High-stability module based on compound planet gear in wind power gear box

Abstract

The utility model relates to the technical field of wind power transmission, in particular to a high-stability module based on a compound planet wheel in a wind power gear box, which comprises a combined planet carrier, and an input shaft, an output shaft, a first planet pin and a second planet pin are mounted in the combined planet carrier. According to the high-stability module based on the compound planet gear in the wind power gear box, gear oil in the high-stability module is driven to drive outwards by adopting a centrifugal phenomenon generated in the gear rotating process, so that internal heat can be quickly conducted outwards, internal heat accumulation is greatly avoided, and the heat dissipation effect of a whole planet gear set is improved; by adopting the design that the diversion trenches are formed inside, the external space is not occupied, and the utilization rate of the internal space is greatly improved; the lateral flow guide heat exchange cover communicated with the annular flow guide groove is fixedly assembled on the arc-shaped surface of the inner side of the combined planet carrier, heat can be quickly conducted to the outer side of the combined planet carrier through the lateral flow guide heat exchange cover, and the outer side heat dissipation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of wind power transmission technology, and in particular to a high-stability module based on a composite planetary gear in a wind turbine gearbox. Background Technology

[0002] With the continuous growth of global demand for renewable energy, wind power, as a green and environmentally friendly energy source, has been widely adopted. As a crucial component of wind turbine generators, the performance of the wind turbine gearbox directly impacts the efficiency of the entire wind power system. To meet market demands, wind turbine gearboxes are constantly striving for higher efficiency, longer lifespan, and lighter weight. Composite planetary gear systems, as an advanced transmission method, have been widely used in wind turbine gearboxes due to their unique design concepts and advantages, such as increased speed ratio and reduced weight. However, due to their compact structure, composite planetary gear systems experience a significant increase in internal heat generation during prolonged high-load operation. The highly integrated gear design further exacerbates the problem of heat concentration, leading to severe internal heat buildup and significantly impacting their service life. Utility Model Content

[0003] The technical problem to be solved by this utility model is that traditional composite planetary gear trains, due to their compact structure, will cause a surge in internal heat generation during long-term high-load operation. The highly integrated gear set design greatly increases the problem of concentrated heat generation, resulting in serious internal heat accumulation and severely affecting its service life.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a high-stability module based on a composite planetary gear in a wind turbine gearbox, including a combined planetary carrier. An input shaft, an output shaft, a first planetary pin, and a second planetary pin are installed inside the combined planetary carrier. An integral first planetary gear is axially fixed on the outer side of the first planetary pin. The first planetary pin meshes with a first sun gear on the outer side of the input shaft through the first planetary gear. A second planetary gear and a third planetary gear are axially fixed on the outer side of the second planetary pin. The second planetary pin meshes with a second sun gear on the outer side of the output shaft through the third planetary gear. An internal gear ring is fixed on the inner wall of the combined planetary carrier, which meshes with the first planetary gear and the third planetary gear respectively. A lateral flow-guiding heat exchange shroud is fixedly mounted on the inner arc-shaped surface of the combined planetary carrier. The left end of the lateral flow-guiding heat exchange shroud has an integrally bent first folding shroud and a second folding shroud with an inwardly bent structure. The left end of the second planetary pin is inserted into the first folding shroud and movably assembled with the first folding shroud. A flow-guiding hole that cooperates with the input shaft is opened inside the second folding shroud.

[0005] An internal guide groove is provided on the outer arc-shaped surface of the spline.

[0006] The built-in guide groove has internal guide vanes.

[0007] An external guide groove is provided on the outer arc-shaped surface of the third planetary gear, and an external lateral opening connected to the external guide groove is provided on the left side surface of the third planetary gear.

[0008] The external guide groove has external guide vanes corresponding to the external lateral opening position inside.

[0009] The second planetary pin has a first flow channel inside for connecting the first bending cover and the external flow channel.

[0010] An arc-shaped fairing is provided inside the combined planetary carrier, outside the third planetary gear and spline.

[0011] The lateral flow heat exchange hood is equipped with electrically controlled regulating valves at the connection ends of the first and second bend hoods.

[0012] An embedded temperature control sensor controller for controlling the electronically controlled regulating valve is fixedly mounted on the inner side of the arc-shaped flow guide.

[0013] The beneficial effects of this utility model are:

[0014] (1) The high stability module based on the composite planetary gear in the wind power gearbox of this utility model uses the centrifugal phenomenon generated during the rotation of the gear to drive the internal gear oil to the outside, thereby quickly transferring the internal heat to the outside, thus greatly avoiding internal heat accumulation and improving the heat dissipation effect of the entire planetary gear set.

[0015] (2) By adopting the design of internally opened guide channels, it does not occupy external space and greatly improves the utilization rate of its internal space;

[0016] (3) A lateral flow guide heat exchange hood connected to the annular flow guide groove is fixedly installed on the inner arc surface of the combined planetary carrier. The heat can be quickly transferred to the outside of the combined planetary carrier through the lateral flow guide heat exchange hood, thereby improving the heat dissipation effect on the outside.

