Multi-tube oil supply device variable back pressure flow calibrator

Abstract

The present application relates to a kind of multi-tube oil feeder variable back pressure flow calibrator, including calibrator body, flowmeter (3), flow tube (2), back pressure control pump (6), oil-gas filter (7), back pressure pipe (8), oil supply pump (12), oil filter (13);Calibrator body is divided into calibrator body upper cover (4) and calibrator body lower seat (10) two parts, simultaneously with internal oil supply pipe (14) to provide oil system for the measured multi-tube oil feeder (1) with external oil supply pipe (9), oil supply pump (12), oil filter (13) and oil (11), to provide target back pressure for the measured multi-tube oil feeder with back pressure control pump (6) combined with oil-gas filter (7) and back pressure pipe (8) constitute back pressure system, to provide flow measurement for the measured multi-tube oil feeder with flowmeter (3) and flow tube (2) constitute measurement system, and then realize the goal of synchronous rapid measurement of variable back pressure multi-tube flow for the multi-tube oil feeder used in aviation unmanned aerial vehicle micro combustion engine and other power equipment.

Description

Technical Field

[0001] This invention belongs to the field of high-end equipment manufacturing, and specifically relates to a multi-pipe oil supply variable back pressure flow calibrator. Background Technology

[0002] In the field of high-end equipment manufacturing technology, represented by unmanned aerial vehicles (UAVs), there are comprehensive requirements for power systems to increase output capacity, reduce energy loss, and decrease size and weight, thus bringing considerable attention to aerospace micro-gas turbines. Among aerospace micro-gas turbines, multi-tube fuel injectors have received widespread attention due to their advantages in size, weight, and cost.

[0003] However, as a simple, thin-walled component with multiple interconnected pipes, the multi-pipe fuel supply device is prone to local pipe blockage during processing due to welding, impacts, and other reasons. This can lead to increased fuel supply deviations in each pipe and affect the stable operation of the micro-engine.

[0004] Existing heavy-duty engines typically use experimental systems, which are costly and time-consuming, and are not suitable for measuring multi-pipe fuel injectors in micro aero engines, and are difficult to modify.

[0005] Currently, engineers typically use visual inspection of oil volume while the system is in operation to determine if there is blockage in some pipes of a multi-pipe system. However, this method has several drawbacks. First, its measurement accuracy is low and it cannot calibrate mild to moderate pipe problems. Second, this method is mostly performed under atmospheric conditions and cannot accurately simulate the working state of the fuel dispenser. Furthermore, given the current research needs for multi-pipe flow measurement, the previously used method of measuring each pipe in turn suffers from slow measurement speed and significant fuel waste. Summary of the Invention

[0006] This invention provides a variable back pressure and flow calibrator for a multi-tube oiler, which overcomes the shortcomings of the prior art and realizes back pressure adjustment and multi-tube flow measurement of the multi-tube oiler under test in a closed environment.

[0007] To address the above technical problems, this invention provides a multi-tube fuel injector variable back pressure flow calibrator, characterized by comprising a calibrator body, a fuel supply system, a back pressure system, a measurement system, and a pressure and level monitoring component; the calibrator body is a sealed pressure-bearing cavity structure, internally containing fuel 11; the fuel supply system is used to supply fuel to the multi-tube fuel injector 1 under test; the back pressure system is used to adjust the internal air pressure of the calibrator body to simulate back pressure under different operating conditions; the measurement system is used to simultaneously measure the flow rate at each outlet of the multi-tube fuel injector 1 under test; and the pressure and level monitoring component is used to display the internal pressure and fuel level in real time.

[0008] Furthermore, the calibrator body includes a calibrator body upper cover 4, a calibrator body lower seat 10, and an upper cover and lower seat sealing ring 5; the upper cover 4 and the lower seat 10 are fixed by threaded locking, and the sealing ring 5 achieves end face sealing, forming a pressure-resistant and airtight cavity with no overall leakage.

[0009] Furthermore, the oil supply system includes an external oil supply pipe 9, an oil supply pump 12, an oil filter 13, and an internal oil supply pipe 14; the oil supply pump 12 draws oil from the calibrator body, filters it through the oil filter 13, and then sends it to the multi-pipe oil supply device 1 under test through the internal and external oil supply pipes to form a closed-loop oil supply.

[0010] Furthermore, the back pressure system includes a back pressure control pump 6, a back pressure pipe 8, and an oil and gas filter 7 connected in sequence; the back pressure control pump 6 adjusts the air pressure inside the calibrator body through the back pressure pipe 8.

[0011] Furthermore, the measurement system includes multiple sets of flow measuring tubes 2 and flow meters 3 corresponding to the number of oil outlets of the multi-tube oiler; each set of flow measuring tubes 2 is independently connected to one oil outlet, and all flow meters 3 synchronously collect flow data to achieve parallel and simultaneous measurement of multiple tubes.

