Helicopter integrated oil supply and transportation device

Abstract

The invention belongs to the technical field of helicopter fuel systems, and discloses a helicopter integrated oil supply and transportation device which comprises a booster pump unit and a jet pump which are integrated on an integrated oil supply and transportation device shell, the integrated oil supply and transportation device shell is arranged in an oil supply tank, and the top of the integrated oil supply and transportation device shell is connected with an inlet of an engine through an oil supply pipeline; one inlet of the jet pump is connected with the oil storage tank by connecting an oil conveying pipeline; an inlet of the booster pump unit is arranged outside the shell of the integrated oil supply and transportation device; and the outlet of the booster pump unit and the other inlet of the jet pump are communicated through a pipeline arranged in the integrated oil supply and transportation device shell and then are connected with an oil supply pipeline. According to the oil supply and transportation device, all scattered parts of an original oil supply and transportation device are functionally integrated into one device, the normal oil supply and transportation function is achieved, the number of the parts is reduced, the weight of the oil supply and transportation device is reduced, and the maintenance cost caused by regular replacement of a rubber pipeline is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of helicopter fuel systems, and relates to an oil delivery device for helicopter fuel, and in particular to an integrated oil supply and delivery device for helicopter. Background Art

[0002] The current traditional helicopter fuel supply and delivery device includes a separate fuel booster pump, a booster pump outlet check valve, an ejector pump inlet check valve, an ejector pump, a low-pressure signal device, a fuel supply pipeline, an ejector pipeline, a four-way joint and a booster pump mounting plate, which are combined together to realize its fuel supply and delivery function. Figure 1 . In order to improve the reliability and safety of fuel supply to the engine, two fuel boost pumps are usually installed on the accessory mounting plate at the bottom of the fuel supply tank. The fuel supply and flow resistance performance of each boost pump can meet the requirements. A boost pump outlet check valve is installed at the outlet of each boost pump. The fuel supply pipeline at its outlet is connected through a four-way joint. Part of the oil is provided to the engine inlet, and the other part is provided as an injection source to the injection pump installed in the fuel storage tank through the injection pipeline. The injection pump inlet check valve is installed in series on the injection pipeline. The fuel sucked from the fuel storage tank by the injection pump is transported to the fuel supply tank through the oil pipeline. A low-pressure signal device is installed in the fuel supply pipeline to monitor the working status of the boost pump.

[0003] The above-mentioned equipment is installed in a relatively scattered manner. The booster pump and its outlet check valve are installed at the bottom of the fuel tank, the ejector pump and its inlet check valve are installed in the fuel tank, and the low-pressure signal device is installed on the fuel supply pipeline outside the fuel tank. Each device is connected through pipelines. The farther the distance between the devices, the longer the pipeline. Such fuel supply and delivery components occupy a large installation space, increase the number and weight of system components, and at the same time, since the pipelines in the fuel tank are currently nitrile rubber hoses, the service life is about 10 years, and they need to be replaced regularly, which increases the maintenance cost. Summary of the invention

[0004] The invention provides an integrated oil supply and delivery device for a helicopter, which can solve the problems of large installation space occupied by oil supply and delivery components, large number of components, large weight and existing pipeline life.

[0005] The technical solution of the present invention is as follows:

[0006] A helicopter integrated oil supply and delivery device comprises a booster pump unit and an ejector pump integrated on an integrated oil supply and delivery device housing, the integrated oil supply and delivery device housing is arranged in an oil supply tank, the top of the integrated oil supply and delivery device housing is connected to the engine inlet through an oil supply pipeline; an inlet of the ejector pump is connected to the oil storage tank through the connecting oil delivery pipeline; the inlet of the booster pump unit is arranged outside the integrated oil supply and delivery device housing; the outlet of the booster pump unit and the other inlet of the ejector pump are connected to the oil supply pipeline after being connected through a pipeline arranged in the integrated oil supply and delivery device housing.

[0007] Furthermore, the pipeline in the housing of the integrated oil supply and delivery device is composed of a fluid channel and a chamber inside the housing of the integrated oil supply and delivery device.

