A lubricating oil nozzle

Abstract

The application provides a lubricating oil nozzle, and relates to the technical field of lubricating oil system components. The lubricating oil nozzle comprises a main body and a spiral piece. The main body is provided with an oil inlet hole and an oil injection hole which are in communication with each other. The axis of the oil injection hole is at an angle to the axis of the oil inlet hole, and the oil inlet hole has opposite oil inlet ends and blind ends, and the blind ends have tapered surfaces. The communication part of the oil injection hole and the oil inlet hole is closer to the blind end than the oil inlet end. The spiral piece is installed in the oil injection hole, so that the spiral flow of the lubricating oil entering the oil injection hole from the oil inlet hole is offset by the spiral piece, the divergence degree of the lubricating oil sprayed from the oil injection hole is reduced, and the over-target rate of the lubricating oil nozzle is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of lubricating oil system components, in particular to a lubricating oil nozzle. BACKGROUND

[0002] With the continuous development and progress of the level of aviation science and technology, the performance of the aviation engine, known as the "pearl of the industrial crown", is also increasing. At present, advanced aviation engines are developing towards high power and high speed, specifically, the aviation engine will have high turbine inlet temperature, high pressure ratio, high main shaft speed and strict component space limitation. Although the main components, such as the compressor, the combustion chamber and the turbine, are the direct factors affecting the performance improvement of the aviation engine, the performance improvement of the aviation engine also needs the assistance of each system to ensure that the engine can continue to operate, and the performance of the lubricating oil system, which is the only system in the engine that adopts a circulating mode, is crucial to whether the engine can operate normally.

[0003] The lubricating oil system is responsible for delivering lubricating oil to the frictional components, cooling the engine, and cleaning the debris generated by each component. During the operation of the aviation engine, rotating parts such as bearings and gears are in contact with each other and will inevitably generate friction loss and a large amount of heat. At this time, the lubricating system needs to provide lubricating oil to reduce the temperature of the components and carry away the heat and wear generated between the components, so the lubrication and cooling of the gears in the main bearing of the aviation engine and the gearbox of the transmission system are extremely important.

[0004] In the lubricating oil system, the component that provides lubricating oil is the lubricating oil nozzle. All mature lubrication methods, such as under-ring lubrication, jet lubrication, and oil mist lubrication, need to spray lubricating oil from the lubricating oil nozzle to provide lubricating oil to the corresponding components for lubrication and cooling. The performance indicators of the lubricating oil nozzle have a decisive effect on the performance of the entire lubricating oil system. For the lubricating oil nozzle, there are mainly two performance indicators, one is the outlet flow of the lubricating oil nozzle, which determines the oil supply amount, and it is directly related to the heat generated by the rotating parts in the engine. The higher the friction heat generated by the rotating parts, the greater the demand for oil supply. The other important indicator is the divergence degree of the external flow lines of each jet hole of the lubricating oil nozzle, also known as the circularity and bunching of the external flow lines, which directly determines how much lubricating oil can enter the target area to provide effective lubrication and cooling for the rotating parts. The structure of the lubricating oil nozzle in the aviation engine lubricating oil system has been basically mature after many years of structural design, but in the flow direction test before the actual delivery of the lubricating oil nozzle, there is still a phenomenon of large divergence degree of the external flow lines of the jet hole of the lubricating oil nozzle and unsatisfactory over-target rate. Therefore, how to improve the over-target rate has become one of the important problems to be solved in the design of the lubricating oil nozzle. SUMMARY

[0005] The present application aims to provide a lubricating oil nozzle which can effectively improve the over-target rate of the lubricating oil nozzle so that the divergence of the external streamline of the lubricating oil nozzle is small.

[0006] The embodiments of the present application can be implemented in the following manner:

[0007] A lubricating oil nozzle comprises a main body, an oil inlet hole and an oil injection hole in communication with the oil inlet hole are arranged in the main body, the axis of the oil injection hole is at an angle to the axis of the oil inlet hole, the oil inlet hole has opposite oil inlet end and blind end, the blind end is provided with a tapered surface, and the communication between the oil injection hole and the oil inlet hole is closer to the blind end than the oil inlet end.

[0008] The lubricating oil nozzle further comprises a spiral member installed in the oil injection hole, and the spiral member is used to counteract the rotational flow of the lubricating oil entering the oil injection hole from the oil inlet hole.

