Sectional type main drive sealing runway

Abstract

The utility model discloses a sectional type main drive sealing runway, which belongs to the technical field of drive sealing systems, and comprises a first sealing runway, a second sealing runway and a lip-shaped seal used for abutting against the sealing runways, the first sealing runway is provided with a first mounting hole, and the second sealing runway is provided with a second mounting hole. The first sealing runway is provided with a first mounting hole, the second sealing runway is provided with a second mounting hole corresponding to the first mounting hole, locking bolts are arranged in the first mounting hole and the second mounting hole, the locking bolts are provided with nuts matched with the locking bolts, the first sealing runway is further provided with a jackscrew hole, and the interior of the jackscrew hole is in threaded connection with a short bolt and a long bolt. The sealing runway is arranged to be in a sectional type, the sealing runway at the front end is prone to damage, only the sealing runway at the front end can be replaced, meanwhile, the first sealing runway can be separated from the second sealing runway through the arranged jackscrew hole and the long bolt, and replacement is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of drive sealing systems, in particular to a segmented main drive sealing runway. Background Art

[0002] The main drive sealing system of the shield machine is one of the most important systems in the huge and complex system of the shield machine. Its main function is to prevent sand, mud, water, etc. in the soil bin from entering the inner side of the drive box and the main bearing. The existing main drive sealing system mainly adopts multi-layer multi-channel lip seals combined with grease injection to achieve the sealing function. Figure 7 As shown, the sealing track is fixed to the driving disc by bolts. After the four lip seals are installed, the lip positions contact with the sealing track and are compressed, thereby achieving a sealing effect.

[0003] In normal operation, the working surface (lip contact surface) of the sealing runway and the lip seal are in relative motion, and there is wear between them. The sand and gravel in the soil bin enter the grease discharge channel at the front end and are blocked by the first seal. At this time, the sand and gravel are mixed with the discharged grease and gather between the front end of the first seal and the sealing runway, and move relative to each other. The presence of sand and gravel accelerates the wear of the sealing runway.

[0004] When the sealing runway is worn, the compression of the lip seal will decrease and the sealing performance will decline. At the same time, when the hardened layer on the working surface of the sealing runway is worn, the wear of the remaining sealing runway will be accelerated, which poses a major safety problem. Therefore, when the main drive is repaired, the sealing runway with excessive wear will generally be replaced.

[0005] There are still some defects in the above technical conditions: Figure 8 Because sand and gravel participate in the movement of the first seal, and there is only grease in the second, third and fourth seals, the wear of point A is often several times or even dozens of times that of points B, C and D. Because the local wear of point A exceeds the standard, the entire sealing runway needs to be replaced, resulting in increased maintenance costs.

[0006] Based on this, the utility model designs a segmented main drive sealed runway to solve the above problems. Utility Model Content

[0007] The purpose of the utility model is to provide a segmented main drive sealed runway to solve the above technical problems.

[0008] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a segmented main drive sealed runway, comprising a No. 1 sealed runway and a No. 2 sealed runway arranged on one side of a driving disk, and also comprising a lip seal for pressing against the sealed runway, wherein a No. 1 mounting hole is provided on the No. 1 sealed runway, and a No. 2 mounting hole corresponding to the No. 1 mounting hole is provided on the No. 2 sealed runway, and locking bolts are provided inside the No. 1 mounting hole and the No. 2 mounting hole, and one end of the locking bolt passes through the No. 1 mounting hole and the No. 2 mounting hole and is threadedly connected to the driving disk, and a top screw hole is also provided on the No. 1 sealed runway, and a short bolt or a long bolt can be threadedly connected inside the top screw hole.

[0009] By adopting the above technical solution, the sealed runway can be divided into two parts, and the No. 1 sealed runway can be easily disassembled and assembled.

[0010] Preferably, a No. 1 positioning hole and a No. 2 positioning hole are respectively formed on the No. 1 sealed runway and the No. 2 sealed runway, and positioning pins are inserted into the No. 1 positioning hole and the No. 2 positioning hole.

[0011] By adopting the above technical solution, the installation effect can be improved and the lateral pressure on the locking bolt during the rotation process can be reduced.

[0012] Preferably, a contact portion for contacting with the long bolts is provided on the second sealed runway.

[0013] By adopting the above technical solution, the effect of pressing and ejecting can be improved.

[0014] Preferably, the depth of the contact portion is 0-10 cm.

[0015] By adopting the above technical solution, the depth can be selected according to actual conditions to improve the use effect.

[0016] Preferably, a sealing ring is further provided between the No. 1 sealed runway and the No. 2 sealed runway.

[0017] By adopting the above technical solution, the installation sealing performance of the sealed runway can be improved.

[0018] To sum up, the present application has the following beneficial technical effects: by setting the sealing runway into sections, the sealing runway at the front end is easily damaged, and only the sealing runway at the front end needs to be replaced, thereby reducing costs; at the same time, by setting top screw holes, positioning holes and long bolts, the disassembly and assembly of the two sealing runways are facilitated. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 This is a schematic diagram of the installation of the locking bolt in this embodiment;

[0021] Figure 2 Schematic diagram of the installation of short bolts in this embodiment;

[0022] Figure 3 Schematic diagram of the installation of the long bolt in this embodiment;

[0023] Figure 4 Schematic diagram of the installation of the positioning pin in this embodiment;

[0024] Figure 5 This is a partial structural schematic diagram of the No. 1 sealed runway in this embodiment;

[0025] Figure 6 This is a partial structural schematic diagram of the No. 2 sealed runway in this embodiment;

[0026] Figure 7 , Figure 8 It is a schematic diagram of the principle of the prior art.

