CN211715728U

CN211715728U - Compound seal structure of gear box

Info

Publication number: CN211715728U
Application number: CN202020014829.8U
Authority: CN
Inventors: 尤畅; 孙雪妮; 刘梅
Original assignee: Shaanxi Zhongda Liding Technology Co ltd
Current assignee: Shaanxi Zhongda Liding Technology Co ltd
Priority date: 2020-01-06
Filing date: 2020-01-06
Publication date: 2020-10-20
Anticipated expiration: 2030-01-06

Abstract

The utility model provides a composite sealing structure of a gear box, which adopts a combined mode of three sealing forms to seal a spiral gear box, wherein the first sealing mode is mechanical labyrinth sealing, and a plurality of sealing rings, a protection ring and an annular groove are mutually matched to form an ultra-long sealing path to form a first resealing of the gear box; the second sealing mode is a second mechanical labyrinth seal which is composed of the joint of the driving disc, the protection ring, the floating seal ring and the flange disc to form a second reseal seal of the gear box; the third sealing mode is composed of a floating seal ring and a sealing ring to form the third triple seal of the gear box. The combined type sealing structure is formed by mutually combining the triple sealing modes, the spiral gear box is sealed in an all-round and accurate mode, a clean, safe and reliable working environment is provided for the gear box, the sealing performance of the gear box body is guaranteed, and the failure rate of equipment is further reduced.

Description

Compound seal structure of gear box

Technical Field

The utility model belongs to the mechanical equipment field of building the road, concretely relates to compound seal structure of gear box, the sealing of specially adapted screw feeder gear box.

Background

Generally, the working environment of the screw conveyor gearbox is relatively harsh, for example, the screw conveyor gearbox works in a cement stabilized soil or asphalt environment, however, because a large amount of fine sand grains, cement and other substances exist in the cement stabilized soil, and high-temperature asphalt, fine particles and the like exist in the asphalt sand grains, the sealing effect is often poor due to the traditional sealing ring, so that the fine sand grains, the cement, the high-temperature asphalt and the fine particles enter a floating oil seal of the gearbox, the sealing ring and the floating ring of the gearbox are damaged, oil leakage of the gearbox is caused, even the gearbox is lack of lubricating oil, the bearing or the gear is damaged, the service life of the gearbox is seriously influenced, and the maintenance and replacement cost is increased.

Under the current environment with high quality and short construction period, the road building requirement is high, the fault rate of the gear box caused by the sealing problem is high, and the development, popularization and application of the road building equipment are seriously restricted.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a composite sealing structure of a gear box, which aims to solve the problem that a sealing ring and a floating ring of the gear box are damaged due to poor sealing effect of the traditional sealing mode; the problem that the fault rate of the gearbox is high due to poor sealing effect of a traditional sealing mode is solved.

In order to solve the technical problem, the utility model provides a compound seal structure of gear box, at least, the power distribution box comprises a box body, still include axial center line coincidence and fixed connection's gear and the driving-disc that has the hoop flange, the cover is equipped with the protection ring on the flange of driving-disc, the cover is equipped with the ring flange on the wheel hub of gear, the terminal surface of ring flange is connected with the terminal surface fixed hugging closely of protection ring, ring flange fixed mounting is in the terminal surface of box, the gear is arranged in the box, set up the annular groove to the inner ring surface of protection ring along the flange outer periphery of driving-disc, the annular groove endotheca has a plurality of sealing rings, the sealing ring and the;

the inner wall of the flange of the driving disk and the inner wall of the inner ring of the flange form an annular cavity, two floating seal rings are sleeved in the annular cavity, a seal ring is arranged between one of the floating seal rings and the inner wall of the flange of the driving disk, and the other seal ring is arranged between the other floating seal ring and the inner wall of the inner ring of the flange.

Furthermore, the number of the sealing rings is three, the sealing rings are respectively a first sealing ring, a second sealing ring and a third sealing ring which are tightly attached and contacted with each other along the power transmission direction, the outer ring surface of the first sealing ring is tightly attached to the inner ring surface of the protection ring, and a first annular cavity is formed by the inner ring surface of the first sealing ring and the groove bottom of the annular groove opposite to the inner ring surface; the inner ring surface of the second sealing ring is tightly attached to the groove bottom of the annular groove, and a second annular cavity is formed by the outer ring surface of the second sealing ring and the inner ring surface of the protection ring opposite to the outer ring surface of the second sealing ring; the outer ring surface of the third sealing ring is tightly attached to the inner ring surface of the protection ring, and a third annular cavity is formed by the inner ring surface of the third sealing ring and the groove bottom of the annular groove opposite to the inner ring surface of the third sealing ring.