[0009] Optionally, the spiral member comprises a fixed rod and a spiral piece, the fixed rod is fixedly connected to one axial end of the spiral piece, and the fixed rod is used to be clamped and matched with the main body to fix the spiral member in the oil injection hole.

[0010] Optionally, the main body is provided with a clamping positioning groove, and the fixed rod is embedded in the clamping positioning groove.

[0011] Optionally, the groove depth of the clamping positioning groove is d, and 1mm≤d≤2mm.

[0012] Optionally, the minimum distance between the clamping positioning groove and the tapered surface is L2, and 1mm≤L2.

[0013] Optionally, the clamping positioning groove comprises a first groove segment and a second groove segment located on the two radial sides of the oil injection hole, and the lengths of the first groove segment and the second groove segment are the same.

[0014] Optionally, the thickness of the spiral piece is consistent with the thickness of the fixed rod.

[0015] Optionally, the fixed rod has an arc surface away from one end of the spiral piece, the arc surface has the same curvature as the wall surface of the oil inlet hole, so that the arc surface and the wall surface of the oil inlet hole fit to form a smooth cylindrical surface.

[0016] Optionally, the radial outer wall surface of the spiral piece is fitted with the wall surface of the oil injection hole.

[0017] Optionally, a plug hole coaxially extending with the oil injection hole is arranged on the main body, and the plug hole is located on both sides of the oil injection hole relative to the oil inlet hole; the oil injection nozzle further comprises a plug installed in the plug hole; the radial dimension of the plug hole is greater than the spiral piece, so that the spiral piece is installed into the oil injection hole through the plug hole.

[0018] Optionally, the oil injection nozzle further comprises a nozzle pipe installed in the oil injection hole, one end of the nozzle pipe is located in abutment with the spiral piece, and the other end of the nozzle pipe is used for spraying the oil in the oil injection hole.

[0019] The beneficial effects of the oil injection nozzle provided by the embodiments of the present application include:

[0020] The embodiments of the present application provide an oil injection nozzle, which comprises a main body and a spiral piece. The main body is provided with an oil inlet hole and an oil injection hole in communication with each other, the axis of the oil injection hole is at an angle to the axis of the oil inlet hole, and the oil inlet hole has opposite oil inlet ends and blind ends, and the blind end has a tapered surface. The communication part of the oil injection hole and the oil inlet hole is closer to the blind end than the oil inlet end. The spiral piece is installed in the oil injection hole, so as to offset the swirl of the oil entering the oil injection hole from the oil inlet hole through the spiral piece, so that the divergence degree of the oil sprayed from the oil injection hole is reduced, and the over-target rate of the oil injection nozzle is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The above features and advantages of the present application can be better understood after reading the detailed description of embodiments of the present application in conjunction with the following drawings. In the drawings, components are not necessarily drawn to scale, and components having similar related properties or features can have the same or similar reference numerals.

[0022] Figure 1 A structure schematic diagram of an existing oil injection nozzle during a flow test is shown;

[0023] Figure 2 A longitudinal section structure schematic diagram of an oil injection nozzle provided according to an aspect of the present application is shown;

[0024] Figure 3 A structure schematic diagram of Figure 2 A partial structure enlarged schematic diagram at A in FIG. 5;

[0025] Figure 4 A structure schematic diagram of a spiral piece in an oil injection nozzle provided according to an aspect of the present application is shown;

[0026] Figure 5 A structure schematic diagram of a spiral piece in an oil injection nozzle provided according to an aspect of the present application is shown from another perspective;

[0027] Figure 6Fig. 1 shows a schematic diagram of the direction of the swirl of the oil formed in the oil injection hole of the oil injection nozzle according to an aspect of the present application;

[0028] Figure 7 Fig. 2 shows a schematic diagram of the structure of the oil injection hole and the oil inlet hole of the oil injection nozzle according to an aspect of the present application;

[0029] Figure 8 Fig. 3 shows a schematic diagram of the partial structure of the oil injection nozzle according to an aspect of the present application;

[0030] Figure 9 Fig. 4 shows a schematic diagram of the partial structure of the oil injection nozzle according to another aspect of the present application;

[0031] Figure 10 Fig. 5 shows a schematic diagram of the structure of the oil injection nozzle when performing a flow test according to an aspect of the present application.

