Spline lubrication structure and transmission system

Abstract

The application belongs to the field of helicopter transmission system, and particularly relates to a spline lubricating structure and a transmission system. In the spline lubricating structure, a first shaft cavity of an inner spline shaft is communicated with an inlet of a first lubricating flow channel, an outlet of the first lubricating flow channel is communicated with a second shaft cavity of an outer spline shaft, the second shaft cavity of the outer spline shaft is communicated with an inlet of a second lubricating flow channel, and an outlet of the second lubricating flow channel is communicated with an inlet of a third lubricating flow channel. The spline lubricating structure can make the lubricating oil lubricate the spline along a certain track, has a good lubricating effect on the spline, and improves the service life of the spline.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of helicopter transmission system, and particularly relates to a spline lubricating structure and transmission system. BACKGROUND

[0002] The spline coupling is widely applied in the helicopter transmission system due to the advantages of good guiding and centering, symmetrical stress, large multi-key tooth contact bearing capacity, small tooth root stress concentration and the like.

[0003] At present, the lubricating mode adopted in the helicopter transmission system is generally to set a nozzle in a static part (such as a casing), and to spray lubricating oil through the nozzle to lubricate the friction pairs (gears, bearings, splines and the like), or (part of high-speed bearing lubrication, spline) to spray oil into a hollow shaft cavity through the nozzle to realize ring-under centrifugal oil lubrication by centrifugal force generated by high rotation speed of the shaft. However, the lubricating oil cannot be lubricated along a fixed track by the above-mentioned lubricating method, which leads to poor lubricating effect and makes the spline prone to damage.

[0004] In view of this, the application is proposed. SUMMARY

[0005] In order to solve the technical problems in the prior art, the application provides a spline lubricating structure and transmission system. The spline lubricating structure can lubricate the spline along a certain track, has good lubricating effect on the spline, and improves the service life of the spline.

[0006] The application includes the following technical solutions:

[0007] The application provides a spline lubricating structure, which comprises an inner spline shaft, an outer spline shaft, an oil guide ring, an oil sealing ring and a sealing seat.

[0008] The outer spline shaft is sleeved with the inner spline shaft, and the outer spline of the outer spline shaft and the inner spline of the inner spline shaft form a first lubricating flow channel.

[0009] The inner spline shaft is sleeved with the oil guide ring, and a second lubricating flow channel is arranged between the outer surface of the inner spline shaft and the inner surface of the oil guide ring.

[0010] The oil guide ring is sleeved with the oil sealing ring, and a third lubricating flow channel is arranged between the outer surface of the oil guide ring and the inner surface of the oil sealing ring.

[0011] The oil sealing ring is externally provided with the sealing seat, and the sealing seat is connected with a casing shell.

[0012] The first shaft cavity of the inner spline shaft is communicated with the inlet of the first lubricating flow channel, the outlet of the first lubricating flow channel is communicated with the second shaft cavity of the outer spline shaft, the second shaft cavity of the outer spline shaft is communicated with the inlet of the second lubricating flow channel, and the outlet of the second lubricating flow channel is communicated with the inlet of the third lubricating flow channel.

[0013] Further, one end of the inner spline shaft is provided with an outer spline, and the other end is provided with a first oil inlet; the first oil inlet is communicated with the first shaft cavity.

[0014] Further, a positioning shoulder is arranged at one end of the outer surface of the inner spline shaft, and a thread is arranged at the other end; the axial positioning of the oil sealing ring is realized by cooperation of the positioning shoulder and the thread.

[0015] Further, a positioning ring is further included, the positioning ring is sleeved on the outer spline shaft; one end of the positioning ring is abutted with the positioning shoulder, and the other end is abutted with one end of the oil guide ring; the other end of the oil guide ring is abutted with a locking bolt, and the locking bolt is connected with the thread.

[0016] Further, the second shaft cavity is sealed at both ends.

[0017] Further, an oil plug mounting shoulder and an oil dam mounting shoulder are arranged in the second shaft cavity, the oil plug mounting shoulder is connected with an oil plug, and the oil dam mounting shoulder is connected with an oil dam.

[0018] Further, a second oil inlet and a second oil outlet are arranged on the outer spline shaft, and the second oil inlet and the second oil outlet are located between the oil plug and the oil dam;

[0019] A first oil outlet is arranged on the inner spline shaft and communicated with the second oil outlet;

[0020] The second shaft cavity is communicated with the first lubricating flow channel through the second oil inlet, and the second shaft cavity is communicated with the second lubricating flow channel through the first oil outlet and the second oil outlet.

[0021] Further, a third oil outlet is arranged on the oil guide ring, and the second lubricating flow channel is communicated with the third lubricating flow channel through the third oil outlet.

