阅读说明：本技术 一种具有供油润滑功能的鼓形齿轮 (Drum gear with oil supply and lubrication functions ) 是由 张国涛 王孝义 史英康 夏清华 杨晓红 黄显贵 杨远航 于 2021-01-25 设计创作，主要内容包括：本发明公开了一种具有供油润滑功能的鼓形齿轮,它包括齿轮基体、鼓形齿、微孔槽、轴孔、键槽孔；鼓形齿与齿轮基体为一整体,微孔槽开设在鼓形齿的齿面上,轴孔开设在齿轮基体的中心部位,键槽孔开设在轴孔的内壁上。微孔槽均匀开设在鼓形齿每个齿前后两个齿面的接触区上,每个齿面上微孔槽的个数为6～12个。微孔槽在齿面接触区上呈环形阵列分布,且每个微孔槽从外边向中心从大到小锥形过渡。本发明鼓形齿轮可以使齿轮副端面的润滑油渗入接触界面,在接触界面间构成润滑剂的循环流动,保障了鼓型齿轮的高效润滑,满足连铸连轧冶金传动装备的工作要求。(The invention discloses a crowned gear with oil supply and lubrication functions, which comprises a gear matrix, a crowned tooth, a micro-hole groove, a shaft hole and a key groove hole, wherein the gear matrix is provided with a plurality of teeth; the crown gear and the gear base body are integrated, the micro-pore groove is formed on the tooth surface of the crown gear, the shaft hole is formed in the center of the gear base body, and the key groove hole is formed in the inner wall of the shaft hole. The micro-hole grooves are uniformly formed in contact areas of the front tooth surface and the rear tooth surface of each crown tooth, and the number of the micro-hole grooves on each tooth surface is 6-12. The micro-hole grooves are distributed in an annular array on the tooth surface contact area, and each micro-hole groove is in conical transition from large to small from the outer edge to the center. The drum-shaped gear can enable lubricating oil on the end face of the gear pair to permeate into the contact interface, and the circulating flow of the lubricating agent is formed between the contact interfaces, so that the high-efficiency lubrication of the drum-shaped gear is ensured, and the working requirements of continuous casting and rolling metallurgical transmission equipment are met.)

1. A drum gear with oil supply and lubrication functions is characterized in that: the gear comprises a gear matrix ()1, a drum-shaped tooth (2), a micropore groove (3), a shaft hole (4) and a key groove hole (5); the crowned teeth (2) and the gear base body (1) are integrated, the micro-hole grooves (3) are formed in the tooth surface of the crowned teeth (2), the shaft hole (4) is formed in the center of the gear base body (1), and the key groove hole (5) is formed in the inner wall of the shaft hole (4).

2. The drum gear with an oil supplying and lubricating function according to claim 1, wherein: the micro-hole grooves (3) are uniformly formed in contact areas of front tooth surfaces and rear tooth surfaces of each drum-shaped tooth (2), and the number of the micro-hole grooves (3) on each tooth surface is 6-12.

3. The drum gear with an oil supplying and lubricating function according to claim 2, wherein: the micropore grooves (3) are arranged on two sides of a crowned gear tooth surface contact area, and the crowned gear tooth surface contact area refers to a part of the crowned tooth 2, wherein the middle part of the tooth surface of the crowned tooth is bulged outwards.

4. The drum gear with an oil supplying and lubricating function according to claim 1, wherein: the micro-hole grooves (3) are distributed in an annular array on the tooth surface contact area, and each micro-hole groove is in conical transition from large to small from the outer edge to the center.

5. The drum gear with an oil supplying and lubricating function according to claim 1, wherein: the axial length of the micropore groove (3) is 20-80 mu m, the taper angle of the micropore groove is 10-30 degrees, and the variation range of the width of the micropore groove in the axial direction is 3-10 mu m.

6. The drum gear with an oil supplying and lubricating function according to claim 1, wherein: the included angle between the adjacent micro-hole grooves (3) is 360 degrees/the number of the micro-hole grooves, and the included angle between the adjacent micro-hole grooves is preferably 60 degrees to 30 degrees.

7. The drum gear with an oil supplying and lubricating function according to claim 1, wherein: the depth of the micropore groove (3) is 2-6 μm.

8. The drum gear with an oil supplying and lubricating function according to claim 1, wherein: the bottom surface of the micropore groove (3) is a circular arc surface, a triangular pyramid surface or a rectangular surface or a combination of the shapes.

