CN210949825U

CN210949825U - Planet structure and wind power gear box

Info

Publication number: CN210949825U
Application number: CN201921821750.XU
Authority: CN
Inventors: 高卫明; 肖春云; 鲁寅声
Original assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Current assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Priority date: 2019-10-28
Filing date: 2019-10-28
Publication date: 2020-07-07
Anticipated expiration: 2029-10-28

Abstract

The utility model discloses a planet structure and wind-powered electricity generation gear box belongs to and is used for wind-powered electricity generation gear box technical field. The planetary structure includes: the planet carrier comprises two webs which are oppositely arranged; the pin shaft is arranged on the planet carrier, and two ends of the pin shaft are respectively connected to the two webs; the bearing without the inner ring and the outer ring is sleeved outside the pin shaft and comprises a plurality of cylindrical rollers and a retainer for mounting the cylindrical rollers, the cylindrical rollers are arranged around the peripheral surface of the pin shaft, and two ends of each cylindrical roller are connected to the retainer; the planet gear is sleeved outside the bearing without the inner ring and the outer ring. The utility model discloses a no inner and outer lane bearing, the direct and round pin axle contact of the inside wall of the cylindrical roller on the bearing, the direct and planet wheel contact of lateral wall avoids skidding because of the bearing inner and outer lane and leads to the shorter problem of bearing life.

Description

Planet structure and wind power gear box

Technical Field

The utility model relates to a wind-powered electricity generation gear box technical field especially relates to a planet structure and wind-powered electricity generation gear box.

Background

Wind power is used as a renewable energy source, has strong advantages for power generation, and has the advantages of low construction cost, small occupied area, convenience in maintenance and the like compared with thermal power generation, solar energy, hydraulic power generation and other energy sources.

The planet-level gear structure is a common structure of a wind power gear box, a cylindrical roller bearing is adopted when a traditional planet wheel is installed, and the planet wheel is installed on a pin shaft on a planet carrier through the cylindrical roller bearing, so that torque is transmitted. The structure has the defect that the inner ring and the outer ring of the cylindrical roller bearing are easy to slip, and the service life of the bearing is seriously influenced.

Accordingly, the prior art is yet to be improved and developed.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a planet structure and wind-powered electricity generation gear box to install the planet wheel on selling the axle through cylindrical roller bearing in solving prior art's planet structure, cylindrical roller's inner circle and outer lane are skidded easily, influence bearing life's problem.

To achieve the purpose, the utility model adopts the following technical proposal:

a planetary structure comprising:

the planet carrier comprises two webs which are oppositely arranged;

the pin shaft is arranged on the planet carrier, and two ends of the pin shaft are respectively connected to the two webs;

the bearing without the inner ring and the outer ring is sleeved outside the pin shaft and comprises a plurality of cylindrical rollers and a retainer for mounting the cylindrical rollers, the cylindrical rollers are arranged around the peripheral surface of the pin shaft, and two ends of each cylindrical roller are connected to the retainer;

the planet gear is sleeved outside the bearing without the inner ring and the outer ring.

Optionally, the retainer includes two retainer rings arranged in parallel and a connecting rod, the two retainer rings are respectively disposed at two ends of the cylindrical roller, and the connecting rod is disposed between the two retainer rings and is used for connecting the two retainer rings.

Optionally, the number of the connecting rods is several, and the connecting rods and the cylindrical rollers are alternately arranged along the circumferential direction of the retainer ring.

Optionally, the number of the bearings without the inner ring and the outer ring is two, and the bearings without the inner ring and the outer ring are arranged at two ends of the inner wall of the planet wheel in parallel.

Optionally, a retaining shoulder is arranged on the inner wall of the planet wheel between the two bearings without the inner and outer rings, and the end parts of the two bearings without the inner and outer rings are abutted against the retaining shoulder.

Optionally, one of the two webs is provided with a blind hole for connecting the pin shaft, the other web is provided with a through hole for connecting the pin shaft, one end of the pin shaft is arranged in the blind hole, and the other end of the pin shaft is arranged in the through hole.

