CN219734175U

CN219734175U - Rotary kiln auxiliary transmission gear box sealing structure and rotary kiln driving mechanism

Info

Publication number: CN219734175U
Application number: CN202320248681.8U
Authority: CN
Inventors: 卢正新; 楼杰峰; 何健; 吴建中
Original assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Current assignee: Nanjing High Speed and Accurate Gear Group Co Ltd
Priority date: 2023-02-18
Filing date: 2023-02-18
Publication date: 2023-09-22
Anticipated expiration: 2033-02-18

Abstract

The utility model provides a rotary kiln auxiliary transmission gear box sealing structure and a rotary kiln driving mechanism, and relates to the field of gear boxes; the oil seal ring, the oil seal cover and the penetrating cover are sleeved outside the output shaft and are all positioned at the outer side of the bearing, the penetrating cover is connected with the motor flange, the oil seal ring is positioned between the oil seal cover and the bearing, and the inner side of the penetrating cover is abutted with the outer side of the oil seal cover; a first gap is formed between the inner peripheral surface of the oil seal ring and the outer peripheral surface of the oil seal cover, and the oil seal cover and the penetrating cover form a labyrinth seal structure together. The sealing structure can improve the shaft end sealing effect, prevent the internal lubricating oil from exuding and play a role in dust prevention, and improve the effectiveness and reliability of shaft end sealing of the speed reducer.

Description

Rotary kiln auxiliary transmission gear box sealing structure and rotary kiln driving mechanism

Technical Field

The utility model relates to the field of gear boxes, in particular to a sealing structure of an auxiliary transmission gear box of a rotary kiln and a rotary kiln driving mechanism.

Background

A rotary kiln is an apparatus for burning fuel, which has a large combustion space and a heat power plant, is capable of supplying sufficient combustion air, and is excellent in the equipment of a combustion device. In order to ensure the normal use of the rotary kiln, the transmission equipment of the rotary kiln is usually composed of a main speed reducer and an auxiliary transmission speed reducer. In a normal working state, the auxiliary transmission speed reducer does not work, and the output end of the main speed reducer drives the kiln body of the rotary kiln to rotate; when the input end of the main speed reducer fails or equipment needs to be overhauled, the auxiliary transmission motor can be used for driving the auxiliary transmission speed reducer, so that the main speed reducer is driven to slowly run, and the rotary kiln is guaranteed not to stop rotating. The input end of the main speed reducer is of a double-input structure, and when the auxiliary transmission speed reducer works, the overrunning clutch can be converted into a working state from an original high-speed idling state; in most of high-speed idle running states, the temperature of the output end of the auxiliary transmission speed reducer is high, and the effectiveness and reliability of the sealing device of the auxiliary transmission speed reducer must be considered while lubrication and cooling of the structure are guaranteed.

In the prior art, the shaft end of the speed reducer is sealed by adopting an oil seal or the oil seal and a radial labyrinth groove are combined to be used, and because the temperature of the equipment of the rotary kiln is higher, the temperature of the output end of the auxiliary transmission speed reducer is raised when the overrunning clutch idles at high speed, the common rubber oil seal is easy to age after long-term use, and when the speed reducer runs at high speed, the risk of oil leakage caused by failure of the oil seal is extremely high, and the dustproof effect is poor.

Disclosure of Invention

The utility model aims to provide an auxiliary transmission gear box sealing structure of a rotary kiln and a rotary kiln driving mechanism, which can improve the shaft end sealing effect, prevent internal lubricating oil from exuding, play a role in dust prevention and improve the effectiveness and reliability of shaft end sealing of a speed reducer.

Embodiments of the present utility model are implemented as follows:

in a first aspect, the present utility model provides a rotary kiln auxiliary drive gearbox sealing structure, comprising:

the motor comprises a motor flange, an output shaft, a bearing, an oil sealing ring, a penetrating cover and an oil sealing cover, wherein the motor flange is provided with an assembly hole, the bearing is embedded in the assembly hole, and the output shaft penetrates through the bearing; the oil seal ring, the oil seal cover and the transparent cover are sleeved outside the output shaft and are all positioned at the outer side of the bearing, the transparent cover is connected with the motor flange, the oil seal ring is positioned between the oil seal cover and the bearing, and the inner side of the transparent cover is abutted with the outer side of the oil seal cover; a first gap is formed between the inner peripheral surface of the oil seal ring and the outer peripheral surface of the oil seal cover, and the oil seal cover and the penetrating cover form a labyrinth sealing structure together.