Technical Field

The invention relates to the technical field of lubrication of drum-shaped gear couplings in steel rolling machinery, in particular to a drum-shaped gear lubrication technology in a crowned tooth coupling.

Background

The continuous casting and rolling (CSP) of the sheet strip steel is the leading-edge technology of the metallurgical industry, has the advantages of reliable rolling precision, high efficiency, low energy consumption and the like, and the stability of the CSP rolling process puts higher performance requirements on the transmission equipment. Because the end face of the gear tooth of the drum-shaped gear is an involute tooth profile, the axial middle position of the gear tooth bulges outwards, when the drum-shaped gear is meshed with the inner gear ring to transmit power, small-amplitude angular displacement and axial displacement can occur between the inner gear ring and the drum-shaped gear, and therefore the two connecting shafts of the drum-shaped gear coupling have the characteristics of certain self-compensation axial inclination angle, adjustable axial displacement and the like. Therefore, the drum-shaped gear is a core component for bearing and transmitting torque in the crowned tooth coupling and plays an irreplaceable role in the metallurgical equipment transmission coupling.

At present, a drum-shaped gear in metallurgical transmission equipment usually adopts a thin oil lubrication working mode, the thin oil lubrication is to inject lubricating oil into the end face of a gear pair by means of a hydraulic pump to lubricate a gear meshing surface, and the thin oil lubrication has the following defects: an inner gear pair (shown in figure 1) is formed by a traditional drum-shaped gear and an inner gear ring, contact between the gear pair is point contact, a contact area deforms under the working condition of high torque, the contact area is an elliptical surface contact after deformation, the gap of the elliptical contact surface is extremely small, and in addition, the contact stress between contact interfaces is large, so only by the flowing of lubricating oil, only a small part of external oil supply can enter a gear meshing part, most of oil is extruded to the periphery of the meshing area and is accumulated in a cavity of the gear pair, the lubricating quality of the contact area is poor, the temperature rise of a gear system is fast and difficult to dissipate under the working condition of dry friction, the tooth surface of the drum-shaped gear is easy to generate gluing and abrasion phenomena, the lubricating quality is influenced, and the service life of the.

Patent CN 111692505A discloses a lubricating device of a gear coupling and a using method thereof, wherein an annular porous oil storage cavity is arranged on the end face of a drum-shaped gear, and oil in the oil storage cavity is blown to the meshing position of the drum-shaped gear by means of an air compressor, so that an oil passage is prevented from being arranged in the coupling. However, the oil storage device needs to be replaced frequently, which brings great inconvenience to the oiling and maintenance of the coupler.

Patent CN 111692220A discloses a lubricated gear coupling of high efficiency, and this patent focuses on the problem that the lubricated efficiency of current shaft coupling gear pair is not high, processes the round recess at drum type gear engagement area (the flank of tooth middle part of drum type gear) to through oilhole connecting groove and meshing area, thereby make fluid get into the meshing area smoothly. According to the scheme, the meshing efficiency of the drum-shaped gear is improved, but because an oil storage tank is required to be attached to the drum-shaped gear, lubricating grease needs to be supplemented periodically during working, the lubricating quality and the working efficiency of the drum-shaped gear coupling are influenced, and serious consequences can be caused once oil supplement is forgotten due to manual negligence.

In summary, in the oil lubrication scheme of the existing drum-type gear coupling, although the lubricating oil supplied to the end face of the gear pair is sufficient, the oil at the entrance of the meshing area of the gear pair cannot enter the contact interface, so that the amount of the oil for effective lubrication is seriously insufficient, and the surface of the drum-type gear is easy to be glued and abraded. The existing structure for providing lubricating oil for the meshing area is complex, and the cost is increased. In order to meet the requirements of long-distance transmission of CSP rolling power and stability of strip steel rolling process, the grease lubrication method of the existing crowned tooth coupling needs to be improved and a new drum-shaped gear lubrication technology needs to be developed.

Disclosure of Invention

The invention aims to solve the problem of providing a drum gear with an oil supply and lubrication function, which can ensure that lubricating oil on the end surface of a gear pair permeates into a contact interface to form the circulating flow of the lubricating oil between the contact interfaces, ensure the efficient lubrication of the drum gear and meet the working requirements of continuous casting and rolling metallurgy transmission equipment. Meanwhile, lubricating oil remained on the end face of the gear pair can enter a gear contact interface at the moment of no external oil pressure or drum-shaped gear starting, so that abrasion of the gear at the starting stage is prevented. In addition, the invention has simple structure and lower cost.

