Flow closed-loop control electric fuel pump with compact space

Abstract

The utility model provides a flow closed-loop control electric fuel pump with a compact space, which relates to the technical field of fuel pumps and comprises a shell, an inlet pipe joint is fixedly mounted on the left side of the shell, an internal gear pump is fixedly mounted on the right side of the inlet pipe joint, and a direct-current brushless motor is fixedly mounted on the right side of the internal gear pump. A fuel flow measuring device is fixedly installed on the right side of the direct-current brushless motor, a better using effect is achieved, in the using process, the fuel flow measuring device arranged in an oil pipe is adopted, fuel flow closed-loop control is integrated in the electric fuel pump, fuel flow closed-loop control of the electric fuel pump is achieved, and the fuel flow control efficiency is improved. The control effect of the fuel flow is guaranteed, and therefore the situation that when an existing electric fuel pump is used, the fuel flow is represented through rotating speed data of the electric fuel pump, direct measurement control is not conducted on the fuel flow, and only closed-loop control is conducted on the rotating speed of the electric fuel pump so that the corresponding calibrated flow can be achieved is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel pumps, in particular to a flow closed-loop controlled electric fuel pump with compact space. Background Art

[0002] As aircraft gradually become smaller and more high-performance, the research on electric fuel pumps is also one of the important development directions. Electric fuel pumps are responsible for the fuel pressurization and metering of the engine. The accuracy and stability of fuel flow directly affect the performance of the engine. Unstable fuel flow can cause too much or too little oil in the engine fuel chamber, causing unstable combustion. Especially when the aircraft engine is in the starting stage, unstable fuel supply may cause lean or rich suspension, causing engine start failure. The accuracy and fluctuation of fuel flow are related to the gear pump design, motor control, and metering method of the fuel pump. As the main component of the modern aircraft engine fuel supply system, the electric fuel pump plays an important role in the control of the aircraft engine. Its control performance and output accuracy directly affect the power performance of the aircraft engine and even the entire aircraft. However, the current fuel flow of electric fuel pumps is mostly measured by calibration method, that is, before the electric fuel pump leaves the factory, the fuel flow is calibrated at different speeds under certain working conditions to obtain the speed-flow characteristic curve. When the electric fuel pump is in use, the fuel flow rate is represented by the electric fuel pump speed data. The fuel flow rate is not directly measured and controlled. Only the electric fuel pump speed is closed-loop controlled to achieve the corresponding calibrated flow rate. This is less practical and needs to be improved. Utility Model Content

[0003] The purpose of the utility model is to solve the technical problems raised in the above background technology.

[0004] The utility model adopts the following technical scheme: a flow closed-loop controlled electric fuel pump with compact space, comprising a shell, an inlet pipe joint is fixedly installed on the left side of the shell, an internal gear pump is fixedly installed on the right side of the inlet pipe joint, a DC brushless motor is fixedly installed on the right side of the internal gear pump, a fuel flow measuring device is fixedly installed on the right side of the DC brushless motor, an electronically controlled fuel pump control module is fixedly installed inside the shell, an outlet pipe joint is fixedly installed on the surface of the shell, and a fuel pipeline is fixedly installed on the back side of the outlet pipe joint.

[0005] Preferably, the inlet pipe joint is fixedly mounted at the left center of the shell, so that it is more convenient for the staff to connect the pipeline with the inlet pipe joint.

[0006] Preferably, the fuel flow rate measuring device is fixedly mounted on the right side of the DC brushless motor, so that it is more convenient to measure the flow rate of the fuel during use.

[0007] Preferably, the electronic fuel pump control module evenly covers the internal gear pump and the DC brushless motor, which makes it easier to control the fuel pump.

[0008] Preferably, the outlet pipe joint is fixedly mounted on the right side of the surface of the shell. Here, it is more convenient for the staff to connect the pipeline with the outlet pipe joint.

[0009] Preferably, the end of the fuel pipeline away from the outlet pipe joint is fixedly installed on the right side of the fuel flow measurement device. Here, it is more convenient to transport the fuel.

[0010] Compared with the prior art, the advantages and positive effects of the utility model are:

[0011] The utility model achieves better use effect by arranging an inlet pipe joint, an internal gear pump, a DC brushless motor, a fuel flow measuring device, an electronically controlled fuel pump control module, an outlet pipe joint and a fuel pipeline. During use, a fuel flow measuring device placed inside the oil pipe is used to integrate the fuel flow closed-loop control with the electric fuel pump, thereby achieving the fuel flow closed-loop control of the electric fuel pump and ensuring the control effect of the fuel flow. This avoids the situation in which, when the existing electric fuel pump is used, the fuel flow size is characterized by the electric fuel pump speed data, the fuel flow is not directly measured and controlled, and only the electric fuel pump speed is closed-loop controlled to achieve the corresponding calibrated flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 A schematic diagram of a flow closed-loop controlled electric fuel pump with compact space is provided for the utility model;

[0013] Figure 2 The utility model provides an explosion diagram of a flow closed-loop controlled electric fuel pump with compact space.

