Nozzle and method of processing thereof, lubricating system

Abstract

The application discloses a nozzle and a machining method and an oil system thereof. The nozzle comprises a nozzle main flow section and a spraying section. The inside of the spraying section comprises a spraying pipeline and a conveying pipeline. The spraying section is communicated with the nozzle main flow section through the conveying pipeline. The inside of the spraying section further comprises an embedded boss. The embedded boss extends from the side where the conveying pipeline and the spraying pipeline are connected to the spraying pipeline and is communicated with the spraying pipeline and the conveying pipeline respectively. The length of the spraying pipeline is at least greater than 3 times of the diameter of the cross-sectional shape of the spraying pipeline. The internal structure of the nozzle is changed for machining without changing the overall structure of the nozzle. The swirling flow of the liquid to be sprayed in the nozzle is effectively inhibited. The divergence degree of the liquid flow line of the liquid to be sprayed from the spraying pipeline is reduced. The oil sprayed from the nozzle can be maximally accommodated by the oil inlet hole. The performance of the nozzle is improved. Meanwhile, the nozzle has a simple structure and is easy to process and form.

Description

Technical Field

[0001] This invention relates to a nozzle and its processing method, and a lubrication system. Background Technology

[0002] With the continuous development and progress of aviation science and technology, the performance of aero engines, the heart of aircraft, is also improving day by day. In recent years, aero engines have been developing towards lighter and more compact designs. Due to the continuous increase in turbine inlet temperature, pressure ratio, and main shaft speed, and the continuous reduction in the number and weight of oil pipes and oil pumps in the lubrication system, higher requirements are placed on the lubrication system of aero engines. As an important auxiliary system of aero engines, the lubrication system largely determines the normal operation of the engine and directly affects its reliability.

[0003] The main function of the lubrication system is to continuously supply an appropriate amount of lubricating oil to the bearings and gear meshing points of various rotating components of the engine, thereby reducing friction and damage between parts and promptly dissipating the generated heat. As an essential component of the aero-engine support system, the main shaft bearing operates in increasingly harsh environments as the main shaft speed and load increase. Frictional losses and a large amount of heat are inevitable during its operation. To ensure the normal operation of the main shaft bearing under high speed, high load, and high temperature conditions, the lubrication system must provide an appropriate amount of lubricating oil to adequately lubricate and cool the main shaft bearing.

[0004] The commonly used oil supply methods for aero-engine main bearings are injection lubrication and under-ring lubrication. Injection lubrication is mainly suitable for bearings with lower rotational speeds and less heat transfer from the main shaft; under-ring lubrication is mainly suitable for bearings with higher rotational speeds, more heat transfer from the main shaft, and ample bearing cavity space. When structural space allows and the DN value is large, under-ring lubrication must be used. Under-ring lubrication involves an oil catcher ring rotating synchronously with the main shaft capturing the lubricating oil injected by the injection nozzle. The lubricating oil entering the catcher ring is delivered along the oil channel to the inner ring of the bearing. At the radial oil holes of the inner ring, the lubricating oil is thrown into the bearing by the centrifugal force of high-speed rotation, providing sufficient cooling and lubrication to the inner and outer rings, cage, and rollers. After a long period of development, under-ring lubrication has become a relatively mature method for aero-engine main bearing lubrication and is used in many models. However, given the high requirements for the structure and machining precision of the catcher ring, structural modifications are difficult. Therefore, ensuring the flow of oil injected from the injection nozzle into the catcher ring is currently the most important consideration. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the defect of large fluid dispersion of the liquid ejected from the nozzle in the prior art, and to provide a nozzle and its processing method, as well as a lubricating oil system.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A nozzle includes a main flow section and an ejection section. The ejection section includes an ejection conduit and a delivery conduit, which are arranged at an angle and connected. The ejection conduit and the delivery conduit are connected to the main flow section via the delivery conduit. The main flow section delivers the liquid to be ejected to the delivery conduit and ejects it from the ejection conduit.

[0008] The interior of the ejection section also includes a built-in boss, which extends from the side of the delivery pipe connected to the ejection pipe toward the ejection pipe and communicates with both the ejection pipe and the delivery pipe. The ratio of the length of the ejection pipe to the diameter of its cross-sectional shape is at least greater than 3.