[0032] Reference signs:

[0033] 10 - oil injection nozzle; 100 - main body; 110 - oil inlet hole; 111 - oil inlet end; 112 - conical surface; 120 - clamping positioning groove; 121 - first groove section; 122 - second groove section; 130 - oil injection hole; 140 - plug hole; 200 - spiral member; 211 - fixed rod; 212 - spiral piece; 300 - plug; 400 - nozzle tube;

[0034] 21 - target plate; 22 - external streamline. DETAILED DESCRIPTION

[0035] The present application will be described in detail below with reference to the accompanying drawings and specific embodiments. Note that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be understood as limiting the scope of protection of the present application in any way.

[0036] In the description of the present application, it should be noted that if the terms "upper", "lower", "inner", "outer", "vertical", etc. indicate the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the present application is usually placed, and do not indicate or imply that the device or element must have a particular orientation or be constructed and operated in a particular orientation, therefore it should not be understood as limiting the present application.

[0037] At the same time, it should be noted that if the terms "first", "second", etc. are used only for differentiation and description, and should not be understood as indicating or implying relative importance.

[0038] In the description of the present application, it is also necessary to point out that, unless otherwise explicitly specified or limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, it can be fixed connection, it can be integrally connected, or it can be detachably connected; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through intermediate medium, or internal connection of two elements, etc. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0039] The oil nozzle is an important part in the oil system of an aero-engine, and provides oil to bearings, oil rings and gear meshing areas through the oil nozzle. Before being processed and delivered, each oil nozzle needs to be tested for flow and flow direction. Generally, in the process of flow and flow direction test, as shown in Figure 1 Specifically, according to the technical requirements of the oil nozzle, a target plate 21 is made, which is a ring-shaped part with a through hole in the middle. Then the target plate 21 is arranged at a predetermined distance from the oil injection hole, and then oil is supplied to the oil nozzle, and the oil is sprayed to the target plate 21 through the oil nozzle, so as to check whether the external flow line 22 (i.e. the flow line formed after the oil is sprayed out of the oil injection hole) of the oil injection hole can pass through the target and whether the flow rate can meet the design requirements. At the same time, if the predetermined distance exceeds 50 mm, the external flow line 22 will be affected by air, and the divergence will be greater, which will seriously affect the target passing rate

[0040] The target passing condition of the external flow line 22 is specifically the target passing rate of the external flow line 22 passing through the through hole in the middle of the target plate 21. If the target passing rate of the external flow line 22 is low, it may lead to insufficient oil obtained by the oil target (such as the above-mentioned bearings, oil rings) of the oil nozzle, and thus affect the lubrication effect. For example, when the divergence of the external flow line 22 of the oil nozzle is serious (i.e. the target passing rate is low), the flow line sprayed into the bearing cavity may be bounced by the highly rotating bearing or cannot be collected by the oil ring, resulting in low oil collection efficiency of the oil ring, and thus greatly affecting the lubrication effect. However, when lubricating the gear meshing area, the divergence of the external flow line 22 of the oil nozzle is large, and will not affect the lubrication effect of the oil nozzle.

[0041] As Figure 1The over-target rate of the outer flow line 22 is about 40% in the shown over-target rate test result, which is difficult to meet the use requirement. The inventor finds that the main reason for the low over-target rate is that the distance between the oil injection hole and the conical surface of the oil inlet hole is relatively short, so that the internal oil flow entering the oil injection hole from the oil inlet hole generates a swirl flow, which in turn causes the oil flow injected from the oil injection hole to be not straight and to have a large divergence degree. The swirl flow formed in the oil injection hole of the oil nozzle is a one-way swirl flow, and the length of the oil injection hole cannot consume the swirl flow sufficiently, so the over-target rate of the outer flow line 22 cannot be improved. The oil nozzle provided in the present embodiment is to offset the swirl flow to improve the over-target rate of the oil nozzle.

