CN217545799U - Transmission system and wind generating set - Google Patents

Abstract

The application relates to a transmission system and wind generating set, transmission system includes: the gear box comprises a box body, an output shaft and a bearing, wherein the output shaft is rotationally connected with the box body through the bearing; the generator comprises a rotor, a stator and a packaging assembly, wherein the stator is connected with a box body, the rotor is connected with an output shaft through the packaging assembly, the packaging assembly comprises a sealing cover, a first connecting piece and an insulating piece, the insulating piece comprises an inner insulating part, an insulating sleeve and an outer insulating part, the first connecting piece is connected to the sealing cover and the rotor in an inserting mode, the first connecting piece is arranged in an insulating mode through the insulating sleeve and the outer insulating part and the sealing cover, and the rotor and the sealing cover are arranged in an insulating mode through the inner insulating part. According to the transmission system and the wind generating set, the influence of shaft voltage on the bearing can be reduced, and the cost is low.

Description

Transmission system and wind generating set

Technical Field

The application relates to the technical field of wind power, in particular to a transmission system and a wind generating set.

Background

The transmission system generally includes a gearbox and a generator, an output shaft of the gearbox can obtain kinetic energy, and the kinetic energy is transmitted to a rotor of the generator through the output shaft after multi-stage acceleration or deceleration, so that the rotor of the generator rotates relative to a stator of the generator, and conversion of the kinetic energy to electric energy is realized. For example, in the technical field of wind power, a transmission system can acquire kinetic energy of an impeller through a gear box and transmit the kinetic energy to a generator after multi-stage acceleration, so that conversion from the kinetic energy to electric energy is realized.

In order to satisfy the transmission of kinetic energy, a bearing is usually arranged between the output shaft of the gearbox and the gearbox body thereof. Shaft voltages, which are harmful to the bearings, are generated during operation of the generator for various reasons. When the bearing works, a lubricating oil film exists among the inner ring, the rolling body and the outer ring, a certain insulation effect is achieved, the bearing can be protected from being damaged by low shaft voltage, and the oil film is broken down to discharge when the shaft voltage exceeds the withstand voltage value of the oil film. Because the contact area between the bearing rolling body and the inner and outer rings is small, high temperature can be generated at the contact position instantly, and the bearing is locally fused.

Therefore, in order to protect the bearing, it is necessary to block the path of the shaft current flowing through the bearing. The existing blocking mode usually adopts an insulating bearing, the insulating bearing is generally made of ceramic materials, and for a transmission system, the cost of the transmission system is high due to the insulating bearing, and the market competitiveness is low.

Disclosure of Invention

The embodiment of the application provides a transmission system and a wind generating set, the transmission system can reduce the influence of shaft voltage on a bearing, and the cost is low.

In one aspect, a transmission system is provided according to an embodiment of the present application, including: the gear box comprises a box body, an output shaft and a bearing, wherein the output shaft is rotationally connected with the box body through the bearing; the generator comprises a rotor, a stator and a packaging assembly, wherein the stator is connected with a box body, the rotor is connected with an output shaft through the packaging assembly, the packaging assembly comprises a sealing cover, a first connecting piece and an insulating piece, the insulating piece comprises an inner insulating part, an insulating sleeve and an outer insulating part, the first connecting piece is connected to the sealing cover and the rotor in an inserting mode, the first connecting piece is arranged in an insulating mode through the insulating sleeve and the outer insulating part and the sealing cover, and the rotor and the sealing cover are arranged in an insulating mode through the inner insulating part.

According to an aspect of the embodiment of the application, the first connecting piece comprises a first connecting rod and a first end cap, the first connecting rod is connected to the sealing cover and the rotor in an inserting mode and is in threaded connection with the rotor, the first end cap is arranged at one end, away from the rotor, of the first connecting rod, the first connecting rod is sleeved with the insulating sleeve, the inner insulating portion is clamped between the sealing cover and the rotor, and the outer insulating portion is clamped between the first end cap and the sealing cover.

According to an aspect of an embodiment of the present application, the package assembly further includes a protection gasket clamped between the inner insulating part and the rotor.

