An oil circuit integrated centralized lubrication structure and design method for an NGW type planetary gear box

Abstract

This invention discloses an integrated centralized lubrication structure and design method for NGW-type planetary gearboxes, relating to the field of equipment lubrication technology. It includes an integrated plate-shaped structure body, an oil inlet, multiple oil outlets, and multiple internal oil passages disposed within the structure body. These internal oil passages connect the oil inlet to the multiple oil outlets and are configured to distribute lubrication according to the different lubrication requirements of the components to be lubricated, thereby achieving integrated lubrication of multiple components within a limited installation space. This structure can be designed to match the equipment installation space and is installed inside the equipment via positioning and detachable fixing structures. Compared to traditional external independent oil circuit structures, this invention has advantages such as high structural integration, flexible installation, high lubrication reliability, and convenient maintenance, and is suitable for lubrication systems of equipment such as aerospace planetary gear reducers.

Description

Technical Field

[0001] This invention relates to the field of equipment lubrication technology, and in particular to an integrated centralized lubrication structure and design method for NGW planetary gearboxes. Background Technology

[0002] In the field of aerospace power transmission, planetary gear reducers are widely used in power transmission systems due to their compact structure, high power density, high transmission efficiency, and strong load-bearing capacity. As aerospace equipment gradually develops towards higher power, higher speed, and lighter weight, planetary gear reducers generate significant frictional heat and contact loads in the gear meshing area and bearing components during operation. Therefore, a stable and reliable lubricating oil supply is required to ensure the lubrication, cooling, and long-term stable operation of the gear train and bearings.

[0003] Existing planetary gear reducers typically use oil injection lubrication systems that deliver lubricating oil to gear meshing points, bearings, and other lubrication areas via external oil pipes, internal oil passages, or oil injection structures. For multiple lubrication points, existing structures often require separate oil supply lines or passages to meet the lubrication needs of different components. However, due to the limited internal space of the reducer, arranging multiple independent oil circuits complicates the lubrication system structure, increases installation difficulty, and restricts the internal structural layout of the equipment.

[0004] Meanwhile, traditional lubrication circuits have numerous pipeline connection points. Under conditions of long-term equipment vibration, high-speed operation, and temperature changes, these connections may loosen, seal reliability may decrease, or lubricating oil may leak, thus affecting the stability of the lubrication system. Furthermore, when different lubrication points within the equipment require different amounts of lubricating oil, a single or distributed lubrication circuit structure cannot adequately meet the flow and pressure demands of different parts, easily leading to problems such as insufficient local lubrication, decreased oil pressure, or uneven lubrication distribution.

[0005] Furthermore, existing lubrication systems are typically interconnected with the internal structure of the equipment or external pipelines. When local oil circuits become blocked, worn, or malfunction, the repair and replacement process is cumbersome and maintenance efficiency is low. For space-constrained equipment such as aerospace planetary gear reducers with high reliability requirements, how to achieve integrated oil supply to multiple lubrication points within limited installation space, while reducing oil circuit complexity, improving installation flexibility, and enhancing maintenance convenience, has become a pressing technical problem to be solved in this field. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide an integrated centralized lubrication structure for NGW planetary gearboxes, so as to solve the problems of complex external oil circuit structure, large installation space occupation, poor lubrication flexibility, inconvenient maintenance and low operational reliability in existing lubrication systems, and improve the structural integration, lubrication stability and engineering adaptability of the lubrication system.

[0007] To achieve the above objectives, the present invention provides the following technical solution: In one possible implementation, an integrated centralized lubrication structure for an NGW-type planetary gearbox is provided, comprising: a structural body, the structural body being an integrated plate-shaped structure whose shape matches the internal installation space of the equipment; at least one positioning structure disposed on the structural body for positioning the structural body at a predetermined installation position inside the equipment; an oil inlet disposed on the structural body for connecting an external oil pipe to receive oil; multiple oil outlets disposed on the structural body for corresponding to the lubrication positions of different components to be lubricated in the equipment; and multiple internal oil passages disposed inside the structural body, the multiple internal oil passages connecting the oil inlet and the multiple oil outlets respectively; wherein the multiple internal oil passages are configured to divert flow according to the lubrication requirements of different components to be lubricated, so as to achieve integrated lubrication of multiple components to be lubricated within a limited installation space.

[0008] In one possible implementation, the shape of the structural body matches the internal installation space of the device, specifically: when the installation space has a circular cross-section, the structural body is a circular sheet; when the installation space has a rectangular cross-section, the structural body is a rectangular sheet.

[0009] In one possible implementation, the positioning structure is at least one of a positioning groove, a positioning hole, or a positioning boss. The structure body is fixed inside the equipment by a detachable fixing structure such as a retaining ring or bolts, so as to realize the quick installation, disassembly, and replacement of the structure body.

[0010] In one possible implementation, a first boss and a second boss are respectively provided on two opposite end faces of the structural body.

[0011] In one possible implementation, the lubricating oil inlet is a variable cross-section pipe, wherein the inner diameter of the upper portion of the lubricating oil inlet matches the outer diameter of the external oil pipe, and the inner diameter of the lower portion of the lubricating oil inlet matches the inner diameter of the external oil pipe.

[0012] In one possible implementation, the plurality of internal oil passages include a diversion structure and a plurality of oil outlet pipes, wherein the inlet of the diversion structure is connected to the lubricating oil inlet, and the plurality of diversion ports of the diversion structure are respectively connected to the inlets of the plurality of oil outlet pipes.

