Tail wheel sealing structure of bucket elevator
By combining felt sealing components, bearing housing sealing components, and comb-tooth sealing components, the problem of poor sealing performance of the bucket elevator tail wheel is solved, achieving sealing follow-up and efficient dust blocking, extending the service life of the sealing components, and avoiding equipment damage and environmental pollution.
Patent Information
- Application Number
- CN202520126215.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-20
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-20
AI Technical Summary
The existing bucket elevator tail wheel structure has poor sealing performance, which leads to material leakage, affects equipment operating efficiency and the environment, and may also damage the tail wheel bearing.
The system employs a combination structure of felt sealing components, bearing housing sealing components, and comb-tooth sealing components. The felt sealing components are connected to the bearing housing housing, while the comb-tooth sealing components form a labyrinth seal structure to achieve sealing follow-up. Combined with a pre-tightening device, the compression of the sealing gasket is adjusted to enhance the sealing performance.
It effectively avoids damage to sealing components, improves sealing performance, reduces material leakage, extends service life, and prevents equipment damage and environmental pollution.
Smart Images
Figure CN223594975U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a bucket elevator tail wheel sealing structure. BACKGROUND
[0002] The prior art bucket elevator tail wheel structure adopts three seals, which are asbestos rubber plate seal, sealing seat skeleton seal and bearing seat skeleton seal. The bucket elevator tail wheel fluctuates up and down during operation. The sealing plate at the tail wheel fluctuates up and down with the tail shaft. The friction is large, the sealing plate is loose, a gap is generated between the sealing plate and the shell, powder leakage occurs, which is specifically manifested in:
[0003] 1. The asbestos rubber plate contacts and rubs against the box shell. With the up and down displacement of the tail shaft, the gasket wears and the elastic compensation gradually decreases, the sealing performance is lost, and material leaks from the asbestos rubber plate seal;
[0004] 2. The skeleton seal ring in contact seal form is subjected to radial load sealing failure due to the displacement of the shaft for a long time, and the material contact seal member rapidly wears the skeleton seal, causing sealing failure and material leakage;
[0005] If the sealing performance is poor, it will directly affect the conveying capacity and efficiency of the bucket elevator, and may cause the tail wheel bearing to be filled with powder, thereby damaging the equipment. At the same time, the leakage of superfine powder will cause environmental pollution and product waste, which will have a serious impact. UTILITY MODEL CONTENTS
[0006] The utility model solves the technical problem of providing a bucket elevator tail wheel sealing structure that can effectively achieve sealing, avoid frequent ash leakage, cause the tail wheel bearing to be filled with ash, affect the normal operation of the equipment, and pollute the environment;
[0007] The utility model solves the technical problem by adopting the following solutions:
[0008] A bucket elevator tail wheel sealing structure, comprising a felt sealing assembly sleeved on the outer side of the tail wheel shaft and connected with the equipment shell, a bearing seat sealing assembly located in the bearing seat and sleeved on the outer side of the tail wheel shaft, and a comb seal assembly arranged between the bearing seat shell and the felt sealing assembly and connected with the felt sealing assembly; the felt sealing assembly is connected with the bearing seat shell.
[0009] In some possible embodiments, the felt sealing assembly comprises a sealing plate sleeved on the outer side of the tail wheel shaft and located on the outer side of the equipment shell, a felt sealing gasket arranged between the sealing plate and the equipment shell and fixedly connected with the sealing plate, and a pre-tightening device connected with the equipment shell and used for adjusting the compression amount of the felt sealing gasket; the pre-tightening device is in abutting engagement with the side of the sealing plate away from the equipment shell; the sealing plate is connected with the bearing seat shell.
[0010] In some possible implementation manners, the pre-tightening device comprises a fixed plate mounted outside the sealing plate and connected with the equipment shell, and a pre-tightening bolt in threaded connection with the fixed plate and in abutting connection with the sealing plate at one end thereof; the axial direction of the pre-tightening bolt is arranged along the length direction of the tail wheel shaft.