According to an aspect of the embodiment of the application, the protection gasket comprises a main body ring and a positioning part connected with the main body ring, the main body ring is clamped between the inner insulating part and the rotor, and the positioning part is inserted into the rotor.

According to an aspect of the embodiment of the application, one end of the insulating sleeve abuts against the rotor, and the inner insulating part and the protective gasket are both sleeved on the periphery of the insulating sleeve.

According to an aspect of an embodiment of the present application, the package assembly further includes a force equalizing ring sandwiched between the outer insulating portion and the first end cap.

According to one aspect of the embodiment of the application, the inner insulating part is annular and is connected with the sealing cover and the rotor in an adhesion mode, the inner insulating part comprises more than two arc-shaped insulating sections distributed along the circumferential direction of the output shaft, and the two adjacent insulating sections are mutually spliced or arranged at intervals.

According to an aspect of the embodiment of the present application, the package assembly further includes a second connector, and the second connector is inserted into the cover and the output shaft.

According to an aspect of the embodiment of the application, the gear box further comprises a box cover, the box cover is arranged at one end of the box body and clamped between the box body and the sealing cover, wherein one of the box cover and the sealing cover is provided with a protrusion, the other of the box cover and the sealing cover is provided with a groove, and the protrusion extends into the groove and is in dynamic sealing fit with the groove.

In another aspect, a wind turbine generator set is provided according to an embodiment of the present application, including the transmission system described above.

According to transmission system and wind generating set that this application embodiment provided, transmission system includes gear box and generator, and the rotor passes through the encapsulation subassembly and is connected with the output shaft, and the stator is connected with the box, and the kinetic energy that the output shaft acquireed can drive the rotor through the encapsulation subassembly and rotate for the stator, realizes the conversion of electric energy. Because the encapsulation subassembly includes the closing cap, first connecting piece and insulating part, the insulating part includes interior insulation portion, insulating cover and outer insulation portion, first connecting piece grafting is connected in closing cap and rotor, first connecting piece passes through insulating cover and outer insulation portion and the insulating setting of closing cap, rotor and closing cap pass through the insulating setting of interior insulation portion, can guarantee the connection demand between rotor and the closing cap through first connecting piece, make the closing cap can transmit to the rotor by the kinetic energy that the output shaft obtained, guarantee the demand of generating electricity. And, the transmission path of shaft voltage between rotor and the closing cap can be blocked in the setting of insulating part, avoids the shaft voltage to cause the damage to the bearing to this kind of setting mode, no matter bearing or first connecting piece itself all need not to adopt insulating material to make, low cost, and intensity is high, long service life.

Drawings

Features, advantages and technical effects of exemplary embodiments of the present application will be described below with reference to the accompanying drawings.

FIG. 1 is a schematic structural diagram of a wind turbine generator system according to an embodiment of the present application;

FIG. 2 is a cross-sectional view of a transmission system according to one embodiment of the present application;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is an enlarged view at B in FIG. 3;

fig. 5 is an enlarged view at C in fig. 3.

Wherein:

1-a transmission system;

10-a gearbox; 11-a box body; 12-an output shaft; 13-a bearing; 14-a box cover; 141-a groove;

20-a generator;

21-a rotor; 211-second via hole;

22-a package assembly;

221-sealing cover; 2211-projection; 2212-first via;

222-a first connector; 2221-first connecting rod; 2222-first end cap;

223-a second connection;

224-an insulator; 2241-insulating sleeve; 2242-an inner insulation part; 2243-outer insulation part;

225-protective gaskets; 2251-a body ring; 2252-a positioning section;

226-a stress-leveling ring;

227-a shim;

2-a tower; 3-a cabin; 4-an impeller; 401-a hub; 402-a blade;

x-axial direction; y-radial direction.

In the drawings, like parts are given like reference numerals. The figures are not drawn to scale.

Detailed Description

Features of various aspects of the present application and exemplary embodiments will be described in detail below. In the following detailed description, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof. In the drawings and the following description, at least some well-known structures and techniques have not been shown in detail in order to avoid unnecessarily obscuring the present application; also, the dimensions of some of the structures may be exaggerated for clarity. Furthermore, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.

