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

Abstract

The invention relates to the technical field of wind power transmission, in particular to a high-stability module based on a compound planet gear 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, internal gear oil is driven to be driven outwards by adopting a centrifugal phenomenon generated in the gear rotating process, so that internal heat can be rapidly 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] The invention relates to the technical field of wind power transmission, and in particular to a high-stability module based on a composite planetary gear in a wind power gear box. Background Art

[0002] With the growing global demand for renewable energy, wind power generation has been widely used as a green and environmentally friendly way to obtain energy. As an important component of wind turbine generator sets, the performance of wind turbine gearboxes directly affects the efficiency of the entire wind power generation system. In order to meet market demand, wind turbine gearboxes are constantly pursuing higher efficiency, longer life and lighter weight. As an advanced transmission method, compound planetary gear trains have been widely used in wind turbine gearboxes due to their unique design concepts and advantages, such as increasing speed ratios and reducing weight. However, due to its compact structure, compound planetary gear trains will cause a sharp increase in internal heat during long-term high-load operation, and the highly integrated gear set design greatly increases the problem of heat concentration, resulting in serious internal heat accumulation, which seriously affects its service life. Summary of the invention

[0003] The technical problem to be solved by the present invention is that the traditional compound planetary gear system will cause a sharp increase in internal heat during long-term high-load operation due to its compact structure, and the highly integrated gear set design greatly increases the problem of heat concentration, resulting in serious internal heat accumulation, which seriously affects its service life.

[0004] The technical solution adopted by the present invention to solve its technical problems is: a high-stability module based on a composite planetary gear in a wind power gearbox, comprising 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, a first planetary gear with an integral structure is axially fixed on the outer side of the first planetary pin, the first planetary pin is meshed with the 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 shaft is meshed with the second sun gear on the outer side of the output shaft through the third planetary gear, an inner gear ring meshed with the first planetary gear and the third planetary gear respectively is fixed on the inner wall of the combined planetary carrier, a lateral flow guide heat exchange cover is fixedly assembled on the inner arc surface of the combined planetary carrier, the left end of the lateral flow guide heat exchange cover has a first bending cover and a second bending cover of an integral structure bent inwardly, the left end of the planetary pin is inserted into the first bending cover and movably assembled with the first bending cover, and a guide hole matching the input shaft is opened inside the second bending cover.

[0005] A built-in guide groove is provided on the arc surface outside the spline.

[0006] The built-in guide groove is provided with internal guide blades.

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

[0008] The external guide groove is provided with an external guide vane at a position corresponding to the external lateral opening.

[0009] A first guide channel for connecting the first bending cover and the external guide groove is provided inside the second planetary shaft.

[0010] An arc-shaped air guide cover is arranged inside the combined planet carrier and outside the third planetary gear and the spline.

[0011] The inside of the lateral flow-guiding heat exchange cover is fixedly equipped with an electric-controlled regulating valve at the connecting end of the first bending cover and the second bending cover.

[0012] An embedded temperature control sensor controller for controlling the electric control regulating valve is fixedly mounted on the inner side of the arc-shaped air deflector.

[0013] The beneficial effects of the present invention are: (1) The high stability module based on the composite planetary gear in the wind turbine gearbox of the present invention drives the internal gear oil outward by using the centrifugal phenomenon generated during the rotation of the gear, so that the internal heat can be quickly conducted outward, thereby greatly avoiding internal heat accumulation and improving the heat dissipation effect of the entire planetary gear set; (2) By adopting the design of opening the guide groove inside, it does not occupy the external space, greatly improving the utilization rate of the internal space; (3) A lateral flow guide heat exchange cover connected to the annular guide groove is fixedly mounted on the inner arc surface of the combined planet carrier. The lateral flow guide heat exchange cover can quickly transfer heat to the outside of the combined planet carrier, thereby improving the heat dissipation effect on the outside. (4) A first bending cover and a second bending cover having an inwardly bent integral structure are provided at the left end of the lateral flow guide heat exchange cover, which can control the reflux direction of the heat exchange oil and improve the circulation guidance; (5) The hollow planetary pin design not only reduces the mass of the entire transmission mechanism, but also facilitates the circulation of heat exchange oil; (6) Automatically control the flow direction and flow rate by changing the temperature at different internal locations, making temperature control more efficient; (7) The staggered first bending cover and the second bending cover can not only facilitate the internal layout and make rational use of the internal space, but also increase the heat dissipation area. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0015] Figure 1 It is a structural schematic diagram of the present invention.