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 1. Sealing track No. 1; 2. Sealing track No. 2; 3. Lip seal; 4. Mounting hole No. 1; 5. Mounting hole No. 2; 6. Locking bolt; 7. Sealing ring; 8. Top screw hole; 9. Short bolt; 10. Long bolt; 11. Positioning hole No. 1; 12. Positioning hole No. 2; 13. Positioning pin; 14. Contact part. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] The following is combined with Figure 1-6 This application is described in further detail.

[0031] Reference Figure 1 and Figure 2A segmented main drive sealed runway includes a No. 1 sealed runway 1 and a No. 2 sealed runway 2 arranged on one side of a drive disc. The No. 1 sealed runway 1 and the No. 2 sealed runway 2 can be spliced ​​with each other, and also includes a lip seal 3 for pressing against the sealed runway, wherein there are sand and stones at the lip seal 3 near the No. 1 sealed runway 1, which is easy to cause more wear to the No. 1 sealed runway 1 during rotation. The No. 1 sealed runway 1 is provided with a No. 1 mounting hole 4, and the No. 2 sealed runway 2 is provided with a No. 1 mounting hole 4 opposite to the No. 1 mounting hole 4. The No. 2 mounting hole 5 corresponds to the No. 1 mounting hole 4. The interior of the No. 1 mounting hole 4 and the No. 2 mounting hole 5 is provided with a locking bolt 6. One end of the locking bolt 6 passes through the No. 1 mounting hole (4) and the No. 2 mounting hole (5) and is threadedly connected to the driving disk for fixing the No. 1 sealed runway 1 and the No. 2 sealed runway 2. The No. 1 sealed runway 1 is also provided with a top screw hole 8. The interior of the top screw hole 8 can be threadedly connected with a short bolt 9 or a long bolt 10. When the long bolt 10 completely enters the interior of the top screw hole 8, one end of the long bolt 10 contacts the No. 2 sealed runway 2.

[0032] Further, see Figure 4 The first sealed runway 1 and the second sealed runway 2 are respectively provided with a first positioning hole 11 and a second positioning hole 12 , and positioning pins 13 are inserted into the first positioning hole 11 and the second positioning hole 12 .

[0033] Further, see Figure 3 A contact portion 14 for contacting the long bolt 10 is provided on the second sealed runway 2.

[0034] Furthermore, the depth of the contact portion 14 is 0-10 cm, which is used to limit the long bolt 10 and can better push out the No. 1 sealed runway 1.

[0035] Furthermore, a sealing ring 7 is provided between the No. 1 sealed runway 1 and the No. 2 sealed runway 2 .

[0036] The implementation principle of this embodiment is as follows: the sealing runway is composed of a No. 1 sealing runway 1 and a No. 2 sealing runway 2, which are connected to the driving disk by bolts using a transition fit or an interference fit. A sealing ring 7 is arranged between the No. 1 sealing runway 1 and the No. 2 sealing runway 2 to prevent oil leakage from the contact surface between the No. 1 sealing runway 1 and the No. 2 sealing runway 2. In order to facilitate the installation of the No. 1 sealing runway 1 on the No. 2 sealing runway 2, positioning holes (11, 12) are arranged, and the positions of the No. 1 sealing runway 1 and the No. 2 sealing runway 2 are fixed with a positioning pin 13. In order to facilitate the disassembly of the No. 1 sealing runway 1 during maintenance, a top screw hole 8 is arranged on the No. 1 sealing runway 1. When disassembling, the No. 1 sealing runway 1 is pushed out with a long bolt 10 to separate the No. 1 sealing runway 1 from the No. 2 sealing runway 2. During normal operation, in order to protect the thread in the top screw 8 from being damaged, a short bolt 9 is used for blocking and protection.

[0037] In the description of the present invention, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inside", "front", "center", "both ends" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0039] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A segmented main drive sealed runway, comprising a first sealed runway (1) and a second sealed runway (2) arranged on one side of a drive disc, and also comprising a lip seal (3) for pressing against the sealed runway, characterized in that: The No. 1 sealed runway (1) is provided with a No. 1 mounting hole (4), the No. 2 sealed runway (2) is provided with a No. 2 mounting hole (5) corresponding to the No. 1 mounting hole (4), locking bolts (6) are arranged inside the No. 1 mounting hole (4) and the No. 2 mounting hole (5), one end of the locking bolt (6) passes through the No. 1 mounting hole (4) and the No. 2 mounting hole (5) and is threadedly connected to the driving disk, and the No. 1 sealed runway (1) is also provided with a top screw hole (8), and a short bolt (9) or a long bolt (10) can be threadedly connected inside the top screw hole (8).

2. A segmented main drive sealed runway according to claim 1, characterized in that: The first sealed runway (1) and the second sealed runway (2) are respectively provided with a first positioning hole (11) and a second positioning hole (12), and positioning pins (13) are inserted into the first positioning hole (11) and the second positioning hole (12).

3. The segmented main drive sealed runway according to claim 1, characterized in that: The second sealed runway (2) is provided with a contact portion (14) for contacting the long bolt (10).

4. The segmented main drive sealed runway according to claim 3, characterized in that: The depth of the contact portion (14) is 0-10 cm.

5. The segmented main drive sealed runway according to claim 1, characterized in that: A sealing ring (7) is also provided between the No. 1 sealed runway (1) and the No. 2 sealed runway (2).

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