Lubricating oil nozzle

Abstract

The invention provides a lubricating oil nozzle, and belongs to the field of aero-engines, the lubricating oil nozzle comprises a nozzle body, a nozzle mounting seat is arranged at the upper end of the nozzle body, and the nozzle body can be fixedly connected with a bearing mounting seat through the nozzle mounting seat; a positioning section, a switching section and an oil collecting section are sequentially arranged on the nozzle body on the lower side of the nozzle mounting seat, an oil supply pipe mounting hole, a first lubricating oil channel and a second lubricating oil channel are sequentially formed along the axis of the nozzle body from top to bottom, and a first oil collecting groove and a second oil collecting groove are formed in the bottom of the nozzle body; the first oil collecting groove is communicated with a first oil spraying hole and a second oil spraying hole which are used for spraying lubricating oil to a turbine fulcrum bearing of the gas generator together, and the second oil collecting groove is communicated with a third oil spraying hole which is used for spraying the lubricating oil to a power turbine fulcrum bearing. According to the lubricating oil nozzle, lubricating oil injection in two directions can be achieved, the limited installation space can be effectively utilized, and the use requirement can be met without arranging two lubricating oil nozzles.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of aero-engines, and particularly relates to an oil nozzle. BACKGROUND

[0002] As one of the important components of the oil supply function, the oil nozzle is the most basic component in the oil system of an aero-engine and a gas turbine, and directly provides lubricating and cooling oil for each fulcrum bearing. In order to enable the oil to pass through the gap of the rotating machinery (the gap of the bearing, etc.), the oil nozzle should not only ensure correct installation so that the oil can be sprayed to the required position, but also provide sufficient spraying speed. In order to take into account the spraying speed and prevent the nozzle hole from being blocked, the hole diameter of the nozzle is generally set to be between 0.6mm and 1.2mm, and when a larger flow is required, multiple nozzles are often used to ensure the flow requirement.

[0003] At present, the oil nozzle used in an aero-engine and a gas turbine generally directly sprays the oil pressurized by a pump set to the fulcrum bearing. This oil nozzle has simple structure and reliable work, but the No. 4 fulcrum bearing and the No. 5 fulcrum bearing inside a certain type of gas turbine belong to the gas generator turbine and the power turbine respectively, and the installation space of the oil nozzle is compact after combined assembly, so it cannot meet the installation of two nozzles with different spraying directions, and thus cannot meet the requirement of simultaneously providing lubricating and cooling oil for the two fulcrum bearings of the gas generator turbine and the power turbine by using the same oil nozzle. SUMMARY

[0004] The purpose of the present application is to provide an oil nozzle to solve or alleviate at least one problem in the background art.

[0005] The technical solution of the present application is: an oil nozzle, comprising a nozzle body, an upper end of the nozzle body is provided with a nozzle mounting seat, the nozzle body can be fixedly connected with a bearing mounting seat through the nozzle mounting seat, a positioning section, an adapter section and an oil collecting section are sequentially arranged on the nozzle body below the lower side of the nozzle mounting seat, an oil supply pipe mounting hole, a first oil passage and a second oil passage are sequentially arranged along the axis of the nozzle body from top to bottom, a first oil collecting groove and a second oil collecting groove are arranged at the bottom of the nozzle body, the first oil collecting groove is communicated with a first oil injection hole and a second oil injection hole, and is used for jointly spraying oil to the gas generator turbine fulcrum bearing, the second oil collecting groove is communicated with a third oil injection hole, and is used for spraying oil to the power turbine fulcrum bearing.

[0006] In at least one embodiment of the present application, a plurality of bolt holes are arranged on the nozzle mounting seat, and the nozzle mounting seat is fixedly connected with the bearing mounting seat through the bolt holes.

[0007] In at least one embodiment of the present application, the positioning section has a circular outer diameter, and the positioning section and the bearing seat mounting hole are in clearance fit, thereby forming a positioning structure of the nozzle body on the bearing seat.

[0008] In at least one embodiment of the present application, the adapter section has a circular outer diameter, and the outer diameter of the adapter section is smaller than the outer diameter of the positioning section, and the adapter section and the positioning section are smoothly connected.

[0009] In at least one embodiment of the present application, the first oil passage has a rectangular cross section, and the first oil passage extends from the oil supply pipe mounting hole to the adapter section.

[0010] In at least one embodiment of the present application, the oil collecting section has a rectangular cross section, and the second oil passage has a rectangular shape, and the cross section of the second oil passage is larger than the cross section of the first oil passage.

[0011] In at least one embodiment of the present application, the first and second oil collecting grooves are staggered in the width or length direction of the second oil passage, and the center lines of the first and second oil collecting grooves point outward.