[0011] In some possible implementation manners, the comb seal assembly comprises a static seal outer ring sleeved outside the tail wheel shaft and connected with the sealing plate, a dynamic seal inner ring sleeved outside the tail wheel shaft and forming a labyrinth seal structure with the static seal outer ring, and a first skeleton seal sleeved outside the tail wheel shaft and located between the static seal outer ring and the tail wheel shaft; the dynamic seal inner ring is in interference fit with the tail wheel shaft.
[0012] In some possible implementation manners, the inner side of the static seal outer ring is provided with an annular groove, the dynamic seal inner ring is located in the annular groove and forms an annular groove with the side of the annular groove away from the sealing plate, and the first skeleton seal is located in the annular groove.
[0013] In some possible implementation manners, the side of the annular groove away from the sealing plate is provided with an annular seal tooth, and the dynamic seal inner ring is provided with a tooth forming a labyrinth seal structure with the annular seal tooth; the annular seal tooth is located close to the side of the tail wheel shaft, the outer side of the tail wheel shaft and the dynamic seal.
[0014] In some possible implementation manners, the bearing seat shell is provided with a connecting plate; the connecting plate is connected with the sealing plate.
[0015] In some possible implementation manners, the connecting plate is provided with a waist-shaped hole, the long axis of the waist-shaped hole is arranged along the axial direction of the tail wheel shaft; the bearing seat shell is provided with a threaded hole in use with the waist-shaped hole; and the connecting plate is connected with the bearing seat shell through a bolt.
[0016] In some possible implementation manners, the waist-shaped holes are in multiple groups and arranged in parallel.
[0017] In some possible implementation manners, the bearing seat seal assembly and the first skeleton seal are both sealing rings.
[0018] Compared with the prior art, the utility model has the advantages of:
[0019] The cooperation of the felt seal assembly, the bearing seat seal assembly and the comb seal assembly 3 effectively realizes the sealing of the place, the felt seal assembly is connected with the bearing seat shell and the comb seal assembly respectively, so that the whole sealing structure can follow the displacement of the tail wheel shaft, the internal damage of the sealing assemblies is avoided, and the sealing performance is greatly improved.
[0020] The utility model discloses set up comb tooth sealing assembly, form a series of throttle gap and expansion cavity between annular sealing tooth and tooth, and dust medium will meet great resistance every through a sealing tooth, produce throttle effect and play a sealing role, and simultaneously according to the situation, form the pressure difference of the compressed air in the static sealing chamber formed between annular sealing tooth and tooth, under the action of pressure difference, can play good dust blocking effect, also can play the cooling of first skeleton sealing piece and the effect of reducing wear and prolonging service life to a certain extent,
[0021] The utility model discloses through the cooperation of sealing plate, felt sealing pad, pre -tightening device, can adjust the compression of felt sealing pad according to the sealing condition of felt sealing pad in use, ensure the sealing property, through felt sealing pad and sealing plate connection fixed, make can realize with the up and down displacement of tail shaft, thereby will not because friction deformation and fall off, cause the leakage,
[0022] The utility model discloses through connecting plate, static seal outer ring respectively with sealing plate connection, and use connecting plate and bearing seat connection, to effectively realize when tail shaft up and down displacement, felt sealing pad, sealing plate, comb tooth sealing assembly and bearing seat synchronous displacement, wherein comb tooth sealing assembly will not be extruded damage, greatly improve the service life. ACCOUT OF DRAWINGS
[0023] Fig. 1 It is structural diagram that the utility model is connected with tail wheel axle;
[0024] Fig. 2 It is connecting diagram of bearing seat shell, equipment shell, static seal outer ring, felt sealing assembly, connecting plate in the utility model;
[0025] Fig. 3 It is structural diagram of comb tooth sealing assembly, tail wheel axle in the utility model;
[0026] Among them: 10, equipment shell;20, bearing seat shell;30, tail wheel axle;1, felt sealing assembly;11, sealing plate;12, felt sealing pad;13, pre -tightening device;131, fixed plate;132, pre -tightening bolt;2, bearing seat sealing assembly;3, comb tooth sealing assembly;31, static seal outer ring;311, annular sealing tooth;32, dynamic seal inner ring;321, tooth;33, first skeleton sealing piece;4, connecting plate;41, waist type hole. DETAILED DESCRIPTION
[0027] In the utility model, unless another definite provision and limitation, the terms "mount", "link", "connect", "fix" and so on terms should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be directly connected, also can be indirectly connected through intermediate medium, can be two element inside's intercommunication or two element's mutual action relation.The "first", "second" and similar words mentioned in the application do not indicate any order, quantity or importance, but only distinguish different components.Similarly, "one" or "a" and similar words do not indicate quantity limit, but indicate that there is at least one.In the implementation of the application, the association relationship of the associated objects is described, which indicates that there can be three kinds of relationships, for example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone.In the description of the embodiments of the application, unless otherwise stated, the meaning of "a plurality of" is two or more than two.For example, a plurality of positioning columns refers to two or more than two positioning columns.The specific meaning of the above terms in the utility model can be understood according to specific circumstances by those skilled in the art.