[0012] Furthermore, the flow meter 3 is a miniature high-precision flow meter, installed on the top cover 4 of the calibrator body, with the flow measuring tube 2 directly inserted above the fuel level, resulting in no pressure loss during backflow.

[0013] Furthermore, the pressure and level monitoring component includes a cavity pressure sensor, a fuel level sensor, and a digital display instrument, which monitors and displays the internal back pressure and fuel level in real time.

[0014] Furthermore, the multi-tube oil supply device 1 to be tested is installed outside the calibrator body, with its oil inlet connected to the external oil supply pipe 9, and each oil outlet sealed and connected to the corresponding flow measuring pipe 2, forming an external clamping and internal closed-loop test structure.

[0015] Furthermore, the back pressure control pump 6 is a bidirectional controllable pump, capable of pressurizing or depressurizing.

[0016] Furthermore, the oil supply pump 12 is in constant flow or constant pressure oil supply mode.

[0017] Beneficial effects: The calibrator body of this invention is divided into two parts: the upper cover 4 and the lower seat 10 of the calibrator body. The airtightness of the calibrator body is maintained by the sealing ring 5. At the same time, the oil supply system composed of the external oil supply pipe 9, the oil supply pump 12, the oil filter 13 and the internal oil supply pipe 14 provides oil 11 to the multi-pipe oiler 1 under test. The back pressure control pump 6 combined with the oil-gas filter 7 and the back pressure pipe 8 forms a back pressure system to provide the target back pressure to the multi-pipe oiler under test. The flow meter 3 and the flow measuring pipe 2 form a measurement system to measure the flow of the multi-pipe oiler under test. Thus, it realizes the synchronous and rapid measurement of multi-pipe flow with variable back pressure for multi-pipe oilers used in power equipment such as micro gas turbines for aviation UAVs, filling the measurement gap in the field of multi-pipe oilers for micro aero engines, realizing multi-pipe parallel measurement, low cost, high precision measurement, and mass application. Attached Figure Description

[0018] Figure 1 Schematic diagram of the invention Figure 2 A schematic diagram of the structure of this invention (without reference numerals). Detailed Implementation

[0019] To make the objectives, contents, and advantages of the present invention clearer, the specific embodiments of the present invention will be described in further detail below.

[0020] like Figure 1 The diagram shows the location of the relief groove (partial), the projection method of the top blade, the basic groove shape and constraint dimensions of the relief groove (expanded), and the shape of the multi-pipe oil supply variable back pressure flow calibrator based on the equal width relief groove (expanded) of the rectangular top blade.

[0021] The present invention proposes a multi-pipe oiler variable back pressure flow calibrator, comprising a calibrator body, an oil supply system, a back pressure system, a pressure and liquid level monitoring component, and a measurement system; The calibrator body is a sealed space containing fuel. The fuel supply system provides fuel to the multi-tube fuel injector 1 under test, the back pressure system provides target back pressure to the multi-tube fuel injector under test, and the measurement system performs flow measurement. The calibrator body includes a calibrator body upper cover 4 and a calibrator body lower seat 10, which are locked together by a threaded structure. A sealing ring 5 seals the connection of the calibrator body, providing a working environment and physical support for the oil supply system, back pressure system and measurement system. The oil supply system includes an external oil supply pipe 9, an oil supply pump 12, an oil filter 13, and an internal oil supply pipe 14. The oil 11 inside the calibrator body is filtered by the oil filter 13 under the drive of the oil supply pump 12 and then enters the external oil supply pipe 9 through the internal oil supply pipe 14, and is finally injected into the multi-pipe oil supply device 1 to be tested. The back pressure system is installed on the side wall of the calibrator body and includes a back pressure control pump 6, a back pressure pipe 8 and an oil and gas filter 7 connected in sequence. During operation, the back pressure control pump 6 controls the air to enter or flow out of the calibrator body through the back pressure pipe 8 and adjusts the internal measurement back pressure of the calibrator body to achieve a continuously adjustable back pressure of 1.5 to 1.8 MPa. The oil and gas filter 7 filters the inlet and outlet working fluid. The measurement system, installed on the top of the calibrator body, includes a flow meter 3 and a flow measuring tube 2. During operation, the oil 11 inside the multi-tube oil supply device 1 under test re-enters the calibrator body through the flow measuring tube 2, and the flow rate is read by the flow meter 3 at the same time. The oil from the multi-tube outlet is synchronously measured by the corresponding flow measuring tube and the flow meter, realizing multi-tube synchronization, variable back pressure, high precision, and fast calibration. The connecting hoses and other consumable auxiliary mechanisms between the multi-pipe oil supply device 1 under test and the flow measuring pipe 2, between the multi-pipe oil supply device 1 under test and the external oil supply pipe 9, and between the oil supply pump 12 and the external oil supply pipe 9 are mainly used to achieve tight connection between components. The pressure level monitoring component is used to measure and display the oil level and air back pressure inside the calibrator body.

