Oil source device with quick response to temperature and flow

Abstract

The invention provides an oil source device capable of rapidly responding to temperature and flow. The oil source device comprises a high-temperature oil way, a low-temperature oil way and an oil supply loop. The oil supply loop, the high-temperature oil way and the low-temperature oil way are jointly connected to one position, and the high-temperature oil supply flow of the high-temperature oil way is jointly determined by the high-temperature oil supply temperature of the high-temperature oil way, the low-temperature oil supply temperature and the low-temperature oil supply flow of the low-temperature oil way and the given lubricating oil temperature and the given lubricating oil flow of the oil supply loop. The high-temperature oil way comprises an oil supply valve, and the opening degree of the oil supply valve corresponds to the high-temperature oil supply flow. The high-temperature oil supply flow can be directly controlled by adjusting the opening degree of the oil supply valve so as to control the temperature of the lubricating oil, and the actual fuel oil and lubricating oil heat exchange process simulation under the transient working condition of a fuel oil icing test can be achieved through rapid temperature and flow response.

Description

Technical Field

[0001] This invention relates to the field of engine fuel and lubricating oil systems, and particularly to an oil source device with rapid temperature and flow response. Background Technology

[0002] Currently, in certain transient operating conditions of aero-engine fuel and lubricating oil systems, such as extremely cold ambient temperatures and extremely low fuel temperatures, during the rapid transition from a small state (such as idle) to a large state (such as takeoff), the fuel flow rate increases nearly tenfold within 5 to 10 seconds. However, due to thermal inertia, the lubricating oil system cannot provide sufficient heat to the cryogenic fuel in such a short time to ensure that the fuel temperature at the outlet of the fuel and lubricating oil radiator remains above 0°C. This can lead to ice crystals in the cryogenic fuel system failing to melt and clogging the filter. Therefore, transient operating conditions are a key factor in fuel icing test evaluation.

[0003] During the transient conditions of fuel freezing tests, the lubricating oil temperature and flow rate change rapidly. Current lubricating oil heat exchange solutions cannot dynamically follow the required engine lubricating oil temperature due to the large thermal inertia of the heating system. Summary of the Invention

[0004] The purpose of this invention is at least to provide an oil source device that has fast dynamic response to flow and temperature, high efficiency, and is also economical.

[0005] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0006] One embodiment of the present invention provides an oil source device with rapid temperature and flow response. The oil source device includes a high-temperature oil circuit, a low-temperature oil circuit, and an oil supply circuit. The oil supply circuit, the high-temperature oil circuit, and the low-temperature oil circuit are connected together. The high-temperature oil supply flow rate of the high-temperature oil circuit is jointly determined by the high-temperature oil supply temperature of the high-temperature oil circuit, the low-temperature oil supply temperature and low-temperature oil supply flow rate of the low-temperature oil circuit, and the given lubricating oil temperature and given lubricating oil flow rate of the oil supply circuit. The high-temperature oil circuit includes an oil supply valve, and the opening degree of the oil supply valve corresponds to the high-temperature oil supply flow rate.

[0007] In some embodiments, the fuel supply circuit includes a fuel heater and a fuel oil radiator. The lubricating oil supplied by the fuel supply circuit exchanges heat with the low-temperature fuel at the fuel heater and the fuel oil radiator. The fuel supply circuit is connected end-to-end with the low-temperature oil circuit to form a circuit. The oil inlet of the low-temperature oil circuit is connected to the oil outlet of the fuel oil radiator.

[0008] In some embodiments, the low-temperature oil circuit is connected to the oil inlet of the oil tank via a first branch, the first branch including a heating component for heating the low-temperature lubricating oil.

[0009] In some embodiments, the heating temperature of the heating component is greater than a given lubricating oil temperature.

[0010] In some embodiments, the inlet and outlet pressure difference of the oil supply valve is constant, so that the opening degree of the oil supply valve corresponds to the high-temperature oil supply flow rate.

