CN218440488U

CN218440488U - Gear structure and wind power gear box

Info

Publication number: CN218440488U
Application number: CN202121983341.7U
Authority: CN
Inventors: 许若震; 戚松; 王雪丰; 邓维维
Original assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Current assignee: Nanjing High Speed Gear Manufacturing Co Ltd
Priority date: 2021-08-23
Filing date: 2021-08-23
Publication date: 2023-02-03
Anticipated expiration: 2031-08-23

Abstract

The utility model relates to the technical field of gears, a gear structure and wind-powered electricity generation gear box is disclosed. The gear structure comprises a gear body and a bearing assembly, wherein a through hole is formed in the gear body in the axial direction, the bearing assembly is arranged in the through hole, a hole wall of the through hole is coated with a first coating, the bearing assembly is in contact with the first coating, and the hardness of the first coating is greater than that of the gear body. The gear structure can effectively avoid the phenomena of abrasion, pitting corrosion and peeling of the surface of the hole wall of the gear body caused by the bearing assembly, prolong the service life of the gear body and reduce the maintenance cost of the wind power gear box.

Description

Gear structure and wind power gear box

Technical Field

The utility model relates to the technical field of gears, especially, relate to a gear structure and wind-powered electricity generation gear box.

Background

The gear is a mechanical element which is provided with gear teeth on a wheel rim and is used for continuously meshing and transmitting motion and power, and gear transmission is used as a common mechanical transmission mode and widely applied to heavy equipment such as helicopters, wind power, tanks, high-speed rails, ships and warships and the like. The performance of the gear transmission often directly determines the operational performance, working life, safety and reliability of the equipment.

For the gear, the inner hole wall of the gear is used for being in direct contact with a bearing roller or a bearing outer ring for bearing, and when the inner hole wall of the gear is in direct contact with the bearing roller for bearing, the inner hole wall of the gear has risks of abrasion, pitting corrosion, peeling and the like, so that the service life of the gearbox is shortened.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gear structure and wind-powered electricity generation gear box to there is wearing and tearing, pitting and the problem of risk such as peeling off in the interior pore wall of the gear of solving among the prior art.

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

a gear structure includes a gear body provided with a through hole in an axial direction, and a bearing assembly provided in the through hole, a hole wall of the through hole being coated with a first coating layer, the bearing assembly being in contact with the first coating layer, a hardness of the first coating layer being greater than a hardness of the gear body.

Preferably, the bearing assembly includes an inner ring and a plurality of rollers provided on an outer periphery of the inner ring at intervals in a circumferential direction of the inner ring, and a hole wall of the through hole forms a rolling track of the roller, the roller being in contact with the first coating layer.

Preferably, the gear teeth of the gear body are coated with a second coating having a hardness greater than the hardness of the gear body.

Preferably, both end surfaces of the gear body in the axial direction are coated with the first coating layer.

Preferably, the number of the bearing assemblies is two, and the gear structure further includes a limiting member, and the limiting member is located between the two bearing assemblies in the axial direction of the gear body.

Preferably, in the axial direction of the gear body, the limiting member includes two limiting surfaces, and one of the bearing assemblies is arranged opposite to one of the limiting surfaces;

the roller is abutted against the limiting surface along the axial direction of the gear body.

Preferably, the stopper surface is coated with the first coating.

Preferably, the stopper is integrally formed with the gear body.

Preferably, the stopper and the gear body are formed separately.

A wind power gear box comprises a transmission shaft and the gear structure, wherein the bearing assembly is matched with the transmission shaft.

The utility model has the advantages that:

an object of the utility model is to provide a gear structure and wind-powered electricity generation gear box, this gear structure include gear body and bearing assembly, and the gear body is equipped with the through-hole along the axial, and bearing assembly sets up in the through-hole, and the pore wall of through-hole coats and has first coating, bearing assembly and first coating contact, and the hardness of first coating is greater than the hardness of gear body. In the gear structure, the hole wall of the through hole of the gear body is used as a rolling track of the bearing assembly, and the gear body and the bearing assembly are matched to transmit torque; through the pore wall coating first coating at the through-hole, first coating and bearing assembly contact to avoid bearing assembly direct contact gear body's pore wall, gear body is at the in-process of work, hardness through setting up first coating is greater than gear body's hardness, can effectively reduce first coating's structure damage, thereby avoid bearing assembly to cause gear body's pore wall surface to appear wearing and tearing, the phenomenon that pitting corrosion and peel off, gear body's life has been improved, wind-powered electricity generation gear box's cost of maintenance has been reduced.

Drawings

Fig. 1 is a schematic structural diagram of a gear structure according to an embodiment of the present invention;

fig. 2 is a cross-sectional view of a gear structure provided in an embodiment of the present invention;

fig. 3 is a partial structural schematic diagram of a gear structure according to an embodiment of the present invention.