Optionally, the inner wall of the through hole is provided with a circle of mounting groove, a check ring is arranged in the mounting groove, and the check ring is abutted against the end part of the pin shaft so that the pin shaft is fixed on the planet carrier.

Optionally, a distance ring is arranged between the bearing without the inner and outer rings and the web.

Optionally, the bearing further comprises a lubricating oil path structure for lubricating the bearing without the inner ring and the outer ring.

Optionally, the lubricating oil path structure includes:

the first oil path is arranged in the web plate and extends from the end part of the web plate to the joint of the web plate and the pin shaft;

the second oil path is a circle of groove formed in the surface of the pin shaft and is communicated with the first oil path;

the third oil path is arranged in the pin shaft, one end of the third oil path is connected with the second oil path, and the third oil path extends along the radial direction of the pin shaft;

the fourth oil path is arranged inside the pin shaft, and one end of the fourth oil path is connected with the third oil path and extends along the axial direction of the pin shaft;

and the fifth oil way is arranged inside the pin shaft, one end of the fifth oil way is connected with the fourth oil way, and the fifth oil way extends to the position of the bearing without the inner ring and the outer ring along the radial direction of the pin shaft.

A wind power gearbox comprising a planetary arrangement as described above.

The utility model has the advantages that:

the utility model discloses a no interior outer lane bearing has inner circle and outer lane in the no interior outer lane bearing, only remains roller and holder, and cylindrical roller's on the bearing inside wall is direct and the contact of round pin axle, and the lateral wall is direct and the contact of planet wheel, that is to say directly regards the round pin axle as the inner circle, regards the planet wheel as the outer lane, realizes the rotation of planet wheel, has avoided the condition of skidding of bearing inner circle and outer lane effectively, has prolonged the life of bearing.

Drawings

FIG. 1 is a schematic cross-sectional structure diagram of a planetary structure in the present invention;

FIG. 2 is an enlarged view of portion A of FIG. 1 according to the present invention;

FIG. 3 is a schematic perspective view of the bearing without inner and outer races;

fig. 4 is a schematic perspective view of the pin shaft of the present invention;

fig. 5 is a schematic view of the cross-sectional structure of the middle pin shaft of the present invention.

In the figure:

10-a planet carrier; 20-a pin shaft; 30-no inner and outer ring bearings; 40-a planet wheel; 50-a retainer ring; 60-distance rings;

11-a web; 111-blind hole; 112-a through hole; 1121-mounting grooves;

31-cylindrical rollers; 32-a cage; 321-a cage ring; 322-a connecting rod;

41-shoulder block;

71-a first oil passage; 72-a second oil path; 73-a third oil path; 74-fourth oil path; 75-a fifth oil path; 76-plug.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

The technical solution of the present invention is further explained by the following embodiments with reference to the accompanying drawings.

The utility model provides a planetary structure, figure 1 is the utility model discloses the cross-sectional structure schematic diagram of well planetary structure, as shown in figure 1, planetary structure includes that planet carrier 10, round pin axle 20 do not have interior outer lane bearing 30 and planet wheel 40. The planet carrier 10 comprises two webs 11 arranged opposite to each other. The pin shaft 20 is arranged on the planet carrier 10, and two ends of the pin shaft 20 are respectively connected to the two webs 11. As shown in fig. 1, the planet 40 is mounted on the pin 20 by bearings 30 without inner and outer races so that the planet 40 can rotate on the pin 20. That is, the bearing 30 without inner and outer races is fitted around the pin 20, and the planet wheel 40 is fitted around the bearing 30 without inner and outer races. Fig. 2 is the enlarged view of a part in fig. 1 of the present invention, fig. 3 is a perspective view of the present invention, which is not provided with an inner and outer race bearing, as shown in fig. 2 and fig. 3, the inner and outer race bearing 30 is not provided with a plurality of cylindrical rollers 31, and a holder 32 for mounting the cylindrical rollers 31, the cylindrical rollers 31 are arranged around the outer peripheral surface of the pin shaft 20, both ends of the cylindrical rollers 31 are connected to the holder 32, and the cylindrical rollers 31 can rotate on the holder 32 to realize the bearing function.