[0028] The utility model will be explained in detail below.
[0029] As shown in the figure: Figs. 1-3
[0030] A tail wheel sealing structure of a bucket elevator, comprising a felt sealing assembly 1 sleeved outside a tail wheel shaft 30 and connected with a device shell 10, a bearing seat sealing assembly 2 located in a bearing seat and sleeved outside the tail wheel shaft 30, and a comb sealing assembly 3 arranged between the bearing seat shell 20 and the felt sealing assembly 1 and connected with the felt sealing assembly 1;The felt sealing assembly 1 is connected with the bearing seat shell 20.
[0031] The cooperation of the felt sealing assembly 1, the bearing seat sealing assembly 2 and the comb sealing assembly 3 effectively realizes the sealing of the place, the felt sealing assembly 1 is connected with the bearing seat shell 20 and the comb sealing assembly 3 respectively, so that the whole sealing structure can follow the up and down displacement of the tail wheel shaft 30, avoid the damage of the sealing assembly inside, and greatly improve the sealing performance.
[0032] In some possible embodiments, the felt sealing assembly 1 comprises a sealing plate 11 sleeved outside the tail wheel shaft 30 and located outside the device shell 10, a felt sealing pad 12 arranged between the sealing plate 11 and the device shell 10 and fixedly connected with the sealing plate 11, and a pre-tightening device 13 connected with the device shell 10 and used for adjusting the compression amount of the felt sealing pad 12;The pre-tightening device 13 is in abutting engagement with the side of the sealing plate 11 away from the device shell 10;The sealing plate 11 is connected with the bearing seat shell 20;
[0033] The sealing plate 11 is connected with the bearing housing 20, so that the felt sealing gasket 12 can be displaced up and down with the shaft, thereby preventing the felt sealing gasket 12 from being deformed and falling off due to friction, causing leakage and damaging the sealing performance;
[0034] Further, the felt sealing gasket 12 is connected with the sealing plate 11 by adhesion and rivets; the pre-tightening device 13 applies a force to the sealing plate 11 along the axis direction of the tail wheel shaft 30, so that the felt sealing gasket 12 on the sealing plate 11 is pressed, thereby adjusting the compression amount of the felt sealing gasket 12 and effectively ensuring the sealing performance;
[0035] In some possible embodiments, in order to effectively apply a force to the sealing plate 11 by the pre-tightening device 13 to adjust the compression amount of the felt sealing gasket 12, the pre-tightening device 13 includes a fixed plate 131 mounted on the outside of the sealing plate 11 and connected with the equipment housing 10, and a pre-tightening bolt 132 screwed with the fixed plate 131 and abutting against the sealing plate 11 at one end; the axial direction of the pre-tightening bolt 132 is arranged along the length direction of the tail wheel shaft 30.
[0036] Specifically, a gap is formed between the fixed plate 131 and the sealing plate 11, and the two are not connected; the fixed plate 131 is fixedly connected with the equipment housing 10 by welding or screwing; by screwing the pre-tightening bolt 132, the end of the pre-tightening bolt 132 close to the sealing plate 11 moves to one side of the sealing plate 11 and abuts against the sealing plate 11; in the case that the equipment housing 10 is fixed, the distance between the sealing plate 11 and the equipment housing 10 is controlled, thereby adjusting the compression amount of the felt sealing gasket 12.