The following description is given with the directional terms as they are shown in the drawings and is not intended to limit the specific structure of the drive system and wind turbine generator system of the present application. In the description of the present application, it is also to be noted that, unless otherwise explicitly specified or limited, the terms "mounted" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be directly connected or indirectly connected. The specific meaning of the above terms in this application can be understood as appropriate by one of ordinary skill in the art.

Referring to fig. 1, an embodiment of the present application provides a wind turbine generator system, which includes a tower 2, a nacelle 3, a transmission system 1, and an impeller 4, wherein the tower 2 is connected to a wind turbine foundation, the nacelle 3 is disposed at a top end of the tower 2, the nacelle 3 includes a base, the nacelle 3 can be connected to the tower 2 through the base, the impeller 4 includes a hub 401 and a blade 402, the transmission system 1 is disposed in the nacelle 3, the impeller 4 is connected to the transmission system 1, when wind energy acts on the blade 402, the blade 402 drives the hub 401 to rotate and transmits kinetic energy converted from the wind energy to the transmission system 1, and the kinetic energy is converted into electric energy by the transmission system 1 to be stored.

Referring to fig. 2 to 4, an embodiment of the present invention further provides a transmission system 1, which includes a gearbox 10 and a generator 20, wherein the gearbox 10 includes a box body 11, an output shaft 12 and a bearing 13, and the output shaft 12 is rotatably connected to the box body 11 through the bearing 13. Generator 20 includes rotor 21, stator and encapsulation subassembly 22, the stator is connected with box 11, rotor 21 passes through encapsulation subassembly 22 and is connected with output shaft 12, encapsulation subassembly 22 includes closing cap 221, first connecting piece 222 and insulating part 224, insulating part 224 includes interior insulating part 2242, insulating cover 2241 and outer insulating part 2243, first connecting piece 222 plug-in connection is in closing cap 221 and rotor 21, first connecting piece 222 passes through insulating cover 2241 and outer insulating part 2243 and the insulating setting of closing cap 221, rotor 21 and closing cap 221 pass through the insulating setting of interior insulating part 2242.

Optionally, the gearbox 10 may further include a gear train and an input shaft, the input shaft is connected to an impeller, the impeller converts wind energy into rotational kinetic energy, the rotational kinetic energy is input to the input shaft, the rotational kinetic energy is accelerated by the gear train and then transmitted to the output shaft 12, the output shaft 12 is connected to the rotor 21, and the output shaft 12 is rotatably connected to the box 11 through the bearing 13, so that the output shaft 12 can drive the rotor 21 to rotate relative to the stator to convert the wind energy into electric energy.

Alternatively, the rotor 21 may be located outside the stator, i.e. the generator 20 may be in the form of an outer rotor. Of course, the rotor 21 may also be located inside the stator, i.e. the generator 20 is in the form of an inner rotor. The present exemplary illustration illustrates an inner rotor as an example.

Alternatively, the first connector 222 may itself take the form of an insulator 224, although the first connector 222 may itself be a conductor structure. The first connecting member 222 can be a high-strength metal conductor structure, and has low cost and high connection strength.

Alternatively, the first connection member 222 may extend into the cover 221 and the rotor 21 and connect and fix the cover 221 and the rotor 21.

Alternatively, the cover 221 and the output shaft 12 may be fixed by welding, or may be connected by fastening a connecting member, as long as the kinetic energy of the output shaft 12 can be transmitted to the rotor 21.

Optionally, the insulating sleeve 2241, the inner insulating portion 2242 and the outer insulating portion 2243 may be an integral structure body, and of course, may also be a split structure body, and may be selected as a split structure body, which is beneficial to processing and assembling.

Shaft voltages, which for various reasons can occur during operation of the generator 20, are detrimental to the bearings 13. When the bearing 13 works, a lubricating oil film exists among the inner ring, the rolling body and the outer ring, a certain insulation effect is achieved, the bearing 13 can be protected from being damaged by low shaft voltage, and the oil film can be broken down to discharge when the shaft voltage exceeds the withstand voltage value of the oil film. Because the contact area between the rolling elements of the bearing 13 and the inner and outer rings is small, high temperature can be instantaneously generated at the contact position, so that the bearing 13 is locally fused.