[0011] In some embodiments, the inlet end of the high-temperature oil circuit is connected to the outlet end of the oil tank, and the inlet end of the oil supply valve is connected to the inlet end of the oil tank through a second branch. The second branch includes an overflow valve to keep the inlet pressure of the oil supply valve constant. The outlet end of the oil supply valve is connected to the low-temperature oil circuit through a check valve. The check valve is a pressureless check valve to keep the outlet pressure of the oil supply valve constant.

[0012] In some embodiments, the high-temperature circuit includes a high-temperature oil pump, the flow rate of which is greater than a given lubricating oil flow rate.

[0013] In some embodiments, the oil supply circuit includes a metering pump for regulating the lubricating oil flow rate of the oil supply circuit so that the lubricating oil flow rate is equal to a given lubricating oil flow rate.

[0014] This invention relates to a rapid-response oil source device for temperature and flow. By adjusting the opening of the oil supply valve, the high-temperature oil supply flow can be directly controlled to regulate the lubricating oil temperature. The rapid temperature and flow response enables simulation of the actual fuel-lubricating oil heat exchange process under transient conditions in fuel icing tests. By blending high-temperature and low-temperature lubricating oil, the problems of high thermal inertia and slow temperature response in current heating methods are solved. The lubricating oil flow and temperature provided by the oil source device are highly reliable, improving the test efficiency and validity of fuel icing tests while reducing test costs. Attached Figure Description

[0015] The above-described features and advantages of the present invention will be better understood after reading the following detailed description of embodiments of the present disclosure in conjunction with the accompanying drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related properties or features may have the same or similar reference numerals. Wherein:

[0016] Figure 1 This is a schematic diagram of an oil source device based on some embodiments;

[0017] Figure 2 This is a schematic diagram of the oil source device according to some embodiments. Detailed Implementation

[0018] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0019] It should be understood that the terms “system,” “device,” “unit,” and / or “module” used herein are one method of distinguishing different components, elements, parts, sections, or assemblies at different levels. However, if other words can achieve the same purpose, they may be replaced by other expressions.

[0020] Figure 1 This is a schematic diagram of an oil source device based on some embodiments.

[0021] This specification provides an oil source device with rapid temperature and flow response through its embodiments. For example... Figure 1 As shown, the oil supply device includes a high-temperature oil circuit, a low-temperature oil circuit, and a fuel supply circuit. The fuel supply circuit, high-temperature oil circuit, and low-temperature oil circuit are all connected at one point; that is, they converge at a single location. The high-temperature lubricating oil supplied by the high-temperature oil circuit mixes with the low-temperature lubricating oil supplied by the low-temperature oil circuit at this point and is then supplied to the fuel supply circuit. The lubricating oil supplied by the fuel supply circuit is used for heat exchange with the low-temperature fuel, providing sufficient heat to ensure that the fuel temperature at the outlet of the fuel oil radiator remains above 0°C, thus preventing ice crystals from clogging the filter in the low-temperature fuel system.

[0022] Based on the temperature and flow rate of the low-temperature fuel, the required lubricating oil temperature and flow rate for heat exchange can be determined, i.e., given lubricating oil temperature and flow rate. The given lubricating oil temperature T2 and flow rate Q2 are predetermined. The high-temperature oil supply temperature T1 of the high-temperature oil circuit and the low-temperature oil supply temperature T3 of the low-temperature oil circuit can be measured in real time. According to the energy conservation equation Q1T1 + Q3T3 = Q2T2 and the flow rate conservation equation Q3 = Q2 - Q1, the following calculation formula is determined:

[0023]

[0024] The high-temperature oil supply flow rate Q1 is determined by equation (1).

