CN117759702A - Wind-powered electricity generation gear box planet wheel slide bearing structure - Google Patents

Abstract

The invention relates to the technical field of wind power gearboxes, and particularly discloses a wind power gearbox planetary gear sliding bearing structure, which comprises a planetary carrier and a planetary pin fixedly connected to the planetary carrier, wherein a planetary gear is rotationally connected to the planetary pin; two L-shaped sliding bearings are arranged between the planetary pin shaft and the planetary wheel, the two sliding bearings are symmetrically distributed at two ends of the planetary wheel, the horizontal part of each sliding bearing is fixedly connected with the planetary wheel to form a planetary wheel-sliding bearing assembly, and the vertical part of each sliding bearing is propped against the end part of the planetary wheel; the sliding bearing is rotationally connected to the planetary pin shaft, the inner circumferential surface of the sliding bearing is rotationally contacted with the planetary pin shaft to form an annular working surface, and the end surface of the sliding bearing, which is far away from the planet wheel, is rotationally contacted with the planet carrier to form a vertical working surface. By adopting the technical scheme provided by the invention, the technical problems that the loaded area of the radial bearing is easy to generate directional deformation and is worn quickly in the prior art, so that the service life of the radial bearing is seriously influenced can be solved.

Description

Wind-powered electricity generation gear box planet wheel slide bearing structure

Technical Field

The invention relates to the technical field of wind power gearboxes, in particular to a wind power gearbox planet wheel sliding bearing structure.

Background

The planetary gear structure is a common structure of a wind power gear box, a cylindrical roller bearing is adopted in the traditional planetary gear installation process, and the planetary gear is installed on a planetary pin shaft of a planetary carrier through the cylindrical roller bearing, so that torque transmission is realized. The structure has the defects that the inner ring and the outer ring of the cylindrical roller bearing are easy to slip, and particularly when the cylindrical roller bearing is applied to the installation of the planet gears of the large megawatt wind power gear box, the inner ring and the outer ring of the cylindrical roller bearing are easier to slip, the working reliability of the planet gear bearing is difficult to ensure, and the service life of the planet gear bearing is seriously influenced.

Therefore, aiming at the installation of the planet gears of the wind power gear box, the inventor starts to adopt the sliding bearing to replace the cylindrical roller bearing so as to improve the working reliability of the planet gear bearing and prolong the service life of the planet gear bearing. As shown in fig. 1, the sliding bearing comprises a radial bearing 4 and two thrust bearings 2, the radial bearing 4 is fixedly connected to a planetary pin 5 in an interference manner, a planetary wheel 3 is rotationally connected with the radial bearing 4, and the inner circumferential surface of the planetary wheel 3 is in sliding fit with the outer circumferential surface of the radial bearing 4; two thrust bearings 2 are distributed at two ends of the planet wheel 3, and the thrust bearings 2 are fixedly connected to the planet carrier 1 at corresponding positions through bolts.

However, the inventors have found that the above technique has the following problems:

1. because the radial bearing is fixed on the planetary pin shaft, the outer circumferential surface of the radial bearing, which is in sliding fit with the planetary gear, is a working surface of the radial bearing, and the working surface of the radial bearing is fixed in a region bearing the meshing force load of the planetary gear during the working, the loaded region of the working surface of the radial bearing is easy to deform directionally and is worn quickly, so that the service life of the radial bearing is seriously influenced.

2. The radial dimension of the thrust bearing is relatively high, and the radial dimension of the thrust bearing is simultaneously contacted with two planes of the end part of the radial bearing and the end part of the planet wheel in the working process, because the planet wheel is formed by processing hard steel materials, and the radial bearing and the thrust bearing are formed by processing soft copper alloy materials, the end part of the thrust bearing can generate heterogeneous abnormal abrasion, and the thrust bearing easily forms a mixed friction area at the junction of the planet wheel and the radial bearing, so that the temperature rise of the bearing is relatively high, and the service life of the thrust bearing is influenced.

3. The bearing arrangement in the prior art consists of one radial bearing and two thrust bearings, the number of the bearings is large, and the installation and the maintenance are inconvenient.

Disclosure of Invention

The invention aims to provide a wind power gear box planet wheel sliding bearing structure, which solves the technical problems that in the prior art, the loaded area of a radial bearing is easy to generate directional deformation and is rapid in abrasion, so that the service life of the radial bearing is seriously influenced.