[0014] Legend:

[0015] 1. Shell; 2. Inlet pipe joint; 3. Internal gear pump; 4. DC brushless motor; 5. Fuel flow measurement device; 6. Electronic fuel pump control module; 7. Outlet pipe joint; 8. Fuel pipeline. DETAILED DESCRIPTION

[0016] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0017] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0018] Embodiment 1

[0019] See also Figure 1-2 The utility model provides a technical solution: a space-compact flow closed-loop control electric fuel pump, comprising a shell 1, an inlet pipe joint 2 is fixedly installed on the left side of the shell 1, an internal gear pump 3 is fixedly installed on the right side of the inlet pipe joint 2, a DC brushless motor 4 is fixedly installed on the right side of the internal gear pump 3, a fuel flow measuring device 5 is fixedly installed on the right side of the DC brushless motor 4, an electronic fuel pump control module 6 is fixedly installed inside the shell 1, an outlet pipe joint 7 is fixedly installed on the surface of the shell 1, and a fuel pipeline 8 is fixedly installed on the back of the outlet pipe joint 7. By setting the inlet pipe joint 2, the internal gear pump 4, the fuel flow measuring device 5 is fixedly installed on the right side of the internal gear pump 3, and the fuel flow measuring device 5 is fixedly installed on the right side of the DC brushless motor 4. The invention relates to a gear pump 3, a brushless DC motor 4, a fuel flow measuring device 5, an electronically controlled fuel pump control module 6, an outlet pipe joint 7 and a fuel pipeline 8, so as to achieve a better use effect. During use, the fuel flow measuring device 5 placed inside the oil pipe is used to integrate the fuel flow closed-loop control into the electric fuel pump, so as to achieve the fuel flow closed-loop control of the electric fuel pump and ensure the control effect of the fuel flow, thereby avoiding the situation that when the existing electric fuel pump is used, the fuel flow size is represented by the speed data of the electric fuel pump, the fuel flow is not directly measured and controlled, and only the speed of the electric fuel pump is closed-loop controlled. In order to achieve the corresponding calibrated flow rate, the inlet pipe joint 2 is fixedly installed at the center of the left side of the shell 1, which is more convenient for the staff to connect the pipeline with the inlet pipe joint 2, and prevent the inconvenience of connection caused by the biased position of the inlet pipe joint 2 during use. The fuel flow measuring device 5 is fixedly installed on the right side of the DC brushless motor 4, which is more convenient to measure the flow rate of the fuel during use, and avoid the situation that the fuel flow rate is too fast and cannot meet the use requirements during use. The electronic fuel pump control module 6 evenly covers the internal gear pump 3 and the DC brushless motor 4, which is more convenient to control the oil pump, and prevents the situation that the fuel flow rate is too fast due to the inability to control the oil pump during use. The outlet pipe joint 7 is fixedly installed on the right side of the surface of the shell 1, which is more convenient for the staff to connect the pipeline with the outlet pipe joint 7, and avoids the inconvenience of connection caused by the biased position of the outlet pipe joint 7 during use. The end of the fuel pipeline away from the outlet pipe joint 7 is fixedly installed on the right side of the fuel flow measuring device 5, which is more convenient for fuel transportation, and prevents the situation that the fuel pipeline is not connected to the fuel flow measuring device 5 during use.

[0020] Working principle: When in use, first fix the housing 1 in the existing position, then connect the pipeline to the inlet pipe joint 2, so that the fuel enters the electric fuel pump from the inlet pipe joint 2, flows through the internal gear pump 3, the fuel flow measurement device 5 and the fuel pipeline 8 in sequence, and finally leaves the electric fuel pump through the outlet pipe joint 7. When the electric fuel pump is working, the DC brushless motor 4 drives the internal gear pump 3 to rotate, and pressurizes the fuel entering the pump; the fuel flow measurement device 5 is set in the fuel pipeline 8 to accurately measure the fuel flow after the internal gear pump 3. The electronic fuel pump control module 6 performs closed-loop PID control on the fuel flow of the electric fuel pump, the controlled quantity is the fuel flow, and the control quantity is the motor speed.

[0021] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A space-compact flow closed-loop controlled electric fuel pump, comprising a housing (1), characterized in that: An inlet pipe joint (2) is fixedly mounted on the left side of the housing (1), an internal gear pump (3) is fixedly mounted on the right side of the inlet pipe joint (2), a DC brushless motor (4) is fixedly mounted on the right side of the internal gear pump (3), a fuel flow measurement device (5) is fixedly mounted on the right side of the DC brushless motor (4), an electronically controlled fuel pump control module (6) is fixedly mounted inside the housing (1), an outlet pipe joint (7) is fixedly mounted on the surface of the housing (1), and a fuel pipeline (8) is fixedly mounted on the back side of the outlet pipe joint (7).

2. The space-compact flow closed-loop controlled electric fuel pump according to claim 1, characterized in that: The inlet pipe joint (2) is fixedly mounted at the center of the left side of the housing (1).

3. The space-compact flow closed-loop controlled electric fuel pump according to claim 1, characterized in that: The fuel flow measurement device (5) is fixedly mounted on the right side of the DC brushless motor (4).

4. The space-compact flow closed-loop controlled electric fuel pump according to claim 1, characterized in that: The electronically controlled fuel pump control module (6) evenly covers the internal gear pump (3) and the DC brushless motor (4).

5. The space-compact flow closed-loop controlled electric fuel pump according to claim 1, characterized in that: The outlet pipe joint (7) is fixedly mounted on the right side of the surface of the housing (1).

6. The space-compact flow closed-loop controlled electric fuel pump according to claim 1, characterized in that: One end of the fuel pipeline (8) away from the outlet pipe joint (7) is fixedly mounted on the right side of the fuel flow measurement device (5).

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