[0009] In this design, this structural form, without altering the overall external structure of the nozzle, effectively suppresses the swirling of the liquid to be sprayed inside the nozzle by modifying the internal processing. This reduces the divergence of the liquid streamlines as it exits the spray pipe, improves the target clearance rate of the external streamlines, and enhances nozzle performance. Furthermore, this nozzle structure is simple and easy to manufacture, breaking through the traditional structure of the spray section of a lubricating oil system's oil supply ring nozzle. It provides a completely new nozzle structure, opening up new avenues for nozzle design.

[0010] Preferably, the ejection pipe and the delivery pipe are arranged vertically.

[0011] In this design, this structural form can enhance the mobility of the liquid to be sprayed from the delivery pipeline to the spraying pipeline, and increase the force of the liquid to be sprayed from the spraying pipeline.

[0012] Preferably, there are multiple ejection pipes, and one end of each of the multiple ejection pipes is connected to the built-in boss.

[0013] In this solution, this structural form, based on the existing spray pipe, is used to set the number of spray pipes to two, which can further increase the flow rate of the liquid sprayed from the nozzle and improve the efficiency of liquid spraying.

[0014] Preferably, the sum of the cross-sectional areas of the plurality of ejection pipes is less than the cross-sectional area of ​​the built-in boss.

[0015] In this design, this structural form can suppress the swirling of the liquid to be sprayed inside the nozzle to the greatest extent, reduce the divergence of the liquid streamlines sprayed from the spray pipe, improve the target pass rate of the external streamlines of the nozzle, and enhance the nozzle performance.

[0016] Preferably, the built-in boss is in the shape of a rectangular column or a rounded rectangular column.

[0017] In this solution, the structure is designed with the built-in boss in the shape of a rectangular column or a rounded rectangular column. This not only facilitates the processing of the built-in boss, but also maximizes the capacity of the built-in boss, which is more conducive to preventing the liquid to be sprayed from swirling on the built-in boss.

[0018] Preferably, the ejection section includes a first plug located on the ejection section away from the main flow section of the nozzle and connected to the delivery pipeline, the first plug being used to seal the delivery pipeline.

[0019] In this design, the first plug seals the delivery pipeline, preventing the liquid to be sprayed from flowing out of the opening of the pipeline, thus reducing the performance of the nozzle and consequently reducing the nozzle's working efficiency.

[0020] Preferably, the ejection section further includes a second plug, the second plug having the same cross-sectional shape as the built-in boss in the direction of extension of the delivery pipeline, the second plug being used to machine the built-in boss and seal the delivery pipeline.

[0021] In this design, the second plug not only seals the delivery pipeline to prevent the liquid to be sprayed from flowing out of the opening end of the pipeline, thus reducing the performance of the liquid sprayed from the nozzle and consequently reducing the working efficiency of the nozzle, but also facilitates the processing of the built-in boss by the operator. The operator can set the built-in boss as needed based on the accommodating space of the second plug, which facilitates the processing efficiency of the nozzle and also improves the flexibility of the spray assembly.

[0022] A method for manufacturing a nozzle, the method relating to a nozzle as described in any of the above claims, wherein one side of the nozzle orifice on the ejection section is a first side, and the other side away from the nozzle orifice is a second side, the method comprising the following steps:

[0023] S11. A through hole is provided on the second side of the ejection section, the through hole extends toward the first side and passes through the delivery pipeline for a certain distance;

[0024] S12. Based on the through hole on the second side, enlarge the cross-sectional area of ​​the through hole in the direction of extension of the conveying pipeline, and then penetrate the conveying pipeline again for a distance.

[0025] S13. An ejection pipe is provided on the first side surface, and the ejection pipe is connected to the through hole;

[0026] S14. A second plug is provided on the second side, and the second plug is fitted and connected to the through hole.

[0027] Preferably, in steps S11 and S12, the depth to which the through hole extends toward the first side is consistent.

[0028] In this solution, this processing method is adopted to avoid the difference in the depth of the through hole in the two steps, which would affect the processing of the built-in boss. The depth of the built-in boss is the distance from the first side of the conveying pipeline to the end of the through hole. This distance of the built-in boss will also affect the length of the ejection pipeline. The ratio of the length of the ejection pipeline to the cross-sectional diameter of the ejection pipeline will affect the degree of dispersion of the liquid ejected from the nozzle. Therefore, it is necessary to strictly control the depth of the through hole, and there are high requirements for the depth of the through hole.