[0042] Figure 2 A longitudinal sectional structure schematic diagram of the oil nozzle 10 provided in the present embodiment is shown, Figure 3 Figure 2 A local structure enlarged schematic diagram at position A in the figure is shown. Please refer to Figure 2 Figure 3 The present embodiment provides an oil nozzle 10, which can be used in the oil system of an aero-engine. The oil nozzle 10 comprises a main body 100 and a spiral member 200. The main body 100 is provided with an oil inlet hole 110 and an oil injection hole 130 which are in communication with each other. The axis of the oil injection hole 130 is at an angle to the axis of the oil inlet hole 110, and the oil inlet hole 110 has opposite oil inlet end 111 and blind end, and the blind end has a conical surface 112. The communication position of the oil injection hole 130 and the oil inlet hole 110 is closer to the blind end than the oil inlet end 111. The spiral member 200 is installed in the oil injection hole 130, so as to offset the swirl flow of the oil entering the oil injection hole 130 from the oil inlet hole 110 through the spiral member 200, so that the divergence degree of the oil injected from the oil injection hole 130 is reduced, and the over-target rate of the oil nozzle 10 is improved. Specifically, in the present embodiment, the axis of the oil injection hole 130 is perpendicular to the oil inlet hole 110. Meanwhile, the oil nozzle 10 provided in the present embodiment can be widely applied in the oil system lubrication and cooling structure design of an aero-engine, a ground combustion engine or a gas generator.

[0043] Figure 4 A structure schematic diagram of the spiral member 200 in the oil nozzle 10 provided in the present embodiment is shown, Figure 5 A structure schematic diagram of the spiral member 200 in the oil nozzle 10 provided in the present embodiment is shown, Figure 6 A schematic diagram of the direction of the swirl flow formed by the oil entering the oil injection hole 130 in the oil nozzle 10 provided in the present embodiment is shown. Please refer to Figures 2-6 The spiral member 200 in the present embodiment has a spiral structure of the spiral member 200, which guides the oil to move in the direction opposite to the direction of the swirl flow, so as to offset the swirl flow generated by the oil, and make the oil flow injected from the oil injection hole 130 straight. Specifically, as Figure 5 Figure 6 ​​​As shown, the swirl direction generated by the lubricating oil is counterclockwise, and correspondingly, the helical member 200 having a clockwise rotation direction is used to offset the swirl. Similarly, if the swirl direction generated by the lubricating oil is clockwise, a helical member 200 having a counterclockwise rotation direction is used to offset the swirl, so as to achieve the purpose of improving the over-target rate.

[0044] It should be noted that the direction of the swirl can be obtained by three-dimensional fluid mechanics software analysis and calculation on the lubricating oil nozzle 10 with the helical member 200 installed, and the length and helical angle of the helical member 200 required to offset the swirl can also be set according to the specific swirl intensity and the like. Specifically, according to simulation calculation and engineering experience, for the lubricating oil nozzle 10 with the diameter of the oil injection hole 130 greater than 2 mm, the internal swirl will be larger. This is because when the diameter of the oil injection hole 130 exceeds 2 mm, the flow of the lubricating oil nozzle 10 will increase, the internal flow rate will be larger, and the swirl flow will be more intense. Therefore, according to the swirl intensity, the methods such as increasing the helicity of the helical member 200 and the length of the helical structure can be used to more effectively offset the one-way swirl in the oil injection hole 130.

[0045] In the embodiment, the helical member 200 includes a fixed rod 211 and a helical sheet 212, and the helical structure is formed by the helical sheet 212. The fixed rod 211 is fixedly connected to one axial end of the helical sheet 212, and the fixed rod 211 is used for clamping connection with the main body 100, so as to fix the helical member 200 in the oil injection hole 130. Specifically, the length L3 of the fixed rod 211 is greater than the radial dimension of the helical sheet 212, so that the two ends of the length direction of the fixed rod 211 protrude from the radial periphery of the helical sheet 212, so as to be clamped with the main body 100. Further, the radial outer wall surface of the helical sheet 212 is in abutment with the wall surface of the oil injection hole 130, so as to ensure that all the lubricating oil in the oil injection hole 130 can be sprayed outward after being guided by the helical sheet 212, thereby ensuring that the swirl is offset by the guidance of the helical sheet 212 before being sprayed, and the over-target rate is improved.

[0046] Further, the thickness of the fixed rod 211 is set to be consistent with the thickness of the helical sheet 212, and the thickness of the helical sheet 212 is the distance between the two helical surfaces of the helical sheet 212. Since the thickness of the fixed rod 211 is consistent with the thickness of the helical sheet 212, the two helical surfaces of the helical sheet 212 are directly connected and smoothly transitioned with the two side surfaces of the thickness direction of the fixed rod 211.