As shown in fig. 2, the inner side wall of the cylindrical roller 31 contacts with the outer wall of the pin shaft 20, the outer side wall of the cylindrical roller 31 contacts with the inner wall of the planet wheel 40, and the cylindrical roller 31 directly contacts with the pin shaft 20 and the planet wheel 40, so that the problem that when the planet wheel 40 is installed through a cylindrical roller bearing in the prior art, the inner ring and the outer ring of the bearing slip to cause the short service life of the bearing is solved. Particularly in the field of wind power gear boxes, the volume and the weight of each part are large, the load of a bearing is huge, and the problem of inner and outer ring slippage is more obvious.

In one embodiment, the retainer 32 is a stamping formed integrally, and as shown in fig. 3, the retainer 32 includes two retainer rings 321 arranged side by side and a connecting rod 322, the two retainer rings 321 are respectively disposed at two ends of the cylindrical roller 31, the connecting rod 322 is disposed between the two retainer rings 321, and the connecting rod 322 is used for connecting the two retainer rings 321. The retainer 32 is formed only by the two retainer rings 321 and the connecting rods 322 connecting the two retainer rings 321, and the cylindrical rollers 31 are installed on the retainer 32 to form the bearing, so that the structure is simplified, and the material cost is lower. And the inner ring and the outer ring of the bearing are not needed, so that the inner ring and the outer ring can be prevented from slipping, and the service life of the bearing can be prolonged.

Further, as shown in fig. 3, the connecting rods 322 are several, and the connecting rods 322 and the cylindrical rollers 31 are alternately arranged along the circumferential direction of the retainer rings 321, so that the connecting strength between the two retainer rings 321 can be improved by arranging the connecting rods 322 and the cylindrical rollers 31 alternately, and the connecting rods 322 can be arranged by fully utilizing the gap between the two cylindrical rollers 31, so that the overall structure is more compact.

In one embodiment, as shown in fig. 2, there are two bearings 30 without inner and outer races, and the two bearings 30 without inner and outer races are disposed at two ends of the inner wall of the planetary gear 40 in parallel, and in the embodiment shown in fig. 2, the bearings are disposed at the left and right ends of the inner wall of the planetary gear 40, so that two ends of the planetary gear 40 can be supported by the bearings, thereby avoiding stress concentration generated when only one bearing is disposed, and improving the operation stability and the service life of the whole assembly. Of course, an inner and outer ring-free bearing 30 with an axial length equal to that of the planet wheel 40 may be provided, so that the inner wall of the planet wheel 40 can be fully supported by only one bearing, but the bearing has a large volume and a heavy weight, and is not suitable for manufacturing and application of wind power gear boxes. In addition, such a bearing is also not convenient for the design of the lubrication circuit in the planetary structure, so, in a preferred embodiment, two bearings 30 without inner and outer rings are respectively disposed at two ends of the inner wall of the planetary gear 40, as shown in fig. 2.

Further, as shown in fig. 2, a shoulder 41 is provided on the inner wall of the planet wheel 40 at a position between the two bearings 30 without the inner and outer races, and the ends of the two bearings 30 without the inner and outer races are abutted against the shoulder 41. The arrangement of the retaining shoulder 41 can limit the bearing 30 without the inner ring and the outer ring on the one hand, and on the other hand, the two bearings 30 without the inner ring and the outer ring can be ensured to form an interval, which are independent from each other and cannot influence each other. More importantly, the lubricating oil can conveniently flow to the bearings 30 without the inner and outer rings from the space formed between the two bearings 30 without the inner and outer rings, so that the bearings 30 without the inner and outer rings can be lubricated by the lubricating oil, the smooth rotation of the bearings is ensured, and the planetary structure can normally run, because the space formed between the two bearings 30 without the inner and outer rings can correspond to the outlet of a lubricating oil path, the lubricating oil can flow out from the space.

