Pump assembly with charge pump rotor, inversion pump rotor and scavenge pump rotor

Patent metadata

Field	Value
Publication number	US-2017146013-A1
Application number	US-201514949407-A
Country	US
Kind code	A1
Filing date	Nov 23, 2015
Priority date	Nov 23, 2015
Publication date	May 25, 2017
Grant date	—

Abstract

A pump assembly is provided and includes a housing having first, second and third pairs of fluid openings and first, second and third rotary pumps, which are co-rotatable about a common longitudinal axis defined through the housing to drive fluid flow relative to the first, second and third pairs of fluid openings, respectively. The first rotary pump includes an input member receptive of rotational drive energy for the first, second and third rotary pumps.

First claim

What is claimed is:

1 . A pump assembly, comprising:
a housing having first, second and third pairs of fluid openings; and first, second and third rotary pumps, which are co-rotatable about a common longitudinal axis defined through the housing to drive fluid flow relative to the first, second and third pairs of fluid openings, respectively, the first rotary pump comprising an input member receptive of rotational drive energy for the first, second and third rotary pumps.

2 . The pump assembly according to claim 1 , further comprising a drive shaft coupled to the input member.

3 . The pump assembly according to claim 1 , further comprising:
first input and output pipes fluidly connectable to each of the first pair of fluid openings, respectively; second input and output pipes fluidly connectable to each of the second pair of fluid openings, respectively; and third input and output pipes fluidly connectable to each of the third pair of fluid openings, respectively.

4 . The pump assembly according to claim 1 , wherein the housing is tubular and each of the first, second and third pairs of fluid openings circumferentially extend along an arc-segment of the housing.

5 . The pump assembly according to claim 1 , further comprising:
a first spline coupling by which the first and third rotary pumps are connectable; and a second spline coupling by which the third and second rotary pumps are connectable.

6 . The pump assembly according to claim 1 , wherein:
the first rotary pump comprises a charge pump with a standard hub diameter and a non-standard hub length, the second rotary pump comprises a scavenge pump with a standard hub diameter and a non-standard hub length, and the third rotary pump comprises an inversion pump with a standard hub diameter and a non-standard hub length.

7 . The pump assembly according to claim 6 , wherein the first and third rotary pumps direct fluid flow in a first direction at about 10.85 GPM at 7176 RPM and the second rotary pump directs fluid flow in a second direction opposite the first direction at about 11.51 GPM at 7176 RPM.

8 . The pump assembly according to claim 1 , wherein:
the first rotary pump comprises a charge pump with a hub diameter of about 0.8454 inches and a hub length of about 0.5635 inches, the second rotary pump comprises a scavenge pump with a hub diameter of about 0.8454 inches and a hub length of about 0.7451 inches, and the third rotary pump comprises an inversion pump with a hub diameter of about 0.8454 inches and a hub length of about 0.5635 inches.

9 . The pump assembly according to claim 8 , wherein the first and third rotary pumps direct fluid flow in a first direction at about 10.85 GPM at 7176 RPM and the second rotary pump directs fluid flow in a second direction opposite the first direction at about 11.51 GPM at 7176 RPM.

10 . A pump assembly, comprising:
a housing having opposed open and closed ends and plural pairs of fluid openings at plural axial locations, respectively, an end plate having an aperture secured to the housing at the open end; and plural rotary pumps, which are co-rotatable at the plural axial locations, respectively, about a common longitudinal axis defined through the housing to drive fluid flow relative to the plural pairs of fluid openings, respectively, one of the plural rotary pumps comprising an input member extendable through the aperture to be receptive of rotational drive energy for the plural rotary pumps.

11 . The pump assembly according to claim 10 , wherein the plural rotary pumps comprise:
a charge pump with a standard hub diameter and a non-standard hub length that directs fluid flow in a first direction at about 10.85 GPM at 7176 RPM, a scavenge pump with a standard hub diameter and a non-standard hub length that directs fluid flow in a second direction opposite the first direction at about 11.51 GPM at 7176 RPM, and an inversion pump with a standard hub diameter and a non-standard hub length that directs fluid flow in a first direction at about 10.85 GPM at 7176 RPM.

12 . A pump assembly, comprising:
a housing having opposed open and closed ends, a first pair of fluid openings at a first axial location proximate to the open end, a second pair of fluid openings at a second axial location proximate to the closed end and a third pair of fluid openings at a third axial location between the first and second axial locations; an end plate having an aperture secured to the housing at the open end; and first, second and third rotary pumps, which are co-rotatable at the first, second and third axial locations, respectively, about a common longitudinal axis defined through the housing to drive fluid flow relative to the first, second and third pairs of fluid openings, respectively, the first rotary pump comprising an input member extendable through the aperture to be receptive of rotational drive energy for the first, second and third rotary pumps.

13 . The pump assembly according to claim 12 , further comprising a drive shaft coupled to the input member.

14 . The pump assembly according to claim 12 , further comprising:
first input and output pipes fluidly connectable to each of the first pair of fluid openings, respectively; second input and output pipes fluidly connectable to each of the second pair of fluid openings, respectively; and third input and output pipes fluidly connectable to each of the third pair of fluid openings, respectively.

15 . The pump assembly according to claim 12 , wherein the housing is tubular and each of the first, second and third pairs of fluid openings circumferentially extend along an arc-segment of the housing.

16 . The pump assembly according to claim 12 , further comprising:
a first spline coupling by which the first and third rotary pumps are connectable; and a second spline coupling by which the third and second rotary pumps are connectable.

17 . The pump assembly according to claim 12 , wherein:
the first rotary pump comprises a charge pump with a standard hub diameter and a non-standard hub length, the second rotary pump comprises a scavenge pump with a standard hub diameter and a non-standard hub length, and the third rotary pump comprises an inversion pump with a standard hub diameter and a non-standard hub length.

18 . The pump assembly according to claim 17 , wherein the first and third rotary pumps direct fluid flow in a first direction at about 10.85 GPM at 7176 RPM and the second rotary pump directs fluid flow in a second direction opposite the first direction at about 11.51 GPM at 7176 RPM.

19 . The pump assembly according to claim 12 , wherein:
the first rotary pump comprises a charge pump with a hub diameter of about 0.8454 inches and a hub length of about 0.5635 inches, the second rotary pump comprises a scavenge pump with a hub diameter of about 0.8454 inches and a hub length of about 0.7451 inches, and the third rotary pump comprises an inversion pump with a hub diameter of about 0.8454 inches and a hub length of about 0.5635 inches.

20 . The pump assembly according to claim 19 , wherein the first and third rotary pumps direct fluid flow in a first direction at about 10.85 GPM at 7176 RPM and the second rotary pump directs fluid flow in a second direction opposite the first direction at about 11.51 GPM at 7176 RPM.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Wilkinson Andrew R
• Grosskopf Andrew P

Classifications

• F04C2270/0525

  Controlled or regulated · CPC title

• F04C11/003 Primary

  having complementary function · CPC title

• F04C15/0073

  Couplings between rotors and input or output shafts acting by interengaging or mating parts, i.e. positive coupling of rotor and shaft · CPC title

• F04C2240/30

  Casings or housings · CPC title

• F04C15/06

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