In an alternative embodiment, the oil seal ring comprises an integrated outer ring and an annular inner plate, wherein the annular inner plate is positioned in the outer ring and is coaxially arranged, and the annular inner plate is sleeved outside the output shaft; the part of the oil seal cover penetrates through the annular inner plate, and a first gap is formed between the outer peripheral surface of the oil seal cover and the inner peripheral surface of the annular inner plate.

In an alternative embodiment, the oil seal cover comprises an integrated middle ring body, and a first ring body and a second ring body which are positioned at two sides of the middle body, wherein the outer peripheral surface of the middle ring body is simultaneously provided with the outer peripheral surface of the first ring body and the outer peripheral surface of the second ring body in a protruding mode, the first ring body penetrates through the annular inner plate, and the first gap is formed between the outer peripheral surface of the first ring body and the inner peripheral surface of the annular inner plate; the output shaft penetrates through the middle ring body, the first ring body and the second ring body at the same time.

In an alternative embodiment, the transparent cover is provided with a penetrating hole, an end face of the transparent cover is provided with an annular groove communicated with the penetrating hole, the second ring body is inserted into the penetrating hole, the middle ring body is located in the annular groove, and the middle ring body and the annular groove jointly form a labyrinth sealing structure.

In an alternative embodiment, an annular baffle plate is convexly arranged on the hole wall of the penetrating hole, and the annular baffle plate is positioned on one side of the bottom wall of the annular groove; the output shaft is sleeved with a shaft sleeve, and the annular baffle is sleeved with the shaft sleeve and forms a second gap with the shaft sleeve; and a third gap is formed between the outer peripheral surface of the intermediate ring body and the peripheral wall of the annular groove.

In an alternative embodiment, a side of the second ring body remote from the first ring body abuts an end face of the sleeve.

In an alternative embodiment, a skeleton oil seal is arranged between the shaft sleeve and the transparent cover.

In an alternative embodiment, the transparent cover is provided with a fixing hole, and a fastener is arranged in the fixing hole in a penetrating way, and the fastener is used for fixing the transparent cover on the motor flange.

In an alternative embodiment, the first gap is provided between 0.4mm and 0.6 mm.

In a second aspect, the present utility model provides a rotary kiln drive mechanism comprising:

the rotary kiln auxiliary drive gearbox sealing structure according to any one of the preceding embodiments.

The embodiment of the utility model has the beneficial effects that:

in summary, this embodiment provides a rotary kiln auxiliary drive gear box seal structure, through cup jointing oil seal ring, oil blanket lid and through lid outside the output shaft, utilize through lid to fix a position oil seal ring and oil blanket lid in the axial position department of bearing, restriction oil seal ring and oil blanket lid are for the axial motion of output shaft, are formed with first clearance between oil seal ring and the oil blanket lid, and both are not direct contact, when preventing friction heating, can obviously reduce the lubricating oil mass that outwards overflows by the one end that the bearing is located. Meanwhile, a labyrinth sealing structure is formed between the oil sealing cover and the penetrating cover, and the labyrinth sealing structure can reduce the oil quantity in the containing cavity formed among the oil sealing ring, the oil sealing cover and the penetrating cover again, reduce the seepage quantity of lubricating oil and can effectively play a role in preventing dust and oil leakage.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of a sealing structure of an auxiliary transmission gearbox of a rotary kiln according to an embodiment of the utility model;

FIG. 2 is a schematic view of a hidden motor flange of a sealing structure of an auxiliary transmission gearbox of a rotary kiln according to an embodiment of the utility model;

FIG. 3 is a schematic cross-sectional view of a sealing structure of an auxiliary transmission gearbox of a rotary kiln according to an embodiment of the utility model;

FIG. 4 is a schematic view of a partial enlarged structure in FIG. 3;

fig. 5 is an exploded schematic view of a part of the structure of the sealing structure of the auxiliary transmission gearbox of the rotary kiln according to the embodiment of the utility model.