In the figure:

1. a gear body; 11. a through hole;

21. an inner ring; 22. a roller; 23. a holder;

3. a stopper;

4. a drive shaft.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts all belong to the protection scope of the present invention.

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 "on," "above" and "over" the second feature may include the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

The utility model provides a gear structure and wind-powered electricity generation gear box, as shown in fig. 1-3, this gear structure includes gear body 1 and bearing assembly, and gear body 1 is equipped with through-hole 11 along the axial, and bearing assembly sets up in through-hole 11, and the pore wall of through-hole 11 coats and is scribbled first coating, and the hardness of first coating is greater than gear body 1's hardness. When the pore wall of through-hole 11 is as the outer lane of bearing assembly, set up a plurality of rollers 22 of bearing assembly in the periphery of inner circle 21 along the circumference interval of inner circle 21, a plurality of rollers 22 are direct and the contact of first coating, the pore wall of through-hole 11 is the rolling track of a plurality of rollers 22 promptly, the pore wall direct contact of a plurality of rollers 22 and through-hole 11 can be avoided to first coating, thereby avoid roller 22 to cause the pore wall surface of gear body 1 to appear wearing and tearing, the phenomenon of pitting corrosion and peeling off, the life of gear body 1 has been improved, the cost of maintenance of wind-powered electricity generation gear box has been reduced. When the hole wall of the through hole 11 is directly matched with the outer ring of the bearing assembly, the outer ring of the bearing assembly is directly contacted with the first coating on the hole wall of the through hole 11, and the outer ring of the bearing assembly can be prevented from being directly contacted with the hole wall of the through hole 11, so that the phenomena of abrasion, pitting corrosion and peeling of the outer ring of the bearing assembly on the surface of the hole wall of the gear body 1 are avoided, the service life of the gear body 1 is prolonged, and the maintenance cost of the wind power gear box is reduced. The hardness of the first coating is larger than that of the gear body 1, so that the hardness and the structural strength of the hole wall of the through hole 11 can be improved, the risk of structural damage of the first coating can be reduced, and the maintenance frequency of the first coating is reduced.

Preferably, the first coating has a certain roughness. When the hole wall of the through hole 11 is used as the outer ring of the bearing assembly, the phenomenon that the roller 22 slips when rolling on the hole wall of the through hole 11 can be avoided; when the hole wall of the through hole 11 is directly matched with the outer ring of the bearing assembly, the slipping phenomenon between the outer ring of the bearing assembly and the hole wall of the through hole 11 can be avoided.

Wherein the bearing assembly further comprises a cage 23, as shown in figures 1 and 2. The cage 23 equally spaces the plurality of rollers 22 in the circumferential direction, preventing any adjacent two rollers 22 from colliding or rubbing against each other.

As an alternative, the gear body 1 may be surface-treated by an existing oxidation blackening process to improve the hardness and corrosion resistance of the gear body 1.

Optionally, the teeth of the gear body 1 are coated with a second coating having a hardness greater than the hardness of the gear body 1. Through having coated the second coating on the teeth of a cogwheel at gear body 1, when two gear body 1 meshing, the second coating on two gear body 1 contacts each other, the flank of tooth direct contact of two gear body 1 has been avoided, and simultaneously, hardness through setting up the second coating is greater than gear body 1's hardness, can effectively reduce the structure damage of second coating, thereby flank of tooth direct contact caused when avoiding two gear body 1 meshing, the phenomenon of pitting and peeling off, gear body 1's life has further been improved.

It can be understood that, by replacing the first coating and the second coating regularly, the phenomena of abrasion, pitting corrosion and peeling of the hole wall surface of the gear body 1 and the tooth surface of the gear tooth can be effectively avoided, and the service life of the gear body 1 is prolonged.

Optionally, the first coating thickness is 0.3mm to 0.5mm and the second coating thickness is 0.3mm to 0.5mm. The thickness of the first coating layer is set so as to reduce the rate at which the roller 22 wears and deforms the first coating layer during rolling; by setting the thickness of the second coating layer in this way, the rate of wear and deformation of the second coating layer caused by the meshing of the two gear bodies 1 can be reduced.

Alternatively, both end faces of the gear body 1 in the axial direction are coated with the first coating layer. Through coating first coating on two terminal surfaces of gear body 1, two terminal surfaces and other fitting part direct contact of gear body 1 can be avoided to first coating on two terminal surfaces of gear body 1 to avoid gear body 1 to appear wearing and tearing, pitting and the phenomenon of peeling off along two axial terminal surfaces, thereby further improve gear body 1's life, reduce the cost of maintenance of wind-powered electricity generation gear box.