[0013] In one possible implementation, the diversion structure is bowl-shaped, with the plurality of diversion ports evenly distributed at the bottom of the bowl-shaped structure, and a small cone disposed in the center of the plurality of diversion ports.

[0014] In one possible implementation, the cross-sectional area of ​​the plurality of lubricating oil outlets is uniformly set according to the lubrication pressure requirements, and the plurality of oil outlet pipes are all smooth curved paths.

[0015] In one possible implementation, a design method for an integrated centralized lubrication structure for an NGW planetary gearbox is provided, comprising the following steps: determining the lubricating oil flow rate per unit time based on the lubrication requirements of different components to be lubricated under operating conditions; determining the structural parameters of the lubricating oil inlet in conjunction with the internal installation space dimensions of the equipment; determining the number of lubricating oil outlets and the corresponding cross-sectional area of ​​the lubricating oil outlets based on the amount of lubricating oil required by different components to be lubricated; and constructing an internal oil circuit and flow distribution structure based on the number of lubricating oil outlets and the corresponding cross-sectional area of ​​the lubricating oil outlets to achieve integrated lubrication of multiple components to be lubricated.

[0016] Based on the above technical solution, the present invention provides an integrated centralized lubrication structure for NGW planetary gearboxes. By integrating the lubricating oil inlet, internal oil passage, and multiple lubricating oil outlets within the plate-shaped structure body and designing a diversion system according to the lubrication requirements of different components, the integrated lubrication of multiple components is achieved within a limited installation space. This effectively reduces the complexity of the external oil passage in traditional lubrication systems and improves the installation flexibility, operational stability, and maintenance convenience of the lubrication structure.

[0017] Furthermore, by integrating multiple lubrication circuits into a single structural body, this invention replaces the traditional independent external oil pipe layout, reducing the number of connection nodes and external pipelines in the lubrication system. This reduces the risk of leakage, installation errors, and operational failures caused by complex oil circuit connections, thereby improving the overall reliability of the lubrication system.

[0018] Furthermore, the main body of the present invention adopts a sheet-shaped structure design that matches the equipment installation space. It can be adapted to the shape of the internal space of different equipment, so that the lubrication structure can achieve a high degree of integration in a limited space, thereby improving the utilization rate of the internal space of the equipment and enhancing the adaptability of the lubrication structure to different equipment platforms.

[0019] Furthermore, by setting up a positioning structure and a detachable fixing structure, the present invention enables the lubricating oil structure to be quickly installed in a predetermined position inside the equipment, and to be easily disassembled and replaced during subsequent maintenance, thereby reducing the difficulty and cost of equipment maintenance and improving the maintainability of the equipment during use.

[0020] Furthermore, by setting a unified lubricating oil inlet and an internal multi-path diversion structure, the lubricating oil entering the structure body can be reasonably distributed according to the lubrication needs of different lubrication parts, thereby ensuring that multiple components to be lubricated can obtain stable lubrication under different operating conditions, improving the stability of equipment operation and the lubrication effect.

[0021] Furthermore, by matching the number and cross-sectional area of ​​the lubricating oil outlets and the internal oil circuit parameters, this invention achieves differentiated oil supply to different lubrication points while ensuring the lubricating oil pressure. This avoids the problem of insufficient lubrication in certain areas due to oil pressure drop in traditional single oil circuit structures, thereby improving the lubrication reliability of the equipment under high-speed operation.

[0022] Furthermore, by designing the diversion structure as a bowl-shaped structure and setting small cones in the center of multiple diversion ports and flow guiding transition structures at the edges of the diversion ports, the present invention enables the lubricating oil to flow more smoothly into each oil outlet pipe during the diversion process, thereby reducing flow resistance and local pressure loss and improving the uniformity of lubricating oil distribution.

[0023] Furthermore, by designing multiple oil outlet pipes as smooth curved paths, the present invention reduces the flow resistance and flow impact of lubricating oil during the flow process, reduces lubricating oil pressure loss, improves lubricating oil delivery efficiency, and further enhances overall lubrication performance.

[0024] Furthermore, the lubrication structure design method proposed in this invention optimizes the lubrication inlet, lubrication outlet, and internal oil circuit parameters by combining equipment operating conditions, installation space, and lubrication oil requirements of different lubrication parts. This enables rapid matching of lubrication structure parameters, improves the design flexibility of the lubrication system, and enhances engineering application efficiency.

[0025] In summary, the oil circuit integrated centralized lubrication structure for NGW planetary gearboxes of the present invention has the advantages of high structural integration, strong installation flexibility, high lubrication reliability, convenient maintenance and good adaptability. It is particularly suitable for lubrication systems of equipment with high requirements for space layout, lubrication efficiency and operational reliability, such as aerospace planetary gear reducers. Attached Figure Description

[0026] Figure 1 This is a schematic diagram showing the installation position of the present invention in a gearbox; Figure 2 This is a schematic diagram of the structure of the present invention; Figure 3 This is a front view of the present invention; Figure 4 This is a front sectional view of the present invention; Figure 5 This is a partially enlarged cross-sectional view of the flow splitting structure of the present invention; Figure 6 This is a top view of the present invention; Figure 7 This is a partially enlarged top view of the flow splitting structure of the present invention; Figure 8 This is a right view of the present invention; Figure 9 This is a right sectional view of the present invention.