[0016] Figure 2 It is a schematic diagram of the internal flow guiding mechanism of the present invention.

[0017] Figure 3 It is a side schematic diagram in the present invention. DETAILED DESCRIPTION

[0018] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the present invention in a schematic manner, and therefore only show the components related to the present invention.

[0019] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0020] Figure 1 , Figure 2 and Figure 3 A high stability module based on a composite planetary gear in a wind power gearbox is shown, comprising a combined planetary carrier 1, wherein an input shaft 2, an output shaft 3, a first planetary pin 21 and a second planetary pin 31 are installed inside the combined planetary carrier 1, a first planetary gear 22 of an integral structure is axially fixed to the outer side of the first planetary pin 21, the first planetary pin 21 is meshed with a first sun gear 4 on the outer side of the input shaft 2 through 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, and the second planetary shaft 31 is meshed with the third planetary gear 4 through the third planetary gear 4. 33 is meshed with the second sun gear 5 on the outer side of the output shaft 3 for transmission, an inner gear ring 6 is fixed on the inner wall of the combined planetary carrier 1, which is meshed with the first planetary gear 4 and the third planetary gear 33 respectively, a lateral flow guide heat exchange cover 7 is fixedly assembled on the inner arc surface of the combined planetary carrier 1, and the left end of the lateral flow guide heat exchange cover 7 has a first bending cover 8 and a second bending cover 9 of an integral structure bent inwardly, 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 a guide hole 10 matching the output shaft 21 is opened inside the second bending cover 9.

[0021] Working principle: External power drives the input shaft 2 to rotate, and the input shaft 2 will drive the first planetary gear 22 to rotate through the first sun gear 4, and then the first planetary gear 22 drives the combined planetary carrier 1 to rotate through the inner gear ring 6, and then the combined planetary carrier 1 drives the third planetary gear 33 through the inner gear ring 6 on the other side, and then the third planetary gear 33 drives the second planetary gear 32 through the second planetary pin 31, and then the second planetary gear 32 drives the second sun gear 5 to rotate, and the second sun gear 5 drives the output shaft 21 to rotate. In the whole process The inner side of the third planetary gear 33 will drive the internal spline 5 to rotate. At this time, the oil inside the gear box will be drawn into the spline 5, and then introduced into the third planetary gear 33 through the spline 5, and then introduced into the lateral flow guide heat exchange cover 7 by the third planetary gear 33, and then the lateral flow guide heat exchange cover 7 will automatically guide the heat exchanged oil into the first bending cover 8 or the second bending cover 9 according to the temperature control, and then the first bending cover 8 will guide the oil back to the second planetary pin 31, and then the second bending cover 9 will guide it back to the outside of the output shaft 21.

[0022] In order to facilitate lateral flow guidance, a built-in flow guide groove 11 is provided on the outer arc surface of the spline 5 .

[0023] In order to facilitate flow guidance, the internal guide groove 11 has internal guide blades 12 therein.

[0024] When the spline 5 rotates, the internal guide vane 12 will guide the internal oil into the planetary gear 4, so that negative pressure is generated inside, which will cause the oil on the left side to flow into the built-in guide groove 11, thereby forming a flow direction from left to outside.

[0025] In order to cooperate with the internal flow diversion, an external flow diversion groove 13 is opened on the outer arc surface of the third planetary gear 33 , and an external lateral opening connected to the external flow diversion groove 13 is opened on the left side surface of the third planetary gear 33 .

[0026] In order to cooperate with the internal flow guidance, the external flow guide groove 13 has an external flow guide blade 14 at a position corresponding to the external lateral opening.