[0029] A lubricating oil system, the lubricating oil system including a nozzle as described in any one of the above, the lubricating oil system further including an oil inlet, the spraying section of the nozzle being disposed near the oil inlet, the spraying section spraying oil into the oil inlet through the spraying pipe.

[0030] In this design, this structural form, without altering the overall external structure of the nozzle, effectively suppresses the swirling of the liquid to be sprayed inside the nozzle by modifying the internal processing. This reduces the divergence of the liquid streamlines as it exits the spray pipe, improves the target clearance rate of the external streamlines, and ensures that the oil sprayed from the nozzle is maximized to be collected by the inlet orifice, thus enhancing nozzle performance. Simultaneously, this nozzle structure is simple and easy to manufacture, breaking through the traditional structure of the spray section of the lubricating oil system's oil supply nozzle with a catch ring. It provides a completely new nozzle structure, opening up new avenues for the design of lubricating oil system nozzle structures.

[0031] Preferably, the lubricating oil system further includes an oil collection channel and a bearing. One end of the oil collection channel is connected to the oil inlet, and the other end of the oil collection channel is connected to the bearing. The oil collection channel is used to transport the oil in the oil inlet to the bearing for lubrication and cooling.

[0032] In this design, this structural form effectively suppresses the swirling of the liquid to be sprayed inside the nozzle, reduces the divergence of the liquid streamlines sprayed from the spray pipe, improves the target pass rate of the external streamlines of the nozzle, ensures that the oil sprayed from the nozzle can be maximized to be collected by the oil collection channel, greatly improves the reliability of bearing lubrication and cooling of the lubricating oil system, and ensures that the lubricating oil system can operate smoothly.

[0033] The positive and progressive effects of this invention are as follows: without changing the overall external structure of the nozzle, by modifying the internal processing of the nozzle structure, the swirling flow of the liquid to be sprayed inside the nozzle is effectively suppressed, the divergence of the liquid streamlines ejected from the spray pipe is reduced, and the target clearance rate of the external streamlines of the nozzle is improved. This ensures that the oil sprayed from the nozzle can be maximized to be collected by the oil inlet, thereby improving the nozzle performance. At the same time, this nozzle structure is simple and easy to process and form, breaking through the traditional structure of the spray section of the oil supply nozzle of the oil receiving ring in the lubricating oil system, and providing a completely new type of nozzle structure, opening up new ideas for the design of nozzle structures in lubricating oil systems. Attached Figure Description

[0034] Figure 1 This is a schematic diagram of the nozzle structure in Embodiment 1 of the present invention.

[0035] Figure 2 This is a diagram showing the nozzle hitting test state in Embodiment 1 of the present invention.

[0036] Figure 3 This is an enlarged view of the nozzle target test in Embodiment 1 of the present invention.

[0037] Figure 4 This is a schematic diagram of the liquid ejection angle in different directions of the ejection section in Embodiment 1 of the present invention.

[0038] Figure 5 This is a proportional diagram of the internal structure of the ejection section in Embodiment 1 of the present invention.

[0039] Figure 6 This is a schematic diagram of the ejection section in Embodiment 1 of the present invention.

[0040] Figure 7 This is a first-view schematic diagram of the internal structure of the ejection section in Embodiment 1 of the present invention.

[0041] Figure 8 This is a second-view schematic diagram of the internal structure of the ejection section in Embodiment 1 of the present invention.

[0042] Figure 9 This is a schematic diagram of the second plug structure in Embodiment 1 of the present invention.

[0043] Figure 10 This is a flow chart of the nozzle processing method according to Embodiment 2 of the present invention.

[0044] Figure 11 This is a flowchart of the nozzle processing method according to Embodiment 2 of the present invention.

[0045] Figure 12 This is a schematic diagram of the overall structure of the lubricating oil system in Embodiment 3 of the present invention.

[0046] Figure 13This is a side view of the lubricating oil system of Embodiment 3 of the present invention.

[0047] Figure 14 This is a structural diagram of the nozzle and oil inlet hole in Embodiment 3 of the present invention.

