Walking speed reducer sealing structure, walking speed reducer and mining machinery

Abstract

The invention discloses a walking speed reducer sealing structure, a walking speed reducer and mining machinery, and the walking speed reducer sealing structure comprises a fixed flange fixed on a machine base; the output flange is connected with the fixed flange; the sealing unit is mounted between the fixed flange and the output flange and comprises a first sealing unit, a second sealing unit and a third sealing unit, the first sealing unit comprises a first sealing strip, a pushing part, an elastic element and a first sealing seat, the pushing part is mounted on the fixed flange, the elastic element is fastened on the first sealing strip through the pushing part, and the elastic element is fastened on the second sealing strip through the pushing part; the first sealing strip is installed on the first sealing seat and the fixed flange, the first sealing seat is installed on the output flange, the second sealing unit adopts a labyrinth sealing assembly, the third sealing unit adopts any one of a floating sealing assembly, a framework sealing assembly and a lip-type sealing assembly, and the sealing units are used for enabling the walking speed reducer to meet the slurry working condition. The walking speed reducer has the protection function under the slurry working condition, and normal use of the walking speed reducer under the slurry working condition can be guaranteed.

Description

Technical Field

[0001] The invention relates to a travel reducer sealing structure, a travel reducer and mining machinery, and belongs to the technical field of reducers. Background Art

[0002] Travel reducers are track drive mechanisms that work in very harsh conditions. Damage to the seal at the output part is one of the main faults of travel reducers. Common travel reducer seals include: floating seals, labyrinth seals + floating seals, labyrinth seals + skeleton seals, etc. The above sealing methods have satisfactory sealing effects for ordinary dust, water vapor, etc. When encountering mud conditions, under the action of gravity, mud with high water content and strong fluidity will be immersed and adhered to the floating seal or skeleton seal surface. After the water evaporates, the mud will harden into mud and sand blocks. After the mud and sand blocks break and roll, they will open the sealed rubber parts and enter the interior of the travel reducer, causing internal oil to leak out. The external manifestations of seal damage are oil leakage and abnormal noise in the reducer. After disassembly, there will be mud and sand inside the box, lack of oil, damage to the output bearing, scratches or broken teeth on the gears, and other problems. Summary of the invention

[0003] In view of the problems existing in the above-mentioned prior art, the present invention provides a travel reducer sealing structure, a travel reducer and a mining machinery, which have the basic functions of a travel reducer and at the same time have the protection function of mud working conditions, thereby ensuring the normal use of the travel reducer under mud working conditions.

[0004] In order to achieve the above object, the present invention adopts a travel reducer sealing structure, comprising:

[0005] Fixed flange, fixed on the machine base;

[0006] An output flange is connected to the fixed flange, and a speed reducing part for speed reducing and torque increasing function is provided between the output flange and the fixed flange;

[0007] A sealing unit is installed between the fixed flange and the output flange, and the sealing unit includes a first sealing unit, a second sealing unit and a third sealing unit. The first sealing unit includes a first sealing strip, a push piece, an elastic element and a first sealing seat. The push piece is installed on the fixed flange, and the elastic element is fastened to the first sealing strip by the push piece. The first sealing strip is installed on the first sealing seat and the fixed flange, and the first sealing seat is installed on the output flange. The second sealing unit adopts a labyrinth sealing assembly, and the third sealing unit adopts any one of a floating sealing assembly, a skeleton sealing assembly, and a lip-type sealing assembly. The sealing unit is used to enable the travel reducer to meet the use requirements of mud working conditions.

[0008] In some embodiments, a sealing groove for installing the first sealing strip is provided on the fixed flange, and a plurality of push holes a for installing a push piece are evenly provided at the bottom of the sealing groove along the circumference, and the push piece is fixed by a locking piece.

[0009] In some embodiments, the first sealing strip slides axially in the sealing groove, and a radial gap between the first sealing strip and the sealing groove is 0.05-0.2 mm.

[0010] In some embodiments, a plurality of push holes b for installing elastic elements and push pieces are provided along the circumferential direction on one side of the first sealing strip facing the fixed flange.

[0011] In some embodiments, the second sealing unit includes a labyrinth seal a installed on the fixed flange and a labyrinth seal b installed on the output flange, and the radial clearance between the labyrinth seal a and the labyrinth seal b is 1-3 mm, and the axial clearance is 2-5 mm.

