Fuel supply module, engine auxiliary power device and aircraft engine

Abstract

The invention discloses a fuel supply module, an engine auxiliary power device and an aircraft engine, and belongs to the technical field of engines. According to the fuel supply module, the engine auxiliary power device and the aircraft engine, the vane pump and the gear pump can pressurize the fuel, the fuel is filtered through the fuel filter, the problems of clamping stagnation and the like of the gear pump can be avoided, and the stability and uniformity of fuel supply are guaranteed; when the fuel filter is blocked, the vane pump can be communicated with the gear pump through the bypass valve, normal supply of fuel is guaranteed, meanwhile, an alarm is given in time through the alarm, workers are prompted to conduct maintenance in time, and the reliability of the fuel supply module is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of engines, and in particular to a fuel supply module, an engine auxiliary power unit and an aircraft engine. Background Art

[0002] For aircraft engines, a command signal is usually sent through the engine control unit (ECB) to control the motor-driven oil pump of the fuel supply module to supply fuel to the combustion chamber of the auxiliary power unit (APU) for combustion.

[0003] The existing fuel supply module has poor reliability and is prone to uneven fuel flow or even fuel supply interruption, which causes the APU to malfunction and affects the performance and service life of the APU. Summary of the invention

[0004] The object of the present invention is to provide a fuel supply module, an engine auxiliary power unit and an aircraft engine, which improve the reliability of the fuel supply module.

[0005] In order to achieve the above objectives, the following technical solutions are provided:

[0006] In a first aspect, a fuel supply module is provided, comprising:

[0007] A vane pump, a fuel filter and a gear pump, wherein the vane pump, the fuel filter and the gear pump are connected in sequence, and an outlet of the gear pump is used to communicate with a combustion chamber of an auxiliary power unit of an engine;

[0008] A rotary driving member, the rotary driving member is used to drive the vane pump and the gear pump to work;

[0009] a bypass valve capable of connecting the vane pump to the gear pump when the fuel filter is clogged;

[0010] A safety monitoring component, comprising a pressure difference detection element and an alarm, wherein the pressure difference detection element is used to detect the pressure difference between the inlet and outlet of the fuel filter, and the alarm can sound an alarm according to the pressure difference;

[0011] A safety valve is provided at the outlet of the gear pump.

[0012] As an optional solution of the fuel supply module, the rotary drive member includes a drive member housing, the vane pump includes a first pump housing, the gear pump includes a second pump housing, and the drive member housing, the first pump housing and the second pump housing are fixedly connected to form an integrated housing;

[0013] The fuel filter, the bypass valve, the alarm and the safety valve are all fixedly arranged on the integrated housing.

[0014] As an optional solution of the fuel supply module, the fuel supply module further comprises an electrical connector electrically connected to the rotary drive member, and the electrical connector is fixedly mounted on the drive member housing.

[0015] As an optional solution for the fuel supply module, the drive member housing includes a wiring harness cavity and a wiring harness cover plate, one end of the wiring harness cavity is provided with a first opening, and the wiring harness cover plate is used to close the first opening.

[0016] As an optional solution of the fuel supply module, the fuel supply module further includes an oil inlet joint connected to the inlet of the vane pump, and the oil inlet joint is fixed to the first pump housing;

[0017] The fuel supply module further includes an oil outlet joint communicated with an outlet of the gear pump, and the oil outlet joint is fixedly arranged on the second pump housing.

[0018] As an optional solution of the fuel supply module, the inlet of the safety valve is communicated with the outlet of the gear pump, and the outlet of the safety valve is communicated with the inlet of the fuel filter.

[0019] As an optional solution of the fuel supply module, the fuel supply module further includes an oil pressure detection member, and the oil pressure detection member is used to detect the fuel pressure at the inlet of the vane pump.

[0020] As an optional solution of the fuel supply module, the rotary drive member is a brushless DC motor; and / or,

[0021] The safety monitoring component is a pressure differential alarm, and the pressure differential alarm is arranged in parallel with the fuel filter; and / or,

[0022] The bypass valve is a one-way valve, and the one-way valve is arranged in parallel with the fuel filter.

[0023] In a second aspect, an engine auxiliary power unit is provided, comprising a fuel supply module as described in any one of the above items.

[0024] In a third aspect, an aircraft engine is provided, comprising the engine auxiliary power unit as described above.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The fuel supply module, engine auxiliary power unit and aircraft engine of the present invention, the vane pump and the gear pump can both pressurize the fuel and filter the fuel through the fuel filter, which can avoid problems such as the gear pump being stuck, so as to ensure the stability and uniformity of the fuel supply; when the fuel filter is blocked, the vane pump and the gear pump can be connected through the bypass valve to ensure the normal supply of fuel, and at the same time, an alarm can be issued in time through the alarm to prompt the staff to carry out timely maintenance, thereby improving the reliability of the fuel supply module. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of a fuel supply module in an embodiment of the present invention;

[0028] Figure 2 Schematic diagram of the structure of the fuel supply module in an embodiment of the present invention.