[0022] Further, a sealing ring is arranged between the sealing seat and the oil sealing ring.

[0023] The second aspect of the present application provides a transmission system comprising the spline lubricating structure.

[0024] By adopting the above technical solution, the present application has the following advantages:

[0025] 1. The spline lubrication structure of the present invention enables the lubricating oil to lubricate the spline along a certain trajectory, resulting in good lubrication effect and improved service life of the spline.

[0026] 2. This invention provides good lubrication for splines and has a maintenance effect on splines; at the same time, the lubricating oil that is lubricated through a certain trajectory has the effect of oil inlet and oil return, and the returned oil can be reused. It can also carry away the heat of the splines, thus solving the heat dissipation problem of splines.

[0027] 3. The lubricating oil of the present invention can form a circulating lubrication. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a spline lubrication structure according to an embodiment of the present invention. Figure 1 ;

[0030] Figure 2 This is a schematic diagram of a spline lubrication structure according to an embodiment of the present invention. Figure 2 ;

[0031] Figure 3 This is a schematic diagram of the internal spline shaft in an embodiment of the present invention;

[0032] Figure 4 This is a schematic diagram of the external spline shaft in an embodiment of the present invention;

[0033] Figure 5 This is a schematic diagram of the oil plug structure in an embodiment of the present invention;

[0034] Figure 6 This is a schematic diagram of the oil dam structure in an embodiment of the present invention;

[0035] Figure 7 This is a schematic diagram of the oil guide ring in an embodiment of the present invention;

[0036] Figure 8 This is a schematic diagram of the oil sealing ring in an embodiment of the present invention;

[0037] In the drawings: 10 - inner spline shaft, 110 - first shaft cavity, 120 - first oil inlet, 130 - first oil outlet, 140 - positioning shoulder, 150 - thread, 160 - locking bolt, 20 - outer spline shaft, 210 - second shaft cavity, 220 - oil plug mounting shoulder, 230 - oil dam mounting shoulder, 240 - oil plug, 250 - oil dam, 260 - second oil inlet, 270 - second oil outlet, 280 - outer spline, 30 - oil guide ring, 310 - third oil outlet, 40 - oil seal ring, 50 - sealing seat, 510 - sealing ring, 60 - first lubricating flow channel, 70 - second lubricating flow channel, 80 - third lubricating flow channel, 90 - casing shell, 100 - positioning ring. DETAILED DESCRIPTION

[0038] The following description provides many different embodiments, or examples, for implementing different features of the application. Some embodiments can be described without these specifically recited features and / or embodiments. That is, devices, systems, articles, materials, kits, and / or methods that do not include the specific features or embodiments can be apparatuses and / or methods that are still within the scope of the application. None of the examples are intended to exclude any other embodiments. The following description includes specific details for the purpose of providing a thorough understanding of the embodiments of the application. However, it will be apparent to those skilled in the art that the application can be practiced without these specific details. In some instances, well-known structures and devices are shown in block diagram form, rather than in detail, in order to avoid obscuring the embodiments of the application.

[0039] In the description of the application, it needs to be understood that the terms "inner", "outer", and the like indicate the positional or location relationship based on the positional or location relationship shown in the drawings, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features.

[0040] In the description of the application, it needs to be understood that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of multiple elements or the interaction relationship between multiple elements. For those skilled in the art, the specific meaning of the above terms in the application can be understood as the specific circumstances.

[0041] In order to make the objects, technical solutions, and advantages of the embodiments of the application clearer, the technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without making creative efforts fall within the scope of protection of the application.

[0042] As Figure 1 shown, the embodiment provides a spline lubrication structure, comprising an inner spline shaft 10, an outer spline shaft 20, an oil guide ring 30, an oil sealing ring 40 and a sealing seat 50; the outer spline shaft 20 is sleeved with the inner spline shaft 10, and the outer spline 280 of the outer spline shaft 20 and the inner spline of the inner spline shaft 10 form a first lubrication flow channel 60; the inner spline shaft 10 is sleeved with the oil guide ring 30, and a second lubrication flow channel 70 is arranged between the outer surface of the inner spline shaft 10 and the inner surface of the oil guide ring 30; the oil guide ring 30 is sleeved with the oil sealing ring 40, and a third lubrication flow channel 80 is arranged between the outer surface of the oil guide ring 30 and the inner surface of the oil sealing ring 40; the oil sealing ring 40 is externally provided with a sealing seat 50, and the sealing seat 50 is fixedly connected with a gearbox shell 90; as Figure 2 shown, the first shaft cavity 110 of the inner spline shaft 10 is in communication with the inlet of the first lubrication flow channel 60, the outlet of the first lubrication flow channel 60 is in communication with the second shaft cavity 210 of the outer spline shaft 20, the second shaft cavity 210 of the outer spline shaft 20 is in communication with the inlet of the second lubrication flow channel 70, and the outlet of the second lubrication flow channel 70 is in communication with the inlet of the third lubrication flow channel 80.