[0012] In some embodiments, the third sealing unit includes a second seal, a second sealing seat a installed on the fixed flange, and a second sealing seat b installed on the output flange, and the second seal is installed on the second sealing seat a and the second sealing seat b.

[0013] In some embodiments, a cover is installed on the machine base via a cover fixing member, a cover hole is opened on the cover, and a cover fixing hole matching with the cover hole is opened on the machine base.

[0014] In some embodiments, a maintenance hole is also provided on the base.

[0015] In some embodiments, a sealing groove for installing a first sealing strip is provided on the first sealing seat, a plurality of fixing countersunk holes are provided at the bottom of the sealing groove, and fixing holes for fixing the first sealing seat on the output flange are provided at the bottom of the fixing countersunk holes.

[0016] In some embodiments, a sealing seat hole for installing the first sealing seat is provided on the output flange, and a plurality of sealing seat fixing holes for fixing the first sealing seat are provided circumferentially at the bottom of the sealing seat hole.

[0017] In some embodiments, the reduction unit adopts a multi-stage planetary reduction mechanism or a parallel-stage reduction mechanism.

[0018] A second aspect of the present invention provides a travel reducer, on which the travel reducer sealing structure is installed.

[0019] A third aspect of the present invention provides a mining machine, on which the travel reducer is installed.

[0020] Compared with the prior art, the travel reducer sealing structure of the present invention is composed of a first sealing strip, a push piece, an elastic element and a first sealing seat to form a first sealing unit. The first sealing unit can be manually maintained. The sealing pressure and axial wear compensation can be adjusted through the push piece, elastic element, etc. The first sealing strip and the first sealing seat are made of low-friction and wear-resistant materials with a certain hardness. The closed sealing structure is realized through the elastic element, which can effectively isolate foreign matter such as mud, sand, and dust; the second sealing unit can prevent particulate matter from entering, and the third sealing unit mainly prevents water vapor and dust from entering. The travel reducer sealing structure can realize the normal operation of the travel reducer under mud conditions and ensure the design life of the travel reducer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0022] Figure 1 It is an exploded view of the travel reducer of the present invention;

[0023] Figure 2 is a schematic structural diagram of a first sealing unit of the present invention;

[0024] Figure 3 Schematic diagram of the structure of the machine base of the present invention; (a) is a local enlarged view, and (b) is an AA sectional view;

[0025] Figure 4 Schematic diagram of the structure of the fixed flange of the present invention; (a) is the main view, (b) is the BB cross-sectional view and a partial enlarged view;

[0026] Figure 5 Schematic diagram of the structure of the first sealing strip of the present invention; (a) is the main view, (b) is the CC cross-sectional view and a partial enlarged view;

[0027] Figure 6 Schematic diagram of the structure of the first sealing seat of the present invention; (a) is the main view, (b) is the DD cross-sectional view, and (c) is the EE cross-sectional view;

[0028] Figure 7 Schematic diagram of the structure of the output flange of the present invention; (a) is the main view, (b) is the FF cross-sectional view and a partial enlarged view;

[0029] Figure 8 It is a schematic structural diagram of the sealing cover of the present invention;

[0030] In the figure: 1. machine base, 101. cover fixing hole, 102. maintenance hole; 2. fixing flange, 201. push hole a, 202. sealing slide groove, 203. labyrinth seal a, 204. second sealing seat a; 3. first sealing strip, 301. push hole b; 4. first sealing seat, 401. sealing groove, 402. fixing countersunk hole, 403. fixing hole; 5. output flange, 501. sealing seat hole, 502. labyrinth seal b, 503. sealing seat fixing hole, 504. second sealing seat b; 6. speed reduction part; 7. cover fixing piece; 8. cover, 801. cover hole; 9. push piece; 10. locking piece; 11. elastic element; 12. fixing bolt; 13. second seal.

[0031] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present invention more clear, the technical solutions of the present application are described in detail below with the help of accompanying drawings and specific embodiments. It should be understood that the embodiments of the present application and the specific features in the embodiments are detailed descriptions of the technical solutions of the present application, rather than limitations on the technical solutions of the present application. In the absence of conflict, the embodiments of the present application and the technical features in the embodiments can be combined with each other.