In the existing transmission system, in order to reduce the damage of the shaft voltage to the bearing 13, the bearing 13 is usually selected to be an insulating bearing, the insulating bearing is generally made of ceramic, and for the transmission system 1, the cost is high due to the use of the insulating bearing 13, and the market competitiveness is low.

In the transmission system 1 provided by the embodiment of the application, the rotor 21 is connected with the output shaft 12 through the packaging component 22, the stator is connected with the box body 11, and the kinetic energy acquired by the output shaft 12 can drive the rotor 21 to rotate relative to the stator, so that the conversion of electric energy is realized.

Because encapsulation subassembly 22 includes the closing cap 221, first connecting piece 222 and insulating part 224, insulating part 224 includes interior insulating part 2242, insulating cover 2241 and outer insulating part 2243, first connecting piece 222 is pegged graft in closing cap 221 and rotor 21, first connecting piece 222 passes through insulating cover 2241 and outer insulating part 2243 and the insulating setting of closing cap 221, rotor 21 and closing cap 221 pass through the insulating setting of interior insulating part 2242, can guarantee the connection demand between rotor 21 and the closing cap 221 through first connecting piece 222, make the kinetic energy that closing cap 221 obtained by output shaft 12 can transmit to rotor 21, guarantee the demand of generating electricity. The insulating member 224 is provided to block a transmission path of the shaft voltage between the rotor 21 and the cover 221, thereby preventing a path from being formed and further preventing the shaft voltage from damaging the bearing 13. Moreover, no matter the bearing 13 or the first connecting piece 222 is made of insulating materials, the arrangement mode is low in cost, high in strength and long in service life.

Alternatively, in the axial direction X of the output shaft 12, a first through hole 2212 may be provided in the cover 221, a second through hole 211 may be provided in the rotor 21, the first connector 222 extends into the first through hole 2212 and the second through hole 211, and the insulator 224 may be located between the cover 221 and the first connector 222 to insulate the first connector 222 from the cover 221.

Optionally, an insulating sleeve 2241 may be positioned within the first through-hole 2212 and disposed around the first connector 222. The wall surface of the first through hole 2212 surrounded by the cover 221 and the first connecting piece 222 are insulated by the insulating sleeve 2241.

Alternatively, the inner insulating portion 2242 is at least partially sandwiched between the cover 221 and the rotor 21 in the axial direction X of the output shaft 12, so that the cover 221 and the rotor 21 are arranged in an insulating manner.

Alternatively, the outer insulating portion 2243 is at least partially sandwiched between the cover 221 and the first connector 222 in the axial direction X of the output shaft 12, so that the end surface of the cover 221 in the axial direction X is provided insulated from the first connector 222.

As an optional implementation manner, in the transmission system 1 provided in the embodiment of the present application, the first connection element 222 includes a first connection rod 2221 and a first end cap 2222, the first connection rod 2221 is inserted into the cover 221 and the rotor 21 and is threadedly connected to the rotor 21, the first end cap 2222 is disposed at an end of the first connection rod 2221 away from the rotor 21, the insulation sleeve 2241 is sleeved on the first connection rod 2221, the inner insulation part 2242 is clamped between the cover 221 and the rotor 21, and the outer insulation part 2243 is clamped between the first end cap 2222 and the cover 221.

Alternatively, the first connecting rod 2221 may extend in the axial direction X of the output shaft 12. Optionally, the axis of the first connecting rod 2221 is spaced from and parallel to the axis of the output shaft 12.

Optionally, the radial dimension of first end cap 2222 is greater than the radial dimension of first connector rod 2221.

Alternatively, the first connecting member 222 may include at least one of a bolt and a screw, and a standard member made of metal may be used.

Alternatively, the first connection rod 2221 may be inserted into the second through hole 211 of the rotor 21, an inner wall of the second through hole 211 may be provided with an internal thread, and the first connection rod 2221 extends into the second through hole 211 and is threadedly connected with the rotor 21.

