Novel main drive seal

Abstract

The utility model discloses a novel main drive seal which comprises a main drive shaft body, one end of the main drive shaft body is connected with a turntable bearing gear, an inner ring steel sleeve is fixed on the outer side of the main drive shaft body, an outer ring steel sleeve is arranged on the outer side of the turntable bearing gear, a first lining is arranged on the outer side of the inner ring steel sleeve, and an inner sealing ring is arranged on the outer side of the first lining. The first lining is arranged between the inner ring steel sleeve and the inner sealing ring, so that the sealing rings can be effectively prevented from being in direct contact with the steel sleeve, abrasion is reduced, external pollutants are effectively prevented from entering through the design, the sealing effect is good, the service life of the sealing rings is prolonged, and the service life of the sealing rings is prolonged. And moreover, the loss of the internal medium is reduced to the maximum extent, and the method has important significance for guaranteeing safe and stable operation of the shield tunneling machine.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machine main drive seals, in particular to a novel main drive seal. Background Art

[0002] In today's rapidly advancing urbanization, shield machines have become an indispensable piece of equipment in underground engineering construction. With the continued growth of tunneling projects worldwide, tunnel design and construction are evolving towards greater depths, harder rock formations, higher pressures, and longer distances. In this context, the shield machine's main drive system, as the core component of the entire system, has a key role to play in its operational reliability and stability, directly impacting the efficiency and safety of the entire machine.

[0003] To ensure the shield machine can operate efficiently and stably in complex and changing underground environments, it is particularly important to optimize the sealing structure of its main drive. By improving the sealing design, not only can the overall performance of the shield machine be significantly improved and its service life be extended, but maintenance costs can also be effectively reduced, thus saving a large amount of resources for the project.

[0004] The primary task of the main drive seal is to effectively protect the turntable bearings and gears, preventing the ingress of foreign matter and the leakage of the internal lubricant. The stable operation of the turntable bearings and gears depends on the effectiveness of the sealing system. However, in practice, existing sealing structures often experience wear between the seal ring and the outer steel sleeve of the drive shaft during long tunneling operations. This wear can cause dents on the seal ring surface, compromising sealing effectiveness and potentially causing equipment failure. Utility Model Content

[0005] In view of the problems in the related technology, the present invention proposes a new main drive seal to overcome the above technical problems existing in the existing related technology.

[0006] To this end, the specific technical solutions adopted in this utility model are as follows:

[0007] A new type of main drive seal includes a main drive shaft body, one end of the main drive shaft body is connected to a turntable bearing gear, an inner ring steel sleeve is fixed on the outside of the main drive shaft body, an outer ring steel sleeve is provided on the outside of the turntable bearing gear, a first bushing is provided on the outside of the inner ring steel sleeve, an inner sealing ring is provided on the outside of the first bushing, an outer sealing ring is provided on the outside of the inner sealing ring, and VD-type sealing rings are fixed inside the inner sealing ring and the outer sealing ring.

[0008] Furthermore, the outer sealing ring is connected to the outer steel sleeve through a first bolt.

[0009] Furthermore, a mounting plate is provided on the outer side of the inner sealing ring, a sealing mounting inner ring is fixedly connected to the inner side of the mounting plate, and a sealing mounting outer ring is fixedly connected to the outer side of the mounting plate.

[0010] Furthermore, the mounting plate is connected to the inner sealing ring via a second bolt.

[0011] Furthermore, a driving mainboard is provided on the outside of the turntable bearing gear, and the driving mainboard is provided inside the inner sleeve of the shield shell.

[0012] Furthermore, an O-type sealing ring is provided between the driving mainboard and the inner sleeve of the shield shell, and the O-type sealing ring is fixedly connected to the driving mainboard.

[0013] Furthermore, a wear-resistant plate is provided between the outer sealing ring and the inner sealing ring.

[0014] Furthermore, a groove is provided at one end of the inner sleeve of the shield shell, and a second bushing is provided inside the groove.

[0015] Furthermore, the turntable bearing gear is connected to the driving main board through a third bolt.

[0016] Furthermore, the inner sides of the sealing installation inner ring and the sealing installation outer ring are connected with four-lip sealing rings through screws.