[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1-Figure 8 As shown, a travel reducer sealing structure includes a fixed flange 2, an output flange 5 and a sealing unit;

[0035] The fixed flange 2 is used to fix the travel reducer on the machine base 1; the output flange 5 is connected to the fixed flange 2 through a set of bearings, the output flange 5 can rotate relative to the fixed flange 2, and a speed reduction part 6 for speed reduction and torque increase is provided between the output flange 5 and the fixed flange 2;

[0036] The sealing unit is installed between the fixed flange 2 and the output flange 5, and the sealing unit includes a first sealing unit, a second sealing unit and a third sealing unit;

[0037] Among them, the first sealing unit includes a first sealing strip 3, a push piece 9, an elastic element 11 and a first sealing seat 4, the push piece 9 is installed on the fixed flange 2, the elastic element 11 is fastened to the first sealing strip 3 by the push piece 9, the first sealing strip 3 is installed on the first sealing seat 4 and the fixed flange 2, and the first sealing seat 4 is installed on the output flange 5, the second sealing unit adopts a labyrinth sealing assembly, and the third sealing unit adopts any one of a floating sealing assembly, a skeleton sealing assembly, and a lip-type sealing assembly. The sealing unit is used to enable the travel reducer to meet the use requirements of mud working conditions.

[0038] In some embodiments, Figure 1 , Figure 2 , Figure 4 As shown, the fixed flange 2 is provided with a sealing groove 202, and the first sealing strip 3 is located inside the sealing groove 202, and the relative position of the two has the function of axial sliding; the bottom of the sealing groove 202 is evenly provided with a plurality of push holes a 201 for installing the push piece 9 along the circumferential direction, and the push hole a 201 is a through hole, and the push piece 9 is installed inside the push hole a 201, and the push piece 9 is fixed by the locking member 10, and the axial and circumferential fixation between the push piece 9 and the push hole a 201 is achieved by the locking member 10; in this embodiment, the number of the push holes a 201 and the push piece 9 is N = 10, and N should actually be not less than 2. In addition, the push piece 9 can be bolted, and the locking member 10 can be welded nuts, etc.

[0039] In some embodiments, Figure 1 , Figure 2 , Figure 5 As shown, a plurality of push holes b 301 are evenly arranged along the circumferential direction on one side of the first sealing strip 3 facing the fixed flange 2, the elastic element 11 and the push piece 9 are placed in the push hole b 301 in sequence, one end of the elastic element 11 is attached to the bottom of the push hole b 301, and the first sealing strip 3 is circumferentially fixed to the fixed flange 2 through the push piece 9.

[0040] In some embodiments, Figure 1 , Figure 4 , Figure 7 As shown, the second sealing unit includes a labyrinth seal a 203 installed on the fixed flange 2 and a labyrinth seal b 502 installed on the output flange 5. The labyrinth seal a 203 and the labyrinth seal b constitute a labyrinth seal assembly. The radial clearance between the labyrinth seal a 203 and the labyrinth seal b is 1-3 mm, and the axial clearance is 2-5 mm. In this embodiment, the radial clearance is 1.5 mm and the axial clearance is 3 mm. In actual use, the clearance can be modified according to specific circumstances.

[0041] In some embodiments, Figure 1 , Figure 4 , Figure 7 As shown, the third sealing unit includes a second seal 13, a second sealing seat a 204 installed on the fixed flange 2, and a second sealing seat b 504 installed on the output flange 5. The second seal 13 is installed on the second sealing seat a 204 and the second sealing seat b 504 to form a floating seal assembly. Other sealing methods, such as a skeleton seal assembly, a lip-type seal assembly, etc., can also be adopted through simple modification.

[0042] In some embodiments, Figure 1 , Figure 3 , Figure 8 As shown, a cover 8 is installed on the machine base 1 through a cover fixing member 7, and a cover hole 801 is opened on the cover 8. A cover fixing hole 101 cooperating with the cover hole 801 is opened on the machine base 1. A maintenance hole 102 is also provided on the machine base 1, and the maintenance hole 102 has a similar distribution position to the pushing member 9; the minimum size of the maintenance hole 102 must ensure the passage and normal use of maintenance tools. The maintenance hole 102 of this embodiment is a waist-shaped arc hole with an arc span of 30°.