In order to achieve the above purpose, the invention adopts the following technical scheme:

the planet wheel sliding bearing structure of the wind power gear box comprises a planet carrier and a planet pin fixedly connected to the planet carrier, wherein a planet wheel is rotationally connected to the planet pin; two L-shaped sliding bearings are arranged between the planetary pin shaft and the planetary gear, the two sliding bearings are symmetrically distributed at two ends of the planetary gear, the horizontal part of each sliding bearing is fixedly connected with the inner circumferential surface of the planetary gear to form a planetary gear-sliding bearing assembly, and the vertical part of each sliding bearing is propped against the end part of the planetary gear; the sliding bearing is rotationally connected to the planetary pin shaft, the inner circumferential surface of the sliding bearing is rotationally contacted with the planetary pin shaft to form an annular working surface, and the end surface of the sliding bearing, which is far away from the planet wheel, is rotationally contacted with the planet carrier to form a vertical working surface.

The principle and beneficial effect of this scheme are:

1. in this scheme slide bearing fixed connection is on the planet wheel, during operation slide bearing follows the planet wheel and rotates, slide bearing's interior circumference and planetary pin rotation contact form annular working face, slide bearing's annular working face is between it and planetary pin promptly, and slide bearing during operation bears the regional synchronous change along with the rotation of planet wheel meshing force load, so, can guarantee slide bearing annular working face and planetary pin's even running-in, avoid slide bearing to take place directional deformation because of loaded region is fixed, can effectively prolong slide bearing's life simultaneously.

2. In this scheme slide bearing keeps away from the terminal surface of planet wheel and planet carrier rotary contact and forms vertical working face, then slide bearing's terminal surface only rubs with the planet carrier in the course of the work, and the tip of planet carrier and slide bearing contact is overall structure, the material at each position is the same, can effectively avoid slide bearing's terminal surface to rub the inhomogeneous abnormal wear that leads to because of each position with different materials, avoid slide bearing's terminal surface to rub simultaneously and form the mixed friction region with a plurality of objects to lead to slide bearing temperature rise higher, consequently, slide bearing's life can be further prolonged to this scheme.

3. According to the scheme, two L-shaped sliding bearings are adopted to replace a planetary gear sliding bearing structure with one radial bearing and two thrust bearings in the prior art, so that the number of the sliding bearings in the planetary gear sliding bearing structure is reduced, the equipment cost is reduced, and the installation convenience is improved; and the horizontal parts of the two L-shaped sliding bearings are fixedly connected with the inner circumferential surface of the planet wheel to form a planet wheel-sliding bearing assembly, so that the planet wheel-sliding bearing assembly can be installed as a whole during field installation, and the installation convenience of the wind power gear box can be further improved.

4. In this scheme, the slide bearing symmetry of two L shapes sets up the both ends at planet wheel for the both ends of planet wheel all obtain slide bearing's equal support, can effectively avoid planet wheel and slide bearing to produce stress concentration phenomenon, be favorable to improving the operating stability and the life of planet wheel-slide bearing subassembly.

5. In this scheme, slide bearing's vertical portion offsets with the tip of planet wheel, then when being connected to the planet wheel with slide bearing on with formation planet wheel-slide bearing subassembly, can fix a position slide bearing through slide bearing's vertical portion, both guaranteed slide bearing and the connection accuracy of planet wheel, can effectively improve slide bearing and the connection convenience of planet wheel again.

Preferably, as an improvement, the horizontal part of the sliding bearing is in interference connection with the planet wheel in a fixed connection mode.

The beneficial effects are that: according to the scheme, the fixed connection of the horizontal part of the sliding bearing and the planet wheel is realized in an interference connection mode, an additional fixing structure is not required to be arranged, the structure of the planet wheel-sliding bearing assembly is facilitated to be simplified, the weight of the planet wheel-sliding bearing assembly is reduced, and the manufacturing and the installation are facilitated.

Preferably, as an improvement, a positioning connector is arranged between the vertical part of the sliding bearing and the end part of the planet wheel, and the positioning connector is used for positioning and connecting the sliding bearing to the planet wheel and limiting the relative rotation of the sliding bearing and the planet wheel.