[0008] Furthermore, the jet pump is arranged on the surface of the integrated oil supply and delivery device housing, the jet inlet of the jet pump is connected to the oil supply pipeline through the pipeline in the integrated oil supply and delivery device housing; the drainage inlet of the jet pump is connected to the oil delivery pipeline.

[0009] Furthermore, it also includes a one-way valve at the inlet of the jet pump, the inlet of the one-way valve at the inlet of the jet pump is connected to the oil supply pipeline, and the outlet of the one-way valve at the inlet of the jet pump is connected to the jet inlet of the jet pump; the one-way valve at the inlet of the jet pump is integrated in the housing of the integrated oil supply device.

[0010] Furthermore, the oil inlet of the oil pipeline is arranged at the bottom of the oil storage tank.

[0011] Furthermore, it also includes a boost pump unit outlet check valve, which is integrated in the pipeline of the integrated oil supply and delivery device shell and is specifically arranged outside the outlet of the boost pump unit. The inlet of the boost pump unit outlet check valve is connected to the outlet of the boost pump unit, and the outlet of the boost pump unit outlet check valve is connected to the oil supply pipeline.

[0012] Furthermore, the boost pump unit adopts a centrifugal pump driven by a brushless motor. An impeller sensor and a fault detection module are provided in the boost pump unit. The fault detection module determines whether the boost pump unit is faulty by collecting the signal from the impeller sensor. When the rotation speed is lower than a set value, the fault detection module outputs a fault alarm signal.

[0013] Furthermore, the booster pump unit includes at least two booster pumps connected in parallel, and the booster pumps are detachably mounted at a mounting opening at the bottom of the housing of the integrated oil supply and delivery device.

[0014] Furthermore, it also includes a suction oil supply valve. An oil inlet connected to the internal pipeline is provided on the bottom side of the integrated oil supply and delivery device shell, and the oil inlet is directly connected to the oil supply pipeline through a low-resistance fluid channel; the suction oil supply valve is integrated in the oil inlet of the integrated oil supply and delivery device shell.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1. The present invention functionally integrates the various scattered components of the original oil supply and delivery device into one device, thereby realizing the normal oil supply and delivery function, reducing the number of components, reducing the weight of the oil supply and delivery device, and reducing the maintenance cost caused by regular replacement of rubber pipelines.

[0017] 2. The present invention integrates the structures that need to be disassembled and maintained on the outside of the shell, and designs the flow channels of the structures that do not need to be disassembled and maintained inside the shell, so that the maintenance performance of the integrated structure is not reduced due to integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the implementation method of the patent of the present invention, the following is a brief introduction to the drawings required for use in the implementation method. It should be understood that the following drawings only show certain embodiments of the patent of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a schematic diagram of the principle structure of a traditional oil supply and transportation device.

[0020] Among them: 1-1. Booster pump, 1-2. Booster pump outlet check valve, 1-3. Oil supply pipeline, 1-4. Four-way joint; 1-5. Low pressure signal device, 1-6. Engine inlet, 1-7. Injection pump inlet check valve, 1-8. Injection pipeline, 1-9. Oil storage tank, 1-10. Injection pump; 1-11. Accessory mounting plate; 1-12. Oil supply tank, 1-13. Oil delivery pipeline;

[0021] Figure 2 It is a schematic diagram of the principle structure of the integrated oil supply and transportation device;

[0022] Figure 3 It is a schematic diagram of the structure of the integrated oil supply and transportation device;

[0023] In the figure: 1 - boost pump unit, 2 - suction oil supply valve, 3 - boost pump unit outlet check valve, 4 - ejector pump inlet check valve, 5 - ejector pump, 6 - integrated oil supply device housing, 7 - engine inlet, 8 - oil pipeline, 9 - oil storage tank, 10 - oil supply tank. DETAILED DESCRIPTION