[0048] Explanation of reference numerals in the attached figures:

[0049] Nozzle 100

[0050] Nozzle mainstream section 11

[0051] Ejection section 12

[0052] Ejection pipe 121

[0053] Ejector hole 1211

[0054] Delivery pipeline 122

[0055] Built-in boss 123

[0056] First blockage 124

[0057] Second stop 125

[0058] Lubricating oil system 200

[0059] Oil inlet hole 21

[0060] Oil intake channel 22

[0061] Bearing 23

[0062] Gear shaft 24

[0063] Depth H of the built-in boss

[0064] Length L of the ejection pipe

[0065] The diameter D of the cross-sectional shape of the ejection pipe Detailed Implementation

[0066] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0067]

Example 1

[0068] like Figure 1-9 As shown, a nozzle 100 is disclosed, which includes a main nozzle section 11 and an ejection section 12.

[0069] like Figure 1As shown, the interior of the ejection section 12 includes an ejection pipe 121 and a delivery pipe 122, which are arranged at an angle, and this angle can be set arbitrarily as needed. The ejection pipe 121 and the delivery pipe 122 are connected, and the ejection section 12 is connected to the main flow section 11 of the nozzle through the delivery pipe 122. That is, the main flow section 11 of the nozzle, the delivery pipe 122 and the ejection pipe 121 are connected in sequence. The main flow section 11 of the nozzle delivers the liquid to be ejected to the delivery pipe 122 and ejects it from the ejection pipe 121.

[0070] like Figure 7-8 As shown, the interior of the ejection section 12 also includes a built-in boss 123. The built-in boss 123 extends from the side of the conveying pipe 122 connected to the ejection pipe 121 toward the ejection pipe 121. That is, the built-in boss 123 is located at the connection between the ejection pipe 121 and the conveying pipe 122, and is connected to both the ejection pipe 121 and the conveying pipe 122. In other words, when the liquid to be ejected is to be transported from the conveying pipe 122 to the ejection pipe 121, it needs to flow through the built-in boss 123.

[0071] like Figure 2-3 The diagram shows a "nozzle 100 target test" performed on the existing nozzle 100. This test uses a nozzle 100 structure without the built-in boss 123. The test primarily examines the throughput of the liquid stream ejected from the nozzle 100 through the target orifice from the ejection pipe 121. Ideally, the throughput is 100%, meaning all liquid passes through. A lower throughput indicates greater stream divergence and poorer nozzle 100 performance. This also suggests that a low proportion of liquid is collected into the target orifice, resulting in low liquid collection efficiency.

[0072] Specifically, such as Figure 4 As shown, in the target test conducted on the original nozzle 100 structure, the fluid ejected from the nozzle 100 exhibited significant divergence and a very low fluid throughput. The test results indicate that the target throughput of the external streamlines was approximately 70%, which is not ideal, but there is still room for improvement. Further analysis of the streamline divergence reveals that while the longitudinal external streamlines correspond to a relatively large angle α1, it has little impact on the target throughput. The most significant issue lies in the transverse external streamlines, specifically the large angle β1, which results in a low target throughput and fails to meet design requirements.

[0073] When the external streamline pass rate of nozzle 100 does not meet the requirements, computational fluid dynamics (CFD) should be used to verify the cause of the external streamline divergence of nozzle 100. CFD involves using commercial fluid dynamics software to calculate the flow inside the lubricating oil nozzle 100. By examining the flow field inside nozzle 100, the root cause of the external streamline divergence of the nozzle orifice can be identified, allowing for the improvement and optimization of the nozzle 100 structure. The flow field calculation results show that the main reason for the external streamline divergence of the ejection pipe 121 is that the distance between the ejection orifice 1211 and the top of the ejection section 12 is too close, resulting in more intense swirling flow at this point. This leads to a greater divergence of the external streamlines after the liquid exits from the ejection orifice 1211. Due to space constraints, the external structure of the ejection section 12 cannot be further adjusted or modified; therefore, optimization must begin with the internal structure of the ejection section 12.

