Planet carrier, gear box and wind generating set

Abstract

The invention relates to a planet carrier, a gearbox and a wind generating set, the planet carrier comprises a first carrier body and a second carrier body, the first carrier body comprises a transmission shaft and a connecting body, spline teeth are arranged on the periphery of the side, away from the connecting body, of the transmission shaft, and the multiple spline teeth are distributed in the circumferential direction of the transmission shaft; the second frame body is arranged on the side, away from the transmission shaft, of the connecting body in the axial direction of the transmission shaft, and the second frame body is configured to be connected with the transmission wheel; the connecting assembly is arranged on the first frame body and the second frame body, and the first frame body and the second frame body are detachably connected through the connecting assembly. According to the planet carrier, the gearbox and the wind generating set provided by the embodiment of the invention, the planet carrier can meet the strength requirement of the planet carrier, the cost is low, and the service life is long.

Description

Technical Field

[0001] The present application relates to the field of transmission technology, and in particular to a planetary carrier, a gear box and a wind turbine generator set. Background Art

[0002] A wind turbine is a device that converts wind energy into electrical energy. As a sustainable and renewable green energy source, wind turbines are constantly developing towards larger sizes. The gearbox is the core component of a wind turbine, and its performance directly affects the overall cost of the wind turbine, the reliability of the unit's operation, and its market competitiveness.

[0003] As the capacity of wind turbines increases, the size of the planetary carrier of the gearbox also tends to be larger. The planetary carrier of the gearbox usually needs to be matched with other components in transmission, such as being connected to the upper planetary system in the transmission system or connected to the shaft system structure by key-tooth matching. The strength requirements of the area where the planetary carrier and other components are matched are relatively high. The planetary carriers in the relevant technologies are all made as a whole with the strength requirements of the area where the planetary carrier and other components are matched as the minimum requirements, which makes the overall cost of the planetary carrier too high. If the strength standard of the area where the planetary carrier and other components are matched is lowered, the service life of the planetary carrier will be affected. Summary of the invention

[0004] The embodiments of the present application provide a planetary carrier, a gear box and a wind turbine generator set. The planetary carrier can ensure its own strength requirements and has low cost and long service life.

[0005] On the one hand, according to an embodiment of the present application, a planetary carrier is proposed, comprising: a first frame body, comprising a transmission shaft and a connecting body, spline teeth are arranged on the outer periphery of the transmission shaft on the side away from the connecting body, and a plurality of spline teeth are distributed along the circumference of the transmission shaft; a second frame body, arranged on the side of the connecting body axially away from the transmission shaft, and the second frame body is configured to be connected to the transmission wheel; a connecting component, arranged on the first frame body and the second frame body, and the first frame body and the second frame body are detachably connected to each other through the connecting component.

[0006] According to one aspect of an embodiment of the present application, the connecting component includes a first connecting member, the first connecting member includes a positioning member and a locking member, the positioning member is inserted into the connecting body and the second frame, the locking member is inserted into the positioning member, one end of the locking member is fixedly connected to one of the connecting body and the second frame and the other end abuts against the positioning member to fix the relative positions of the first frame and the second frame.

[0007] According to one aspect of the embodiment of the present application, there are multiple first connecting members, and the multiple first connecting members are distributed at intervals in the circumferential direction.

[0008] According to one aspect of an embodiment of the present application, the positioning member includes a pin shaft having a mounting hole therein, the mounting hole including a first hole section, a second hole section, and a first step surface connected to the first hole section and the second hole section, one end of the locking member abuts against the first step surface, and the end of the locking member axially away from the first step surface protrudes out of the positioning member and is threadedly connected to the connector or the second frame.

[0009] According to one aspect of the embodiment of the present application, a first through hole is provided on one of the connecting body and the second frame body in the axial direction, and a plug-in hole arranged opposite to the first through hole is provided on the other body, a pin shaft is inserted into the first through hole and the plug-in hole and axially abuts against the inner wall surface enclosing the first through hole, and the locking member includes a threaded member, which is inserted into the pin shaft through the mounting hole and is coaxially arranged with the pin shaft, and the threaded member partially protrudes out of the pin shaft in the axial direction and is threadedly connected to the connecting body or the second frame body.

[0010] According to one aspect of the embodiment of the present application, a first limiting member is provided in the positioning member along the axial direction, and the first limiting member abuts against the locking member to limit the locking member from moving along the axial direction.

[0011] According to one aspect of the embodiment of the present application, a second limiting member is disposed on one of the connecting body and the second frame along the axial direction, and the second limiting member abuts against the positioning member to limit the movement of the positioning member along the axial direction.