[0037] In some possible embodiments, the comb seal assembly 3 includes a static sealing outer ring 31 sleeved on the outside of the tail wheel shaft 30 and connected with the sealing plate 11, a dynamic sealing inner ring 32 sleeved on the outside of the tail wheel shaft 30 and cooperating with the static sealing outer ring 31 to form a labyrinth sealing structure, and a first skeleton seal 33 sleeved on the outside of the tail wheel shaft 30 and located between the static sealing outer ring 31 and the tail wheel shaft 30; the dynamic sealing inner ring 32 is in interference fit with the tail wheel shaft 30 and rotates with the tail wheel shaft 30; the static sealing outer ring is fixed with the sealing plate 11 by M12 bolts; the labyrinth sealing structure is formed by the zigzag gap between the static sealing outer ring 31 and the dynamic sealing inner ring 32; the labyrinth sealing structure produces a throttling effect to reduce the leakage surface and achieve sealing; at the same time, the static sealing cavity formed by the static sealing outer ring 31 and the dynamic sealing inner ring 32 forms a pressure difference by increasing the micro-positive pressure air to block dust from entering the seal.
[0038] The first skeleton seal 33 adopts a contact form to effectively block the entry and exit of internal and external dust objects.
[0039] Since the static sealing outer ring 31 is connected with the sealing plate 11, the sealing plate 11 is connected with the bearing housing 20, and the dynamic sealing inner ring 32 is sleeved on the outside of the tail wheel shaft 30 and is in interference fit, when the tail wheel shaft 30 moves up and down, the static sealing outer ring 31 and the dynamic sealing inner ring 32 will move synchronously, so as to avoid damage of the first skeleton sealing element 33, the static sealing outer ring 31 and the dynamic sealing inner ring 32 caused by extrusion, and damage of the sealing performance.
[0040] In some possible embodiments, the inside of the static sealing outer ring 31 is provided with an annular groove, the dynamic sealing inner ring 32 is located in the annular groove and forms an annular groove with the side of the annular groove away from the sealing plate 11, and the first skeleton sealing element 33 is located in the annular groove.
[0041] In some possible embodiments, the side of the annular groove away from the sealing plate 11 is provided with an annular sealing tooth 311, and the dynamic sealing inner ring 32 is provided with a tooth 321 cooperating with the annular sealing tooth 311 to form a labyrinth sealing structure; the annular sealing tooth 311 is close to the side of the tail wheel shaft 30, the outside of the tail wheel shaft 30 and the dynamic sealing to form the annular groove.
[0042] Further, the plurality of annular sealing teeth 311 and the plurality of teeth 321 are mutually embedded and inserted, and the adjacent annular sealing teeth 311 and teeth 321 form gaps, the teeth 321 and the annular sealing teeth 311 are relatively rotated and do not interfere with each other, and dust medium will encounter great resistance and produce throttling effect to play a sealing role when passing through each sealing tooth 321. In use, 0.05-0.1MPA compressed air can be added in the static sealing chamber formed by the plurality of annular sealing teeth 311 and the plurality of teeth 321 according to the use requirement, and under the action of pressure difference, good dust blocking effect can be achieved, and the first skeleton sealing element 33 can be cooled and the wear can be reduced to prolong the service life.
[0043] In some possible embodiments, in order to effectively realize the connection of the sealing plate 11 and the bearing housing 20, a connecting plate 4 is installed on the bearing housing 20; the connecting plate 4 is connected with the sealing plate 11.
[0044] The connecting plate 4 is L-shaped, including a vertical plate connected with the sealing plate 11 and a horizontal plate connected with the bearing housing 20.
[0045] In some possible implementation manners, a waist-shaped hole 41 is arranged on the connecting plate 4, a long axis of the waist-shaped hole 41 is arranged along an axis direction of the tail wheel shaft 30; a threaded hole matched with the waist-shaped hole 41 is arranged on the bearing housing; the connecting plate 4 is connected with the bearing housing through a bolt; and the waist-shaped hole 41 is arranged on the cross plate. By arranging the waist-shaped hole 41, the position of the connecting plate 4 relative to the sealing plate 11 and the bearing housing 20 can be effectively adjusted, so that the assembly is more convenient.