[0017] The beneficial effects of the utility model are:

[0018] (1) By installing replaceable bushings on the inner steel sleeve and the inner sleeve of the shield, this design not only avoids direct contact between the sealing ring and the steel sleeve, thereby reducing wear, but also enables the second bolt to be removed when the bushing is worn, thereby enabling the mounting plate, the inner seal ring and the outer seal ring to be disassembled, facilitating the replacement of the first bushing and the second bushing, thereby ensuring the long-term effectiveness of the sealing system. By introducing this replaceable bushing design, the service life of the sealing ring can be greatly extended, and the risk of sealing failure due to wear can be reduced. At the same time, since the replacement of the bushing is relatively simple, the maintenance cost is also effectively controlled. In this way, not only the reliability and stability of the shield machine's main drive system are improved, but also the adaptability and work efficiency of the entire equipment during long-term excavation are enhanced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 This is a front view of a new main drive seal according to an embodiment of the utility model;

[0021] Figure 2 This is an exploded view of a new main drive seal according to an embodiment of the present utility model;

[0022] Figure 3 This is a structural diagram of a new main drive seal main drive shaft according to an embodiment of the utility model;

[0023] Figure 4 This is a structural diagram of a new main drive seal according to an embodiment of the utility model.

[0024] In the picture:

[0025] 1. Main drive shaft; 2. Turntable bearing gear; 3. Inner steel sleeve; 4. Outer steel sleeve; 5. First bushing; 6. Inner sealing ring; 7. Outer sealing ring; 8. VD-type sealing ring; 9. First bolt; 10. Mounting plate; 11. Sealing inner ring; 12. Sealing outer ring; 13. Second bolt; 14. Drive mainboard; 15. Shield inner sleeve; 16. O-ring; 17. Wear-resistant plate; 18. Groove; 19. Second bushing; 20. Third bolt; 21. Four-lip sealing ring. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] According to an embodiment of the present utility model, a new main drive seal is provided.

[0028] Example 1

[0029] like Figure 1-Figure 4 As shown, the new main drive seal according to the embodiment of the present utility model includes a main drive shaft body 1, one end of the main drive shaft body 1 is connected to a turntable bearing gear 2, an inner ring steel sleeve 3 is fixed to the outside of the main drive shaft body 1, and an outer ring steel sleeve 4 is provided on the outside of the turntable bearing gear 2. This steel sleeve not only provides additional protection, but also enhances the structural strength of the entire system. A first bushing 5 is provided on the outside of the inner ring steel sleeve 3, an inner sealing ring 6 is provided on the outside of the first bushing 5, an outer sealing ring 7 is provided on the outside of the inner sealing ring 6, and a wear-resistant plate 17 is provided between the outer sealing ring 7 and the inner sealing ring 6. By setting the wear-resistant plate 17, the VD-type sealing ring 8 can be prevented from damaging the inner sealing ring 6 and affecting the sealing effect.

[0030] A VD-type sealing ring 8 is fixed inside the inner sealing ring 6 and the outer sealing ring 7. The outer sealing ring 7 is connected to the outer steel sleeve 4 via a first bolt 9. A drive mainboard 14 is provided on the outside of the turntable bearing gear 2. The drive mainboard 14 is located inside the shield inner sleeve 15. An O-ring 16 is provided between the drive mainboard 14 and the shield inner sleeve 15. The O-ring 16 is fixedly connected to the drive mainboard 14. The turntable bearing gear 2 is connected to the drive mainboard 14 via a third bolt 20. Through the above scheme, the first layer of sealing of the turntable bearing gear 2 is achieved by providing the inner sealing ring 6, the outer sealing ring 7, and the VD-type sealing ring 8. Moreover, by providing the first bushing 5 between the inner steel sleeve 3 and the inner sealing ring 6, direct contact between the sealing ring and the steel sleeve can be effectively avoided, thereby reducing wear. This design not only effectively isolates the entry of external contaminants, but also minimizes the loss of internal media, which is of great significance for ensuring the safe and stable operation of the shield machine.

[0031] like Figure 1-Figure 4 As shown, a mounting plate 10 is provided on the outside of the inner sealing ring 6, a sealing mounting inner ring 11 is fixedly connected to the inside of the mounting plate 10, a sealing mounting outer ring 12 is fixedly connected to the outside of the mounting plate 10, and the mounting plate 10 is connected to the inner sealing ring 6 by a second bolt 13. A groove 18 is provided at one end of the inner sleeve 15 of the shield shell, and a second bushing 19 is provided inside the groove 18. The presence of the second bushing 19 not only increases the buffering performance of the system and reduces the influence of vibration generated during operation on the sealing effect, but also protects the inner sleeve 15 of the shield shell from direct wear. The inner sides of the sealing mounting inner ring 11 and the sealing mounting outer ring 12 are connected by screws with a four-lip sealing ring 21. Its four lips can contact different surfaces respectively to form multiple sealing barriers, which greatly enhances the sealing effect.