[0012] In at least one embodiment of the present application, the axis of the first oil injection hole is parallel to the center line of the first oil collecting groove, or the axis of the first oil injection hole forms a small angle with the center line of the first oil collecting groove, and the axis of the second oil injection hole is perpendicular or nearly perpendicular to the center line of the first oil collecting groove.

[0013] The axis of the third oil injection hole is perpendicular or nearly perpendicular to the center line of the second oil collecting groove.

[0014] In at least one embodiment of the present application, the small angle is an angle less than 30 degrees, and the nearly perpendicular is an angle in the range of 80 degrees to 110 degrees.

[0015] In at least one embodiment of the present application, the diameters of the oil injection holes are adjusted by calculating the oil flow area of each oil injection hole, so that the oil supply amount of the gas generator turbine fulcrum bearing and the power turbine fulcrum bearing meets the design requirements, and the direction of the oil injection is adjusted by adjusting the axis direction of each oil injection hole to meet the design requirements.

[0016] The oil injection nozzle provided by the present application can realize oil injection in two directions, effectively utilize the limited installation space, and complete the use requirements without arranging two oil injection nozzles. At the same time, the nozzle structure design is exquisite and detailed, which puts forward higher requirements for the processing and manufacturing process. If a simple two-nozzle design scheme is selected, the use and maintenance costs will increase accordingly, and the present application can reduce the manufacturing cost. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions provided by the present application, the following will briefly introduce the drawings. Obviously, the drawings described below are only some embodiments of the present application.

[0018] Figure 1 The overall schematic diagram of the oil nozzle of the present application.

[0019] Figure 2 The schematic diagram of the oil supply pipe mounting hole and the oil supply pipe mounting structure of the present application.

[0020] Figure 3 The top view of the oil nozzle of the present application.

[0021] Figure 4 The A-A direction schematic diagram based on Figure 1 .

[0022] Figure 5 The B-B direction schematic diagram based on Figure 1 .

[0023] Figure 6 The C-C direction schematic diagram based on Figure 5 .

[0024] Figure 7 The D-D direction schematic diagram based on Figure 5 . DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the present application more clear, the following will combine the drawings in the embodiments of the present application to make more detailed description of the technical solutions in the embodiments of the present application.

[0026] The present application provides an oil nozzle capable of realizing two-direction oil injection, which can realize the lubrication and cooling demand of two fulcrum bearings in a narrow space.

[0027] As shown in Figure 1 , the oil nozzle capable of realizing two-direction oil injection provided by the present application comprises a nozzle body 11, the upper end of the nozzle body 11 is provided with a transversely protruding nozzle mounting seat 12, the nozzle body 11 below the nozzle mounting seat 12 is sequentially formed with a positioning section 13, a switching section 14 and an oil collecting section 15, along the axis of the nozzle body 11, the upper side of the nozzle mounting seat 12 is provided with an oil supply pipe mounting hole 16, the inside of the nozzle body 11 is sequentially provided with a first oil passage 17 and a second oil passage 18 from top to bottom, and the lower end of the nozzle body 11 is provided with a plurality of oil injection holes 19.

[0028] As shown in Figure 2As shown, the oil supply pipe mounting hole 16 in this application is a circular stepped hole structure with a specific diameter. The lubricating oil mounting pipe 20 is installed within this circular stepped hole, thereby providing circumferential and radial positioning for the lubricating oil supply pipe 20. Depending on the outer diameter of the lubricating oil supply pipe 20, installation can be ensured by adjusting the inner diameter of the oil supply pipe mounting hole 16 or adding other components. For example, when the size of the oil supply pipe mounting hole 16 machined based on the outer diameter of the lubricating oil supply pipe 20 meets the requirements, the lubricating oil supply pipe 20 can be directly installed within the oil supply pipe mounting hole 16. If the size of the oil supply pipe mounting hole 16 machined based on the outer diameter of the lubricating oil supply pipe 20 does not meet the requirements, an adjustment washer or other structure can be installed on the outside of the lubricating oil supply pipe 20 and then installed within the oil supply pipe mounting hole 16, thereby achieving installation between the lubricating oil supply pipe 20 and the oil supply pipe mounting hole 16.