Alternatively, the insulating sleeve 2241 is sleeved on the outer circumference of the first connecting rod 2221, and in the radial direction Y of the output shaft 12, the insulating sleeve 2241 may be clamped between the wall surfaces of the first connecting rod 2221 and the cover 221 which enclose the first through hole 2212.

Alternatively, the inner insulating portion 2242 may be entirely a ring-shaped structure and sandwiched between the cover 221 and the rotor 21. The inner insulating part 2242 may be provided with a penetration hole such that the first connection bar 2221 of the first connector 222 may penetrate the inner insulating part 2242 and protrude into the rotor 21.

Alternatively, the outer insulating part 2243 may be a ring-shaped structural body as a whole and sandwiched between the cover 221 and the first end cap 2222. The outer insulating part 2243 may be provided with a perforation hole thereon so that the first connection rod 2221 of the first connector 222 may pass through the outer insulating part 2243 and be connected with the first end cap 2222.

In the transmission system 1 provided in the embodiment of the present application, the first connection element 222 adopts a form of the first connection rod 2221 plus the first end cap 2222, and the first connection rod 2221 and the rotor 21 are fixed by using a threaded connection, so that on the basis of meeting the insulation requirement, the first connection element 222 can also ensure that the sealing cover 221 and the rotor 21 are stably connected, and transmission of power between the output shaft 12 and the rotor 21 is facilitated.

In some optional embodiments, in the transmission system 1 provided in the embodiments of the present application, the packaging assembly 22 further includes a protective gasket 225, and the protective gasket 225 is clamped between the inner insulating portion 2242 and the rotor 21.

Alternatively, the protective washer 225 may be annular in shape, and the protective washer 225 may be provided with a through hole, and the first rod of the first connector 222 can pass through the protective washer 225 to be connected to the rotor 21.

Alternatively, the protective pad 225 may be made of metal.

According to the transmission system 1 provided by the embodiment of the application, the protective gasket 225 is arranged, so that the rotor 21 can be protected, and positioning can be provided for installation of the components such as the cover 221. Simultaneously, the setting of protection gasket 225 can also protect interior insulating part 2242 from bearing mechanical injury, guarantees the insulating properties of interior insulating part 2242, and then reduces the risk that bearing 13 received shaft voltage.

Alternatively, the rotor 21 is provided with a positioning groove on an end surface in the axial direction X, and the protective gasket 225 may be at least partially located in the positioning groove.

Through setting up the constant head tank, can do benefit to the location of protective gasket 225 on rotor 21 when being connected with rotor 21, do benefit to protective gasket 225's installation.

In some alternative embodiments, protective gasket 225 includes a body ring 2251 and a positioning portion 2252 coupled to body ring 2251, body ring 2251 being sandwiched between inner insulation 2242 and rotor 21, positioning portion 2252 being inserted into rotor 21.

Alternatively, the main body ring 2251 and the positioning portions 2252 may be distributed in succession in the axial direction X of the output shaft 12.

Alternatively, positioning part 2252 may be an annular structure and disposed coaxially with body ring 2251.

Alternatively, the radial dimension of positioning portion 2252 is smaller than the radial dimension of main body ring 2251, and main body ring 2251 is provided at one end of positioning portion 2252 in the axial direction X and extends in the radial direction Y of output shaft 12 in a direction away from positioning portion 2252.

The transmission system 1 that this application embodiment provided, through make protection gasket 225 include main part ring 2251 and the location portion 2252 of being connected with main part ring 2251, can utilize main part ring 2251 to protect interior insulation 2242, simultaneously, the setting of location portion 2252 does benefit to the location of being connected between protection gasket 225 and the rotor 21, improves assembly precision and assembly efficiency.

In some optional embodiments, one end of the insulating sleeve 2241 abuts against the rotor 21, and the inner insulating part 2242 and the protection gasket 225 are sleeved on the periphery of the insulating sleeve 2241.