[0027] Wherein: 001, positioning groove; 002, external oil pipe; 003, retaining ring for hole; 101, lubricating oil inlet; 102, diversion structure; 103, first oil outlet pipe; 104, second oil outlet pipe; 105, third oil outlet pipe; 106, fourth oil outlet pipe; 107, first boss; 108, second boss; 109, return port; 110, first diversion port; 111, second diversion port; 112, third diversion port; 113, fourth diversion port. Detailed Implementation

[0028] To enable those skilled in the art to more clearly understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] It should be noted that the following embodiments are only used to explain the technical solutions of the present invention, and are not intended to limit the scope of protection of the present invention. Without departing from the technical concept of the present invention, those skilled in the art can make various modifications or improvements to its structural form, connection method, parameter settings, and application scenarios based on the content disclosed in the present invention, and such modifications or improvements should all fall within the scope of protection of the present invention.

[0030] Furthermore, in the description of this invention, terms such as "upper," "lower," "left," "right," "inner," and "outer" are used only to describe the orientation or positional relationship based on the state shown in the accompanying drawings, and are only used to facilitate the explanation of this invention and to simplify the description, and should not be construed as limiting the structure of this invention.

[0031] Meanwhile, the terms "first" and "second" mentioned in this invention are only used to distinguish different technical features and do not imply any limitation on the number, order, or importance of the technical features.

[0032] The following is combined with Figures 1 to 9 This invention provides a detailed description of an integrated centralized lubrication structure for an NGW-type planetary gearbox.

[0033] I. Overall Structure and Installation Relationship (in conjunction with) Figures 1-3 ) The following is combined with Figures 1 to 3 The overall structure and installation relationship of the oil circuit integrated lubrication structure of the present invention are described in detail.

[0034] like Figure 1 As shown, the integrated oil lubrication structure in this embodiment is applied to the planetary gear transmission system for lubricating the gear meshing area and bearing parts. Because the planetary gear transmission system generates significant frictional heat and contact stress during high-speed operation, a stable supply of lubricating oil is necessary to lubricate and cool the gears and bearings, ensuring the stability and service life of the transmission system.

[0035] In this embodiment, the lubricating structure adopts an integrated sheet structure design. By integrating multiple traditionally dispersed lubrication oil circuits into the same structural body, the overall complexity of the lubrication system is reduced, and the number of external oil pipes inside the equipment is reduced.

[0036] Furthermore, the external shape of the lubricating structure is designed to match the internal installation space of the equipment. In this embodiment, since the cross-section of the cavity inside the gearbox used to install the lubrication structure is circular, the lubricating structure is designed as a circular thin-plate structure to improve spatial adaptability and installation stability.

[0037] It is understood that in other embodiments, when the internal installation space of the device is rectangular or other irregular cross-section, the structural body of the lubricating oil structure can also be designed as a rectangular sheet structure or other adaptable structural form, and the present invention does not limit this.

[0038] like Figure 1 As shown, the lubricating structure is installed inside the gearbox near the bearing and gear meshing area, allowing the lubricating oil to be directly delivered to the area to be lubricated, thereby reducing the lubricating oil delivery path and improving lubrication efficiency and cooling effect.

[0039] Furthermore, a positioning groove 001 is provided inside the gearbox at the corresponding installation position. The lubricating structure completes the installation and positioning by cooperating with the positioning groove 001, so as to ensure the relative position accuracy of the lubrication structure after installation inside the equipment.

[0040] In this embodiment, the lubrication structure is axially fixed using a retaining ring 003, ensuring stable installation inside the gearbox and facilitating subsequent disassembly and maintenance. When blockage, wear, or other malfunctions occur in the lubrication structure, the entire structure can be replaced simply by removing the retaining ring 003, thereby reducing maintenance difficulty and costs.

[0041] like Figure 2 as well as Figure 3As shown, the lubricating structure as a whole includes a structural body, a lubricating oil inlet 101, multiple internal oil passages, and multiple lubricating oil outlets. The multiple internal oil passages are integrated inside the structural body and are used to deliver the input lubricating oil to different lubrication positions.

[0042] Furthermore, the main body of the structure is in the form of a thin sheet. Compared with the traditional external independent oil pipe structure, the present invention effectively reduces the internal space occupied by the equipment and reduces the number of external connection nodes of the lubricating oil circuit through the integrated internal oil circuit design, thereby reducing the risk of leakage and installation errors caused by too many connection structures.

[0043] Furthermore, this invention employs an integrated structural design, enabling the lubrication structure to be quickly replaced according to different equipment operating conditions. When different equipment operating states require different lubrication parameters, only the lubrication structure with the corresponding internal oil circuit parameters needs to be replaced to achieve rapid adaptation to different lubrication requirements, thereby improving the design flexibility of the lubrication system and the convenience of engineering applications.

[0044] II. Structural body and external connection structure (combined) Figures 2-4 ) The following is combined Figures 2 to 4 The structural body and external connection structure of the lubricating oil structure of the present invention are described in detail.

[0045] like Figures 2 to 4 As shown, the integrated oil lubrication structure mainly includes a structural body, an oil inlet 101, a diversion structure 102, multiple oil outlet pipes 103, 104, 105, 106, and an oil return port 109, etc., all of which are integrated inside the same structural body.

[0046] In this embodiment, the main body of the structure adopts an integrated sheet structure design, and multiple interconnected lubrication oil passages are formed inside to achieve centralized oil supply to multiple parts to be lubricated.

[0047] Furthermore, the main body of the structure adopts a thin-plate structure, which enables the internal oil circuit to be integrated within a limited installation space. Compared with the traditional external independent oil pipe structure, it can effectively reduce the internal space occupied by the equipment and reduce the number of external pipeline connections.

[0048] In this embodiment, the main body of the structure is a circular thin sheet structure, and its external dimensions are adapted to the internal installation space of the gearbox, thereby ensuring that the lubrication structure can be stably installed inside the gearbox.