[0012] According to one aspect of an embodiment of the present application, the connecting assembly also includes a second connecting member, which is plugged into and connected between the connecting body and the second frame. The second connecting member is detachably connected to at least one of the connecting body and the second frame. The second frame is indirectly connected to the transmission wheel via the second connecting member, and the transmission wheel can be sleeved on the second connecting member and rotatably connected to the second connecting member.

[0013] According to one aspect of an embodiment of the present application, the second frame includes a base and a support body, the base is axially spaced apart from the connecting body, the number of the support bodies is two or more and they are circumferentially spaced apart, one end of each support body is fixedly connected to the base and the other end is detachably connected to the connecting body, the second connecting member is detachably connected between the base and the connecting body, and the transmission wheel can be arranged between the base and the connecting body and rotatably connected to the second connecting member.

[0014] According to one aspect of an embodiment of the present application, there are multiple second connecting members, and the multiple second connecting members are spaced apart in the circumferential direction and located on the same pitch circle. A support body is arranged between two adjacent second connecting members along the circumferential direction, and each second connecting member is used to be rotatably connected to one of the transmission wheels.

[0015] According to one aspect of an embodiment of the present application, the second connecting member includes a fixed shaft and a locking cap, the fixed shaft includes a first shaft segment and a second shaft segment distributed along the axial direction, the radial dimension of the first shaft segment is larger than the radial dimension of the second shaft segment and forms a first transition surface, the first transition surface abuts against one of the base and the connecting body, the second shaft segment protrudes axially from the other of the base and the connecting body and is detachably connected to the locking cap, and the second shaft segment can be rotatably connected to the transmission wheel.

[0016] According to one aspect of the embodiment of the present application, along the axial direction, a surface of one of the connecting body and the base body facing away from the other is recessed to provide a recess, and the locking cap is located in the recess and is threadedly connected to the second shaft segment.

[0017] According to one aspect of the embodiment of the present application, the hardness of the transmission shaft is greater than the hardness of the second frame.

[0018] On the other hand, according to an embodiment of the present application, there is provided a gearbox, comprising the above-mentioned planetary carrier; a transmission wheel, which is arranged on a second frame and is directly or indirectly connected to the second frame.

[0019] In yet another aspect, according to an embodiment of the present application, a wind turbine generator set is provided, comprising the above-mentioned gearbox.

[0020] According to the planetary carrier, gearbox and wind turbine generator set provided in the embodiments of the present application, the planetary carrier includes a first frame body, a second frame body and a connecting assembly which are separately arranged. The first frame body includes a transmission shaft and a connecting body. By arranging spline teeth on the transmission shaft, the planetary carrier can cooperate with other components in transmission. The second frame body is used to install the transmission wheel. The setting of the connecting assembly can connect and fix the first frame body and the second frame body, so that the first frame body and the second frame body can be separately processed and manufactured and then connected as a whole through the connecting assembly. The planetary carrier does not need to be manufactured as a whole. Only the first frame body with spline teeth can be made of high-strength material. Not only can the overall strength requirements of the planetary carrier be guaranteed, but also when the spline teeth are worn, only the first frame body can be replaced to ensure that the planetary carrier can continue to be used, thereby increasing the service life of the planetary carrier. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

[0022] Figure 1 is a schematic diagram of the structure of a wind turbine generator set according to an embodiment of the present application;

[0023] Figure 2 is a schematic structural diagram of a gearbox according to an embodiment of the present application;

[0024] Figure 3 This is a schematic diagram of the cooperation between the planet carrier and the transmission wheel in one embodiment of the present application;

[0025] Figure 4 yes Figure 3 The cross-sectional view along the AA direction;

[0026] Figure 5 is a schematic structural diagram of a planet carrier according to an embodiment of the present application;

[0027] Figure 6 yes Figure 4 A partial enlarged view of point B in the middle;

[0028] Figure 7 is a partial cross-sectional view of a planet carrier according to an embodiment of the present application;

[0029] Figure 8 A schematic structural diagram of a first connecting member according to an embodiment of the present application;

[0030] Fig. 9 yes Figure 4 A partial enlarged view of point C in the middle.