The invention relates to a crowned gear with oil supply and lubrication functions, which comprises a gear matrix, a crowned tooth, a micro-hole groove, a shaft hole and a key groove hole, wherein the gear matrix is provided with a plurality of teeth; the crown gear and the gear base body are integrated, the micro-pore groove is formed on the tooth surface of the crown gear, the shaft hole is formed in the center of the gear base body, and the key groove hole is formed in the inner wall of the shaft hole.

Furthermore, the micro-pore grooves are uniformly formed in contact areas of front tooth surfaces and rear tooth surfaces of each crown tooth, and the number of the micro-pore grooves on each tooth surface is 6-12.

Furthermore, the micro-hole grooves are formed on two sides of a crowned gear tooth surface contact area, and the crowned gear tooth surface contact area refers to a part of the crowned gear tooth surface, wherein the middle part of the crowned gear tooth surface bulges outwards.

Further, the micro-cavities are distributed in an annular array on the tooth surface contact area, and each micro-cavity is in a conical transition from large to small from the outer edge to the center.

Furthermore, the axial length of the micropore groove is 20-80 μm, the taper angle of the micropore groove is 10-30 degrees, and the variation range of the width of the micropore groove in the axial direction is 3-10 μm.

Furthermore, the included angle between the adjacent microporous grooves is 360 °/the number of the microporous grooves, and the included angle between the adjacent microporous grooves is preferably 60 ° to 30 °.

Further, the depth of the micropore groove is 2-6 μm.

Furthermore, the bottom surface of the micropore groove is a circular arc surface, a triangular pyramid surface or a rectangular surface or a combination of the shapes.

The drum-shaped gear has the beneficial effects that: firstly, when the external oil supply pressure is not established at the starting stage of the drum-shaped gear pair, namely the external oil supply pressure is zero, the specific capillary self-driving force of the micropore groove can spontaneously drive the lubricating oil liquid remained on the end surface of the gear pair to spontaneously permeate into the contact interface of the drum-shaped gear, so that a good lubricating effect is achieved; secondly, in the running process of the gear, lubricating oil on the end face of the gear pair seeps into a contact interface under the drive of oil supply pressure and capillary force of the micropore groove, oil entering the contact area is extruded out under the action of contact pressure of the gear teeth, and the oil forms circular flow between the contact interfaces, so that the lubricating effect is ensured; after the oil enters the contact interface, the micro-pore grooves form a wedge-shaped convergence space between the contact interfaces, so that a dynamic pressure film effect is more favorably formed, the dynamic pressure bearing performance of a lubricating oil film is enhanced, the lubricating quality is improved, the oil flowing condition between the contact interfaces of the gear pair is improved, and the heat of a meshing area is dissipated in time; thirdly, the whole micropore groove is processed into a cone shape, so that the micropore groove has certain capillary driving force, and the bottom surface of the micropore groove is processed into a micro-structure shape or a combination of multiple composite shapes for the second time, so that the capillary driving force of the micropore groove is further enhanced; when the external oil supply pressure is zero, the lubricating oil remained on the end surface of the gear pair can spontaneously permeate into a contact interface of the drum-shaped gear under the action of strong capillary force, so that a good self-lubricating effect is achieved; and fourthly, only the micro-pore grooves are required to be processed on the tooth surfaces of the two sides of the drum-shaped gear, the processing technology is simple, the manufacturing process is convenient, the existing crowned tooth coupling can be conveniently upgraded and modified, and the cost is low.

Drawings

FIG. 1 is a schematic structural diagram of a gear pair composed of a drum gear and an inner gear ring;

FIG. 2 is a schematic view of the construction of the drum gear of the present invention;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

FIG. 4 is a schematic view of a micro-well being a circular arc bottom well;

FIG. 5 is a schematic view of a bottom surface groove with a triangular pyramidal micro-hole groove;

FIG. 6 is a schematic view of a micro-well being a rectangular bottom well;

FIG. 7 is a schematic view of a composite bottom surface slot with rectangular and circular arc shaped micro-hole slots;

FIG. 8 is a schematic view of a bottom surface groove with rectangular and triangular pyramidal micro-grooves.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples.