[0049] It is understood that in other embodiments, the structure body may also be designed as a rectangular, polygonal or other irregular sheet structure depending on the different internal installation space of the device, and the present invention does not limit this.

[0050] like Figure 2 and Figure 3 As shown, the central area of ​​the structure body is provided with an oil inlet 101, which is used to connect to an external oil pipe 002 to deliver lubricating oil into the lubricating structure.

[0051] Furthermore, the structure body is provided with a diversion structure 102, which is located below the lubricating oil inlet 101 and is connected to multiple oil outlet pipes 103, 104, 105 and 106 respectively, for distributing the input lubricating oil to different lubrication positions.

[0052] like Figures 2 to 4 As shown, multiple oil outlet pipes 103, 104, 105, and 106 are respectively located in different areas inside the structure body and extend to the corresponding lubrication positions. The outlets of each oil outlet pipe constitute multiple lubricating oil outlets for spraying oil to lubricate gears, bearings, and other components that require lubrication.

[0053] Furthermore, an oil return port 109 is provided at the bottom of the structure body for the return of lubricating oil inside the equipment to form a complete lubrication circulation system.

[0054] like Figure 4 As shown, the two end faces of the structure body that are opposite to each other are respectively provided with a first boss 107 and a second boss 108.

[0055] The first boss 107 and the second boss 108 can improve the contact stability between the lubricating structure and the internal installation structure of the equipment, and play an auxiliary positioning role during the installation process, thereby improving the installation accuracy and operational stability of the lubrication structure.

[0056] Furthermore, in this embodiment, the structure body is installed in conjunction with the internal structure of the gearbox through the positioning groove 001 and the retaining ring 003 for the hole, so that the lubricating structure can be stably fixed in a designated position inside the equipment.

[0057] Furthermore, since the present invention adopts an independent integrated structure design, the entire lubrication structure can be quickly disassembled and replaced through the retaining ring 003 in the disassembly hole during subsequent equipment maintenance, without having to disassemble and reassemble a large number of external oil pipes one by one, thereby reducing the complexity of maintenance and improving maintenance efficiency.

[0058] Compared to the traditional decentralized lubrication circuit structure, the present invention integrates the lubricating oil inlet 101, the diversion structure 102 and multiple oil outlet pipes 103-106 into the same structural body, which effectively reduces the number of external connection nodes in the lubrication system, reduces the risk of lubricating oil leakage, and improves the overall structural compactness and operational reliability of the lubrication system.

[0059] III. Lubricating oil inlet structure (combined with...) Figure 4 ) The following is combined Figure 4 The lubricating oil inlet structure in the lubricating oil structure of the present invention will be described in detail.

[0060] like Figure 4 As shown, the lubricating oil inlet 101 is located in the upper region of the structure body and is connected to the external oil pipe 002 for inputting lubricating oil into the lubricating structure.

[0061] In this embodiment, the lubricating oil inlet 101 is a unified oil inlet for the entire lubricating structure, meaning that the lubricating oil required for bearing lubrication and gear lubrication is input into the structure body through the same lubricating oil inlet 101.

[0062] Compared to the traditional lubrication system with multiple independent oil inlet pipes supplying oil separately, this invention, by setting a unified lubricating oil inlet 101, can effectively reduce the number of external oil pipes and connection nodes, thereby reducing the complexity of the internal oil circuit layout and improving the overall integration of the lubrication structure.

[0063] Furthermore, the unified oil inlet 101 can reduce the number of external oil circuit interfaces, reduce the risk of leakage caused by multiple interface connections, and improve the operational reliability of the lubrication system.

[0064] like Figure 4 As shown, the lubricating oil inlet 101 adopts a variable cross-section pipe structure.

[0065] Specifically, the inner diameter of the upper part of the lubricating oil inlet 101 matches the outer diameter of the external oil pipe 002, so that the external oil pipe 002 can be stably inserted into the lubricating oil inlet 101, thereby improving the connection stability and sealing effect.

[0066] Furthermore, the inner diameter of the lower part of the lubricating oil inlet 101 is matched with the inner diameter of the external oil pipe 002 to ensure that the lubricating oil can maintain a relatively stable flow cross-sectional area after entering the lubricating oil inlet 101, thereby reducing local resistance and pressure loss during fluid flow.

[0067] The above-mentioned variable cross-section structure design can improve the flow stability of lubricating oil when it enters the structure body, while ensuring the installation stability of the external oil pipe 002, thereby improving the overall lubrication efficiency.

[0068] Furthermore, in this embodiment, the lubricating oil inlet 101 is arranged along the thickness direction of the structural body and is directly connected to the lower diversion structure 102, so that the lubricating oil entering the lubricating oil inlet 101 can quickly enter the diversion area.

[0069] Compared to traditional lubrication circuits with multi-stage transfer structures, this invention effectively reduces energy loss during lubrication flow and improves lubrication delivery efficiency by shortening the flow path of lubrication from the inlet to the distribution area.

[0070] Furthermore, since the lubricating oil inlet 101 is integrated, even if the internal space of the equipment is relatively compact during operation, the lubricating oil can be stably input, thereby improving the applicability of the present invention in high power density and high speed equipment.

[0071] In this embodiment, the lubricating oil inlet 101 and the structural body are integrally formed, so that there is no additional connection structure between the lubricating oil inlet 101 and the internal oil circuit. This reduces the sealing failure problem caused by too many interfaces in the traditional split oil circuit structure, and improves the overall structural reliability and long-term operational stability.