[0031] in:

[0032] 100-Gear box;

[0033] 1-Planet carrier;

[0034] 10-first frame; 11-transmission shaft; 111-spline teeth; 12-connector; 121-first through hole; 1211-third hole section; 1212-fourth hole section; 1213-second step surface; 122-recess;

[0035] 20-second frame; 21-base; 22-support body; 221-insertion hole;

[0036] 30-connecting assembly; 31-first connecting member; 311-positioning member; 3111-pin shaft; 3112-mounting hole; 3112a-first hole section; 3112b-second hole section; 3112c-first step surface; 312-locking member; 3121-threaded member; 313-first limiting member; 314-second limiting member; 32-second connecting member; 321-fixed shaft; 3211-first shaft section; 3212-second shaft section; 3213-first transition surface; 322-locking cap;

[0037] 2- transmission wheel;

[0038] 3-Bearings;

[0039] 200-tower; 300-nacelle; 400-generator; 500-impeller; 501-hub; 502-blade;

[0040] X-axial direction; Y-radial direction; Z-circumferential direction.

[0041] In the drawings, the same reference numerals are used for the same components. The drawings are not drawn to scale. DETAILED DESCRIPTION

[0042] The features and exemplary embodiments of various aspects of the present application will be described in detail below. In the detailed description below, many specific details are proposed to provide a comprehensive understanding of the present application. However, it is obvious to those skilled in the art that the present application can be implemented without the need for some of these specific details. The following description of the embodiments is only to provide a better understanding of the present application by illustrating examples of the present application. In the accompanying drawings and the following description, at least some of the known structures and technologies are not shown to avoid unnecessary ambiguity in the present application; and, for clarity, the size of some structures may be exaggerated. In addition, the features, structures or characteristics described below may be combined in one or more embodiments in any suitable manner.

[0043] The directional words appearing in the following description are all directions shown in the figures, and do not limit the specific structures of the planetary carrier, gearbox and wind turbine generator set of this application. In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "installation" 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 directly connected or indirectly connected. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0044] like Figure 1 As shown, the wind turbine generator set provided in the embodiment of the present application includes a tower 200, a nacelle 300, a generator 400, a gearbox 100 and an impeller 500. The tower 200 is connected to the wind turbine foundation, the nacelle 300 is arranged at the top of the tower 200, the nacelle 300 includes a base, and the nacelle 300 can be connected to the tower 200 through the base. The generator 400 and the gearbox 100 are arranged in the nacelle 300, and the impeller 500 includes a hub 501 and blades 502, and the hub 501 is connected to the generator 400 through the gearbox 100. When the wind acts on the blades 502, the blades 502 can be driven to drive the hub 501 to rotate, and the hub 501 drives the rotor of the generator 400 to rotate relative to the stator through the gearbox 100, so as to realize the conversion of wind energy into electrical energy.

[0045] The planetary carrier 1 of the gearbox 100 usually needs to cooperate with other components in transmission, for example, it is connected to the upper-level planetary system in the transmission system or to the shaft system structure by means of key teeth cooperation. The strength requirement of the area where the planetary carrier 1 cooperates with other components in transmission is relatively high. In the gearbox in the related art, the planetary carrier 1 is manufactured as a whole according to the strength requirement of the area where the planetary carrier cooperates with other components during molding, which makes the overall cost of the planetary carrier 1 too high. If the strength standard of the area where the planetary carrier 1 cooperates with other components in transmission is lowered, the service life of the planetary carrier 1 will be affected.

[0046] like Figure 2 As shown, based on this, the present application also provides a gearbox 100, which improves the structure of its planet carrier 1, and the planet carrier 1 can ensure its own strength requirements, and has low cost and long service life. The gearbox 100 includes a planet carrier 1 and a transmission wheel 2, and the transmission wheel 2 is arranged on the planet carrier 1 and rotates with the planet carrier 1.

[0047] The planet carrier 1 provided in one embodiment of the present application may be produced and sold as an independent product, and of course, may also be used in the gearbox 100 and serve as a component of the gearbox 100 .

[0048] like Figures 2 to 5 As shown, a planetary carrier 1 provided in one embodiment of the present application includes a first frame 10 and a second frame 20, the first frame 10 includes a transmission shaft 11 and a connecting body 12, a spline tooth 111 is provided on the outer periphery of the transmission shaft 11 away from the connecting body 12, and a plurality of spline teeth 111 are distributed along the circumferential direction Z of the transmission shaft 11, the second frame 20 is provided on the side of the connecting body 12 away from the transmission shaft 11 in the axial direction X of the transmission shaft 11, and the second frame 20 is configured to be connected to the transmission wheel 2. A connecting assembly 30 is provided on the first frame 10 and the second frame 20, and the first frame 10 and the second frame 20 are detachably connected to each other through the connecting assembly 30.

[0049] The transmission shaft 11 and the connecting body 12 can be connected in a fixed manner, which can be welded or an integrated structure. A plurality of spline teeth 111 are distributed successively in the circumferential direction Z of the transmission shaft 11 .

[0050] The connector 12 may be in the form of a disk-shaped structure, and may be a circular disk or a polygonal disk-shaped structure.