Icon:

001-a first gap; 002-a second gap; 003-third gap; 100-motor flange; 200-an output shaft; 300-bearing; 400-oil seal ring; 410-outer ring; 420-an annular inner plate; 500-oil seal cap; 510-an intermediate ring; 520-a first ring body; 530-a second ring body; 600-penetrating cover; 610-perforating holes; 620-an annular groove; 630-annular baffles; 640-mounting grooves; 700-skeleton oil seal; 800-shaft sleeve.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the utility model, as presented in the figures, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," "third," and the like are used merely to distinguish between descriptions and should not be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal," "vertical," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Examples

Referring to fig. 1-5, the embodiment provides a sealing structure of an auxiliary transmission gearbox of a rotary kiln, which comprises a motor flange 100, an output shaft 200, a bearing 300, an oil seal ring 400, an oil seal cover 500 and a through cover 600, wherein the motor flange 100 is provided with an assembly hole, the bearing 300 is embedded in the assembly hole, and the output shaft 200 is penetrated in the bearing 300; the oil seal ring 400, the oil seal cover 500 and the transparent cover 600 are sleeved outside the output shaft 200 and are all positioned at the outer side of the bearing 300, the transparent cover 600 is connected with the motor flange 100, the oil seal ring 400 is positioned between the oil seal cover 500 and the bearing 300, and the inner side of the transparent cover 600 is abutted with the outer side of the oil seal cover 500; the oil seal ring 400 has a first gap 001 between an inner circumferential surface thereof and an outer circumferential surface of the oil seal cover 500, and the oil seal cover 500 and the penetration cover 600 together form a labyrinth seal structure.

According to the above, the oil seal ring 400, the oil seal cover 500 and the through cover 600 are all arranged on the outer side of the bearing 300, namely, on the side of the bearing 300 far away from the overrunning clutch, and are less affected by the overrunning clutch, meanwhile, a first gap 001 is formed between the oil seal ring 400 and the oil seal cover 500, when the output shaft 200 operates, the oil seal ring 400 and the oil seal cover 500 can form oil film seal at the gap, and the oil seal ring 400 and the oil seal cover 500 are not in direct contact, so that the oil quantity of lubricating oil overflowed outwards from one end of the bearing 300 can be obviously reduced while friction heating is prevented. Meanwhile, a labyrinth sealing structure is formed between the oil seal cover 500 and the transparent cover 600, and a sealing oil film formed at the first gap 001 is matched, so that the sealing effect can be enhanced, and the safety and reliability can be improved.

Referring to fig. 3 and 5, in the present embodiment, optionally, the oil seal ring 400 includes an outer ring 410 and an inner ring plate 420 that are integrated. The outer ring 410 and the annular inner plate 420 are both of annular structures, the annular inner plate 420 is located in the outer ring 410 and is coaxially arranged, the thickness of the annular inner plate 420 in the axial direction is smaller than the length of the outer ring 410 in the axial direction, and the annular inner plate 420 is located at the middle position of the outer ring 410 in the axial direction. The output shaft 200 is inserted into the annular inner plate 420, and the output shaft 200 and the annular inner plate 420 have annular space, that is, the outer peripheral surface of the output shaft 200 is not directly contacted with the inner peripheral surface of the annular inner plate 420, and the annular space formed by the output shaft 200 and the annular inner plate provides an assembly space for the oil seal cover 500. That is, the portion of the oil seal cover 500 can be penetrated in the inner annular plate 420, and the output shaft 200 is penetrated in the oil seal cover 500, so that the portion of the oil seal cover 500 is sandwiched between the inner annular plate 420 and the output shaft 200, and the outer circumferential surface of the oil seal cover 500 and the inner circumferential surface of the inner annular plate 420 have an annular gap, that is, the first gap 001. Meanwhile, the outer ring 410 is fitted into the fitting hole, and one end surface of the outer ring 410 abuts against the bearing 300, whereby the degree of freedom of the outer ring 410 in one direction can be restricted by the bearing 300.

Referring to fig. 3-5, in the present embodiment, optionally, the oil seal cover 500 includes an integral middle ring 510 and a first ring 520 and a second ring 530 located at two sides of the middle. The intermediate ring 510, the first ring 520 and the second ring 530 are all configured as a ring structure, and the outer circumferential surface of the intermediate ring 510 is simultaneously protruded with the outer circumferential surfaces of the first ring 520 and the second ring 530, that is, the outer circumferential diameter of the intermediate ring 510 is larger than the outer circumferential diameters of the first ring 520 and the second ring 530. During assembly, the middle ring body 510, the first ring body 520 and the second ring body 530 are all sleeved outside the output shaft 200, the first ring body 520 penetrates through an annular space formed between the annular inner plate 420 and the output shaft 200, and an annular first gap 001 is formed between the outer peripheral surface of the first ring body 520 and the inner peripheral surface of the annular inner plate 420. And, there is a space between the inner annular plate 420 and the intermediate ring body 510. So designed, when the oil seal 500 rotates with the output shaft 200 with respect to the oil seal 400, the oil seal 500 is not in direct contact with the oil seal 400, reducing heat generated by friction.