[0024] This section is an embodiment of the present invention, which is used to explain and illustrate the technical solution of the present invention. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships as given in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or case 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", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0026] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be interpreted in a broad sense, for example, it can be a fixed connection, a detachable connection or an integrated connection; it can be a mechanical connection or a point connection; it can be a direct connection or a connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0027] Embodiment 1:

[0028] A helicopter integrated oil supply and delivery device comprises a booster pump unit 1 and an ejector pump 5 integrated on an integrated oil supply and delivery device housing 6, the integrated oil supply and delivery device housing 6 is arranged in an oil supply tank 10, the top of the integrated oil supply and delivery device housing 6 is connected to an engine inlet 7 via an oil supply pipeline 11; an inlet of the ejector pump 5 is connected to an oil storage tank 9 via an oil connection pipeline 8; the inlet of the booster pump unit 1 is arranged outside the integrated oil supply and delivery device housing 6; the outlet of the booster pump unit 1 and the other inlet of the ejector pump 5 are connected to the oil supply pipeline 11 after being connected via a pipeline arranged in the integrated oil supply and delivery device housing 6.

[0029] The pipelines in the integrated oil supply and delivery device housing 6 are composed of fluid channels and chambers inside the integrated oil supply and delivery device housing 6 .

[0030] The jet pump 5 is arranged on the surface of the integrated oil supply and delivery device housing 6 , and the jet inlet of the jet pump 5 is connected to the oil supply pipeline 11 through the pipeline in the integrated oil supply and delivery device housing 6 ; the drainage inlet of the jet pump 5 is connected to the oil delivery pipeline 8 .

[0031] It also includes a one-way valve 4 at the inlet of the jet pump, the inlet of which is connected to the oil supply pipeline 11, and the outlet of which is connected to the jet inlet of the jet pump 5; the one-way valve 4 at the inlet of the jet pump is integrated in the housing 6 of the integrated oil supply device.

[0032] The oil inlet of the oil delivery pipeline 8 is arranged at the bottom of the oil storage tank 9.

[0033] It also includes a boost pump unit outlet one-way valve 3, which is integrated in the pipeline of the integrated oil supply device housing 6 and is specifically arranged outside the outlet of the boost pump unit 1. The inlet of the boost pump unit outlet one-way valve 3 is connected to the outlet of the boost pump unit 1, and the outlet of the boost pump unit outlet one-way valve 3 is connected to the oil supply pipeline 11.

[0034] The boost pump unit 1 adopts a centrifugal pump driven by a brushless motor. An impeller sensor and a fault detection module are provided in the boost pump unit 1. The fault detection module determines whether the boost pump unit 1 is faulty by collecting the signal of the impeller sensor. When the rotation speed is lower than a certain set value, the fault detection module outputs a fault alarm signal.

[0035] The booster pump unit 1 includes at least two booster pumps connected in parallel, and the booster pumps are detachably mounted at a mounting opening at the bottom of the housing 6 of the integrated oil supply and delivery device.

[0036] It also includes an oil suction supply valve 2. An oil inlet connected to the internal pipeline is provided on the bottom side of the integrated oil supply device shell 6. The oil inlet is directly connected to the oil supply pipeline 11 through a low-resistance fluid channel; the oil suction supply valve 2 is integrated in the oil inlet of the integrated oil supply device shell 6.

[0037] Embodiment 2:

[0038] A new integrated oil supply and delivery device can realize all the functions of the oil supply and delivery device components using the original technology. The function of the boost pump is to provide pressurized fuel to the engine and provide an injection source to the injection pump. The function of the one-way valve at the outlet of each boost pump is to prevent the fuel from flowing back into the fuel tank from the inoperative boost pump. The injection pump is used to deliver oil to the fuel tank, and its inlet one-way valve prevents the engine from sucking air from the empty fuel tank. The low-pressure signal device in the oil supply pipeline is used to monitor the working status of the boost pump and output a fault alarm signal. Each oil supply pipeline serves as a flow channel for the oil.