[0072] Furthermore, the diameter, length, and cross-sectional change parameters of the lubricating oil inlet 101 can be adjusted according to different equipment operating conditions to adapt to different lubricating oil flow and lubrication pressure requirements, thereby improving the engineering adaptability and design flexibility of the lubricating oil structure of the present invention.

[0073] IV. Diversion Structure (Combined) Figure 4 , Figure 5 , Figure 7 ) The following is combined Figure 4 , Figure 5 as well as Figure 7 The flow-diverting structure in the lubricating oil structure of the present invention will be described in detail.

[0074] like Figure 4 As shown, a diversion structure 102 is provided below the lubricating oil inlet 101. The diversion structure 102 is used to distribute the lubricating oil input from the lubricating oil inlet 101 to multiple oil outlet pipes 103, 104, 105, and 106 to achieve oil supply and lubrication for different lubrication parts.

[0075] In this embodiment, the diversion structure 102 is located in the central region inside the structure body and at the confluence of multiple oil outlet pipes 103, 104, 105, and 106, thereby enabling the lubricating oil to be centrally diverted inside the structure body.

[0076] Furthermore, the inlet of the diversion structure 102 is directly connected to the lubricating oil inlet 101, so that the lubricating oil can quickly enter the diversion area after entering the structure body, thereby reducing the length of the lubricating oil delivery path and the loss of flow energy.

[0077] like Figure 5As shown, the flow distribution structure 102 is generally bowl-shaped, and a flow guiding cavity for lubricating oil distribution is formed inside it.

[0078] Compared with the traditional planar flow splitting structure, the bowl-shaped structure can form a more stable flow state after the lubricating oil enters the flow splitting area, thereby reducing the local velocity changes and pressure fluctuations of the lubricating oil during the flow splitting process and improving the flow stability of the lubricating oil.

[0079] Furthermore, such as Figure 5 and Figure 7 As shown, multiple branch ports 110, 111, 112, and 113 are evenly distributed in the bottom area of ​​the bowl-shaped structure, and each branch port is connected to the corresponding oil outlet pipes 103, 104, 105, and 106.

[0080] By evenly distributing multiple distribution ports, lubricating oil can enter each oil outlet pipe as evenly as possible during the distribution process, thereby reducing the problem of insufficient oil supply or unstable local oil pressure at some lubrication points.

[0081] Furthermore, small conical structures are provided in the central areas of multiple diversion ports 110, 111, 112, and 113.

[0082] The small conical structure can guide the lubricating oil entering through the lubricating oil inlet 101, so that the lubricating oil disperses and flows around along the outer surface of the cone after entering the diversion area, thereby reducing the problem of local flow concentration caused by the lubricating oil directly impacting a single diversion port.

[0083] At the same time, by setting a small conical structure, the probability of lubricating oil forming eddies or local backflow in the distribution area can be reduced, thereby improving the uniformity of lubricating oil distribution and flow stability.

[0084] Furthermore, such as Figure 5 As shown, each of the branch ports 110, 111, 112, and 113 has a rounded corner structure at its edge.

[0085] By setting a rounded corner structure, the flow separation phenomenon generated when the lubricating oil flows through the edge of the diversion port can be reduced, thereby reducing local flow resistance and energy loss, and improving the flow smoothness of the lubricating oil when it enters the oil outlet pipe.

[0086] In addition, the rounded corner structure can reduce the scouring effect on the edge of the flow divider during the high-speed flow of lubricating oil, thereby improving the structural reliability and durability of the flow divider structure 102 during long-term operation.

[0087] In this embodiment, the diversion structure 102 and the main body are integrally formed, so that there are no additional connection gaps between the diversion structure 102, the lubricating oil inlet 101 and the multiple oil outlet pipes, thereby reducing the risk of lubricating oil leakage caused by the failure of sealing at the connection parts in the traditional split structure.

[0088] Furthermore, the dimensions, number of flow dividers, and cross-sectional area of ​​the flow divider structure 102 can be adjusted according to the operating conditions of different equipment to meet the differentiated requirements of different lubrication parts for lubricating oil flow and pressure.

[0089] For example, in applications where gear lubrication requirements are high, the number or cross-sectional area of ​​the corresponding flow dividers can be increased appropriately; while in applications where bearing lubrication requirements are high, the flow divider parameters can be adjusted for the corresponding oil outlet pipes to achieve targeted distribution of lubricating oil.

[0090] Compared to the traditional single-path oil supply structure, the present invention, by setting up a diversion structure 102 and multiple evenly distributed diversion ports, can not only improve the stability of lubricating oil supply, but also achieve synchronous lubrication of multiple lubrication parts, thereby improving the overall reliability of the lubrication system and the stability of equipment operation.

[0091] V. Oil outlet pipeline structure (in conjunction with) Figure 4 , Figure 8 , Figure 9 ) The following is combined Figure 4 , Figure 8 as well as Figure 9 The oil outlet pipe structure in the lubricating structure of the present invention will be described in detail.

[0092] like Figure 4 As shown, the diversion structure 102 is connected to multiple oil outlet pipes 103, 104, 105 and 106 below, and the multiple oil outlet pipes correspond to different lubrication positions, which are used to deliver the diverted lubricating oil to the gear meshing area and the bearing waiting lubrication part.

[0093] In this embodiment, the first oil outlet pipe 103, the second oil outlet pipe 104, the third oil outlet pipe 105 and the fourth oil outlet pipe 106 are respectively disposed in different areas inside the structure body and extend to the corresponding lubrication position along a preset path.

[0094] Furthermore, each oil outlet pipe is connected to the corresponding diversion port 110, 111, 112, 113, so that the lubricating oil output by the diversion structure 102 can stably enter the corresponding oil outlet pipe.