[0029] Reference numerals:

[0030] 1. vane pump; 11. first pump housing; 111. pump cover; 12. booster vane;

[0031] 2. Fuel filter;

[0032] 3. gear pump; 31. second pump housing; 32. gear pair;

[0033] 4. Rotating drive member; 41. Drive member housing; 411. Wiring harness cavity; 412. Wiring harness cover; 42. Stator; 43. Rotor; 44. Rotating shaft;

[0034] 5. Bypass valve; 6. Safety monitoring component; 7. Safety valve; 8. Oil pressure detection component;

[0035] 9. Integrated housing; 91. One-piece housing; 911. Motor cavity; 912. Gear cavity; 913. Shaft hole; 914. Motor cover;

[0036] 10. Shaft seal. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0038] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0039] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0040] In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or are the positions or positional relationships in which the inventive product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0041] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "disposed" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0043] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0044] like Figure 1 As shown, this embodiment provides a fuel supply module, including a vane pump 1, a fuel filter 2, a gear pump 3, a rotary drive member 4, a bypass valve 5, a safety monitoring component 6 and a safety valve 7. The vane pump 1, the fuel filter 2 and the gear pump 3 are connected in sequence, and the outlet of the gear pump 3 is used to communicate with the combustion chamber of the engine auxiliary power unit; the rotary drive member 4 is used to drive the vane pump 1 and the gear pump 3 to work; the bypass valve 5 can connect the vane pump 1 with the gear pump 3 when the fuel filter 2 is blocked; the safety monitoring component 6 includes a pressure difference detection member and an alarm, the pressure difference detection member is used to detect the pressure difference between the inlet and outlet of the fuel filter 2, and the alarm can alarm according to the pressure difference measured by the pressure difference detection member; the safety valve 7 is arranged at the outlet of the gear pump 3.

[0045] In the fuel supply module, engine auxiliary power unit and aircraft engine of this embodiment, the vane pump 1 and the gear pump 3 can both pressurize the fuel and filter the fuel through the fuel filter 2, which can avoid problems such as sticking of the gear pump 3 to ensure the stability and uniformity of the fuel supply; when the fuel filter 2 is blocked, the vane pump 1 can be connected to the gear pump 3 through the bypass valve 5 to ensure the normal supply of fuel, and at the same time, an alarm can be issued in time through the alarm to prompt the staff to carry out timely maintenance, thereby improving the reliability of the fuel supply module.

[0046] Optionally, the fuel supply module further includes an oil pressure detection member 8, which is used to detect the fuel pressure at the inlet of the vane pump 1. The fuel pressure at the inlet of the vane pump 1 is monitored in real time by the oil pressure detection member 8, and the fuel pressure at the inlet of the vane pump 1 is controlled according to the detection result of the oil pressure member, so as to ensure the long-term reliable operation of the gear pump 3. Exemplarily, the oil pressure detection member 8 is a pressure sensor.

[0047] Optionally, the inlet of the safety valve 7 is connected to the outlet of the gear pump 3, and the outlet of the safety valve 7 is connected to the inlet of the fuel filter 2. When the fuel pressure at the outlet of the gear pump 3 exceeds the safety pressure of the safety valve 7, the safety valve 7 opens to allow a portion of the fuel to return to the inlet of the fuel filter 2 after passing through the safety valve 7, which, on the one hand, achieves the purpose of pressure relief, and on the other hand, helps to reduce the working pressure of the vane pump 1 and also has the effect of energy saving. Exemplarily, the safety valve 7 is a relief valve.

[0048] Optionally, the rotary drive member 4 is a brushless DC motor, which has the advantages of fast response and being able to provide rated torque. By driving the vane pump 1 and the gear pump 3 through the brushless DC motor, the stability and uniformity of the fuel flow rate can be ensured.

[0049] Optionally, the safety monitoring component 6 is a differential pressure alarm, which is arranged in parallel with the fuel filter 2. The differential pressure alarm monitors the differential pressure between the inlet and outlet of the fuel filter 2 in real time. When the measured differential pressure is greater than a preset value, it indicates that the fuel filter 2 is clogged, and the differential pressure alarm gives an alarm. The differential pressure alarm is easy to assemble and has low cost.