[0032] Each lip can automatically adjust its fit based on the pressure of the contact surface, ensuring excellent sealing performance even under high-pressure or high-speed operating conditions. Through the above placement, the installation plate 10, inner sealing ring 6, outer sealing ring 7, and four-lip sealing ring 21 are provided to achieve a second level of protection for the turntable bearing gear 2. This not only effectively prevents external contaminants from entering the machine, but also prevents internal media (such as lubricating oil) from leaking out. When the first bushing 5 and the second bushing 19 need to be replaced, the second bolt 13 can be removed, thereby removing the installation plate 10, and thus the sealing mounting inner ring 11 and the sealing mounting outer ring 12. This facilitates the replacement of the first bushing 5 and the second bushing 19, ensuring the long-term effectiveness of the sealing system.

[0033] In summary, with the help of the above-mentioned technical solution of the present invention, replaceable bushings are installed on the inner ring steel sleeve 3 and the shield inner sleeve 15. This design not only prevents the sealing ring from directly contacting the steel sleeve, thereby reducing wear, but also allows the second bolt 13 to be removed when the bushing is worn, thereby allowing the mounting plate 10, the sealing mounting inner ring 11, and the sealing mounting outer ring 12 to be disassembled, facilitating the replacement of the first bushing 5 and the second bushing 19, thereby ensuring the long-term effectiveness of the sealing system. By introducing this replaceable bushing design, the service life of the sealing ring can be greatly extended, and the risk of seal failure due to wear can be reduced. At the same time, since the bushing is relatively simple to replace, maintenance costs are also effectively controlled. In this way, not only the reliability and stability of the shield machine's main drive system are improved, but also the adaptability and work efficiency of the entire equipment during long-term excavation processes are enhanced.

[0034] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A new main drive seal, characterized in that: The invention comprises a main drive shaft (1), one end of the main drive shaft (1) is connected to a turntable bearing gear (2), an inner ring steel sleeve (3) is fixed on the outside of the main drive shaft (1), an outer ring steel sleeve (4) is provided on the outside of the turntable bearing gear (2), a first bushing (5) is provided on the outside of the inner ring steel sleeve (3), an inner sealing ring (6) is provided on the outside of the first bushing (5), an outer sealing ring (7) is provided on the outside of the inner sealing ring (6), and a VD-type sealing ring (8) is fixed inside the inner sealing ring (6) and the outer sealing ring (7).

2. A new main drive seal according to claim 1, characterized in that: The outer sealing ring (7) is connected to the outer ring steel sleeve (4) via a first bolt (9).

3. A new main drive seal according to claim 1, characterized in that: A mounting plate (10) is provided on the outside of the inner sealing ring (6), a sealing mounting inner ring (11) is fixedly connected to the inside of the mounting plate (10), and a sealing mounting outer ring (12) is fixedly connected to the outside of the mounting plate (10).

4. A new main drive seal according to claim 3, characterized in that: The mounting plate (10) is connected to the inner sealing ring (6) via a second bolt (13).

5. A new main drive seal according to claim 1, characterized in that: A driving mainboard (14) is provided on the outside of the turntable bearing gear (2), and the driving mainboard (14) is arranged inside the shield inner sleeve (15).

6. A new main drive seal according to claim 5, characterized in that: An O-type sealing ring (16) is provided between the driving mainboard (14) and the shield inner sleeve (15), and the O-type sealing ring (16) is fixedly connected to the driving mainboard (14).

7. A new main drive seal according to claim 1, characterized in that: A wear-resistant plate (17) is provided between the outer sealing ring (7) and the inner sealing ring (6).

8. A new main drive seal according to claim 5, characterized in that: A groove (18) is provided at one end of the shield inner sleeve (15), and a second bushing (19) is provided inside the groove (18).

9. A new main drive seal according to claim 1, characterized in that: The turntable bearing gear (2) is connected to the driving main board (14) via a third bolt (20).

10. A new main drive seal according to claim 3, characterized in that: The inner sides of the sealing mounting inner ring (11) and the sealing mounting outer ring (12) are connected with a four-lip sealing ring (21) via screws.

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