CN219672784U - Electric fuel combination pump housing for aero-engine - Google Patents
Electric fuel combination pump housing for aero-engine Download PDFInfo
- Publication number
- CN219672784U CN219672784U CN202320334072.4U CN202320334072U CN219672784U CN 219672784 U CN219672784 U CN 219672784U CN 202320334072 U CN202320334072 U CN 202320334072U CN 219672784 U CN219672784 U CN 219672784U
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- hole
- pump
- centrifugal pump
- gear pump
- volute
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- 239000000446 fuel Substances 0.000 title claims abstract description 27
- 239000003921 oil Substances 0.000 claims abstract description 51
- 238000004891 communication Methods 0.000 claims abstract description 13
- 239000000295 fuel oil Substances 0.000 claims abstract description 8
- 230000000149 penetrating effect Effects 0.000 claims abstract description 4
- 238000012423 maintenance Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000000605 extraction Methods 0.000 claims description 2
- 238000009434 installation Methods 0.000 description 6
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
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- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model relates to an electric fuel combination pump housing for an aeroengine, which comprises a centrifugal pump volute and a gear pump housing with a gear pump body mounting cavity, wherein the centrifugal pump volute is connected with the gear pump housing through a connecting baffle plate, and a first connecting shaft through hole and a second through hole are formed in the connecting baffle plate; the volute of the centrifugal pump is provided with a connecting through hole and an outlet opening, and the outlet opening is communicated with the centrifugal pump outlet; the gear pump shell is provided with a second connecting shaft through hole and a third through hole, and the third through hole is communicated with an oil inlet hole of the gear pump; the connecting through hole, the first connecting shaft through hole and the second connecting shaft through hole are communicated in sequence and used for penetrating and fixedly supporting the connecting shaft; the sequential communication of the outlet opening, the second through-hole and the third through-hole is used for oil circuit communication between pumps. The utility model combines the centrifugal pump and the gear pump together, simplifies the structure of the two-stage pump, reduces the volume and weight of the whole pump, shortens the oil path between the centrifugal stage and the gear stage, and reduces the loss of fuel oil in flowing.
Description
Technical Field
The utility model relates to the technical field of fuel pumps of aeroengines, in particular to a shell structure of an electric fuel combination pump of an aeroengine.
Background
The aircraft engine fuel pump is capable of converting mechanical energy of a prime mover into energy of fuel having a certain flow rate and a certain pressure. Different types of oil pumps are adopted according to different design requirements, and the gear pump or the plunger pump is generally adopted to supply oil for the main combustion chamber at present.
When using a gear pump, a centrifugal pump is typically designed to initially boost the pressure before the gear stage, and to let the pressurized fuel into the gear stage. Most of the existing installation methods are to install the centrifugal pump and the gear pump separately, and the installation methods can complicate the structure of the pump body and have large volume weight, so that the installation and maintenance are inconvenient. In addition, the fuel oil way flowing into the inlet of the gear pump from the outlet of the centrifugal pump is too long, so that the energy of the fuel is greatly lost.
Disclosure of Invention
The utility model aims to avoid the defects of the prior art and provide an electric fuel combination pump housing for an aeroengine, which aims to reduce the volume and weight of the whole pump by realizing combination design through structural optimization of a two-stage pump.
In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the electric fuel oil combined pump comprises a centrifugal pump and a gear pump, wherein the centrifugal pump and the gear pump are coaxially driven by a connecting shaft, the housing of the combined pump comprises a centrifugal pump volute and a gear pump housing with a gear pump body mounting cavity, and the centrifugal pump volute is used for mounting the centrifugal pump body and collecting fuel oil thrown out by an impeller of the centrifugal pump; the centrifugal pump volute is provided with an opening corresponding to the centrifugal pump inlet, and the gear pump housing is provided with an opening corresponding to the gear pump outlet;
the centrifugal pump volute is connected with the gear pump shell through a connecting baffle plate, and a first connecting shaft through hole and a second through hole are formed in the connecting baffle plate; the centrifugal pump volute is provided with a connecting through hole and an outlet opening, wherein the connecting through hole is communicated with the first connecting shaft through hole and the second through hole, and the outlet opening is communicated with the centrifugal pump outlet; the gear pump shell is provided with a second connecting shaft through hole and a third through hole which are communicated with the first connecting shaft through hole and the second through hole, and the third through hole is communicated with an oil inlet hole of the gear pump; the connecting through holes, the first connecting shaft through holes and the second connecting shaft through holes are communicated in sequence and used for penetrating and fixedly supporting the connecting shaft; the sequential communication of the outlet opening, the second through hole and the third through hole is used for oil way communication between the centrifugal pump and the gear pump.