[0095] like Figure 8 as well as Figure 9As shown, all oil outlet pipes 103 to 106 adopt a smooth curve path design.

[0096] Compared to the traditional right-angle turn-type oil circuit structure, the present invention adopts a smooth curved path, which can effectively reduce the local resistance and fluid impact of lubricating oil during the flow process, thereby reducing the pressure loss of lubricating oil during the flow process.

[0097] Furthermore, a smooth curve path can reduce the probability of turbulence in lubricating oil under high-speed flow conditions, thereby improving the stability and flow uniformity of lubricating oil delivery.

[0098] In this embodiment, each oil outlet pipe 103-106 is designed with path optimization according to different lubrication positions, so that the lubricating oil can be delivered to the corresponding lubrication area with a shorter flow path, thereby further improving lubrication efficiency.

[0099] Furthermore, the outlets of each oil outlet pipe 103 to 106 constitute multiple lubricating oil outlets, and each lubricating oil outlet is aligned with the gear meshing area and the bearing lubrication area to achieve oil injection lubrication.

[0100] Through the above structural design, lubricating oil can be directly sprayed onto the surface of the parts to be lubricated, thereby improving the coverage of the lubricating oil on the gear meshing area and the bearing contact area, and improving the lubrication and cooling capacity.

[0101] Furthermore, in this embodiment, the cross-sectional area of ​​the multiple lubricating oil outlets is uniformly set according to the lubrication pressure requirements.

[0102] By standardizing the cross-sectional area of ​​multiple lubricating oil outlets, the problem of uneven local flow caused by differences in flow resistance at different outlets can be reduced, thereby improving the stability of oil supply between multiple lubrication points.

[0103] At the same time, the lubricating oil supply capacity at different lubrication points can be optimized by adjusting the number of lubricating oil outlets and the outlet cross-sectional area parameters, according to the different operating conditions of the equipment.

[0104] For example, in gear meshing areas with high heat generation or high speed, the number of outlets of the corresponding oil outlet pipes can be increased or the outlet cross-sectional area can be enlarged to improve the lubricating oil supply capacity in that area; for parts with low lubrication demand, the corresponding outlet parameters can be appropriately reduced to achieve reasonable distribution of lubricating oil.

[0105] Furthermore, in this embodiment, each oil outlet pipe 103-106 is integrally formed with the structural body, so that multiple oil outlet pipes can be directly integrated into the interior of the structural body.

[0106] Compared to traditional lubrication structures that use independent oil pipe connections, this invention can reduce the number of external oil pipes and connection nodes, thereby reducing the risk of lubricating oil leakage and improving the overall structural compactness.

[0107] In addition, since multiple oil outlet pipes are located inside the structure, it can effectively avoid problems such as loosening, wear and breakage that occur with traditional exposed oil pipes during equipment vibration or long-term operation, thereby improving the long-term reliability of the lubrication system.

[0108] In this embodiment, the paths of the multiple oil outlet pipes 103 to 106 can be adjusted according to different equipment structure forms.

[0109] For example, in different models of planetary gear reducers, the paths of each oil outlet pipe can be redesigned according to the changes in the positions of the gears and bearings to ensure that the lubricating oil outlet can always accurately correspond to the position to be lubricated, thereby improving the adaptability of the lubricating oil structure of the present invention and the flexibility of engineering applications.

[0110] In summary, by adopting an integrated oil outlet pipeline structure with a smooth curved path, this invention not only improves the lubricating oil delivery efficiency and lubrication stability, but also effectively reduces the installation difficulty and operational failure risk caused by traditional complex external oil circuit structures, thereby enhancing the reliability and practicality of the overall lubrication system.

[0111] VI. Lubrication Parameter Design Method The following is a detailed description of the lubrication parameter design method in the oil circuit integrated lubrication structure of the present invention.

[0112] In this embodiment, in order to meet the lubrication needs of different parts to be lubricated under different operating conditions, a lubrication parameter design method under overall structural constraints is introduced in the lubricating oil structure design process. By comprehensively considering the equipment operating conditions, installation space limitations and lubricating oil pressure requirements, the parameters of the lubricating oil inlet, the diversion structure and multiple oil outlet pipes are optimized as a whole.

[0113] Specifically, in the initial stage of lubrication structure design, the total flow rate of lubricating oil per unit time is determined based on the lubrication requirements of different parts to be lubricated under the operating conditions of the equipment.

[0114] In this embodiment, the parts to be lubricated mainly include the gear meshing area and the bearing area. Since the frictional heat, rotational speed and contact load generated by different parts during operation are different, the requirements of lubricating oil flow and lubrication pressure of different lubrication parts are also different.

[0115] For example, under high-speed operation, the gear meshing area usually requires a large flow of lubricating oil to achieve heat dissipation and lubrication, while the bearing area requires stable lubricating oil pressure to ensure stable formation of the lubricating film.

[0116] Therefore, in this embodiment, by analyzing the operating conditions of different lubrication points, the required amount of lubricating oil Ln per unit time for each lubrication point is determined, and the total lubricating oil flow rate required by the overall lubrication system per unit time is further calculated.

[0117] Furthermore, after determining the total flow rate of lubricating oil, the structural parameters of the lubricating oil inlet 101 are designed in conjunction with the internal installation space dimensions of the equipment.

[0118] In this embodiment, due to the limited internal installation space of the equipment, the lubricating oil inlet 101 adopts a single inlet structure to reduce the number of external oil pipes and space occupation.

[0119] Meanwhile, the diameter, length, and cross-sectional variation parameters of the lubricating oil inlet 101 are designed to match the lubricating oil flow requirements and installation thickness limitations.