The beneficial effects are that: according to the scheme, on the basis that the horizontal part of the sliding bearing is fixedly connected with the planet wheel in an interference manner, the positioning connecting piece is additionally arranged between the vertical part of the sliding bearing and the end part of the planet wheel, so that the sliding bearing and the planet wheel are further limited to rotate relatively, if the sliding bearing and/or the planet wheel are deformed in the long-time use process, the positioning connecting piece can also ensure that the sliding bearing rotates along with the planet wheel, so that the loaded area of the sliding bearing is synchronously changed along with the rotation of the planet wheel, the situation that the sliding bearing cannot rotate along with the planet wheel due to interference connection failure is avoided, and the loaded area of the sliding bearing is fixed to cause directional deformation and serious abrasion is avoided.

Preferably, as an improvement, the positioning connector comprises a positioning pin, positioning pin holes are formed in the vertical portion of the sliding bearing and the corresponding position of the end part of the planet wheel, the positioning pin holes are matched with the positioning pin in size, and the positioning pin is inserted into the positioning pin holes.

The beneficial effects are that: according to the scheme, the locating pin and the locating pin hole are used as locating connecting pieces, the locating pin hole matched with the locating pin in size is formed in the vertical portion of the sliding bearing and the corresponding position of the end portion of the planet wheel, and the locating pin is only required to be inserted into the locating pin hole during installation, so that locating connection of the sliding axis and the planet wheel can be achieved, operation is convenient, and the installation efficiency of the planet wheel sliding bearing structure is improved.

Preferably, as a modification, there is a gap greater than zero between the two sliding bearings.

The beneficial effects are that: according to the scheme, the gap larger than zero is arranged between the two sliding bearings, so that a space can be reserved for deformation and thermal expansion of the sliding bearings in the long-time use process, the situation that the two sliding bearings are mutually extruded is avoided, reliable work of the two sliding bearings is guaranteed, and the service life of the planetary wheel-sliding bearing assembly is guaranteed.

Preferably, as a modification, the gap between the two sliding bearings is d, and d is 2mm < 10mm.

The beneficial effects are that: according to the scheme, the gap between the two sliding bearings is set to be more than or equal to 2mm and less than or equal to 10mm, the expected bearing capacity of the two sliding bearings can be met, and meanwhile, the space is reserved for deformation and thermal expansion of the two sliding bearings which inevitably occur in the long-time use process, the situation that the two sliding bearings are mutually extruded is avoided, the reliable work of the sliding bearings is guaranteed, and the service life of the planetary wheel-sliding bearing assembly is guaranteed. If the gap between the two sliding bearings is too small and smaller than 2mm, the reserved space between the two sliding bearings is too small, and once any one of the two sliding bearings is deformed and thermally expanded in the long-time use process, the two sliding bearings are easy to squeeze each other, so that the reliable operation of the sliding bearings cannot be ensured, and the service life of the planetary wheel-sliding bearing assembly is shortened. If the gap between the two sliding bearings is too large and is larger than 10mm, the two sliding bearings can be effectively prevented from being mutually extruded due to deformation and thermal expansion in long-time use, but the bearing capacity of the sliding bearings can be reduced, the working reliability of the planet wheel-sliding bearing assembly can not be guaranteed, and the use safety is not guaranteed.

Preferably, as an improvement, the planetary pin shaft lubricating device further comprises a lubricating oil path, wherein the lubricating oil path comprises a planetary carrier oil path arranged in a planetary carrier and a planetary pin shaft oil path arranged in a planetary pin shaft, and the planetary carrier oil path is communicated with the planetary pin shaft oil path; the outer circumferential surface of the planetary pin shaft is provided with a plurality of oil inlet holes which are communicated with the planetary pin shaft oil duct.

The beneficial effects are that: according to the scheme, a planet carrier oil duct and a planet pin shaft oil duct are respectively formed in a planet carrier and a planet pin shaft, lubricating oil added from the outside is led to the planet pin shaft oil duct through the planet carrier oil duct, and then the lubricating oil in the planet pin shaft oil duct is distributed to the outer circumferential surface of the planet pin shaft through a plurality of oil inlet holes formed in the outer circumferential surface of the planet pin shaft, and the outer circumferential surface of the planet pin shaft is in contact with an annular working surface of a sliding bearing, so that effective oil supply of the annular working surface of the sliding bearing can be realized; the lubricating oil contacted with the annular working surface of the sliding bearing is partially drained to the gap between the end surface of the sliding bearing and the planet carrier along the gap between the horizontal part of the sliding bearing and the planet pin shaft, and is contacted with the vertical working surface of the sliding bearing, so that the oil supply of the vertical working surface of the sliding bearing is realized. The scheme has simple structure, can effectively realize the oil supply of the annular working surface and the vertical working surface of the sliding bearing, and ensures the working reliability of the sliding bearing, thereby ensuring the working reliability of the planet wheel-sliding bearing assembly, reducing the abrasion between the end surface of the sliding bearing and the planet carrier, and being beneficial to prolonging the service life of the sliding bearing.