[0043] In some embodiments, Figure 1 , Figure 2 , Figure 6 As shown, the first sealing seat 4 is provided with a sealing groove 401 for installing the first sealing strip 3, and the bottom of the sealing groove 401 is provided with a plurality of fixing countersunk holes 402, and the bottom of the fixing countersunk holes 402 is provided with fixing holes 403 for fixing the first sealing seat 4 on the output flange 5. The first sealing seat 4 is installed on the output flange 5 by fixing bolts 12, and the head height of the fixing bolts 12 shall not enter the inside of the fixing countersunk holes 402. The depth of the fixing countersunk holes 402 is the maximum axial wear allowed by the sealing groove 401. In this embodiment, the depth of the fixing countersunk holes 402 is 6 mm.

[0044] In some embodiments, the first sealing strip 3 and the sealing groove 202 have an axial sliding function, and the first sealing strip 3 and the sealing groove 401 have a relative axial sliding and circumferential rotation setting. To ensure the sealing effect, the radial gap cannot be too large, which is 0.05-0.2mm. In this embodiment, the radial gap between the first sealing strip 3 and the sealing groove 202 and the sealing groove 401 is 0.1mm.

[0045] In some embodiments, Figure 1 , Figure 2 , Figure 7As shown, the output flange 5 is provided with a sealing seat hole 501 for installing the first sealing seat 4, and the bottom circumference of the sealing seat hole 501 is provided with a plurality of sealing seat fixing holes 503 for fixing the first sealing seat 4. The first sealing seat 4 is fixed inside the sealing seat hole 501 by fixing bolts 12. In this embodiment, the number of the sealing seat fixing holes 503 is 20, and the actual number should be no less than 2.

[0046] In some embodiments, the speed reduction unit 6 may adopt a multi-stage planetary speed reduction structure, or a parallel-stage speed reduction mechanism or other speed reduction mechanisms. The speed reduction unit 6 and the output flange 5 have a relatively fixed connection relationship.

[0047] In some embodiments, the elastic element 11 is a spring, a disc spring or a rubber member.

[0048] A second aspect of the present invention provides a travel reducer, on which the travel reducer sealing structure is installed.

[0049] A third aspect of the present invention provides a mining machine, on which the travel reducer is installed.

[0050] When using, Figure 1 , Figure 2 , Figure 4 and Figure 5 , install the first sealing strip 3 in the sealing groove 202 of the fixed flange 2, the push piece 9 and the locking piece 10 are connected to the fixed flange 2 through the push hole a 201, and the push piece 9 limits the circumferential rotation of the first sealing strip 3;

[0051] like Figure 1 , Figure 2 , Figure 4 and Figure 7 , the first sealing seat 4 is installed inside the sealing seat hole 501 of the output flange 5 and rotates with the output flange 5;

[0052] like Figure 1 , Figure 4 and Figure 5 , under the action of the push piece 9 and the elastic element 11, the first sealing strip 3 and the first sealing seat 4 are subjected to elastic force during the relative rotation process, and the end faces are always pressed together, which can prevent solid or mud foreign matter from penetrating from the end faces; because the first sealing strip 3 and the first sealing seat 4 are always in a state of relative sliding motion, the two should preferably be made of a low friction coefficient and high wear-resistant material, and in order to withstand the mud pressure, they should also have a certain hardness and rigidity, such as UPE;

[0053] like Figure 1 and Figure 3Through the maintenance hole 102, the pressing force between the first sealing strip 3 and the first sealing seat 4 can be adjusted by adjusting the axial position of the push piece 9; after wear occurs, the wear amount can be compensated;

[0054] like Figure 1 , Figure 4 and Figure 7 , a labyrinth seal (second sealing unit) is formed by labyrinth seal a 203 and labyrinth seal b 502 to prevent the infiltration of large particles.

[0055] like Figure 1 , Figure 4 and Figure 5 The second sealing seat a 204, the second sealing seat b 504 and the second seal 13 form a third sealing unit for preventing moisture, dust and the like from entering the interior of the reducer.

[0056] Obviously, after the implementation of the present invention, the sealing unit is used to effectively reduce the infiltration of mud and granular foreign matter, avoids the problem of extrusion damage of sealant parts caused by drying and agglomeration of mud, and improves the performance and service life of the travel reducer.

[0057] In the description provided herein, a large number of specific details are described. However, it is understood that embodiments of the present invention can be practiced without these specific details. In some instances, well-known methods, structures and techniques are not shown in detail so as not to obscure the understanding of this description.

