Planetary mechanism tooth surface lubricating system

Abstract

The utility model discloses a planetary mechanism tooth surface lubricating system which comprises a gear set comprising a gear ring, a plurality of planet gears meshed with inner teeth of the gear ring, and a sun gear meshed with outer teeth of the planet gears; the planet carrier is rotationally arranged in the gear ring and is coaxial with the sun gear, and the multiple planet gears are evenly distributed on the end face of the planet carrier and are rotationally arranged with the planet carrier; the curved-edge triangular frames are located between any two adjacent planet wheels and correspond to the planet carrier, and the curved-edge triangular frames are fixedly arranged on the planet carrier; wherein a first angle in the curved-edge tripod is provided with a first oil hole facing an area, to be meshed with the gear ring, of the planet wheel, and the center line of the first oil hole is tangent to a reference circle of the planet wheel to be meshed with the gear ring; a second oil hole facing the area where the sun gear and the planet gear are about to be meshed is formed in the second corner of the curved-edge triangular support, and the center line of the second oil hole passes through the pitch circle intersection point of the planet gear and the sun gear. The gear can effectively improve the tooth surface lubrication condition and prolong the fatigue life of the gear.

Description

Technical Field

[0001] The present application relates to the technical field of gear lubrication, and in particular to a planetary mechanism tooth surface lubrication system. Background Art

[0002] The operating conditions of wind turbine gearboxes are complex, the transmission torque is large, and a large amount of heat is generated during the meshing process of the gears. Therefore, the lubrication and cooling requirements of each gear in the gearbox are very high.

[0003] Good lubrication of the tooth surface is the most direct and critical factor affecting the fatigue life of the gear. As the cost competition of wind turbines becomes increasingly fierce, the torque density of the gearbox is getting higher and higher, and the safety margin of gear strength is very small. There are more and more failures such as fatigue pitting and bonding on the tooth surface. Improving the lubrication conditions of the tooth surface can reduce the current probability of gear failure and increase the fatigue service life.

[0004] Therefore, in view of the above technical problems, how to improve the lubrication conditions of the tooth surface is a technical problem that technical personnel in this field need to solve. Utility Model Content

[0005] The purpose of this application is to provide a planetary mechanism tooth surface lubrication system, which uses oil holes to align with the tooth surface pitch circle or pitch circle so that the tooth surface that is about to enter meshing can be lubricated in time, establish an oil film on the tooth surface, increase the fatigue life of the gear, and reduce the probability of failure.

[0006] To achieve the above objectives, the present application provides a planetary mechanism gear surface lubrication system, comprising:

[0007] The gear set comprises a gear ring fixed on a machine base, a plurality of planetary gears meshing with the inner teeth of the gear ring, and a sun gear coaxial with the gear ring and meshing with the outer teeth of the plurality of planetary gears;

[0008] A planet carrier, rotatably arranged in the gear ring and coaxial with the sun gear, a plurality of planetary gears are evenly distributed on the end surface of the planet carrier and rotatably arranged with the planet carrier;

[0009] A curved-edge tripod is located between any two adjacent planetary wheels and corresponds to an area of ​​the planetary frame, and the curved-edge tripod is fixedly arranged on the planetary frame;

[0010] Wherein, the first angle of the curved-edge tripod is provided with a first oil hole facing the area where the planetary gear and the gear ring are about to mesh, and the center line of the first oil hole is tangent to the pitch circle of the planetary gear about to mesh;

[0011] A second oil hole facing the area where the sun gear and the planet gear are about to mesh is provided at the second corner of the curved tripod, and a center line of the second oil hole passes through the intersection of the pitch circles of the planet gear and the sun gear.

[0012] Preferably, a plurality of the first oil holes are arranged in a row along the thickness direction of the curved-edge tripod, and a plurality of the second oil holes are arranged in a row along the thickness direction of the curved-edge tripod.

[0013] Preferably, two sides of the curved-edge tripod respectively correspond to the outer contours of two adjacent planetary wheels and are recessed inwards, and the last side of the curved-edge tripod corresponds to the outer contour of the planetary frame and protrudes outwards.

[0014] Preferably, the number of the curved-edge tripods is consistent with the number of the planetary gears.