Preferably, as an improvement, the oil inlet holes are uniformly distributed at corresponding positions of the two sliding bearings along the axial direction.

The beneficial effects are that: according to the scheme, the oil inlet holes are uniformly distributed at the corresponding positions of the two sliding bearings, so that lubricating oil flowing from the oil inlet holes to the outer circular surface of the planetary pin shaft can uniformly contact with the annular working surfaces of the two sliding shafts, uniform lubrication of the annular working surfaces of the two sliding bearings is realized, the working reliability of the two sliding bearings is further ensured, and the working reliability of the planetary wheel-sliding bearing assembly is further ensured.

Preferably, as an improvement, the lubricating oil way further comprises an oil discharging channel arranged in the planetary pin shaft, and the oil discharging channel penetrates through two ends of the planetary pin shaft; an oil drain hole is formed in the outer circumferential surface of the planetary pin shaft, one end of the oil drain hole is communicated with a gap between the two sliding bearings, and the other end of the oil drain hole is communicated with an oil outlet channel.

The beneficial effects are that: the excessive lubrication of the two working surfaces of the sliding bearing may cause the following hazards: 1) Friction increase: excessive lubricating oil can cause the working surface of the sliding bearing to form an excessively thick lubricating film, so that friction on the surface of the sliding bearing is increased, energy loss and heating of the sliding bearing can be caused, and normal operation of the sliding bearing is affected; 2) Temperature rise: the increased friction of the sliding bearing surface can generate excessive frictional heat, which can raise the temperature of the sliding bearing beyond its normal operating temperature range, thereby affecting the life and performance of the sliding bearing; 3) Pollution corrosion: the excessive accumulation of lubricant on the working surface of the sliding bearing increases the likelihood of adsorbing and attracting external contaminants that may cause particle accumulation and corrosion of the working surface of the sliding bearing, further exacerbating wear and damage to the working surface of the sliding bearing.

According to the scheme, the oil discharging channel and the oil discharging hole are formed in the planet pin shaft, the oil discharging hole is communicated with a gap between the oil discharging channel and the two sliding bearings, excessive lubricating oil can timely flow into the oil discharging hole from the gap between the two sliding bearings, then enters the oil discharging channel through the oil discharging hole, and finally the whole wind power gear box is discharged from the two ends of the planet pin shaft.

Preferably, as an improvement, the fixed connection mode of the planetary pin shaft and the planet carrier is interference connection, and an end face key for further limiting the relative rotation of the planetary pin shaft and the planet carrier is arranged between the planetary pin shaft and the planet carrier.

The beneficial effects are that: this scheme fixes through interference connection's mode between with planet round pin axle and the planet carrier, can reduce extra connection structure, simplifies the structure of whole wind-powered electricity generation gear box to alleviate the weight of whole wind-powered electricity generation gear box, not only conveniently add one, be favorable to improving the convenience of installation moreover. In addition, compare in the mode that only relies on interference connection to fix planet round pin axle and planet carrier, this scheme increases the terminal surface key between planet round pin axle and planet carrier and connects, and fixed effect is better, even if the planet round pin axle and/or planet carrier have taken place to warp in long-time use, the relative position of planet round pin axle and planet carrier is fixed to the terminal surface key also can be guaranteed to guarantee the long-time operational reliability of whole wind-powered electricity generation gear box.

Drawings

Fig. 1 is a schematic diagram of a prior art structure.

Fig. 2 is a schematic structural diagram of embodiment 1 of the present invention.

Fig. 3 is a schematic view of the structure of two sliding bearings in fig. 2.

Fig. 4 is a schematic diagram of the structure at a in fig. 2.

Fig. 5 is a schematic structural diagram of the same part as fig. 4 in embodiment 2 of the present invention.