The first gap 001 is a circular gap, and the single side size of the first gap 001 is set between 0.4mm and 0.6mm, for example, the single side size of the first gap 001 is set to 0.4mm, 0.5mm, or 0.6mm, which is not specifically exemplified in the present embodiment.

Referring to fig. 3-5, in the present embodiment, optionally, the transparent cover 600 has a through hole 610, and the cross-sectional profile of the transparent cover 600 is circular, where the cross-section is a plane perpendicular to the axis of the transparent cover 600. The transparent cover 600 has a first end face and a second end face opposite to each other in the axial direction thereof, and the first end face of the transparent cover 600 is provided with an annular groove 620 communicating with the through hole 610, that is, the annular groove 620 has an outer groove peripheral wall and a groove bottom wall, and the inner side communicates with the through hole 610, in other words, the longitudinal cross-section of the annular groove 620 is in the shape of an "L", and the longitudinal cross-section is a plane passing through the axis of the transparent cover 600. Meanwhile, an annular baffle 630 is disposed on the wall of the through hole 610, the annular baffle 630 is in a circular structure, the annular baffle 630 is located at one side of the bottom wall of the annular groove 620 far away from the notch, and a space is provided between the annular baffle 630 and the bottom wall of the groove in the axial direction of the transparent cover 600. The second end face of the transparent cover 600 is provided with a mounting groove 640, a framework oil seal 700 is mounted in the mounting groove 640, the framework oil seal 700 can be an inner-wrapping framework double-lip oil seal, and the design is that after the transparent cover 600 is sleeved outside the output shaft 200 by using a penetrating hole 610, the first end face of the transparent cover 600 is simultaneously abutted against the motor flange 100 and the outer ring 410, the transparent cover 600 can be fixed on the motor flange 100 by fasteners such as bolts, the transparent cover 600 and the motor flange 100 are fixed in the axial direction of the output shaft 200, the outer ring 410 is clamped and limited by the bearing 300 and the transparent cover 600, and the oil seal ring 400 is fixed in position in the axial direction of the output shaft 200. Meanwhile, the intermediate ring body 510 is located in the annular groove 620, the outer circumferential surface of the intermediate ring body 510 and the groove circumferential wall of the annular groove 620 have an annular gap, which may be referred to as a third gap 003, and the end surface of the intermediate ring body 510 and the groove bottom wall of the annular groove 620 have a gap therebetween, so that the intermediate ring body 510 and the annular groove 620 cooperate to form a labyrinth seal structure. The second ring 530 is inserted into the through hole 610, an annular space is formed between the second ring 530 and the wall of the through hole 610, and a space is formed between the end surface of the second ring 530 and the annular baffle 630 in the axial direction of the output shaft 200, and the space may be referred to as a third gap 003. In this way, the oil seal cover 500 is not directly in contact with the transparent cover 600, reducing frictional heat generation, and having little influence on the skeleton oil seal 700 mounted on the second end face.

Further, the shaft sleeve 800 is sleeved outside the output shaft 200, the shaft sleeve 800 is in interference fit with the output shaft 200, the shaft sleeve 800 is arranged in the annular baffle 630 in a penetrating mode, one end of the shaft sleeve 800 is abutted to the end face, far away from the first ring body 520, of the second ring body 530, the end face, far away from the second ring body 530, of the first ring body 520 is abutted to an annular step formed on the output shaft 200, and positioning of the axial position of the oil seal cover 500 is achieved. The annular barrier 630 is sleeved outside the sleeve 800, and an annular gap is formed between the inner circumferential surface of the annular barrier 630 and the outer circumferential surface of the sleeve 800, and may be referred to as a second gap 002. The framework oil seal 700 is sleeved outside the shaft sleeve 800, and plays a role in sealing a gap between the shaft sleeve 800 and the annular baffle 630. So design, skeleton oil blanket 700 is located the one side that overrunning clutch was kept away from to bearing 300, and skeleton oil blanket 700 receives under the temperature influence, long service life, simultaneously, is provided with oil seal cover 500, oil seal ring 400 and through lid 600 between skeleton oil blanket 700 and the bearing 300, forms seal structure through the cooperation of a plurality of parts, improves sealed effect through multiple seal structure design, improves seal structure's stability and reliability.