[0025] In some embodiments, the high-temperature oil circuit includes an oil supply valve, which can regulate the high-temperature oil supply flow rate of the high-temperature oil circuit. According to Q=K×A×√ΔP, where Q is the flow rate of the oil supply valve, K is the flow coefficient, A is the valve flow area, and ΔP is the valve inlet-outlet pressure difference, that is, the difference between the pressure at the oil inlet end and the pressure at the oil outlet end of the oil supply valve. Under the condition that ΔP is constant, the valve flow area (i.e., opening degree) of the oil supply valve is in one-to-one correspondence with the high-temperature oil supply flow rate. Therefore, in some embodiments, keeping the inlet-outlet pressure difference of the oil supply valve constant can make the opening degree of the oil supply valve correspond to the high-temperature oil supply flow rate. After adjusting the opening degree of the oil supply valve, the high-temperature oil supply flow rate Q1 can be determined. Combined with the given lubricating oil flow rate Q2, the high-temperature oil supply flow rate Q1, the high-temperature oil supply temperature T1 of the high-temperature oil circuit, and the low-temperature oil supply temperature T3 of the low-temperature oil circuit, the lubricating oil temperature of the oil supply circuit can be determined according to formula (1). At this time, the lubricating oil temperature is consistent with the given lubricating oil temperature Q2. In some embodiments, the lubricating oil flow rate in the oil supply circuit can be adjusted by an existing fixed displacement pump. The rotational speed of the fixed displacement pump is determined according to the given lubricating oil flow rate Q2, thereby achieving rapid adjustment of the lubricating oil flow rate.

[0026] By adjusting the opening of the fuel supply valve, the high-temperature fuel supply flow rate can be directly controlled to regulate the lubricating oil temperature. A fixed-displacement pump controls the lubricating oil flow rate, achieving rapid response in both temperature and flow. This rapid temperature and flow response allows for simulation of the actual fuel-lubricating oil heat exchange process under transient conditions during fuel icing tests. By blending high-temperature and low-temperature lubricating oils, the problems of high thermal inertia and slow temperature response in current heating methods are solved. The fuel supply device provides highly reliable lubricating oil flow and temperature, improving the efficiency and validity of fuel icing tests while reducing testing costs.

[0027] In some embodiments, to ensure the economy of the oil supply device, the oil supply circuit and the cryogenic oil circuit are connected end-to-end to form a loop. The lubricating oil in the oil supply circuit cools down after heat exchange with the cryogenic fuel and can be reused to supply the cryogenic oil circuit for mixing with the high-temperature lubricating oil in the high-temperature oil circuit to produce lubricating oil at the required temperature and flow rate. In some embodiments, the cryogenic oil circuit is connected to the oil tank via a first branch, or the oil supply circuit can be connected to the oil tank via a first branch. Once the high-temperature oil supply flow rate and the lubricating oil flow rate are determined, the cryogenic oil supply flow rate of the cryogenic circuit is limited. A flow difference exists between the cryogenic circuit and the oil supply circuit; excess lubricating oil in the oil supply circuit flows back to the oil tank via the first branch, and the oil tank is used to supply high-temperature lubricating oil to the high-temperature circuit.

[0028] The following combination Figure 2 The exemplary structure of the oil source device shown herein will be described in detail for the purposes of this specification.

[0029] like Figure 2As shown, the lubricating oil tank 1 is a high-temperature oil tank, and the lubricating oil in the tank is heated by a heating component. The heating temperature of the heating component is higher than the given lubricating oil temperature to ensure that the lubricating oil temperature in the tank 1, i.e., the high-temperature return oil temperature, is higher than the given lubricating oil temperature. The heating component includes a heat exchanger 17 and a heat transfer oil heating unit 18. The first branch is connected to the oil inlet of the tank 1, and the low-temperature lubricating oil in the first branch exchanges heat with the heat transfer oil heated by the heat transfer oil heating unit 18 in the heat exchanger 17 to achieve the heating of the lubricating oil.

[0030] The inlet of the high-temperature oil circuit is connected to the outlet of the oil tank 1. The high-temperature oil circuit includes a high-temperature oil pump 2 and an oil supply valve 6. The high-temperature oil pump 2 operates at a constant speed and ensures that its flow rate is greater than the given lubricating oil flow rate, so as to ensure that the oil supply valve 6 has room to adjust the high-temperature oil supply flow rate. The opening degree of the oil supply valve 6 is determined by equation (1).