Preferably, each sealing ring all has two parallel and relative terminal surfaces, along power transmission direction, right-hand member anchor ring and left end anchor ring respectively, the right-hand member anchor ring of first sealing ring hugs closely the contact with the annular side of annular groove and forms sealed face C face, the left end anchor ring of first sealing ring hugs closely the contact with the right-hand member anchor ring of second sealing ring and forms sealed face B face, the left end anchor ring of second sealing ring hugs closely the contact with the right-hand member anchor ring of third sealing ring and forms sealed face A face, there is the clearance in the left end anchor ring of third sealing ring and the annular side of annular groove.

Further, the first seal ring and the third seal ring have the same structure, and the diameter of either one of the first seal ring and the third seal ring is larger than that of the second seal ring.

Preferably, the first annular cavity, the second annular cavity and the third annular cavity are identical in structure.

Furthermore, the composite sealing structure of the gear box also comprises a second mechanical labyrinth seal which is composed of the joints of the driving disc, the protection ring, the floating seal ring and the flange disc.

The utility model has the advantages as follows:

the utility model adopts a combined mode of three sealing modes to seal the spiral gearbox, the first sealing mode is mechanical labyrinth sealing, and a plurality of sealing rings, a protection ring and an annular groove are mutually matched to form an ultra-long sealing path to form a first heavy seal of the gearbox; the second sealing mode is a second mechanical labyrinth seal which is composed of the joint of the driving disc, the protection ring, the floating seal ring and the flange disc to form a second reseal seal of the gear box; the third sealing mode is composed of a floating seal ring and a sealing ring to form the third triple seal of the gear box. Above triple sealing means intercombination forms combined type seal structure, carries out all-round accurate sealing to spiral gear box, and the sealed face of overlength provides a clean safe and reliable's operational environment for the gear box, guarantees gear box body sealing performance, and then reduces equipment failure rate, and each seal structure repeatedly detachable uses in addition practices thrift manufacturing cost, and with current spare part commonality good, need not independent increase and decrease spare part.

In order to make the above and other objects of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

FIG. 1 is a schematic structural view of a composite seal structure of a gearbox.

Fig. 2 is a partially enlarged view of fig. 1 at D.

Description of reference numerals:

1. a drive disc; 2. a seal ring; 3. a guard ring; 4. a floating seal ring; 5. a flange plate; 6. a seal ring; 7. a gear; 8. an annular groove; 9. a first ring cavity; 10. a second ring cavity; 11. a third ring cavity; 12. a sealing surface C surface; 13. a sealing surface B surface; 14. a sealing surface A surface; 15. a second mechanical labyrinth seal; 16. a box body;

601. a first seal ring; 602. a second seal ring; 603. and a third seal ring.

Detailed Description

The following description is provided for illustrative embodiments of the present invention, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.

In the present invention, the upper, lower, left and right in the drawings are regarded as the upper, lower, left and right of the composite sealing structure of the gear box described in this specification.

The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, which, however, may be embodied in many different forms and are not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the invention to those skilled in the art. The terminology used in the exemplary embodiments presented in the accompanying drawings is not intended to be limiting of the invention. In the drawings, the same units/elements are denoted by the same reference numerals.

Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.

The first embodiment:

referring to fig. 1, a first embodiment of the present invention relates to a composite sealing structure of a gear box, at least comprises a box 16, a gear 7 and a driving disk 1, wherein the gear 7 and the driving disk 1 are axially overlapped and fixedly connected, the driving disk 1 is provided with a protection ring 3, a flange 5 is sleeved on a hub of the gear 7, the end surface of the flange 5 is fixedly attached to the end surface of the protection ring 3, the flange 5 is fixedly installed on the end surface of the box 16, the gear 7 is arranged in the box 16, an annular groove 8 facing to the inner annular surface of the protection ring 3 is arranged along the outer circumferential surface of the flange of the driving disk 1, a plurality of sealing rings 6 are sleeved in the annular groove 8, the sealing rings 6 and the groove wall of the annular groove 8, and the inner annular surface;

the inner wall of the flange of the driving disk 1 and the inner wall of the inner ring of the flange 5 form an annular cavity, two floating seal rings 4 are sleeved in the annular cavity, a seal ring 2 is arranged between one of the floating seal rings 4 and the inner wall of the flange of the driving disk 1, and another seal ring 2 is arranged between the other floating seal ring 4 and the inner wall of the inner ring of the flange 5.