[0051] The second frame 20 may be used to install the transmission wheel 2 , and an interface for the transmission wheel 2 may be provided on the second frame 20 , and the interface includes but is not limited to a through hole or a blind hole.

[0052] The connection assembly 30 can ensure the connection between the first frame 10 and the second frame 20 , and can also ensure that the connection assembly 30 can be separated from at least one of the first frame 10 and the second frame 20 when the first frame 10 and the second frame 20 need to be separated.

[0053] A planetary carrier 1 provided in an embodiment of the present application includes a first frame body 10, a second frame body 20 and a connecting assembly 30 which are separately arranged. The first frame body 10 includes a transmission shaft 11 and a connecting body 12. By arranging spline teeth 111 on the transmission shaft 11, the planetary carrier 1 can cooperate with other components in transmission. The second frame body 20 is used to install the transmission wheel 2. The arrangement of the connecting assembly 30 can connect and fix the first frame body 10 and the second frame body 20, so that the first frame body 10 and the second frame body 20 can be separately processed and then connected as a whole through the connecting assembly 30. The planetary carrier 1 does not need to be manufactured as a whole. Only the first frame body 10 provided with the spline teeth 111 can be made of high-strength material, which can not only ensure the overall strength requirements of the planetary carrier 1, but also when the spline teeth 111 are worn, only the first frame body 10 can be replaced to ensure that the planetary carrier 1 can continue to be used, thereby increasing the service life of the planetary carrier 1.

[0054] like Figures 4 to 8 As shown, in some optional embodiments, a planetary carrier 1 is provided in one embodiment of the present application, and a connecting assembly 30 includes a first connecting member 31, and the first connecting member 31 includes a positioning member 311 and a locking member 312. The positioning member 311 is inserted into the connecting body 12 and the second frame 20, and the locking member 312 is inserted into the positioning member 311. One end of the locking member 312 is fixedly connected to the connecting body 12 and one of the second frame 20 and the other end abuts against the positioning member 311 to fix the relative positions of the first frame 10 and the second frame 20.

[0055] The positioning member 311 includes but is not limited to a positioning pin, a positioning bolt, etc. A mounting hole 3112 may be provided in the positioning member 311, and the locking member 312 may be inserted into the positioning member 311 through the mounting hole 3112. One end of the locking member 312 may be fixedly connected to one of the connecting body 12 and the second frame body 20 by means of threaded connection or the like, and the other end of the locking member 312 may abut against the positioning member 311.

[0056] A planetary carrier 1 provided by an embodiment of the present application has a connecting component 30 including a first connecting member 31, and the first connecting member 31 includes a locking member 312 and a positioning member 311. The setting of the positioning member 311 can provide positioning for the installation of the locking member 312, and the connecting body 12 and the second frame body 20 are connected and fixed by the locking member 312. At the same time, the positioning member 311 plays an anti-shear function, which can not only ensure the connection strength between the first frame body 10 and the second frame body 20, but also ensure the overall anti-shear ability of the planetary carrier 1.

[0057] In some optional embodiments, in a planet carrier 1 provided by an embodiment of the present application, there are multiple first connecting members 31, and the multiple first connecting members 31 are distributed at intervals in the circumferential direction Z.

[0058] The number of the first connecting members 31 may be two, three or more.

[0059] The plurality of first connecting members 31 are spaced apart and evenly arranged in the circumferential direction Z, and the angles between every two adjacent second connecting members 32 in the circumferential direction Z may be equal.

[0060] The planetary carrier 1 provided in one embodiment of the present application can improve the connection strength between the first frame body 10 and the second frame body 20 by providing a plurality of first connecting members 31 which are spaced apart in the circumferential direction Z of the transmission shaft 11 .

[0061] Continue reading Figures 4 to 8 As shown in some optional embodiments, the positioning member 311 includes a pin shaft 3111, and the pin shaft 3111 has a mounting hole 3112. The mounting hole 3112 includes a first hole section 3112a, a second hole section 3112b, and a first step surface 3112c connected to the first hole section 3112a and the second hole section 3112b. One end of the locking member 312 abuts against the first step surface 3112c, and one end of the locking member 312 that is away from the first step surface 3112c in the axial direction X protrudes out of the positioning member 311 and is threadedly connected to the connecting body 12 or the second frame 20.

[0062] The radial dimension of the first hole section 3112a may be greater than that of the second hole section 3112b. The insertion and mounting hole 3112 may be a stepped hole as a whole and penetrate the positioning member 311 in the axial direction X. The locking member 312 may be a stepped rod and match the shape of the insertion hole 221 .