Optionally, as shown in fig. 1 to 3, two sets of bearing assemblies are provided, and the gear structure further includes a limiting member 3, where the limiting member 3 is located between the two sets of bearing assemblies along the axial direction of the gear body 1. By arranging two groups of bearing assemblies, in the embodiment, along the axial direction of the gear body 1, the two groups of bearing assemblies are respectively positioned in the through hole 11 of the gear body 1 and close to the two ends, so that the gear structure is uniformly stressed along the axial direction of the gear body 1 and has good use performance; by providing the limiting member 3 between the two sets of bearing assemblies, the limiting member 3 serves to space the two bearing assemblies apart, and can define the assembly positions of the two bearing assemblies in the axial direction of the gear body 1.

In this embodiment, the gear body 1 is a bevel gear, when the bevel gear works, the bevel gear is driven to axially shift by the component force of the bevel gear in the axial direction, and the limiting part 3 can limit the moving range of the bevel gear in the axial shift, so that the gear structure can effectively work.

Preferably, the limiting member 3 includes two limiting surfaces along the axial direction of the gear body 1, and one bearing assembly and one limiting surface are oppositely arranged; the roller 22 abuts against the stopper surface in the axial direction of the gear body 1. It can be understood that when the bevel gear works, the component force of the bevel gear in the axial direction drives the bevel gear to axially shift, and when the component force of the bevel gear in the axial direction drives the bevel gear to axially move to the limit position, the plurality of rollers 22 of one of the gear assemblies abut against the corresponding limit surface, so that the moving range of the bevel gear in the axial shift is limited, and the gear structure can effectively work.

Optionally, both limiting surfaces are coated with a first coating. By coating the first coating on the limiting surface, the first coating on the limiting surface can prevent the roller 22 from directly abutting against the limiting surface, and effectively protect the two limiting surfaces of the limiting member 3 from abrasion, pitting and peeling, thereby prolonging the service life of the limiting member 3.

Optionally, the limiting member 3 is integrally formed on the gear body 1. Through setting up locating part 3 integrated into one piece in gear body 1, can reduce the quantity of spare part, the assembly of being convenient for. As an alternative, the limiting part 3 and the gear body 1 are formed in a split manner, so that the limiting part 3 is convenient to replace, later maintenance of each part of the gear structure is convenient, and specifically, the limiting part 3 and the gear body 1 are assembled in an interference manner.

A wind power gear box comprises a transmission shaft 4 and the gear structure, wherein the transmission shaft 4 is assembled on an inner ring 21 in an interference mode. So as to ensure that the gear body 1 can rotate a transmission torque relative to the transmission shaft 4. Simultaneously, use this gear structure can effectively promote the life of wind-powered electricity generation gear box, reduces the cost of maintenance of wind-powered electricity generation gear box.

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. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. 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 gear structure, comprising: the gear comprises a gear body (1) and a bearing assembly, wherein a through hole (11) is formed in the gear body (1) in the axial direction, the bearing assembly is arranged in the through hole (11), a first coating is coated on the hole wall of the through hole (11), the bearing assembly is in contact with the first coating, and the hardness of the first coating is greater than that of the gear body (1).

2. The gear structure according to claim 1, characterized in that the bearing assembly comprises an inner ring (21) and a plurality of rollers (22) provided on an outer periphery of the inner ring (21) at intervals in a circumferential direction of the inner ring (21), a hole wall of the through-hole (11) forming a rolling track of the rollers (22), the rollers (22) being in contact with the first coating layer.

3. Gear structure according to claim 1 or 2, characterised in that the teeth of the gear body (1) are coated with a second coating, the hardness of which is greater than the hardness of the gear body (1).

4. Gear structure according to claim 1 or 2, characterised in that the gear body (1) is coated with the first coating on both end faces in axial direction.

5. The gear structure according to claim 2, characterized in that there are two bearing assemblies, and the gear structure further comprises a retainer (3), and the retainer (3) is located between the two bearing assemblies in the axial direction of the gear body (1).

6. The gear structure according to claim 5, wherein the retainer (3) comprises two retainer surfaces in the axial direction of the gear body (1), one of the bearing assemblies being disposed opposite to the other of the retainer surfaces;

the roller (22) is abutted to the limiting surface along the axial direction of the gear body (1).

7. The gear structure of claim 6, wherein both of the limiting surfaces are coated with the first coating.

8. The gear structure according to claim 6, characterized in that the retainer (3) is integrally formed to the gear body (1).

9. The gear structure according to claim 6, characterized in that the retainer (3) and the gear body (1) are formed separately.

10. A wind power gearbox comprising a drive shaft (4) and a gear arrangement according to any of claims 1-9, the bearing assembly cooperating with the drive shaft (4).