[0050] Optionally, the bypass valve 5 is a one-way valve, which is arranged in parallel with the fuel filter 2. When the fuel filter 2 is clogged and the clogging pressure is greater than the opening pressure of the one-way valve, the one-way valve opens, so that part of the fuel can directly enter the gear pump 3 through the one-way valve, ensuring that the fuel supply will not be cut off, thereby improving the reliability of the fuel supply module. The one-way valve has a simple structure and low cost.

[0051] like Figure 2 As shown, it can be understood that the rotary drive member 4 includes a drive member housing 41, a stator 42, a rotor 43 and a rotating shaft 44, the stator 42 and the rotor 43 are both arranged in the drive member housing 41, and the rotating shaft 44 is fixedly connected to the rotor 43. The vane pump 1 includes a first pump housing 11 and a booster vane 12 arranged in the first pump housing 11. The gear pump 3 includes a second pump housing 31 and a gear pair 32 arranged in the second pump housing 31. This embodiment does not limit the number of gears and the gear arrangement of the gear pair 32. In other words, the gear pump 3 can adopt any gear pump 3 in the prior art.

[0052] Optionally, the drive housing 41, the first pump housing 11 and the second pump housing 31 are fixedly connected to form an integrated housing 9. Further, the fuel filter 2, the bypass valve 5, the alarm and the safety valve 7 are all fixedly arranged in the integrated housing 9. With such an arrangement, the fuel supply module can be integrated into a whole, which can not only reduce the occupied space, but also avoid fuel leakage.

[0053] Exemplarily, the drive member shell 41 and the second pump shell 31 are an integrally formed structure and are recorded as an integral shell 91. The integral shell 91 includes a motor cavity 911 (i.e., the inner cavity of the drive member shell 41), a gear cavity 912 (i.e., the inner cavity of the second pump shell 31) and an axial hole 913. One end of the motor cavity 911 is connected to the gear cavity 912 through the axial hole 913, and a second opening is provided at the end of the gear cavity 912 facing away from the axial hole 913; further, a third opening is provided at one end of the first pump shell 11, and the third opening is arranged opposite to the second opening, and the first pump shell 11 is fixedly connected to the integral shell 91 by fasteners such as bolts, thereby closing the second opening and the third opening, so that a closed oil cavity is formed between the first pump shell 11 and the integral shell 91.

[0054] Furthermore, the gear pair 32 is located in the gear cavity 912; the stator 42 and the rotor 43 are both located in the motor cavity 911, one end of the rotating shaft 44 is connected to the rotor 43 through a spline, and the other end passes through the shaft hole 913 and is connected to the main shaft of the gear pair 32, thereby driving the gear pair 32 to rotate to pressurize the fuel.

[0055] Furthermore, one end of the main shaft of the gear pair 32 that is away from the rotating shaft 44 is fixedly connected to the booster blade 12 of the vane pump 1, thereby driving the booster blade 12 to rotate to boost the fuel. It should be noted that a seal such as a shaft seal 10 is sleeved on the main shaft of the gear pair 32, so that the closed oil chamber is separated into two independent chambers through the shaft seal 10, that is, the gear chamber 912 is separated from the inner chamber of the first pump housing 11, so as to prevent the fuel from directly flowing between the gear pump 3 and the vane pump 1.

[0056] Such an arrangement facilitates driving the gear pump 3 and the impeller pump to work through the brushless DC motor, simplifies the structure of the integrated housing 9, facilitates assembly, and reduces costs.

[0057] Optionally, a fourth opening is provided at one end of the motor cavity 911 away from the shaft hole 913, and the fourth opening is provided with a motor cover 914. The motor cover 914 is fixedly connected to the integral shell 91 by locking members such as bolts and closes the fourth opening, thereby facilitating assembly or maintenance by disassembling the motor cover 914.

[0058] Optionally, a fifth opening is provided at the end of the first pump housing 11 facing away from the integral shell 91, and the fifth opening is provided with a pump cover 111. The pump cover 111 is fixedly connected to the first pump housing 11 by locking parts such as bolts and closes the fifth opening, thereby facilitating assembly or maintenance by disassembling the pump cover 111.

[0059] Optionally, the fuel supply module further includes an electrical connector electrically connected to the rotary drive member 4, and the electrical connector is fixed to the drive member housing 41. Further, the electrical connector includes a power supply connector and a signal connector, and can be quickly connected to an external power source through the power supply connector, and quickly connected to an engine controller through the signal connector, which is convenient to operate.

[0060] It should be noted that the electrical connector is connected to the rotary drive member 4 via a wiring harness.