Referring to fig. 2, in an embodiment, one of the two webs 11 has a blind hole 111, the other web 11 has a through hole 112, the blind hole 111 and the through hole 112 are used to connect the pin 20, one end of the pin 20 is disposed in the blind hole 111, and the other end is disposed in the through hole 112. The blind hole 11 and the through hole 112 are arranged because when the pin shaft 20 is installed, the pin shaft penetrates through the through hole 112 and the blind hole 111, one end of the blind hole 111 is closed, so that the pin shaft 20 is conveniently positioned, and a fixing piece is arranged in the through hole 112 to fix the pin shaft 20.

Further, the fixing element for fixing the pin 20 in the through hole 112 may be a retaining ring 50, as shown in fig. 2, the inner wall of the through hole 112 is provided with a circle of mounting grooves 1121, the retaining ring 50 is disposed in the mounting grooves 1121, and the retaining ring 50 abuts against the end of the pin 20, so that the pin 20 is fixed on the planet carrier 10. The retainer ring 50 is a fixing member commonly used in the art, and has elasticity, and the retainer ring 50 can be installed in the installation groove 1121 by the elasticity of the retainer ring 50.

In one embodiment, as shown in FIG. 2, a distance ring 60 is provided between the inner and outer race free bearing 30 and the web 11 to position the inner and outer race free bearing 30. The distance ring 60 cooperates with the shoulder 41 to complete the positioning of the two ends of the bearing 30 without inner and outer races.

During installation, please refer to fig. 2, the planet gear 40, the bearing 30 without the inner and outer rings, and the distance ring 60 are matched, and are placed between the webs 11 at the two sides of the planet carrier 10, the pin shaft 20 is inserted from the right side of the through hole 112, and is directly inserted into the blind hole 111 through the bearing 30 without the inner and outer rings and the distance ring 60, and the retainer ring 50 is installed in the installation groove 1121 of the web 11 at the right side to fix the pin shaft 20.

Preferably, the distance ring 5 and the pin shaft 4 are made of bearing steel materials and are relatively wear-resistant.

Referring to fig. 2, the planetary structure of the present invention further includes a lubrication oil path structure for lubricating the bearing 30 without the inner and outer races, and the lubrication oil path structure guides the lubricating oil to the bearing 30 without the inner and outer races, so that the bearing 30 without the inner and outer races is lubricated.

Further, as shown in fig. 2, the lubricating oil path structure includes:

a first oil path 71 provided in the web 11 and extending from an end of the web 11 to a connection of the web 11 and the pin 20, so that lubricating oil can be introduced from the outside to the inside of the planetary structure;

referring to fig. 2, 4 and 5, the second oil path 72 is a circle of grooves formed on the surface of the pin 20, the circle of grooves is arranged along the circumferential direction of the pin 20, and the second oil path 72 is communicated with the first oil path 71; the reason why the second oil path 72 is provided as a circle of groove on the surface of the pin 20 is that it is difficult to align the oil outlet of the first oil path 71 when mounting, and if the second oil path 72 is a circle of groove on the surface of the pin 20 along the circumference thereof, the lubricating oil in the first oil path 71 can be introduced into the second oil path 72 on the pin 20 regardless of how the pin 20 is mounted;

a third oil path 73, as shown in fig. 2 and 5, the third oil path 73 is disposed inside the pin 20, one end of the third oil path 73 is connected to the second oil path 72, and the third oil path 73 extends in the radial direction of the pin 20;

a fourth oil passage 74, as shown in fig. 2 and 5, provided inside the pin shaft 20, having one end connected to the third oil passage 73 and extending in the axial direction of the pin shaft 20;

the fifth oil path 75, as shown in fig. 2 and 5, is disposed inside the pin 20, and one end thereof is connected to the fourth oil path 74 and extends to the position without the inner and outer bearings 30 along the radial direction of the pin 20, and the end of the fifth oil path 75 penetrates the surface of the pin 20 and is located in the gap between the two bearings 30 without the inner and outer rings, so that the lubricating oil can be introduced to the gap and flow to the bearings 30 without the inner and outer rings to achieve lubrication.