In the above configuration, the axial center line of the drive disk 1, the axial center line of the guard ring 3, the axial center line of the flange 5, and the axial center line of the gear 7 are overlapped.

The working principle of the composite sealing structure of the gear box in the embodiment is as follows:

multistage power is sequentially transmitted to a gear 7, the gear 7 drives a driving disc 1 to rotate, the driving disc 1 transmits the power to a spiral distributor connected with the driving disc 1 to provide power for the spiral distributor, the spiral distributor transmits materials (asphalt or cement paste and the like) to the next process, in the process, the driving disc 1 is buried or fully buried by the materials, the materials of accessories of the driving disc 1 are stirred along with the rotation of blades of the spiral distributor to cause the movement of the materials, such as the movement into a gear box providing power for the materials, at the moment, the first mechanical labyrinth seal is used as a first heavy seal to block the splashed materials, even if the materials enter the first mechanical labyrinth seal from gaps, the path of the materials entering the gear box can be prolonged by an overlong sealing surface of the first mechanical labyrinth seal to be used as a second heavy seal of the gear box, and the floating seal ring 4 and the sealing ring 2 can also block the entering of the materials at the moment, the double-seal protection gear box is formed by the double-seal protection gear box and the first mechanical labyrinth seal, so that the gear box is prevented from being subjected to the image of external impurities, and the sealing effect of the gear box is improved.

Specifically, because the protection ring 3 is fixedly connected with the flange 5, and the flange 5 is fixed on the box 16, when the gear 7 drives the driving disc 1 to rotate, the protection ring 3 and the flange 5 do not rotate (are stationary), the driving disc 1 stirs the material through the spiral distributor connected with the driving disc 1 in the rotating process, the material is blocked outside the box 16 by the first mechanical labyrinth seal, the material is prevented from entering the box 16 to cause the damage or even failure of the parts in the box 16, and the box 16 and the internal structure thereof are effectively protected.

It should be noted that, the drive disc 1 and the guard ring 3 are not assembled and not contacted, only the flange of the drive disc 1 extends into the guard ring 3; likewise, the gear 7 is not in fitted relationship with the flange 5, but only the hub of the gear 7 extends into the flange 5.

Second embodiment:

the embodiment relates to a composite sealing structure of a gear box, and the composite sealing structure at least comprises a box body 16, a gear 7 and a driving disk 1, wherein the gear 7 and the driving disk 1 are overlapped and fixedly connected by an axial central line, the driving disk 1 is provided with an annular flange, a protection ring 3 is sleeved on the flange of the driving disk 1, a flange plate 5 is sleeved on a hub of the gear 7, the end surface of the flange plate 5 is fixedly attached to the end surface of the protection ring 3, the flange plate 5 is fixedly arranged on the end surface of the box body 16, the gear 7 is arranged in the box body 16, an annular groove 8 which is right opposite to the inner annular surface of the protection ring 3 is arranged on the outer circumferential surface of the flange of the driving disk 1, a plurality of sealing rings 6 are;

Referring to fig. 2, the number of the seal rings 6 is three, and the three seal rings are respectively a first seal ring 601, a second seal ring 602 and a third seal ring 603 which are tightly attached and contacted with each other along the power transmission direction, the outer ring surface of the first seal ring 601 is tightly attached to the inner ring surface of the protection ring 3, and the inner ring surface of the first seal ring 601 and the groove bottom of the ring-shaped groove 8 which is opposite to the inner ring surface form a first ring-shaped cavity 9; the inner ring surface of the second sealing ring 602 is tightly attached to the groove bottom of the annular groove 8, and the outer ring surface of the second sealing ring 602 and the inner ring surface of the protection ring 3 opposite to the outer ring surface form a second annular cavity 10; the outer ring surface of the third sealing ring 603 is tightly attached to the inner ring surface of the protection ring 3, and the inner ring surface of the third sealing ring 603 and the groove bottom of the ring-shaped groove 8 opposite to the inner ring surface form a third ring-shaped cavity 11.