[0015] Preferably, fan-shaped nozzles are provided on both the first oil hole and the second oil hole, and the oil injection fan-shaped areas of the fan-shaped nozzles on the first oil holes partially overlap, and the oil injection fan-shaped areas of the fan-shaped nozzles on the second oil holes partially overlap.

[0016] Preferably, the sun gear provides power to drive the planetary gears to rotate and revolve, and the planetary gears revolve to drive the planet carrier to rotate synchronously.

[0017] Preferably, the first oil hole and the second oil hole are externally connected to a lubricating oil spraying device.

[0018] Preferably, the curved tripod is spaced apart from the planetary gear and the sun gear.

[0019] Compared with the above-mentioned background technology, the present application makes the center line of the first oil hole tangent to the pitch circle of the planetary gear to be meshed, and the second oil hole passes through the intersection of the pitch circle of the planetary gear and the sun gear, and utilizes the characteristics of rotation and revolution of planetary gears to spray lubricating oil on the area where the planetary gear and the ring gear are about to mesh, and the area where the sun gear and the planetary gear are about to mesh, to ensure that the worst load-bearing area at the pitch circle or pitch line of the gear can be lubricated to ensure the lubrication effect; at the same time, the lubricating oil is sprayed on the tooth surface to be meshed, which quickly takes away the heat from the tooth surface and enables the tooth surface to establish an oil film in time, greatly improving the lubrication condition of the tooth surface and increasing the fatigue life of the gear.

[0020] Specifically, the present application includes a gear set, a planetary carrier and a curved-edge tripod. The gear set includes a ring gear fixed on a machine base, a plurality of planetary gears meshing with the inner teeth of the ring gear, and a sun gear coaxial with the ring gear and meshing with the outer teeth of a plurality of planetary gears at the same time; the planetary carrier is rotatably arranged in the ring gear and coaxial with the sun gear, and a plurality of planetary gears are evenly distributed on the end face of the planetary carrier and are rotatably connected with the planetary carrier; the curved-edge tripod is located between any two adjacent planetary gears and corresponds to the area of ​​the planetary carrier, and the curved-edge tripod is fixedly arranged on the planetary carrier and can rotate synchronously with the planetary carrier. The first oil hole is located at the first corner of the curved-edge tripod and faces the area where the planetary gear and the ring gear are about to mesh; the second oil hole is located at the second corner of the curved-edge tripod and faces the area where the sun gear and the planetary gear are about to mesh. Therefore, the lubrication system arranged in the above manner can effectively improve the lubrication of the tooth surface and increase the fatigue life of the gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0022] Figure 1 A schematic diagram of the structure of the planetary mechanism gear surface lubrication system provided in an embodiment of the present application;

[0023] Figure 2 This is a schematic diagram of the curved-edge tripod structure provided in an embodiment of the present application.

[0024] In the figure: 1, ring gear 2, planetary gear 3, sun gear 4, planetary carrier 5, curved tripod 6, first oil hole 7, second oil hole. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0026] It should be noted that in this embodiment, the directions or positional relationships indicated by "upper", "lower", "front", "back", etc. are based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present application. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0027] In order to enable those skilled in the art to better understand the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0028] like Figure 1 As shown, in this embodiment, a planetary mechanism tooth surface lubrication system is provided. The system is based on the existing planetary gears and utilizes the rotation and revolution characteristics of the planetary gear 2 to propose a lubrication system in which the oil hole is aligned with the pitch circle or pitch circle of the tooth surface. The system includes a gear set, a planet carrier 4 and a curved tripod. The gear set is a prior art, including a gear ring 1 fixed on a base, a plurality of planetary gears 2 meshing with the inner teeth of the gear ring 1, and a sun gear 3 coaxial with the gear ring 1 and meshing with the outer teeth of the plurality of planetary gears 2 at the same time.

[0029] The inner ring of the gear ring 1 is provided with internal teeth, and the outer teeth of the planetary gear 2 mesh with the inner teeth of the gear ring 1. Since the gear ring 1 is fixed, when the planetary gear 2 rotates, it will also revolve under the action of the gear ring 1. The planet carrier 4 is rotatably arranged in the gear ring 1 and is coaxial with the sun gear 3. Multiple planetary gears 2 are evenly distributed on the end surface of the planet carrier 4 and are rotatably arranged with the planet carrier 4.