[0063] The planet carrier 1 provided in one embodiment of the present application can connect the first frame 10 and the second frame 20 through the locking member 312 through the above configuration. At the same time, the locking member 312 can limit the position of the positioning member 311 in the first frame 10 and the second frame 20, thereby ensuring the anti-shear effect of the locking member 312.

[0064] like Figures 2 to 8 As shown, in some optional embodiments, a planetary carrier 1 provided by an embodiment of the present application, along the axial direction X, a first through hole 121 is provided on one of the connecting body 12 and the second frame body 20, and a plug-in hole 221 arranged opposite to the first through hole 121 is provided on the other, the pin shaft 3111 is inserted into the first through hole 121 and the plug-in hole 221 and abuts against the inner wall surface enclosing the first through hole 121 along the axial direction X, the locking member 312 includes a threaded member 3121, the threaded member 3121 is inserted into the pin shaft 3111 and is coaxially arranged with the pin shaft 3111, the threaded member 3121 partially protrudes from the pin shaft 3111 in the axial direction X and is threadedly connected to the connecting body 12 or the second frame body 20.

[0065] The planetary carrier 1 provided in one embodiment of the present application can improve the connection strength between the first frame body 10 and the second frame body 20 through the above-mentioned configuration, and at the same time, it is beneficial to ensure the position locking requirement of the locking member 312 and ensure the anti-shear function of the locking member 312.

[0066] The plugging hole 221 may be a through hole, and of course, the plugging hole 221 may also be a blind hole.

[0067] Optionally, the first through hole 121 may be provided on the connecting body 12, and the plug hole 221 may be provided on the second frame 20. The pin 3111 may be inserted into the first through hole 121 and the plug hole 221 from one side of the first through hole 121 along the axial direction X. Of course, the first through hole 121 may also be provided on the second frame 20, and the plug hole 221 may be provided on the connecting body 12. In this case, the pin 3111 may also be inserted into the first through hole 121 and the plug hole 221 from one side of the first through hole 121 along the axial direction X.

[0068] The first through hole 121 may be a stepped hole, so that the pin 3111 is inserted into the first through hole 121 and abuts against the inner wall surface enclosing the first through hole 121. Optionally, the first through hole 121 may include a third hole section 1211, a fourth hole section 1212 and a second step surface 1213, and the pin 3111 may be a stepped shaft, and the pin 3111 is inserted into the first through hole 121 and the plug hole 221 and at least partially abuts against the second step surface 1213.

[0069] The threaded member 3121 is located in the mounting hole 3112 of the pin shaft 3111 . The threaded member 3121 may be in the shape of a stepped rod and match the shape of the mounting hole 3112 .

[0070] In the planetary carrier 1 provided by an embodiment of the present application, a first limiting member 313 is provided in the positioning member 311 along the axial direction X of the transmission shaft 11 , and the first limiting member 313 abuts against the locking member 312 to limit the movement of the locking member 312 along the axial direction X.

[0071] The first limiting member 313 may be a limiting structure such as a retaining ring.

[0072] The planetary carrier 1 provided in one embodiment of the present application can limit the movement of the locking member 312 along the axial direction X by setting the first limit member 313 and making the first limit member 313 set at the positioning member 311, that is, it can prevent the locking member 312 from loosening and ensure the stability of the connection between the first frame 10 and the second frame 20.

[0073] In some optional embodiments, a planetary carrier 1 provided in an embodiment of the present application is provided with a second limit member 314 along the axial direction X on one of the connecting body 12 and the second frame body 20, and the second limit member 314 abuts against the positioning member 311 to limit the movement of the positioning member 311 along the axial direction X.

[0074] The second limiting member 314 can be a limiting structure such as a retaining ring.

[0075] like Figures 4 to 9 As shown, a planetary carrier 1 provided in an embodiment of the present application is provided with a second limit member 314, and the second limit member 314 abuts against the positioning member 311, and optionally abuts against the end face of the positioning member 311 along the axial direction X, so as to limit the movement of the positioning member 311 along the axial direction X, that is, the positioning member 311 can be prevented from loosening, thereby ensuring the relative position between the positioning member 311 and the first frame body 10 and the second frame body 20, and ensuring the shear resistance of the planetary carrier 1.

[0076] like Figures 4 to 9 As shown, in some optional embodiments, a planetary carrier 1 is provided in one embodiment of the present application, and the connecting assembly 30 also includes a second connecting member 32, and the second connecting member 32 is plugged and connected between the connecting body 12 and the second frame body 20, and the second connecting member 32 is detachably connected to at least one of the connecting body 12 and the second frame body 20, and the second frame body 20 is indirectly connected to the transmission wheel 2 through the second connecting member 32, and the transmission wheel 2 can be sleeved on the second connecting member 32 and rotatably connected to the second connecting member 32.