The transmission system 1 that this application embodiment provided, through making the one end butt of insulating sleeve 2241 at rotor 21, and make interior insulation part 2242 and protective pad 225 all cup joint in insulating sleeve 2241's periphery, can enough guarantee the insulating setting between protective pad 225 and the first connecting piece 222, and simultaneously, can carry out spacingly to insulating sleeve 2241 through rotor 21, avoid insulating sleeve 2241 to take place the drunkenness on the axial X of output shaft 12, guarantee the insulating setting requirement between first connecting piece 222 and the closing cap 221.

In some optional embodiments, the enclosure assembly 22 further includes a force equalizing ring 226, the force equalizing ring 226 being sandwiched between the outer insulating portion 2243 and the first end cap 2222.

Alternatively, the force-equalizing ring 226 may be provided with a through hole, and the first connector bar 2221 of the first connector 222 may pass through the force-equalizing ring 226.

The force equalizing ring 226 can alternatively be a rigid member, optionally a metal annular structure,

since the outer insulating part 2243 is made of an insulating material, wear resistance and load bearing capacity are relatively weak. By arranging the force equalizing ring 226 and clamping the force equalizing ring between the outer insulating part 2243 and the first end cap 2222, the axial acting force of the first end cap 2222 can be uniformly distributed on the outer insulating part 2243 through the force equalizing ring 226, so that the pressure borne by the outer insulating part 2243 in unit area is reduced. Avoid outer insulating part 2243 because of the too big wearing and tearing that leads to of local pressure, guarantee insulating effect, and then guarantee bearing 13's security performance.

In some optional embodiments, the package assembly 22 may further include a spacer 227, the spacer 227 being sandwiched between the first end cap 2222 and the force equalizing ring 226. By providing the spacer 227, a preload applied to the sealing cover 221 and the rotor 21 by the first end cap 2222 in the axial direction X of the output shaft 12 can be ensured, and a kinetic energy can be transmitted from the output shaft 12 to the rotor 21 through the sealing cover 221.

In some optional embodiments, the inner insulating portion 2242 is annular and is connected to the cover 221 and the rotor 21 by bonding, and the inner insulating portion 2242 includes more than two arc-shaped insulating segments distributed along the circumferential direction of the output shaft 12, and two adjacent insulating segments are spliced or spaced from each other.

Alternatively, the inner insulating portion 2242 may be provided coaxially with the output shaft 12.

Alternatively, more than two insulation segments may be circumferentially spaced apart. Alternatively, the spacing between two adjacent insulation segments may be equal.

Alternatively, when a protective gasket 225 is included, the inner insulating portion 2242 may be bonded to the protective gasket 225, and indirectly coupled to the rotor 21 via the protective gasket 225.

The transmission system 1 that this application embodiment provided, through making interior insulating part 2242 be cyclic annular and with closing cap 221 and rotor 21 adhesive connection, can guarantee the joint strength between interior insulating part 2242 and closing cap 221 and the rotor 21, do benefit to the installation of interior insulating part 2242. Simultaneously, set up interior insulating part 2242 into two above insulating sections, do benefit to the processing of interior insulating part 2242, can improve the connection degree of difficulty between interior insulating part 2242 and closing cap 221 and the rotor 21 simultaneously.

In some optional embodiments, the packaging assembly 22 further includes a second connector 223, and the second connector 223 is plugged and connected to the cover 221 and the output shaft 12.

Alternatively, the second connecting member 223 may be a rigid connecting member such as a bolt, and the cover 221 may be detachably connected to the output shaft 12 through the second connecting member 223.

Alternatively, the second connecting member 223 may be a connecting member such as a bolt made of metal, which has high strength and is easy to purchase.

The transmission system 1 provided by the embodiment of the application can ensure the connection strength between the cover 221 and the output shaft 12 by arranging the second connecting piece 223. The transmission of the kinetic energy of the output shaft 12 to the rotor 21 is facilitated, and the power generation requirement of the generator 20 is ensured.

With continued reference to fig. 2 to 5, in some optional embodiments, the gear box 10 further includes a cover 14, the cover 14 is disposed at one end of the box 11 in the axial direction X and clamped between the box 11 and the cover 221, wherein one of the cover 14 and the packing component 22 is provided with a protrusion 2211 and the other is provided with a groove 141, and the protrusion 2211 extends into the groove 141 and is in movable sealing fit with the groove 141.