[0074] Therefore, the purpose of providing the built-in boss 123 in this embodiment is to effectively suppress the swirling of the liquid to be sprayed inside the nozzle 100 by changing the internal processing of the nozzle 100 structure without changing the overall external structure of the nozzle 100. This reduces the divergence of the liquid streamlines sprayed from the spray pipe 121, improves the target pass rate of the external streamlines of the nozzle 100, and enhances the performance of the nozzle 100. At the same time, the nozzle 100 has a simple structure and is easy to process and form. It breaks through the traditional structure of the spray section 12 of the lubricating oil system 200 oil receiving ring oil supply nozzle 100, and provides a brand-new type of nozzle 100 structure, opening up new ideas for the design of the nozzle 100 structure. Therefore, the main problem with the original nozzle 100 model's external streamlines not meeting the standard is that the included angle β1 corresponding to the external streamlines in the lateral direction is too large. According to the calculation results of commercial software, this is caused by the swirling flow inside the nozzle 100. The nozzle 100 structure with built-in boss 123 proposed in this invention can greatly limit the swirling flow of liquid in the ejection pipe 121, thereby reducing the included angle of the external streamlines in the lateral direction.

[0075] The ratio of the length of the ejection conduit 121 to the diameter of its cross-sectional shape is at least greater than 3. For example... Figure 5The diagram shows the length proportions of the components inside the nozzle 100. The depth of the built-in boss 123 is H, the length of the ejection pipe 121 is L, and the diameter of the cross-section of the ejection pipe 121 is D. There are certain limitations on the depth H of the built-in boss 123; the depth H cannot be infinitely large, as this would affect the liquid ejection performance of the entire nozzle 100 and may lead to insufficient flow. According to the "Aero-Engine Handbook" (Volume 12), the length-to-diameter ratio of the ejection pipe 121, i.e., the ratio of the length L to the diameter D of the cross-section of the ejection pipe (L / D), must be at least greater than 3 to ensure that the external streamlines do not diverge too much when the nozzle 100 ejects liquid. Therefore, the value of the depth H of the built-in boss 123 in this embodiment is designed based on this constraint. In other words, if the depth H of the built-in boss 123 is too large, the length L of the ejection pipe will be too small, resulting in an L / D value of less than 3. Such a nozzle 100 structure will cause the external flow dispersion of the ejection hole 1211 to be too large, which will not meet the design requirements.

[0076] In this embodiment, such as Figure 7-8 As shown, the ejection pipe 121 and the delivery pipe 122 are arranged vertically. This structure enhances the mobility of the liquid to be ejected from the delivery pipe 122 to the ejection pipe 121, and increases the force of the liquid to be ejected from the ejection pipe 121.

[0077] Furthermore, there are multiple ejection pipes 121, one end of which is connected to the built-in boss 123, and the other end of the ejection pipe 121 is used to eject liquid from the inside of the nozzle 100. Based on the existing ejection pipes 121, setting the number of ejection pipes 121 to two can further increase the flow rate of liquid ejected from the nozzle 100 and improve the efficiency of liquid ejection.

[0078] Therefore, preferably, while one section of the above-mentioned multiple ejection pipes 121 is connected to the built-in boss 123, the total cross-sectional area of ​​the multiple ejection pipes 121 is less than the cross-sectional area of ​​the built-in boss 123. This can suppress the swirling of the liquid to be ejected inside the nozzle 100 to the greatest extent, reduce the divergence of the liquid streamline ejected from the ejection pipes 121, improve the target pass rate of the external streamline of the nozzle 100, and improve the performance of the nozzle 100.

[0079] Specifically, such as Figure 9 As shown, the built-in boss 123 is shaped as a rectangular column or a rounded rectangular column. This structural form, with the built-in boss 123 shaped as a rectangular column or a rounded rectangular column, not only facilitates the machining of the built-in boss 123, but also maximizes the accommodating space of the built-in boss 123, which is more conducive to preventing the liquid to be ejected from swirling within the built-in boss 123.

[0080] like Figure 9 As shown, in this embodiment, the ejection section 12 further includes a first plug 124 and a second plug 125.

[0081] The first plug 124 is located on the ejection section 12, away from the main flow section 11 of the nozzle, and is connected to the delivery pipeline 122. The first plug 124 is used to seal the delivery pipeline. The second plug 125 has the same cross-sectional shape as the built-in boss 123 in the extension direction of the delivery pipeline 122. The second plug 125 is used to process the built-in boss 123 and seal the delivery pipeline. In this embodiment, the first plug 124 and the second plug 125 are provided on the ejection section 12 to seal the delivery pipeline 122, preventing the liquid to be ejected from flowing out of the opening end of the delivery pipeline 122, reducing the performance of the liquid ejected by the nozzle 100, and thus reducing the working efficiency of the nozzle 100. At the same time, the presence of the second plug 125 also facilitates the operator in processing the built-in boss 123. The operator can set the built-in boss 123 as needed based on the accommodating space of the second plug 125, which facilitates the processing efficiency of the nozzle 100 and also improves the flexibility of the spray assembly.