Detailed Description

The following is a further detailed description of the embodiments:

reference numerals in the drawings of the specification include: the planet carrier 1, the thrust bearing 2, the planet wheel 3, the radial bearing 4, the planet pin 5, the planet carrier 10, the planet pin 20, the planet wheel 30, the sliding bearing 40, the annular working surface 41, the vertical working surface 42, the locating pin 50, the lubricating oil path 60, the planet carrier oil path 61, the planet pin oil path 62, the oil inlet hole 63, the oil discharge channel 64, the oil discharge hole 65 and the gap d between the two sliding bearings.

Example 1

A wind power gear box planet wheel sliding bearing structure is shown in fig. 2, and comprises a planet carrier 10 and a planet pin shaft 20 coaxially and fixedly connected to the planet carrier 10, wherein a planet wheel 30 is coaxially and rotatably connected to the outer circumferential surface of the planet pin shaft 20. In this embodiment, the fixed connection manner of the planet pin 20 and the planet carrier 10 is interference connection, and an end key for further limiting the relative rotation of the planet pin 20 and the planet carrier 10 is provided between them. The end face key between the planetary pin 20 and the carrier 10 is any one of the end face keys in the prior art, as long as the relative rotation of the planetary pin 20 and the carrier 10 can be restricted, and the embodiment is not particularly limited.

Specifically, two L-shaped sliding bearings 40 are arranged between the planetary pin shaft 20 and the planetary gear 30, the two sliding bearings 40 are symmetrically distributed at two ends of the planetary gear 30, the horizontal part of the sliding bearing 40 is fixedly connected with the inner circumferential surface of the planetary gear 30 to form a planetary gear 30-sliding bearing 40 assembly, and the vertical part of the sliding bearing 40 is propped against the end part of the planetary gear 30; the sliding bearing 40 is rotatably connected to the outer circumferential surface of the planetary pin 20, and the inner circumferential surface of the sliding bearing 40 is in rotary contact with the planetary pin 20 to form an annular working surface 41 as shown in fig. 3, and the end surface of the sliding bearing 40 away from the planetary gear 30 is in rotary contact with the planet carrier 10 to form a vertical working surface 42 as shown in fig. 3.

In this embodiment, the end of the planet carrier 10 near the sliding bearing 40 is integrally formed with an annular boss, the diameter of the inner circumferential surface of the annular boss is equal to that of the inner circumferential surface of the planet carrier 10, the diameter of the outer circumferential surface of the annular boss is smaller than that of the outer circumferential surface of the planet carrier 10, and the end surface of the sliding bearing 40 far from the planet wheel 30 is in rotary contact with the annular boss, so that the contact area between the vertical working surface 42 of the sliding bearing 40 and the planet carrier 10 can be reduced, and the abrasion of the end of the sliding bearing 40 is reduced.

In this embodiment, the horizontal portion of the sliding bearing 40 is in interference connection with the planetary gear 30 in a fixed connection manner; a positioning connection is provided between the vertical portion of the slide bearing 40 and the end of the planet wheel 30 for positioning the slide bearing 40 to the planet wheel 30, limiting the relative rotation of the slide bearing 40 and the planet wheel 30. Specifically, as shown in fig. 4, the positioning connector includes a positioning pin 50, a positioning pin hole (not shown in the drawing) is formed on one side of the vertical portion of the sliding bearing 40, which is close to the planet gear 30, and a positioning pin hole (not shown in the drawing) is also formed at the end portion of the planet gear 30, which corresponds to the positioning pin hole of the sliding bearing 40, and the positioning pin hole is matched with the positioning pin 50 in size, that is, the positioning pin 50 can be inserted into the positioning pin hole.

As shown in fig. 2 and 3, the two sliding bearings 40 have a gap therebetween greater than zero, the gap between the two sliding bearings is defined as d, and d is 2 mm.ltoreq.d.ltoreq.10 mm, and specifically, d may be 2mm, 4mm, 6mm, 8mm, 10mm, or the like.

The planet pin shaft oil passage 62 is arranged in the planet pin shaft 20, and the oil outlet end of the planet pin shaft oil passage 61 is communicated with the oil inlet end of the planet pin shaft oil passage 62. In this embodiment, the planet pin oil passage 62 is L-shaped, and a vertical portion of the planet pin oil passage 62 is disposed along the radial direction of the planet pin 20 and is communicated with the planet carrier oil passage 61, and a horizontal portion of the planet pin oil passage 62 is disposed along the axial direction of the planet pin 20. The outer circumferential surface of the planetary pin shaft 20 is provided with a plurality of oil inlet holes 63, the plurality of oil inlet holes 63 are communicated with the horizontal part of the planetary pin shaft oil duct 62, and the plurality of oil inlet holes 63 are uniformly distributed at corresponding positions of the two sliding bearings 40 along the axial direction of the planetary pin shaft 20.