[0017] (4) The first and second bend covers with an integrated structure that bends inward at the left end of the lateral flow heat exchange cover can control the return flow of heat exchange oil and improve circulation guidance.

[0018] (5) The use of a hollow planetary pin design can not only reduce the weight of the entire transmission mechanism, but also facilitate the circulation of heat exchange oil.

[0019] (6) The flow direction and flow rate are automatically controlled by the temperature changes at different internal locations, making temperature control more efficient;

[0020] (7) The staggered arrangement of the first and second bend covers not only facilitates the internal layout and makes reasonable use of the internal space, but also increases the heat dissipation area. Attached Figure Description

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Figure 1 This is a schematic diagram of the structure of this utility model.

[0023] Figure 2 This is a schematic diagram of the internal flow guiding mechanism of this utility model.

[0024] Figure 3 This is a side view of the present invention. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] Figure 1 , Figure 2 and Figure 3The diagram illustrates a high-stability module based on a composite planetary gear in a wind turbine gearbox, comprising a combined planetary carrier 1. The combined planetary carrier 1 houses an input shaft 2, an output shaft 3, a first planetary pin 21, and a second planetary pin 31. An integrally formed first planetary gear 22 is axially fixed to the outer side of the first planetary pin 21. The first planetary pin 21 engages with a first sun gear 4 on the outer side of the input shaft 2 via the first planetary gear 22. A second planetary gear 32 and a third planetary gear 33 are axially fixed to the outer side of the second planetary pin 31. The second planetary pin 31 is connected to the third planetary gear 32 via the third planetary gear 33. The second sun gear 5 on the outer side of the output shaft 3 meshes with the output shaft 3. The inner wall of the combined planetary carrier 1 is fixed with an internal gear ring 6 that meshes with the first planet gear 22 and the third planet gear 33 respectively. A lateral flow guide heat exchange shroud 7 is fixedly mounted on the inner arc surface of the combined planetary carrier 1. The left end of the lateral flow guide heat exchange shroud 7 has an integral structure of a first bending shroud 8 and a second bending shroud 9 that bends inward. The left end of the second planetary pin 31 is inserted into the first bending shroud 8 and is movably assembled with the first bending shroud 8. A guide hole 10 that cooperates with the output shaft 21 is opened inside the second bending shroud 9.

[0028] Working principle: External power drives the input shaft 2 to rotate, which in turn drives the first planetary gear 22 to rotate via the first sun gear 4. The first planetary gear 22 then drives the combined planetary carrier 1 to rotate via the internal gear ring 6. The combined planetary carrier 1 then drives the third planetary gear 33 via the internal gear ring 6 on the other side. The third planetary gear 33 then drives the second planetary gear 32 via the second planetary pin 31. The second planetary gear 32 then drives the second sun gear 5 to rotate, which in turn drives the output shaft 21 to rotate. During this process, the inner side of the third planetary gear 33 drives the internal spline to rotate. At this time, the oil inside the gearbox is drawn into the spline and then guided to the third planetary gear 33 through the spline. The third planetary gear 33 then guides the oil to the side flow heat exchange shroud 7. The side flow heat exchange shroud 7 then automatically guides the oil after heat exchange to the first bending shroud 8 or the second bending shroud 9 according to the temperature control. The first bending shroud 8 then guides the oil back to the second planetary pin 31, and the second bending shroud 9 guides the oil back to the outside of the output shaft 21.

[0029] To facilitate lateral airflow, an internal airflow guide groove 11 is provided on the outer arc-shaped surface of the spline.

[0030] To facilitate airflow, the built-in guide channel 11 has internal guide vanes 12.

[0031] When the spline rotates, the internal guide vane 12 will guide the internal oil into the planetary gear 4, creating a negative pressure inside. This will cause the oil on the left side to flow into the built-in guide groove 11, thus forming a flow direction from left to out.

[0032] In order to facilitate internal flow guidance, an external flow guide groove 13 is provided on the outer arc surface of the third planetary gear 33, and an external lateral opening connected to the external flow guide groove 13 is provided on the left side surface of the third planetary gear 33.

[0033] In order to facilitate internal flow guidance, the external flow guide groove 13 has an external flow guide blade 14 corresponding to the external lateral opening position.

[0034] When the third planetary gear 33 rotates at high speed, it will drive the external guide vane 14 to rotate. Then, the external guide vane 14 draws the oil into the external guide groove 13 from the external side opening. The external guide groove 13 then guides the oil into the side guide heat exchange shroud 7. The side guide heat exchange shroud 7 then transports the oil along the inner wall of the combined planetary carrier 1. Heat exchange occurs during the transport process. The oil is then guided back to the inside by the first bending shroud 8 and the second bending shroud 9, completing one cycle of heat exchange.

[0035] To facilitate the circulating flow, the second planetary pin 31 has a first flow channel 16 inside for connecting the first bending cover 8 and the external flow channel 13.

[0036] The oil inside the first bending cover 8 is introduced into the external guide groove 13 through the first guide channel 16, thereby forming a circulating flow channel with the lateral guide heat exchange cover 7.