[0120] Furthermore, in this embodiment, the lubricating oil inlet 101 adopts a variable cross-section pipe structure. By adjusting the cross-sectional area parameters of different regions of the inlet, the flow stability of the lubricating oil when entering the interior of the structure body is improved, and the local pressure loss during the flow process is reduced.

[0121] After completing the parameter design of the lubricating oil inlet 101, the number of multiple lubricating oil outlets and their cross-sectional areas are designed according to the amount of lubricating oil required for different lubrication locations.

[0122] Specifically, the required amount of lubricating oil Ln at different lubrication locations is used as a constraint. By analyzing the flow state of lubricating oil and the changes in lubrication pressure under different outlet parameters, multiple sets of lubricating oil outlet numbers M and corresponding outlet cross-sectional areas s are calculated.

[0123] Furthermore, by comprehensively comparing the lubrication effect, lubricating oil pressure stability, and installation space occupancy under different parameter combinations, the final number of lubricating oil outlets and outlet cross-sectional area parameters are determined.

[0124] In this embodiment, to ensure stable lubrication pressure among multiple lubrication points, the cross-sectional area of ​​multiple lubricating oil outlets is designed in a uniform manner, thereby reducing the problem of uneven flow distribution caused by differences in outlet flow resistance.

[0125] Furthermore, after determining the lubricating oil outlet parameters, an internal oil passage and a diversion structure 102 are constructed based on the positional relationship between the lubricating oil inlet 101 and each lubricating oil outlet.

[0126] In this embodiment, by adopting a bowl-shaped flow splitting structure and a smooth curved path oil outlet pipe structure, the local resistance and flow impact of lubricating oil during the flow process are reduced, thereby improving the stability of lubricating oil delivery and the uniformity of flow.

[0127] Meanwhile, depending on the operating conditions of different equipment, the dimensions of the diversion structure 102, the number of diversion ports, the length of the oil outlet pipe, and the bending radius can be adjusted to achieve rapid adaptation to the lubrication needs of different equipment.

[0128] For example, when the equipment speed increases, the number of lubricating oil outlets or the outlet cross-sectional area can be appropriately increased to improve the overall lubricating oil supply capacity; when the equipment installation space is limited, the space utilization rate can be optimized by adjusting the internal oil circuit layout.

[0129] Furthermore, in this embodiment, by integrating the internal oil circuit design, the number of external connection nodes in the traditional distributed oil circuit structure can be reduced, thereby reducing the risk of lubricating oil leakage and improving the overall reliability of the lubrication system.

[0130] Compared to traditional empirical lubrication structure design methods, this invention introduces a lubrication parameter design method under overall structural constraints, achieving synergistic optimization among lubricating oil inlet parameters, flow splitting structure parameters, and lubricating oil outlet parameters, thereby improving the rationality of lubrication structure design and its adaptability to engineering applications.

[0131] In summary, the lubrication parameter design method proposed in this invention can design the internal parameters of the lubrication structure in a targeted manner according to different equipment operating conditions and lubrication requirements, thereby achieving stable lubrication of multiple parts to be lubricated, improving equipment operating reliability and the overall performance of the lubrication system.

[0132] VII. Summary of Overall Technical Results In summary, the present invention provides an integrated centralized lubrication structure for an NGW planetary gearbox, which integrates the lubricating oil inlet 101, the diversion structure 102, and multiple oil outlet pipes 103-106 into the same structural body, thereby achieving centralized oil supply and integrated lubrication for multiple parts to be lubricated.

[0133] Compared to the traditional structure that uses multiple independent external oil pipes for lubrication, this invention effectively reduces the number of internal and external oil pipes and connection nodes through an internal integrated oil circuit design. This reduces the overall structural complexity of the lubrication system and decreases the risk of lubricating oil leakage due to excessive connection points.

[0134] Furthermore, the present invention adopts a sheet-like structure body design and is matched with the internal installation space of the equipment, so that the lubrication structure can complete a highly integrated oil circuit layout within a limited installation space, thereby improving the internal space utilization rate of the equipment, and is especially suitable for high-speed transmission equipment with limited internal space, such as aerospace planetary gear reducers.

[0135] Meanwhile, by setting a unified lubricating oil inlet 101 and an internal multi-path distribution structure 102, the present invention enables the lubricating oil to be rationally distributed according to the lubrication needs of different parts to be lubricated, thereby improving the oil supply stability between multiple lubrication positions and avoiding the problems of insufficient local lubrication or unstable lubrication pressure in the traditional single-path oil supply structure.

[0136] Furthermore, by employing a bowl-shaped flow divider structure 102, a small conical flow guide structure, and an oil outlet pipe structure with a smooth curved path, the present invention effectively reduces the local flow resistance and pressure loss of lubricating oil during the flow process, improves the lubricating oil delivery efficiency and flow distribution uniformity, thereby improving the overall lubrication effect and equipment operation stability.

[0137] Furthermore, by integrating multiple oil outlet pipes 103 to 106 inside the structural body, this invention can effectively avoid problems such as loosening, wear, and breakage of traditional exposed oil pipes under long-term vibration and high-speed operation conditions, thereby improving the long-term operational reliability and structural stability of the lubrication system.

[0138] Furthermore, the present invention adopts a detachable installation method. The lubricating structure can be installed and fixed by means of positioning groove 001 and hole retaining ring 003. When the lubrication structure is blocked, worn or other faults occur, it can be quickly disassembled and replaced, thereby reducing maintenance difficulty and maintenance cost and improving equipment maintenance efficiency.