[0077] The second connecting member 32 can be connected to both the connecting body 12 and the second frame 20 in a detachable manner. Of course, the second connecting member 32 can also be connected to one of the connecting body 12 and the second frame 20 in a detachable manner.

[0078] The transmission wheel 2 can be sleeved on the second connecting member 32 and can be rotatably connected to the second connecting member 32 via structural members such as bearings 3.

[0079] The planetary carrier 1 provided in the embodiment of the present application, by making the connecting assembly 30 also include a second connecting member 32, and the positional relationship between the second connecting member 32, the connecting body 12, the second frame body 20, and the transmission wheel 2, so that the second connecting member 32 can not only be used as a connecting structure, but also can be used as a supporting shaft of the transmission wheel 2, so that the second connecting member 32 can perform multiple functions simultaneously, so that the overall structural strength of the planetary carrier 1 is high, and the functions of the components can be reused, thereby making the overall structure of the gearbox 100 used in the planetary carrier 1 compact and low-cost.

[0080] In some optional embodiments, an embodiment of the present application provides a planetary carrier 1, wherein the second frame body 20 includes a base 21 and a support body 22, the base 21 is spaced apart from the connecting body 12 in the axial direction X, the number of the support bodies 22 is more than two and they are spaced apart in the circumferential direction Z, one end of each support body 22 is fixedly connected to the base 21 and the other end is detachably connected to the connecting body 12, the second connecting member 32 is detachably connected between the base 21 and the connecting body 12, and the transmission wheel 2 can be arranged between the base 21 and the connecting body 12 and is rotatably connected to the second connecting member 32.

[0081] The number of the supporting bodies 22 may be two, three or more, and three may be selected, and an escape opening is formed between two adjacent supporting bodies 22. When the planet carrier 1 includes the first connecting member 31, the positioning member 311 may be plugged into the connecting body 12 and the supporting body 22, and one end of the locking member 312 is fixedly connected to one of the connecting body 12 and the supporting body 22 and the other end abuts against the positioning member 311 to fix the relative position of the first frame 10 and the second frame 20.

[0082] The support body 22 and the base body 21 may be connected by welding or the like, and of course, may also be an integrated structure.

[0083] When the planet carrier 1 is applied to the gear box 100, each second connecting member 32 can be provided with a transmission wheel 2, which can also be called a planetary wheel. Each transmission wheel 2 is rotationally matched with the second connecting member 32 where it is located. The transmission wheel 2 can be located between two adjacent support bodies 22 and protrude from the planet carrier 1 through the avoidance opening to cooperate with the ring gear, sun gear and other structures. The sun gear can be used as a component of the gear box to cooperate with multiple transmission wheels 2.

[0084] In a planetary carrier 1 provided in an embodiment of the present application, the second frame body 20 adopts the above-mentioned structure, which can not only ensure the connection requirements with the first frame body 10, but also ensure the installation requirements of the transmission wheel 2, which is beneficial to the connection of the second connecting member 32 and the functional reuse of the rotation cooperation with the transmission wheel 2.

[0085] In some optional embodiments, an embodiment of the present application provides a planetary carrier 1, wherein the number of second connecting members 32 is multiple, and the multiple second connecting bodies 12 are spaced apart in the circumferential direction Z and are located on the same pitch circle, and a support body 22 is provided between two adjacent second connecting members 32 along the circumferential direction Z, and each second connecting member 32 is used for rotationally connecting to one of the transmission wheels 2.

[0086] The planet carrier 1 provided in the embodiment of the present application can ensure the installation requirements of multiple transmission wheels 2 through the above configuration. In addition, the above configuration makes the bearing capacity of the planet carrier 1 evenly distributed, ensuring the overall safety of the planet carrier 1.

[0087] Continue reading Figures 4 to 9 As shown, in some optional embodiments, an embodiment of the present application provides a planetary carrier 1, the second connecting member 32 includes a fixed shaft 321 and a locking cap 322, the fixed shaft 321 includes a first shaft segment 3211 and a second shaft segment 3212 distributed along the axial direction X, the radial dimension of the first shaft segment 3211 is greater than the radial dimension of the second shaft segment 3212 and is formed with a first transition surface 3213, the first transition surface 3213 abuts against one of the base 21 and the connecting body 12, the second shaft segment 3212 protrudes from the other of the base 21 and the connecting body 12 along the axial direction X and is detachably connected to the locking cap 322, and the second shaft segment 3212 can be rotatably connected to the transmission wheel 2.