[0082]

Example 2

[0083] like Figure 10-11 As shown, a method for processing a nozzle 100 is disclosed. This method relates to the nozzle 100 of Embodiment 1 described above. One side of the nozzle 1211 on the ejection section 12 is a first side, and the other side away from the ejection hole 1211 is a second side. The processing method includes the following steps:

[0084] S11. A through hole is provided on the second side of the ejection section 12, the through hole extends toward the first side and passes through the conveying pipe 122 for a certain distance.

[0085] S12. Based on the through hole on the second side, the cross-sectional area of ​​the through hole in the extension direction of the conveying pipeline 122 is enlarged, and the through hole is extended through the conveying pipeline 122 again for a distance.

[0086] S13. An ejection pipe 121 is provided on the first side, and the ejection pipe 121 is connected to the through hole.

[0087] S14. A second plug 125 is provided on the second side, and the second plug 125 is fitted and connected to the through hole.

[0088] In this embodiment, two through holes are first drilled on the second side using a drill bit.

[0089] In a preferred embodiment, the depth of the through hole extending towards the first side is consistent in steps S11 and S12. As mentioned above, the depth of the through hole extending towards the first side is the depth H of the built-in boss. This processing method avoids the difference in the depth of the through hole in the two steps, which would affect the processing of the built-in boss 123. The depth of the built-in boss 123 is the distance from the delivery pipe 122 extending from the first side to the end of the through hole. This distance of the built-in boss 123 also affects the length of the ejection pipe 121. The ratio of the length of the ejection pipe 121 to the cross-sectional diameter of the ejection pipe 121 affects the dispersion of the liquid ejected by the nozzle 100. Therefore, it is necessary to strictly control the depth of the through hole, and there are high requirements for the depth of the through hole.

[0090] After drilling two through holes, use a milling cutter to machine a rectangle or rounded rectangle. The depth of the rectangle or rounded rectangle should be consistent with the depth of the two through holes, with a depth value of H. At this point, the machining of the second plug 125 and the built-in boss 123 is completed. Finally, the machining of the ejection pipe 121 is required. Start from the first side and use a drill to drill two ejection pipes 121. There is no specific numerical requirement for the depth of the ejection pipe 121, as long as it can be drilled through.

[0091]

Example 3

[0092] like Figure 12-14 As shown, a lubricating oil system 200 is disclosed. The lubricating oil system 200 includes the nozzle 100 of Embodiment 1 described above. The lubricating oil system 200 also includes an oil inlet 21. The spraying section 12 of the nozzle 100 is disposed close to the oil inlet 21, that is, the spraying pipe 121 of the spraying section 12 is close to the oil inlet 21, and the spraying section 12 sprays oil into the oil inlet 21 through the spraying pipe 121.

[0093] By adopting this structural form, without changing the overall external structure of the nozzle 100, and by modifying the internal processing of the nozzle 100, the swirling of the liquid to be sprayed inside the nozzle 100 is effectively suppressed. This reduces the divergence of the liquid streamlines ejected from the spray pipe 121, improves the target pass rate of the external streamlines of the nozzle 100, and ensures that the oil sprayed from the nozzle 100 is maximized to be collected by the oil inlet 21, thereby improving the performance of the nozzle 100. At the same time, this nozzle 100 has a simple structure and is easy to process and form. It breaks through the traditional structural form of the spray section 12 of the lubricating oil system 200 oil receiving ring supply nozzle 100, and provides a completely new type of nozzle 100 structure, opening up new ideas for the design of the lubricating oil system 200 nozzle 100 structure.