[0030] The sun gear 3 provides power to drive the planetary gear 2 to rotate and revolve. The planetary gear 2 revolves to drive the planetary carrier 4 to rotate synchronously. Therefore, when the planetary gear 2 revolves, it can also drive the planetary carrier 4 to rotate around its own axis.

[0031] The curved tripod 5 is located between any two adjacent planetary wheels 2 and corresponds to the area of ​​the planetary frame 4, and the curved tripod 5 is fixed on the planetary frame 4; that is, when the planetary frame 4 rotates, it will naturally drive the curved tripod 5 to rotate around the axis of the planetary frame 4.

[0032] It should be noted that the curved tripod 5 has three corners, the first corner of which is provided with a first oil hole 6 facing the area where the planetary gear 2 and the ring gear 1 are about to mesh, and the center line of the first oil hole 6 is tangent to the pitch circle of the planetary gear 2 to be meshed.

[0033] The second corner of the curved tripod 5 is provided with a second oil hole 7 facing the area where the sun gear 3 and the planetary gear 2 are about to mesh, and the center line of the second oil hole 7 passes through the intersection of the pitch circles of the planetary gear 2 and the sun gear 3.

[0034] Specifically, please refer to Figure 1 When the sun gear 3 is powered and rotates clockwise, the two adjacent planetary gears 2 will rotate counterclockwise under the drive of the sun gear 3, and at the same time drive the planetary carrier 4 to rotate clockwise. Based on the meshing principle of planetary gears, the center line of the first oil hole 6 is tangent to the pitch circle of the planetary gear 2 to be meshed. The gear pitch circle or pitch line is the worst load-bearing area, thereby achieving a better lubrication effect.

[0035] According to the characteristics of the planetary gear 2 rotating counterclockwise and revolving clockwise, this oil injection method will bring the lubricating oil into the area where the planetary gear 2 and the ring gear 1 are about to mesh when the planetary gear 2 rotates, quickly take away the heat from the tooth surface, and establish an oil film on the tooth surface in time, greatly improving the lubrication of the tooth surface and increasing the fatigue life of the gear.

[0036] Similarly, the sun gear 3 rotates clockwise and the planetary gear 2 rotates counterclockwise, so that the center line of the second oil hole 7 passes through the intersection of the pitch circles of the planetary gear 2 and the sun gear 3. According to the characteristics that the planetary gear 2 rotates counterclockwise and the sun gear 3 rotates clockwise, this oil injection method will quickly take away the heat from the tooth surface of the planetary gear 2 and the sun gear 3 that are about to mesh, so that the oil film is established on the tooth surface in time, which greatly improves the lubrication of the tooth surface and increases the fatigue life of the gear.

[0037] Based on the above embodiments, the present application makes the center line of the first oil hole 6 tangent to the pitch circle of the planetary gear 2 to be meshed, and the second oil hole 7 passes through the intersection of the pitch circle of the planetary gear 2 and the sun gear 3. The first oil hole 6 and the second oil hole 7 are externally connected to a lubricating oil spraying device, and utilizes the characteristics of rotation and revolution of planetary gears to spray lubricating oil on the meshing area between the planetary gear 2 and the ring gear 1, and the meshing area between the sun gear 3 and the planetary gear 2, to ensure that the worst load-bearing area at the pitch circle or pitch line of the gear can be lubricated to ensure the lubrication effect; at the same time, the lubricating oil is sprayed on the tooth surface to be meshed, quickly taking away the heat of the tooth surface, so that the oil film is established on the tooth surface in time, which greatly improves the lubrication condition of the tooth surface and increases the fatigue life of the gear.

[0038] Please refer to Figure 2 The curved tripod 5 has a certain thickness, and a plurality of first oil holes 6 are arranged in a row along the thickness direction of the curved tripod 5. Similarly, a plurality of second oil holes 7 are also arranged in a row along the thickness direction of the curved tripod 5, thereby ensuring that lubricating oil can be sprayed in the width direction of the planetary gear 2 and the sun gear 3 to improve the lubrication effect.