[0047] Figure 7 The structure schematic diagram of the connection between the oil injection hole 130 and the oil inlet hole 110 in the lubricating oil nozzle 10 provided in the embodiment is shown. Please refer to Figures 2-7Optionally, the main body 100 is provided with a clamping positioning groove 120, and the fixing rod 211 is embedded in the clamping positioning groove 120, so as to ensure the connection reliability of the spiral part 200 and the main body 100, and avoid loosening of the spiral part 200. At the same time, through the limiting of the clamping positioning groove 120 to the fixing rod 211, the rotation of the spiral part 200 relative to the main body 100 in the use process can be effectively avoided.

[0048] Specifically, in the embodiment, the fixing rod 211 is a substantially cuboid rod, and correspondingly, the clamping positioning groove 120 is a rectangular groove. At the same time, the clamping positioning groove 120 is provided with a first groove section 121 and a second groove section 122 located on the two sides of the oil injection hole 130 in the radial direction, and the two ends of the radial circumference of the protruding spiral piece 212 in the length direction of the fixing rod 211 are clamped by the first groove section 121 and the second groove section 122, respectively.

[0049] Further, the groove depth of the clamping positioning groove 120 is set to be consistent with the width of the fixing rod 211, so that after the fixing rod 211 is embedded in the clamping positioning groove 120, the fixing rod 211 neither protrudes from the clamping positioning groove 120 nor is recessed relative to the wall surface of the oil injection hole 110. In this way, the fixing rod 211 is flush with the oil injection hole 110, thereby avoiding the additional influence of the fixing rod 211 on the flow of lubricating oil. Specifically, the width of the fixing rod 211 is the distance between the wall surface close to the spiral piece 212 and the wall surface away from the spiral piece 212 of the fixing rod 211.

[0050] Further, since the wall surface of the oil injection hole 110 is a cylindrical surface, the wall surface of the fixing rod 211 away from the spiral piece 212 can also be provided as an arc surface, which has the same curvature as the wall surface of the oil injection hole 110. In this way, when the fixing rod 211 is embedded in the clamping positioning groove 120, the arc surface is fitted with the wall surface of the oil injection hole 110 to form a smooth cylindrical surface.

[0051] In the embodiment, the main dimensions of the clamping positioning groove 120 include three parts, which are the groove depth d of the clamping positioning groove 120, the length of the clamping positioning groove 120, and the minimum distance between the arc surface of the clamping positioning groove 120 and the oil injection nozzle 10.

[0052] Optionally, the groove depth d of the clamping positioning groove 120 is set to be 1mm≤d≤2mm. Specifically, the groove depth d of the clamping positioning groove 120 can be set to be 1mm, 1.5mm or 2mm. If the groove depth d is set to be too large, it may cause the risk of insufficient strength of the oil injection nozzle 10, and if the groove depth d is too small, it may cause the risk that the spiral part 200 cannot be fixed well.

[0053] Optionally, the length of the snap-fit ​​positioning groove 120 is specifically reflected in the lengths of the first groove segment 121 and the second groove segment 122. Specifically, the first groove segment 121 and the second groove segment 122 are symmetrically distributed in a plane relative to the axis of the through-hole 130. Correspondingly, the length, groove depth, and other dimensions of the first groove segment 121 are the same as those of the second groove segment 122. The length of the first groove segment 121 is as follows: Figure 7 As shown in the diagram, L1. Thus, the actual length of the snap-fit ​​positioning groove 120 is twice the length L1 of the first groove segment 121 plus the diameter D of the oil injection hole 130. Meanwhile, in this embodiment, the length of the snap-fit ​​positioning groove 120 is the same as the length L3 of the fixing rod 211, i.e., L3 = 2L1 + D.

[0054] Furthermore, the thickness of the snap-fit ​​positioning groove 120 is the same as the thickness of the fixing rod 211. In other words, the thickness of the snap-fit ​​positioning groove 120, the thickness of the fixing rod 211, and the thickness of the spiral plate 212 are all the same. By setting the thickness of the snap-fit ​​positioning groove 120 to be the same as the thickness of the fixing rod 211, the dimensions of the snap-fit ​​positioning groove 120 are completely consistent with the dimensions of the fixing rod 211, and all the walls of the snap-fit ​​positioning can fit against the fixing rod 211.