[0031] In some embodiments, to ensure a constant inlet and outlet pressure difference of the oil supply valve 6 and to achieve a one-to-one correspondence between the opening degree of the oil supply valve 6 and the high-temperature oil supply flow rate, this is achieved by keeping the inlet pressure and outlet pressure of the oil supply valve 6 constant. In some embodiments, the oil inlet end of the oil supply valve 6 is connected to the oil inlet end of the oil tank 1 through a second branch. The second branch includes an overflow valve 5. The overflow valve 5 allows a portion of the lubricating oil pumped by the high-temperature oil pump 2 that exceeds the high-temperature oil supply flow rate limited by the oil supply valve 6 to flow back to the oil tank 1 through the overflow valve 5, thus keeping the inlet pressure of the oil supply valve 6 constant. In some embodiments, the oil outlet end of the oil supply valve 6 can be connected to the low-temperature oil circuit through a check valve 8. The check valve 8 is a pressureless check valve, that is, the check valve 8 has no opening pressure, making the outlet pressure of the oil supply valve 6 close to atmospheric pressure, thereby keeping the outlet pressure of the oil supply valve 6 constant, that is, keeping the inlet and outlet pressure difference of the oil supply valve 6 constant.

[0032] In some embodiments, the high-temperature oil circuit includes a high-temperature lubricating oil pressure sensor 3, which is disposed in front of the fuel supply valve 6 and is used to detect the inlet pressure of the fuel supply valve 6. In this specification, "front" refers to the side opposite to the flow direction of the lubricating oil in the pipeline, and "rear" refers to the side along the flow direction of the lubricating oil in the pipeline. The low-temperature oil circuit includes a low-temperature lubricating oil pressure sensor 15, which is used to detect the outlet pressure of the fuel supply valve 6, ensuring a constant inlet and outlet pressure difference for the fuel supply valve 6. In some embodiments, the high-temperature oil circuit includes a high-temperature lubricating oil temperature sensor 4, used to obtain the high-temperature fuel supply temperature of the high-temperature oil circuit. The low-temperature oil circuit includes a low-temperature lubricating oil temperature sensor 16, used to obtain the low-temperature fuel supply temperature of the low-temperature oil circuit. In some embodiments, the high-temperature oil circuit also includes a high-temperature fuel supply flow meter 7, used to detect the actual high-temperature fuel supply flow rate, facilitating verification that the actual high-temperature fuel supply flow rate is consistent with the high-temperature fuel supply flow rate Q1, ensuring the safety of the fuel icing experiment.

[0033] In some embodiments, the oil supply circuit includes a metering pump 11. The rotational speed of the metering pump 11 is determined according to a given lubricating oil flow rate, allowing for rapid adjustment of the lubricating oil flow rate in the oil supply circuit. In some embodiments, the oil supply circuit includes a fuel heater 13 and a fuel-oil radiator 14. The lubricating oil supplied by the oil supply circuit exchanges heat with the low-temperature fuel at the fuel heater 13 and the fuel-oil radiator 14, heating the fuel and ensuring that the fuel temperature at the outlet of the fuel-oil radiator remains above 0°C. The lubricating oil temperature decreases after heat exchange with the fuel and is supplied to the low-temperature oil circuit, enabling lubricating oil reuse. The oil supply circuit and the low-temperature oil circuit form a loop. The inlet end of the low-temperature oil circuit is connected to the outlet end of the fuel-oil radiator 14.

[0034] In some embodiments, the fuel supply circuit includes a working lubricating oil temperature sensor 10, used to acquire the actual lubricating oil temperature of the fuel supply circuit, to detect whether the actual lubricating oil temperature is consistent with a given lubricating oil temperature T2, ensuring the safety of the fuel icing experiment. In some embodiments, the fuel supply circuit includes a working flow meter 12, used to acquire the actual lubricating oil flow rate, to detect whether the lubricating oil flow rate determined by the metering pump 11 is consistent with a given lubricating oil flow rate Q2, ensuring the safety of the fuel icing experiment. In some embodiments, the fuel supply circuit also includes a working lubricating oil pressure sensor 9, used to detect the outlet pressure of the fuel supply valve 6, ensuring that the inlet and outlet pressure difference of the fuel supply valve 6 is constant.

