cross section at least from said first and second inlet openings thereof to said common working medium channel or to an end of said common working medium channel remote from said first and second inlet openings.

12. The dynamic pressure pump according to claim 10 , wherein starting from said first and second inlet openings, said first working medium inlet and said second working medium inlet respectfully initially extend toward one another and then each extend in an arc in a common direction.

13. The dynamic pressure pump according to claim 12 , further comprising a common deflector, said two arcs are followed in the flow direction of the working medium by said common deflector with an angle of 70° to 110°.

14. The dynamic pressure pump according to claim 13 , wherein said dividing wall reaches into said deflector or as far as a rear end of said deflector as seen in the flow direction of the working medium and is then followed by said common working medium channel, which, extends in a direction of the axis of rotation or parallel thereto.

15. The dynamic pressure pump according to claim 10 , wherein said common working medium channel has a working medium transmission length which is a multiple of a working medium transmission length in each case from one of said first and second inlet openings to said common working medium channel.

16. The dynamic pressure pump according to claim 10 , wherein said common working medium channel has a diffuser.

17. The dynamic pressure pump according to claim 12 , further comprising a common deflector, said two arcs are followed in the flow direction of the working medium by said common deflector with an angle of 80° to 100°.

18. The dynamic pressure pump according to claim 12 , further comprising a common deflector, said two arcs are followed in the flow direction of the working medium by said common deflector with an angle of 90°.

19. The dynamic pressure pump according to claim 15 , wherein the multiple is at least three times the working medium transmission length.

20. The dynamic pressure pump according to claim 15 , wherein the multiple is ten times the working medium transmission length.

Assignees

• Voith Patent Gmbh

Inventors

• Vogel Thomas
• Schips Rainer

Classifications

• F04D29/4293

  Details of fluid inlet or outlet · CPC title

• F04D29/22

  specially for centrifugal pumps · CPC title

• F16D33/06

  controlled by changing the amount of liquid in the working circuit · CPC title

• F04D29/445

  especially adapted for liquid pumps · CPC title

• F16D33/18

  Details (applicable also to fluid gearing F16H41/24) · CPC title