[0055] Figure 8 This is a partial structural diagram of the lubricating oil nozzle 10 provided in this embodiment. Specifically, Figure 8 The diagram shows the structure in which the internal spiral component 200 of the lubricating nozzle 10 mates with the main body 100. Please refer to the reference. Figures 2-8 Optionally, the minimum distance between the snap-fit ​​positioning groove 120 and the conical surface 112 is L2, where 1mm ≤ L2. Specifically, the minimum distance L2 between the snap-fit ​​positioning groove 120 and the conical surface 112 can be set to 1mm, 1.5mm, or 2mm, etc. By limiting the minimum distance between the snap-fit ​​positioning groove 120 and the conical surface 112, a certain machining distance margin can be maintained during the machining of the snap-fit ​​positioning groove 120.

[0056] It should also be noted that, in such cases Figures 2-8 In the lubricating oil nozzle 10 structure shown, the installation angle of the spiral member 200 is 90°. In other words, in the case of... Figure 2 and Figure 8 In the structure shown, the length direction of the snap-fit ​​positioning groove 120 is parallel to the axis of the oil inlet hole 110. However, the installation angle of the spiral component 200 is not limited to 90°. It can be adjusted according to the structural changes of the lubricating nozzle 10. For example, if the axis of the oil injection hole 130 and the axis of the oil inlet hole 110 change, the installation angle can be adjusted according to the simulation results. As an example, Figure 9 The structure when the installation angle θ of the spiral component 200 is not 90°.

[0057] Please refer to the reference again.Figure 2 And Figure 3 In the embodiment, the main body 100 is further provided with a plug hole 140 coaxially extending with the oil injection hole 130. The plug hole 140 and the oil injection hole 130 are located on both sides of the oil inlet hole 110, and the plug hole 140 and the oil injection hole 130 are communicated through the oil inlet hole 110. The radial dimension of the plug hole 140 is greater than the spiral part 200, so that the spiral part 200 can be installed into the oil injection hole 130 through the plug hole 140. Specifically, the radial dimension of the plug hole 140 is greater than the length L3 of the fixed rod 211, so that the spiral part 200 is inserted into the oil injection hole 130 in a manner of passing through the plug hole 140 and the oil inlet hole 110 in sequence. At the same time, the oil nozzle 10 further comprises a plug 300 installed in the plug hole 140, and the plug hole 140 is blocked by the plug 300, so that during the oil injection process, the oil nozzle 10 can only enter through the oil inlet end 111 of the oil inlet hole 110, and then inject oil outward through the oil injection hole 130 away from the oil inlet hole 110.

[0058] Specifically, during the machining process, the oil inlet hole 110 and the plug hole 140 can be machined on the main body 100 first, and then the tool is inserted from the plug hole 140 to machine the clamping positioning groove 120. After the clamping positioning groove 120 is machined, the oil injection hole 130 is machined from the other side of the main body 100, so that the structure of the main body 100 is machined. Then the spiral part 200 is inserted from the plug hole 140, and the fixed rod 211 of the spiral part 200 is embedded in the clamping positioning groove 120, so that the installation of the spiral part 200 is completed, and finally the plug 300 is installed.

[0059] By providing the plug hole 140, not only the installation of the spiral part 200 is facilitated, but also the plug hole 140 can be used as an observation hole to check the matching degree of the spiral part 200 and the oil injection hole 130. Further, the end of the plug hole 140 away from the oil inlet hole 110 can be provided with a chamfer to guide the installation.

[0060] Figure 10 The structure schematic diagram of the oil nozzle 10 provided by the embodiment during the flow test is shown. As Figure 10 shown, the oil nozzle 10 provided by the embodiment can achieve that the divergence degree of the external streamline of the oil nozzle 10 is small, the over-target rate is increased from the original 40% to 80%, and for part of the nozzles, the over-target rate can even reach 100%, which ensures that the oil nozzle 10 can effectively and continuously provide lubrication and cooling for the rotating parts in the aero-engine.

[0061] Further, the oil nozzle 10 provided by the embodiment further comprises a nozzle pipe 400 arranged in the oil injection hole 130, one end of the nozzle pipe 400 is located in abutment with the spiral part 200, and the other end of the nozzle pipe 400 is used for spraying the lubricating oil in the oil injection hole 130. Specifically, the radial dimension of the oil injection hole 130 at the position where the spiral part 200 is arranged is consistent with the radial dimension of the position where the nozzle pipe 400 is arranged. When the flow test is performed, the oil injection flow of the oil nozzle 10 without the nozzle pipe 400 is directly checked, and if the test result shows that the oil injection flow is greater than the design requirement, the nozzle pipe 400 with a suitable inner diameter can be selected according to the required reduced lubricating oil flow and arranged in the oil injection hole 130. Specifically, if the flow is larger, the nozzle pipe 400 with a smaller inner diameter is used. When in use, the nozzle pipe 400 can be first fixed on the main body 100 by using a tool, and the nozzle pipe 400 cannot move relative to the main body 100 while ensuring that the lubricating oil continuously flows out through the nozzle pipe 400. If the test result shows that the flow meets the design requirement, the nozzle pipe 400 can be fixed in the oil injection hole 130 by welding or other methods. In this way, the flow after the target can meet the design requirement.