[0094] In this embodiment, the lubricating oil system 200 is internally equipped with an engine (not shown in the figure), a gear shaft 24, an oil collection channel 22, and a bearing 23. One end of the oil collection channel 22 is connected to the oil inlet 21, and the other end of the oil collection channel 22 is connected to the bearing 23. Under the action of the high-speed rotation of the engine rotor shaft, oil enters the nozzle 100 from the main flow section 11 of the nozzle 100, and then is sprayed out from the spray pipe 121 of the nozzle 100. The oil collection channel 22 rotates at high speed, and under the action of centrifugal force, part of the oil enters the oil collection channel 22. The oil collection channel 22 then transports the oil in the oil inlet 21 to the bearing 23 to lubricate and cool the bearing 23; the other part of the oil fails to enter the oil inlet 21. This structural design effectively suppresses the swirling of the liquid to be sprayed inside the nozzle 100, reduces the divergence of the liquid streamlines sprayed from the spray pipe 121, improves the target pass rate of the external streamlines of the nozzle 100, ensures that the oil sprayed from the nozzle 100 can be maximized to be collected by the oil collection channel 22, significantly improves the reliability of lubrication and cooling of the bearing 23 of the lubricating oil system 200, and ensures that the engine can run smoothly.

[0095] The lubricating oil system 200 in this embodiment has broad promotion and application value, and can be applied to the lubrication structure design of military and civilian aircraft engines, ground gas turbines or gas generators.

[0096] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A nozzle, comprising a main flow section and an ejection section, wherein the ejection section includes an ejection conduit and a delivery conduit, the ejection conduit and the delivery conduit being angled together and connected, the ejection section being connected to the main flow section via the delivery conduit, the main flow section delivering liquid to be ejected to the delivery conduit and ejecting it from the ejection conduit, characterized in that... The interior of the ejection section also includes a built-in boss, which extends from the side of the delivery pipe connected to the ejection pipe toward the ejection pipe and communicates with both the ejection pipe and the delivery pipe. The ratio of the length of the ejection pipe to the diameter of its cross-sectional shape is at least greater than 3.

2. The nozzle as claimed in claim 1, characterized in that, The ejection pipe and the delivery pipe are arranged vertically.

3. The nozzle as described in claim 1, characterized in that, There are multiple ejection pipes, and one end of each ejection pipe is connected to the built-in boss.

4. The nozzle as described in claim 3, characterized in that, The total cross-sectional area of ​​the multiple ejection pipes is less than the cross-sectional area of ​​the built-in boss.

5. The nozzle as claimed in claim 1, characterized in that, The built-in boss is in the shape of a rectangular column or a rounded rectangular column.

6. The nozzle as claimed in claim 1, characterized in that, The ejection section includes a first plug located on the ejection section away from the main flow section of the nozzle and connected to the delivery pipeline. The first plug is used to seal the delivery pipeline.

7. The nozzle as claimed in claim 1, characterized in that, The ejection section also includes a second plug, the second plug having the same cross-sectional shape as the built-in boss in the direction of extension of the conveying pipeline. The second plug is used to process the built-in boss and seal the conveying pipeline.

8. A method for processing a nozzle, characterized in that, The processing method relates to the nozzle according to any one of claims 1-7, wherein one side of the nozzle orifice on the ejection section is a first side, and the other side away from the nozzle orifice is a second side, and the processing method includes the following steps: S11. A through hole is provided on the second side of the ejection section, the through hole extends toward the first side and passes through the delivery pipeline for a certain distance; S12. Based on the through hole on the second side, enlarge the cross-sectional area of ​​the through hole in the direction of extension of the conveying pipeline, and then penetrate the conveying pipeline again for a distance. S13. An ejection pipe is provided on the first side surface, and the ejection pipe is connected to the through hole; S14. A second plug is provided on the second side, and the second plug is fitted and connected to the through hole.

9. The nozzle processing method as described in claim 8, characterized in that, In steps S11 and S12, the depth to which the through hole extends toward the first side is consistent.

10. A lubricating oil system, characterized in that, The lubricating oil system includes the nozzle as described in any one of claims 1-7, and the lubricating oil system further includes an oil inlet hole. The spraying section of the nozzle is disposed close to the oil inlet hole, and the spraying section sprays oil into the oil inlet hole through the spraying pipe.

11. The lubricating oil system as claimed in claim 10, characterized in that, The lubricating oil system also includes an oil collection channel and a bearing. One end of the oil collection channel is connected to the oil inlet, and the other end of the oil collection channel is connected to the bearing. The oil collection channel is used to transport the oil in the oil inlet to the bearing for lubrication and cooling.

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