[0043] Among them, the inner spline shaft 10 and the outer spline shaft 20 are both hollow shafts, the inner spline of the inner spline shaft 10 is arranged on the inner surface, and the outer spline 280 of the outer spline shaft 20 is arranged on the outer surface, so the connection of the inner spline shaft 10 and the outer spline shaft 20 is to arrange the outer spline shaft 20 in the inner spline shaft 10, so that the outer spline of the outer spline shaft 20 matches the inner spline of the inner spline shaft 10.

[0044] Working principle: as Figure 2 shown, the lubricating oil enters from the first shaft cavity 110, sequentially flows through the first lubrication oil channel 60, the second shaft cavity 210, the second lubrication oil channel 70 and the third lubrication oil channel 80, and flows out through the third lubrication oil channel 80.

[0045] The lubrication route of the lubricating oil of the present application not only can ensure the lubrication of the spline, but also can take away the heat generated by the spline, and finally can recycle and reuse the lubricating oil.

[0046] Among them, the oil sealing ring 40 can block the lubricating oil flowing out after lubricating the spline, avoid the outflow of the lubricating oil, and also provide a sealing surface to enable it to be connected with the sealing seat 50 to realize sealing and fixing.

[0047] Preferably, the oil sealing ring 40 is welded with the oil guide ring 30. This connection mode is simple, and can achieve good sealing and oil blocking effect.

[0048] Further, as Figure 3As shown, one end of the inner spline shaft 10 is provided with an outer spline 280, and the other end is provided with a first oil inlet 120; the first oil inlet 120 is in communication with the first shaft cavity 110. Based on this, the lubricating oil enters the first shaft cavity 110 of the inner spline shaft 10 to achieve lubrication of the spline.

[0049] Further, as shown, a positioning shoulder 140 is arranged at one end of the outer surface of the inner spline shaft 10, and a thread 150 is arranged at the other end; the positioning shoulder and the thread 150 cooperate to achieve axial positioning of the oil sealing ring 40. Based on this, the axial positioning of the oil sealing ring 40 and the inner spline shaft 10 can be achieved; and the structure is simple, easy to manufacture and assemble. Figure 3

[0050] Further, as shown, Figure 1 Further, as shown, a positioning ring 100 is further included, which is sleeved on the outer surface of the inner spline shaft 10; one end of the positioning ring 100 abuts against the positioning shoulder, and the other end abuts against one end of the oil guide ring 30; the other end of the oil guide ring 30 abuts against a locking bolt 160, and the locking bolt 160 is connected with the thread 150. The axial positioning of the positioning ring 100 is achieved through the action of the positioning ring 100 and the locking nut, so as to ensure that the positioning ring 100 does not move on the inner spline shaft 10; not only the lubrication is ensured, but also the stability of the spline is improved.

[0051] Preferably, the positioning ring 100 is in interference fit with the inner spline shaft 10. This connection mode is simple and has good sealing effect.

[0052] Further, both ends of the second shaft cavity 210 are sealed. Based on this, the lubricating oil can enter the second shaft cavity 210 from the first lubricating flow channel 60, so as to flow along a certain route to achieve lubrication.

[0053] Further, as shown, Figure 1 Further, as shown, the second shaft cavity 210 is provided with an oil plug mounting shoulder 220 and an oil dam mounting shoulder 230; the oil plug mounting shoulder 220 is connected with an oil plug 240 as shown, Figure 5 Further, as shown, the oil dam mounting shoulder 230 is connected with an oil dam 250 as shown. Figure 6 This sealing structure is simple, easy to manufacture and assemble.

[0054] Further, as shown, Figure 4 ​As shown in the figure, the outer spline shaft 20 is provided with a second oil inlet 260 and a second oil outlet 270, and the second oil inlet 260 and the second oil outlet 270 are located between the oil plug 240 and the oil dam 250; the inner spline shaft 10 is provided with a first oil outlet 130 in communication with the second oil outlet 270; the second shaft cavity 210 is in communication with the first lubricating flow channel 60 through the second oil inlet 260, and the second shaft cavity 210 is in communication with the second lubricating flow channel 70 through the first oil outlet 130 and the second oil outlet 270. Through the route of the first lubricating flow channel 60 and the first shaft cavity 110 and the second shaft cavity 210, not only can the spline be effectively lubricated, but also the heat generated by the spline can be taken away; and through cooperation with the second lubricating flow channel 70 and the third lubricating flow channel 80, the lubricating oil can form a lubricating path, which not only improves the lubricating effect, but also has the effect of cooling, and can also recycle the lubricating oil.