[0062] The oil nozzle 10 provided by the embodiment comprises the spiral part 200 arranged in the oil injection hole 130, the rotation direction of the spiral part 200 is opposite to the rotation direction of the lubricating oil entering the oil injection hole 130, so that the spiral part 200 can offset the rotation flow and play a role of flow regulation, thereby improving the flow rate of the flow line outside the oil nozzle 10. At the same time, by arranging the spiral part 200 and the nozzle pipe 400 on the oil nozzle 10, the lubricating oil flow can be dynamically matched, so that the flow before and after the target can meet the design requirement. At the same time, the oil nozzle 10 with the spiral part 200 has a simple processing mode, and the flow rate can be effectively improved by simple improvement, has strong applicability, and can effectively reduce the failure rate caused by poor lubrication.

[0063] The above merely illustrates the specific embodiments of the present application, but the protection scope of the present application is not limited thereto, and any changes or replacements within the technical range disclosed by the present application can be easily thought by those skilled in the art, and should be covered within the protection scope of the present application.

Claims

1. A lubricating oil nozzle, comprising a body, wherein an oil inlet hole and an oil spray hole communicating with the oil inlet hole are provided within the body, the axis of the oil spray hole forms an angle with the axis of the oil inlet hole, and the oil inlet hole has an inlet end and a blind end opposite to each other, the blind end being provided with a conical surface, and the connection between the oil spray hole and the oil inlet hole being closer to the blind end than the inlet end; characterized in that: The lubricating nozzle further includes a spiral component installed inside the injection hole, and the spiral component is used to counteract the swirling flow of lubricating oil entering the injection hole from the oil inlet.

2. The lubricating nozzle according to claim 1, characterized in that: The spiral component includes a fixed rod and a spiral blade. The fixed rod is fixedly connected to one axial end of the spiral blade and is used to engage with the main body to fix the spiral component inside the oil injection hole.

3. The lubricating nozzle according to claim 2, characterized in that: The main body is provided with a snap-fit ​​positioning groove, and the fixing rod is embedded in the snap-fit ​​positioning groove.

4. The lubricating nozzle according to claim 3, characterized in that: The groove depth of the snap-fit ​​positioning groove is d, where 1mm ≤ d ≤ 2mm.

5. The lubricating nozzle according to claim 3, characterized in that: The minimum distance between the snap-fit ​​positioning groove and the conical surface is L2, where 1mm ≤ L2.

6. The lubricating nozzle according to claim 3, characterized in that: The snap-fit ​​positioning groove includes a first groove segment and a second groove segment located on both radial sides of the oil injection hole, wherein the first groove segment and the second groove segment have the same length.

7. The lubricating nozzle according to claim 2, characterized in that: The thickness of the spiral blade is the same as the thickness of the fixing rod.

8. The lubricating nozzle according to claim 2, characterized in that: The fixing rod has an arc surface away from the end of the spiral blade. The arc surface has the same curvature as the wall surface of the oil inlet hole, so that the arc surface fits into the wall surface of the oil inlet hole to form a smooth cylindrical surface.

9. The lubricating nozzle according to claim 2, characterized in that: The radial outer wall of the spiral blade is in contact with the wall of the oil injection hole.

10. The lubricating nozzle according to any one of claims 1-9, characterized in that: The main body is also provided with a plug hole extending coaxially with the oil injection hole, and the plug hole and the oil injection hole are located on opposite sides of the oil inlet hole; the lubricating nozzle also includes a plug installed in the plug hole; the radial dimension of the plug hole is larger than that of the spiral member, so that the spiral member can be installed into the oil injection hole through the plug hole.

11. The lubricating nozzle according to any one of claims 1-9, characterized in that: The lubricating oil nozzle also includes a nozzle tube installed in the oil injection hole. One end of the nozzle tube is positioned against the spiral component, and the other end of the nozzle tube is used to spray the lubricating oil out of the oil injection hole.

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