The lubrication oil path 60 further includes an oil drain channel 64, the oil drain channel 64 is opened inside the planet pin 20, and the oil drain channel 64 penetrates through two ends of the planet pin 20 along the axis of the planet pin 20 and is communicated with a through hole at a corresponding position of the planet carrier 10, that is, the oil drain channel 64 penetrates to the outside of the planet carrier 10. An oil drain hole 65 is formed in the outer circumferential surface of the planetary pin shaft 20, the oil drain hole 65 is arranged along the radial direction of the planetary pin shaft 20, one end of the oil drain hole 65 is communicated with a gap between two sliding bearings, and the other end of the oil drain hole 65 is communicated with an oil outlet channel. In the present embodiment, the aperture of the oil discharge hole 65 is equal to the gap d between the two slide bearings. In order to improve the oil discharging efficiency, in other embodiments, a plurality of oil discharging holes 65 may be formed on the outer surface of the planetary pin 20, and the plurality of oil discharging holes 65 are uniformly distributed along the circumferential direction of the planetary pin 20.

The implementation process of the embodiment is as follows:

and (2) mounting: the horizontal part of the sliding bearings 40 is fixedly connected to the inner circumferential surface of the planet wheel 30 in an interference manner, so that the two sliding bearings 40 are symmetrically distributed along the oil drain hole 65, and the positioning pin 50 is matched with a positioning pin hole on the end surface of the planet wheel 30 and a positioning pin hole on the vertical part of the sliding bearing 40, so that the relative rotation limitation of the sliding bearings 40 and the planet wheel 30 is realized, and a planet wheel 30-sliding bearing 40 assembly is obtained; and then the sliding bearing 40 is rotationally sleeved on the outer circumferential surface of the planetary pin shaft 20, so that the assembly of the planetary wheel 30 and the sliding bearing 40 is mounted.

The method comprises the following steps: the planetary gears 30 rotate to drive the sliding bearings 40 to synchronously rotate, the inner circumferential surfaces of the sliding bearings 40 are in rotary contact with the planetary pin shafts 20 to form annular working surfaces 41, and the end surfaces of the sliding bearings 40, which are far away from the planetary gears 30, are in rotary contact with the planetary carriers 10 to form vertical working surfaces 42; the area of the sliding bearing 40 bearing the meshing force load of the planet wheel 30 changes synchronously along with the rotation of the planet wheel 30 during the operation, so that the uniform running-in of the annular working surface 41 of the sliding bearing 40 and the planet pin 20 can be ensured, the directional deformation of the sliding bearing 40 caused by the fixation of the loaded area is avoided, and the service life of the sliding bearing 40 can be effectively prolonged; the vertical working surface 42 of the sliding bearing 40 is only in contact with the planet carrier 10, so that uneven abnormal abrasion of the vertical working surface 42 of the sliding bearing 40 caused by friction between each part and different materials can be effectively avoided, and meanwhile, a mixed friction area is avoided, which is formed by friction between the vertical working surface 42 of the sliding bearing 40 and a plurality of objects, so that the temperature rise of the sliding bearing 40 is higher, and therefore, the service life of the sliding bearing 40 can be further prolonged.

Oil supply: the lubricating oil added from the outside is conveyed to a planet pin shaft oil duct 62 in the planet pin shaft 20 through a planet carrier oil duct 61 in the planet carrier 10 and conveyed to a gap between the planet pin shaft 20 and the sliding bearing 40 through a plurality of oil outlet holes, so that the oil supply of the annular working surface 41 of the sliding bearing 40 is realized; the lubricating oil then flows to the gap between the sliding bearing 40 and the planet carrier 10 along the gap between the sliding bearing 40 and the planet pin 20, so as to realize the oil supply of the vertical working surface 42 of the sliding bearing 40; the excessive lubrication oil is concentrated to the gap between the two sliding bearings and is discharged from the sliding bearings 40 through the oil discharge holes 65 and the oil discharge passages 64 in order.