[0022] The present invention is implemented as follows: 1. Fabricate the upper cover 4 and the lower seat 10 of the calibrator body, lock them with a threaded structure and seal them with a sealing ring 5 at the connection, so as to provide a working environment and physical support for the oil supply system, back pressure system and measurement system; 2. An oil supply system including an external oil supply pipe 9, an oil supply pump 12, an oil filter 13 and an internal oil supply pipe 14 is installed near the bottom of the calibrator body base 10; 3. A back pressure system, including a back pressure control pump 6 combined with an oil and gas filter 7 and a back pressure pipe 8, is installed near the top of the calibrator body's lower seat 10. 4. Install a measurement system containing a flow meter 3 and a flow measuring tube 2 on the top of the calibrator body cover 4; 5. During operation, first connect the external oil supply pipe 9 to the oil inlet of the multi-pipe oil supply device 1 under test using the auxiliary connection structure; 6. Secondly, the auxiliary connection structure connects the flow measuring tube 2 to the oil outlet of the multi-tube oil supply device 1 to be tested; 7. Next, turn the oil supply pump to the standby power; 8. Then, adjust the back pressure system to the specified back pressure; 9. Finally, turn on the oil supply pump to its working power, calibrate the flow rate of each pipe, and determine whether the multi-pipe oil supply device is qualified based on the flow meter data.

[0023] This invention features a compact structure, good sealing performance, continuously adjustable back pressure, and multi-pipe parallel measurement, making it suitable for factory testing, performance calibration, and fault diagnosis of micro-gas turbine multi-pipe fuel supply systems for aviation unmanned aerial vehicles (UAVs).

[0024] The above description is only a preferred embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A multi-pipe oil supply variable back pressure flow calibrator, characterized in that, The device includes a calibrator body, a fuel supply system, a back pressure system, a measurement system, and a pressure and level monitoring component. The calibrator body is a sealed pressure-bearing cavity structure containing fuel (11). The fuel supply system is used to supply fuel to the multi-tube fuel injector (1) under test. The back pressure system is used to adjust the air pressure inside the calibrator body to simulate back pressure under different working conditions. The measurement system is used to simultaneously measure the flow rate of each outlet of the multi-tube fuel injector (1) under test. The pressure and level monitoring component is used to display the pressure and fuel level inside the cavity in real time.

2. The calibrator according to claim 1, characterized in that, The calibrator body includes a calibrator body upper cover (4), a calibrator body lower seat (10), and an upper cover and lower seat sealing ring (5); the upper cover (4) and the lower seat (10) are fixed by threaded locking, and the sealing ring (5) achieves end face sealing, forming a pressure-resistant and airtight cavity with no leakage.

3. The calibrator according to claim 1, characterized in that, The oil supply system includes an external oil supply pipe (9), an oil supply pump (12), an oil filter (13), and an internal oil supply pipe (14). The oil supply pump (12) draws oil from the calibrator body, filters it through the oil filter (13), and then sends it to the multi-pipe oil supply device (1) under test through the internal and external oil supply pipes to form a closed-loop oil supply.

4. The calibrator according to claim 1, characterized in that, The back pressure system includes a back pressure control pump (6), a back pressure pipe (8), and an oil and gas filter (7) connected in sequence; the back pressure control pump (6) adjusts the air pressure inside the calibrator body through the back pressure pipe (8).

5. The calibrator according to claim 1, characterized in that, The measurement system includes multiple sets of flow measuring tubes (2) and flow meters (3) corresponding to the number of oil outlets of the multi-tube oiler; each set of flow measuring tubes (2) is independently connected to an oil outlet, and all flow meters (3) collect flow data synchronously to realize parallel and simultaneous measurement of multiple tubes.

6. The calibrator according to claim 5, characterized in that, The flow meter (3) is a miniature high-precision flow meter, which is installed on the top cover (4) of the calibrator body. The flow measuring tube (2) is directly inserted above the fuel liquid surface, and there is no pressure loss during backflow.

7. The calibrator according to claim 1, characterized in that, The pressure and level monitoring component includes a cavity pressure sensor, a fuel level sensor, and a digital display instrument, which monitors and displays the internal back pressure and fuel level in real time.

8. The calibrator according to claim 1, characterized in that, The multi-tube oil supply device (1) to be tested is installed outside the calibrator body. Its oil inlet is connected to the external oil supply pipe (9), and each oil outlet is sealed to the corresponding flow measuring pipe (2) to form an external clamping and internal closed-loop test structure.

9. The calibrator according to claim 4, characterized in that, The back pressure control pump (6) is a bidirectional controllable pump that can pressurize or depressurize.

10. The calibrator according to claim 3, characterized in that, The oil supply pump (12) is in constant flow or constant pressure oil supply mode.

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