Example 1

As can be seen from FIG. 2, the crown gear with oil supply and lubrication functions of the invention comprises a gear base body 1, a crown tooth 2, a micropore groove 3, a shaft hole 4 and a key groove hole 5; the crown gear 2 and the gear base body 1 are integrated, the micro-hole groove 3 is arranged on the tooth surface of the crown gear 2, the shaft hole 4 is arranged at the central part of the gear base body 1, and the key groove hole 5 is arranged on the inner wall of the shaft hole 4.

Wherein, the shaft hole 4 is used for installing the transmission shaft, and the key slot hole 5 is used for positioning between the gear and the transmission shaft. The end face of the drum-shaped tooth 2 is an involute tooth profile, and the axial middle position of the tooth is bulged outwards.

The micro-hole grooves 3 have a drainage function, namely, in the starting stage and the working process of the drum-shaped gear, oil supply on the end face of the external gear can be smoothly led into a contact zone through the micro-hole grooves 3 on the tooth surface, and oil entering the contact zone is extruded under the action of the contact pressure of the gear teeth, so that the oil in the contact interface flows circularly; the micro-hole grooves form wedge-shaped convergence spaces between the contact interfaces, so that the dynamic pressure bearing performance of a lubricating oil film is enhanced, the lubricating quality is improved, the oil flowing condition between the contact interfaces of the gear pair is improved, the heat of a meshing area is dissipated in time, the temperature of a drum-shaped gear transmission pair system is reduced, and the probability of the phenomena of gluing and abrasion of the tooth surface of the drum-shaped gear is reduced.

Example 2

As can be seen from fig. 3, the drum gear of the present invention has an oil supply and lubrication function: the micro-hole grooves 3 are uniformly formed in contact areas of the front tooth surface and the rear tooth surface of each crown tooth 2, and the number of the micro-hole grooves 3 on each tooth surface is 6-12.

The micropore grooves 3 are formed on two sides of a crowned gear tooth surface contact area, and the crowned gear tooth surface contact area refers to a part of the crowned tooth 2, wherein the middle part of the tooth surface of the crowned tooth bulges outwards. Along with the development of metallurgical mechanical equipment towards the trend of high speed and heavy load, the contact stress between the contact interfaces of the drum-shaped gear is large, and the contact interfaces must be fully lubricated, so that the number of the micro-hole grooves 3 on the single side surface of each tooth of the drum-shaped tooth 2 is 6-12, and the lubricating effect is ensured.

Example 3

As can be seen from fig. 3, the drum gear of the present invention has an oil supply and lubrication function: the micro-cavities 3 are distributed in an annular array on the tooth surface contact area, and each micro-cavity is in a conical transition from large to small from the outer edge to the center.

The taper of the micropore groove 3 from large to small further improves the capillary driving force and forms a wedge-shaped convergence space. The micro-hole grooves 3 are distributed in an annular array mode, and the conical structures enable lubricating oil to flow from the two end faces of the gear to the center, enable the oil to reach a contact area, form a wedge-shaped convergence space, enhance the dynamic pressure bearing performance of the lubricating oil film, improve the lubricating quality, improve the oil flowing condition between contact interfaces of the gear pair, enable the heat of a meshing area to be dissipated in time, reduce the temperature of a transmission pair system of the drum-shaped gear, and reduce the probability of the phenomena of gluing and abrasion of the tooth surface of the drum-shaped gear.

Example 4

The invention relates to a drum gear with oil supply and lubrication functions, which comprises the following components: the axial length of the micropore groove 3 is 20-80 mu m, the taper angle of the micropore groove is 10-30 degrees, and the variation range of the width of the micropore groove in the axial direction is 3-10 mu m.

The included angle between the adjacent micro-hole grooves 3 is 360 degrees/the number of the micro-hole grooves, and the included angle between the adjacent micro-hole grooves is preferably 60 degrees to 30 degrees.

Through the restriction to the shape, the size, the arrangement mode and the like of the micropore grooves 3, the micropore grooves 3 can guide lubricating oil and can also store the lubricating oil, and meanwhile, a wedge-shaped convergence space is formed.

Example 5

The invention relates to a drum gear with oil supply and lubrication functions: the depth of the micropore groove 3 is 2-6 μm.