[0088] The first transition surface 3213 can be abutted against the base 21, and the second shaft section 3212 protrudes from the connecting body 12 along the axial direction X and is detachably connected to the locking cap 322. Of course, the first transition surface 3213 can also be abutted against the connecting body 12, and the second shaft section 3212 protrudes from the base 21 along the axial direction X and is detachably connected to the locking cap 322. The transmission wheel 2 can be sleeved on the second shaft section 3212 and rotated with the second shaft section 3212 through structural parts such as the bearing 3.

[0089] In the planetary carrier 1 provided in one embodiment of the present application, the second connecting member 32 adopts the above-mentioned structural form, which can not only ensure the connection strength requirement between the first frame body 10 and the second frame body 20, but also ensure the rotation coordination requirement with the transmission wheel 2.

[0090] In some optional embodiments, an embodiment of the present application provides a planetary carrier 1, along the axial direction X, a surface depression of one of the connecting body 12 and the base body 21 facing away from the other is provided with a recess 122, and the locking cap 322 is located in the recess 122 and is threadedly connected to the second shaft segment 3212.

[0091] Optionally, when the locking cap 322 abuts against the connecting body 12 , a recess 122 may be provided on the connecting body 12 , and when the locking cap 322 abuts against the base body 21 , a recess 122 may be provided on the base body 21 .

[0092] The planet carrier 1 provided in one embodiment of the present application has a recess 122, which can provide a positioning space for the locking cap 322 and constrain the position of the locking cap 322 and the fixed shaft 321 connected to the locking cap 322. At the same time, it can also reduce or avoid the locking cap 322 protruding from the connector 12 or the base 21 to avoid other components, and the recess 122 can also reduce the overall weight of the planet carrier 1, achieving the effect of reducing weight and cost.

[0093] In some optional embodiments, in a planetary carrier 1 provided by an embodiment of the present application, the hardness of the transmission shaft 11 is greater than the hardness of the second carrier body 20 .

[0094] Optionally, the first frame body 10 may be provided with a partial hardening treatment of the spline teeth 111 . Optionally, the first frame body 10 may be made of cast steel.

[0095] Optionally, the second frame 20 may be made of cast iron, and optionally, may be made of spheroidal milled cast iron.

[0096] The planet carrier 1 provided in one embodiment of the present application can improve the wear resistance of the transmission shaft 11 by making the hardness of the transmission shaft 11 greater than the hardness of the second frame body 20, ensure the wear resistance of the position of its spline teeth 111, and improve the overall service life of the planet carrier 1. At the same time, this setting method reduces the mass and cost of the planet carrier 1 while ensuring the overall strength and service life of the planet carrier 1.

[0097] It should be noted that the planet carrier 1 provided in one embodiment of the present application, its connection assembly 30 may include the first connection member 31 alone, or the second connection member 32 alone, and of course, may include both the first connection member 31 and the second connection member 32. The above three forms can not only make the planet carrier 1 split, but also ensure the connection strength between the first frame 10 and the second frame 20, and when the second connection member 32 is included, the second connection member 32 can not only ensure the connection requirements of the first frame 10 and the second frame 20, but also reuse it as a planet shaft that rotates with the transmission wheel 2, so that the planet carrier 1 has high overall strength, compact structure and low cost.

[0098] The gearbox 100 provided in one embodiment of the present application includes the planet carrier 1 and the transmission wheel 2 provided in the above embodiments. The number of the transmission wheels 2 can be multiple, and the multiple transmission wheels 2 can be distributed along the circumferential direction Z of the transmission shaft 11, and each transmission wheel 2 is rotatably connected to the second frame 20. When the connecting assembly 30 includes the second connecting member 32, the number of the second connecting members 32 can be equal to the number of the transmission wheels 2, and each transmission wheel 2 is sleeved and rotatably connected to a second connecting member 32. The gearbox 100 adopts the above structure, and because it includes the above planet carrier 1, its overall structural strength is high, maintenance is convenient, and the service life is long.

[0099] The wind turbine generator set provided in one embodiment of the present application includes the gearbox 100 provided in the above embodiments, the transmission shaft 11 can be directly or indirectly connected to the hub 501, the number of transmission wheels 2 can be multiple, and the multiple transmission wheels 2 can cooperate with the ring gear and the sun gear to achieve the transmission of kinetic energy. The wind turbine generator set 400 has a long overall service life and better power generation efficiency.