Alternatively, a plurality of protrusions 2211 may be provided on the cover 221, and a plurality of grooves 141 may be provided on the lid 14, the shape of the plurality of grooves 141 matches the shape of the plurality of protrusions 2211, and the protrusions 2211 extend into the grooves 141 and are in dynamic sealing engagement with the grooves 141, so as to form a labyrinth seal between the lid 14 and the cover 221, thereby ensuring the sealing effect.

When the generator 20 is operated, the bearing 13 is installed in the gear box 10 to support the output shaft 12 to rotate. The lubricating oil overflows from the bearing 13 and, after passing through the internal seal structure, still leaks to the outside of the case cover 14. The transmission system 1 provided by the embodiment of the application can directly set one of the groove 141 and the protrusion 2211 on the cover 221 and set the other one of the groove 141 and the protrusion 2211 on the case cover 14, and can directly seal and match with the case cover 14 through the cover 221, thereby ensuring the sealing requirement between the two, avoiding the lubricating oil from being exposed, simultaneously avoiding additionally setting an independent sealing piece, being beneficial to simplifying the structure of the transmission system 1, and saving the processing cost and the installation cost.

Optionally, in the transmission system 1 provided in the embodiment of the present application, the inner insulating portion 2242 may be made of epoxy resin, glass fiber cloth laminated board, rubber, or other materials, and mainly functions to isolate the cover 221 and the rotor 21, prevent the current from conducting between the two, and at the same time, form a friction pair with the protective gasket 225 and the cover 221, and transmit the torque from the output shaft 12. The cover 221 may be a metal-machined part, which is a core part for transmitting torque as a base of the package 22.

Alternatively, the insulating sleeve 2241 may be a thin-walled cylinder structure made of epoxy resin fiberglass cloth, rubber or other materials, and mainly functions to isolate the first connecting element 222 and prevent the first connecting element 222 from contacting with metal parts to generate electrical conduction. The outer insulating portion 2243 is an annular thin plate structure, is made of epoxy resin fiberglass cloth laminated board, rubber or other materials, and has a main function of isolating the cover 221 to prevent direct contact with the first connecting member 222 or the gasket, thereby forming a circuit block. Meanwhile, a friction pair is formed among the outer insulating part 2243, the force equalizing ring 226 and the cover 221, and the fastening torque formed by the first connector 222 is transmitted.

In the transmission system 1 according to the embodiment of the present application, when the packaging assembly 22 is installed, first, the cover 14 of the gearbox 10 is fastened to the case 11 by bolts. Then, the inner insulating part 2242 is aligned with the hole position of the sealing cover 221, and is firmly bonded through epoxy resin glue. And continuously aligning the hole positions of the protective gasket 225 and the cover 221, and firmly bonding by using epoxy resin glue. Inserting the insulating sleeve 2241, aligning the outer insulating part 2243, the force equalizing ring 226 in turn, inserting the first connector 222 and the spacer, securely connecting the cover 221 assembly with the rotor 21. Finally, the mounting hole positions of the cover 221 and the output shaft 12 are aligned and tightly connected through the second connecting piece 223.

The transmission system 1 provided by the embodiment of the application provides a structure which can simultaneously meet the requirements of blocking shaft current, transmitting torque and sealing a bearing 13. From the part quantity, the part quantity is few, and the structural style is brief for assembly process is simple, can reduce the assembly degree of difficulty, shortens manufacturing cycle, has reduced assembly cost. In terms of processing and manufacturing of parts, the related parts are made of conventional materials and processes, and the materials belong to pipes and plates, so that the material cost and the processing cost are reduced. From carrying the efficiency and looking at, the vice structure of friction is carried the performance higher, and the atress of part is more even, very big increase product life to reduce the stress variation amplitude, reduced later stage fortune dimension cost. The structure has more cost advantages by combining the points.