[0055] Further, as shown in the figure, Figure 7 The oil guide ring 30 is provided with a third oil outlet 310, and the second lubricating flow channel 70 is in communication with the third lubricating flow channel 80 through the third oil outlet 310. Based on this, a lubricating path can be formed.

[0056] Further, as shown in the figure, Figure 8 The oil sealing ring 40 is arranged in the sealing seat 50, and the sealing seat 50 abuts against the oil guide ring 30; specifically, as shown in the figure, Figure 1 The inner surface of the sealing seat 50 abuts against the oil guide ring 30. Based on this, the sealing effect is improved.

[0057] Further, a sealing ring 510 is arranged between the oil sealing ring 40 and the sealing seat 50. Based on this, the sealing effect is improved.

[0058] The embodiment also provides a transmission system comprising the spline lubricating structure.

[0059] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A spline lubrication structure, characterized in that, It includes an internal spline shaft (10), an external spline shaft (20), an oil guide ring (30), an oil sealing ring (40), and a sealing seat (50); The outer spline shaft (20) is fitted with the inner spline shaft (10), and the outer spline (280) of the outer spline shaft (20) and the inner spline of the inner spline shaft (10) form a first lubrication channel (60); The inner spline shaft (10) is fitted with the oil guide ring (30), and a second lubrication channel (70) is provided between the outer surface of the inner spline shaft (10) and the inner surface of the oil guide ring (30); The oil guide ring (30) is fitted with the oil sealing ring (40), and a third lubrication channel (80) is provided between the outer surface of the oil guide ring (30) and the inner surface of the oil sealing ring (40); A sealing seat (50) is provided outside the sealing ring (40), and the sealing seat (50) is connected to the casing housing (90); The first shaft cavity (110) of the inner spline shaft (10) is connected to the inlet of the first lubrication channel (60), the outlet of the first lubrication channel (60) is connected to the second shaft cavity (210) of the outer spline shaft (20), the second shaft cavity (210) of the outer spline shaft (20) is connected to the inlet of the second lubrication channel (70), and the outlet of the second lubrication channel (70) is connected to the inlet of the third lubrication channel (80).

2. The spline lubrication structure as described in claim 1, characterized in that, One end of the internal spline shaft (10) is provided with an external spline (280), and the other end is provided with a first oil inlet (120); the first oil inlet (120) is connected to the first shaft cavity (110).

3. The spline lubrication structure as described in claim 1, characterized in that, A positioning shoulder (140) is provided at one end of the outer surface of the inner spline shaft (10), and a thread (150) is provided at the other end; the positioning shoulder and the thread (150) cooperate to realize the axial positioning of the oil sealing ring (40).

4. The spline lubrication structure as described in claim 3, characterized in that, It also includes a positioning ring (100), which is sleeved on the outside of the inner spline shaft (10); one end of the positioning ring (100) abuts against the positioning shoulder, and the other end abuts against one end of the oil guide ring (30); the other end of the oil guide ring (30) abuts against the locking bolt (160), and the locking bolt (160) is connected to the thread (150).

5. The spline lubrication structure as described in claim 1, characterized in that, The two ends of the second shaft cavity (210) are sealed.

6. The spline lubrication structure as described in claim 5, characterized in that, The second shaft cavity (210) is provided with an oil plug mounting shoulder (220) and an oil dam mounting shoulder (230). The oil plug mounting shoulder (220) is connected to an oil plug (240), and the oil dam mounting shoulder (230) is connected to an oil dam (250).

7. The spline lubrication structure as described in claim 6, characterized in that, The external spline shaft (20) is provided with a second oil inlet (260) and a second oil outlet (270), and the second oil inlet (260) and the second oil outlet (270) are both located between the oil plug (240) and the oil dam (250); The internal spline shaft (10) is provided with a first oil outlet (130) that communicates with the second oil outlet (270); The second shaft cavity (210) is connected to the first lubrication channel (60) through the second oil inlet (260), and the second shaft cavity (210) is connected to the second lubrication channel (70) through the first oil outlet (130) and the second oil outlet (270).

8. The spline lubrication structure as described in claim 1, characterized in that, The oil guide ring (30) is provided with a third oil outlet (310), and the second lubrication channel (70) is connected to the third lubrication channel (80) through the third oil outlet (310).

9. A spline lubrication structure as described in claim 1 or 8, characterized in that, A sealing ring (510) is provided between the sealing seat (50) and the sealing ring (40).

10. A transmission system, characterized in that, Includes the spline lubrication structure as described in any one of claims 1-9.

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