[0029] like Figure 3 As shown, the nozzle mount 12 in this application has a rectangular or circular cross-section. In this embodiment of the present application, the nozzle mount 12 is rectangular. The nozzle mount 12 is provided with multiple bolt holes 121 for mounting the nozzle body 11 on a bearing seat (not shown). For example, the rectangular nozzle mount 12 in this embodiment of the present application has four bolt holes 121, distributed at the four corners of the rectangle. This nozzle mount 12 radially positions the injector, and the nozzle body 11 is secured to the bearing seat using four bolts. The lower surface of the nozzle mount 12 forms a positioning surface. The tight fit between the positioning surface and the bearing seat ensures that the injector maintains radial clearance with the rotor in the confined space within the combustion engine, preventing collisions between the rotor and stator during operation. It is understood that if the nozzle mount 12 is circular, the bolt holes 121 can be distributed at a certain angle, for example, at 120° or 90°, thereby providing three or four bolt holes 121.

[0030] In this application, the outer diameter of positioning section 13 is circular, and it serves to position nozzle body 11 on the bearing seat, both axially and circumferentially. Positioning section 13 utilizes a specifically sized outer wall surface to create a small clearance with the bearing seat mounting hole, ensuring that the clearance between nozzle body 11 and the stator within the aircraft engine or combustion engine meets operational requirements. In some embodiments of this application, this small clearance can be set to 0.05mm to 0.1mm.

[0031] Combine Figure 1 and Figure 4As shown, the cross section of the adapter section 14 in the present application is circular, and by selecting a specific outer diameter size of the circular cross section, the structural rigidity of the nozzle body 11 can be improved to avoid local deformation during processing and use. In some embodiments of the present application, the outer diameter of the adapter section 14 is smaller than the outer diameter of the positioning section 13, and a circular chamfer or a 45-degree chamfer can be used for smooth transition between the two.

[0032] The first oil passage 17 extends from the oil supply pipe mounting hole 16 to the nozzle direction (i.e. the lower end), and at least extends to the adapter section 14. In the illustrated embodiment of the present application, the first oil passage 17 extends to about the middle of the adapter section 14. The adapter section 14 and the first oil passage 17 jointly form an oil flow passage, and the first oil passage 17 is limited by the assembly space size, and the passage structure is a rectangular cross section.

[0033] In combination Figure 1 and Figure 5 As shown, the oil collecting section 15 in the present application has a rectangular structure, and the oil collecting section 15 and the second oil passage 18 jointly form an oil collecting area. The upper end of the second oil passage 18 is connected to the first oil passage 17, and the lower end extends to the lower end of the nozzle body 11. The second oil passage 18 is a rectangular cross section, which is convenient for passing through the gap of related accessories to ensure that the bearing is provided with oil in a narrow space. In the present application, the cross section of the second oil passage 18 is larger than that of the first oil passage 17. In the present application, the cross section larger means that at least one of the long side and the short side of the second oil passage 18 is larger than the corresponding long side or short side of the first oil passage 17, and the other side of the second oil passage 18 is not less than the other side of the first oil passage 17.

[0034] In combination Figures 5 to 7 As shown, the bottom surface of the second oil passage 18 is provided with a first oil collecting groove 194 and a second oil collecting groove 195. The first oil collecting groove 194 is located at the upper left corner of the bottom surface of the second oil passage 18, and the second oil collecting groove 195 is located at the lower right corner of the bottom surface of the second oil passage 18. Both are distributed staggered in the width direction and the length direction, and the center lines of the first oil collecting groove 194 and the second oil collecting groove 195 both point to the outside. For example, in the embodiment of the present application, the center line of the first oil collecting groove 194 points to the lower left (based on the Figure 6 perspective), and the center line of the second oil collecting groove 195 points to the lower right (based on the Figure 7 perspective).

[0035] The bottom of the nozzle body 11 is respectively provided with an oil injection hole 19 communicating with a first oil collecting groove 194 and a second oil collecting groove 195, wherein the first oil injection hole 191 and the second oil injection hole 192 communicate with the first oil collecting groove 194, and the third oil injection hole 193 communicates with the second oil collecting groove 195. For example, in the embodiment of the present application, the axis of the first oil injection hole 191 is substantially parallel to the center line of the first oil collecting groove 194 or has a small angle therebetween, for example, the small angle can be set to be less than 30 degrees, the axis of the second oil injection hole 192 is substantially perpendicular to the center line of the first oil collecting groove 194 or is in a near-perpendicular state of 80-110 degrees therebetween; the axis of the third oil injection hole 193 is substantially perpendicular to the center line of the second oil collecting groove 195 or is in a near-perpendicular state of 80-110 degrees therebetween.

[0036] In the present application, the third oil injection hole 193 can spray oil to the power turbine fulcrum bearing by distributing design in the width direction of the bottom surface of the nozzle body 11, and the first oil injection hole 191 and the second oil injection hole 192 can jointly spray oil to the gas generator turbine fulcrum bearing. In the present application, the corresponding oil collecting groove is designed in the oil injection hole or the oil injection hole group for different purposes, so as to improve the flow supply capacity.