[0139] Meanwhile, the lubrication parameter design method proposed in this invention comprehensively considers the equipment operating conditions, installation space, and lubrication requirements of different lubrication parts, and optimizes the overall design of lubricating oil inlet parameters, flow splitting structure parameters, and lubricating oil outlet parameters, thereby improving the rationality of lubrication structure design and adaptability under different operating conditions.

[0140] Therefore, this invention has the advantages of high structural integration, strong installation flexibility, good lubrication stability, high operational reliability, convenient maintenance, and strong engineering adaptability, and can be widely used in the lubrication systems of aerospace planetary gear reducers and other high-speed, high-power-density equipment.

[0141] It should be noted that the above embodiments are merely preferred embodiments of the present invention, used to illustrate the technical solution of the present invention, and are not intended to limit the scope of protection of the present invention.

[0142] For those skilled in the art, various modifications, substitutions, or equivalent transformations can be made to the structural form, oil circuit layout, diversion structure, installation method, and parameter settings of the present invention without departing from the technical principles and concept of the present invention. All such modifications, substitutions, or equivalent transformations should fall within the protection scope defined by the claims of the present invention.

[0143] Furthermore, the technical features in the various embodiments described in the specification and drawings of this invention can be combined or replaced in any way without contradicting each other, and the resulting technical solutions also fall within the protection scope of this invention.

[0144] The terms “first,” “second,” and “multiple” used in this specification are only used to distinguish different technical features and should not be construed as limitations on quantity, order, or importance.

[0145] The specific structural dimensions, material parameters, flow parameters, and installation methods involved in this invention can be adapted to meet actual application requirements, and this invention does not limit them.

[0146] Therefore, the scope of protection of this invention should be determined by the claims.

Claims

1. An integrated centralized lubrication structure for an NGW-type planetary gearbox, characterized in that, include: A structural body, wherein the structural body is an integrated sheet structure and its shape matches the internal installation space of the equipment; At least one positioning structure is disposed on the structure body for positioning the structure body at a predetermined installation position inside the device; An oil inlet (101) is provided on the main body of the structure for connecting an external oil pipe (002) to receive oil; Multiple lubricating oil outlets are provided on the main body of the structure to correspond to the lubrication positions of different parts to be lubricated in the equipment; In addition, multiple internal oil passages are provided inside the structure body, and the multiple internal oil passages connect the lubricating oil inlet (101) to the multiple lubricating oil outlets respectively; The multiple internal oil circuits are configured to divert flow according to the lubrication requirements of different components to be lubricated, so as to achieve integrated lubrication of multiple components to be lubricated within a limited installation space.

2. The integrated centralized lubrication structure for an NGW planetary gearbox according to claim 1, characterized in that, The shape of the structural body matches the internal installation space of the device, specifically: when the installation space has a circular cross-section, the structural body is a circular sheet; when the installation space has a rectangular cross-section, the structural body is a rectangular sheet.

3. A centralized lubrication structure for an NGW-type planetary gearbox according to claim 1, characterized in that, The positioning structure is at least one of positioning groove (001), positioning hole or positioning boss. The structure body is fixed inside the equipment by a detachable fixing structure such as retaining ring or bolt, so as to realize the quick installation and disassembly replacement of the structure body.

4. The integrated centralized lubrication structure for an NGW planetary gearbox according to claim 1, characterized in that, The structure body has a first boss (107) and a second boss (108) respectively on its two opposite end faces.

5. The integrated centralized lubrication structure for an NGW planetary gearbox according to claim 1, characterized in that, The lubricating oil inlet (101) is a variable cross-section pipe. The inner diameter of the upper part of the lubricating oil inlet (101) matches the outer diameter of the external oil pipe (002), and the inner diameter of the lower part of the lubricating oil inlet (101) matches the inner diameter of the external oil pipe (002).

6. The integrated centralized lubrication structure for an NGW planetary gearbox according to claim 1, characterized in that, The multiple internal oil passages include a diversion structure (102) and multiple oil outlet pipes (103, 104, 105, 106). The inlet of the diversion structure (102) is connected to the lubricating oil inlet (101), and the multiple diversion ports (110, 111, 112, 113) of the diversion structure (102) are respectively connected to the inlets of the multiple oil outlet pipes (103, 104, 105, 106).

7. The integrated centralized lubrication structure for an NGW planetary gearbox according to claim 6, characterized in that, The diversion structure (102) is bowl-shaped, and the multiple diversion ports (110, 111, 112, 113) are evenly distributed at the bottom of the bowl-shaped structure, and a small cone is provided in the center of the multiple diversion ports.

8. The integrated centralized lubrication structure for an NGW planetary gearbox according to claim 6, characterized in that, The cross-sectional area of ​​the multiple lubricating oil outlets is uniformly set according to the lubrication pressure requirements, and the multiple oil outlet pipes (103, 104, 105, 106) are all smooth curved paths.

9. A design method for an integrated centralized lubrication structure for an NGW-type planetary gearbox, characterized in that, Includes the following steps: Determine the lubricating oil flow rate per unit time based on the lubrication requirements of different components under operating conditions; The structural parameters of the lubricating oil inlet are determined based on the internal installation space dimensions of the equipment; The number of lubricating oil outlets and the corresponding cross-sectional area of ​​the lubricating oil outlets are determined according to the amount of lubricating oil required by different components to be lubricated. An internal oil passage and flow distribution structure are constructed based on the number of lubricating oil outlets and the corresponding cross-sectional area of ​​the lubricating oil outlets to achieve integrated lubrication of multiple components to be lubricated.

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