[0039] In addition, fan-shaped nozzles are provided on the first oil hole 6 and the second oil hole 7, and the oil injection fan-shaped areas of the fan-shaped nozzles on the multiple first oil holes 6 partially overlap, and the oil injection fan-shaped areas of the fan-shaped nozzles on the multiple second oil holes 7 partially overlap, so as to ensure that the entire tooth surface of the ring gear 1, the sun gear 3 and the planetary gear 2 can be timely and fully lubricated.

[0040] Please refer to Figure 1 The two sides of the curved-edge tripod 5 correspond to the outer contours of the two adjacent planetary gears 2 and are concave inwards, and the last side of the curved-edge tripod 5 corresponds to the outer contour of the planetary frame 4 and is convex outwards. The curved-edge tripod 5 is spaced from the planetary gears 2 and the sun gear 3 to avoid affecting the rotation of the gear set.

[0041] Based on the above embodiment, since a curved-edge tripod 5 is provided between any two adjacent planetary gears 2, the number of the curved-edge tripods 5 should be consistent with the number of the planetary gears 2, so as to ensure that each planetary gear 2 can obtain sufficient lubrication effect.

[0042] It should be noted that, in this specification, relational terms such as first and second are merely used to distinguish one entity from other entities, but do not necessarily require or imply any actual relationship or order between these entities.

[0043] Specific examples are used herein to illustrate the principles and implementation methods of the present application, and the description of the above embodiments is only used to help understand the method and core ideas of the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principles of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the claims of the present application.

Claims

1. A planetary mechanism gear surface lubrication system, characterized in that: include: The gear set comprises a gear ring fixed on a machine base, a plurality of planetary gears meshing with the inner teeth of the gear ring, and a sun gear coaxial with the gear ring and meshing with the outer teeth of the plurality of planetary gears; A planet carrier, rotatably arranged in the gear ring and coaxial with the sun gear, a plurality of planetary gears are evenly distributed on the end surface of the planet carrier and rotatably arranged with the planet carrier; A curved-edge tripod is located between any two adjacent planetary wheels and corresponds to an area of ​​the planetary frame, and the curved-edge tripod is fixedly arranged on the planetary frame; Wherein, the first angle of the curved-edge tripod is provided with a first oil hole facing the area where the planetary gear and the gear ring are about to mesh, and the center line of the first oil hole is tangent to the pitch circle of the planetary gear about to mesh; A second oil hole facing the area where the sun gear and the planet gear are about to mesh is provided at the second corner of the curved tripod, and a center line of the second oil hole passes through the intersection of the pitch circles of the planet gear and the sun gear.

2. The planetary mechanism gear surface lubrication system according to claim 1, characterized in that: The plurality of first oil holes are arranged in a row along the thickness direction of the curved-edge tripod, and the plurality of second oil holes are arranged in a row along the thickness direction of the curved-edge tripod.

3. The planetary mechanism gear surface lubrication system according to claim 2, characterized in that: Two sides of the curved-edge tripod respectively correspond to the outer contours of two adjacent planetary wheels and are recessed inwards, and the last side of the curved-edge tripod corresponds to the outer contour of the planetary frame and is protruding outwards.

4. The planetary mechanism gear surface lubrication system according to claim 2, characterized in that: The number of the curved-edge tripods is consistent with the number of the planetary gears.

5. The planetary mechanism gear surface lubrication system according to claim 2, characterized in that: The first oil hole and the second oil hole are both provided with fan-shaped nozzles, and the oil injection fan-shaped areas of the fan-shaped nozzles on the first oil holes partially overlap, and the oil injection fan-shaped areas of the fan-shaped nozzles on the second oil holes partially overlap.

6. The planetary mechanism gear surface lubrication system according to claim 2, characterized in that: The sun gear provides power to drive the planetary gears to rotate and revolve, and the planetary gears revolve to drive the planet carrier to rotate synchronously.

7. The planetary mechanism gear surface lubrication system according to claim 2, characterized in that: The first oil hole and the second oil hole are externally connected to a lubricating oil spraying device.

8. The planetary mechanism gear surface lubrication system according to claim 2, characterized in that: The curved-edge tripod is spaced apart from the planetary gear and the sun gear.

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