Optionally, the second gap 002 is an annular gap, and the single side size of the second gap 002 is set between 0.4mm and 0.6mm, for example, the single side size of the second gap 002 is set to 0.4mm, 0.5mm or 0.6mm, which is designed according to the requirement, and this embodiment is not listed one by one.

The rotary kiln auxiliary drive gear box sealing structure provided by the embodiment has at least the following advantages:

1. the labyrinth structure formed by a plurality of parts which are easy to process and manufacture can effectively ensure the shaft end seal of the speed reducer, prevent the seepage of internal lubricating oil and play a role in dust prevention, and improve the effectiveness and reliability of shaft end seal of the speed reducer;

2. the skeleton oil seal 700 is arranged at a position far away from the bearing 300 and the overrunning clutch, so that the oil seal can be effectively prevented from being aged and failed too early due to the influence of high temperature, and the service life of the skeleton oil seal 700 of the speed reducer can be prolonged;

3. the sealing structure can be suitable for the environmental working condition of rotary kiln equipment, and has good use effect at high temperature and high rotating speed.

The embodiment also provides a rotary kiln driving mechanism, which comprises the rotary kiln auxiliary transmission gear box sealing structure, and has the advantages of high sealing reliability, high use safety and the like.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. The utility model provides a rotary kiln auxiliary drive gear case seal structure which characterized in that includes:

2. The rotary kiln auxiliary transmission gearbox sealing structure according to claim 1, wherein:

the oil seal ring comprises an integrated outer ring and an annular inner plate, the annular inner plate is positioned in the outer ring and is coaxially arranged, and the annular inner plate is sleeved outside the output shaft; the part of the oil seal cover penetrates through the annular inner plate, and a first gap is formed between the outer peripheral surface of the oil seal cover and the inner peripheral surface of the annular inner plate.

3. The rotary kiln auxiliary transmission gear box sealing structure according to claim 2, characterized in that:

the oil seal cover comprises an integrated middle ring body, a first ring body and a second ring body, wherein the first ring body and the second ring body are positioned at two sides of the middle body, the outer peripheral surface of the middle ring body is simultaneously convexly arranged with the outer peripheral surface of the first ring body and the outer peripheral surface of the second ring body, the first ring body is penetrated into the annular inner plate, and the first gap is formed between the outer peripheral surface of the first ring body and the inner peripheral surface of the annular inner plate; the output shaft penetrates through the middle ring body, the first ring body and the second ring body at the same time.

4. A rotary kiln auxiliary drive gearbox sealing structure according to claim 3, wherein:

the transparent cover is provided with a penetrating hole, one end face of the transparent cover is provided with an annular groove communicated with the penetrating hole, the second ring body is inserted into the penetrating hole, the middle ring body is located in the annular groove, and the middle ring body and the annular groove jointly form a labyrinth sealing structure.

5. The rotary kiln auxiliary drive gearbox sealing structure according to claim 4, wherein:

the hole wall of the penetrating hole is convexly provided with an annular baffle plate, and the annular baffle plate is positioned at one side of the bottom wall of the annular groove; the output shaft is sleeved with a shaft sleeve, and the annular baffle is sleeved with the shaft sleeve and forms a second gap with the shaft sleeve; and a third gap is formed between the outer peripheral surface of the intermediate ring body and the peripheral wall of the annular groove.

6. The rotary kiln auxiliary drive gearbox sealing structure according to claim 5, wherein:

one side of the second ring body, which is far away from the first ring body, is abutted with one end face of the shaft sleeve.

7. The rotary kiln auxiliary drive gearbox sealing structure according to claim 6, wherein:

and a framework oil seal is arranged between the shaft sleeve and the transparent cover.

8. The rotary kiln auxiliary transmission gearbox sealing structure according to claim 1, wherein:

the motor flange is characterized in that a fixing hole is formed in the transparent cover, a fastener is arranged in the fixing hole in a penetrating mode, and the transparent cover is fixed on the motor flange by the fastener.

9. The rotary kiln auxiliary transmission gearbox sealing structure according to claim 1, wherein:

the first gap is set between 0.4mm and 0.6 mm.

10. A rotary kiln drive mechanism, comprising:

a rotary kiln auxiliary drive gearbox seal arrangement as claimed in any one of claims 1 to 9.