As shown in fig. 5, plugs 76 are provided at the ends of the oil passages to limit the flow of the oil in the oil passages, so that the oil flows to the bearings 30 without the inner and outer races.

The utility model also provides a wind-powered electricity generation gear box, including above-mentioned novel structure, the utility model discloses wind-powered electricity generation gear box includes above-mentioned novel structure, so has the beneficial effect that above-mentioned novel structure had at least, and here is repeated no longer giving unnecessary details.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A planetary structure, comprising:

the planet carrier (10), the planet carrier (10) comprises two webs (11) which are oppositely arranged;

the pin shaft (20) is arranged on the planet carrier (10), and two ends of the pin shaft are respectively connected to the two webs (11);

the bearing (30) without the inner ring and the outer ring is sleeved outside the pin shaft (20), the bearing (30) without the inner ring and the outer ring comprises a plurality of cylindrical rollers (31) and a retainer (32) used for installing the cylindrical rollers (31), the cylindrical rollers (31) are arranged around the peripheral surface of the pin shaft (20), and two ends of each cylindrical roller (31) are connected to the retainer (32);

the planet wheel (40), planet wheel (40) cover is located outside no interior outer lane bearing (30).

2. The planetary construction according to claim 1, characterized in that the cage (32) comprises two cage rings (321) arranged side by side and a connecting rod (322), the two cage rings (321) being arranged at the two ends of the cylindrical roller (31), respectively, and the connecting rod (322) being arranged between the two cage rings (321) for connecting the two cage rings (321).

3. The planetary construction according to claim 2, characterized in that the connecting rods (322) are several, the connecting rods (322) alternating with the cylindrical rollers (31) in the circumferential direction of the cage ring (321).

4. Planetary construction according to claim 1, characterised in that the number of bearings (30) without inner and outer races is two and is arranged side by side at both ends of the inner wall of the planet wheel (40).

5. Planetary construction according to claim 4, characterised in that a stop shoulder (41) is arranged on the inner wall of the planet wheel (40) between the two bearings (30) without inner and outer races, against which stop shoulder (41) the ends of both bearings (30) without inner and outer races abut.

6. The planetary structure according to claim 1, characterized in that one of said two webs (11) is provided with a blind hole (111) for connecting said pin (20), and the other is provided with a through hole (112) for connecting said pin (20), one end of said pin (20) being disposed in said blind hole (111), and the other end being disposed in said through hole (112).

7. The planetary structure according to claim 6, wherein the inner wall of the through hole (112) is provided with a circle of mounting groove (1121), a retaining ring (50) is arranged in the mounting groove (1121), and the retaining ring (50) abuts against the end of the pin shaft (20) to fix the pin shaft (20) on the planet carrier (10).

8. The planetary construction according to claim 1, characterized in that a distance ring (60) is arranged between the inner and outer race free bearing (30) and the web (11).

9. The planetary structure according to claim 1, further comprising a lubrication oil path structure for lubricating the inner and outer race-less bearings (30), the lubrication oil path structure comprising:

the first oil path (71) is arranged in the web plate (11) and extends from the end part of the web plate (11) to the joint of the web plate (11) and the pin shaft (20);

the second oil path (72) is a circle of groove formed in the surface of the pin shaft (20), and the second oil path (72) is communicated with the first oil path (71);

the third oil path (73) is arranged inside the pin shaft (20), one end of the third oil path is connected with the second oil path (72), and the third oil path extends along the radial direction of the pin shaft (20);

the fourth oil path (74) is arranged inside the pin shaft (20), one end of the fourth oil path is connected with the third oil path (73), and the fourth oil path extends along the axial direction of the pin shaft (20);

and the fifth oil path (75) is arranged inside the pin shaft (20), one end of the fifth oil path is connected with the fourth oil path (74), and the fifth oil path extends to the position of the bearing (30) without the inner ring and the outer ring along the radial direction of the pin shaft (20).

10. A wind power gearbox comprising a planetary construction according to any of claims 1-9.