As shown in fig. 2, each sealing ring 6 has two parallel and opposite end surfaces, which are respectively a right end ring surface and a left end ring surface along the power transmission direction, the right end ring surface of the first sealing ring 601 is in close contact with the annular side surface of the annular groove 8 to form a sealing surface C surface 12, the left end ring surface of the first sealing ring 601 is in close contact with the right end ring surface of the second sealing ring 602 to form a sealing surface B surface 13, the left end ring surface of the second sealing ring 602 is in close contact with the right end ring surface of the third sealing ring 603 to form a sealing surface a surface 14, and a gap exists between the left end ring surface of the third sealing ring 603 and the annular side surface of the annular groove 8.

Along the path of the material or impurities entering the gearbox, the first mechanical labyrinth seal comprises the following structure: third annular cavity 11 → sealing surface a face 14 → second annular cavity 10 → sealing surface B face 13 → first annular cavity 9 → sealing surface C face 12.

Specifically, if material or impurities enter the gear box, the material or impurities enter the annular groove 8, namely, a gap between the left end annular surface of the third sealing ring 603 and the annular side surface of the annular groove 8, and then move according to the sequence of the third annular cavity 11 → the sealing surface a surface 14 → the second annular cavity 10 → the sealing surface B surface 13 → the first annular cavity 9 → the sealing surface C surface 12, but the above components are all a layer of annular seal, and the sealing surfaces of each component are overlong, so that the above components are combined with each other to form a longer sealing path to block or intercept the impurities from entering the gear box.

In this embodiment, above first mechanical labyrinth seals and floats seal ring 4 and sealing washer 2 constitution double seal, and the combined action provides the double seal guarantee for the gear box, and simultaneously, first mechanical labyrinth seals provides a clean safe and reliable's operational environment for floating seal ring 4 and sealing washer 2, guarantees gearbox casing sealing performance, reduces equipment failure rate, and the extension is maintained the maintenance cycle, reduces after-sales service cost.

Because the first mechanical labyrinth seal is formed by sleeving the plurality of sealing rings 6 outside the driving disc 1, the first mechanical labyrinth seal is very convenient to install or disassemble and can be repeatedly disassembled and used, and the production cost is saved.

The structure is good with current spare part commonality more, need not to increase and decrease spare part alone.

The third embodiment:

in addition to the above embodiments, referring to fig. 1 or 2, the first seal ring 601 and the third seal ring 603 preferably have the same structure, and either one of the first seal ring and the third seal ring has a larger diameter than the second seal ring 602.

Preferably, the first annular chamber 9, the second annular chamber 10 and the third annular chamber 11 are of identical construction.

On the basis of double sealing formed by the first mechanical labyrinth seal, the floating seal ring 4 and the sealing ring 2, the gear box compound sealing structure also comprises a second mechanical labyrinth seal 15 which is formed by the connecting parts of the driving disc 1, the protection ring 3, the floating seal ring 4 and the flange disc 5.

If the spiral distributor is buried or fully buried by materials, the materials can be moved due to the rotation stirring of the blades of the spiral distributor, for example, the materials move into a gear box which provides power for the spiral distributor, at the moment, the first mechanical labyrinth seal serves as a first heavy seal and can block the splashed materials, and even if the materials enter the first mechanical labyrinth seal from a gap, the overlong sealing surface of the first mechanical labyrinth seal can prolong the path of the materials entering the gear box; the second reseal of the gear box is a second mechanical labyrinth seal 15 which is formed by connecting a cavity formed by the connection of the inner ring surface of the protection ring 3, the outer ring surface of the flange of the driving disk 1 and the right end ring surface of the first sealing ring 601, a cavity formed by the right end ring surface of the flange of the driving disk 1 and the left end ring surface of the flange 5, a cavity formed by the connection of the inner ring surface of the flange of the driving disk 1, the left end ring surface of the flange 5 and the outer ring surfaces of the two floating sealing rings 4; the third is sealed then to be become by floating seal ring 4 and sealing washer 2, specifically, floats seal ring 4 and sealing washer 2 and also can block the entering of material this moment, and it forms double seal protection gear box with first mechanical labyrinth seal promptly, avoids the gear box to receive the image of external impurity, improves the sealed effect of gear box.