Example 2

A wind power gear box planetary gear sliding bearing structure, as shown in fig. 5, is different from embodiment 1 in that: the end face of the planet wheel 30 is provided with a counter bore corresponding to the vertical part of the sliding bearing 40, the outer diameter of the counter bore is matched with the outer diameter of the vertical part of the sliding bearing 40, and when the planetary gear is installed, the vertical part of the sliding bearing 40 is embedded into the counter bore, so that the vertical part of the sliding bearing 40 and the counter bore of the end face of the planet wheel 30 can be increased to be matched and positioned on the basis that the corner of the sliding bearing 40 is matched and positioned with the inner circumferential surface and the end face of the planet wheel 30, and the positioning precision and efficiency of the sliding bearing 40 and the planet wheel 30 are improved.

The foregoing is merely exemplary of the present invention, and specific technical solutions and/or features that are well known in the art have not been described in detail herein. It should be noted that, for those skilled in the art, several variations and modifications can be made without departing from the technical solution of the present invention, and these should also be regarded as the protection scope of the present invention, which does not affect the effect of the implementation of the present invention and the practical applicability of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (10)

1. The planet wheel sliding bearing structure of the wind power gear box comprises a planet carrier and a planet pin fixedly connected to the planet carrier, wherein a planet wheel is rotationally connected to the planet pin; the method is characterized in that: two L-shaped sliding bearings are arranged between the planetary pin shaft and the planetary gear, the two sliding bearings are symmetrically distributed at two ends of the planetary gear, the horizontal part of each sliding bearing is fixedly connected with the inner circumferential surface of the planetary gear to form a planetary gear-sliding bearing assembly, and the vertical part of each sliding bearing is propped against the end part of the planetary gear; the sliding bearing is rotationally connected to the planetary pin shaft, the inner circumferential surface of the sliding bearing is rotationally contacted with the planetary pin shaft to form an annular working surface, and the end surface of the sliding bearing, which is far away from the planet wheel, is rotationally contacted with the planet carrier to form a vertical working surface.

2. A wind-powered gearbox planetary gear slide bearing structure as claimed in claim 1, wherein: the horizontal part of the sliding bearing is in interference connection with the planet wheel in a fixed connection mode.

3. A wind-powered gearbox planetary gear slide bearing structure according to claim 2, wherein: and a positioning connecting piece is arranged between the vertical part of the sliding bearing and the end part of the planet wheel and used for positioning and connecting the sliding bearing to the planet wheel and limiting the relative rotation of the sliding bearing and the planet wheel.

4. A wind-powered gearbox planetary gear slide bearing structure as claimed in claim 3, wherein: the positioning connecting piece comprises a positioning pin, positioning pin holes are formed in the vertical portion of the sliding bearing and the positions corresponding to the end portions of the planet gears, the positioning pin holes are matched with the positioning pin in size, and the positioning pin is inserted into the positioning pin holes.

5. A wind-powered gearbox planetary gear slide bearing structure as claimed in claim 1, wherein: there is a gap between the two sliding bearings greater than zero.

6. The wind power gear box planetary gear sliding bearing structure according to claim 5, wherein: the clearance between the two sliding bearings is d, and d is more than or equal to 2mm and less than or equal to 10mm.

7. The wind power gear box planetary gear sliding bearing structure according to claim 5, wherein: the planet pin shaft is provided with a planet carrier oil passage and a planet pin shaft oil passage, and the planet carrier oil passage is communicated with the planet pin shaft oil passage; the outer circumferential surface of the planetary pin shaft is provided with a plurality of oil inlet holes which are communicated with the planetary pin shaft oil duct.

8. The wind power gearbox planetary gear sliding bearing structure according to claim 7, wherein: the oil inlet holes are uniformly distributed at corresponding positions of the two sliding bearings along the axial direction.

9. The wind power gear box planetary gear sliding bearing structure according to claim 8, wherein: the lubricating oil way further comprises an oil discharging channel which is arranged in the planetary pin shaft and penetrates through two ends of the planetary pin shaft; an oil drain hole is formed in the outer circumferential surface of the planetary pin shaft, one end of the oil drain hole is communicated with a gap between the two sliding bearings, and the other end of the oil drain hole is communicated with an oil outlet channel.

10. A wind power gearbox planetary gear slide bearing structure according to any of claims 1-9, characterised in that: the fixed connection mode of the planetary pin shaft and the planetary carrier is interference connection, and an end face key for further limiting the relative rotation of the planetary pin shaft and the planetary carrier is arranged between the planetary pin shaft and the planetary carrier.