Further, the opening arranged on the centrifugal pump volute corresponding to the centrifugal pump inlet is an inlet opening, a first threaded hole for installing an oil inlet pipeline flange is arranged on the centrifugal pump volute around the inlet opening, a first connecting plate is arranged on the centrifugal pump volute on one side connected with the connecting baffle, and the outlet opening and the connecting through hole are both arranged on the first connecting plate;
the outlet opening is coaxially arranged and communicated with a second through hole on the connecting baffle plate; the inlet opening and the connecting through hole are coaxially arranged with the first connecting shaft through hole on the connecting baffle plate.
Further, a second connecting plate is arranged on the gear pump shell at one side connected with the connecting baffle, the second connecting shaft through hole and the third through hole are arranged on the second connecting plate, the third through hole is communicated with the oil inlet hole through the oil way communication chamber, and an opening arranged on the gear pump shell corresponding to the oil outlet of the gear pump is an oil outlet hole;
the third through hole and the second through hole on the connecting baffle are coaxially arranged; the second connecting shaft through hole is coaxially arranged with the first connecting shaft through hole on the connecting baffle plate.
Further, a fourth through hole is further formed in the oil way communication chamber and used for leading low-pressure oil out of the cooling motor assembly; and a second threaded hole is arranged around the fourth through hole and used for installing and leading out the oil pipeline flange.
Further, a circular boss for installing a centrifugal pump bearing is arranged on the connecting baffle corresponding to the first connecting shaft through hole, and the circular boss is coaxially matched with the inner wall surface of the centrifugal pump volute.
Furthermore, a spring hole is further formed in the connecting baffle plate and used for installing a spring to apply axial compensation force to the floating bearing of the gear pump.
Further, a first positioning pin hole, a second positioning pin hole and a third positioning pin hole are respectively arranged on the first connecting plate of the centrifugal pump volute, the connecting baffle plate and the second connecting plate of the gear pump housing, and the first positioning pin hole, the second positioning pin hole and the third positioning pin hole are correspondingly arranged for positioning the centrifugal pump volute, the connecting baffle plate and the gear pump housing through pins.
Further, be equipped with first screw unthreaded hole, second screw unthreaded hole and third screw hole on the first connecting plate of centrifugal pump spiral case and the second connecting plate of connecting baffle, gear pump shell respectively, and first screw unthreaded hole, second screw unthreaded hole and third screw hole correspond each other and set up for through the connection between screw connection centrifugal spiral case, connecting baffle and the gear pump shell, convenient dismantlement is convenient for assembly, inspection and the maintenance of each part.
The beneficial effects of the utility model are as follows:
as the shell design of the fuel combination pump, the utility model provides a shell which combines the centrifugal pump and the gear pump which are separately arranged in the traditional fuel pump framework, thereby simplifying the structure of the two-stage pump, reducing the volume weight of the whole pump, shortening the oil path between the centrifugal stage and the gear stage and reducing the loss of fuel in the flowing process.
The structure of the utility model can optimize the radial positioning mode of the main shaft on the shell and realize the coaxial transmission of the two-stage pump; secondly, enabling fuel oil at an outlet of the centrifugal pump to directly enter an inlet of the gear pump through a short oil path, and reducing the loss of the fuel oil in the flowing process; finally, through the two points, namely coaxial transmission and oil circuit simplification, the two-stage pump is converted from independent installation into combined design.
Drawings
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is a schematic diagram of a side structure of a centrifugal pump volute of the present utility model;
FIG. 3 is a schematic view of the structure of the connection side of the volute of the centrifugal pump of the present utility model;
FIG. 4 is a schematic view of the structure of the connecting baffle plate of the present utility model;
fig. 5 is a schematic structural view of a gear pump housing according to the present utility model.
In the figure: 1-centrifugal pump housing, 11-inlet opening, 12-first screw hole, 13-first connecting plate, 14-outlet opening, 15-connecting through hole, 16-gear pump volute inner surface, 17-first screw unthreaded hole, 18-first positioning pin hole, 2-connecting baffle, 21-second through hole, 22-first connecting shaft through hole, 23-connecting baffle annular protrusion, 24-second screw unthreaded hole, 25-second positioning pin hole, 26-spring hole, 3-gear pump housing, 31-second connecting plate, 32-second connecting shaft through hole, 33-third through hole, 34-oil inlet hole, 35-oil circuit communicating chamber, 36-oil outlet hole, 37-fourth through hole, 38-second screw hole, 39-third screw hole, 40-third positioning pin hole.