[0039] The present invention integrates the above functions into one device, and the oil supply and delivery requirements can be met by only installing the device at the bottom of the oil tank. The device has a raised shell, and two booster pump units, three one-way valves, and one suction and oil supply valve are integrated inside. An ejector pump is installed outside the shell. A one-way valve is installed at the outlet of each booster pump unit, and the pressurized oil is divided into two parts after being gathered. One part flows to the outlet of the oil supply and delivery device to be supplied to the engine, and the other part flows to the ejector pump nozzle after passing through the one-way valve at the inlet of the ejector pump. Negative pressure is generated at the oil suction port of the ejector pump to suck the fuel in the oil storage tank into the ejector pump and discharge it into the oil supply tank through its diffusion port. A suction and oil supply valve is installed on the manifold of the oil channel flowing to the outlet of the oil supply and delivery device to realize the function of reducing the flow resistance of the device when the engine is sucking. The booster pump unit can perform self-detection inside, and the fault signal can be directly output without the need for an additional low-pressure signal device.

[0040] Embodiment 3:

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0042] The integrated oil supply and delivery device is composed of a booster pump unit 1, a suction oil supply valve 2, a one-way valve 3 at the outlet of the booster pump unit, a one-way valve 4 at the inlet of the ejector pump, an ejector pump 5 and a housing 6 of the integrated oil supply and delivery device. The housing 6 is designed to be a variety of fluid channels and installation spaces for each unit, and is installed in the form of a flange. The booster pump unit 1 uses a centrifugal pump driven by a brushless motor. When replacing the unit, it is not necessary to release the remaining fuel in the tank. The booster pump unit has a self-detection function, which determines whether the booster pump is faulty by detecting the speed of the impeller. When the speed is lower than a certain set value, a fault alarm signal is output, which can replace the traditional low-pressure signal device for booster pump fault detection. A one-way valve 3 is installed at the outlet of the booster pump unit 1. When there is no pressure, the valve is closed under the action of the spring force. When the booster pump unit 1 is connected to work, the valve 3 opens and the oil channel opens. When only one boost pump unit 1 is working and the oil flows to the one-way valve 3 at the outlet of another boost pump unit, the valve is closed under the action of hydraulic force and spring force, which can prevent the oil from the non-working boost pump from flowing back to the fuel tank. The pressurized fuel is divided into three paths after passing through the one-way valve 3. One path flows to the priming pump 5 installed on the housing 6 of the oil supply device through the one-way valve 4 at the inlet of the priming pump, and the fuel in the oil storage tank 9 is sucked into the oil supply tank 10 by the priming pump 5 through the oil delivery pipeline 8. The one-way valve 4 at the inlet of the priming pump is used to prevent the engine from sucking in air from the oil storage tank when the oil storage tank is empty. One path of fuel flows to the engine inlet 7 to be supplied to the engine. One path flows to the suction and supply valve 2, and the fuel in the oil supply tank 10 is directly sucked from this valve when the engine is sucking and supplying oil, so as to reduce the flow resistance of the pipeline.

[0043] When both boost pump units 1 are connected, the fuel in the fuel supply tank is pressurized and supplied to the engine inlet through the one-way valve 3. When the inlet flow rate is 510L / h, the pressure is not less than 100kPa. At the same time, a part of the pressurized fuel flows to the nozzle in the jet pump through the one-way valve 4 as the ejection source of the ejector pump 5, generating negative pressure near the nozzle, sucking the fuel in the fuel storage tank into the ejector pump 5 through the oil pipeline, and discharged into the fuel supply tank through the jet pump diffuser, realizing the oil delivery function of the integrated oil supply device. The ejector pump oil delivery flow rate is greater than the maximum engine consumption flow rate of 510L / h.

[0044] When a booster pump unit 1 fails, the unit outputs a fault signal. The other booster pump unit boosts the fuel in the fuel tank and flows to the engine and the ejector pump 5 through the outlet one-way valve 3. The outlet valve 3 of the inoperative booster pump unit is closed under the pressure of the working booster pump unit and the elastic force of the spring at the valve, and the fuel will not flow back to the fuel tank. The performance of one booster pump unit can meet the requirements of the engine fuel supply and the ejector pump.