[0061] Furthermore, the drive housing 41 includes a harness cavity 411 and a harness cover 412. One end of the harness cavity 411 is provided with a first opening, and the harness cover 412 is used to close the first opening. In this way, the harness can be stored in the harness cavity 411, and the harness cavity 411 can be closed by the harness cover 412, which is conducive to improving the neatness and aesthetics of the fuel supply module.

[0062] Optionally, the fuel supply module further includes an oil inlet connector connected to the inlet of the vane pump 1, and the oil inlet connector is fixed to the first pump housing 11. The oil inlet connector can be quickly connected to the oil inlet pipeline to improve the convenience of connection. Exemplarily, the oil pressure detection member 8 is installed on the oil inlet connector.

[0063] Optionally, the fuel supply module further includes an oil outlet connector connected to the outlet of the gear pump 3, and the oil outlet connector is fixed to the second pump housing 31. The oil outlet connector can be quickly connected to the fuel main pipe to improve the convenience of connection.

[0064] This embodiment also provides an engine auxiliary power device, including the above-mentioned fuel supply module. The engine auxiliary power device of this embodiment, by applying the above-mentioned fuel supply module, has the same beneficial effects as the above-mentioned fuel supply module, which will not be described in detail here.

[0065] This embodiment also provides an aircraft engine, including the engine auxiliary power device as described above. The aircraft engine of this embodiment, by applying the engine auxiliary power device as described above, has the same beneficial effects as the above fuel supply module, which will not be described in detail here.

[0066] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A fuel supply module, characterized in that: include: A vane pump (1), a fuel filter (2) and a gear pump (3), wherein the vane pump (1), the fuel filter (2) and the gear pump (3) are connected in sequence, and an outlet of the gear pump (3) is used to communicate with a combustion chamber of an engine auxiliary power unit; A rotary drive member (4), wherein the rotary drive member (4) is used to drive the vane pump (1) and the gear pump (3) to work; a bypass valve (5), wherein the bypass valve (5) is capable of connecting the vane pump (1) with the gear pump (3) when the fuel filter (2) is clogged; A safety monitoring component (6) comprising a pressure difference detection element and an alarm, wherein the pressure difference detection element is used to detect the pressure difference between the inlet and the outlet of the fuel filter (2), and the alarm can sound an alarm according to the pressure difference; A safety valve (7), wherein the safety valve (7) is arranged at the outlet of the gear pump (3).

2. The fuel supply module according to claim 1, characterized in that: The rotary drive member (4) comprises a drive member housing (41), the vane pump (1) comprises a first pump housing (11), the gear pump (3) comprises a second pump housing (31), the drive member housing (41), the first pump housing (11) and the second pump housing (31) are fixedly connected to form an integrated housing (9); The fuel filter (2), the bypass valve (5), the alarm and the safety valve (7) are all fixedly mounted on the integrated housing (9).

3. The fuel supply module according to claim 2, characterized in that: The fuel supply module also includes an electrical connector electrically connected to the rotary drive member (4), and the electrical connector is fixedly mounted on the drive member housing (41).

4. The fuel supply module according to claim 2, characterized in that: The drive member housing (41) comprises a wire harness cavity (411) and a wire harness cover plate (412); one end of the wire harness cavity (411) is provided with a first opening, and the wire harness cover plate (412) is used to close the first opening.

5. The fuel supply module according to claim 2, characterized in that: The fuel supply module further comprises an oil inlet joint connected to the inlet of the vane pump (1), wherein the oil inlet joint is fixedly mounted on the first pump housing (11); The fuel supply module further comprises an oil outlet joint communicated with the outlet of the gear pump (3), and the oil outlet joint is fixedly arranged on the second pump housing (31).

6. The fuel supply module according to claim 1, characterized in that: The inlet of the safety valve (7) is communicated with the outlet of the gear pump (3), and the outlet of the safety valve (7) is communicated with the inlet of the fuel filter (2).

7. The fuel supply module according to claim 1, characterized in that: The fuel supply module further comprises an oil pressure detection component (8), and the oil pressure detection component (8) is used to detect the fuel pressure at the inlet of the vane pump (1).

8. The fuel supply module according to any one of claims 1 to 7, characterized in that: The rotating drive member (4) is a brushless DC motor; and / or, The safety monitoring component (6) is a pressure difference alarm, and the pressure difference alarm is arranged in parallel with the fuel filter (2); and / or, The bypass valve (5) is a one-way valve, and the one-way valve is arranged in parallel with the fuel filter (2).

9. An engine auxiliary power unit, characterized in that: Comprising a fuel supply module as described in any one of claims 1-8.

10. An aircraft engine, characterized in that Comprising the engine auxiliary power unit as claimed in claim 9.

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