[0035] In some embodiments, the low-temperature oil circuit is connected to the oil inlet of the oil tank 1 via a first branch. Excess lubricating oil in the oil supply circuit flows back to the oil tank 1 via the first branch, thus achieving oil reuse. The low-temperature lubricating oil in the first branch exchanges heat with the heat transfer oil at the heat exchanger 17 and the heat transfer oil heating unit 18, thereby heating the low-temperature lubricating oil. The heated low-temperature lubricating oil then supplies high-temperature lubricating oil to the high-temperature circuit via the oil tank 1.

[0036] The basic concepts have been described above. It is clear that the detailed disclosure above is merely illustrative and does not constitute a limitation of this specification, especially for those skilled in the art. Furthermore, unless expressly stated in the claims, the order of elements and sequences, the use of numbers and letters, or other names in this specification are not intended to limit the order of the processes and methods described herein. Although various examples of currently considered useful embodiments of the invention have been discussed in the foregoing disclosure, it should be understood that such details are for illustrative purposes only, and the appended claims are not limited to the disclosed embodiments. Rather, the claims are intended to cover all modifications and equivalent combinations that conform to the substance and scope of the embodiments described herein.

Claims

1. A rapid-response oil source device for temperature and flow rate, characterized in that, The oil source device includes a high-temperature oil circuit, a low-temperature oil circuit, and an oil supply circuit; The oil supply circuit, the high-temperature oil circuit, and the low-temperature oil circuit are connected together at one point. The high-temperature oil supply flow rate of the high-temperature oil circuit is determined by the high-temperature oil supply temperature of the high-temperature oil circuit, the low-temperature oil supply temperature and low-temperature oil supply flow rate of the low-temperature oil circuit, and the given lubricating oil temperature and given lubricating oil flow rate of the oil supply circuit. The high-temperature oil circuit includes an oil supply valve, the opening degree of which corresponds to the high-temperature oil supply flow rate.

2. The oil source device according to claim 1, characterized in that, The fuel supply circuit includes a fuel heater and a fuel oil radiator, and the lubricating oil supplied by the fuel supply circuit exchanges heat with the low-temperature fuel at the fuel heater and the fuel oil radiator. The oil supply circuit is connected end-to-end with the low-temperature oil circuit to form a circuit, and the oil inlet of the low-temperature oil circuit is connected to the oil outlet of the lubricating oil radiator.

3. The oil source device according to claim 2, characterized in that, The low-temperature oil circuit is connected to the oil inlet of the oil tank via a first branch, the first branch including a heating component for heating the low-temperature lubricating oil.

4. The oil source device according to claim 3, characterized in that, The heating temperature of the heating component is greater than the given lubricating oil temperature.

5. The oil source device according to claim 1 or 2, characterized in that, The pressure difference between the inlet and outlet of the oil supply valve is constant, so that the opening degree of the oil supply valve corresponds to the high-temperature oil supply flow rate.

6. The oil source device according to claim 5, characterized in that, The inlet of the high-temperature oil circuit is connected to the outlet of the oil tank, and the inlet of the oil supply valve is connected to the inlet of the oil tank through a second branch. The second branch includes an overflow valve to keep the inlet pressure of the oil supply valve constant. The oil outlet of the oil supply valve is connected to the low-temperature oil circuit through a check valve. The check valve is a pressureless check valve, which keeps the outlet pressure of the oil supply valve constant.

7. The oil source device according to claim 1, characterized in that, The high-temperature circuit includes a high-temperature oil pump, the flow rate of which is greater than the given lubricating oil flow rate.

8. The oil source device according to claim 1, characterized in that, The oil supply circuit includes a metering pump for adjusting the lubricating oil flow rate of the oil supply circuit so that the lubricating oil flow rate is equal to the given lubricating oil flow rate.

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