[0058] In addition, those skilled in the art will understand that, although some embodiments described herein include certain features included in other embodiments but not other features, the combination of features of different embodiments also means being within the scope of protection of the present invention and forming different embodiments. For example, in the above embodiments, those skilled in the art can use them in combination according to the known technical solutions and the technical problems to be solved by this application.

[0059] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A travel reducer sealing structure, characterized in that: include: A fixed flange (2) fixed on the machine base (1); An output flange (5) is connected to the fixed flange (2), and a speed reducing part (6) for reducing speed and increasing torque is provided between the output flange (5) and the fixed flange (2); A sealing unit is installed between the fixed flange (2) and the output flange (5), the sealing unit comprising a first sealing unit, a second sealing unit and a third sealing unit, the first sealing unit comprising a first sealing strip (3), a push piece (9), an elastic element (11) and a first sealing seat (4), the push piece (9) being installed on the fixed flange (2), the elastic element (11) being fastened to the first sealing strip (3) by the push piece (9), the first sealing strip (3) being installed on the first sealing seat (4) and the fixed flange (2), the first sealing seat (4) being installed on the output flange (5), the second sealing unit adopting a labyrinth sealing assembly, the third sealing unit adopting any one of a floating sealing assembly, a skeleton sealing assembly and a lip-type sealing assembly, the sealing unit being used to enable the travel reducer to meet the use requirements of mud working conditions.

2. A travel reducer sealing structure according to claim 1, characterized in that: The fixed flange (2) is provided with a sealing groove (202) for installing a first sealing strip (3), and the bottom of the sealing groove (202) is evenly provided with a plurality of push holes a (201) for installing a push piece (9) along the circumferential direction, and the push piece (9) is fixed by a locking piece (10).

3. A travel reducer sealing structure according to claim 2, characterized in that: The first sealing strip (3) slides axially in the sealing sliding groove (202), and a radial clearance between the first sealing strip (3) and the sealing sliding groove (202) is 0.05-0.2 mm.

4. A travel reducer sealing structure according to claim 1, characterized in that: A plurality of push holes b (301) for installing elastic elements (11) and push pieces (9) are provided along the circumferential direction on the side of the first sealing strip (3) facing the fixed flange (2).

5. The travel reducer sealing structure according to claim 1, characterized in that: The second sealing unit comprises a labyrinth seal a (203) installed on the fixed flange (2) and a labyrinth seal b (502) installed on the output flange (5); the radial clearance between the labyrinth seal a (203) and the labyrinth seal b (502) is 1-3 mm, and the axial clearance is 2-5 mm.

6. A travel reducer sealing structure according to claim 1, characterized in that: The third sealing unit comprises a second seal (13), a second sealing seat a (204) mounted on the fixed flange (2), and a second sealing seat b (504) mounted on the output flange (5); the second seal (13) is mounted on the second sealing seat a (204) and the second sealing seat b (504).

7. The travel reducer sealing structure according to claim 1, characterized in that: A sealing cover (8) is mounted on the machine base (1) via a sealing cover fixing member (7); a sealing cover hole (801) is formed on the sealing cover (8); and a sealing cover fixing hole (101) matching with the sealing cover hole (801) is formed on the machine base (1).

8. A travel reducer sealing structure according to claim 7, characterized in that: The machine base (1) is also provided with a maintenance hole (102).

9. The travel reducer sealing structure according to claim 1, characterized in that: The first sealing seat (4) is provided with a sealing groove (401) for installing the first sealing strip (3), the bottom of the sealing groove (401) is provided with a plurality of fixing countersunk holes (402), and the bottom of the fixing countersunk holes (402) is provided with fixing holes (403) for fixing the first sealing seat (4) on the output flange (5).

10. A travel reducer sealing structure according to claim 1, characterized in that: The output flange (5) is provided with a sealing seat hole (501) for installing the first sealing seat (4), and a plurality of sealing seat fixing holes (503) for fixing the first sealing seat (4) are provided around the bottom of the sealing seat hole (501).

11. A travel reducer sealing structure according to claim 1, characterized in that: The speed reduction unit (6) adopts a multi-stage planetary speed reduction mechanism or a parallel-stage speed reduction mechanism.

12. A travel reducer, characterized in that: The travel reducer is equipped with the travel reducer sealing structure described in any one of claims 1 to 11.

13. A mining machine, characterized in that: The mining machinery is equipped with the travel reducer according to claim 12.

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