[0027] When the third planetary gear 33 rotates at a high speed, it will drive the external guide blades 14 to rotate, and then the external guide blades 14 will draw the oil into the external guide groove 13 from the external lateral opening, and then the external guide groove 13 will guide the internal oil into the lateral guide heat exchange cover 7, and then the lateral guide heat exchange cover 7 will transport it along the inner wall of the combined planetary carrier 1, and heat will be exchanged during the transportation process, and then it will be guided back to the inside by the first bending cover 8 and the second bending cover 9, completing a cycle of heat exchange process.

[0028] In order to cooperate with the circulation flow, a first guide channel 16 for connecting the first bending cover 8 and the external guide groove 13 is opened inside the second planetary pin 31.

[0029] The oil in 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 .

[0030] In order to improve the guiding property of the heat exchange fluid, an arc-shaped flow guide cover 17 is arranged inside the combined planetary carrier 1 on the outer side of the third planetary gear 33 and the spline 5 .

[0031] The arc-shaped air guide cover 17 is designed to prevent the third planetary gear 33 and the spline 5 from throwing oil to the front and rear sides when rotating, and to ensure that the centrifugal phenomenon generated by the third planetary gear 33 and the spline 5 when rotating can guide the oil from the inside to the outside into the lateral flow guide heat exchange cover 7.

[0032] In order to cooperate with the internal control, the inside of the lateral flow guide heat exchange cover 7 is fixedly equipped with an electrically controlled regulating valve 18 at the connection end of the first bending cover 8 and the second bending cover 9.

[0033] The electrically controlled regulating valve 18 is a prior art, which controls the open state of the lateral flow guide heat exchange cover 7 and the first curved cover 8 or the lateral flow guide heat exchange cover 7 and the second curved cover 9 by starting; and closes the closed state of the lateral flow guide heat exchange cover 7 and the first curved cover 8 or the lateral flow guide heat exchange cover 7 and the second curved cover 9 by closing.

[0034] In order to accurately control the internal temperature, an embedded temperature control sensor controller 19 for controlling the electric control valve 18 is fixedly mounted on the inner side of the arc-shaped air deflector 17 .

[0035] Through the design of the embedded temperature control sensor controller 19, the temperature of the third planetary gear 33 and the spline 5 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, and then open the connection between the lateral flow guide heat exchange cover 7 and the first bending cover 8 or the lateral flow guide heat exchange cover 7 and the second bending cover 9 through the start of the electronically controlled regulating valve 18.

[0036] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

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

2. The high stability module based on the composite planetary gear in the wind power gearbox according to claim 1 is characterized in that: A built-in guide groove (11) is provided on the outer arc surface of the spline (5).

3. The high stability module based on the composite planetary gear in the wind power gearbox according to claim 2 is characterized in that: The built-in guide groove (11) has an internal guide blade (12) inside.

4. The high stability module based on the composite planetary gear in the wind power gearbox according to claim 1 is characterized by: An external 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 guide groove (13) is provided on the left side surface of the third planetary gear (33).

5. The high stability module based on the composite planetary gear in the wind power gearbox according to claim 4 is characterized in that: The external guide groove (13) has an external guide blade (14) at a position corresponding to the external lateral opening.

6. The high stability module based on the composite planetary gear in the wind power gearbox according to claim 1 is characterized by: A first flow guide channel (16) for connecting the first bending cover (8) and the external flow guide groove (13) is provided inside the second planetary shaft (31).

7. The high stability module based on the composite planetary gear in the wind power gearbox according to claim 1 is characterized by: An arc-shaped air guide cover (17) is arranged inside the combined planet carrier (1) and outside the third planet gear (33) and the spline (5).

8. The high stability module based on the composite planetary gear in the wind power gearbox according to claim 7 is characterized by: An electrically controlled regulating valve (18) is fixedly mounted inside the lateral flow-guiding heat exchange cover (7) at the connection end between the first bending cover (8) and the second bending cover (9).

9. The high stability module based on the composite planetary gear in the wind power gearbox according to claim 8, characterized in that: An embedded temperature control sensor controller (19) for controlling an electrically controlled regulating valve (18) is fixedly mounted on the inner side surface of the arc-shaped flow deflector (17).

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