Detailed Description
The principles and features of the present utility model are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the utility model and are not to be construed as limiting the scope of the utility model.
In order to achieve the above object, the present utility model provides the following embodiments:
example 1: as shown in fig. 1-5, an electric fuel combination pump housing for an aeroengine is composed of a centrifugal pump and a gear pump which are coaxially driven by a connecting shaft, wherein the housing of the combination pump comprises a centrifugal pump volute 1 and a gear pump housing 3 with a gear pump body mounting cavity, and the centrifugal pump volute 1 is used for mounting the centrifugal pump body and collecting fuel thrown out by the centrifugal pump impeller; the centrifugal pump volute 1 is provided with an opening corresponding to the centrifugal pump inlet, and the gear pump shell 3 is provided with an opening corresponding to the gear pump oil outlet; the opening corresponding to the centrifugal pump inlet is an inlet opening 11, and the centrifugal pump volute 1 around the inlet opening 11 is provided with a first threaded hole 12 for installing an oil inlet pipeline flange;
the centrifugal pump volute 1 is connected with the gear pump housing 3 through a connecting baffle plate 2, and a first through hole 22 and a second through hole 21 are formed in the connecting baffle plate 2; the centrifugal pump volute 1 is provided with a connecting through hole 15 and an outlet opening 14 which are communicated with the first connecting shaft through hole 22 and the second through hole 21, and the outlet opening 14 is communicated with the centrifugal pump outlet; a second connecting shaft through hole 32 and a third through hole 33 which are communicated with the first connecting shaft through hole 22 and the second through hole 21 are arranged on the gear pump shell 3, and the third through hole 33 is communicated with an oil inlet hole 34 of the gear pump; the connecting through holes 15, the first connecting shaft through holes 22 and the second connecting shaft through holes 32 are sequentially communicated and used for penetrating and fixedly supporting the connecting shaft; the sequential communication of the outlet opening 14, the second through hole 21 and the third through hole 33 is used for oil communication between the centrifugal pump and the gear pump.
A first connecting plate 13 is arranged on the centrifugal pump volute 1 at one side connected with the connecting baffle plate 2, and the outlet opening 14 and the connecting through hole 15 are arranged on the first connecting plate 13; the outlet opening 14 is coaxially arranged and communicated with a second through hole 21 on the connecting baffle plate 2; the inlet opening 11 and the connecting through hole 15 are coaxially arranged with the first connecting shaft through hole 22 on the connecting baffle plate 2.
A second connecting plate 31 is arranged on the gear pump shell 3 at one side connected with the connecting baffle plate 2, the second connecting shaft through hole 32 and the third through hole 33 are arranged on the second connecting plate 31, the third through hole 33 is communicated with the oil inlet hole 34 through an oil way communicating chamber 35, and a hole corresponding to the oil outlet of the gear pump is an oil outlet hole 36; a fourth through hole 37 is also arranged on the oil-way communication chamber 35 and is used for leading low-pressure oil out of the cooling motor assembly; a second screw hole 38 is provided around the fourth through hole 37 for mounting an oil delivery pipe flange for extraction.
The third through hole 33 and the second through hole 21 on the connecting baffle plate 2 are coaxially arranged; the second through-hole 32 is coaxially disposed with the first through-hole 22 of the connecting baffle 2.
The connecting baffle plate 2 is provided with a circular boss 23 corresponding to the first connecting shaft through hole 22, the circular boss 23 is used for installing a centrifugal pump bearing, and the circular boss 23 is coaxially matched with the inner wall surface 16 of the centrifugal pump volute 1. The connecting baffle plate 2 is also provided with a spring hole 26 for installing a spring to apply axial compensation force to the floating bearing of the gear pump.
The first connecting plate 13 and the second connecting plate 31 of the connecting baffle plate 2 and the gear pump housing 3 of the centrifugal pump volute 1 are respectively provided with a first positioning pin hole 18, a second positioning pin hole 25 and a third positioning pin hole 40, and the first positioning pin hole 18, the second positioning pin hole 25 and the third positioning pin hole 40 are correspondingly arranged for positioning the centrifugal pump volute 1, the connecting baffle plate 2 and the gear pump housing 3 through pins. The first connecting plate 13 and the connecting baffle plate 2 of the centrifugal pump volute 1 and the second connecting plate 31 of the gear pump housing 3 are respectively provided with a first screw unthreaded hole 17, a second screw unthreaded hole 24 and a third threaded hole 39, and the first screw unthreaded hole 17, the second screw unthreaded hole 24 and the third threaded hole 39 are correspondingly arranged mutually and are used for connecting the centrifugal volute 1 and the connecting baffle plate 2 with the gear pump housing 3 through screws, so that the centrifugal pump volute is convenient to detach and convenient to assemble, inspect and maintain each part.