[0037] In the present application, the oil collecting groove is used in cooperation with the corresponding oil injection hole, the oil flow area of each oil injection hole is calculated, and the diameter of each oil injection hole is adjusted, so as to adjust the axis direction of each oil injection hole and make the oil injection direction meet the design requirements, thereby avoiding the negative influence of the early scattering of the oil mist and the reduction of the oil receiving efficiency (fulcrum bearing).

[0038] The oil injection nozzle provided by the present application can realize oil injection in two directions, can effectively utilize the limited installation space, and does not need to arrange two oil injection nozzles to complete the use requirement. At the same time, the nozzle structure design is exquisite and detailed, and higher requirements are put forward to the processing and manufacturing process. If a simple two-nozzle design scheme is selected, the use and maintenance costs will be increased accordingly, and the present application can reduce the manufacturing cost.

[0039] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. 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 in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A lubricating oil nozzle, characterized in that: The invention comprises a nozzle body (11), wherein the upper end of the nozzle body (11) is provided with a nozzle mounting seat (12), and the nozzle body (11) can be fixedly connected to the bearing mounting seat through the nozzle mounting seat (12); a positioning section (13), a transition section (14) and an oil collecting section (15) are sequentially provided on the nozzle body (11) below the nozzle mounting seat (12); an oil supply pipe mounting hole (16), a first lubricating oil channel (17) and a second lubricating oil channel (18) are sequentially provided along the axis of the nozzle body (11) from top to bottom; a first oil collecting groove (194) and a second oil collecting groove (195) are provided at the bottom of the nozzle body (11); the first oil collecting groove (194) is connected with a first oil spray hole (191) and a second oil spray hole (192) for jointly spraying lubricating oil to the gas generator turbine fulcrum bearing; the second oil collecting groove (195) is connected with a third oil spray hole (193) for spraying lubricating oil to the power turbine fulcrum bearing.

2. The oil nozzle according to claim 1, characterized in that The nozzle mounting seat (12) is provided with a plurality of bolt holes (121), and the nozzle mounting seat (12) is fixedly connected to the bearing mounting seat through the bolt holes (121).

3. The oil nozzle according to claim 1, wherein: The outer diameter of the positioning section (13) is circular, and the positioning section (13) is clearance-matched with the bearing seat mounting hole, thereby forming a positioning structure for the nozzle body (11) on the bearing seat.

4. The lubricating oil nozzle according to claim 3, characterized in that The outer diameter of the transition section (14) is circular, and the outer diameter of the transition section (14) is smaller than the outer diameter of the positioning section (13), and there is a smooth transition between the transition section (14) and the positioning section (13).

5. The lubricating oil nozzle according to claim 1, characterized in that: The cross section of the first lubricating oil channel (17) is rectangular, and the first lubricating oil channel (17) extends from the oil supply pipe mounting hole (16) at least to the transition section (14).

6. The lubricating oil nozzle according to claim 1, characterized in that The cross section of the oil collecting section (15) is rectangular, and the shape of the second lubricating oil channel (18) is rectangular, and the cross section of the second lubricating oil channel (18) is larger than the cross section of the first lubricating oil channel (17).

7. The lubricating oil nozzle according to any one of claims 1 to 6, characterized in that: The first oil collecting groove (194) and the second oil collecting groove (192) are staggered in the width or length direction of the second lubricating oil channel (18), and the center lines of the first oil collecting groove (194) and the second oil collecting groove (192) point outward.

8. The lubricating oil nozzle according to claim 7, characterized in that: The axis of the first oil injection hole (191) is parallel to the center line of the first oil collecting groove (194) or the axis of the first oil injection hole (191) and the center line of the first oil collecting groove (194) are at a small angle, and the axis of the second oil injection hole (192) is perpendicular or nearly perpendicular to the center line of the first oil collecting groove (194); The axis of the third oil injection hole (193) is perpendicular or nearly perpendicular to the center line of the second oil collecting groove (195).

9. The oil nozzle according to claim 8, characterized in that The small angle is an angle less than 30 degrees; the near vertical angle is an angle range of 80 degrees to 110 degrees.

10. The oil nozzle according to claim 8, characterized in that By calculating the lubricating oil flow area of ​​each oil injection hole and adjusting the diameter of each oil injection hole, the lubricating oil supply amount of the gas generator turbine pivot bearing and the power turbine pivot bearing meets the design requirements. By adjusting the axial direction of each oil injection hole, the lubricating oil injection direction meets the design requirements.

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