[0046] In some possible implementation manners, the waist-shaped holes 41 are in multiple groups and are arranged in parallel.
[0047] In some possible implementation manners, the bearing housing sealing assembly 2 and the first skeleton sealing piece 33 are both sealing rings.
[0048] The utility model is not limited to the foregoing specific embodiments. The utility model extends to any new feature or any new combination disclosed in the specification, and any new method or process step or any new combination disclosed.
Claims
1. A dragline tail wheel seal structure, characterised by, The sealing assembly comprises a felt sealing assembly sleeved outside the tail wheel shaft and connected with the equipment shell, a bearing seat sealing assembly located inside the bearing seat and sleeved outside the tail wheel shaft, and a comb seal assembly arranged between the bearing seat shell and the felt sealing assembly and connected with the felt sealing assembly; the felt sealing assembly is connected with the bearing seat shell.
2. The sealing structure for the tail wheel of a bucket elevator according to claim 1, characterized in that, The felt sealing assembly comprises a sealing plate sleeved outside the tail wheel shaft and located outside the equipment shell, a felt sealing gasket arranged between the sealing plate and the equipment shell and fixedly connected with the sealing plate, and a pre-tightening device connected with the equipment shell and used for adjusting the compression amount of the felt sealing gasket; the pre-tightening device is in abutting engagement with the sealing plate away from the side of the equipment shell; the sealing plate is connected with the bearing seat shell.
3. The sealing structure for the tail wheel of a bucket elevator according to claim 2, characterized in that, The pre-tightening device comprises a fixed plate mounted outside the sealing plate and connected with the equipment shell, and a pre-tightening bolt in screwing engagement with the fixed plate and in abutting engagement with the sealing plate at one end and passing through the fixed plate; the axial direction of the pre-tightening bolt is arranged along the length direction of the tail wheel shaft.
4. The seal structure for the tail wheel of a bucket elevator according to claim 2, wherein The comb seal assembly comprises a static seal outer ring sleeved outside the tail wheel shaft and connected with the sealing plate, a dynamic seal inner ring sleeved outside the tail wheel shaft and forming a labyrinth seal structure in cooperation with the static seal outer ring, and a first skeleton seal located between the static seal outer ring and the tail wheel shaft and sleeved outside the tail wheel shaft; the dynamic seal inner ring is in interference fit with the tail wheel shaft.
5. The sealing structure for the tail wheel of a bucket elevator according to claim 4, characterized in that, The inner side of the static seal outer ring is provided with an annular groove, the dynamic seal inner ring is located in the annular groove and forms an annular groove with the side of the annular groove away from the sealing plate, and the first skeleton seal is located in the annular groove.
6. The sealing structure for the tail wheel of a bucket elevator according to claim 5, characterized in that, The side of the annular groove away from the sealing plate is provided with an annular sealing tooth, and the dynamic seal inner ring is provided with a tooth forming a labyrinth seal structure in cooperation with the annular sealing tooth; the side of the annular sealing tooth close to the tail wheel shaft, the outer side of the tail wheel shaft and the dynamic seal cooperation form the annular groove.
7. A seal for an undercarriage of a bucket elevator according to any one of claims 1-6, characterized in that, A connecting plate is mounted on the bearing seat shell; the connecting plate is connected with the sealing plate.
8. The sealing structure for the tail wheel of a bucket elevator according to claim 7, characterized in that, A waist-shaped hole is arranged on the connecting plate, and the long axis of the waist-shaped hole is arranged along the axial direction of the tail wheel shaft; a threaded hole is arranged on the bearing seat shell and used in cooperation with the waist-shaped hole; the connecting plate is connected with the bearing seat shell through bolts.
9. A sealing structure for the tail wheel of a bucket elevator according to claim 8, characterized in that, The waist-shaped holes are arranged in multiple groups and in parallel.
10. A seal for a tail wheel of an elevator bucket according to any one of claims 4-6, characterized in that The bearing seat sealing assembly and the first skeleton seal are both sealing rings.