The wind generating set provided by the embodiment of the application comprises the transmission system 1 provided by each embodiment, the conversion requirement from wind energy to electric energy can be met, meanwhile, the bearing 13 can be prevented from being broken down and damaged by shaft voltage, and the power generation benefit of the wind generating set is improved. It will be appreciated that the use of the drive train 1 in a wind power plant is an alternative embodiment and may be used in other energy to electrical energy conversion applications, such as converting tidal energy and the like.

While the application has been described with reference to a preferred embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the application. In particular, the technical features mentioned in the embodiments can be combined in any way as long as there is no structural conflict. The present application is not intended to be limited to the particular embodiments disclosed herein but is to cover all embodiments that may fall within the scope of the appended claims.

Claims (10)

1. A transmission system (1), characterized by comprising:

the gearbox (10) comprises a box body (11), an output shaft (12) and a bearing (13), wherein the output shaft (12) is rotationally connected with the box body (11) through the bearing (13);

generator (20), including rotor (21), stator and encapsulation subassembly (22), the stator with box (11) are connected, rotor (21) are passed through encapsulation subassembly (22) with output shaft (12) are connected, encapsulation subassembly (22) include closing cap (221), first connecting piece (222) and insulating part (224), insulating part (224) include interior insulation portion (2242), insulating cover (2241) and external insulation portion (2243), first connecting piece (222) plug-in connection in closing cap (221) and rotor (21), first connecting piece (222) pass through insulating cover (2241) and external insulation portion (2243) with closing cap (221) is insulating to be set up, rotor (21) and closing cap (221) passes through interior insulation portion (2242) is insulating to be set up.

2. The transmission system (1) according to claim 1, wherein the first connecting member (222) comprises a first connecting rod (2221) and a first end cap (2222), the first connecting rod (2221) is inserted into the cover (221) and the rotor (21) and is in threaded connection with the rotor (21), the first end cap (2222) is disposed at an end of the first connecting rod (2221) departing from the rotor (21), the insulating sleeve (2241) is sleeved on the first connecting rod (2221), the inner insulating portion (2242) is clamped between the cover (221) and the rotor (21), and the outer insulating portion (2243) is clamped between the first end cap (2222) and the cover (221).

3. The transmission system (1) according to claim 2, characterized in that said packaging assembly (22) further comprises a protection gasket (225), said protection gasket (225) being clamped between said inner insulating portion (2242) and said rotor (21).

4. The transmission system (1) according to claim 3, wherein the protective gasket (225) comprises a main body ring (2251) and a positioning portion (2252) connected to the main body ring (2251), the main body ring (2251) being clamped between the inner insulation portion (2242) and the rotor (21), the positioning portion (2252) being plugged into the rotor (21).

5. The transmission system (1) according to claim 3, characterized in that one end of the insulating sleeve (2241) abuts against the rotor (21), and the inner insulating part (2242) and the protective washer (225) are sleeved on the periphery of the insulating sleeve (2241).

6. The transmission system (1) according to claim 2, wherein said packaging assembly (22) further comprises a force-equalizing ring (226), said force-equalizing ring (226) being clamped between said outer insulating portion (2243) and said first end cap (2222).

7. A transmission system (1) according to claim 1, wherein said inner insulating portion (2242) is annular and is adhesively connected to said cover (221) and said rotor (21), and said inner insulating portion (2242) includes two or more arc-shaped insulating segments distributed along the circumferential direction of said output shaft (12), and adjacent two of said insulating segments are spliced or spaced from each other.

8. Transmission system (1) according to any one of claims 1 to 7, characterized in that said packaging (22) further comprises a second connector (223), said second connector (223) being plug-connected to said cover (221) and to said output shaft (12).

9. The transmission system (1) according to any one of claims 1 to 7, wherein the gearbox (10) further comprises a cover (14), the cover (14) is disposed at one end of the housing (11) and clamped between the housing (11) and the cover (221), wherein one of the cover (14) and the cover (221) is provided with a protrusion (2211) and the other is provided with a groove (141), and the protrusion (2211) extends into the groove (141) and is in dynamic sealing fit with the groove (141).

10. A wind power plant, characterized in that it comprises a transmission system (1) according to any one of claims 1 to 9.

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