To sum up, triple seal mutually supports and constitutes combined type seal structure, and combined action protection gear box carries out all-round accurate seal to spiral gear box, and the sealed face of overlength provides a clean safe and reliable's operational environment for the gear box, guarantees gear box sealing performance, and then reduces equipment failure rate, and each seal structure repeatedly dismantles the use in addition, practices thrift manufacturing cost, and with current spare part commonality good, need not to increase and decrease spare part alone.

It will be understood by those skilled in the art that the foregoing embodiments are specific examples of the invention, and that various changes in form and details may be made therein without departing from the spirit and scope of the invention in its practical application.

Claims

1. The utility model provides a compound seal structure of gear box, includes box (16) at least, still includes axial direction line coincidence and fixed connection's gear (7) and has drive-disc (1) of hoop flange, and the cover is equipped with protection ring (3) on the flange of drive-disc (1), and the cover is equipped with ring flange (5) on the wheel hub of gear (7), and the terminal surface of ring flange (5) is hugged closely with the terminal surface of protection ring (3) is fixed to be connected, ring flange (5) fixed mounting is in the terminal surface of box (16), and box (16) are arranged in gear (7), its characterized in that: an annular groove (8) which is right opposite to the inner annular surface of the protection ring (3) is formed in the outer circumferential surface of the flange of the driving disc (1), a plurality of sealing rings (6) are sleeved in the annular groove (8), and the sealing rings (6), the groove walls of the annular groove (8) and the inner annular surface of the protection ring (3) form a first mechanical labyrinth seal;

the inner wall of the flange of the driving disk (1) and the inner wall of the inner ring of the flange plate (5) form an annular cavity, two floating seal rings (4) are sleeved in the annular cavity, a sealing ring (2) is arranged between one of the floating seal rings (4) and the inner wall of the flange of the driving disk (1), and another sealing ring (2) is arranged between the other floating seal ring (4) and the inner wall of the inner ring of the flange plate (5).

2. The gearbox composite seal structure of claim 1, wherein: the number of the sealing rings (6) is three, the sealing rings are respectively a first sealing ring (601), a second sealing ring (602) and a third sealing ring (603) which are in close contact with each other along the power transmission direction, the outer ring surface of the first sealing ring (601) is in close contact with the inner ring surface of the protection ring (3), and the inner ring surface of the first sealing ring (601) and the groove bottom of the annular groove (8) opposite to the inner ring surface form a first annular cavity (9); the inner ring surface of the second sealing ring (602) is tightly attached to the groove bottom of the annular groove (8), and a second annular cavity (10) is formed by the outer ring surface of the second sealing ring (602) and the inner ring surface of the protection ring (3) opposite to the outer ring surface; the outer ring surface of the third sealing ring (603) is tightly attached to the inner ring surface of the protection ring (3), and a third annular cavity (11) is formed by the inner ring surface of the third sealing ring (603) and the groove bottom of the annular groove (8) opposite to the inner ring surface.

3. The gearbox composite seal structure of claim 2, wherein: each sealing ring (6) is provided with two parallel and opposite end faces, and the two end faces are a right end ring face and a left end ring face respectively along the power transmission direction, the right end ring face of the first sealing ring (601) is tightly attached to and contacted with the annular side face of the annular groove (8) to form a sealing face C face (12), the left end ring face of the first sealing ring (601) is tightly attached to and contacted with the right end ring face of the second sealing ring (602) to form a sealing face B face (13), the left end ring face of the second sealing ring (602) is tightly attached to and contacted with the right end ring face of the third sealing ring (603) to form a sealing face A face (14), and a gap exists between the left end ring face of the third sealing ring (603) and the annular side.

4. The gearbox composite seal structure of claim 2, wherein: the first sealing ring (601) and the third sealing ring (603) are identical in structure, and the diameter of either one of the first sealing ring and the third sealing ring is larger than that of the second sealing ring (602).

5. The gearbox composite seal structure of claim 2, wherein: the first annular cavity (9), the second annular cavity (10) and the third annular cavity (11) are identical in structure.

6. A gearbox composite sealing structure as defined in any one of claims 1-5, characterized in that: the mechanical labyrinth seal also comprises a second mechanical labyrinth seal (15) which is composed of the joint of the driving disk (1), the protection ring (3), the floating seal ring (4) and the flange disk (5).