The utility model mainly aims at an electric fuel combination pump which consists of a centrifugal pump and a gear pump which are coaxially driven, wherein the centrifugal pump is a booster stage in front of the gear pump, namely the fuel outlet pressure of the centrifugal pump enters the gear pump stage at the inlet pressure of the gear pump. The utility model provides a shell for the combined pump, and the structure comprises the shell, and screw holes and pin holes which are processed on the shell.
As shown in fig. 1, the combined pump housing consists of a centrifugal stage housing, a gear stage housing and a connecting baffle plate between the centrifugal stage housing and the gear stage housing, wherein the three parts are positioned through threaded connection and pins, and the split type housing design is convenient for assembly, inspection and maintenance of various parts.
Fig. 2 and 3 show a centrifugal stage housing, also called a centrifugal pump volute, which has mainly two functions, namely mounting centrifugal pump parts and collecting fuel thrown out by an impeller. Wherein the inlet opening 11 is the inlet of the centrifugal pump and also of the combination pump, four first threaded holes 12 at the inlet for connection of the incoming oil ducts and the outlet opening 14 is the outlet of the centrifugal stage.
As shown in fig. 4, in order to facilitate the installation of the two-stage pump assembly, the connection baffle 2 is designed and, as a part of the assembled pump housing, a second through hole 21 is formed thereon for the oil-way communication of the two-stage pump. The connecting baffle has the main functions of being used for transitional connection of the centrifugal pump shell and the gear pump shell, and secondly, the protruding ring structure designed on the connecting baffle is used for installing a centrifugal pump bearing and radial positioning of a centrifugal pump main shaft.
Fig. 5 shows a gear stage housing structure, wherein the oil inlet 34 is the inlet of the gear stage, and the oil outlet 36 is the outlet of the gear pump and also the outlet of the combination pump. The cavity inside the gear pump stage shell is used for installing parts such as a driving gear, a driven gear, a bearing and the like, and four threaded holes at the outlet of the gear pump are convenient for installing a pipeline behind the pump. Considering that this housing is used for an electric fuel pump, four through holes are designed on the housing end face for the installation of the combination pump and motor.
In addition, a fourth through hole 37 is formed at the inlet of the gear pump, low-pressure oil is led out to cool the motor rotor and other parts, so that an additional oil way can be avoided, and a threaded hole formed in the fourth through hole 37 is used for connecting an oil pipeline.
During operation, fuel enters the booster stage centrifugal pump from the inlet opening 11, flows out from the outlet opening 14 of the centrifugal pump housing after being boosted by the centrifugal pump, flows through the connecting baffle plate from the second through hole 21, enters the gear pump through the oil inlet hole 34, flows into the post-pump oil path from the oil outlet hole 36 under the interaction of the main and auxiliary gears, and is conveyed to the combustion chamber of the aeroengine.
The foregoing description of the preferred embodiments of the utility model is not intended to limit the utility model to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the utility model are intended to be included within the scope of the utility model.
Claims (8)
1. The electric fuel oil combined pump for the aeroengine is characterized by comprising a centrifugal pump and a gear pump, wherein the centrifugal pump and the gear pump are coaxially driven by a connecting shaft, the combined pump comprises a centrifugal pump volute (1) and a gear pump shell (3) with a gear pump body mounting cavity, and the centrifugal pump volute (1) is used for mounting a centrifugal pump body and collecting fuel oil thrown out by an impeller of the centrifugal pump; the centrifugal pump volute (1) is provided with an opening corresponding to the centrifugal pump inlet, and the gear pump shell (3) is provided with an opening corresponding to the gear pump oil outlet;
the centrifugal pump volute (1) is connected with the gear pump shell (3) through a connecting baffle (2), and a first connecting shaft through hole (22) and a second through hole (21) are formed in the connecting baffle (2); a connecting through hole (15) communicated with the first connecting shaft through hole (22) and the second through hole (21) and an outlet opening (14) are arranged on the centrifugal pump volute (1), and the outlet opening (14) is communicated with the centrifugal pump outlet; a second connecting shaft through hole (32) and a third through hole (33) which are communicated with the first connecting shaft through hole (22) and the second through hole (21) are arranged on the gear pump shell (3), and the third through hole (33) is communicated with an oil inlet hole (34) of the gear pump; the connecting through holes (15), the first connecting shaft through holes (22) and the second connecting shaft through holes (32) are sequentially communicated and used for penetrating and fixedly supporting the connecting shaft; the sequential communication of the outlet opening (14), the second through hole (21) and the third through hole (33) is used for oil way communication between the centrifugal pump and the gear pump.