The micro-pore grooves 3 store oil and simultaneously ensure that the oil is uniformly distributed on the contact surface through the micro-pore grooves as far as possible so as to ensure the lubricating effect, so that the depth of the micro-pore grooves 3 is smaller than the length size of the micro-pore grooves, and the area of the micro-pore grooves on the contact surface is increased.

Example 6

As is clear from fig. 4, 5, 6, 7, and 8, the bottom surface of the micro-groove 3 is a circular arc surface, a triangular pyramid surface, a rectangular surface, or a combination of these shapes.

The micro-hole grooves 3 are called arc bottom surface hole grooves, triangular pyramid bottom surface hole grooves, rectangular and triangular pyramid composite bottom surface hole grooves, rectangular and arc composite bottom surface hole grooves corresponding to the bottom surface shape.

The bottom surface of the micro-hole groove 3 is processed with the combination of micro-structure shapes or multiple composite shapes for further enhancing the capillary driving force, so that the lubricating oil liquid remained on the end surface of the gear pair can spontaneously permeate into the contact interface of the drum gear under the action of strong capillary force in the starting stage of the drum gear pair when the external oil supply pressure is not established, a good lubricating effect is achieved, and the abrasion in the starting stage of the drum gear is avoided.

The drum-shaped gear has the beneficial effects that: firstly, when the external oil supply pressure is not established at the starting stage of the drum-shaped gear pair, namely the external oil supply pressure is zero, the specific capillary self-driving force of the microporous groove 3 can spontaneously drive the lubricating oil liquid remained on the end surface of the gear pair to spontaneously permeate into the contact interface of the drum-shaped gear, so that a good lubricating effect is achieved, the phenomenon of lack of oil lubrication when no external oil pressure acts is avoided, and the abrasion of the starting stage of the drum-shaped gear is avoided; secondly, in the running process of the gear, lubricating oil on the end face of the gear pair infiltrates into a contact interface under the driving of oil supply pressure and capillary force of the micropore groove 3, oil entering a contact area is extruded out under the action of contact pressure of the gear teeth, and the oil forms circular flow between the contact interfaces, so that the lubricating effect is ensured; after the oil enters the contact interface, the micro-pore grooves form a wedge-shaped convergence space between the contact interfaces, so that a dynamic pressure film effect is more favorably formed, the dynamic pressure bearing performance of a lubricating oil film is enhanced, the lubricating quality is improved, the oil flowing condition between the contact interfaces of the gear pair is improved, the heat of a meshing area is dissipated in time, the surface gluing and abrasion phenomena of the drum-shaped gear are avoided, and the working requirements of continuous casting and rolling metallurgical transmission equipment are met; thirdly, the whole micropore groove is processed into a cone shape, so that the micropore groove has certain capillary driving force, and the bottom surface of the micropore groove is processed into a micro-structure shape or a combination of multiple composite shapes for the second time, so that the capillary driving force of the micropore groove is further enhanced; when the external oil supply pressure is zero, the lubricating oil remained on the end surface of the gear pair can spontaneously permeate into a contact interface of the drum-shaped gear under the action of strong capillary force, so that a good self-lubricating effect is achieved; and fourthly, only the micro-pore grooves are required to be processed on the tooth surfaces of the two sides of the drum-shaped gear, the processing technology is simple, the manufacturing process is convenient, the existing crowned tooth coupler in a workshop can be conveniently upgraded and modified, the cost is low, and the lubricating quality is reliable.

In a word, the gear micropore groove has strong capillary driving force, when no external oil pressure exists or the drum-shaped gear is started, lubricating oil remained on the end face of the gear pair can spontaneously permeate into a drum-shaped gear contact interface under the action of strong capillary force, so that a good self-lubricating effect is achieved, and abrasion of the drum-shaped gear in the starting stage is avoided; in the gear running process, lubricating oil is accurately supplied to the gear tooth meshing part, the defects that the lubricating oil supplied from the end face of the traditional drum-shaped gear pair cannot enter a contact region and the lubricating efficiency of the lubricating oil is low are overcome, and unnecessary consumption and energy waste of the lubricating oil are avoided; the lubricating quality is improved, simultaneously, the gear meshing heat is taken away, the temperature of a drum-shaped gear transmission auxiliary system is reduced, and the probability of the phenomena of gluing and abrasion of the tooth surface of the drum-shaped gear is reduced.