[0037] To improve the guiding properties of the heat exchange fluid, an arc-shaped guide shroud 17 is provided inside the combined planetary carrier 1, located on the outside of the third planetary gear 33 and the spline.

[0038] The arc-shaped guide shroud 17 design can prevent the oil from being thrown forward and backward on both sides when the third planetary gear 33 and spline rotate. It can ensure that the centrifugal phenomenon generated by the third planetary gear 33 and spline when rotating can guide the oil from the inside to the outside into the side guide heat exchange shroud 7.

[0039] To facilitate internal control, electrically controlled regulating valves 18 are fixedly installed inside the lateral flow heat exchange shroud 7 at the connection ends of the first bend shroud 8 and the second bend shroud 9.

[0040] The electrically controlled regulating valve 18 is existing technology. It controls the opening state of the lateral flow heat exchange shroud 7 and the first bend shroud 8 or the lateral flow heat exchange shroud 7 and the second bend shroud 9 by starting it; and closes the lateral flow heat exchange shroud 7 and the first bend shroud 8 or the lateral flow heat exchange shroud 7 and the second bend shroud 9 by closing it.

[0041] To facilitate precise control of the internal temperature, an embedded temperature control sensor controller 19 for controlling the electronically controlled regulating valve 18 is fixedly mounted on the inner side of the arc-shaped flow guide shroud 17.

[0042] By designing an embedded temperature control sensor controller 19, the temperature of the third planetary gear 33 and the spline position can be monitored. Once the temperature at this position exceeds the set maximum temperature, the embedded temperature control sensor controller 19 will control the corresponding electronically controlled regulating valve 18 to start. Then, the electronically controlled regulating valve 18 will start to open the connection between the lateral flow heat exchange cover 7 and the first bending cover 8 or the lateral flow heat exchange cover 7 and the second bending cover 9.

[0043] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A high stability module based on composite planetary gears in a wind turbine gearbox, comprising a combined planet carrier (1), characterized in that: The combined planetary carrier (1) is internally provided with an input shaft (2), an output shaft (3), a first planetary pin (21) and a second planetary pin (31), the outer side of the first planetary pin (21) is axially fixed with an integrated first planetary gear (22), the first planetary pin (21) is in meshing transmission with the first sun gear (4) outside the input shaft (2) through the first planetary gear (22), the outer side of the second planetary pin (31) is axially fixed with a second planetary gear (32) and a third planetary gear (33), the second planetary pin (31) is in meshing transmission with the second sun gear (5) outside the output shaft (3) through the third planetary gear (33), the inner wall of the combined planetary carrier (1) is fixed with an inner gear ring (6) in meshing transmission with the first planetary gear (22) and the third planetary gear (33) respectively, the inner side of the combined planetary carrier (1) is fixedly assembled with a lateral flow guide heat exchange cover (7), the left end of the lateral flow guide heat exchange cover (7) is provided with an integrated first bending cover (8) and a second bending cover (9) which are inwardly bent, the left end of the second planetary pin (31) is inserted into the first bending cover (8) and movably assembled with the first bending cover (8), and the second bending cover (9) is internally provided with a flow guide through hole (10) matched with the input shaft (2).

2. The high stability module based on the composite planetary gear in the wind turbine gearbox according to claim 1, characterized in that: The third planetary gear (33) is internally provided with a spline, and the spline is externally provided with an arc-shaped surface on which an internal flow guide groove (11) is formed.

3. The high stability module based on the composite planetary gear in the wind turbine gearbox according to claim 2, characterized in that: The internal flow guide groove (11) is internally provided with an internal flow guide vane (12).

4. The high stability module based on the composite planetary gear in the wind turbine gearbox according to claim 1, characterized in that: The third planetary gear (33) is externally provided with an arc-shaped surface on which an external flow guide groove (13) is formed, and the left side surface of the third planetary gear (33) is provided with an external lateral opening which is in communication with the external flow guide groove (13).

5. The high stability module based on the composite planetary gear in the wind turbine gearbox according to claim 4, characterized in that: The external flow guide groove (13) is internally provided with an external flow guide vane (14) corresponding to the position of the external lateral opening.

6. The high stability module based on the composite planetary gear in the wind turbine gearbox according to claim 1, characterized in that: The second planetary pin (31) is internally provided with a first flow guide channel (16) for connecting the first bending cover (8) and the external flow guide groove (13).

7. The high stability module based on the composite planetary gear in the wind turbine gearbox according to claim 1, characterized in that: The combined planetary carrier (1) is internally provided with an arc-shaped flow guide cover (17) located outside the spline.

8. The high stability module based on the composite planetary gear in the wind turbine gearbox according to claim 7, characterized in that: The internal side of the arc-shaped flow guide cover (17) is fixedly assembled with an embedded temperature control sensing controller (19) for controlling the electric control adjusting valve (18).

9. The high stability module based on the composite planetary gear in the wind turbine gearbox according to claim 8, characterized in that: The internal side of the arc-shaped flow guide cover (17) is fixedly assembled with an embedded temperature control sensing controller (19) for controlling the electric control adjusting valve (18).

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