[0045] When both boost pump units 1 fail, the engine suction function is used to directly suck the fuel from the fuel supply tank into the engine through the suction supply valve 2. Suctioning the fuel from this valve ensures very small local pressure loss in the pipeline, which can be less than 7 kPa at a flow rate of 510 l / h.

Claims

1. A helicopter integrated oil supply and delivery device, characterized in that: The invention comprises a booster pump unit (1) and an ejector pump (5) integrated on an integrated oil supply and delivery device housing (6); the integrated oil supply and delivery device housing (6) is arranged in an oil supply tank (10); the top of the integrated oil supply and delivery device housing (6) is connected to an engine inlet (7) via an oil supply pipeline (11); an inlet of the ejector pump (5) is connected to an oil storage tank (9) via an oil connection pipeline (8); an inlet of the booster pump unit (1) is arranged outside the integrated oil supply and delivery device housing (6); an outlet of the booster pump unit (1) and another inlet of the ejector pump (5) are connected via a pipeline arranged in the integrated oil supply and delivery device housing (6) and then connected to the oil supply pipeline (11).

2. The helicopter integrated oil supply and delivery device according to claim 1, characterized in that: The pipeline in the integrated oil supply and delivery device housing (6) is composed of a fluid channel and a chamber inside the integrated oil supply and delivery device housing (6).

3. The helicopter integrated oil supply and delivery device according to claim 2, characterized in that: The jet pump (5) is arranged on the surface of the integrated oil supply and delivery device housing (6); the jet inlet of the jet pump (5) is connected to the oil supply pipeline (11) through the pipeline in the integrated oil supply and delivery device housing (6); and the drainage inlet of the jet pump (5) is connected to the oil delivery pipeline (8).

4. The helicopter integrated oil supply and delivery device according to claim 3, characterized in that: It also includes a one-way valve (4) at the inlet of the jet pump, the inlet of which is connected to the oil supply pipeline (11), and the outlet of which is connected to the jet inlet of the jet pump (5); the one-way valve (4) at the inlet of the jet pump is integrated in the housing (6) of the integrated oil supply device.

5. The helicopter integrated oil supply and delivery device according to claim 1, characterized in that: The oil inlet of the oil delivery pipeline (8) is arranged at the bottom of the oil storage tank (9).

6. The helicopter integrated oil supply and delivery device according to claim 2, characterized in that: It also includes a booster pump unit outlet check valve (3), which is integrated in the pipeline of the integrated oil supply and delivery device housing (6), and is specifically arranged outside the outlet of the booster pump unit (1), the inlet of the booster pump unit outlet check valve (3) is connected to the outlet of the booster pump unit (1), and the outlet of the booster pump unit outlet check valve (3) is connected to the oil supply pipeline (11).

7. The helicopter integrated oil supply and delivery device according to claim 1, characterized in that: The booster pump unit (1) adopts a centrifugal pump driven by a brushless motor. An impeller sensor and a fault detection module are provided in the booster pump unit (1). The fault detection module determines whether the booster pump unit (1) is faulty by collecting a signal from the impeller sensor. When the rotation speed is lower than a certain set value, the fault detection module outputs a fault alarm signal.

8. The helicopter integrated oil supply and delivery device according to claim 1, characterized in that: The booster pump unit (1) comprises at least two booster pumps connected in parallel, and the booster pumps are detachably mounted at a mounting opening at the bottom of a housing (6) of an integrated oil supply and delivery device.

9. The helicopter integrated oil supply and delivery device according to claim 2, characterized in that: It also includes an oil suction supply valve (2); an oil inlet connected to the internal pipeline is provided on the bottom side of the integrated oil supply device housing (6); the oil inlet is directly connected to the oil supply pipeline (11) through a low-resistance fluid channel; the oil suction supply valve (2) is integrated in the oil inlet of the integrated oil supply device housing (6).

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