[0100] Although the present application has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there are no structural conflicts. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A planet carrier, characterized in that: include: The first frame includes a transmission shaft and a connecting body, wherein the transmission shaft is provided with spline teeth on the outer circumference of a side away from the connecting body, and a plurality of the spline teeth are distributed along the circumference of the transmission shaft; A second frame body is arranged on a side of the connecting body that is away from the transmission shaft in the axial direction of the transmission shaft, and the second frame body is configured to be connected to the transmission wheel; The connecting component is disposed on the first frame and the second frame, and the first frame and the second frame are detachably connected to each other through the connecting component.

2. The planet carrier according to claim 1, characterized in that: The connecting component includes a first connecting member, which includes a positioning member and a locking member. The positioning member is inserted into the connecting body and the second frame, and the locking member is inserted into the positioning member. One end of the locking member is fixedly connected to one of the connecting body and the second frame and the other end abuts against the positioning member to fix the relative positions of the first frame and the second frame.

3. The planet carrier according to claim 2, characterized in that: There are multiple first connecting members, and the multiple first connecting members are distributed at intervals in the circumferential direction.

4. The planet carrier according to claim 2, characterized in that: The positioning member includes a pin shaft having a mounting hole therein, the mounting hole including a first hole section, a second hole section, and a first step surface connected to the first hole section and the second hole section, one end of the locking member abuts against the first step surface, and the end of the locking member that is away from the first step surface in the axial direction protrudes from the positioning member and is threadedly connected to the connector or the second frame.

5. The planet carrier according to claim 4, characterized in that: Along the axial direction, a first through hole is provided on one of the connecting body and the second frame body, and a plug-in hole arranged opposite to the first through hole is provided on the other. The pin shaft is inserted into the first through hole and the plug-in hole and abuts against the inner wall surface enclosing the first through hole along the axial direction. The locking member includes a threaded member, which is inserted into the pin shaft through the mounting hole and is coaxially arranged with the pin shaft. The threaded member partially protrudes from the pin shaft in the axial direction and is threadedly connected to the connecting body or the second frame body.

6. The planet carrier according to claim 2, characterized in that: Along the axial direction, a first limiting member is disposed in the positioning member, and the first limiting member abuts against the locking member to limit the movement of the locking member along the axial direction; And / or, along the axial direction, a second limiting member is disposed on one of the connecting body and the second frame, and the second limiting member abuts against the positioning member to limit the movement of the positioning member along the axial direction.

7. The planet carrier according to any one of claims 1 to 6, characterized in that: The connecting assembly also includes a second connecting member, which is plugged and connected between the connecting body and the second frame. The second connecting member is detachably connected to at least one of the connecting body and the second frame. The second frame is indirectly connected to the transmission wheel via the second connecting member, and the transmission wheel can be sleeved on the second connecting member and rotatably connected to the second connecting member.

8. The planet carrier according to claim 7, characterized in that: The second frame includes a base and a support body, the base is spaced apart from the connecting body in the axial direction, the number of the support bodies is more than two and they are spaced apart in the circumferential direction, one end of each of the support bodies is fixedly connected to the base and the other end is detachably connected to the connecting body, the second connecting member is detachably connected between the base and the connecting body, and the transmission wheel can be arranged between the base and the connecting body and is rotatably connected to the second connecting member.

9. The planet carrier according to claim 8, characterized in that: There are multiple second connecting members, and the multiple second connecting members are spaced apart in the circumferential direction and located on the same pitch circle. Along the circumferential direction, the support body is arranged between two adjacent second connecting members, and each second connecting member is used for rotationally connecting to one of the transmission wheels.

10. The planet carrier according to claim 8, characterized in that: The second connecting member includes a fixed shaft and a locking cap, the fixed shaft includes a first shaft segment and a second shaft segment distributed along the axial direction, the radial dimension of the first shaft segment is larger than the radial dimension of the second shaft segment and forms a first transition surface, the first transition surface abuts against one of the base and the connecting body, the second shaft segment protrudes from the other of the base and the connecting body along the axial direction and is detachably connected to the locking cap, and the second shaft segment can be rotatably connected to the transmission wheel.

11. The planet carrier according to claim 10, characterized in that: Along the axial direction, a surface of one of the connecting body and the base body facing away from the other is recessed to form a recess, and the locking cap is located in the recess and is threadedly connected to the second shaft segment.

12. The planet carrier according to any one of claims 1 to 6, characterized in that: The hardness of the transmission shaft is greater than the hardness of the second frame.

13. A gear box, characterized in that: include: A planet carrier as claimed in any one of claims 1 to 12; The transmission wheel is arranged on the second frame and is directly or indirectly connected to the second frame.

14. A wind turbine generator set, characterized in that: Comprising a gearbox as claimed in claim 13.

Images