2. The electric fuel combination pump housing for the aeroengine according to claim 1, wherein the opening arranged on the centrifugal pump volute (1) corresponding to the inlet of the centrifugal pump is an inlet opening (11), a first threaded hole (12) for installing an oil inlet pipeline flange is arranged on the centrifugal pump volute (1) around the inlet opening (11), a first connecting plate (13) is arranged on the centrifugal pump volute (1) on one side connected with the connecting baffle plate (2), and the outlet opening (14) and the connecting through hole (15) are both arranged on the first connecting plate (13);
the outlet opening (14) and the second through hole (21) on the connecting baffle plate (2) are coaxially arranged and communicated; the inlet opening (11) and the connecting through hole (15) are coaxially arranged with the first connecting shaft through hole (22) on the connecting baffle plate (2).
3. The electric fuel combination pump housing for the aeroengine according to claim 1, wherein a second connecting plate (31) is arranged on the gear pump housing (3) on the side connected with the connecting baffle plate (2), the second connecting shaft through hole (32) and a third through hole (33) are arranged on the second connecting plate (31), the third through hole (33) is communicated with the oil inlet hole (34) through an oil way communicating chamber (35), and an opening hole arranged on the gear pump housing (3) corresponding to the oil outlet of the gear pump is an oil outlet hole (36);
the third through hole (33) and the second through hole (21) on the connecting baffle plate (2) are coaxially arranged; the second connecting shaft through hole (32) is coaxially arranged with the first connecting shaft through hole (22) on the connecting baffle plate (2).
4. An electric fuel combination pump housing for an aircraft engine according to claim 3, characterized in that a fourth through hole (37) is provided in said oil passage communication chamber (35) for leading low pressure oil out of the cooling motor assembly; a second threaded hole (38) is arranged around the fourth through hole (37) and is used for installing an oil pipeline flange for extraction.
5. The electric fuel combination pump housing for an aeroengine according to claim 1, wherein a circular boss (23) for mounting a centrifugal pump bearing is provided on the connecting baffle plate (2) corresponding to the first connecting shaft through hole (22), and the circular boss (23) is coaxially matched with the inner wall surface (16) of the centrifugal pump volute (1).
6. An electric fuel combination pump housing for an aircraft engine according to claim 1, characterized in that spring holes (26) are also provided in the connecting baffle (2) for mounting springs for applying an axial compensation force to the floating bearing of the gear pump.
7. The electric fuel combination pump housing for an aircraft engine according to any one of claims 1 to 6, wherein a first positioning pin hole (18), a second positioning pin hole (25) and a third positioning pin hole (40) are respectively arranged on a first connecting plate (13) and a connecting baffle plate (2) of the centrifugal pump volute (1) and a second connecting plate (31) of the gear pump housing (3), and the first positioning pin hole (18), the second positioning pin hole (25) and the third positioning pin hole (40) are correspondingly arranged for positioning the centrifugal pump volute (1), the connecting baffle plate (2) and the gear pump housing (3) through pins.
8. The electric fuel combination pump housing for the aeroengine according to any one of claims 1 to 6, wherein the first connecting plate (13) and the connecting baffle plate (2) of the centrifugal pump volute (1) and the second connecting plate (31) of the gear pump housing (3) are respectively provided with a first screw unthreaded hole (17), a second screw unthreaded hole (24) and a third threaded hole (39), and the first screw unthreaded hole (17), the second screw unthreaded hole (24) and the third threaded hole (39) are correspondingly arranged for connecting the centrifugal pump volute (1), the connecting baffle plate (2) and the gear pump housing (3) through screws, so that the connection between the centrifugal pump volute is convenient, and the assembly, the inspection and the maintenance of each part are convenient.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320334072.4U CN219672784U (en) | 2023-02-28 | 2023-02-28 | Electric fuel combination pump housing for aero-engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320334072.4U CN219672784U (en) | 2023-02-28 | 2023-02-28 | Electric fuel combination pump housing for aero-engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219672784U true CN219672784U (en) | 2023-09-12 |
Family
ID=87928532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320334072.4U Active CN219672784U (en) | 2023-02-28 | 2023-02-28 | Electric fuel combination pump housing for aero-engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219672784U (en) |
-
2023
- 2023-02-28 CN CN202320334072.4U patent/CN219672784U/en active Active
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